WO2023226833A1 - Sounding reference signal transmission method and communication apparatus - Google Patents

Abstract

Provided in the present application are an SRS transmission method and a communication apparatus. The number of uplink transmission streams (i.e. the number of SRS resources) and a pre-code of each stream are jointly indicated to a terminal device by using modulation coding information and SRI information, which respectively correspond to a plurality of code words. The number of activated code words is different (the number of code words needing to be transmitted is different), and the number of uplink transmission streams, which is indicated by the SRI information, belongs to a different number section, such that all possible numbers of uplink transmission streams, which need to be indicated by the SRI information, are divided into a plurality of number sections to be respectively indicated, that is, different numbers of activated code words correspond to different correspondences, and according to different correspondences, the terminal device can determine the number of SRS resources, which is indicated by the SRI information. The SRI information only needs to indicate the number of uplink transmission streams within one number section, such that the overheads of the SRI information can be reduced, resources occupied by an SRI are reduced, and the utilization rate of communication resources is improved.

Description

Method and communication device for detecting reference signal transmission

This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on May 27, 2022, with application number 202210594838.2 and the application title "Method and communication device for detecting reference signal transmission", the entire content of which is incorporated by reference. in this application.

Technical field

The present application relates to the field of communications, and more specifically, to a method and communication device for detecting reference signal transmission.

Background technique

The reference signal (RS), which can also be called a "pilot" signal, is a signal sent by the transmitting end device to the receiving end device for channel estimation or channel detection by the receiving end device. Reference signals are divided into uplink reference signals and downlink reference signals.

The uplink reference signal refers to the signal sent by the terminal equipment to the network equipment (access network equipment), that is, the sending end is the terminal equipment and the receiving end is the network equipment. The uplink reference signal is mainly used for two purposes: uplink channel estimation (for coherent demodulation and detection of network equipment or for calculating precoding) and uplink channel quality measurement. The uplink reference signal includes the sounding reference signal (SRS).

In scenarios where the purpose of SRS is non-codebook, when the network device schedules the terminal device for uplink transmission, the network device will indicate one or more to the terminal device through the detection reference signal resource indicator (SRS resource indicator, SRI). SRS resources, where each SRS resource corresponds to an uplink transmission stream of the terminal device. The precoding used by each uplink transmission stream is the precoding corresponding to the SRS resource indicating the uplink transmission stream. The terminal device determines according to the network According to the instructions of the device, one or more upstream data streams can be sent to the network device on the physical uplink shared channel (PUSCH).

With the improvement of terminal equipment capabilities, the current maximum number of upstream transmission streams supported by terminal equipment is 8 streams. Network equipment can configure up to 8 different SRS resources for terminal equipment through SRI information. When using SRI information to indicate multiple different SRS resources to the terminal device, the overhead of SRI information will be large, and more communication resources will be needed to send SRI, causing SRI to occupy more resources, resulting in a waste of resources.

Contents of the invention

This application provides an SRS transmission method and communication device, which uses modulation and coding information and SRI information corresponding to multiple codewords to jointly indicate the number of uplink transmission streams (ie, the number of SRS resources) and the precoding of each stream. In this way, the number of all possible upstream transmission streams that need to be indicated by the SRI information can be divided into multiple quantitative intervals and indicated separately, that is, different numbers of activated codewords correspond to different corresponding relationships. The SRI information only needs to indicate the number of upstream transmission streams within one of the number ranges. This can reduce the overhead of SRI information, reduce the resources occupied by SRI, and improve the utilization of communication resources.

In the first aspect, a method for SRS transmission is provided. The execution subject of the method can be either a terminal device or a chip applied to the terminal device. The method includes: receiving sounding reference signal SRS resource indication information sent by a network device; receiving first modulation and coding indication information and second modulation and coding indication information sent by the network device; and according to the first modulation and coding indication information and the second modulation and coding indication. information to determine the number of activated codewords; based on the number of activated codewords, determine N SRS resources indicated by the SRS resource indication information, and each SRS resource corresponds to an uplink transmission stream.

The SRS transmission method provided in the first aspect uses modulation and coding information and SRI information corresponding to multiple codewords to jointly indicate to the terminal device the number of uplink transmission streams (that is, the number of SRS resources) and the precoding of each stream. The number of activated codewords is different (that is, the number of codewords that need to be transmitted is different), and the SRI information is interpreted in different ways. Divide the number of all possible upstream transmission streams that need to be indicated by the SRI information into multiple numerical intervals and indicate them separately, that is, different numbers of activated codewords correspond to different correspondences. The terminal device can determine the SRI information based on the different correspondences. The number of indicated SRS resources. The SRI information only needs to indicate the number of upstream transmission streams within one of the number ranges. This can reduce the overhead of SRI information, reduce the resources occupied by SRI, and improve the utilization of communication resources.

In a possible implementation of the first aspect, when both the first codeword and the second codeword are activated (that is, two codewords need to be transmitted), N is an integer greater than 4, that is, the uplink transport stream The number is greater than 4.

For example, the maximum number of upstream transmission streams supported by the terminal device may be greater than 4. For example, the maximum number of upstream transmission streams supported by the terminal device may be 8 streams, or the maximum number of upstream transmission streams supported by the terminal device may be greater than 8 streams, etc.

For example, it may be determined whether the first codeword is activated according to the MCS field and RV field included in the first modulation and coding indication information, and it may be determined whether the second codeword is activated according to the MCS field and RV field included in the second modulation and coding indication information. Activated.

For example, if the decimal value corresponding to the bit value in the MCS field in the first modulation and coding indication information is 26, and the decimal value corresponding to the bit value in the RV field is 1, it is determined that the first codeword is not activated.

For another example, if the decimal value corresponding to the bit value in the MCS field in the second modulation and coding indication information is not 26, and the decimal value corresponding to the bit value in the RV field is not 1, then it is determined that the second codeword is activated. .

In a possible implementation of the first aspect, the method further includes: determining identifiers corresponding to the N SRS resources according to a first correspondence relationship, where the first correspondence relationship is used to indicate: the number of bits in the SRS resource indication information. value, or the mapping relationship between the decimal value corresponding to the bit value in the SRS resource indication information and the corresponding identifiers of the N SRS resources.

In a possible implementation manner of the first aspect, when the maximum number of uplink transmission streams supported by the terminal device is 8, the length of the SRS resource indication information is 7 bits or 8 bits. The SRS resource indication information indicates the identifiers of 5 SRS resources, 6 SRS resources, 7 SRS resources or 8 SRS resources among the 8 SRS resources.

In a possible implementation of the first aspect, when one of the first codeword and the second codeword (for example, the first codeword or the second codeword) is activated (that is, one codeword needs to be transmitted) , N is an integer less than or equal to 4.

In a possible implementation of the first aspect, the method further includes: determining identifiers corresponding to the N SRS resources according to a second correspondence relationship, where the second correspondence relationship is used to indicate: bits in the SRS resource indication information The value of , or the mapping relationship between the decimal value corresponding to the bit value in the SRS resource indication information and the corresponding identifiers of the N SRS resources.

In a possible implementation manner of the first aspect, when the maximum number of uplink transmission streams supported by the terminal device is 8, the length of the SRS resource indication information is 8 bits. The SRS resource indication information indicates the identifier of one SRS resource, the identifiers of two SRS resources, the identifiers of three SRS resources, or the identifiers of four SRS resources among the eight SRS resources.

In a possible implementation of the first aspect, when one of the first codeword and the second codeword (for example, the first codeword or the second codeword) is activated, the method further includes: According to the third correspondence relationship, the identifiers corresponding to the N SRS resources are determined. The third correspondence relationship is used to indicate: the value of the bit on the first joint field, or the decimal value corresponding to the value of the bit on the first joint field. , the mapping relationship between the identifiers corresponding to the N SRS resources respectively; wherein, the first joint field is a field composed of bits in the SRS resource indication information and the second field, in the first codeword and the second codeword The modulation and coding indication information corresponding to the inactive codeword includes a second field.

For example, the first correspondence relationship and the second correspondence relationship, or the first correspondence relationship and the third correspondence relationship may be predefined or configured by signaling.

In a possible implementation manner of the first aspect, when the maximum number of uplink transmission streams supported by the terminal device is 8, the length of the SRS resource indication information is 7 bits. The first joint field indicates 1 SRS resource, 2 SRS resources, 3 SRS resources or 4 SRS resources among the 8 SRS resources. In this implementation, that is, when N is less than or equal to 4, some fields in the unactivated codeword and SRI information can be used to form a joint field, and the joint field can be used to indicate the SRS resource. In this way, the length of the SRI information can be further reduced, so that no matter whether the number of SRS resources indicated by the SRI information is greater than 4 or less than or equal to 4, the length of the SRI information is the same, thereby improving communication efficiency.

For example, the length of the second field is 1 bit.

In a possible implementation of the first aspect, the second field includes a new data indication NDI field included in the modulation and coding indication information corresponding to the inactive codeword.

In a possible implementation of the first aspect, the method further includes: determining the precoding used by each of the N uplink transmission streams according to the N SRS resources, wherein the first SRS resource and the first uplink transmission stream are Corresponding to the transport stream, the precoding used by the first uplink transport stream is the same as the precoding used by the first SRS resource, and the first SRS resource is one of N SRS resources.

In the second aspect, a method for SRS transmission is provided. The execution subject of the method can be either a network device or a chip applied to the network device. The method includes: determining N SRS resources; sending first modulation and coding indication information and second modulation and coding indication information to a terminal device; sending SRS resource indication information to the terminal device; wherein, the SRS resource indication information, the first modulation and coding indication information The indication information and the second modulation and coding indication information are jointly used to indicate N SRS resources.

The SRS transmission method provided in the second aspect uses modulation and coding information and SRI information corresponding to multiple codewords to jointly indicate to the terminal device the number of uplink transmission streams (that is, the number of SRS resources) and the precoding of each stream. The number of activated codewords is different, and the number of uplink transmission streams indicated by the SRI information belongs to different quantity intervals. In this way, all possible numbers of uplink transmission streams that need to be indicated by the SRI information can be divided into multiple quantity intervals for indication respectively. , that is, different numbers of activated codewords correspond to different corresponding relationships, and the terminal device can, according to different corresponding relationships, Determine the number of SRS resources indicated by the SRI information. The SRI information only needs to indicate the number of upstream transmission streams within one of the number ranges. This can reduce the overhead of SRI information, reduce the resources occupied by SRI, and improve the utilization of communication resources.

In a possible implementation of the second aspect, when both the first codeword and the second codeword are activated, N is an integer greater than 4.

In a possible implementation of the second aspect, the value of the bit in the SRS resource indication information, or the decimal value corresponding to the value of the bit in the SRS resource indication information, corresponds to the identifier of the N SRS resources respectively. There is a first correspondence between them.

In a possible implementation manner of the second aspect, when the maximum number of uplink transmission streams supported by the terminal device is 8, the length of the SRS resource indication information is 7 bits or 8 bits. The SRS resource indication information indicates 5 SRS resources, 6 SRS resources, 7 SRS resources or 8 SRS resources among the 8 SRS resources. The length of the SRS resource indication information is 7 bits or 8 bits.

In a possible implementation of the second aspect, when one of the first codeword and the second codeword (for example, the first codeword or the second codeword) is activated, N is less than or equal to an integer of 4.

In a possible implementation of the second aspect, the value of the bit in the SRS resource indication information, or the decimal value corresponding to the value of the bit in the SRS resource indication information, corresponds to the identifier of the N SRS resources respectively. There is a second corresponding relationship between them.

In a possible implementation manner of the second aspect, when the maximum number of uplink transmission streams supported by the terminal device is 8, the length of the SRS resource indication information is 8 bits. The SRS resource indication information indicates 1 SRS resource, 2 SRS resources, 3 SRS resources or 4 SRS resources among the 8 SRS resources.

In a possible implementation of the second aspect, the value of the bit on the first joint field, or the decimal value corresponding to the value of the bit on the first joint field, is between the corresponding identifiers of the N SRS resources. There is a third corresponding relationship; wherein the first joint field is a field composed of bits in the SRS resource indication information and a second field, and the modulation coding corresponding to the unactivated codeword in the first codeword and the second codeword The indication information includes a second field.

In a possible implementation manner of the second aspect, when the maximum number of uplink transmission streams supported by the terminal device is 8, the length of the SRS resource indication information is 7 bits. The first joint field indicates 1 SRS resource, 2 SRS resources, 3 SRS resources or 4 SRS resources among the 8 SRS resources. In this implementation, that is, when N is less than or equal to 4, some fields in the unactivated codeword and SRI information can be used to form a joint field, and the joint field can be used to indicate the SRS resource. In this way, the length of the SRI information can be further reduced, so that no matter whether the number of SRS resources indicated by the SRI information is greater than 4 or less than or equal to 4, the length of the SRI information is the same, thereby improving communication efficiency.

For example, the length of the second field is 1 bit.

In a possible implementation manner of the second aspect, the second field includes a new data indication NDI field included in the modulation and coding indication information corresponding to the inactive codeword.

In a possible implementation of the second aspect, both the first modulation and coding indication information and the first modulation and coding indication information include a modulation and coding strategy MCS field and a redundancy version RV field, and the MCS field and the redundancy version RV field are used To determine whether the first codeword or the second codeword is activated.

For example, the decimal value corresponding to the value of the bit in the MCS field in the first modulation and coding indication information is 26, and if the value of the bit in the RV field corresponds to a decimal value of 1, it is determined that the first codeword is not activated.

For another example, if the decimal value corresponding to the bit value in the MCS field in the second modulation and coding indication information is not 26, and the decimal value corresponding to the bit value in the RV field is not 1, then it is determined that the second codeword is activated. .

In the third aspect, a method for SRS transmission is provided. The execution subject of the method can be either a terminal device or a chip applied to the terminal device. The method includes: sending SRS to the network device respectively on M SRS resources. The M SRS resources have different numbers. The smaller the number of the SRS resource, the better the signal quality parameter of the SRS transmitted on the SRS resource, or the SRS The smaller the resource number, the worse the signal quality parameters of the SRS transmitted on the SRS resource; receive the SRS resource indication information sent by the network device; determine N SRS resources based on the SRS resource indication information, where N is an integer greater than 4, M is greater than or equal to N; according to the N SRS resources, the codeword corresponding to each of the N uplink transmission streams is determined, where each SRS resource corresponds to one uplink transmission stream.

In the SRS transmission method provided in the third aspect, when the terminal device sends multiple SRSs to the network device, the identifiers (numbers) of SRS resources corresponding to different SRSs are different. The larger the number of the SRS resource, the better the signal quality parameter of the SRS transmitted on the SRS resource. Alternatively, the smaller the number of the SRS resource, the better the signal quality parameter of the SRS transmitted on the SRS resource. After receiving the SRS, the network device indicates multiple SRS resources to the terminal device. The terminal device maps the upstream data streams corresponding to the multiple SRS resources to the corresponding codewords in order of the numbers of the multiple SRS resources from small to large or from large to small, so that the difference between different transmission streams in each codeword is The difference in channel quality SNR is small, thereby improving codeword throughput and communication efficiency.

In this embodiment of the present application, the better the signal quality parameter of the SRS, the better the channel quality during the transmission of the SRS. The worse the signal quality parameter of the SRS is, the worse the channel quality is when the SRS is transmitted.

For example, in this embodiment of the present application, the signal quality parameters of the SRS may include: the received power RSRP of the SRS, the equivalent channel coefficient of the SRS, etc. For example: the larger the RSRP of the SRS, the better the signal quality parameters of the SRS, or the larger the value of the equivalent channel coefficient of the SRS, the better the signal quality parameters of the SRS.

