WO2014086045A1 - Procédé, dispositif et système de transmission coordonnée - Google Patents

Procédé, dispositif et système de transmission coordonnée Download PDF

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Publication number
WO2014086045A1
WO2014086045A1 PCT/CN2012/086210 CN2012086210W WO2014086045A1 WO 2014086045 A1 WO2014086045 A1 WO 2014086045A1 CN 2012086210 W CN2012086210 W CN 2012086210W WO 2014086045 A1 WO2014086045 A1 WO 2014086045A1
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WO
WIPO (PCT)
Prior art keywords
base station
weight
channel phase
phase difference
channel
Prior art date
Application number
PCT/CN2012/086210
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English (en)
Chinese (zh)
Inventor
李小捷
李琦
熊雄
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201280023244.0A priority Critical patent/CN103988446B/zh
Priority to PCT/CN2012/086210 priority patent/WO2014086045A1/fr
Publication of WO2014086045A1 publication Critical patent/WO2014086045A1/fr

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Classifications

    • 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
    • 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
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming

Definitions

  • the present invention relates to the field of communications, and in particular, to a method, apparatus, and system for cooperative transmission. Background technique
  • COMP Coordinated Multiple Points
  • the interference signal of the neighboring cell is transformed into a useful signal for the edge user of the cell by using the COP technology, and the edge user of the cell is served, thereby reducing the neighbor.
  • the interference of the cell to the users at the edge of the cell improves the SINR (Signal to Interference plus Noise Ratio) of the user and enhances the quality of the received signal of the user.
  • SINR Signal to Interference plus Noise Ratio
  • an estimation matrix indicating an uplink channel of the base station eNB1, an estimation matrix indicating an uplink channel of the base station eNB2, and a and b represent hf m h
  • the relative difference between the receiving and receiving channels of eNB1 and eNB2 is: ⁇ , ⁇ , indicating the jth transmitting channel response of the base station eNB1, indicating the jth receiving channel response of the base station eNB1, indicating the jth transmitting channel response of the base station eNB2, indicating the base station
  • the jth receiving channel response of eNB2, c indicates the UE
  • Embodiments of the present invention provide a method, apparatus, and system for cooperative transmission, which are used to improve the possibility of receiving a phase-consistent signal on the user side, and enhance the quality of the received information of the user.
  • embodiments of the present invention use the following technical solutions:
  • an embodiment of the present invention provides a method for cooperative transmission, including: acquiring, by a base station, a compensation parameter of a beamforming BF; the base station compensating for an original BF weight according to the compensation parameter of the BF, to obtain a first BF weight; the base station performs channel phase compensation on the first BF weight according to the channel phase difference and the first BF weight; the channel phase difference is used to perform the first BF weight The parameter of the channel phase compensation; the base station sends the data information to the user equipment UE according to the first BF weight value after the channel phase compensation.
  • the determining, by the base station, the compensation parameter of the beamforming BF comprises: acquiring, by the base station, an original BF weight and an estimation matrix of an uplink channel; The estimated matrix and the original BF weights are obtained for the BF compensation parameters.
  • the acquiring, by the base station, the compensation parameter of the beamforming BF comprises: receiving, by the base station, a compensation parameter of the BF sent by the processing device that is cooperatively transmitted.
  • the base station according to the channel phase difference Before performing channel phase compensation on the first BF weight, the method further includes: the base station acquiring a channel phase difference.
  • the acquiring, by the base station, the channel phase difference includes: if the base station is not the first reference base station, the base station acquires a channel phase difference between the base station and the first reference base station; wherein the first reference base station is a reference base station when the base station performs channel phase compensation.
  • the acquiring, by the base station, the channel phase difference includes: if the base station is the first reference base station, the base station acquires a channel phase difference between the base station and the first base station to be 0, where the base station A reference base station when channel phase compensation is performed for the first base station.
  • the embodiment of the present invention provides a method for cooperative transmission, including: determining a first reference base station and a first base station; determining a channel phase difference of the first reference base station and a channel phase difference of the first base station; Transmitting a channel phase difference of the first reference base station to the first base station; and transmitting a channel phase difference of the first base station to the first base station, so that the first base station and the base station
  • the first base station performs channel phase compensation on the first BF weight according to the channel phase difference; wherein, the first BF weight refers to the BF weight after the original BF weight is compensated according to the compensation parameter of the BF .
  • the determining a channel phase difference of the first reference base station and a channel phase difference of the first base station includes: determining the first reference base station A channel phase difference between a reference base station and the first base station is 0; and determining, according to a preset algorithm, a phase difference of at least one preset channel between the first reference base station and the first base station of the first base station.
  • the sending, by the first base station, the channel phase difference to the first base station includes: performing the according to a preset algorithm Determining, by the determined first at least one preset channel between the first base station and the first base station, the phase difference is sent to the first base station.
  • the method further includes: determining, by the second reference base station, And acquiring, by the second base station, an estimation matrix and an original BF weight of the uplink channel of the second base station and the second base station; acquiring, according to an estimation matrix of the uplink channel of the second base station and the second base station, and an original BF weight a compensation parameter of a beam assignment BF of the second base station and the second base station; transmitting the acquired compensation parameter of the BF of the second base station to the second reference base station; and the second The compensation parameter of the BF of the base station is sent to the second base station, so that the second reference base station and the second base station compensate the original BF weight according to the compensation parameter of the BF, to obtain the first BF right. value.
  • the compensation parameter includes: 0 as the compensation parameter of the BF of the second reference base station; and according to the formula: fi k - angle ((H U k L ) T w k Y ((H ⁇ L f
  • an embodiment of the present invention provides a base station, including: an acquiring unit, configured to acquire a compensation parameter of a beamforming BF; a compensation unit, configured to acquire, according to the compensation parameter of the BF obtained by the acquiring unit, an original The BF weight is compensated to obtain a first BF weight; the compensation unit is further configured to perform channel phase compensation on the first BF weight according to the channel phase difference and the first BF weight; the channel The phase difference is a parameter for performing channel phase compensation on the first BF weight; the sending unit is configured to send data information to the user equipment UE according to the weight of the first BF after the channel phase compensation obtained by the compensation unit.
