Communication method and apparatus

Abstract

The present application relates to the field of communications, and discloses a communication method and apparatus. The method comprises: a terminal receives first information indicating sending of an uplink signal on the basis of a downlink reference signal and second information indicating a resource configuration parameter during uplink transmission, wherein the first information and the second information come from a network device; and the terminal sends the uplink signal to the network device on the basis of the second information and uplink precoding, wherein the uplink precoding is determined on the basis of the downlink reference signal, and the uplink signal comprises an uplink data signal and / or an uplink demodulation reference signal. The overhead of uplink information transmission is reduced.

Description

Communication method and device Technical Field

[0001] The present application relates to the field of communications, and in particular to communication methods and devices. Background Art

[0002] In the 3rd Generation Partnership Project (3GPP) New Radio (NR) system, there are two uplink information transmission modes: codebook-based (CB) and noncodebook-based (NCB). CB can be used in frequency division duplex (FDD) or time division duplex (TDD) scenarios, while NCB is primarily used in TDD scenarios.

[0003] In the new generation mobile communication system, with the significant increase in the number of terminals and the number of spatial division multiplexing streams RANK, the uplink information transmission overhead in the current sending mode is huge.

[0004] Summary of the Invention

[0005] The present application provides a communication method and apparatus that reduce uplink information transmission overhead.

[0006] To achieve the above objectives, this application adopts the following technical solutions:

[0007] In a first aspect, a communication method is provided, which is applied to a terminal. The method may be performed by the terminal, a component or device (e.g., a processor, chip, or chip system) applied to the terminal, or a logic module or software that implements all or part of the terminal's functions. The method includes: receiving first information indicating that an uplink signal is to be transmitted based on a downlink reference signal, and second information indicating resource configuration parameters for uplink transmission. An uplink signal is transmitted based on the second information and an uplink precoding, wherein the uplink precoding is determined based on the downlink reference signal, and the uplink signal includes an uplink data signal and / or an uplink demodulation reference signal.

[0008] In the first aspect, the network device instructs the terminal to send an uplink signal based on the downlink reference signal, as well as the resource configuration parameters during uplink transmission, so that the terminal can send the uplink signal. There is no need to transmit SRS between the terminal and the network device, realizing a "simplified uplink transmission mode" and greatly reducing the uplink transmission overhead.

[0009] In one possible implementation, the method also includes: receiving third information, the third information indicating resource configuration parameters of a target downlink reference signal; receiving the target downlink reference signal according to the third information; and sending an uplink signal according to the second information and the uplink precoding, including: sending an uplink signal according to the second information and the target uplink precoding, wherein the target uplink precoding is determined based on the target downlink reference signal.

[0010] In this implementation, the network device configures the terminal with resource configuration parameters of the target downlink reference signal used to send the uplink signal, which can ensure the successful transmission of the uplink signal in the "simplified uplink transmission mode".

[0011] In one possible implementation, the second information includes: time-frequency resource parameters of uplink transmission, the first parameter, and downlink reference signal trigger indication information, the first parameter includes at least one of the modulation and coding scheme and the number of spatial division multiplexing streams; receiving the third information includes: receiving the third information after receiving the downlink reference signal trigger indication information.

[0012] In this implementation, the second information configures the parameters required for uplink transmission and also configures downlink reference signal trigger indication information for triggering reception of the third information, which can ensure the transmission of uplink signals in the "simplified uplink transmission mode".

[0013] In a possible implementation, the second information includes: a time-frequency resource parameter of uplink transmission and a first parameter, where the first parameter includes at least one of a modulation and coding scheme and a number of spatial division multiplexing streams.

[0014] In this implementation, the second information configures some parameters required for uplink transmission, which can ensure uplink signal transmission in the "simplified uplink transmission mode".

[0015] In a possible implementation, the modulation and coding scheme includes one or more modulation and coding schemes, and the number of spatial division multiplexing streams includes one or more number of spatial division multiplexing streams.

[0016] In this implementation, one or more modulation and coding schemes (number of spatial division multiplexing streams) are set, enabling the terminal to send uplink signals.

[0017] In a possible implementation, the time-frequency resource parameters of the target downlink reference signal are determined according to preset downlink resource parameters and / or resource configuration parameters during uplink transmission.

[0018] In this implementation, three rules for determining the time-frequency resource parameters of the target downlink reference signal are designed, which can be used by the terminal to send uplink signals.

[0019] In a possible implementation, the second information is carried in a radio resource control message, or the second information is carried in a medium access control message, or the second information is carried in a downlink control information message.

[0020] In this implementation, several possible message types carrying the second information are provided.

[0021] In one possible implementation, the method also includes: receiving fourth information, the fourth information indicating the antenna port corresponding to the transmission of the uplink signal; sending the uplink signal according to the second information and the uplink precoding, including: sending the uplink signal on the antenna port corresponding to the uplink signal according to the second information and the uplink precoding.

[0022] In this implementation, the network device configures the antenna port for sending uplink signals to the terminal through the fourth information, which can ensure the uplink signal transmission in the "simplified uplink transmission mode".

[0023] In a second aspect, a communication method is provided, which is applied to a network device. The execution subject of the method can be the network device, or a component or device (such as a processor, chip, or chip system) applied to the network device, or a logic module or software that can implement all or part of the network device functions. The method includes: sending first information and second information, the first information indicating that an uplink signal is sent according to a downlink reference signal, and the second information indicating resource configuration parameters during uplink transmission; receiving an uplink signal, wherein the uplink precoding of the uplink signal is determined according to the downlink reference signal, and the uplink signal includes an uplink data signal and / or an uplink demodulation reference signal.

[0024] In the second aspect, the network device instructs the terminal to send an uplink signal based on the downlink reference signal, as well as the resource configuration parameters during uplink transmission, so that the terminal can send the uplink signal. There is no need to transmit SRS between the terminal and the network device, realizing a "simplified uplink transmission mode" and greatly reducing the uplink transmission overhead.

[0025] In a possible implementation, the method further includes: sending third information indicating a resource configuration parameter of a target downlink reference signal; and sending the target downlink reference signal, where the target downlink reference signal is used to determine uplink precoding of the uplink signal.

[0026] In this implementation, the network device configures the terminal with resource configuration parameters of the target downlink reference signal used to send the uplink signal, which can ensure the successful transmission of the uplink signal in the "simplified uplink transmission mode".

[0027] In one possible implementation, the second information includes: time-frequency resource parameters of uplink transmission, the first parameter, and downlink reference signal trigger indication information, where the first parameter includes at least one of a modulation and coding scheme and a number of spatial division multiplexing streams.

[0028] In this implementation, the second information configures the parameters required for uplink transmission and also configures downlink reference signal trigger indication information for triggering reception of the third information, which can ensure the transmission of uplink signals in the "simplified uplink transmission mode".

