WO2020061781A1 - 通信方法、装置及*** - Google Patents

通信方法、装置及*** Download PDF

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Publication number
WO2020061781A1
WO2020061781A1 PCT/CN2018/107430 CN2018107430W WO2020061781A1 WO 2020061781 A1 WO2020061781 A1 WO 2020061781A1 CN 2018107430 W CN2018107430 W CN 2018107430W WO 2020061781 A1 WO2020061781 A1 WO 2020061781A1
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WIPO (PCT)
Prior art keywords
communication device
information
power information
reference signal
ports
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PCT/CN2018/107430
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English (en)
French (fr)
Inventor
李雪茹
张瑞齐
刘鹍鹏
周永行
Original Assignee
华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201880097660.2A priority Critical patent/CN112740564B/zh
Priority to PCT/CN2018/107430 priority patent/WO2020061781A1/zh
Publication of WO2020061781A1 publication Critical patent/WO2020061781A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • 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
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting

Definitions

  • the embodiments of the present application relate to communication technologies, and in particular, to a communication method, device, and system.
  • a multi-input multi-output (MIMO) system is a system that uses multiple transmitting antennas and multiple receiving antennas to transmit and receive signals.
  • the MIMO system can send multiple data streams to one receiving end simultaneously, or multiple Each receiving end sends multiple data streams, thereby significantly improving the spectral efficiency of the system.
  • the design of the precoding matrix P used by the transmitting end and the receiver matrix G used by the receiving end has an important influence on the system performance.
  • the following data transmission is used as an example.
  • the sender is a network device and the receiver is a terminal device. Network devices need to send data to multiple terminal devices at the same time.
  • the precoding matrix P used by network devices should minimize the interference between different data streams, and improve the data reception signal-to-noise ratio of each terminal device.
  • the receiver matrix G needs to suppress the interference of other data streams to its own data stream as much as possible, and further improve its own receive signal-to-noise ratio.
  • a precoding matrix P of a network device and a receiver matrix G of at least one terminal device are optimized in a joint iterative optimization manner.
  • the precoding matrix P needs to obtain the relative gains of the channels of multiple terminal devices being served and the relative gains of the channels of different ports on the same receiving end.
  • the current technology cannot enable the transmitting end to obtain the accurate value of the foregoing relative gain, so that the value of the precoding matrix P cannot match the actual channel, and the performance of data transmission is affected.
  • TDD time division duplex
  • the channel information obtained by the uplink reference signal includes the transmission power of the uplink reference signal. Due to the non-ideal factors of the devices of the terminal equipment, the network equipment cannot know the actual uplink reference signal transmission power, and therefore cannot remove the influence of this power from the measurement results. Since the uplink reference signal transmission power of different terminal devices may be different, the relative gains of the channels of different terminal devices cannot be obtained by measuring the uplink channels. Therefore, the precoding matrix P obtained according to the prior art cannot match an actual channel.
  • a first aspect of the embodiments of the present application provides a communication method, which includes:
  • the second communication device acquires the first instruction information, the second communication device receives the first reference signal, and the second communication device sends at least one power information of the first reference signal, where the at least one power information is based on the first instruction
  • the receiving space parameter indicated by the information is determined, and the receiving space parameter includes a first antenna parameter of the second communication device.
  • the second communication device determines at least one power information of the first reference signal through a reception space parameter indicated by the first indication information. After the first communication device receives the at least one power information, it may determine a precoding matrix based on the at least one power information and uplink power information measured by the first communication device itself.
  • the role of the first indication information is to make the at least one power information reported by the second communication device have an association relationship with the uplink power information measured by the first communication device, so that the first communication device can eliminate the transmission of the uplink reference signal of the second communication device.
  • the effect of power makes the determined precoding matrix match the actual channel.
  • the acquiring, by the second communication device, the first indication information includes:
  • the second communication device sends the first instruction information, or the second communication device receives the first instruction information.
  • the second communication device sends the first instruction information, and notifies the first communication device of the reception space parameter on which the at least one power information is based, so that the first communication device can measure the uplink power information based on the transmission space parameter of the associated second communication device,
  • the at least one power information reported by the second communication device has an association relationship with the uplink power information measured by the first communication device, so that the first communication device can eliminate the influence of the transmission power of the uplink reference signal of the second communication device, so that The determined precoding matrix matches the actual channel.
  • the method is applicable to a case where the second communication device first measures the first reference signal and then sends an uplink reference signal.
  • the method may enable the second communication device to select a receiving space parameter corresponding to the power information with the best power information measurement quality (for example, the maximum power value), thereby improving the measurement accuracy of the at least one power information.
  • the receiving of the first instruction information by the second communication device is applicable to a case where the second communication device first sends an uplink reference signal and then measures the first reference signal.
  • the first communication device first measures the uplink reference signal, and selects all or part of the received spatial parameters corresponding to the uplink reference signal according to its own implementation algorithm to measure uplink power information.
  • the first communication device indicates the receiving space parameter corresponding to the uplink power information to the second communication device, so that at least one power information reported by the second communication device has an association relationship with the uplink power information measured by the first communication device, so that the first communication device
  • the communication device can eliminate the influence of the transmission power of the uplink reference signal of the second communication device, so that the determined precoding matrix matches the actual channel.
  • this method may enable the first communication device to select the uplink power information with the best power information measurement quality (for example, the maximum power value), and improve the measurement accuracy of the uplink power information.
  • it also includes:
  • the second communication device obtains configuration information of a second reference signal, where the second reference signal includes M ports, and different transmission space parameters of different ports among the M ports.
  • one way is to combine a reception space parameter for receiving the first reference signal and a transmission space parameter for transmitting the second reference signal. Associated.
  • the second communication device uses a plurality of different receiving space parameters to receive the first reference signal, the associated plurality of sending space parameters should also not be different.
  • it also includes:
  • the second communication device receives first configuration information, and the first configuration information is used to instruct the second communication device to send the at least one power information.
  • it also includes:
  • the second communication device sends second instruction information, where the second instruction information is used to indicate a receiver type of the second communication device.
  • the second communication device sends the receiver type to the first communication device, so that the first communication device can perform multiple iterations by itself, thereby preventing the second communication device from participating in the iteration, and reducing the computational complexity of the second communication device. , Avoid sending multiple uplink reference signals, thereby greatly increasing the speed of iteration, so that the performance gain of iterative optimization can be achieved.
  • it also includes:
  • the second communication device receives second configuration information, where the second configuration information is used to indicate the N.
  • the optimal power information calculation scheme can be selected according to the actual situation, so that the acquisition of the relative channel gain is more accurate.
  • the second communication device has 2 transmitting ports and 4 receiving ports, and does not support antenna selection. Then the calculation of the uplink power information by the first communication device can only be based on the uplink reference signals sent by the two sending ports. At this time, when the second communication device calculates the power information of the first reference signal, it should also perform calculation based on the two receiving ports associated with the two transmitting ports.
  • N may be configured as the number of all receiving ports, or N may be configured as the number of partial receiving ports.
  • a second aspect of the embodiments of the present application provides a communication method, which includes:
  • the first communication device acquires the first instruction information, the first communication device sends a first reference signal, and the first communication device receives at least one power information of the first reference signal, where the at least one power information is based on the first instruction
  • the receiving space parameter indicated by the information is determined, and the receiving space parameter includes a first antenna parameter of the second communication device.
  • the second communication device determines at least one power information of the first reference signal through a reception space parameter indicated by the first indication information. After the first communication device receives the at least one power information, it may determine a precoding matrix based on the at least one power information and uplink power information measured by the first communication device itself.
  • the role of the first indication information is to make the at least one power information reported by the second communication device have an association relationship with the uplink power information measured by the first communication device, so that the first communication device can eliminate the transmission of the uplink reference signal of the second communication device.
  • the effect of power makes the determined precoding matrix match the actual channel.
  • the acquiring, by the first communication device, first indication information includes:
  • the first communication device sends the first instruction information, or the first communication device receives the first instruction information.
  • Receiving the first instruction information by the first communication device may cause the first communication device to measure the uplink power information based on the transmission space parameters of the associated second communication device, so that at least one power information reported by the second communication device is related to the first communication device.
  • the measured uplink power information has an association relationship, so that the first communication device can eliminate the influence of the transmission power of the uplink reference signal of the second communication device, so that the determined precoding matrix matches the actual channel.
  • the method is applicable to a case where the second communication device first measures the first reference signal and then sends an uplink reference signal.
  • the method may enable the second communication device to select a receiving space parameter corresponding to the power information with the best power information measurement quality (for example, the maximum power value), thereby improving the measurement accuracy of the at least one power information.
  • the first communication device sends the first indication information, which is applicable to a case where the second communication device first sends an uplink reference signal and then measures the first reference signal.
  • the first communication device first measures the uplink reference signal, and selects all or part of the received spatial parameters corresponding to the uplink reference signal according to its own implementation algorithm to measure uplink power information.
  • the first communication device indicates the receiving space parameter corresponding to the uplink power information to the second communication device, so that at least one power information reported by the second communication device has an association relationship with the uplink power information measured by the first communication device, so that the first communication device
  • the communication device can eliminate the influence of the transmission power of the uplink reference signal of the second communication device, so that the determined precoding matrix matches the actual channel.
  • this method may enable the first communication device to select the uplink power information with the best power information measurement quality (for example, the maximum power value), and improve the measurement accuracy of the uplink power information.
  • it also includes:
  • the first communication device sends configuration information of a second reference signal, where the second reference signal includes M ports, and different ports in the M ports have different transmission space parameters.
  • one way is to combine a reception space parameter for receiving the first reference signal and a transmission space parameter for transmitting the second reference signal Associated.
  • the second communication device uses a plurality of different receiving space parameters to receive the first reference signal, the associated plurality of sending space parameters should also not be different.
  • it also includes:
  • the first communication device sends first configuration information, and the first configuration information is used to instruct the second communication device to send the at least one power information.
  • it also includes:
  • the first communication device receives second instruction information, and the second instruction information is used to indicate a receiver type of the second communication device.
  • the second communication device sends the receiver type to the first communication device, so that the first communication device can perform multiple iterations by itself, thereby preventing the second communication device from participating in the iteration, and reducing the computational complexity of the second communication device. , Avoid sending multiple uplink reference signals, thereby greatly increasing the speed of iteration, so that the performance gain of iterative optimization can be achieved.
  • it also includes:
  • the first communication device sends second configuration information, where the second configuration information is used to indicate the N.
  • the optimal power information calculation scheme can be selected according to the actual situation, so that the acquisition of the relative channel gain is more accurate.
  • the second communication device has 2 transmitting ports and 4 receiving ports, and does not support antenna selection. Then the calculation of the uplink power information by the first communication device can only be based on the uplink reference signals sent by the two sending ports. At this time, when the second communication device calculates the power information of the first reference signal, it should also perform calculation based on the two receiving ports associated with the two transmitting ports.
  • N may be configured as the number of all receiving ports, or N may be configured as the number of partial receiving ports.
  • the power information is a parameter determined according to a received power of a signal.
  • the power information may be RSRP, RSRQ, RSSI, or received amplitude information, and may also be determined by at least one of RSRP, RSRQ, RSSI, and received amplitude information.
  • the first antenna parameter includes antenna port information for the second communication device to measure the power information.
  • the receiving space parameter includes the first antenna parameter of the second communication device, so that the first indication information can indicate the antenna parameter on which the measurement of the at least one power information is based, such as antenna port information or antenna index information. Since different antenna ports / antennas correspond to different channels, by clearly indicating the information of the antenna ports, the above-mentioned association relationship can be made more accurate, and the obtained precoding matrix can be more accurate.
  • the receiving spatial parameters further include receiving spatial filtering parameters.
  • the received spatial parameters include the received spatial filtering parameters, the above-mentioned association relationship can be further more accurate, and the obtained precoding matrix can be more accurate.
  • the receiving spatial filtering parameter may be a spatial Rx parameter.
  • the first indication information indicates N receiving space parameters
  • the at least one power information is determined according to a receiving space parameter indicated by the first instruction information, and includes:
  • the at least one power information is determined according to the N receiving space parameters.
  • the transmission space parameter includes a second antenna parameter and / or a transmission space filter parameter
  • the second antenna parameter includes antenna port information that the second communication device sends the second reference signal.
  • the first indication information indicates N receiving space parameters, which may be information indicating a receiving port of the second communication device, or an associated reference signal.
  • the receiving port on which the measurement of the at least one power information is based can be specified. Then, when the first communication device measures the uplink power information, the transmission port of the second communication device on which it is based should be associated with the reception port. For example, the transmission port is the reception port, and the spatial filtering parameter of the transmission port is equal to the reception port. Spatial filtering parameters. In this way, the first communication device can accurately eliminate the influence of the uplink reference signal power, and make the precoding matrix match the real channel.
  • the reception space parameter on which the measurement of the at least one power information is based can also be clarified, where the received space parameter based on is associated with the transmission space parameter of the transmission port of the associated reference signal (E.g., equal).
  • the first communication device selects all or part of the transmission space parameters (for example, the sending port) to measure the uplink power information according to its own implementation algorithm.
  • the first communication device indicates the uplink power information to the second communication device, and then the second communication device obtains that the receiving space parameter that needs to be used when measuring the first reference signal should be associated with the indicated sending space parameter (for example, equal).
  • the first communication device Based on the at least one power information calculated and reported in this way and the uplink power information measured by the first communication device, the first communication device can be made to eliminate the influence of the transmission power of the uplink reference signal, thereby making the determined precoding matrix and the actual Channel matching.
  • the reference signal associated with the indication may be configuration information indicating at least one second reference signal resource, or may be configuration information indicating at least one second reference signal resource set.
  • the configuration index of at least one second reference signal resource may be indicated, or the configuration index of at least one second reference signal resource set may be indicated. With fewer bits, the required information can be indicated.
  • the second reference signal is an uplink reference signal sent by the second communication device.
  • the first indication information indicates an associated reference signal
  • the first indication information indicates N receiving space parameters, including:
  • the first indication information indicates configuration information of the second reference signal, and the N reception space parameters are associated with the transmission space parameters of the M ports;
  • the first information can accurately indicate which of the receiving space parameters the at least one power information is measured on, so that the first communication device acquires the measurement
  • the second reference signal power information needs to be based on a transmission space parameter, or the second communication device is required to obtain a reception space parameter based on which to measure at least one power information.
  • the first communication device measures the second reference signal of M> 1 transmission ports, determines that the channel quality of M1 ports is the best, and measures uplink power information based on the M1 ports. Then the channel quality corresponding to the reception space parameters associated with the transmission space parameters of the M1 ports may also be the best.
  • the first communication device may instruct the second communication device to obtain a more accurate based on the reception space parameters associated with the transmission space parameters of the M1 ports when measuring the power information of the first reference signal through the first instruction information. Measurement results.
  • the N receiving spatial parameters are associated with the transmitting spatial parameters of the M ports, and include:
  • the N reception space parameters are determined based on the transmission space parameters of all or part of the M ports, or the transmission space parameters of all or part of the M ports are determined based on the N reception space parameters. of.
  • the N receiving space parameters are associated with the sending space parameters of the M1 ports, including:
  • the N reception space parameters are determined based on the transmission space parameters of the M1 ports, or the transmission space parameters of the M1 ports are determined based on the N reception space parameters.
  • the N receiving space parameters are determined based on the sending space parameters of all or part of the M ports, and the N receiving space parameters are equal to the sending space parameters of all or part of the M ports. ;
  • the sending space parameters of all or part of the M ports are determined based on the N receiving space parameters, and the sending space parameters of all or part of the M ports are equal to the N receiving space parameters. Other similar reasons will not be repeated.
  • the first communication device can determine a precoding matrix based on the uplink power information measured by itself and at least one power information reported by the second communication device, thereby eliminating Influence of the transmission power of the uplink reference signal of the second communication device, so that the determined precoding matrix matches the actual channel.
  • the at least one power information is determined according to the N receiving space parameters, including:
  • the at least one power information is determined according to a maximum value of the power information of the first reference signal corresponding to the N received spatial parameters.
  • the determination of at least one power information by the maximum value of the power information of the first reference signal may enable the second communication device to select the power information with the best measurement quality of the power information (for example, the maximum power value is reported) and improve the measurement of the at least one power information
  • the accuracy helps to accurately eliminate the influence of the transmission power of the uplink reference signal of the second communication device, and makes the precoding matrix more accurate.
  • the at least one power information is determined according to the N receiving space parameters, including:
  • the at least one power information is determined according to an average value of power information of the first reference signal corresponding to the N received spatial parameters.
  • At least one power information is determined by an average value of the power information of the first reference signal, which can reduce the influence of interference and noise on the measurement accuracy and improve the measurement accuracy of the power information.
  • the at least one power information is determined according to the N receiving space parameters, including:
  • the at least one power information is determined according to the N receiving space parameters, including:
  • the at least one power information is determined according to a sum value of power information of the first reference signal corresponding to the N received spatial parameters.
  • the power information of the first reference signal is a weighted summation of power information on time-frequency resources occupied by the first reference signal in L time units, and L is a positive integer.
  • the first indication information is carried by at least one of RRC, MAC, CE, or DCI signaling.
  • the first configuration information includes the first indication information.
  • the first reference signal is CSI-RS or SSB
  • the second reference signal is SRS
  • a third aspect of the embodiments of the present application provides a communication device.
  • the communication device may be a second communication device, or may be capable of supporting the second communication device to perform a corresponding function performed by the second communication device in the design example of the first aspect.
  • a device for example, the device may be a device or a chip system in a second communication device, and the device may include a receiving module, a processing module, and a sending module, and these modules may execute the second communication device in the design example of the first aspect.
  • the corresponding function specifically:
  • a processing module configured to obtain the first instruction information.
  • the receiving module is configured to receive a first reference signal.
  • a sending module configured to send at least one power information of the first reference signal, the at least one power information is determined according to a receiving space parameter indicated by the first instruction information, and the receiving space parameter includes the second The first antenna parameter of the communication device.
  • an indication method of the first indication information refer to the specific description in the first aspect, which is not specifically limited herein.
  • a fourth aspect of the embodiments of the present application provides a communication device.
  • the communication device may be a first communication device, or may be capable of supporting the first communication device to perform a corresponding function performed by the first communication device in the design example of the second aspect.
  • the device for example, the device may be a device or a chip system in a first communication device, and the device may include a sending module, a processing module, and a receiving module, and these modules may execute the first communication device in the design example of the second aspect.
  • the corresponding function specifically:
  • a processing module configured to obtain the first instruction information.
  • a sending module configured to send a first reference signal.
  • a receiving module configured to receive at least one power information of the first reference signal, where the at least one power information is determined according to a receiving space parameter indicated by the first instruction information, where the receiving space parameter includes the second The first antenna parameter of the communication device.
  • an indication method of the first indication information refer to the specific description in the second aspect, which is not specifically limited herein.
  • a fifth aspect of the embodiments of the present application provides a communication device, where the communication device includes a processor, and is configured to implement a function of the second communication device in the method described in the first aspect.
  • the communication device may further include a memory for storing program instructions and data.
  • the memory is coupled to the processor, and the processor may call and execute program instructions stored in the memory to implement the function of the second communication device in the method described in the first aspect.
  • the second communication device may further include a communication interface, where the communication interface is used for the second communication device to communicate with other devices.
  • the other device is a first communication device.
  • the second communication device includes:
  • Memory for storing program instructions
  • a processor configured to obtain first indication information, receive a first reference signal, and send at least one power information of the first reference signal, where the at least one power information is a receiving space indicated according to the first indication information
  • the parameter is determined, and the receiving space parameter includes a first antenna parameter of the second communication device.
  • an indication method of the first indication information refer to the specific description in the first aspect, which is not specifically limited herein.
  • a sixth aspect of the embodiments of the present application provides a communication device, where the communication device includes a processor, and is configured to implement a function of the first communication device in the method described in the second aspect.
  • the communication device may further include a memory for storing program instructions and data.
  • the memory is coupled to the processor, and the processor may call and execute program instructions stored in the memory to implement functions of the first communication device in the method described in the second aspect.
  • the first communication device may further include a communication interface, where the communication interface is used for the first communication device to communicate with other devices. Exemplarily, the other device is a second communication device.
