WO2020088168A1 - Procédé de calcul d'une valeur de pondération de transmission dans une transmission conjointe (jt) cohérente et dispositif correspondant - Google Patents

Procédé de calcul d'une valeur de pondération de transmission dans une transmission conjointe (jt) cohérente et dispositif correspondant Download PDF

Info

Publication number
WO2020088168A1
WO2020088168A1 PCT/CN2019/108461 CN2019108461W WO2020088168A1 WO 2020088168 A1 WO2020088168 A1 WO 2020088168A1 CN 2019108461 W CN2019108461 W CN 2019108461W WO 2020088168 A1 WO2020088168 A1 WO 2020088168A1
Authority
WO
WIPO (PCT)
Prior art keywords
channels
group
impulse response
channel impulse
rru
Prior art date
Application number
PCT/CN2019/108461
Other languages
English (en)
Chinese (zh)
Inventor
张鹏程
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.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2020088168A1 publication Critical patent/WO2020088168A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/024—Channel estimation channel estimation algorithms
    • H04L25/0242—Channel estimation channel estimation algorithms using matrix methods

Definitions

  • the present application relates to the field of wireless communication technology, and in particular to a method and corresponding device for calculating transmission weights in coherent joint transmission JT.
  • CoMP Coordinated multiple point transmission
  • UE user equipment
  • CoMP technology helps to improve the communication quality of wireless communication, so it is widely used.
  • Joint transmission (joint transmission, JT) technology is a type of CoMP technology, and JT technology can be divided into coherent JT technology and non-coherent JT technology.
  • JT technology can be divided into coherent JT technology and non-coherent JT technology.
  • RRU radio remote units
  • BBU Building Base Band Unit
  • one BBU can usually be connected to at least one RRU.
  • RRU radio remote units
  • BBU Building Base Band Unit
  • each BBU is connected to a different RRU.
  • each RRU is used to jointly participate in the data transmission of the UE.
  • Each RRU transmits the signal that needs to be transmitted to the UE to the BBU connected to itself, and then the BBU according to the transmission weight of each RRU, to the received The signal is weighted, and then the weighted signal is transmitted to the UE to implement coherent JT. That is to say, in the coherent JT process, the transmission weight of each RRU needs to be obtained.
  • each RRU When obtaining the transmission weight of each RRU through the prior art, first integrate the interfaces of each RRU so that each RRU is connected to the same BBU; then, each RRU transmits a channel reference signal to the BBU; the BBU receives the channel reference After the signal, the channel impulse response of each channel of the RRU is determined according to the channel reference signal, and the transmission weight of each RRU is obtained by performing correlation calculation on the channel impulse response.
  • each RRU needs to be connected to the same BBU, that is, the connection method of the RRU and BBU needs to be modified, so it will cost More manpower and material resources.
  • the embodiments of the present application disclose A method and corresponding device for calculating launch weight in coherent JT.
  • an embodiment of the present application provides a method for calculating a transmission weight in a coherent joint transmission JT, including:
  • the baseband processing unit BBU divides the channels of the RRU according to the degrees of freedom of the RRU connected to the remote radio unit;
  • the BBU After receiving the channel reference signal transmitted by the RRU for the same user equipment UE, the BBU determines the original channel impulse response of each divided group of channels according to the channel reference signal;
  • the BBU determines the initial weight of each group of channels according to the original channel impulse response of each group of channels
  • the BBU calculates the equivalent channel impulse response of each group of channels based on the initial weight of each group of channels and the original channel impulse response;
  • the BBU obtains the transmission weight of each group of channels by performing coherent compensation on the equivalent channel impulse response of each group of channels, and the transmission weight of each group of channels is used to characterize the transmission weight of the RRU .
  • the transmission weight of the RRU in the coherent JT can be obtained, and in the coherent JT scenario, each BBU is used to calculate the transmission weight of the RRU connected to it.
  • each BBU calculates the transmission weight
  • Launch weight Therefore, the problem that the connection mode of RRU and BBU needs to be modified in the prior art is solved, saving manpower and material resources.
  • each BBU separately calculates the transmission weight of the RRU connected to itself, and there is no need for a BBU to collectively calculate the transmission weight of all RRUs.
  • the calculation of the BBU The reduction in the amount can reduce the time required for the BBU to calculate the transmission weight, thereby improving the calculation efficiency of the transmission weight.
  • the BBU determining the initial weight of each group of channels according to the original channel impulse response of each group of channels includes:
  • the BBU obtains the original channel impulse response matrix of each group of channels according to the original channel impulse response of each group of channels;
  • the BBU performs matrix decomposition on the original channel impulse response matrix of each group of channels, and obtains the initial weight of each group of channels according to the result of the matrix decomposition.
  • the BBU calculates the initial weight value of each group of channels and the original channel impulse response by using the following formula to obtain the equivalent of each group of channels, etc. Effective channel impulse response:
  • R represents the effective rank of the original channel impulse response matrix of the RRU
  • N1 represents the channel freedom of the first group of channels
  • M represents the number of receiving ports of the UE
  • H l (Nl ⁇ M) represents the first group
  • W l (R ⁇ Nl) represents the initial weight of the first group of channels
  • the solution disclosed in the embodiment of the present application when calculating the transmission weight, it is necessary to establish the original channel impulse response matrix corresponding to each channel.
  • the solution of the embodiment of the present application groups the channels of each RRU, calculates each group of channels separately, and divides the calculation amount in the process of calculating the transmission weight of the RRU into multiple groups by grouping, so that the matrix dimension can be compressed, Further simplify the calculation and increase the calculation speed of the launch weight.
  • the larger the dimension of the matrix the greater the amount of subsequent operations, and the more variables are generated during the operation. Accordingly, the BBU requires more memory to store the variables.
  • the embodiment of the present application simplifies the operation by compressing the matrix dimension, and also reduces the variables that the BBU needs to store, and saves the memory overhead of the BBU.
  • the BBU performs coherent compensation on the equivalent channel impulse response of each group of channels to obtain
  • the transmission weight of each group of channels includes:
  • the BBU separately performs QR decomposition on the equivalent channel impulse response of each group of channels to obtain an orthogonal unitary matrix of each group of channels;
  • the BBU obtains the conjugate transpose matrix of the orthogonal unitary matrix of each group of channels, and performs coherent compensation on the conjugate transpose matrix by the following formula to obtain the transmission weight of each group of channels:
  • R represents the effective rank of the original channel impulse response matrix of the RRU
  • N1 represents the channel degrees of freedom of the first group of channels
  • W l (R ⁇ Nl) Represents the initial weight of the l-th channel
  • l is a positive integer greater than or equal to 1.
  • the BBU performs coherent compensation on the equivalent channel impulse response of each group of channels to obtain
  • the transmission weight of each group of channels includes:
  • the BBU performs coherent compensation on the equivalent channel impulse response of each group of channels through the following formula to obtain the transmission weight of each group of channels:
  • W l (R ⁇ Nl) represents the initial weight of the first group of channels
  • R represents the effective rank of the original channel impulse response matrix of the RRU
  • N1 represents the degree of freedom of the channel of the first group of channels
  • exp represents an exponential function based on the natural constant e
  • j represents an imaginary number symbol
  • theta represents a complex number phase.
  • the method further includes:
  • the BBU After receiving the transmission signal transmitted by the RRU, the BBU uses the transmission weight of each group of channels corresponding to the RRU as the weighting coefficient of the transmission signal of the RRU, and performs weighting processing on the transmission signal;
  • the BBU transmits a weighted transmission signal to the UE.
  • the BBU performs QR decomposition of the equivalent channel impulse response of each group of channels, including:
  • QR decomposition is performed on the group l channel by the following formula:
  • R represents the effective rank of the original channel impulse response matrix of the RRU
  • Nl represents the channel freedom of the first group of channels
  • M represents the UE's The number of receiving ports
  • l is a positive integer greater than or equal to 1.
  • an embodiment of the present application provides an apparatus for calculating a transmission weight in a coherent joint transmission JT, including:
  • the processor is used to divide the channels of the RRU according to the degrees of freedom of the RRU connected to the remote radio unit;
  • the transceiver is used to receive a channel reference signal transmitted by the RRU for the same user equipment UE;