For example, according to the order of the M SRS resource numbers from large to small or from small to large, the smaller the SRS resource number is, the better the coding quality is used for the SRS resource. That is, the smaller the SRS resource number is, the better the SRS resource number is. The better the quality of the precoding corresponding to the resource (used), the better the signal quality parameters of the SRS sent (or transmitted) on the SRS resource. Or, for SRS resources with larger SRS resource numbers, use precoding with better coding quality. That is, the smaller the SRS resource number, the worse the channel quality of the precoding corresponding to the SRS resource. On this SRS resource The worse the signal quality parameters of the sent (or transmitted) SRS.

In a possible implementation of the third aspect, determining the codeword corresponding to each of the N uplink transmission streams based on the N SRS resources includes: determining the N codewords based on the corresponding numbers of the N SRS resources. Codewords corresponding to the upstream transport streams.

In a possible implementation of the third aspect, the first codeword corresponds to L SRS resources, the second codeword corresponds to S SRS resources, the sum of L and S is N, and the L SRS resources respectively correspond to the numbers in The maximum value is less than the minimum value among the numbers corresponding to the S SRS resources, or the minimum value among the numbers corresponding to the L SRS resources is greater than the maximum value among the numbers corresponding to the S SRS resources.

In a possible implementation of the third aspect, the method further includes: sending the first codeword to the network device through the L uplink transmission streams corresponding to the L SRS resources, and sending the second codeword through the S S uplink transmission streams corresponding to the SRS resources are sent to the network device.

The fourth aspect provides a method for SRS transmission. The execution subject of the method can be either a network device or a chip applied to the network device. The method includes: receiving SRS respectively sent by the terminal device on M SRS resources. The M SRS resources have different numbers. The smaller the number of the SRS resource, the better the signal quality parameter of the SRS transmitted on the SRS resource, or, The smaller the number of the SRS resource, the worse the signal quality parameters of the SRS transmitted on the SRS resource; determine N SRS resources among the SRS resources corresponding to the M SRS, where N is an integer greater than 4; send to the terminal device SRS resource indication information. The SRS resource indication information is used to indicate N SRS resources; according to the N SRS resources, the codeword corresponding to each uplink transmission stream in the N uplink transmission streams is determined, where each SRS resource corresponds to an uplink transmission stream. transport stream.

In the SRS transmission method provided in the fourth aspect, when the network device receives the SRS in different SRS resources, the identifiers (numbers) of the SRS resources corresponding to the different SRS are different. The larger the number of the SRS resource, the better the signal quality parameter of the SRS transmitted on the SRS resource. Alternatively, the smaller the number of the SRS resource, the better the signal quality parameter of the SRS transmitted on the SRS resource. After receiving the SRS, the network device indicates multiple SRS resources to the terminal device. The network device maps the upstream data streams corresponding to the multiple SRS resources to the corresponding codewords in order of the numbers of the multiple SRS resources from small to large or from large to small, so that the difference between different transmission streams in each codeword is The difference in channel quality SNR is small, thereby improving codeword throughput and communication efficiency.

In a possible implementation of the fourth aspect, determining the codeword corresponding to each of the N uplink transmission streams based on the N SRS resources includes: determining the N codewords based on the corresponding numbers of the N SRS resources. Codewords corresponding to the upstream transport streams.

In a possible implementation of the fourth aspect, the first codeword corresponds to L SRS resources, the second codeword corresponds to S SRS resources, the sum of L and S is N, and the L SRS resources respectively correspond to the numbers in The maximum value is less than the minimum value among the numbers corresponding to the S SRS resources, or the minimum value among the numbers corresponding to the L SRS resources is greater than the maximum value among the numbers corresponding to the S SRS resources.

In a possible implementation of the fourth aspect, the method further includes: receiving the first codeword transmitted by the terminal device using the L uplink transport streams corresponding to the L SRS resources, and receiving the first codeword transmitted by the terminal device using the S SRS resources. The second codeword transmitted by the S uplink transport streams corresponding to the resource.

In a fifth aspect, a communication device is provided, which device includes: a unit for performing each step in the above first aspect or any possible implementation of the first aspect, or a unit for performing the above third aspect or the third aspect. A unit of individual steps in any possible implementation of an aspect.

In a sixth aspect, a communication device is provided, which device includes: a unit for performing each step in the above second aspect or any possible implementation of the second aspect, or a unit for performing the above fourth aspect or the fourth aspect. A unit of individual steps in any possible implementation of an aspect.

In a seventh aspect, a communication device is provided. The device includes at least one processor and a memory. The at least one processor is configured to perform: the method in the above first aspect or any possible implementation of the first aspect, or the above third aspect. Methods in any possible implementation of the three aspects or the third aspect.

In an eighth aspect, a communication device is provided. The device includes at least one processor and a memory. The at least one processor is configured to perform: the method in the above second aspect or any possible implementation of the second aspect, or the above third aspect. Methods in any possible implementation of the four or fourth aspects.

In a ninth aspect, a communication device is provided. The device includes at least one processor and an interface circuit. The at least one processor is configured to perform: the method in the above first aspect or any possible implementation of the first aspect, Or the method in the above third aspect or any possible implementation of the third aspect.

In a tenth aspect, a communication device is provided. The device includes at least one processor and an interface circuit. The at least one processor is configured to perform: the method in the above second aspect or any possible implementation of the second aspect, or the above A method in the fourth aspect or any possible implementation of the fourth aspect.

In an eleventh aspect, a terminal device is provided. The terminal device includes the communication device provided in the fifth aspect, or the terminal device includes the communication device provided in the seventh aspect, or the terminal device includes the ninth aspect. Communication devices provided.

In a twelfth aspect, a network device is provided. The network device includes the communication device provided in the sixth aspect, or the terminal device includes the communication device provided in the eighth aspect, or the terminal device includes the tenth aspect. Communication devices provided.

In a thirteenth aspect, a computer program product is provided. The computer program product includes a computer program. When executed by a processor, the computer program is used to perform the method of the first aspect or any possible implementation of the first aspect. , the method in the second aspect or any possible implementation of the second aspect, the method in the third aspect or any possible implementation of the third aspect, or the fourth aspect or any possible implementation of the fourth aspect Methods.

In a fourteenth aspect, a computer-readable storage medium is provided. A computer program is stored in the computer-readable storage medium. When the computer program is executed, it is used to execute the first aspect or any possible implementation of the first aspect. The method in the second aspect or any possible implementation of the second aspect, the method in the third aspect or any possible implementation of the third aspect, or the fourth aspect or any possible implementation of the fourth aspect Methods in the implementation.

In a fifteenth aspect, a communication system is provided, which includes the above-mentioned terminal equipment and network equipment.

In a sixteenth aspect, a chip is provided. The chip includes: a processor for calling and running a computer program from a memory, so that the communication device installed with the chip executes the first aspect or any possible method of the first aspect. The method in the implementation, the method in the second aspect or any possible implementation of the second aspect, the method in the third aspect or any possible implementation of the third aspect, or the fourth aspect or any of the fourth aspect Methods in possible implementations.

Description of the drawings

FIG. 1 is an architectural schematic diagram of a communication system suitable for embodiments of the present application.

FIG. 2 is a schematic interaction diagram of an example of an SRS transmission method provided by an embodiment of the present application.

FIG. 3 is a schematic interaction diagram of another example of an SRS transmission method provided by an embodiment of the present application.

FIG. 4 is a schematic block diagram of an example of a communication device provided by an embodiment of the present application.

FIG. 5 is a schematic block diagram of another communication device provided by an embodiment of the present application.

FIG. 6 is a schematic block diagram of another communication device provided by an embodiment of the present application.

FIG. 7 is a schematic block diagram of another communication device provided by an embodiment of the present application.

Figure 8 is a schematic block diagram of a terminal device provided by an embodiment of the present application.

Figure 9 is a schematic block diagram of a network device provided by an embodiment of the present application.

Detailed ways

The technical solutions in this application will be described below with reference to the accompanying drawings.

In the description of the embodiments of this application, unless otherwise stated, "/" means or, for example, A/B can mean A or B; "and/or" in this article is just a way to describe the association of related objects. Relationship means that three relationships can exist. For example, A and/or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "plurality" refers to two or more than two.

Hereinafter, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of this embodiment, unless otherwise specified, "plurality" means two or more.

The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (Code Division Multiple Access, CDMA) system, broadband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, fifth generation (5th Generation, 5G) systems, New Radio (NR) or other types of future communication systems, etc.

The terminal equipment in the embodiment of this application may refer to user equipment, access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent or User device. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), or a device with wireless communications Functional handheld devices, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in future 5G networks or future evolved Public Land Mobile Communications Networks (Public Land Mobile Network, PLMN) Terminal equipment, etc., the embodiments of this application are not limited to this.

The network device in the embodiment of the present application may be a device used to communicate with a terminal device. The network device may be a Global System of Mobile communication (GSM) system or a Code Division Multiple Access (CDMA) system. It can be a base station (Base Transceiver Station, BTS) in a wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system (NodeB, NB), or an evolutionary base station (Evolutional) in an LTE system. NodeB, eNB or eNodeB), or a wireless controller in a Cloud Radio Access Network (CRAN) scenario, or the network device can be a relay station, access point, vehicle-mounted device, wearable device, and in the future The embodiments of this application are not limited to network equipment in the 5G network, network equipment in the future evolved PLMN network, or network equipment in other types of future communication systems.

In this embodiment of the present application, the terminal device or network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. This hardware layer includes hardware such as central processing unit (CPU), memory management unit (MMU) and memory (also called main memory). The operating system can be any one or more types of services that are implemented through processes. The computer operating system processed, for example, Linux operating system, Unix operating system, Android operating system, iOS operating system or windows operating system, etc. This application layer includes applications such as browsers, address books, word processing software, and instant messaging software. Moreover, the embodiments of the present application do not specifically limit the specific structure of the execution subject of the method provided by the embodiment of the present application, as long as the program that records the code of the method provided by the embodiment of the present application can be run to provide according to the embodiment of the present application. For example, the execution subject of the method provided by the embodiment of the present application can be a terminal device or a network device, or a functional module in the terminal device or network device that can call a program and execute the program.

Additionally, various aspects or features of the present application may be implemented as methods, apparatus, or articles of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used in this application encompasses a computer program accessible from any computer-readable device, carrier or medium. For example, computer-readable media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks, tapes, etc.), optical disks (e.g., compact discs (CD), digital versatile discs (DVD)) etc.), smart cards and flash memory devices (e.g. erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.). Additionally, the various storage media described herein may represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing and/or carrying instructions and/or data.

The reference signal (RS), which can also be called a "pilot" signal, is a signal sent by the transmitting end device to the receiving end device for channel estimation or channel detection by the receiving end device. Reference signals are divided into uplink reference signals and downlink reference signals. The uplink reference signal refers to the signal sent by the terminal equipment to the network equipment (access network equipment), that is, the sending end is the terminal equipment and the receiving end is the network equipment. The uplink reference signal is mainly used for two purposes: uplink channel estimation (for coherent demodulation and detection of network equipment or for calculating precoding) and uplink channel quality measurement. The uplink reference signal includes SRS and demodulation reference signal (DMRS).

SRS can be used to estimate uplink channel quality and channel selection, calculate the signal to interference plus noise ratio (SINR) of the uplink channel, and can also be used to obtain the uplink channel coefficients. In a TDD scenario, due to the uplink channel It has reciprocity with the downlink channel, and SRS can also be used to obtain the downlink channel coefficients. The uplink channel/downlink channel coefficients estimated by the network equipment using SRS can be used to determine the precoding matrix of the uplink channel/downlink channel, thereby increasing the transmission rate of uplink transmission/downlink transmission and increasing system capacity.

When the system bandwidth is large, due to the limited transmit power of the terminal equipment, the terminal equipment is often unable to send a full-bandwidth SRS within one symbol. It is necessary to send SRS on multiple symbols through frequency hopping to obtain a full-bandwidth channel. information. Currently, the NR protocol already supports sending SRS using frequency hopping on multiple consecutive symbols.

In the existing protocol, four uses of SRS are defined, namely: antenna switching, codebook, non codebook, and beam management. Among them, non-codebook SRS (non codebook SRS) is used for non-codebook uplink transmission.

In non-codebook uplink transmission, the network device configures the terminal device with an SRS resource set whose usage is non-codebook. A terminal device will be configured with at most two SRS resource sets, corresponding to downlink control information (DCI) formats (format) 0_1 and 0_2 respectively. Each SRS resource set contains one or more SRS resources. Each SRS resource The source contains an SRS port. The terminal device sends SRS to the network device on the port corresponding to each SRS resource according to the SRS resources included in the SRS resource set configured by the network device. When a terminal device sends SRS to a network device, usually each SRS port uses a different precoder. The precoder used by each SRS port is determined by the terminal device based on the uplink channel information obtained from the channel state information reference signal (channel state information reference signal, CSI-RS).

When the network device schedules the terminal device for uplink transmission, the network device will select one or more SRSs from the multiple SRSs sent by the terminal device, and indicate it to the terminal device through the SRI information (or can also be called the SRI field) in the DCI. SRS resources corresponding to one or more selected SRSs. For example: when the network device uses DCI format 0_1 to schedule the terminal device for uplink transmission, the network device will select one or more SRS resources from the SRS resource set corresponding to DCI format 0_1 to indicate to the terminal device. When the network device uses DCI format 0_2 to schedule the terminal device for uplink transmission, it selects one or more SRS resources from the SRS resource set corresponding to DCI format 0_2 and indicates them to the terminal device. The terminal device determines the number of uplink transmission streams (or also called uplink data streams) to be transmitted on the PUSCH and the precoding of each stream according to the indicated SRS resources of the network device. That is to say, the network device uses SRI information to indicate to the terminal device the number of uplink transmission streams transmitted on PUSCH and the precoding of each stream. Among them, the number of uplink transmission streams is the number of SRS resources indicated by the network device to the terminal device, and the precoding of each stream is the precoding used to send the SRS resources indicated by the network device, that is, the terminal device sends SRS to the network device on the SRS resources. The precoding used.

For example, the network device configures four SRS resources for the terminal device, and the identities (IDs) of the four SRS resources are 0, 1, 2, and 3 respectively. The terminal device sends SRS to the network device respectively on the four SRS resources. During uplink scheduling, the network device determines two SRS resources from these four resources, with IDs 0 and 2 respectively, and indicates these two SRS resources to the terminal device through SRI information. In this case, the number of streams transmitted by the terminal device in the uplink is 2, and the precoding used by the first stream is the precoding corresponding to the SRS resource with ID 0, that is, the terminal device transmits data to the network device on the SRS resource with ID 0. The precoding used when sending SRS; the precoding used in the second stream is the precoding corresponding to the SRS resource with ID 2, that is, the precoding used by the terminal device when sending SRS to the network device on the SRS resource with ID 2.

In the existing standards, the maximum number of uplink transmission streams supported by terminal equipment is 4 streams. In non-codebook uplink transmission, the network equipment uses SRI information to indicate to the terminal equipment the uplink transmission stream transmitted on PUSCH. number and per-stream precoding. For example, the length of SRI information (that is, the number of bits of SRI information) can satisfy the following formula (1):

In formula (1), N _SRS represents the number of SRS resources in the SRS resource set whose purpose is non-codebook, and L _max represents the maximum number of uplink transmission streams supported by the terminal device. Indicates how many different ways to take (indicate) the total number of k SRS resources from N _SRS different SRS resources, that is, value.

For example, assume that when N _SRS =4 and L _max =2, the network device indicates 1 or 2 SRS resources from 4 different SRS resources, where the IDs of the 4 SRS resources are: 0, 1, and 2 respectively. , 3, a total of different combinations. At this time, the length of the SRI information is That is, the length of the SRI information is 4 bits. Among them, the IDs of the four SRS resources are: 0, 1, 2, and 3 respectively.

