WO2016141845A1

WO2016141845A1 - Sending and receiving method and apparatus for downlink common channel

Info

Publication number: WO2016141845A1
Application number: PCT/CN2016/075472
Authority: WO
Inventors: 任斌; 李向宁; 李琼
Original assignee: 电信科学技术研究院
Priority date: 2015-03-09
Filing date: 2016-03-03
Publication date: 2016-09-15
Also published as: CN106034325B; CN106034325A

Abstract

Disclosed are a sending and receiving method and apparatus for a downlink common channel, which are used for decreasing interference with a downlink common channel with a frequency-domain sending position fixed at a full bandwidth stationary position. The method comprises: a network side obtains, according to a network side interference measurement value and terminal side interference level indication information, an average interference level difference value of a user equipment; judge whether the average interference level difference value is greater than a set first threshold value or not; if so, group pre-set frequency-domain candidate positions, and send the downlink common channel successively on each group of candidate positions at a sending moment by adopting a frequency hopping way; and otherwise, select N candidate positions from the pre-set frequency-domain candidate positions, and send the downlink common channel on the N candidate positions at the sending moment. Therefore, the interference problem of other communication systems on a same frequency band and the manmade malicious interference problem are solved, thereby effectively decreasing the interference on the channel with a frequency-domain resource mapping position fixed at a full bandwidth stationary position.

Description

Method and device for transmitting and receiving downlink common channel

The present application claims priority to Chinese Patent Application No. 201510102681.7, entitled "Sending and Receiving Method and Apparatus for Downlink Common Channels", filed on March 9, 2015, the entire contents of which are incorporated by reference. Combined in this application.

Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for transmitting and receiving a downlink common channel.

Background technique

The modulation technology of the Long Term Evolution (LTE) system adopts Orthogonal Frequency Division Multiplexing (OFDM), and the downlink multiple access technology adopts Orthogonal Frequency Division Multiple Access (OFDMA). The downlink common channel includes a Primary Synchronized Signal (PSS) channel/Secondary Synchronization Signal (SSS) channel/Physical Broadcast Channel (PBCH). The PSS/SSS signal mainly performs functions such as downlink time synchronization, downlink frequency synchronization, and cell ID detection of the cell initial search and cell selection. The initial search of a cell is a basic process of searching for a camped cell and realizing synchronization after the user equipment is turned on, and is a basis for the UE to access the network to provide various services for the user. The PBCH carries Master Information Block (MIB) information, including important system information such as system bandwidth, and is the basis for normal reception processing of subsequent traffic channels. In 700MHz public safety communication applications, other industrial applications and military communication applications, the typical interference modes are broadband noise interference, partial noise interference, single tone interference and multi-tone interference. The characteristics of the interference signal are shown in Figure 1.

The LTE system is a broadband mobile communication system and is currently being used more and more in the world. However, in public safety communication applications such as 700 MHz and other industrial applications (such as military communication), a significant disadvantage is that it is relatively susceptible to interference and artificial malicious interference from other communication systems in the same frequency band. According to the definition of the LTE system, the downlink common channel such as PSS/SSS/PBCH is the basic function of the terminal accessing the network and providing various services for the user, the Physical Downlink Shared Channel (PDSCH) and the physical uplink sharing. The Physical Uplink Shared Channel (PUSCH) carries user services. The PDSCH and PUSCH can use the flexible uplink and downlink scheduling technology to effectively avoid interference; the frequency domain resource mapping position of the downlink common channel such as PSS/SSS/PBCH is fixed, and the interference cannot be avoided by scheduling; once it is interfered, the system will be caused. I am completely embarrassed and unable to work properly. The LTE system includes two division modes: Time Division Duplex (TDD) and Frequency Division Duplex (FDD). The TDD mode is taken as an example to illustrate the time-frequency domain signal characteristics of the PSS/SSS/PBCH. In the TD-LTE system, the PSS/SSS/PBCH only occupies 6 physical resource blocks (PRBs) in the middle of the bandwidth. The PSS is transmitted once every half frame (5 ms) and is always located in the downlink pilot time slot. (Downlink Pilot Time Slot, DwPTS) on the third OFDM symbol; SSS is located in slot 1 and time slot 11 on the last OFDM symbol. The PBCH channel is located on the first 4 OFDM symbols of slot 0 of subframe 0.

In summary, for common signals/channels such as PSS/SSS/PBCH, since the resource mapping position in the frequency domain is fixed at the six PRBs of the central frequency point, interference and human malicious interference for other communication systems at the central frequency point are There is currently no effective solution.

Summary of the invention

It is an object of the present invention to provide a method and apparatus for transmitting and receiving a downlink common channel, which is used to reduce interference caused by a channel whose frequency mapping position in a frequency domain is fixed at a fixed position of a full bandwidth.

The object of the invention is achieved by the following technical solutions:

A method for transmitting a downlink common channel includes:

The network side obtains the average interference level difference value of the user equipment according to the network side interference measurement value obtained by the self measurement and the terminal side interference level indication information reported by the user equipment;

The network side determines whether the average interference level difference value exceeds a set first threshold;

If yes, the network side groups the preset frequency domain candidate positions, and sequentially transmits the downlink common channel on each candidate location group by using a frequency hopping method at the sending time;

Otherwise, the network side selects N candidate locations in the preset frequency domain candidate positions based on the measured network side interference measurement values, and sends the downlink common channel in the N candidate locations at the sending moment.

In this way, by using a plurality of alternate frequency points to transmit the downlink common channel, the interference problem and the artificial malicious interference problem of other communication systems in the same frequency band are solved, and the resource mapping position for the frequency domain is effectively fixed at a fixed position of the full bandwidth. The interference experienced by the channel.

Optionally, further comprising:

In the pre-processing stage, the network side maps P frequency domain candidate locations within the access frequency range according to the available bandwidth of the system;

The network side divides the entire system available bandwidth into P subbands, wherein each subband is centered on one frequency domain candidate location and includes 6 PRBs, and P is a positive integer.

Optionally, the network side maps P frequency domain candidate locations in the access frequency range according to the available bandwidth of the system, and specifically includes:

The network side determines, according to the available bandwidth of the system, a default frequency domain transmission location of the following common channel as a reference point, and determines P frequency domain candidate locations one by one according to the set frequency domain interval within the access frequency range.

Optionally, the network side obtains the average interference level difference value of the user equipment according to the network side interference measurement value measured by the self-measurement and the terminal side interference level indication information reported by the user equipment, and specifically includes:

For each subband, the network side obtains a PRB interference measurement value of the subband according to the strong interference determination parameter of the subband, where the PRB interference measurement value of the subband is all PRBs on the subband. Average interference measurement;

If the PRB interference measurement value of the sub-band meets a preset condition, determining that there is strong interference on the sub-band; otherwise, determining that there is no strong interference on the sub-band;

The network side obtains the network side interference level indication information according to whether there is strong interference on each subband, and obtains the terminal side interference level indication information reported by all the user equipments accessed by the current system, based on the terminal side interference level on all the user equipments. The indication information and the network side interference level indication information obtain an average interference level difference value of the user equipment.

Optionally, if the measured value of the PRB interference of the sub-band meets a preset condition, determining that there is strong interference on the sub-band; otherwise, determining that there is no strong interference on the sub-band, specifically:

The strong interference determination parameter is a channel quality indicator, and the network side uses the PRB uplink channel quality indicator measurement value of the subband as a PRB interference measurement value of the subband, and determines a PRB uplink channel quality of the subband. Determining that there is strong interference on the sub-band when the measured value is not greater than a preset channel quality indication threshold; otherwise, determining that there is no strong interference on the sub-band; or

The strong interference determination parameter is a signal to interference and noise ratio, and the network side uses the PRB uplink signal to interference and noise ratio measurement value of the subband as a PRB interference measurement value of the subband, and determines a PRB uplink of the subband. When the signal to interference and noise ratio measurement value is not greater than a preset signal to interference and noise ratio threshold value, it is determined that there is strong interference on the subband; otherwise, it is determined that there is no strong interference on the subband; or

The strong interference determination parameter is a signal to interference ratio, and the network side uses the PRB uplink signal to interference ratio measurement value of the subband as a PRB interference measurement value of the subband, and determines a PRB uplink signal of the subband. If the measured value is not greater than a preset signal-to-interference ratio threshold, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band; or

The strong interference determination parameter is a dry noise ratio, and the network side uses the PRB uplink dry noise ratio measurement value of the subband as a PRB interference measurement value of the subband, and determines a PRB uplink dry noise of the subband. If the measured value is greater than a preset dry noise ratio threshold, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band; or

The strong interference determination parameter is the interference power, and the network side uses the PRB uplink interference power measurement value of the subband as the PRB interference measurement value of the subband, and determines the PRB uplink interference power measurement value of the subband. When the interference power threshold is greater than the preset, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band.

Optionally, the network side obtains the terminal side interference level indication information reported by all the user equipments that are accessed by the current system, and obtains the user based on the terminal side interference level indication information and the network side interference level indication information on all the user equipments. The average interference level difference of the equipment, including:

And determining, by the network side, the number of subbands different from the network side interference level indication information, and the network side interference level indication information, based on the network side interference level indication information, And dividing the determined number of sub-bands by the number of all sub-bands to obtain a difference value of the interference level of the user equipment;

Determining whether the interference level difference value of each user equipment is greater than a preset second threshold, and if yes, determining the The interference level of the user equipment and the network side is different, otherwise, the interference level of the user equipment and the network side is determined to be the same;

Determine the number of user equipments that are not in the same level as the interference level on the network side of the current system, and divide the determined number of user equipments by the total number of user equipments accessed by the current system to obtain the difference in the average interference level of the user equipment. value.

Optionally, the network side groups the preset frequency domain candidate positions, and sends the downlink common channel on each candidate location group by using a frequency hopping method at the sending time, which specifically includes:

The network side determines frequency domain candidate location packets and numbers them from 0 to N1-1, where N1 is the number of frequency domain candidate location packets, and the frequency offset of the preset frequency domain candidate locations according to the distance from the center frequency point. And numbering from 0 to P-1 with the minimum value of the frequency offset as a reference. For each of the preset frequency domain candidate positions Xi, calculating the remainder Y1 obtained by dividing Xi by N1, and placing the corresponding frequency domain candidate position. In the group numbered Y1, where Xi is the number of any one of the frequency domain candidate positions, and Xi and N1 are positive integers;

The downlink common channel is sequentially transmitted on each candidate location group by using a frequency hopping method, where the downlink common channel includes a primary synchronization channel PSS, a secondary synchronization channel SSS, and a physical broadcast channel PBCH, where the PBCH carries the indication center frequency. The field of the dot.

Optionally, the network side selects N candidate locations in the preset frequency domain candidate positions based on the measured network side interference measurement values, and sends the downlink common channel on the N candidate locations at the sending moment, specifically including :

Based on the PRB interference measurement value of each subband, the network side sorts all subbands according to the effective interference value of the subbands, and filters out the N subbands with the smallest effective interference value, from the preset frequency domain candidate positions. Selecting a corresponding N candidate locations, and transmitting a downlink common channel at the N candidate locations, where the downlink common channel includes a PSS, an SSS, and a PBCH, where the PBCH carries the indication center frequency point number Field.

Optionally, the network side sorts all the sub-bands according to the effective interference value of the sub-bands according to the PRB interference measurement value of each sub-band, and specifically includes:

The strong interference determination parameter is a channel quality indicator, and the network side sorts all sub-bands according to the PRB uplink channel quality indication measurement value of the sub-band from large to small;

The strong interference determination parameter is a signal to interference and noise ratio, and the network side sorts all subbands according to the PRB uplink signal to interference and noise ratio measurement values of the subbands from large to small;

The strong interference determination parameter is a signal-to-interference ratio, and the network side sorts all sub-bands according to the PRB uplink signal-to-interference ratio measurement values of the sub-bands from large to small;

The strong interference determination parameter is a dry-to-noise ratio, and the network side sorts all sub-bands according to the measured value of the PRB uplink dry-to-noise ratio of the sub-band from small to large;

The strong interference judgment parameter is the interference power, and the network side sorts all the sub-bands according to the PRB uplink interference power measurement values of the sub-bands from small to large.

A method for receiving a downlink common channel includes:

The user equipment determines P frequency domain candidate locations mapped by the network side and P subbands corresponding to P frequency domain candidate locations;

The user equipment acquires the interference measurement value of the P subbands on the terminal side, and obtains the terminal side interference level indication information based on the interference measurement values of the P subbands, and reports the interference measurement based on the P subbands of the terminal side after the terminal side interference level indication information is reported to the network side. The value selects M candidate locations among the P frequency domain candidate locations for receiving processing of the downlink common channel, where M and P are both positive integers and M is less than P.

In this way, by adopting the reception of the downlink common channel for multiple alternate frequency points, the interference problem and the artificial malicious interference problem of other communication systems in the same frequency band are solved, and the fixed resource mapping position for the frequency domain is fixed at the full bandwidth. The interference of the channel of the location.

Optionally, the user equipment acquires the interference measurement value of the P subbands on the terminal side, and obtains the terminal side interference level indication information based on the interference measurement value of the P subbands, and reports the information to the network side, specifically:

For each subband, the user equipment acquires a PRB interference measurement value of the subband according to the strong interference determination parameter of the subband, where the PRB interference measurement value of the subband is all PRBs on the subband. Average interference measurement;

The user equipment obtains the terminal side interference level indication information and reports it to the network side according to whether there is strong interference on each sub-band.