  • the acquiring unit is specifically configured to: obtain an original BF weight and an estimation matrix of an uplink channel; and according to the estimation matrix of the uplink channel and the original BF weight , Get the compensation parameters of BF.
  • the acquiring unit is specifically configured to: receive a compensation parameter of the BF sent by the processing device that is cooperatively transmitted.
  • the acquiring unit is further used Obtain the channel phase difference.
  • the acquiring unit is specifically configured to acquire, when the base station is not the first reference base station, the first reference The channel phase difference between the base stations; wherein the first reference base station is a reference base station when the base station performs channel phase compensation.
  • the acquiring unit is specifically configured to: when the base station is a first reference base station, acquire the base station and The channel phase difference between the first base stations is 0, where the base station is a reference base station when the first base station performs channel phase compensation.
  • the embodiment of the present invention provides a processing device for cooperative transmission, including: a determining unit, configured to determine a first reference base station and a first base station; and the determining unit is further configured to determine the first reference base station a channel phase difference and a channel phase difference of the first base station; a transmitting unit, configured to send, by the determining unit, a channel phase difference of the first reference base station to the first reference base station; The channel phase difference of the first base station is sent to the first base station, so that the first reference base station and the first base station perform channel phase compensation on the first BF weight according to the channel phase difference;
  • the first BF weight refers to the BF weight after the original BF weight is compensated according to the compensation parameter of BF.
  • the determining unit is specifically configured to: determine that a channel phase difference between the first reference base station and the first base station of the first reference base station is 0; Determining, by the preset algorithm, a phase difference of at least one preset channel between the first reference base station and the first base station of the first base station.
  • the sending unit is specifically configured to: use the first base station that is determined according to a preset algorithm
  • the at least one preset channel between the reference base station and the first base station is out of phase, and the periodic polling is sent to the first base station.
  • the determining unit is further configured to determine a second base station, and a second base station; the processing device, further comprising: an acquiring unit, configured to acquire an estimation matrix and an original BF weight of an uplink channel of the second reference base station and the second base station; And acquiring, by the estimation matrix of the uplink channel of the second base station and the second base station, and the original BF weight, acquiring compensation parameters of the beam assignment BF of the second reference base station and the second base station; a unit, configured to send, to the second reference base station, a compensation parameter of the BF of the second reference base station acquired by the acquiring unit, and send a compensation parameter of the BF of the second base station to the second And the base station, so that the second reference base station and the second base station compensate the original BF weight according to the compensation parameter of the BF, to obtain the first BF weight.
  • the acquiring unit is specifically configured to use 0 as the fi k - angle of the second reference base station ( (H U k L ) T w k Y ((H ⁇ L f
  • an embodiment of the present invention provides a system for cooperative transmission, including: at least two base stations, a user equipment UE, and a processing device for cooperative transmission; wherein the base station provides a collaboration for the foregoing embodiment of the present invention.
  • the method, device and system for transmitting by obtaining the compensation parameter of BF, compensate the original BF weight to obtain the first BF weight.
  • Channel phase compensation is performed on the first BF weight according to the channel phase difference and the first BF weight, and the data information is transmitted to the UE by using the first BF weight of the channel phase compensation.
  • the BF weight is compensated, thereby reducing the possibility that the signal phases of the at least two base stations that simultaneously transmit the data information to the UE are inconsistent, and at least simultaneously transmitting the data information to the UE is improved.
  • the effect of the signal superposition of the two base stations thereby realizing the possibility of improving the phase-consistent signal received on the user side, and enhancing the quality of the received information of the user.
  • FIG. 1 is a schematic diagram of a method for cooperative transmission according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of another method for cooperative transmission according to an embodiment of the present invention
  • FIG. 3 is another collaboration provided by an embodiment of the present invention.
  • FIG. 4 is a schematic functional block diagram of a base station according to an embodiment of the present invention.
  • FIG. 5 is a functional block diagram of another base station according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of a base station according to an embodiment of the present invention
  • FIG. 7 is a functional block diagram of a processing device for cooperative transmission according to an embodiment of the present invention. Intention
  • FIG. 8 is a schematic functional block diagram of another processing device for cooperative transmission according to an embodiment of the present disclosure.
  • FIG. 9 is a functional block diagram of another processing device for cooperative transmission according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a processing device for cooperative transmission according to an embodiment of the present invention
  • FIG. 11 is a schematic diagram of a system for cooperative transmission according to an embodiment of the present invention.
  • An embodiment of the present invention provides a method for cooperative transmission, as shown in FIG. 1 , including:
  • the base station acquires a compensation parameter of BF (beam forming).
  • the base station obtains the compensation parameter of the BF in two ways. One is that the base station obtains the compensation parameter of the BF by itself, and the other is that the base station acquires the compensation parameter of the BF through the cooperatively transmitted processing device.
  • the specific process of the base station acquiring the compensation parameter of the BF is: the base station acquires the original BF weight and the estimation matrix of the uplink channel. The base station acquires a compensation parameter of the BF according to the estimation matrix of the uplink channel and the original BF weight.
  • the original BF weight is the BF weight without any compensation.
  • the base station may obtain an estimation matrix of the uplink channel by using channel estimation.
  • the base station can obtain the original BF value through the estimation matrix of the uplink signal.
  • the following is an example of obtaining the original BF value based on the estimation matrix of the uplink signal in the TDD (Time Division Duplexing) system.
  • the specific process is as follows: In the TDD (Time Division Duplexing) system, due to the uplink and downlink The link uses the same frequency, so the eNB (Evolved NodeB, Enhanced Base Station) and UE (User Equipment, User Equipment)
  • the spatial channels between the antennas can be considered to be the same.