For example, Table 1 shows the mapping between the decimal value corresponding to the bit field (Bit field) of the SRI information in the above example (i.e. N _SRS =4, L _max =2) and one SRS resource and two SRS resources. Relationship (index relationship) table.

Table 1

In addition, when the number of upstream transmission streams of the terminal device is less than or equal to 4, the terminal device needs to use these upstream transmission streams (layers) to transmit a codeword (codeword). When the number of upstream transmission streams of the terminal device is greater than 4, the terminal device needs to use these upstream transmission streams (layers) to transmit two codewords. When the network device schedules the terminal device for uplink transmission, the network device will indicate to the terminal device the information related to each codeword (such as the modulation and coding method, etc.) through the modulation and coding information in the DCI (or it can also be called the modulation and coding indication field). ). For example, the modulation and coding information may include: modulation and coding scheme (MCS), new data indicator (new data indicator, NDI), redundancy version (redundancy version, RV), etc. That is to say, when the number of upstream transmission streams of the terminal device is greater than 4, there will be two sets of modulation coding indication fields in the DCI sent by the network device to the terminal device, corresponding to two codewords (codeword) respectively.

Table 2 shows an example of the mapping relationship between upstream transport streams and codewords.

Table 2

In the example shown in Table 2, different upstream transport streams correspond to different IDs. For example, if there is only one upstream transport stream, the ID of the upstream transport stream is 0; if there are two upstream transport streams, the IDs of the two upstream transport streams are 0 and 1 respectively; if there are five upstream transport streams, Then the IDs of these five upstream transport streams are 0, 1, 2, 3, and 4 respectively; if there are eight upstream transport streams, the IDs of these eight upstream transport streams are 0 to 7 respectively. That is, the encoding of multiple upstream transport streams The numbers are consecutive.

In the example shown in Table 2, different codewords correspond to different IDs. If multiple upstream transmission streams (less than or equal to 4) transmit a codeword, the ID of the codeword is 0; if multiple upstream transmission streams If a stream (more than 4) transmits two codewords, the IDs of these two codewords are 0 and 1 respectively.

In the example shown in Table 2, x ⁽⁰⁾ (i) represents the i-th modulation symbol corresponding to the upstream transport stream with ID 0, and x ⁽¹⁾ (i) represents the i-th modulation symbol corresponding to the upstream transport stream with ID 1. i modulation symbols, and so on. x ⁽⁷⁾ (i) represents the i-th modulation symbol corresponding to the upstream transport stream with ID 7. d ⁽⁰⁾ (i) represents the i-th modulation symbol corresponding to the codeword with ID 0, and d ⁽¹⁾ (i) represents the i-th modulation symbol corresponding to the codeword with ID 1.

For example, as shown in Table 2, if there are 5 upstream transport streams, the number of codewords is 2. Among them, the IDs of the five upstream transmission streams are 0, 1, 2, 3, and 4 respectively, and the IDs of the two codewords are 0 and 1 respectively. The specific mapping relationship between the five upstream transmission streams and the two codewords is:

x ⁽⁰⁾ (i) = d ⁽⁰⁾ (2i) means: assign the 2i-th modulation symbol after the codeword encoding modulation with ID 0 to the i-th modulation after encoding and modulation of the upstream transport stream with ID 0 symbol;

x ⁽¹⁾ (i)=d ⁽⁰⁾ (2i+1) means: assign the 2i+1th modulation symbol of the codeword code modulation with ID 0 to the upstream transport stream code modulation with ID 1. i-th modulation symbol;

x ⁽²⁾ (i)=d ⁽¹⁾ (3i) means: assign the 3i-th modulation symbol after the codeword code modulation with ID 1 to the 3i-th modulation after code modulation of the upstream transport stream with ID 2 symbol;

x ⁽³⁾ (i)=d ⁽¹⁾ (3i+1) means: assign the 3i+1th modulation symbol after the codeword encoding and modulation with ID 1 to the upstream transport stream encoding and modulation with ID 3. The 3i+1 modulation symbol;

x ⁽⁴⁾ (i)=d ⁽¹⁾ (3i+2) means: assign the 3i+2 modulation symbol of the codeword code modulation with ID 1 to the upstream transport stream code modulation with ID 4. The 3i+2nd modulation symbol.

It can be seen from Table 2: For 5 upstream transmission streams, the first two upstream transmission streams (IDs are 0 and 1 respectively) transmit the first codeword (the ID of the codeword is 0), and the last three The upstream transport stream (IDs are 2, 3, and 4 respectively) transmits the second codeword (the ID of the codeword is 1). Based on this correspondence, the terminal device can send the codeword with ID 0 to the network device through the two upstream transmission streams with IDs 0 and 1, and send the codeword with ID 1 through the two upstream transmission streams with IDs 2, 3, and 4 respectively. These three upstream transport streams are sent to network devices.

For 6 upstream transmission streams, the first three upstream transmission streams (IDs are 0, 1, and 2 respectively) transmit the first codeword (the ID of the codeword is 0); the last three upstream transmission streams (IDs are respectively 3, 4, 5) to transmit the second codeword (the ID of the codeword is 1). Based on this correspondence, the terminal device can send the codeword with ID 0 to the network device through the three upstream transmission streams with IDs 0, 1, and 2, and send the codeword with ID 1 through the three upstream transmission streams with IDs 3 and 4 respectively. , 5 These three upstream transport streams are sent to the network device.

For an upstream transport stream of 7 streams, the first three upstream transport streams (IDs are 0, 1, and 2 respectively) transmit the first codeword (the ID of the codeword is 0); the last four upstream transport streams (IDs are respectively 3, 4, 5, 6) to transmit the second codeword (the ID of the codeword is 1). Based on this correspondence, the terminal device can send the codeword with ID 0 to the network device through the three upstream transmission streams with IDs 0, 1, and 2, and send the codeword with ID 1 through the three upstream transmission streams with IDs 3 and 4 respectively. The four upstream transport streams , 5, and 6 are sent to the network device.

For an 8-stream upstream transport stream, the first 4 upstream transport streams (IDs are 0, 1, 2, and 3 respectively) transmit the first codeword (the ID of the codeword is 0); the last 4 upstream transport streams ( IDs are 4, 5, 6, and 7 respectively) transmit the second codeword (the ID of the codeword is 1). The terminal device can then pass the codeword with ID 0 through the codeword with ID 0 and ID respectively according to the corresponding relationship. The four upstream transmission streams 1, 2, and 3 are sent to the network device, and the codeword with ID 1 is sent to the network device through the four upstream transmission streams with IDs 4, 5, 6, and 7 respectively.

By using the correspondence relationship shown in Table 2, it is possible to determine the mapping relationship between the multiple upstream transmission streams and the two codewords that need to be transmitted when the number of upstream transmission streams of the terminal device is greater than 4, thereby using different The upstream transport stream transmits different codewords.

As the capabilities of terminal equipment improve, the maximum number of upstream transmission streams that the terminal equipment can support also increases. For example, when the number of transmitting antennas of the terminal equipment increases to 8 transmitting antennas and the maximum number of upstream transmission streams is 8 streams, then The network device can configure 8 SRS resources for the terminal device. Using the above SRS resource indication method will greatly increase the SRI field overhead.

For example, when the maximum number of uplink transmission streams supported by the terminal device is 4 streams, the network device can configure 4 SRS resources for the terminal device. The network device needs to configure at least 1 of these 4 SRS resources to the terminal through the SRI field, and at most 4, then the length of the SRI field is bits, the SRI field requires at least 4 bits. When the maximum number of upstream transmission streams supported by the terminal device is 8 streams, the network device can configure 8 SRS resources for the terminal device. The network device needs to configure at least 1 and up to 8 of these 8 SRS resources to the terminal through the SRI field. , then the length of the SRI field is bits, that is, the SRI field requires at least 8 bits. This will lead to a large overhead of SRI information, requiring more communication resources to send SRI, causing SRI to occupy more resources, resulting in a waste of communication resources.

In view of this, this application provides an SRS transmission method, which uses the modulation and coding information and SRI information corresponding to multiple codewords to jointly indicate to the terminal device the number of uplink transmission streams (that is, the number of SRS resources) and the number of each stream. precoded. The number of activated codewords is different, and the number of uplink transmission streams indicated by the SRI information belongs to different quantity intervals. In this way, all possible numbers of uplink transmission streams that need to be indicated by the SRI information can be divided into multiple quantity intervals for indication respectively. , that is, different numbers of activated codewords correspond to different corresponding relationships, and the terminal device can determine the number of SRS resources indicated by the SRI information according to the different corresponding relationships. The SRI information only needs to indicate the number of upstream transmission streams within one of the number ranges. This can reduce the overhead of SRI information, reduce the resources occupied by SRI, and improve the utilization of communication resources.

In order to facilitate understanding of the embodiments of the present application, the communication system applicable to the embodiments of the present application is briefly introduced with reference to FIG. 1 .

FIG. 1 is a schematic diagram of a communication system 100 suitable for the detection reference signal transmission method according to the embodiment of the present application. As shown in FIG. 1 , the communication system 100 includes three communication devices, for example, a network device 110 , a terminal device 121 and a terminal device 122 . Among them, the terminal device 121 and the terminal device 122 can transmit data through device to device (device to device, D2D) communication. The link between the terminal device and the terminal device may be called a side link. Data communication can be performed between the network device 110 and at least one of the terminal device 121 and the terminal device 122. For example, in the uplink transmission where the purpose of SRS is SRS non-codebook, when the network device schedules at least one of the terminal device 121 and the terminal device 122 for uplink transmission, the network device 110 can use the method provided by this application. The SRS transmission method sends SRI information to the terminal device, thereby indicating to the terminal device the number of uplink transmission streams transmitted on PUSCH and the precoding of each stream.

It should be understood that the communication system shown in Figure 1 can also include more network nodes, such as terminal devices or network devices. The network devices or terminal devices included in the communication system shown in Figure 1 can be various forms of networks mentioned above. equipment or terminal equipment. The embodiments of the present application are no longer shown one by one in the drawings.

The SRS transmission method provided by this application will be described in detail below with reference to Figure 2. Figure 2 is a schematic interaction diagram of an SRS transmission method 200 according to an embodiment of this application. This method 200 can be applied in the scenario shown in Figure 1. Of course also It can be applied in other communication scenarios, and the embodiments of this application are not limited here.

It should also be understood that in the embodiment of the present application, the terminal device and the network device are used as the execution subjects of the method as an example to illustrate the method. As an example and not a limitation, the execution subject of the execution method may also be a chip, chip system, or processor applied to terminal equipment and network equipment.

As shown in FIG. 2 , the method 200 shown in FIG. 2 may include S210 to S240. Each step in the method 200 is described in detail below with reference to FIG. 2 .

S210. The network device sends SRI information to the terminal device. The SRI information is used to indicate the number of uplink transmission streams of the terminal device and the precoding of each stream.

In some embodiments, in uplink transmission where the SRS is non-codebook, the network device can schedule the terminal device for uplink transmission through SRI information. The SRI information is used to indicate to the terminal device one or more SRS respectively. Corresponding SRS resources. That is to say, the network device can indicate to the terminal device the number of uplink transmission streams transmitted on the PUSCH and the precoding (Precoding) of each stream through the SRI information.

Among them, the number of uplink transmission streams is the number of SRS resources indicated by the network device to the terminal device, and the precoding of each stream is the precoding used to send the SRS resources indicated by the network device, that is, the terminal device sends SRS to the network device on the SRS resources. The precoding used.

For example, the SRI information may indicate the identifiers or numbers corresponding to multiple SRS resources, thereby indicating multiple uplink transmission streams to the terminal device. For another example, the network device may also indicate to the terminal device the precoding corresponding to each SRS resource, thereby indicating to the terminal device the precoding corresponding to each uplink transmission stream. This application is not limited here.

It should be understood that in the embodiment of the present application, precoding can be understood as (or can also be called) a precoding matrix. The purpose of precoding is to reduce the complexity of the receiving end equipment (such as network equipment) in eliminating inter-channel effects, while reducing system overhead and maximizing the system capacity of MIMO. For example, after the transmitting device (such as a terminal device) obtains the CSI-RS, it can determine the precoding matrix corresponding to each uplink transmission stream based on the determined CSI-RS. Afterwards, the power, rate and even the transmission direction of each uplink data stream can be optimized through the precoding matrix, and some or all interference between data streams can be eliminated in advance at the sending end device to obtain better performance. In other words, in the precoding system, the transmitting device can optimize the spatial characteristics of the transmitted signal according to the channel conditions, so that the spatial distribution characteristics of the transmitted signal match the channel conditions. Therefore, the algorithm of the receiving device can be effectively reduced. degree of dependence.

In this embodiment of the present application, before the network device sends the SRI information to the terminal device, the network device can determine the number of SRS resources that the SRI information needs to indicate, that is, the value of N, which is a positive integer.

For example: the network device can receive SRS sent separately by the terminal device on multiple SRS resources. Assume that the network device receives 8 SRSs sent by the terminal device on 8 SRS resources respectively, and the corresponding identifiers of these 8 SRS resources are different. The network device can determine N SRS resources corresponding to N SRSs with better SRS signal quality among the SRS resources corresponding to the eight SRSs. For example: the power of the SRS signal received by the network equipment is relatively large, or the signal to interference plus noise ratio (signal to interference plus noise ratio) of the SRS corresponding signal after multiple-input multiple-output (MIMO) equalization, SINR) is higher, the quality of the SRS signal is better. After the N SRS resources are determined, the N SRS resources are indicated to the terminal device through the SRI. The value of N can be a value from 1 to 8.

It should be understood that in this embodiment of the present application, the maximum number of upstream transmission streams supported by the terminal device may be greater than 4. For example, the maximum number of upstream transmission streams supported by the terminal device may be 8 streams, or the maximum number of upstream transmission streams supported by the terminal device may be The number of streams can be greater than 8 streams, etc. In the embodiment of this application, there is no limit on the maximum number of upstream transmission streams supported by the terminal device.

For example, assuming that the maximum number of upstream transmission streams supported by the terminal device is 8 streams, the network device can configure 8 different SRS resources for the terminal device, and the network device can indicate at least one of these 8 SRS resources to the terminal device through SRI information. .

S220: The network device sends the first modulation and coding indication information and the second modulation and coding indication information to the terminal device.

In the following example, the maximum number of upstream transmission streams supported by the terminal device is 8 streams, and these 8 upstream transmission streams transmit two codewords. However, this should not limit the embodiments of this application. In other embodiments of this application, the maximum number of upstream transmission streams supported by the terminal device can be greater than 8 streams, and the number of transmitted codewords can be greater than 2. The embodiments of the present application are not limited here.

It should be understood that in the embodiment of the present application, the above-mentioned SRI information, first modulation and coding indication information and second modulation and coding indication information can be sent to the terminal device through the same information, for example: through DCI, or through multiple The indication information is sent to the terminal respectively, and the embodiment of the present application is not limited here. For example, the SRI information can be sent to the terminal device through one signaling, and the first modulation and coding indication information and the second modulation and coding indication information can be sent to the terminal device through another signaling.

In some embodiments, since the maximum number of upstream transmission streams supported by the terminal device is greater than 4, the terminal device may need to use these upstream transmission streams to transmit two codewords. Therefore, the network device needs to send the configuration information corresponding to the two codewords to the terminal device. For example, the network device may indicate the modulation and coding method of the first codeword (or the first codeword) through the first modulation and coding indication information to the terminal device, and the terminal device may indicate the second codeword through the second modulation and coding indication information. The modulation coding method of the word (or can also be called the second codeword).

