Communication method and communication apparatus

Abstract

Provided in the present application are a communication method and a communication apparatus. The method may comprise: receiving first indication information, which indicates a first index value, wherein the first index value indicates a transmitted rank corresponding to uplink data and a plurality of transmitted precoding matrix indicator (TPMI) indexes associated with the transmitted rank; and on the basis of the first indication information, transmitting the uplink data. In the present application, a transmitted rank corresponding to uplink data and a plurality of TPMI indexes associated with the transmitted rank can be indicated by means of an index in indication information, thereby reducing the signaling overhead required by network devices for indicating a transmitted rank and TPMIs.

Description

A communication method and a communication apparatus

[0001] The present application claims priority to the Chinese patent application No. 202410868857.9, filed on June 28, 2024, and entitled "A communication method and a communication apparatus", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of communication, and more particularly, to a communication method and a communication apparatus. BACKGROUND

[0003] Multiple input and multiple output (MIMO) is a core technology of long term evolution (LTE) and new radio (NR) systems. By configuring multiple antennas at the transmitting end and / or the receiving end and through reasonable signal processing such as precoding, parallel transmission of multiple data streams can be achieved, which is also known as MIMO spatial multiplexing. In order to effectively ensure the transmission performance of uplink data, the terminal device usually performs precoding processing on the uplink multi-stream transmission signal. For a multi-antenna system, the network device can indicate the transmission rank and the corresponding transmitted precoding matrix indicator (TPMI) to the terminal device through downlink control information (DCI) signaling. The TPMI is used to indicate which precoding matrix in the codebook set needs to be used for uplink precoding. Therefore, how to reduce the signaling overhead required for the network device to indicate the rank and TPMI is a problem to be solved in the field. SUMMARY

[0004] The present application provides a communication method and a communication apparatus, which can reduce the bit overhead required for the network device to indicate the transmission rank and the transmitted precoding matrix indicator (TPMI).

[0005] In a first aspect, a communication method is provided. The method can be applied to the terminal side, that is, the method can be executed by a terminal device, or can be executed by a component (such as a chip or a chip system or a circuit or a communication module) of the terminal device, and the present application does not limit this. Hereinafter, the terminal will be mainly taken as an example for description.

[0006] The method can comprise: receiving first indication information, the first indication information indicating a first index value, the first index value indicating a transmission layer number corresponding to uplink data and a plurality of transmission precoding matrix indicator (TPMI) indexes associated with the transmission layer number; and transmitting the uplink data based on the first indication information.

[0007] Optionally, the plurality of TPMI indexes can be used for uplink data transmission in a partial coherent capability, and thus it can also be said that the first index indicates a transmission layer number corresponding to uplink data and a partial coherent precoding matrix associated with the transmission layer number.

[0008] In a possible implementation, the method can comprise: receiving first indication information, the first indication information indicating a first index value, the first index value indicating a transmission layer number corresponding to uplink data and a precoding matrix set constituted by a plurality of transmission precoding matrices associated with the transmission layer number, the precoding matrix set being a partial coherent precoding matrix set.

[0009] Optionally, the network device indicates different transmission layer numbers by using different methods.

[0010] Optionally, the transmission layer number indicated by the first index is 3, and the first index value indicates a transmission layer number corresponding to uplink data and a non-coherent precoding matrix associated with the layer number or a partial coherent precoding matrix associated with the layer number.

[0011] Optionally, the first indication information indicates a transmission layer number and a plurality of TPMI indexes corresponding to the transmission layer number by using a first index, and the terminal device transmits the uplink data by using a precoding matrix corresponding to one index of the plurality of TPMI indexes.

[0012] Based on the above technical solution, the terminal device can determine a plurality of TPMI indexes associated with a transmission layer number by using a first index value included in the first indication information transmitted by the network device, and then transmit uplink data. That is, the first indication information transmitted by the network device can indicate a plurality of TPMI indexes by using a first index value, without additionally increasing candidate values of the first indication information, thereby effectively reducing signaling overhead required for the network device to indicate rank and TPMI, and further facilitating improvement of system spectral efficiency and efficiency of dynamic signaling detection performed by the terminal device.

[0013] With reference to the first aspect, in some implementations of the first aspect, the method further comprises: receiving second indication information, the second indication information indicating a demodulation reference signal (DMRS) port combination corresponding to the uplink data transmission and one TPMI index of the plurality of TPMI indexes; and the transmitting the uplink data based on the first indication information comprises: transmitting the uplink data based on the first indication information and the second indication information.

[0014] With reference to the first aspect, in some implementations of the first aspect, the plurality of TPMI index corresponds to a same DMRS port combination.

[0015] Optionally, when the first index value indicates the number of transmission layers corresponding to the uplink data and the plurality of TPMI indexes associated with the number of transmission layers, the network device can further indicate the specific precoding matrix index through the second indication information.

[0016] As an example, the DMRS port combination corresponding to the uplink data transmission can be indicated by a plurality of antenna port indexes adopted by the uplink data transmission, and the plurality of antenna port indexes can be indicated by the second index value.

[0017] Based on the above technical solutions, part of the TPMI index indication information in the communication system is transferred to other signaling fields other than the first indication information, and the second indication information for indicating the DMRS port combination is combined with the first indication information to indicate the specific TPMI, thereby effectively reducing the signaling overhead required by the network device to indicate the rank and the TPMI, and ensuring a sufficient number of selectable precoding matrices and system performance and precoding accuracy by indicating the specific TPMI.

[0018] With reference to the first aspect, in some implementations of the first aspect, the method further includes: sending capability information, the capability information indicating the number of transmission antenna ports of the uplink data and / or the transmission capability of the terminal device.

[0019] With reference to the first aspect, in some implementations of the first aspect, the number of transmission antenna ports is 3; and / or, the transmission capability of the terminal device is that the transmission mode of the uplink data is partial coherence transmission.

[0020] Optionally, when the number of transmission antenna ports of the terminal device is 3, the precoding codebook in the communication system is pre-defined by a protocol.

[0021] Based on the above technical solutions, the embodiments of the present application are applicable to the case of 3 antenna ports, and a high-efficiency TPMI indication mode in the case of 3 antenna ports is defined. The terminal device in the case of 3 antenna ports has better user experience rate and coverage capability than the terminal device in the case of 2 antenna ports, and the terminal device in the case of 3 antenna ports is more easily commercially implemented than the terminal device in the case of 4 antenna ports.

[0022] With reference to the first aspect, in some implementations of the first aspect, the number of transmission layers corresponding to the uplink data is 3.

[0023] Based on the above technical solution, when the number of uplink data signal transmission streams is large, the number of optional DMRS port combinations supported in the communication system is small, and therefore, many state bits in the DMRS port indication are redundant. At this time, the second indication information can more conveniently indicate a specific TPMI index in the plurality of TPMI indexes by using the redundant state bits, thereby effectively reducing the signaling overhead required by the network device to indicate the rank and TPMI without increasing the DMRS port indication overhead, and ensuring a sufficient number of optional precoding matrices and system performance and precoding accuracy by indicating a specific TPMI.

[0024] In some implementations of the first aspect, the maximum number of transmission layers corresponding to the uplink data is 1, and the first indication information includes 3 bits; or, the maximum number of transmission layers corresponding to the uplink data is 2 or 3, and the first indication information includes 4 bits.

[0025] Optionally, when the maximum number of transmission layers corresponding to the uplink data is 1, the range of the first index value is 0 to 7, and the first indication information can indicate the first index value by 3 bits.

[0026] Optionally, when the maximum number of transmission layers corresponding to the uplink data is 2 or 3, the range of the first index value is 0 to 15, and the first indication information can indicate the first index value by 4 bits.

[0027] In some implementations of the first aspect, the number of transmission layers corresponding to the uplink data is 1, and the TPMI index indicated by the first index value satisfies the following relationship:

[0028] In the above formula, the precoding matrices corresponding to the TPMI indexes 0 to 2 can be referred to as non-coherent precoding matrices, and the precoding matrices corresponding to the TPMI indexes 3 to 6 can be referred to as partially coherent precoding matrices. It should be understood that the naming of the precoding matrices does not limit the protection scope of the embodiments of the present application.

[0029] In some implementations of the first aspect, the number of transmission layers corresponding to the uplink data is 2, and the TPMI index indicated by the first index value satisfies the following relationship:

[0030] In the above formula, the precoding matrices corresponding to the TPMI indexes 0 to 2 can be referred to as non-coherent precoding matrices, and the precoding matrices corresponding to the TPMI indexes 3 to 6 can be referred to as partially coherent precoding matrices.

[0031] In some implementations of the first aspect, the TPMI index indicated by the first index value satisfies the following relationship:

[0032] The precoding matrix corresponding to the TPMI index 0 can be referred to as a non-coherent precoding matrix, and the precoding matrix corresponding to the TPMI index 1 to 2 can be referred to as a partially-coherent precoding matrix.

[0033] In a second aspect, a communication method is provided. The method can be applied to a network side, that is, the method can be executed by a network device, or can be executed by a component (for example, a chip or a chip system or a circuit or a communication module) of the network device, which is not limited in the application. Hereinafter, the terminal is mainly taken as an example for description.

[0034] The method can include: sending first indication information, the first indication information indicating a first index value, the first index value indicating a number of transmission layers corresponding to uplink data and a plurality of transmission precoding matrix indicator (TPMI) indexes associated with the number of transmission layers; and receiving the uplink data determined based on the first indication information.

[0035] With reference to the second aspect, in some implementations of the second aspect, the method further includes: sending second indication information, the second indication information indicating a demodulation reference signal (DMRS) port combination corresponding to the uplink data transmission and one of the plurality of TPMI indexes; and the receiving the uplink data determined based on the first indication information includes: receiving the uplink data determined based on the first indication information and the second indication information.