  • the spatial channel is represented by a matrix.
  • the RRU (Remote Radio Unit) of the eNB has m transceiver units, wherein the i-th transmission channel response is / ⁇ , and the i-th reception channel response is '.
  • the UE has "TRX, where the first channel response is
  • the response of the first receiving channel is ".
  • the estimation matrix for the uplink channel used by the eNB to receive information transmitted by the UE is:
  • the UE is a diagonal matrix formed by the receiving channel response of the eNB, and is a diagonal matrix formed by the UE's transmitting channel response.
  • the estimation matrix for the downlink channel used by the UE to receive the information transmitted by the eNB is:
  • the same amplitude phase difference that is to say, .
  • m the unit matrix of size
  • a is a fixed value.
  • the eNB side can obtain the downlink channel through the uplink channel, and the specific process is as follows:
  • the base station can directly calculate the original BF weight according to the base. It should be noted that the base station also uses other methods to obtain the original BF weight. For example, the BF weight is obtained according to the covariance of the uplink channel at the previous moment and the estimation matrix of the uplink channel at the current moment. The present invention does not limit this. After the base station obtains the original BF weight, it is estimated according to the uplink channel. The matrix and the original BF weight obtain the compensation parameter of the BF.
  • X in the Xth column element of the matrix may be an antenna fixed to the UE, or may be an antenna of all antennas of the polled UE, or may be obtained according to x, where Take the sum of the squares of all the elements of H: It is also possible to obtain X according to other methods, and the present invention does not limit this.
  • V ⁇ represents the weight of the first BF of the base station k
  • ⁇ represents the weight of the original BF of the base station k
  • k represents the first base station
  • k 1, 2, ..., K
  • K represents the The number of base stations in which the UE transmits data information
  • e represents the BF phase compensation parameter of the base station k
  • j represents an imaginary unit
  • A represents a compensation parameter of the BF.
  • the base station performs channel phase compensation on the first BF weight according to the channel phase difference and the first BF weight.
  • the channel phase difference is a parameter for performing channel phase compensation on the first BF weight.
  • k is the first base station
  • k l, 2, ..., ⁇
  • K represents the number of base stations transmitting data information to the UE; and indicates that the base station k performs channel phase compensation first.
  • BF weight; ⁇ denotes the first BF weight of the base station k; e 1 ⁇ 2 denotes the channel phase compensation parameter of the base station k, j denotes an imaginary unit, ⁇ denotes the channel phase difference of the base station k, the ⁇ is pre-acquired, and ⁇ e [0, 2 r].
  • the subsequent first BF weight is: That is, for the first reference base station, the first BF weight does not require channel phase compensation.
  • the base station sends data information to the user equipment UE according to the first BF weight value after the channel phase compensation.
  • the base station performs data on the data by using the weight of the first BF after channel phase compensation. Weighted and sent to the UE.
  • k represents the first few base stations
  • k l, 2, ..., K.
  • ⁇ indicates the number of base stations that transmit data information to the UE.
  • gl represents a first reference base station
  • the base station T k represents transmitted data weighting
  • s k indicates the base station needs to send data to the UE
  • BF denotes a first weight value of a first reference base station, a representation of the channel phase compensation for base station k After the weight of the first BF.
  • the weighting data is transmitted to the UE according to the formula;
  • An embodiment of the present invention provides a method for cooperative transmission. By acquiring a compensation parameter of BF, the original BF weight is compensated to obtain a first BF weight. Channel phase compensation is performed on the first BF weight according to the channel phase difference and the first BF weight, and the data information is transmitted to the UE by using the first BF weight of the channel phase compensation.
  • An embodiment of the present invention provides a method for cooperative transmission, as shown in FIG. 2, including:
  • the processing device of the coordinated transmission determines one first reference base station among the at least two base stations that need to perform channel phase compensation, and determines other base stations as the first base station. It should be noted that the processing device of the coordinated transmission may determine a first reference base station in at least two base stations that need to perform channel phase compensation according to a preset algorithm, and may select any one of at least two base stations that need channel phase compensation. A base station determines that it is the first base station, and the present invention does not limit this.
  • the processing device of the coordinated transmission determines that the channel phase difference between the first reference base station and the first base station of the first reference base station is 0.
  • the processing device of the coordinated transmission determines, according to a preset algorithm, at least between the first reference base station of the first base station and the first base station A preset channel phase difference.
  • At least two base stations that perform channel phase compensation on the BF weight are neighboring base stations.
  • the channel between the first base station of the first base station and the first reference base station needs to be determined on the basis of the channel phase difference of the first reference base station.
  • Phase difference For example, the existing three base stations eNB1, eNB2, and eNB3 are adjacent to the base station eNB2, and the base station eNB2 is adjacent to the base station eNB3.
  • the processing device that performs the coordinated transmission uses the base station eNB1 as the first reference base station and the base station eNB2 as the first base station.
  • the cooperative transmitting processing device uses the base station eNB2 as the first reference base station and the base station eNB3 as the first base station. Since it has been determined that the channel phase difference of the base station eNB2 is ⁇ ⁇ that is, the channel phase of the base station 2 has been adjusted by ⁇ ⁇ , the base station eNB3 needs to determine the base station eNB3 based on the channel phase difference of the base station eNB2.
  • the determined channel phase difference of the base station eNB3 is a i+ a ⁇ where a 2 is the channel phase difference of the determined base station eNB3 when the value of the channel phase difference of the base station eNB2 is 0. value.
  • the first BF weight refers to the BF weight after the original BF weight is compensated according to the compensation parameter of the BF.
  • the original BF weight is a BF weight that is not compensated.
  • the processing device of the coordinated transmission transmits the channel phase difference of the first reference base station to the first reference base station. That is, the channel phase difference of the first reference base station having a value of 0 is transmitted to the first reference base station such that the first reference performs channel phase compensation on the first BF weight according to the channel phase difference of 0.
