WO2015103734A1 - 一种进行下行传输的方法、系统和设备 - Google Patents
一种进行下行传输的方法、系统和设备 Download PDFInfo
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- WO2015103734A1 WO2015103734A1 PCT/CN2014/070246 CN2014070246W WO2015103734A1 WO 2015103734 A1 WO2015103734 A1 WO 2015103734A1 CN 2014070246 W CN2014070246 W CN 2014070246W WO 2015103734 A1 WO2015103734 A1 WO 2015103734A1
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 206
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000004891 communication Methods 0.000 abstract description 17
- 238000010586 diagram Methods 0.000 description 11
- 238000012545 processing Methods 0.000 description 8
- 238000011144 upstream manufacturing Methods 0.000 description 8
- 238000004590 computer program Methods 0.000 description 6
- 230000002238 attenuated effect Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 230000008054 signal transmission Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000005562 fading Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0023—Interference mitigation or co-ordination
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
- H04W16/04—Traffic adaptive resource partitioning
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
- H04W16/06—Hybrid resource partitioning, e.g. channel borrowing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J2211/00—Orthogonal indexing scheme relating to orthogonal multiplex systems
- H04J2211/003—Orthogonal indexing scheme relating to orthogonal multiplex systems within particular systems or standards
- H04J2211/005—Long term evolution [LTE]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/042—Public Land Mobile systems, e.g. cellular systems
Definitions
- the present application relates to the field of wireless communication technologies, and in particular, to a method, system, and device for performing downlink transmission. Background technique
- LTE Long Term Evolution
- LTE ⁇ -f OFDMA Orthogonal Frequency Division Multiple Access
- 3GPP 3rd Generation Partnership Project
- FDD Frequency division duplex
- TDD Time division duplex
- the FDD-style LTE is FDD-LTE.
- the evolution of the TDD system is synchronized with the evolution of the FDD system.
- the FDD mode is characterized by receiving and transmitting on two symmetric frequency channels separated (up and down frequency interval 190MHz).
- the uplink and downlink resources occupy the same bandwidth, but the uplink and downlink services are asymmetric. If the downlink service is larger than the uplink service, it may result in waste of resources. Downstream services A site with high demand can use the idle uplink frequency band to transmit downlink data to make full use of resources.
- the total transmit power of the base station is generally higher than the bandwidth occupied by the user equipment. Therefore, if the base station directly transmits the downlink signal in the entire uplink frequency band, the signal strength of the downlink signal leaking to the adjacent frequency may be higher than the interference tolerance threshold of the adjacent frequency. (As shown in Figure 1), causing serious interference to the communication of adjacent-frequency user equipment.
- the present invention provides a method, a system, and a device for performing downlink transmission, which are used to solve the problem that in the prior art, when the uplink frequency band is occupied for downlink transmission, the communication of the adjacent frequency user equipment may be seriously interfered.
- a method for performing downlink transmission including:
- the network side device determines an uplink frequency band for downlink transmission including the protection frequency band and the available frequency band; the network side device sends a downlink signal to the user equipment on the available frequency band, and does not send and receive any signal on the protection frequency band;
- the guard band is located in a high frequency portion and/or a low frequency portion of the uplink frequency band.
- the high frequency part and the low frequency part of the uplink frequency band each have a The guard band
- the uplink frequency band used for downlink transmission is adjacent to another uplink frequency band for downlink transmission, and the uplink frequency band is the highest frequency band of all adjacent uplink frequency bands, the high frequency portion of the uplink frequency band has one of the Protection band
- the uplink frequency band used for downlink transmission is adjacent to another uplink frequency band for downlink transmission, and the uplink frequency band is the lowest frequency band of all adjacent uplink frequency bands, the low frequency portion of the uplink frequency band has one of the protection Frequency band.
- the bandwidth of the second possible real segment and the bandwidth of the available frequency band are configured to be any suitable bandwidth
- the network side device determines a bandwidth other than the bandwidth of the minimum protection band bandwidth of the uplink frequency band as the maximum value of the available frequency band, and the slave system can support One of the bandwidths of the plurality of frequency bands is selected as the bandwidth of the available frequency band, and half of the bandwidth of the uplink frequency band other than the bandwidth of the available frequency band is used as the bandwidth of the protection frequency band; If there is one of the protection bands in the uplink frequency band, the network side device determines a bandwidth other than the bandwidth of the minimum frequency of the protection band in the uplink frequency band as the maximum value of the available frequency band, and all the bandwidths that the system can support The bandwidth of the frequency band that is not greater than the maximum value of the available frequency band is selected as the bandwidth of the available frequency band, and the bandwidth of the uplink frequency band other than the bandwidth of the available frequency band is used as the bandwidth of the protection frequency band.
- the network side device After determining the uplink frequency band for the downlink transmission, including the protection frequency band and the available frequency band, the method further includes: the network side device scheduling the user equipment, and transmitting on the uplink frequency band except the uplink frequency band used for downlink transmission Uplink control information and/or reference signals.
- the network side device After determining the uplink frequency band for the downlink transmission, including the protection frequency band and the available frequency band, the method further includes: when the network side device transmits the scheduling information of the downlink signal in the uplink frequency band, sending, according to the determined payload size payload size corresponding to the determined available frequency band width information.
- a second aspect provides a method for performing downlink transmission, where the method includes: determining, by a user equipment, an uplink frequency band for downlink transmission including a guard frequency band and an available frequency band; and receiving, by the user equipment, the network side on the available frequency band The downlink signal sent by the device, and no signal is sent and received on the guard band;
- the guard band is located in a high frequency portion and/or a low frequency portion of the uplink frequency band.