Optionally, if the measured value of the PRB interference of the sub-band meets a preset condition, determining that there is strong interference on the sub-band, otherwise determining that there is no strong interference on the sub-band, specifically:

The strong interference determination parameter is a channel quality indicator, and the user equipment uses the PRB downlink channel quality indicator measurement value of the subband as a PRB interference measurement value of the subband, and determines a PRB downlink CQI measurement of the subband. When the value is not greater than a preset CQI threshold, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band; or

The strong interference determination parameter is a signal to interference and noise ratio, and the user equipment uses the PRB downlink signal to interference and noise ratio measurement value of the subband as a PRB interference measurement value of the subband, and determines a PRB downlink of the subband. When the signal to interference and noise ratio measurement value is not greater than a preset signal to interference and noise ratio threshold value, it is determined that there is strong interference on the subband; otherwise, it is determined that there is no strong interference on the subband; or

The strong interference determination parameter is a signal to interference ratio, and the user equipment uses the PRB downlink signal to interference ratio measurement value of the subband as a PRB interference measurement value of the subband, and determines a PRB downlink signal of the subband. If the measured value is not greater than a preset signal-to-interference ratio threshold, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band; or

The strong interference determination parameter is a dry noise ratio, and the user equipment uses the PRB downlink dry noise ratio measurement value of the subband as a PRB interference measurement value of the subband, and determines a PRB downlink dry noise of the subband. If the measured value is greater than a preset dry noise ratio threshold, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band; or

The strong interference determination parameter is the interference power, and the user equipment uses the PRB downlink interference power measurement value of the subband as the PRB interference measurement value of the subband, and determines the PRB downlink interference power measurement value of the subband. When the interference power threshold is greater than the preset, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band.

Optionally, the interference measurement of the P subbands of the terminal side of the terminal is selected, and the M candidate locations are selected to perform the receiving processing of the downlink common channel, where the method includes:

The user equipment sorts all sub-bands according to the PRB interference measurement value of each sub-band according to the effective interference value of the sub-bands, and filters out M sub-bands with the smallest effective interference value, from the preset frequency domain. Selecting the corresponding M candidate locations in the candidate locations, and performing the downlink common channel receiving process on the M candidate locations at the sending moment, where the downlink common channel includes a PSS, an SSS, and a PBCH, where the PBCH carries A field indicating the center frequency point number.

Optionally, the user equipment, according to the PRB interference measurement value of each sub-band, sorts all the sub-bands according to the effective interference value of the sub-band from small to large, and specifically includes:

The strong interference determination parameter is CQI, and the user equipment sorts all subbands according to the PRB downlink CQI measurement values of the subbands from large to small;

The strong interference determination parameter is a signal to interference and noise ratio, and the user equipment sorts all subbands according to the PRB downlink signal to interference and noise ratio measurement values of the subbands from large to small;

The strong interference determination parameter is a signal to interference ratio, and the user equipment sorts all subbands according to the PRB downlink signal to interference ratio measurement value of the subband from large to small;

The strong interference determination parameter is a dry-to-noise ratio, and the user equipment sorts all sub-bands according to the PRB downlink dry-to-noise ratio measurement value of the sub-band from small to large;

The strong interference determination parameter is the interference power, and the user equipment sorts all the sub-bands according to the PRB downlink interference power measurement values of the sub-bands from small to large.

A transmitting device for a downlink common channel, comprising:

An obtaining unit, configured to obtain, according to the network-side interference measurement value obtained by the self-measurement and the terminal-side interference level indication information reported by the user equipment, the average interference level difference value of the user equipment;

a determining unit, configured to determine whether the average interference level difference value exceeds a set first threshold;

a first processing unit, configured to group preset frequency domain candidate positions, and sequentially send a downlink common channel on each candidate location group by using a frequency hopping method at a sending time;

The second processing unit is configured to select N candidate locations in the preset frequency domain candidate locations based on the network side interference measurement values obtained by the self measurement, and send the downlink common channel in the N candidate locations at the sending moment.

In this way, by using a plurality of alternate frequency points to transmit the downlink common channel, other communication in the same frequency band is solved. The interference problem of the system and the problem of human malicious interference effectively reduce the interference of the channel fixed to the fixed position of the full bandwidth for the resource mapping position of the frequency domain.

Optionally, further comprising:

a mapping unit, configured to map P frequency domain candidate locations within an access frequency range according to a system available bandwidth in a preprocessing stage;

The entire system available bandwidth is divided into P subbands, each of which is centered on one frequency domain candidate location and contains 6 PRBs, P being a positive integer.

Optionally, when mapping P frequency domain candidate locations within the access frequency range according to the available bandwidth of the system, the mapping unit is specifically configured to:

According to the available bandwidth of the system, the default frequency domain transmission location of the following common channel is used as a reference point, and P frequency domain candidate locations are determined one by one according to the set frequency domain interval within the access frequency range.

Optionally, when the interference measurement value obtained by the self-measurement and the terminal-side interference level indication information reported by the user equipment are used to obtain the average interference level difference value of the user equipment, the acquiring unit is specifically configured to:

And obtaining, for each subband, a PRB interference measurement value of the subband according to the strong interference determination parameter of the subband, where the PRB interference measurement value of the subband is an average interference measurement of all PRBs on the subband value;

According to whether there is strong interference on each sub-band, the network-side interference level indication information is obtained, and the terminal-side interference level indication information reported by all user equipments accessed by the current system is obtained, based on the terminal-side interference level indication information and the location on all user equipments. The network side interference level indication information is obtained, and the average interference level difference value of the user equipment is obtained.

Optionally, if the measured value of the PRB interference of the sub-band meets a preset condition, determining that there is strong interference on the sub-band; otherwise, determining that there is no strong interference on the sub-band, the acquiring unit Specifically used for:

The strong interference determination parameter is a channel quality indicator, and the PRB uplink channel quality indicator measurement value of the subband is used as the PRB interference measurement value of the subband, and the PRB uplink channel quality indicator measurement value of the subband is determined not to be If it is greater than a preset channel quality indication threshold, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band; or

The strong interference determination parameter is a signal to interference and noise ratio, and the PRB uplink signal to interference and noise ratio measurement value of the subband is used as a PRB interference measurement value of the subband, and the PRB uplink signal to interference and noise ratio of the subband is determined. When the measured value is not greater than a preset signal to interference and noise ratio threshold, it is determined that there is strong interference on the subband; otherwise, it is determined that there is no strong interference on the subband; or

The strong interference determination parameter is a signal to interference ratio, and the PRB uplink signal to interference ratio measurement value of the subband is used as the PRB interference measurement value of the subband, and the PRB uplink signal to interference ratio measurement value of the subband is determined not to be If it is greater than a preset signal-to-interference ratio threshold, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band; or

The strong interference determination parameter is a dry-to-noise ratio, and the measured value of the PRB uplink dry-to-noise ratio of the sub-band is used as the PRB interference measurement value of the sub-band, and the measured value of the PRB uplink dry-to-noise ratio of the sub-band is determined to be greater than Determining a strong interference on the sub-band when a preset dry-to-noise ratio threshold is determined; otherwise, determining that there is no strong interference on the sub-band; or

The strong interference determination parameter is interference power, and the PRB uplink interference power measurement value of the subband is used as the PRB interference measurement value of the subband, and determining that the PRB uplink interference power measurement value of the subband is greater than a preset When the interference power threshold is exceeded, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band.

Optionally, the terminal side interference level indication information reported by all the user equipments that are accessed by the current system is obtained, and the average interference of the user equipment is obtained based on the terminal side interference level indication information and the network side interference level indication information on all the user equipments. When the level difference value is used, the obtaining unit is specifically configured to:

Determining, according to the interference level indication information, a number of subbands different from the network side interference level indication information, and determining the determined sub-station, according to the interference level indication information reported by each user equipment Dividing the number of the sub-bands by the number of all sub-bands to obtain the interference level difference value of the user equipment;

Determining whether the interference level difference value of each user equipment is greater than a preset second threshold, and if yes, determining that the user equipment and the network side have different interference levels; otherwise, determining that the user equipment and the network side have the same interference level ;

Optionally, the first processing unit is specifically configured to: when the downlink common channel is sent on each candidate location group by using a frequency hopping method, and the first processing unit is used to:

Determining frequency domain candidate location packets and numbering them from 0 to N1-1, N1 is the number of frequency domain candidate location packets, and the frequency offset of the preset frequency domain candidate locations according to the frequency offset from the center frequency point The minimum value of the shift is numbered from 0 to P-1 as a reference. For each of the preset frequency domain candidate positions Xi, the remainder Y1 obtained by dividing Xi by N1 is calculated, and the corresponding frequency domain candidate position is placed in the number Y1. In the group, where Xi is the number of any one of the frequency domain candidate positions, and Xi and N1 are positive integers;

Optionally, the second measurement is performed by selecting N candidate locations in the preset frequency domain candidate positions based on the interference measurement values obtained by the self measurement, and transmitting the downlink common channel on the N candidate locations at the transmission time. The unit is specifically used to:

Based on the PRB interference measurement value of each subband, all the subbands are sorted according to the effective interference value of the subband from small to large, and the N subbands with the smallest effective interference value are selected, and the preset frequency domain candidate positions are selected. Corresponding N candidate locations, and transmitting a downlink common channel at the N candidate locations, where the downlink common channel includes a PSS, an SSS, and a PBCH, where the PBCH carries a field indicating a center frequency point number .

Optionally, based on the PRB interference measurement value of each subband, all subbands are reduced according to the effective interference value of the subband. When the sorting is performed, the second processing unit is specifically configured to:

The strong interference determination parameter is a channel quality indicator, and all subbands are sorted according to the measured value of the PRB uplink channel quality indicator of the subband from large to small;

The strong interference determination parameter is a signal to interference and noise ratio, and all subbands are sorted according to the measured value of the PRB uplink signal to interference and noise ratio of the subband from large to small;

The strong interference determination parameter is a signal to interference ratio, and all subbands are sorted according to the PRB uplink signal to interference ratio measurement value of the subband from large to small;

The strong interference determination parameter is a dry-to-noise ratio, and all sub-bands are sorted according to the measured value of the PRB uplink dry-to-noise ratio of the sub-band from small to large;

The strong interference determination parameter is the interference power, and all the sub-bands are sorted according to the PRB uplink interference power measurement value of the sub-band from small to large.

A receiving device for a downlink common channel, comprising:

a determining unit, configured to determine P frequency domain candidate locations mapped by the network side and P subbands corresponding to P frequency domain candidate locations;

The receiving unit is configured to acquire the interference measurement value of the P subbands on the terminal side, and obtain the terminal side interference level indication information based on the interference measurement values of the P subbands, and report the interference to the network side based on the interference of the P subbands on the terminal side. The measured value selects M candidate positions among the P frequency domain candidate positions for receiving processing of the downlink common channel, where M and P are both positive integers, and M is smaller than P.

Optionally, the interference measurement value of the P sub-bands on the terminal side is obtained, and the terminal-side interference level indication information is obtained and reported to the network side based on the interference measurement values of the P sub-bands, where the receiving unit is specifically configured to:

According to whether there is strong interference on each sub-band, the terminal side interference level indication information is obtained and reported to the network side.

Optionally, if the measured value of the PRB interference of the sub-band meets a preset condition, determining that there is strong interference on the sub-band, otherwise, determining that there is no strong interference on the sub-band, the receiving unit Specifically used for:

The strong interference determination parameter is a channel quality indicator, and the PRB downlink channel quality indicator measurement value of the subband is used as the PRB interference measurement value of the subband, and determining that the PRB downlink CQI measurement value of the subband is not greater than a preset When the CQI threshold is set, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band; or

The strong interference determination parameter is a signal to interference and noise ratio, and the measured value of the PRB downlink signal to interference and noise ratio of the subband is used as a PRB interference measurement value of the subband, and the PRB downlink signal to interference and noise ratio of the subband is determined. When the measured value is not greater than a preset signal to interference and noise ratio threshold, it is determined that there is strong interference on the subband; otherwise, it is determined that there is no strong interference on the subband; or

The strong interference determination parameter is a signal to interference ratio, and the PRB downlink signal to interference ratio measurement value of the subband is used as the PRB interference measurement value of the subband, and the PRB downlink signal to interference ratio measurement value of the subband is determined not to be If it is greater than a preset signal-to-interference ratio threshold, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band; or

The strong interference determination parameter is a dry noise ratio, and the PRB downlink dry noise ratio measurement value of the subband is used as the PRB interference measurement value of the subband, and the PRB downlink dry noise ratio measurement value of the subband is determined to be greater than Determining a strong interference on the sub-band when a preset dry-to-noise ratio threshold is determined; otherwise, determining that there is no strong interference on the sub-band; or

The strong interference determination parameter is the interference power, and the PRB downlink interference power measurement value of the subband is used as the PRB interference measurement value of the subband, and the PRB downlink interference power measurement value of the subband is determined to be greater than a preset. When the interference power threshold is exceeded, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band.

Optionally, the receiving unit is specifically configured to: when, according to the interference measurement value of the P sub-bands of the terminal side of the terminal, the M candidate positions are selected to perform the receiving processing of the downlink common channel.

Based on the PRB interference measurement value of each subband, all subbands are sorted according to the effective interference value of the subband from small to large, and M subbands with the smallest effective interference value are selected, and the preset frequency domain candidate positions are selected. Corresponding M candidate locations are received, and the downlink common channel receiving process is performed on the M candidate locations at the sending moment, where the downlink common channel includes a PSS, an SSS, and a PBCH, where the PBCH carries the indication center frequency point The field of the number.

Optionally, based on the PRB interference measurement value of each subband, when all the subbands are sorted according to the effective interference value of the subband, the receiving unit is specifically configured to:

The strong interference determination parameter is CQI, and all subbands are sorted according to the PRB downlink CQI measurement values of the subbands from large to small;

The strong interference determination parameter is a signal to interference and noise ratio, and all subbands are sorted according to the measured value of the PRB downlink signal to interference and noise ratio of the subband from large to small;

The strong interference determination parameter is a signal to interference ratio, and all subbands are sorted according to the PRB downlink signal to interference ratio measurement values of the subbands from large to small;

The strong interference determination parameter is a dry-to-noise ratio, and all sub-bands are sorted according to the measured value of the PRB downlink dry-to-noise ratio of the sub-band from small to large;

The strong interference determination parameter is interference power, and all sub-bands are sorted according to the PRB downlink interference power measurement values of the sub-bands from small to large.