  • the processing device of the coordinated transmission sends a phase difference between the first reference base station of the first base station and the first base station determined by the preset algorithm, and the periodic polling is sent to the The first base station is described.
  • the processing device that the coordinated transmission determines the channel phase difference between the first base station of the first base station and the first reference base station, sends the channel phase difference to the first base station, so that the first base station according to the channel phase difference pair A BF weight is used for channel phase compensation. If the processing device that the coordinated transmission determines the channel phase difference between the first base station of the first base station and the first reference base station, the channel phase between the first base station of the plurality of first base stations and the first reference base station may be used. Poor, periodic polling is sent to the first base station. Further, the processing device of the cooperative transmission transmits the channel phase difference to the first base station according to the period T.
  • the example provides a method for cooperative transmission, after the processing device of the cooperative transmission determines the channel phase difference of the first base station acquired by the first base station and the first base station, and the channel phase difference of the first reference base station is sent to the first a base station and the first reference base station, so that after receiving the corresponding channel phase difference, the base station side can perform channel phase compensation on the first BF weight according to the channel phase difference and the first BF weight, and perform channel phase compensation by using The first BF weight sends the data information to the UE. In this way, before the base station side transmits the data, the BF weight can be compensated, thereby reducing the possibility that the signal phases of at least two base stations that simultaneously send the data information to the UE are inconsistent.
  • the embodiment of the present invention provides a method for cooperative transmission. As shown in FIG. 3, the method includes: Steps: Steps 304b, 305-315 are performed if the base station acquires the compensation parameter of the BF by the base station itself. If the base station acquires the compensation parameter of BF, it is transmitted through cooperation. If the device is acquired, steps 301-303, 304a, 305-315 are performed.
  • a processing device that cooperates to transmit determines a second reference base station, and a second base station. Specifically, the processing device of the coordinated transmission determines one of the at least two base stations that transmit data information to one UE, and determines the other base stations as the first base station.
  • the processing device of the coordinated transmission may determine a first reference base station in at least two base stations that send data information to one UE according to a preset algorithm, and may be in at least two base stations that send data information to one UE.
  • the eNB is arbitrarily selected to determine that it is the first base station, and the present invention does not limit this.
  • the processing device of the coordinated transmission acquires an estimation matrix and an original BF weight of the uplink channel of the second reference base station and the second base station.
  • the process of acquiring, by the cooperative processing device, the estimation matrix of the uplink channel of the second base station and the second base station and the original BF weight is the same as the process of acquiring the estimation matrix of the uplink channel and the original BF weight, and may refer to Step 101, and details are not described herein again.
  • the optional cooperative transmitting processing device only obtains the estimation matrix of the uplink channel of the second base station and the original BF weight, and does not acquire the estimation matrix of the uplink channel of the second reference base station and the original BF weight.
  • the processing device of the coordinated transmission acquires the compensation of the beam assignment BF of the second reference base station and the second base station according to the estimation matrix of the uplink channel of the second base station and the second base station, and the original BF weight. parameter.
  • the processing device for cooperative transmission is according to the formula: fi k - angle ((H U k L ) T w k Y ((H ⁇ L f
  • angle represents the phase
  • g represents the second reference base station
  • ⁇ represents the original BF weight of the second base station g
  • H ⁇ represents the estimation matrix of the uplink channel of the second base station k
  • H represents the second reference base station g
  • T represents the transpose of the matrix
  • ⁇ represents the conjugate transpose of the matrix.
  • the estimation matrix of the downlink channel of the first base station to the UE is ⁇
  • the estimation matrix of the downlink channel of the second base station to the UE is
  • the first base station calculates the BF right of a certain data stream to be sent according to the estimation matrix of the uplink channel.
  • the value is ⁇
  • the second base station obtains the BF weight of the data stream to be sent according to the calculation.
  • the estimation matrix of the downlink channels of the two base stations to the UE is:
  • H D x L ac ⁇ H U x L ) T
  • H D 2 L bc(H U 2 L ) T ; where a and b represent the first base station and the second base station, respectively
  • the relative difference between the transceiver channels is: , c indicates that the UE's transceiver channel is relatively hi
  • the receiving power of the UE is:
  • H eff (H , + H D 2 L w 2 ) H (H , + e ie H DL w 2 )
  • ffmW2 max ⁇ 2 ⁇ 4 ⁇ Larger , you need e , HdlWi) ffmW2 is a real number, that is, the imaginary part is 0, so
  • the processing device of the coordinated transmission transmits the obtained compensation parameter of the BF of the second reference base station to the second reference base station, and sends the compensation parameter of the BF of the second base station to the second base station,
  • the second reference base station and the second base station are compensated according to the compensation parameter of the BF to obtain the first BF weight.
  • the base station receives the compensation parameter of the BF transmitted by the processing device that is cooperatively transmitted.
  • the base station obtains the compensation parameter of the beamforming BF.
  • the base station obtains the compensation parameter of the BF by itself, and may refer to step 101, and details are not described herein again.
  • step 102 The same as step 102, and details are not described herein again.
  • first reference base station and the second reference base station determined by the processing device of the coordinated transmission may be the same base station or different base stations, which is not limited by the present invention.
  • step 202 The same as step 202, and details are not described herein again.
  • the processing device of the coordinated transmission sends the channel phase difference of the first reference base station to the first reference base station, and sends a channel phase difference of the first base station to the first base station, where the base station acquires a channel phase. difference.
  • the processing device that the coordinated transmission sends the channel phase difference of the first reference base station to the first reference base station, and sends the channel phase difference of the first base station to the first base station, and Step 203 is the same and will not be described again here.
  • the base station acquires the pass phase difference by receiving the channel phase difference transmitted by the processing device of the cooperative transmission.
  • the base station acquires a channel phase difference between the base station and the first reference base station.
  • the first reference base station is a reference base station when the first base station performs channel phase compensation. At this time, the base station is the first base station. If the base station is the first reference base station, the base station acquires a channel phase difference between the base station and the first base station to be 0.
