CN113518447B

CN113518447B - Communication method and device

Info

Publication number: CN113518447B
Application number: CN202010281170.7A
Authority: CN
Inventors: 刘显达; 张雷鸣
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2024-06-07
Anticipated expiration: 2040-04-10
Also published as: CN113518447A

Abstract

The embodiment of the application provides a communication method and device. According to the application, the second communication device configures codebook subsets corresponding to the SRS resources to the first communication device, and when the SRS resources are indicated, the codebook subsets can be indicated through the corresponding relation between the SRS resources and the codebook subsets. Therefore, when the number of ports included in the plurality of SRS resources configured by the first communication apparatus are different, and the number of ports included in the SRS resource for transmitting SRS indicated by the second information is smaller than the maximum number of ports supported by the first communication apparatus, uplink transmission performance of the first communication apparatus can be improved.

Description

Communication method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a communications method and apparatus.

Background

Currently, in a new radio access technology (New Radio Access Technology, NR) system, when a User Equipment (UE) performs uplink transmission, it is required to send an SRS on a configured Sounding REFERENCE SIGNAL (SRS) resource, and a base station receives and measures the SRS to obtain uplink channel quality information. The base station may further determine uplink scheduling information according to the uplink channel quality information, where the uplink scheduling information may include time-frequency resource allocation and a precoding matrix used for uplink transmission. The base station transmits uplink scheduling information to the UE, and the UE transmits uplink data according to the uplink scheduling information.

Further, the base station may configure a plurality of SRS resources within a certain bandwidth range (e.g., one carrier element (component carrier, CC) or one partial Bandwidth (BWP) or a certain bandwidth range) for the same UE. The number of ports in different SRS resources may be different, for example, for a 4-transmit port (Tx) UE, a 4-port (4-port) SRS resource and a 2-port (2-port) SRS resource may be configured, and this manner of configuring SRS resources may reduce the overhead of SRS resources.

In addition, the base station may configure the codebook subset according to the coherence capability reported by the UE, and for a UE with partial coherence capability, the base station may choose to configure the partial coherence codebook subset and the incoherent codebook subset, or configure the incoherent codebook subset. Since the current coherence capability report is UE-level, i.e. the UE determines the corresponding coherence capability according to the number of its transmitting antennas, the base station determines a codebook subset configuration according to the coherence capability report, where the codebook subset configuration is common to different SRS resources on a specific bandwidth, the UE may use the same codebook subset when the base station indicates SRS resources with different numbers of ports (characterizing that uplink transmission uses different transmitting antenna ports), but in the case of using SRS resources with certain numbers of ports, the UE still uses the codebook subset, which may result in limited UE transmission performance.

Disclosure of Invention

The application provides a communication method and a communication device, which are used for improving transmission performance when user equipment is configured with a plurality of SRS resources.

In a first aspect, the present application provides a method of communication. The method may be performed by a first communication device. The first communication device may comprise a UE or comprise a component in the UE, such as a chip or the like.

According to the method, a first communication device may receive first information from a second communication device. The first information may be used to indicate at least two codebook subsets and at least two SRS resources, wherein each codebook subset is associated with at least one of the at least two SRS resources, each of the at least two SRS resources including a number of SRS ports greater than 1. The first communication device may also receive second information from the second communication device, the second information indicating a first SRS resource, the first SRS resource being one of the at least two SRS resources. The first communication device determines TPMI according to a first codebook subset corresponding to the first SRS resource, where the first codebook subset is one of the at least two codebook subsets.

By adopting the method, the second communication device can configure codebook subsets corresponding to the SRS resources to the first communication device, and the codebook subsets can be indicated through the corresponding relation between the SRS resources and the codebook subsets when the SRS resources are indicated. Therefore, when the number of ports included in the plurality of SRS resources configured by the first communication apparatus are different, and the number of ports included in the SRS resource for transmitting SRS indicated by the second information is smaller than the maximum number of ports supported by the first communication apparatus, uplink transmission performance of the first communication apparatus can be improved.

Specifically, the correspondence between the SRS resource and the codebook subset may be notified through configuration signaling, for example, the configuration signaling indicates an index of the correspondence, or the correspondence may be predefined through a protocol. Specifically, the pre-defining manner of the protocol may be that the protocol directly defines codebook subsets under different SRS port numbers without based on the configuration situation of the SRS resources, or the first information only displays one codebook subset corresponding to a part of SRS resources in the configured plurality of SRS resources, and the codebook subsets corresponding to the rest of SRS resources except the part of SRS resources in the configured plurality of SRS resources are determined according to the indication information and the capability indication information.

In one possible design, the at least two SRS resources may further include a second SRS resource, and the first communication device may further transmit third information to the second communication device, the third information being usable to indicate the first maximum coherence capability and the second maximum coherence capability. Wherein the first maximum coherence capability corresponds to the first SRS resource and the second maximum coherence capability corresponds to the second SRS resource. The maximum coherence capability is used to indicate a maximum codebook subset that can be supported by the first communication device. Specifically, the first maximum coherence capability is used to indicate a maximum codebook subset that can be supported by the first communication device when the first SRS resource is employed. The second maximum coherence capability is used to indicate a maximum codebook subset that can be supported by the first communication device when the second SRS resource is employed.

Specifically, the third information is further used for determining a codebook subset corresponding to the first SRS resource and a codebook subset corresponding to the second SRS resource.

By adopting the design, the maximum coherence capability can be reported aiming at the SRS resource, and the base station determines the codebook subset corresponding to the SRS resource according to the maximum coherence capability corresponding to the SRS resource, so that the transmission performance is further improved.

In one possible design, the second SRS resource includes a different number of SRS ports than the first SRS resource.

In one possible design, the first communication device may receive fourth information from the second communication device according to the first codebook subset. The fourth information is used for indicating the TPMI corresponding to the first SRS resource. The first communication device may then determine an interpretation of the fourth information based on the first SRS resource to obtain the TPMI.

In one possible design, the first communication device may send fifth information to the second communication device. The fifth information may be used to indicate a full power TPMI set, where the full power TPMI set is used to characterize a maximum coherence capability corresponding to the first SRS resource and/or the second SRS resource. Therefore, the first communication device can realize implicit indication of maximum coherence capability through the full-power TMPI, and the second communication device determines the codebook subset corresponding to the SRS resource according to the full-power TPMI so as to further improve the transmission efficiency.

By way of example, the set of full power TPMI may include one or more of the following sets of TPMI:

Or alternatively

；

Or alternatively

In one possible design, the SRS resources with the same number of SRS ports included in the plurality of SRS resources correspond to the same maximum coherence capability; or the SRS resources with the same number of the SRS ports contained in the plurality of SRS resources correspond to the same codebook subset. Thereby saving signaling overhead.

In one possible design, SRS resources including SRS ports that meet the first condition in the plurality of SRS resources correspond to a same subset of codebooks; and/or, the SRS resources of which the number of SRS ports does not meet the first condition are included in the plurality of SRS resources correspond to the same codebook subset. This approach may save the signaling overhead of configuring a subset of the codebook compared to configuring a subset of the codebook independently for each SRS resource.

In one possible design, the coherence capability of the first communication device in a maximum transmit antenna port configuration is a partial coherence capability, the maximum transmit antenna port configuration being a maximum number of SRS ports that the first communication device can support. The design can realize flexible configuration of codebook subsets according to the port number of SRS resources. With this configuration, for the case where the number of SRS ports included is the maximum number of ports that the UE can support, the maximum codebook subset for the UE is configured as a partial coherent codeword+noncoherent codeword. Under the capability of the UE, the implementation manner of transmitting SRS on a part of SRS resources is various, and flexible codebook subset configuration and corresponding capability reporting mechanism are required.

In one possible implementation, the above set of full-power TPMI is used to characterize that the first communication device supports a codebook subset configuration corresponding to the first SRS resource being fully coherent and a codebook subset configuration corresponding to the second SRS resource being partially coherent.

In one possible implementation, the first SRS resource includes a number of SRS ports that is less than a number of SRS ports included in the second SRS resource.

In one possible implementation, the first SRS resource includes a number of SRS ports N, where N is an integer greater than 1, and the second SRS resource includes a number of SRS ports K x N, where K is an integer greater than 1.

In one possible implementation, when the first information does not indicate the above-mentioned full power TPMI set, the first SRS resource corresponds to a non-coherent codebook subset configuration and the second SRS resource is supported to correspond to a partially coherent codebook subset configuration.

In one possible implementation, when the first information indicates the second full power TPMI set, the first SRS resources correspond to non-coherent codebook subset configurations and support the second SRS resources correspond to partially coherent codebook subset configurations; the second set of full power TPMI includes:

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In one possible implementation, the first SRS resource and the second SRS resource are configured in the same carrier or within the same partial bandwidth.

In a second aspect, embodiments of the present application provide a communication method, which may be performed by a second communication device. The second communication device may be a base station or a component of a base station.

According to the method, the second communication device may send first information to the first communication device, the first information indicating at least two codebook subsets and at least two SRS resources, wherein each codebook subset is associated with at least one SRS resource of the at least two SRS resources, and each SRS resource of the at least two SRS resources includes an SRS port number greater than 1. The second communication device may also send second information to the first communication device, where the second information is used to indicate a first SRS resource, and the first SRS resource is one SRS resource of the at least two SRS resources. The second communication device may further determine TPMI according to a first codebook subset corresponding to the first SRS resource, where the first codebook subset is one of the at least two codebook subsets.

Specifically, the correspondence between the SRS resource and the codebook subset may be notified through configuration signaling, for example, the configuration signaling indicates an index of the correspondence, or the correspondence may be predefined through a protocol. Specifically, the pre-defining manner of the protocol may be that the protocol is not based on the configuration situation of the SRS resources, and directly defines a codebook subset under different SRS port numbers, or the first information only displays one codebook subset indicating one or more SRS resources, and the codebook subsets of the rest SRS resources are determined according to the indication information and the capability indication information.

In one possible design, the at least two SRS resources further include a second SRS resource, and the second communication device may further receive third information from the first communication device. The third information is used to indicate a first maximum coherence capability corresponding to the first SRS resource and a second maximum coherence capability corresponding to the second SRS resource.

In one possible design, the second communication device may determine a codebook subset corresponding to the first SRS resource and a codebook subset corresponding to the second SRS resource according to the third information.

In one possible design, the second communication device may further send fourth information to the first communication device, where the fourth information is used to indicate the TPMI corresponding to the first SRS resource.

In one possible design, the second communication device may receive fifth information from the first communication device, the fifth information indicating a full power TPMI set, the full power TPMI set being used to characterize a maximum coherence capability corresponding to the first SRS resource and/or the second SRS resource.

In one possible design, the set of full power TPMI includes at least one or more of the following sets of TPMI:

Or alternatively

; Or alternatively

Or alternatively

In one possible design, the SRS resources with the same number of SRS ports included in the plurality of SRS resources correspond to the same maximum coherence capability; or the SRS resources with the same number of the SRS ports contained in the plurality of SRS resources correspond to the same codebook subset.