- the high frequency part and the low frequency part of the uplink frequency band each have a The guard band
- the uplink frequency band used for downlink transmission is adjacent to another uplink frequency band for downlink transmission, and the uplink frequency band is the highest frequency band of all adjacent uplink frequency bands, the high frequency portion of the uplink frequency band has one of the Protection band
- the uplink frequency band used for downlink transmission is adjacent to another uplink frequency band used for downlink transmission, And the uplink frequency band is the lowest frequency band of all adjacent uplink frequency bands, and the low frequency part of the uplink frequency band has one of the protection frequency bands.
- the network side device determines a bandwidth other than the bandwidth of the minimum protection band bandwidth of the uplink frequency band as the maximum value of the available frequency band, and the slave system can support One of the bandwidths of the plurality of frequency bands is selected as the bandwidth of the available frequency band, and half of the bandwidth of the uplink frequency band other than the bandwidth of the available frequency band is used as the bandwidth of the protection frequency band;
- the network side device determines a bandwidth other than the bandwidth of the minimum frequency of the protection band in the uplink frequency band as the maximum value of the available frequency band, and all the bandwidths that the system can support
- the bandwidth of the frequency band that is not greater than the maximum value of the available frequency band is selected as the bandwidth of the available frequency band, and the bandwidth of the uplink frequency band other than the bandwidth of the available frequency band is used as the bandwidth of the protection frequency band.
- the user equipment determines After the uplink frequency band for the downlink transmission, including the protection frequency band and the available frequency band, the method further includes: the user equipment, according to the scheduling of the network side device, on an uplink frequency band other than the uplink frequency band used for downlink transmission The uplink control information and/or the reference signal are transmitted.
- the user equipment determines After the uplink frequency band for the downlink transmission, including the protection frequency band and the available frequency band, the method further includes: when the user equipment transmits the scheduling information of the downlink signal in the uplink frequency band, receiving the information according to the payload size payload size corresponding to the determined width of the available frequency band.
- the third aspect provides a network side device that performs downlink transmission, where the network side device includes: a determining module, configured to determine an uplink frequency band for downlink transmission including a guard frequency band and an available frequency band;
- a transmission module configured to send a downlink signal to the user equipment on the available frequency band, and not send and receive any signal on the protection frequency band;
- the guard band is located in a high frequency portion and/or a low frequency portion of the uplink frequency band.
- the high frequency part and the low frequency part of the uplink frequency band each have a The guard band
- the uplink frequency band used for downlink transmission is adjacent to another uplink frequency band for downlink transmission, and the uplink frequency band is the highest frequency band of all adjacent uplink frequency bands, the high frequency portion of the uplink frequency band has one of the Protection band
- the uplink frequency band used for downlink transmission is adjacent to another uplink frequency band for downlink transmission, and the uplink frequency band is the lowest frequency band of all adjacent uplink frequency bands, the low frequency portion of the uplink frequency band has one of the protection Frequency band.
- the determining module is specifically configured to determine, according to the following manner, the protection frequency band in the uplink frequency band. Bandwidth and bandwidth of the available frequency bands:
- the network side device determines a bandwidth other than the bandwidth of the minimum protection band bandwidth of the uplink frequency band as the maximum value of the available frequency band, and the slave system can support One of the bandwidths of the plurality of frequency bands is selected as the bandwidth of the available frequency band, and half of the bandwidth of the uplink frequency band other than the bandwidth of the available frequency band is used as the bandwidth of the protection frequency band;
- the network side device determines a bandwidth other than the bandwidth of the minimum frequency of the protection band in the uplink frequency band as the maximum value of the available frequency band, and all the bandwidths that the system can support The bandwidth of the frequency band that is not greater than the maximum value of the available frequency band is selected as the bandwidth of the available frequency band, and the bandwidth of the uplink frequency band other than the bandwidth of the available frequency band is used as the bandwidth of the protection frequency band.
- the transmitting module further Used to: transmit uplink control information and/or reference signals on the frequency band.
- the transmission module further Used for:
- the scheduling information of the downlink signal is transmitted in the uplink frequency band
- the information is transmitted according to the payload size payload size corresponding to the determined width of the available frequency band.
- a fourth aspect provides a user equipment that performs downlink transmission, where the user equipment includes:
- a determining module configured to determine an uplink frequency band for downlink transmission including a guard frequency band and an available frequency band
- a transmission module configured to receive a downlink signal sent by the network side device on an available frequency band, and not send and receive any signal on the protection frequency band;
- the guard band is located in a high frequency portion and/or a low frequency portion of the uplink frequency band.
- the high frequency part and the low frequency part of the uplink frequency band each have a The guard band
- the uplink frequency band used for downlink transmission is adjacent to another uplink frequency band for downlink transmission, and the uplink frequency band is the highest frequency band of all adjacent uplink frequency bands, the high frequency portion of the uplink frequency band has one of the Protection band
- the uplink frequency band used for downlink transmission is adjacent to another uplink frequency band for downlink transmission, and the uplink frequency band is the lowest frequency band of all adjacent uplink frequency bands, the low frequency portion of the uplink frequency band has one of the protection Frequency band.
- the determining module is specifically configured to determine, according to the following manner, a bandwidth of the protection frequency band and a bandwidth of the available frequency band in the uplink frequency band:
- the network side device determines a bandwidth other than the bandwidth of the minimum protection band bandwidth of the uplink frequency band as the maximum value of the available frequency band, and the slave system can support One of the bandwidths of the plurality of frequency bands is selected as the bandwidth of the available frequency band, and half of the bandwidth of the uplink frequency band other than the bandwidth of the available frequency band is used as the bandwidth of the protection frequency band;
- the network side device determines a bandwidth other than the bandwidth of the minimum frequency of the protection band in the uplink frequency band as the maximum value of the available frequency band, and all the bandwidths that the system can support
- the bandwidth of the frequency band that is not greater than the maximum value of the available frequency band is selected as the bandwidth of the available frequency band, and the bandwidth of the uplink frequency band other than the bandwidth of the available frequency band is used as the bandwidth of the protection frequency band.