[0036] With reference to the second aspect, in some implementations of the second aspect, the method further includes: receiving capability information, the capability information indicating a number of transmission antenna ports of the uplink data and / or a transmission capability of a terminal device.

[0037] With reference to the second aspect, in some implementations of the second aspect, the number of transmission antenna ports is 3; and / or the transmission capability of the terminal device is that a transmission mode of the uplink data is partially-coherent transmission.

[0038] With reference to the second aspect, in some implementations of the second aspect, the number of transmission layers corresponding to the uplink data is 3.

[0039] With reference to the second aspect, in some implementations of the second aspect, a maximum value of the number of transmission layers corresponding to the uplink data is 1, and the first indication information includes 3 bits; or a maximum value of the number of transmission layers corresponding to the uplink data is 2 or 3, and the first indication information includes 4 bits.

[0040] With reference to the second aspect, in some implementations of the second aspect, the number of transmission layers corresponding to the uplink data is 1, and the TPMI index indicated by the first index value satisfies the following relationship:

[0041] With reference to the second aspect, in some implementations of the second aspect, the number of transmission layers corresponding to the uplink data is 2, and the TPMI index indicated by the first index value satisfies the following relationship:

[0042] With reference to the second aspect, in some implementations of the second aspect, the TPMI index indicated by the first index value satisfies the following relationship:

[0043] The beneficial effects and possible designs related to the second aspect can be referred to the descriptions of the first aspect, and will not be repeated here.

[0044] In a third aspect, a communication apparatus is provided, which can include: a transceiver, configured to receive first indication information, the first indication information indicating a first index value, the first index value indicating a number of transmission layers corresponding to uplink data and a transmission precoding matrix indicator (TPMI) index associated with the number of transmission layers; and transmit the uplink data based on the first indication information.

[0045] With reference to the third aspect, in some implementations of the third aspect, the transceiver is further configured to receive second indication information, the second indication information indicating a demodulation reference signal (DMRS) port combination corresponding to the uplink data transmission and one of the plurality of TPMI indexes; and transmit the uplink data based on the first indication information and the second indication information.

[0046] With reference to the third aspect, in some implementations of the third aspect, the transceiver is further configured to transmit capability information, the capability information indicating a number of transmit antenna ports of the uplink data and / or a transmission capability of a terminal device.

[0047] With reference to the third aspect, in some implementations of the third aspect, the number of transmit antenna ports is 3; and / or the transmission capability of the terminal device is that a transmission mode of the uplink data is partial coherence transmission.

[0048] With reference to the third aspect, in some implementations of the third aspect, the number of transmission layers corresponding to the uplink data is 3.

[0049] With reference to the third aspect, in some implementations of the third aspect, a maximum value of the number of transmission layers corresponding to the uplink data is 1, and the first indication information includes 3 bits; or a maximum value of the number of transmission layers corresponding to the uplink data is 2 or 3, and the first indication information includes 4 bits.

[0050] In some implementations of the third aspect, the number of transmission layers corresponding to the uplink data is 1, and the TPMI index indicated by the first index value satisfies the following relationship:

[0051] In some implementations of the third aspect, the number of transmission layers corresponding to the uplink data is 2, and the TPMI index indicated by the first index value satisfies the following relationship:

[0052] In some implementations of the third aspect, the TPMI index indicated by the first index value satisfies the following relationship:

[0053] In a fourth aspect, a communication apparatus is provided, which can include: a transceiver configured to send first indication information, the first indication information indicating a first index value, the first index value indicating a number of transmission layers corresponding to uplink data and a transmission precoding matrix indicator (TPMI) index associated with the number of transmission layers; and the transceiver is further configured to receive the uplink data determined based on the first indication information.

[0054] In some implementations of the fourth aspect, the transceiver is further configured to send second indication information, the second indication information indicating a demodulation reference signal (DMRS) port combination corresponding to the uplink data transmission and one of the plurality of TPMI indexes; and the transceiver is further configured to receive the uplink data determined based on the first indication information and the second indication information.

[0055] In some implementations of the fourth aspect, the transceiver is further configured to receive capability information, the capability information indicating a number of transmit antenna ports of the uplink data and / or a transmission capability of a terminal device.

[0056] In some implementations of the fourth aspect, the number of transmit antenna ports is 3; and / or the transmission capability of the terminal device is that a transmission mode of the uplink data is partial coherence transmission.

[0057] In some implementations of the fourth aspect, the number of transmission layers corresponding to the uplink data is 3.

[0058] In some implementations of the fourth aspect, a maximum value of the number of transmission layers corresponding to the uplink data is 1, and the first indication information includes 3 bits; or a maximum value of the number of transmission layers corresponding to the uplink data is 2 or 3, and the first indication information includes 4 bits.

[0059] In a fourth aspect, in some implementations of the fourth aspect, the number of transmission layers corresponding to the uplink data is 1, and the TPMI index indicated by the first index value satisfies the following relationship:

[0060] In a fourth aspect, in some implementations of the fourth aspect, the number of transmission layers corresponding to the uplink data is 2, and the TPMI index indicated by the first index value satisfies the following relationship:

[0061] In a fourth aspect, in some implementations of the fourth aspect, the TPMI index indicated by the first index value satisfies the following relationship:

[0062] In a fifth aspect, a communication apparatus is provided, which is configured to execute the method in the first aspect or the second aspect or any possible implementation of the first aspect or the second aspect. Specifically, the apparatus can include units and / or modules for performing the method in the first aspect or the second aspect or any possible implementation of the first aspect or the second aspect, such as a processing unit and / or a communication unit.

[0063] In an implementation, the apparatus is a communication device (e.g., a terminal device, or a network device). When the apparatus is a communication device, the communication unit can be a transceiver, or an input / output interface; and the processing unit can be at least one processor. Optionally, the transceiver can be a transceiver circuit. Optionally, the input / output interface can be an input / output circuit.

[0064] In another implementation, the apparatus is a chip, a chip system or a circuit or a communication module for a communication device (e.g., a terminal device, or a network device). When the apparatus is a chip, a chip system or a circuit for a communication device, the communication unit can be an input / output interface, an interface circuit, an output circuit, an input circuit, a pin or related circuit on the chip, the chip system or the circuit, etc.; and the processing unit can be at least one processor, a processing circuit or a logic circuit, etc.

[0065] In a sixth aspect, a communication apparatus is provided, which includes at least one processor configured to cause the apparatus to execute the method in the first aspect or the second aspect or any possible implementation of the first aspect or the second aspect.

[0066] Optionally, the at least one processor is configured to execute a computer program or instructions to perform the method in the first aspect or the second aspect or any possible implementation of the first aspect or the second aspect.

[0067] Optionally, the apparatus further includes a memory configured to store the computer program or instructions.

[0068] Optionally, the at least one processor is coupled with a memory for storing the computer program or instructions. The memory can be arranged outside the apparatus.

[0069] Optionally, the apparatus further comprises a communication interface through which the processor reads the instructions on the memory. It can be understood that the communication interface is coupled with the processor and can be used to input the computer program or instructions into the processor or output the information in the processor.

[0070] For the operations of sending, acquiring / receiving and the like involved, if no special description is made, or if it is not contrary to the actual role or inherent logic in the related description, it can be understood as output, input and the like, or as the sending and receiving operations performed by the radio frequency circuit and the antenna, which are not limited in the present application.

[0071] In an implementation manner, the apparatus is a communication device (such as a terminal device, or a network device).

[0072] In another implementation manner, the apparatus is a chip, a chip system or a circuit or a communication module for a communication device (such as a terminal device, or a network device). Optionally, the chip is a Modem chip, also known as a baseband chip, or a system on chip (SoC) chip or a system in package (SIP) chip containing a modem core.

[0073] In a seventh aspect, a computer readable storage medium is provided, and the computer readable medium stores a computer program (for example, program code) or instructions, which, when executed on a communication apparatus, causes the communication apparatus to perform the method in the first aspect or the second aspect or any possible implementation manner thereof.

[0074] In an eighth aspect, a computer program product containing instructions is provided, which, when executed on a computer, causes the computer to perform the method in the first aspect or the second aspect or any possible implementation manner thereof.

[0075] In a ninth aspect, a communication system is provided, which includes a first communication apparatus and a second communication apparatus. The first communication apparatus is configured to perform the method provided in any implementation manner of the first aspect, and the second communication apparatus is configured to perform the method provided in any implementation manner of the second aspect. BRIEF DESCRIPTION OF DRAWINGS

[0076] FIG. 1 is a schematic diagram of a wireless communication system suitable for embodiments of the present application.

[0077] FIG. 2 is a schematic diagram of a communication method 200 provided by embodiments of the present application.

[0078] FIG. 3 is a schematic diagram of a communication apparatus 300 according to an embodiment of the present application.

[0079] FIG. 4 is a schematic diagram of another communication apparatus 400 according to an embodiment of the present application.

[0080] FIG. 5 is a schematic diagram of a chip system 500 according to an embodiment of the present application. DETAILED DESCRIPTION

[0081] The technical solutions in the present application will be described below with reference to the drawings.

[0082] Before introducing the solutions of the present application, the following points are explained.

[0083] (1) In the present application, "indication" can include direct indication, indirect indication, explicit indication, implicit indication, etc. When describing that certain indication information indicates A, it can be understood that the indication information carries A, carries an identifier of A, carries B having a correlation relationship with A, carries an identifier of B having a correlation relationship with A, etc. In other words, if the receiving side of certain indication information can determine A according to the indication information, it can be described that the indication information indicates A, and the specific determination manner is not limited. When it is understood that the indication information carries A, "indication" can be replaced by "includes", and at this time, similar to the expression "sending / receiving indication information, the indication information indicates A", it can be replaced by "sending / receiving A".