  • the first communication device includes:
  • Memory for storing program instructions
  • a processor configured to obtain first indication information, send a first reference signal, and receive at least one power information of the first reference signal, where the at least one power information is a receiving space indicated according to the first indication information
  • the parameter is determined, and the receiving space parameter includes a first antenna parameter of the second communication device.
  • an indication method of the first indication information refer to the specific description in the second aspect, which is not specifically limited herein.
  • a seventh aspect of the embodiments of the present application provides a chip system.
  • the chip system includes a processor, may further include a memory, and may further include a communication interface, which is configured to implement a function of the first communication device or the second communication device in the foregoing method.
  • the chip system can be composed of chips, and can also include chips and other discrete devices.
  • An eighth aspect of the embodiments of the present application provides a computer program product, where the computer program product includes computer program code, and when the computer program code is executed by a computer, causes the computer to execute the method according to the first aspect, or The computer is caused to perform the method described in the second aspect.
  • a ninth aspect of the embodiments of the present application provides a computer-readable storage medium, where the computer storage medium stores computer instructions, and when the computer instructions are executed by a computer, the computer is caused to execute the foregoing first aspect or the second aspect. The method described.
  • a tenth aspect of the embodiments of the present application provides a system including the communication device according to the third aspect and the communication device according to the fourth aspect; or the system includes the communication device according to the fifth aspect and a sixth device. Aspect of the communication device.
  • Figure 1 shows an example process performed by a joint iterative optimization method in a TDD system
  • FIG. 2 is an exemplary system architecture diagram of a communication method according to an embodiment of the present application.
  • FIG. 3 is a schematic flowchart of interaction of a communication method according to an embodiment of the present application.
  • FIG. 4 is a module structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 5 is a module structural diagram of another communication device according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a device 600 according to an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a device 700 according to an embodiment of the present application.
  • At least one means one or more, and “multiple” means two or more.
  • “And / or” describes the association relationship between related objects, and indicates that there can be three kinds of relationships. For example, A and / or B can indicate: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural. The character “/” generally indicates that the related objects are an "or” relationship. "At least one or more of the following” or similar expressions refers to any combination of these items, including any combination of single or plural items.
  • At least one (a) of a, b, or c can be expressed as: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple .
  • the design of the precoding matrix P used by the transmitting end and the receiver matrix G used by the receiving end has an important impact on system performance.
  • the optimization of the precoding matrix P is an important issue in a MIMO system.
  • FIG. 1 shows an example process performed by the method in a TDD system. As shown in Figure 1, assuming that the number of transmitting antennas and receiving antennas of each terminal device are the same, the process of joint and iterative optimization of P and G is:
  • the network device obtains a downlink channel matrix Hk of the kth terminal device by measuring sounding reference signals (SRS) of the K terminal devices.
  • SRS sounding reference signals
  • H k is a matrix of N rk rows and N t columns
  • N rk represents the number of antenna ports (also the number of antenna ports that receive downlink signals) of the k-th terminal device that sends SRS
  • N t represents the antenna port of the network device number.
  • P k represents the initial precoding matrix determined by the network device for the k-th terminal device
  • L represents the total number of data layers scheduled by the network device, satisfying l k represents the number of data layers scheduled by the network device for the k-th terminal device.
  • P can be obtained using the design principle of Zero Forcing (ZF).
  • the network device uses Pk as a precoding matrix, and sends a precoded channel state information reference signal (CSI-RS) to the k-th terminal device.
  • CSI-RS channel state information reference signal
  • the k-th terminal device measures the equivalent channel H k * P k to determine the initial receiver matrix.
  • the k-th terminal device uses G k to pre-encode the SRS, and sends the pre-encoded SRS, so that the network device obtains the equivalent channel G k * H k . Then, the network device determines this based on the equivalent channels of the K terminal devices.
  • the precoding matrix P [P 1 ... .P K ].
  • MMSE Minimum Mean Square Error
  • a network device can determine the precoding matrix based on the MMSE principle by the following formula (1):
  • () H represents the conjugate transpose of the matrix, It indicates the transmission power of the network device when it performs data scheduling in the future.
  • G diag ⁇ G 1 , ..., G K ⁇ is a block diagonal matrix composed of G 1 , ..., G K with dimensions of L rows
  • W is a matrix of L rows and L columns. For example, W can be determined according to the priority of each terminal device.
  • ⁇ and ⁇ are real numbers
  • I m is a unit matrix with dimensions m * m.
  • step S105 the network device obtained according to step S104, P is a pre-coding matrix P k, the k-th terminal device transmits the precoded CSI-RS.
  • the k-th terminal device measures the equivalent channel H k * P k to determine the receiver matrix G k at this time.
  • steps S104-S106 are an iterative process. Based on this, steps S104-S106 can be performed iteratively several times. During the iteration, the precoding matrix P of the network equipment and the receiver matrix G k of each terminal equipment are continuously updated. When the iteration converges, the obtained P and G k can match each other better, improving system performance.
  • the network device when determining the precoding matrix P, the network device needs to determine the channel matrix H k (or G k H k ) of each terminal device.
  • H k is determined based on the SRS measurement channel sent by each terminal device.
  • the measurement result includes the effect of the SRS transmit power, that is, the measurement result is (or ). among them, It is the transmission power of the SRS of the terminal device k. Due to non-ideal factors such as devices, network equipment cannot know the actual SRS transmit power, and therefore cannot be removed from the measurement The impact of (or ). That is, the network device cannot obtain the relative relationship between the channel gains of different terminal devices. Therefore, the MMSE precoding matrix obtained by the network device based on the above formula (1) cannot match the actual channel, which seriously reduces the performance of the system.
  • H k or related information (such as the feature vector or correlation matrix of H k ) is reported by each terminal device to the network device.
  • the terminal equipment will normalize Hk or related information, so the network equipment cannot obtain the relative channel gain of different terminal equipment. Therefore, the MMSE precoding matrix obtained by the network device based on the above formula (1) cannot match the actual channel, which seriously reduces system performance.
  • the power information described in the embodiment of the present application is a parameter determined according to a received power of a signal.
  • the power information of the reference signal may be an average value of the received power of the reference signal on the occupied time-frequency resources, or a parameter determined according to the received power of the reference signal and other information.
  • RSRP Reference Signal Received Power
  • RSRQ Reference Signal Received Quality
  • RSSI Received Signal Strength Indicator
  • the power information of the signal may also be defined as the received amplitude information of the signal, or may be determined according to one or more of them, which is not specifically limited in the embodiment of the present application. Since the power can be determined based on the amplitude and vice versa, the two can be considered equivalent.
  • RSRP is the average value of the power of the reference signal received on all time-frequency resources carrying the reference signal
  • RSSI is the average of the power of all signals (including pilot signals, interference signals, noise signals, etc.) carried in a certain symbol.
  • RSRQ is determined based on RSRP and RSSI.
  • the antenna port information described in the embodiment of the present application may be the number of antennas, the number of antenna ports, the index of the antenna, the index of the antenna port, or the index of the antenna port group. limit.
  • An antenna port group is composed of at least one antenna port.
  • One definition method is that one antenna port group corresponds to all antennas or all antenna ports on one antenna panel of a terminal device.
  • an antenna port group consists of antennas or antenna ports that the terminal device can send signals (such as SRS) at the same time.
  • Another definition is that an antenna port group is composed of antennas or antenna ports that a terminal device can send signals (such as SRS).
  • Another way to define it is that an antenna port group consists of antennas or antenna ports that the terminal device can receive signals at the same time.
  • the antenna port group may also have other definition manners, which are not limited in the embodiment of the present application.
  • An antenna port may correspond to one physical antenna, or may be formed by weighting multiple physical antennas, or may have other forms. This embodiment of the present application does not specifically limit this.
  • the receiving spatial filtering parameter refers to a weighting parameter used by the terminal device to form a beam when receiving beamforming.
  • the weighting parameter is often related to the related information of the DOA of the downlink channel on the terminal device side.
  • the terminal device can virtualize multiple physical antennas into one receiving antenna port through multiple antennas and corresponding weighting parameters. Matching the receive spatial filtering parameters of the channel can improve the receive power of the downlink signal.
  • the transmission spatial filtering parameter refers to a weighting parameter used by the terminal device to form a beam when transmitting beamforming.
  • the weighting parameter is often related to the related information of the wave departure angle of the uplink channel on the terminal device side.
  • the terminal device can virtualize multiple physical antennas into one transmit antenna port through multiple antennas and corresponding weighting parameters. Matching the transmission space filtering parameters of the channel can improve the power of network equipment to receive uplink signals.
  • the sending spatial filtering parameters by receiving the spatial filtering parameters, and vice versa.
  • the optimal receiving spatial filtering parameter and the optimal transmitting spatial filtering parameter are the same. Therefore, one of the parameters can be determined to determine the other parameter.
  • FIG. 2 is an exemplary system architecture diagram of a communication method according to an embodiment of the present application. As shown in FIG. 2, the method involves communication between a terminal device and a network device.
  • the terminal device may be a device that provides voice and / or data connectivity to the user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem.
  • a terminal device can communicate with one or more core networks via a radio access network (RAN).
  • the terminal device can be a mobile terminal device, such as a mobile phone (or a "cellular" phone) and a mobile terminal device.
  • the computer for example, may be a portable, pocket-sized, handheld, computer-built or vehicle-mounted mobile device that exchanges language and / or data with a wireless access network.
  • PCS personal communication service
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistants
  • computing devices or other processing devices connected to wireless modems in-vehicle devices, wearable devices, terminals in future 5G networks, or public land mobile networks that have evolved in the future (public land mobile network) , PLMN), etc.
  • this embodiment of the present application is not limited to this.
  • the terminal device can also be called a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, Remote terminal equipment (remote terminal), access terminal equipment (access terminal), user terminal equipment (user terminal), user agent (user agent), user equipment (user device), or user equipment (user equipment).
  • Remote terminal equipment remote terminal equipment
  • access terminal equipment access terminal
  • user terminal equipment user terminal
  • user agent user agent
  • user equipment user device
  • user equipment user equipment
  • the network device may be a base station.
  • a base station may be a device that is deployed in a wireless access network and is capable of wireless communication with a terminal device.
  • the base station can be used to convert the received air frames and IP packets to each other as a router between the terminal device and the rest of the access network, where the rest of the access network can include an Internet Protocol (IP) network; the base station can also Coordinate the management of air interface attributes.
  • IP Internet Protocol
  • the base station can be a Global System for Mobile Communication (GSM) or a code division multiple access (CDMA) base station (Base Transceiver Station (BTS)), or it can be a Broadband Code Division Multiple Access
  • GSM Global System for Mobile Communication
  • CDMA code division multiple access
  • BTS Base Transceiver Station
  • NodeB in (wideband code multiple access, WCDMA) may also be an evolved base station (eNB or e-NodeB, evolutional NodeB) in LTE, or gNB in NR, etc.
  • eNB evolved base station
  • e-NodeB evolutional NodeB
  • the base station can also be a wireless controller in a cloud radio access network (CRAN) scenario, or it can be a relay station, access point, in-vehicle device, wearable device, and network device in a 5G network or future evolution
  • CRAN cloud radio access network
  • the network devices and the like in the PLMN network are not limited in the embodiments of the present application.
  • the base station may be a macro base station or a micro base station.
  • the method involved in this application is applicable to scenarios of homogeneous networks and heterogeneous networks. At the same time, there are no restrictions on transmission points. For example, it can support multi-point coordinated transmission between macro base stations and macro base stations, micro base stations and micro base stations, and macro base stations and micro base stations.
  • the method involved in this application can be used in a frequency division duplex (FDD) system, and can also be used in a TDD system.
  • FDD frequency division duplex
  • TDD time division duplex
  • the method involved in this application is also applicable to low-frequency scenes (below 6GHz) and high-frequency scenes (above 6GHz).
  • first communication device described in the following embodiments of the present application may be the network device illustrated in FIG. 2 described above, and the second communication device described in the following embodiments may be terminal devices illustrated in FIG. 2 described above.
  • the embodiments of the present application are not limited thereto.
  • FIG. 3 is a schematic diagram of an interaction process of a communication method according to an embodiment of the present application. As shown in FIG. 3, the interaction process involved in the method is:
  • the first communication device sends a first reference signal to the second communication device.
  • the network device may send a first reference signal to the terminal device for the terminal device to measure the power information of the first reference signal.
  • the first reference signal may be a CSI-RS.
  • the first reference signal may be a synchronization signal (SS) or a synchronization signal block (SS).
  • SS synchronization signal
  • SS synchronization signal block
  • the first reference signal may be a demodulation reference signal (DMRS).
  • DMRS demodulation reference signal
  • the second communication device determines at least one power information of the first reference signal according to a receiving space parameter indicated by the first instruction information.
  • the receiving space parameter includes a first antenna parameter of the second communication device.
  • the receiving space parameter includes the first antenna parameter of the second communication device, so that the first indication information can indicate the antenna parameter on which the measurement of the at least one power information is based, such as antenna port information or antenna index information. Since different antenna ports / antennas correspond to different channels, by clearly indicating the information of the antenna ports, the above-mentioned association relationship can be made more accurate, and the obtained precoding matrix can be more accurate.
  • the first antenna parameter includes antenna port information for the second communication device to measure the power information.
  • antenna port information for the second communication device to measure the power information.
  • the first antenna parameter may include an antenna port index or an antenna index of the second communication device for measuring the power information.
  • the above-mentioned receiving spatial parameters further include receiving spatial filtering parameters.
  • the received spatial parameters include the received spatial filtering parameters, the above-mentioned association relationship can be further more accurate, and the obtained precoding matrix can be more accurate.
  • the above-mentioned receiving spatial filtering parameters may be called spatial Rx paramters, and the spatial Rx paramters include weighting parameters of the antenna.
  • the second communication device may send a second reference signal to the first communication device for the first communication device to measure the power of the uplink reference signal.
  • the second reference signal may be SRS or DMRS.
  • the first reference signal is a CSI-RS and the second reference signal is an SRS for example, but the embodiments of the present application are not limited thereto.
  • the spatial information of the antenna port of the second communication device transmitting the SRS and the spatial parameter of the antenna port receiving the CSI-RS may be made by using the indication information.
  • the second communication device sends at least one power information of the first reference signal to the first communication device.
  • the first communication device determines a precoding matrix based on at least one power information of the first reference signal.
  • the process of determining the precoding matrix by the first communication device is described below by using an example.
  • the second communication device includes multiple antenna ports, and the multiple antenna ports are used for both transmitting and receiving signals, then:
  • the second communication device sends the SRS through one of the antenna ports A. Accordingly, the first communication device can receive the SRS using one antenna port B, and the first communication device uses the fth time-frequency resource occupied by the SRS.
  • the measured received signal is:
  • E srs is the power of the second communication device to send SRS
  • h f is the uplink channel coefficient of the second communication device's sending port A to the first communication device's receiving port B, which is a complex number
  • s is the SRS symbol.
  • the device and the second communication device have known the value of the parameter in advance, and n is interference and / or noise.
  • the first communication device performs channel estimation to obtain an uplink channel estimation result on the f-th time-frequency resource. Furthermore, the first communication device calculates the uplink power information X UL corresponding to the antenna port A of the second communication device by the following formula (3):
  • F is the total number of time-frequency resources occupied by the SRS. Represents the average of
  • the first communication device transmits a CSI-RS through the above-mentioned port B.
  • the second communication device receives the CSI-RS through a plurality of receiving ports.
  • the second communication device obtains the received signal on the f-th time-frequency resource occupied by the CSI-RS:
  • E csi-rs is the power of the CSI-RS transmitted by the first communication device
  • h f is the downlink channel coefficient of the transmission port B of the first communication device to the reception port C of the second communication device
  • x is the CSI-RS symbol
  • the first communication device and the second communication device already know the value of the parameter in advance
  • n ′ is interference and / or noise.
  • the second communication device performs channel estimation to obtain a downlink channel estimation result on the f-th time-frequency resource. Furthermore, the second communication device calculates the downlink power information X DL corresponding to the antenna port A of the first communication device by the following formula (5):
  • F ' is the total number of REs occupied by the CSI-RS.
  • the second communication device sends the X DL to the first communication device, and the first communication device can obtain:
  • the first communication device can obtain the ratio of E tx to E srs by formula (7):
  • E tx of the data transmitted by the first communication device is equal to the power E csi-rs of the CSI-RS, or has a known ratio relationship, E tx / E srs can be calculated according to (7).
  • H is a channel matrix of the second communication device.
  • the key to get formula (7) is to satisfy or A prerequisite for satisfying this equation or inequality is that the transmitting port A and the receiving port C of the second communication device are mutually associated ports, for example, corresponding to the same physical antenna. If port A and port C are virtualized by multiple physical antennas, the reception filtering parameters of port A and the transmission filtering parameters of port C are also the same. Because the channels of different ports are different, it is difficult to guarantee without the constraints associated with port A and port C It is not possible to obtain accurate E tx / E srs .
  • the first communication device needs to ensure that the transmission port of the second communication device corresponding to the X UL calculated by itself and the reception port corresponding to the X DL fed back by the second communication device are associated. Therefore, the receiving port corresponding to the feedback X DL needs to be indicated by the first instruction information to ensure the above constraint.
  • the second communication device determines at least one power information of the first reference signal by using a receiving space parameter indicated by the first instruction information. After the first communication device receives the at least one power information, it may determine a precoding matrix based on the at least one power information and uplink power information measured by the first communication device itself.
  • the role of the first indication information is to make the at least one power information reported by the second communication device have an association relationship with the uplink power information measured by the first communication device, so that the first communication device can eliminate the transmission of the uplink reference signal of the second communication device.
  • the effect of power makes the determined precoding matrix match the actual channel.
  • the first communication device may first obtain the first instruction information, and the second communication device may also first obtain the first instruction information.
  • the sequence of obtaining the first instruction information and sending the first reference signal by the first communication device is not specifically limited, and the first communication device may obtain the first instruction information before sending The first reference signal may also be sent first, and then the first indication information is obtained.
  • the order in which the second communication device obtains the first indication information and receives the first reference signal is not specifically limited, and the second communication device may obtain the first indication information before receiving the first reference. Signal, it may also receive the first reference signal first, and then obtain the first indication information.
  • the manner in which the first communication device and the second communication device obtain the first instruction information may be any one of the following.
  • the first communication device sends the first instruction information to the second communication device, and the second communication device receives the first instruction information.
  • the first communication device first determines the first instruction information, that is, obtains the first instruction information, and further, the first communication device sends the first instruction information to the second communication device.
  • the first communication device determines the first antenna parameter, obtains first instruction information for indicating the first antenna parameter, and sends the first instruction information to the second communication device. After receiving the first instruction information, the second communication device can obtain the first antenna parameter.
  • the receiving of the first instruction information by the second communication device is applicable to a case where the second communication device first sends an uplink reference signal and then measures the first reference signal.
  • the first communication device first measures the uplink reference signal, and selects all or part of the received spatial parameters corresponding to the uplink reference signal according to its own implementation algorithm to measure uplink power information.
  • the first communication device indicates the receiving space parameter corresponding to the uplink power information to the second communication device, so that at least one power information reported by the second communication device has an association relationship with the uplink power information measured by the first communication device, so that the first communication device
  • the communication device can eliminate the influence of the transmission power of the uplink reference signal of the second communication device, so that the determined precoding matrix matches the actual channel.
  • this method may enable the first communication device to select the uplink power information with the best power information measurement quality (for example, the maximum power value), and improve the measurement accuracy of the uplink power information.
  • the second communication device sends the first instruction information to the first communication device, and the second communication device receives the first instruction information.
  • the second communication device first determines the first instruction information, that is, obtains the first instruction information, and further, the second communication device sends the first instruction information to the first communication device.
  • the second communication device determines the first antenna parameter, obtains the first instruction information used to indicate the first antenna parameter, and sends the first instruction information to the first communication device. After receiving the first instruction information, the first communication device may obtain the first antenna parameter.
  • the second communication device sends the first instruction information, and notifies the first communication device of the reception space parameter on which the at least one power information is based, so that the first communication device can measure the uplink power information based on the transmission space parameter of the associated second communication device,
  • the at least one power information reported by the second communication device has an association relationship with the uplink power information measured by the first communication device, so that the first communication device can eliminate the influence of the transmission power of the uplink reference signal of the second communication device, so that The determined precoding matrix matches the actual channel.
  • the method is applicable to a case where the second communication device first measures the first reference signal and then sends an uplink reference signal.