- the transmitting module further Used for:
- the transmission module further Used for:
- the scheduling information of the downlink signal is transmitted in the uplink frequency band
- the information is received according to the payload size corresponding to the determined width of the available frequency band.
- a fifth aspect provides a network side device that performs downlink transmission, including:
- a processor configured to determine an uplink frequency band for downlink transmission including a guard frequency band and an available frequency band, send a downlink signal to the user equipment on the available frequency band by the transceiver, and send and receive no signal on the guard frequency band;
- a transceiver for receiving and transmitting data under the control of a processor.
- the guard band is located in a high frequency portion and/or a low frequency portion of the uplink frequency band.
- the high frequency part and the low frequency part of the uplink frequency band each have a The guard band
- the uplink frequency band used for downlink transmission is adjacent to another uplink frequency band for downlink transmission, and the uplink frequency band is the highest frequency band of all adjacent uplink frequency bands, the high frequency portion of the uplink frequency band has one of the Protection band
- the uplink frequency band used for downlink transmission is adjacent to another uplink frequency band for downlink transmission, and the uplink frequency band is the lowest frequency band of all adjacent uplink frequency bands, the low frequency portion of the uplink frequency band has one of the protection Frequency band.
- the processor is specifically configured to determine, according to the following manner, the protection frequency band in the uplink frequency band Bandwidth and bandwidth of the available frequency bands:
- the network side device determines a bandwidth other than the bandwidth of the minimum protection band bandwidth of the uplink frequency band as the maximum value of the available frequency band, and the slave system can support One of the bandwidths of the plurality of frequency bands is selected as the bandwidth of the available frequency band, and half of the bandwidth of the uplink frequency band other than the bandwidth of the available frequency band is used as the bandwidth of the protection frequency band;
- the network side device determines a bandwidth other than the bandwidth of the minimum frequency of the protection band in the uplink frequency band as the maximum value of the available frequency band, and all the bandwidths that the system can support
- the bandwidth of the frequency band that is not greater than the maximum value of the available frequency band is selected as the bandwidth of the available frequency band, and the bandwidth of the uplink frequency band other than the bandwidth of the available frequency band is used as the bandwidth of the protection frequency band.
- the processor is further Used for:
- Uplink control information and/or reference signals are transmitted on other uplink frequency bands.
- the processor is further Used for:
- the transceiver When the transceiver transmits the scheduling information of the downlink signal in the uplink frequency band, the information is transmitted according to the payload size payload size corresponding to the determined width of the available frequency band.
- a sixth aspect provides a user equipment for performing downlink transmission, including:
- a processor configured to determine an uplink frequency band for downlink transmission including a guard frequency band and an available frequency band, receive, by the transceiver, a downlink signal sent by the network side device on the available frequency band, and do not send and receive any signal on the protection frequency band;
- a transceiver for receiving and transmitting data under the control of a processor.
- the guard band is located in a high frequency portion and/or a low frequency portion of the uplink frequency band.
- the high frequency part and the low frequency part of the uplink frequency band each have a The guard band
- the uplink frequency band used for downlink transmission is adjacent to another uplink frequency band for downlink transmission, and the uplink frequency band is the highest frequency band of all adjacent uplink frequency bands, the high frequency portion of the uplink frequency band has one of the Protection band
- the uplink frequency band used for downlink transmission is adjacent to another uplink frequency band for downlink transmission, and the uplink frequency band is the lowest frequency band of all adjacent uplink frequency bands, the low frequency portion of the uplink frequency band has one of the protection Frequency band.
- the processor is specifically configured to determine, according to the following manner, the protection frequency band in the uplink frequency band. Bandwidth and bandwidth of the available frequency bands:
- the network side device determines a bandwidth other than the bandwidth of the minimum protection band bandwidth of the uplink frequency band as the maximum value of the available frequency band, and the slave system can support Selecting a frequency that is not greater than the maximum value of the available frequency band among all the bandwidths of the frequency band Bandwidth is used as the bandwidth of the available frequency band, and half of the bandwidth of the uplink frequency band except the bandwidth of the available frequency band is used as the bandwidth of the protection frequency band;
- the network side device determines a bandwidth other than the bandwidth of the minimum frequency of the protection band in the uplink frequency band as the maximum value of the available frequency band, and all the bandwidths that the system can support
- the bandwidth of the frequency band that is not greater than the maximum value of the available frequency band is selected as the bandwidth of the available frequency band, and the bandwidth of the uplink frequency band other than the bandwidth of the available frequency band is used as the bandwidth of the protection frequency band.
- the processor is further Used for:
- the processor is further Used for:
- the transceiver When the transceiver transmits the scheduling information of the downlink signal in the uplink frequency band, the information is received according to the payload size payload size corresponding to the determined width of the available frequency band.
- the embodiment of the present application sends a downlink signal to the user equipment in the available frequency band in the uplink frequency band, and does not send and receive any signal in the protection frequency band in the uplink frequency band.
- the protection frequency band is located in the high frequency part of the uplink frequency band. And / or low frequency part. Since no signal is transmitted and received on the guard band in the uplink frequency band, the communication interference to the adjacent frequency user equipment is reduced when the uplink frequency band is occupied, and the system performance is improved.
- FIG. 1 is a schematic structural diagram of a system for performing downlink transmission according to Embodiment 1 of the present application;
- FIG. 2 is a schematic diagram of different available transmission directions of the available resources according to Embodiment 2 of the present application;
- 3 is a schematic diagram of an uplink frequency band according to Embodiment 3 of the present application
- 4 is a schematic diagram of two uplink frequency bands according to Embodiment 4 of the present application
- FIG. 5 is a schematic diagram of three uplink frequency bands according to Embodiment 5 of the present application.
- FIG. 6 is a schematic diagram of a network side device in a system for performing downlink transmission according to Embodiment 6 of the present application
- FIG. 7 is a schematic diagram of user equipment in a system for downlink transmission according to Embodiment 7 of the present application
- FIG. 8 is a downlink transmission according to Embodiment 8 of the present application.