In one possible design, SRS resources of the plurality of SRS resources having SRS ports that meet the first condition correspond to a same subset of codebooks; and/or, the SRS resources, the number of which does not meet the first condition, in the plurality of SRS resources correspond to the same codebook subset.

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In a third aspect, the present application provides a communication method. The method may be performed by a first communication device. The first communication device may comprise a UE or comprise a component in the UE, such as a chip or the like.

According to the method, the first communication device may send sixth information to the second communication device, where the sixth information is used to indicate a full power TPMI set, and the full power TPMI set is used to characterize a maximum coherence capability corresponding to the first SRS resource and the second SRS resource, where the number of SRS ports included in the first SRS resource is different from the number of SRS ports included in the second SRS resource.

In one possible implementation, the full power TPMI set may include at least one first matrix, where each row of the first matrix corresponds to one transmit antenna port and each column corresponds to one transmission layer; wherein the first matrix has at least two rows of non-zero elements in the same column.

In one possible implementation, the set of full power TPMI includes at least one or more of the following sets of TPMI:

Or alternatively

; Or alternatively

Or alternatively

In one possible embodiment, when the sixth information does not indicate the above-mentioned full power TPMI set, the first SRS resource corresponds to a non-coherent codebook subset configuration and the second SRS resource is supported to correspond to a partially coherent codebook subset configuration.

In one possible implementation, when the sixth information indicates the second full power TPMI set, the first SRS resources correspond to non-coherent codebook subset configurations and support the second SRS resources correspond to partially coherent codebook subset configurations; the second set of full power TPMI includes:

Or/> Or/>Or/>

In a fourth aspect, the present application provides a communication method. The method may be performed by a second communication device. The second communication device may comprise a base station or comprise a component in a base station, such as a chip or the like.

According to the method, the second communication device may receive sixth information from the first communication device, where the sixth information is used to indicate a full power TPMI set, where the full power TPMI set is used to characterize a maximum coherence capability corresponding to the first SRS resource and the second SRS resource, and the number of SRS ports included in the first SRS resource is different from the number of SRS ports included in the second SRS resource. The second communication device may determine the first SRS resource according to the sixth information and/or determine a codebook subset configuration corresponding to the second SRS resource.

In one possible implementation, the full power TPMI set includes at least one first matrix, where each row of the first matrix corresponds to one transmit antenna port and each column corresponds to one transmission layer; wherein the first matrix has at least two rows of non-zero elements in the same column.

Or alternatively

; Or alternatively

Or alternatively

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In a fifth aspect, embodiments of the present application provide a communication method, which may be performed by a first communication device and a second communication device. In particular, a first communication device may be used to perform the method as shown in the first aspect or any of the possible designs of the first aspect, and a second communication device may be used to perform the method as shown in the second aspect or any of the possible designs of the second aspect.

In a sixth aspect, embodiments of the present application provide a communication method, which may be performed by a first communication device and a second communication device. In particular, the first communication device may be adapted to perform the method as shown in any of the possible designs of the third aspect or the third aspect, and the second communication device may be adapted to perform the method as shown in any of the possible designs of the fourth aspect or the fourth aspect.

In a seventh aspect, embodiments of the present application provide a communication device configured to implement the function of the first communication device in the first aspect or each possible design example of the first aspect. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.

In one possible design, the structure of the communication device may include a communication module and a processing module, where these modules may perform the corresponding functions of the first communication device in the foregoing first aspect or each possible design example of the first aspect, and detailed descriptions in method examples are specifically referred to and are not repeated herein.

In one possible design, the communication device includes a processor in its structure, and optionally a communication interface and a memory. The communication interface may be used to transmit and receive information or data, and for the communication device to interact with other communication devices in the network system. The processor is configured to support the communication device to perform the respective functions of the first communication device in the above-described first aspect or each of the possible design examples of the first aspect. The memory is coupled to the processor for storing program instructions and data necessary for the first communication device.

Illustratively, the communication device is a UE or a component in a UE, such as a chip, transceiver, or the like.

In an eighth aspect, an embodiment of the present application provides a communication device configured to implement the function of the second communication device in the second aspect or each possible design example of the second aspect. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.

In one possible design, the structure of the communication device may include a communication module and a processing module, where these modules may perform the corresponding functions of the second communication device in the second aspect or each possible design example of the second aspect, and detailed descriptions in method examples are specifically referred to herein and are not repeated herein.

In one possible design, the communication device includes a processor in its structure, and optionally a communication interface and a memory. The communication interface may be used to transmit and receive information or data, and for the communication device to interact with other communication devices in the network system. The processor is configured to support the communication device to perform the respective functions of the second communication device in the above second aspect or in each of the possible design examples of the second aspect. The memory is coupled to the processor for storing program instructions and data necessary for the first communication device.

Illustratively, the communication device is a base station or a component in a base station, such as a chip, transceiver, or the like.

In a ninth aspect, an embodiment of the present application provides a communication apparatus for implementing the function of the first communication apparatus in each possible design example of the third aspect or the third aspect. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.

In one possible design, the structure of the communication device may include a communication module and a processing module, where these modules may perform the corresponding functions of the first communication device in the foregoing third aspect or each possible design example of the third aspect, and detailed descriptions in method examples are specifically referred to and are not repeated herein.

In one possible design, the communication device includes a processor in its structure, and optionally a communication interface and a memory. The communication interface may be used to transmit and receive information or data, and for the communication device to interact with other communication devices in the network system. The processor is configured to support the communication device to perform the respective functions of the first communication device in each of the possible design examples of the third aspect or the third aspect described above. The memory is coupled to the processor for storing program instructions and data necessary for the first communication device.

In a tenth aspect, an embodiment of the present application provides a communication device for implementing the function of the second communication device in each possible design example of the fourth aspect or the fourth aspect. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.

In one possible design, the structure of the communication device may include a communication module and a processing module, where these modules may perform the corresponding functions of the second communication device in the foregoing fourth aspect or each possible design example of the fourth aspect, and detailed descriptions in method examples are specifically referred to herein and are not repeated herein.

In one possible design, the communication device includes a processor in its structure, and optionally a communication interface and a memory. The communication interface may be used to transmit and receive information or data, and for the communication device to interact with other communication devices in the network system. The processor is configured to support the communication device to perform the respective functions of the second communication device in the fourth aspect or in each of the possible design examples of the fourth aspect. The memory is coupled to the processor for storing program instructions and data necessary for the first communication device.

In an eleventh aspect, embodiments of the present application provide a communication system. The communication system may comprise the communication apparatus of the seventh aspect and the provision above, and comprise the communication apparatus of the eighth aspect provided above. Or the communication system may comprise the communication apparatus of the ninth aspect and the provision above, and the communication apparatus of the tenth aspect and the provision above.

In a twelfth aspect, the present application provides a computer storage medium having a program stored therein or which, when invoked for execution on a computer, causes the computer to perform the above-described or any one of the possible designs of the first aspect, the second aspect or any one of the possible designs of the third aspect or any one of the possible designs of the fourth aspect.

In a thirteenth aspect, the present application provides a computer program product, which may comprise a program or instructions which, when run on a computer, causes the computer to perform the method as described in the first aspect or any one of the possible designs of the first aspect, the second aspect or any one of the possible designs of the third aspect or any one of the possible designs of the fourth aspect or any one of the fourth aspect.

In a fourteenth aspect, the present application provides a chip or a chip system comprising a chip, which may comprise a processor. The chip may also include a memory (or memory module) and/or a transceiver (or communication module). The chip may be adapted to perform the method described in the first aspect or any one of the possible designs of the first aspect, the second aspect or any one of the possible designs of the second aspect, the third aspect or any one of the possible designs of the third aspect, or any one of the possible designs of the fourth aspect or the fourth aspect. The chip system may be formed from the chips described above, or may include the chips described above and other discrete devices such as a memory (or memory module) and/or transceiver (or communication module).

The advantages of the second to fourteenth aspects and possible designs thereof described above may be referred to the description of the advantages of the method described in the first aspect and any possible designs thereof.

Drawings

Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 2 is a schematic diagram of transmitting SRS using a partially coherent antenna port according to an embodiment of the present application;

Fig. 3 is a schematic flow chart of a communication method according to an embodiment of the present application;

fig. 4 is a flow chart of another communication method according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of another communication device according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of another communication device according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of another communication device according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings. The specific method of operation in the method embodiment may also be applied to the device embodiment or the system embodiment.

As shown in fig. 1, a wireless communication system 100 provided in an embodiment of the present application includes a terminal device 101 and a network device 102. The application scenario of the wireless communication system 100 includes, but is not limited to, a New Radio (NR) system in a long term evolution (long term evolution, LTE) system fifth generation (5th generation,5G) mobile communication system, a future mobile communication system, and the like.

By way of example, the terminal device 101 may be a terminal (MS), mobile Station (MS), mobile terminal (mobile station), or the like, or a chip, chip system, or the like, the terminal device 101 being capable of communicating with one or more network devices of one or more communication systems and receiving network services provided by the network devices, including but not limited to the illustrated network device 102. For example, the terminal device 101 in the embodiment of the present application may be a mobile phone (or referred to as a "cellular" phone), a computer with a mobile terminal, etc., and the terminal device 101 may also be a portable, pocket, hand-held, computer-built-in or vehicle-mounted mobile device. The terminal device 101 may also be a communication chip with a communication module. It should be appreciated that the terminal device 101 may be configured to support communication with network devices over the air interface (universal user to network interface, uu air interface) of the general-purpose user and network.

The terminal device 101 shown above may be a User Equipment (UE), a terminal (terminal), an access terminal, a terminal unit, a terminal station, a Mobile Station (MS), a remote station, a remote terminal, a mobile terminal (mobile terminal), a wireless communication device, a terminal agent, a terminal device, or the like. The terminal device may be provided with wireless transceiver functionality that is capable of communicating (e.g., wirelessly communicating) with one or more network devices of one or more communication systems and receiving network services provided by the network devices, including, but not limited to, the illustrated network device 102.

The terminal device 101 may also be a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with wireless communication functionality, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal apparatus in a future 5G network or a terminal apparatus in a future evolved PLMN network, etc.

In addition, the terminal device 101 may be deployed on land, including indoors or outdoors, hand-held or vehicle-mounted; the terminal equipment can also be deployed on the water surface (such as a ship and the like); terminal device 101 may also be deployed in the air (e.g., on an airplane, balloon, satellite, etc.). The terminal device 101 may specifically be a mobile phone (mobile phone), a tablet computer (pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal, an augmented reality (augmented reality, AR) terminal, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned (SELF DRIVING), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (SMART GRID), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (SMART CITY), a wireless terminal in smart home (smart home), or the like. The terminal device may be a communication chip having a communication module, a vehicle having a communication function, or an in-vehicle device (e.g., an in-vehicle communication apparatus, an in-vehicle communication chip), or the like.