[0029] In a possible implementation, the second information includes: a time-frequency resource parameter of uplink transmission and a first parameter, where the first parameter includes at least one of a modulation and coding scheme and a number of spatial division multiplexing streams.

[0030] In this implementation, the second information configures some parameters required for uplink transmission, which can ensure uplink signal transmission in the "simplified uplink transmission mode".

[0031] In a possible implementation, the modulation and coding scheme includes one or more modulation and coding schemes, and the number of spatial division multiplexing streams includes one or more number of spatial division multiplexing streams.

[0032] In this implementation, one or more modulation and coding schemes (number of spatial division multiplexing streams) are set, enabling the terminal to send uplink signals.

[0033] In a possible implementation, the time-frequency resource parameters of the target downlink reference signal are determined according to preset downlink resource parameters and / or resource configuration parameters during uplink transmission.

[0034] In this implementation, three rules for determining the time-frequency resource parameters of the target downlink reference signal are designed, which can be used by the terminal to send uplink signals.

[0035] In a possible implementation, the second information is carried in a radio resource control message, or the second information is carried in a medium access control message, or the second information is carried in a downlink control information message.

[0036] In this implementation, several possible message types carrying the second information are provided.

[0037] In a possible implementation, the method further includes: sending fourth information, where the fourth information indicates an antenna port corresponding to transmitting the uplink signal.

[0038] In this implementation, the network device configures the antenna port for sending uplink signals to the terminal through the fourth information, which can ensure the uplink signal transmission in the "simplified uplink transmission mode".

[0039] In a third aspect, a communication method is provided, which is applied to a terminal. The execution subject of the method can be the terminal, or a component or device applied to the terminal (such as a processor, chip, or chip system, etc.), or a logic module or software that can realize all or part of the terminal functions. The method includes: receiving fifth information, the fifth information indicating a generation mode of uplink precoding; when the fifth information indicates that an uplink signal is sent according to a downlink reference signal, receiving second information, the second information indicating a resource configuration parameter during uplink transmission; sending an uplink signal according to the second information and the uplink precoding, wherein the uplink precoding is determined according to the downlink reference signal, and the uplink signal includes an uplink data signal and / or an uplink demodulation reference signal.

[0040] In the third aspect, the network device instructs the terminal on the generation mode of uplink precoding, and when instructing to send an uplink signal according to a downlink reference signal, sends the resource configuration parameters for uplink transmission to the terminal for the terminal to send an uplink signal. Uplink transmission can be achieved between the terminal and the network device without transmitting SRS, thereby realizing a "simplified uplink transmission mode" and greatly reducing the uplink transmission overhead.

[0041] In a fourth aspect, a communication method is provided, which is applied to a network device. The execution subject of the method can be a network device, or a component or device (such as a processor, chip, or chip system) applied to the network device, or a logic module or software that can realize all or part of the functions of the network device. The method includes: sending fifth information, the fifth information indicating the generation mode of uplink precoding; when the fifth information indicates that an uplink signal is sent according to a downlink reference signal, sending second information, the second information indicating resource configuration parameters during uplink transmission; receiving an uplink signal, wherein the uplink precoding of the uplink signal is determined according to the downlink reference signal, and the uplink signal includes an uplink data signal and / or an uplink demodulation reference signal.

[0042] In the fourth aspect, the network device instructs the terminal on the generation mode of uplink precoding, and when instructing to send an uplink signal according to a downlink reference signal, sends the resource configuration parameters for uplink transmission to the terminal for the terminal to send an uplink signal. Uplink transmission can be achieved between the terminal and the network device without transmitting SRS, thereby realizing a "simplified uplink transmission mode" and greatly reducing the uplink transmission overhead.

[0043] In a fifth aspect, a communication device is provided, which may be a terminal or a chip or system on chip in a terminal. The communication device may implement the functions performed by the terminal in the above-mentioned first aspect or the possible design of the first aspect, and the functions may be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions. For example, the communication device includes: a transceiver module for receiving first information and second information, the first information indicating that an uplink signal is sent according to a downlink reference signal, and the second information indicating resource configuration parameters during uplink transmission; the transceiver module is also used to send an uplink signal according to the second information and an uplink precoding, wherein the uplink precoding is determined according to the downlink reference signal, and the uplink signal includes an uplink data signal and / or an uplink demodulation reference signal.

[0044] In one possible implementation, the transceiver module is also used to receive third information, where the third information indicates resource configuration parameters of a target downlink reference signal; the transceiver module is also used to receive a target downlink reference signal based on the third information; the transceiver module is specifically used to send an uplink signal based on the second information and the target uplink precoding, wherein the target uplink precoding is determined based on the target downlink reference signal.

[0045] In one possible implementation, the second information includes: time-frequency resource parameters of uplink transmission, the first parameter, and downlink reference signal trigger indication information, the first parameter includes at least one of the modulation and coding scheme and the number of spatial division multiplexing streams; the transceiver module is specifically used to receive the third information after receiving the downlink reference signal trigger indication information.

[0046] In a possible implementation, the second information includes: a time-frequency resource parameter of uplink transmission and a first parameter, where the first parameter includes at least one of a modulation and coding scheme and a number of spatial division multiplexing streams.

[0047] In a possible implementation, the modulation and coding scheme includes one or more modulation and coding schemes, and the number of spatial division multiplexing streams includes one or more number of spatial division multiplexing streams.

[0048] In a possible implementation, the time-frequency resource parameters of the target downlink reference signal are determined according to preset downlink resource parameters and / or resource configuration parameters during uplink transmission.

[0049] In a possible implementation, the second information is carried in a radio resource control message, or the second information is carried in a medium access control message, or the second information is carried in a downlink control information message.

[0050] In one possible implementation, the transceiver module is further configured to receive fourth information, where the fourth information indicates an antenna port corresponding to transmitting an uplink signal;

[0051] The transceiver module is specifically configured to send an uplink signal on an antenna port corresponding to the uplink signal according to the second information and uplink precoding.

[0052] In another example, the communication device provided in the fifth aspect can implement the functions performed by the terminal in the above-mentioned third aspect or the possible design of the third aspect. For example, the communication device includes: a transceiver module for receiving fifth information, the fifth information indicating the generation mode of uplink precoding; the transceiver module is also used to receive second information when the fifth information indicates that an uplink signal is to be sent according to a downlink reference signal, the second information indicating the resource configuration parameters during uplink transmission; the transceiver module is also used to send an uplink signal according to the second information and the uplink precoding, wherein the uplink precoding is determined according to the downlink reference signal, and the uplink signal includes an uplink data signal and / or an uplink demodulation reference signal.