  • the processor is further configured to determine the original channel impulse response of each divided channel group according to the channel reference signal, and determine the initial weight value of each group of channels according to the original channel impulse response of each group of channels, and Calculate the equivalent channel impulse response of each group of channels according to the initial weight of each group of channels and the original channel impulse response, and then obtain the said by coherent compensation of the equivalent channel impulse response of each group of channels.
  • the transmission weight of each group of channels, and the transmission weight of each group of channels is used to characterize the transmission weight of the RRU.
  • the determining, by the processor according to the original channel impulse response of each group of channels, the initial weight value of each group of channels includes: For the original channel impulse response of each group of channels, obtain the original channel impulse response matrix of each group of channels separately, perform matrix decomposition on the original channel impulse response matrix of each group of channels, and obtain each group of channels according to the results of the matrix decomposition Initial weight.
  • the processor calculates the initial weight of each group of channels and the original channel impulse response by using the following formula to obtain the channel of each group Equivalent channel impulse response:
  • R represents the effective rank of the original channel impulse response matrix of the RRU
  • N1 represents the channel freedom of the first group of channels
  • M represents the number of receiving ports of the UE
  • H l (Nl ⁇ M) represents the first group
  • W l (R ⁇ Nl) represents the initial weight of the first group of channels
  • the processor when the number of receiving ports of the UE is greater than 1, the processor performs coherent compensation on the equivalent channel impulse response of each group of channels, Obtaining the transmission weight of each group of channels includes: performing QR decomposition on the equivalent channel impulse response of each group of channels, obtaining the orthogonal unitary matrix of each group of channels, and then obtaining the The conjugate transpose matrix of the orthogonal unitary matrix, and performing coherent compensation on the conjugate transpose matrix by the following formula to obtain the transmission weight of each group of channels:
  • R represents the effective rank of the original channel impulse response matrix of the RRU
  • N1 represents the channel degrees of freedom of the first group of channels
  • W l (R ⁇ Nl) Represents the initial weight of the l-th channel
  • l is a positive integer greater than or equal to 1.
  • the processor when the number of reception ports of the UE is 1, the processor performs the equivalent channel impulse response of each group of channels by the following formula Coherent compensation to obtain the transmission weight of each group of channels:
  • W l (R ⁇ Nl) represents the initial weight of the first group of channels
  • R represents the effective rank of the original channel impulse response matrix of the RRU
  • N1 represents the degree of freedom of the channel of the first group of channels
  • exp represents an exponential function based on the natural constant e
  • j represents an imaginary number symbol
  • theta represents a complex number phase.
  • the processor after acquiring the transmission weight value of each group of channels, is further configured to, after receiving the transmission signal transmitted by the RRU, The transmission weight of each group of channels corresponding to the RRU is used as the weighting coefficient of the transmission signal of the RRU, weighting the transmission signal, and transmitting the transmission signal after the weighting process to the UE.
  • the processor performs QR decomposition on the group l channel by the following formula:
  • R represents the effective rank of the original channel impulse response matrix of the RRU
  • Nl represents the channel freedom of the first group of channels
  • M represents the The number of receiving ports
  • l is a positive integer greater than or equal to 1.
  • an embodiment of the present application provides a device for calculating a transmission weight in a coherent joint transmission JT, including:
  • a channel dividing module configured to divide the channels of the RRU according to the degrees of freedom of the RRU connected to the remote radio unit;
  • a response determining module configured to determine the original channel impulse response of each divided channel group according to the channel reference signal after receiving the channel reference signal transmitted by the RRU for the same user equipment UE;
  • An initial weight determination module configured to determine the initial weight of each group of channels based on the original channel impulse response of each group of channels
  • a response calculation module configured to calculate the equivalent channel impulse response of each group of channels based on the initial weight of each group of channels and the original channel impulse response;
  • a transmission weight acquisition module configured to obtain the transmission weight of each group of channels by coherently compensating for the equivalent channel impulse response of each group of channels, and the transmission weight of each group of channels is used to characterize the RRU launch weight.
  • the initial weight determination module includes:
  • a response matrix obtaining unit configured to obtain the original channel impulse response matrix of each group of channels according to the original channel impulse response of each group of channels;
  • the response matrix decomposition unit is configured to perform matrix decomposition on the original channel impulse response matrix of each group of channels, respectively, and obtain the initial weight of each group of channels according to the result of the matrix decomposition.
  • the response calculation module calculates the initial weight of each group of channels and the original channel impulse response by using the following formula to obtain each group of channels
  • R represents the effective rank of the original channel impulse response matrix of the RRU
  • N1 represents the channel freedom of the first group of channels
  • M represents the number of receiving ports of the UE
  • H l (Nl ⁇ M) represents the first group
  • W l (R ⁇ Nl) represents the initial weight of the first group of channels
  • the transmission weight acquisition module when the number of reception ports of the UE is greater than 1, the transmission weight acquisition module includes:
  • a QR decomposition unit configured to perform QR decomposition on the equivalent channel impulse response of each group of channels to obtain an orthogonal unitary matrix of each group of channels;
  • a transmission weight acquisition unit for acquiring the conjugate transposed matrix of the orthogonal unitary matrix of each group of channels, and performing coherent compensation on the conjugate transposed matrix by the following formula to obtain the transmission weight of each group of channels :
  • R represents the effective rank of the original channel impulse response matrix of the RRU
  • N1 represents the channel degrees of freedom of the first group of channels
  • W l (R ⁇ Nl) Represents the initial weight of the l-th channel
  • l is a positive integer greater than or equal to 1.
  • the transmission weight acquisition module includes:
  • the coherent compensation unit is used to perform coherent compensation on the equivalent channel impulse response of each group of channels by the following formula to obtain the transmission weight of each group of channels:
  • W l (R ⁇ Nl) represents the initial weight of the first group of channels
  • R represents the effective rank of the original channel impulse response matrix of the RRU
  • N1 represents the degree of freedom of the channel of the first group of channels
  • exp represents the exponential function based on the natural constant e
  • j represents the imaginary symbol
  • theta represents the phase of the complex number
  • l is a positive integer greater than or equal to 1.
  • the implementation manner in the fifth possible implementation manner of the third aspect, further includes: a weighting processing module and a signal transmission module,
  • the weighting processing module is configured to use the transmission weight of each group of channels corresponding to the RRU as the RRU after receiving the transmission signal transmitted by the RRU Weighting coefficients of the transmitted signal, weighting the transmitted signal;
  • the signal transmission module is used to transmit the weighted processed transmission signal to the UE.
  • the QR decomposition unit performs QR decomposition on the first group of channels by the following formula:
  • R represents the effective rank of the original channel impulse response matrix of the RRU
  • Nl represents the channel freedom of the first group of channels
  • M represents the UE's The number of receiving ports
  • l is a positive integer greater than or equal to 1.
  • an embodiment of the present application provides a baseband processing unit BBU, including:
  • a memory a processor, and a computer program stored on the memory and executable on the processor.
  • the processor executes the computer program, the method according to the first aspect is implemented.
  • an embodiment of the present application provides a computer-readable medium, including instructions, which when executed on a computer, causes the computer to execute the method according to the first aspect.
  • the transmission weight of the RRU in the coherent JT can be obtained, and in the coherent JT scenario, each BBU connected to the RRU calculates the transmission weight of the RRU connected to it, respectively.
  • each BBU connected to the RRU calculates the transmission weight of the RRU connected to it, respectively.
  • the transmission weight of the RRU connected to itself Therefore, the problem that the connection mode of RRU and BBU needs to be modified in the prior art is solved, saving manpower and material resources.
  • each BBU separately calculates the transmission weight of the RRU connected to itself, and there is no need for a BBU to collectively calculate the transmission weight of all RRUs.
  • the calculation of BBU The reduction in the amount can reduce the time required for the BBU to calculate the transmission weight, thereby improving the calculation efficiency of the transmission weight.
  • 1 is a schematic diagram of an application scenario of coherent joint transmission JT disclosed in the prior art
  • FIG. 2 is a schematic flowchart of a method for calculating a transmission weight in a coherent joint transmission JT disclosed in an embodiment of the present application
