WO2014008735A1 - Procédé et dispositif pour transmission multipoint coordonnée dans une cellule à multiples unités radio distantes - Google Patents

Procédé et dispositif pour transmission multipoint coordonnée dans une cellule à multiples unités radio distantes Download PDF

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Publication number
WO2014008735A1
WO2014008735A1 PCT/CN2012/085610 CN2012085610W WO2014008735A1 WO 2014008735 A1 WO2014008735 A1 WO 2014008735A1 CN 2012085610 W CN2012085610 W CN 2012085610W WO 2014008735 A1 WO2014008735 A1 WO 2014008735A1
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rru
comp
cooperative
target
data
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PCT/CN2012/085610
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English (en)
Chinese (zh)
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董伟
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华为技术有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H04W88/085—Access point devices with remote components

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and apparatus for multi-radio remote unit co-cell coordinated multi-point transmission. Background technique
  • the radio remote unit (RRU) common cell combines multiple RRU coverage cells into the same cell, so that the handover area between the multiple cells becomes the same cell relay point, and the handover is reduced.
  • the coverage distance of the single station is increased, the probability of cell reselection and cell handover of the user equipment (User Equipment, UE) in the network is reduced, the success rate of the terminal user is improved, the probability of dropped calls is reduced, and the user experience and network quality are effectively improved.
  • the RRUs that receive the UE information measure the uplink signal to interference and noise ratio of the UE (S ignab to-Interference plus noisy Se Ra io, S INR).
  • S ignab to-Interference plus noisy Se Ra io, S INR The RRU with the largest S INR is selected to serve the UE, and the information sent by the UE is received and demodulated.
  • Embodiments of the present invention provide a method and apparatus for multi-radio remote unit co-cell coordinated multi-point transmission, which can improve uplink demodulation performance and reduce user drop rate.
  • an embodiment of the present invention provides a method for multi-radio remote unit co-cell coordinated multi-point transmission, including: Determining a target RRU of the user equipment according to the at least two radio remote unit RRUs of the same base station; determining a cooperative RRU of the user equipment according to the target RRU and an RRU other than the target RRU;
  • Coordinated multi-point transmission CoMP equalization processing is performed on the received user data by the target RRU and the cooperative RRU to obtain demodulated data of the user equipment.
  • determining the target RRU of the user equipment according to the at least two RRUs of the same base station includes: acquiring an uplink signal to interference and noise ratio S INR measured by at least two RRUs of the same base station; determining the uplink SINR The RRU corresponding to the largest uplink SINR is the target RRU of the user equipment.
  • the determining, according to the target RRU and the RRUs other than the target RRU, the cooperative RRU of the user equipment includes: receiving, according to the target RRU, an uplink reference signal received power RSRP And an uplink RSRP measured by the RRU other than the target RRU, determining a cooperative RRU of the user equipment; or, an uplink SINR measured according to the target RRU and an uplink SINR measured by an RRU other than the target RRU, A collaborative RRU of the user equipment is determined.
  • an embodiment of the present invention provides a multi-radio remote unit co-cell coordinated multi-point transmission apparatus, including:
  • a processor configured to determine a target RRU of the user equipment according to the at least two radio remote unit RRUs; and determine a cooperative RRU of the user equipment according to the target RRU and an RRU other than the target RRU;
  • the target RRU is configured to perform cooperative multi-point transmission CoMP equalization processing on the received user data in cooperation with the cooperative RRU.
  • the processor is configured to: acquire an uplink signal to interference and noise ratio SINR measured by at least two RRUs; and determine that the RRU corresponding to the largest uplink S INR of the uplink SINR is a target RRU of the user equipment. .
  • the processor includes: a first determining module, configured to determine, according to an uplink RSRP measured by the target RRU and an uplink RSRP measured by an RRU other than the target RRU, a cooperative RRU of the device, or a second determining module, configured to determine, according to an uplink SINR measured by the target RRU and an uplink S INR measured by an RRU other than the target RRU A collaborative RRU for the user device.