[0084] In the present application, the information indicated by the indication information is referred to as to-be-indicated information. In the specific implementation process, there are many ways to indicate the to-be-indicated information, for example but not limited to, the to-be-indicated information can be directly indicated, such as the to-be-indicated information itself or an index of the to-be-indicated information, etc. The to-be-indicated information can also be indirectly indicated by indicating other information, where the other information has a correlation relationship with the to-be-indicated information. The to-be-indicated information can also be only indicated in part, and the other part of the to-be-indicated information is known or agreed in advance. For example, the indication of specific information can also be realized by means of the arrangement order of each information agreed in advance (for example, the protocol stipulates), thereby reducing the indication overhead to a certain extent. In addition, the to-be-indicated information can be sent as a whole, or can be sent separately into multiple sub-information, and the sending period and / or sending occasion of these sub-information can be the same or different.

[0085] (2) In this application, the expression " / " is used to represent the "or" relationship of the objects associated in front and back; for example, A / B can represent: A or B. The expression "and / or" is used to represent the association relationship of and or or; for example, A and / or B can represent the following cases: A exists alone, B exists alone, A and B exist together, wherein A, B can be single or multiple. "At least one of the following" or similar expressions are used to represent any combination of the listed items; for example, at least one of A, B and (or) C can represent the following cases: A exists alone, B exists alone, C exists alone, A and B exist together, B and C exist together, A and C exist together, A, B and C exist together, wherein A, B, C can be single or multiple.

[0086] (3) In this application, "send" and "receive" represent the direction of signal transmission. For example, "sending information to XX" can be understood as the destination of the information being XX, which can include direct transmission through the air interface, or indirect transmission through the air interface by other units or modules. "Receiving information from YY" can be understood as the source of the information being YY, which can include direct reception from YY through the air interface, or indirect reception from YY through the air interface from other units or modules. "Send" can also be understood as the "output" of the chip interface, and "receive" can also be understood as the "input" of the chip interface. In other words, sending and receiving can be between devices, such as between network devices and terminal devices, or within a device, such as between components, modules, chips, software modules or hardware modules within a device through a bus, wire or interface.

[0087] (4) In various embodiments of the present application, the terms and / or descriptions of different embodiments are consistent and can be mutually referenced if there is no special description and logical conflict. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0088] (5) In this application, "first" and "second" are used to distinguish objects and do not limit the scope of the embodiments of the present application. They are not used to describe the order or sequence of the features. It should be understood that the objects thus described can be interchanged under appropriate circumstances in order to describe solutions other than the embodiments of the present application.

[0089] (6) In this application, "predefined" can mean standard protocol predefined, or can also mean pre-agreed or pre-negotiated between devices. Among them, "protocol" can refer to standard protocols in the communication field, which can include fourth generation (4 th generation, 4G) network, fifth generation (5 thThe communication system to which the embodiments of the present application apply is not limited to a specific communication system, and can be a system to which a new radio (NR) protocol, a 5th generation (5G) network protocol, a 5.5G network protocol, a future communication network protocol, and a related protocol applied to a future communication system are applied. The present application is not limited thereto.

[0090] (7) In the present application, the words "as an example", "exemplarily", "such as" and the like are used to mean an example, illustration, or description. Any embodiment or design scheme described as "example" in the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the word "example" is used to present the concept in a specific manner. In the embodiments of the present application, "of", "corresponding" and "corresponding" are sometimes used interchangeably, and it should be pointed out that when their differences are not emphasized, the meanings expressed are consistent.

[0091] First, the communication system to which the present application applies will be introduced.

[0092] The technical solutions provided by the present application can be applied to various communication systems, such as a 5th generation (5G) or new radio (NR) system, a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD) system, etc. The technical solutions provided by the present application can also be applied to future communication systems, such as a future communication network mobile communication system. The technical solutions provided by the present application can also be applied to device to device (D2D) communication, vehicle-to-everything (V2X) communication, machine to machine (M2M) communication, machine type communication (MTC), and internet of things (IoT) communication systems. The technical solutions provided by the present application can also be applied to non-terrestrial network (NTN) systems such as inter-satellite communication and satellite communication.

[0093] As an example, a satellite communication system includes a satellite base station and a terminal device. The satellite base station provides communication services for the terminal device. The satellite base station can also communicate with a base station. The satellite can be a base station or a terminal device. The satellite can refer to a drone, a hot air balloon, a low earth orbit satellite, a medium earth orbit satellite, a high earth orbit satellite, etc. The satellite can also refer to a non-ground base station or a non-ground device, etc.

[0094] As an example, V2X communication can include vehicle-to-vehicle (V2V) communication, vehicle-to-infrastructure (V2I) communication, vehicle-to-pedestrian (V2P) communication, vehicle-to-network (V2N) communication, etc.

[0095] A device in a communication system can send a signal to another device or receive a signal from another device. The signal can include information, signaling, or data, etc. The device can also be replaced by an entity, a network entity, a communication device, a communication module, a node, a communication node, etc. The device is taken as an example for description in embodiments of the present application.

[0096] The terminal device in the embodiments of the present application can be a device or module with corresponding communication functions for accessing the above-mentioned communication system. The terminal device can include various devices with wireless communication functions, which can be used to connect people, things, machines, etc. The terminal device can be widely used in various scenarios, such as cellular communication, D2D, V2X, end-to-end, M2M, MTC, IoT, virtual reality (VR), augmented reality (AR), industrial control, autonomous driving, remote medical treatment, smart power grid, smart furniture, smart office, smart wear, smart traffic, smart city UAV, robot, remote sensing, passive sensing, positioning, navigation and tracking, autonomous delivery, etc. The terminal device can be a terminal in any of the above scenarios, such as an MTC terminal, an IoT terminal, etc. The terminal device can be a user equipment (UE) of the 3rd generation partnership project (3GPP) standard, a terminal, a fixed device, a mobile station device or a mobile device, a subscriber unit, a handset, a vehicle-mounted device, a wearable device, a cellular phone, a smart phone, a session initiation protocol (SIP) phone, a wireless data card, a personal digital assistant (PDA), a computer, a tablet computer, a notebook computer, a wireless modem, a handset, a laptop computer, a computer with wireless transceiver function, a smart book, a vehicle, a satellite, a global positioning system (GPS) device, a target tracking device, an aircraft (such as a drone, a helicopter, a multi-copter, a quad-copter, or an airplane, etc.), a ship, a remote control device, a smart home device, an industrial device, a transport vehicle with wireless communication function, a communication module, a road side unit (RSU) with terminal function, or a device built-in the above-mentioned device (such as a communication module, a modem or a chip in the above-mentioned device, etc.), or other processing devices connected to the wireless modem.

[0097] It should be understood that in some scenarios, the UE can also be used as a base station. For example, the UE can act as a scheduling entity that provides sidelink signals between UEs in V2X, D2D or similar scenarios.

[0098] In the embodiments of the present application, the device for implementing the function of the terminal device, i.e., the terminal device, can be a terminal device or a device capable of supporting the terminal device to implement the function, such as a chip system or a chip or a circuit or a communication module (i.e., a communication module performing a communication function), which can be installed in the terminal device. In the embodiments of the present application, the chip system can be composed of a chip or can include a chip and other discrete devices. In addition, the device can also be configured with program instructions for performing corresponding communication functions.

[0099] The network device in the embodiments of the present application can be a device or a module with a corresponding communication function. The network device can be a device for communicating with the terminal device, and the network device can also be referred to as an access network device or a radio access network device, such as a network device, which can be a base station. The network device in the embodiments of the present application can refer to a radio access network (RAN) node (or device) for accessing the terminal device to a wireless network. The base station can broadly cover various names in the following or be replaced by the following names, such as: Node B (NodeB), evolved Node B (eNB), next generation Node B (gNB), relay station, access point, transmitting and receiving point (TRP), transmission point, primary station, secondary station, motor slide retainer (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. The base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. The base station can also refer to a communication module, a modem or a chip for being arranged in the foregoing device or apparatus. The base station can also be a mobile switching center and a device assuming a base station function in D2D, V2X, M2M communication, a network side device in a future communication network, a device assuming a base station function in a future communication system, etc. The base station can support networks of the same or different access technologies. The embodiments of the present application do not limit the specific technologies and specific device forms adopted by the network device.

[0100] A base station can be fixed, or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, with one or more cells moving according to the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0101] In some deployments, the network device mentioned in embodiments of the present application can be a device including a CU, or a DU, or a device including a CU and a DU, or a control plane CU node (central unit-control plane (CU-CP)) and a user plane CU node (central unit-user plane (CU-UP)), and a DU node.

[0102] In some deployments, a plurality of RAN nodes cooperate to assist a terminal device to implement wireless access, and different RAN nodes respectively implement part of the functions of a base station. For example, a RAN node can be a CU, a DU, a CU-CP, a CU-UP, or a radio unit (RU), etc. The CU and the DU can be separately arranged, or can also be included in the same network element, such as a BBU. The RU can be included in a radio frequency device or a radio frequency unit, such as an RRU, an AAU, or an RRH.

[0103] In different systems, the CU (or CU-CP and CU-UP), DU, or RU can also have different names, but those skilled in the art can understand their meanings. For example, the wireless access network can also be an open radio access network (O-RAN) architecture, in which the CU can also be referred to as an open CU (O-CU), the DU can also be referred to as an open DU (O-DU), the CU-CP can also be referred to as an open CU-CP (O-CU-CP), the CU-UP can also be referred to as an open CU-UP (O-CU-UP), and the RU can also be referred to as an open RU (O-RU). Any of the CU (or CU-CP, CU-UP), DU, and RU in the present application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0104] In the embodiments of the present application, the apparatus for implementing the function of the network device can be a network device, or an apparatus capable of supporting the network device to implement the function, such as a chip system or a chip or a circuit or a communication module (i.e., a communication module performing a communication function), which can be installed in the network device. In the embodiments of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices. In addition, program instructions for performing corresponding communication functions can also be configured in the apparatus. In the embodiments of the present application, only the apparatus for implementing the function of the network device is taken as an example for description, and the scheme of the embodiments of the present application is not limited.