[0053] In a sixth aspect, a communication device is provided, which may be a network device or a chip or system on chip in a network device. The communication device may implement the functions performed by the network device in the above-mentioned second aspect or a possible design of the second aspect, and the functions may be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions. For example, the communication device includes: a transceiver module for sending first information and second information, the first information indicating that an uplink signal is sent according to a downlink reference signal, and the second information indicating resource configuration parameters during uplink transmission; the transceiver module is also used to receive an uplink signal, wherein the uplink precoding of the uplink signal is determined according to the downlink reference signal, and the uplink signal includes an uplink data signal and / or an uplink demodulation reference signal.

[0054] In one possible implementation, the transceiver module is further used to send third information, where the third information indicates resource configuration parameters of a target downlink reference signal; the transceiver module is further used to send a target downlink reference signal, where the target downlink reference signal is used to determine uplink precoding of an uplink signal.

[0055] In one possible implementation, the second information includes: time-frequency resource parameters of uplink transmission, the first parameter, and downlink reference signal trigger indication information, where the first parameter includes at least one of a modulation and coding scheme and a number of spatial division multiplexing streams.

[0056] In a possible implementation, the second information includes: a time-frequency resource parameter of uplink transmission and a first parameter, where the first parameter includes at least one of a modulation and coding scheme and a number of spatial division multiplexing streams.

[0057] In a possible implementation, the modulation and coding scheme includes one or more modulation and coding schemes, and the number of spatial division multiplexing streams includes one or more number of spatial division multiplexing streams.

[0058] In a possible implementation, the time-frequency resource parameters of the target downlink reference signal are determined according to preset downlink resource parameters and / or resource configuration parameters during uplink transmission.

[0059] In a possible implementation, the second information is carried in a radio resource control message, or the second information is carried in a medium access control message, or the second information is carried in a downlink control information message.

[0060] In a possible implementation, the transceiver module is further configured to send fourth information, where the fourth information indicates an antenna port corresponding to the transmission of the uplink signal.

[0061] In another example, the communication device provided in the sixth aspect can implement the functions performed by the terminal in the above-mentioned fourth aspect or the possible design of the fourth aspect. For example, the communication device includes: a transceiver module for sending fifth information, the fifth information indicating the generation mode of uplink precoding; the transceiver module is also used to send second information when the fifth information indicates that an uplink signal is to be sent according to a downlink reference signal, the second information indicating the resource configuration parameters during uplink transmission; the transceiver module is also used to receive an uplink signal, wherein the uplink precoding of the uplink signal is determined according to the downlink reference signal, and the uplink signal includes an uplink data signal and / or an uplink demodulation reference signal.

[0062] In a seventh aspect, the present application provides a communication device, comprising a processor configured to execute the methods of aspects 1 to 4. Furthermore, the communication device may further comprise a memory storing computer instructions, and the processor may execute the computer instructions to execute the methods of aspects 1 to 4. Furthermore, the communication device may further comprise a transceiver configured to execute the methods of aspects 1 to 4.

[0063] In an eighth aspect, the present application provides a computer-readable storage medium, which stores computer instructions. When the computer instructions are executed, the methods of the first to fourth aspects are executed.

[0064] In a ninth aspect, the present application provides a computer program product comprising instructions, which, when executed on a computer, enables the computer to execute the methods of the first to fourth aspects described above.

[0065] In a tenth aspect, the present application provides a chip comprising a processor and a communication interface, wherein the processor and the communication interface are used to support the chip in executing the methods of the first to fourth aspects.

[0066] In an eleventh aspect, the present application provides a communication system, comprising a terminal and a network device, wherein the terminal is configured to execute the method of the first aspect or the third aspect, and the access network device is configured to execute the method of the second aspect or the fourth aspect.

[0067] Among them, the beneficial effects described in aspects 5 to 11 of this application can refer to the analysis of the beneficial effects of aspects 1 to 4, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] FIG1 is a schematic diagram of the structure of a communication system provided in an embodiment of the present application;

[0069] FIG2 is a flow chart of a communication method provided in an embodiment of the present application;

[0070] FIG3 is a flow chart of another communication method provided in an embodiment of the present application;

[0071] FIG4 is a flow chart of another communication method provided in an embodiment of the present application;

[0072] FIG5 is a flow chart of another communication method provided in an embodiment of the present application;

[0073] FIG6 is a schematic structural diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0074] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Ordinary technicians in this field will know that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0075] It should be noted that the terms "first" and "second" in the specification, claims, and drawings of this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products, or devices.

[0076] It should be understood that in the embodiments of the present application, "at least one (item)" refers to one or more, "more than one" refers to two or more, "at least two (items)" refers to two or three and more than three, and "and / or" is used to describe the association relationship of associated objects, indicating that three relationships can exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple. It should be understood that in the embodiments of the present application, "B corresponding to A" means that B is associated with A. For example, B can be determined based on A. It should also be understood that determining B based on A does not mean determining B based solely on A; B can also be determined based on A and / or other information. In addition, the "connection" in the embodiments of the present application refers to various connection methods, such as direct connection or indirect connection, to achieve communication between devices, and the embodiments of the present application do not impose any limitation on this.

[0077] Unless otherwise specified, the "transmission" (transmit / transmission) appearing in the embodiments of the present application refers to bidirectional transmission, including the actions of sending and / or receiving. Specifically, the "transmission" in the embodiments of the present application includes the sending of data, the receiving of data, or the sending of data and the receiving of data. In other words, the data transmission here includes uplink and / or downlink data transmission. Data may include channels and / or signals, uplink data transmission is uplink channel and / or uplink signal transmission, and downlink data transmission is downlink channel and / or downlink signal transmission. The "network" and "system" appearing in the embodiments of the present application express the same concept, and the communication system is the communication network.

[0078] Before introducing the embodiments of the present application, some terms involved in the embodiments of the present application are explained.

[0079] CB-based uplink (UL) transmission mode:

[0080] The base station will configure the terminal with one or two multi-port sounding reference signal resource sets (SRS Resource Sets), assuming the number of SRS ports is P. The terminal transmits one or two SRS signals from P ports through the SRS resources. Different SRS resources can have different beam directions. The base station measures uplink channel state information (CSI) based on the SRS signals. When uplink data needs to be sent, the base station schedules uplink resources and indicates the following information:

[0081] 1) An index indicating which SRS resource to use (SRS resource indicator, SRI), indicating uplink beam information.

[0082] 2) In the beam corresponding to the SRS resource, the number of uplink layers L and the transmission precoding matrix indicator (TPMI) are included, and multiple demodulation reference signal (DMRS) ports are configured, where the number of DMRS ports is equal to L.

[0083] The terminal receives the above configuration information, inserts the DMRS signals of L ports into L data streams, and then precodes them according to the TPMI instruction to obtain signals of P ports; the terminal then sends the signals of P ports using the same sending method as the previous P port SRS signal.