  • the method may enable the second communication device to select a receiving space parameter corresponding to the power information with the best power information measurement quality (for example, the maximum power value), thereby improving the measurement accuracy of the at least one power information.
  • the following describes the process of instructing the receiving space parameter by using the first instruction information.
  • the first indication information may indicate N receiving space parameters, where N is an integer greater than zero.
  • the N may be a fixed value or a pre-configured value.
  • the first communication device may send the second configuration information to the second communication device, where the second configuration information is used to indicate the aforementioned N.
  • the optimal power information calculation scheme can be selected according to the actual situation, so that the acquisition of the relative channel gain is more accurate.
  • the second communication device has 2 transmitting ports and 4 receiving ports, and does not support antenna selection. Then the calculation of the uplink power information by the first communication device can only be based on the uplink reference signals sent by the two sending ports. At this time, when the second communication device calculates the power information of the first reference signal, it should also perform calculation based on the two receiving ports associated with the two transmitting ports.
  • N may be configured as the number of all receiving ports, or N may be configured as the number of partial receiving ports.
  • the above-mentioned second configuration information may be through radio resource control (RRC) signaling, media access control (MAC, CE) signaling, or downlink control information (DCI). At least one of the signaling is carried.
  • RRC radio resource control
  • MAC media access control
  • DCI downlink control information
  • the at least one power information is determined according to the N receiving space parameters.
  • the manner in which the first indication information indicates N receiving space parameters may be receiving port information (such as a receiving port index or a receiving port number) of the second communication device, where different receiving The receiving space parameters of the ports are different.
  • the manner in which the first indication information indicates N receiving spatial parameters may be configuration information indicating an associated second reference signal, where a port on which the second communication device sends the second reference signal
  • the transmission space parameters are associated with the N reception space parameters.
  • the receiving port on which the measurement of the at least one power information is based can be specified. Then, when the first communication device measures the uplink power information, the transmission port of the second communication device on which it is based should be associated with the reception port. For example, the transmission port is the reception port, and the spatial filtering parameter of the transmission port is equal to the reception port. Spatial filtering parameters. In this way, the first communication device can accurately eliminate the influence of the uplink reference signal power, and make the precoding matrix match the real channel.
  • the reception space parameter on which the measurement of the at least one power information is based can also be clarified, where the received space parameter based on is associated with the transmission space parameter of the transmission port of the associated reference signal (E.g., equal).
  • the first communication device selects all or part of the transmission space parameters (for example, the sending port) to measure the uplink power information according to its own implementation algorithm.
  • the first communication device indicates the uplink power information to the second communication device, and then the second communication device obtains that the receiving space parameter that needs to be used when measuring the first reference signal should be associated with the indicated sending space parameter (for example, equal).
  • the first communication device Based on the at least one power information calculated and reported in this way and the uplink power information measured by the first communication device, the first communication device can be made to eliminate the influence of the transmission power of the uplink reference signal, thereby making the determined precoding matrix and the actual Channel matching.
  • the configuration information of the second reference signal may include: the number of ports of the second reference signal, time-frequency resources occupied by the second reference signal, and the like.
  • the transmission space parameters of different ports are different.
  • the transmission space parameter may include a second antenna parameter and / or a transmission space filtering parameter.
  • the second antenna parameter includes antenna port information that the second communication device sends the second reference signal.
  • the configuration information of the second reference signal may configure an antenna port index for the second communication device to send the second reference signal.
  • the second communication device may first obtain configuration information of the second reference signal.
  • the configuration information of the second reference signal may be indicated by the first communication device to the second communication device.
  • the first indication information indicating the associated second reference signal may be configuration information indicating at least one second reference signal resource, and then all of the N received spatial parameters and the at least one second reference signal resource The transmission space parameters of the M ports among the ports are associated; or, the foregoing first indication information indicates that the associated second reference signal is configuration information indicating at least one second reference signal resource set, where each resource set includes One or more resources, the N received spatial parameters are associated with the transmitted spatial parameters of M ports among all the ports of the second reference signal resource included in the at least one second reference signal resource set. That is, the M ports may be one port of a second reference signal resource, or may be a port of a different second reference signal resource.
  • the configuration index of at least one second reference signal resource may be indicated, or the configuration index of at least one second reference signal resource set may be indicated. With fewer bits, the required information can be indicated.
  • the second reference signal is an uplink reference signal sent by the second communication device.
  • the receiving space parameters may be implemented in any of the following two ways:
  • the first indication information may indicate configuration information of the second reference signal, for example, a configuration index is indicated, and the N received spatial parameters are associated with the transmitted spatial parameters of the M ports.
  • the association of the N receiving space parameters with the sending space parameters of the M ports may mean that the N receiving space parameters are determined by sending space parameters of all or part of the M ports, or that all or The sending space parameters of some ports are determined by N receiving space parameters.
  • the N receiving space parameters are determined based on the sending space parameters of M1 ports among the M ports, where M1 is less than or equal to M.
  • the transmission space parameters of the M1 ports among the M ports are determined based on the N reception space parameters.
  • the configuration information of the second reference signal is indicated by the first indication information, that is, the transmission space parameters in the M ports can be indicated, and then the association relationship between the transmission space parameters of the M ports and the N reception space parameters can be indicated. Get N receiving space parameters.
  • the at least one power information is defined as an average value of the first reference signal power measured by all the receiving ports indicated.
  • the indication information indicates configuration information (such as a resource configuration index) of the SRS resource.
  • the second communication device may measure the power information of the first reference signal according to the N received spatial parameters. For example, if the N receiving space parameters include N port indexes, the second communication device may perform measurement on the ports corresponding to the N port indexes or a part of the N indexes. If the N receiving space parameters include the number of ports with a value of N, the second communication device may determine the power of the first reference signal from the corresponding number of ports from the ports sending the second reference signal according to a predefined rule. measuring.
  • the manner in which the first indication information indicates N receiving space parameters may be indicating M1 ports among M ports of the associated second reference signal, and the N receiving space parameters and the M1 ports
  • the transmission space parameters of X are associated, where M1 is an integer greater than or equal to 1 and less than or equal to M.
  • Indicating the associated second reference signal may be implemented by indicating at least one second reference signal resource, or may be implemented by indicating at least one second reference signal resource set, and details are not described again.
  • the above-mentioned N receiving space parameters are associated with the sending space parameters of the M1 ports, which may mean that the N receiving space parameters are determined by the sending space parameters of the M1 ports, or the sending space parameters of the M1 ports are received by the N receptions. Space parameters to determine.
  • the N receiving space parameters are determined based on the sending space parameters of the M1 ports.
  • the sending space parameters of the M1 ports are determined based on the N receiving space parameters.
  • M1 ports of the M ports are indicated by the first instruction information, that is, the sending space parameters of each port in the M1 ports can be indicated, and then the receiving space parameters of the M1 ports and the N receiving spaces can be indicated.
  • the association relationship of the parameters obtains N receiving space parameters.
  • the definition of the at least one power information is at least one receiving port.
  • the maximum value of the first reference signal power information measured by each receiving port.
  • the first communication device sends a CSI-RS
  • the second communication device measures the first reference signal power information corresponding to each receiving port through two ports, and reports the maximum reference signal power information.
  • the first communication device can determine, through the receiving port index indicated by the first instruction information and a predetermined corresponding rule, which port should be used to measure the uplink power information among the two ports sending the SRS.
  • the second communication device may measure the power information of the first reference signal according to the N received spatial parameters. For example, if the N receiving space parameters include N port indexes, the second communication device may perform measurement on the ports corresponding to the N port indexes or a part of the N indexes. If the N receiving space parameters include the number of ports with a value of N, the second communication device may determine the power of the first reference signal from the corresponding number of ports from the ports sending the second reference signal according to a predefined rule. measuring.
  • the first information can accurately indicate which of the receiving space parameters the at least one power information is measured on, so that the first communication device acquires the measurement
  • the second reference signal power information needs to be based on a transmission space parameter, or the second communication device is required to obtain a reception space parameter based on which to measure at least one power information.
  • the first communication device measures the second reference signal of M> 1 transmission ports, determines that the channel quality of M1 ports is the best, and measures uplink power information based on the M1 ports. Then the channel quality corresponding to the reception space parameters associated with the transmission space parameters of the M1 ports may also be the best.
  • the first communication device may instruct the second communication device to obtain a more accurate based on the reception space parameters associated with the transmission space parameters of the M1 ports when measuring the power information of the first reference signal through the first instruction information. Measurement results.
  • the N receiving space parameters are determined based on the sending space parameters of all or part of the M ports, and the N receiving space parameters are equal to the sending space parameters of all or part of the M ports. ;
  • the sending space parameters of all or part of the M ports are determined based on the N receiving space parameters, and the sending space parameters of all or part of the M ports are equal to the N receiving space parameters. Other similar reasons will not be repeated.
  • the first communication device can determine a precoding matrix based on the uplink power information measured by itself and at least one power information reported by the second communication device, thereby eliminating Influence of the transmission power of the uplink reference signal of the second communication device, so that the determined precoding matrix matches the actual channel.
  • the relationship between the N and the M may be any one of the following, and this application does not specifically limit this.
  • the order in which the second communication device receives the first reference signal and sends the second reference signal is not specifically limited.
  • the order in which the first communication device sends the first reference signal and receives the second reference signal is not specifically limited.
  • the second communication device has two transmitting antenna ports and two receiving antenna ports.
  • the definition of the at least one power information is at least one.
  • the maximum value of the first reference signal power information measured by each receiving port in the receiving port.
  • the first communication device sends a CSI-RS
  • the second communication device measures the first reference signal power information corresponding to each receiving port through two ports, and reports the maximum reference signal power information.
  • the first communication device can determine, through the receiving port index indicated by the first instruction information and the predetermined corresponding rule, which port should be used to measure the uplink power information among the two ports sending the SRS.
  • the first indication information may also indicate the receiving port index by indicating the port index of the SRS. N ⁇ M.
  • the power information measured by the second communication device may be measured based on the four ports, or may be measured based on two of the ports (for example, two ports used for the most recent SRS transmission from the current power information report).
  • N M or N ⁇ M may be used.
  • the at least one power information when the at least one power information is determined according to the N received spatial parameters, it may be implemented in any one of the following manners or a combination thereof.
  • the at least one power information is determined according to a maximum power information of the first reference signal corresponding to the N received spatial parameters.
  • the second communication device measures the power information of the first reference signal corresponding to each of the received spatial parameters according to the N received spatial parameters indicated by the first instruction information, and selects the maximum value to determine the at least one power information.
  • the second communication device may use the obtained maximum value as the at least one power information, or the second communication device may perform other calculations on the maximum value and use the calculation result as the at least one power information.
  • the foregoing other calculation of the maximum value may be a weighted calculation, such as calculating a product of the maximum value and a first preset factor.
  • the second communication device measures N power information according to the N reception space parameters indicated by the first instruction information
  • the maximum value of the N power information may be used as the at least one power information.
  • the determination of at least one power information by the maximum value of the power information of the first reference signal may enable the second communication device to select the power information with the best measurement quality of the power information (for example, the maximum power value is reported) and improve the measurement of the at least one power information
  • the accuracy helps to accurately eliminate the influence of the transmission power of the uplink reference signal of the second communication device, and makes the precoding matrix more accurate.
  • the at least one power information is determined according to an average value of the power information of the first reference signal corresponding to the N received spatial parameters.
  • the second communication device determines an average value of the power information of the first reference signal corresponding to each reception space parameter according to the N reception space parameters indicated by the first instruction information, and determines at least one of the foregoing according to the average value. Power information.
  • the above-mentioned determination of the average value of the power information may be a weighted average in the dB domain of the power information, or a linear domain weighted average of the power information, which is not specifically described in the embodiment of the present application. limit.
  • the second communication device may use the obtained average value as the at least one power information, or the second communication device may also perform other calculations on the average value, and use the calculation result as the at least one power information.
  • the foregoing other calculation of the average value may be a weighted calculation, such as calculating a product of the average value and a second preset factor.
  • the average value of the N power information may be used as the at least one power information.
  • At least one power information is determined by an average value of the power information of the first reference signal, which can reduce the influence of interference and noise on the measurement accuracy and improve the measurement accuracy of the power information.
  • the uplink power parameter can also be measured based on the average value. In this way, it helps to more accurately eliminate the influence of the transmission power of the uplink reference signal of the second communication device, and makes the precoding matrix more accurate.
  • the at least one power information is determined according to a summation value of the power information of the first reference signal corresponding to the N received spatial parameters.
  • the second communication device measures the power information of the first reference signal according to the N receiving space parameters indicated by the first instruction information, and the second communication device may determine a sum value of the power information, and according to the request, The sum value determines at least one of the above power information.
  • the second communication device may use the obtained summation value as the at least one power information, or the second communication device may also perform weighted calculation on the summation value, and use the calculation result as the at least one power value. information.
  • the second communication device measures N pieces of power information according to the N reception space parameters indicated by the first indication information
  • the sum of the N pieces of power information may be used as the at least one piece of power information.
  • each of the N receiving space parameters corresponding to each of the N receiving space parameters may first be calculated by formula (4) -formula (5).
  • the downlink power information X DL of each of the receiving ports is calculated based on the downlink power information X DL of the multiple receiving ports corresponding to the N receiving space parameters to obtain the X DL reported to the first communication device.
  • the second communication device first calculates the downlink power information X DL of each receiving port corresponding to the N receiving space parameters through formulas (4) to (5), and then selects each X The maximum value in DL is used as the X DL reported to the first communication device .
  • the at least one piece of power information includes K pieces of power information, where the ith piece of power information is determined according to the ith piece of reception space parameters among the K pieces of reception space parameters, and the N pieces of reception space parameters include all
  • K pieces of power information i is an integer greater than or equal to 1 and less than or equal to K.
  • the second communication device selects a part of them, that is, the K power information corresponding to the K receiving space parameters, and The K pieces of power information are sent to the first communication device.
  • the second communication device obtains N power information corresponding to the N receiving space parameters, and sends the N power information to the first communication Device.
  • the fourth method can solve the problem caused by inaccurate amplitude calibration of multiple sending ports of the second communication device.
  • the second communication device has two transmitting ports and two receiving ports, where the two receiving ports have the same amplitude gain on the received signal, and the two transmitting ports have different amplitude gains on the transmitted signal.
  • the second communication device needs to measure and feed back the power information X DL, l for each receiving port.
  • the first communication device can determine E tx / E srs, l according to the foregoing method by measuring X UL, l corresponding to the two sending ports, and then determine the channel matrix information required to calculate the precoding matrix according to the channel estimation result obtained by the SRS.
  • the power information of the first reference signal may be a weighted summation of power information on time-frequency resources occupied by the first reference signal in L time units, where L is a positive integer .
  • a problem caused by inaccurate amplitude calibration of multiple transmission space parameters of the second communication device can be solved.
  • the first communication device needs to obtain accurate relative gains of the channels of the multiple receiving ports.
  • the channels of different receiving ports are obtained by sending uplink reference signals from different transmitting ports, inaccurate amplitude calibration of different transmitting ports will cause the measurement of channels of different receiving ports to be affected by inaccurate amplitude calibration, resulting in different receiving ports The relative gain of the channel is not accurate.
  • the second communication device separately measures the power information corresponding to the different receiving space parameters and reports it to the first communication device.
  • the first communication device measures the uplink power information corresponding to the different transmitting space parameters, and the first communication device can pass Correct the problem caused by inaccurate transmit power calibration of different transmit ports, eliminate the impact of transmit power of different transmit ports, and make the precoding matrix more accurate.
  • the second communication device may determine whether to send the at least one power information according to an instruction of the first communication device.
  • the first communication device may send the first configuration information to the second communication device, where the first configuration information is used to indicate related configuration parameters of the at least one power information.
  • the configuration parameters include the frequency domain bandwidth corresponding to the power information, and may also include the value of K described above, and may also include an indication field of the associated second reference signal configuration information. This application is not restricted.
  • the second communication device may measure the power information of the first reference signal according to the indication of the first instruction information, and send the at least one power information to the first communication device. .
  • the first communication device when sending the first configuration information, may carry the first indication information in the first configuration information, that is, the first configuration information includes the first indication information.
  • the above-mentioned first indication information may also be included in other messages or information.
  • the above-mentioned first indication information may be sent through the third configuration information, which is not specifically limited in this embodiment of the present application.
  • the foregoing first indication information may be carried by at least one of RRC, MAC, CE, or DCI signaling.
  • the first configuration information may be carried by RRC signaling.
  • the second communication device may further send second instruction information, where the second instruction information is used to indicate a receiver type of the second communication device.
  • the receiver type is used to indicate that the second communication device is a linear receiver or a non-linear receiver.
  • the foregoing receiver type is used to indicate a type of a linear receiver, including a maximum ratio combining receiver MRC, a minimum mean square error receiver MMSE-IRC, and the like.
  • the type of the linear receiver is represented by 1 bit.
  • 0 indicates an MRC receiver
  • 1 indicates an MMSE-IRC receiver.
  • the foregoing receiver type is used to indicate the type of the receiver, including MRC, MMSE-IRC, and a minimum mean square error serial interference cancellation receiver MMSE-SIC.
  • the type of the linear receiver is represented by 2 bits.
  • 00 indicates the MRC receiver
  • 01 indicates the MMSE-IRC receiver
  • 10 indicates the MMSE-SIC receiver.
  • the foregoing receiver type is used to indicate receiver complexity.
  • the receiver type can be inferred from the receiver complexity.
  • the terminal device needs to participate in the iterative process, that is, the terminal device needs to send SRS multiple times, resulting in low system complexity.
  • sending the receiver type to the network device through the terminal device can enable the network device to perform multiple iterations by itself, avoiding the terminal
  • the device sends SRS multiple times, reducing the complexity of the terminal device and greatly increasing the iteration speed, so that the performance gain of iterative optimization can be realized.
  • the methods provided in the embodiments of the present application are introduced from the perspective of the first communication device, the second communication device, and the interaction between the first communication device and the second communication device, respectively.
  • the first communication device and the second communication device may include a hardware structure and / or a software module in the form of a hardware structure, a software module, or a hardware structure plus a software module To achieve the above functions. Whether one of the above functions is executed by a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application of the technical solution and design constraints.
  • FIG. 4 is a module structure diagram of a communication device according to an embodiment of the present application.
  • the device may be a second communication device or a second communication device capable of supporting the second communication device in the method provided in the embodiment of the application
  • the device may be a device or a chip system in a second communication device.
  • the device includes a receiving module 401, a processing module 402, and a sending module 403.
  • the chip system may be composed of a chip, and may also include a chip and other discrete devices.
  • the processing module 402 is configured to obtain first indication information.
  • the receiving module 401 is configured to receive a first reference signal.
  • the sending module 403 is configured to send at least one power information of the first reference signal, where the at least one power information is determined according to a receiving space parameter indicated by the first instruction information, where the receiving space parameter includes the first The first antenna parameters of the two communication devices.
  • the power information is a parameter determined according to a received power of a signal.
  • the power information may be RSRP, RSRQ, RSSI, or received amplitude information, and may also be determined by at least one of RSRP, RSRQ, RSSI, and received amplitude information.
  • the first antenna parameter includes antenna port information for the second communication device to measure the power information.
  • the received spatial parameters further include received spatial filtering parameters.
  • the received spatial filtering parameter may be a spatial Rx parameter.
  • processing module 402 is specifically configured to:
  • the first instruction information is transmitted through the sending module 403, or the first instruction information is received through the receiving module 401.
  • the first indication information indicates N receiving space parameters
  • the at least one power information is determined according to a receiving space parameter indicated by the first instruction information, and includes:
  • the at least one power information is determined according to the N receiving space parameters.
  • processing module 402 is further configured to:
  • Acquire configuration information of a second reference signal where the second reference signal includes M ports, and different ports in the M ports have different transmission space parameters.
  • the transmission space parameter includes a second antenna parameter and / or a transmission space filter parameter
  • the second antenna parameter includes antenna port information that the second communication device sends the second reference signal
  • the first indication information indicates N receiving space parameters, which may be information indicating a receiving port of the second communication device, or an associated reference signal.
  • the reference signal associated with the indication may be configuration information indicating at least one second reference signal resource, or may be configuration information indicating at least one second reference signal resource set.
