WO2018232832A1 - Procédé et dispositif de détermination d'un nombre de couches mimo - Google Patents

Procédé et dispositif de détermination d'un nombre de couches mimo Download PDF

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Publication number
WO2018232832A1
WO2018232832A1 PCT/CN2017/094764 CN2017094764W WO2018232832A1 WO 2018232832 A1 WO2018232832 A1 WO 2018232832A1 CN 2017094764 W CN2017094764 W CN 2017094764W WO 2018232832 A1 WO2018232832 A1 WO 2018232832A1
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WIPO (PCT)
Prior art keywords
terminal
network device
scheduled
mimo
message
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PCT/CN2017/094764
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English (en)
Chinese (zh)
Inventor
程勇
方平
李小仙
庞高昆
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华为技术有限公司
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Priority to CN201780048601.1A priority Critical patent/CN109565306B/zh
Publication of WO2018232832A1 publication Critical patent/WO2018232832A1/fr

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    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a method and apparatus for determining the number of MIMO layers.
  • 5G mobile communication systems In order to increase system bandwidth and data transmission rate, 5G mobile communication systems consider the use of high frequency (HF) carrier frequency bands, for example, using frequencies around 30 GHz (such as 24.25 GHz - 52.6 GHz) and around 70 GHz (such as 66 GHz - 86 GHz). .
  • HF high frequency
  • the high frequency band can provide a very high system bandwidth
  • the propagation path loss of the high frequency signal is very large, which limits the transmission distance of the high frequency signal, thereby limiting the coverage of the network device using the high frequency band.
  • beam forming technology and multi-input multiple-output (MIMO) technology will be used in 5G communication systems.
  • High-frequency signals for example, 70 GHz radio wave signals
  • TRP transmission and reception point
  • UE 5G User Equipment
  • the channel matrix is low-rank, thus limiting the number of MIMO layers that the network device schedules for the terminal.
  • data may be transmitted to one terminal by means of joint transmission of multiple network devices.
  • two TRPs can be used to send data to one UE. Since multiple TRPs are spatially separated, the channel variation between each TRP and the terminal is irrelevant, which brings spatial diversity gain to the terminal and can provide multiple layers of MIMO transmission for the terminal. Significantly increase the data transfer rate.
  • each network device independently performs resource scheduling.
  • the sum of the number of MIMO layers scheduled by the multiple network devices on the same time-frequency resource or partially overlapping time-frequency resources may be Exceeding the maximum number of MIMO layers that the terminal can handle, the terminal cannot handle all MIMO layers transmitted to the terminal.
  • Solution 1 In order to avoid the sum of the number of MIMO layers independently scheduled by UE1 for UE1 exceeds the maximum number of MIMO layers that one UE1 can handle, it can be static or semi-static through the upper layer (for example, L3/RRC). (semi-static) Configure the number of MIMO layers that each network device can schedule for UE1. However, this configuration method cannot fully utilize the channel change condition to maximize the system spectrum efficiency and increase the user data transmission rate.
  • Solution 2 When UE1 finds that the sum of the number of MIMO layers independently scheduled by UE1 for UE1 exceeds the maximum number of MIMO layers that can be processed by itself, UE1 discards processing part of the MIMO layer. However, this is likely to cause UE1 to fail to correctly decode a codeword and also waste downstream channel resources.
  • the present application provides a method and a device for determining the number of MIMO layers, which are used to solve the problem that the sum of the number of MIMO layers independently scheduled by multiple network devices exceeds the maximum number of MIMO layers that the terminal can process, and the terminal cannot process the terminal.
  • the present application provides a method for determining a MIMO layer number, including: determining, by a terminal, a maximum number of MIMO layers that can be scheduled by a terminal for a K network device serving a terminal; and determining, by the terminal, an i-th network
  • the terminal sends the first message modulated by the first modulation mode to the i th network device, so that the i th network device is scheduled by the terminal.
  • the MIMO layer number adjusts the first preset value; when the terminal determines that the MIMO layer number adjustment amount corresponding to the ith network device is less than or equal to the second preset value, the terminal sends the second message modulated by the first modulation mode to
  • the i-th network device adjusts the second preset value by the number of MIMO layers scheduled by the i-th network device for the terminal.
  • the sum of the maximum number of MIMO layers that can be scheduled by the K network devices is less than or equal to the maximum number of MIMO layers that the terminal can process, and K is a positive integer greater than or equal to 2.
  • the MIMO layer number adjustment amount corresponding to the i-th network device is determined by the terminal according to the MIMO layer number scheduled by the i-th network device known by the terminal and the maximum number of MIMO layers that the i-th network device can schedule for the terminal,
  • the first preset value is a positive integer
  • the second preset value is a negative integer
  • the i-th network device is any one of the K network devices
  • i is a positive integer less than or equal to K.
  • the terminal can avoid the overhead of the backhaul link and reduce the low delay requirement for the backhaul link, and solves the problem that the terminal cannot handle all the MIMO layers transmitted to the terminal. And indicating, by the foregoing method, that the network device adjusts the number of MIMO layers scheduled for the terminal does not increase the uplink communication overhead.
  • the terminal determines the MIMO layer number adjustment corresponding to the i-th network device.
  • the terminal sends the first message or the second message modulated by the second modulation mode to the i-th network device, so that the i-th network device is not adjusted to The number of MIMO layers scheduled by the terminal.
  • the terminal when the network device does not need to adjust the number of MIMO layers scheduled by the terminal, the terminal notifies the network device to adjust the number of MIMO layers scheduled for the terminal by changing the modulation mode.
  • the second message when the first message is an ACK message, the second message may be a NACK message, when the first message is a NACK message, the second message is an ACK message; when the first modulation mode is a binary phase shift
  • the second modulation mode when keying BPSK, the second modulation mode may be orthogonal binary phase shift keying QBPSK, when the first modulation mode is In QBPSK, the second modulation method is BPSK.
  • the first message, the second message, the first modulation mode, and the second modulation mode provide a combination of multiple implementation manners, and the implementation manner is flexible and convenient.
  • the terminal when the terminal determines that the K network devices serving the terminal respectively correspond to the maximum number of MIMO layers that can be scheduled by the terminal, the terminal performs channel estimation according to the reference signals respectively sent by the K network devices. As a result, the maximum number of MIMO layers that can be scheduled for the terminal by the K network devices is determined; if the terminal determines that the total of the maximum number of MIMO layers that can be scheduled by the K network devices is greater than the MIMO layer that the terminal can process. The maximum value, the terminal re-determines the maximum number of MIMO layers that the K network devices can respectively schedule for the terminal according to a preset algorithm.
  • the method provided by the present application ensures that the sum of the maximum number of MIMO layers that can be scheduled for the terminal of the K network devices is less than or equal to the maximum number of MIMO layers that the terminal can process, and the terminal can not process the transmission to the terminal.
  • the number of MIMO layers scheduled by the i-th network device for the terminal is the number of MIMO layers scheduled by the i-th network device for the terminal or the i-th network determined by the terminal last time.
  • the number of MIMO layers scheduled by the terminal for each network device in the embodiment of the present application may have multiple possible values, and the implementation manner is flexible and convenient.