[0084] UL transmission method based on NCB:

[0085] The base station configures P single-port SRS resources belonging to the same SRS resource set for the terminal. The beam directions of these P single-port SRSs can be different. The base station sends a downlink channel state information-reference signal (CSI-RS) to the terminal.

[0086] Based on the downlink CSI-RS, the terminal measures the downlink channel state information relative to P single ports. Based on channel heterogeneity, it infers the uplink channel state information and calculates the corresponding SRS signal transmission method (digital precoding or analog precoding). Based on the calculated SRS signal transmission method, the terminal then transmits the uplink SRS signal using the SRS resources of the P single ports.

[0087] The base station receives P SRS signals and selects L SRS signals with less interference and noise. It then sends the indexes (SRIs) of these L SRS signals to the terminal via downlink control information (DCI). The base station also configures a multi-port DMRS for the terminal, where the number of DMRS ports is L.

[0088] The terminal receives the DCI and, according to the instruction of the DCI, inserts the DMRS signals of the L ports into the L data streams, and then sends them in the same sending manner as the L SRS signals sent previously.

[0089] In the new generation of mobile communication systems, with the significant increase in the number of terminals and ranks, if the terminal's uplink transmission is still sent in CB or NCB mode, it will lead to a complicated transmission process, further increasing the resource scheduling overhead of the base station; and increase the transmission delay of uplink data; it will also increase the overhead of uplink data transmission.

[0090] In order to solve the above technical problems, an embodiment of the present application provides a communication method. The method provided by the embodiment of the present application is described below in conjunction with the drawings in the specification.

[0091] The communication method provided in the embodiment of the present application can be applied to various communication systems, such as: 6th generation mobile networks (6G) communication system, long term evolution (LTE) system, fifth generation (5G) mobile communication system, wireless fidelity (WiFi) system, future communication system, or a system integrating multiple communication systems, etc., which is not limited in the embodiment of the present application. Among them, 5G can also be called new radio (NR). As long as there are two entities in the communication system, and one of the entities can send information to the other entity, or receive information sent by the other entity, the communication method provided in the embodiment of the present application can be implemented. The information here can be physical signals such as preambles and reference signals; physical layer control information such as downlink control information (DCI) and uplink control information (UCI); control plane (CP) data such as radio resource control (RRC) messages; user plane (UP) data; and other information related to specific scenarios or applications, such as relevant data enabled or generated by artificial intelligence (AI) and machine learning (ML) (such as gradient information, training data, model parameters, etc.), and relevant data enabled by or generated by sensing.

[0092] The communication method provided in the embodiments of the present application can be applied to various communication scenarios, for example, it can be applied to one or more of the following communication scenarios: enhanced mobile broadband (eMBB), ultra-reliable low latency communication (URLLC), machine type communication (MTC), massive machine type communication (mMTC), device to device (D2D), vehicle to everything (V2X), vehicle to vehicle (V2V), and Internet of Things (IoT), etc.

[0093] The embodiments of the present application can be used for transmission based on dynamic authorization, and can also be used for authorization-free transmission such as 2-step / 4-step random access (RA) or preconfigured uplink resource (PUR) / configured grant (CG). The embodiments of the present application can be used in high-frequency scenarios, such as millimeter wave and THz scenarios, and can also be used in low-frequency scenarios, such as 700 / 900MHz, 2.1 / 2.6 / 3.5GHz frequency bands, etc. The embodiments of the present application can be used in licensed frequency bands, and can also be used in unlicensed frequency bands. The embodiments of the present application can be used for the air interface Uu link between the terminal and the network device, and can also be used for sidelinks such as D2D, and can also be used for non-terrestrial network (NTN) communication links.

[0094] The embodiments of the present application can be applied to a terminal in a connected state or an active state (ACTIVE), a terminal in a non-connected state (INACTIVE) or an idle state (IDLE), and a terminal that is not in the above three states, such as a terminal that is not attached to the network or is not synchronized with the network downlink.

[0095] The communication method provided in the embodiment of the present application is described below using the communication system shown in FIG1 as an example.

[0096] FIG1 is a schematic diagram of a communication system provided in an embodiment of the present application. As shown in FIG1 , the communication system may include:

[0097] Multiple network devices and multiple terminals. A network device can cover one or more cells, such as: network device 1 covers cell 1, network device 2 covers cell 2, and network device 3 covers cell 3 (in this example, the network device covers one cell as an example. In the specific implementation, the network device can also cover multiple cells without limitation). Network device 1, network device 2, and network device 3 can be the same device or different devices. The terminal receives the service of the network device in one of cell 1, cell 2, and cell 3 and is in a connected state. The terminal sends data to the network device via the uplink.

[0098] It should be noted that Figure 1 is only an exemplary framework diagram. The number of nodes, number of cells, and terminal status included in Figure 1 are not limited. In addition to the functional nodes shown in Figure 1, other nodes may also be included, such as core network devices, gateway devices, application servers, etc., without limitation. Network devices communicate with core network devices via wired or wireless means, such as through next-generation (NG) interfaces.

[0099] Among them, the network device is mainly used to implement at least one function of resource scheduling, wireless resource management, and wireless resource control of the terminal. Specifically, the network device may include any node among a base station, a wireless access point, a transmission receive point (TRP), a transmission point (TP), and some other access nodes. In the embodiment of the present application, the device for implementing the function of the network device can be a network device; it can also be a device that can support the network device to implement the function, such as a chip system, which can be installed in the network device or used in combination with the network device.

[0100] Terminal equipment can be user equipment (UE), mobile station (MS) or mobile terminal (MT), etc. Specifically, the terminal can be a mobile phone, tablet computer or computer with wireless transceiver function, or a virtual reality (VR) terminal, augmented reality (AR) terminal or other similar device.

[0101] (augmented reality, AR) terminals, wireless terminals in industrial control, wireless terminals in unmanned driving, wireless terminals in telemedicine, wireless terminals in smart grids, wireless terminals in smart cities, smart homes, or vehicle-mounted terminals, etc. In the embodiments of the present application, the device for implementing the function of the terminal device can be a terminal, or a device that can support the terminal to implement the function, such as a chip system, which can be installed in the terminal or used in combination with the terminal.

[0102] FIG2 shows a flow chart of a communication method provided in an embodiment of the present application. As shown in FIG2 , the method may include the following steps:

[0103] S210: The network device sends first information and second information to the terminal. Correspondingly, the terminal receives the first information and the second information.

[0104] The first information indicates that an uplink signal is sent according to a downlink reference signal. In other words, compared to the current mode of transmitting uplink signals through SRS resources based on the CB / NCB method, the first information instructs the terminal to start a "simplified uplink transmission mode (simplified UL Mode)" that does not require SRS transmission. In this mode, the uplink precoding of the uplink signal is generated based on the downlink reference signal. The first information can be carried through multiple types of messages. For example, the first information can be carried in a radio resource control (RRC) message, or the first information can also be carried in a media access control (MAC) message.