- FIG. 9 is a schematic diagram of a user equipment in a system for performing downlink transmission according to Embodiment 9 of the present application
- FIG. 10 is a schematic flowchart of a method for performing downlink transmission according to Embodiment 10 of the present application;
- FIG. 11 is a schematic flowchart of a method for performing downlink transmission according to Embodiment 11 of the present application. detailed description
- the embodiment of the present application sends a downlink signal to the user equipment in the available frequency band in the uplink frequency band, and does not send and receive any signal in the protection frequency band in the uplink frequency band.
- the protection frequency band is located in the high frequency part of the uplink frequency band. And / or low frequency part. Since no signal is transmitted and received on the guard band in the uplink frequency band, the communication interference to the adjacent frequency user equipment is reduced when the uplink frequency band is occupied, and the system performance is improved.
- the system for performing downlink transmission in Embodiment 1 of the present application includes:
- the network side device 10 is configured to determine an uplink frequency band for downlink transmission including a guard frequency band and an available frequency band; send a downlink signal to the user equipment on the available frequency band, and do not send and receive any signal on the guard frequency band;
- the user equipment 11 is configured to determine an uplink frequency band for downlink transmission including a protection frequency band and an available frequency band; receive a downlink signal sent by the network side device on the available frequency band, and do not send and receive any signal on the protection frequency band;
- the guard band is located in a high frequency portion and/or a low frequency portion of the uplink frequency band.
- the guard frequency band of the sufficient frequency band is reserved, so that the downlink signal sent by the network side device fading in the protection band to the interference tolerance threshold of the adjacent frequency, thereby occupying the uplink frequency band.
- the entire frequency band may be used for signal transmission; and for downlink transmission, only the available frequency band may be used for transmitting signals, and the edge frequency band is reserved as the protection frequency band for signal transmission, including data signals. All signals, reference signals, control signals.
- the available resources of the frequency band are different when corresponding to different signal transmission directions, as shown in Figure 2.
- each uplink frequency band can include a guard frequency band and an available frequency band.
- it may be determined according to the traffic demand, and the user equipment is notified after being determined by the network side device, and may also be specified in the protocol in advance.
- an uplink frequency band used for downlink transmission may have a protection frequency band, or may have two protection intervals, or may not have a protection interval.
- Case 1 An upstream frequency band for downlink transmission has two guard intervals.
- the frequency portion and the low frequency portion each have one of the guard bands.
- the bandwidth of the two guard intervals may be the same or different, but may not be less than the minimum value of the set guard band bandwidth.
- the network side device determines a bandwidth other than the bandwidth of the minimum protection band bandwidth of the uplink frequency band as the maximum value of the available frequency band, and the slave system can support A bandwidth of a frequency band not greater than the maximum value of the available frequency band is selected as the bandwidth of the available frequency band, and half of the bandwidth of the uplink frequency band except the bandwidth of the available frequency band is used as the bandwidth of the protected frequency band.
- the bandwidth of the uplink frequency band is A and the minimum bandwidth of the protection frequency band is B
- the maximum available frequency band is A-2B
- the bandwidth of the frequency band not greater than A-2B is selected from all the bandwidths that the system can support, for example, D.
- the bandwidth of the guard band is (AD) /2.
- the minimum value of the guard band bandwidth and the transmit power of the network side device and the signal in the guard band is related. In the implementation, it is required to ensure that the network side device signal is attenuated within the allowable range within the guard interval (such as the interference tolerance threshold of the adjacent frequency).
- the transmission power of the network side device is P
- the interference tolerance threshold of the adjacent frequency is P_MIN. Then, the downlink signal transmitted by the network side device needs to be attenuated in the protection frequency band.
- the uplink frequency band be A and the center frequency point be fO.
- the minimum bandwidth of the guard band required on both sides of the bandwidth is 8. That is, the range of the upstream frequency band is [fO-A/2, f0+A/2] o
- the UE and the network side device After determining that the downlink signal needs to be received in the uplink frequency band, the UE and the network side device determine the center frequency of the system and calculate the bandwidth of the downlink signal to be received.
- the specific process is as follows:
- the UE and the network side device determine that the center frequency and the uplink frequency band of the downlink frequency band of the transmitted signal in the system are the same.
- Communication system equipment can support multiple frequency bandwidth communication.
- the current LTE system supports six different frequency bandwidths: 1.4M, 3M, 5M, 10M, 15M, 20M.
- the bandwidth smaller than C is selected as the bandwidth of the downlink transmission.
- the maximum bandwidth less than C is selected as the bandwidth of the downlink transmission.
- the UE and the network side device select the downlink bandwidth as 10M, that is, the frequency band with the f0 as the center frequency point width of 10M as the available frequency band, the frequency band.
- the user equipment when the frequency band is used for uplink transmission, the user equipment sends an uplink signal according to the 20M bandwidth, and the network side device receives the signal on the corresponding 20M bandwidth; when the frequency band is used for downlink transmission, the network side device equipment follows the 10M bandwidth. Send the downlink signal, the user equipment is on the corresponding 10M bandwidth. receive signal.
- the frequency bands are adjacent, so that there is a guard interval for the uplink frequency band for downlink transmission.
- the uplink frequency band used for downlink transmission is adjacent to another uplink frequency band used for downlink transmission, and the uplink frequency band is the highest frequency band of all adjacent uplink frequency bands, the high frequency part of the uplink frequency band is One of the guard bands;
- the uplink frequency band used for downlink transmission is adjacent to another uplink frequency band for downlink transmission, and the uplink frequency band is the lowest frequency band of all adjacent uplink frequency bands, the low frequency portion of the uplink frequency band has one of the protection Frequency band.
- the guard intervals of each uplink frequency band including the guard interval may all be the same, may be different, or may be partially the same, but may not be less than the minimum value of the set guard band bandwidth.