  • An embodiment of the present invention provides a method and a device for co-cell coordinated multi-point transmission of a multi-radio remote unit, which determines a target RRU of a user equipment according to at least two radio remote units RRU of the same base station; Determining a cooperative RRU of the user equipment by the RRU other than the target RRU; performing cooperative multi-point transmission CoMP equalization processing on the received user data by the target RRU and the cooperative RRU, to obtain the user equipment Demodulate data.
  • the signal in the edge overlap region covered by the plurality of RRUs is relatively poor, resulting in poor uplink demodulation performance, and the user drop rate is higher.
  • This embodiment passes the target RRU. Combined with the cooperative RRU, it can improve the uplink demodulation performance and reduce the user drop rate.
  • FIG. 1 is a flowchart of a method for multi-radio remote unit co-cell coordinated multi-point transmission according to Embodiment 1 of the present invention
  • FIG. 2 is a block diagram of an apparatus for multi-radio remote unit co-cell coordinated multi-point transmission according to Embodiment 1 of the present invention
  • FIG. 3 is a flowchart of a method for determining a cooperative RRU according to Embodiment 2 of the present invention
  • FIG. 4 is a flowchart of another method for determining a cooperative RRU according to Embodiment 2 of the present invention
  • 2 provides a schematic diagram of performing CoMP equalization processing on the received user data by the target RRU and the cooperative RRU;
  • FIG. 6 is another schematic diagram of performing CoMP equalization processing on the received user data by the target RRU and the cooperative RRU according to Embodiment 2 of the present invention
  • Figure ⁇ is another schematic diagram of the target RRU and the cooperative RRU providing CoMP equalization processing on the received user data according to Embodiment 2 of the present invention
  • FIG. 8 is a multi-radio remote unit co-cell coordinated multi-point transmission according to Embodiment 2 of the present invention. A block diagram of the device. detailed description
  • the embodiment of the present invention provides a method for co-cell coordinated multi-point transmission of a multi-radio remote unit, where the main body of the method is a base station, as shown in FIG. 1, the method includes the following steps:
  • Step 101 Determine, according to at least two radio remote unit RRUs of the same base station, a target RRU of the user equipment;
  • At least two RRUs are configured as the same logical cell, that is, at least two RRUs belong to the same base station, and at least the target RRU and the coordinated RRU are included.
  • the uplink signal to interference and noise ratio S INR measured by the RRU of the at least two radio remote unit of the same base station is obtained; and the RRU corresponding to the largest uplink S INR of the uplink S INR is determined to be the target RRU of the user equipment.
  • Step 102 Determine a cooperative RRU of the user equipment according to the target RRU and an RRU other than the target RRU.
  • the determining, according to the absolute value of the difference, the cooperative RRU of the user equipment includes the following methods:
  • an absolute value of the at least two of the difference values is less than or equal to a preset CoMP (Coordina ted Mul t i-Po int ransmi ss ion coordinated multipoint transmission) threshold, and at least two of the difference values
  • CoMP Coordina ted Mul t i-Po int ransmi ss ion coordinated multipoint transmission
  • the RRUs corresponding to the absolute values of the at least two of the difference values are RRUs of different antenna numbers, according to at least two of the difference values
  • the uplink S INR measured by the RRU corresponding to the absolute value determining that the RRU corresponding to the maximum uplink SINR is the cooperative RRU of the user equipment
  • the user equipment When all the absolute values of the difference are greater than a preset CoMP threshold, the user equipment is a non-CoMP user, and the processing flow is exited.
  • determining a cooperative RRU of the user equipment according to an uplink SINR of the target RRU and an uplink SINR measured by the RRU other than the target RRU.
  • Step 103 Coordinate multi-point transmission CoMP equalization processing on the received user data by the target RRU and the cooperative RRU to obtain demodulated data of the user equipment.
  • the cooperative RRU in the base station performs discrete Fourier transform DFT processing on the received user data, and the obtained first CoMP Data is sent to the target RRU in the base station;
  • the target RRU performs DFT processing on the received user data, obtains second CoMP data, and performs interference suppression combining processing on the first CoMP data and the second CoMP data.