[0105] The second information indicates resource configuration parameters during uplink transmission. The second information can be carried by multiple messages. For example, the second information can be carried in RRC, or the second information can also be carried in MAC, or the second information can also be carried in DCI.

[0106] S220: The terminal sends an uplink signal to the network device according to the second information and the uplink precoding. Correspondingly, the network device receives the uplink signal.

[0107] Among them, after receiving the first information, the terminal turns on the "simplified uplink transmission mode" and sends an uplink signal to the network device according to the second information and the uplink precoding. The uplink precoding UL Precoder is determined according to the downlink reference signal. The downlink reference signal can be a downlink reference signal received by the terminal from the network device at a past time close to the current time, or it can be pre-agreed between the terminal and the network device, or it can be pre-configured through a protocol, or it can be instantly configured by the network device to the terminal. The implementation method of the instant configuration will be explained in S310-S330. The uplink signal is an uplink data signal, for example, a downlink physical shared channel (PUSCH) signal. Alternatively, the uplink signal is an uplink demodulation reference signal (DMRS).

[0108] The UL Antenna Ports corresponding to the terminal's uplink signal transmission can be pre-agreed between the terminal and the network device, pre-configured through a protocol, or instantly indicated to the terminal by the network device. In "simplified uplink transmission mode (Simplified UL Mode), the antenna ports transmitting uplink signals are associated with the downlink reference signal, rather than the uplink reference signal (SRS).

[0109] The implementation of the immediacy indication will be described in S410.

[0110] In an embodiment of the present application, the network device instructs the terminal to send an uplink signal based on the downlink reference signal, as well as the resource configuration parameters during uplink transmission, so that the terminal can send the uplink signal. There is no need to transmit SRS between the terminal and the network device, thereby realizing a "simplified uplink transmission mode" and greatly reducing the uplink transmission overhead.

[0111] In comparison, in the existing CB mode, the UL transmission process is: UL transmission SRS -> downlink DL transmission DCI -> UL transmission PUSCH. In the existing NCB mode, the UL transmission process is: DL transmission CSI-RS -> UL transmission SRS -> DL transmission DCI -> UL transmission PUSCH. In contrast, in the simplified uplink mode of this embodiment, the UL transmission process is: DL transmission DCI or CSI-RS -> UL transmission PUSCH. It is not difficult to see that the simplified uplink mode of this embodiment greatly reduces uplink transmission overhead.

[0112] In one embodiment, as shown in FIG3 , the method may further include:

[0113] S310: The network device sends third information to the terminal. Correspondingly, the terminal receives the third information.

[0114] The third information indicates the resource configuration parameters of the target downlink reference signal. The time-frequency resource parameters of the target downlink reference signal can be determined based on the preset downlink resource parameters and / or the resource configuration parameters during uplink transmission. The terminal can receive the target downlink reference signal based on the third information. The time when the terminal receives the third information can be pre-agreed between the terminal and the network device, or pre-configured through a protocol, or can be immediately indicated to the terminal by the network device. The third information can be sent periodically, semi-periodically, or aperiodically, without limitation.

[0115] S320: The network device sends a target downlink reference signal to the terminal. Correspondingly, the terminal receives the target downlink reference signal according to the third information.

[0116] Wherein, upon receiving the target downlink reference signal, the terminal may send an uplink signal based on the target downlink reference signal. Exemplarily, the target downlink reference signal may be a channel state information reference signal (CSI-RS). Accordingly, in this embodiment, S220 may include:

[0117] S330: The terminal sends an uplink signal to the network device according to the second information and the target uplink precoding. Correspondingly, the network device receives the uplink signal.

[0118] The target uplink precoding is determined according to the target downlink reference signal.

[0119] In the embodiment of the present application, the resource configuration parameters of the target downlink reference signal applied to the uplink signal are configured to the terminal by the network device, which can ensure the successful transmission of the uplink signal in the "simplified uplink transmission mode".

[0120] In one embodiment, the second information may include: time-frequency resource parameters of uplink transmission, the first parameter, and downlink reference signal triggering indication information.

[0121] The first parameter includes at least one of a modulation and coding scheme and a number of spatial division multiplexing streams. The modulation and coding scheme includes one or more modulation and coding schemes, and the number of spatial division multiplexing streams includes one or more numbers of spatial division multiplexing streams. In S310, it is described that the transmission time of the third information can be a network device's immediate indication to the terminal, and the information used in this indication is the downlink reference signal trigger indication information in the second information. Upon receiving the downlink reference signal trigger indication information, the terminal triggers reception of the third information.

[0122] When the modulation and coding scheme (or number of spatial division multiplexing streams) includes multiple options, the network device can configure multiple optional MCS sets and / or Rank set parameters for the terminal in a semi-static or dynamic manner. The network device can also bundle different MCS and / or Rank selections with different uplink signal parameters (such as DMRS) and send them to the terminal. The terminal can select the modulation and coding scheme (or number of spatial division multiplexing streams) for sending uplink signals from multiple modulation and coding schemes (or number of spatial division multiplexing streams).

[0123] After receiving the uplink signal sent by the terminal, the network device can determine the MCS or Rank selected by the terminal through blind detection. Specifically, the network device can try different MCS options in the optional MCS set until the decoding is correct; similarly, the network device can try different Rank options in the optional Rank set until the decoding is correct.

[0124] In an embodiment of the present application, the second information configures the parameters required for uplink transmission, and also configures the downlink reference signal trigger indication information that triggers the reception of the third information, which can ensure the transmission of uplink signals under the "simplified uplink transmission mode".

[0125] In one embodiment, the second information includes: a time-frequency resource parameter of uplink transmission and a first parameter, where the first parameter includes at least one of a modulation and coding scheme and a number of spatial division multiplexing streams.

[0126] In S310, it is described that the transmission time of the third information can be pre-agreed between the terminal and the network device, or pre-configured through a protocol. In both scenarios, the terminal can determine when to receive the third information without the need for an indication from the network device. No downlink reference signal trigger indication information is configured in the second information.

[0127] In the embodiment of the present application, the second information configures some parameters required for uplink transmission, which can ensure the uplink signal transmission under the "simplified uplink transmission mode".

[0128] In one embodiment, as shown in FIG4 , the method may further include:

[0129] S410: The network device sends fourth information to the terminal. Correspondingly, the terminal receives the fourth information.

[0130] The fourth information indicates the UL Antenna Ports corresponding to the uplink signal. The terminal may send the uplink signal based on the UL Antenna Ports indicated by the fourth information. That is, in this embodiment, S220 may include:

[0131] S420: The terminal sends an uplink signal to the network device on the UL Antenna Ports indicated by the fourth information according to the second information and uplink precoding. Correspondingly, the network device receives the uplink signal.