- the network side device determines a bandwidth other than the bandwidth of the minimum frequency of the protection frequency band in the uplink frequency band as the maximum value of the available frequency band, and the slave system can support A bandwidth of the frequency band that is not greater than the maximum value of the available frequency band is selected as the bandwidth of the available frequency band, and a bandwidth other than the bandwidth of the available frequency band in the uplink frequency band is used as the bandwidth of the protection frequency band.
- the bandwidth of the uplink frequency band is A and the minimum bandwidth of the protection frequency band is B, the maximum available frequency band is AB, and the bandwidth of the frequency band not greater than AB is selected from all the bandwidths that the system can support, for example, D, the bandwidth of the protection frequency band is Is (AD) /2.
- the minimum bandwidth of the guard band is related to the transmit power of the network side device and the attenuation of the signal in the guard band. In the implementation, it is necessary to ensure that the network side device signal is attenuated within the guard interval within the guard interval (such as the interference tolerance threshold of the adjacent frequency).
- the two frequency bands used for downlink transmission are adjacent frequency bands, and only the high frequency part of the higher frequency band and the low frequency part of the lower frequency band need to leave the protection frequency band;
- the uplink frequency band used for downlink transmission is greater than or equal to three adjacent frequency bands, only the high frequency portion of the higher frequency band and the low frequency portion of the lower frequency band need to leave the protection frequency band.
- the frequency band can be used for transmitting downlink signals in the full frequency band.
- the transmit power of the network side device is P
- the interference tolerance threshold of the adjacent frequency is P_MIN
- the upstream band 1 have a width of A1 and the center frequency point be fl.
- the upstream band 2 has a width of A2 and a center frequency of £2.
- the minimum guard band width required on both sides of the bandwidth is B. That is, the range of the uplink frequency band 1 is [fl-Al/2, fl+Al/2], that is, the range of the uplink frequency band 2 is [-A2/2, f2+A2/2]
- the UE and the network side device After determining that the downlink signal needs to be received in the uplink frequency band, the UE and the network side device determine the center frequency of the system and calculate the bandwidth of the downlink signal to be received.
- the specific process is as follows:
- Communication system equipment can support multiple frequency bandwidth communication.
- the current LTE system supports six different frequency bandwidths: 1.4M, 3M, 5M, 10M, 15M, 20M.
- the bandwidth smaller than CI is selected as the bandwidth of the downlink transmission.
- the maximum bandwidth smaller than C1 is selected as the bandwidth of the downlink transmission.
- width ⁇ 5 ⁇ .
- the user equipment when the frequency band is used for uplink transmission, the user equipment sends an uplink signal according to the bandwidth of 20 ,, and the network side device receives the signal on the corresponding 20 ⁇ bandwidth; when the frequency band is used for downlink transmission, the network side device transmits according to the 15 M bandwidth. Downstream, the user equipment receives the signal on the corresponding 15M bandwidth.
- Communication system equipment can support multiple frequency bandwidth communication.
- the current LTE system supports six different frequency bandwidths: 1.4M, 3M, 5M, 10M, 15M, 20M.
- the bandwidth smaller than C2 is selected as the bandwidth of the downlink transmission.
- the maximum bandwidth less than C2 is selected as the bandwidth of the downlink transmission.
- band width B2' 5M.
- the user equipment when the frequency band is used for uplink transmission, the user equipment sends an uplink signal according to the 10M bandwidth, and the network side device receives the signal on the corresponding 10M bandwidth; when the frequency band is used for downlink transmission, the network side device sends according to the 5M bandwidth. Downstream, the user equipment receives the signal on the corresponding 5M bandwidth.
- the center frequency and the width of the available frequency band of the uplink frequency band 1 and the uplink frequency band 3 in the figure can be obtained according to the method of the uplink frequency band 1 and the uplink frequency band 2 in FIG. 4, and details are not described herein again.
- the center frequency and width of the uplink frequency band 2 in Figure 5 are the same as those in the uplink transmission, and remain unchanged.
- the network side device sends the reference signal, the data signal, and the like according to the selected available frequency band and the central frequency point; the user equipment receives the data signal according to the available frequency band, and performs channel measurement and channel quality reporting.
- the payload size of the scheduling information can be correspondingly reduced.
- the user equipment demodulates the scheduling information according to the corresponding payload size according to the downlink bandwidth.
- the network side device transmits the scheduling information of the downlink signal in the uplink frequency band
- the network side device sends the information according to the payload size corresponding to the determined width of the available frequency band
- the user equipment receives the information according to the payload size corresponding to the determined width of the available frequency band.
- the network side device since some signals are periodically reported, the network side device cannot ensure that the resources of the reported signals are still uplink when the available frequency band is selected as the downlink. Therefore, the reporting resources of the user equipment need to be adjusted.
- the network side device schedules the user equipment, and transmits uplink control information and/or a reference signal on other uplink frequency bands except the uplink frequency band used for downlink transmission;
- the user equipment transmits the uplink control information and/or the reference signal on other uplink frequency bands except the uplink frequency band for downlink transmission according to the scheduling of the network side device.
- Case 3 An upstream frequency band for downlink transmission has no guard interval.
- the frequency bands are adjacent, so that the uplink frequency band used for downlink transmission has no guard interval. For this case, see uplink frequency band 2 in Figure 5.
- the entire bandwidth is the available frequency band, and the center frequency is the same as when performing uplink transmission.
- the network side device in the system for performing downlink transmission in Embodiment 6 of the present application includes: a determining module 610 and a transmitting module 620.