  • the cooperative RRU in the base station performs DFT processing on the user data received by the preset number of antennas, and the third CoMP to be obtained is obtained.
  • Data is sent to the target RRU in the base station; the target RRU performs DFT processing on the received user data, obtains second CoMP data, and the third CoMP number Interference suppression combining processing according to the second CoMP data; or
  • the target RRU in the base station performs DFT processing on the received user data, and sends the obtained second CoMP data to the cooperative RRU in the base station; the cooperative RRU receives the preset number of antennas. Performing DFT processing on the user data, obtaining third CoMP data, and performing interference suppression combining processing on the third CoMP data and the second CoMP data; or
  • the cooperative RRU in the base station sequentially performs DFT processing, interference suppression combining processing, and discrete inverse Fourier transform IDFT on the received user data.
  • the embodiment of the invention provides a method for co-cell coordinated multi-point transmission of a multi-radio remote unit, which determines a target RRU and a cooperative RRU, and then the target RRU and the cooperative RRU jointly perform cooperative multi-point transmission CoMP equalization on the received user data. Processing can improve the uplink demodulation performance and reduce the user drop rate.
  • the embodiment of the present invention provides a device for co-cell coordinated multi-point transmission of a multi-radio remote unit, and the device may be a base station.
  • the device includes: a processor 201, a target RRU 202, and a cooperative RRU 203;
  • the processor 201 is configured to determine a target RRU of the user equipment according to the at least two radio remote unit RRUs, and determine a cooperative RRU of the user equipment according to the target RRU and an RRU other than the target RRU;
  • At least two RRUs are configured as the same logical cell, that is, at least two RRUs belong to the same base station, and at least the target RRU and the coordinated RRU are included.
  • the processor 201 is configured to: obtain an uplink signal to interference and noise ratio uplink S INR measured by at least two RRUs; and determine that the RRU corresponding to the largest uplink S INR of the uplink S INR is a target RRU of the user equipment. .
  • the first determining module in the processor 201 is configured to detect according to the target RRU The uplink RSRP of the quantity and the uplink RSRP of the RRU measurement except the target RRU, the coordinated RRU of the user equipment is determined; or the second determining module of the processor 201 is configured to measure according to the target RRU The uplink SINR and the uplink SINR measured by the RRU other than the target RRU determine the cooperative RRU of the user equipment.
  • the calculation submodule in the first determining module is configured to separately calculate an absolute value of a difference between an uplink RSRP measured by the target RRU and an uplink RSRP measured by each RRU except the target RRU; Determining a sub-module in the first determining module, configured to determine a cooperative RRU of the user equipment according to an absolute value of the difference value.
  • determining submodule is used to:
  • the RRU corresponding to the absolute value of the smallest difference among the absolute values is a cooperative RRU of the user equipment; and when the absolute values of the at least two of the differences are less than or equal to a preset CoMP threshold, and at least two of the differences
  • the RRU corresponding to the absolute value is an RRU of a different number of antennas, determining, according to the uplink SINR measured by the RRU corresponding to the absolute value of the at least two differences, the RRU corresponding to the maximum uplink SINR is the cooperative RRU of the user equipment;
  • the user equipment is a non-CoMP user, and the processing flow is exited.
  • the calculation submodule in the second determining module is configured to separately calculate a difference between an uplink SINR measured by the target RRU and an uplink SINR measured by an RRU other than the target RRU; the second determining a determining submodule in the module, configured to determine, according to the uplink S INR measured by the RRU corresponding to the difference, an RRU corresponding to the maximum uplink SINR, when the difference is less than or equal to a preset uplink SINR difference threshold A collaborative RRU for the user device.
  • the target RRU 202 is configured to perform cooperative multi-point transmission CoMP equalization processing on the received user data in cooperation with the cooperative RRU 203. Further, when the target RRU 202 and the cooperative RRU 203 are RRUs of the same number of antennas, the cooperative RRU 203 is configured to perform discrete Fourier transform DFT processing on the received user data, and obtain the first CoMP data. Send to the target RRU 202;
  • the target RRU 202 is configured to perform DFT processing on the received user data, obtain second CoMP data, and perform interference suppression combining processing on the first CoMP data and the second CoMP data.
