WO2017004994A1

WO2017004994A1 - Clear channel assessment method and device

Info

Publication number: WO2017004994A1
Application number: PCT/CN2016/074476
Authority: WO
Inventors: 薛飞; 马志锋; 赵亚军
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-07-08
Filing date: 2016-02-24
Publication date: 2017-01-12
Also published as: CN106341200A

Abstract

The present invention provides a clear channel assessment method and device. The method comprises: traversing a first channel of a plurality of channels for carrier aggregation, wherein the first channel is one or more channels currently transmitting signals; computing an adjacent channel interference of the transmitted signals of the first channel to a second channel of the plurality of channels statistically, wherein the second channel is a channel not transmitting signals; and determining whether the second channel is idle according to a difference between a signal receiving power of the second channel and the adjacent channel interference. The present invention addresses the problem in which the probability of performing carrier aggregation is low when performed on an unlicensed spectrum, thus increasing the probability of performing carrier aggregation.

Description

Idle channel evaluation method and device

Technical field

The present invention relates to the field of communications, and in particular to a method and apparatus for evaluating an idle channel.

Background technique

As the Assisted Access (LAA) is progressing in 3GPP standardization, the LAA implements carrier aggregation in the unlicensed spectrum. The reasons why LAA needs to support carrier aggregation include: there are a large number of spectrum resources in the unlicensed spectrum of the fifth generation mobile communication system (5G), which can effectively guarantee the spectrum requirement of LAA carrier aggregation; carrier aggregation is an important feature of 802.11n and 802.11ac. As a product that competes with Wi-Fi, LAA also needs carrier aggregation that supports Wi-Fi support.

However, in the existing Wi-Fi technology for carrier aggregation transmission, the Wi-Fi station independently performs Clear Channel Assessment (CCA) on different channels. However, due to the adjacent frequency leakage of the Wi-Fi transmitter and the filter adjacent channel selection characteristics of the receiver, when Wi-Fi is transmitting a signal on a certain channel and Wi-Fi performs CCA on the adjacent channel, the adjacent channel must be busy. Whether the adjacent channel is occupied by other sites. The Wi-Fi site can perform carrier aggregation only when neither of the adjacent channels is occupied by other Wi-Fi stations and the Wi-Fi station does not transmit signals on any of the channels. As shown in FIG. 1, when Wi-Fi performs carrier aggregation, the signal transmission time starting position of its adjacent carrier is the same. When a Wi-Fi station transmits a signal on a certain channel, the adjacent channel does not actually transmit a signal. It can be seen that the adjacent channel is busy due to the transmitter adjacent frequency leakage and the receiver filter adjacent channel selection characteristics, which reduces the opportunity for Wi-Fi to perform carrier aggregation.

Summary of the invention

The embodiment of the present invention provides a method and an apparatus for evaluating an idle channel, so as to at least solve the problem that the opportunity of carrier aggregation is low when carrier aggregation is implemented in an unlicensed spectrum in the related art.

According to an embodiment of the present invention, there is provided a method for evaluating a clear channel, comprising: traversing a first one of a plurality of channels aggregated by a carrier, wherein the first channel is one or more channels that are transmitting signals; Storing adjacent channel interference of the transmission signal on the first channel to a second one of the plurality of channels, wherein the second channel is a channel that does not transmit a signal; according to a received signal power of the second channel And determining, by the difference between the adjacent frequency interferences, whether the second channel is idle.

In the embodiment of the present invention, the traversing the first channel of the multiple channels of the carrier aggregation further includes: after traversing to all the channels, where no signal is sent, The mechanism competes for the usage rights of the channels of the plurality of channels to be transmitted.

In the embodiment of the present invention, counting the adjacent channel interference of the first channel to the second channel of the multiple channels includes: respectively, according to each channel in the first channel and the second Channel spacing relationship of the channel, calculating each of the An adjacent frequency leakage ratio and an adjacent frequency selectivity of the channel to the second channel; calculating, according to the adjacent channel leakage ratio and the adjacent frequency selectivity of the second channel, the transmission on each channel Interfering with the adjacent channel of the second channel; calculating, according to the adjacent channel interference of the transmission signal of each channel, the transmission signal on the first channel to the second channel Said adjacent frequency interference.