  • the first indication information indicates an associated reference signal
  • the first indication information indicates N receiving space parameters, including:
  • the first indication information indicates configuration information of the second reference signal, and the N reception space parameters are associated with the transmission space parameters of the M ports;
  • the N receiving spatial parameters are associated with the transmitting spatial parameters of the M ports, and include:
  • the N reception space parameters are determined based on the transmission space parameters of all or part of the M ports, or
  • the sending space parameters of all or part of the M ports are determined based on the N receiving space parameters.
  • the N receiving space parameters are associated with the sending space parameters of the M1 ports, including:
  • the N reception space parameters are determined based on the transmission space parameters of the M1 ports, or
  • the sending space parameters of the M1 ports are determined based on the N receiving space parameters.
  • the at least one power information is determined according to the N receiving space parameters, including:
  • the at least one power information is determined according to a maximum value of the power information of the first reference signal corresponding to the N received spatial parameters.
  • the at least one power information is determined according to the N receiving space parameters, including:
  • the at least one power information is determined according to an average value of power information of the first reference signal corresponding to the N received spatial parameters.
  • the at least one power information is determined according to the N receiving space parameters, including:
  • the at least one power information includes K power information, wherein the i-th power information is determined according to the i-th reception space parameter among the K reception space parameters, and the N reception space parameters include the K power Information, i is greater than or equal to 1 and less than or equal to K.
  • the at least one power information is determined according to the N receiving space parameters, including:
  • the at least one power information is determined according to a sum value of power information of the first reference signal corresponding to the N received spatial parameters.
  • the receiving module 401 is further configured to:
  • the sending module 403 is further configured to:
  • Sending second instruction information where the second instruction information is used to indicate a receiver type of the second communication device.
  • the power information of the first reference signal is a weighted summation of power information on time-frequency resources occupied by the first reference signal in L time units, and L is a positive integer.
  • the receiving module 401 is further configured to:
  • FIG. 5 is a module structural diagram of another communication device according to an embodiment of the present application.
  • the device may be a first communication device or may be capable of supporting the first communication device to implement the first communication in the method provided in the embodiment of the present application.
  • the device of the function of the device for example, the device may be a device or a chip system in a first communication device.
  • the device includes a sending module 501, a processing module 502, and a receiving module 503.
  • the chip system may be composed of a chip, and may also include a chip and other discrete devices.
  • the processing module 502 is configured to obtain first indication information.
  • the sending module 501 is configured to send a first reference signal.
  • the receiving module 503 is configured to receive at least one power information of the first reference signal, where the at least one power information is determined according to a receiving space parameter indicated by the first instruction information, where the receiving space parameter includes the first The first antenna parameters of the two communication devices.
  • the power information is a parameter determined according to a received power of a signal.
  • the power information may be RSRP, RSRQ, RSSI, or received amplitude information, and may also be determined by at least one of RSRP, RSRQ, RSSI, and received amplitude information.
  • the first antenna parameter includes antenna port information for the second communication device to measure the power information.
  • the received spatial parameters further include received spatial filtering parameters.
  • the received spatial filtering parameter may be a spatial Rx parameter.
  • processing module 502 is specifically configured to:
  • the first instruction information is transmitted through the sending module 501, or the first instruction information is received through the receiving module 503.
  • the first indication information indicates N receiving space parameters
  • the at least one power information is determined according to a receiving space parameter indicated by the first instruction information, and includes:
  • the at least one power information is determined according to the N receiving space parameters.
  • the sending module 501 is further configured to:
  • Send configuration information of a second reference signal where the second reference signal includes M ports, and different ports in the M ports have different transmission space parameters.
  • the transmission space parameter includes a second antenna parameter and / or a transmission space filter parameter
  • the second antenna parameter includes antenna port information that the second communication device sends the second reference signal
  • the first indication information indicates N receiving space parameters, which may be information indicating a receiving port of the second communication device, or an associated reference signal.
  • the reference signal associated with the indication may be configuration information indicating at least one second reference signal resource, or may be configuration information indicating at least one second reference signal resource set.
  • the first indication information indicates an associated reference signal
  • the first indication information indicates N receiving space parameters, including:
  • the first indication information indicates configuration information of the second reference signal, and the N reception space parameters are associated with the transmission space parameters of the M ports;
  • the N receiving spatial parameters are associated with the transmitting spatial parameters of the M ports, and include:
  • the N reception space parameters are determined based on the transmission space parameters of all or part of the M ports, or
  • the sending space parameters of all or part of the M ports are determined based on the N receiving space parameters.
  • the N receiving space parameters are associated with the sending space parameters of the M1 ports, including:
  • the N reception space parameters are determined based on the transmission space parameters of the M1 ports, or
  • the sending space parameters of the M1 ports are determined based on the N receiving space parameters.
  • the at least one power information is determined according to the N receiving space parameters, including:
  • the at least one power information is determined according to a maximum value of the power information of the first reference signal corresponding to the N received spatial parameters.
  • the at least one power information is determined according to the N receiving space parameters, including:
  • the at least one power information is determined according to an average value of power information of the first reference signal corresponding to the N received spatial parameters.
  • the at least one power information is determined according to the N receiving space parameters, including:
  • the at least one power information includes K power information, wherein the i-th power information is determined according to the i-th reception space parameter among the K reception space parameters, and the N reception space parameters include the K power Information, i is greater than or equal to 1 and less than or equal to K.
  • the at least one power information is determined according to the N receiving space parameters, including:
  • the at least one power information is determined according to a sum value of power information of the first reference signal corresponding to the N received spatial parameters.
  • the sending module 501 is further configured to:
  • the receiving module 503 is further configured to:
  • Receiving second instruction information where the second instruction information is used to indicate a receiver type of the second communication device.
  • the power information of the first reference signal is a weighted summation of power information on time-frequency resources occupied by the first reference signal in L time units, and L is a positive integer.
  • the sending module 501 is further configured to:
  • the division of the modules in the embodiments of the present application is schematic and is only a logical function division. In actual implementation, there may be another division manner.
  • the functional modules in the embodiments of the present application may be integrated into one process. In the device, it can also exist separately physically, or two or more modules can be integrated into one module.
  • the above integrated modules may be implemented in the form of hardware or software functional modules.
  • an apparatus 600 is used to implement the function of the second communication apparatus in the foregoing method.
  • the device may be a second communication device, or may be a device capable of supporting the second communication device to implement the functions of the second communication device in the method provided in the embodiment of the present application.
  • the device may be a chip system.
  • the apparatus 600 includes at least one processor 620, configured to implement the function of the second communication apparatus in the method provided in the embodiment of the present application.
  • the processor 620 may obtain the first indication information. For details, refer to the detailed description in the method example, and details are not described herein.
  • the apparatus 600 may further include at least one memory 630 for storing program instructions and / or data.
  • the memory 630 and the processor 620 are coupled.
  • the coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, and may be electrical, mechanical or other forms for information exchange between devices, units or modules.
  • the processor 620 may operate in cooperation with the memory 630.
  • the processor 620 may execute program instructions stored in the memory 630. At least one of the at least one memory may be included in a processor.
  • the device 600 may further include a communication interface 610 for communicating with other devices through a transmission medium, so that the devices used in the device 600 may communicate with other devices.