Network device 102 may be an access network device (or access network site). The access network device refers to a device that provides a network access function, such as a radio access network (radio access network, RAN) base station, and so on. The network device 102 may specifically include a Base Station (BS), or include a base station, a radio resource management device for controlling the base station, and the like. The network device 102 may also include relay stations (relay devices), access points, base stations in future 5G networks, base stations in future evolved PLMN networks, or NR base stations, etc. Network device 102 may be a wearable device or an in-vehicle device. The network device 102 may also be a chip with a communication module. It should be appreciated that in the present application, the network device 102 may support Uu interface communications.

For example, network device 102 includes, but is not limited to: a next generation base station (G nodeB, gNB) in 5G, an evolved node B (eNB) in an LTE system, a radio network controller (radio network controller, RNC), a radio controller in a CRAN system, a base station controller (base station controller, BSC), a home base station (e.g., home evolved nodeB, or home node B, HNB), a baseband unit (baseBand unit, BBU), a transmission reception point (TRANSMITTING AND RECEIVING point, TRP), a transmission point (TRANSMITTING POINT, TP), a mobile switching center, or the like. The network device 102 may also include future 6G or updated base stations in a mobile communication system.

The network device 102 may access a core network, such as a 5G core network, to obtain services on the core network side.

Based on the architecture shown in fig. 1, network device 102 can indicate SRS resources to terminal device 101. In general, the number of ports (or antennas) included in the SRS resource may correspond to the maximum number of antenna ports that the UE may support, and the network device 102 may also configure ports less than the maximum number of antenna ports, and the terminal device 101 performs SRS transmission on these ports. It should be understood that, unless otherwise specified in the following description, the "ports" refer to ports for transmitting SRS, or ports included in SRS resources. The number of ports included in the SRS resource (or the number of ports included in the SRS resource) may be used to indicate the number of ports included in the SRS resource, for example, if the network device 102 configures a 4-port SRS resource to the terminal 101, the number of ports included in the SRS resource is 4; if the network device 102 configures 2-port SRS resources to the terminal 101, the number of ports included in the SRS resources is 2. The number of SRS ports in one SRS resource represents the time-frequency code domain resources occupied by the SRS resource, and the time-frequency code domain resources occupied by different SRS ports are different. The channels of the SRS ports in the same SRS resource are reversible under a certain condition, which means that the channels of the SRS ports at different moments in time have correlation, or the channels of the SRS ports at different frequency bands at the same moment in time have correlation. In general, one SRS port is transmitted by the same or the same group of UE transmit antennas under a certain condition, when multiple transmit antennas are used to transmit one SRS port, the multiple transmit antennas may use different amplitude phase weights to form a beamformed transmit signal on the SRS port, so as to improve transmission performance.

Network device 102 can also configure multiple SRS resources to terminal device 101, where the number of ports in different SRS resources is different. For example, for a UE with a maximum number of antenna ports of 4 (hereinafter, simply referred to as 4Tx terminal device 101), it indicates the maximum number of transmission layers that the UE can support, or the transmission rank of an uplink signal, or the maximum number of SRS ports that can be configured within one SRS resource is 4. The UE can configure the 4-port SRS resource and the 2-port SRS resource, and the configuration mode can reduce the overhead of the SRS resource.

For example, the period of the 4-port SRS resource allocation is longer, the period of the 2-port SRS resource allocation is shorter, and the network device 102 can respectively learn that the channel on each transmitting antenna port of the terminal device 101 is used for performing accurate channel measurement through the 4-port SRS resource. The 2-port SRS resource can learn that the channels on two virtual transmit antenna ports of the terminal device 101 perform relatively coarse channel measurement, where the virtual transmit antenna ports are antenna ports formed by phase weighting of physical antenna ports, and the virtual transmit antenna ports can form beamforming. For example, a UE having 4 transmission ports (hereinafter, referred to as 2Tx terminal device 101) transmits 1-port SRS, which is formed by phase weighting 2 transmission antennas, and appears to network device 102 as 1 port virtualized, and equivalent channels corresponding to 2 transmission antennas can be obtained.

When a plurality of SRS resources are configured and a Physical Uplink Shared Channel (PUSCH) is scheduled, the network device 102 may further indicate one of the SRS resources through a sounding REFERENCE SIGNAL indication (SRI) field, where the indication information is used to indicate an antenna port used by the terminal device 101 to transmit uplink data, that is, an antenna port used by the terminal device 101 to transmit the SRS on the SRS resource indicated by the indication information, to transmit the uplink data.

Based on SRS measurement, the network device 102 indicates the transmission layer number (Transmission Rank Indicator, TRI) and the transmission precoding matrix indicator (TRANSMITTING PRECODING MATRIX INDICATOR, TPMI) of the PUSCH to the terminal device 101 through downlink control information (downlink control information, DCI), and the terminal device 101 transmits the PUSCH according to the transmission layer number and the TPMI. The TPMI is used to instruct phase weights of multiple transmitting antennas of the terminal device 101, and instructs the terminal device with SRS ports as a reference, that is, the matrix dimension of the TPMI is determined according to the number of SRS ports in the indicated SRS resource, and the number of rows of the matrix is the number of SRS ports (that is, the optimal phase weights between the SRS ports can be determined by the network device 102 station).

The terminal device 101 may report the maximum coherence capability, and the network device 102 configures a codebook subset based on the maximum coherence capability reported by the terminal device 101, where the codebook subset is a set of at least one codeword, and indicates the codeword from the configured codebook subset when scheduling uplink transmission. The maximum coherence capability is used to indicate the largest codebook subset that the UE can support, i.e. the set of all codewords that can be indicated.

It should be appreciated that the maximum coherence capabilities for a 4-port (4 Tx) terminal device 101 include non-coherence (non-coherence) capabilities, partial-coherence (partial-coherence) capabilities, and full-coherence (full-coherence) capabilities. For a 2-port (2 Tx) terminal device 101, the maximum coherence capability includes incoherent capability and fully coherent capability.

If the terminal device 101 is a 2Tx terminal device 101 and has incoherence capability indicating that phase calibration is not completed between 2 transmitting antennas of the terminal device 101, the same layer of data cannot be transmitted by phase weighting, namely: the terminal device 101 can transmit the same layer of data using only one antenna. For non-coherent capable terminal devices only non-coherent codewords can be supported. The base station can only configure a subset of the non-coherent codebook, which can only include non-coherent codewords.

If the terminal device 101 is a 2Tx terminal device 101 and has complete coherence capability, which indicates that phase calibration is completed between the 2 transmit antenna ports of the terminal device 101, phase weighting may be performed, that is: the terminal apparatus 101 may transmit the same layer of data using 2 transmit antennas. For a fully coherent capable terminal device, both non-coherent codewords and fully coherent codewords may be supported. The base station may also configure a subset of incoherent codebooks or a subset of fully coherent + incoherent codebooks, which can include fully coherent codewords and incoherent codewords.

If the terminal device 101 is a 4Tx terminal device 101 and has incoherence capability, it indicates that phase calibration is not completed between the 4 transmitting antennas of the terminal device 101, the same data layer cannot be transmitted by phase weighting, that is, only one antenna port can be used for transmitting data of the same layer. For non-coherent capable terminal devices only non-coherent codewords can be supported. The base station can only configure a subset of the non-coherent codebook, which can only include non-coherent codewords.

If the terminal device 101 is a 4Tx terminal device 101, the partial coherence capability indicates that phase calibration is completed in the transmitting antenna group of the terminal device 101, and phase weighting may be performed, but phase calibration may not be performed between the transmitting antenna groups of the terminal device 101, where one transmitting antenna group includes two antenna ports, for example, 1, 3 antenna ports are one group, and 2, 4 antenna ports are the other group. It is considered that 2 transmit antennas in an antenna group may transmit the same layer of data. For a partially coherent capable terminal device, both non-coherent codewords and partially coherent codewords may be supported. The base station may also configure a subset of non-coherent codebooks or a subset of partially coherent + non-coherent codebooks, the subset of partially coherent codebooks can include partially coherent codewords and non-coherent codewords.

If the terminal device 101 is a 4Tx terminal device 101, the full coherence capability indicates that all the transmitting antennas of the terminal device 101 have completed phase calibration, and phase weighting can be performed, i.e. all the antennas of the terminal device 101 can transmit the same data layer. For a fully coherent capable terminal device, non-coherent and partially coherent codewords and fully coherent codewords may be supported. The base station may also configure a subset of incoherent codebooks or a subset of partially coherent+incoherent codebooks, and may also configure a subset of fully coherent+partially coherent+incoherent codebooks comprising fully coherent codewords+partially coherent codewords and incoherent codewords.

For example, where the terminal device 101 reports that its maximum coherence capability is fully coherent, the network device 102 may indicate a codeword of the fully coherent, partially coherent, or incoherent type, or the network device 102 may indicate a subset of fully coherent codebooks, a subset of partially coherent codebooks, or a subset of incoherent codebooks. For example, the terminal device 101 may report that its maximum coherence capability is partially coherent, the network device 102 may indicate a codeword of a partially coherent or incoherent type, for example, the terminal device 101 may report that its maximum coherence capability is incoherent, and the network device 102 may indicate a codeword of an incoherent type.

Codewords in the codebook are all embodied in the form of a matrix (or called a precoding matrix), wherein the number of rows of the matrix corresponds to the number of antenna ports of the terminal equipment 101, and also can be considered to correspond to the number of SRS ports (the number of columns of the matrix corresponds to the number of layers of uplink transmission, and the values of elements of different rows in the same column indicate phases among different antennas. When the value of the element corresponding to a certain row and column is 0, it indicates that the antenna port corresponding to the row is not used for transmitting the layer, that is, the power of the antenna port on the layer is 0.

As shown in table 1, the precoding matrix W1 for 2-antenna 1 layer uplink transmission is shown.

TABLE 1

It should be understood that in table 1, the codewords shown in TPMI indexes 0 to 1 are incoherent codewords, and the codewords shown in TPMI indexes 2 to 5 are completely coherent codewords.

As shown in table 2, the precoding matrix W2 for 2-antenna 2-layer uplink transmission.

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TABLE 2

It should be understood that in table 2, the codeword shown by TPMI index 0 is a non-coherent codeword, and the codewords shown by TPMI indexes 1 to 2 are fully coherent codewords.

As shown in table 3, a precoding matrix W3 of a discrete fourier transform-spread orthogonal frequency division multiplexing multiple access (orthogonal frequency division multiple, OFDM) (discrete Fourier transform-spread OFDM, DFT-S-OFDM) waveform is employed for 4 antenna 1 layer transmission.

TABLE 3 Table 3

It should be understood that in table 3, the codewords indicated by TPMI indexes 0 to 3 are incoherent codewords, the codewords indicated by TPMI indexes 4 to 11 are partially coherent codewords, and the codewords indicated by TPMI indexes 12 to 27 are fully coherent codewords.

As shown in table 4, a precoding matrix W4 of a Cyclic Prefix (CP) -OFDM (CP-OFDM) waveform is transmitted for the 4-antenna 1 layer.