In the embodiment of the present invention, the adjacent channel interference of the transmission signal of each channel to the second channel is calculated according to the following formula:

Among them, ACIx_i represents the adjacent channel interference of the transmission signal on channel x, and Px represents the transmission power on channel x, ACLRx_i represents the adjacent frequency leakage ratio of channel x to channel i, and ACSx_i represents the adjacent frequency of channel x to channel i. Selectivity.

In the embodiment of the present invention, the adjacent channel interference of the transmission signal on the first channel to the second channel is calculated according to the following formula:

Wherein, the multiple channels of the carrier aggregation are channels n, n+1, . . . , m; ACIx_i represents the adjacent channel interference of the transmission signal on channel x to channel i; if the signal is being transmitted on channel x, Status _x Is 1; if there is no signal transmitted on channel x, Status _x is 0.

In the embodiment of the present invention, determining whether the second channel is idle according to the difference between the received signal power of the second channel and the adjacent frequency interference comprises: determining the received signal of the second channel Whether the difference between the power and the adjacent frequency interference is less than a preset threshold; if the determination result is yes, determining that the second channel is in an idle state; otherwise, determining that the second channel is in a busy state.

In the embodiment of the present invention, after determining whether the second channel is idle according to the difference between the received signal power of the second channel and the adjacent frequency interference, the method further includes: according to the first listening Said mechanism competes for the use rights of the second channel.

According to another embodiment of the present invention, there is also provided a clear channel evaluation apparatus, comprising: a traversal module, configured to traverse a first channel of a plurality of channels of carrier aggregation, wherein the first channel is a signal being transmitted One or more channels; a statistic module configured to count adjacent channel interference of the transmit signal on the first channel to a second one of the plurality of channels, wherein the second channel is a channel that does not transmit a signal The determining module is configured to determine whether the second channel is idle according to a difference between the received signal power of the second channel and the adjacent frequency interference.

In the embodiment of the present invention, the statistic module includes: a first calculating unit, configured to calculate each channel pair according to a channel spacing relationship between each channel and the second channel in the first channel, respectively The adjacent channel leakage ratio and the adjacent frequency selectivity of the second channel; the second calculating unit is configured to calculate each of the adjacent channels according to the adjacent channel leakage ratio and the adjacent frequency selectivity of the second channel And a third calculating unit is configured to calculate adjacent channel interference of the second channel according to the transmission signal of each channel, and calculate the first channel The transmitted signal interferes with the adjacent frequency of the second channel.

In the embodiment of the present invention, the determining module includes: a determining unit, configured to determine whether a difference between the received signal power of the second channel and the adjacent frequency interference is less than a preset threshold; Set to judge the result is yes In case, the second channel is determined to be in an idle state; otherwise, the second channel is determined to be in a busy state.

According to an embodiment of the present invention, a first channel of a plurality of channels traversed by carrier aggregation is used, wherein the first channel is one or more channels that are transmitting signals; and the transmission signal on the first channel is compared to the plurality of channels. Adjacent frequency interference of the second channel, wherein the second channel is a channel that does not transmit a signal; and according to the difference between the received signal power of the second channel and the adjacent channel interference, determining whether the second channel is idle or not, The problem that the spectrum aggregation opportunity is low when the spectrum is implemented in the carrier aggregation improves the chance of carrier aggregation.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a schematic diagram of a 40 MHz carrier aggregation scenario according to the related art;

2 is a flowchart of a method for evaluating an idle channel according to an embodiment of the present invention;

3 is a structural diagram of an idle channel evaluation apparatus according to an embodiment of the present invention;

4 is a block diagram showing a preferred configuration of an idle channel evaluation apparatus according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of an 80 MHz carrier aggregation sender ACLR according to a preferred embodiment of the present invention; FIG.

6 is a schematic diagram of an 80 MHz carrier aggregation receiving end ACS according to a preferred embodiment of the present invention;

7 is a schematic diagram of a 40 MHz carrier aggregation scenario in accordance with a preferred embodiment of the present invention;

FIG. 8 is a schematic diagram of a 40 MHz carrier aggregation adjacent channel coexistence scenario according to a preferred embodiment of the present invention; FIG.