  • the communication interface may be any form of interface capable of communication, such as a module, a circuit, a bus, or a combination thereof.
  • the communication interface 610 may be a transceiver.
  • the other device may be a first communication device.
  • the processor 620 uses the communication interface 610 to send and receive data, and is configured to implement the method performed by the second communication device described in the foregoing method embodiment.
  • connection medium between the communication interface 610, the processor 620, and the memory 630 is not limited in the embodiment of the present application.
  • the memory 630, the processor 620, and the communication interface 610 are connected by a bus 640 in FIG. 6.
  • the bus is shown by a thick line in FIG. 6.
  • the connection modes of other components are only schematically illustrated. It is not limited.
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only a thick line is used in FIG. 6, but it does not mean that there is only one bus or one type of bus.
  • an apparatus 700 is used to implement the function of the first communication apparatus in the foregoing method.
  • the device may be a first communication device or a device capable of supporting the first communication device to implement the functions of the first communication device in the method provided in the embodiment of the present application.
  • the device may be a chip system.
  • the apparatus 700 includes at least one processor 720, and is configured to implement the function of the first communication apparatus in the method provided in the embodiment of the present application.
  • the processor 720 may obtain the first indication information. For details, refer to the detailed description in the method example, and details are not described herein.
  • the apparatus 700 may further include at least one memory 730 for storing program instructions and / or data.
  • the memory 730 and the processor 720 are coupled.
  • the coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, and may be electrical, mechanical or other forms for information exchange between devices, units or modules.
  • the processor 720 may operate in cooperation with the memory 730.
  • the processor 720 may execute program instructions stored in the memory 730. At least one of the at least one memory may be included in a processor.
  • the device 700 may further include a communication interface 710 for communicating with other devices through a transmission medium, so that the devices used in the device 700 may communicate with other devices.
  • the communication interface may be any form of interface capable of communication, such as a module, a circuit, a bus, or a combination thereof.
  • the communication interface 710 may be a transceiver.
  • the other device may be a second communication device.
  • the processor 720 uses the communication interface 710 to send and receive data, and is configured to implement the method performed by the first communication device described in the foregoing method embodiment.
  • connection medium between the communication interface 710, the processor 720, and the memory 730 is not limited in the embodiment of the present application.
  • the memory 730, the processor 720, and the communication interface 710 are connected by a bus 740 in FIG. 7.
  • the bus is indicated by a thick line in FIG. 7.
  • the connection modes of other components are only schematically illustrated. It is not limited.
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is used in FIG. 7, but it does not mean that there is only one bus or one type of bus.
  • the processor may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, which may implement or The disclosed methods, steps and logic block diagrams in the embodiments of the present application are executed.
  • a general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in combination with the embodiments of the present application may be directly implemented by a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the memory may be a non-volatile memory, such as a hard disk (HDD) or a solid-state drive (SSD), etc., and may also be a volatile memory (volatile memory), such as Random-access memory (RAM).
  • the memory is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.
  • the memory in the embodiment of the present application may also be a circuit or any other device capable of implementing a storage function, for storing program instructions and / or data.
  • the methods provided in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software When implemented in software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer program instructions When the computer program instructions are loaded and executed on a computer, the processes or functions according to the embodiments of the present invention are wholly or partially generated.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user equipment, or another programmable device.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted 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 Transmission to another website site, computer, server, or data center through 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 such as a server, a data center, and the like that includes one or more available medium integration.
  • 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 digital video disc (DVD), or a semiconductor medium (for example, an SSD), or the like.

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Abstract

本申请实施例涉及一种通信方法、装置及***，所述方法包括：终端设备获取第一指示信息所指示的接收空间参数，测量网络设备发送的第一参考信号，获得至少一个下行功率信息，其中，接收空间参数包括终端设备的天线参数，例如天线端口等。终端设备向网络设备发送该至少一个下行功率信息。网络设备基于该至少一个下行功率信息的上报和自身测量的上行功率信息，可以消除终端设备发送上行参考信号的发送功率对该终端设备的信道的估计结果的影响。

Description

通信方法、装置及*** 技术领域
本申请实施例涉及通信技术，尤其涉及一种通信方法、装置及***。
背景技术
多输入多输出(Multi-Input Multi-Output，MIMO)***是利用多个发送天线和多个接收天线进行发送信号和接收信号的***。在发送端使用了合适的预编码矩阵P、接收端使用了合适的接收机矩阵G的前提下，MIMO***可以在相同的时频资源同时向一个接收端发送多个数据流，或者同时向多个接收端发送多个数据流，从而显著提升***的频谱效率。其中，发送端使用的预编码矩阵P和接收端使用的接收机矩阵G的设计对***性能有重要影响。以下行数据传输为例，发送端为网络设备，接收端为终端设备。网络设备需要同时为多个终端设备发送数据，因此，网络设备使用的预编码矩阵P要尽量降低不同数据流之间的干扰，提高每个终端设备的数据接收信噪比，每个终端设备的接收机矩阵G需要尽量抑制其他数据流对自身数据流的干扰，进一步提高自身的接收信噪比。
现有技术通过联合迭代优化的方式优化网络设备的预编码矩阵P和至少一个终端设备的接收机矩阵G。在一种较优的预编码矩阵P设计中，预编码矩阵P需要获得被服务的多个终端设备的信道的相对增益，以及同一个接收端的不同端口的信道的相对增益。但是，当前技术无法使发送端获得上述相对增益的准确值，使得预编码矩阵P的取值无法匹配实际的信道，导致数据传输的性能受到影响。例如，在时分双工(time division duplex，TDD)***中，多个被服务的终端设备的信道是通过终端设备发送上行参考信号获得的。但是，通过上行参考信号获得的信道信息包含了上行参考信号的发送功率。由于终端设备的器件非理想因素，网络设备无法获知实际的上行参考信号发送功率，从而无法从测量结果中去除该功率的影响。由于不同终端设备的上行参考信号发送功率可能不同，因此，不同终端设备的信道的相对增益无法通过上行信道的测量获取。因此，根据已有技术获得的预编码矩阵P无法匹配实际的信道。
发明内容
本申请实施例第一方面提供一种通信方法，该方法包括：
第二通信装置获取第一指示信息，第二通信装置接收第一参考信号，第二通信装置发送所述第一参考信号的至少一个功率信息，所述至少一个功率信息是根据所述第一指示信息指示的接收空间参数确定的，所述接收空间参数包括所述第二通信装置的第一天线参数。
在该方法中，第二通信装置通过第一指示信息所指示的接收空间参数确定第一参考信号的至少一个功率信息。当第一通信装置接收到该至少一个功率信息后，可以基于该至少一个功率信息以及第一通信装置自身测量得到的上行功率信息确定预编码矩阵。第一指示信息的作用在于使得第二通信装置上报的至少一个功率信息与第一通信装置测量的上行 功率信息具有关联关系，从而使得第一通信装置能够消除第二通信装置的上行参考信号的发送功率的影响，从而使得确定的预编码矩阵与实际的信道匹配。
在一种可能的设计中，所述第二通信装置获取第一指示信息，包括：
所述第二通信装置发送所述第一指示信息，或者，所述第二通信装置接收所述第一指示信息。
第二通信装置发送第一指示信息，将至少一个功率信息所基于的接收空间参数告知第一通信装置，可以使第一通信装置基于相关联的第二通信装置的发送空间参数测量上行功率信息，从而使得第二通信装置上报的至少一个功率信息与第一通信装置测量的上行功率信息具有关联关系，从而使得第一通信装置能够消除第二通信装置的上行参考信号的发送功率的影响，从而使得确定的预编码矩阵与实际的信道匹配。可选的，该方法适用于第二通信装置首先测量第一参考信号，再发送上行参考信号的情况。可选的，该方法可以使得第二通信装置选择功率信息测量质量最好(例如，功率取值最大)的功率信息对应的接收空间参数，从而提高上述至少一个功率信息的测量准确度。
可选的，所述第二通信装置接收所述第一指示信息，适用于第二通信装置首先发送上行参考信号，再测量第一参考信号的情况。第一通信装置首先测量上行参考信号，并根据自己的实现算法选择上行参考信号对应的全部或部分接收空间参数来测量上行功率信息。第一通信装置将该上行功率信息对应的接收空间参数指示给第二通信装置，使得第二通信装置上报的至少一个功率信息与第一通信装置测量的上行功率信息具有关联关系，从而使得第一通信装置能够消除第二通信装置的上行参考信号的发送功率的影响，从而使得确定的预编码矩阵与实际的信道匹配。可选的，该方法可以使得第一通信装置选择功率信息测量质量最好(例如，功率取值最大)的上行功率信息，提高上述上行功率信息的测量准确度。
在一种可能的设计中，还包括：
第二通信装置获取第二参考信号的配置信息，所述第二参考信号包括M个端口，所述M个端口中不同端口的发送空间参数不同。
为了使得第二通信装置上报的至少一个功率信息与第一通信装置测量的上行功率信息具有关联关系，一种方式是将接收第一参考信号的接收空间参数与发送第二参考信号的发送空间参数相关联。当第二通信装置采用多个不同的接收空间参数接收第一参考信号时，相关联的多个发送空间参数也不应当不同。
在一种可能的设计中，还包括：
所述第二通信装置接收第一配置信息，所述第一配置信息用于指示所述第二通信装置发送所述至少一个功率信息。
在一种可能的设计中，还包括：
所述第二通信装置发送第二指示信息，所述第二指示信息用于指示所述第二通信装置的接收机类型。
该方法中，由第二通信装置向第一通信装置发送接收机类型，可以使得第一通信装置可以自行执行多次迭代，从而避免第二通信装置参与迭代，降低第二通信装置的计算复杂度，避免发送多次上行参考信号，从而大幅度提高迭代速度，从使得迭代优化的性能增益得以实现。
在一种可能的设计中，还包括：
所述第二通信装置接收第二配置信息，所述第二配置信息用于指示所述N。
通过灵活配置N，可以根据实际情况选择最优的功率信息计算方案，使相对信道增益的获取更准确。例如，第二通信装置具有2个发送端口，4个接收端口，并且不支持天线选择。则第一通信装置计算上行功率信息只能基于2个发送端口发送的上行参考信号。此时，第二通信装置计算第一参考信号的功率信息时，也应该基于这2个发送端口相关联的2个接收端口进行计算。否则，若另外2个接收端口(无法发送上行参考信号)与上述2个接收端口对应的信道增益(如大尺度衰落等)差距过大，则基于4个接收端口测量的第一参考信号的功率信息与基于上述2个接收端口测量的第一参考信号的功率信息具有较大差距。此时，若基于4个接收端口计算功率信息，则难以准确的消除上行参考信号发送功率的影响。针对这种情况，第二配置信息可以配置N＝2。对于发送端口与接收端口个数相同的第二通信装置，可以配置N为全部接收端口的个数，也可以配置N为部分接收端口的个数。
本申请实施例第二方面提供一种通信方法，该方法包括：
第一通信装置获取第一指示信息，第一通信装置发送第一参考信号，第一通信装置接收所述第一参考信号的至少一个功率信息，所述至少一个功率信息是根据所述第一指示信息指示的接收空间参数确定的，所述接收空间参数包括所述第二通信装置的第一天线参数。
在该方法中，第二通信装置通过第一指示信息所指示的接收空间参数确定第一参考信号的至少一个功率信息。当第一通信装置接收到该至少一个功率信息后，可以基于该至少一个功率信息以及第一通信装置自身测量得到的上行功率信息确定预编码矩阵。第一指示信息的作用在于使得第二通信装置上报的至少一个功率信息与第一通信装置测量的上行功率信息具有关联关系，从而使得第一通信装置能够消除第二通信装置的上行参考信号的发送功率的影响，从而使得确定的预编码矩阵与实际的信道匹配。
在一种可能的设计中，所述第一通信装置获取第一指示信息，包括：
所述第一通信装置发送所述第一指示信息，或者，所述第一通信装置接收所述第一指示信息。
第一通信装置接收第一指示信息，可以使第一通信装置基于相关联的第二通信装置的发送空间参数测量上行功率信息，从而使得第二通信装置上报的至少一个功率信息与第一通信装置测量的上行功率信息具有关联关系，从而使得第一通信装置能够消除第二通信装置的上行参考信号的发送功率的影响，从而使得确定的预编码矩阵与实际的信道匹配。可选的，该方法适用于第二通信装置首先测量第一参考信号，再发送上行参考信号的情况。可选的，该方法可以使得第二通信装置选择功率信息测量质量最好(例如，功率取值最大)的功率信息对应的接收空间参数，从而提高上述至少一个功率信息的测量准确度。
第一通信装置发送所述第一指示信息，适用于第二通信装置首先发送上行参考信号，再测量第一参考信号的情况。第一通信装置首先测量上行参考信号，并根据自己的实现算法选择上行参考信号对应的全部或部分接收空间参数来测量上行功率信息。第一通信装置将该上行功率信息对应的接收空间参数指示给第二通信装置，使得第二通信装置上报的至少一个功率信息与第一通信装置测量的上行功率信息具有关联关系，从而使得第一通信装置能够消除第二通信装置的上行参考信号的发送功率的影响，从而使得确定的预编码矩阵 与实际的信道匹配。可选的，该方法可以使得第一通信装置选择功率信息测量质量最好(例如，功率取值最大)的上行功率信息，提高上述上行功率信息的测量准确度。
在一种可能的设计中，还包括：
第一通信装置发送第二参考信号的配置信息，所述第二参考信号包括M个端口，所述M个端口中不同端口的发送空间参数不同。
为了使得第二通信装置上报的至少一个功率信息与第一通信装置测量的上行功率信息具有关联关系，一种方式是将接收第一参考信号的接收空间参数与发送第二参考信号的发送空间参数相关联。当第二通信装置采用多个不同的接收空间参数接收第一参考信号时，相关联的多个发送空间参数也不应当不同。
在一种可能的设计中，还包括：
所述第一通信装置发送第一配置信息，所述第一配置信息用于指示所述第二通信装置发送所述至少一个功率信息。
在一种可能的设计中，还包括：
所述第一通信装置接收第二指示信息，所述第二指示信息用于指示所述第二通信装置的接收机类型。
该方法中，由第二通信装置向第一通信装置发送接收机类型，可以使得第一通信装置可以自行执行多次迭代，从而避免第二通信装置参与迭代，降低第二通信装置的计算复杂度，避免发送多次上行参考信号，从而大幅度提高迭代速度，从使得迭代优化的性能增益得以实现。
在一种可能的设计中，还包括：
所述第一通信装置发送第二配置信息，所述第二配置信息用于指示所述N。
通过灵活配置N，可以根据实际情况选择最优的功率信息计算方案，使相对信道增益的获取更准确。例如，第二通信装置具有2个发送端口，4个接收端口，并且不支持天线选择。则第一通信装置计算上行功率信息只能基于2个发送端口发送的上行参考信号。此时，第二通信装置计算第一参考信号的功率信息时，也应该基于这2个发送端口相关联的2个接收端口进行计算。否则，若另外2个接收端口(无法发送上行参考信号)与上述2个接收端口对应的信道增益(如大尺度衰落等)差距过大，则基于4个接收端口测量的第一参考信号的功率信息与基于上述2个接收端口测量的第一参考信号的功率信息具有较大差距。此时，若基于4个接收端口计算功率信息，则难以准确的消除上行参考信号发送功率的影响。针对这种情况，第二配置信息可以配置N＝2。对于发送端口与接收端口个数相同的第二通信装置，可以配置N为全部接收端口的个数，也可以配置N为部分接收端口的个数。
在上述第一方面到上述第二方面，还有如下可能的设计：
在一种可能的设计中，所述功率信息是根据信号的接收功率确定的参数。所述功率信息可以为RSRP、RSRQ、RSSI或者接收幅度信息，也可以由RSRP、RSRQ、RSSI以及接收幅度信息中的至少一项确定。
在一种可能的设计中，所述第一天线参数包括所述第二通信装置测量所述功率信息的天线端口信息。
通过使接收空间参数包括所述第二通信装置的第一天线参数，可以使得第一指示信息 能够指示上述至少一个功率信息的测量所基于的天线参数，例如天线端口信息或天线索引信息。由于不同天线端口/天线对应的信道不同，因此，通过明确指示天线端口的信息，可以使得上述关联关系更加准确，获得的预编码矩阵更准确。
在一种可能的设计中，所述接收空间参数还包括接收空间滤波参数。
对于同一个接收端口，不同的接收空间滤波参数也会影响该接收端口对应的信道响应。因此，通过使接收空间参数包括接收空间滤波参数，可以进一步使上述关联关系更加准确，获得的预编码矩阵更准确。
在一种可能的设计中，所述接收空间滤波参数可以为spatial Rx parameter。
在一种可能的设计中，所述第一指示信息指示N个接收空间参数；
所述至少一个功率信息是根据所述第一指示信息指示的接收空间参数确定的，包括：
所述至少一个功率信息是根据所述N个接收空间参数确定的。
在一种可能的设计中，所述发送空间参数包括第二天线参数和/或发送空间滤波参数，所述第二天线参数包括所述第二通信装置发送所述第二参考信号的天线端口信息。
在一种可能的设计中，所述第一指示信息指示N个接收空间参数，可以为指示第二通信装置的接收端口信息，或者，指示相关联的参考信号。
通过指示第二通信装置的接收端口信息，可以明确上述至少一个功率信息的测量所基于的接收端口。则第一通信装置测量上行功率信息时，所基于的第二通信装置的发送端口应该与该接收端口是关联的，例如，发送端口即为接收端口，和或发送端口的空间滤波参数等于接收端口的空间滤波参数。这样，可以使第一通信装置准确的消除上行参考信号功率的影响，使预编码矩阵匹配真实信道。