[0132] In the embodiment of the present application, the network device configures the UL Antenna Ports for sending uplink signals to the terminal through the fourth information, which can ensure the uplink signal transmission under the "simplified uplink transmission mode".

[0133] In an embodiment of the present application, the network device instructs the terminal to send an uplink signal based on the downlink reference signal, as well as the resource configuration parameters during uplink transmission, so that the terminal can send the uplink signal. Uplink transmission can be achieved between the terminal and the network device without transmitting SRS, thereby realizing a "simplified uplink transmission mode" and greatly reducing the uplink transmission overhead.

[0134] FIG5 shows a flow chart of another communication method provided by an embodiment of the present application. As shown in FIG5 , the method may include the following steps:

[0135] S510: The network device sends fifth information to the terminal, and correspondingly, the terminal receives the fifth information.

[0136] The fifth information indicates the generation mode of the uplink precoder. In this embodiment, the network device can configure the generation mode of the uplink precoder based on information such as the communication environment. The configured uplink precoder generation mode can be to generate the uplink precoder by transmitting the SRS. The specific implementation of generating the uplink precoder by transmitting the SRS can refer to the existing technology and will not be described in detail. It can also be the generation mode under the "simplified uplink transmission mode" in the above-mentioned embodiment of this application, that is, the fifth information indicates that the uplink signal is sent according to the downlink reference signal.

[0137] S520: When the fifth information indicates that an uplink signal is to be sent according to the downlink reference signal, the network device sends second information to the terminal, and accordingly, the terminal receives the second information.

[0138] The second information indicates resource configuration parameters during uplink transmission. For a detailed description of the second information, please refer to the description of S210 and will not be repeated here.

[0139] S530: The terminal sends an uplink signal to the network device according to the second information and the uplink precoding. Correspondingly, the network device receives the uplink signal.

[0140] The uplink precoding is determined based on a downlink reference signal, and the uplink signal includes an uplink data signal and / or an uplink demodulation reference signal. Detailed description of this step can be found in the description of S220 and will not be repeated here.

[0141] It should be understood that when the "simplified uplink transmission mode" is implemented in this embodiment, steps S310-S330 and / or S410 may also be performed to achieve corresponding beneficial effects, which will not be described in detail.

[0142] In an embodiment of the present application, the network device instructs the terminal on a generation mode of uplink precoding, and when instructing to send an uplink signal according to a downlink reference signal, sends resource configuration parameters for uplink transmission to the terminal so that the terminal can send the uplink signal. Uplink transmission can be achieved between the terminal and the network device without transmitting SRS, thereby realizing a "simplified uplink transmission mode" and greatly reducing the uplink transmission overhead.

[0143] The above mainly introduces the solution provided by the embodiment of the present application from the perspective of the execution logic of each step. It is understandable that each node, such as a terminal, includes a hardware structure and / or software module corresponding to the execution of each function in order to implement the above functions. Those skilled in the art should easily appreciate that, in combination with the algorithm steps of each example described in the embodiment disclosed herein, the method of the embodiment of the present application can be implemented in the form of hardware, software, or a combination of hardware and computer software. Whether a function is executed in a hardware or computer software driven hardware manner depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0144] The embodiment of the present application can divide the terminal into functional modules according to the above method example. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical function division. In actual implementation, there may be other division methods.

[0145] In a specific implementation, each network element shown in this application, such as a terminal, may adopt the structure shown in Figure 6 or include the components shown in Figure 6. Figure 6 is a schematic diagram of the structure of a communication device provided in an embodiment of this application. When the communication device has the functions of a terminal described in an embodiment of this application, the communication device may be a chip or system-on-chip in a terminal or network device. When the communication device has the functions of a terminal described in an embodiment of this application, the communication device may be a chip or system-on-chip in a terminal or network device.

[0146] As shown in Figure 6, the communication device may include a processor 601, a communication line 602, a transceiver 603, and a memory 604. The processor 601, the memory 604, and the transceiver 603 may be connected via the communication line 602. In one example, the processor 601 may include one or more CPUs, such as CPU0 and CPU1 in Figure 6.

[0147] As an optional implementation manner, the communication device includes multiple processors. For example, in addition to the processor 601 in FIG. 6 , it may also include a processor 607 .

[0148] The processor 601 may be a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The processor 601 may also be other devices with processing functions, such as circuits, devices, or software modules.

[0149] The communication line 602 is used to transmit information between the components included in the communication device.

[0150] Transceiver 603 is used to communicate with other devices or other communication networks. Such other communication networks may be Ethernet, a radio access network (RAN), a wireless local area network (WLAN), etc. Transceiver 603 may be an interface circuit, a pin, a radio frequency module, a transceiver, or any other device capable of communication.

[0151] Furthermore, the communication device may further include a memory 604. The memory 604 is configured to store instructions, wherein the instructions may be computer programs.

[0152] The memory 604 may be a read-only memory (ROM) or other types of static storage devices that can store static information and / or instructions, or a random access memory (RAM) or other types of dynamic storage devices that can store information and / or instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM), or other optical disc storage, optical disk storage, magnetic disk storage media, or other magnetic storage devices. Optical disc storage includes compact discs, laser discs, optical discs, digital versatile discs, or Blu-ray discs, etc.

[0153] It should be noted that the memory 604 can exist independently of the processor 601 or can be integrated with the processor 601. The memory 604 can be used to store instructions, program code, or some data. The memory 604 can be located inside the communication device or outside the communication device, without limitation. When the processor 601 executes the instructions stored in the memory 604, the method provided in the embodiment of the present application can be implemented.

[0154] As an optional implementation, the communication apparatus further includes an output device 605 and an input device 606. For example, the input device 606 is a keyboard, a mouse, a microphone, a joystick, or the like, and the output device 605 is a display screen, a speaker, or the like.

[0155] It should be noted that the communication device may be a desktop computer, a portable computer, a network server, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system, or a device having a structure similar to that shown in FIG6 . Furthermore, the component structure shown in FIG6 does not limit the communication device. In addition to the components shown in FIG6 , the communication device may include more or fewer components than shown, or combine certain components, or arrange the components differently.

[0156] In the embodiment of the present application, the chip system can be composed of chips, or can include chips and other discrete devices.

[0157] The present application also provides a communication device for use in a terminal. Each module in the communication device has the function of implementing the corresponding steps of the communication method provided in the present application and can achieve the corresponding technical effects. The beneficial effects of the steps executed by each module can be referred to the description of the corresponding steps and will not be repeated here. The functions 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. The communication device can be a terminal device or a chip or system-on-chip in the terminal device.

[0158] The present application also provides a communication device for use in a network device. Each module in the communication device has the function of implementing the corresponding steps of the communication method provided in the present application and can achieve the corresponding technical effects. The beneficial effects of the steps performed by each module can be found in the description of the corresponding steps and will not be repeated here. The functions can be implemented in hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions. The communication device can be a network device or a chip or system-on-chip in the network device.