[0105] The network device and the terminal device can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; can also be deployed on water surface; and can also be deployed on aircraft, balloons and satellites in the air. The scenarios in which the network device and the terminal device are located are not limited in the embodiments of the present application.

[0106] In the embodiments of the present application, the signal transmission is mainly taken as a background, which is applicable to the scenarios of homogeneous networks and heterogeneous networks, and there is no limitation on the transmission points, which can be multi-point cooperative transmission between macro base stations and macro base stations, micro base stations and micro base stations, and macro base stations and micro base stations, and are applicable to FDD / TDD systems. The embodiments of the present application are applicable to low-frequency scenarios and also applicable to high-frequency scenarios. The embodiments of the present application are applicable to 4G, 5G or future mobile communication systems. The embodiments of the present application are applicable to Single-TRP or Multi-TRP scenarios, and any derivative scenarios thereof. The embodiments of the present application are applicable to NR downlink transmission and uplink transmission. The time units involved in the embodiments of the present application can be time slots, and can also be time to interactive (TTI) and / or subframes and / or mini-slots. The frequency domain units involved can be resource blocks (RBs), and can also be subcarriers and / or frequency domain subbands. The devices in the embodiments of the present application can be base stations or TRPs, gNBs, customer premise equipment (CPEs), user equipment, relays.

[0107] A communication system applicable to the embodiments of the present application is briefly introduced in combination with FIG. 1, as follows.

[0108] Referring to FIG. 1, as an example, FIG. 1 is a schematic diagram of a wireless communication system applicable to embodiments of the present application. As shown in FIG. 1, the wireless communication system includes a radio access network 100. The radio access network 100 can be a next generation (e.g., future communication network or higher version) radio access network, or a conventional (e.g., 5G, 4G, 3G or 2G) radio access network. One or more terminal devices (120a-120j, collectively referred to as 120) can be connected to each other or connected to one or more network devices (110a, 110b, collectively referred to as 110) in the radio access network 100. Network elements in the wireless communication system are connected through interfaces (e.g., NG, Xn) or air interfaces.

[0109] In the communication between the network device and the terminal device, the network device can manage one or more cells, and each cell can include at least one terminal device. A cell can be understood as an area within the coverage of the wireless signal of the network device.

[0110] FIG. 1 is only a schematic diagram, and the wireless communication system can further include other devices, such as core network devices, wireless relay devices, and / or wireless backhaul devices, etc., which are not shown in FIG. 1.

[0111] For the convenience of understanding the embodiments of the present application, the terms involved in the present application are briefly explained.

[0112] 1. Multiple input and multiple output (MIMO): MIMO is a core technology of LTE and NR systems. By configuring multiple antennas at the sending end and / or receiving end, and through reasonable signal processing (such as precoding, etc.), multiple data streams can be transmitted in parallel, also known as MIMO spatial multiplexing. MIMO spatial multiplexing can effectively improve the system capacity by multiplying the number of data streams.

[0113] 2. Spatial layer: For a MIMO system, multiple parallel data streams can be transmitted in the same time-frequency resource through space division multiplexing, where each data stream can be referred to as a spatial layer. A spatial layer is also referred to as a transmission layer, a data stream, or simply a stream or a layer. For a terminal device, the number of corresponding spatial layers is also referred to as rank. Generally, the number of spatial layers corresponding to a terminal device is not greater than the number of antennas of the terminal device.

[0114] 3、Sounding Reference Signal (SRS): SRS is an uplink (UL) reference signal sent by a terminal device to a network device. After receiving the SRS signal, the network device can obtain the UL channel information from the terminal device to the network device based on the SRS signal. If there is reciprocity characteristic between the uplink and downlink channels (such as in a TDD system), the downlink (DL) channel information from the network device to the terminal device can also be obtained based on the SRS-based uplink channel measurement. After obtaining the UL channel information corresponding to the terminal device, the network device can perform data transmission resource scheduling or precoding processing on the terminal device based on the channel information.

[0115] 4、Codebook-based uplink transmission: For uplink transmission, when a terminal device is configured with multiple antenna transmission radio frequency channels, the terminal device can perform uplink MIMO transmission through multiple antennas. Or multiple terminal devices simultaneously transmit on the same time-frequency resource to form a virtual MIMO system, i.e., uplink multi-user MIMO transmission. The current NR protocol supports both codebook-based transmission and non-codebook (non-codebook) transmission for uplink MIMO transmission modes.

[0116] For codebook-based uplink transmission, SRS-based uplink channel measurement is mainly relied on. Based on the channel measurement results, the network device selects the precoding matrix for uplink transmission from the pre-defined precoding matrix set, i.e., the codebook, and indicates the index corresponding to the precoding matrix for uplink data transmission to the terminal device through control signaling.

[0117] Specifically, the codebook-based uplink transmission procedure includes: (1) the network device configures an SRS resource for the terminal device, and the function of the SRS resource is codebook (also can be called usage). The network device can configure a maximum of two SRS resources, and each SRS resource contains n ports. In an implementation manner, the n ports of each SRS resource correspond to n antenna ports of the terminal device. The terminal device sends an SRS to the network device based on the configured SRS resource. (2) The network device performs uplink channel measurement according to the SRS signal sent by the terminal device, performs resource scheduling for the terminal device, and determines information such as an SRS resource corresponding to uplink transmission, a number of spatial layers of uplink transmission, a corresponding precoding matrix, and a corresponding modulation and coding scheme (MCS). The network device notifies the terminal device of resource allocation of a physical uplink shared channel (PUSCH), a corresponding MCS, a transmit precoding matrix indicator (TPMI), a number of transmission layers, and a corresponding SRS resource indicator. Assuming that the network device configures two SRS resources (SRS resource 0 and SRS resource 1) for the terminal device, the network device performs channel measurement on the SRS resource 0 and the SRS resource 1, finds that the channel quality of the antenna port corresponding to the SRS resource 0 is better, and then indicates a sounding reference signal indication (SRI) = 0 to the terminal device, indicating that the terminal device uses the terminal antenna port corresponding to the SRS resource 0 to perform transmission in subsequent uplink data transmission. At the same time, the network device selects the best rank and precoding matrix in a predefined precoding matrix set based on the channel measurement result, and indicates the rank and precoding matrix index to the terminal device for subsequent data transmission. (3) The terminal device receives the indication information to obtain the rank value and the corresponding precoding matrix index configured by the network device. On the time-frequency resource of the uplink data PUSCH scheduling, the terminal device performs data transmission according to the configured rank value and the corresponding precoding matrix.

[0118] 5. Transmit precoding matrix indicator: In order to effectively ensure the transmission performance of uplink data, the uplink multi-stream transmission signal is usually precoded. Assuming that the data symbol vector sent by the terminal side is x = [x1, x2, …, xNt], and the precoding matrix is W, then the precoded data symbol vector is x = Wx. L ] T wherein x ldenotes the transmitted data symbol corresponding to the l-th spatial layer (l = 1, 2, …, L). Assuming that the precoding matrix is W, the precoded transmitted signal vector can be denoted as:

[0119] wherein, denotes the transmitted symbol corresponding to the j-th transmit antenna port. In actual systems, the precoding matrix adopted by the terminal device in uplink transmission is usually indicated to the terminal device by the network device. Considering the indication overhead and performance of the precoding matrix, for a codebook system, the precoding matrix W is usually selected from a preset precoding matrix set (also referred to as a codebook). Taking the NR protocol as an example, for a single-antenna single-stream transmission system, W = 1. For a multi-antenna system, the network device sends indication information TPMI to the terminal device, which indicates which precoding matrix in the codebook set needs to be used for uplink precoding. Taking a 4-antenna port as an example, the NR protocol defines different codebooks for rank 1 to 4, as shown in Tables 1 to 4, respectively.

[0120] Table 1 Precoding matrix set corresponding to 4-antenna port single-stream transmission

[0121] Table 2 Precoding matrix set corresponding to 4-antenna port 2-stream transmission

[0122] Table 3 Precoding matrix set corresponding to 4-antenna port 3-stream transmission

[0123] Table 4 Precoding matrix set corresponding to 4-antenna port 4-stream transmission

[0124] 6. Antenna coherent transmission capability of terminal device: For different terminal devices, due to factors such as cost and size, they often have different transmission capabilities. The terminal device can report the antenna coherent transmission capability of the terminal device to the network device. Optionally, the terminal device capability includes full coherent capability, partial coherent capability, and non-coherent capability.

[0125] Taking a 4-antenna port (Tx) terminal device as an example, for different rank values, the supported uplink precoding matrices are shown in Tables 1 to 4 as described above. For full-coherent capability, 4 transmit antenna ports can be coherently transmitted, so any precoding matrix in Tables 1 to 4 can be used for transmission. For partial-coherent capability, 4 antenna ports are divided into G = 2 coherent antenna port groups, where antenna port 0 and antenna port 2 for uplink signal transmission correspond to coherent antenna port group 0, and antenna port 1 and antenna port 3 for uplink signal transmission correspond to coherent antenna port group 1. During uplink data transmission, precoding matrices with precoding matrix index 4 to 11 in Table 1, or precoding matrices with precoding matrix index 6 to 13 in Table 2, or precoding matrices with precoding matrix index 1 to 2 in Table 3, or precoding matrices with precoding matrix index 1 to 2 in Table 4 can be used for transmission. For non-coherent capability, during uplink data transmission, precoding matrices with precoding matrix index 0 to 3 in Table 1, or precoding matrices with precoding matrix index 0 to 5 in Table 2, or precoding matrix with precoding matrix index 0 in Table 3, or precoding matrix with precoding matrix index 0 in Table 4 can be used for transmission.