  • the cooperative RRU 203 is configured to perform DFT processing on user data received by a preset number of antennas, and obtain third CoMP data.
  • the target RRU 202 is configured to perform DFT processing on the received user data, obtain second CoMP data, and perform interference suppression combining processing on the third CoMP data and the second CoMP data.
  • the target RRU 202 is configured to perform DFT processing on the received user data, and send the obtained second CoMP data to the cooperative RRU 203.
  • the cooperative RRU 203 is configured to receive user data of a preset number of antennas. Performing DFT processing, obtaining third CoMP data, and performing interference suppression combining processing on the third CoMP data and the second CoMP data; or
  • the cooperative RRU 203 is configured to sequentially perform DFT processing, interference suppression combining processing, and discrete Fourier transform IDFT on the received user data, obtain fifth CoMP data, and send the fifth CoMP data to the a target RRU 202, configured to sequentially perform DFT processing, interference suppression combining processing, and IDFT on the received user data, and obtain sixth CoMP data; and the fifth CoMP data and the sixth CoMP data. Perform maximum ratio combining processing.
  • target RRU 202 and the cooperative RRU 203 may exist independently as two devices, but the target RRU 202 and the cooperative RRU 203 belong to one base station.
  • An embodiment of the present invention provides a device for co-cell coordinated multi-point transmission of a multi-radio remote unit, where the processor is configured to determine a target RRU of the user equipment according to at least two radio remote units RRU of the same base station; a target RRU and an RRU other than the target RRU, determining a coordinated RRU of the user equipment; the target RRU, configured to perform cooperative multi-point transmission CoMP equalization processing on the received user data jointly with the cooperative RRU, It can improve the uplink demodulation performance and reduce the user drop rate.
  • the processor is configured to determine a target RRU of the user equipment according to at least two radio remote units RRU of the same base station; a target RRU and an RRU other than the target RRU, determining a coordinated RRU of the user equipment; the target RRU, configured to perform cooperative multi-point transmission CoMP equalization processing on the received user data jointly with the cooperative RRU, It can improve the uplink demodulation performance and reduce the user drop rate.
  • the embodiment of the present invention provides a method for co-cell coordinated multi-point transmission of a multi-radio remote unit, and the execution subject of the method is a base station.
  • the method includes:
  • Step 101 Determine, according to at least two radio remote unit RRUs of the same base station, a target RRU of the user equipment;
  • At least two RRUs are configured as the same logical cell, that is, at least two RRUs belong to the same base station, and at least the target RRU and the coordinated RRU are included.
  • the uplink SINR measured by the RRU of the same base station is obtained.
  • the RRU corresponding to the largest uplink SINR of the uplink SINR is determined to be the target RRU of the user equipment.
  • Step 102 The base station determines, according to the target RRU and an RRU other than the target RRU, a cooperative RRU of the user equipment.
  • This step can determine the collaborative RRU in the following two ways:
  • Manner 1 The coordinated RRU of the user equipment is determined according to the uplink reference signal received power (RSRP) measured by the target RRU and the uplink RSRP measured by the RRU other than the target RRU. As shown in Figure 3, the following steps are included:
  • RSRP uplink reference signal received power
  • Step 301 Obtain an uplink RSRP measured by the target RRU, and record it as RSRP ( 0 );
  • Step 304 determining whether D [i] is greater than a preset CoMP threshold
  • the preset CoMP threshold can be 6dB or 10dB.
  • Step 305 When D [i] is greater than a preset CoMP threshold, the user equipment is a non-CoMP user, and the processing flow is exited; Step 306, when D[i] is less than or equal to the preset CoMP threshold, determine whether the RRU corresponding to D[i] is an RRU of the same number of antennas;
  • the RRUs that meet the preset CoMP threshold are at least two, it is necessary to further determine whether the RRU corresponding to D[i] is the same number of RRUs; when the RRU that meets the preset CoMP threshold is only one Then, directly determine that the one RRU that satisfies the condition is a cooperative RRU.