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TABLE 4 Table 4

It should be understood that in table 4, the codewords indicated by TPMI indexes 0 to 3 are incoherent codewords, the codewords indicated by TPMI indexes 4 to 11 are partially coherent codewords, and the codewords indicated by TPMI indexes 12 to 27 are fully coherent codewords.

As shown in table 5, a precoding matrix W5 of CP-OFDM waveform is used for 4-antenna 2 layer transmission.

TABLE 5

It should be understood that in table 5, the codewords shown in TPMI indexes 0 to 5 are incoherent codewords, the codewords shown in TPMI indexes 6 to 13 are partially coherent codewords, and the codewords shown in TPMI indexes 14 to 21 are fully coherent codewords.

As shown in table 6, a precoding matrix W6 of CP-OFDM waveform is used for 4-antenna 3-layer transmission.

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TABLE 6

It should be understood that in table 6, the codewords indicated by TPMI index 0 are non-coherent codewords, the codewords indicated by TPMI indexes 1 to 2 are partially coherent codewords, and the codewords indicated by TPMI indexes 3 to 6 are fully coherent codewords.

As shown in table 7, a precoding matrix W7 of CP-OFDM waveform is used for 4-antenna 4-layer transmission.

TABLE 7

It should be understood that in table 7, the codewords indicated by TPMI index 0 are non-coherent codewords, the codewords indicated by TPMI indexes 1 to 2 are partially coherent codewords, and the codewords indicated by TPMI indexes 3 to 4 are fully coherent codewords.

As described above, the terminal device 101 may use the same codebook subset when the network device 102 indicates a plurality of SRS resources including different numbers of ports, but when the network device 102 indicates fewer ports for transmitting SRS, the transmission performance of the terminal device 101 using the codebook subset may be limited. The fewer ports included in the SRS resource indicated by the network device 102 for transmitting SRS means that the network device indicates that the SRS resource does not adopt the maximum transmit antenna port configuration, and the maximum transmit antenna port configuration of the terminal device 101 means that the number of ports included in the SRS resource is the maximum number of SRS ports that can be supported by the terminal device 101. For example, the terminal device 101 supports at most 4-port SRS resources, and the SRS resources indicated or configured by the network device 102 are 2-port SRS resources, which may be regarded as fewer ports included in the SRS resources indicated by the network device 102 for transmitting SRS.

For example, when terminal device 101 configured with 4-port SRS resources and 2-port SRS resources, or when terminal device 101 supporting the largest 4-port SRS resources is configured with only 2-port SRS resources, if network device 102 is configured with a partial coherence codebook subset, a problem occurs when the 2-port SRS resources are indicated, because in the case of 2 ports, the codebook subset shown in table 1 or table 2 does not include the partial coherence subset, and at this time, terminal device 101 can only use a non-coherence codebook subset corresponding to the 2-port SRS resources, such as a codeword shown by TPMI index 0 or 1 in table 1, or a codeword shown by TPMI index 0 in table 12, which results in a decrease in transmission performance.

In addition, the PUSCH actual total transmission power of the terminal device 101 defined in the existing mechanism is: the ratio of the number of non-zero antenna ports determined from the currently indicated TPMI to the number of antenna ports configured by network device 102, which may be referred to as a reduction factor, is multiplied by the channel transmit power P _PUSCH,b,f,c(i,j,q_d, l of PUSCH (in decibel milliwatts (dBm)). The non-zero antenna port refers to an antenna port corresponding to a certain row of the codeword when at least one element in the row is not 0. The number of antenna ports configured by the network device 102 refers to the number of ports of an SRS resource when the network device 102 configures one SRS resource, or the number of ports of an SRS resource indicated by the SRI only when the network device 102 configures a plurality of SRS resources.

Each non-zero antenna port would bisect the PUSCH total transmit power, for example, if network device 102 indicated 4-port SRS resources and indicatedThe non-zero antenna port is port 0, the numerator of the reduction factor is 1 denominator is 4, the total transmission power of the actual PUSCH is (1/4) ×p _PUSCH,b,f,c(i,j,q_d, l), and the transmission power on the port 0 is (1/4) ×p _PUSCH,b,f,c(i,j,q_d, l.

Channel transmit power P _PUSCH,b,f,c(i,j,q_d, l) can be defined as the following equation (one), which characterizes PUSCH power value under the combined action of open loop power control and closed loop power control:

where b represents a partial Bandwidth (BWP) occupied by PUSCH transmission, f represents a carrier (carrier) occupied by PUSCH transmission, c represents a serving cell (SERVING CELL) where the carrier is located, and l represents a power control parameter set configured by the network device 102 through higher layer signaling. The following parameters of higher layer signaling configuration may be configured in the power control parameter set:

p _CMAX,f,c (i) is the maximum transmit power allowed by the communication system over a certain band.

P _{O_PUSCH,b,f,c} (j) is a parameter value configured by the network device 102 through higher layer signaling (e.g., radio resource control (radio resource control, RRC) signaling), and when the network device 102 configures a plurality of the parameter values through RRC, the terminal device 101 may further select one of the plurality of parameter values according to DCI, or select one of the plurality of parameter values according to a predefined rule, where the parameter may be understood as a target value of PUSCH transmission power.

Α _a,b,c (j) is a parameter value configured by the network device 102 through higher layer signaling, and when the network device 102 configures a plurality of parameter values through higher layers, the terminal device 101 further selects one of the plurality of parameter values according to a corresponding indication field in the DCI, or selects one of the plurality of parameter values according to a predefined rule, where the parameter may be understood as an adjustment value of PUSCH transmission power.

The number of Resource Blocks (RBs) occupied by PUSCH.

PL _b,f,c(q_d) is determined based on the estimated path loss information of the reference signals (REFERENCE RESOURCE, RS) configured by the network device 102.

The value of Δ _TF,b,f,c (i) is related to the number of transmission layers, and may be related to the number of code blocks (code blocks), the size of the code blocks, the number of REs occupied by PUSCH, and the type of data carried on PUSCH. A delta _TF,b,fc, (i) is calculated byWherein K _S indicates through high-level signaling that the value of BPRE is related to the number of code blocks (code blocks), the size of the code blocks and the number of REs occupied by PUSCH,/>Related to the type of data carried on PUSCH.

F _b,f,c (i, l) is determined from a transmit power command (transmission power control, TPC) indication carried in the DCI, which TPC may be used to indicate the cumulative amount. Exemplary, f _b,f,c(i,l)＝f_b,f,c(i_last,l)+δ_PUSCH,b,f,c(i_last,i,K_PUSCH, l), or may also be used to indicate absolute amounts: f _b,f,c(i,l)＝δ_PUSCH,b,f,c(i_last,i,K_PUSCH, l).

The terminal device 101 may also report its own coherence capabilities to the network device 102, with the network device 102 configuring a subset of the codebook according to the coherence capabilities of the terminal device 101.

For incoherent terminal equipment 101, only codewords of incoherent type, e.g.Or/>The actual transmit power of PUSCH cannot reach p _CMAX,f,c (i). In order to improve the transmission performance of the terminal device 101, the terminal device 101 may report the full power TPMI, where the power reduction factor corresponding to the full power TPMI is 1, and when the full power TPMI is indicated, the actual transmission power of the PUSCH may reach p _CMAX,f,c (i), thereby improving the transmission performance.

Full power TPMI may be selected from tables 1-7 above. When the full power TPMI0 is reported and the base station indicates the TPMI0 through the scheduling signaling, the terminal device 101 may determine the transmission power of the uplink transmission according to the power reduction factor of 1. Thus, the full power TPMI may characterize the transmit power level of the uplink transmission of the terminal device when using the particular TPMI.

For example, in the case of 2-port, the terminal device 101 may reportOr/>When the terminal device 101 reports/>And the network device configures or indicates the TPMI, the maximum transmission power of PUSCH transmission may reach p _CMAX,f,c (i), where the power reduction factor is 1.

For the scenario that the terminal equipment 101 is configured with the 4-port SRS resource and the 2-port SRS resource, if the terminal equipment 101 reports that the maximum coherence capability is the partial coherence capability, when the SRI indicates the 2-port SRS resource and the terminal equipment 101, the uplink transmission power is only 1/2 of the maximum power and the beamforming gain cannot be obtained under the condition that the layer number is 1; or when only 2-port SRS resources are configured for the terminal equipment 101 supporting the largest 4-port, the uplink transmission power is only 1/2 of the largest power under the condition that the layer number is 1, and the beamforming gain cannot be obtained; and the terminal equipment can acquire the beam forming gain and support full power transmission through an antenna virtualization implementation method. For example, the terminal device 101 may map two coherent antennas to the 2-port SRS, that is, only partially coherent antenna ports (for example, port 0 and port 2 shown in fig. 2) are used to transmit SRS, and the corresponding PUSCH may also be transmitted by the same transmission method, where the transmission power of the terminal device 101 may be limited.

When the terminal device 101 is configured with SRS resources of a plurality of different port numbers, in order to improve the transmission performance of the terminal device 101, an embodiment of the present application provides a communication method. The method may be performed by a first communication device and a second communication device.

Specifically, the first communication device may be the terminal device 101 shown in fig. 1 or a component of the terminal device 101, such as a chip, a processing circuit, an antenna, or a transceiver in the terminal device 101, etc. The second communication means may be the network device 102 shown in fig. 1, or a component of the network device 102 shown in fig. 1, such as a chip, processing circuitry, antenna or transceiver of a base station, etc.

As shown in fig. 3, the communication method provided by the embodiment of the present application may include steps shown in S101 to S103:

s101: the second communication device transmits the first information and the second information to the first communication device.

The first information is used for indicating at least two codebook subsets and at least two SRS resources, wherein each codebook subset is associated with at least one SRS resource in the at least two SRS resources, and the number of SRS ports included in each SRS resource in the at least two SRS resources is greater than 1.

Specifically, the first information may include a correspondence table between the codebook subset and the SRS resource as shown in table 10, or include a part of the table shown in table 10 (a part refers to two or more rows in table 8), or include indication information, an index, or the like for indicating table 10 or a part of table 10. It should be appreciated that the first information may also characterize the correspondence of SRS resources and codebook subsets in other forms.

Table 10

The correspondence may be signaled by configuration signaling, such as configuring an index in the signaling table 10, or may be predefined by a protocol. Specifically, the pre-defining manner of the protocol may be that the protocol is not based on the configuration situation of the SRS resources, and directly defines a codebook subset under different SRS port numbers, or the first information only displays one codebook subset indicating one or more SRS resources, and the codebook subsets of the rest SRS resources are determined according to the indication information and the capability indication information. For example, the first information only indicates a codebook subset corresponding to an SRS resource applicable to the maximum SRS port number that the terminal device can support, and for other SRS resources, the codebook subset configuration indicated by the first information and the capability indication information of the terminal device may be determined. The capability indication information is the following third information or fifth information. Specifically, when the first information indicates that the codebook subset corresponding to the 4-port SRS resource is configured as the partial coherence codebook subset, if the terminal device indicates that the terminal device can support the 2-port SRS resource to be configured as the full coherence codebook subset through the third information or the fifth information, the 2-port SRS resource is configured as the full coherence codebook subset by default, and if the terminal device indicates that the terminal device can support the 2-port SRS resource to be configured as the incoherent codebook subset through the third information or the fifth information, the 2-port SRS resource is configured as the incoherent codebook subset by default; when the first information indicates that the codebook subset is the incoherent codebook subset, the codebook subset corresponding to the 4-port SRS resource is configured to be the incoherent codebook subset, and the 2-port SRS resource is configured to be the incoherent codebook subset by default.