  • the present application provides a method for determining a number of MIMO layers, including: determining, by a terminal, a maximum number of MIMO layers that can be scheduled by a terminal for a K network device serving a terminal; and performing a terminal to the K network devices.
  • the S network devices respectively send corresponding MIMO layer number adjustment information, S ⁇ K; wherein, the total of the maximum number of MIMO layers that can be scheduled by the K network devices is less than or equal to the number of MIMO layers that the terminal can process
  • K is a positive integer greater than or equal to 2
  • the MIMO layer number adjustment information corresponding to the jth network device carries the maximum number of MIMO layers that the jth network device can schedule for the terminal or the MIMO corresponding to the jth network device
  • the number of layers adjusted, the MIMO layer number adjustment corresponding to the jth network device is the number of MIMO layers scheduled by the terminal according to the jth network device known by the terminal, and the number of MIMO layers that the jth network device can schedule for the terminal
  • the maximum value determines that the jth network device is any one of the S network devices.
  • the method provided by the present application can adapt to the dynamic change of the wireless channel, improve the spectrum efficiency, and support multiple network devices in the scenario of joint transmission of multiple network devices, and the number of MIMO layers independently scheduled by the terminal, and multiple The sum of the number of MIMO layers independently scheduled by the network device for the terminal does not exceed the maximum number of MIMO layers that the terminal can process, and the overhead of the backhaul link and the requirement for low delay of the backhaul link can be avoided.
  • the number of MIMO layers scheduled by the jth network device for the terminal is the number of MIMO layers scheduled by the jth network device for the terminal or the jth network determined by the terminal last time.
  • the number of MIMO layers scheduled by the terminal for each network device in the embodiment of the present application may have multiple possible values, and the implementation manner is flexible and convenient.
  • the terminal when the terminal determines that the K network devices serving the terminal respectively correspond to the maximum number of MIMO layers that can be scheduled by the terminal, the terminal performs channel estimation according to the reference signals respectively sent by the K network devices. As a result, the maximum number of MIMO layers that can be scheduled for the terminal by the K network devices is determined; if the terminal determines that the total of the maximum number of MIMO layers that can be scheduled by the K network devices is greater than the MIMO layer that the terminal can process. The maximum number, the terminal re-determines K network devices according to a preset algorithm The corresponding maximum number of MIMO layers that can be scheduled for the terminal.
  • the method provided by the present application ensures that the sum of the maximum number of MIMO layers that can be scheduled for the terminal of the K network devices is less than or equal to the maximum number of MIMO layers that the terminal can process, and the terminal can not process the transmission to the terminal.
  • the terminal when the terminal separately sends the corresponding MIMO layer number adjustment information to the S network devices of the K network devices, the terminal respectively sends a corresponding acknowledgement ACK message or non-acknowledgement NACK message to the S network devices.
  • the ACK message or the NACK message corresponding to the jth network device carries the maximum number of MIMO layers that the jth network device can schedule for the terminal or the MIMO layer number adjustment corresponding to the jth network device.
  • the method provided by the embodiment of the present application can save the uplink overhead by using the original ACK message and the NACK message to carry the MIMO layer number adjustment amount without adding a new message format and type.
  • the terminal may separately send corresponding MIMO layer number adjustment information to the S network devices on the dedicated physical uplink control channel PUCCH resource; or, the terminal may use the medium access control control element MAC CE to the S The network device separately transmits corresponding MIMO layer number adjustment information.
  • the terminal can send the MIMO layer number adjustment message to the network device in multiple forms, and the implementation manner is flexible and convenient.
  • the S network devices include a network device that the terminal has not sent the maximum number of MIMO layers that can be scheduled for the terminal, and the number of MIMO layers that the terminal knows for the terminal and the terminal can determine as the terminal.
  • the network device that is known by the terminal to be the number of MIMO layers scheduled by the terminal and the maximum number of MIMO layers that the terminal can determine for the terminal to be scheduled is the network device to which the terminal has transmitted the maximum number of MIMO layers that can be scheduled for the terminal.
  • the terminal does not change according to the maximum number of MIMO layers that the network device can determine for the terminal, and the known number of MIMO layers that the network device schedules for the terminal, so the terminal can adjust the network device without notifying the network device.
  • the number of MIMO layers scheduled for the terminal that is, the corresponding MIMO layer number adjustment information is not sent to the network device, so as to save uplink communication overhead. Therefore, the terminal may choose to separately send corresponding MIMO layer number adjustment information to all K network devices. Alternatively, the terminal may select to send corresponding MIMO layer number adjustment information to the S network devices of the K network devices.
  • the terminal sends a corresponding CSI message to the S network devices, and the CSI message corresponding to the jth network device carries the maximum number of MIMO layers that the jth network device can schedule for the terminal.
  • This approach is applied to scenarios where the terminal is configured to require feedback of the rank of the MIMO channel matrix to the network device.
  • the terminal only needs to carry the corresponding RI in the CSI, and the RI indicates the maximum number of MIMO layers that the network device can schedule for the terminal.
  • the present application provides a method for determining a MIMO layer number, comprising: receiving, by a network device, a first message modulated by a terminal by using a first modulation mode; and determining, by the network device, a correspondence between a modulation mode, a message type, and a preset value, Determining a first preset value corresponding to the first modulation mode and the first message, and adjusting a first preset value for the number of MIMO layers scheduled by the terminal; or, the network device receiving the terminal modulated by the first modulation mode And the network device determines, according to the modulation mode, the correspondence between the message type and the preset value, the second preset value corresponding to the first modulation mode and the first message, and adjusts the second MIMO layer number for the terminal scheduling.
  • the preset value wherein the first preset value is a positive integer, and the second preset value is a negative integer.
  • the method provided by the present application solves the problem that the terminal cannot process all the MIMO layers transmitted to the terminal, and the method for indicating that the network device adjusts the number of MIMO layers scheduled for the terminal does not increase the uplink. Communication overhead.
  • the network device receives the first message modulated by the terminal by using the second modulation mode; and the network device determines, according to the modulation mode, the correspondence between the message and the preset value, the second modulation mode and the first message.
  • the network device does not adjust to the number of MIMO layers scheduled by the terminal; or the network device receives the second message modulated by the terminal by using the second modulation mode; the network device is configured according to the modulation mode, the message, and the preset value.
  • determining a third preset value corresponding to the second modulation mode and the second message the network device does not adjust to the number of MIMO layers scheduled by the terminal; wherein, the third preset value is 0.
  • the terminal when the network device does not need to adjust the number of MIMO layers scheduled by the terminal, the terminal notifies the network device to adjust the number of MIMO layers scheduled for the terminal by changing the modulation mode.
  • the second message when the first message is an ACK message, the second message is a NACK message, when the first message is a NACK message, the second message is an ACK message; when the first modulation mode is a binary phase shift key
  • the second modulation mode is orthogonal binary phase shift keying QBPSK.
  • the first modulation mode is QBPSK
  • the second modulation mode is BPSK.
  • the first message, the second message, the first modulation mode, and the second modulation mode provide a combination of multiple implementation manners, and the implementation manner is flexible and convenient.