  • Step 307 when the RRU corresponding to D[i] is the RRU of the same number of antennas, determining that the RRU corresponding to the absolute value of the minimum difference in D[i] is the cooperative RRU of the user equipment;
  • the RRU of the same number of antennas may be an RRU of 2 antennas, or may be an RRU of 8 antennas.
  • the RRUs of different antenna numbers may be an RRU of 2 antennas and an RRU of 8 antennas.
  • Manner 2 an uplink SINR measured according to the target RRU and other than the target RRU
  • the uplink SINR measured by the RRU determines the cooperative RRU of the user equipment; as shown in FIG. 4, the following steps are included:
  • Step 401 Calculate, respectively, a difference between an uplink SINR measured by the target RRU and an uplink SINR measured by an RRU other than the target RRU.
  • Step 402 Determine whether the calculated difference is less than or equal to a preset uplink SINR difference threshold.
  • Step 403 When the difference is less than or equal to the preset uplink SINR difference threshold, determine, according to the uplink SINR measured by the RRU corresponding to the difference, that the RRU corresponding to the maximum uplink SINR is the coordinated RRU of the user equipment.
  • Step 404 When the difference is greater than a preset uplink SINR difference threshold, the user equipment is a non-CoMP user, and the processing flow is exited.
  • Step 103 Perform cooperative multi-point transmission CoMP equalization processing on the received user data according to the target RRU and the cooperative RRU, to obtain demodulated data of the user equipment.
  • the following two equalization schemes can be adopted according to the number of antennas of the target RRU and the cooperative RRU:
  • the cooperative RRU performs user data received by the two antennas.
  • Discrete Fourier transform DFT processing that is, converting time domain data to the frequency domain, obtaining first CoMP data, and transmitting the obtained first CoMP data to the target RRU;
  • the target RRU While the cooperative RRU processes the received user data, the target RRU performs DFT processing on the user data received by the two antennas to obtain second CoMP data, and the target RRU receives the first CoMP data sent by the cooperative RRU, and CoMP said first data and said second data CoMP system combined interference ⁇ 7 (interference Rejection Combining, IRC) process, i.e., the antenna 14 ⁇ RRU IRC joint equalization.
  • IRC interference Rejection Combining
  • the target RRU sequentially performs Inverse Discrete Fourier Transform (IDFT), Quadrature Amplitude Modulation (QAM), deinterleave operation, and hybrid automatic repeat request.
  • IDFT Inverse Discrete Fourier Transform
  • QAM Quadrature Amplitude Modulation
  • HARQ Hybrid Automatic Requestor
  • the target RRU and the cooperative RRU are RRUs of different antenna numbers, for example, the target RRU is a 2-antenna RRU, and the cooperative RRU is an 8-antenna RRU. As shown in FIG. 6, the cooperative RRU will be preset.
  • the user data received by the antenna is subjected to DFT processing, that is, the time domain data is converted into the frequency domain, and optionally, the user data received by the optional 6 antennas of the 8 antenna RRU is subjected to DFT processing to obtain the third CoMP data;
  • the obtained third CoMP data is sent to the target RRU; while the cooperative RRU performs DFT processing on the received user data, the target RRU performs DFT processing on the user data received by the two antennas to obtain the second CoMP data;
  • the target RRU performs DFT processing on the user data received by the two antennas to obtain the second CoMP data; the target RRU sends the obtained second CoMP data to the cooperative RRU; and performs DFT processing on the received user data in the target RRU.
  • the cooperative RRU performs DFT processing on the user data received by the preset number of antennas, and optionally, selects 6 days among the 8 antennas in the RRU.
  • the user data received by the line is subjected to DFT processing to obtain third CoMP data.
  • the cooperative RRU receives the second CoMP data sent by the target RRU, and performs interference suppression combining processing on the third CoMP data and the second CoMP data.