Based on table 10, the first information may be used to indicate a codebook subset of each SRS resource, or may indicate a codebook subset corresponding to SRS resources including the same number of ports according to the number of ports included in the SRS resource. In addition, the first information may also indicate a codebook subset of SRS resources, among the plurality of SRS resources, including a number of ports that meets the first condition, or indicate a codebook subset of SRS resources, including a number of ports that does not meet the first condition. Wherein the first condition, for example, the SRS resource includes a port number greater than (or equal to) a port number threshold (e.g., 2); or if the SRS resource adopts the maximum transmit antenna port configuration, for example, the maximum number of transmit ports supported by the first communication device is 4, the first condition may be that the number of ports included in the SRS resource is 4. The SRS resource including 4 SRS ports may correspond to one codebook subset and the SRS resource including 2 SRS ports may correspond to one codebook subset. This approach may save the signaling overhead of configuring a subset of the codebook compared to configuring a subset of the codebook independently for each SRS resource.

In a specific example, in the plurality of SRS resources indicated by the first information, SRS resources including the same number of SRS ports may correspond to the same maximum coherence capability, for example, the maximum coherence capability corresponding to all the 4-port SRS resources indicated by the first information is partially coherent, so as to save signaling overhead for reporting the maximum coherence capability. And/or, in the plurality of SRS resources indicated by the first information, the SRS resources including the same number of SRS ports may correspond to the same codebook subset, for example, the codebook subsets corresponding to all the 4-port SRS resources indicated by the first information are all partial coherence codebook subsets, so as to save signaling overhead of configuring the codebook subsets.

The above first information may carry codebook subset information and SRS resource information in the same field to indicate the association between the codebook subset and the SRS resource, for example, information of "4-port SRS resource 1" and information of "partial coherent codebook subset+incoherent codebook subset" are carried in field 1 to indicate the correspondence between the SRS resource and the codebook subset shown in index 0 in table 10. Or the first information may carry information of the codebook subset in different fields and indicate an association relationship between the codebook subset and the SRS resource, for example, in field 1, the SRS resource is indicated in the order of "4-port SRS resource 1" and "2-port SRS resource 1", and in field 2, the codebook subset is indicated in the order of "partial coherent codebook subset+incoherent codebook subset" and "full coherent codebook subset+incoherent codebook subset", so as to represent the correspondence relationship between the SRS resource and the codebook subset shown by index 0 and index 2. In addition, the first information may further include indexes, such as indexes 0 to 5 shown in table 10, to indicate the correspondence between the SRS resource and the codebook subset, where the correspondence between the SRS resource and the codebook subset indicated by the index may be determined in a preconfigured manner, or indicated by other signaling or fields.

It should be appreciated that at least two SRS resources indicated by the first information have the same function (usage), i.e. are used for codebook-based uplink transmission. In other words, at least two SRS resources indicated by the first information are used for channel measurement of uplink transmission, and a measurement result of the channel measurement is used for the base station to indicate TPMI. Further, it should be appreciated that at least two SRS resources herein should be configured for one CC or a particular range of bandwidths of the first communication device, rather than for codebook-based uplink transmissions by the UE within a different CC or bandwidth.

The second information is used to indicate a first SRS resource, which is one of the at least two SRS resources.

For example, the first information and the second information may be carried in the same signaling. For example, the first information and the second information are respectively different fields in RRC signaling or DCI signaling. Or the first information and the second information may be carried in two different signaling, for example, the second information and the second information are respectively carried in different RRC signaling or DCI signaling.

It should be appreciated that the above first information is associated with the second information, e.g., the first SRS resource indicated by the second information is configured for the first information for indicating one of at least two SRS resources in the first information. Or the first information and the second information are transmitted within a certain period of time. Accordingly, the first communication device receives the first information and the second information.

S102: the first communication device determines the TPMI according to a first codebook subset corresponding to the first SRS resource.

It will be appreciated that the first codebook subset is one of at least two codebook subsets indicated by the first information.

The first communication device may transmit uplink data to the second communication device according to the TPMI.

S103: the second communication device determines the TPMI according to the first codebook subset corresponding to the first SRS resource.

The second communication device may receive uplink data from the first communication device according to the TPMI.

By adopting the method, the second communication device can configure codebook subsets corresponding to the SRS resources respectively to the first communication device, and when the SRS resources are indicated, the indication of the codebook subsets can be realized through the corresponding relation between the SRS resources and the codebook subsets. Therefore, when the number of ports included in the plurality of SRS resources configured by the first communication apparatus are different, and the number of ports included in the SRS resource for transmitting SRS indicated by the second information is smaller than the maximum number of ports supported by the first communication apparatus, uplink transmission performance of the first communication apparatus can be improved.

Illustratively, the first information shown in S101 is at least used to indicate the first SRS resource and the second SRS resource. The number of ports included in the first SRS resource and the second SRS resource may be different, for example, the first SRS resource is a 2-port SRS resource, and the second SRS resource is a 4-port SRS resource.

In one possible example, the first communication device may also send third information to the second communication device. The third information may be used to indicate a first maximum coherence capability (or a maximum coherence capability corresponding to a first SRS resource) and a second maximum coherence capability (or a maximum coherence capability corresponding to a second SRS resource), where the first maximum coherence capability corresponds to the first SRS resource and is used to indicate a maximum codebook subset that can be supported by the first communication device when the first SRS resource is employed; the second SRS resource corresponds to a second SRS resource for indicating a largest subset of codebooks that the first communication device can support when the second SRS resource is employed. Where the maximum coherence capability is, for example, incoherent, partially coherent or fully coherent.

In one possible example, there may be an association between the first maximum coherence capability and the second maximum coherence capability, i.e. the second maximum coherence capability is indicated only when the first maximum coherence capability is indicated as a specific maximum coherence capability. For example, when the first maximum coherence capability indication is a partial coherence capability, there may be a second maximum coherence capability indication, and when the first maximum coherence capability indication is an incoherent capability, there may not be a second maximum coherence capability indication.

In one possible example, the maximum coherence capability of the first communication device of the present invention in the maximum transmit antenna port configuration is a partial coherence capability. That is, for the case where the number of SRS ports included is the maximum number of ports that the UE can support, the maximum codebook subset for the UE is configured as a partial coherent codeword+a non-coherent codeword. Under the capability of the UE, the implementation manner of transmitting SRS on a part of SRS resources is various, and flexible codebook subset configuration and corresponding capability reporting mechanism are required.

It should be appreciated that the third information may be in the same field or in different fields, indicating the first maximum coherence capability and the second maximum coherence capability, respectively. Specifically, the third information may carry information of the first SRS resource and information of the first maximum coherence capability in the same field, and the third information may carry information of the second SRS resource and information of the second maximum coherence capability in the same field.

In this example, the second communication apparatus may determine, according to the third information, a codebook subset corresponding to the first SRS resource and a codebook subset corresponding to the second SRS resource, thereby obtaining a correspondence between some or all of the SRS resources and the codebook subsets shown in table 10 or table 10. For example, when the third information indicates that the first SRS resource is 4-port SRS resource 3 (or all 4-port SRS resources) and the largest codebook subset corresponding to the first SRS resource is a partial coherence codebook subset, the second communication device may determine that the codebook subset of the first SRS resource is a partial coherence codebook subset+an incoherent codebook subset or determine that the codebook subset of the first SRS resource is an incoherent codebook subset. Similarly, when the third information indicates that the second SRS resource is 2-port SRS resource 3 (or all 2-port SRS resources), and the largest codebook subset corresponding to the first SRS resource is a fully coherent codebook subset, the second communication device may determine that the codebook subset of the first SRS resource is a fully coherent codebook subset+an incoherent codebook subset, or determine that the codebook subset of the second SRS resource is an incoherent codebook subset.

In further examples, the first communication device may send fifth information to the second communication device, the fifth information indicating the full power TPMI set. It should be appreciated that the full power TPMI set may characterize a maximum coherence capability corresponding to the first SRS resource and/or the second SRS resource. For example, the terminal device 101 supports the 4-port SRS resource and the 2-port SRS resource, and the terminal device 101 may report the full power TPMI set corresponding to the 4-port SRS resource and the 2-port SRS resource respectively through the fifth information.

In a possible implementation manner, the full-power TPMI set is configured to characterize that the first communication device supports a codebook subset configuration corresponding to a complete coherence of the first SRS resource and supports a codebook subset configuration corresponding to a partial coherence of the second SRS resource, where the number of SRS ports included in the first SRS resource is smaller than the number of SRS ports included in the second SRS resource, where the number of SRS ports included in the first SRS resource is N, N is an integer greater than 1, and the number of SRS ports included in the second SRS resource is K x N, where K is an integer greater than 1.

Or/> Or/>Or/>

In a specific example, the fifth information may indicate a full power TPMI set corresponding to the first SRS resource and indicate a full power TPMI set corresponding to the second SRS resource. Any one or more of the full power TPMI sets G0-G11 shown in table 11 below may be used as the full power TPMI set indicated by the fifth information:

/>

TABLE 11

It should be understood that the above reporting of TPMI sets applies to both SRS resources including 2 SRS ports and SRS resources including 4 SRS ports. Through the reporting of the TPMI set, it may be determined that the SRS resource including 2 SRS ports and the largest codebook subset configuration corresponding to the SRS resource including 4 SRS ports are respectively a partial coherent+incoherent codebook subset configuration and a full coherent+partial coherent+incoherent codebook subset configuration.

After determining the first SRS resource, the first communication device may receive fourth information from the second communication device according to the first codebook subset. The fourth information may be used to indicate the TPMI corresponding to the first SRS resource. In particular, the fourth information may include a precoding matrix indicator field for which the first codebook subset may be used to determine the interpretation, as the TPMI corresponding to each status bit in the precoding indicator field may be different when different codebook subsets are employed. For example, the TPMI field includes 3 bits, and if the first codebook subset is a non-coherent codebook subset, the state bit 010 corresponds to a null value, and if the first codebook subset is a fully coherent codebook subset, the state bit 010 corresponds to a codeword

When the first communication device supports reporting of supporting partial coherence capability and one of G0-G11 in the report 11 is reported, it indicates that the first communication device can support indicating a fully coherent codeword when using 2-port SRS resources and transmit PUSCH with a power reduction factor of 1 (i.e., supporting full power).