[0159] An embodiment of the present application also provides a communication system, which includes a terminal and a network device, and is used to implement the communication method provided in the embodiment of the present application and achieve its corresponding technical effects.

[0160] The embodiments of the present application also provide a computer-readable storage medium. All or part of the processes in the above-mentioned method embodiments can be completed by a computer program to instruct the relevant hardware, and the program can be stored in the above-mentioned computer-readable storage medium. When the program is executed, it can include the processes of the above-mentioned method embodiments. The computer-readable storage medium can be a terminal device of any of the above-mentioned embodiments, such as: an internal storage unit including a data sending end and / or a data receiving end, such as a hard disk or memory of the terminal device. The above-mentioned computer-readable storage medium can also be an external storage device of the above-mentioned terminal device, such as a plug-in hard disk, a smart memory card (smart media card, SMC), a secure digital (secure digital, SD) card, a flash card (flash card), etc. equipped on the above-mentioned terminal device. Furthermore, the above-mentioned computer-readable storage medium can also include both the internal storage unit of the above-mentioned terminal device and an external storage device. The above-mentioned computer-readable storage medium is used to store the above-mentioned computer program and other programs and data required by the above-mentioned terminal device. The above-mentioned computer-readable storage medium can also be used to temporarily store data that has been output or is to be output.

[0161] The present application also provides a computer instruction. All or part of the process in the above method embodiment can be completed by the computer instruction to instruct the relevant hardware (such as a computer, processor, network device, and terminal, etc.). The program can be stored in the above computer-readable storage medium.

[0162] The present application also provides a chip system. This chip system can be composed of a chip, or can include a chip and other discrete components, without limitation. The chip system includes a processor and a transceiver. All or part of the processes in the above method embodiments can be completed by the chip system. For example, the chip system can be used to implement the functions performed by the terminal in the above method embodiments, or to implement the functions performed by the network device in the above method embodiments.

[0163] In one possible design, the above-mentioned chip system also includes a memory, which is used to store program instructions and / or data. When the chip system is running, the processor executes the program instructions stored in the memory to enable the chip system to perform the functions performed by the terminal in the above-mentioned method embodiment or the functions performed by the network device in the above-mentioned method embodiment.

[0164] In the embodiments of the present application, the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present application. A general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of the present application may be directly implemented as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0165] In an embodiment of the present application, the memory may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), or a volatile memory (volatile memory), such as a random-access memory (RAM). The memory is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory in an embodiment of the present application may also be a circuit or any other device that can implement a storage function, for storing instructions and / or data.

[0166] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the modules or units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0167] The units described as separate components may or may not be physically separate, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0168] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit. If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions to enable a device, such as a single-chip microcomputer, a chip, etc., or a processor to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program code, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

[0169] The above is only a specific embodiment of the present application, but the scope of protection of this application is not limited to this. Any changes or substitutions within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A communication method, characterized in that: include: receiving first information and second information, wherein the first information indicates that an uplink signal is sent according to a downlink reference signal, and the second information indicates a resource configuration parameter during uplink transmission; An uplink signal is sent according to the second information and an uplink precoding, wherein the uplink precoding is determined according to a downlink reference signal, and the uplink signal includes an uplink data signal and / or an uplink demodulation reference signal.

2. The communication method according to claim 1, characterized in that: The method further comprises: receiving third information, where the third information indicates a resource configuration parameter of a target downlink reference signal; receiving the target downlink reference signal according to the third information; The sending an uplink signal according to the second information and uplink precoding includes: The uplink signal is sent according to the second information and a target uplink precoding, wherein the target uplink precoding is determined according to the target downlink reference signal.

3. The communication method according to claim 2, characterized in that: The second information includes: a time-frequency resource parameter of uplink transmission, a first parameter, and downlink reference signal trigger indication information, wherein the first parameter includes at least one of a modulation and coding scheme and a number of spatial division multiplexing streams; the receiving third information includes: After receiving the downlink reference signal triggering indication information, the third information is received.

4. The communication method according to claim 2, characterized in that: The second information includes: time-frequency resource parameters of uplink transmission and a first parameter, wherein the first parameter includes at least one of a modulation and coding scheme and a number of space-division multiplexing streams.

5. The communication method according to claim 3 or 4, characterized in that: The modulation and coding scheme includes one or more modulation and coding schemes, and the number of spatial division multiplexing streams includes one or more number of spatial division multiplexing streams.

6. The communication method according to any one of claims 2 to 5, characterized in that: The time-frequency resource parameters of the target downlink reference signal are determined according to preset downlink resource parameters and / or resource configuration parameters during the uplink transmission.

7. The communication method according to any one of claims 1 to 6, characterized in that: The second information is carried in a radio resource control message, or the second information is carried in a medium access control message, or the second information is carried in a downlink control information message.

8. The communication method according to any one of claims 1 to 7, characterized in that: The method further comprises: receiving fourth information, where the fourth information indicates an antenna port corresponding to transmitting the uplink signal; The sending an uplink signal according to the second information and uplink precoding includes: An uplink signal is sent on the antenna port corresponding to the uplink signal according to the second information and uplink precoding.

9. A communication method, characterized in that: include: Sending first information and second information, wherein the first information indicates that an uplink signal is sent according to a downlink reference signal, and the second information indicates a resource configuration parameter during uplink transmission; The uplink signal is received, wherein uplink precoding of the uplink signal is determined according to a downlink reference signal, and the uplink signal includes an uplink data signal and / or an uplink demodulation reference signal.

10. The communication method according to claim 9, characterized in that: The method further comprises: Sending third information, where the third information indicates a resource configuration parameter of a target downlink reference signal; The target downlink reference signal is sent, where the target downlink reference signal is used to determine uplink precoding of the uplink signal.

11. The communication method according to claim 10, characterized in that: The second information includes: time-frequency resource parameters of uplink transmission, first parameters, and downlink reference signal trigger indication information, and the first parameter includes at least one of a modulation and coding scheme and a number of space division multiplexing streams.

12. The communication method according to claim 10, characterized in that: The second information includes: time-frequency resource parameters of uplink transmission and a first parameter, wherein the first parameter includes at least one of a modulation and coding scheme and a number of space-division multiplexing streams.

13. The communication method according to claim 11 or 12, characterized in that: The modulation and coding scheme includes one or more modulation and coding schemes, and the number of spatial division multiplexing streams includes one or more number of spatial division multiplexing streams.

14. The communication method according to any one of claims 10 to 13, characterized in that: The time-frequency resource parameters of the target downlink reference signal are determined according to preset downlink resource parameters and / or resource configuration parameters during the uplink transmission.