A network side device includes:

A processor for reading a program in the memory, performing the following process:

Obtaining an average interference level difference value of the user equipment according to the network side interference measurement value obtained by the self measurement and the terminal side interference level indication information reported by the user equipment; determining whether the average interference level difference value exceeds the set first threshold value; if yes, Then, the preset frequency domain candidate positions are grouped, and the downlink common channel is sent through the transceiver in each candidate location group by using a frequency hopping method at the sending time; otherwise, the network side interference measurement value based on the self measurement is preset. N candidate locations are selected from the frequency domain candidate locations, and the downlink common channel is transmitted through the transceiver at N candidate locations at the transmission time.

A transceiver for receiving and transmitting data under the control of a processor.

In this way, by using a plurality of alternate frequency points to transmit the downlink common channel, the interference problem and the artificial malicious interference problem of other communication systems in the same frequency band are solved, and the resource mapping position for the frequency domain is effectively fixed at a fixed position of the full bandwidth. The interference of the channel.

Optionally, the processor is further configured to:

In the pre-processing stage, P frequency domain candidate locations are mapped within the access frequency range according to the available bandwidth of the system;

Optionally, when mapping P frequency domain candidate locations within the access frequency range according to the available bandwidth of the system, the processor is specifically configured to:

Optionally, when the interference measurement value obtained by the self-measurement and the terminal-side interference level indication information reported by the user equipment are used to obtain the average interference level difference value of the user equipment, the processor is specifically configured to:

For each subband, the PRB interference measurement value of the subband is obtained according to the strong interference judgment parameter of the subband, wherein the PRB interference measurement value of the subband is an average interference measurement value of all PRBs on the subband;

If the PRB interference measurement value of the sub-band meets a preset condition, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band;

According to whether there is strong interference on each subband, the network side interference level indication information is obtained, and the terminal side interference level indication information reported by all user equipments accessed by the current system is obtained, based on the terminal side interference level indication information on all user equipments and the The network side interference level indicates information, and the average interference level difference value of the user equipment is obtained.

Optionally, if the PRB interference measurement value of the sub-band meets a preset condition, determining that there is strong interference on the sub-band; otherwise, when determining that there is no strong interference on the sub-band, the processor is specifically configured to:

The strong interference determination parameter is a channel quality indicator, and the PRB uplink channel quality indicator measurement value of the subband is used as the PRB interference measurement value of the subband, and the measured PRB uplink channel quality indicator measurement value of the subband is not greater than a preset value. When the channel quality indicates a threshold, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band; or

The strong interference judgment parameter is the signal to interference and noise ratio, and the measured value of the PRB uplink signal to interference and noise ratio of the subband is used as the PRB interference measurement value of the subband, and the measured value of the PRB uplink signal to interference and noise ratio of the subband is determined not to be greater than When the set signal to noise ratio threshold is set, it is determined that there is strong interference on the subband; otherwise, it is determined that there is no strong interference on the subband; or

The strong interference judgment parameter is a signal to interference ratio, and the PRB uplink signal to interference ratio measurement value of the subband is used as the PRB interference measurement value of the subband, and the PRB uplink signal to interference ratio measurement value of the subband is determined to be not greater than a preset value. When the signal-to-interference ratio is used, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band; or

The strong interference judgment parameter is a dry-to-noise ratio, and the measured value of the PRB uplink dry-to-noise ratio of the sub-band is used as the PRB interference measurement value of the sub-band, and the measured value of the PRB uplink dry-to-noise ratio of the sub-band is determined to be greater than a preset dry When the noise ratio threshold is used, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band; or

The strong interference judgment parameter is the interference power, and the PRB uplink interference power measurement value of the subband is used as the PRB interference measurement value of the subband, and the PRB uplink interference power measurement value of the subband is determined to be greater than a preset interference power threshold. When the value is determined, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band.

Optionally, the terminal side interference level indication information reported by all user equipments accessed by the current system is obtained, and the average interference level of the user equipment is obtained based on the terminal side interference level indication information and the network side interference level indication information on all user equipments. When the value is different, the processor is specifically used to:

And determining, according to the interference level indication information, a number of subbands different from the network side interference level indication information, and determining the determined subband, for the terminal side interference level indication information reported by each user equipment. Dividing the number of all sub-bands to obtain the interference level difference value of the user equipment;

Determining whether the interference level difference value of each user equipment is greater than a preset second threshold, and if yes, determining that the user equipment and the network side have different interference levels; otherwise, determining that the user equipment is at the same network side interference level;

Optionally, the preset frequency domain candidate positions are grouped, and when the downlink common channel is sent by the transceiver on each candidate location group by using a frequency hopping method, the processor is specifically configured to:

The downlink common channel is sent by the transceiver on each candidate location group by using a frequency hopping method, where the downlink common channel includes a primary synchronization channel PSS, a secondary synchronization channel SSS, and a physical broadcast channel PBCH, where the PBCH carries an indication. The field of the center frequency point number.

Optionally, the interference measurement value obtained by the self-measurement selects N candidate locations in the preset frequency domain candidate positions, and when the transmission time passes the transceiver to send the downlink common channel on the N candidate locations, the processor specifically Used for:

Based on the PRB interference measurement value of each subband, all the subbands are sorted according to the effective interference value of the subband from small to large, and the N subbands with the smallest effective interference value are selected, and the preset frequency domain candidate positions are selected. The corresponding N candidate locations are sent, and the downlink common channel is sent by the transceiver at the N candidate locations, where the downlink common channel includes a PSS, an SSS, and a PBCH, where the PBCH carries a central frequency point number. Field.

Optionally, based on the PRB interference measurement value of each subband, when all subbands are sorted according to the effective interference value of the subband from small to large, the processor is specifically configured to:

The strong interference determination parameter is a channel quality indicator, and all the sub-bands are sorted according to the measured value of the PRB uplink channel quality indicator of the sub-band from large to small;

The strong interference judgment parameter is the signal to interference and noise ratio, and all the subbands are sorted according to the measured value of the PRB uplink signal to interference and noise ratio of the subband from large to small;

The strong interference judgment parameter is a signal-to-interference ratio, and all sub-bands are sorted according to the PRB uplink signal-to-interference ratio measurement values of the sub-bands from large to small;

The strong interference judgment parameter is a dry-to-noise ratio, and all sub-bands are sorted according to the measured value of the PRB uplink dry-to-noise ratio of the sub-band from small to large;

The strong interference judgment parameter is the interference power, and all the sub-bands are sorted according to the PRB uplink interference power measurement value of the sub-band from small to large.

A user equipment includes:

Determining P frequency domain candidate locations mapped by the network side and P subbands corresponding to P frequency domain candidate locations; acquiring interference measurement values of P subbands on the terminal side, and obtaining terminal side interference level indications based on the interference measurement values of the P subbands After the information is reported to the network side, the interference measurement values of the P sub-bands on the terminal side of the terminal are selected, and the M candidate positions are selected by the transceiver 1 to perform the downlink common channel reception processing, where M and P are performed. Both are positive integers and M is less than P.

Optionally, the interference measurement value of the P subbands on the terminal side is obtained, and when the terminal side interference level indication information is obtained and reported to the network side based on the interference measurement value of the P subbands, the processor is specifically configured to:

If the PRB interference measurement value of the sub-band meets a preset condition, it is determined that there is strong interference on the sub-band; otherwise, Determining that there is no strong interference on the sub-band;

Optionally, if the PRB interference measurement value of the sub-band meets a preset condition, determining that there is strong interference on the sub-band, otherwise, when determining that there is no strong interference on the sub-band, the processor is specifically configured to:

The strong interference judgment parameter is a channel quality indicator, and the PRB downlink channel quality indicator measurement value of the subband is used as the PRB interference measurement value of the subband, and the PRB downlink CQI measurement value of the subband is determined not to be greater than a preset CQI gate. At the limit, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band; or

The strong interference judgment parameter is the signal to interference and noise ratio, and the measured value of the PRB downlink signal to interference and noise ratio of the subband is used as the PRB interference measurement value of the subband, and the measured value of the PRB downlink signal to interference and noise ratio of the subband is determined not to be greater than When the set signal to noise ratio threshold is set, it is determined that there is strong interference on the subband; otherwise, it is determined that there is no strong interference on the subband; or

The strong interference judgment parameter is a signal to interference ratio, and the PRB downlink signal to interference ratio measurement value of the subband is used as the PRB interference measurement value of the subband, and the PRB downlink signal to interference ratio measurement value of the subband is determined to be not greater than a preset value. When the signal-to-interference ratio is used, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band; or

The strong interference judgment parameter is a dry noise ratio, and the PRB downlink dry noise ratio measurement value of the subband is used as the PRB interference measurement value of the subband, and the PRB downlink dry noise ratio measurement value of the subband is determined to be greater than a preset dry When the noise ratio threshold is used, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band; or

The strong interference judgment parameter is the interference power, and the PRB downlink interference power measurement value of the subband is used as the PRB interference measurement value of the subband, and the PRB downlink interference power measurement value of the subband is determined to be greater than a preset interference power threshold. When the value is determined, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band.

Optionally, when the interference measurement of the P subbands of the terminal side of the terminal is selected, the M candidate locations are selected by the transceiver to perform the downlink common channel reception processing, and the processor is specifically configured to:

Based on the PRB interference measurement value of each subband, all subbands are sorted according to the effective interference value of the subband from small to large, and M subbands with the smallest effective interference value are selected, and the preset frequency domain candidate positions are selected. Corresponding M candidate locations are received, and the downlink common channel receiving process is performed by the transceiver at the M candidate locations, where the downlink common channel includes a PSS, an SSS, and a PBCH, where the PBCH carries the indication center frequency The field of the dot.

The strong interference judgment parameter is CQI, and all sub-bands are sorted according to the sub-band PRB downlink CQI measurement values from large to small;

The strong interference judgment parameter is the signal to interference and noise ratio, and all the subbands are sorted according to the measured value of the PRB downlink signal to interference and noise ratio of the subband from large to small;

The strong interference judgment parameter is the signal-to-interference ratio, and all sub-bands are measured according to the sub-band PRB downlink signal-to-interference ratio from large to small. Sort;

The strong interference judgment parameter is a dry-to-noise ratio, and all sub-bands are sorted according to the PRB downlink dry-to-noise ratio measurement values of the sub-bands from small to large;

The strong interference judgment parameter is the interference power, and all the sub-bands are sorted according to the PRB downlink interference power measurement values of the sub-bands from small to large.

The processor is responsible for managing the bus architecture and the usual processing, and the memory can store the data that the processor uses when performing operations.

DRAWINGS

1 is a schematic diagram showing characteristics of interference signals in the background art;

2 is a flowchart of a downlink common channel transmission according to an embodiment of the present invention;

FIG. 3 is a flowchart of receiving a downlink common channel according to an embodiment of the present invention;

4 is a schematic diagram of candidate location division according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of packet division of candidate locations according to an embodiment of the present invention; FIG.

6 is a schematic diagram of PSS/SSS/PBCH transmission according to an embodiment of the present invention;

7 and FIG. 9 are schematic diagrams showing the structure of a network side device according to an embodiment of the present invention;

8 and FIG. 10 are schematic diagrams showing the structure of a user equipment according to an embodiment of the present invention.

detailed description

The basic idea of the embodiment of the present invention is that the base station (eNB) performs selection determination according to the eNB side interference information obtained by the self measurement and the UE side interference information reported by the UE, and adaptively selects the frequency domain position of the downlink common channel to resist the downlink. Part of the frequency band interference experienced by the common channel.

The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

In the embodiment of the present invention, the PSS/SSS/PBCH downlink common channel is taken as an example, and the method for correcting channel interference in a fixed position of a full-bandwidth resource mapping location is described in detail, and the PSS/SSS/PBCH channel frequency domain is described in detail. The resource mapping location is fixed at a fixed position of the full bandwidth, and is generally fixed on the six PRBs of the central frequency point.

The LTE system has six system bandwidths, and the number of corresponding PRBs is shown in Table 1.

Table 1 - LTE system bandwidth and corresponding number of PRBs

For different system bandwidths, the center frequency is located at the center of the working frequency band, and the full bandwidth is further divided into several PRBs and subcarriers, these PRBs and subcarriers are generally divided by 180KHz and 15Khz, and one PRB contains 12 subcarriers. It should be noted that the transmission of the downlink common channel refers to mapping the downlink common channel to the corresponding resource. Signal transmission at the location.

As shown in FIG. 2, in the embodiment of the present invention, the method for transmitting a downlink common channel specifically includes:

Step 200: The network side obtains the average interference level difference value of the user equipment according to the network side interference measurement value obtained by the self measurement and the terminal side interference level indication information reported by the user equipment.

Step 201: The network side determines whether the average interference level difference value exceeds the set first threshold. If yes, step 202 is performed; otherwise, step 203 is performed.

Step 202: The network side groups the preset frequency domain candidate positions, and sequentially transmits the downlink common channel on each candidate location group by using a frequency hopping method at the sending time.

Step 203: The network side selects N candidate locations in the preset frequency domain candidate positions based on the network side interference measurement values obtained by the network measurement, and sends the downlink common channel in the N candidate locations at the sending moment.

Wherein, before step 200, that is, the system preprocessing stage, the method further includes:

The network side maps P frequency domain candidate locations within the access frequency range according to the available bandwidth of the system;

The network side divides the entire system available bandwidth into P sub-bands, wherein each sub-band contains 6 PRBs centered on one frequency domain candidate position, and P is a positive integer.

Specifically, the network side maps P frequency domain candidate positions in the access frequency range according to the available bandwidth of the system, and the specific process is: the network side according to the available bandwidth of the system, and the default frequency domain sending position of the following common channel is used as a reference point, In the in-frequency range, P frequency domain candidate positions are determined one by one according to the set frequency domain interval.