  • the base station is a reference base station when performing channel phase compensation on the first base station. It should be noted that, the present invention does not limit the order between the steps 301-305 and the steps 306-308, and may perform steps 301-305 before performing steps 306-308, or may perform steps 306-308 first. Steps 301 - 305, only one of which is shown in the drawing. 309. The same as step 103, and details are not described herein again.
  • step 104 the same as step 104, and details are not described herein again.
  • step 311-315 is performed; if the base station is not the serving base station of the UE, step 315 is performed.
  • the base station is a serving base station of the UE, receive the received quality information fed back by the UE.
  • the base station transmits the data information by using the first BF weight that performs channel phase compensation, and the UE sends its own receiving quality information. Feedback to the serving base station.
  • the receiving quality information fed back by the UE includes: ACK (Acknowledgement) information, CQI (channel quality indication, channel quality indication). It should be noted that the received quality information fed back by the UE may further include other information, which is not limited by the present invention.
  • the base station sends the received quality information that is sent by the UE to the processing device of the coordinated transmission, so that the coordinated transmitting processing device determines the service of the UE according to the received quality information fed back by the UE.
  • the processing device of the coordinated transmission receives the reception quality information fed back by the UE sent by the serving base station of the UE.
  • the cooperative base station of the UE is a base station that sends data information to the UE and is not a serving base station of the UE.
  • the processing device of the coordinated transmission calculates the performance parameter of the UE according to the received quality information fed back by the UE. Specifically, the processing device of the coordinated transmission according to the received quality information fed back by the UE sent by the serving base station of the UE, and the performance parameter of the UE at the current moment.
  • the performance parameters of the UE include: spectrum efficiency and throughput of the UE.
  • the processing device of the coordinated transmission determines the optimal performance parameter of the UE according to the statistical performance parameter of the UE, and determines the serving base station and the UE of the UE corresponding to the performance parameter of the optimal UE.
  • the cooperative base station of the UE is a base station that sends data information to the UE and is not a serving base station of the UE.
  • the processing device of the coordinated transmission determines, in step 307, that the first base station has at least one channel phase difference, and the processing device that the cooperative transmission transmits, when transmitting the channel phase difference to the first base station, is sent according to the serving base station of the UE.
  • the received quality information fed back by the UE counts the performance parameters of the UE in the case of transmitting a channel phase difference to the first base station.
  • the processing device of the coordinated transmission determines that the phase difference of each channel of the first base station corresponds to the performance parameter of the UE, and determines the optimal UE according to the performance parameter of the channel corresponding to the phase difference of each channel of the first base station.
  • the performance parameter is determined, and the channel phase difference of the first base station corresponding to the optimal UE performance parameter is determined, and the channel phase difference is sent to the first base station. That is to say, after determining the optimal UE performance parameter, the channel phase difference of the server of the UE corresponding to the optimal UE performance parameter and the channel phase difference of the cooperative base station are determined.
  • the step 307 may be: when determining the channel phase difference of the first base station, the channel phase difference of the first base station corresponding to the last determined optimal UE performance parameter may be determined. At least one channel of the first base station is out of phase.
  • the processing device of the coordinated transmission determines the phase difference of at least one channel of the first base station of the current time.
  • At least one channel phase difference of the first base station of the current time may be determined according to a preset algorithm and based on the ⁇ 3, that is, the determined at least one channel phase difference of the first base station of the current time includes a value.
  • the processing device of the coordinated transmission sends the determined channel phase difference of the serving base station of the UE and the coordinated base station of the UE corresponding to the determined performance parameter of the optimal UE to the serving base station of the UE and the UE, respectively.
  • Cooperative base station receives the channel phase difference transmitted by the processing device that is cooperatively transmitted.
  • the processing device that is cooperatively transmitted determines the channel phase difference of the UE serving base station corresponding to the optimal UE performance parameter according to the optimal UE performance parameter, and the channel phase difference of the cooperative base station, and the determined
  • the channel phase difference of the UE serving base station corresponding to the performance parameter of the optimal UE is sent to the serving base station of the UE, and the channel phase difference of the coordinated base station corresponding to the determined optimal UE performance parameter is sent to the cooperative base station of the UE. That is, the channel phase difference of the first base station corresponding to the determined optimal UE performance parameter is sent to the first base. Station.
  • the embodiment of the invention provides a method for cooperative transmission.
  • the base station compensates the original BF weight by obtaining the compensation parameter of the BF, and obtains the first BF weight.
  • the processing device of the coordinated transmission determines the channel phase difference of the acquired first base station and the channel phase difference of the first reference base station to the first base station and the first reference base station after determining the first base station and the first reference base station. After acquiring the channel phase difference, the base station performs channel phase compensation on the first BF weight according to the channel phase difference and the first BF weight, and transmits data information to the UE by using the first BF weight of the channel phase compensation.
  • the BF weight is compensated, thereby reducing the possibility that the signal phases of at least two base stations that simultaneously transmit data information to the UE are inconsistent, and at least simultaneously transmitting data information to the UE is improved.
  • the effect of the signal superposition of the two base stations thereby realizing the possibility of improving the phase-consistent signal received on the user side, and enhancing the quality of the received information of the user.
  • FIG. 4 is a functional block diagram of a base station according to an embodiment of the present invention.
  • the base station includes: an obtaining unit 401, a compensation unit 402, and a sending unit 403.
  • the obtaining unit 401 is configured to obtain a compensation parameter of the beamforming BF.
  • the acquiring unit 401 is specifically configured to obtain an original BF weight and an estimation matrix of the uplink channel, and obtain a compensation parameter of the BF according to the estimation matrix of the uplink channel and the original BF weight.