  • FIG. 3 is a schematic diagram of a work flow for obtaining transmission weight values of each group of channels in a method for calculating transmission weight values in a coherent joint transmission JT disclosed in an embodiment of the present application;
  • FIG. 4 is a schematic flowchart of a method for calculating a transmission weight in a coherent joint transmission JT disclosed in an embodiment of the present application
  • FIG. 5 is a schematic diagram of a work flow of another method for calculating a transmission weight in a coherent joint transmission JT disclosed in an embodiment of this application;
  • FIG. 6 is a schematic diagram of a work flow of another method for calculating a transmission weight in a coherent joint transmission JT disclosed in an embodiment of the present application;
  • FIG. 7 is a schematic diagram of a work flow of another method for calculating a transmission weight in a coherent joint transmission JT disclosed in an embodiment of the present application;
  • FIG. 8 is a schematic diagram of a work flow of another method for calculating a transmission weight in a coherent joint transmission JT disclosed in an embodiment of the present application;
  • FIG. 9 is a schematic structural diagram of a device for calculating a transmission weight in a coherent joint transmission JT disclosed in an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a BBU disclosed in an embodiment of the present application.
  • the embodiments of the present application disclose a coherent joint launch JT to calculate the launch weight Method and corresponding device.
  • the first embodiment of the present application discloses a method for calculating transmission weights in coherent JT.
  • the method for calculating the transmission weight in the coherent JT includes the following steps:
  • Step S11 The baseband processing unit BBU divides the channels of the RRU according to the degrees of freedom of the RRU connected to itself.
  • each RRU In the application scenario of coherent JT, multiple RRUs often participate in transmitting signals to the UE, and each RRU is connected to the BBU. Among them, a BBU is often connected to multiple RRUs. In the process of coherent JT, the RRU transmits the signal that needs to be sent to the UE to the connected BBU. After receiving the signal transmitted by each RRU connected to itself, the BBU transmits to each RRU according to the transmission weight of each RRU The weighted signal is processed to obtain the weighted signal, and then the weighted signal is transmitted to the UE.
  • the degree of freedom of the channel refers to the dimension of the channel, that is, the number of channels that independently transmit signals.
  • the channel freedom of the RRU refers to the number of channels used by the RRU to independently transmit signals.
  • the BBU divides the RRU channels into channel groups according to the channel degrees of freedom of each RRU, and each channel group includes one or more channels, so as to subsequently calculate the transmission weight value for each group of channels.
  • each channel of the RRU may be divided into a group. For example, if the RRU connected to the BBU includes RRU0 and RRU1, where , RRU0 has 8 channels for transmitting signals, RRU1 has 4 channels for transmitting signals, in this case, the channels of RRU0 can be divided into the same group, and the channels of RRU1 can be divided into The same group.
  • each RRU can be further divided to reduce the complexity of each group of channels in the calculation process. For example, it is also possible to divide the RRU 0 channel into two groups, so that each group has 4 channels, and divide the RRU 1 channel into two groups, so that each group has 2 channels.
  • the channels of different RRUs can also be divided into a group. For example, if the RRU connected to the BBU includes 5 RRUs, the first RRU has 8 channels for transmitting signals, and the other four RRUs have only one channel for transmitting signals. In this case The channels of the first RRU can be divided into two groups, each group has 4 channels, and the channels of the other four RRUs can also be divided into the same group.
  • Step S12 After receiving the channel reference signal transmitted by the RRU for the same user equipment UE, the BBU determines the original channel impulse response of each divided channel group according to the channel reference signal.
  • the original channel impulse response of each group of channels refers to the set of original channel impulse responses of the channels included in the group of channels.
  • Step S13 The BBU determines the initial weight of each group of channels according to the original channel impulse response of each group of channels.
  • the matrix channel decomposition of the original channel impulse response matrix is usually used to extract the important features of the original channel impulse response matrix through matrix decomposition.
  • the initial weight of each group of channels is obtained.
  • Step S14 The BBU calculates the equivalent channel impulse response of each group of channels based on the initial weight of each group of channels and the original channel impulse response.
  • Step S15 The BBU obtains the transmission weight of each group of channels by coherently compensating the equivalent channel impulse response of each group of channels, and the transmission weight of each group of channels is used to characterize the RRU Launch weight.
  • the equivalent channel impulse response of each group of channels is coherently compensated, and the result of the coherent compensation is the transmission weight of the group of channels.
  • the transmission weight of each group of channels can be used to characterize the transmission weight of the RRU corresponding to each group of channels, so that the signals transmitted by the RRU can be weighted according to the transmission weight of each group of channels.
  • the embodiment of the present application discloses a method for calculating the transmission weight in the coherent JT.
  • the BBU divides the channels of the RRU according to the degrees of freedom of the RRU connected to itself; then, after receiving the channel reference signal transmitted by the RRU, the BBU determines each group of channels according to the channel reference signal The original channel impulse response of the original channel; after that, the BBU determines the initial weight of each group of channels according to the original channel impulse response of each group of channels, and calculates the The equivalent channel impulse response of each group of channels; the BBU performs coherent compensation on the equivalent channel impulse response of each group of channels to obtain the transmission weight of each group of channels, characterized by the transmission weight of each group of channels RRU launch weight.
  • the transmission weight of the RRU in the coherent JT can be obtained, and in the coherent JT scenario, each BBU is used to calculate the transmission weight of the RRU connected to it. That is to say, when the scheme disclosed in the embodiment of the present application calculates the transmission weight, there is no need to modify the connection method of RRU and BBU to connect each RRU to the same BBU, but each BBU calculates the RRU connected to itself. Launch weight. Therefore, the problem that the connection mode of RRU and BBU needs to be modified in the prior art is solved, saving manpower and material resources.
  • each BBU separately calculates the transmission weight of the RRU connected to itself, and there is no need for a BBU to collectively calculate the transmission weight of all RRUs.
  • the calculation of BBU The reduction in the amount can reduce the time required for the BBU to calculate the transmission weight, thereby improving the calculation efficiency of the transmission weight.
  • the operation of the BBU to determine the initial weight value of each group of channels according to the original channel impulse response of each group of channels is refined.
  • the operation includes the following steps:
  • the BBU obtains the original channel impulse response matrix of each group of channels according to the original channel impulse response of each group of channels;
  • the BBU separately performs matrix decomposition on the original channel impulse response matrix of each group of channels, and obtains the initial weight of each group of channels according to the result of the matrix decomposition.
  • the original channel impulse response matrix of the channel acquired by the BBU can be expressed by the following formula:
  • N1 represents the channel freedom of the first group of channels
  • M represents the number of receiving ports of the user equipment UE receiving the signal transmitted by the RRU
  • H l (Nl ⁇ M) represents the original channel impact of the first group of channels Response
  • H represents the original channel impulse response
  • l is a positive integer greater than or equal to 1.
  • Each element contained in the original channel impulse response matrix is the original channel impulse response of its corresponding channel when transmitting a signal to its corresponding receiving port, for example, the elements in the first row and first column of the matrix, Represents the first channel in the first group of channels, the original channel impulse response generated when transmitting a signal to the first receiving port of the UE.
  • the original channel impulse response matrix of each group of channels acquired by the BBU can be expressed by the following formula:
  • H 1 (N1 ⁇ M), H 2 (N2 ⁇ M), ..., H K (NK ⁇ M).
  • RRU0 has 8 channels for transmitting signals
  • RRU1 has 4 channels for transmitting signals
  • RRU0 is divided into two groups
  • Each group has 4 channels
  • the channels of RRU 1 are divided into two groups
  • each group has 2 channels
  • N is 12 (that is, the degree of freedom of the channels of each RRU connected to the BBU is 12)
  • k is 4 ( That is, the channels of each RRU connected to the BBU are divided into 4 groups)
  • N1 is 4
  • N2 is 4
  • N3 is 2
  • N4 is 2.
  • M represents the number of receiving ports of the user equipment UE that receives the signals transmitted by the RRU. If the UE receives the signals transmitted by the RRU through multiple receiving ports, M is greater than 1, if the UE receives Signal, M is equal to 1.
  • the original channel impulse response matrix corresponding to each channel needs to be established.