The N frequency domain candidate locations include the PSS/SSS/PBCH default transmission locations, ie, one of the frequency domain candidate locations remains consistent with the 36.211 protocol, at the center frequency point. And, the frequency domain transmission positions of the PSS/SSS signal and the PBCH signal are set at the same position.

The determination of several other frequency domain candidate locations besides the center frequency point can be as follows:

The frequency shift is performed according to the set step size based on the center frequency point, that is, the center frequency point is used as the reference point, and a plurality of different frequency points are taken as the frequency domain candidate positions at a certain interval.

Wherein, since the PSS, SSS, and PBCH common signals are transmitted by 6 PRBs, when the step size is set, the interval between the transmission positions of every two candidate frequency domains is required to be greater than 6 PRBs. The specific step size can be set according to the high-level notification or manual configuration or self-needed setting. Preferably, the PSS/SSS/PBCH is set at an interval of M*delta_BW at the relative position of the center frequency of each LTE carrier frequency. The frequency domain candidate position, where M is a positive integer, and delta_BW=900 KHz represents the smallest candidate position frequency interval because the frequency domain bandwidth of a single PRB is considered to be 180 KHz, and the center frequency point is an integer multiple of 100 KHz. Since the frequency position of the PBCH in the same radio frame is consistent with the PSS/SSS, the PSS/SSS is inevitably present in the frequency position of the PBCH, wherein a relevant field indicating the center frequency point number is added to the PBCH to indicate the current center frequency point. Used by the UE to obtain the current center frequency for subsequent services. Receive processing.

The network side informs the UE of the actual center frequency point position by adding a related field indicating the center frequency point number in the PBCH, and the specific content is as follows:

Wherein, centerFreqNo indicates the number of the center frequency point, and is uniformly numbered from the low frequency to the high frequency in the LTE accessible frequency range.

Specifically, the network side obtains the average interference level difference value of the user equipment according to the network side interference measurement value measured by the self-measurement and the terminal side interference level indication information reported by the user equipment, where the specific process is: for each sub-band, the network side Obtaining a PRB interference measurement value of the subband according to the strong interference determination parameter of the subband, wherein the PRB interference measurement value of the subband is an average interference measurement value of all PRBs on the subband; if the subband has PRB interference measurement If the value meets the preset condition, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band; and the network side obtains the network-side interference level indication information according to whether there is strong interference on each sub-band. Obtaining the terminal-side interference level indication information reported by all user equipments currently accessed by the system, and obtaining the average interference level difference value of the user equipment based on the terminal-side interference level indication information and the network-side interference level indication information on all user equipments.

The network side obtains the terminal side interference level indication information reported by all the user equipments that are accessed by the current system, and obtains the average interference of the user equipment based on the terminal side interference level indication information and the network side interference level indication information on all the user equipments. The horizontal difference value, the specific process is:

Step 0: for the terminal side interference level indication information reported by each user equipment, the network side determines, according to the network side interference level indication information, the number of subbands different from the user equipment interference level indication information and the network side interference level indication information, and The number of determined sub-bands is divided by the number of all sub-bands to obtain the interference level difference value of the user equipment;

Step 1: Determine whether the interference level difference value of each user equipment is greater than a preset second threshold, and if yes, determine that the user equipment and the network side have different interference levels; otherwise, determine that the user equipment and the network side have the same interference level. ;

Step 2: Determine the number of user equipments whose interference levels are not the same as the interference levels of the current system, and divide the determined number of user equipments by the total number of user equipments accessed by the current system to obtain the user equipment. The average interference level difference value.

The criterion for judging strong interference includes but is not limited to: a channel quality indicator (Channel Quality Indicator, CQI) criteria, Signal-to-Interference plus Noise Ratio (SINR) criteria, Interference over Thermal noise (IoT) criteria, Signal-to-Interference Ratio (SIR) criteria, and Interference Power (IP) guidelines. That is to say, if the criterion for strong interference is the channel quality indicator, the strong interference judgment parameter is the channel quality indicator; if the strong interference criterion is the signal to interference and noise ratio criterion, the strong interference judgment parameter is the signal dry noise. If the criterion for strong interference is the dry-to-noise ratio criterion, the strong interference judgment parameter is a dry-to-noise ratio; if the strong interference criterion is a signal-to-noise ratio criterion, the strong interference judgment parameter is a signal-to-interference ratio; If the criterion for strong interference is the interference power criterion, the strong interference determination parameter is the interference power.

The following describes the strong interference judgment criteria for subbands.

1. The strong interference judgment parameter is a channel quality indicator, and the network side uses the PRB uplink channel quality indicator measurement value of the subband as the PRB interference measurement value of the subband, and determines that the PRB uplink CQI measurement value of the subband is not greater than a preset. When the CQI threshold is determined, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band.

2. The strong interference judgment parameter is the signal to interference and noise ratio, and the measured value of the PRB uplink signal to interference and noise ratio of the subband is used as the PRB interference measurement value of the subband, and the PRB uplink signal to interference and noise ratio of the subband is determined. When the measured value is not greater than the preset signal to interference and noise ratio threshold, it is determined that there is strong interference on the subband; otherwise, it is determined that there is no strong interference on the subband.

3. The strong interference judgment parameter is a signal to interference ratio, and the network side uses the PRB uplink signal to interference ratio measurement value of the subband as the PRB interference measurement value of the subband, and determines that the PRB uplink signal to interference ratio measurement value of the subband is not If it is greater than the preset signal-to-interference ratio threshold, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band.

4. The above-mentioned strong interference judgment parameter is a dry-noise ratio, and the measured side of the PRB uplink dry-to-noise ratio of the sub-band is used as the PRB interference measurement value of the sub-band, and the measured value of the PRB uplink dry-to-noise ratio of the sub-band is determined to be greater than When the preset dry noise ratio threshold is set, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band.

5. The strong interference judgment parameter is the interference power, and the network side uses the PRB uplink interference power measurement value of the subband as the PRB interference measurement value of the subband, and determines that the PRB uplink interference power measurement value of the subband is greater than a preset. When the interference power threshold is exceeded, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band.

In step 202, the network side groups the preset frequency domain candidate positions, and sequentially transmits the downlink common channel on each candidate location group by using a frequency hopping method at the sending time, where the specific process is:

Step 0: The network side determines the frequency domain candidate location group and numbers it from 0 to N1-1, where N1 is the number of frequency domain candidate location packets, and the preset frequency domain candidate location is according to the frequency offset from the center frequency point. And numbering from 0 to P-1 with the minimum frequency offset as a reference. For each preset frequency domain candidate position Xi, calculate the remainder Y1 divided by N1, and put the corresponding frequency domain candidate position into the number. In the group of Y1, where Xi is the number of any one of the frequency domain candidate positions, Xi and N1 are positive integers.

Step 1: transmitting, by using a frequency hopping method, a downlink common channel on each candidate location group, where the downlink common channel includes a primary synchronization channel PSS, a secondary synchronization channel SSS, and a physical broadcast channel PBCH. The middle PBCH carries a field indicating the center frequency point number.

The network side interference measurement value obtained by the network side based on the self-measurement in the step 203 selects N candidate positions in the preset frequency domain candidate positions, and sends the downlink common channel in the N candidate positions at the transmission time, specifically The process is: the network side classifies the sub-bands according to the PRB interference measurement value of each sub-band, sorts the effective interference values of the sub-bands from small to large, and filters out the N sub-bands with the smallest effective interference value, from the preset frequency. Selecting a corresponding N candidate locations in the domain candidate locations, and transmitting the downlink common channel on the N candidate locations at the sending moment, where the downlink common channel includes a PSS, an SSS, and a PBCH, where the PBCH carries the indication center frequency point The field of the number.

Specifically, the network side sorts all the sub-bands according to the effective interference value of the sub-bands according to the PRB interference measurement value of each sub-band, and specifically includes the following situations:

1. The strong interference judgment parameter is a channel quality indicator, and the network side sorts all sub-bands according to the measured value of the PRB uplink channel quality indication of the sub-band from large to small.

2. The above-mentioned strong interference judging parameter is the signal to interference and noise ratio, and the network side sorts all subbands according to the measured value of the PRB uplink signal to interference and noise ratio of the subband from large to small;

3. The above-mentioned strong interference judgment parameter is a signal-to-interference ratio, and the network side sorts all sub-bands according to the measured PRB uplink signal-to-interference ratio of the sub-band from large to small;

4. The above-mentioned strong interference judgment parameter is a dry-to-noise ratio, and the network side sorts all sub-bands according to the PRB uplink dry-to-noise ratio measurement values of the sub-bands from small to large;

5. The strong interference judgment parameter is the interference power, and the network side sorts all the sub-bands according to the PRB uplink interference power measurement values of the sub-bands from small to large.

It should be noted that the network side of the embodiment of the present invention may be a base station (such as a macro base station, a home base station, etc.), an RN (relay) device, or other network side devices.

Referring to FIG. 3, the following describes a method for receiving a downlink common channel corresponding to the terminal side.

Step 300: The user equipment determines P frequency domain candidate locations mapped by the network side and P subbands corresponding to P frequency domain candidate locations.

Step 301: The user equipment acquires the interference measurement value of the P sub-bands on the terminal side, and obtains the interference measurement value of the P-sub-band based on the interference characteristics of the P sub-bands, and obtains the interference measurement information of the P-sub-band based on the terminal side. Selecting M candidate locations among the P frequency domain candidate locations for receiving the downlink common channel, where M and P are both positive integers and M is less than P.

Specifically, the user equipment obtains the interference measurement value of the P sub-bands on the terminal side, and obtains the terminal-side interference level indication information based on the interference measurement values of the P sub-bands, and reports the information to the network side. The specific process is as follows:

Step 0: For each subband, the user equipment obtains the PRB interference measurement value of the subband according to the strong interference judgment parameter of the subband, where the PRB interference measurement value of the subband is the average interference measurement value of all PRBs on the subband. .

Step1: If the PRB interference measurement value of the sub-band meets a preset condition, it is determined that there is a strong dry on the sub-band Disturbance; otherwise, it is determined that there is no strong interference on the sub-band.

Step 2: The user equipment obtains the terminal side interference level indication information and reports it to the network side according to whether there is strong interference on each sub-band.

The judgment criteria for strong interference include, but are not limited to, a channel quality indication criterion, a signal to interference and noise ratio criterion, a dry noise ratio criterion, a signal to interference ratio criterion, and an interference power criterion. That is to say, if the criterion for strong interference is the channel quality indicator, the strong interference judgment parameter is the channel quality indicator; if the strong interference criterion is the signal to interference and noise ratio criterion, the strong interference judgment parameter is the signal dry noise. If the criterion for strong interference is the dry-to-noise ratio criterion, then the above-mentioned strong interference judgment parameter is a dry-to-noise ratio; if the strong interference judgment criterion is a signal-to-interference ratio criterion, the strong interference judgment parameter is a signal-to-interference ratio; The criterion for determining interference is the interference power criterion, and the above-mentioned strong interference determination parameter is the interference power.

The following describes the strong interference judgment criteria for subbands.

1. The strong interference judgment parameter is a channel quality indicator, and the user equipment uses the PRB downlink channel quality indicator measurement value of the subband as the PRB interference measurement value of the subband, and determines that the PRB downlink CQI measurement value of the subband is not greater than a pre-determination. When the CQI threshold is set, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band.

2. The strong interference judgment parameter is a signal to interference and noise ratio, and the user equipment uses the measured value of the PRB downlink signal to interference and noise ratio of the subband as the PRB interference measurement value of the subband, and determines the PRB downlink signal to interference and noise ratio of the subband. When the measured value is not greater than the preset signal to interference and noise ratio threshold, it is determined that there is strong interference on the subband; otherwise, it is determined that there is no strong interference on the subband,

3. The strong interference judgment parameter is a signal to interference ratio, and the user equipment uses the PRB downlink signal to interference ratio measurement value of the subband as the PRB interference measurement value of the subband, and determines that the PRB downlink signal measurement value of the subband is not greater than When the preset signal-to-interference ratio threshold is set, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band.

4. The strong interference judgment parameter is a dry noise ratio, and the user equipment uses the PRB downlink dry noise ratio measurement value of the subband as the PRB interference measurement value of the subband, and determines the PRB downlink dry noise ratio measurement value of the subband. If it is greater than the preset dry noise ratio threshold, it is determined that there is strong interference on the subband; otherwise, it is determined that there is no strong interference on the subband.

5. The strong interference judgment parameter is the interference power, and the user equipment uses the PRB downlink interference power measurement value of the subband as the PRB interference measurement value of the subband, and determines that the PRB downlink interference power measurement value of the subband is greater than a preset. When the interference power threshold is exceeded, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band.

In step 301, based on the interference measurement values of the P subbands of the terminal side of the terminal, the M candidate locations are selected in the P frequency domain candidate locations for the downlink common channel reception process, where the user equipment is based on each sub With the PRB interference measurement value, all the sub-bands are sorted according to the effective interference value of the sub-band from small to large, and the M sub-bands with the smallest effective interference value are selected, and the corresponding corresponding frequency domain candidate positions are selected. And the PBCH carries a field indicating a center frequency point number, where the PBCH carries a field of the downlink common channel.

Specifically, the user equipment sorts all the sub-bands according to the effective interference value of the sub-bands according to the PRB interference measurement value of each sub-band, and specifically includes the following situations:

1. The strong interference judgment parameter is a channel quality indicator, and the user equipment sorts all sub-bands according to the sub-band PRB downlink CQI measurement values from large to small.

2. The above-mentioned strong interference judgment parameter is a signal dry-to-noise ratio, and the user equipment sorts all sub-bands according to the measured value of the sub-band PRB downlink signal dry-to-noise ratio from large to small.

3. The strong interference judgment parameter is a signal-to-interference ratio, and the user equipment sorts all sub-bands according to the measured PRB downlink signal-to-interference ratio of the sub-band from large to small.