- a determining module 610 configured to determine an uplink frequency band for downlink transmission including a guard frequency band and an available frequency band;
- the transmission module 620 is configured to send a downlink signal to the user equipment on the available frequency band, and not send and receive any signal on the protection frequency band;
- the guard band is located in a high frequency portion and/or a low frequency portion of the uplink frequency band. Adjacent, the high frequency part and the low frequency part of the uplink frequency band each have one of the protection frequency bands;
- the uplink frequency band used for downlink transmission is adjacent to another uplink frequency band for downlink transmission, and the uplink frequency band is the highest frequency band of all adjacent uplink frequency bands, the high frequency portion of the uplink frequency band has one of the Protection band If the uplink frequency band used for downlink transmission is adjacent to another uplink frequency band for downlink transmission, and the uplink frequency band is the lowest frequency band of all adjacent uplink frequency bands, the low frequency portion of the uplink frequency band has one of the protection Frequency band.
- the determining module 610 is specifically configured to determine, according to the following manner, a bandwidth of the guard band in the uplink frequency band and a bandwidth of the available frequency band:
- the network side device determines a bandwidth other than the bandwidth of the minimum protection band bandwidth of the uplink frequency band as the maximum value of the available frequency band, and the slave system can support One of the bandwidths of the plurality of frequency bands is selected as the bandwidth of the available frequency band, and half of the bandwidth of the uplink frequency band other than the bandwidth of the available frequency band is used as the bandwidth of the protection frequency band;
- the network side device determines a bandwidth other than the bandwidth of the minimum frequency of the protection band in the uplink frequency band as the maximum value of the available frequency band, and all the bandwidths that the system can support
- the bandwidth of the frequency band that is not greater than the maximum value of the available frequency band is selected as the bandwidth of the available frequency band, and the bandwidth of the uplink frequency band other than the bandwidth of the available frequency band is used as the bandwidth of the protection frequency band.
- the transmission module 620 is further configured to: transmit uplink control information and/or a reference signal on a frequency band.
- the transmission module 620 is further configured to:
- the scheduling information of the downlink signal is transmitted in the uplink frequency band
- the information is transmitted according to the ayload size corresponding to the determined width of the available frequency band.
- the user equipment in the system for performing downlink transmission in Embodiment 7 of the present application includes: a determining module 710 and a transmitting module 720.
- a determining module 710 configured to determine an uplink frequency band for downlink transmission including a guard frequency band and an available frequency band;
- the transmitting module 720 is configured to receive, on an available frequency band, a downlink signal sent by the network side device, and do not send and receive any signal on the guard band;
- the guard band is located in a high frequency portion and/or a low frequency portion of the uplink frequency band. Adjacent, the high frequency part and the low frequency part of the uplink frequency band each have one of the protection frequency bands;
- the uplink frequency band used for downlink transmission is adjacent to another uplink frequency band for downlink transmission, and the uplink frequency band is the highest frequency band of all adjacent uplink frequency bands, the high frequency portion of the uplink frequency band has one of the Protection band
- the uplink frequency band used for downlink transmission is adjacent to another uplink frequency band for downlink transmission, and the uplink frequency band is the lowest frequency band of all adjacent uplink frequency bands, the low frequency portion of the uplink frequency band has one of the protection Frequency band.
- the determining module 710 is specifically configured to determine, according to the following manner, a bandwidth of the guard band in the uplink frequency band and a bandwidth of the available frequency band:
- the network side device determines a bandwidth other than the bandwidth of the minimum protection band bandwidth of the uplink frequency band as the maximum value of the available frequency band, and the slave system can support One of the bandwidths of the plurality of frequency bands is selected as the bandwidth of the available frequency band, and half of the bandwidth of the uplink frequency band other than the bandwidth of the available frequency band is used as the bandwidth of the protection frequency band;
- the network side device determines a bandwidth other than the bandwidth of the minimum frequency of the protection band in the uplink frequency band as the maximum value of the available frequency band, and all the bandwidths that the system can support
- the bandwidth of the frequency band that is not greater than the maximum value of the available frequency band is selected as the bandwidth of the available frequency band, and the bandwidth of the uplink frequency band other than the bandwidth of the available frequency band is used as the bandwidth of the protection frequency band.
- the transmission module 720 is further configured to:
- the transmission module 720 is further configured to:
- the network side device in the system for performing downlink transmission in the eighth embodiment of the present application includes: a processor 800, configured to determine an uplink frequency band for downlink transmission including a guard frequency band and an available frequency band, which is used by the transceiver 810. Sending downlink signals to user equipment in the available frequency bands, and not transmitting and receiving any signals on the guard frequency bands;
- the transceiver 810 is configured to receive and transmit data under the control of the processor 800.
- the guard band is located in a high frequency portion and/or a low frequency portion of the uplink frequency band. Adjacent, the high frequency part and the low frequency part of the uplink frequency band each have one of the protection frequency bands;
- the uplink frequency band used for downlink transmission is adjacent to another uplink frequency band for downlink transmission, and the uplink frequency band is the highest frequency band of all adjacent uplink frequency bands, the high frequency portion of the uplink frequency band has one of the Protection band
- the uplink frequency band used for downlink transmission is adjacent to another uplink frequency band for downlink transmission, and the uplink frequency band is the lowest frequency band of all adjacent uplink frequency bands, the low frequency portion of the uplink frequency band has one of the protection Frequency band.
- the processor 800 is specifically configured to determine, according to the following manner, a bandwidth of the guard band in the uplink frequency band and a bandwidth of the available frequency band:
- the network side device determines a bandwidth other than the bandwidth of the minimum protection band bandwidth of the uplink frequency band as the maximum value of the available frequency band, and the slave system can support One of the bandwidths of the plurality of frequency bands is selected as the bandwidth of the available frequency band, and half of the bandwidth of the uplink frequency band other than the bandwidth of the available frequency band is used as the bandwidth of the protection frequency band;
- the network side device determines a bandwidth other than the bandwidth of the minimum frequency of the protection band in the uplink frequency band as the maximum value of the available frequency band, and all the bandwidths that the system can support
- the bandwidth of the frequency band that is not greater than the maximum value of the available frequency band is selected as the bandwidth of the available frequency band, and the bandwidth of the uplink frequency band other than the bandwidth of the available frequency band is used as the bandwidth of the protection frequency band.