通过指示相关联的参考信号，也可以明确上述至少一个功率信息的测量所基于的接收空间参数，其中，所基于的接收空间参数与相关联的参考信号的发送端口的发送空间参数是相关联的(例如，相等)。以第一通信装置首先测量上行参考信号为例，第一通信装置根据自己的实现算法选择全部或部分发送空间参数(例如，发送端口)测量上行功率信息。第一通信装置将该上行功率信息指示给第二通信装置，则第二通信装置获得在测量第一参考信号时需要使用的接收空间参数应该与指示的发送空间参数相关联(例如，相等)。则基于通过这种方式计算并上报的至少一个功率信息与第一通信装置测量的上行功率信息，可以使得第一通信装置消除上行参考信号的发送功率的影响，从而使得确定的预编码矩阵与实际的信道匹配。
在一种可能的设计中，上述指示相关联的参考信号，可以是指示至少一个第二参考信号资源的配置信息，或者，还可以是指示至少一个第二参考信号资源集合的配置信息。
可选的，可以指示至少一个第二参考信号资源的配置索引，或者，指示至少一个第二参考信号资源集合的配置索引。通过较少的比特数，即可指示出来需要的信息。其中第二参考信号是第二通信装置所发送的上行参考信号。
在一种可能的设计中，若所述第一指示信息指示相关联的参考信号，则所述第一指示信息指示N个接收空间参数，包括：
所述第一指示信息指示所述第二参考信号的配置信息，所述N个接收空间参数与所述M个端口的发送空间参数相关联；
或者，
所述第一指示信息用于指示所述M个端口中的M1个端口，所述N个接收空间参数与所述M1个端口的发送空间参数相关联，1<＝M1<＝M。
通过指示第二参考信号的配置信息，或者指示M个端口中的M1个端口，第一信息可以准确的指明上述至少一个功率信息是基于哪些接收空间参数测量的，从而使第一通信装置获取测量第二参考信号功率信息时需要基于的发送空间参数，或者，使第二通信装置获取测量至少一个功率信息时需要基于的接收空间参数。例如，第一通信装置测量M>1个发送端口的第二参考信号，并确定其中的M1个端口的信道质量最好，并基于这M1个端口测量了上行功率信息。则与这M1个端口的发送空间参数相关联的接收空间参数对应的信道质量也可能是最好的，基于这些接收空间参数测量至少一个功率信息，会更加准确。则，第一通信装置可以通过第一指示信息指示第二通信装置在测量第一参考信号的功率信息时，要基于与这M1个端口的发送空间参数相关联的接收空间参数，获得更准确的测量结果。
在一种可能的设计中，所述N个接收空间参数与所述M个端口的发送空间参数相关联，包括：
所述N个接收空间参数是基于所述M个端口中全部或部分端口的发送空间参数确定的，或者，所述M个端口中全部或部分端口的发送空间参数是基于N个接收空间参数确定的。
在一种可能的设计中，所述N个接收空间参数与所述M1个端口的发送空间参数相关联，包括：
所述N个接收空间参数是基于所述M1个端口的发送空间参数确定的，或者，所述M1个端口的发送空间参数是基于N个接收空间参数确定的。
可选的，上述N个接收空间参数是基于所述M个端口中全部或部分端口的发送空间参数确定的，为N个接收空间参数等于所述M个端口中全部或部分端口的发送空间参数；上述M个端口中全部或部分端口的发送空间参数是基于N个接收空间参数确定的，为M个端口中全部或部分端口的发送空间参数等于N个接收空间参数。其他同理，不再赘述。
通过将N个接收空间参数与M个端口的发送空间参数相关联，使得第一通信装置可以基于自己测量的上行功率信息以及第二通信装置上报的至少一个功率信息确定预编码矩阵，从而可以消除第二通信装置的上行参考信号的发送功率的影响，从而使得确定的预编码矩阵与实际的信道匹配。
在一种可能的设计中，所述至少一个功率信息是根据所述N个接收空间参数确定的，包括：
所述至少一个功率信息是根据所述N个接收空间参数对应的第一参考信号的功率信息的最大值确定的。
通过第一参考信号的功率信息的最大值确定至少一个功率信息，可以使得第二通信装置选择功率信息测量质量最好(例如，功率取值最大)的功率信息上报，提高至少一个功率信息的测量准确度，有助于准确的消除第二通信装置的上行参考信号的发送功率的影响，使得预编码矩阵更准确。
在一种可能的设计中，所述至少一个功率信息是根据所述N个接收空间参数确定的，包括：
所述至少一个功率信息是根据所述N个接收空间参数对应的第一参考信号的功率信息 的平均值确定的。
通过第一参考信号的功率信息的平均值确定至少一个功率信息，可以降低干扰和噪声对测量精度的影响，提高功率信息的测量准确性。
在一种可能的设计中，所述至少一个功率信息是根据所述N个接收空间参数确定的，包括：
所述至少一个功率信息包括K个功率信息，其中，第i个功率信息是根据K个接收空间参数中的第i个接收空间参数确定的，所述N个接收空间参数包括所述K个功率信息，1<＝i<＝K。
通过在至少一个功率信息中包括K个功率信息，可以解决第二通信装置的多个发送空间参数的幅度校准不精确造成的问题。
在一种可能的设计中，所述至少一个功率信息是根据所述N个接收空间参数确定的，包括：
所述至少一个功率信息是根据所述N个接收空间参数对应的第一参考信号的功率信息的求和值确定的。
在一种可能的设计中，所述第一参考信号的功率信息为所述第一参考信号在L个时间单元内占用的时频资源上的功率信息的加权求和值，L为正整数。
在一种可能的设计中，第一指示信息由RRC、MAC CE或DCI信令中的至少一个承载。
在一种可能的设计中，所述第一配置信息包括所述第一指示信息。
在一种可能的设计中，所述第一参考信号为CSI-RS或SSB，所述第二参考信号为SRS。
本申请实施例第三方面提供一种通信装置，该通信装置可以是第二通信装置，也可以是能够支持第二通信装置执行上述第一方面设计示例中的第二通信装置所执行的相应功能的装置，例如该装置可以是第二通信装置中的装置或者芯片***，该装置可以包括接收模块、处理模块和发送模块，这些模块可以执行上述第一方面设计示例中的第二通信装置所执行的相应功能，具体的：
处理模块，用于获取第一指示信息。
接收模块，用于接收第一参考信号。
发送模块，用于发送所述第一参考信号的至少一个功率信息，所述至少一个功率信息是根据所述第一指示信息指示的接收空间参数确定的，所述接收空间参数包括所述第二通信装置的第一天线参数。
在一种可能的设计中，第一指示信息的指示方法可以参见第一方面中的具体描述，此处不再具体限定。
本申请实施例第四方面提供一种通信装置，该通信装置可以是第一通信装置，也可以是能够支持第一通信装置执行上述第二方面设计示例中的第一通信装置所执行的相应功能的装置，例如该装置可以是第一通信装置中的装置或者芯片***，该装置可以包括发送模块、处理模块和接收模块，这些模块可以执行上述第二方面设计示例中的第一通信装置所执行的相应功能，具体的：
处理模块，用于获取第一指示信息。
发送模块，用于发送第一参考信号。
接收模块，用于接收所述第一参考信号的至少一个功率信息，所述至少一个功率信息 是根据所述第一指示信息指示的接收空间参数确定的，所述接收空间参数包括所述第二通信装置的第一天线参数。
在一种可能的设计中，第一指示信息的指示方法可以参见第二方面中的具体描述，此处不再具体限定。
本申请实施例第五方面提供一种通信装置，所述通信装置包括处理器，用于实现上述第一方面描述的方法中第二通信装置的功能。所述通信装置还可以包括存储器，用于存储程序指令和数据。所述存储器与所述处理器耦合，所述处理器可以调用并执行所述存储器中存储的程序指令，用于实现上述第一方面描述的方法中第二通信装置的功能。所述第二通信装置还可以包括通信接口，所述通信接口用于该第二通信装置与其它设备进行通信。示例性地，该其它设备为第一通信装置。
在一种可能的设计中，该第二通信装置包括：
通信接口；
存储器，用于存储程序指令；
处理器，用于获取第一指示信息，接收第一参考信号，以及，发送所述第一参考信号的至少一个功率信息，所述至少一个功率信息是根据所述第一指示信息指示的接收空间参数确定的，所述接收空间参数包括所述第二通信装置的第一天线参数。
在一种可能的设计中，第一指示信息的指示方法可以参见第一方面中的具体描述，此处不再具体限定。
本申请实施例第六方面提供一种通信装置，所述通信装置包括处理器，用于实现上述第二方面描述的方法中第一通信装置的功能。所述通信装置还可以包括存储器，用于存储程序指令和数据。所述存储器与所述处理器耦合，所述处理器可以调用并执行所述存储器中存储的程序指令，用于实现上述第二方面描述的方法中第一通信装置的功能。所述第一通信装置还可以包括通信接口，所述通信接口用于该第一通信装置与其它设备进行通信。示例性地，该其它设备为第二通信装置。
在一种可能的设计中，该第一通信装置包括：
通信接口；
存储器，用于存储程序指令；
处理器，用于获取第一指示信息，发送第一参考信号，以及，接收所述第一参考信号的至少一个功率信息，所述至少一个功率信息是根据所述第一指示信息指示的接收空间参数确定的，所述接收空间参数包括所述第二通信装置的第一天线参数。
在一种可能的设计中，第一指示信息的指示方法可以参见第二方面中的具体描述，此处不再具体限定。
本申请实施例第七方面提供一种芯片***，该芯片***包括处理器，还可以包括存储器，还可以包括通信接口，用于实现上述方法中第一通信装置或者第二通信装置的功能。该芯片***可以由芯片构成，也可以包含芯片和其他分立器件。
本申请实施例第八方面提供一种计算机程序产品，所述计算机程序产品包括计算机程序代码，当所述计算机程序代码被计算机执行时，使得所述计算机执行上述第一方面所述的方法，或者使得所述计算机执行第二方面所述的方法。
本申请实施例第九方面提供一种计算机可读存储介质，所述计算机存储介质存储有计 算机指令，当所述计算机指令被计算机执行时，使得所述计算机执行上述第一方面或者第二方面所述的方法。
本申请实施例第十方面提供一种***，所述***包括第三方面所述的通信装置和第四方面所述的通信装置；或者所述***包括第五方面所述的通信装置和第六方面所述的通信装置。
附图说明
图1为联合迭代优化方法在TDD***中执行的示例流程；
图2为本申请实施例涉及的通信方法的示例性***架构图；
图3为本申请实施例提供的一种通信方法的交互流程示意图；
图4为本申请实施例提供的一种通信装置的模块结构图；
图5为本申请实施例提供的另一种通信装置的模块结构图；
图6为本申请实施例提供的装置600的示意图；
图7为本申请实施例提供的装置700的示意图。
具体实施方式
本申请中，“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A,B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a,b,或c中的至少一项(个)，可以表示：a,b,c,a-b,a-c,b-c,或a-b-c，其中a,b,c可以是单个，也可以是多个。
在MIMO***中，发送端使用的预编码矩阵P和接收端使用的接收机矩阵G的设计对***性能有重要影响，预编码矩阵P的优化，是MIMO***中的重要问题。
在一种可能的设计中，可以通过联合迭代优化的方式优化P和G，即固定P优化G，以及固定G优化P，循环上述过程若干次。图1为该方法在TDD***中执行的示例流程，如图1所示，假设各终端设备的发送天线数和接收天线数相同，P和G联合迭代优化的过程为：
S101、网络设备通过测量K个终端设备的探测参考信号(sounding reference signal，SRS)，获得第k个终端设备的下行信道矩阵H k。
其中，H k是N rk行N t列的矩阵，N rk表示第k个终端设备的发送SRS的天线端口个数(也是接收下行信号的天线端口个数)，N t表示网络设备的天线端口数。基于K个终端设备的信道矩阵H k的信息，网络设备可以根据特定的算法或原则确定初始的预编码矩阵P＝[P 1….P K]
Figure PCTCN2018107430-appb-000001
P k表示网络设备为第k个终端设备确定的初始预编码矩阵，L表示网络设备调度的总数据层数，满足
Figure PCTCN2018107430-appb-000002
l k表示网络设备为第k个终端设备调度的数据层数。一种可选 的方式，P可以采用迫零(Zero Forcing，ZF)的设计原则获得。
S102、网络设备使用P k作为预编码矩阵，向第k个终端设备发送经过预编码的信道状态信息参考信号(channel state information reference signal，CSI-RS)。
S103、第k个终端设备测量等效信道H k*P k，确定初始接收机矩阵
Figure PCTCN2018107430-appb-000003
S104、第k个终端设备使用G k对SRS进行预编码，发送经过预编码的SRS，使网络设备获得等效信道G k*H k，则网络设备根据K个终端设备的等效信道确定此时的预编码矩阵P＝[P 1….P K]。
由于根据ZF原则获得的预编码矩阵并不是最优的预编码矩阵，因此，网络设备可以基于最小均方误差(Minimum Mean Square Error，MMSE)原则获得预编码矩阵以进一步提升***的和速率。
例如，网络设备可以通过下述公式(1)确定基于MMSE原则的预编码矩阵：
Figure PCTCN2018107430-appb-000004
其中，
Figure PCTCN2018107430-appb-000005
为维度为
Figure PCTCN2018107430-appb-000006
行N t列的矩阵，() H表示对矩阵的共轭转置，
Figure PCTCN2018107430-appb-000007
表示网络设备将来进行数据调度时的发送功率。G＝diag{G 1,...,G K}是由G 1,...,G K构成的块对角矩阵，维度为L行
Figure PCTCN2018107430-appb-000008
列。W为L行L列的矩阵，例如，可以根据各终端设备的优先权重确定。α和β为实数，I m为维度为m*m的单位阵。
S105、网络设备根据步骤S104所得到的P中的P k作为预编码矩阵，向第k个终端设备发送经过预编码的CSI-RS。
S106、第k个终端设备测量等效信道H k*P k，确定此时的接收机矩阵G k。
上述步骤S104-S106为一次迭代过程，在此基础上，可以迭代执行步骤S104-S106若干次。迭代中，网络设备的预编码矩阵P和各终端设备的接收机矩阵G k不断更新。当迭代收敛后，获得的P和G k可以彼此匹配的更好，提升***性能。
在使用上述方法优化预编码矩阵时，网络设备在确定预编码矩阵P时，需要确定各终端设备的信道矩阵H k(或者是G kH k)。
在TDD***中，H k是基于各个终端设备发送的SRS测量的信道确定的。测量的结果包含了SRS发送功率的影响，也即测量的结果是
Figure PCTCN2018107430-appb-000009
(或者
Figure PCTCN2018107430-appb-000010
)。其中，
Figure PCTCN2018107430-appb-000011
是终端设备k的SRS的发送功率。由于器件等非理想因素，网络设备无法获知实际的SRS发送功率，从而无法从测量结果中去除
Figure PCTCN2018107430-appb-000012
的影响，进而获得
Figure PCTCN2018107430-appb-000013
(或者
Figure PCTCN2018107430-appb-000014
)。也即，网络设备无法获得不同终端设备的信道增益的相对关系。因此，网络设备基于上述公式(1)获得的导MMSE预编码矩阵不能匹配实际的信道，严重降低***的性能。
在FDD***中，H k或相关的信息(例如H k的特征向量或相关矩阵)是各个终端设备上报 给网络设备的。为了降低反馈开销，终端设备会对H k或相关信息进行归一化，则网络设备也无法获得不同终端设备的相对信道增益。因此，网络设备基于上述公式(1)获得的导MMSE预编码矩阵也不能匹配实际的信道，严重降低***的性能。
本申请实施例所提供的方法，旨在解决上述问题。
为使本领域技术人员更好的理解本申请的技术方案，以下首先对本申请所涉及的技术术语进行解释。
1、功率信息
本申请实施例所述的功率信息是根据信号的接收功率确定的参数。例如，参考信号的功率信息可以是参考信号在占用的时频资源上的接收功率的平均值，或者是根据参考信号接收功率和或其它信息确定的参数。在当前的3GPP标准中，参考信号接收功率(Reference Signal Receiving Power，RSRP)、参考信号接收质量(Reference Signal Receiving Quality，RSRQ)、接收信号强度指示(Received Signal Strength Indicator，RSSI)均可以作为本申请实施例中功率信息的定义。或者，信号的功率信息还可以定义为信号的接收幅度信息等，也可以是根据其中的一个或多个确定的，本申请实施例对此不做具体限定。由于功率可以根据幅度确定，反之亦然，因此，两者可以认为是等价的。
其中，RSRP是在承载参考信号的所有时频资源上接收到的参考信号功率的平均值，RSSI是某个符号内承载的所有信号(包括导频信号、干扰信号、噪音信号等)功率的平均值，RSRQ是根据RSRP和RSSI确定的。
2、天线端口信息
本申请实施例所述的天线端口信息可以是天线的个数、天线端口的个数、天线的索引、天线端口的索引，或者是天线端口组的索引等，本申请实施例对此不做具体限制。
一个天线端口组由至少一个天线端口组成。一种定义方式是，一个天线端口组对应终端设备的一个天线面板(panel)上的所有天线或所有天线端口。一种定义方式是，一个天线端口组由终端设备可以同时发送信号(如SRS)的天线或天线端口组成。另外一种定义方式是，一个天线端口组由终端设备可以发送信号(如SRS)的天线或天线端口组成。另外一种定义方式是，一个天线端口组由终端设备可以同时接收信号的天线或天线端口组成。天线端口组还可以有其他定义方式，本申请实施例不做限制。一个天线端口可以对应一个物理天线，或者由多个物理天线经过加权之后形成，也可以有其他形式。本申请实施例对此不做具体限制。
3、接收空间滤波参数
接收空间滤波参数是指终端设备进行接收波束成型时形成波束采用的加权参数。该加权参数往往与下行信道在终端设备侧的波达角的相关信息有关。终端设备通过多个天线和相应的加权参数可以将多个物理天线虚拟化为一个接收天线端口。匹配信道的接收空间滤波参数可以提升下行信号的接收功率。
4、发送空间滤波参数
发送空间滤波参数是指终端设备进行发送波束成型时形成波束采用的加权参数。该加权参数往往与上行信道在终端设备侧的波离角的相关信息有关。终端设备通过多个天线和相应的加权参数可以将多个物理天线虚拟化为一个发送天线端口。匹配信道的发送空间滤 波参数可以提升网络设备接收上行信号的功率。
在某些情况下(如TDD***)，通过接收空间滤波参数可以确定发送空间滤波参数，反之亦然。在信道具有互易性的情况下，最优的接收空间滤波参数和最优的发送空间滤波参数是相同的，因此可以通过指示其中一个参数来确定另外一个参数。
图2为本申请实施例涉及的通信方法的示例性***架构图，如图2所示，该方法涉及终端设备和网络设备之间的通信。
本申请实施例中，终端设备可以是指向用户提供语音和/或数据连通性的设备，具有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备。终端设备可以经无线接入网(radio access network，RAN)与一个或多个核心网进行通信，终端设备可以是移动终端设备，如移动电话(或称为“蜂窝”电话)和具有移动终端设备的计算机，例如，可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，它们与无线接入网交换语言和/或数据。例如，个人通信业务(personal communication service，PCS)电话、无绳电话、会话发起协议(session initiation protocol，SIP)话机、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，未来5G网络中的终端或者未来演进的公用陆地移动通信网络(public land mobile network，PLMN)中的终端设备等，本申请实施例对此并不限定。终端设备也可以称为***、订户单元(subscriber unit)、订户站(subscriber station)，移动站(mobile station)、移动台(mobile)、远程站(remote station)、接入点(access point)、远程终端设备(remote terminal)、接入终端设备(access terminal)、用户终端设备(user terminal)、用户代理(user agent)、用户设备(user device)、或用户装备(user equipment)。
本申请实施例中，网络设备可以是基站。基站可以是一种部署在无线接入网中能够和终端设备进行无线通信的设备。基站可用于将收到的空中帧与IP分组进行相互转换，作为终端设备与接入网的其余部分之间的路由器，其中接入网的其余部分可包括网际协议(IP)网络；基站还可协调对空中接口的属性管理。例如，基站可以是全球移动通信***(global system for mobile communication，GSM)或码分多址(code division multiple access，CDMA)中的基站(base transceiver station，BTS)，也可以是宽带码分多址(wideband code division multiple access，WCDMA)中的基站(NodeB)，还可以是LTE中的演进型基站(eNB或e-NodeB，evolutional Node B)，也可以是NR中的gNB等。基站还可以是云无线接入网络(cloud radio access network，CRAN)场景下的无线控制器，或者可以为中继站、接入点、车载设备、可穿戴设备以及5G网络中的网络设备或者未来演进的PLMN网络中的网络设备等，本申请实施例并不限定。
另外，上述基站可以是宏基站，也可以是微基站。
本申请所涉及的方法对于同构网络与异构网络的场景均适用。同时，对于传输点也无限制，例如，可以支持宏基站与宏基站、微基站与微基站，以及，宏基站与微基站间的多点协同传输。另外，本申请所涉及的方法可以用于频分双工(frequency division duplex，FDD)***，也可以用于TDD***。同时，本申请所涉及的方法对于低频场景(6GHz以下)以及高频场景(6GHz以上)也均适用。
需要说明的是，本申请下述实施例所述的第一通信装置可以是上述图2所示例的网络设备，下述实施例所述的第二通信装置可以是上述图2所示例的终端设备，但是，本申请实施例并不以此为限。
图3为本申请实施例提供的一种通信方法的交互流程示意图，如图3所示，该方法涉及的交互流程为：
S301、第一通信装置向第二通信装置发送第一参考信号。
以第一通信装置为网络设备，第二通信装置为终端设备为例，网络设备可以向终端设备发送第一参考信号，用于终端设备测量第一参考信号的功率信息。
一种可选方式中，上述第一参考信号可以是CSI-RS。
另一种可选方式中，上述第一参考信号可以是同步信号(synchronization signal，SS)或同步信号块(SS block)。
另一种可选方式中，上述第一参考信号可以是解调参考信号(demodulation reference signal,DMRS)。
S302、第二通信装置根据第一指示信息所指示的接收空间参数，确定上述第一参考信号的至少一个功率信息。
其中，上述功率信息的具体含义可以参见前述的术语解释部分，此处不再赘述。
可选的，上述接收空间参数包括上述第二通信装置的第一天线参数。
通过使接收空间参数包括所述第二通信装置的第一天线参数，可以使得第一指示信息能够指示上述至少一个功率信息的测量所基于的天线参数，例如天线端口信息或天线索引信息。由于不同天线端口/天线对应的信道不同，因此，通过明确指示天线端口的信息，可以使得上述关联关系更加准确，获得的预编码矩阵更准确。
可选的，上述第一天线参数包括上述第二通信装置测量上述功率信息的天线端口信息。天线端口信息的具体含义可以参见前述的术语解释部分，此处不再赘述。
示例性的，上述第一天线参数可以包括上述第二通信装置测量上述功率信息的天线端口索引或天线索引。
可选的，上述接收空间参数还包括接收空间滤波参数。
对于同一个接收端口，不同的接收空间滤波参数也会影响该接收端口对应的信道响应。因此，通过使接收空间参数包括接收空间滤波参数，可以进一步使上述关联关系更加准确，获得的预编码矩阵更准确。
接收空间滤波参数具体含义可以参见前述的术语解释部分，此处不再赘述。示例性的，上述接收空间滤波参数可以称为spatial Rx paramters，该spatial Rx paramters包括天线的加权参数。
其中，在上行方向，第二通信装置可以向第一通信装置发送第二参考信号，用于第一通信装置测量上行的参考信号功率信息。可选的，该第二参考信号可以为SRS或DMRS。为便于描述，本申请以下实施例中以第一参考信号为CSI-RS，第二参考信号为SRS为例进行说明，但本申请实施例并不以此为限。
作为一种示例，可以通过指示信息使得第二通信装置发送SRS的天线端口的空间参数与接收CSI-RS的天线端口的空间参数相同。
其中，通过第一指示信息指示上述接收空间参数的具体过程将在下述实施例中进行详 细说明。
S303、第二通信装置向第一通信装置发送上述第一参考信号的至少一个功率信息。
S304、第一通信装置基于上述第一参考信号的至少一个功率信息确定预编码矩阵。
以下通过一个示例说明第一通信装置确定预编码矩阵的过程。
示例性的，假设第二通信装置包括多个天线端口，这多个天线端口既用于发送信号，也用于接收信号，则：
在上行方向，第二通信装置通过其中一个天线端口A发送SRS，相应的，第一通信装置可以使用一个天线端口B接收SRS，则第一通信装置在SRS所占用的第f个时频资源上的测量到的接收信号为：
Figure PCTCN2018107430-appb-000015
其中，E srs为第二通信装置发送SRS的功率，h f为第二通信装置的发送端口A到第一通信装置的接收端口B的上行信道系数，为复数，s为SRS符号，第一通信装置和第二通信装置预先已获知该参数的值，n为干扰和/或噪声。
进而，第一通信装置进行信道估计，获得在第f个时频资源上的上行信道估计结果
Figure PCTCN2018107430-appb-000016
进而，第一通信装置通过如下公式(3)计算第二通信装置的上述天线端口A对应的上行功率信息X UL：