4. The above-mentioned strong interference judgment parameter is a dry-to-noise ratio, and the user equipment sorts all sub-bands according to the sub-band PRB downlink dry-to-noise ratio measurement values from small to large.

5. The strong interference judgment parameter is the interference power, and the user equipment sorts all the sub-bands according to the sub-band PRB downlink interference power measurement values from small to large.

The following describes the evolved base station (eNB) by the network side device.

eNB side processing steps:

Step 0: The eNB maps P frequency domain candidate positions in the LTE access frequency range, and divides the entire system bandwidth into P sub-bands. Each sub-band is defined to include one or more PRBs. Preferably, the recommended sub-band corresponds to There are a total of 6 PRBs left and right at the center of the alternate frequency domain.

Step1: The eNB uses the interference judgment criterion to determine whether there is strong interference on each sub-band based on the interference measurement value, and performs sub-band reordering according to the effective interference value from small to large.

The interference measurement value of the eNB includes, but is not limited to, the following five types: an uplink CQI, an uplink signal to interference and noise ratio (SINR), an uplink signal to interference ratio (SIR), an uplink to interference and noise ratio (IoT), and an uplink interference power IP, where an uplink channel for interference measurement is used. / Signals include, but are not limited to, Physical Uplink Shared Channel (PUSCH), Physical Uplink Control Channel (PUCCH), Sounding Reference Signal (SRS), Physical Random Access Channel (Physical Random Access Channel, PRACH) and idle subframe.

The interference judgment criteria corresponding to the five interference measurement values of the eNB are as follows:

When the interference measurement value is determined as the CQI measurement value, it is determined whether the uplink CQI measurement value on a certain sub-band is less than a predefined CQI threshold value. If yes, it is determined that there is strong interference on the sub-band, otherwise, there is no strong interference.

When the interference measurement value is determined as the SINR measurement value, it is determined whether the uplink SINR measurement value on a certain sub-band is less than a predefined SINR threshold value. If yes, it is determined that there is strong interference on the sub-band, otherwise, there is no strong interference.

When the interference measurement value is determined as the SIR measurement value, it is determined whether the uplink SIR measurement value on a certain sub-band is smaller than a predefined SIR threshold value. If yes, it is determined that there is strong interference on the sub-band, otherwise, there is no strong interference.

When determining the interference measurement value as the IoT measurement value, it is determined whether the uplink IoT measurement value on a certain sub-band is greater than a predefined IoT threshold value. If yes, it is determined that there is strong interference on the sub-band, otherwise, there is no strong interference.

When determining that the interference measurement value is an IP measurement value, determining whether the uplink IP measurement value on a certain sub-band is greater than a predefined The IP threshold, if yes, determines that there is strong interference on the subband, otherwise there is no strong interference.

Preferably, when the eNB performs sub-band reordering according to the effective interference value, the uplink CQI, the uplink signal to interference and noise ratio (SINR), the uplink signal to interference ratio SIR, the uplink dry/noise ratio IoT, and the uplink interference power IP are five types. Interference measurements are sorted separately:

When determining the interference measurement value as the CQI measurement value, all the sub-bands are sorted in descending order of the uplink CQI, and if there are the same values, the sub-band numbers are in the order of small to large.

When the interference measurement value is determined as the SINR measurement value, all the sub-bands are sorted in descending order of the uplink SINR, and if there are the same values, the sub-band numbers are in the order of small to large.

When the interference measurement value is determined as the SIR measurement value, all the sub-bands are sorted in descending order of the uplink SIR, and if there are the same values, the sub-band numbers are in the order of small to large.

When determining the interference measurement value as the IoT measurement value, all the sub-bands are sorted in the order of the uplink IoT from small to large, and if there are the same values, the sub-band numbers are in the order of small to large.

When determining the interference measurement value as the IP measurement value, all the sub-bands are sorted in the order of the uplink IP from small to large, and if there are the same values, the sub-band numbers are in the order of small to large.

Step 2: The eNB determines the interference indication information on the network side. Preferably, the eNB determines the interference in the sub-band. The bit 0 indicates that there is no strong interference on the sub-band, and the bit 1 indicates the sub-band. There is strong interference.

Step 3: The eNB determines an average interference level difference value of all UEs accessed in the current cell, where the average interference level difference value of the UE in the cell is defined as the number of UEs and intra-cell access that are different from the interference level of the eNB in the cell. The proportion of all UEs.

Specifically, the specific process of determining, by the eNB, the interference level of a certain UE and the eNB is: determining a difference of interference indication between a certain UE and an eNB in all subbands; determining a difference ratio of interference indications of a certain UE and an eNB in all subbands Whether it exceeds M1% (M1 is a set positive number). If it exceeds, the interference level of the UE and the eNB is considered to be different. Otherwise, the interference level of the UE and the eNB side is considered to be the same. The difference ratio is defined as the ratio of the number of subbands with different interference indication bits to the number of all subbands.

Step 4: The eNB determines whether the average interference level difference value exceeds M2% (M2 is a set positive number). If it exceeds, it is considered that the average interference level of the eNB and the UE in the current cell is different, and the process proceeds to Step 5; otherwise, the eNB and the local cell are considered. The average interference level of the UEs is the same, and enters Step 6.

Step 5: Performing the first transmission scheme, that is, the eNB divides all frequency domain locations into several candidate packets, sequentially traverses all candidate packets by using a sequential frequency hopping transmission manner, and simultaneously maps the downlink common channel PSS/SSS/PBCH to the current The candidate for the frequency domain candidate corresponding to the candidate packet enters Step 7.

Step 6: Perform a second transmission scheme, that is, the eNB selects the first N_min1 subband frequency domain location based on the sub-bands after the Step1 sorting, and simultaneously maps the PSS/SSS/PBCH in the selected N_min1 frequency domain locations, and enters Step7, where N_min1 is a set positive integer.

Step 7: Perform signal processing according to the LTE downlink signal processing procedure, and the network side device operation ends.

For the user terminal (ie UE) side, regardless of which transmission scheme the base station transmits to the PSS/SSS/PCBH, the following operations are performed:

Step 1: Determine P frequency domain candidate positions mapped on the network side and P sub-bands corresponding to P frequency domain candidate positions.

Step 2: The UE obtains the terminal side interference level indication information based on the self-interference measurement value, and reports the terminal side interference level indication information to the network side, and performs sub-band reordering according to the effective interference value from small to large.

The interference measurement value of the UE includes, but is not limited to, the following five types: a downlink CQI, a downlink signal to interference and noise ratio (SINR), a downlink signal to interference ratio (SIR), a downlink to interference and noise ratio (IoT), and a downlink interference power (IP).

The reporting method corresponding to the five types of interference measurement values of the UE is: the downlink CQI is reported by the PUSCH/PUCCH, and the newly defined interference measurement values (downstream SINR, downlink SIR, downlink IoT, and downlink IP) are reported by using the PUSCH.

The interference judgment criterion corresponding to the five interference measurement values of the UE is the same as the interference judgment criterion of the five interference measurement values on the network side.

The interference judgment criteria corresponding to the five interference measurement values of the UE are as follows:

When the interference measurement value is determined as the CQI measurement value, it is determined whether the downlink CQI measurement value on a certain sub-band is less than a predefined CQI threshold value. If yes, it is determined that there is strong interference on the sub-band, otherwise, there is no strong interference.

When the interference measurement value is determined as the SINR measurement value, it is determined whether the downlink SINR measurement value on a certain sub-band is smaller than a predefined SINR threshold value. If yes, it is determined that there is strong interference on the sub-band, otherwise, there is no strong interference.

When the interference measurement value is determined as the SIR measurement value, it is determined whether the downlink SIR measurement value on a certain sub-band is less than a predefined SIR threshold value. If yes, it is determined that there is strong interference on the sub-band, otherwise, there is no strong interference.

When determining the interference measurement value as the IoT measurement value, it is determined whether the downlink IoT measurement value on a certain sub-band is greater than a predefined IoT threshold value. If yes, it is determined that there is strong interference on the sub-band, otherwise, there is no strong interference.

When the interference measurement value is determined as the IP measurement value, it is determined whether the downlink IP measurement value on a certain sub-band is greater than a predefined IP threshold value. If yes, it is determined that there is strong interference on the sub-band, otherwise, there is no strong interference.

The interference indication information of the UE is indicated by using a Bitmap in units of subbands, the bit 0 indicates that there is no strong interference on the subband, and the bit 1 indicates that there is strong interference on the subband.

Preferably, when performing sub-band reordering according to the effective interference value, the UE performs the following sorting according to the downlink CQI, the downlink SINR, the downlink SIR, the downlink IoT, and the downlink IP:

When determining the interference measurement value as the CQI measurement value, all the sub-bands are sorted in descending order of the downlink CQI, and if there are the same values, the sub-band numbers are in the order of small to large.

When the interference measurement value is determined as the SINR measurement value, all the sub-bands are sorted in descending order of the downlink SINR, and if there are the same values, the sub-band numbers are in the order of small to large.

When determining the interference measurement value as the SIR measurement value, all the sub-bands are sorted in descending order of the downlink SIR, and if there are the same values, the sub-band numbers are in the order of small to large.

When determining the interference measurement value as the IoT measurement value, all the sub-bands are sorted in descending order of the downlink IoT, and if there are the same values, the sub-band numbers are in ascending order.

When determining the interference measurement value as the IP measurement value, all the sub-bands are sorted in descending order of the downlink IP. If there are the same values, the sub-band numbers are in the order of small to large.

Step 3: The UE selects the first N_min2 subband frequency domain locations based on the Step 2 sorted subbands, and performs PSS/SSS/PBCH reception processing on the N_min2 frequency domain locations, including performing demapping of the downlink common channel. Processing operations such as channel equalization, demodulation, and decoding. Where N_min2 is a positive integer greater than or equal to 1, and the UE adjusts itself according to its own capability level.

Step4: The receiving end operation ends.

In the first embodiment, the solution of the present invention is described in detail by taking an actual application scenario as an example.

In the first embodiment, the system bandwidth BW=20 MHz, the number of candidate positions=19, and M=1 are divided into four candidate groups. M1%=50%, M2%=50%, N_min1=1, N_min2=2.

Step 0: In the pre-processing stage, the network side and the user equipment negotiate and determine the candidate locations in the frequency domain.

As shown in FIG. 4, the PSS/SSS/PBCH candidate position is set at intervals of 1*delta_BW in the relative position of the center frequency of each LTE carrier frequency in the LTE access frequency range, and the available bandwidth of the system is divided into 19 sub-subsections. band. (where M = 1, delta_BW = 900 KHz represents the smallest candidate position frequency interval).

Adding a related field indicating the center frequency point number to the PBCH indicates the current center frequency point, and is used by the UE to obtain the current center frequency point for subsequent service receiving processing, as follows:

Wherein, centerFreqNo indicates the number of the center frequency point, and is uniformly numbered from the low frequency to the high frequency in the LTE accessible frequency range. As shown in Figure 3, there are a total of 19 available center frequency positions in the maximum 20 MHz range, and 5 bits are used to indicate the frequency point number. The correspondence between the value of centerFreqNo and the frequency offset is shown in Table 2.

Table 2

Step 1: The eNB uses the dry-to-noise ratio minimization criterion to determine whether there is strong interference on each sub-band based on its own uplink IoT measurement value, and performs sub-band reordering according to the order of effective interference values from small to large.

In this embodiment, the interference measurement value of the eNB adopts an uplink dry-to-noise ratio, and the uplink channel used for the interference measurement adopts an idle subframe in which the LTE uplink does not perform service transmission.

When performing strong interference judgment on a certain subband, it is necessary to determine whether the uplink IoT measurement value on a certain subband is greater than a predefined IoT threshold. If yes, it is judged that there is strong interference on the subband, otherwise, there is no strong interference.

Further, when sub-band reordering is performed according to the order of effective interference values, the uplink IoT measurement values are sorted, that is, all sub-bands are sorted according to the uplink dry-to-noise ratio IoT from small to large, if the same The values are in the order of the subband numbers from small to large.

Step 2: The eNB determines the interference indication information on the network side. Preferably, the eNB determines the interference in the sub-band. The bit 0 indicates that there is no strong interference on the sub-band, and the bit 1 indicates the sub-band. There is strong interference, as shown in Table 3.

table 3

子带编号 Subband number	11	22	33	44	55	66	77	88	99	1010
干扰指示Bit Interference indication Bit	11	11	00	00	00	00	00	00	00	00
子带编号 Subband number	1111	1212	1313	1414	1515	1616	1717	1818	1919
干扰指示Bit Interference indication Bit	00	00	00	00	00	00	00	00	00

As can be seen from Table 3, the eNB has strong interference on both the subband 1 and the subband 2.

Step 3: The eNB determines whether the average interference level difference value of all UEs accessed in the current cell exceeds M2%. (M2% takes 50%), if yes, enter Step4; otherwise, enter Step5. The specific process is as follows:

Step 3.1: Determine whether the ratio of the difference between the measurement results of the interference locations of all the sub-bands of a certain UE and the eNB exceeds M1% (M1%=50%).

Taking Table 4 as an example, it can be seen from Table 4 that UE1 has strong interference on sub-bands 1 to 12. It can be seen from the comparison between Table 3 and Table 4 that UE1 has different interference levels from sub-band 3 to sub-band 14 and eNB, and the ratio is 12/19>50%. Therefore, the interference level of UE1 and eNB is different.

Table 4 (Interference indication form of UE1)

子带编号 Subband number	11	22	33	44	55	66	77	88	99	1010
干扰指示Bit Interference indication Bit	11	11	11	11	11	11	11	11	11	11
子带编号 Subband number	1111	1212	1313	1414	1515	1616	1717	1818	1919
干扰指示Bit Interference indication Bit	11	11	11	11	00	00	00	00	00

Step 3.2: Determine whether the average interference level difference value of all UEs accessed in the current cell exceeds M2% (M2% takes 50%).