  • the application provides a method for determining a MIMO layer number, including: receiving, by a network device, MIMO layer number adjustment information sent by a terminal.
  • the network device adjusts the number of MIMO layers scheduled for the terminal according to the MIMO layer number adjustment information.
  • the MIMO layer number adjustment information carries the maximum number of MIMO layers that the network device can schedule for the terminal or the MIMO layer number adjustment corresponding to the network device, and the MIMO layer number adjustment amount corresponding to the network device is determined by the terminal according to the network device known by the terminal.
  • the number of MIMO layers and network devices scheduled by the terminal can be determined for the maximum number of MIMO layers scheduled by the terminal.
  • the method provided by the present application can adapt to the dynamic change of the wireless channel, improve the spectrum efficiency, and support multiple network devices in the scenario of joint transmission of multiple network devices, and the number of MIMO layers independently scheduled by the terminal, and multiple The sum of the number of MIMO layers independently scheduled by the network device for the terminal does not exceed the maximum number of MIMO layers that the terminal can process, and the overhead of the backhaul link and the requirement for low delay of the backhaul link can be avoided.
  • the number of MIMO layers scheduled by the network device for the terminal is the number of MIMO layers scheduled by the network device for the terminal or the number of MIMO layers that the terminal device can determine for the terminal. Maximum value.
  • the number of MIMO layers scheduled by the terminal for each network device in the embodiment of the present application may have multiple possible values, and the implementation manner is flexible and convenient.
  • the network device receives an ACK message or a NACK message sent by the terminal, and the ACK message or the NACK message carries a maximum number of MIMO layers that the network device can schedule for the terminal or a MIMO layer number adjustment corresponding to the network device.
  • the method provided by the embodiment of the present application can save the uplink overhead by using the original ACK message and the NACK message to carry the MIMO layer number adjustment amount without adding a new erasure format and type.
  • the application provides a terminal, including: a sending unit and a processing unit;
  • the processing unit is configured to determine a maximum number of MIMO layers that can be scheduled for the terminal by the K network devices that provide services for the terminal, where the K network devices respectively correspond to the The sum of the maximum number of MIMO layers scheduled by the terminal is less than or equal to the maximum number of MIMO layers that the terminal can process, and K is a positive integer greater than or equal to 2; the processing unit is further configured to: when determining the i-th network Equipment pair When the MIMO layer number adjustment amount is greater than or equal to the first preset value, the first message modulated by the first modulation mode is sent to the ith network device by using the sending unit, so that the The ith network device adjusts the first preset value for the number of MIMO layers scheduled by the terminal; and when it is determined that the MIMO layer number adjustment amount corresponding to the ith network device is less than or equal to the second preset value Transmitting, by the sending unit, the second message that is modulated by the first modulation mode to the i th network device, so that the i th network device adjust
  • the processing unit is further configured to: after determining that the K network devices serving the terminal respectively correspond to the maximum number of MIMO layers that can be scheduled for the terminal, when determining When the MIMO layer number adjustment amount corresponding to the i th network device is greater than the second preset value and smaller than the first preset value, the first message or the second message modulated by the second modulation mode is passed through Transmitting, by the sending unit, the i-th network device, so that the i-th network device does not adjust to the number of MIMO layers scheduled by the terminal.
  • the second message when the first message is an ACK message, the second message is a NACK message, and when the first message is a NACK message, the second message is an ACK message;
  • the first modulation mode is binary phase shift keying BPSK
  • the second modulation mode is orthogonal binary phase shift keying QBPSK
  • the first modulation mode is QBPSK
  • the second modulation mode is BPSK.
  • the processing unit is configured to: perform channel estimation according to the reference signals respectively sent by the K network devices, and determine that the K network devices respectively can be scheduled for the terminal a maximum number of MIMO layers; if it is determined that the sum of the maximum number of MIMO layers that can be scheduled for the terminal by the K network devices is greater than the maximum number of MIMO layers that the terminal can process, according to a preset algorithm Determining, by the K network devices, a maximum number of MIMO layers that can be scheduled for the terminal.
  • the number of MIMO layers scheduled by the i-th network device for the terminal is the number of MIMO layers scheduled by the i-th network device for the terminal.
  • the application provides a terminal, including: a processing unit and a sending unit;
  • the processing unit is configured to determine a maximum number of MIMO layers that can be scheduled for the terminal by the K network devices that provide services for the terminal, where the K network devices respectively correspond to the The sum of the maximum number of MIMO layers scheduled by the terminal is less than or equal to the maximum number of MIMO layers that the terminal can process, and K is a positive integer greater than or equal to 2; the sending unit is configured to be used in the K network devices
  • the S network devices respectively transmit the corresponding MIMO layer number adjustment information, S ⁇ K, wherein the MIMO layer number adjustment information corresponding to the jth network device carries the MIMO layer that the jth network device can schedule for the terminal a maximum value or a MIMO layer number adjustment amount corresponding to the jth network device, where the MIMO layer number adjustment amount corresponding to the jth network device is the jth network that the terminal is known according to the terminal
  • the number of MIMO layers scheduled by the jth network device for the terminal is the number of MIMO layers scheduled by the jth network device for the terminal.
  • the terminal The last determined number of MIMO layers that the jth network device can schedule for the terminal.
  • the processing unit is configured to:
  • the terminal re-determines the K according to a preset algorithm.
  • Each of the network devices corresponds to a maximum number of MIMO layers that can be scheduled for the terminal.
  • the transmitting unit is used for
  • the application provides a network device, including: a processing unit, a receiving unit;
  • the receiving unit is configured to receive a first message that is modulated by the terminal by using a first modulation manner, where the processing unit is configured to determine, according to a modulation mode, a correspondence between a message type and a preset value, and the first modulation mode.
  • the first preset value corresponding to the first message, and the first preset value is adjusted for the number of MIMO layers scheduled by the terminal; or the receiving unit is configured to receive the terminal by using the first a second message modulated by the modulation mode; the processing unit is configured to determine, according to the modulation mode, the correspondence between the message type and the preset value, the second corresponding to the first modulation mode and the first message a preset value, and adjusting the second preset value for the number of MIMO layers scheduled by the terminal; wherein the first preset value is a positive integer, and the second preset value is a negative integer.
  • the receiving unit is configured to receive the first message that is modulated by the terminal by using a second modulation manner
  • the processing unit is configured to use, according to the modulation mode, a message, and a preset a third preset value corresponding to the second modulation mode and the first message, where the network device does not adjust the number of MIMO layers scheduled by the terminal; or the receiving unit
  • the processing unit is configured to determine the second modulation according to the modulation mode, the correspondence between the message and the preset value, and the second message.
  • the third preset value corresponding to the second message the network device does not adjust the number of MIMO layers scheduled by the terminal; wherein the third preset value is 0.
  • the second message when the first message is an ACK message, the second message is a NACK message, and when the first message is a NACK message, the second message is an ACK message;
  • the first modulation mode is binary phase shift keying BPSK
  • the second modulation mode is orthogonal binary phase shift keying QBPSK
  • the first modulation mode is QBPSK
  • the second modulation mode is BPSK.