9 is a schematic diagram of adjacent frequency leakage of a 40 MHz carrier aggregation transceiver in accordance with a preferred embodiment of the present invention;

10 is a schematic diagram of an 80 MHz carrier aggregation scenario according to a preferred embodiment of the present invention;

11 is a first schematic diagram of an 80 MHz carrier aggregation adjacent channel coexistence scenario according to a preferred embodiment of the present invention;

FIG. 12 is a second schematic diagram of an 80 MHz carrier aggregation adjacent channel coexistence scenario according to a preferred embodiment of the present invention; FIG.

FIG. 13 is a third schematic diagram of an 80 MHz carrier aggregation adjacent channel coexistence scenario according to a preferred embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It is to be understood that the terms "first", "second" and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.

Embodiments of the present invention provide a method for evaluating an idle channel. FIG. 2 is a flowchart of a method for evaluating an idle channel according to an embodiment of the present invention. As shown in FIG. 2, the process includes the following steps:

Step S202, traversing a first channel of the plurality of channels that are aggregated by the carrier, where the first channel is one or more channels that are transmitting signals;

Step S204, counting adjacent channel interference of the transmission signal on the first channel to the second channel of the plurality of channels, where the second channel is a channel that does not send a signal;

Step S206, determining whether the second channel is idle according to the difference between the received signal power of the second channel and the adjacent frequency interference.

Through the above steps, the adjacent frequency interference is included in the idle channel estimation process, and the difference between the received signal power and the adjacent frequency interference is used to determine whether the channel is idle, and the interference caused by the transmission signal of the other channel to the channel can be effectively eliminated. The problem that the channel idle state is judged incorrectly solves the problem that the carrier aggregation opportunity is low when the unlicensed spectrum implements carrier aggregation, and the opportunity of carrier aggregation is improved.

In the embodiment of the present invention, if the traversal of all the channels in the plurality of channels does not send a signal, the channel of the to-be-transmitted signal in the plurality of channels may be directly determined to be in an idle state, according to the first listening. It is said that the mechanism competes for the use rights of the channels of the signals to be transmitted in the plurality of channels.

In the embodiment of the present invention, in step S204, the adjacent channel leakage ratio and the adjacent frequency selectivity of each channel to the second channel may be calculated according to the channel spacing relationship of each channel and the second channel in the first channel, respectively; Calculating adjacent channel interference of the transmission signal on each channel to the second channel according to the adjacent frequency leakage ratio and the adjacent frequency selectivity of each channel to the second channel; and the adjacent frequency of the second channel according to the transmission signal of each channel Interference, calculating the adjacent channel interference of the transmitted signal on the first channel to the second channel. In the above manner, the sum of adjacent channel interferences of the channels of all the transmitted signals in the plurality of channels to the second channel can be calculated.

In the embodiment of the present invention, the adjacent channel interference of the transmission signal of each channel to the second channel may be calculated according to the following formula:

In the embodiment of the present invention, the adjacent channel interference of the transmitted signal on the first channel to the second channel may be calculated according to the following formula:

Wherein, the plurality of channels of the carrier aggregation are channels n, n+1, . . . , m; ACIx_i represents the adjacent channel interference of the transmission signal on the channel x to the channel i; if the signal is being transmitted on the channel x, the Status _x is 1 ; If there is no signal sent on channel x, Status _x is 0.

In the embodiment of the present invention, in step S206, it may be determined whether the difference between the received signal power of the second channel and the adjacent frequency interference is less than a preset threshold; if the determination result is yes, determining that the second channel is Idle state; otherwise, it is determined that the second channel is busy. The preset threshold can be set to a reasonable value according to requirements.

In the embodiment of the present invention, after determining whether the second channel is idle according to the difference between the received signal power of the second channel and the adjacent channel interference, the usage right of the second channel may be contend according to the first listening mechanism.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, The optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

In the present embodiment, an idle channel evaluation apparatus is further provided, which is used to implement the foregoing embodiments and preferred embodiments, and has not been described again. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

3 is a schematic structural diagram of an idle channel evaluation apparatus according to an embodiment of the present invention. As shown in FIG. 3, the apparatus includes: a traversal module 32, a statistics module 34, and a judging module 36, wherein the traversal module 32 is configured to traverse carrier aggregation. The first of the plurality of channels, wherein the first channel is one or more channels that are transmitting signals; the statistics module 34 is coupled to the traversal module 32, configured to count the transmitted signals on the first channel to the plurality of channels The adjacent channel interference of the second channel, wherein the second channel is a channel that does not send a signal; the determining module 36 is coupled to the statistics module 34, and is set to be based on a difference between the received signal power of the second channel and the adjacent channel interference, Determine if the second channel is idle.