[0126] The network device indicates the number of transmission streams and the corresponding TPMI to the terminal device through downlink control information (DCI) signaling. Specifically, the DCI signaling contains a precoding information and number of layers field, which indicates the corresponding rank value during PUSCH transmission and the corresponding TPMI index value in Tables 1 to 4. For example, for 4 antenna ports, if the transform precoder is not enabled for cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) waveform, uplink full power transmission (ul-full power transmission) is not configured, or is configured as fullpowerMode2 or fullpower, the corresponding TPMI and rank optional combination table is shown in Table 5. The index value indicated by the TPMI is used to indicate the corresponding precoding matrix in Tables 1 to 4. For different terminal device antenna capabilities, the range of TPMI values to be indicated is different.

[0127] Table 5 4-antenna port precoding TPMI and number of streams (transform precoder not enabled, ul-FullPowerTransmission not configured, or configured as fullpowerMode2 or fullpower)

[0128] For example, for a terminal device with partial coherence capability, if the value of the Precoding information and number of layers field in the DCI signaling sent by the network device is 12, it indicates that the network device configures the rank value of the uplink data transmission to be 1, and uses the precoding matrix with index 4 in Table 1 to send uplink data.

[0129] 7. Demodulation reference signal (dedicated demodulation reference signal, DMRS) port indication: the DCI signaling contains an antenna port field, which is used to indicate the DMRS port index.

[0130] For different rank values, the protocol defines different DMRS port index tables. Taking the double symbol Type 1 DMRS as an example, when the transform precoder is not enabled, the DMRS port index table corresponding to 1 layer (i.e. rank = 1) to 4 layers (i.e. rank = 4) is shown in Tables 6 to 9 below. The terminal device can select the corresponding DMRS port index table based on the precoding information and number of layers field and the rank value obtained by itself antenna capability, so as to determine the DMRS port index indicated by the antenna port field.

[0131] Table 6 DMRS port index, dmrs-Type = 1, maximum DMRS symbol number is 2, rank = 1

[0132] Table 7 DMRS port index, dmrs-Type = 1, maximum DMRS symbol number is 2, rank = 2

[0133] Table 8 DMRS port index, dmrs-Type = 1, maximum DMRS symbol number is 2, rank = 3

[0134] Table 9 DMRS port index, dmrs-Type = 1, maximum DMRS symbol number is 2, rank = 4

[0135] The first column (value) in the above Tables 6 to 9 represents the value of the antenna port field, and the third column DMRS port represents the DMRS port index value. The meanings of the second and fourth columns of parameters in the above Tables 6 to 9 can refer to the existing standards or protocols, and will not be described here.

[0136] It can be seen that for a larger rank value, the number of supported optional DMRS port combinations is smaller, and there are more redundant states in the DMRS port indication. For example, for rank = 3, there are only 3 optional DMRS port combinations in Table 8, and the indication overhead is 4 bits, and the indication information values 3-15 are redundant.

[0137] Currently, for 3Tx terminal devices, the uplink codebook with a maximum rank of 3 and the corresponding TPMI indication are not supported. In one possible implementation, for 3Tx terminal devices, the 3Tx partial coherence codebook design can be obtained by extending the design of the 2Tx and 4Tx codebooks. However, the optional precoding matrices included in the partial coherence codebook need 5-bit indication overhead, and there are many redundant state bits, low indication efficiency, and large overhead.

[0138] Therefore, the present application proposes that the number of transmission layers corresponding to the uplink data and the plurality of TPMI indexes associated with the transmission layers can be indicated by indexes in the indication information, so as to reduce the signaling overhead required by the network device to indicate the rank and the TPMI.

[0139] The method provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments provided by the present application can be applied to the scenarios shown in the above figures, without limitation.

[0140] Referring to FIG. 2, FIG. 2 is a schematic diagram of a communication method 200 provided by an embodiment of the present application. For ease of description, the terminal device and the network device are exemplarily described below. The terminal device can be replaced by a component (such as a chip or a chip system or a circuit or a communication module) of the terminal device, and the network device can be replaced by a component (such as a chip or a chip system or a circuit or a communication module) of the network device. In addition, the steps described below executed by a single execution subject can also be divided into being executed by multiple execution subjects, which can be logically and / or physically separated. The method 200 shown in FIG. 2 can include the following steps.

[0141] 210, the terminal device sends the capability information, and correspondingly, the network device receives the capability information, which indicates the number of transmission antenna ports of the uplink data and / or the transmission capability of the terminal device.

[0142] The capability information can also be referred to as UE capability information or terminal device capability information, and the like. The capability information can be reported by the terminal device to the network device, and is used to indicate the number of transmit antenna ports of the uplink data, the transmission capability of the terminal device, and the like.

[0143] As an example, the uplink data can include data transmitted from the terminal device to the network device in the communication system, which can include user-generated data, device status information, measurement reports, or other types of signals required by a communication protocol, and the like. The user-generated data can include text messages, voice calls, video calls, file uploads, and the like.

[0144] As an example, the terminal device sends the capability information to the network device, which indicates that the number of transmit antenna ports of the terminal device can be 1, 2, 3, or 4, and the like.

[0145] Different transmit antenna ports can correspond to different transmission layers, or can be used to transmit different data streams. Generally, the number of data streams corresponding to a terminal device is not greater than the number of transmit antenna ports of the terminal device. For example, when the number of transmit antenna ports of the terminal device is 3, the maximum number of transmission layers that the terminal device can implement is 3.

[0146] As another example, the terminal device sends the capability information to the network device, which indicates that the transmission capability of the terminal device is that the transmission mode of the uplink data can be partial coherent transmission or non-coherent transmission, and the like.

[0147] The transmission capability can include coherent transmission capability, which can include non-coherent transmission and partial coherent transmission. As an example, under the partial coherent transmission capability, the antenna ports of the terminal device can be divided into a plurality of coherent antenna port groups, and the antenna ports in each group can perform coherent transmission, but the antenna ports between different groups do not have coherence. As another example, under the non-coherent transmission capability, the antenna ports of the terminal device do not have coherence.

[0148] As a possible implementation, the number of transmit antenna ports of the terminal device is 3.

[0149] Optionally, when the number of transmit antenna ports of the terminal device is 3, the precoding codebook in the communication system is predefined by a protocol.

[0150] As an example, for a 3Tx terminal, the precoding codebook corresponding to the transmission layer number of the uplink data taking values of 1, 2, and 3 is predefined, wherein the precoding codebook includes a plurality of selectable precoding matrices, and the precoding codebook corresponding to different values of the transmission layer number is different.

[0151] It should be understood that the above transmission layer number can also be referred to as a spatial layer number, a data stream number, a stream number, a layer number, a rank, or rank, and embodiments of the present application do not limit the same.

[0152] The following will specifically illustrate the precoding matrix set corresponding to the transmission layer number at different values through Example 1 to Example 3, and Table 10 to Table 12.

[0153] Example 1, the transmission layer number is 1.

[0154] Specifically, the precoding matrix set corresponding to the transmission layer number of 1 under 3 antenna ports is shown in Table 10.

[0155] Table 10

[0156] Among them, the precoding matrix corresponding to the TPMI index of 0 to 2 can be referred to as a non-coherent precoding matrix, and the precoding matrix corresponding to the TPMI index of 3 to 6 can be referred to as a partially coherent precoding matrix. It should be understood that the naming of the precoding matrix does not limit the protection scope of the embodiments of the present application.

[0157] Example 2, the transmission layer number is 2.

[0158] Specifically, the precoding matrix set corresponding to the transmission layer number of 2 under 3 antenna ports is shown in Table 11.

[0159] Table 11

[0160] Among them, the precoding matrix corresponding to the TPMI index of 0 to 2 can be referred to as a non-coherent precoding matrix, and the precoding matrix corresponding to the TPMI index of 3 to 6 can be referred to as a partially coherent precoding matrix.

[0161] Example 3, the transmission layer number is 3.

[0162] Specifically, the precoding matrix set corresponding to the transmission layer number of 3 under 3 antenna ports is shown in Table 12.

[0163] Table 12

[0164] Among them, the precoding matrix corresponding to the TPMI index of 0 can be referred to as a non-coherent precoding matrix, and the precoding matrix corresponding to the TPMI index of 1 to 2 can be referred to as a partially coherent precoding matrix.

[0165] As a possible implementation manner, the above capability information indicates that the transmission capability of the terminal device is that the transmission mode of the above uplink data is non-coherent transmission.

[0166] Optionally, the network device indicates the precoding matrix corresponding to the index of 0 to 2 in Table 10 to the terminal device.

[0167] Optionally, the network device indicates to the terminal device a precoding matrix corresponding to index 0 to 2 in Table 11.

[0168] Optionally, the network device indicates to the terminal device a precoding matrix corresponding to index 0 in Table 12.

[0169] As another possible implementation, the capability information indicates that the transmission capability of the terminal device is that the transmission mode of the uplink data is partial coherence transmission.

[0170] Optionally, the network device indicates to the terminal device all precoding matrices in Table 10 to Table 12.