When the number of SRS ports included in the SRS resource configured by the terminal device 101 is smaller than the maximum number of SRS ports that can be supported by the terminal device 101, in order to improve the transmission performance of the terminal device 101, the embodiment of the present application provides a communication method. The method may be performed by a first communication device and a second communication device.

As shown in fig. 4, the communication method provided by the embodiment of the present application may include steps shown in S201 to S202:

s201: the second communication device receives sixth information from the first communication device, where the sixth information is used to indicate a full power TPMI set, and the full power TPMI set is used to characterize a maximum coherence capability corresponding to the first SRS resource and the second SRS resource, where the number of SRS ports included in the first SRS resource is different from the number of SRS ports included in the second SRS resource.

/>

In a possible implementation manner, the full-power TPMI set is used to characterize that the first communication device supports that the maximum coherence capability corresponding to the first SRS resource is a full coherence capability and that the maximum coherence capability corresponding to the second SRS resource is a partial coherence capability.

Or/> Or/>Or/>

S202: and the second communication device determines the first SRS resource according to the sixth information reported by the first communication device and/or determines the codebook subset configuration corresponding to the second SRS resource.

Specifically, the first SRS resource and the second SRS resource may be configured in the same SRS resource set at the same time, for example, the SRS resource set includes a plurality of SRS resources with different SRS port numbers, and when the SRI indicates the first SRS resource, the second communication apparatus indicates the TPMI according to the codebook subset corresponding to the first SRS resource, and when the SRI indicates the second SRS resource, the second communication apparatus indicates the TPMI according to the codebook subset corresponding to the second SRS resource.

Alternatively, only one of the first SRS resource or the second SRS resource may be included in one SRS resource set. For example, when the SRS resource set includes only the first SRS resource, the second communication apparatus determines a corresponding codebook subset configuration according to the maximum coherence capability corresponding to the first SRS resource, and indicates TPMI according to the codebook subset configuration; when the SRS resource set includes only the second SRS resource, the second communication apparatus determines a corresponding codebook subset configuration according to the maximum coherence capability corresponding to the second SRS resource, and indicates TPMI according to the codebook subset configuration.

The following specifically describes a communication method provided by the embodiment of the present application, taking the communication system shown in fig. 1 as an example. It should be understood that the terminal device 101 and the network device 102 may perform the actions performed by the first communication apparatus and the second communication apparatus in the above-described method embodiment, respectively.

Embodiment one:

Network device 102 may configure terminal device 101 with multiple sets of SRS resources of different functions, where at least two of the SRS resources are used for codebook-based uplink transmission. In other words, the network device 102 may configure at least two SRS resources for the terminal device 101, the at least two SRS resources being mainly used for channel measurement of uplink transmission, and the network device 102 may indicate TPMI according to a measurement result of the channel measurement. When a plurality of SRS resources are configured under the function, SRS resources with the same port number can be configured to correspond to the same codebook subset configuration, and the codebook subsets corresponding to the SRS resources with different port numbers are configured independently, namely the SRS resources with different port numbers correspond to different codebook subset configurations. The codebook subset configuration may be indicated by higher layer signaling, such as RRC signaling or Medium Access Control (MAC) Control Element (CE) signaling.

The codebook subsets corresponding to different SRS resources may be indicated by two fields in RRC/MAC CE signaling, and each codebook subset configuration need may be pre-agreed or configured with SRS resources corresponding to the codebook subset through signaling, for example, the two fields may be regarded as the first information described above.

For example, field 1 in RRC signaling is used to indicate the codebook subset corresponding to all 4-port SRS resources, e.g., the codebook subset corresponding to all 4-port SRS resources may be configured as a partial coherent+incoherent codebook subset or as an incoherent codebook subset. Further, field 2 in RRC signaling may be used to indicate a codebook subset for all 2-port SRS resources, e.g., the codebook subset for all 2-port SRS resources may be configured as a full coherent+incoherent codebook subset or as an incoherent codebook subset.

According to the above configuration, when the second information (such as the SRI field) indicates the 4-port SRS resource, the network device 102 performs precoding indicated in the codebook subset corresponding to the 4-port SRS resource, for example, when field 1 in RRC signaling is configured as a partial coherence+incoherent codebook subset, the TPMI indicated by the network device 102 may be one of TPMI 0-11 in table 4, so that the terminal device 101 needs to determine the decoding of the precoding indication field according to the number of ports included in the SRS resource indicated by the SRI field and the corresponding codebook subset configuration, because the TPMI corresponding to each status bit in the precoding indication field under different codebook subset configurations may be different.

In addition, the terminal device 101 may also report the coherence capability under different SRS port number configurations through a protocol definition, that is, send the third information. For example, the terminal device 101 reports the coherence capability for the 4-port SRS resource and the 2-port SRS resource, for example, the partial coherence capability corresponding to the 4-port SRS resource and the complete coherence capability corresponding to the 2-port SRS resource are reported respectively, and then the network device 102 may directly determine the codebook subset configuration corresponding to the SRS resource according to the capability reported by the terminal device 101.

The terminal device 101 may also report a full power TPMI, where the full power TPMI may be used to indicate a maximum coherence capability of the terminal device 101 under multiple SRS resources, so that the coherence capability that can be supported under different SRS port numbers may be implicitly indicated.

With the above configuration, after the network device 102 indicates an SRS resource, the terminal device 101 and the network device 102 may determine TPMI according to the codebook subset corresponding to the SRS resource, which is used for performing uplink data transmission, so as to improve transmission performance.

Embodiment two:

Network device 102 can configure terminal device 101 with multiple sets of SRS resources of different functionality. When the number of the SRS resources for uplink transmission based on the codebook is multiple, the SRS resources configured by the largest transmitting antenna port can be configured to correspond to the same codebook subset configuration, and the codebook subsets corresponding to the rest of the SRS resources are all configured independently, that is, correspond to different codebook subset configurations, and the codebook subset configurations can be indicated by higher layer signaling, such as RRC signaling or MAC CE signaling. Different codebook subset configurations are indicated by multiple fields (i.e., first information) in the RRC/MAC CE signaling, and each codebook subset configuration requires pre-provisioning or configuration of SRS resources corresponding to that subset.

For example, field 1 in RRC signaling is used to indicate a codebook subset corresponding to all SRS resources with the largest number of ports (e.g., for 4Tx terminal device 101, the 4-port SRS resources), and for example, the codebook subset corresponding to all SRS resources with the largest number of ports may be configured as a partial coherent+noncoherent codebook subset or as a noncoherent codebook subset. Field 2 and field 3 (or more) in RRC signaling are used to indicate two (or more) SRS resources that do not employ the maximum number of ports (e.g., a codebook subset corresponding to 2-port SRS resources for 4Tx terminal device 101), respectively. For example, SRS resource 1 that does not employ the maximum number of ports may be configured as a complete coherent+noncoherent codebook subset and SRS resource 2 that does not employ the maximum number of ports may be configured as a noncoherent codebook subset. The reason for supporting such flexible configuration is that the transmission manner of SRS resources not employing the maximum number of ports may be determined according to different codebook subset configurations. For example, when the 2-port SRS resource is configured as a complete coherent+incoherent codebook subset, the terminal device 101 may map two coherent antenna ports onto two SRS ports, and when the 2-port SRS resource is configured as an incoherent codebook subset, the terminal device 101 may map two coherent antenna ports onto one SRS antenna port after being virtualized, and then map the other two coherent antenna ports onto the other SRS antenna port after being virtualized.

According to the above configuration, when the SRI field indicates an SRS resource of any maximum port number, the network device 102 precodes indicated from a codebook subset corresponding to the SRS resource employing the maximum port number. For example, for the 4Tx terminal device 101, when configured as a non-coherent codebook subset, the TPMI indicated by the network device 102 is one of TPMI 0-3 in table 4, so that the terminal device 101 needs to determine the interpretation of the precoding indication field according to the number of ports and the corresponding codebook subset configuration of the SRS resource indicated by the SRI field, because the TPMI corresponding to each status bit in the precoding indication field under different codebook subset configurations may be different.

In addition, the coherence capability under different SRS port number configurations may also be respectively reported by the terminal device 101 through a protocol definition, for example, the terminal device 101 may report the coherence capability for an SRS resource with the largest port number (for example, for the 4Tx terminal device 101, the 4 port SRS resource) and an SRS resource without the largest port number (for example, for the 4Tx terminal device 101, the codebook subset corresponding to the 2 port SRS resource), that is, send the third information, and then the network device 102 may directly determine the codebook subset configuration corresponding to the SRS resource according to the capability reported by the terminal device 101.

Terminal equipment 101 may also report full power TPMI, e.g., full power TPMI when the maximum number of ports SRS resources are employed and full power TPMI when the maximum number of ports SRS resources are not employed. The full power TPMI may be used to indicate the maximum coherence capability of terminal device 101 under multiple SRS resources, and thus may implicitly indicate the coherence capability that can be supported under different SRS port numbers.

With the above configuration, after the network device 102 indicates an SRS resource, the terminal device 101 and the network device 102 may determine TPMI according to the codebook subset corresponding to the SRS resource, which is used for performing uplink data transmission, so as to improve transmission performance. The SRS resource which does not adopt the maximum port number can adopt different mapping modes to support full-power transmission, so that SRS resource overhead is reduced on the premise of not influencing uplink transmission performance.

Embodiment III:

Network device 102 can configure terminal device 101 with multiple sets of SRS resources of different functionality. When the number of the SRS resources for uplink transmission based on the codebook is multiple, the SRS resources configured by the maximum transmitting antenna port may be configured to correspond to the same codebook subset configuration, and the codebooks corresponding to the rest of the SRS resources are determined according to the reporting capability of the terminal device 101. According to the above configuration, when the second information (e.g., SRI) field indicates the 4-port SRS resource, the network device 102 may indicate precoding from the codebook subset corresponding to the 4-port SRS resource, and when the second information field indicates the 2-port SRS resource, the network device 102 may indicate precoding from the codebook subset corresponding to the 2-port SRS resource, so that the terminal device 101 needs to determine the interpretation of the precoding indication field according to the number of ports of the SRS resource indicated by the SRI field and the corresponding codebook subset configuration.

In addition, the coherence capability under different SRS port number configurations can be respectively reported by the terminal device 101 through protocol definition. For example, the terminal device 101 may report coherence capability for the 4-port SRS resource and the 2-port SRS resource, for example, partial coherence capability corresponding to the 4-port SRS resource and complete coherence capability corresponding to the 2-port SRS resource, so that the network device 102 may directly determine a corresponding codebook subset configuration according to the capability reported by the terminal device 101, directly determine a codebook subset adopted by the 2-port SRS resource (i.e., a complete coherence codebook subset corresponding to the 2-port SRS resource), and may subsequently indicate the codebook subset to the terminal device 101, and use the codebook subset for uplink transmission when the 2-port SRS resource is adopted.

Terminal equipment 101 may also report full power TPMI, e.g., full power TPMI with 4-port SRS resources and full power TPMI with 2-port SRS resources. The full power TPMI may be used to indicate the maximum coherence capability of terminal device 101 under multiple SRS resources, and thus may implicitly indicate the coherence capability that can be supported under different SRS port numbers.