- the processor 800 is further configured to: The user equipment is scheduled by the transceiver 810 to transmit uplink control information and/or reference signals on other uplink frequency bands than the uplink frequency band for downlink transmission.
- the processor 800 is further configured to:
- the transceiver When the transceiver transmits the scheduling information of the downlink signal in the uplink frequency band, the information is transmitted according to the payload size corresponding to the determined width of the available frequency band.
- the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 800 and various circuits of memory represented by memory 820.
- 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 810 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
- the processor 800 is responsible for managing the bus architecture and general processing, and the memory 820 can store data used by the processor 800 in performing operations.
- the processor 800 is responsible for managing the bus architecture and the usual processing, and the memory 820 can store the data used by the processor 800 in performing the operations.
- the user equipment in the system for downlink transmission in the ninth embodiment of the present application includes: a processor 900, configured to determine an uplink frequency band for downlink transmission including a guard frequency band and an available frequency band, which is available through the transceiver 910. Receiving downlink signals sent by the network side device in the frequency band, and not transmitting and receiving any signals on the guard frequency band;
- the transceiver 910 is configured to receive and transmit data under the control of the processor 900.
- the guard band is located in a high frequency portion and/or a low frequency portion of the uplink frequency band. Adjacent, the high frequency part and the low frequency part of the uplink frequency band each have one of the protection frequency bands;
- the uplink frequency band used for downlink transmission is adjacent to another uplink frequency band for downlink transmission, and the uplink frequency band is the highest frequency band of all adjacent uplink frequency bands, the high frequency portion of the uplink frequency band has one of the Protection band
- the uplink frequency band used for downlink transmission is adjacent to another uplink frequency band used for downlink transmission, And the uplink frequency band is the lowest frequency band of all adjacent uplink frequency bands, and the low frequency part of the uplink frequency band has one of the protection frequency bands.
- the processor 900 is specifically configured to determine, according to the following manner, a bandwidth of the guard band in the uplink frequency band and a bandwidth of the available frequency band:
- the network side device determines a bandwidth other than the bandwidth of the minimum protection band bandwidth of the uplink frequency band as the maximum value of the available frequency band, and the slave system can support One of the bandwidths of the plurality of frequency bands is selected as the bandwidth of the available frequency band, and half of the bandwidth of the uplink frequency band other than the bandwidth of the available frequency band is used as the bandwidth of the protection frequency band;
- the network side device determines a bandwidth other than the bandwidth of the minimum frequency of the protection band in the uplink frequency band as the maximum value of the available frequency band, and all the bandwidths that the system can support
- the bandwidth of the frequency band that is not greater than the maximum value of the available frequency band is selected as the bandwidth of the available frequency band, and the bandwidth of the uplink frequency band other than the bandwidth of the available frequency band is used as the bandwidth of the protection frequency band.
- the processor 900 is further configured to:
- the processor 900 is further configured to:
- the transceiver When the transceiver transmits the scheduling information of the downlink signal in the uplink frequency band, the information is received according to the payload size corresponding to the determined width of the available frequency band.
- 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 receiver, providing means for communicating with various other devices on a transmission medium.
- the user interface 930 may also be an interface capable of externally connecting the required devices. Connected devices include, but are not limited to, keypads, displays, speakers, microphones, joysticks, and the like.
- 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.
- the method for performing downlink transmission is separately provided in the embodiment of the present application, and the device corresponding to the method is a device in a system for performing downlink transmission in the embodiment of the present application, and the principle of the method for solving the problem is similar to the system. Therefore, the implementation of the method can be referred to the implementation of the corresponding device in the system, and the repeated description is not repeated.
- the method for performing downlink transmission in Embodiment 10 of the present application includes:
- Step 1010 The network side device determines, according to the protection frequency band and the available frequency band, an uplink frequency band for downlink transmission;
- Step 1020 The network side device sends a downlink signal to the user equipment in the available frequency band, and does not send and receive any signal on the guard frequency band.
- the guard band is located in a high frequency portion and/or a low frequency portion of the uplink frequency band. Adjacent, the high frequency part and the low frequency part of the uplink frequency band each have one of the protection frequency bands;
- the uplink frequency band used for downlink transmission is adjacent to another uplink frequency band for downlink transmission, and the uplink frequency band is the highest frequency band of all adjacent uplink frequency bands, the high frequency portion of the uplink frequency band has one of the Protection band
- the uplink frequency band used for downlink transmission is adjacent to another uplink frequency band for downlink transmission, and the uplink frequency band is the lowest frequency band of all adjacent uplink frequency bands, the low frequency portion of the uplink frequency band has one of the protection Frequency band.
- Bandwidth of the band and bandwidth of the available band are the following:
- the network side device determines a bandwidth other than the bandwidth of the minimum protection band bandwidth of the uplink frequency band as the maximum value of the available frequency band, and the slave system can support A bandwidth of a frequency band not greater than a maximum value of the available frequency band is selected as a bandwidth of the available frequency band, and a bandwidth of the uplink frequency band other than the available frequency band is used. Half of the bandwidth is used as the bandwidth of the guard band;
- the network side device determines a bandwidth other than the bandwidth of the minimum frequency of the protection band in the uplink frequency band as the maximum value of the available frequency band, and all the bandwidths that the system can support
- the bandwidth of the frequency band that is not greater than the maximum value of the available frequency band is selected as the bandwidth of the available frequency band, and the bandwidth of the uplink frequency band other than the bandwidth of the available frequency band is used as the bandwidth of the protection frequency band.
- the network side device determines the uplink frequency band for the downlink transmission including the protection frequency band and the available frequency band, the network side device further includes:
- the network side device schedules the user equipment to transmit uplink control information and/or a reference signal on other uplink frequency bands except the uplink frequency band used for downlink transmission.