  • a network device includes: a processing unit, and a receiving unit;
  • the receiving unit is configured to receive MIMO layer number adjustment information sent by the terminal, where the MIMO layer number adjustment information carries a maximum number of MIMO layers that the network device can schedule for the terminal or a corresponding network device a MIMO layer number adjustment amount, the MIMO layer number adjustment amount corresponding to the network device is a MIMO layer number that the terminal schedules for the terminal according to the network device known by the terminal, and the network device can be the
  • the processing unit is configured to adjust the number of MIMO layers scheduled by the terminal according to the MIMO layer number adjustment information.
  • the number of MIMO layers scheduled by the network device for the terminal is the number of MIMO layers scheduled by the network device for the terminal or the last time of the terminal.
  • the receiving unit is configured to: receive an ACK message or a NACK message sent by the terminal, where the ACK message or the NACK message carries MIMO that the network device can schedule for the terminal The maximum number of layers or the amount of MIMO layer adjustment corresponding to the network device.
  • the embodiment of the present invention further provides a terminal, where the terminal has a function of implementing terminal behavior in the method instance of the foregoing first aspect.
  • the structure of the terminal includes a transceiver, a processor, and the transceiver is configured to perform communication interaction with a network device, and the processor is configured to support the terminal to perform a corresponding function in the method of the foregoing first aspect.
  • the terminal can also include a memory coupled to the processor that retains program instructions and data necessary for the terminal.
  • the embodiment of the present invention further provides a terminal, where the terminal has a function of implementing terminal behavior in the method instance of the foregoing second aspect.
  • the structure of the terminal includes a transceiver, a processor, and the transceiver is configured to perform communication interaction with a network device, and the processor is configured to support the terminal to perform a corresponding function in the method of the second aspect.
  • the terminal can also include a memory coupled to the processor that retains program instructions and data necessary for the terminal.
  • the embodiment of the present application further provides a network device, where the network device has a function of implementing network device behavior in the method instance of the foregoing third aspect.
  • the structure of the network device includes a processor, a transceiver, and the transceiver is configured to perform communication interaction with the terminal, and the processor is configured to support the network device to perform a corresponding function in the method of the foregoing third aspect.
  • the network device can also include a memory coupled to the processor that retains program instructions and data necessary for the network device.
  • the embodiment of the present application further provides a network device, where the network device has a function of implementing network device behavior in the method instance of the foregoing fourth aspect.
  • the structure of the network device includes a processor, a transceiver, and the transceiver is configured to perform communication interaction with the terminal, and the processor is configured to support the network device to perform a corresponding function in the method of the foregoing fourth aspect.
  • the network device can also include a memory coupled to the processor that retains program instructions and data necessary for the network device.
  • the embodiment of the present application further provides a communication system, where the communication system includes multiple network devices and terminals.
  • the embodiment of the present application further provides a first non-transitory computer storage medium, where computer executable instructions are stored, where the computer executable instructions are used to perform the foregoing first or second aspect of the present application. method.
  • the embodiment of the present application further provides a second non-transitory computer storage medium, where computer executable instructions are stored, where the computer executable instructions are used to perform the foregoing third or fourth aspect of the present application. method.
  • the embodiment of the present application further provides a first computer program product, the computer program product comprising a computer program stored on the first non-transitory computer storage medium, the computer program comprising program instructions And when the program instructions are executed by a computer, causing the computer to perform the method of the first aspect or the second aspect of the present application.
  • the embodiment of the present application further provides a second computer program product, the computer program product comprising a computer program stored on the second non-transitory computer storage medium, the computer program comprising program instructions And when the program instructions are executed by a computer, causing the computer to perform the method of the third aspect or the fourth aspect of the present application.
  • the dynamic change of the wireless channel can be adapted, the spectrum efficiency is improved, and the
  • multiple network devices are MIMO layers that are independently scheduled by the terminal, and the total number of MIMO layers that ensure that multiple network devices are independently scheduled by the terminal does not exceed the number of MIMO layers that the terminal can process.
  • the maximum value also avoids the overhead of the backhaul link and reduces the low latency requirements for the backhaul link.
  • FIG. 1 is a schematic diagram of a scenario in which two TRPs jointly send data to one UE in the background art of the present application;
  • FIG. 2 is a schematic diagram of a main application scenario in an embodiment of the present application.
  • FIG. 3 is a flowchart of an overview of a method for determining a MIMO layer number in an embodiment of the present application
  • FIG. 5 is a second flowchart of an overview of a method for determining a MIMO layer number in an embodiment of the present application
  • FIG. 6 is a schematic diagram of a specific process for determining the number of MIMO layers in the embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a unit of a terminal in an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a unit of a network device according to an embodiment of the present application.
  • FIG. 9 is a schematic diagram of a physical structure of a terminal in an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a physical structure of a network device according to an embodiment of the present application.
  • the downlink refers to the message transmission of the network device to the terminal
  • the uplink refers to the message transmission of the terminal to the network device.
  • the system to which the embodiment of the present application is applicable may be a system using frequency division duplex (FDD) or a system of time division duplex (TDD).
  • the network element involved in the embodiment of the present application includes a network device and a terminal.
  • the network device is an access device that the terminal accesses to the mobile communication system by using a wireless device, and may be a base station (NodeB), an evolved base station (eNodeB), a base station in a 5G mobile communication system, a small base station, and a micro base station.
  • NodeB base station
  • eNodeB evolved base station
  • the TRP, the base station in the future mobile communication system, or the access node in the WiFi system, and the like, the embodiment of the present application does not limit the specific technology and the specific device mode adopted by the network device.
  • the terminal may also be called a terminal equipment, a user equipment (UE), a mobile station (MS), a mobile terminal (MT), or the like.
  • the terminal can be a mobile phone, a tablet (Pad, a tablet), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, an industrial control (industrial) Wireless terminal in control, wireless terminal in self driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, transportation safety A wireless terminal, a wireless terminal in a smart city, a wireless terminal in a smart home, and the like.
  • a plurality of network devices that send data to the terminal form a network device set, which may be referred to as a service network device set, which is also referred to as a terminal, and is associated with a network device in the service network device set, or provides the terminal with Multiple network devices serving.
  • multiple network devices may be one gNB (Next Generation Node B, next generation base station)
  • the control may also be controlled by multiple gNBs, or a plurality of network devices may be connected to one gNB or may be connected to multiple gNBs.
  • a TPR serving a UE is called a Serving TRP Set
  • the serving TRP set may include K TRPs, where K Is an integer greater than or equal to 2. Therefore, there may be K TRPs serving one UE at the same time, that is, each TRP may send one or more scheduling information (such as downlink control information (DCI)) to the UE and/or corresponding to the foregoing scheduling information.
  • DCI downlink control information
  • Data for example, physical downlink shared channel (PDSCH)).
  • the K TRPs may be connected to the same gNB, that is, controlled by the same gNB.
  • the total number of MIMO layers scheduled by the K TRPs on the same time-frequency resource or partially overlapping time-frequency resources may exceed the MIMO that the UE can process.
  • the maximum number of layers causes the terminal to fail to process all MIMO layers transmitted to the terminal, thereby causing UE decoding errors and waste of downlink channel resources.