  • the solution of the embodiment of the present application groups the channels of each RRU, calculates each group of channels separately, and divides the calculation amount in the process of calculating the transmission weight of the RRU into multiple groups by grouping, so that the matrix dimension can be compressed, Further simplify the calculation and increase the calculation speed of the launch weight.
  • the larger the dimension of the matrix the greater the amount of subsequent operations, and the more variables are generated during the operation. Accordingly, the BBU requires more memory to store the variables.
  • the embodiment of the present application simplifies the operation by compressing the matrix dimension, and also reduces the variables that the BBU needs to store, and saves the memory overhead of the BBU.
  • the initial weight value of each group of channels is obtained by performing matrix decomposition on the original channel impulse response matrix of each group of channels.
  • matrix decomposition of the original channel impulse response matrix can extract the important features in the original channel impulse response matrix, and use the important features as the initial weight of each group of channels.
  • the method of matrix decomposition may adopt the method of eigenvalue decomposition or the method of singular value decomposition, etc., which is not limited in the embodiments of the present application.
  • the BBU uses the following formula for the initial weight of each group of channels And calculating the original channel impulse response to obtain the equivalent channel impulse response of each group of channels:
  • R represents the effective rank of the original channel impulse response matrix of the RRU
  • N1 represents the channel freedom of the first group of channels
  • M represents the number of receiving ports of the UE
  • H l (Nl ⁇ M) represents the first group
  • W l (R ⁇ Nl) represents the initial weight of the first group of channels
  • l is a positive integer greater than or equal to 1.
  • R represents the effective rank of the original channel impulse response matrix of each RRU connected to the BBU, that is, if the channel freedom of each RRU connected to the BBU is N, the user equipment receiving the signal transmitted by the RRU If the number of receiving ports of the UE is M, the original channel impulse response matrix of each RRU connected to the BBU is H (N ⁇ M), and each element in the matrix is used to represent the original channel impulse response of the channel corresponding to the element , R represents the effective rank of H (N ⁇ M).
  • the number of receiving ports used by the UE to receive signals transmitted by the RRU may be one or more.
  • the equivalent channel impulse response of each group of channels is coherently compensated in different ways to obtain the transmission weight of each group of channels.
  • the BBU performs coherent compensation on the equivalent channel impulse response of each group of channels to obtain the transmission right of each group of channels Value, including the following steps:
  • Step S21 The BBU performs QR decomposition on the equivalent channel impulse response of each group of channels to obtain the orthogonal unitary matrix of each group of channels.
  • R represents the effective rank of the original channel impulse response matrix of the RRU
  • Nl represents the channel freedom of the first group of channels
  • M represents the The number of receiving ports
  • l is a positive integer greater than or equal to 1.
  • orthogonal unitary matrix of each group of channels can be calculated by the following formula:
  • Step S22 The BBU obtains the conjugate transpose matrix of the orthogonal unitary matrix of each group of channels, and performs coherent compensation on the conjugate transpose matrix by the following formula to obtain the transmission weight of each group of channels:
  • R represents the effective rank of the original channel impulse response matrix of the RRU
  • N1 represents the channel degrees of freedom of the first group of channels
  • W l (R ⁇ Nl) Represents the initial weight of the l-th channel
  • l is a positive integer greater than or equal to 1.
  • the transmission weight of each group of channels can be calculated by the following formula:
  • steps S21 to S22 it is possible to obtain the transmission weight of each group of channels when the number of reception ports of the UE receiving the signal transmitted by the RRU is greater than one.
  • the BBU performs coherent compensation on the equivalent channel impulse response of each group of channels to obtain the transmission weight of each group of channels, including:
  • the BBU performs coherent compensation on the equivalent channel impulse response of each group of channels through the following formula to obtain the transmission weight of each group of channels:
  • W l (R ⁇ Nl) represents the initial weight of the first group of channels
  • R represents the effective rank of the original channel impulse response matrix of the RRU
  • N1 represents the degree of freedom of the channel of the first group of channels
  • exp represents an exponential function based on the natural constant e
  • j represents an imaginary number symbol
  • theta represents a complex number phase.
  • i is also commonly used to represent imaginary symbols. specific, Express This complex phase, Imaginary number For e Power.
  • the transmission weight of each group of channels can be calculated.
  • each RRU connected to the BBU needs to transmit signals to multiple UEs, and each UE receives the number of reception ports of the UE to transmit the signals transmitted by the RRU Greater than 1.
  • the RRUs connected to the BBU are set to RRU 0 and RRU 1, respectively, and the multiple UEs are UE 0 and UE 1, respectively.
  • the same RRU responds differently to the original channel impact of different UEs, and the BBU may calculate transmission weights for different UEs according to the solutions disclosed in the embodiments of the present application.
  • the BBU groups the RRU0 and RRU1 channels.
  • the RRU0 channels are divided into one or more channel groups, and the RRU1 channels are divided into one or more channels. group.
  • the initial weight value of each group of channels for different UEs ie, UE0 and UE1 is calculated according to the original channel impulse response of each group of channels against different UEs.
  • the equivalent channel impulse response is QR decomposed by the following formula:
  • the BBU After obtaining the conjugate transpose matrix of the orthogonal unitary matrix of each group of channels, the BBU performs coherent compensation on the conjugate transpose matrix by the following formula to obtain the transmission weight value of each group of channels for different UEs:
  • each RRU connected to the BBU needs to transmit a signal to a UE, and the number of receiving ports of the UE that the UE receives the signal transmitted by the RRU is greater than 1. .
  • the RRUs connected to the BBU are set to RRU 0 and RRU 1, respectively.
  • the BBU groups the RRU0 and RRU1 channels.
  • the RRU0 channels are divided into one or more channel groups, and the RRU1 channels are divided into one or more channels. group.
  • the initial weight of each group of channels is calculated based on the original channel impulse response of each group of channels.
  • the equivalent channel impulse response is QR decomposed by the following formula:
  • the BBU After obtaining the conjugate transpose matrix of the orthogonal unitary matrix of each group of channels, the BBU performs coherent compensation on the conjugate transpose matrix by the following formula to obtain the transmission weight of each group of channels:
  • each RRU connected to the BBU needs to transmit signals to multiple UEs, and each UE receives the number of receiving ports of the UE to transmit the signals transmitted by the RRU Is 1.
  • the RRUs connected to the BBU are set to RRU 0 and RRU 1, respectively, and the multiple UEs are UE 0 and UE 1, respectively.
  • the same RRU responds differently to the original channel impact of different UEs, and the BBU may calculate transmission weights for different UEs according to the solutions disclosed in the embodiments of the present application.
  • the BBU groups the RRU0 and RRU1 channels.
  • the RRU0 channels are divided into one or more channel groups, and the RRU1 channels are divided into one or more channels. group.
  • the initial weight value of each group of channels for different UEs is calculated according to the original channel impulse response of each group of channels against different UEs.
  • the equivalent channel impulse response of each group of channels is correlated by the following formula Compensation, obtain the transmission weight of each group of channels:
  • each RRU connected to the BBU needs to transmit a signal to a UE, and the number of receiving ports of the UE that the UE receives the signal transmitted by the RRU is 1 .
  • the RRUs connected to the BBU are set to RRU 0 and RRU 1, respectively.
  • the BBU groups the RRU0 and RRU1 channels.
  • the RRU0 channels are divided into one or more channel groups, and the RRU1 channels are divided into one or more channels. group.
  • the initial weight of each group of channels is calculated based on the original channel impulse response of each group of channels.
  • each RRU connected to the BBU needs to transmit a signal to multiple UEs, and each UE receives the number of reception ports of the UE to transmit the signal transmitted by the RRU Greater than 1.
  • the RRUs connected to the BBU are set to RRU 0, RRU 1, RRU 2, RRU 3, and RRU 4, and multiple UEs are UE 0 and UE 1, respectively.
  • the same RRU responds differently to the original channel impact of different UEs, and the BBU may calculate transmission weights for different UEs according to the solutions disclosed in the embodiments of the present application.
  • the BBU groups the RRU0 and RRU1 channels.
  • the RRU0 channels are divided into one or more channel groups, and RRU1, RRU2, RRU3 and The channels of RRU 4 are divided into a channel group.
  • the initial weight of each group of channels for different UEs ie, UE0 and UE1 is calculated according to the original channel impulse response of each group of channels against different UEs.
  • the equivalent channel impulse response is QR decomposed by the following formula:
  • the BBU After obtaining the conjugate transpose matrix of the orthogonal unitary matrix of each group of channels, the BBU performs coherent compensation on the conjugate transpose matrix by the following formula to obtain the transmission weight value of each group of channels for different UEs:
  • the method further includes the following steps:
  • the BBU uses the transmission weight of each group of channels corresponding to the RRU as the weighting coefficient of the transmission signal of the RRU, and performs weighting processing on the transmission signal.
  • the BBU transmits a weighted transmission signal to the UE.
  • the transmission weight of each group of channels is used to characterize the transmission weight of the RRU corresponding to the channel.
  • the transmission weight of each group of channels corresponding to the RRU can be used For weighting.
  • the RRU connected to the BBU includes RRU0 and RRU1
  • the channels of RRU0 are divided into two groups
  • the channels of RRU1 are divided into four groups.
  • the RRU0 is mapped to The transmission weight of the two groups of channels is used as the weighting coefficient of the transmitted signal of RRU0
  • the transmission weight of the four groups of channels corresponding to RRU1 is used as the weighting coefficient of the transmitted signal of RRU1, and the weighting process is performed accordingly to obtain the weighting process
  • the transmitted signal is then transmitted to the UE after the weighted processed transmitted signal.
  • the weighted transmission signal can be : RRU0 transmitted signal * (c1 + c2) + RRU1 transmitted signal * (c3 + c4 + c5 + c6).
  • the RRU connected to the BBU includes RRU0, RRU1, RRU2, RRU3 and RRU4, the channels of RRU0 are divided into two channel groups, and the channel division of RRU1, RRU2, RRU3 and RRU4 It is a channel group.
  • the transmission weights of the two groups of channels corresponding to RRU0 are used as the transmission signal of RRU0
  • the weighting coefficient and the transmission weight of a group of channels corresponding to RRU1, RRU2, RRU3, and RRU4 are used as the weighting coefficient of the transmitted signals of RRU1, RRU2, RRU3, and RRU4, and the weighting process is performed accordingly.
  • the transmitted signal of can be: the transmitted signal of RRU0 * (c1 + c2) + (the transmitted signal of RRU1 + the transmitted signal of RRU2 + the transmitted signal of RRU3 + the transmitted signal of RRU4) * c3.
  • a device for calculating a transmission weight in a coherent joint transmission JT includes a transceiver and a processor.
  • the processor is used to divide the channels of the RRU according to the degrees of freedom of the RRU connected to the remote radio unit;
  • the transceiver is used to receive a channel reference signal transmitted by the RRU for the same user equipment UE;
  • the processor is further configured to determine the original channel impulse response of each divided channel group according to the channel reference signal, and determine the initial weight value of each group of channels according to the original channel impulse response of each group of channels, and Calculate the equivalent channel impulse response of each group of channels according to the initial weight of each group of channels and the original channel impulse response, and then obtain the said by coherent compensation of the equivalent channel impulse response of each group of channels.
  • the transmission weight of each group of channels, and the transmission weight of each group of channels is used to characterize the transmission weight of the RRU.
  • the transmission weight of the RRU in the coherent JT can be obtained, and in the coherent JT scenario, each BBU is used to calculate the transmission weight of the RRU connected to it.
  • each BBU calculates the transmission weight
  • Launch weight Therefore, the problem that the connection mode of RRU and BBU needs to be modified in the prior art is solved, saving manpower and material resources.
  • each BBU separately calculates the transmission weight of the RRU connected to itself, and there is no need for a BBU to collectively calculate the transmission weight of all RRUs.
  • the calculation of BBU The reduction in the amount can reduce the time required for the BBU to calculate the transmission weight, thereby improving the calculation efficiency of the transmission weight.
  • the processor determines the initial weight of each group of channels according to the original channel impulse response of each group of channels,
  • the method includes: obtaining the original channel impulse response matrix of each group of channels according to the original channel impulse response of each group of channels, respectively performing matrix decomposition on the original channel impulse response matrix of each group of channels, and obtaining respectively according to the results of the matrix decomposition The initial weight of each group of channels.
  • the processor calculates the initial weight of each group of channels and the original channel impulse response by the following formula to obtain Describe the equivalent channel impulse response of each group of channels:
  • R represents the effective rank of the original channel impulse response matrix of the RRU
  • N1 represents the channel freedom of the first group of channels
  • M represents the number of receiving ports of the UE
  • H l (Nl ⁇ M) represents the first group
  • W l (R ⁇ Nl) represents the initial weight of the first group of channels
  • obtaining the transmission weight of each group of channels includes: performing QR decomposition on the equivalent channel impulse response of each group of channels, obtaining the orthogonal unitary matrix of each group of channels, and then obtaining Describe the conjugate transpose matrix of the orthogonal unitary matrix of each group of channels, and perform coherent compensation on the conjugate transpose matrix by the following formula to obtain the transmission weight of each group of channels:
  • R represents the effective rank of the original channel impulse response matrix of the RRU
  • N1 represents the channel degrees of freedom of the first group of channels
  • W l (R ⁇ Nl) Represents the initial weight of the l-th channel
  • l is a positive integer greater than or equal to 1.
  • the processor uses the following formula to equalize each group of channels Effective channel impulse response is coherently compensated to obtain the transmission weight of each group of channels:
  • W l (R ⁇ Nl) represents the initial weight of the first group of channels
  • R represents the effective rank of the original channel impulse response matrix of the RRU
  • N1 represents the degree of freedom of the channel of the first group of channels
  • exp represents an exponential function based on the natural constant e
  • j represents an imaginary number symbol
  • theta represents a complex number phase.
  • the processor after acquiring the transmission weight of each group of channels, the processor is further configured to receive the RRU transmission After transmitting the signal, the transmission weight of each group of channels corresponding to the RRU is used as the weighting coefficient of the transmission signal of the RRU, weighting the transmission signal, and transmitting the weighted transmission signal to the UE .
  • the device for calculating the transmission weight in the coherent joint transmission JT includes: a channel division module 110, a response determination module 120, an initial weight determination module 130, a response calculation module 140, and a transmission weight acquisition module 150.
  • the channel dividing module 110 is configured to divide the channels of the RRU according to the degrees of freedom of the RRU connected to the remote radio unit;
  • the response determining module 120 is configured to, after receiving the channel reference signal transmitted by the RRU for the same user equipment UE, determine the original channel impulse response of each divided channel group according to the channel reference signal;
  • the initial weight determination module 130 is configured to determine the initial weight of each group of channels according to the original channel impulse response of each group of channels;
  • the response calculation module 140 is configured to calculate an equivalent channel impulse response of each group of channels based on the initial weight of each group of channels and the original channel impulse response;
  • the transmission weight acquisition module 150 is configured to obtain the transmission weight of each group of channels by coherently compensating for the equivalent channel impulse response of each group of channels, and the transmission weight of each group of channels is used to Characterize the transmission weight of the RRU.
  • the transmission weight of the RRU in the coherent JT can be obtained, and in the coherent JT scenario, each BBU is used to calculate the transmission weight of the RRU connected to it.
  • each BBU calculates the transmission weight
  • Launch weight Therefore, the problem that the connection mode of RRU and BBU needs to be modified in the prior art is solved, saving manpower and material resources.
  • each BBU separately calculates the transmission weight of the RRU connected to itself, and there is no need for a BBU to collectively calculate the transmission weight of all RRUs.
  • the calculation of BBU The reduction in the amount can reduce the time required for the BBU to calculate the transmission weight, thereby improving the calculation efficiency of the transmission weight.
  • the initial weight determination module 130 includes:
  • a response matrix obtaining unit configured to obtain the original channel impulse response matrix of each group of channels according to the original channel impulse response of each group of channels;
  • the response matrix decomposition unit is configured to perform matrix decomposition on the original channel impulse response matrix of each group of channels, respectively, and obtain the initial weight of each group of channels according to the result of the matrix decomposition.
  • the original channel impulse response matrix of the channel acquired by the BBU can be expressed by the following formula:
  • N1 represents the channel freedom of the first group of channels
  • M represents the number of receiving ports of the user equipment UE receiving the signal transmitted by the RRU
  • H l (Nl ⁇ M) represents the original channel impact of the first group of channels Response
  • H represents the original channel impulse response
  • l is a positive integer greater than or equal to 1.
  • the response calculation module 140 calculates the initial weight of each group of channels and the original channel impulse response by the following formula, Obtain the equivalent channel impulse response of each group of channels:
  • R represents the effective rank of the original channel impulse response matrix of the RRU