With the above configuration, the codebook subset including SRS resources with a larger number of ports may be determined according to the codebook subset configuration indication, and the codebook subset including SRS resources with a smaller number of ports may be determined directly according to the codebook subset configuration and the coherence capability reported by the terminal device 101.

Based on the same inventive concept as the above method embodiments, the present embodiments also provide a communication device that may be provided with the functions or steps or operations of the first communication device or the second communication device in the above method embodiments. For example, functional modules corresponding to the functions or steps or operations of the methods described above may be provided in a communication device to support the communication device to perform the methods described above. The functions may be implemented by hardware, or may be implemented by software or hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above. The communication means may be, for example, a chip or a communication chip with a communication module, or be implemented by a chip or a communication chip with a communication module.

In one possible implementation, the communication device 500 shown in fig. 5 may be used as the first communication device according to the above method embodiment, where the steps performed by the first communication device in the above method embodiment are performed. As shown in fig. 5, the communication device 500 may include a communication module 501 and a processing module 502, where the communication module 501 and the processing module 502 are coupled to each other. The communication module 501 may be used to support the communication device 500 to perform communication, and the communication module 501 may have a wireless communication function, for example, to perform wireless communication with other communication devices through a wireless air interface. The processing module 502 may be used to support the communication device 500 to perform the processing actions in the method embodiments described above, including but not limited to: generates information, messages, etc., sent by the communication module 501, and/or demodulates and decodes signals received by the communication module 501, etc.

The above communication module 501 is specifically configured to perform actions of transmitting and/or receiving by the first communication device in the communication method shown in fig. 3. For example, the communication module 501 may be configured to perform an action of the first communication device to send information, messages, or signaling, or to perform an action of receiving information, messages, or signaling from the network device.

The above processing module 502 may be specifically configured to perform the processing actions of the first communication device in the communication method shown in fig. 3, for example, to control the communication module 501 to perform operations of receiving and/or sending information, messages or signaling, and performing processing of information.

In implementing the method of fig. 3, the communication module 501 may be configured to receive the first information and the second information from the second communication device. The respective implementation of the first information and the second information may be found in the description of the first information and the second information, respectively, of the embodiment part of the method described above. The processing module 502 may be configured to determine the TPMI according to a first codebook subset corresponding to the first SRS resource indicated by the second information, where the first codebook subset is one of the at least two codebook subsets.

In one possible design, the at least two SRS resources further include a second SRS resource, and the communication module 501 may further send third information to the second communication device. The implementation of the third information can be seen from the description of the third information in the method embodiment section.

In one possible design, the third information is further used to determine a codebook subset corresponding to the first SRS resource and a codebook subset corresponding to the second SRS resource.

In one possible design, communication module 501 (or processing module 502) may receive fourth information from the second communication device according to the first codebook subset. The fourth information is used for indicating the TPMI corresponding to the first SRS resource. The first communication device may then determine an interpretation of the fourth information based on the first SRS resource to obtain the TPMI.

In one possible design, the communication module 501 may also send fifth information to the second communication device. The fifth information may be used to indicate a full power TPMI set. Possible implementation manners of the full-power TPMI set may be referred to the description of the full-power TPMI set in the foregoing method embodiment section.

In one possible design, SRS resources including SRS ports that meet the first condition in the plurality of SRS resources correspond to a same subset of codebooks; and/or, the SRS resources of which the number of SRS ports does not meet the first condition are included in the plurality of SRS resources correspond to the same codebook subset.

In one possible design, the coherence capability of the communication device in a maximum transmit antenna port configuration, which is the maximum number of SRS ports that the first communication device can support, is a partial coherence capability.

Or/> Or/>Or/>

In implementing the method shown in fig. 4, the communication module 501 may be configured to send sixth information to the second communication device, where the sixth information is used to indicate the set of full-power TPMI. For implementation of the sixth information, reference may be made to the description of the sixth information by the method embodiment.

In another possible implementation manner, the communication device provided by the embodiment of the present application may also be formed by hardware components, such as a processor, a memory, or a transceiver, etc. For ease of understanding and ease of illustration, a possible configuration of the first communication device is illustrated in fig. 6 using a cellular phone as an example. As shown in fig. 6, a communication device 600 may include a processor 601, a memory 602, and a transceiver 603.

The above processor 601 may be used to process communication protocols and communication data, as well as to control the first communication device, execute software programs, process data of software programs, etc. The memory 602 may be used to store programs and data based on which the processor 601 may perform the methods performed by the first communication device in embodiments of the present application.

The transceiver 603 may include a radio frequency unit and an antenna. The radio frequency unit can be used for converting the baseband signal and the radio frequency signal and processing the radio frequency signal. The antenna may be used to transmit and receive radio frequency signals in the form of electromagnetic waves. In addition, the radio frequency unit may be regarded as the transceiver 603, and the communication device 600 may include the processor 601, the memory 602, the transceiver 603 and the antenna.

In addition, the communication device 600 may also include an input-output device 604, such as a touch screen, display screen, or keyboard, for example, that may be used to receive data entered by a user and to output data to the user. It should be noted that some kinds of communication devices may not have an input/output device.

Based on the structure shown in fig. 6, when the communication device 600 needs to transmit data, the processor 601 may perform baseband processing on the data to be transmitted, and then output a baseband signal to the radio frequency unit, and the radio frequency unit performs radio frequency processing on the baseband signal and then transmits the radio frequency signal in the form of electromagnetic waves through the antenna. When data is transmitted to the communication device 600, the radio frequency unit receives a radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 601, and the processor 601 converts the baseband signal into data and processes the data.

Illustratively, the processor 601 may be used to perform the steps performed by the processing module 502 shown in FIG. 5. The transceiver 603 may be used to perform the steps performed by the communication module 501 shown in fig. 5.

Specifically, the transceiver 603 may be configured to receive the first information and the second information from the second communication device. The respective implementation of the first information and the second information may be found in the description of the first information and the second information, respectively, of the embodiment part of the method described above. The processor 601 may be configured to determine TPMI according to a first codebook subset corresponding to a first SRS resource indicated by the second information, where the first codebook subset is one of the at least two codebook subsets.

In one possible design, the at least two SRS resources may further include a second SRS resource, and the transceiver 603 may further transmit third information to the second communication device. The implementation of the third information can be seen from the description of the third information in the method embodiment section.

In one possible design, transceiver 603 (or processor 601) may receive fourth information from the second communication device according to the first codebook subset. The fourth information is used for indicating the TPMI corresponding to the first SRS resource. The first communication device may then determine an interpretation of the fourth information based on the first SRS resource to obtain the TPMI.

In one possible design, the transceiver 603 may also send fifth information to the second communication device. The fifth information may be used to indicate a full power TPMI set. Possible implementation manners of the full-power TPMI set may be referred to the description of the full-power TPMI set in the foregoing method embodiment section.

Or/> Or/>Or/>

In implementing the method shown in fig. 4, transceiver 603 may be configured to send sixth information to the second communication device, where the sixth information is used to indicate the set of full-power TPMI. For implementation of the sixth information, reference may be made to the description of the sixth information by the method embodiment.

In a possible implementation manner, the communication device 700 shown in fig. 7 may be used as the second communication device according to the above method embodiment, and the steps performed by the second communication device in the above method embodiment are performed. As shown in fig. 7, the communication device 700 may include a communication module 701 and a processing module 702, where the communication module 701 and the processing module 702 are coupled to each other. The communication module 701 may be used to support communication with the communication device 700, and the communication module 701 may have a wireless communication function, for example, may be capable of performing wireless communication with other communication devices through a wireless air interface. The processing module 702 may be used to support the communication device 700 to perform the processing actions described above in the method embodiments, including, but not limited to: generates information, messages, and/or demodulates and decodes signals received by communication module 701, etc.

The above communication module 701 is specifically configured to perform actions of transmitting and/or receiving by the second communication device in the communication method shown in fig. 3. For example, the communication module 701 may be configured to perform an action of sending information, messages, or signaling by the second communication device, or to perform an action of receiving information, messages, or signaling from the network device.

The above processing module 702 may be specifically configured to perform processing actions of the second communication device in the communication method shown in fig. 3, for example, to control the communication module 701 to perform operations of receiving and/or sending information, messages or signaling, and performing processing of information.

In implementing the method shown in fig. 3, the communication module 701 may be configured to send the first information and the second information. The respective implementation of the first information and the second information may be found in the description of the first information and the second information, respectively, of the embodiment part of the method described above. The processing module 702 may be configured to determine TPMI according to a first codebook subset corresponding to a first SRS resource indicated by the second information, where the first codebook subset is one of the at least two codebook subsets.

In one possible design, the at least two SRS resources further include a second SRS resource, and the communication module 701 may further receive third information from the first communication device. The implementation of the third information can be seen from the description of the third information in the method embodiment section.

In one possible design, processing module 702 may also determine a codebook subset corresponding to the first SRS resource and a codebook subset corresponding to the second SRS resource according to the third information.

In one possible design, communication module 701 may further send fourth information to the first communication device, where the fourth information is used to indicate the TPMI corresponding to the first SRS resource.

In one possible design, the communication module 701 may receive fifth information from the first communication device, where the fifth information is used to indicate a full power TPMI set. The implementation of the full power TPMI set may be found in the description of the full power TPMI set in the method embodiment section above.

Or/> Or/>Or/>

In implementing the method shown in fig. 4, the communication module 601 may be configured to receive a sixth message from the first communication device, where the sixth message is used to indicate the set of full-power TPMI. For implementation of the sixth information, reference may be made to the description of the sixth information by the method embodiment. The processing module 602 may be configured to determine the first SRS resource according to the sixth information and/or determine a codebook subset configuration corresponding to the second SRS resource.

In another possible implementation manner, the communication device provided by the embodiment of the present application may further be configured by hardware components, such as a processor, a memory, or a transceiver, etc., to implement the functions of the second communication device in the present application.

For ease of understanding, the structure of the communication device is illustrated in fig. 8 by a base station. As shown in fig. 8, the communication device 800 may include a transceiver 801, a memory 802, and a processor 803 to implement the functions of the second communication device provided in the embodiment of the present application. The transceiver 801 may be used for communication by a communication device. The memory 802 is coupled to the processor 803 and is operable to store programs and data necessary for the communication device 800 to perform various functions. The processor 803 is configured to support the communication apparatus 800 to perform the functions corresponding to the network devices in the above-described method, which functions may be implemented by calling a program stored in the memory 802.

In particular, the transceiver 801 may be a wireless transceiver that may be used to support the communication device 800 in receiving and transmitting signaling and/or data over a wireless air interface. The transceiver 801 may also be referred to as a transceiver unit or a communication unit, and the transceiver 801 may include a radio frequency unit, such as a remote radio frequency unit (remote radio unit, RRU), particularly for transmission of radio frequency signals and conversion of radio frequency signals to baseband signals, and one or more antennas particularly for radiation and reception of radio frequency signals. Alternatively, the transceiver 801 may include only the above radio frequency units, and the communication apparatus 800 may include the transceiver 801, the memory 802, the processor 803, and the antenna at this time.