  • T represents the transpose of the matrix
  • H ⁇ represents the matrix of the uplink channel of the base station k
  • ( : , x ) represents the Xth column element of the matrix
  • k represents the first base station
  • k l, 2, . . . . , K
  • K represents the number of base stations transmitting data information to the UE
  • A represents
  • the obtaining unit 401 is specifically configured to receive a compensation parameter of the BF sent by the processing device that is cooperatively transmitted.
  • ⁇ denotes the weight of the first BF of the base station k
  • ⁇ denotes the weight of the original BF of the base station k
  • the number of base stations that the UE transmits data information indicates the BF phase compensation parameter of the base station k, j represents the imaginary unit, and A represents the compensation parameter of the BF.
  • the compensation unit 402 is further configured to perform channel phase compensation on the first BF weight according to the channel phase difference and the first BF weight.
  • the channel phase difference is a parameter for performing channel phase compensation on the first BF weight.
  • the sending unit 403 is configured to send data information to the user equipment UE according to the weight of the first BF after the channel phase compensation obtained by the compensation unit 402.
  • the obtaining unit 401 is further configured to acquire a channel phase difference.
  • the acquiring unit 401 is specifically configured to acquire a channel phase difference with the first reference base station if the base station is not the first reference base station.
  • the first reference base station is a reference base station when the base station performs channel phase compensation.
  • the acquiring unit 401 is specifically configured to: when the base station is the first reference base station, acquire a channel phase difference between the base station and the first base station to be 0.
  • the base station is a reference base station when performing channel phase compensation on the first base station.
  • the foregoing base station as shown in FIG. 5, further includes:
  • the receiving unit 404 is configured to receive, according to the serving base station of the UE, the receiving quality information fed back by the UE.
  • the sending unit 403 is further configured to: feed back the UE received by the receiving unit 404.
  • the received quality information is sent to the processing device of the coordinated transmission, so that the processing device that the coordinated transmission determines, according to the received quality information fed back by the UE, the serving base station of the UE and the coordinated base station of the UE. Channel phase difference.
  • the cooperative base station of the UE is a base station that sends data information to the UE and is not a serving base station of the UE.
  • the foregoing sending unit may be a transmitter or a transceiver
  • the above receiving unit may be a receiver or a transceiver
  • the sending unit and the receiving unit may be integrated to form a transceiver unit, corresponding to hardware.
  • the above obtaining unit and the compensating unit may be embedded in the hardware of the base station in hardware or may be stored in the memory of the base station in software, so that the processor calls to perform the operations corresponding to the above modules.
  • the processor can be a central processing unit (CPU), a microprocessor, a microcontroller, or the like.
  • the embodiment of the invention provides a base station, which compensates the original BF weight by obtaining the compensation parameter of the BF, and obtains the first BF weight.
  • Channel phase compensation is performed on the first BF weight according to the channel phase difference and the first BF weight, and the data information is transmitted to the UE by using the first BF weight of the channel phase compensation.
  • the BF weight is compensated, thereby reducing the possibility that the signal phases of at least two base stations that simultaneously transmit data information to the UE are inconsistent, and at least simultaneously transmitting data information to the UE is improved.
  • the effect of the signal superposition of the two base stations thereby realizing the possibility of improving the phase-consistent signal received on the user side, and enhancing the quality of the received information of the user.
  • FIG. 6 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • the base station includes: a transmitter 601, a receiver 602, a memory 603, and a processor 604 connected to the transmitter 601, the receiver 602, and the memory 603, respectively.
  • the base station may also include a common component such as an antenna, a baseband processing component, a medium-frequency processing component, and an input/output device, and the embodiment of the present invention is not limited thereto.
  • the memory 603 stores a set of program codes
  • the processor 604 is configured to call the program code in the memory 603 to perform the following operations: Acquire the compensation parameters of the beamforming BF.
  • the compensation parameter of the BF transmitted by the processing device of the cooperative transmission may be received by the receiver 602.
  • the original BF weight is compensated according to the obtained compensation parameter of the BF, and the first BF weight is obtained.
  • ⁇ denotes the weight of the first BF of the base station k
  • ⁇ denotes the weight of the original BF of the base station k
  • K denotes the The number of base stations that the UE transmits data information
  • j represents the imaginary unit
  • A represents the compensation parameter of the BF.
  • Channel phase compensation is performed on the first BF weight according to the channel phase difference and the first BF weight.
  • the channel phase difference is a parameter for performing channel phase compensation on the first BF weight.
  • channel phase compensation is performed on the first BF weight.
  • k denotes the first base station
  • k l, 2,
  • ⁇ , K denotes the number of base stations transmitting data information to the UE
  • the first BF weight indicating that the base station k performs channel phase compensation
  • the first BF weight of k e 1 ⁇ 2 represents the channel phase compensation parameter of base station k
  • j represents the imaginary unit
  • ⁇ represents the channel phase difference of base station k
  • the ⁇ is pre-acquired, and ⁇ e[0, 2r].
  • the transmitter 601 is configured to send data information to the user equipment UE according to the obtained weight of the first BF after the channel phase compensation.
  • the channel phase difference with the first reference base station is acquired.
  • the first reference base station is a reference base station when the base station performs channel phase compensation.
  • the channel phase difference between the base station and the first base station is obtained as 0.
  • the base station is a reference base station when performing channel phase compensation on the first base station.
  • the receiver 602 is configured to receive, according to the serving base station of the UE, the receiving quality information fed back by the UE.
  • the transmitter 601 is further configured to send, by the receiving unit 404, the received quality information fed back by the UE to the processing device of the cooperative transmission, so that the processing device that is jointly transmitted according to the received quality of the UE is received. And determining a channel phase difference corresponding to the serving base station of the UE and the coordinated base station of the UE.
  • the cooperative base station of the UE is a base station that sends data information to the UE and is not a serving base station of the UE.
  • the embodiment of the invention provides a base station, which compensates the original BF weight by obtaining the compensation parameter of the BF, and obtains the first BF weight.
  • Channel phase compensation is performed on the first BF weight according to the channel phase difference and the first BF weight, and the data information is transmitted to the UE by using the first BF weight of the channel phase compensation.