  • an embodiment of the present application provides a method for determining a MIMO layer number, where the method includes:
  • Step 300 The terminal determines the maximum number of MIMO layers that can be scheduled by the K network devices that provide services for the terminal.
  • the sum of the maximum number of MIMO layers that can be scheduled by the K network devices is less than or equal to the maximum number of MIMO layers that the terminal can process, and K is a positive integer greater than or equal to 2.
  • Step 310a When the terminal determines that the MIMO layer number adjustment amount corresponding to the i th network device is greater than or equal to the first preset value, the terminal sends the first message modulated by the first modulation mode to the i th network device, The second preset value is adjusted by the number of MIMO layers scheduled by the i-th network device for the terminal.
  • Step 320a The network device receives the first message that is modulated by the first modulation mode and is configured by the terminal, and determines, according to the modulation mode, the correspondence between the message type and the preset value, the first corresponding to the first modulation mode and the first message.
  • the preset value is adjusted, and the first preset value is adjusted for the number of MIMO layers scheduled by the terminal.
  • Step 310b When the terminal determines that the MIMO layer number adjustment amount corresponding to the i th network device is less than or equal to the second preset value, the terminal sends the second message modulated by the first modulation mode to the i th network device, The second preset value is adjusted by the number of MIMO layers scheduled by the i-th network device for the terminal.
  • Step 320b The network device receives the second message that is sent by the terminal and is modulated by the first modulation mode, and determines, according to the modulation mode, the correspondence between the message type and the preset value, the second corresponding to the first modulation mode and the second message.
  • the preset value is adjusted, and the second preset value is adjusted for the number of MIMO layers scheduled by the terminal.
  • the MIMO layer number adjustment amount corresponding to the i-th network device is determined by the terminal according to the ith layer of the ith layer that is known by the terminal, and the maximum number of MIMO layers that the i-th network device can schedule for the terminal.
  • the first preset value is a positive integer
  • the second preset value is a negative integer.
  • the i-th network device is any one of the K network devices, and i is a positive integer less than or equal to K.
  • steps 310a and 320a, and step 310b and step 320b are two possible cases.
  • the terminal determines the maximum number of MIMO layers that can be scheduled for the terminal by the K network devices that serve the terminal, and may be, but not limited to, the following:
  • the terminal performs channel estimation according to the reference signals respectively sent by the K network devices, and determines the maximum number of MIMO layers that the K network devices respectively can be scheduled for the terminal. If the terminal determines that the sum of the maximum number of MIMO layers that can be scheduled for the terminal by the K network devices is greater than the maximum number of MIMO layers that the terminal can process, the terminal re-determines according to the preset algorithm that the corresponding devices of the K network devices can be terminals. The maximum number of MIMO layers scheduled.
  • the terminal determines that the sum of the maximum number of MIMO layers that can be scheduled for the terminal by the K network devices is less than or equal to the maximum number of MIMO layers that the terminal can process, the terminal does not need to re-determine that the K network devices respectively can be scheduled for the terminal.
  • the maximum number of MIMO layers ensures that the sum of the maximum number of MIMO layers that can be scheduled for the terminal by the K network devices is less than or equal to the maximum number of MIMO layers that the terminal can process, and can solve the problem that the terminal cannot process the transmission to the terminal. All MIMO layer issues.
  • the following uses a network device as an example to describe how the terminal determines the maximum number of MIMO layers that the network device can schedule for the terminal.
  • the reference signal sent by the network device may be a channel state information reference signal (CSI-RS), or a demodulation reference signal (DMRS), or a cell-specific reference signal (cell). -specific reference Signal, CRS). Therefore, the terminal can measure and estimate the downlink channel or the channel matrix according to any one of the reference signals to obtain channel state information (CSI).
  • the CSI may include at least one of the following: a channel quality indicator (CQI), a rank indication (RI) of the MIMO channel matrix, a precoding matrix indicator (PMI), or a precoding. Type indication (PTI).
  • the RI indicates the maximum number of MIMO layers that the network device can schedule for the terminal.
  • the terminal can obtain the maximum number of MIMO layers that can be scheduled for the terminal by the K network devices by using the foregoing method.
  • the maximum number of MIMO layers that can be scheduled for the terminal by the K network devices are respectively S 1 , S 2 , . . . , S K .
  • the terminal calculates a maximum number of MIMO layers that can be scheduled for the terminal by the K network devices.
  • Algorithm 1 The terminal can first sort (S 1 , S 2 , ..., S K ) from large to small, and then perform a subtraction process in turn.
  • the terminal After the terminal determines the maximum number of MIMO layers that can be scheduled by the terminal for the K network devices that are served by the terminal, the terminal first needs to determine the MIMO layer number adjustment amount corresponding to each network device, that is, the calculation is known.
  • the network device is the difference between the number of MIMO layers scheduled by the terminal and the maximum number of MIMO layers that the network device can schedule for the terminal.
  • the following takes the i-th network device as an example to describe how the terminal calculates the MIMO layer number adjustment amount C i corresponding to the i-th network device. It is assumed that the maximum number of MIMO layers that the i-th network device can schedule for the terminal is R i .
  • the number of MIMO layers scheduled by the i-th network device that is known by the terminal may be the following two possible values:
  • the second possible value is: the MIMO layer maximum value Q i that the i-th network device determined by the terminal last time can be scheduled for the terminal.
  • the terminal After the terminal obtains the MIMO layer number adjustment corresponding to the i-th network device, the terminal determines the MIMO layer number adjustment amount and the preset value corresponding to the i-th network device according to the modulation mode, the correspondence between the message type and the preset value. The relationship determines the modulation mode and message type used to send messages to the i-th network device.
  • the correspondence between the modulation mode, the message type, and the preset value is as shown in Table 1.
  • the terminal determines that the MIMO layer number adjustment amount corresponding to the i th network device is greater than or equal to the first preset value, for example, the first preset value is 2, the MIMO layer number adjustment amount corresponding to the i th network device is 3.
  • the terminal sends the first message modulated by the first modulation mode to the i th network device, so that the i th network device adjusts the first preset value of the number of MIMO layers scheduled by the terminal.
  • the network device receives the first message modulated by the first modulation mode sent by the terminal, and determines the first modulation mode according to the modulation mode, the correspondence between the message type and the preset value, and The first message corresponds to the first preset value, and the first preset value is adjusted for the number of MIMO layers scheduled by the terminal, that is, the number of MIMO layers scheduled by the terminal is increased by two layers.
  • the terminal determines that the MIMO layer number adjustment amount corresponding to the i th network device is less than or equal to the second preset value, for example, the second preset value is -2, the MIMO layer number adjustment amount corresponding to the i th network device is - 3.
  • the terminal sends the second message modulated by the first modulation mode to the i th network device.
  • the network device receives the second message that is sent by the terminal and is modulated by the first modulation mode, and determines a second preset value corresponding to the first modulation mode and the first message according to the modulation mode, the correspondence between the message type and the preset value. And adjusting the second preset value for the number of MIMO layers scheduled by the terminal, that is, reducing the number of MIMO layers scheduled by the terminal by two layers.
  • the terminal determines that the MIMO layer number adjustment amount corresponding to the i th network device is greater than the second preset value and is less than the first preset value, for example, the first preset value is 2, and the second preset value is - 2.