  • the target RRU performs IDFT, QAM, deinterleaving, HARQ merge Comb ine, and turbo decoding Turbo Decode to obtain the demodulation data of the user equipment.
  • the target RRU and the coordinated RRU are RRUs of different antenna numbers, for example, the target RRU is a 2-antenna RRU, and the cooperative RRU is an 8-antenna RRU, and the CoMP equalization process may also be performed by using the method described below.
  • the cooperative RRU sequentially performs DFT processing, interference suppression combining processing, and discrete Fourier transform IDFT on the user data received by the eight antennas to obtain fifth CoMP data, and obtains the fifth CoMP.
  • the data is sent to the target RRU; while the cooperative RRU processes the user data received by the eight antennas, the target RRU sequentially performs DFT processing, interference suppression combining processing, and IDFT on the user data received by the two antennas to obtain the sixth CoMP.
  • the target RRU receives the fifth CoMP data sent by the coordinated RRU, and performs maximum ratio combining (Maxim for Ra io Comb ining, MRC) processing; After the equalization process, the target RRU performs QAM, deinterleaving, HARQ combining, and turbo decoding Turbo Decode. Obtain demodulated data of the user equipment.
  • the method for co-cell coordinated multi-point transmission of the multi-radio remote unit is provided by the embodiment of the present invention, and the uplink demodulation performance of the user in the RRU overlap area is further improved, and the uplink demodulation performance of the user in the RRU overlap area is further improved and reduced.
  • User drop rate is provided by the embodiment of the present invention, and the uplink demodulation performance of the user in the RRU overlap area is further improved, and the uplink demodulation performance of the user in the RRU overlap area is further improved and reduced.
  • the embodiment of the present invention provides a device for multi-radio remote unit co-cell coordinated multi-point transmission, and the device may be a base station.
  • the device includes: a processor 801, a first determining module 8011, and a computing submodule. 80111, determining submodule 801 12, second determining module 8012, calculating submodule 80121, determining submodule 80122, target RRU 802, cooperative RRU 803;
  • the processor 801 is configured to determine a target RRU of the user equipment according to the at least two radio remote unit RRUs, and determine a cooperative RRU of the user equipment according to the target RRU and an RRU other than the target RRU;
  • the at least two radio remote unit RRUs belong to the multi-radio remote unit in the multi-radio remote unit in the embodiment, and belong to one base station.
  • the processor 801 is configured to: acquire an uplink signal to interference (SNR) uplink SINR of the at least two RRUs, and determine that the RRU corresponding to the largest uplink SINR of the uplink SINR is a target RRU of the user equipment.
  • SNR uplink signal to interference
  • the first determining module 8011 in the processor 801 is configured to determine a cooperative RRU of the user equipment according to an uplink RSRP measured by the target RRU and an uplink RSRP measured by an RRU other than the target RRU.
  • the second determining module 8012 in the processor 801 is configured to determine a cooperative RRU of the user equipment according to an uplink SINR measured by the target RRU and an uplink SINR measured by an RRU other than the target RRU.
  • the processor 801 includes at least one of the first determining module 8011 and the second determining module 8012.
  • the calculating submodule 80111 in the first determining module 8011 is configured to separately calculate an absolute value of a difference between an uplink RSRP measured by the target RRU and an uplink RSRP measured by each RRU except the target RRU. ;
  • the determining submodule 80112 in the first determining module 8011 is configured to determine a cooperative RRU of the user equipment according to an absolute value of the difference. Specifically, the determining submodule 80112 is configured to: when the absolute value of the at least two the difference values is less than or equal to a preset CoMP threshold, and the RRUs corresponding to the absolute values of the at least two of the difference values are RRUs of the same number of antennas Determining, by the RRU corresponding to the absolute value of the minimum difference among the absolute values of the at least two of the difference values, a cooperative RRU of the user equipment; and when the absolute value of the at least two of the difference values is less than or equal to the preset CoMP a threshold, and when the RRUs corresponding to the absolute values of the at least two differences are different RRUs, determining the RRU corresponding to the maximum uplink SINR according to the uplink SINR measured by the RRU corresponding to the absolute values of the at least two differences a cooperative RRU of the user equipment
  • the calculating submodule 80121 in the second determining module 8012 is configured to separately calculate a difference between an uplink S INR measured by the target RRU and an uplink S INR measured by an RRU other than the target RRU;
  • the determining submodule 80122 in the second determining module 8012 is configured to determine, according to the uplink S INR measured by the RRU corresponding to the difference, when the difference is less than or equal to the preset uplink S INR difference threshold,
  • the RRU corresponding to the uplink S INR is a cooperative RRU of the user equipment.