Figure PCTCN2018107430-appb-000017
其中，F是SRS占用的时频资源总数。
Figure PCTCN2018107430-appb-000018
表示|x| 2的平均值。
在下行方向，第一通信装置通过上述端口B发送CSI-RS。第二通信装置通过多个接收端口接收CSI-RS。其中，在接收端口C上，第二通信装置获得CSI-RS所占用的第f个时频资源上的接收信号：
Figure PCTCN2018107430-appb-000019
其中，E csi-rs为第一通信装置发送CSI-RS的功率，h f为第一通信装置的发送端口B到第二通信装置的接收端口C的下行信道系数，x为CSI-RS符号，第一通信装置和第二通信装置预先已获知该参数的值，n’为干扰和或噪声。
进而，第二通信装置进行信道估计，获得在第f个时频资源上的下行信道估计结果
Figure PCTCN2018107430-appb-000020
进而，第二通信装置通过如下公式(5)计算第一通信装置的上述天线端口A对应的下行功率信息X DL：
Figure PCTCN2018107430-appb-000021
其中，F’是CSI-RS占用的RE总数。理想情况下，
Figure PCTCN2018107430-appb-000022
第二通信装置将X DL发送给第一通信装置，则第一通信装置可以获得：
Figure PCTCN2018107430-appb-000023
若
Figure PCTCN2018107430-appb-000024
则第一通信装置可以通过公式(7)获得E tx与E srs的比值：
X DL/X UL＝E csi- rs/E srs               (7)
若第一通信装置发送数据的功率E tx与发送CSI-RS的功率E csi-rs相等，或者具有预先知道的比值关系，则根据(7)可以计算得到E tx/E srs。
进而，第一通信装置根据上述公式(7)所计算出的比值，以及估计得到的
Figure PCTCN2018107430-appb-000025
通过下述公式(8)得到公式(1)所需要的一个第二通信装置的
Figure PCTCN2018107430-appb-000026
Figure PCTCN2018107430-appb-000027
其中，H为上述第二通信装置的信道矩阵。
由上述公式(8)可以看出，经过上述公式(8)的处理后，SRS发送功率的影响被消除。因此，当第一通信装置同时为K个第二通信装置传输数据时，可以通过上述的方法，获得第k个第二通信装置的E tx/E srs,k，进而获得
Figure PCTCN2018107430-appb-000028
因此，各个第二通信装置的相对信道增益被准确获取，第一通信装置通过上述公式(1)计算的预编码矩阵的准确性可以得到保证。
得到公式(7)的关键在于满足
Figure PCTCN2018107430-appb-000029
或者
Figure PCTCN2018107430-appb-000030
满足该等式或不等式的前提是第二通信装置的发送端口A和接收端口C是互相关联的端口，例如，对应相同的物理天线。若端口A和端口C由多个物理天线虚拟化而成，则端口A的接收滤波参数和端口C的发送滤波参数也是相同的。由于不同端口的信道是不同的，因此，如果没有端口A和端口C相关联的约束，则很难保证
Figure PCTCN2018107430-appb-000031
则无法获得准确的E tx/E srs。
因此，第一通信装置需要保证自身计算的X UL所对应的第二通信装置的发送端口与第二通信装置反馈的X DL所对应的接收端口是相关联的。因此，需要通过第一指示信息来指示反馈的X DL所对应的接收端口来保证如上约束。
本实施例中，第二通信装置通过第一指示信息所指示的接收空间参数确定第一参考信号的至少一个功率信息。当第一通信装置接收到该至少一个功率信息后，可以基于该至少 一个功率信息以及第一通信装置自身测量得到的上行功率信息确定预编码矩阵。第一指示信息的作用在于使得第二通信装置上报的至少一个功率信息与第一通信装置测量的上行功率信息具有关联关系，从而使得第一通信装置能够消除第二通信装置的上行参考信号的发送功率的影响，从而使得确定的预编码矩阵与实际的信道匹配。
作为一种可选的方式，上述第一通信装置可以首先获取上述第一指示信息，上述第二通信装置也可以首先获取上述第一指示信息。
需要说明的是，在本申请实施例中，对第一通信装置获取第一指示信息以及发送第一参考信号的先后顺序不做具体限定，第一通信装置可以先获取第一指示信息，再发送第一参考信号，也可以先发送第一参考信号，再获取第一指示信息。
另外，在本申请实施例中，对第二通信装置获取第一指示信息以及接收第一参考信号的先后顺序不做具体限定，第二通信装置可以先获取第一指示信息，再接收第一参考信号，也可以先接收第一参考信号，再获取第一指示信息。
其中，第一通信装置和第二通信装置获取上述第一指示信息的方式可以为以下任意一种。
第一种方式中，由第一通信装置向第二通信装置发送上述第一指示信息，第二通信装置接收上述第一指示信息。
在该方式中，第一通信装置首先确定第一指示信息，即获取到第一指示信息，进而，第一通信装置向第二通信装置发送第一指示信息。
示例性的，第一通信装置确定上述第一天线参数，得到用于指示该第一天线参数的第一指示信息，并向第二通信装置发送该第一指示信息。第二通信装置接收到第一指示信息后，可以获取到该第一天线参数。
所述第二通信装置接收所述第一指示信息，适用于第二通信装置首先发送上行参考信号，再测量第一参考信号的情况。第一通信装置首先测量上行参考信号，并根据自己的实现算法选择上行参考信号对应的全部或部分接收空间参数来测量上行功率信息。第一通信装置将该上行功率信息对应的接收空间参数指示给第二通信装置，使得第二通信装置上报的至少一个功率信息与第一通信装置测量的上行功率信息具有关联关系，从而使得第一通信装置能够消除第二通信装置的上行参考信号的发送功率的影响，从而使得确定的预编码矩阵与实际的信道匹配。可选的，该方法可以使得第一通信装置选择功率信息测量质量最好(例如，功率取值最大)的上行功率信息，提高上述上行功率信息的测量准确度。
第二种方式中，由第二通信装置向第一通信装置发送上述第一指示信息，第二通信装置接收上述第一指示信息。
在该方式中，第二通信装置首先确定第一指示信息，即获取到第一指示信息，进而，第二通信装置向第一通信装置发送第一指示信息。
示例性的，第二通信装置确定上述第一天线参数，得到用于指示该第一天线参数的第一指示信息，并向第一通信装置发送该第一指示信息。第一通信装置接收到第一指示信息后，可以获取到该第一天线参数。
第二通信装置发送第一指示信息，将至少一个功率信息所基于的接收空间参数告知第一通信装置，可以使第一通信装置基于相关联的第二通信装置的发送空间参数测量上行功率信息，从而使得第二通信装置上报的至少一个功率信息与第一通信装置测量的上行功率 信息具有关联关系，从而使得第一通信装置能够消除第二通信装置的上行参考信号的发送功率的影响，从而使得确定的预编码矩阵与实际的信道匹配。可选的，该方法适用于第二通信装置首先测量第一参考信号，再发送上行参考信号的情况。可选的，该方法可以使得第二通信装置选择功率信息测量质量最好(例如，功率取值最大)的功率信息对应的接收空间参数，从而提高上述至少一个功率信息的测量准确度。
以下说明通过第一指示信息指示上述接收空间参数的过程。
可选的，上述第一指示信息可以指示N个接收空间参数，N为大于零的整数。可选的，上述N可以为固定值，或者为预先配置的值。示例性的，第一通信装置可以向第二通信装置发送第二配置信息，该第二配置信息用于指示上述的N。
通过灵活配置N，可以根据实际情况选择最优的功率信息计算方案，使相对信道增益的获取更准确。例如，第二通信装置具有2个发送端口，4个接收端口，并且不支持天线选择。则第一通信装置计算上行功率信息只能基于2个发送端口发送的上行参考信号。此时，第二通信装置计算第一参考信号的功率信息时，也应该基于这2个发送端口相关联的2个接收端口进行计算。否则，若另外2个接收端口(无法发送上行参考信号)与上述2个接收端口对应的信道增益(如大尺度衰落等)差距过大，则基于4个接收端口测量的第一参考信号的功率信息与基于上述2个接收端口测量的第一参考信号的功率信息具有较大差距。此时，若基于4个接收端口计算功率信息，则难以准确的消除上行参考信号发送功率的影响。针对这种情况，第二配置信息可以配置N＝2。对于发送端口与接收端口个数相同的第二通信装置，可以配置N为全部接收端口的个数，也可以配置N为部分接收端口的个数。
示例性的，上述第二配置信息可以通过无线资源控制(radio resource control，RRC)信令、MAC控制元素(media access control control element，MAC CE)信令或下行控制信息(downlink control information，DCI)信令中的至少一个进行承载。
相应的，上述至少一个功率信息根据上述N个接收空间参数确定。
作为一种可选的实施方式，上述第一指示信息指示N个接收空间参数的方式可以是指示第二通信装置的接收端口信息(例如接收端口索引或接收端口个数)，其中，不同的接收端口的接收空间参数不同。
作为另外一种可选的实施方式，上述第一指示信息指示N个接收空间参数的方式可以是指示相关联的第二参考信号的配置信息，其中第二通信装置发送该第二参考信号的端口的发送空间参数与上述N个接收空间参数相关联。
通过指示第二通信装置的接收端口信息，可以明确上述至少一个功率信息的测量所基于的接收端口。则第一通信装置测量上行功率信息时，所基于的第二通信装置的发送端口应该与该接收端口是关联的，例如，发送端口即为接收端口，和或发送端口的空间滤波参数等于接收端口的空间滤波参数。这样，可以使第一通信装置准确的消除上行参考信号功率的影响，使预编码矩阵匹配真实信道。
通过指示相关联的参考信号，也可以明确上述至少一个功率信息的测量所基于的接收空间参数，其中，所基于的接收空间参数与相关联的参考信号的发送端口的发送空间参数是相关联的(例如，相等)。以第一通信装置首先测量上行参考信号为例，第一通信装置根据自己的实现算法选择全部或部分发送空间参数(例如，发送端口)测量上行功率信息。 第一通信装置将该上行功率信息指示给第二通信装置，则第二通信装置获得在测量第一参考信号时需要使用的接收空间参数应该与指示的发送空间参数相关联(例如，相等)。则基于通过这种方式计算并上报的至少一个功率信息与第一通信装置测量的上行功率信息，可以使得第一通信装置消除上行参考信号的发送功率的影响，从而使得确定的预编码矩阵与实际的信道匹配。
可选的，上述第二参考信号的配置信息可以包括：第二参考信号的端口个数，第二参考信号占用的时频资源等。可选的，不同端口的发送空间参数不同。可选的，发送空间参数可以包括第二天线参数和/或发送空间滤波参数。可选的，第二天线参数包括第二通信装置发送第二参考信号的天线端口信息。
示例性的，上述第二参考信号的配置信息可以配置第二通信装置发送第二参考信号的天线端口索引。
可选的，在第二通信装置向第一通信装置发送第二参考信号之前，第二通信装置可以首先获取第二参考信号的配置信息。可选的，第二参考信号的配置信息可以由第一通信装置向第二通信装置指示。
可选的，上述第一指示信息指示相关联的第二参考信号，可以是指示至少一个第二参考信号资源的配置信息，则上述N个接收空间参数与该至少一个第二参考信号资源的全部端口中的M个端口的发送空间参数相关联；或者，上述第一指示信息指示相关联的第二参考信号，是指示至少一个第二参考信号资源集合的配置信息，其中，每个资源集合包括一个或多个资源，则上述N个接收空间参数与该至少一个第二参考信号资源集合包括的第二参考信号资源的全部端口中的M个端口的发送空间参数相关联。也即，上述M个端口可以一个第二参考信号资源的端口，也可以是不同第二参考信号资源的端口。
可选的，可以指示至少一个第二参考信号资源的配置索引，或者，指示至少一个第二参考信号资源集合的配置索引。通过较少的比特数，即可指示出来需要的信息。其中第二参考信号是第二通信装置所发送的上行参考信号。
进而，由上述第一指示信息指示N个接收空间参数时，可以通过下述两种方式中的任意一种来实现：
一种方式中，上述第一指示信息可以指示上述第二参考信号的配置信息，例如，指示配置索引，上述N个接收空间参数与上述M个端口的发送空间参数相关联。
其中，上述N个接收空间参数与上述M个端口的发送空间参数相关联可以指N个接收空间参数由M个端口中全部或部分端口的发送空间参数来确定，或者，M个端口中全部或部分端口的发送空间参数由N个接收空间参数来确定。
例如，上述N个接收空间参数是基于上述M个端口中的M1个端口的发送空间参数确定的，其中，M1小于等于M。又例如，上述M个端口中的M1个端口的发送空间参数是基于N个接收空间参数确定的。
在该方法中，通过第一指示信息指示第二参考信号的配置信息，即可以指示M个端口中的发送空间参数，进而可以根据M个端口的发送空间参数与N个接收空间参数的关联关系得到N个接收空间参数。
示例性的，假设第二通信装置有2个发送天线端口和2个接收天线端口，上述至少一个功率信息定义为所指示的所有接收端口测量到的第一参考信号功率的平均值。在该场景 下，第二通信装置首先通过M＝2个端口发送一个SRS资源，并保存了这M＝2个端口的发送空间参数；其次，第一通信装置发送CSI-RS，并通过第一指示信息指示该SRS资源的配置信息(如资源配置索引)。第二通信装置通过第一指示信息指示的SRS资源的配置信息来读取保存的M＝2个端口的发送空间参数，并根据发送空间参数确定接收CSI-RS需要的N＝2个接收空间参数。即，第二通信装置根据M个端口的发送空间参数确定N个接收空间参数。
进而，第二通信装置可以根据该N个接收空间参数测量第一参考信号的功率信息。例如，如果N个接收空间参数中包括N个端口索引，则第二通信装置可以在该N个端口索引或N个索引中的一部分索引所对应的端口上进行测量。如果N个接收空间参数中包括值为N的端口个数，则第二通信装置可以根据预定义的规则从发送第二参考信号的端口中确定出相应个数的端口进行第一参考信号的功率测量。
另一种方式中，上述第一指示信息指示N个接收空间参数的方式可以是指示相关联的第二参考信号的M个端口中的M1个端口，上述N个接收空间参数与上述M1个端口的发送空间参数相关联，其中，M1为大于等于1并且小于等于M的整数。
指示相关联的第二参考信号可以通过指示至少一个第二参考信号资源来实现，也可以通过指示至少一个第二参考信号资源集合来实现，不再赘述。其中，上述N个接收空间参数与上述M1个端口的发送空间参数相关联可以指N个接收空间参数由M1个端口的发送空间参数来确定，或者，M1个端口的发送空间参数由N个接收空间参数来确定。
例如，上述N个接收空间参数是基于上述M1个端口的发送空间参数确定的。
又例如，上述M1个端口的发送空间参数是基于N个接收空间参数确定的。
在该方法中，通过第一指示信息指示M个端口中的M1个端口，即可以指示M1个端口中每个端口的发送空间参数，进而可以根据M1个端口的发送空间参数与N个接收空间参数的关联关系得到N个接收空间参数。
示例性的，假设第二通信装置有2个发送天线端口和2个接收天线端口，第二通信装置通过M＝2个端口发送一个SRS资源，上述至少一个功率信息的定义是至少一个接收端口中的各接收端口测量的第一参信号功率信息的最大值。则，首先，第一通信装置发送CSI-RS，第二通信装置通过2个端口测量各接收端口对应的第一参考信号功率信息，并取最大值进行上报。同时，第二通信装置上报第一指示信息，用于指示上报的功率信息对应的接收端口索引，即N＝1。其次，第二通信装置通过M＝2个端口发送SRS，并且采用的发送空间参数与接收第一参考信号的接收空间参数相同。第一通信装置通过第一指示信息指示的接收端口索引和预定的对应规则，即可确定发送SRS的2个端口中，应该用哪个端口来测量上行功率信息。
进而，第二通信装置可以根据该N个接收空间参数测量第一参考信号的功率信息。例如，如果N个接收空间参数中包括N个端口索引，则第二通信装置可以在该N个端口索引或N个索引中的一部分索引所对应的端口上进行测量。如果N个接收空间参数中包括值为N的端口个数，则第二通信装置可以根据预定义的规则从发送第二参考信号的端口中确定出相应个数的端口进行第一参考信号的功率测量。
通过指示第二参考信号的配置信息，或者指示M个端口中的M1个端口，第一信息可以准确的指明上述至少一个功率信息是基于哪些接收空间参数测量的，从而使第一通信装置获取测量第二参考信号功率信息时需要基于的发送空间参数，或者，使第二通信装置获 取测量至少一个功率信息时需要基于的接收空间参数。例如，第一通信装置测量M>1个发送端口的第二参考信号，并确定其中的M1个端口的信道质量最好，并基于这M1个端口测量了上行功率信息。则与这M1个端口的发送空间参数相关联的接收空间参数对应的信道质量也可能是最好的，基于这些接收空间参数测量至少一个功率信息，会更加准确。则，第一通信装置可以通过第一指示信息指示第二通信装置在测量第一参考信号的功率信息时，要基于与这M1个端口的发送空间参数相关联的接收空间参数，获得更准确的测量结果。
可选的，上述N个接收空间参数是基于所述M个端口中全部或部分端口的发送空间参数确定的，为N个接收空间参数等于所述M个端口中全部或部分端口的发送空间参数；上述M个端口中全部或部分端口的发送空间参数是基于N个接收空间参数确定的，为M个端口中全部或部分端口的发送空间参数等于N个接收空间参数。其他同理，不再赘述。
通过将N个接收空间参数与M个端口的发送空间参数相关联，使得第一通信装置可以基于自己测量的上行功率信息以及第二通信装置上报的至少一个功率信息确定预编码矩阵，从而可以消除第二通信装置的上行参考信号的发送功率的影响，从而使得确定的预编码矩阵与实际的信道匹配。
在上述实施例中，上述N和上述M之间的关系可以为下述中的任意一种，本申请对此不做具体限制。
此外，第二通信装置接收第一参考信号和发送第二参考信号的先后顺序不做具体限制。
第一通信装置发送第一参考信号和接收第二参考信号的先后顺序不做具体限制。
1、N＝M
一种示例性的场景中，第二通信装置有2个发送天线端口和2个接收天线端口，上述至少一个功率信息定义为所指示的所有接收端口测量到的第一参考信号功率的平均值。则，第二通信装置首先通过M＝2个端口发送一个SRS资源，并保存了这M＝2个端口的发送空间参数；其次，第一通信装置发送CSI-RS，并通过第一指示信息指示该SRS资源的配置信息(如资源索引)。第二通信装置通过第一指示信息指示的SRS资源的配置信息来读取保存的M＝2个端口的发送空间参数，并根据发送空间参数确定接收CSI-RS需要的N＝2个接收空间参数。此时，N＝M。可选的，第i个发送空间参数等于第i个接收空间参数，i＝1,2。
另一种示例性的场景中，第二通信装置有1个发送天线端口和2个接收天线端口，并且不支持SRS天线切换。则第二通信装置固定使用M＝1个端口发送SRS(该SRS为1端口SRS)。此时，第二通信装置测量的功率信息也应该基于该端口测量。此时第一指示信息指示该SRS资源的索引，则N＝1，即N＝M。
2、N<M
一种示例性的场景中，第二通信装置有2个发送天线端口和2个接收天线端口，第二通信装置通过M＝2个端口发送一个SRS资源，上述至少一个功率信息的定义是至少一个接收端口中的各接收端口测量的第一参信号功率信息的最大值。则，首先，第一通信装置发送CSI-RS，第二通信装置通过2个端口测量各接收端口对应的第一参考信号功率信息，并取最大值进行上报。同时，第二通信装置上报第一指示信息，用于指示上报的功率信息对应的接收端口索引，即N＝1。其次，第二通信装置通过M＝2个端口发送SRS，并且采用的发送空间参数与接收第一参考信号的接收空间参数相同。第一通信装置通过第一指示信息 指示的接收端口索引和预定的对应规则，即可确定发送SRS的2个端口中，应该用哪个端口来测量上行功率信息。可选的，通过事先配置上报功率信息与后续发送的SRS资源之间的关联，第一指示信息也可以通过指示SRS的端口索引来指示接收端口索引。此时N<M。
以下示例的场景中，N<M以及N＝M均可。
一种示例性的场景中，第二通信装置有2个发送天线端口和4个接收天线端口，并且不支持SRS天线切换，则第二通信装置固定使用M＝2个端口发送SRS。此时，第二通信装置测量的功率信息也基于该2个端口中的一个或全部端口测量。此时，N＝M＝2，或者，M＝2并且N＝1均可。
另一种示例性的场景中，第二通信装置有2个发送天线端口和4个接收天线端口，并且支持SRS天线切换，则第二通信装置第一次使用M＝2个端口发送一个SRS，第二次使用另外M＝2个端口发送SRS。此时，第二通信装置测量的功率信息可以是基于该4个端口测量的，或者是基于其中2个端口(例如距离本次功率信息上报最近的一次SRS发送所使用的2个端口)测量的，此时，N＝M，或者N<M均可。
基于上述的实施例，在根据上述N个接收空间参数确定上述至少一个功率信息时，可以通过如下方式中的任意一种或其结合来实现。
第一种方式中，上述至少一个功率信息是根据上述N个接收空间参数对应的第一参考信号的功率信息最大值确定的。
在该方式中，第二通信装置根据第一指示信息所指示的N个接收空间参数，测量各接收空间参数对应的第一参考信号的功率信息，并选择最大值确定上述至少一个功率信息。
可选的，第二通信装置可以将所获取到的最大值作为上述至少一个功率信息，或者，第二通信装置还可以对该最大值进行其他计算，将计算的结果作为上述至少一个功率信息。
示例性的，上述对最大值进行其他计算可以是进行加权计算，如计算该最大值与第一预设因子的乘积等。
示例性的，第二通信装置根据第一指示信息所指示的N个接收空间参数测量到N个功率信息，则可以将该N个功率信息中的最大值作为上述至少一个功率信息。
通过第一参考信号的功率信息的最大值确定至少一个功率信息，可以使得第二通信装置选择功率信息测量质量最好(例如，功率取值最大)的功率信息上报，提高至少一个功率信息的测量准确度，有助于准确的消除第二通信装置的上行参考信号的发送功率的影响，使得预编码矩阵更准确。
第二种方式中，上述至少一个功率信息是根据上述N个接收空间参数对应的第一参考信号的功率信息的平均值确定的。
在该方式中，第二通信装置根据第一指示信息所指示的N个接收空间参数，确定各接收空间参数对应的第一参考信号的功率信息的平均值，并根据该平均值确定上述至少一个功率信息。
可选的，上述确定这些功率信息中的平均值，可以是对这些功率信息进行dB域加权平均，或者，也可以是对这些功率信息进行线性域加权平均，本申请实施例对此不做具体限制。
可选的，第二通信装置可以将所获取到的平均值作为上述至少一个功率信息，或者，第二通信装置还可以对该平均值进行其他计算，将计算的结果作为上述至少一个功率信息。
示例性的，上述对平均值进行其他计算，可以是进行加权计算，如计算该平均值与第二预设因子的乘积等。
示例性的，第二通信装置根据第一指示信息所指示的N个接收空间参数测量到N个功率信息，则可以将该N个功率信息的平均值作为上述至少一个功率信息。
通过第一参考信号的功率信息的平均值确定至少一个功率信息，可以降低干扰和噪声对测量精度的影响，提高功率信息的测量准确性。同样的，上行功率参数也可以基于平均值进行测量。这样，有助于更准确的消除第二通信装置的上行参考信号的发送功率的影响，使得预编码矩阵更准确。
第三种方式中，上述至少一个功率信息是根据上述N个接收空间参数对应的第一参考信号的功率信息的求和值确定的。
在该方式中，第二通信装置根据第一指示信息所指示的N个接收空间参数，测量第一参考信号的功率信息，第二通信装置可以确定这些功率信息的求和值，并根据该求和值确定上述至少一个功率信息。
可选的，第二通信装置可以将所获取到的求和值作为上述至少一个功率信息，或者，第二通信装置还可以对该求和值进行加权计算，将计算的结果作为上述至少一个功率信息。
示例性的，第二通信装置根据第一指示信息所指示的N个接收空间参数测量到N个功率信息，则可以将该N个功率信息的求和值作为上述至少一个功率信息。
可选的，在上述三种方式中，第二通信装置在根据上述步骤S204对应的过程确定X DL时，可以首先分别通过公式(4)-公式(5)计算N个接收空间参数对应的每个接收端口的下行功率信息X DL，在此基础上，再对N个接收空间参数对应的多个接收端口的下行功率信息X DL进行相应运算，得到向第一通信装置上报的X DL。
以上述第一种方式为例，第二通信装置首先分别通过公式(4)-公式(5)计算N个接收空间参数对应的每个接收端口的下行功率信息X DL，进而，再选择各X DL中的最大值，将该最大值作为向第一通信装置上报的X DL。
第四种方式中，上述至少一个功率信息包括K个功率信息，其中，第i个功率信息是根据K个接收空间参数中的第i个接收空间参数确定的，上述N个接收空间参数包括所述K个功率信息，i为大于等于1并且小于等于K的整数。
在该方式中，如果K小于N，则在第一指示信息指示了N个接收空间参数后，第二通信装置选择了其中的一部分，即K个接收空间参数所对应的K个功率信息，将该K个功率信息发送给第一通信装置。
如果K等于N，则在第一指示信息指示了N个接收空间参数后，第二通信装置获取该N个接收空间参数所对应的N个功率信息，将该N个功率信息发送给第一通信装置。
第四种方式可以解决第二通信装置的多个发送端口的幅度校准不精确造成的问题。例如，第二通信装置有2个发送端口和2个接收端口，其中，2个接收端口对接收信号的幅度增益相同，而2个发送端口对发送信号的幅度增益不同。则第一通信装置需要针对2个发送端口分别获取各自的E tx/E srs,l，其中l表示发送端口索引，l＝1或l＝2。为了获得每个端口的E tx/E srs,l，第二通信装置需要针对每个接收端口测量并反馈功率信息X DL,l。第一通信装置通过测量2个发送端口对应的X UL,l，即可根据前述方法确定E tx/E srs,l，从而根据SRS获得的信道估计结果来确定计算预编码矩阵需要的信道矩阵信息。可选的，在上述各方式中， 第一参考信号的功率信息可以为第一参考信号在L个时间单元内占用的时频资源上的功率信息的加权求和值，其中，L为正整数。
通过在至少一个功率信息中包括K个功率信息，可以解决第二通信装置的多个发送空间参数的幅度校准不精确造成的问题。以发送空间参数为发送天线端口、接收空间参数为接收天线端口为例，当第二通信装置通过多个接收端口接收数据时，第一通信装置需要获得准确的多个接收端口的信道的相对增益。当不同的接收端口的信道是通过不同发送端口发送上行参考信号获得时，不同发送端口的幅度校准不精确就会导致不同接收端口的信道的测量收到不准确幅度校准的影响，导致不同接收端口的信道的相对增益不准确。