  • the MIMO layer number adjustment amount corresponding to the i-th network device is -1, and the terminal sends the first message or the second message modulated by the second modulation mode to the i-th network device, so that the i-th network device The number of MIMO layers scheduled for the terminal is not adjusted.
  • the network device receives the first message that is sent by the terminal and is modulated by the second modulation mode, and the network device determines, according to the modulation mode, the correspondence between the message and the preset value, the third preset corresponding to the second modulation mode and the first message.
  • the value of the network device is not adjusted to the number of MIMO layers scheduled by the terminal; or the network device receives the second message that is sent by the terminal and modulated by the second modulation mode, and the network device is configured according to the modulation mode. And determining, by the corresponding relationship between the message and the preset value, a third preset value corresponding to the second modulation mode and the second message. Because the third preset value is 0, the network device does not adjust the number of MIMO layers scheduled by the terminal.
  • the second message when the first message is an acknowledgement (ACK) message, the second message is a negative acknowledgement (NACK) message, and when the first message is a NACK message, the second message is an ACK.
  • ACK acknowledgement
  • NACK negative acknowledgement
  • the second modulation mode is Quadrature Binary Phase Shift Keying (QBPSK).
  • the first modulation mode is QBPSK
  • the second modulation mode is BPSK.
  • Figure 4 shows the BPSK constellation and the QBPSK constellation.
  • BPSK and QBPSK are relative, that is, the QBPSK constellation is obtained by rotating the BPSK constellation by 90 degrees.
  • the constellation of BPSK can be other forms, for example, a constellation of BPSK is obtained from a constellation diagram of Quadrature Phase Shift Keying (QPSK) or Quadrature Amplitude Modulation (QAM).
  • QPSK Quadrature Phase Shift Keying
  • QAM Quadrature Amplitude Modulation
  • the terminal indicates that the network device adjusts the number of MIMO layers scheduled by the terminal, and the network device needs to have the capability of automatically identifying two modulation modes, BPSK and QBPSK.
  • Table 2 is taken as an example to illustrate how the terminal instructs the network device to adjust the number of MIMO layers scheduled by the terminal. Where a is a positive integer and b is a negative integer.
  • the terminal determines that the MIMO layer number adjustment amount corresponding to the network device is greater than or equal to a, the terminal sends the BPSK-modulated ACK to the network device, so that the network device adjusts the number of MIMO layers scheduled by the terminal, that is, increases. a layer.
  • the terminal determines that the MIMO layer number adjustment amount corresponding to the network device is less than or equal to b, the terminal sends the BPSK-modulated NACK to the network device, so that the network device adjusts b for the MIMO layer number scheduled by the terminal, that is, decreases. Layer b.
  • the terminal determines that the MIMO layer number adjustment amount corresponding to the network device is greater than b and less than a, the terminal sends the ACK or NACK after the QBPSK modulation to the network device, so that the network device does not adjust to the number of MIMO layers scheduled by the terminal.
  • the terminal can avoid the overhead of the backhaul link and reduce the low delay requirement for the backhaul link, and solves the problem that the terminal cannot handle all the MIMO layers transmitted to the terminal. And indicating, by the foregoing method, that the network device adjusts the number of MIMO layers scheduled for the terminal does not increase the uplink communication overhead.
  • the embodiment of the present application further provides a method for determining the number of MIMO layers, and the repetition of the embodiment shown in FIG. 3 is not described again.
  • the specific method is shown in FIG. 5, and the method includes:
  • Step 500 The terminal determines, according to the K network devices that provide services for the terminal, the maximum number of MIMO layers that can be scheduled by the terminal.
  • the sum of the maximum number of MIMO layers that can be scheduled by the K network devices is less than or equal to the maximum number of MIMO layers that the terminal can process, and K is a positive integer greater than or equal to 2.
  • step 500 is the same as the specific implementation of step 300 in FIG. 3 and will not be described again.
  • Step 510 The terminal separately sends corresponding MIMO layer number adjustment information to S network devices of the K network devices, where S ⁇ K.
  • the MIMO layer number adjustment information corresponding to the jth network device carries the maximum number of MIMO layers that the jth network device can schedule for the terminal or the MIMO layer number adjustment corresponding to the jth network device, where the jth network device corresponds
  • the MIMO layer number adjustment is determined by the terminal according to the number of MIMO layers scheduled by the jth network device known to the terminal and the maximum number of MIMO layers that the jth network device can schedule for the terminal, and the jth network device is Any of the S network devices.
  • step 500 is the same as the specific implementation manner of the step 300 in FIG. 3, and the calculation method of the MIMO layer number adjustment amount corresponding to the jth network device is also the same as the calculation method mentioned in the embodiment shown in FIG. , the repetition will not be repeated.
  • the S network devices include a network device that the terminal has not sent the maximum number of MIMO layers that can be scheduled for the terminal, and the number of MIMO layers that the terminal knows for the terminal and the terminal can determine as the terminal.
  • the network device that the terminal does not send the maximum number of MIMO layers that can be scheduled for the terminal may be the network device that serves the terminal for the first time. For example, when the network device set serving the terminal changes, there may be New network devices serve the terminal.
  • the network device that is known by the terminal to be the number of MIMO layers scheduled by the terminal and the maximum number of MIMO layers that the terminal can determine for the terminal to be scheduled is the network to which the terminal has transmitted the maximum number of MIMO layers that can be scheduled for the terminal.
  • the network device adjusts to the number of MIMO layers scheduled by the terminal.
  • the network device that is known by the terminal to be the number of MIMO layers scheduled by the terminal and the maximum number of MIMO layers that the terminal can determine for the terminal to be scheduled is the network to which the terminal has transmitted the maximum number of MIMO layers that can be scheduled for the terminal.
  • the device, but the terminal does not change according to the maximum number of MIMO layers that the network device can determine for the terminal, and the known number of MIMO layers that the network device schedules for the terminal, so the terminal does not need to notify the network device. Adjust the number of MIMO layers scheduled for the terminal. That is, the corresponding MIMO layer number adjustment information is not sent to the network device, so as to save uplink communication overhead.
  • the terminal may choose to separately send corresponding MIMO layer number adjustment information to all K network devices.
  • the terminal may select to send the corresponding MIMO layer number adjustment information to the S network devices in the K network devices, and ensure that the maximum number of MIMO layers that the terminal can determine for the terminal and the known ones are The number of MIMO layers scheduled by the terminal is compared with the MIMO layer number adjustment information transmitted by the network device that changes.
  • the terminal separately sends the corresponding MIMO layer number adjustment information to the S network devices of the K network devices, which may be used in the following manners:
  • the terminal sends a corresponding CSI message to the S network devices, and the CSI message corresponding to the jth network device carries the maximum number of MIMO layers that the jth network device can schedule for the terminal.
  • the first approach is applied to a scenario that is more suitable for a terminal that is configured to feed back a rank of a MIMO channel matrix to a network device.