For example, in this embodiment of the present application, the ID of the first codeword (codeword) may be 0, and the ID of the second codeword (codeword) may be 1. It should be understood that in other embodiments of the present application, the ID of the first codeword (codeword) and the ID of the second codeword (codeword) can also be other values, which are not limited in the embodiments of the present application.

In some embodiments, the modulation and coding information corresponding to each codeword may include: MCS field, NDI field, RV field, etc.

It should be understood that in this embodiment of the present application, before the network device sends the SRI, the first modulation and coding indication information, and the second modulation and coding indication information to the terminal device, the network device can determine the specific number of SRS resources indicated by the SRI information, that is, N value, thereby determining that the value of N is less than or equal to 4.

If the value of N is less than or equal to 4, that is, the maximum number of upstream transmission streams of the terminal device is 4. In this case, these upstream transmission streams only need to transmit one codeword (that is, the activated codeword). Then the network device determines that it only needs to instruct the terminal device to activate one codeword (the first codeword or the second codeword is activated). The network device may send the configuration information of the activated codewords and the configuration information of the inactive codewords to the terminal device through the first modulation and coding indication information and the second modulation and coding indication information.

If the value of N is greater than 4, that is, the number of upstream transmission streams of the terminal device is greater than 4. In this case, these upstream transmission streams need to transmit two codewords. Then the network device determines that it needs to instruct the terminal device to activate two codewords (the first codeword and the second codeword are both activated), and combines the two codewords through the first modulation and coding indication information and the second modulation and coding indication information. The configuration information of the activated codeword is sent to the terminal device.

After receiving the first modulation and coding indication information and the second modulation and coding indication information, the terminal device can determine the modulation and coding method of the first codeword according to the first modulation and coding indication information, and determine the modulation and coding method of the first codeword according to the second modulation and coding indication information. Modulation coding method of two codewords.

S230: After receiving the first modulation and coding indication information and the second modulation and coding indication information, the terminal device determines the number of activated codewords based on the first modulation and coding indication information and the second modulation and coding indication information.

It should be understood that in the embodiment of the present application, when a certain (or several) codeword is activated, the terminal device needs to transmit this (or several) codeword, that is, the terminal device needs to use one or more uplink The transport stream transmits this (or several) activated codewords. If a certain codeword is not activated, the terminal device does not need to transmit this codeword. In other words, the number of activated codewords is the same as the number of codewords that need to be transmitted.

For example, it can be seen from Table 2 that when a codeword is activated, the terminal device needs to use less than or equal to 4 upstream transport streams to transmit the activated codeword. When two codewords are activated, the terminal device needs to utilize more than 4 upstream transport streams to transmit the two activated codewords.

Optionally, in some embodiments, S230 may be replaced by the following step S230'.

S230': After receiving the first modulation and coding indication information and the second modulation and coding indication information, the terminal device determines the number of codewords to be transmitted based on the first modulation and coding indication information and the second modulation and coding indication information. The first modulation and coding indication information and the second modulation and coding indication information are associated with the number of codewords that need to be transmitted.

For example, in the embodiment of the present application, only one of the first codeword and the second codeword may be activated (that is, one codeword needs to be transmitted), or both the first codeword and the second codeword may be activated. (That is, two codewords need to be transmitted).

For example, the terminal device may determine whether the first codeword is activated based on the MCS field and RV field included in the first modulation and coding indication information, and determine the second codeword based on the MCS field and RV field included in the second modulation and coding indication information. Whether the word is activated. After determining the activated codeword, the codeword that needs to be transmitted can be determined. In other words, the first modulation and coding indication information and the second modulation and coding indication information are associated with the codeword (or activated codeword) that needs to be transmitted.

In some embodiments, if the decimal value corresponding to the bit value in the MCS field is 26, and the decimal value corresponding to the bit value in the RV field is 1, determine the modulation coding indication where the MCS field and the RV field are located. The codeword corresponding to the information is not activated.

For example, if the decimal value corresponding to the bit value in the MCS field in the first modulation and coding indication information is 26, and the decimal value corresponding to the bit value in the RV field is 1, then it is determined that the first codeword has not been activated. , that is, the terminal device does not need to transmit the first codeword.

For another example, if the decimal value corresponding to the bit value in the MCS field in the second modulation and coding indication information is not 26, and the decimal value corresponding to the bit value in the RV field is not 1, then it is determined that the second codeword is Activation, that is, the terminal device needs to transmit the second codeword.

It should be understood that in the embodiment of the present application, it can also be determined in other ways whether the first codeword and the second codeword are activated. The above-mentioned method of determining whether the codeword is activated is only exemplary and should not affect the implementation of the present application. Any restrictions arise.

S240: The terminal device determines N SRS resources indicated by the SRS resource indication information according to the number of activated codewords, where each SRS resource corresponds to an uplink transmission stream.

Optionally, in some embodiments, S240 may be replaced by the following step S240'.

S240': The terminal device determines N SRS resources indicated by the SRS resource indication information according to the number of codewords that need to be transmitted, where each SRS resource corresponds to an uplink transmission stream.

In other words, the method 200 provided by the embodiment of this application may include: S210, S220, S230' and S240'.

In some embodiments, the terminal device may, based on the number of activated codewords (or the number of codewords that need to be transmitted), Determine N SRS resources indicated by the SRS resource indication information. The N SRS resources indicated by the SRS resource indication information indicate that the number of uplink transmission streams of the terminal device is N. In this embodiment of the present application, the maximum number of upstream transmission streams supported by the terminal device is greater than 4, and the maximum number of upstream transmission streams supported by the terminal device is greater than or equal to N. The precoding of each stream among the N uplink transmission streams is the precoding used to send the SRS resource indicated by the network device, that is, the precoding used by the terminal device when sending SRS to the network device on the SRS resource.

For example, in some embodiments, if the terminal device determines that only one codeword is activated (the first codeword or the second codeword is activated), that is, one codeword needs to be transmitted, it can determine the N indicated by the SRI. The upstream transport stream only needs to transmit one codeword (that is, the activated codeword). It is further determined that the maximum number of upstream transport streams is 4, that is, the value of N is less than or equal to 4. For example, the value of N can be 1. , 2, 3 or 4.

In some embodiments, if the terminal device determines that both codewords are activated (the first codeword and the second codeword are both activated), that is, two codewords need to be transmitted, the N indicated by the SRI can be determined. Each uplink transmission stream needs to transmit two codewords. It is further determined that the number of uplink transmission streams is greater than 4, then N is greater than 4. For example, the value of N can be 5, 6, 7 or 8, etc.

That is to say, in this embodiment of the present application, after the terminal device determines the number of activated codewords (that is, the number of codewords that need to be transmitted), it can determine whether the number of SRS resources indicated by the SRI information is N less than or equal to 4, or greater than 4.

Optionally, in the embodiment of the present application, the above-mentioned S230 and S240, or the above-mentioned S230' and S240' can also be replaced by the following step S221.

S221: The terminal device determines N SRS resources indicated by the SRS resource indication information according to the first modulation and coding indication information and the second modulation and coding indication information, where each SRS resource corresponds to an uplink transmission stream.

In other words, the method 200 provided by the embodiment of this application may include: S210, S220 and S221.

The specific process of the terminal device determining the N SRS resources indicated by the SRI information according to the number of activated codewords (that is, the number of codewords that need to be transmitted) will be described in detail below.

In some embodiments, if the terminal device determines that N is greater than 4, that is, both codewords are activated and the number of upstream transmission streams of the terminal device is greater than 4, the terminal device can use the first parsing method to parse the SRI information. In other words, the number of activated codewords is two (that is, the first codeword and the second codeword are both activated) corresponding to the first corresponding relationship. The terminal device can determine the N SRS resources respectively according to the first corresponding relationship. corresponding identification. The first correspondence relationship is used to indicate: the mapping relationship between the value of the bit in the SRI information, or the decimal value corresponding to the value of the bit in the SRI information, and the identifiers corresponding to the N SRS resources.

For example, Table 3 shows an example of a way to parse SRI information (that is, a form of the first correspondence) when N is greater than 4. In the example shown in Table 3, it is assumed that: the terminal device supports The maximum number of uplink transmission streams is 8. The network device indicates to the terminal device 5 SRS resources, 6 SRS resources, 7 SRS resources or 8 SRS resources among the 8 SRS resources, and assumes that the identifiers of the 8 SRS resources are ( ID) are 0 to 7 respectively. The mapping relationship (index relationship) between the decimal value corresponding to the bit field of the SRI information and 5, 6, 7 or 8 SRS resources is as shown in Table 3.

table 3

As can be seen from Table 3, the maximum number of uplink transmission streams supported by the terminal device is 8. The network device uses SRI to indicate 5 SRS resources, 6 SRS resources, and 7 SRS resources among the 8 SRS resources to the terminal device. Or when there are 8 SRS resources, there are a total of 92 different combinations. In other words, the decimal value corresponding to the bit field of the SRI information requires at least 92 different values, and it can be determined that the SRI information requires 7 bits in length.

In some embodiments, after determining that both codewords are activated, the terminal device can use the mapping relationship shown in Table 3 to determine the specific number of N SRS resources indicated by the network device and the locations of these N SRS resources. One SRS resource is the identification of N SRS resources. For example, the terminal device can determine the identifiers of N SRS resources based on the decimal value corresponding to the bit field of the SRI information and combined with the mapping table.

It should be understood that the first correspondence may also include some rows in Table 3 instead of all rows. In other words, in the embodiment of the present application, the specific content included in the first correspondence relationship may be all or part of Table 3.

It should also be understood that Table 3 is only exemplary and should not place any restrictions on the mapping relationship between the bit field of the SRI information and the N SRS resources in the embodiment of the present application. In other embodiments of the present application, there can be other mapping relationships between the decimal value corresponding to the bit field of the SRI information and the identifiers of the N SRS resources, for example, the decimal value corresponding to the bit field of the SRI information. 1 corresponds to the five SRS resources identified as 0, 1, 2, 3, and 4, and the decimal value 0 corresponds to the five SRS resources identified as 0, 1, 2, 3, and 5. Another example: the decimal value 56 corresponds to the seven SRS resources identified as 0, 1, 2, 3, 4, 5, and 6, and the decimal value 84 corresponds to the six SRS resources identified as 0, 1, 2, 3, 4, and 5. SRS resources, etc. are not limited in this embodiment of the present application.

In other embodiments, the terminal device can also use the mapping relationship (index relationship) between the bit value in the bit field in the SRI information and 5, 6, 7 or 8 SRS resources to determine N The identifier of the SRS resource. For example, what is shown in Table 4 is when the network device indicates 5 SRS resources, 6 SRS resources, 7 SRS resources or 8 SRS resources out of 8 SRS resources to the terminal device through SRI information, that is, the case where N is greater than 4. Another way to parse the SRI information (that is, another form of the first correspondence) is to compare the value of the bit in the bit field in the SRI information with the 5, 6, 7 or 8 SRS resources. The mapping relationship (index relationship) is shown in Table 4.

Table 4

In some embodiments, after determining that both codewords are activated, the terminal device can use the mapping relationship shown in Table 4 to determine the specific number of N SRS resources indicated by the network device and the locations of these N SRS resources. One SRS resource is the identification of N SRS resources.

It should be understood that the first correspondence may also include some rows in Table 4 instead of all rows. In other words, in the embodiment of the present application, the specific content included in the first correspondence relationship may be all or part of Table 4.

It should also be understood that Table 4 is only exemplary and should not place any restrictions on the mapping relationship between the bit field of the SRI information and the N SRS resources in the embodiment of the present application. In other embodiments of the present application, the value of the bit in the bit field of the SRI information and the identifiers of the N SRS resources can also be other mapping relationships, for example, the value of the bit in the bit field of the SRI information " 0000001" corresponds to the five SRS resources identified as 0, 1, 2, 3, and 4. The value of the bit in the bit field "0000000" corresponds to the five SRS resources identified as 0, 1, 2, 3, and 5. etc., the embodiments of the present application are not limited here.

It should be understood that in addition to using the mapping relationship between the decimal value corresponding to the bit field of the SRI information and the N SRS resources, or using the mapping relationship between the bit value in the bit field of the SRI information and the N SRS resources , In other embodiments of the present application, the mapping relationship between the SRI information and the N SRS resources can also be other forms of mapping relationships, which are not limited in the embodiments of the present application.

As can be seen from Table 3 and Table 4, when the maximum number of uplink transmission streams supported by the terminal device is 8, and the number of SRS resources indicated by the SRI information is greater than 4, the SRI information requires at least 7 bits in length to indicate 5 SRS resources, 6 SRS resources, 7 SRS resources or 8 SRS resources among the 8 SRS resources. That is to say, in this case, the length of the SRI information needs to be at least 7 bits. For example: the length of SRI information can be 7 bits or 8 bits.

In some embodiments, if the terminal device determines that N is less than or equal to 4, that is, only one codeword is activated, the second parsing method can be used to parse the SRI information. In other words, the number of activated codewords is one (that is, either the first codeword or the second codeword is activated), which corresponds to the second correspondence relationship. The terminal device may determine the identifiers corresponding to the N SRS resources according to the second correspondence relationship. The second correspondence relationship is used to indicate: the mapping relationship between the value of the bit in the SRI information, or the decimal value corresponding to the value of the bit in the SRI information, and the corresponding identifiers of the N SRS resources.

For example, Table 5 shows an example of a way to parse SRI information (ie, a form of the second correspondence) when N is less than or equal to 4. In the example shown in Table 5, it is assumed that: the terminal device The maximum number of uplink transmission streams supported is 8. The network device indicates to the terminal device 1 SRS resource, 2 SRS resources, 3 SRS resources or 4 SRS resources among the 8 SRS resources, and it is assumed that the 8 SRS resources The identifications (IDs) are 0 to 7 respectively. The mapping relationship (index relationship) between the decimal value corresponding to the bit field of the SRI information and 1, 2, 3 or 4 SRS resources is as shown in Table 5.

table 5

As can be seen from Table 5, the maximum number of uplink transmission streams supported by the terminal device is 8. The network device uses SRI to indicate 1 SRS resource, 2 SRS resources, and 3 SRS resources among the 8 SRS resources to the terminal device. Or 4 SRS resources, there are 160 different combinations. In other words, the decimal value corresponding to the bit field of the SRI information requires at least 160 different values, and it can be determined that the SRI information requires 8 bits in length.

In some embodiments, after determining that only one codeword is activated, the terminal device can use the mapping relationship shown in Table 5 to determine the specific number of N SRS resources indicated by the network device and which of these N SRS resources are respectively. SRS resources, that is, identifying the N SRS resources. For example, the terminal device can determine the identifiers of N SRS resources based on the decimal value corresponding to the bit field of the SRI information and combined with the mapping table.

It should be understood that the second correspondence relationship may also include some rows in Table 5 instead of all rows. In other words, in the embodiment of the present application, the specific content included in the second correspondence relationship may be all or part of Table 5.

It should also be understood that Table 5 is only exemplary and should not place any restrictions on the mapping relationship between the bit field of the SRI information and the N SRS resources in the embodiment of the present application. In other embodiments of the present application, there can be other mapping relationships between the decimal value corresponding to the bit field of the SRI information and the identifiers of the N SRS resources, for example, the decimal value corresponding to the bit field of the SRI information. 1 corresponds to the SRS resource identified as 0, and the decimal value 0 corresponds to the SRS resource identified as 1. For another example: the decimal value 8 corresponds to the two SRS resources identified as 0 and 2, the decimal value 9 corresponds to the two SRS resources identified as 0 and 1, etc. The embodiments of the present application are not limited here.