[0171] In the embodiments of the present application, for the case of 3 antenna ports, a way of efficiently indicating TPMI in the case of 3 antenna ports is defined, and the terminal device in the case of 3 antenna ports has better user experience rate and coverage capability than the terminal device in the case of 2 antenna ports, and the terminal device in the case of 3 antenna ports is easier to be commercially implemented than the terminal device in the case of 4 antenna ports.

[0172] 220, the network device sends first indication information, and correspondingly, the terminal device receives the first indication information, the first indication information indicating a first index value, the first index value indicating a transmission layer number corresponding to the uplink data and a TPMI index associated with the transmission layer number.

[0173] Optionally, the first indication information is transmitted through DCI signaling.

[0174] As an example, the first indication information can indicate different first index values through different values of a plurality of bits, for example, the first indication information indicates that the first index value is 6 through 0110.

[0175] As an example, the first index value indicates a transmission layer number corresponding to the uplink data, which can be 1, 2 or 3.

[0176] In one possible case, the transmission layer number corresponding to the uplink data is 1, and the TPMI index indicated by the first index value satisfies the correspondence in Table 10 described above.

[0177] In another possible case, the transmission layer number corresponding to the uplink data is 2, and the TPMI index indicated by the first index value satisfies the correspondence in Table 11 described above.

[0178] In another possible case, the transmission layer number corresponding to the uplink data is 3, and the TPMI index indicated by the first index value satisfies the correspondence in Table 12 described above.

[0179] Optionally, the network device sends configuration information, and correspondingly, the terminal device receives the configuration information, the configuration information indicating a maximum number of transmission layers of the uplink data.

[0180] It should be understood that the maximum number of transmission layers of the uplink data can be understood as a maximum value of the number of transmission layers corresponding to the uplink data, which can be preconfigured, or protocol predefined, or determined in other manners, and embodiments of the present application do not limit this.

[0181] As an example, the number of transmission layers corresponding to the uplink data indicated by the first index value is less than or equal to the maximum number of transmission layers of the uplink data.

[0182] The specific content of the first indication information under different maximum numbers of transmission layers is described below through case 1 and case 2.

[0183] In case 1, the maximum value of the number of transmission layers corresponding to the uplink data is 1, and the first indication information includes 3 bits.

[0184] Specifically, when the maximum value of the number of transmission layers corresponding to the uplink data is 1, the first indication information can indicate the first index value through 3 bits, and the first index value indicates the index of the precoding matrix in table 10 used for uplink data transmission.

[0185] As an example, the first indication information indicates the first index value corresponding to a row in table 13, the range of the first index value in table 13 is 0 to 7, and the first indication information can indicate the first index value through 3 bits.

[0186] Table 13: The number of transmission layers and TPMI indicated by the first index value when the maximum number of streams is 1

[0187] As an example, when the capability information sent by the terminal device indicates that the transmission capability of the terminal device is that the transmission mode of the uplink data is partial coherence transmission, the first indication information sent by the network device can indicate that the first index value in table 13 is 4, and then the terminal device can use the precoding matrix with the TPMI index of 4 in table 10 for transmission when transmitting the uplink data.

[0188] In case 2, the maximum value of the number of transmission layers corresponding to the uplink data is 2 or 3, and the first indication information includes 4 bits.

[0189] Specifically, when the maximum value of the number of transmission layers corresponding to the uplink data is 2 or 3, the first indication information can indicate the first index value through 4 bits, and the first index value indicates the index of the precoding matrix in tables 10 to 12 used for uplink data transmission.

[0190] As an example, the first indication information indicates a first index value corresponding to a row in Table 14, the first index value in Table 14 ranges from 0 to 15, and the first indication information can indicate the first index value by 4 bits.

[0191] Table 14: Number of transmission layers and TPMI indicated by the first index value when the maximum number of streams is 2 or 3

[0192] It should be understood that the mapping relationship in Table 13 and Table 14 can be pre-defined by a protocol or agreed upon by other means. Table 13 and Table 14 are only one possible implementation, and other implementation manners can also be used to make the first index value, the number of transmission layers, and the TPMI satisfy part or all of the mapping relationship in Table 13 and Table 14, and the embodiments of the present application do not limit this.

[0193] In a possible implementation manner, the network device indicates different numbers of transmission layers by different methods.

[0194] As a possible case, the number of transmission layers indicated by the first index value is 1 or 2.

[0195] In a possible implementation manner, the network device sends first indication information, and the terminal device receives the first indication information, the first indication information indicates a first index value, the first index value indicates a number of transmission layers corresponding to uplink data and a TPMI index associated with the number of transmission layers.

[0196] As an example, when the capability information sent by the terminal device indicates that the transmission capability of the terminal device is that the transmission mode of the uplink data is partial-coherent transmission, the first indication information sent by the network device can indicate that the first index value in Table 14 is 12, and then the terminal device can use the precoding matrix with the TPMI index of 4 in Table 11 to send the uplink data.

[0197] As another possible case, the number of transmission layers indicated by the first index value is 3.

[0198] In a possible implementation manner, the network device sends first indication information, and the terminal device receives the first indication information, the first indication information indicates a first index value, the first index value indicates a number of transmission layers corresponding to uplink data and a TPMI index associated with the number of transmission layers.

[0199] As an example, when the capability information sent by the terminal device indicates that the transmission capability of the terminal device is that the transmission mode of the uplink data is non-coherent transmission, the first indication information sent by the network device can indicate that the first index value in Table 14 is 6, and then the terminal device can use the precoding matrix with the TPMI index of 0 in Table 12 to send the uplink data.

[0200] It should be understood that the precoding matrix with TPMI index 0 in Table 12 indicated by the first index value 6 in Table 14 can be used for uplink data transmission in non-coherent capability, and therefore it can also be said that the first index indicates a non-coherent precoding matrix associated with the number of transmission layers.

[0201] Further, in another possible implementation, the first index value indicates the number of transmission layers corresponding to the uplink data and a plurality of TPMI indexes associated with the number of transmission layers.

[0202] In a possible implementation, the first index value indicates the number of transmission layers corresponding to the uplink data and a precoding matrix set composed of a plurality of transmission precoding matrices associated with the number of transmission layers, and the precoding matrix set can be a partial-coherent precoding matrix set.

[0203] Specifically, the partial-coherent precoding matrix set can include the precoding matrices corresponding to index 1 and index 2 in Table 12.

[0204] As an example, when the capability information sent by the terminal device indicates that the transmission capability of the terminal device is that the transmission mode of the uplink data is partial-coherent transmission, the first indication information sent by the network device can indicate that the first index value in Table 14 is 15, and then the terminal device can use the precoding matrix with TPMI index 1 or 2 in Table 12 to transmit the uplink data when the number of transmission layers is 3.

[0205] It should be understood that the first index value 15 in Table 14 can indicate a plurality of specific TPMI indexes (TPMI indexes {1, 2} in Table 12), or can indicate partial-coherent, indicating a precoding matrix in the partial-coherent precoding matrix set.

[0206] In the embodiments of the present application, the terminal device can determine a plurality of TPMI indexes associated with the number of transmission layers through the first index value included in the first indication information sent by the network device, and then transmit the uplink data. That is, the first indication information sent by the network device can indicate a plurality of TPMI indexes through the first index value, without additionally increasing the candidate values of the first indication information, thereby effectively reducing the signaling overhead required for the network device to indicate rank and TPMI, and further facilitating the improvement of system spectral efficiency and the efficiency of dynamic signaling detection of the terminal device.

[0207] Further, taking Table 14 as an example, if the first index value indicates a certain matrix of the total 17 precoding matrices in Tables 10 to 12 for the transmission of uplink data, the network device needs 5 bits of indication signaling overhead. By having the first index value indicate multiple TPMI indexes, the information content that needs to be indicated for rank = 3 is reduced to 2, the range of the first index value indicated by the first indication information in Table 14 is 0 to 15, and the indication signaling overhead required by the network device is reduced to 4 bits.

[0208] It needs to be understood that the precoding matrix with TPMI index 1 or 2 in Table 12 indicated by the first index value 15 in Table 14 can be used for uplink data transmission under partial coherence capability, and therefore it can also be said that the first index indicates a partial coherence precoding matrix associated with the number of transmission layers.

[0209] It also needs to be understood that according to the foregoing description, if the number of transmission layers indicated by the first index is 3, it can also be said that the first index value indicates the number of transmission layers corresponding to the uplink data and the non-coherent precoding matrix associated with the number of transmission layers, or the partial coherence precoding matrix associated with the number of transmission layers.

[0210] It also needs to be understood that in the context of the terminal device having partial coherence capability and the first index value indicating the number of transmission layers as 3 in the embodiments of the present application, the first index value indicates the number of transmission layers corresponding to the uplink data and multiple TPMI indexes associated with the number of transmission layers as an example, and in other contexts, the first indication information can also indicate multiple TPMI indexes through the first index value, thereby reducing the signaling overhead required by the network device to indicate the rank and TPMI, which is not limited in the embodiments of the present application.

[0211] 240, the terminal device sends uplink data based on the first indication information, and correspondingly, the network device receives the uplink data determined based on the first indication information.

[0212] Optionally, the first indication information indicates the number of transmission layers and a corresponding TPMI index through the first index, and the terminal device transmits using the precoding matrix corresponding to the TPMI index during uplink data transmission.

[0213] Optionally, the first indication information indicates the number of transmission layers and multiple TPMI indexes through the first index, and the terminal device transmits using the precoding matrix corresponding to one index of the multiple TPMI indexes during uplink data transmission.

[0214] Optionally, the above communication method 200 further includes step 230, the network device sends second indication information, and correspondingly, the terminal device receives the second indication information, the second indication information indicates the DMRS port combination corresponding to the uplink data transmission and one TPMI index of the multiple TPMI indexes.

[0215] Optionally, the second indication information is transmitted through DCI signaling.