15. The communication method according to any one of claims 9 to 14, characterized in that: The second information is carried in a radio resource control message, or the second information is carried in a medium access control message, or the second information is carried in a downlink control information message.

16. The communication method according to any one of claims 9 to 15, characterized in that: The method further comprises: Send fourth information, where the fourth information indicates an antenna port corresponding to transmitting the uplink signal.

17. A communication method, characterized in that: include: receiving fifth information, where the fifth information indicates a generation mode of uplink precoding; In a case where the fifth information indicates that an uplink signal is sent according to a downlink reference signal, receiving second information, wherein the second information indicates a resource configuration parameter during uplink transmission; An uplink signal is sent according to the second information and an uplink precoding, wherein the uplink precoding is determined according to a downlink reference signal, and the uplink signal includes an uplink data signal and / or an uplink demodulation reference signal.

18. A communication method, characterized in that: include: Sending fifth information, where the fifth information indicates a generation mode of uplink precoding; When the fifth information indicates that an uplink signal is sent according to a downlink reference signal, second information is sent, wherein the second information indicates a resource configuration parameter during uplink transmission; An uplink signal is received, wherein uplink precoding of the uplink signal is determined according to a downlink reference signal, and the uplink signal includes an uplink data signal and / or an uplink demodulation reference signal.

19. A communication device, characterized in that: include: A transceiver module, configured to receive first information and second information, wherein the first information indicates that an uplink signal is sent according to a downlink reference signal, and the second information indicates a resource configuration parameter during uplink transmission; The transceiver module is further used to send an uplink signal according to the second information and uplink precoding, wherein the uplink precoding is determined according to a downlink reference signal, and the uplink signal includes an uplink data signal and / or an uplink demodulation reference signal.

20. The communication device according to claim 19, characterized in that The transceiver module is further used to receive third information, where the third information indicates a resource configuration parameter of a target downlink reference signal; The transceiver module is further configured to receive the target downlink reference signal according to the third information; The transceiver module is specifically configured to send the uplink signal according to the second information and a target uplink precoding, wherein the target uplink precoding is determined according to the target downlink reference signal.

21. The communication device according to claim 20, characterized in that: The second information includes: time-frequency resource parameters of uplink transmission, first parameters, and downlink reference signal trigger indication information, the first parameter including at least one of a modulation and coding scheme and a number of spatial division multiplexing streams; the transceiver module is specifically used to receive the third information after receiving the downlink reference signal trigger indication information.

22. The communication device according to claim 20, characterized in that The second information includes: time-frequency resource parameters of uplink transmission and a first parameter, wherein the first parameter includes at least one of a modulation and coding scheme and a number of space-division multiplexing streams.

23. The communication device according to claim 21 or 22, characterized in that: The modulation and coding scheme includes one or more modulation and coding schemes, and the number of spatial division multiplexing streams includes one or more number of spatial division multiplexing streams.

24. The communication device according to any one of claims 20 to 23, characterized in that: The time-frequency resource parameters of the target downlink reference signal are determined according to preset downlink resource parameters and / or resource configuration parameters during the uplink transmission.

25. The communication device according to any one of claims 19 to 24, characterized in that: The second information is carried in a radio resource control message, or the second information is carried in a medium access control message, or the second information is carried in a downlink control information message.

26. The communication device according to any one of claims 19 to 25, characterized in that: The transceiver module is further used to receive fourth information, where the fourth information indicates an antenna port corresponding to the transmission of the uplink signal; The transceiver module is specifically configured to send an uplink signal on an antenna port corresponding to the uplink signal according to the second information and uplink precoding.

27. A communication device, characterized in that: include: A transceiver module, configured to send first information and second information, wherein the first information indicates that an uplink signal is sent according to a downlink reference signal, and the second information indicates a resource configuration parameter during uplink transmission; The transceiver module is further configured to receive the uplink signal, wherein the uplink precoding of the uplink signal is based on a downlink reference The signal determines that the uplink signal includes an uplink data signal and / or an uplink demodulation reference signal.

28. The communication device according to claim 27, characterized in that The transceiver module is further used to send third information, where the third information indicates a resource configuration parameter of a target downlink reference signal; The transceiver module is further used to send the target downlink reference signal, and the target downlink reference signal is used to determine the uplink precoding of the uplink signal.

29. The communication device according to claim 28, characterized in that The second information includes: time-frequency resource parameters of uplink transmission, first parameters, and downlink reference signal trigger indication information, and the first parameter includes at least one of a modulation and coding scheme and a number of space division multiplexing streams.

30. The communication device according to claim 28, characterized in that The second information includes: time-frequency resource parameters of uplink transmission and a first parameter, wherein the first parameter includes at least one of a modulation and coding scheme and a number of space-division multiplexing streams.

31. The communication device according to claim 29 or 30, characterized in that: The modulation and coding scheme includes one or more modulation and coding schemes, and the number of spatial division multiplexing streams includes one or more number of spatial division multiplexing streams.

32. The communication device according to any one of claims 28 to 31, characterized in that: The time-frequency resource parameters of the target downlink reference signal are determined according to preset downlink resource parameters and / or resource configuration parameters during the uplink transmission.

33. The communication device according to any one of claims 27 to 32, characterized in that: The second information is carried in a radio resource control message, or the second information is carried in a medium access control message, or the second information is carried in a downlink control information message.

34. The communication device according to any one of claims 27 to 33, characterized in that: The transceiver module is further used to send fourth information, where the fourth information indicates the antenna port corresponding to the transmission of the uplink signal.

35. A communication device, characterized in that: include: A transceiver module, configured to receive fifth information, where the fifth information indicates a generation mode of uplink precoding; The transceiver module is further configured to receive second information indicating a resource configuration parameter during uplink transmission when the fifth information indicates that an uplink signal is sent according to a downlink reference signal; The transceiver module is further used to send an uplink signal according to the second information and uplink precoding, wherein the uplink precoding is determined according to a downlink reference signal, and the uplink signal includes an uplink data signal and / or an uplink demodulation reference signal.

36. A communication device, characterized in that: include: A transceiver module, configured to send fifth information, where the fifth information indicates a generation mode of uplink precoding; The transceiver module is further configured to send second information when the fifth information indicates that an uplink signal is sent according to a downlink reference signal, wherein the second information indicates a resource configuration parameter during uplink transmission; The transceiver module is further used to receive an uplink signal, wherein the uplink precoding of the uplink signal is determined according to a downlink reference signal, and the uplink signal includes an uplink data signal and / or an uplink demodulation reference signal.

37. A communication device, characterized in that: The communication device comprises a processor, and the processor is used to execute the method according to any one of claims 1-18.

38. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and when the computer instructions are executed, the method according to any one of claims 1 to 18 is executed.

39. A chip, characterized in that: The chip includes a processor and a communication interface, and the processor and the communication interface are used to support the chip to execute the method according to any one of claims 1-18.

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