In other embodiments, the terminal device can also use the mapping relationship (index relationship) between the bit value in the bit field in the SRI information and 1, 2, 3 or 4 SRS resources to determine N The identifier of the SRS resource. For example, what is shown in Table 6 is that the network device uses SRI to indicate 1 SRS resource, 2 SRS resources, 3 SRS resources or 4 SRS resources among the 8 SRS resources to the terminal device, that is, the case where N is less than or equal to 4. Another way to parse the SRI information (that is, another form of the second correspondence) is to compare the value of the bit in the bit field in the SRI information with 1, 2, 3 or 4 SRS resources. The mapping relationship (index relationship) is shown in Table 6.

Table 6

In some embodiments, after determining that only one codeword is activated, the terminal device can use the mapping relationship shown in Table 6 to determine the specific number of N SRS resources indicated by the network device and which of these N SRS resources are respectively. SRS resources, that is, identifying the N SRS resources.

It should be understood that the second correspondence relationship may also include some rows in Table 6 instead of all rows. In other words, in the embodiment of the present application, the specific content included in the second correspondence relationship may be all or part of Table 6.

It should also be understood that Table 6 is only exemplary and should not place any restrictions on the mapping relationship between the bit field of the SRI information and the N SRS resources in the embodiment of the present application. In other embodiments of the present application, the value of the bit in the bit field of the SRI information and the identifiers of the N SRS resources can also be other mapping relationships, for example, the value of the bit in the bit field of the SRI information " 00000010" corresponds to the SRS resource with the identifier 1, and the bit value "00000001" in the bit field corresponds to the SRS resource with the identifier 2, etc. The embodiments of the present application are not limited here.

As can be seen from Table 5 and Table 6, when the maximum number of uplink transmission streams supported by the terminal device is 8, and the number of SRS resources indicated by the SRI information is less than or equal to 4, the SRI information needs to be at least 8 bits in length. Indicates 1 SRS resource, 2 SRS resources, 3 SRS resources or 4 SRS resources among the 8 SRS resources. That is, in this case, the length of the SRI information needs to be at least 8 bits. For example: the length of SRI information can be 8 bits.

When the network device sends SRI, no matter whether the number of SRS resources indicated by the SRI information is greater than 4 or less than or equal to 4, the length of the SRI information should be the same. It can be seen from the above description that when the maximum number of uplink transmission streams supported by the terminal device is 8, for the number of SRS resources indicated by the SRI information to be greater than 4, the length of the SRI information needs to be at least 7 bits. The number of SRS resources is less than or equal to 4, and the length of SRI information requires at least 8 bits. In this case, the length of the SRI information requires at least 8 bits. For example, the length of the SRI information can be 8 bits, so that the number of SRS resources indicated by the SRI information is greater than 4, or less than or equal to 4.

In other embodiments of the present application, when the maximum number of upstream transmission streams supported by the terminal device is 8, and only one codeword is activated, the required minimum length of the SRI information (8 bits) is greater than two codes. Minimum length (7 bits) of SRI information required if all words are activated. Therefore, in order to further reduce the overhead of SRI information, when only one codeword is activated, that is, when the upstream transmission stream of the terminal device is less than or equal to 4, some fields in the unactivated codeword can be borrowed. And the SRI information includes fields that jointly indicate 1 SRS resource, 2 SRS resources, 3 SRS resources or 4 SRS resources among the 8 SRS resources. That is, when N is less than or equal to 4, some fields in the unactivated codeword and SRI information can be used to form a joint field, and the joint field can be used to indicate the SRS resource. In this way, the length of the SRI information can be further reduced, so that no matter whether the number of SRS resources indicated by the SRI information is greater than 4 or less than or equal to 4, the length of the SRI information is the same. In other words In other words, if only one codeword is activated, the terminal device can also use the third parsing method to parse the SRI information. That is, the number of activated codewords is one (either the first codeword or the second codeword is activated) corresponding to the third correspondence relationship, and the terminal device can determine the identifiers corresponding to the N SRS resources according to the third correspondence relationship. The third correspondence relationship is used to indicate: the mapping relationship between the value of the bit on the first joint field, or the decimal value corresponding to the value of the bit on the first joint field, and the corresponding identifiers of the N SRS resources. The first joint field includes bits in the SRI information and a second field, and the modulation and coding indication information corresponding to the unactivated codewords in the first codeword and the second codeword includes the second field.

For example: assuming that the maximum number of upstream transmission streams supported by the terminal device is 8, and only one codeword is activated, you can use the second field included in the modulation and coding indication information corresponding to the unactivated codeword and the SRI information included in the The fields jointly indicate 1 SRS resource, 2 SRS resources, 3 SRS resources or 4 SRS resources among the 8 SRS resources.

For example, when N is less than or equal to 4, 1 bit of the NDI field (ie, the second field) included in the modulation and coding indication information corresponding to the codeword that is not activated can be used, combined with 7 in the SRI information. bits, together form 8 bits (ie, the first joint field) to indicate 1 SRS resource, 2 SRS resources, 3 SRS resources or 4 SRS resources among the 8 SRS resources. In this way, the SRI information only needs to be 7 bits in length. That is, in this case, the length of the SRI information may be 7 bits. The overhead of SRI information can be reduced in one step. At the same time, it is ensured that no matter whether the number of SRS resources indicated by the SRI information is greater than 4, or less than or equal to 4, the length of the SRI information is 7 bits, and it can take into account that the number of SRS resources indicated by the SRI information is greater than 4, or less than or equal to 4. Case.

For example, the decimal value corresponding to the bit field in Table 5 may be the decimal value corresponding to the bit field (i.e., the first joint field) consisting of 1 bit in the NDI field and 7 bits in the SRI information (i.e., the other part of the third correspondence relationship). form). The bit values in Table 6 can be the bit values on the bit field (i.e., the first joint field) composed of 1 bit of the NDI field and 7 bits of the SRI information (i.e., another type of the third correspondence relationship). form).

It should be understood that in the embodiment of the present application, the corresponding relationship shown in Table 5 and Table 6 can only be one of the second corresponding relationship and the third corresponding relationship, that is, the corresponding relationship shown in Table 5 and Table 6 is the third corresponding relationship. The second correspondence relationship or the third correspondence relationship, the second correspondence relationship and the third correspondence relationship cannot exist at the same time. The terminal device may determine the SRS resource indicated by the SRI information according to the second correspondence relationship or the third correspondence relationship.

In the embodiment of the present application, when only one codeword is activated, the bit field included in the SRI information and the bit field in the codeword that is not activated are used to jointly indicate the number of uplink transmission streams of the terminal device and the number of each stream. Precoding can further reduce the overhead of SRI information, and ensures that whether the number of SRS resources indicated by the SRI information is greater than 4 or less than or equal to 4, the length of the SRI information is the same, improving communication efficiency.

It should be understood that in this embodiment of the present application, in addition to the NDI field, other bit fields included in the modulation and coding indication information corresponding to the codeword that is not activated and the bit fields included in the SRI information can also be used to jointly indicate the uplink transmission of the terminal device. Number of streams and precoding per stream. The embodiments of the present application are not limited here.

In this embodiment of the present application, both the network device and the terminal device can store the mapping relationship (correspondence relationship) between the bit field of the SRI information and multiple SRS resources in advance. For example, both the network device and the terminal device can store the tables shown in Table 3 to Table 6. This can ensure that the SRS resources determined by the network device and the terminal device are the same, and avoid communication errors between the network device and the terminal device. This ensures communication efficiency between network equipment and terminal equipment.

After the terminal device determines the N SRS resources indicated by the SRI information, it can determine the uplink transmission of the terminal device. The number of streams is N. Further, after determining the respective identifiers of the N SRS resources, the precoding used by the uplink transmission stream corresponding to each SRS resource can be determined. For example: the first SRS resource among the N SRS resources corresponds to the first uplink transmission stream, then the precoding used by the first uplink transmission stream is the same as the precoding used by the first SRS resource, and the precoding used by the first SRS resource is The precoding used by the terminal device when sending SRS on the first SRS resource.

It should be understood that in this embodiment of the present application, the above-mentioned first correspondence relationship and second correspondence relationship, or first correspondence relationship and third correspondence relationship may be predefined or configured by signaling.

Predefined can be understood as defined by the protocol. Signaling configuration can be understood as configuration by high-layer or physical layer signaling. High-level signaling may include, for example, radio resource control signaling (radio resource control, RRC), medium access control (medium access control, MAC) control element (control element, CE), and radio link control (radio link control, RLC). Signaling etc. Physical layer signaling may include, for example, DCI, signaling transmitted through a downlink physical layer channel, etc. The physical downlink channel may be, for example, a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH). )wait.

In some embodiments, the expression of the above step S230 can be replaced with: S230a: After receiving the first modulation and coding indication information and the second modulation and coding indication information, the terminal device , determine the corresponding relationship. For example: the corresponding relationship may include the above-mentioned first corresponding relationship and the second corresponding relationship, or include the first corresponding relationship and the third corresponding relationship. The second correspondence relationship, the third correspondence relationship, and the first correspondence relationship are all used to determine the N SRS resources indicated by the SRS resource indication information. The expression of the above step S240 can also be replaced with: S240a: The terminal device determines the N SRS resources indicated by the SRS resource indication information according to the corresponding relationship. Among them, each SRS resource corresponds to an uplink transmission stream. That is to say, the method 200 provided by the embodiment of the present application may also include: S210, S220, S230a and S240a.

In some embodiments, S230a can be implemented in the following manner: the terminal device can determine the number of activated codewords according to the first modulation and coding indication information and the second modulation and coding indication information; according to the number of activated codewords, number to determine different corresponding relationships. For example: the terminal device can determine the number of activated codewords based on the values of the MCS field and RV field in the first modulation and coding indication information, and the value of the MCS field and RV field in the second modulation and coding indication information. . After determining the number of activated codewords, the corresponding relationship can be determined.

For example: if the number of activated codewords is two, then it is determined to use the first corresponding relationship to determine N SRS resources; if the number of activated codewords is one, then it is determined to use the second corresponding relationship or the third corresponding relationship to determine N SRS resources. For the specific description of S230a and S240a, please refer to the description of the corresponding parts in the above embodiment. For the sake of brevity, they will not be described again here.

In other embodiments, the expression of the above step S230 can be replaced with: S230b: The terminal device determines the corresponding relationship according to the values of the bits in the first modulation and coding indication information and the second modulation and coding indication information respectively. For example: the corresponding relationship may include the above-mentioned first corresponding relationship and the second corresponding relationship, or include the first corresponding relationship and the third corresponding relationship. The second correspondence relationship, the third correspondence relationship, and the first correspondence relationship are all used to determine the N SRS resources indicated by the SRS resource indication information. The expression of the above step S240 can also be replaced with: S240b: The terminal device determines the N SRS resources indicated by the SRS resource indication information according to the corresponding relationship. Among them, each SRS resource corresponds to an uplink transmission stream. That is to say, the method 200 provided by the embodiment of the present application may also include: S210, S220, S230b and S240b.

In some embodiments, S230b can be implemented in the following manner: the terminal device can respectively determine the values of the MCS field and RV field in the first modulation and coding indication information, and the MCS field in the second modulation and coding indication information. The value of the RV field determines the corresponding relationship.

For example: If the decimal values corresponding to the MCS field and RV field bits included in the first modulation and coding indication information are not 26 and 1 respectively, and the MCS field and RV field bits included in the second modulation and coding indication information are If the decimal values corresponding to the respective values are not 26 and 1, the first correspondence relationship is determined; if the decimal values corresponding to the bit values of the MCS field and RV field included in the first modulation and coding indication information are not 26 and 1 respectively. , and if the decimal values corresponding to the MCS field and RV field bit values included in the second modulation and coding indication information are 26 and 1 respectively, then the second corresponding relationship or the third corresponding relationship is determined.

For the specific description of S230b and S240b, please refer to the description of the corresponding parts in the above embodiment. For the sake of brevity, they will not be described again here.

The SRS transmission method provided by this application uses modulation and coding information and SRI information corresponding to multiple codewords to jointly indicate to the terminal device the number of uplink transmission streams (that is, the number of SRS resources) and the precoding of each stream. That is, the terminal can determine the number of uplink transmission streams according to the first modulation and coding indication information, the second modulation and coding indication information and the SRI information. Depending on the number of activated codewords, the SRI information is interpreted differently. Furthermore, when only one codeword is activated, the bit field in the unactivated codeword and the bit field included in the SRI information can also be used to jointly indicate the number of uplink transmission streams of the terminal device and the precoding of each stream. , further reduces the overhead of SRI information, improves the utilization of communication resources, and ensures that whether the number of SRS resources indicated by the SRI information is greater than 4 or less than or equal to 4, the length of the SRI information is the same, improving communication efficiency.

It can be seen from Table 2 that when the number of upstream transmission streams of the terminal device is greater than 4, the terminal device needs to use these upstream transmission streams to transmit two codewords. Before the terminal device transmits the uplink transport stream, the terminal device needs to precode each uplink transport stream. Different upstream transport streams use different precoders, and different precoders correspond to different encoding qualities. In other words, the precoding quality (or channel quality) corresponding to each uplink transport stream is different. The precoding used by a certain uplink transmission stream is the precoding used by the SRS resource of the uplink transmission stream, that is, the precoding used by the terminal device when sending SRS to the network device on the SRS resource.

For example, the network device indicates 5 SRS resources to the terminal device, and the numbers are 0, 2, 4, 5, and 7 respectively, that is, the number of upstream transmission streams of the terminal device is 5. Among these five SRS resources, the SRS resource numbered (identified) 2 corresponds to the best SRS signal quality parameters, and the SRS resource numbered 5 corresponds to the worst SRS signal quality parameters, that is, the precoding used by the SRS resource numbered 2 has the best coding quality, and the precoding used by the SRS resource numbered 5 has the worst coding quality. When the terminal device sends the uplink transport stream to the network device, the uplink transport stream corresponding to the SRS resource numbered 2 has the best channel quality (because the precoding used has the best coding quality), and the uplink transport stream corresponding to the SRS resource numbered 5 has the best channel quality. The transport stream has the worst channel quality (because the precoding used has the worst encoding quality).

The numbers of multiple SRS resources are also related to the numbers of multiple uplink transmission streams. For example, the network device indicates to the terminal device 5 SRS resources, numbered 0, 2, 4, 5, and 7 respectively. They are arranged in the order of SRS resource numbers from small to large or from small to large. The numbers of the 5 uplink transmission streams 0 to 4 respectively.

Among them, the SRS resource numbered 0 corresponds to the uplink transmission stream numbered 0, the SRS resource numbered 2 corresponds to the uplink transmission stream numbered 1, the SRS resource numbered 4 corresponds to the uplink transmission stream numbered 2, and the SRS resource numbered 5 The SRS resource corresponds to the uplink transmission stream numbered 3, and the SRS resource numbered 7 corresponds to the uplink transmission stream numbered 4.

Or, the SRS resource numbered 7 corresponds to the uplink transmission stream numbered 0, the SRS resource numbered 5 corresponds to the uplink transmission stream numbered 1, the SRS resource numbered 4 corresponds to the uplink transmission stream numbered 2, and the SRS resource numbered 2 corresponds to the uplink transmission stream numbered 2. The SRS resource corresponds to the uplink transmission stream numbered 3, and the SRS resource numbered 0 corresponds to the uplink transmission stream numbered 4.

That is to say, the numbers of the multiple uplink transmission streams are consecutively arranged in descending order or in ascending order according to the numbers of the multiple SRS resources.

As can be seen from Table 2, the mapping relationship between the upstream transport stream and the codeword is related to the number (identification) of the upstream transport stream, that is, in the order of the upstream transport stream number from small to large or from large to small, Map multiple upstream data streams to corresponding codewords.