FIG. 4 is a schematic diagram of a preferred structure of an idle channel evaluation apparatus according to an embodiment of the present invention. As shown in FIG. 4, in the embodiment of the present invention, the statistics module 34 includes: a first calculating unit 342, configured to be respectively according to the first channel. a channel spacing relationship between each channel and the second channel, calculating an adjacent frequency leakage ratio and an adjacent frequency selectivity of each channel to the second channel; a second calculating unit 344 coupled to the first computing unit 342, configured to The adjacent channel leakage ratio and the adjacent frequency selectivity of the channel to the second channel are calculated, and the adjacent channel interference of the transmitted signal on the second channel is calculated; the third calculating unit 346 is coupled to the second calculating unit 344, and is set according to The adjacent signal interference of the transmitted signal of each channel to the second channel calculates the adjacent frequency interference of the transmitted signal on the first channel to the second channel.

In the embodiment of the present invention, the adjacent channel interference of the transmitted signal on the first channel to the second channel is calculated according to the following formula:

In the embodiment of the present invention, the determining module 36 includes: a determining unit 362, configured to determine whether the difference between the received signal power of the second channel and the adjacent frequency interference is less than a preset threshold; the determining unit 364 is coupled to the determining unit 362. And set to determine that the second channel is in an idle state if the determination result is yes; otherwise, determine that the second channel is in a busy state.

It should be noted that each of the above modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the modules are located in multiple In the processor.

In order to make the description of the embodiments of the present invention more clear, the following description and description are given in conjunction with the preferred embodiments.

In the working mode of LAA carrier aggregation, especially when the LAA base station is transmitting a signal on a certain channel, the LAA base station itself attempts to transmit a signal on the adjacent channel, so the LAA base station needs to perform a Clear Channel Assessment (CCA) judgment channel on the adjacent channel. Whether it is idle. If the LAA base station independently performs CCA between channels and determines whether the channel is idle, the adjacent channel in the above scenario will be judged to be busy. The preferred embodiment of the present invention provides an LAA carrier aggregation working mechanism based on adjacent channel measurement, which can effectively increase the transmission opportunity of the LAA base station on the adjacent channel.

For the above LAA carrier aggregation operation problem, the preferred embodiment of the present invention adopts the following technical solutions:

1) LAA station A attempts to transmit a signal on channel i, first determining which channels and channel i can be used for carrier aggregation according to channel configuration information of LAA carrier aggregation, for example, channel n to channel m can be used for carrier aggregation, where n≤i ≤m;

2a) traversing all channels of the carrier aggregation configuration. If LAA station A does not transmit signals on any of channel n to channel m, then according to the traditional Listen Before Talk (LBT) mechanism on channel i Perform channel competition to obtain channel usage rights;

2b) traversing all the channels of the carrier aggregation configuration. If LAA station A transmits a signal on channel n, ACLR _{n_i} and ACS _{n_i are} obtained according to the channel spacing relationship between channel n and channel i, as shown in FIG. 5 and FIG. The adjacent frequency leakage ratio ACLR _{n_i} (Adjacent Channel Leakage Ratio) is the ratio of the transmission power on the channel A of the LAA station and the power leaked on the channel i. The adjacent frequency selective ACS _{n_i} (Adjacent Channel Selection) is the channel of the LAA station A. The transmission power on n and the ratio of the signal power of the LAA station A on channel i to the signal power on channel n. Calculating the adjacent channel interference ACI _{n_i} of the transmission signal of the LAA station A on the channel n to the channel i,

Where P _n is the transmission power of the LAA on channel n, P _n , ACLR _{n_i} , and ACS _{n_i} are linear values; LAA station A counts the transmission of LAA station A itself on channel n to channel m before channel C performs CCA, And count the adjacent channel interference ACI on channel i:

Where ACI _{x_i} is the adjacent channel interference ACI _{n_i} of the transmission signal of LAA station A on channel x to channel i, Status _x indicates whether LAA station A is transmitting signal on channel x, if LAA station A is transmitting on channel x Signal, then Status _x is 1; if LAA station A does not send a signal on channel x, Status _x is 0;

3) When LAA station A performs CCA on channel i, compare the received signal power P _{R of} LAA on channel i with ACI: if (P _R -ACI) is greater than or equal to the threshold, channel i is considered busy State; if (P _R -ACI) is less than the threshold, channel i is considered to be in an idle state, and channel competition is performed on channel i according to the conventional LBT mechanism, thereby obtaining channel i usage rights.

Through the above scheme, the LAA carrier aggregation is optimized to enhance the transmission opportunity of LAA carrier aggregation. Before performing CCA on a certain channel, the LAA base station firstly interacts with the LAA base station itself on different channels, and can avoid that a certain idle channel is considered busy due to adjacent channel interference, and solves the problem that the LAA base station itself transmits a signal on a certain channel. The problem that the adjacent channel is unavailable is to enhance the LAA carrier aggregation opportunity.

The preferred embodiments of the present invention are described and illustrated by way of specific examples.

Preferred Embodiment 1: LAA 40 MHz carrier aggregation scenario, as shown in FIG.

step 1:

At time T1, the LAA base station attempts to transmit a signal on channel 1, and the LAA base station first determines whether the base station transmits a signal on the adjacent channel, and finds that the LAA base station does not transmit a signal in the adjacent channel, and directly completes the channel competition process according to the conventional CCA procedure;

Step 2:

At time T2, the LAA base station attempts to transmit a signal on channel 2, and the LAA base station determines whether the base station transmits a signal on the adjacent channel, and finds that the LAA base station is transmitting a signal on channel 1, and calculates channel 1 according to the frequency center interval relationship between channel 2 and channel 1. The power value of the adjacent frequency leaking to channel 2 is calculated as follows:

P _A = P ₁ -10lgACIR ₁ ;

Where P ₁ is the transmit power of the LAA base station on channel 1,

ACLR ₁ is the ratio of the transmission power of the LAA base station on channel 1 and the power leaked to channel 2, and ACS ₁ is the transmission power of the LAA base station on channel 1 and the channel 1 introduced by the filter of the LAA base station on channel 2. The ratio of signal power, adjacent frequency leakage is shown in Figure 8 and Figure 9, ACLR ₁ and ACS ₁ are all linear values, as shown in Figure 5 and Figure 6;

The LAA base station compares the received power value (P _R ) above channel 2 with P _A :

If P _R -P _{A is} greater than the threshold, it is determined that the channel is busy and cannot be used;

If P _R -P _{A is} less than the threshold, it is judged that the channel is in an idle state and can be used.

Preferred Embodiment 2: LAA 80 MHz carrier aggregation scenario, as shown in FIG.

step 1:

Step 2:

At time T2, the LAA base station attempts to transmit a signal on channel 3. The LAA base station determines whether its own base station transmits a signal on the adjacent channel, and finds that the LAA base station is transmitting a signal on channel 1, and calculates channel 1 according to the frequency center interval relationship between channel 3 and channel 1. The power value of the adjacent frequency leakage to channel 3 is calculated as follows:

P _A = P ₁ -10lgACIR ₁ ;

Where P _A is the power value of channel 1 leaking to channel 3, and P ₁ is the transmission power of the LAA base station on channel 1.

The adjacent frequency leakage is shown in Figure 11. ACIR ₁ , ACLR ₁ and ACS ₁ are all linear values, as shown in Figure 5 and Figure 6;

The LAA base station compares the received power value P _R over channel 3 with P _A :

If P _R -P _{A is} greater than the threshold, it is determined that the channel 3 is in a busy state and cannot be used;

If P _R -P _{A is} less than the threshold, it is judged that the channel 3 is in an idle state and can be used.