[0216] Optionally, the plurality of TPMI indexes correspond to the same DMRS port combination.

[0217] As a possible implementation, the number of transmission layers corresponding to the uplink data is 3.

[0218] In the embodiment of the present application, the number of transmission layers corresponding to the uplink data is 3, which is a large value, and reference is made to Table 8 or Table 9. At this time, the number of optional DMRS port combinations supported in the communication system is small, and therefore, the state bits in the DMRS port indication are redundant. At this time, the second indication information can more conveniently indicate a specific TPMI index in the plurality of TPMI indexes by using the redundant state bits, thereby effectively reducing the signaling overhead required by the network device to indicate the rank and the TPMI without increasing the DMRS port indication overhead, and ensuring a sufficient number of optional precoding matrices and system performance and precoding accuracy by indicating a specific TPMI.

[0219] As an example, for example, the row corresponding to the first index value 15 in Table 14 described above, when the first index value indicates the number of transmission layers corresponding to the uplink data and the plurality of TPMI indexes associated with the number of transmission layers, the network device can further indicate a specific precoding matrix index through the second indication information.

[0220] Optionally, the one TPMI index in the plurality of TPMI indexes indicated by the second indication information corresponds to one of the TPMI indexes 1 or 2 in Table 12, or is referred to as a partial coherence precoding matrix.

[0221] In a possible implementation, the transmitting the uplink data based on the first indication information includes: transmitting the uplink data based on the first indication information and the second indication information.

[0222] Optionally, the second indication information indicates a second index value, and the second index value indicates a specific index value in the plurality of TPMI indexes indicated by the first index value.

[0223] As an example, the first index value indicates the TPMI index 1 or 2 in Table 12, and the second index value indicates the TPMI index 1 in Table 12.

[0224] As an example, the DMRS port combination corresponding to the uplink data transmission can be indicated by a plurality of antenna port indexes used for the uplink data transmission, and the plurality of antenna port indexes can be indicated by the second index value.

[0225] As a possible case, the communication system adopts single-symbol Type 1 DMRS.

[0226] Specifically, the DMRS port maximum length (maxlength) = 1, the second indication information can indicate the second index value in Table 15, and each row in Table 15 contains 3 DMRS ports.

[0227] Table 15

[0228] As an example, please refer to Table 14 and Table 15. The network device sends the first indication information, which indicates that the first index value is 15, which indicates that the number of uplink data transmission layers is 3, and the TPMI index of uplink data transmission is 1 or 2 in Table 12, or the first index value indicates that the precoding matrix of uplink data transmission is a partially coherent precoding matrix. The network device sends the second indication information, which indicates that the second index value is 0, which further indicates that the precoding matrix used in the uplink data transmission is the precoding matrix corresponding to the TPMI index 1 in Table 12. In addition, the second index value can also indicate that the DMRS port index used in the uplink data transmission is 0-2.

[0229] As another example, please refer to Table 14 and Table 15. The network device sends the first indication information, which indicates that the first index value is 15, which indicates that the number of uplink data transmission layers is 3, and the TPMI index of uplink data transmission is 1 or 2 in Table 12, or the first index value indicates that the precoding matrix of uplink data transmission is a partially coherent precoding matrix. The network device sends the second indication information, which indicates that the second index value is 1, which further indicates that the precoding matrix used in the uplink data transmission is the precoding matrix corresponding to the TPMI index 2 in Table 12. In addition, the second index value can also indicate that the DMRS port index used in the uplink data transmission is 0-2.

[0230] As another possible case, the communication system adopts double-symbol Type 1 DMRS.

[0231] Specifically, the DMRS port maximum length (maxlength) = 2, the second indication information can indicate the second index value in Table 16, and each row in Table 16 contains 3 DMRS ports.

[0232] Table 16

[0233] As an example, refer to Table 14 and Table 16. The network device sends first indication information, the first indication information indicates that the first index value is 15, the first index value indicates that the number of uplink data transmission layers is 3, and the TPMI index of the uplink data transmission is 1 or 2 in Table 12, or the first index value indicates that the precoding matrix of the uplink data transmission is a partially coherent precoding matrix. The network device sends second indication information, the second indication information indicates that the second index value is 1, and the second index value further indicates that the precoding matrix used in the uplink data transmission is the precoding matrix corresponding to the TPMI index 1 in Table 12. In addition, the second index value can also indicate that the DMRS port index used in the uplink data transmission is 0, 1, and 4.

[0234] As another example, refer to Table 14 and Table 16. The network device sends first indication information, the first indication information indicates that the first index value is 15, the first index value indicates that the number of uplink data transmission layers is 3, and the TPMI index of the uplink data transmission is 1 or 2 in Table 12, or the first index value indicates that the precoding matrix of the uplink data transmission is a partially coherent precoding matrix. The network device sends second indication information, the second indication information indicates that the second index value is 4, and the second index value further indicates that the precoding matrix used in the uplink data transmission is the precoding matrix corresponding to the TPMI index 2 in Table 12. In addition, the second index value can also indicate that the DMRS port index used in the uplink data transmission is 0, 1, and 4.

[0235] In the embodiments of the present application, part of the TPMI index indication information is transferred to other signaling fields other than the first indication information to be carried, and the second indication information for indicating the DMRS port combination is combined with the first indication information to indicate the specific TPMI, thereby effectively reducing the signaling overhead required by the network device to indicate the rank and the TPMI, and ensuring a sufficient number of selectable precoding matrices and system performance and precoding accuracy by indicating the specific TPMI.

[0236] The above describes the method provided by the embodiments of the present application in detail with reference to FIG. 2. The following describes the apparatus provided by the embodiments of the present application in detail with reference to FIG. 3 to FIG. 5. It should be understood that the description of the apparatus embodiments corresponds to the description of the method embodiments, and therefore, the content not described in detail can be referred to the method embodiments described above, which will not be described here for brevity.

[0237] Referring to FIG. 3, as an example, FIG. 3 is a schematic diagram of a communication apparatus 300 provided by the embodiments of the present application. The communication apparatus 300 includes a transceiver unit 310 and a processing unit 320. The transceiver unit 310 can be used to implement the corresponding communication function. The transceiver unit 310 can also be referred to as a communication interface or a communication unit. The processing unit 320 can be used for processing, such as determining information bits.

[0238] Optionally, the apparatus 300 can further include a storage unit, which can be used to store instructions and / or data. The processing unit 320 can read the instructions and / or data in the storage unit to enable the apparatus to implement the foregoing method embodiments.

[0239] In a first possible design, the apparatus 300 can be a terminal in the foregoing embodiments, and the apparatus 300 can implement the steps or procedures corresponding to the steps or procedures performed by the terminal in the foregoing method embodiments. In this case, the transceiver 310 can be configured to perform the operations related to the transmission and reception (e.g., operations of transmitting and / or receiving data or messages) of the terminal in the foregoing method embodiments, and the processing unit 320 can be configured to perform the operations related to the processing (or operations other than the transmission and reception, e.g., operations other than the operations of transmitting and / or receiving data or messages) of the terminal in the foregoing method embodiments.

[0240] In a possible implementation, the transceiver 310 can be configured to receive first indication information, where the first indication information indicates a first index value, and the first index value indicates a number of transmission layers corresponding to uplink data and a plurality of transmission pre-coding matrix indicator (TPMI) indexes associated with the number of transmission layers. The transceiver 310 can also be configured to transmit the uplink data based on the first indication information.

[0241] In another possible implementation, the transceiver 310 can be configured to receive second indication information, where the second indication information indicates a demodulation reference signal (DMRS) port combination corresponding to uplink data transmission and one of the plurality of TPMI indexes. The transceiver 310 can also be configured to transmit the uplink data based on the first indication information and the second indication information.

[0242] In a second possible design, the apparatus 300 can be a network device in the foregoing embodiments, and the apparatus 300 can implement the steps or procedures corresponding to the steps or procedures performed by the network device in the foregoing method embodiments. In this case, the transceiver 310 can be configured to perform the operations related to the transmission and reception (e.g., operations of transmitting and / or receiving data or messages) of the network device in the foregoing method embodiments, and the processing unit 320 can be configured to perform the operations related to the processing (or operations other than the transmission and reception, e.g., operations other than the operations of transmitting and / or receiving data or messages) of the network device in the foregoing method embodiments.

[0243] In a possible implementation, the transceiver 310 can be configured to transmit first indication information, where the first indication information indicates a first index value, and the first index value indicates a number of transmission layers corresponding to uplink data and a plurality of transmission pre-coding matrix indicator (TPMI) indexes associated with the number of transmission layers. The transceiver 310 can also be configured to receive the uplink data determined based on the first indication information.

[0244] In another possible implementation, the transceiver 310 is configured to send second indication information, the second indication information indicating one of a DMRS port combination and a TPMI index corresponding to the uplink data transmission; and the transceiver 310 is further configured to receive the uplink data determined based on the first indication information and the second indication information.

[0245] It should be understood that the specific process of each unit performing the corresponding steps described above has been described in detail in the method embodiments described above, and for the sake of brevity, will not be repeated here.

[0246] It should also be understood that the apparatus 300 herein is embodied in the form of functional units. The term "unit" herein can refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a dedicated processor, or a group processor, etc.) and a memory for executing one or more software or firmware programs, a combination of logical circuits, and / or other suitable components that support the described functions. In an optional example, those skilled in the art can understand that the apparatus 300 can be embodied as the communication device in the above embodiments, and can be used to perform the processes and / or steps corresponding to the communication device in each of the method embodiments described above. To avoid repetition, they will not be repeated here.