  • the terminal determines that the sum of the maximum number of MIMO layers that can be scheduled for the terminal by the K network devices is less than or equal to the maximum number of MIMO layers that the terminal can process, the terminal does not need to re-determine that the corresponding corresponding to the K network devices can be The maximum number of MIMO layers scheduled by the terminal. For each network device, the terminal only needs to carry the corresponding RI in the CSI, and the RI indicates the maximum number of MIMO layers that the network device can schedule for the terminal.
  • the terminal determines that the sum of the maximum number of MIMO layers that can be scheduled for the terminal by the K network devices is greater than the maximum number of MIMO layers that the terminal can process, the terminal re-determines according to the preset algorithm that the corresponding devices of the K network devices can be terminals.
  • the RI at this time may be the maximum value of the original MIMO layer, or the maximum number of MIMO layers re-determined, or CSI. Carrying the corresponding RI is the maximum number of original MIMO layers, and the CSI also carries the maximum value of the re-determined MIMO layer.
  • the CSI information may be transmitted through a physical uplink shared channel (PUSCH), or may be transmitted through a physical uplink control channel (PUCCH).
  • PUSCH physical uplink shared channel
  • PUCCH physical uplink control channel
  • the terminal sends a corresponding ACK message or a NACK message to the S network devices, and the ACK message or the NACK message corresponding to the jth network device carries the maximum number of MIMO layers or the jth network device that the jth network device can schedule for the terminal. Corresponding MIMO layer number adjustment.
  • ACK message or NACK message may be sent through the PUSCH, or may be sent through the PUCCH.
  • the second approach is applied to scenarios that are more suitable for the terminal to be configured to not feed back the rank of the MIMO channel matrix to the network device.
  • the terminal separately transmits corresponding MIMO layer number adjustment information to the S network devices on the dedicated PUCCH resource.
  • the MIMO layer number adjustment information is defined on a dedicated physical basis.
  • Line control channel format and resources PUCCH Format. Therefore, the terminal can separately send corresponding MIMO layer number adjustment information to the S network devices by using a dedicated uplink physical control channel format and resources. Transmitting the corresponding MIMO layer number adjustment information to the S network devices respectively.
  • the dedicated uplink physical control channel resource may be shared by multiple terminals, and may be code division multiplexed (ie, different terminals may use different codes or sequences). The method is to distinguish MIMO layer number adjustment information of multiple terminals.
  • the terminal separately transmits corresponding MIMO layer number adjustment information to the S network devices through a Medium Access Control Control Element (MAC CE).
  • MAC CE Medium Access Control Control Element
  • the terminal may send the MIMO layer number adjustment information to the kth network device by using the MAC CE.
  • the network device receives the MIMO layer number adjustment information sent by the terminal, and adjusts the number of MIMO layers scheduled by the terminal according to the MIMO layer number adjustment information, including the following two cases:
  • the MIMO layer number adjustment information carries the maximum number of MIMO layers that the network device can schedule for the terminal.
  • the network device After receiving the MIMO layer number adjustment information sent by the terminal, the network device determines the number of MIMO layers scheduled for the next time according to the maximum number of MIMO layers that the network device can schedule for the terminal, and the next time is the MIMO layer scheduled for the terminal.
  • the number may be less than or equal to the maximum number of MIMO layers that the network device can schedule for the terminal.
  • the MIMO layer number adjustment information carries the MIMO layer number adjustment amount corresponding to the network device.
  • the network device After receiving the MIMO layer number adjustment information sent by the terminal, the network device determines, according to the MIMO layer number adjustment corresponding to the network device, based on the number of MIMO layers that are known to be scheduled by the terminal (for example, the MIMO that was last scheduled for the terminal) On the basis of the number of layers or based on the last determined maximum number of MIMO layers scheduled for the terminal, the number of MIMO layers scheduled for the terminal is increased or decreased, and the number of MIMO layers scheduled for the next terminal is determined.
  • the network device does not receive the MIMO layer number adjustment information sent by the terminal, which may be because the terminal does not have the MIMO layer number adjustment information sent to the network device, or the network device does not receive the MIMO sent by the terminal device.
  • Layer adjustment information the network device adopts the maximum value of the default MIMO layer number, for example, the default value is 1, or repeatedly uses the MIMO layer value that was last scheduled for the terminal.
  • the network device 1 and the network device 2 provide services for the terminal, and the network device 1 and the network device 2 successively send reference signals to the terminal, and then the terminal respectively channels the reference signal sent by the network device 1 and the reference signal sent by the network device 2
  • the terminal determines to provide the terminal with the maximum number of MIMO layers that can be scheduled by the service network device 1 and the network device 2 respectively.
  • the terminal transmits corresponding MIMO layer number adjustment information to the network device 1 and the network device 2, respectively.
  • the MIMO layer number adjustment information sent by the terminal to the network device 1 carries the maximum number of MIMO layers (or the MIMO layer number adjustment amount) that the network device 1 can schedule for the terminal, and the number of MIMO layers sent by the network device 1 at the receiving terminal After the information is adjusted, the maximum number of MIMO layers (or the MIMO layer number adjustment amount) that the network device 1 can schedule for the terminal is adjusted to the number of MIMO layers scheduled by the terminal, and the data is transmitted to the terminal.
  • the MIMO layer number adjustment information sent by the terminal to the network device 2 carries the maximum number of MIMO layers (or the MIMO layer number adjustment amount) that the network device 2 can schedule for the terminal, and the number of MIMO layers transmitted by the network device 2 at the receiving terminal. After the information is adjusted, the maximum number of MIMO layers (or the MIMO layer number adjustment amount) that the network device 1 can schedule for the terminal is adjusted to the number of MIMO layers scheduled by the terminal, and the data is transmitted to the terminal.
  • the network device 1 carried by the MIMO layer number adjustment information can be MIMO for terminal scheduling
  • the maximum number of layers is the same as the number of MIMO layers that the network device 1 knows for the terminal scheduling (or the MIMO layer number adjustment is 0), and the network device 1 does not need to adjust the number of MIMO layers scheduled for the terminal.
  • the number of MIMO layers scheduled by the network device 1 for the terminal is the same as the number of MIMO layers that the network device 1 known by the terminal is scheduled by the terminal.
  • the embodiment shown in FIG. 5 can adapt to the dynamic change of the wireless channel, improve the spectrum efficiency, and support multiple network devices in the scenario of joint transmission of multiple network devices, and the number of MIMO layers independently scheduled by the terminal is ensured.
  • the sum of the number of MIMO layers independently scheduled by the plurality of network devices does not exceed the maximum number of MIMO layers that the terminal can process, which can avoid the overhead of the backhaul link and reduce the requirement for low latency of the backhaul link.
  • the embodiment of the present application provides a terminal, which is used to implement the method shown in FIG. 3 or FIG. 5.
  • the terminal 700 includes: a sending unit 701 and a processing unit 702;
  • the embodiment of the present application provides a network device, which is used to implement a method for selecting a beam as shown in FIG. 3 or FIG. 5.
  • the network device 800 includes: a receiving unit 801 and Processing unit 802.
  • each unit of the above terminal and network device is only a division of logical functions, and the actual implementation may be integrated into one physical entity in whole or in part, or may be physically separated.
  • these units may all be implemented in the form of software by means of processing component calls; or may be implemented entirely in hardware; some units may be implemented in software in the form of processing component calls, and some units may be implemented in hardware.