Step 3:

At time T3, the LAA base station attempts to transmit a signal on channel 2, and the LAA base station determines whether the base station transmits a signal on the adjacent channel, and finds that the LAA base station is transmitting signals on channel 1 and channel 3, according to the frequency interval between channel 2 and channel 1, channel 3. Relationship, calculate the power value of channel 1 and channel 3 leakage to channel 2, and calculate the formula as follows:

P _B =P ₁ -10lgACIR ₁ ;

Where P _B is the power value of channel 1 leakage to channel 2, and P ₁ is the transmission power of the LAA base station on channel 1.

The adjacent frequency leakage is shown in Figure 12. ACIR ₁ , ACLR ₁ and ACS ₁ are all linear values, as shown in Figure 5 and Figure 6;

P _C =P ₃ -10lgACIR ₂ ;

Wherein, P _C is the power value of channel 3 leakage to channel 2, and P ₃ is the transmission power of the LAA base station on channel 3.

The adjacent frequency leakage is shown in Figure 12. ACIR ₂ , ACLR ₂ , and ACS ₂ are all linear values, as shown in Figure 5 and Figure 6;

The LAA base station compares the received power value P _R over channel 3 with P _B , P _C :

If P _R -(P _B +P _C ) is greater than the threshold, it is determined that the channel 2 is in a busy state and cannot be used;

If P _R -(P _B +P _C ) is less than the threshold value, it is judged that the channel 2 is in an idle state and can be used.

Step 4:

At time T4, the LAA base station attempts to transmit a signal on channel 4, and the LAA base station determines whether its own base station transmits a signal on the adjacent channel, and finds that the LAA base station is transmitting signals on channel 1, channel 2, and channel 3, according to channel 4 and channel 1, channel 2 The frequency interval relationship of channel 3 is calculated, and the power value of the adjacent channel leakage to channel 4 in channel 1, channel 2, and channel 3 is calculated, and the calculation formula is as follows:

P _D =P ₃ -10lgACIR ₁ ;

Where P _D is the power value of channel 3 leakage to channel 4, and P ₃ is the transmission power of the LAA base station on channel 3.

The adjacent frequency leakage is shown in Figure 13. ACIR ₁ , ACLR ₁ and ACS ₁ are all linear values, as shown in Figure 5 and Figure 6;

P _E =P ₁ -10lgACIR ₂ ;

Where P _E is the power value of channel 1 leakage to channel 4, and P ₁ is the transmission power of the LAA base station on channel 1.

The adjacent frequency leakage is shown in Figure 13. ACIR ₂ , ACLR ₂ , and ACS ₂ are all linear values, as shown in Figure 5 and Figure 6;

P _F =P ₂ -10lgACIR ₃ ;

Wherein, P _F is the power value of the channel 2 adjacent frequency leakage to the channel 4, and P ₂ is the transmission power of the LAA base station on the channel 2,

The adjacent frequency leakage is shown in Figure 13. ACIR ₃ , ACLR ₃ , and ACS ₃ are all linear values, as shown in Figure 5 and Figure 6;

The LAA base station compares the received power values P _R over channel 4 with P _D , P _E , P _F :

If P _R -(P _D +P _E +P _F ) is greater than the threshold value, it is determined that the channel 4 is in a busy state and cannot be used;

If P _R -(P _D +P _E +P _F ) is less than the threshold value, it is judged that the channel 4 is in an idle state and can be used.

In another embodiment, software is also provided for performing the technical solutions described in the above embodiments and preferred embodiments.

In another embodiment, a storage medium is further provided, wherein the software includes the above-mentioned software, including but not limited to: an optical disk, a floppy disk, a hard disk, an erasable memory, and the like.

It is to be understood that the terms "first", "second" and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a particular order or order. It will be understood that the objects so used are interchangeable where appropriate so that the embodiments of the invention described herein can be The order is implemented outside. In addition, the terms "comprises" and "comprises" and "the" and "the" are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to Those steps or units may include other steps or units not explicitly listed or inherent to such processes, methods, products or devices.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

The foregoing technical solution of the embodiment of the present invention may be applied to a first channel of a plurality of channels traversing carrier aggregation, where the first channel is one or more channels that are transmitting signals; The adjacent signal interferes with the second channel of the plurality of channels, wherein the second channel is a channel of the untransmitted signal; and the difference between the received signal power of the second channel and the adjacent channel interference is determined. The method of whether the second channel is idle or not solves the problem that the carrier aggregation opportunity is low when carrier aggregation is implemented in the unlicensed spectrum, and the opportunity for carrier aggregation is improved.