此时，通过第二通信装置单独测量不同接收空间参数对应的功率信息并上报给第一通信装置，同时，第一通信装置测量不同发送空间参数对应的上行功率信息，第一通信装置就可以通过校正不同发送端口发送功率校准不精确带来的问题，消除不同发送端口发送功率带来的影响，使得预编码矩阵更准确。
另一实施例中，第二通信装置可以根据第一通信装置的指示确定是否发送上述至少一个功率信息。
可选的，第一通信装置可以向第二通信装置发送第一配置信息，该第一配置信息用于指示至少一个功率信息的相关配置参数。可选的，配置参数包括功率信息对应的频域带宽，也可以包括上述K的取值，还可以包括相关联的第二参考信号配置信息的指示字段。本申请不做限制。
可选的，当第二通信装置接收到上述第一配置信息之后，可以根据上述第一指示信息的指示对第一参考信号的功率信息进行测量，并向第一通信装置发送上述至少一个功率信息。
可选的，第一通信装置在发送上述第一配置信息时，可以在第一配置信息中携带上述第一指示信息，即上述第一配置信息中包含上述第一指示信息。
可选的，上述第一指示信息也可以包含在其他的消息或信息中，例如，上述第一指示信息可以通过第三配置信息进行发送，本申请实施例对此不做具体限制。可选的，上述第一指示信息可以通过RRC、MAC CE或DCI信令中的至少一个进行承载。示例性的，假设上述第一指示信息包含在上述第一配置信息中，上述第一配置信息可以通过RRC信令进行承载。
另一实施例中，第二通信装置还可以发送第二指示信息，该第二指示信息用于指示上述第二通信装置的接收机类型。
一种可选方式中，上述接收机类型用于指示上述第二通信装置为线性接收机或非线性接收机。
另一种可选方式中，上述接收机类型用于指示线性接收机的类型，包括最大比合并接收机MRC、最小均方误差接收机MMSE-IRC等。例如，通过1比特表示线性接收机的类型。可选的，0表示MRC接收机，1表示MMSE-IRC接收机。
另一种可选方式中，上述接收机类型用于指示接收机的类型，包括MRC、MMSE-IRC和最小均方误差串行干扰消除接收机MMSE-SIC等。例如，通过2比特表示线性接收机的类型。可选的，00表示MRC接收机，01表示MMSE-IRC接收机，10表示MMSE-SIC接收机。
再一种可选方式中，上述接收机类型用于指示接收机复杂度。通过接收机复杂度可以推断接收机类型。
在通过上述图1所示的过程确定预编码矩阵时，需要终端设备参与迭代过程，即需要终端设备多次发送SRS，导致***低复杂度过高。
以上述第一通信装置为网络设备，第二通信装置为终端设备为例，在本实施例中，通过终端设备向网络设备发送接收机类型，可以使得网络设备可以自行执行多次迭代，避免终端设备多次发送SRS，降低终端设备的复杂度，大幅度提高迭代速度，从而使得迭代优化的性能增益得以实现。
上述本申请提供的实施例中，分别从第一通信装置、第二通信装置、以及第一通信装置和第二通信装置之间交互的角度对本申请实施例提供的方法进行了介绍。为了实现上述本申请实施例提供的方法中的各功能，第一通信装置和第二通信装置可以包括硬件结构和/或软件模块，以硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各功能。上述各功能中的某个功能以硬件结构、软件模块、还是硬件结构加软件模块的方式来执行，取决于技术方案的特定应用和设计约束条件。
图4为本申请实施例提供的一种通信装置的模块结构图，该装置可以为第二通信装置，也可以为能够支持第二通信装置实现本申请实施例提供的方法中的第二通信装置的功能的装置，例如该装置可以是第二通信装置中的装置或芯片***，如图4所示，该装置包括：接收模块401、处理模块402和发送模块403。在本申请实施例中，芯片***可以由芯片构成，也可以包含芯片和其他分立器件。
处理模块402，用于获取第一指示信息。
接收模块401，用于接收第一参考信号。
发送模块403，用于发送所述第一参考信号的至少一个功率信息，所述至少一个功率信息是根据所述第一指示信息指示的接收空间参数确定的，所述接收空间参数包括所述第二通信装置的第一天线参数。
在一个可能的设计中，所述功率信息是根据信号的接收功率确定的参数。所述功率信息可以为RSRP、RSRQ、RSSI或者接收幅度信息，也可以由RSRP、RSRQ、RSSI以及接收幅度信息中的至少一项确定。
在一个可能的设计中，所述第一天线参数包括所述第二通信装置测量所述功率信息的天线端口信息。
在一个可能的设计中，所述接收空间参数还包括接收空间滤波参数。
在一个示例中，所述接收空间滤波参数可以为spatial Rx parameter。
在一个可能的设计中，处理模块402具体用于：
通过发送模块403发送所述第一指示信息，或者，通过接收模块401接收所述第一指示信息。
在一个可能的设计中，所述第一指示信息指示N个接收空间参数；
所述至少一个功率信息是根据所述第一指示信息指示的接收空间参数确定的，包括：
所述至少一个功率信息是根据所述N个接收空间参数确定的。
在一个可能的设计中，处理模块402还用于：
获取第二参考信号的配置信息，所述第二参考信号包括M个端口，所述M个端口中不 同端口的发送空间参数不同。
在一个可能的设计中，所述发送空间参数包括第二天线参数和/或发送空间滤波参数，所述第二天线参数包括所述第二通信装置发送所述第二参考信号的天线端口信息。
在一个可能的设计中，所述第一指示信息指示N个接收空间参数，可以为指示第二通信装置的接收端口信息，或者，指示相关联的参考信号。
在一个示例中，上述指示相关联的参考信号，可以是指示至少一个第二参考信号资源的配置信息，或者，还可以是指示至少一个第二参考信号资源集合的配置信息。
在一个可能的设计中，若所述第一指示信息指示相关联的参考信号，则所述第一指示信息指示N个接收空间参数，包括：
所述第一指示信息指示所述第二参考信号的配置信息，所述N个接收空间参数与所述M个端口的发送空间参数相关联；
或者，
所述第一指示信息用于指示所述M个端口中的M1个端口，所述N个接收空间参数与所述M1个端口的发送空间参数相关联，1<＝M1<＝M。
在一个示例中，所述N个接收空间参数与所述M个端口的发送空间参数相关联，包括：
所述N个接收空间参数是基于所述M个端口中全部或部分端口的发送空间参数确定的，或者，
所述M个端口中全部或部分端口的发送空间参数是基于N个接收空间参数确定的。
在一个示例中，所述N个接收空间参数与所述M1个端口的发送空间参数相关联，包括：
所述N个接收空间参数是基于所述M1个端口的发送空间参数确定的，或者，
所述M1个端口的发送空间参数是基于N个接收空间参数确定的。
在一个示例中，所述至少一个功率信息是根据所述N个接收空间参数确定的，包括：
所述至少一个功率信息是根据所述N个接收空间参数对应的第一参考信号的功率信息的最大值确定的。
在一个示例中，所述至少一个功率信息是根据所述N个接收空间参数确定的，包括：
所述至少一个功率信息是根据所述N个接收空间参数对应的第一参考信号的功率信息的平均值确定的。
在一个示例中，所述至少一个功率信息是根据所述N个接收空间参数确定的，包括：
所述至少一个功率信息包括K个功率信息，其中，第i个功率信息是根据K个接收空间参数中的第i个接收空间参数确定的，所述N个接收空间参数包括所述K个功率信息，i大于等于1并且小于等于K。
在一个示例中，所述至少一个功率信息是根据所述N个接收空间参数确定的，包括：
所述至少一个功率信息是根据所述N个接收空间参数对应的第一参考信号的功率信息的求和值确定的。
在一个可能的设计中，接收模块401还用于：
接收第一配置信息，所述第一配置信息用于指示所述第二通信装置发送所述至少一个功率信息。
在一个可能的设计中，发送模块403还用于：
发送第二指示信息，所述第二指示信息用于指示所述第二通信装置的接收机类型。
在一个可能的设计中，所述第一参考信号的功率信息为所述第一参考信号在L个时间单元内占用的时频资源上的功率信息的加权求和值，L为正整数。
在一个可能的设计中，接收模块401还用于：
接收第二配置信息，所述第二配置信息用于指示所述N。
图5为本申请实施例提供的另一种通信装置的模块结构图，该装置可以为第一通信装置，也可以为能够支持第一通信装置实现本申请实施例提供的方法中的第一通信装置的功能的装置，例如该装置可以是第一通信装置中的装置或芯片***，如图5所示，该装置包括：发送模块501、处理模块502和接收模块503。在本申请实施例中，芯片***可以由芯片构成，也可以包含芯片和其他分立器件。
处理模块502，用于获取第一指示信息。
发送模块501，用于发送第一参考信号。
接收模块503，用于接收所述第一参考信号的至少一个功率信息，所述至少一个功率信息是根据所述第一指示信息指示的接收空间参数确定的，所述接收空间参数包括所述第二通信装置的第一天线参数。
在一个可能的设计中，所述功率信息是根据信号的接收功率确定的参数。所述功率信息可以为RSRP、RSRQ、RSSI或者接收幅度信息，也可以由RSRP、RSRQ、RSSI以及接收幅度信息中的至少一项确定。
在一个可能的设计中，所述第一天线参数包括所述第二通信装置测量所述功率信息的天线端口信息。
在一个可能的设计中，所述接收空间参数还包括接收空间滤波参数。
在一个示例中，所述接收空间滤波参数可以为spatial Rx parameter。
在一个可能的设计中，处理模块502具体用于：
通过发送模块501发送所述第一指示信息，或者，通过接收模块503接收所述第一指示信息。
在一个可能的设计中，所述第一指示信息指示N个接收空间参数；
所述至少一个功率信息是根据所述第一指示信息指示的接收空间参数确定的，包括：
所述至少一个功率信息是根据所述N个接收空间参数确定的。
在一个可能的设计中，发送模块501还用于：
发送第二参考信号的配置信息，所述第二参考信号包括M个端口，所述M个端口中不同端口的发送空间参数不同。
在一个可能的设计中，所述发送空间参数包括第二天线参数和/或发送空间滤波参数，所述第二天线参数包括所述第二通信装置发送所述第二参考信号的天线端口信息。
在一个可能的设计中，所述第一指示信息指示N个接收空间参数，可以为指示第二通信装置的接收端口信息，或者，指示相关联的参考信号。
在一个示例中，上述指示相关联的参考信号，可以是指示至少一个第二参考信号资源的配置信息，或者，还可以是指示至少一个第二参考信号资源集合的配置信息。
在一个可能的设计中，若所述第一指示信息指示相关联的参考信号，则所述第一指示信息指示N个接收空间参数，包括：
所述第一指示信息指示所述第二参考信号的配置信息，所述N个接收空间参数与所述M个端口的发送空间参数相关联；
或者，
所述第一指示信息用于指示所述M个端口中的M1个端口，所述N个接收空间参数与所述M1个端口的发送空间参数相关联，1<＝M1<＝M。
在一个示例中，所述N个接收空间参数与所述M个端口的发送空间参数相关联，包括：
所述N个接收空间参数是基于所述M个端口中全部或部分端口的发送空间参数确定的，或者，
所述M个端口中全部或部分端口的发送空间参数是基于N个接收空间参数确定的。
在一个示例中，所述N个接收空间参数与所述M1个端口的发送空间参数相关联，包括：
所述N个接收空间参数是基于所述M1个端口的发送空间参数确定的，或者，
所述M1个端口的发送空间参数是基于N个接收空间参数确定的。
在一个示例中，所述至少一个功率信息是根据所述N个接收空间参数确定的，包括：
所述至少一个功率信息是根据所述N个接收空间参数对应的第一参考信号的功率信息的最大值确定的。
在一个示例中，所述至少一个功率信息是根据所述N个接收空间参数确定的，包括：
所述至少一个功率信息是根据所述N个接收空间参数对应的第一参考信号的功率信息的平均值确定的。
在一个示例中，所述至少一个功率信息是根据所述N个接收空间参数确定的，包括：
所述至少一个功率信息包括K个功率信息，其中，第i个功率信息是根据K个接收空间参数中的第i个接收空间参数确定的，所述N个接收空间参数包括所述K个功率信息，i大于等于1并且小于等于K。
在一个示例中，所述至少一个功率信息是根据所述N个接收空间参数确定的，包括：
所述至少一个功率信息是根据所述N个接收空间参数对应的第一参考信号的功率信息的求和值确定的。
在一个可能的设计中，发送模块501还用于：
发送第一配置信息，所述第一配置信息用于指示所述第二通信装置发送所述至少一个功率信息。
在一个可能的设计中，接收模块503还用于：
接收第二指示信息，所述第二指示信息用于指示所述第二通信装置的接收机类型。
在一个可能的设计中，所述第一参考信号的功率信息为所述第一参考信号在L个时间单元内占用的时频资源上的功率信息的加权求和值，L为正整数。
在一个可能的设计中，发送模块501还用于：
发送第二配置信息，所述第二配置信息用于指示所述N。
本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，另外，在本申请各个实施例中的各功能模块可以集成在一个处理器中，也可以是单独物理存在，也可以两个或两个以上模块集成在一个模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。
如图6所示为本申请实施例提供的装置600，用于实现上述方法中第二通信装置的功能。该装置可以是第二通信装置，也可以是能够支持第二通信装置实现本申请实施例提供的方法中的第二通信装置的功能的装置。其中，该装置可以为芯片***。装置600包括至少一个处理器620，用于实现本申请实施例提供的方法中第二通信装置的功能。示例性地，处理器620可以获取第一指示信息，具体参见方法示例中的详细描述，此处不做赘述。
装置600还可以包括至少一个存储器630，用于存储程序指令和/或数据。存储器630和处理器620耦合。本申请实施例中的耦合是装置、单元或模块之间的间接耦合或通信连接，可以是电性，机械或其它的形式，用于装置、单元或模块之间的信息交互。处理器620可能和存储器630协同操作。处理器620可能执行存储器630中存储的程序指令。所述至少一个存储器中的至少一个可以包括于处理器中。
装置600还可以包括通信接口610，用于通过传输介质和其它设备进行通信，从而用于装置600中的装置可以和其它设备进行通信。在本申请实施例中，通信接口可以是能够进行通信的任意形式的接口，如模块、电路、总线或其组合等。可选的，该通信接口610可以为收发器。示例性地，该其它设备可以是第一通信装置。处理器620利用通信接口610收发数据，并用于实现上述方法实施例中所述的第二通信装置所执行的方法。
本申请实施例中不限定上述通信接口610、处理器620以及存储器630之间的具体连接介质。本申请实施例在图6中以存储器630、处理器620以及通信接口610之间通过总线640连接，总线在图6中以粗线表示，其它部件之间的连接方式，仅是进行示意性说明，并不引以为限。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图6中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
如图7所示为本申请实施例提供的装置700，用于实现上述方法中第一通信装置的功能。该装置可以是第一通信装置，也可以是能够支持第一通信装置实现本申请实施例提供的方法中的第一通信装置的功能的装置。其中，该装置可以为芯片***。装置700包括至少一个处理器720，用于实现本申请实施例提供的方法中第一通信装置的功能。示例性地，处理器720可以获取第一指示信息，具体参见方法示例中的详细描述，此处不做赘述。
装置700还可以包括至少一个存储器730，用于存储程序指令和/或数据。存储器730和处理器720耦合。本申请实施例中的耦合是装置、单元或模块之间的间接耦合或通信连接，可以是电性，机械或其它的形式，用于装置、单元或模块之间的信息交互。处理器720可能和存储器730协同操作。处理器720可能执行存储器730中存储的程序指令。所述至少一个存储器中的至少一个可以包括于处理器中。
装置700还可以包括通信接口710，用于通过传输介质和其它设备进行通信，从而用于装置700中的装置可以和其它设备进行通信。在本申请实施例中，通信接口可以是能够进行通信的任意形式的接口，如模块、电路、总线或其组合等。可选的，该通信接口710可以为收发器。示例性地，该其它设备可以是第二通信装置。处理器720利用通信接口710收发数据，并用于实现上述方法实施例中所述的第一通信装置所执行的方法。
本申请实施例中不限定上述通信接口710、处理器720以及存储器730之间的具体连接介质。本申请实施例在图7中以存储器730、处理器720以及通信接口710之间通过总线740连接，总线在图7中以粗线表示，其它部件之间的连接方式，仅是进行示意性说明，并不引以为限。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图7 中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
在本申请实施例中，处理器可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件，可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。
在本申请实施例中，存储器可以是非易失性存储器，比如硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)等，还可以是易失性存储器(volatile memory)，例如随机存取存储器(random-access memory，RAM)。存储器是能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。本申请实施例中的存储器还可以是电路或者其它任意能够实现存储功能的装置，用于存储程序指令和/或数据。
本申请实施例提供的方法中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本发明实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、网络设备、用户设备或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，简称DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机可以存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，数字视频光盘(digital video disc，简称DVD))、或者半导体介质(例如,SSD)等。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (32)

  1. 一种通信方法，其特征在于，包括：
    第二通信装置获取第一指示信息；
    所述第二通信装置接收第一参考信号；
    所述第二通信装置发送所述第一参考信号的至少一个功率信息，所述至少一个功率信息是根据所述第一指示信息指示的接收空间参数确定的，所述接收空间参数包括所述第二通信装置的第一天线参数。
  2. 根据权利要求1所述的方法，其特征在于，
    所述第一天线参数包括所述第二通信装置测量所述功率信息的天线端口信息。
  3. 根据权利要求1或2所述的方法，其特征在于，
    所述接收空间参数还包括接收空间滤波参数。
  4. 根据权利要求1-3任一所述的方法，其特征在于，所述第二通信装置获取第一指示信息，包括：
    所述第二通信装置发送所述第一指示信息，或者，所述第二通信装置接收所述第一指示信息。
  5. 根据权利要求1-4所述的方法，其特征在于，所述第一指示信息指示N个接收空间参数；
    所述至少一个功率信息是根据所述第一指示信息指示的接收空间参数确定的，包括：
    所述至少一个功率信息是根据所述N个接收空间参数确定的。
  6. 根据权利要求5所述的方法，其特征在于，还包括：
    第二通信装置获取第二参考信号的配置信息，所述第二参考信号包括M个端口，所述M个端口中不同端口的发送空间参数不同。
  7. 根据权利要求6所述的方法，其特征在于，所述第一指示信息指示N个接收空间参数，包括：
    所述第一指示信息指示所述第二参考信号的配置信息，所述N个接收空间参数与所述M个端口的发送空间参数相关联；
    或者，
    所述第一指示信息用于指示所述M个端口中的M1个端口，所述N个接收空间参数与所述M1个端口的发送空间参数相关联，1<＝M1<＝M。
  8. 根据权利要求5-7任一项所述的方法，其特征在于，所述至少一个功率信息是根据所述N个接收空间参数确定的，包括：
    所述至少一个功率信息是根据所述N个接收空间参数对应的第一参考信号的功率信息的最大值确定的。
  9. 根据权利要求5-7任一项所述的方法，其特征在于，所述至少一个功率信息是根据所述N个接收空间参数确定的，包括：
    所述至少一个功率信息是根据所述N个接收空间参数对应的第一参考信号的功率信息的平均值确定的。
  10. 根据权利要求5-7任一项所述的方法，其特征在于，所述至少一个功率信息是根据所述N个接收空间参数确定的，包括：
    所述至少一个功率信息包括K个功率信息，其中，第i个功率信息是根据K个接收空间参数中的第i个接收空间参数确定的，所述N个接收空间参数包括所述K个功率信息，1<＝i<＝K。
  11. 根据权利要求1-10任一项所述的方法，其特征在于，还包括：
    所述第二通信装置接收第一配置信息，所述第一配置信息用于指示所述第二通信装置发送所述至少一个功率信息。
  12. 根据权利要求1-11任一项所述的方法，其特征在于，还包括：
    所述第二通信装置发送第二指示信息，所述第二指示信息用于指示所述第二通信装置的接收机类型。
  13. 一种通信方法，其特征在于，包括：
    第一通信装置获取第一指示信息；
    所述第一通信装置发送第一参考信号；
    所述第一通信装置接收所述第一参考信号的至少一个功率信息，所述至少一个功率信息是根据所述第一指示信息指示的接收空间参数确定的，所述接收空间参数包括接收所述第一参考信号的第二通信装置的第一天线参数。
  14. 根据权利要求13所述的方法，其特征在于，所述第一天线参数包括所述第二通信装置测量所述功率信息的天线端口信息。
  15. 根据权利要求13或14所述的方法，其特征在于，所述接收空间参数还包括接收空间滤波参数。
  16. 根据权利要求13-15任一项所述的方法，其特征在于，所述第一通信装置获取第一指示信息，包括：
    所述第一通信装置接收所述第一指示信息，或者，所述第一通信装置发送所述第一指示信息。
  17. 根据权利要求13-16任一项所述的方法，其特征在于，所述第一指示信息指示N个接收空间参数；
    所述至少一个功率信息是根据所述第一指示信息指示的接收空间参数确定的，包括：
    所述至少一个功率信息是根据所述N个接收空间参数确定的。
  18. 根据权利要求17所述的方法，其特征在于，还包括：
    所述第一通信装置发送第二参考信号的配置信息，所述二参考信号包括M个端口，所述M个端口中不同端口的发送空间参数不同。
  19. 根据权利要求18所述的方法，其特征在于，所述第一指示信息指示N个接收空间参数，包括：
    所述第一指示信息指示所述第二参考信号的配置信息，所述N个接收空间参数与所述M个端口的发送空间参数相关联；
    或者，
    所述第一指示信息用于指示所述M个端口中的M1个端口，所述N个接收空间参数与所述M1个端口的发送空间参数相关联，1<＝M1<＝M。
  20. 根据权利要求17-19任一项所述的方法，其特征在于，所述至少一个功率信息是根据所述N个接收空间参数确定的，包括：
    所述至少一个功率信息是根据所述N个接收空间参数对应的第一参考信号的功率信息的最大值确定的。
  21. 根据权利要求17-19任一项所述的方法，其特征在于，所述至少一个功率信息是 根据所述N个接收空间参数确定的，包括：
    所述至少一个功率信息是根据所述N个接收空间参数对应的第一参考信号的功率信息的平均值确定的。
  22. 根据权利要求17-19任一项所述的方法，其特征在于，所述至少一个功率信息是根据所述N个接收空间参数确定的，包括：
    所述至少一个功率信息包括K个功率信息，其中，第i个功率信息是根据K个接收空间参数中的第i个接收空间参数确定的，所述N个接收空间参数包括所述K个功率信息，1<＝i<＝K。
  23. 根据权利要求13-22所述的方法，其特征在于，还包括：
    所述第一通信装置发送第一配置信息，所述第一配置信息用于指示所述第二通信装置上报所述功率信息。
  24. 根据权利要求13-23所述的方法，其特征在于，还包括：
    所述第一通信装置接收第二指示信息，所述第二指示信息用于指示所述第二通信装置的接收机类型。
  25. 一种通信装置，其特征在于，用于实现权利要求1-12任一项所述的方法。
  26. 一种通信装置，其特征在于，用于实现权利要求13-24任一项所述的方法。
  27. 一种通信装置，其特征在于，包括：存储器和处理器；
    所述处理器用于与所述存储器耦合，读取并执行所述存储器中存储的指令，以实现权利要求1-12任一项所述的方法。
  28. 一种通信装置，其特征在于，包括：存储器和处理器；
    所述处理器用于与所述存储器耦合，读取并执行所述存储器中存储的指令，以实现权利要求13-24任一项所述的方法。
  29. 一种芯片***，其特征在于，包括至少一个通信接口，至少一个处理器，至少一个存储器，用于实现权利要求1-12任一项所述的方法，或者用于实现权利要求13-24任一项所述的方法。
  30. 一种通信***，其特征在于，包括权利要求25所述的通信装置和权利要求26所述的通信装置，或者包括权利要求27所述的通信装置和权利要求28所述的通信装置。
  31. 一种计算机程序产品，其特征在于，所述计算机程序产品包括计算机程序代码，当所述计算机程序代码被计算机执行时，使得所述计算机执行权利要求1-12任一项所述的方法，或者使得所述计算机执行权利要求13-24任一项所述的方法。
  32. 一种计算机可读存储介质，其特征在于，所述计算机存储介质存储有计算机指令，当所述计算机指令被计算机执行时，使得所述计算机执行权利要求1-12任一项所述的方法，或者使得所述计算机执行权利要求13-24任一项所述的方法的指令。
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