For example: the network device indicates 5 SRS resources to the terminal device, and the numbers are 0, 2, 4, 5, and 7 respectively, that is, the number of upstream transmission streams of the terminal device is 5. For the five upstream transport streams, the IDs of the five upstream transport streams are 0 to 4 respectively. Assumption: SRS resource numbered 0 corresponds to uplink transmission stream numbered 0, SRS resource numbered 2 corresponds to uplink transmission stream numbered 1, SRS resource numbered 4 corresponds to uplink transmission stream numbered 2, numbered 5 The SRS resource corresponds to the uplink transmission stream numbered 3, and the SRS resource numbered 7 corresponds to the uplink transmission stream numbered 4.

Further, according to Table 2, it can be determined that the first two upstream transmission streams (IDs are 0 and 1 respectively) transmit the first codeword (the ID of the codeword is 0), and the last three upstream transmission streams (IDs are 2, 1, respectively). 3. 4) Transmit the second codeword (the ID of the codeword is 1). What may happen is that among these five upstream transport streams, the channels corresponding to the two transport streams numbered 0 and 3 have better quality, while the channels corresponding to the three transport streams numbered 1, 2, and 4 The quality is relatively poor. If according to the mapping relationship shown in Table 2, the transport streams numbered 0 and 1 transmit the first codeword (the ID of the codeword is 0), it will result in two corresponding There is a large difference in channel quality or signal-to-noise ratio (SNR) between transmission streams, that is, there is a large difference in channel quality or SNR between different transmission streams in the same codeword. . Similarly, the three transport streams numbered 2, 3, and 4 transmit the second codeword (the ID of the codeword is 0), which will also cause the difference in channel quality between different transport streams in the second codeword. Larger or larger SNR difference reduces codeword throughput, resulting in reduced communication efficiency.

In view of this, embodiments of the present application also provide an SRS transmission method. When the terminal device sends multiple SRSs to the network device, the identifiers (numbers) of the SRS resources corresponding to different SRSs are different. The larger the number of the SRS resource, the better the signal quality parameter of the SRS transmitted on the SRS resource. Alternatively, the smaller the number of the SRS resource, the better the signal quality parameter of the SRS transmitted on the SRS resource. After receiving the SRS, the network device indicates multiple SRS resources to the terminal device. The terminal equipment and the network equipment map the upstream data streams corresponding to the multiple SRS resources to the corresponding codewords in order of the numbers of the multiple SRS resources from small to large or from large to small, so that different transmissions in each codeword The difference in channel quality SNR between streams is small, thereby improving codeword throughput and communication efficiency.

The SRS transmission method provided by this application will be described in detail below with reference to Figure 3. Figure 3 is a schematic interaction diagram of an SRS transmission method 300 according to an embodiment of this application. This method 300 can be applied in the scenario shown in Figure 1, and of course also It can be applied in other communication scenarios, and the embodiments of this application are not limited here.

It should also be understood that in the example shown in FIG. 3 , the method is explained by taking the terminal device and the network device as the execution subjects of the method. As an example and not a limitation, the execution subject of the execution method may also be a chip, chip system, or processor applied to terminal equipment and network equipment.

As shown in FIG. 3 , the method 300 shown in FIG. 3 may include S310 to S340. Each step in the method 300 will be described in detail below with reference to Figure 3 .

S310. The terminal device sends SRS to the network device respectively on M SRS resources. The numbers of the M SRS resources are different. The smaller the number of the SRS resources, the better the signal quality parameters of the SRS transmitted on the SRS resources, or the better the SRS signal quality parameters of the SRS resources. The larger the number, the better the signal quality parameters of the SRS transmitted on the SRS resource.

In some embodiments, the network device configures multiple SRS resources with non-codebook usage for the terminal device, for example, M. The terminal device can send SRS to the network device on these M SRS resources respectively. In the embodiment of the present application, the value of M is greater than 4.

In this embodiment of the present application, the identifiers (numbers) of the M SRS resources are different. For example: the value of M can be 8, and the identifiers of the eight SRS resources can be 0 to 7 respectively.

When the terminal device sends SRS to the network device, the precoding used on each SRS resource is different. Since the precoding used for each SRS resource is determined by the terminal device, different precodings correspond to different encoding qualities. Before the terminal device sends the SRS, the SRS resource with the smaller number can be precoded with better coding quality according to the order of the M SRS resource numbers from large to small or from small to large. That is, the SRS resource with the smaller number is used. Small, the better the quality of the (used) precoding corresponding to the SRS resource, the better the signal quality parameters of the SRS sent (or transmitted) on the SRS resource. Or, for SRS resources with larger SRS resource numbers, use precoding with better coding quality. That is, the smaller the SRS resource number, the worse the channel quality of the precoding corresponding to the SRS resource. On this SRS resource The worse the signal quality parameters of the sent (or transmitted) SRS. After encoding different SRS resources using different precoders, SRS can be sent to the network device in different SRS resources respectively.

In this embodiment of the present application, the better the signal quality parameter of the SRS, the better the channel quality during the transmission of the SRS. The worse the signal quality parameter of the SRS is, the worse the channel quality is when the SRS is transmitted.

For example: in this embodiment of the present application, the signal quality parameters of the SRS may include: SRS received power (reference signal received power, RSRP), SRS equivalent channel coefficient, etc. For example: the larger the RSRP of the SRS, the better the signal quality parameters of the SRS, or the larger the value of the equivalent channel coefficient of the SRS, the better the signal quality parameters of the SRS.

For example: Assume that the terminal device sends 8 SRSs to the network device on 8 SRS resources. The identifiers of these 8 SRS resources are 0 to 7 respectively. The signal quality parameters of the SRS transmitted (sent) on these 8 SRS resources become better in descending order according to the number of the SRS resource. That is, the larger the number of the SRS resource, the better the signal quality of the SRS transmitted on the SRS resource. The better the quality parameters. For example: the RSRP of the SRS transmitted on the SRS resource numbered 3 is greater than the RSRP of the SRS transmitted on the SRS resource numbered 2; the RSRP of the SRS transmitted on the SRS resource numbered 6 is greater than the SRS transmitted on the SRS resource numbered 2 RSRP; the SRS transmitted on the SRS resource numbered 7 has the largest RSRP; the SRS transmitted on the SRS resource numbered 0 has the smallest RSRP.

Another example: Assume that the terminal device sends 8 SRSs to the network device on 8 SRS resources, and the identifiers of these 8 SRS resources are 0 to 7 respectively. The signal quality parameters of the SRS transmitted on these 8 SRS resources become worse in descending order according to the number of the SRS resources. That is, the smaller the number of the SRS resource, the worse the signal quality parameters of the SRS transmitted on the SRS resource. good. For example: the value of the equivalent channel coefficient of the SRS transmitted on the SRS resource numbered 3 is greater than the value of the equivalent channel coefficient of the SRS transmitted on the SRS resource numbered 4; the value of the SRS transmitted on the SRS resource numbered 2 is equal to The value of the effective channel coefficient is greater than the value of the equivalent channel coefficient of the SRS transmitted on the SRS resource numbered 3; the value of the equivalent channel coefficient of the SRS transmitted on the SRS resource numbered 0 is the largest; the SRS resource numbered 7 corresponds to The value of the equivalent channel coefficient of the SRS transmitted on is the smallest.

S320: After receiving the SRS resources respectively on the M SRS resources, the network device determines N SRS resources among the M SRS resources. N is an integer greater than 4, and M is greater than or equal to N.

In some embodiments, the network device may determine N SRS resources with better channel quality or better port quality among the SRS resources corresponding to the M SRSs respectively.

For example, assume that the network device receives 8 SRSs sent by the terminal device on 8 SRS resources respectively. These 8 The corresponding numbers of SRS resources are different. The network device can determine the N SRS resources corresponding to the N SRSs with better SRS signal quality among the SRS resources corresponding to the eight SRSs. For example: the SRS signal power received by the network device is larger, or the SRS corresponding signal passes through If the SINR after MIMO equalization is higher, the quality of the SRS signal is better.

S330. The network device sends SRI information to the terminal device. The SRI information is used to indicate N SRS resources. Each SRS resource corresponds to an uplink transmission stream. The number of uplink transmission streams of the terminal device is N.

In some embodiments, the network device may indicate to the terminal device the number of uplink transmission streams transmitted on PUSCH and the precoding of each stream through SRI information. Among them, the number of uplink transmission streams is the number of SRS resources indicated by the network device to the terminal device, and the precoding of each stream is the precoding used to send the SRS resources indicated by the network device, that is, the terminal device sends SRS to the network device on the SRS resources. The precoding used.

In this embodiment, the value of N is greater than 4, that is, the number of upstream transmission streams of the terminal device is greater than 4, and these upstream transmission streams need to transmit two codewords.

It should be understood that in this embodiment of the present application, the maximum number of upstream transmission streams supported by the terminal device is greater than N. For example, the maximum number of upstream transmission streams supported by the terminal device may be 8 streams, or the maximum number of upstream transmission streams supported by the terminal device may be greater than 8 streams, etc.

For example, assuming that the maximum number of upstream transmission streams supported by the terminal device is 8 streams, the value of N can be 5, 6, 7, or 8.

S340: The network device and the terminal device determine the codeword corresponding to each of the N uplink transmission streams based on the N SRS resources, where each SRS resource corresponds to one uplink transmission stream.

In this embodiment, the value of N is greater than 4, that is, the number of upstream transmission streams of the terminal device is greater than 4. The terminal device and the network device can determine that these N upstream transmission streams need to transmit two codewords.

As a possible implementation manner, the network device and the terminal device can determine the codewords corresponding to the N uplink transmission streams according to the numbers of the N SRS resources.

For example: Assume that the maximum number of upstream transmission streams supported by the terminal device is 8 streams, N equals 5, and the 5 SRS resource numbers are 0, 2, 4, 5, and 7 respectively, that is, the number of upstream transmission streams supported by the terminal device is 5 streams. It is assumed that the larger the number of the SRS resource, the better the signal quality parameters of the SRS transmitted on the SRS resource. Combined with what is shown in Table 2, the 5 upstream transmission streams correspond to two codewords. Among them, one codeword corresponds to 2 transmission streams and the other codeword corresponds to 3 transmission streams. Then the SRS resources numbered 0 and 2 can be used. The corresponding two transmission streams transmit one codeword (for example, the codeword identified as 0), and the three transmission streams corresponding to the SRS resources numbered 4, 5, and 7 are used to transmit another codeword (for example, the codeword identified as 1 ). Alternatively, you can also use two transmission streams corresponding to the SRS resources numbered 5 and 7 to transmit one codeword (for example, the codeword identified as 0), and use three transmission streams corresponding to the SRS resources numbered 0, 2, and 4. Transmit another codeword (for example, the codeword identified as 1). That is, terminal equipment and network equipment can map the upstream data streams corresponding to multiple SRS resources to the corresponding codewords in order of the SRS resource numbers from small to large or from large to small, thereby realizing different transmissions in each codeword. The difference in channel quality SNR between streams is small.

Optionally, as another possible implementation manner, the network device and the terminal device can also first determine the numbers of the five transport streams based on the numbers of the five SRS resources. For example, the numbers of the five uplink transmission streams can be obtained by sequentially arranging the numbers of the five SRS resources in descending order or in ascending order. Then, according to the numbers of the five transport streams, the five upstream data streams are mapped to the corresponding codewords in order of the numbers of the five transport streams from small to large or from large to small, thereby realizing different codewords in each codeword. The difference in channel quality SNR between transport streams is small.

For example: the SRS resource numbered 0 corresponds to the uplink transmission stream numbered 0, and the SRS resource numbered 2 corresponds to The uplink transmission stream numbered 1, the SRS resource numbered 4 corresponds to the uplink transmission stream numbered 2, the SRS resource numbered 5 corresponds to the uplink transmission stream numbered 3, the SRS resource numbered 7 corresponds to the uplink transmission stream numbered 4 transport stream. Or, the SRS resource numbered 7 corresponds to the uplink transmission stream numbered 0, the SRS resource numbered 5 corresponds to the uplink transmission stream numbered 1, the SRS resource numbered 4 corresponds to the uplink transmission stream numbered 2, and the SRS resource numbered 2 corresponds to the uplink transmission stream numbered 2. The SRS resource corresponds to the uplink transmission stream numbered 3, and the SRS resource numbered 0 corresponds to the uplink transmission stream numbered 4. That is, the IDs of the five upstream transport streams are 0 to 4 respectively. As shown in Table 2, the five upstream transport streams need to transmit two codewords, so the two transport streams numbered 0 and 1 can be used to transmit one codeword. (for example, the codeword identified as 0), and the three transport streams numbered 2, 3, and 4 are used to transmit another codeword (for example, the codeword identified as 1). Alternatively, two transport streams numbered 4 and 3 are used to transmit one codeword (for example, the codeword identified as 0), and three transport streams numbered 0, 1, and 2 are used to transmit another codeword (for example, the codeword identified as 1 code words). It can also be achieved that the channel quality SNR difference between different transmission streams in each codeword is small.

In other words, in the process of determining the codewords corresponding to the five upstream transmission streams, the first codeword (the codeword identified as 0) corresponds to 2 SRS resources, and the numbers of these two SRS resources are 0 and 2 respectively. . The second codeword (the codeword identified as 0) corresponds to three SRS resources, and the numbers of these three SRS resources are 4, 5, and 7 respectively. The maximum number of the SRS resource corresponding to the first codeword is 2, the minimum number of the SRS resource corresponding to the second codeword is 4, and the maximum number of the SRS resource corresponding to the first codeword is smaller than the second codeword The minimum number of the SRS resource corresponding to the word.

Or, in the process of determining the codewords corresponding to the five uplink transmission streams, the first codeword (the codeword identified as 0) corresponds to two SRS resources, and the numbers of the two SRS resources are 7 and 5 respectively. The second codeword (the codeword identified as 0) corresponds to three SRS resources, and the numbers of these three SRS resources are 0, 2, and 4 respectively. The minimum number of the SRS resource corresponding to the first codeword is 5, the maximum number of the SRS resource corresponding to the second codeword is 4, and the minimum number of the SRS resource corresponding to the first codeword is greater than the second codeword. The maximum number of the SRS resource corresponding to the word.

Through the above method, the codewords corresponding to the N uplink transmission streams can be determined.

Optionally, in this embodiment of the present application, the network device can also send the configuration information of the first codeword and the configuration information of the second codeword to the terminal device. For example, the network device may send first modulation and coding indication information and second modulation and coding indication information to the terminal device. The first modulation and coding indication information is used to indicate the modulation and coding method of the first codeword, and the second modulation and coding indication information is used to indicate the modulation and coding method of the first codeword. Indicates the modulation encoding method of the second codeword. The terminal device can obtain the configuration information of the first codeword and the configuration information of the second codeword based on the first modulation and coding indication information and the second modulation and coding indication information.

After determining the codewords corresponding to the N upstream transmission streams, as well as the configuration information of the first codeword and the configuration information of the second codeword, the terminal device can pass the first codeword through the corresponding multiple codewords. Send an uplink transmission stream to the network device, and send the second codeword to the network device through multiple uplink transmission streams corresponding to it. The network device can then receive the first codeword and the second codeword transmitted by the terminal device using multiple upstream transport streams respectively. This can make the difference in channel quality SNR between different transmission streams in each codeword smaller, improve the throughput of codewords, and improve communication efficiency.

For example, based on the above example, the terminal device can send the first codeword (codeword identified as 0) to the network device through the two transport streams corresponding to the SRS resources numbered 0 and 2, and send the second codeword to the network device. (Codeword identified as 1) is sent to the network device through three transport streams corresponding to SRS resources numbered 4, 5, and 7. Correspondingly, the network device can receive the first codeword transmitted by the terminal device using the two transport streams corresponding to the SRS resources numbered 0 and 2, and receive the three codewords transmitted by the terminal device using the SRS resources numbered 4, 5, and 7. The second codeword transmitted by the transport stream.