  • N1 represents the channel freedom of the first group of channels
  • M represents the number of receiving ports of the UE
  • H l (Nl ⁇ M) represents the first group
  • W l (R ⁇ Nl) represents the initial weight of the first group of channels
  • R represents the effective rank of the original channel impulse response matrix of each RRU connected to the BBU, that is, if the channel freedom of each RRU connected to the BBU is N, the user equipment receiving the signal transmitted by the RRU If the number of receiving ports of the UE is M, the original channel impulse response matrix of each RRU connected to the BBU is H (N ⁇ M), and each element in the matrix is used to represent the original channel impulse response of the channel corresponding to the element , R represents the effective rank of H (N ⁇ M).
  • the number of receiving ports used by the UE to receive signals transmitted by the RRU may be one or more.
  • the equivalent channel impulse response of each group of channels is coherently compensated in different ways to obtain the transmission weight of each group of channels.
  • the transmission weight acquisition module 150 when the number of reception ports of the UE is greater than 1, the transmission weight acquisition module 150 includes:
  • a QR decomposition unit configured to perform QR decomposition on the equivalent channel impulse response of each group of channels to obtain an orthogonal unitary matrix of each group of channels;
  • a transmission weight acquisition unit for acquiring the conjugate transposed matrix of the orthogonal unitary matrix of each group of channels, and performing coherent compensation on the conjugate transposed matrix by the following formula to obtain the transmission weight of each group of channels :
  • R represents the effective rank of the original channel impulse response matrix of the RRU
  • N1 represents the channel degrees of freedom of the first group of channels
  • W l (R ⁇ Nl) Represents the initial weight of the l-th channel
  • l is a positive integer greater than or equal to 1.
  • the transmission weight acquisition module 150 includes:
  • the coherent compensation unit is used to perform coherent compensation on the equivalent channel impulse response of each group of channels by the following formula to obtain the transmission weight of each group of channels:
  • W l (R ⁇ Nl) represents the initial weight of the first group of channels, Represents the equivalent channel impulse response of the first group of channels in the coherent JT process, R represents the effective rank of the original channel impulse response matrix of the RRU, and N1 represents the channel freedom of the first group of channels Represents the transmission weight of the first group of channels, exp represents an exponential function based on the natural constant e, j represents an imaginary number symbol, and theta represents a complex number phase.
  • the device for calculating the transmission weight in the coherent joint transmission JT further includes: a weighting processing module and a signal transmission module,
  • the weighting processing module is configured to use the transmission weight of each group of channels corresponding to the RRU as the RRU after receiving the transmission signal transmitted by the RRU Weighting coefficients of the transmitted signal, weighting the transmitted signal;
  • the signal transmission module is used to transmit the weighted processed transmission signal to the UE.
  • the transmission weight of each group of channels is used to characterize the transmission weight of the RRU corresponding to the channel.
  • the transmission weight of each group of channels corresponding to the RRU may be For weighting.
  • FIG. 10 shows a possible structural schematic diagram of the baseband processing unit BBU involved in the foregoing embodiment.
  • the BBU includes: a memory, a processor 200, and a computer program stored on the memory and executable on the processor.
  • the transceiver 100 may be included, and the memory may include a random access memory 300, a read-only memory 400, and a bus 500.
  • the processor 200 is coupled to the transceiver 100, the random access memory 300, and the read-only memory 400 through the bus 500, respectively.
  • the basic input and output system solidified in the read-only memory 400 or the bootloader boot system in the embedded system is used to start, and the BBU is guided to enter a normal operating state. After the BBU enters the normal operating state, the application program and the operating system are run in the random access memory 300, so that when the processor executes the computer program, the methods described in the above embodiments are implemented.
  • the processor is used to divide the channels of the RRU according to the degrees of freedom of the RRU connected to the remote radio unit;
  • the transceiver is used to receive the channel reference signal transmitted by the RRU for the same user equipment UE;
  • the processor is further configured to determine the original channel impulse response of each divided channel group according to the channel reference signal, and determine the initial weight value of each group of channels according to the original channel impulse response of each group of channels, and Calculate the equivalent channel impulse response of each group of channels according to the initial weight of each group of channels and the original channel impulse response, and then obtain the said by coherent compensation of the equivalent channel impulse response of each group of channels.
  • the transmission weight of each group of channels, and the transmission weight of each group of channels is used to characterize the transmission weight of the RRU.
  • the BBU in the embodiment of the present invention may correspond to the BBU in the embodiments corresponding to the foregoing FIGS. 2 to 8, and the processor and memory in the BBU may implement the BBU in the embodiments corresponding to FIGS. 2 to 8.
  • an embodiment of the present application further provides a computer-readable medium, where the computer-readable medium may store a program, and when the program is executed, it may implement calculations including coherent joint transmission JT provided in FIGS. 2 to 8. Some or all steps of the launch weight method.
  • the storage medium in any device can be magnetic disk, optical disk, read-only memory (English: read-only memory, ROM) or random storage memory (English: random access memory, RAM).
  • the processor may be a central processing unit (CPU), a network processor (NP), or a combination of CPU and NP.
  • the processor may further include a hardware chip.
  • the hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof.
  • the PLD may be a complex programmable logic device (complex programmable logic device (CPLD), a field programmable logic gate array (field-programmable gate array, FPGA), a general array logic (generic array logic, GAL), or any combination thereof.
  • the memory may include volatile memory (volatile memory), such as random-access memory (RAM); the memory may also include non-volatile memory (non-volatile memory), such as read-only memory (read-only) memory, ROM), flash memory (flash memory), hard disk (HDD) or solid-state drive (SSD); the memory may also include a combination of the above types of memory.
  • volatile memory volatile memory
  • non-volatile memory non-volatile memory
  • read-only memory read-only memory
  • ROM read-only memory
  • flash memory flash memory
  • HDD hard disk
  • SSD solid-state drive
  • the memory may also include a combination of the above types of memory.
  • the various illustrative logic units and circuits described in the embodiments of the present application may be implemented by a general-purpose processor, a digital signal processor, an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices. Discrete gate or transistor logic, discrete hardware components, or any combination of the above are designed to implement or operate the described functions.
  • the general-purpose processor may be a microprocessor, and optionally, the general-purpose processor may also be any conventional processor, controller, microcontroller, or state machine.
  • the processor may also be implemented by a combination of computing devices, such as a digital signal processor and a microprocessor, multiple microprocessors, one or more microprocessors combined with a digital signal processor core, or any other similar configuration achieve.
  • the steps of the method or algorithm described in the embodiments of the present application may be directly embedded in hardware, a software unit executed by a processor, or a combination of both.
  • the software unit may be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium in the art.
  • the storage medium may be connected to the processor, so that the processor can read information from the storage medium and can write information to the storage medium.
  • the storage medium may also be integrated into the processor.
  • the processor and the storage medium may be provided in the ASIC, and the ASIC may be provided in the UE.
  • the processor and the storage medium may also be provided in different components in the UE.
  • the size of the sequence number of each process does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not be used for the embodiments of this application.
  • the implementation process constitutes no limitation.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a dedicated computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be from a website site, computer, server or data center Transmit to another website, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device including a server, a data center, and the like integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, Solid State Disk (SSD)) or the like.
  • a magnetic medium for example, a floppy disk, a hard disk, a magnetic tape
  • an optical medium for example, a DVD
  • a semiconductor medium for example, Solid State Disk (SSD)
  • the technology in the embodiments of the present invention can be implemented by means of software plus a necessary general hardware platform.
  • the technical solutions in the embodiments of the present invention can be embodied in the form of software products in essence or part of contributions to the existing technology, and the computer software products can be stored in a storage medium, such as ROM / RAM , Magnetic disks, optical disks, etc., including several instructions to enable a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention or some parts of the embodiments.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Radio Transmission System (AREA)