The memory 802 and the processor 803 may be integrated or independent. As shown in fig. 8, the memory 802 and the processor 803 may be integrated with a control unit 810 of the communication device 800. For example, the control unit 810 may include a baseband unit (BBU) of the LTE base station, which may also be referred to as a Digital Unit (DU), or the control unit 810 may include a Distributed Unit (DU) and/or a centralized unit (centralized unit, CU) in the base station under the 5G and future radio access technologies. The control unit 810 may be configured by one or more single boards, where the multiple single boards may support radio access networks of a single access system (such as an LTE network), and the multiple single boards may also support radio access networks of different access systems (such as an LTE network, a 5G network, or other networks). The memory 802 and processor 803 may serve one or more boards. That is, the memory 802 and the processor 803 may be separately provided on each board. It is also possible that multiple boards share the same memory 802 and processor 803. Furthermore, each board may have necessary circuitry disposed thereon, such as may be used to implement the coupling of memory 802 and processor 803. The connections between the above transceiver 801, the processor 803, and the memory 802 may be made through a bus (bus) structure and/or other connection medium.

Based on the structure shown in fig. 8, when the communication device 800 needs to transmit data, the processor 803 may perform baseband processing on the data to be transmitted and output a baseband signal to the radio frequency unit, where the radio frequency unit performs radio frequency processing on the baseband signal and then transmits the radio frequency signal in the form of electromagnetic waves through the antenna. When data is transmitted to the communication device 800, the radio frequency unit receives a radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 803, and the processor 803 converts the baseband signal into data and processes the data.

The processor 803 is illustratively operable to perform the steps performed by the processing module 702 of fig. 7. The transceiver 801 may be used to perform the steps performed by the communication module 701 shown in fig. 7.

In implementing the communication method shown in fig. 3, the transceiver 801 may be used to transmit the first information as well as the second information. The respective implementation of the first information and the second information may be found in the description of the first information and the second information, respectively, of the embodiment part of the method described above. The processor 803 may be configured to determine TPMI according to a first codebook subset corresponding to the first SRS resource indicated by the second information, where the first codebook subset is one of the at least two codebook subsets.

In one possible design, the at least two SRS resources may further include a second SRS resource, and the transceiver 801 may further receive third information from the first communication device. The implementation of the third information can be seen from the description of the third information in the method embodiment section.

In one possible design, the processor 803 may further determine a codebook subset corresponding to the first SRS resource and a codebook subset corresponding to the second SRS resource according to the third information.

In one possible design, transceiver 801 may further send fourth information to the first communication device, where the fourth information is used to indicate the TPMI corresponding to the first SRS resource.

In one possible design, transceiver 801 may receive fifth information from the first communication device indicating a full power TPMI set. The implementation of the full power TPMI set may be found in the description of the full power TPMI set in the method embodiment section above.

Or/> Or/>Or/>

In implementing the method of fig. 4, transceiver 801 may be configured to receive a sixth message from the first communication device, where the sixth message is used to indicate a full power TPMI set. For implementation of the sixth information, reference may be made to the description of the sixth information by the method embodiment. The processor 803 may be configured to determine the first SRS resource according to the sixth information and/or determine a codebook subset configuration corresponding to the second SRS resource.

In addition, according to the actual use requirement, the communication device provided by the embodiment of the application can include a processor, and the processor invokes an external transceiver and/or a memory to realize the functions or steps or operations. The communication device may also include a memory that is invoked by the processor and executes a program stored in the memory to perform the functions or steps or operations described above. Alternatively, the communication device may include a processor, i.e., a transceiver, and the processor invokes and executes a program stored in an external memory to perform the functions or steps or operations described above. Or the communication device may also include a processor, memory, and transceiver.

Based on the same concept as the above method embodiments, a computer readable storage medium is further provided in the embodiments of the present application, where a program instruction (or called a computer program, an instruction) is stored, where the program instruction when executed by a processor causes the computer to perform the operations performed by the first communication device and/or the second communication device in any one of the possible implementation manners of the above method embodiments, method embodiments.

Based on the same conception as the above method embodiments, the present application also provides a computer program product comprising program instructions which, when being invoked by a computer for execution, may cause the computer to carry out the operations performed by the first communication device and/or the second communication device in any one of the possible implementations of the above method embodiments.

Based on the same conception as the above method embodiments, the present application also provides a chip or a chip system, the chip being coupled with a transceiver for implementing the operations performed by the first communication device and/or the second communication device in any one of the possible implementations of the method embodiments. The chip system may include the chip, as well as components including memory, communication interfaces, and the like.

Based on the same conception as the above method embodiments, the present application also provides a communication system which may be used to implement the operations performed by the first communication device and/or the second communication device in any one of the possible implementations of the method embodiments. Illustratively, the communication system has an architecture as shown in fig. 1.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may 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, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. A method of communication, comprising:

the method comprises the steps that a first communication device receives first information from a second communication device, wherein the first information is used for indicating at least two codebook subsets and at least two SRS resources, each codebook subset is associated with at least one SRS resource in the at least two SRS resources, and the number of SRS ports included in each SRS resource in the at least two SRS resources is larger than 1;

The first communication device receives second information from the second communication device, wherein the second information is used for indicating a first SRS resource, and the first SRS resource is one SRS resource in the at least two SRS resources;

The first communication device determines a TPMI according to a first codebook subset corresponding to the first SRS resource, where the first codebook subset is one of the at least two codebook subsets;

the at least two SRS resources further include a second SRS resource, the method further comprising:

The first communication device sends third information to the second communication device, wherein the third information is used for indicating a first maximum coherence capability and a second maximum coherence capability, the first maximum coherence capability corresponds to the first SRS resource, the second maximum coherence capability corresponds to the second SRS resource, and the maximum coherence capability is used for indicating a maximum codebook subset which can be supported by the first communication device.

2. The method of claim 1, wherein the third information is further for determining a codebook subset corresponding to the first SRS resource and a codebook subset corresponding to the second SRS resource.

3. The method of claim 1, wherein the second SRS resource comprises a different number of SRS ports than the first SRS resource.

4. The method as recited in claim 1, further comprising:

The first communication device receives fourth information from the second communication device according to the first codebook subset, wherein the fourth information is used for indicating the TPMI corresponding to the first SRS resource.

5. The method as recited in claim 1, further comprising:

the first communication device sends fifth information to the second communication device, wherein the fifth information is used for indicating a full power TPMI set, and the full power TPMI set is used for representing the maximum coherence capability corresponding to the first SRS resource and/or the second SRS resource.

6. The method as recited in claim 5, further comprising:

the set of full power TPMI includes at least one or more of the following sets of TPMI:

Or alternatively

7. The method of claim 5 or 6, wherein the set of full power TPMI is to characterize the first communication device as supporting a codebook subset configuration for the first SRS resource corresponding to full coherence and as supporting a codebook subset configuration for the second SRS resource corresponding to partial coherence;

the number of SRS ports included in the first SRS resource is smaller than the number of SRS ports included in the second SRS resource.

8. The method of claim 1, wherein the same number of SRS ports included in the at least two SRS resources corresponds to the same maximum coherence capability; or alternatively

And the SRS resources with the same number of SRS ports contained in the at least two SRS resource packets correspond to the same codebook subset.

9. The method of any of claims 1-6 or 8, wherein SRS resources included in the at least two SRS resources that have a number of SRS ports that meets a first condition correspond to a same subset of codebooks; and/or the number of the groups of groups,

And the SRS resources, the number of which does not meet the first condition, of which is included in the at least two SRS resources correspond to the same codebook subset.

10. The method of any of claims 1-6 or 8, wherein the coherence capability of the first communication device in a maximum transmit antenna port configuration is a partial coherence capability, the maximum transmit antenna port configuration being a maximum number of SRS ports that can be supported by the first communication device.

11. A method of communication, comprising:

The second communication device sends first information to the first communication device, wherein the first information is used for indicating at least two codebook subsets and at least two SRS resources, each codebook subset is associated with at least one SRS resource in the at least two SRS resources, and the number of SRS ports included in each SRS resource in the at least two SRS resources is larger than 1;

The second communication device sends second information to the first communication device, wherein the second information is used for indicating a first SRS resource, and the first SRS resource is one SRS resource in the at least two SRS resources;

The second communication device receives third information from the first communication device, wherein the third information is used for indicating a first maximum coherence capability and a second maximum coherence capability, the first maximum coherence capability corresponds to the first SRS resource, the second maximum coherence capability corresponds to the second SRS resource, and the maximum coherence capability is used for indicating a maximum codebook subset which can be supported by the first communication device.

12. The method of claim 11, wherein the second communication device determines a subset of codebooks corresponding to the first SRS resources and a subset of codebooks corresponding to the second SRS resources based on the third information.

13. The method of claim 11, wherein the second SRS resource comprises a different number of SRS ports than the first SRS resource.

14. The method as recited in claim 11, further comprising:

The second communication device sends fourth information to the first communication device, where the fourth information is used to indicate the TPMI corresponding to the first SRS resource.

15. The method as recited in claim 11, further comprising:

The second communication device receives fifth information from the first communication device, where the fifth information is used to indicate a full power TPMI set, and the full power TPMI set is used to characterize a maximum coherence capability corresponding to the first SRS resource and/or the second SRS resource.

16. The method as recited in claim 15, further comprising:

Or alternatively

17. The method of claim 14 or 15, wherein the set of full power TPMI is used to characterize that the first communication device supports a codebook subset configuration for which the first SRS resource corresponds to fully coherent and supports a codebook subset configuration for which the second SRS resource corresponds to partially coherent;

18. The method according to any one of claims 11-16, wherein the SRS resources of the at least two SRS resources that include the same number of SRS ports correspond to the same maximum coherence capability; or alternatively

And the SRS resources with the same number of SRS ports contained in the at least two SRS resources correspond to the same codebook subset.

19. The method of any of claims 11-16, wherein SRS resources of the at least two SRS resources having SRS ports that meet a first condition correspond to a same subset of codebooks; and/or the number of the groups of groups,

And the SRS resources of which the SRS port numbers do not meet the first condition in the at least two SRS resources correspond to the same codebook subset.

20. A communication device comprising means or modules for performing the method of any of claims 1-10.

21. A communication device comprising means or modules for performing the method of any of claims 11-18.

22. A communication device, comprising:

a transceiver for communicating with the communication device;

A processor for executing program instructions stored in a memory for performing the method of any one of claims 1-10.

23. A communication device, comprising:

a transceiver for communicating with the communication device;

a processor for executing program instructions stored in a memory for performing the method of any one of claims 11-18.

24. A communication system comprising a communication device according to claim 20 or 22 and a communication device according to claim 21 or 23.

25. A chip comprising a processor for executing program instructions stored in a memory, performing the method of any one of claims 1-18.