Optionally, in some embodiments, in S310, if the terminal device sends a request to the network on M SRS resources respectively Among the M SRSs sent by the device, there are multiple SRSs with the same signal quality (for example: the received power RSRP of the SRS is the same, or the equivalent channel coefficient value of the SRS is the same), that is, the numbers of the multiple SRS resources are different, but this The signal quality parameters of SRS transmitted on multiple SRS resources are the same. In this case, the numbers of the multiple SRS resources (the SRSs corresponding to the multiple SRS resources have the same signal quality) may be consecutive. Moreover, among the M SRS resources, for SRS resources other than these multiple SRS resources, the smaller the number of the SRS resource, the better the signal quality parameter of the SRS transmitted on the SRS resource, or the larger the number of the SRS resource. , the better the signal quality parameters of the SRS transmitted on the SRS resource.

For example: the terminal device sends 8 SRS to the network device on 8 SRS resources, and the numbers of these 8 SRS resources are 0 to 7 respectively. The signal quality parameters of the SRS transmitted on the SRS resources numbered 0 and 1 are the same. The signal quality parameters of the SRS transmitted on the SRS resources numbered 2 to 7 become worse in sequence as the SRS resource number becomes larger, and, no. The signal quality parameters of the SRS transmitted on SRS resources of 0 and 1 are the best.

Another example: the terminal device sends 8 SRSs to the network device on 8 SRS resources, and the numbers of these 8 SRS resources are 0 to 7 respectively. The signal quality parameters of the SRS transmitted on the SRS resources numbered 3 and 4 are the same. The signal quality parameters of the SRS transmitted on the SRS resources numbered 0 to 2 and 5 to 7 change sequentially as the SRS resource number becomes larger. good. Moreover, the signal quality parameters of the SRS transmitted on the SRS resources numbered 3 and 4 are better than the signal quality parameters of the SRS transmitted on the SRS resource numbered 2, and worse than the signal quality of the SRS transmitted on the SRS resource numbered 5. parameter.

In S320, among the N SRS resources determined by the network device, there may also be a situation where the numbers of the SRS resources are different, but the signal quality of the SRS transmitted on the different SRS resources is the same. In this case, in S340, the terminal device and the network device may also use the N SRS resources indicated by the SRI information in order of the SRS resource numbers from small to large or from large to small. The upstream data stream is mapped to the corresponding codeword. Multiple SRS resources with different numbers but the same signal quality of the SRS transmitted on the SRS resources can be mapped on the same codeword or on different codewords.

For example: the network device indicates 5 SRS resources to the terminal device through SRI information, numbered 0, 1, 2, 5, and 7 respectively. The signal quality parameters of the SRS transmitted on the SRS resources numbered 0 and 1 are the same, then it can Use two transmission streams corresponding to SRS resources numbered 0 and 1 to transmit one codeword (for example, the codeword identified as 0), and use three transmission streams corresponding to SRS resources numbered 2, 5, and 7 to transmit another code word (for example, the codeword identified as 1).

Another example: the network device indicates 5 SRS resources to the terminal device through SRI information, numbered 0, 2, 3, 5, and 7 respectively. The signal quality parameters of the SRS transmitted on the SRS resources numbered 2 and 3 are the same, then You can use two transport streams corresponding to SRS resources numbered 0 and 2 to transmit one codeword (for example, the codeword identified as 0), and use three transport streams corresponding to SRS resources numbered 3, 5, and 7 to transmit another codeword. Codeword (such as the codeword identified as 1).

In the SRS transmission method provided by the embodiment of the present application, when the terminal device sends multiple SRSs to the network device, the identifiers (numbers) of the SRS resources corresponding to different SRSs are different. The larger the number of the SRS resource, the better the signal quality of the SRS transmitted on the SRS resource. Alternatively, the smaller the number of the SRS resource, the better the signal quality of the SRS transmitted on the SRS resource. Terminal equipment and network equipment can map the upstream data streams corresponding to multiple SRS resources to corresponding codewords in order from small to large or from large to small in the order of the numbers of multiple SRS resources, so that each codeword has different The difference in channel quality SNR between transmission streams is small, thereby improving codeword throughput and communication efficiency.

It should be understood that the above is only to help those skilled in the art better understand the embodiments of the present application, but is not intended to limit the scope of the embodiments of the present application. Those skilled in the art can obviously make various equivalent modifications based on the above examples given. Modifications or changes, for example, some steps in the above method embodiments may be unnecessary, or some new steps may be added, etc. Or a combination of any two or more of the above embodiments. Such modified, changed or combined solutions also fall within the scope of the embodiments of the present application.

It should also be understood that the division of modes, situations, categories and embodiments in the embodiments of this application is only for the convenience of description and should not constitute a special limitation. The features in various modes, categories, situations and embodiments are not contradictory unless cases can be combined.

It should also be understood that the various numerical numbers involved in the embodiments of the present application are only for convenience of description and are not used to limit the scope of the embodiments of the present application. The size of the sequence numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its functions and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

It should also be understood that the above description of the embodiments of the present application focuses on emphasizing the differences between the various embodiments. The similarities or similarities that are not mentioned can be referred to each other. For the sake of brevity, they will not be described again here.

It should also be understood that in the embodiments of the present application, "predefinition" or "preset" can be realized by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in the device (for which this application specifically The implementation method is not limited.

The SRS transmission method according to the embodiment of the present application is described in detail above with reference to FIGS. 1 to 3 . Hereinafter, the communication device according to the embodiment of the present application will be described in detail with reference to FIGS. 4 to 9 .

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

It should be noted that the relevant content of each step involved in the above method embodiments can be quoted from the functional description of the corresponding functional module, and will not be described again here.

The terminal equipment and network equipment provided by the embodiments of the present application are used to perform any of the SRS transmission methods provided by the above method embodiments, and therefore can achieve the same effect as the above implementation method. In the case of using integrated units, the terminal device or network device may include a processing module, a storage module and a communication module. Among them, the processing module can be used to control and manage the actions of the terminal device or the network device. For example, it can be used to support a terminal device or a network device to perform steps performed by a processing unit. Storage modules can be used to support storage of program code and data, etc. The communication module can be used to support communication between terminal equipment or network equipment and other equipment.

The processing module may be a processor or a controller. It may implement or execute the various illustrative logical blocks, modules, and circuits described in connection with this disclosure. A processor can also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of digital signal processing (DSP) and a microprocessor, etc. The storage module may be a memory. The communication module can specifically be a radio frequency circuit, a Bluetooth chip, a Wi-Fi chip and other devices that interact with other electronic devices.

Exemplarily, FIG. 4 shows a schematic block diagram of a communication device 400 according to an embodiment of the present application. The communication device 400 may correspond to the terminal equipment described in the above methods 200 and 300, or may be a chip or chip applied to the terminal equipment. components, and each module or unit in the communication device 400 is used to perform each action or processing process performed by the terminal device in the above-mentioned method 200 or method 300.

As shown in FIG. 4 , the communication device 400 includes a transceiver unit 410 and a processing unit 420 . The transceiver unit 410 is used to Specific signal transmission and reception are performed under the driving of the processing unit 420.

In some embodiments:

The transceiver unit 410 is configured to receive the sounding reference signal SRS resource indication information sent by the network device.

The transceiver unit 410 is also configured to receive the first modulation and coding indication information and the second modulation and coding indication information sent by the network device, where the first modulation and coding indication information corresponds to the first code, and the second modulation and coding indication information corresponds to the second code.

The processing unit 420 is configured to determine the number of activated codewords (or the number of codewords that need to be transmitted) based on the first modulation and coding indication information and the second modulation and coding indication information.

The processing unit 420 is also configured to determine N SRS resources indicated by the SRS resource indication information according to the number of activated codewords (or the number of codewords that need to be transmitted), and each SRS resource corresponds to an uplink transmission stream.

Alternatively, the processing unit 420 is further configured to determine N SRS resources indicated by the SRS resource indication information according to the first modulation and coding indication information and the second modulation and coding indication information, and each SRS resource corresponds to an uplink transmission stream.

The communication device provided by this application jointly determines the number of uplink transmission streams (that is, the number of SRS resources) and the precoding of each stream by using the modulation and coding information and SRI information corresponding to the two codewords respectively. The number of activated codewords is different, the number of activated codewords is different, and the number of upstream transmission streams indicated by the SRI information belongs to different quantitative intervals, that is, the interpretation methods of the SRI information are different. In this way, the number of all possible upstream transmission streams that need to be indicated by the SRI information can be divided into multiple quantitative intervals and indicated separately. The SRI information only needs to indicate one of the quantitative intervals, which can reduce the overhead of SRI information and reduce the resources occupied by SRI. Improve the utilization of communication resources.

Optionally, in some possible implementations of this application, when both the first codeword and the second codeword are activated, N is an integer greater than 4.

Optionally, in some possible implementations of this application, the processing unit 420 is also configured to determine the identifiers corresponding to the N SRS resources according to the first correspondence relationship, where the first correspondence relationship is used to indicate: SRS resources The mapping relationship between the value of the bit in the indication information, or the decimal value corresponding to the value of the bit in the SRS resource indication information, and the corresponding identifiers of the N SRS resources.

Optionally, in some possible implementations of this application, the length of the SRS resource indication information is 7 bits or 8 bits.

Optionally, in some possible implementations of the present application, in the case where one of the first codeword and the second codeword (for example, the first codeword or the second codeword) is activated, N is less than Or an integer equal to 4.

Optionally, in some possible implementations of this application, the processing unit 420 is also configured to determine the identifiers corresponding to the N SRS resources according to the second correspondence relationship. The second correspondence relationship is used to indicate: SRS resource indication information. The mapping relationship between the value of the middle bit, or the decimal value corresponding to the value of the bit in the SRS resource indication information, and the corresponding identifiers of the N SRS resources.

Optionally, in some possible implementations of this application, the length of the SRS resource indication information is 8 bits.

Optionally, in some possible implementations of this application, the processing unit 420 is also configured to determine the identifiers corresponding to the N SRS resources according to a third correspondence relationship. The third correspondence relationship is used to indicate: the first joint field The mapping relationship between the value of the upper bit, or the decimal value corresponding to the value of the upper bit in the first joint field, and the corresponding identifiers of the N SRS resources; where the first joint field is the SRS resource indication information. A field composed of bits and a second field, the modulation coding indication information corresponding to the unactivated codeword in the first codeword and the second codeword includes Second field.

Optionally, in some possible implementations of this application, the length of the SRS resource indication information is 7 bits, and the length of the second field is 1 bit.

Optionally, in some possible implementations of this application, the second field includes a new data indication NDI field included in the modulation and coding indication information corresponding to the inactive codeword.

Optionally, in some possible implementations of this application, the processing unit 420 is also configured to perform the calculation according to the first modulation and coding indication information and the modulation and coding strategy MCS field and the redundancy version RV included in the first modulation and coding indication information. Field that determines whether the first codeword and the second codeword are activated.

Optionally, in some possible implementations of this application, the processing unit 420 is also configured to determine the precoding used by each of the N uplink transmission streams based on the N SRS resources, where the first SRS The resource corresponds to the first uplink transmission stream. The precoding used by the first uplink transmission stream is the same as the precoding used by the first SRS resource. The first SRS resource is one of N SRS resources.

In other embodiments:

The transceiver unit 410 is configured to send SRS to the network device respectively on M SRS resources. The M SRS resources have different numbers. The smaller the number of the SRS resources, the better the signal quality parameters of the SRS transmitted on the SRS resources, or the SRS The smaller the number of the resource, the worse the signal quality parameters of the SRS transmitted on the SRS resource.

The transceiver unit 410 is also configured to receive SRS resource indication information sent by the network device.

The processing unit 420 is configured to determine N SRS resources according to the SRS resource indication information, where N is an integer greater than 4, and M is greater than or equal to N.

The processing unit 420 is also configured to determine the codeword corresponding to each of the N uplink transmission streams based on the N SRS resources, where each SRS resource corresponds to one uplink transmission stream.

When the communication device provided by this application sends multiple SRSs to a network device, the identifiers (numbers) of SRS resources corresponding to different SRSs are different. The larger the number of the SRS resource, the better the signal quality parameter of the SRS transmitted on the SRS resource. Alternatively, the smaller the number of the SRS resource, the better the signal quality parameter of the SRS transmitted on the SRS resource. After receiving the SRS resources indicated by the SRI, the uplink data streams corresponding to the multiple SRS resources are mapped to the corresponding codewords in order of the SRS resource numbers from small to large or from large to small, so that each codeword The difference in channel quality SNR between different transmission streams is small, thereby improving codeword throughput and communication efficiency.

Optionally, in some possible implementations of this application, the processing unit 420 is also configured to determine the codewords corresponding to the N uplink transmission streams according to the corresponding numbers of the N SRS resources.

Optionally, in some possible implementations of this application, the first codeword corresponds to L SRS resources, the second codeword corresponds to S SRS resources, the sum of L and S is N, and the L SRS resources correspond to The maximum value of the numbers is less than the minimum value of the numbers corresponding to the S SRS resources, or the minimum value of the numbers corresponding to the L SRS resources is greater than the maximum value of the numbers corresponding to the S SRS resources.

Optionally, in some possible implementations of this application, the processing unit 420 is also configured to send the first codeword to the network device through L uplink transmission streams corresponding to the L SRS resources, and send the second codeword through S uplink transmission streams corresponding to S SRS resources are sent to the network device.

Furthermore, the communication device 400 can also be the storage unit, and the transceiver unit 410 can be a transceiver, an input/output interface or an interface circuit. The storage unit is used to store instructions executed by the transceiver unit 410 and the processing unit 420. The transceiver unit 410, the processing unit 420 and the storage unit are coupled to each other, the storage unit stores instructions, and the processing unit 420 is used to execute The instructions stored in the row storage unit are used by the transceiver unit 410 to perform specific signal transceiver driven by the processing unit 420.

It should be understood that for the specific process of each unit in the communication device 400 performing the above corresponding steps, please refer to the previous descriptions related to the terminal equipment in combination with the method 200, the method 300 and the related embodiments in Figures 2 and 3. For the sake of brevity, they will not be described again here. .

It should be understood that the transceiver unit 410 may be a transceiver, an input/output interface, or an interface circuit. The storage unit may be a memory. The processing unit 420 may be implemented by a processor. As shown in FIG. 5 , the communication device 500 may include a processor 510 , a memory 520 , a transceiver 530 and a bus system 540 . Various components of the communication device 500 are coupled together through a bus system 540, where in addition to a data bus, the bus system 540 may also include a power bus, a control bus, a status signal bus, etc. However, for the sake of clarity, the various buses are labeled bus system 540 in FIG. 5 . For convenience of presentation, it is only schematically drawn in Figure 5 .

The communication device 400 shown in FIG. 4 or the communication device 500 shown in FIG. 5 can implement the steps performed by the terminal device in each embodiment of the aforementioned method 200 or method 300. For similar descriptions, please refer to the descriptions in the corresponding methods mentioned above. To avoid repetition, they will not be repeated here.

It should also be understood that the communication device 400 shown in FIG. 4 or the communication device 500 shown in FIG. 5 may be a terminal device.

Figure 6 shows a schematic block diagram of a communication device 600 according to an embodiment of the present application. The communication device 600 may correspond to the network device described in the above method 200 or 300, or may be a chip or component applied to the network device, and, Each module or unit in the communication device 600 is used to perform each action or process performed by the network device in the above-mentioned method 200 or method 300.

As shown in FIG. 6 , the communication device 600 may include a processing unit 610 and a transceiver unit 620 . The transceiver unit 620 is used to perform specific signal transceiver driven by the processing unit 610 .