Abstract

La présente invention concerne un procédé de calcul d'une valeur de pondération de transmission dans une transmission conjointe (JT) cohérente et un dispositif correspondant. Le procédé d'après la présente invention comprend les étapes consistant à : au moyen d'une BBU, diviser les canaux d'une RRU sur la base du degré de liberté des canaux de la RRU connectée ; lorsqu'il est reçu un signal de référence de canal émis par la RRU pour un même UE, déterminer une réponse impulsionnelle de canal brute de chaque groupe des canaux divisés ; déterminer une valeur de pondération initiale de chaque groupe de canaux sur la base de la réponse impulsionnelle de canal brute ; calculer une réponse impulsionnelle de canal équivalente de chaque groupe de canaux sur la base de la valeur de pondération initiale et de la réponse impulsionnelle de canal brute de chaque groupe de canaux ; et acquérir une valeur de pondération de transmission de chaque groupe de canaux au moyen d'une compensation cohérente par rapport à la réponse impulsionnelle de canal équivalente. Grâce à la solution d'après les modes de réalisation de la présente invention, lors du calcul de la valeur de pondération de transmission dans une JT cohérente de la RRU, il est inutile de modifier le mode de connexion de la RRU à la BBU, ce qui règle le problème de l'art antérieur dû à la nécessité d'une telle modification. Par conséquent, ladite solution économise du travail ainsi que des matériaux.
PCT/CN2019/108461 2018-11-01 2019-09-27 Procédé de calcul d'une valeur de pondération de transmission dans une transmission conjointe (jt) cohérente et dispositif correspondant WO2020088168A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811296049.0A CN111130582B (zh) 2018-11-01 2018-11-01 一种相干联合发射jt中计算发射权值的方法及相应装置
CN201811296049.0 2018-11-01