Step 4: Performing the first transmission scheme, that is, the eNB divides all frequency domain locations into several candidate packets, sequentially traverses all candidate packets by using a sequential frequency hopping transmission manner, and simultaneously maps the downlink common channel PSS/SSS/PBCH to the current The candidate for the frequency domain candidate corresponding to the candidate packet proceeds to Step 6.

For example, in this embodiment, if 20 UEs are accessed in the eNB, the interference level of 16 UEs is different from the interference level of the eNB. Therefore, the average interference level difference value of all UEs is 16/20=80. %. Determining whether the average interference level difference value (80%) of all UEs accessed in the current cell exceeds M2% (M2% takes 50%), and 80%>50%, that is, the threshold value is exceeded, and the eNB and the local cell are judged. The average interference level of the inner UE is different, and the first transmission scheme is used for the downlink common channel transmission.

The first delivery scheme is:

The eNB divides all 19 candidate candidate locations into four groups, each group containing five candidate locations, and the eNB transmits only one PSS/SSS/PBCH corresponding to one candidate position at each transmission time. The eNB traverses all 19 locations (corresponding hopping patterns) shown in FIG. 5 by using a frequency hopping transmission mode, and the eNB transmits the PSS, SSS, and PBCH at each time point according to the system frame number (SFN). Divide the specific value of the 20 remainder to determine:

If 0<=SFN mod 20<=4, the corresponding PSS, SSS and PBCH are transmitted in the first pattern position,

If 5<=SFN mod 20<=9, the corresponding PSS, SSS and PBCH are transmitted in the second pattern position;

If 10<=SFN mod 20<=14, the corresponding PSS, SSS and PBCH are transmitted in the third pattern position;

If 15<=SFN mod 20<=19, the corresponding PSS, SSS and PBCH are transmitted in the fourth pattern position, where SFN represents the system frame number.

Step 5: Perform a second transmission scheme, that is, the eNB selects the first N_min1 subband frequency domain location based on the sub-bands after the Step1 sorting, and simultaneously maps the PSS/SSS/PBCH in the selected N_min1 frequency domain locations, and enters Step6, where N_min1 is a set positive integer.

For example, in this embodiment, if 20 UEs are accessed in the eNB, the interference level of one UE is different from the interference level of the eNB. Therefore, the average interference level difference value of all UEs is 1/20=5. %. Determining whether the average interference level difference value (5%) of all UEs accessed in the current cell exceeds M2% (50%), and 5% <50%, that is, the threshold value is not exceeded, and determining the eNB and the UE in the current cell The average interference level is the same, and the second transmission scheme is used for the downlink common channel transmission.

The second transmission scheme is: the eNB selects the first N_min1=1 subband frequency domain location based on the Step1 sorted subband, and simultaneously maps the PSS/SSS/PBCH in the selected N_min1 frequency domain locations.

Referring to FIG. 6, the eNB selects a candidate location with a frequency offset of -7.2 MHz from among 19 frequency domain candidate locations, and transmits PSS, SSS, and PBCH at the frequency domain location.

Step 6: The signal processing is performed according to the LTE downlink signal processing procedure, and the network side device operation ends.

UE side processing steps:

Step 7: The UE obtains the terminal side interference level indication information based on the interference measurement value, and reports the terminal side interference level indication information to the network side, and performs subband reordering according to the effective interference value from small to large.

When performing strong interference judgment on a certain subband, it is necessary to determine whether the downlink IoT measurement value on a certain subband is greater than a predefined IoT threshold. If yes, it is judged that there is strong interference on the subband, otherwise, there is no strong interference. Here, the sub-band is used as a unit to indicate by Bitmap. Bit 0 indicates that there is no strong interference on the subband, and bit 1 indicates that there is strong interference on the subband.

Further, when the sub-band reordering is performed according to the order of the effective interference values, the sub-bands are sorted according to the downlink IoT measurement values, that is, all the sub-bands are sorted according to the descending I/T ratio from small to large, if the same The values are in the order of the subband numbers from small to large.

Step 8: The UE selects the first N_min2 (N_min2 takes 2) sub-band frequency domain positions based on the sub-bands sorted by Step2, and performs reception processing of PSS, SSS, and PBCH in the two frequency domain positions.

In this embodiment, the two frequency domain positions are a frequency offset of -7.2 MHz and a frequency offset of 7.2 MHz, respectively, and the UE performs reception processing of PSS, SSS, and PBCH in sequence in the two frequency domain positions.

Based on the foregoing embodiment, referring to FIG. 7, in the embodiment of the present invention, a downlink common channel sending apparatus is further provided, including: an obtaining unit 70, a determining unit 71, a first processing unit 72, and a second processing unit 73. And mapping unit 74, wherein:

The obtaining unit 70 is configured to obtain, according to the network-side interference measurement value obtained by the self-measurement and the terminal-side interference level indication information reported by the user equipment, an average interference level difference value of the user equipment;

The determining unit 71 is configured to determine whether the average interference level difference value exceeds a set first threshold;

The first processing unit 72 is configured to group the preset frequency domain candidate positions, and sequentially send the downlink common channel on each candidate location group by using a frequency hopping method at the sending time;

The second processing unit 73 is configured to select N candidate locations in the preset frequency domain candidate positions based on the network side interference measurement values obtained by the self measurement, and send the downlink common channel in the N candidate locations at the transmission time.

Optionally, further comprising:

The mapping unit 74 is configured to: in the pre-processing stage, map P frequency domain candidate locations within the access frequency range according to the available bandwidth of the system;

Optionally, when mapping P frequency domain candidate locations in the access frequency range according to the available bandwidth of the system, the mapping unit 74 is specifically configured to:

Optionally, when the interference measurement value obtained by the self-measurement and the terminal-side interference level indication information reported by the user equipment are used to obtain the average interference level difference value of the user equipment, the obtaining unit 70 is specifically configured to:

Optionally, if the measured value of the PRB interference of the sub-band meets a preset condition, determining that there is strong interference on the sub-band; otherwise, determining that there is no strong interference on the sub-band, the obtaining unit 70 is specifically configured to:

The strong interference judgment parameter is a signal to interference ratio, and the PRB uplink signal to interference ratio measurement value of the subband is used as the PRB of the subband. Disturbing the measured value, and determining that the PRB uplink signal to interference ratio measurement value of the subband is not greater than a preset signal to interference ratio threshold, determining that there is strong interference on the subband; otherwise, determining that the subband does not exist Strong interference; or

Optionally, the terminal side interference level indication information reported by all user equipments accessed by the current system is obtained, and the average interference level of the user equipment is obtained based on the terminal side interference level indication information and the network side interference level indication information on all user equipments. When the value is different, the obtaining unit 70 is specifically configured to:

Determining, according to the interference level indication information, a number of subbands different from the network side interference level indication information, and determining the determined subbands, according to the interference level indication information reported by each user equipment The number is divided by the number of all sub-bands to obtain the interference level difference value of the user equipment;

Determining whether the interference level difference value of each user equipment is greater than a preset second threshold, and if yes, determining that the user equipment and the network side have different interference levels; otherwise, determining that the user equipment and the network side have the same interference level;

Optionally, the first processing unit 72 is specifically configured to: when the downlink common channel is sent on each candidate location group by using a frequency hopping method, and the first processing unit 72 is specifically configured to:

The downlink common channel is sequentially transmitted on each candidate location group by using a frequency hopping method, where the downlink common channel includes a primary synchronization channel PSS, a secondary synchronization channel SSS, and a physical broadcast channel PBCH, where the PBCH carries the indication center frequency point. The field of the number.

Optionally, the interference measurement value obtained by the self-measurement selects N candidate locations in the preset frequency domain candidate positions, and when the downlink common channel is sent on the N candidate locations at the transmission time, the second processing unit 73 specifically Used for:

Based on the PRB interference measurement value of each subband, all the subbands are sorted according to the effective interference value of the subband from small to large, and the N subbands with the smallest effective interference value are selected, and the preset frequency domain candidate positions are selected. Corresponding N candidate locations, and transmitting a downlink common channel at the N candidate locations at a sending moment, where the downlink common channel The PSS, the SSS, and the PBCH are included, wherein the PBCH carries a field indicating a center frequency point number.

Optionally, based on the PRB interference measurement value of each subband, when all the subbands are sorted according to the effective interference value of the subband from small to large, the second processing unit 73 is specifically configured to:

Based on the foregoing embodiment, referring to FIG. 8, in the embodiment of the present invention, a receiving apparatus for a downlink common channel is further provided, including: a determining unit 80 and a receiving unit 81, where:

a determining unit 80, configured to determine P frequency domain candidate locations mapped by the network side and P subbands corresponding to P frequency domain candidate locations;

The receiving unit 81 is configured to acquire the interference measurement values of the P subbands on the terminal side, and obtain the terminal side interference level indication information based on the interference measurement values of the P subbands, and report the interference to the network side based on the interference of the P subbands on the terminal side. The measured value selects M candidate positions among the P frequency domain candidate positions for receiving processing of the downlink common channel, where M and P are both positive integers, and M is smaller than P.

Optionally, the interference measurement value of the P sub-bands on the terminal side is obtained, and the terminal-side interference level indication information is obtained and reported to the network side based on the interference measurement value of the P sub-bands, and the receiving unit 81 is specifically configured to:

Optionally, if the measured value of the PRB interference of the sub-band meets the preset condition, determining that there is strong interference on the sub-band, otherwise, determining that there is no strong interference on the sub-band, the receiving unit 81 is specifically configured to:

Optionally, the receiving unit 81 is specifically configured to: when, according to the interference measurement value of the P subbands of the terminal side of the terminal, the M candidate locations are selected to perform the reception processing of the downlink common channel.

Based on the PRB interference measurement value of each subband, all subbands are sorted according to the effective interference value of the subband from small to large, and M subbands with the smallest effective interference value are selected, and the preset frequency domain candidate positions are selected. Corresponding M candidate locations are received, and the downlink common channel receiving process is performed on the M candidate locations at the sending time, where the downlink common channel includes a PSS, an SSS, and a PBCH, where the PBCH carries a central frequency point number Field.

Optionally, based on the PRB interference measurement value of each subband, when all subbands are sorted according to the effective interference value of the subband from small to large, the receiving unit 81 is specifically configured to:

The strong interference judgment parameter is a signal-to-interference ratio, and all sub-bands are sorted according to the PRB downlink signal-to-interference ratio measurement values of the sub-bands from large to small;

Based on the foregoing embodiment, referring to FIG. 9, in the embodiment of the present invention, the network side device includes:

The processor 900 is configured to read a program in the memory 920 and perform the following process:

Obtaining an average interference level difference value of the user equipment according to the network side interference measurement value obtained by the self measurement and the terminal side interference level indication information reported by the user equipment; determining whether the average interference level difference value exceeds the set first threshold value; if yes, Then, the preset frequency domain candidate positions are grouped, and the downlink common channel is sequentially sent by the transceiver 910 on each candidate location group by using a frequency hopping method at the transmission time; otherwise, the network side interference measurement value obtained based on the self measurement is in advance. N candidate locations are selected from the frequency domain candidate locations, and the downlink common channel is transmitted by the transceiver 910 at the N candidate locations at the transmission time.

The transceiver 910 is configured to receive and transmit data under the control of the processor 900.

In this way, by using a plurality of alternate frequency points to transmit the downlink common channel, the interference problem and the artificial malicious interference problem of other communication systems in the same frequency band are solved, and the resource mapping position for the frequency domain is effectively fixed at a fixed position of the full bandwidth. The channel is subject to interference.

Optionally, the processor 900 is further configured to:

Optionally, when mapping P frequency domain candidate locations in the access frequency range according to the available bandwidth of the system, the processor 900 is specifically configured to:

Optionally, when the interference measurement value obtained by the self-measurement and the terminal-side interference level indication information reported by the user equipment are used to obtain the average interference level difference value of the user equipment, the processor 900 is specifically configured to:

Optionally, if the PRB interference measurement value of the sub-band meets a preset condition, determining that there is strong interference on the sub-band; otherwise, determining that there is no strong interference on the sub-band, the processor 900 is specifically configured to:

Optionally, the terminal side interference level indication information reported by all user equipments accessed by the current system is obtained, and the average interference level difference value of the user equipment is obtained based on the terminal side interference level indication information and the interference level indication information on all user equipments. The processor 900 is specifically configured to:

Optionally, the processor 900 is specifically configured to: when the downlink common channel is sent by the transceiver 910 in each of the candidate location packets by using a frequency hopping manner, and the processor 900 is specifically configured to:

The downlink common channel is sent by the transceiver 910 on each candidate location group by using a frequency hopping method, where the downlink common channel includes a primary synchronization channel PSS, a secondary synchronization channel SSS, and a physical broadcast channel PBCH. The PBCH carries a field indicating a center frequency point number.

Optionally, the interference measurement value obtained by the self-measurement selects N candidate locations among the preset frequency domain candidate positions, and when the downlink common channel is sent by the transceiver 910 at the N candidate locations, the processor 900 is specifically used for:

Based on the PRB interference measurement value of each subband, all the subbands are sorted according to the effective interference value of the subband from small to large, and the N subbands with the smallest effective interference value are selected, and the preset frequency domain candidate positions are selected. Corresponding N candidate locations are transmitted, and the downlink common channel is sent by the transceiver 910 at the N candidate locations, where the downlink common channel includes a PSS, an SSS, and a PBCH, where the PBCH carries the indication center frequency point number. Field.

Optionally, based on the PRB interference measurement value of each subband, when all subbands are sorted according to the effective interference value of the subband from small to large, the processor 900 is specifically configured to:

In FIG. 9, the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 900 and various circuits of memory represented by memory 920. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. Transceiver 910 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium. The processor 900 is responsible for managing the bus architecture and general processing, and the memory 920 can store data used by the processor 900 in performing operations.