  • the BF weight is compensated, thereby reducing the possibility that the signal phases of at least two base stations that simultaneously transmit data information to the UE are inconsistent, and at least simultaneously transmitting data information to the UE is improved.
  • the effect of the signal superposition of the two base stations thereby realizing the possibility of improving the phase-consistent signal received on the user side, and enhancing the quality of the received information of the user.
  • FIG. 7 is a functional block diagram of a processing device for cooperative transmission according to an embodiment of the present invention.
  • the processing device of the cooperative transmission includes: a determining unit 701 and a sending unit 702.
  • the determining unit 701 is configured to determine the first reference base station and the first base station.
  • the determining unit 701 is further configured to determine a channel phase difference of the first reference base station and a channel phase difference of the first base station.
  • the determining unit 701 is specifically configured to determine that a channel phase difference between the first reference base station and the first base station of the first reference base station is 0.
  • the first base station of the first base station and the first base At least one preset channel phase difference between stations.
  • the sending unit 702 is configured to send, by the determining unit 701, a channel phase difference of the first reference base station to the first reference base station, and send a channel phase difference of the first base station to the first And the base station, so that the first reference base station and the first base station perform channel phase compensation on the first BF weight according to the channel phase difference.
  • the first BF weight refers to the BF weight after the original BF weight is compensated according to the compensation parameter of BF.
  • the sending unit 702 is specifically configured to: at least one preset channel phase between the first base station and the first base station of the first base station determined by the determining unit 701 according to a preset algorithm. Poor, periodic polling is sent to the first base station.
  • the determining unit 701 is further configured to determine the second reference base station and the second base station.
  • the processing device of the cooperative transmission further includes:
  • the obtaining unit 703 is configured to obtain an estimated matrix and an original BF weight of the uplink channel of the second base station and the second base station.
  • the acquiring unit 703 is further configured to acquire, according to the estimation matrix of the uplink channel of the second base station and the second base station, and the original BF weight, the beam assignment BF of the second reference base station and the second base station. Compensation parameters.
  • angle represents the phase
  • g represents the second reference base station
  • ⁇ represents the original BF weight of the second base station g
  • H ⁇ represents the estimation matrix of the uplink channel of the second base station k
  • H represents the second reference base station g
  • T represents the transpose of the matrix
  • ⁇ represents the conjugate transpose of the matrix.
  • the sending unit 702 is further configured to send, to the second reference base station, a compensation parameter of the BF of the second reference base station acquired by the acquiring unit 703, and the second base station
  • the compensation parameter of the BF is sent to the second base station, so that the second reference base station and the second base station compensate the original BF weight according to the compensation parameter of the BF, to obtain the first BF weight.
  • the processing device of the cooperative transmission as shown in FIG. 9, further includes:
  • the receiving unit 704 is configured to receive, by the serving base station of the UE, the received quality information that is sent by the UE.
  • the statistic unit 705 is configured to collect, according to the received quality information fed back by the UE received by the receiving unit 704, the performance parameter of the UE.
  • the determining unit 701 is specifically configured to determine an optimal UE performance parameter according to the performance parameter of the UE that is calculated by the statistics unit 705, and determine the UE corresponding to the optimal UE performance parameter.
  • the cooperative base station of the UE is a base station that sends data information to the UE and is not a serving base station of the UE.
  • the sending unit 702 is specifically configured to send, by the determining unit 701, the channel phase difference corresponding to the serving base station of the UE and the coordinated base station of the UE to the serving base station of the UE and the UE, respectively. Cooperative base station.
  • the sending unit 702 is configured to send a channel phase difference of the UE serving base station corresponding to the determined optimal UE performance parameter to the serving base station of the UE, and perform collaboration of the determined optimal UE performance parameter.
  • the channel phase difference of the base station is transmitted to the cooperative base station of the UE. That is, the channel phase difference of the first base station corresponding to the determined optimal UE performance parameter is transmitted to the first base station.
  • the foregoing sending unit may be a transmitter or a transceiver
  • the above receiving unit may be a receiver or a transceiver
  • the sending unit and the receiving unit may be integrated to form a transceiver unit, corresponding to hardware.
  • the above obtaining unit, determining unit and counting unit may be embedded in the hardware of the base station in hardware or may be stored in the memory of the base station in software, so that the processor calls to perform the operations corresponding to the above modules.
  • the processor can be a central processing unit (CPU), a microprocessor, a microcontroller, or the like.
  • An embodiment of the present invention provides a processing device for cooperative transmission, where a processing device that cooperatively transmits determines a channel phase difference of a first base station that is to be obtained after the first base station and the first base station, and a channel phase of the first reference base station. The difference is sent to the first base station and the first reference base station, so that after receiving the corresponding channel phase difference, the base station side can perform channel phase compensation on the first BF weight according to the channel phase difference and the first BF weight, and use The first BF weight of the channel phase compensation transmits data information to the UE.
  • FIG. 10 is a schematic structural diagram of a processing device for cooperative transmission according to an embodiment of the present invention.
  • the processing device of the cooperative transmission includes a transmitter 1001, a receiver 1002, a memory 1003, and a processor 1004 connected to the transmitter 1001, the receiver 1002, and the memory 1003, respectively.
  • the base station may also include a common component such as an antenna, a baseband processing component, a medium-frequency processing component, and an input/output device, and the embodiment of the present invention is not limited thereto.
  • the memory 1003 stores a set of program codes
  • the processor 1004 is configured to call the program code in the memory 1003 to perform the following operations: determining the first reference base station and the first base station. Determining a channel phase difference of the first reference base station and a channel phase difference of the first base station.
  • determining a channel phase difference between the first reference base station and the first base station of the first reference base station is 0. Determining, by the preset algorithm, a phase difference of at least one preset channel between the first reference base station and the first base station of the first base station.