Publications (1)

Publication Number Publication Date
WO2020088168A1 true WO2020088168A1 (fr) 2020-05-07

Family

ID=70463428

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/108461 WO2020088168A1 (fr) 2018-11-01 2019-09-27 Procédé de calcul d'une valeur de pondération de transmission dans une transmission conjointe (jt) cohérente et dispositif correspondant

Country Status (2)

Country Link
CN (1) CN111130582B (fr)
WO (1) WO2020088168A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113949468A (zh) * 2020-07-17 2022-01-18 华为技术有限公司 发射通道的初相校正方法及装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102413077A (zh) * 2010-09-25 2012-04-11 大唐移动通信设备有限公司 一种天线发送信号幅度调整方法及装置
CN103918195A (zh) * 2011-11-07 2014-07-09 摩托罗拉移动有限责任公司 在具有协作多点传输的正交频分复用通信***中联合处理方案的csi反馈的方法和装置
WO2015100596A1 (fr) * 2013-12-31 2015-07-09 华为技术有限公司 Procédé, dispositif et système pour supprimer du bruit de fond de liaison montante dans un système réparti d'intérieur
CN105656815A (zh) * 2014-11-11 2016-06-08 华为技术有限公司 一种射频通道的校正方法及装置
CN106330350A (zh) * 2015-06-30 2017-01-11 华为技术有限公司 多远程射频单元联合通道校正的方法和相关装置

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101741439B (zh) * 2008-11-10 2013-06-05 中兴通讯股份有限公司 一种多点协作传输方法
CN101583161B (zh) * 2009-05-26 2013-02-13 北京邮电大学 协作节点单元选择方法及装置
JP5367843B2 (ja) * 2009-12-16 2013-12-11 株式会社東芝 無線信号処理装置及び無線装置
DE102010000909B4 (de) * 2010-01-14 2017-06-22 Airbus Operations Gmbh Vorrichtung zum Bereitstellen von Radiofrequenzsignalverbindungen
US9331765B2 (en) * 2011-02-01 2016-05-03 Blackberry Limited Mixed rank downlink multi-user interference alignment scheme
CA2826243C (fr) * 2011-02-01 2016-06-21 Research In Motion Limited Programme d'alignement d'interferences multi-utilisateurs d'element de liaison descendante de rang mixte
CN103259581B (zh) * 2012-02-16 2016-08-03 电信科学技术研究院 一种进行天线校准的方法、***和设备
US20130250876A1 (en) * 2012-03-14 2013-09-26 Nokia Siemens Networks Oy Method And Apparatus Providing Inter-Transmission Point Phase Relationship Feedback For Joint Transmission CoMP
CN103457651B (zh) * 2012-05-31 2016-08-24 华为技术有限公司 联合通道校正方法、联合通道校正单元及基站
CN102891708A (zh) * 2012-09-17 2013-01-23 华为技术有限公司 收发通道响应的校正方法、装置、***及bbu
CN103716075B (zh) * 2012-09-29 2016-12-21 华为技术有限公司 一种多个射频拉远单元间联合通道校正的方法和装置
CN104468425B (zh) * 2013-09-13 2019-02-26 华为技术有限公司 一种远端射频单元通道校正方法、装置和***
WO2016090644A1 (fr) * 2014-12-12 2016-06-16 华为技术有限公司 Dispositif, système de communication et procédé de gestion collaborative de stations de base
CN106470173A (zh) * 2015-08-17 2017-03-01 上海无线通信研究中心 一种bbu-rru数据压缩方法
CN105721026B (zh) * 2015-12-31 2019-12-17 华为技术有限公司 一种联合数据传输方法及设备
JP6702605B2 (ja) * 2016-06-17 2020-06-03 ホアウェイ・テクノロジーズ・カンパニー・リミテッド チャネル補正方法及びチャネル補正装置並びに通信システム

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102413077A (zh) * 2010-09-25 2012-04-11 大唐移动通信设备有限公司 一种天线发送信号幅度调整方法及装置
CN103918195A (zh) * 2011-11-07 2014-07-09 摩托罗拉移动有限责任公司 在具有协作多点传输的正交频分复用通信***中联合处理方案的csi反馈的方法和装置
WO2015100596A1 (fr) * 2013-12-31 2015-07-09 华为技术有限公司 Procédé, dispositif et système pour supprimer du bruit de fond de liaison montante dans un système réparti d'intérieur
CN105656815A (zh) * 2014-11-11 2016-06-08 华为技术有限公司 一种射频通道的校正方法及装置
CN106330350A (zh) * 2015-06-30 2017-01-11 华为技术有限公司 多远程射频单元联合通道校正的方法和相关装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113949468A (zh) * 2020-07-17 2022-01-18 华为技术有限公司 发射通道的初相校正方法及装置

Also Published As

Publication number Publication date
CN111130582A (zh) 2020-05-08
CN111130582B (zh) 2022-02-25

Similar Documents

Publication Publication Date Title
EP2849384B1 (fr) Procédé de mise en correspondance approximative et dispositif associé ainsi que système de communication
US11172394B2 (en) Method for channel state information CSI measurement, terminal device and network device
WO2020143784A1 (fr) Procédé et dispositif de mesure
WO2022199478A1 (fr) Procédé de rapport d'informations d'état de canal (csi) et produit associé
WO2020088168A1 (fr) Procédé de calcul d'une valeur de pondération de transmission dans une transmission conjointe (jt) cohérente et dispositif correspondant
WO2020108506A1 (fr) Procédé d'identification de source d'interférence, dispositif associé et support de stockage informatique
US11558096B2 (en) Physical uplink control channel resource determination method and communication device
CN111181621B (zh) 一种天线选择的方法及装置
CN114762265A (zh) 将窗口化fd基础映射到用于pmi报告和使用的组合指示
WO2020118728A1 (fr) Procédé et appareil de communication
CN110417523B (zh) 信道估计方法和装置
WO2019196886A1 (fr) Procédé et appareil pour la détermination d'une matrice de précodage
WO2022127639A1 (fr) Procédé de rapport pour des informations d'état de canal, csi, et produit associé
WO2021057121A1 (fr) Procédé et appareil d'indication de capacité de traitement d'ue, dispositif électronique et support d'informations
CN107431670B (zh) 信道估计方法、装置和***
WO2016023410A1 (fr) Procédé et appareil de précodage de canal de liaison descendante
WO2021087793A1 (fr) Procédé de traitement d'informations et dispositif terminal
CN107113863A (zh) 确定数据传输方案的方法和设备
CN108347316B (zh) 一种csi-rs的映射及传输方法和通信设备
TWI658368B (zh) 感應器評估伺服器以及感應器評估方法
US10616783B2 (en) Device grouping based on reported channel information and communication performance
CN107888346B (zh) 一种csi-rs的映射及传输方法和通信设备
WO2022262687A1 (fr) Procédé et appareil de traitement de données
WO2023169430A1 (fr) Procédé de transmission pusch, terminal, et dispositif côté réseau
WO2022100206A1 (fr) Procédé et appareil de précodage multiutilisateur et dispositif

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19880794

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19880794

Country of ref document: EP

Kind code of ref document: A1