Based on the foregoing embodiment, referring to FIG. 10, in the embodiment of the present invention, the user equipment includes:

The processor 100 is configured to read a program in the memory 120 and perform the following process:

Determining P frequency domain candidate locations mapped by the network side and P subbands corresponding to P frequency domain candidate locations; acquiring interference measurement values of P subbands on the terminal side, and obtaining terminal side interference level indications based on the interference measurement values of the P subbands After the information is reported to the network side, the interference measurement values of the P subbands on the terminal side of the terminal are selected, and the M candidate locations are selected by the transceiver 110 to perform downlink common channel reception processing, where M and P are performed. Positive Number, and M is less than P.

In this way, by adopting the reception of the downlink common channel for multiple alternate frequency points, the interference problem and the artificial malicious interference problem of other communication systems in the same frequency band are solved, and the fixed resource mapping position for the frequency domain is fixed at the full bandwidth. The channel of the location is subject to interference.

Optionally, the interference measurement value of the P subbands on the terminal side is obtained, and when the terminal side interference level indication information is obtained and reported to the network side based on the interference measurement value of the P subbands, the processor 100 is specifically configured to:

Optionally, if the measured value of the PRB interference of the sub-band meets the preset condition, determining that there is strong interference on the sub-band, otherwise, determining that there is no strong interference on the sub-band, the processor 100 is specifically configured to:

Optionally, the processor 100 is specifically configured to: when the M-th candidate position is selected by the transceiver 110 to perform the downlink common channel receiving process, based on the interference measurement of the P-sub-bands of the terminal side of the terminal, the processor 100 is specifically configured to:

Based on the PRB interference measurement value of each subband, all subbands are sorted according to the effective interference value of the subband from small to large, and M subbands with the smallest effective interference value are selected, and the preset frequency domain candidate positions are selected. Corresponding M candidate locations are received, and downlink common channel reception is performed by the transceiver 110 at the M candidate locations at the transmission time. Processing, where the downlink common channel includes a PSS, an SSS, and a PBCH, where the PBCH carries a field indicating a center frequency point number.

Optionally, based on the PRB interference measurement value of each subband, when all subbands are sorted according to the effective interference value of the subband from small to large, the processor 100 is specifically configured to:

The transceiver 110 is configured to receive and transmit data under the control of the processor 100.

Wherein, in FIG. 10, the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 100 and various circuits of memory represented by memory 120. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. Transceiver 110 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium. For different user equipments, the user interface 130 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

The processor 100 is responsible for managing the bus architecture and general processing, and the memory 120 can store data used by the processor 100 in performing operations.

In summary, in the embodiment of the present invention, the network side obtains the average interference level difference value of the user equipment according to the network side interference measurement value and the terminal side interference level indication information; and determines whether the average interference level difference value exceeds the set first. Threshold; if yes, grouping the preset frequency domain candidate positions, and sequentially transmitting the downlink common channel on each candidate location group by using a frequency hopping method at the transmission time; otherwise, selecting N candidates in the preset frequency domain candidate positions Positioning, and transmitting the downlink common channel at the N candidate locations at the time of transmission, thus solving the interference problem and the artificial malicious interference problem of other communication systems in the same frequency band, effectively reducing the resource mapping position fixed for the frequency domain Interference from a fixed-band channel at full bandwidth.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Thus, the present invention can be implemented in an entirely hardware embodiment, an entirely software embodiment, or in combination with software and hardware. The form of the case. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

While the preferred embodiment of the invention has been described, it will be understood that Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the invention without departing from the spirit and scope of the embodiments of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the embodiments of the invention.

Claims

A method for transmitting a downlink common channel, comprising:

The network side obtains the average interference level difference value of the user equipment according to the network side interference measurement value obtained by the self measurement and the terminal side interference level indication information reported by the user equipment;

The network side determines whether the average interference level difference value exceeds a set first threshold;

If yes, the network side groups the preset frequency domain candidate positions, and sequentially transmits the downlink common channel on each candidate location group by using a frequency hopping method at the sending time;

Otherwise, the network side selects N candidate locations in the preset frequency domain candidate positions based on the measured network side interference measurement values, and sends the downlink common channel in the N candidate locations at the sending moment.
The method of claim 1 further comprising:

In the pre-processing stage, the network side maps P frequency domain candidate locations within the access frequency range according to the available bandwidth of the system;

The network side divides the entire system available bandwidth into P subbands, wherein each subband is centered on one frequency domain candidate location and includes 6 PRBs, and P is a positive integer.
The method according to claim 2, wherein the network side maps P frequency domain candidate locations in the access frequency range according to the available bandwidth of the system, and specifically includes:

The network side determines, according to the available bandwidth of the system, a default frequency domain transmission location of the following common channel as a reference point, and determines P frequency domain candidate locations one by one according to the set frequency domain interval within the access frequency range.
The method according to claim 2 or 3, wherein the network side obtains the average interference level difference value of the user equipment according to the network side interference measurement value obtained by the self measurement and the terminal side interference level indication information reported by the user equipment, which specifically includes :

For each subband, the network side obtains a PRB interference measurement value of the subband according to the strong interference determination parameter of the subband, where the PRB interference measurement value of the subband is all PRBs on the subband. Average interference measurement;

If the PRB interference measurement value of the sub-band meets a preset condition, determining that there is strong interference on the sub-band; otherwise, determining that there is no strong interference on the sub-band;

The network side obtains the network side interference level indication information according to whether there is strong interference on each subband, and obtains the terminal side interference level indication information reported by all the user equipments accessed by the current system, based on the terminal side interference level on all the user equipments. The indication information and the network side interference level indication information obtain an average interference level difference value of the user equipment.
The method according to claim 4, wherein if the PRB interference measurement value of the sub-band conforms to a preset condition, determining that there is strong interference on the sub-band; otherwise, determining that the sub-band is not There are strong interferences, including:

The strong interference determination parameter is a channel quality indicator, and the network side uses the PRB uplink channel quality indicator of the subband Determining that the measured value is used as the PRB interference measurement value of the subband, and determining that the PRB uplink channel quality indicator measurement value of the subband is not greater than a preset channel quality indication threshold value, determining that the subband exists Strong interference; otherwise, it is determined that there is no strong interference on the sub-band; or

The strong interference determination parameter is a signal to interference and noise ratio, and the network side uses the PRB uplink signal to interference and noise ratio measurement value of the subband as a PRB interference measurement value of the subband, and determines a PRB uplink of the subband. When the signal to interference and noise ratio measurement value is not greater than a preset signal to interference and noise ratio threshold value, it is determined that there is strong interference on the subband; otherwise, it is determined that there is no strong interference on the subband; or

The strong interference determination parameter is a signal to interference ratio, and the network side uses the PRB uplink signal to interference ratio measurement value of the subband as a PRB interference measurement value of the subband, and determines a PRB uplink signal of the subband. If the measured value is not greater than a preset signal-to-interference ratio threshold, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band; or

The strong interference determination parameter is a dry noise ratio, and the network side uses the PRB uplink dry noise ratio measurement value of the subband as a PRB interference measurement value of the subband, and determines a PRB uplink dry noise of the subband. If the measured value is greater than a preset dry noise ratio threshold, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band; or

The strong interference determination parameter is the interference power, and the network side uses the PRB uplink interference power measurement value of the subband as the PRB interference measurement value of the subband, and determines the PRB uplink interference power measurement value of the subband. When the interference power threshold is greater than the preset, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band.
The method according to claim 4, wherein the network side acquires terminal side interference level indication information reported by all user equipments accessed by the current system, based on terminal side interference level indication information on all user equipments, and the method The network side interference level indication information is obtained by the average interference level difference value of the user equipment, and specifically includes:

And determining, by the network side, the number of subbands different from the network side interference level indication information, and the network side interference level indication information, based on the network side interference level indication information, And dividing the determined number of sub-bands by the number of all sub-bands to obtain a difference value of the interference level of the user equipment;

Determining whether the interference level difference value of each user equipment is greater than a preset second threshold, and if yes, determining that the user equipment and the network side have different interference levels; otherwise, determining that the user equipment and the network side have the same interference level ;

Determine the number of user equipments that are not in the same level as the interference level on the network side of the current system, and divide the determined number of user equipments by the total number of user equipments accessed by the current system to obtain the difference in the average interference level of the user equipment. value.
The method according to claim 6, wherein the network side groups the preset frequency domain candidate positions, and sequentially transmits the downlink common channel on each candidate location group by using a frequency hopping method at the sending time, which specifically includes:

The network side determines frequency domain candidate location packets and numbers them from 0 to N1-1, where N1 is the number of frequency domain candidate location packets, and the frequency offset of the preset frequency domain candidate locations according to the distance from the center frequency point. Frequency offset The minimum value is numbered from 0 to P-1 as a reference. For each of the preset frequency domain candidate positions Xi, the remainder Y1 obtained by dividing Xi by N1 is calculated, and the corresponding frequency domain candidate position is placed in the group numbered Y1. Where Xi is the number of any one of the frequency domain candidate positions, and Xi, N1 are positive integers;

The downlink common channel is sequentially transmitted on each candidate location group by using a frequency hopping method, where the downlink common channel includes a primary synchronization channel PSS, a secondary synchronization channel SSS, and a physical broadcast channel PBCH, where the PBCH carries the indication center frequency. The field of the dot.
The method according to claim 6, wherein the network side selects N candidate locations among the preset frequency domain candidate positions based on the network side interference measurement values obtained by the self measurement, and the N candidates at the transmission time. Sending a downlink common channel at a location, specifically including:

Based on the PRB interference measurement value of each subband, the network side sorts all subbands according to the effective interference value of the subbands, and filters out the N subbands with the smallest effective interference value, from the preset frequency domain candidate positions. Selecting a corresponding N candidate locations, and transmitting a downlink common channel at the N candidate locations, where the downlink common channel includes a PSS, an SSS, and a PBCH, where the PBCH carries the indication center frequency point number Field.
The method according to claim 8, wherein the network side sorts all the sub-bands according to the effective interference value of the sub-bands according to the PRB interference measurement value of each sub-band, and specifically includes:

The strong interference determination parameter is a channel quality indicator, and the network side sorts all sub-bands according to the PRB uplink channel quality indication measurement value of the sub-band from large to small;

The strong interference determination parameter is a signal to interference and noise ratio, and the network side sorts all subbands according to the PRB uplink signal to interference and noise ratio measurement values of the subbands from large to small;

The strong interference determination parameter is a signal-to-interference ratio, and the network side sorts all sub-bands according to the PRB uplink signal-to-interference ratio measurement values of the sub-bands from large to small;

The strong interference determination parameter is a dry-to-noise ratio, and the network side sorts all sub-bands according to the measured value of the PRB uplink dry-to-noise ratio of the sub-band from small to large;

The strong interference judgment parameter is the interference power, and the network side sorts all the sub-bands according to the PRB uplink interference power measurement values of the sub-bands from small to large.
A method for receiving a downlink common channel, comprising:

The user equipment determines P frequency domain candidate locations mapped by the network side and P subbands corresponding to P frequency domain candidate locations;

The user equipment acquires the interference measurement value of the P subbands on the terminal side, and obtains the terminal side interference level indication information based on the interference measurement values of the P subbands, and reports the interference measurement based on the P subbands of the terminal side after the terminal side interference level indication information is reported to the network side. The value selects M candidate locations among the P frequency domain candidate locations for receiving processing of the downlink common channel, where M and P are both positive integers and M is less than P.
The method according to claim 10, wherein the user equipment acquires interference measurement values of the P subbands on the terminal side, and obtains terminal side interference level indication information based on the interference measurement values of the P subbands, and reports the information to the network. Side, specifically includes:

For each subband, the user equipment acquires a PRB interference measurement value of the subband according to the strong interference determination parameter of the subband, where the PRB interference measurement value of the subband is all PRBs on the subband. Average interference measurement;

If the PRB interference measurement value of the sub-band meets a preset condition, determining that there is strong interference on the sub-band; otherwise, determining that there is no strong interference on the sub-band;

The user equipment obtains the terminal side interference level indication information and reports it to the network side according to whether there is strong interference on each sub-band.
The method according to claim 11, wherein if the PRB interference measurement value of the sub-band meets a preset condition, determining that there is strong interference on the sub-band, otherwise determining that the sub-band is not There are strong interferences, including:

The strong interference determination parameter is a channel quality indicator, and the user equipment uses the PRB downlink channel quality indicator measurement value of the subband as a PRB interference measurement value of the subband, and determines a PRB downlink CQI measurement of the subband. When the value is not greater than a preset CQI threshold, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band; or

The strong interference determination parameter is a signal to interference and noise ratio, and the user equipment uses the PRB downlink signal to interference and noise ratio measurement value of the subband as a PRB interference measurement value of the subband, and determines a PRB downlink of the subband. When the signal to interference and noise ratio measurement value is not greater than a preset signal to interference and noise ratio threshold value, it is determined that there is strong interference on the subband; otherwise, it is determined that there is no strong interference on the subband; or

The strong interference determination parameter is a signal to interference ratio, and the user equipment uses the PRB downlink signal to interference ratio measurement value of the subband as a PRB interference measurement value of the subband, and determines a PRB downlink signal of the subband. If the measured value is not greater than a preset signal-to-interference ratio threshold, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band; or

The strong interference determination parameter is a dry noise ratio, and the user equipment uses the PRB downlink dry noise ratio measurement value of the subband as a PRB interference measurement value of the subband, and determines a PRB downlink dry noise of the subband. If the measured value is greater than a preset dry noise ratio threshold, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band; or

The strong interference determination parameter is the interference power, and the user equipment uses the PRB downlink interference power measurement value of the subband as the PRB interference measurement value of the subband, and determines the PRB downlink interference power measurement value of the subband. When the interference power threshold is greater than the preset, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band.
The method according to claim 11 or 12, wherein the M candidate positions are selected among the P frequency domain candidate positions for receiving the downlink common channel based on the interference measurement values of the P subbands of the terminal side, With Body includes:

The user equipment sorts all sub-bands according to the PRB interference measurement value of each sub-band according to the effective interference value of the sub-bands, and filters out M sub-bands with the smallest effective interference value, from the preset frequency domain. Selecting the corresponding M candidate locations in the candidate locations, and performing the downlink common channel receiving process on the M candidate locations at the sending moment, where the downlink common channel includes a PSS, an SSS, and a PBCH, where the PBCH carries A field indicating the center frequency point number.
The method according to claim 13, wherein the user equipment sorts all the sub-bands according to the effective interference value of the sub-bands according to the PRB interference measurement value of each sub-band, and specifically includes:

The strong interference determination parameter is CQI, and the user equipment sorts all subbands according to the PRB downlink CQI measurement values of the subbands from large to small;

The strong interference determination parameter is a signal to interference and noise ratio, and the user equipment sorts all subbands according to the PRB downlink signal to interference and noise ratio measurement values of the subbands from large to small;

The strong interference determination parameter is a signal to interference ratio, and the user equipment sorts all subbands according to the PRB downlink signal to interference ratio measurement value of the subband from large to small;

The strong interference determination parameter is a dry-to-noise ratio, and the user equipment sorts all sub-bands according to the PRB downlink dry-to-noise ratio measurement value of the sub-band from small to large;

The strong interference determination parameter is the interference power, and the user equipment sorts all the sub-bands according to the PRB downlink interference power measurement values of the sub-bands from small to large.
A transmitting device for a downlink common channel, comprising:

An obtaining unit, configured to obtain, according to the network-side interference measurement value obtained by the self-measurement and the terminal-side interference level indication information reported by the user equipment, the average interference level difference value of the user equipment;

a determining unit, configured to determine whether the average interference level difference value exceeds a set first threshold;

a first processing unit, configured to group preset frequency domain candidate positions, and sequentially send a downlink common channel on each candidate location group by using a frequency hopping method at a sending time;

The second processing unit is configured to select N candidate locations in the preset frequency domain candidate locations based on the network side interference measurement values obtained by the self measurement, and send the downlink common channel in the N candidate locations at the sending moment.
The device of claim 15 further comprising:

a mapping unit, configured to map P frequency domain candidate locations within an access frequency range according to a system available bandwidth in a preprocessing stage;

The entire system available bandwidth is divided into P subbands, each of which is centered on one frequency domain candidate location and contains 6 PRBs, P being a positive integer.
The apparatus according to claim 16, wherein the mapping unit is specifically configured to: when mapping the P frequency domain candidate locations within the access frequency range according to the available bandwidth of the system:

According to the available bandwidth of the system, the default frequency domain transmission location of the following common channel is used as a reference point, and P frequency domain candidate locations are determined one by one according to the set frequency domain interval within the access frequency range.
The apparatus according to claim 16 or 17, wherein, when the interference measurement value obtained by the self-measurement and the terminal-side interference level indication information reported by the user equipment are used to obtain the average interference level difference value of the user equipment, the acquiring unit is specific Used for:

And obtaining, for each subband, a PRB interference measurement value of the subband according to the strong interference determination parameter of the subband, where the PRB interference measurement value of the subband is an average interference measurement of all PRBs on the subband value;

If the PRB interference measurement value of the sub-band meets a preset condition, determining that there is strong interference on the sub-band; otherwise, determining that there is no strong interference on the sub-band;

According to whether there is strong interference on each sub-band, the network-side interference level indication information is obtained, and the terminal-side interference level indication information reported by all user equipments accessed by the current system is obtained, based on the terminal-side interference level indication information and the location on all user equipments. The network side interference level indication information is obtained, and the average interference level difference value of the user equipment is obtained.
The apparatus according to claim 18, wherein if the PRB interference measurement value of the sub-band conforms to a preset condition, determining that there is strong interference on the sub-band; otherwise, determining that the sub-band is not When there is strong interference, the acquiring unit is specifically configured to:

The strong interference determination parameter is a channel quality indicator, and the PRB uplink channel quality indicator measurement value of the subband is used as the PRB interference measurement value of the subband, and the PRB uplink channel quality indicator measurement value of the subband is determined not to be If it is greater than a preset channel quality indication threshold, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band; or

The strong interference determination parameter is a signal to interference and noise ratio, and the PRB uplink signal to interference and noise ratio measurement value of the subband is used as a PRB interference measurement value of the subband, and the PRB uplink signal to interference and noise ratio of the subband is determined. When the measured value is not greater than a preset signal to interference and noise ratio threshold, it is determined that there is strong interference on the subband; otherwise, it is determined that there is no strong interference on the subband; or

The strong interference determination parameter is a signal to interference ratio, and the PRB uplink signal to interference ratio measurement value of the subband is used as the PRB interference measurement value of the subband, and the PRB uplink signal to interference ratio measurement value of the subband is determined not to be If it is greater than a preset signal-to-interference ratio threshold, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band; or

The strong interference determination parameter is a dry-to-noise ratio, and the measured value of the PRB uplink dry-to-noise ratio of the sub-band is used as the PRB interference measurement value of the sub-band, and the measured value of the PRB uplink dry-to-noise ratio of the sub-band is determined to be greater than Determining a strong interference on the sub-band when a preset dry-to-noise ratio threshold is determined; otherwise, determining that there is no strong interference on the sub-band; or

The strong interference determination parameter is interference power, and the PRB uplink interference power measurement value of the subband is used as the PRB interference measurement value of the subband, and determining that the PRB uplink interference power measurement value of the subband is greater than a preset When the interference power threshold is exceeded, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band.
The device according to claim 18, wherein all user devices accessed by the current system are acquired When the terminal side interference level indication information is reported, based on the terminal side interference level indication information and the network side interference level indication information on the user equipment, and the average interference level difference value of the user equipment is obtained, the acquiring unit is specifically configured to:

Determining, according to the interference level indication information, a number of subbands different from the network side interference level indication information, and determining the determined sub-station, according to the interference level indication information reported by each user equipment Dividing the number of the sub-bands by the number of all sub-bands to obtain the interference level difference value of the user equipment;

Determining whether the interference level difference value of each user equipment is greater than a preset second threshold, and if yes, determining that the user equipment and the network side have different interference levels; otherwise, determining that the user equipment and the network side have the same interference level ;

Determine the number of user equipments that are not in the same level as the interference level on the network side of the current system, and divide the determined number of user equipments by the total number of user equipments accessed by the current system to obtain the difference in the average interference level of the user equipment. value.
The apparatus according to claim 20, wherein the first processing is performed by grouping preset frequency domain candidate positions, and sequentially transmitting a downlink common channel on each candidate location group by using a frequency hopping method at a transmission time. The unit is specifically used to:

Determining frequency domain candidate location packets and numbering them from 0 to N1-1, N1 is the number of frequency domain candidate location packets, and the frequency offset of the preset frequency domain candidate locations according to the frequency offset from the center frequency point The minimum value of the shift is numbered from 0 to P-1 as a reference. For each of the preset frequency domain candidate positions Xi, the remainder Y1 obtained by dividing Xi by N1 is calculated, and the corresponding frequency domain candidate position is placed in the number Y1. In the group, where Xi is the number of any one of the frequency domain candidate positions, and Xi and N1 are positive integers;

The downlink common channel is sequentially transmitted on each candidate location group by using a frequency hopping method, where the downlink common channel includes a primary synchronization channel PSS, a secondary synchronization channel SSS, and a physical broadcast channel PBCH, where the PBCH carries the indication center frequency. The field of the dot.
The apparatus according to claim 20, wherein the interference measurement value obtained by the self measurement is selected among the preset frequency domain candidate positions, and the downlink is transmitted at the N candidate positions at the transmission time. The second processing unit is specifically configured to:

Based on the PRB interference measurement value of each subband, all the subbands are sorted according to the effective interference value of the subband from small to large, and the N subbands with the smallest effective interference value are selected, and the preset frequency domain candidate positions are selected. Corresponding N candidate locations, and transmitting a downlink common channel at the N candidate locations, where the downlink common channel includes a PSS, an SSS, and a PBCH, where the PBCH carries a field indicating a center frequency point number .
The apparatus according to claim 22, wherein, according to the PRB interference measurement value of each subband, when all subbands are sorted according to the effective interference value of the subband from small to large, the second processing unit is specifically used. to:

The strong interference determination parameter is a channel quality indicator, and all subbands are sorted according to the measured value of the PRB uplink channel quality indicator of the subband from large to small;

The strong interference determination parameter is a signal to interference and noise ratio, and all subbands are sorted according to the measured value of the PRB uplink signal to interference and noise ratio of the subband from large to small;

The strong interference determination parameter is a signal to interference ratio, and all subbands are sorted according to the PRB uplink signal to interference ratio measurement value of the subband from large to small;

The strong interference determination parameter is a dry-to-noise ratio, and all sub-bands are sorted according to the measured value of the PRB uplink dry-to-noise ratio of the sub-band from small to large;

The strong interference determination parameter is the interference power, and all the sub-bands are sorted according to the PRB uplink interference power measurement value of the sub-band from small to large.
A receiving device for a downlink common channel, comprising:

a determining unit, configured to determine P frequency domain candidate locations mapped by the network side and P subbands corresponding to P frequency domain candidate locations;

The receiving unit is configured to acquire the interference measurement value of the P subbands on the terminal side, and obtain the terminal side interference level indication information based on the interference measurement values of the P subbands, and report the interference to the network side based on the interference of the P subbands on the terminal side. The measured value selects M candidate positions among the P frequency domain candidate positions for receiving processing of the downlink common channel, where M and P are both positive integers, and M is smaller than P.
The apparatus according to claim 24, wherein the interference measurement value of the P sub-bands on the terminal side is obtained, and the terminal side interference level indication information is obtained based on the interference measurement values of the P sub-bands and reported to the network side, The receiving unit is specifically used for:

And obtaining, for each subband, a PRB interference measurement value of the subband according to the strong interference determination parameter of the subband, where the PRB interference measurement value of the subband is an average interference measurement of all PRBs on the subband value;

If the PRB interference measurement value of the sub-band meets a preset condition, determining that there is strong interference on the sub-band; otherwise, determining that there is no strong interference on the sub-band;

According to whether there is strong interference on each sub-band, the terminal side interference level indication information is obtained and reported to the network side.
The apparatus according to claim 25, wherein if the PRB interference measurement value of the sub-band conforms to a preset condition, determining that there is strong interference on the sub-band, otherwise determining that the sub-band is not When there is strong interference, the receiving unit is specifically configured to:

The strong interference determination parameter is a channel quality indicator, and the PRB downlink channel quality indicator measurement value of the subband is used as the PRB interference measurement value of the subband, and determining that the PRB downlink CQI measurement value of the subband is not greater than a preset When the CQI threshold is set, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band; or

The strong interference determination parameter is a signal to interference and noise ratio, and the measured value of the PRB downlink signal to interference and noise ratio of the subband is used as a PRB interference measurement value of the subband, and the PRB downlink signal to interference and noise ratio of the subband is determined. When the measured value is not greater than a preset signal to interference and noise ratio threshold, it is determined that there is strong interference on the subband; otherwise, it is determined that there is no strong interference on the subband; or

The strong interference determination parameter is a signal to interference ratio, and the PRB downlink signal to interference ratio measurement value of the subband is used as the subband When the PRB interferes with the measured value, and determines that the PRB downlink signal to interference ratio measurement value of the subband is not greater than a preset signal to interference ratio threshold, determining that there is strong interference on the subband; otherwise, determining the sub There is no strong interference on the belt; or

The strong interference determination parameter is a dry noise ratio, and the PRB downlink dry noise ratio measurement value of the subband is used as the PRB interference measurement value of the subband, and the PRB downlink dry noise ratio measurement value of the subband is determined to be greater than Determining a strong interference on the sub-band when a preset dry-to-noise ratio threshold is determined; otherwise, determining that there is no strong interference on the sub-band; or

The strong interference determination parameter is the interference power, and the PRB downlink interference power measurement value of the subband is used as the PRB interference measurement value of the subband, and the PRB downlink interference power measurement value of the subband is determined to be greater than a preset. When the interference power threshold is exceeded, it is determined that there is strong interference on the sub-band; otherwise, it is determined that there is no strong interference on the sub-band.
The apparatus according to claim 25 or 26, wherein when the M candidate positions are selected among the P frequency domain candidate positions for receiving the downlink common channel based on the interference measurement values of the P subbands of the terminal side of the terminal The receiving unit is specifically configured to:

Based on the PRB interference measurement value of each subband, all subbands are sorted according to the effective interference value of the subband from small to large, and M subbands with the smallest effective interference value are selected, and the preset frequency domain candidate positions are selected. Corresponding M candidate locations are received, and the downlink common channel receiving process is performed on the M candidate locations at the sending moment, where the downlink common channel includes a PSS, an SSS, and a PBCH, where the PBCH carries the indication center frequency point The field of the number.
The apparatus according to claim 27, wherein, based on the PRB interference measurement value of each subband, when all the subbands are sorted according to the effective interference value of the subband from small to large, the receiving unit is specifically configured to:

The strong interference determination parameter is CQI, and all subbands are sorted according to the PRB downlink CQI measurement values of the subbands from large to small;

The strong interference determination parameter is a signal to interference and noise ratio, and all subbands are sorted according to the measured value of the PRB downlink signal to interference and noise ratio of the subband from large to small;

The strong interference determination parameter is a signal to interference ratio, and all subbands are sorted according to the PRB downlink signal to interference ratio measurement values of the subbands from large to small;

The strong interference determination parameter is a dry-to-noise ratio, and all sub-bands are sorted according to the measured value of the PRB downlink dry-to-noise ratio of the sub-band from small to large;

The strong interference determination parameter is interference power, and all sub-bands are sorted according to the PRB downlink interference power measurement values of the sub-bands from small to large.