Claims

A method for evaluating an idle channel, comprising:

Traversing a first one of a plurality of channels of carrier aggregation, wherein the first channel is one or more channels that are transmitting signals;

Storing adjacent channel interference of the transmit signal on the first channel to a second one of the plurality of channels, wherein the second channel is a channel that does not transmit a signal;

Determining whether the second channel is idle according to a difference between the received signal power of the second channel and the adjacent frequency interference.
The method of claim 1, wherein the traversing the first channel of the plurality of channels of carrier aggregation further comprises:

In the case of traversing to the fact that all of the plurality of channels do not transmit signals, the usage rights of the channels of the plurality of channels to be transmitted are contending according to the listening mechanism.
The method of claim 1, wherein the counting the adjacent channel interference of the first channel to the second channel of the plurality of channels comprises:

Calculating, according to a channel spacing relationship between each channel of the first channel and the second channel, an adjacent frequency leakage ratio and an adjacent frequency selectivity of each channel to the second channel;

Calculating, according to the adjacent channel leakage ratio and the adjacent frequency selectivity of the second channel, the adjacent channel interference of the transmission signal on each channel to the second channel;

And calculating, according to the adjacent channel interference of the transmission signal of each channel to the second channel, the adjacent frequency interference of the transmission signal on the first channel to the second channel.
The method according to claim 3, wherein the adjacent channel interference of the transmission signal of each channel to the second channel is calculated according to the following formula:

Where ACI x_i represents the adjacent channel interference of the transmitted signal on channel x to channel i, P x represents the transmission power on channel x, ACLR x_i represents the adjacent frequency leakage ratio of channel x to channel i, and ACS x_i represents the channel x to channel The adjacent frequency selectivity of i.
The method according to claim 3, wherein said adjacent frequency interference of said transmitted signal on said first channel to said second channel is calculated according to the following formula:

Wherein, the multiple channels of the carrier aggregation are channels n, n+1, . . . , m; ACIx_i represents the adjacent channel interference of the transmission signal on channel x to channel i; if the signal is being transmitted on channel x, Status x Is 1; if there is no signal transmitted on channel x, Status x is 0.
The method according to claim 1, wherein determining whether the second channel is idle according to a difference between the received signal power of the second channel and the adjacent frequency interference comprises:

Determining whether a difference between the received signal power of the second channel and the adjacent frequency interference is less than a preset threshold;

If the result of the determination is yes, the second channel is determined to be in an idle state; otherwise, the second channel is determined to be in a busy state.
The method of claim 1, wherein after determining whether the second channel is idle according to a difference between the received signal power of the second channel and the adjacent channel interference, the method further comprises:

According to the listening and speaking mechanism, the right to use the second channel is competed.
An idle channel evaluation apparatus includes:

a traversal module, configured to traverse a first channel of a plurality of channels of carrier aggregation, wherein the first channel is one or more channels that are transmitting signals;

a statistic module, configured to collect a neighboring frequency interference of a transmit signal on the first channel to a second one of the multiple channels, where the second channel is a channel that does not send a signal;

The determining module is configured to determine whether the second channel is idle according to a difference between the received signal power of the second channel and the adjacent frequency interference.
The apparatus of claim 8 wherein said statistical module comprises:

a first calculating unit, configured to calculate, according to a channel spacing relationship between each channel and the second channel in the first channel, an adjacent frequency leakage ratio and an adjacent frequency selection of each channel to the second channel Sex

a second calculating unit, configured to calculate, according to the adjacent channel leakage ratio and the adjacent frequency selectivity of the second channel, the adjacent channel interference of the transmission signal on each channel to the second channel ;

And a third calculating unit, configured to calculate, according to the adjacent channel interference of the transmission signal of each channel to the second channel, the adjacent frequency interference of the transmission signal on the first channel to the second channel.
The apparatus of claim 8 wherein said determining module comprises:

a determining unit, configured to determine whether a difference between the received signal power of the second channel and the adjacent frequency interference is less than a preset threshold;

The determining unit is configured to determine that the second channel is in an idle state if the determination result is yes; otherwise, determine that the second channel is in a busy state.