[0247] The apparatus 300 of each of the above schemes has the function of implementing the corresponding steps performed by the communication device (such as a terminal, and such as a network device) in the above methods. The function can be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions; for example, the transceiver can be replaced by a transceiver (for example, the transmitting unit in the transceiver can be replaced by a transmitter, and the receiving unit in the transceiver can be replaced by a receiver), and other units, such as the processing unit, can be replaced by a processor, which respectively performs the transceiving operations and related processing operations in each of the method embodiments.

[0248] In addition, the transceiver 310 described above can also be a transceiver circuit (for example, it can include a receiving circuit and a transmitting circuit), and the processing unit can be a processing circuit.

[0249] It should be noted that the apparatus in FIG. 3 can be a communication device (such as a terminal, and such as a network device) in the above embodiments, or a chip or a chip system, for example, a system on chip (SoC). Among them, the transceiver can be an input / output circuit, a communication interface; the processing unit is a processor or microprocessor or integrated circuit integrated on the chip. It is not limited here.

[0250] Referring to FIG. 4, as an example, FIG. 4 is a schematic diagram of another communication apparatus 400 provided in embodiments of the present application. The apparatus 400 includes a processor 410 coupled with a memory 420, the memory 420 being configured to store computer programs or instructions and / or data, and the processor 410 being configured to execute the computer programs or instructions stored in the memory 420, or read the data stored in the memory 420, to perform the methods in the above method embodiments.

[0251] Optionally, the processor 410 is one or more.

[0252] Optionally, the memory 420 is one or more.

[0253] Optionally, the memory 420 is integrated with the processor 410, or is separately arranged.

[0254] Optionally, as shown in FIG. 4, the apparatus 400 further includes a transceiver 430 configured to receive and / or send signals. For example, the processor 410 is configured to control the transceiver 430 to receive and / or send signals.

[0255] As an example, the processor 410 can have the functions of the processing unit 320 shown in FIG. 3, the memory 420 can have the functions of a storage unit, and the transceiver 430 can have the functions of the transceiving unit 310 shown in FIG. 3.

[0256] As an example, the apparatus 400 is configured to implement the operations performed by a communication apparatus (such as a terminal, or a network device) in the above method embodiments.

[0257] For example, the processor 410 is configured to execute the computer programs or instructions stored in the memory 420, to implement the related operations of the communication apparatus in the above method embodiments.

[0258] It should be understood that the processor mentioned in embodiments of the present application can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gates or transistor logic components, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0259] It should also be understood that the memory referred to in the embodiments of the application can be a volatile memory and / or a non-volatile memory. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically EPROM (EEPROM) or a flash memory. The volatile memory can be a random access memory (RAM). For example, the RAM can be used as an external cache. As an example but not limitation, the RAM includes the following various forms: static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM) and direct memory bus random access memory (direct rambus RAM, DR RAM).

[0260] It should be noted that when the processor is a general processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) can be integrated in the processor.

[0261] It should also be noted that the memory described herein is intended to include, but not limited to, these and any other suitable types of memory.

[0262] Referring to FIG. 5, as an example, FIG. 5 is a schematic diagram of a chip system 500 provided by an embodiment of the application. The chip system 500 (or also can be called a processing system) includes a logic circuit 510 and an input / output interface 520.

[0263] The logic circuit 510 can be a processing circuit in the chip system 500. The logic circuit 510 can be coupled with a storage unit, and invoke instructions in the storage unit, so that the chip system 500 can implement the methods and functions of the embodiments of the present application. The input / output interface 520 can be an input / output circuit in the chip system 500, and output information processed by the chip system 500, or input data or signaling information to be processed by the chip system 500.

[0264] As an option, the chip system 500 is configured to implement operations performed by a communication device (e.g., a terminal, or a network device) in the above method embodiments.

[0265] For example, the logic circuit 510 is configured to implement processing-related operations performed by a communication device (e.g., a terminal, or a network device) in the above method embodiments; and the input / output interface 520 is configured to implement sending and / or receiving-related operations performed by a communication device (e.g., a terminal, or a network device) in the above method embodiments.

[0266] The embodiments of the present application also provide a computer readable storage medium, which stores a computer program or instructions for implementing the method performed by a communication device (e.g., a terminal, or a network device) in the above method embodiments. For example, the computer program or instructions, when running on a communication device, enable the communication device (e.g., a terminal, or a network device) to perform the above method (e.g., the method 200).

[0267] The embodiments of the present application also provide a computer program product, which contains instructions executed by a computer to implement the method performed by a communication device (e.g., a terminal, or a network device) in the above method embodiments. For example, the computer program or instructions, when running on a communication device, enable the communication device (e.g., a terminal, or a network device) to perform the above method (e.g., the method 200).

[0268] The embodiments of the present application also provide a communication system, which includes the terminal and / or the network device in the above embodiments. For example, the system includes the terminal and the network device in the embodiment of FIG. 2.

[0269] The above-described explanations and advantages of the related contents in any of the above devices can refer to the corresponding method embodiments provided above, and will not be repeated here.

[0270] In several embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented by other manners. For example, the apparatus embodiments described above are only illustrative, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units or components shown or discussed can be indirect coupling or communication connection through some interfaces, apparatuses or units, and can be electrical, mechanical or other forms.

[0271] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable devices. For example, the computer can be a personal computer, a server or a network device. The computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode. The computer readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media. The available media can be magnetic media (such as floppy disk, hard disk, magnetic tape), optical media (such as DVD), or semiconductor media (such as solid state disk (SSD) and the like. For example, the foregoing available media includes but is not limited to: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and various media that can store program codes.

[0272] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A communication method, characterized in that, include: Receive first indication information, the first indication information indicating a first index value, the first index value indicating the transport layer number corresponding to the uplink data and a plurality of transmit precoding matrices associated with the transport layer number indicating TPMI index; The uplink data is sent based on the first indication information.

2. The method according to claim 1, characterized in that, Also includes: Receive second indication information, which indicates the demodulation reference signal DMRS port combination corresponding to the uplink data transmission and one of the plurality of TPMI indices; Sending the uplink data based on the first indication information includes: The uplink data is sent based on the first indication information and the second indication information.

3. The method according to claim 1 or 2, characterized in that, Also includes: Transmit capability information, which indicates the number of transmit antenna ports for the uplink data and / or the transmission capability of the terminal device.

4. The method according to claim 3, characterized in that, The number of transmitting antenna ports is 3; and / or, The transmission capability of the terminal device is as follows: the uplink data is transmitted in a partially coherent manner.

5. The method according to any one of claims 1 to 4, characterized in that, The uplink data corresponds to a transmission layer of 3.

6. The method according to any one of claims 1 to 4, characterized in that, The maximum value of the transport layer number corresponding to the uplink data is 1, and the first indication information includes 3 bits; or, The maximum value of the transmission layer number corresponding to the uplink data is 2 or 3, and the first indication information includes 4 bits.

7. The method according to any one of claims 1 to 4, characterized in that, The uplink data corresponds to a transport layer number of 1, and the TPMI index indicated by the first index value satisfies the following relationship:

8. The method according to any one of claims 1 to 4, characterized in that, The uplink data corresponds to a transport layer number of 2, and the TPMI index indicated by the first index value satisfies the following relationship:

9. The method according to claim 5, characterized in that, The TPMI index indicated by the first index value satisfies the following relationship:

10. A communication method, characterized in that, include: Send first indication information, the first indication information indicating a first index value, the first index value indicating the transport layer number corresponding to the uplink data and a plurality of transmit precoding matrices associated with the transport layer number indicating TPMI index; Receive the uplink data determined based on the first indication information.

11. The method according to claim 10, characterized in that, Also includes: Send a second indication message, which indicates the demodulation reference signal DMRS port combination corresponding to the uplink data transmission and one of the multiple TPMI indices; Receiving the uplink data determined based on the first indication information includes: Receive the uplink data determined based on the first indication information and the second indication information.

12. The method according to claim 10 or 11, characterized in that, Also includes: The capability information indicates the number of transmit antenna ports for the uplink data and / or the transmission capability of the terminal device.

13. The method according to claim 12, characterized in that, The number of transmitting antenna ports is 3; and / or, The transmission capability of the terminal device is as follows: the uplink data is transmitted in a partially coherent manner.

14. The method according to any one of claims 10 to 13, characterized in that, The uplink data corresponds to a transmission layer of 3.

15. The method according to any one of claims 10 to 13, characterized in that, The maximum value of the transport layer number corresponding to the uplink data is 1, and the first indication information includes 3 bits; or, The maximum value of the transmission layer number corresponding to the uplink data is 2 or 3, and the first indication information includes 4 bits.

16. The method according to any one of claims 10 to 13, characterized in that, The uplink data corresponds to a transport layer number of 1, and the TPMI index indicated by the first index value satisfies the following relationship:

17. The method according to any one of claims 10 to 13, characterized in that, The uplink data corresponds to a transport layer number of 2, and the TPMI index indicated by the first index value satisfies the following relationship:

18. The method according to claim 14, characterized in that, The TPMI index indicated by the first index value satisfies the following relationship:

19. A communication device, characterized in that, It includes modules or units for performing the method according to any one of claims 1 to 9; or, it includes modules or units for performing the method according to any one of claims 10 to 18.

20. A communication device, characterized in that, The device includes a processor configured to cause the communication device to perform the method of any one of claims 1 to 9, or configured to cause the communication device to perform the method of any one of claims 10 to 18.

21. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program or instructions that, when executed on a communication device, cause the communication device to perform the method as described in any one of claims 1 to 9, or cause the communication device to perform the method as described in any one of claims 10 to 18.

22. A computer program product, characterized in that, The computer program product includes a computer program or instructions that, when executed on a communication device, cause the communication device to perform the method as described in any one of claims 1 to 9, or cause the communication device to perform the method as described in any one of claims 10 to 18.

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