  • the target RRU 802 is configured to perform cooperative multi-point transmission CoMP equalization processing on the received user data in cooperation with the cooperative RRU 803.
  • the cooperative RRU 803 is configured to perform discrete Fourier transform DFT processing on the received user data, and obtain the first CoMP data. Sent to the target RRU 802;
  • the target RRU 802 is configured to perform DFT processing on the received user data, obtain second CoMP data, and perform interference suppression combining processing on the first CoMP data and the second CoMP data.
  • the cooperative RRU 803 is configured to perform DFT processing on user data received by a preset number of antennas, and obtain third CoMP data.
  • the target RRU 802 is configured to perform DFT processing on the received user data, obtain second CoMP data, and perform interference suppression combining processing on the third CoMP data and the second CoMP data.
  • the target RRU 802 is configured to perform DFT processing on the received user data, and send the obtained second CoMP data to the cooperative RRU 803.
  • the cooperative RRU 803 is configured to receive user data of a preset number of antennas. Performing DFT processing, obtaining third CoMP data, and performing interference suppression combining processing on the third CoMP data and the second CoMP data; or
  • the cooperative RRU 803 is configured to sequentially perform DFT processing, interference suppression combining processing, and discrete Fourier transform IDFT on the received user data, obtain fifth CoMP data, and send the fifth CoMP data to the
  • the target RRU 802 is configured to perform the DFT processing, the interference suppression combining processing, and the IDFT on the received user data, to obtain the sixth CoMP. Data; and performing maximum ratio combining processing on the fifth CoMP data and the sixth CoMP data. It should be noted that the target RRU 802 and the cooperative RRU 803 may exist independently as two devices, but the target RRU 802 and the cooperative RRU 803 belong to one base station.
  • An embodiment of the present invention provides a device for co-cell coordinated multi-point transmission of a multi-radio remote unit, where the processor is configured to determine a target RRU of the user equipment according to at least two radio remote units RRU of the same base station; a target RRU and an RRU other than the target RRU, determining a coordinated RRU of the user equipment; the target RRU, configured to perform cooperative multi-point transmission CoMP equalization processing on the received user data jointly with the cooperative RRU, It can improve the uplink demodulation performance and reduce the user drop rate.

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  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention porte sur un procédé et un dispositif de transmission multipoint coordonnée dans une cellule à multiples unités radio distantes. La présente invention concerne le domaine des technologies de réseau de communication, et peut améliorer les performances de démodulation de liaison montante et réduire un taux d'utilisateurs hors ligne. Selon des modes de réalisation de la présente invention, une RRU cible d'un équipement utilisateur est déterminée conformément à au moins deux unités radio distantes (RRU) d'une même station de base (101); une RRU coordonnée de l'équipement utilisateur est déterminée conformément à la RRU cible et à des RRU autres que la RRU cible (102); et la RRU cible et la RRU coordonnée effectuent un traitement d'égalisation de transmission multipoint coordonnée (CoMP) sur des données d'utilisateur reçues, afin d'obtenir des données de démodulation de l'équipement utilisateur (103). La solution décrite par les modes de réalisation de la présente invention est applicable pour une transmission multipoint coordonnée en liaison montante dans une cellule à multiples unités radio distantes.
PCT/CN2012/085610 2012-07-10 2012-11-30 Procédé et dispositif pour transmission multipoint coordonnée dans une cellule à multiples unités radio distantes WO2014008735A1 (fr)

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CN201210237441.4 2012-07-10

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