- the network side device determines the uplink frequency band for the downlink transmission including the protection frequency band and the available frequency band, the network side device further includes:
- the network side device When the network side device transmits the scheduling information of the downlink signal in the uplink frequency band, the network side device sends the information according to the payload size corresponding to the determined width of the available frequency band.
- the method for performing downlink transmission in Embodiment 11 of the present application includes:
- Step 1110 The user equipment determines an uplink frequency band for downlink transmission including a guard frequency band and an available frequency band;
- Step 1120 The user equipment receives a downlink signal sent by the network side device on an available frequency band, and does not send and receive any signal on the protection frequency band.
- the guard band is located in a high frequency portion and/or a low frequency portion of the uplink frequency band. Adjacent, the high frequency part and the low frequency part of the uplink frequency band each have one of the protection frequency bands;
- the uplink frequency band used for downlink transmission is adjacent to another uplink frequency band for downlink transmission, and the uplink frequency band is the highest frequency band of all adjacent uplink frequency bands, the high frequency portion of the uplink frequency band has one of the Protection band
- the uplink frequency band used for downlink transmission is adjacent to another uplink frequency band used for downlink transmission, and the uplink frequency band is the lowest frequency band of all adjacent uplink frequency bands, the low frequency band of the uplink frequency band Some have one of the guard bands.
- the network side device determines a bandwidth other than the bandwidth of the minimum protection band bandwidth of the uplink frequency band as the maximum value of the available frequency band, and the slave system can support One of the bandwidths of the plurality of frequency bands is selected as the bandwidth of the available frequency band, and half of the bandwidth of the uplink frequency band other than the bandwidth of the available frequency band is used as the bandwidth of the protection frequency band;
- the network side device determines a bandwidth other than the bandwidth of the minimum frequency of the protection band in the uplink frequency band as the maximum value of the available frequency band, and all the bandwidths that the system can support
- the bandwidth of the frequency band that is not greater than the maximum value of the available frequency band is selected as the bandwidth of the available frequency band, and the bandwidth of the uplink frequency band other than the bandwidth of the available frequency band is used as the bandwidth of the protection frequency band.
- the method further includes:
- the user equipment transmits uplink control information and/or a reference signal on other uplink frequency bands except the uplink frequency band for downlink transmission according to the scheduling of the network side device.
- the method further includes:
- the user equipment When the user equipment transmits the scheduling information of the downlink signal in the uplink frequency band, the user equipment receives the information according to the payload size corresponding to the determined width of the available frequency band.
- embodiments of the present application can be provided as a method, system, or computer program product.
- the application can be in the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware.
- the application can be in 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.) in which computer usable program code is embodied.
- the present application is made with reference to a method, a device (system), and a computer program according to an embodiment of the present application.
- the flow chart and/or block diagram of the product is described. 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.
- 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.
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JP2016544835A JP6382994B2 (ja) | 2014-01-07 | 2014-01-07 | ダウンリンク送信のための方法、システム、および装置 |
PCT/CN2014/070246 WO2015103734A1 (zh) | 2014-01-07 | 2014-01-07 | 一种进行下行传输的方法、系统和设备 |
KR1020167021103A KR101765738B1 (ko) | 2014-01-07 | 2014-01-07 | 다운링크 송신 위한 방법, 시스템 및 디바이스 |
CN201480000364.8A CN105009622B (zh) | 2014-01-07 | 2014-01-07 | 一种进行下行传输的方法、系统和设备 |
EP14877997.8A EP3082357B1 (en) | 2014-01-07 | 2014-01-07 | Methods and devices for performing downlink transmission |
US15/203,940 US10237748B2 (en) | 2014-01-07 | 2016-07-07 | Method, system, and device for downlink transmission |
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US10779277B2 (en) * | 2016-07-07 | 2020-09-15 | Qualcomm Incorporated | General authorized access (GAA) primary channel assignment for multiple operators |
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US11546917B2 (en) * | 2019-12-13 | 2023-01-03 | Qualcomm Incorporated | Interference mitigation scheme for asynchronous time division duplex |
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JP2002112326A (ja) | 2000-10-02 | 2002-04-12 | Ntt Docomo Inc | 無線リソース割当方法及び基地局装置 |
JP4982409B2 (ja) * | 2008-03-06 | 2012-07-25 | 株式会社エヌ・ティ・ティ・ドコモ | 無線通信装置及び方法 |
EP2286519A4 (en) * | 2008-06-13 | 2014-12-03 | Rajiv Mehrotra | PROCEDURE AND ARCHITECTURE FOR PAIRING SAFETY BAND FREQUENCIES FOR THE PERFORMANCE OF GSM, CDMA, UMTS AND WCDMA SERVICES |
US9232478B2 (en) * | 2012-03-02 | 2016-01-05 | Qualcomm Incorporated | Frequency scan method for determining the system center frequency for LTE TDD |
US20140274193A1 (en) * | 2013-03-15 | 2014-09-18 | Wilson Electronics, Llc | Out-of-band noise and overload protection |
US8803635B1 (en) * | 2013-03-15 | 2014-08-12 | Wilson Electronics, Llc | Filter isolation using a circulator |
WO2014178852A1 (en) * | 2013-04-30 | 2014-11-06 | Empire Technology Development Llc | Hybrid fdd/tdd wireless network |
US20150029909A1 (en) * | 2013-07-25 | 2015-01-29 | Wilson Electronics, Llc | Bi-directional signal booster |
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CN101155385A (zh) * | 2006-09-29 | 2008-04-02 | 中兴通讯股份有限公司 | 具有改进的频谱使用方式的通信系统 |
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CN105009622B (zh) | 2020-02-14 |
KR101765738B1 (ko) | 2017-08-07 |
CN105009622A (zh) | 2015-10-28 |
US10237748B2 (en) | 2019-03-19 |
EP3082357B1 (en) | 2019-07-03 |
KR20160105512A (ko) | 2016-09-06 |
JP6382994B2 (ja) | 2018-08-29 |
EP3082357A4 (en) | 2016-11-30 |
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