  • the transmitter 1001 is configured to send the determined channel phase difference of the first reference base station to the first reference base station, and send a channel phase difference of the first base station to the first base station, so that The first reference base station and the first base station perform channel phase compensation on the first BF weight according to the channel phase difference.
  • the first BF weight refers to the BF weight after the original BF weight is compensated according to the compensation parameter of the BF.
  • the transmitter 1001 is specifically configured to perform a phase difference between the first reference base station of the first base station determined by the preset algorithm and at least one preset channel between the first base stations, and periodically polled. Send to the first base station.
  • the transmitter 1001 is further configured to send the acquired compensation parameter of the BF of the second reference base station to the second reference And transmitting, by the base station, the compensation parameter of the BF of the second base station to the second base station, so that the second reference base station and the second base station compensate the original BF weight according to the compensation parameter of the BF And obtaining the first BF weight.
  • the receiver 1002 is configured to receive, by the serving base station of the UE, the received quality information that is sent by the UE.
  • the cooperative base station of the UE is a base station that sends data information to the UE and is not a serving base station of the UE.
  • the transmitter 1001 is specifically configured to separately send the determined channel phase difference corresponding to the serving base station of the UE and the coordinated base station of the UE to the serving base station of the UE and the cooperative base station of the UE.
  • An embodiment of the present invention provides a processing device for cooperative transmission, where a processing device that cooperatively transmits determines a channel phase difference of a first base station that is to be obtained after the first base station and the first base station, and a channel phase of the first reference base station.
  • the difference is sent to the first base station and the first reference base station, so that after receiving the corresponding channel phase difference, the base station side can perform channel phase compensation on the first BF weight according to the channel phase difference and the first BF weight, and use
  • the first BF weight of the channel phase compensation transmits data information to the UE.
  • the BF weight can be compensated, thereby reducing the possibility that the signal phases of at least two base stations that simultaneously send data information to the UE are inconsistent, and at least simultaneously transmitting data information to the UE is improved.
  • the effect of the signal superposition of the two base stations thereby realizing the possibility of improving the phase-consistent signal received on the user side, and enhancing the quality of the received information of the user.
  • the embodiment of the present invention provides a system for cooperative transmission. As shown in FIG. 11, the method includes: at least two base stations 1101, a user equipment UE1102, and a cooperatively transmitted processing device 1103. among them,
  • the base station 1101 is the base station described in the foregoing embodiment.
  • the processing device 1103 for cooperative transmission is the processing device for cooperative transmission described in the above embodiments.
  • the embodiment of the invention provides a method, a device and a system for cooperative transmission.
  • the base station compensates the original BF weight by obtaining the compensation parameter of the BF, and obtains the first BF weight.
  • the processing device of the coordinated transmission determines the channel phase difference of the acquired first base station and the channel phase difference of the first reference base station after transmitting the first base station and the first reference base station to the first base station and the first reference Base station.
  • the base station After acquiring the channel phase difference, the base station performs channel phase compensation on the first BF weight according to the channel phase difference and the first BF weight, and sends the data information to the UE by using the first BF weight of the channel phase compensation.
  • the BF weight is compensated, thereby reducing the possibility that the signal phases of at least two base stations that simultaneously transmit data information to the UE are inconsistent, and at least simultaneously transmitting data information to the UE is improved.
  • the effect of the signal superposition of the two base stations thereby realizing the possibility of improving the phase-consistent signal received on the user side, and enhancing the quality of the received information of the user.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)

Abstract

La présente invention concerne le domaine des communications. Des modes de réalisation de la présente invention portent sur un procédé, un dispositif et un système de transmission coordonnée, pour élever la probabilité de recevoir des signaux de phases constantes sur un côté d'utilisateur. Le procédé comprend : une station de base obtenant un paramètre de compensation de formation de faisceau (BF); la station de base réalisant une compensation sur une valeur de poids BF initiale selon le paramètre de compensation BF, pour obtenir une première valeur de poids BF; la station de base réalisant une compensation de phase de canal sur la première valeur de poids BF selon une différence de phase de canal et la première valeur de poids BF, la différence de phase de canal étant un paramètre utilisé pour réaliser une compensation de phase de canal sur la première valeur de poids BF; et la station de base envoyant des informations de données à un équipement utilisateur (UE) selon la première valeur de poids BF après la compensation de phase de canal. La présente invention est adaptée pour envoyer des données à un UE à travers une coordination entre des stations de base.
PCT/CN2012/086210 2012-12-07 2012-12-07 Procédé, dispositif et système de transmission coordonnée WO2014086045A1 (fr)

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PCT/CN2012/086210 WO2014086045A1 (fr) 2012-12-07 2012-12-07 Procédé, dispositif et système de transmission coordonnée

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101753185A (zh) * 2008-12-15 2010-06-23 大唐移动通信设备有限公司 一种实现多小区多天线校准的方法、装置和系统
WO2011122167A1 (fr) * 2010-03-31 2011-10-06 ソニー株式会社 Station de base, système de communication et procédé de communication
CN102739344A (zh) * 2011-04-12 2012-10-17 中兴通讯股份有限公司 一种上报信道状态信息的方法及装置、系统
CN102780520A (zh) * 2011-05-13 2012-11-14 富士通株式会社 从多个发送站进行波束成形

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102685874B (zh) * 2012-04-12 2018-11-23 南京中兴新软件有限责任公司 一种多个接入点间偏差校准方法、系统和装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101753185A (zh) * 2008-12-15 2010-06-23 大唐移动通信设备有限公司 一种实现多小区多天线校准的方法、装置和系统
WO2011122167A1 (fr) * 2010-03-31 2011-10-06 ソニー株式会社 Station de base, système de communication et procédé de communication
CN102739344A (zh) * 2011-04-12 2012-10-17 中兴通讯股份有限公司 一种上报信道状态信息的方法及装置、系统
CN102780520A (zh) * 2011-05-13 2012-11-14 富士通株式会社 从多个发送站进行波束成形

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