  • the processing unit may be a separately set processing element, or may be integrated in a certain chip. Alternatively, it may be stored in a memory in the form of a program, and a function of the unit is called and executed by a certain processing element.
  • the implementation of other units is similar. In addition, all or part of these units can be integrated or implemented independently.
  • the processing elements described herein can be an integrated circuit that has signal processing capabilities.
  • each step of the above method or each of the above units may be completed by an integrated logic circuit of hardware in the processor element or an instruction in a form of software.
  • the above receiving unit is a unit for controlling reception, and can receive information through a receiving device of a terminal or a network device, such as an antenna and a radio frequency device.
  • the above sending unit is a unit for controlling transmission, and can transmit information through a transmitting device of a terminal or a network device, such as an antenna and a radio frequency device.
  • the above units may be one or more integrated circuits configured to implement the above methods, such as one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (digital) Singnal processor (DSP), or one or more Field Programmable Gate Array (FPGA).
  • ASICs Application Specific Integrated Circuits
  • DSP digital Singnal processor
  • FPGA Field Programmable Gate Array
  • the processing element can be a general purpose processor, such as a central processing unit (CPU) or other processor that can invoke the program.
  • CPU central processing unit
  • these units can be integrated and implemented in the form of a system-on-a-chip (SOC).
  • SOC system-on-a-chip
  • the embodiment of the present application further provides a terminal, which is used to implement the method shown in FIG. 3 or FIG. 5, and has the function of the terminal as shown in FIG.
  • the terminal device includes: one or more transceivers 901, one or more processors 902, one or more memories 903, and one or more antennas 904, wherein the functions of the transmitting unit 701 in FIG. 7 are transmitted and received through the The machine 801 is implemented, and the function of the processing unit 702 is implemented by the processor 902.
  • the memory 903 is configured to store programs, instructions, and the like.
  • the program can include program code, the program code including computer operating instructions.
  • the memory 903 may include RAM and may also include non-volatile memory, such as at least one disk storage.
  • the processor 902 executes an application stored in the memory 903 to implement the above functions, thereby implementing the method as shown in FIG. 3 or FIG. 5.
  • the embodiment of the present application further provides a network device, which is used to implement the method shown in FIG. 3 or FIG. 5, and has the function of the network device as shown in FIG.
  • the network device 1000 includes one or more transceivers 1001, one or more processors 1002, one or more memories 1003, one or more antennas 1004, and one or more other interfaces (eg, fiber optic link interfaces) , an Ethernet interface, and/or a copper wire interface, etc., wherein the function of the receiving unit 801 is implemented by the transceiver 1001, and the function of the processing unit 802 is implemented by the processor 1002,
  • the memory 1003 is configured to store programs, instructions, and the like.
  • the program can include program code, the program code including computer operating instructions.
  • the memory 1003 may include a random access memory (RAM), and may also include a non-volatile memory, such as at least one disk storage.
  • the processor 1002 executes an application stored in the memory 1003 to implement the above functions, thereby implementing the method shown in FIG.
  • the present application provides a method for determining the number of MIMO layers, where the terminal determines the maximum number of MIMO layers that can be scheduled for the terminal by the K network devices that provide services for the terminal; when the terminal determines the i-th network device When the corresponding MIMO layer number adjustment is greater than or equal to the first preset value, the terminal sends the first message modulated by the first modulation mode to the i th network device, so that the i th network device is the terminal scheduled MIMO.
  • the number of layers is adjusted to a first preset value; when the terminal determines that the MIMO layer number adjustment amount corresponding to the i th network device is less than or equal to the second preset value, the terminal sends the second message modulated by the first modulation mode to the first
  • the i network devices adjust the second preset value of the number of MIMO layers scheduled by the i-th network device for the terminal. Therefore, by using the method provided by the present application, the terminal can avoid the overhead of the backhaul link and reduce the requirement for low delay of the backhaul link, and solve the problem that the terminal cannot process all the MIMO layers transmitted to the terminal, and the method is indicated by the foregoing method.
  • the number of MIMO layers that the network device adjusts to the terminal scheduling does not increase the uplink communication overhead.
  • the present application provides a method for determining the number of MIMO layers, where the terminal determines the maximum number of MIMO layers that can be scheduled for the terminal by the K network devices that provide services for the terminal, and the terminal respectively determines the S network devices of the K network devices. Send corresponding MIMO layer number adjustment information, S ⁇ K.
  • the method provided by the present application can adapt to the dynamic change of the wireless channel, improve the spectrum efficiency, and support multiple network devices in the scenario of joint transmission of multiple network devices, and the number of MIMO layers independently scheduled by the terminal, and multiple The sum of the number of MIMO layers independently scheduled by the network device for the terminal does not exceed the maximum number of MIMO layers that the terminal can process, and the overhead of the backhaul link and the requirement for low delay of the backhaul link can be avoided.
  • embodiments of the present application can be provided as a method, system, or computer program product. Therefore, the embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Moreover, embodiments of the present application can take the form of a computer program product embodied on one or more computer usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG.
  • These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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

Abstract

La présente invention concerne un procédé et un dispositif de détermination d'un nombre de couches MIMO. Le procédé comprend les étapes suivantes : un terminal détermine le nombre maximal de couches MIMO qui correspondent respectivement à K dispositifs de réseau desservant le terminal, et qui peuvent être ordonnancés pour le terminal, la somme des valeurs maximales du nombre de couches MIMO qui correspondent respectivement à K dispositifs de réseau desservant le terminal, et qui peut être programmée pour le terminal, est inférieure ou égale à la valeur maximale d'un certain nombre de couches MIMO qui peuvent être traitées par le terminal; si le terminal détermine que la quantité de réglage d'un certain nombre de couches MIMO correspondant à un i ème dispositif de réseau , est supérieure ou égale à une première valeur prédéfinie, le terminal envoie un premier message, modulé au moyen d'un premier mode de modulation, au i ème dispositif de réseau, de telle sorte que l'i ème dispositif de réseau ajuste le nombre de couches MIMO programmées pour le terminal à la première valeur prédéfinie ; si le terminal détermine que la quantité de réglage du nombre de couches MIMO correspondant au i ème dispositif de réseau , est inférieur ou égal à une seconde valeur prédéfinie, le terminal envoie un second message, modulé au moyen du premier mode de modulation, au i ème dispositif de réseau , de telle sorte que l'i ème dispositif de réseau ajuste le nombre de couches MIMO programmées pour le terminal à la seconde valeur prédéfinie.
PCT/CN2017/094764 2017-06-23 2017-07-27 Procédé et dispositif de détermination d'un nombre de couches mimo WO2018232832A1 (fr)

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CN113938923B (zh) * 2021-09-24 2023-06-20 山东浪潮科学研究院有限公司 一种nr系统中mimo调度的方法

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CN102461038A (zh) * 2009-06-23 2012-05-16 株式会社Ntt都科摩 基站装置以及信息反馈方法
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CN113348712B (zh) * 2019-07-26 2023-05-26 Oppo广东移动通信有限公司 Mimo层数自适应调整方法及相关产品

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