In some embodiments:

The processing unit 610 is used to determine N SRS resources.

The transceiver unit 620 is configured to send first modulation and coding indication information and second modulation and coding indication information to the terminal device. The first modulation and coding indication information is used to indicate the modulation and coding method of the first codeword, and the second modulation and coding indication information is used to indicate the modulation and coding method of the first codeword. Indicates the modulation coding method of the second codeword.

The transceiver unit 620 is also used to send SRS resource indication information to the terminal device. Wherein, the SRS resource indication information, the first modulation and coding indication information and the second modulation and coding indication information are jointly used to indicate the N SRS resources.

The communication device provided by this application uses the modulation and coding information and SRI information corresponding to the two codewords to jointly indicate to the terminal equipment the number of uplink transmission streams (that is, the number of SRS resources) and the precoding of each stream. The number of activated codewords is different, and the way of interpreting the SRI information is different. The number of upstream transmission streams indicated by the SRI information belongs to different quantitative intervals. In this way, all possible upstream transmission stream numbers that the SRI information needs to indicate can be divided into Multiple quantity intervals are indicated separately, and the SRI information only needs to indicate one of the quantity intervals. This can reduce the overhead of SRI information, reduce the resources occupied by SRI, and improve the utilization of communication resources.

In other embodiments:

The transceiver unit 620 is configured to receive SRS sent by the terminal device on M SRS resources respectively. The M SRS resources have different numbers. The smaller the number of the SRS resources, the better the signal quality parameters of the SRS transmitted on the SRS resources, or, The smaller the number of the SRS resource, the worse the signal quality parameters of the SRS transmitted on the SRS resource.

The processing unit 610 is configured to determine N SRS resources among the SRS resources respectively corresponding to the M SRSs, where N is an integer greater than 4.

The transceiver unit 620 is also configured to send SRS resource indication information to the terminal device, where the SRS resource indication information is used to indicate the N SRS resources.

The processing unit 610 is also configured to determine the codeword corresponding to each of the N uplink transmission streams based on the N SRS resources, where each SRS resource corresponds to one uplink transmission stream.

When the communication device provided by this application receives SRS sent by the terminal device using different SRS resources, the identifiers (numbers) of the SRS resources corresponding to the different SRS are different. The larger the number of the SRS resource, the better the signal quality of the SRS transmitted on the SRS resource. Alternatively, the smaller the number of the SRS resource, the better the signal quality of the SRS transmitted on the SRS resource. After indicating multiple SRS resources to the terminal, the uplink data streams corresponding to the multiple SRS resources are mapped to the corresponding codewords in order of the SRS resource numbers from small to large or from large to small, so that each codeword has different The difference in channel quality SNR between transmission streams is small, thereby improving codeword throughput and communication efficiency.

It should be understood that for the specific process of each unit in the communication device 600 performing the above corresponding steps, please refer to the previous descriptions related to the network equipment in combination with the relevant embodiments in the method 200 and the method 300. For the sake of brevity, no details will be described here.

Optionally, the transceiver unit 620 may include a receiving unit (module) and a sending unit (module), configured to perform the steps of the network device receiving information and sending information in various embodiments of method 200 or method 300.

Furthermore, the communication device 600 can also have the storage unit. The transceiver unit 620 may be a transceiver, an input/output interface, or an interface circuit. The storage unit is used to store instructions executed by the transceiver unit 620 and the processing unit 610. The transceiver unit 620, the processing unit 610 and the storage unit are coupled to each other. The storage unit stores instructions, the processing unit 610 is used to execute the instructions stored in the storage unit, and the transceiver unit 620 is used to perform specific signal transmission and reception under the driving of the processing unit 610.

It should be understood that the transceiver unit 620 may be a transceiver, an input/output interface, or an interface circuit. The storage unit may be a memory. The processing unit 610 may be implemented by a processor. As shown in FIG. 7 , the communication device 700 may include a processor 710 , a memory 720 and a transceiver 730 .

The communication device 600 shown in FIG. 6 or the communication device 700 shown in FIG. 7 can implement the steps performed by the network device in the embodiments of the aforementioned method 200 or method 300. For similar descriptions, please refer to the descriptions in the corresponding methods mentioned above. To avoid repetition, they will not be repeated here.

It should also be understood that the communication device 600 shown in FIG. 6 or the communication device 700 shown in FIG. 7 may be a network device.

It should also be understood that the division of units in the above device is only a division of logical functions. In actual implementation, they can be fully or partially integrated into a physical entity, or they can also be physically separated. And the units in the device can all be implemented in the form of software calling through processing components; they can also all be implemented in the form of hardware; some units can also be implemented in the form of software calling through processing components, and some units can be implemented in the form of hardware. For example, each unit can be a separate processing element, or it can be integrated and implemented in a certain chip of the device. In addition, it can also be stored in the memory in the form of a program, and a certain processing element of the device can call and execute the unit. Function. The processing element here can also be called a processor, and can be an integrated circuit with signal processing capabilities. During the implementation process, each step of the above method or each unit above can be implemented by an integrated logic circuit of hardware in the processor element or implemented in the form of software calling through the processing element.

In one example, the unit in any of the above devices may be one or more integrated circuits configured to implement the above method, such as: one or more application specific integrated circuits (ASICs), or one or Multiple digital signal processors (DSPs), or one or more field programmable gate arrays (FPGAs), or a combination of at least two of these integrated circuit forms. For another example, when a unit in the device can be implemented in the form of a processing element scheduler, the processing element can It is a general-purpose processor, such as a central processing unit (CPU) or other processor that can call programs. For another example, these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).

Figure 8 is a schematic structural diagram of a terminal device 800 provided by this application. The above-mentioned communication device 400 or communication device 500 may be configured in the terminal device 800. Alternatively, the communication device 400 or the communication device 500 itself may be the terminal device 800. In other words, the terminal device 800 can perform the actions performed by the terminal device in the above method 200 or method 300. Optionally, for convenience of explanation, FIG. 8 only shows the main components of the terminal device. As shown in FIG. 8 , the terminal device 800 includes a processor, a memory, a control circuit, an antenna, and an input and output device.

The processor is mainly used to process communication protocols and communication data, and to control the entire terminal device, execute software programs, and process data of the software programs. For example, it is used to support the terminal device to execute the above instruction method of the transmission precoding matrix in the embodiment. the action described. The memory is mainly used to store software programs and data, such as the codebook described in the above embodiment. The control circuit is mainly used for conversion of baseband signals and radio frequency signals and processing of radio frequency signals. The control circuit and the antenna together can also be called a transceiver, which is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users.

When the terminal device is turned on, the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and then sends the radio frequency signal out in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor. The processor converts the baseband signal into data and processes the data.

Those skilled in the art can understand that, for convenience of explanation, FIG. 8 only shows one memory and processor. In an actual terminal device, there may be multiple processors and memories. The memory may also be called a storage medium or a storage device, which is not limited in the embodiments of the present application.

For example, the processor may include a baseband processor and a central processing unit. The baseband processor is mainly used to process communication protocols and communication data. The central processing unit is mainly used to control the entire terminal device, execute software programs, and process software programs. data. The processor in Figure 8 integrates the functions of a baseband processor and a central processor. Those skilled in the art can understand that the baseband processor and the central processor can also be independent processors and are interconnected through technologies such as buses. Those skilled in the art can understand that the terminal device may include multiple baseband processors to adapt to different network standards, the terminal device may include multiple central processors to enhance its processing capabilities, and various components of the terminal device may be connected through various buses. The baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The function of processing communication protocols and communication data can be built into the processor, or can be stored in the storage unit in the form of a software program, and the processor executes the software program to implement the baseband processing function.

For example, in the embodiment of the present application, the antenna and the control circuit with the transceiver function can be regarded as the transceiver unit 801 of the terminal device 800 , and the processor with the processing function can be regarded as the processing unit 802 of the terminal device 800 . As shown in Figure 8, the terminal device 800 includes a transceiver unit 801 and a processing unit 802. The transceiver unit may also be called a transceiver, a transceiver, a transceiver device, etc. Optionally, the device used to implement the receiving function in the transceiver unit 801 can be regarded as a receiving unit, and the device used to implement the transmitting function in the transceiver unit 801 can be regarded as a sending unit, that is, the transceiving unit 801 includes a receiving unit. unit and sending unit. For example, the receiving unit may also be called a receiver, a receiver, a receiving circuit, etc., and the sending unit may be called a transmitter, a transmitter, a transmitting circuit, etc.

Figure 9 is a schematic structural diagram of a network device 900 provided by an embodiment of the present application, which can be used to implement the functions of the network device in the above method. The network device 900 includes one or more radio frequency units, such as a remote radio unit (RRU) 901 and one or more baseband units (BBU) (also called a digital unit, DU) 902. The RRU 901 may be called a transceiver unit, a transceiver, a transceiver circuit, a transceiver, etc., and may include at least one antenna 9011 and a radio frequency unit 9012. The RRU 901 part is mainly used for transmitting and receiving radio frequency signals and converting radio frequency signals and baseband signals, for example, for sending signaling messages in the above embodiment to terminal equipment. The BBU 902 part is mainly used for baseband processing, base station control, etc. The RRU 901 and the BBU 902 can be physically set together or physically separated, that is, a distributed base station.

The BBU 902 is the control center of the base station, which can also be called a processing unit. It is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, spread spectrum, etc. For example, the BBU (processing unit) 902 can be used to control the base station to execute the operation process related to the network equipment in the above method embodiment.

In one example, the BBU 902 can be composed of one or more single boards. Multiple single boards can jointly support a single access standard wireless access network (such as an LTE system or a 5G system), or can support different access networks respectively. standard wireless access network. The BBU 902 also includes a memory 9021 and a processor 9022. The memory 9021 is used to store necessary instructions and data. For example, the memory 9021 stores the codebook in the above embodiment, etc. The processor 9022 is used to control the base station to perform necessary actions, for example, to control the base station to perform the operation process of the network equipment in the above method embodiment. The memory 9021 and processor 9022 can serve one or more single boards. In other words, the memory and processor can be set independently on each board. It is also possible for multiple boards to share the same memory and processor. In addition, necessary circuits can also be installed on each board.

In a possible implementation, with the development of system-on-chip (SoC) technology, all or part of the functions of part 902 and part 901 can be implemented by SoC technology, for example, by a base station function chip Implementation, the base station function chip integrates processor, memory, antenna interface and other devices. The program of the base station related functions is stored in the memory, and the processor executes the program to realize the related functions of the base station. Optionally, the base station function chip can also read the memory external to the chip to implement related functions of the base station.

It should be understood that the structure of the network device illustrated in Figure 9 is only one possible form, and should not constitute any limitation on the embodiment of the present application. This application does not exclude the possibility of other forms of base station structures that may appear in the future.

It should be understood that in the embodiments of the present application, the processor may be a central processing unit (CPU). The processor may also be other general-purpose processors, digital signal processors (DSP), or dedicated integrated processors. Circuit (application specific integrated circuit, ASIC), off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

It should also be understood that the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (ROM), programmable ROM (PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically removable memory. Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. Volatile memory may be random access memory (RAM), which is used as an external cache. By way of illustration, but not limitation, many forms of random access memory (random access memory) Access memory (RAM) is available, such as static random access memory (static RAM, SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory Access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (direct rambus RAM, DR RAM).

The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any other combination. When implemented using software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on the computer, the processes or functions according to the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted over a wired connection from a website, computer, server, or data center (such as infrared, wireless, microwave, etc.) to another website, computer, server or data center. 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 or a data center that contains one or more sets of available media. The available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media. The semiconductor medium may be a solid state drive.

An embodiment of the present application also provides a communication system, which includes: the above-mentioned terminal device and the above-mentioned network device.

This embodiment of the present application also provides a computer-readable medium for storing computer program code. The computer program includes instructions for executing the SRS transmission method in the above-mentioned method 200 or method 300 according to the embodiment of the present application. The readable medium may be a read-only memory (ROM) or a random access memory (RAM), which is not limited in the embodiments of this application.

This application also provides a computer program product, which includes instructions that, when executed, cause the terminal device to perform terminal device operations corresponding to the above method, or to cause the network device to perform the terminal device operation corresponding to the above method. operation of network equipment.

An embodiment of the present application also provides a system chip. The system chip includes: a processing unit and a communication unit. The processing unit may be, for example, a processor. The communication unit may be, for example, an input/output interface, a pin, or a circuit. The processing unit can execute computer instructions to cause the chip in the communication device to execute any of the SRS transmission methods provided by the embodiments of the present application.

Optionally, any communication device provided in the above embodiments of the present application may include the system chip.

Optionally, the computer instructions are stored in a storage unit.

Optionally, the storage unit is a storage unit within the chip, such as a register, cache, etc. The storage unit may also be a storage unit located outside the chip within the terminal, such as a ROM or other storage unit that can store static information and instructions. Type of static storage device, RAM, etc. The processor mentioned in any of the above places may be a CPU, a microprocessor, an ASIC, or one or more integrated circuits for program execution that control the above-mentioned main system information transmission method. The processing unit and the storage unit can be decoupled, respectively installed on different physical devices, and connected through wired or wireless methods to realize the respective functions of the processing unit and the storage unit to support the system chip to implement the above embodiments. various functions in . Alternatively, the processing unit and the memory may be coupled on the same device.

It can be understood that the memory in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, non-volatile memory can be read-only memory (ROM), programmable ROM (PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically removable memory. Erase electrically programmable read-only memory (EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (RAM), which is used as an external cache. By way of illustration, but not limitation, many forms of random access memory (RAM) are available, such as static random access memory (static RAM (SRAM)), dynamic random access memory (DRAM), synchronous dynamic random access memory (RAM) Access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory access memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (direct rambus RAM, DR RAM).

The terms "system" and "network" are often used interchangeably herein. The term "and/or" in this article is just an association relationship that describes related objects, indicating that three relationships can exist. For example, A and/or B can mean: A exists alone, A and B exist simultaneously, and they exist alone. B these three situations. In addition, the character "/" in this article generally indicates that the related objects are an "or" relationship.

The terms "uplink" and "downlink" appearing in this application are used to describe the direction of data/information transmission in specific scenarios. For example, the "uplink" direction generally refers to the direction of data/information transmission from the terminal to the network side, or distribution The direction of transmission from the centralized unit to the centralized unit. The "downstream" direction generally refers to the direction of data/information transmission from the network side to the terminal, or the direction of transmission from the centralized unit to the distributed unit. It can be understood that "uplink" and "downlink" " is only used to describe the transmission direction of data/information, and the specific starting and ending equipment of the data/information transmission is not limited.

Various objects such as messages/information/equipment/network elements/systems/devices/actions/operations/processes/concepts that may appear in this application are named. It can be understood that these specific names are not It constitutes a limitation on the relevant objects. The assigned names can change according to the scene, context or usage habits and other factors. The technical meaning of the technical terms in this application should be understood mainly from the functions embodied/performed in the technical solution. and technical effects.

Those of ordinary skill in the art can appreciate that the methods in the embodiments of the present application can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are executed in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program or instructions may be stored in or transmitted over a computer-readable storage medium. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server that integrates one or more available media.

Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be described again here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or may be Integrated into another system, or some features can be ignored, or not implemented. Another point, shown Or the mutual coupling or direct coupling or communication connection discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application can be integrated into one processing unit, each unit can exist physically alone, or two or more units can be integrated into one unit.

If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), and random access.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application. should be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims (29)

1. A method for detecting reference signal transmission, characterized in that the method includes:

   Receive the sounding reference signal SRS resource indication information sent by the network device;

   Receive the first modulation and coding indication information and the second modulation and coding indication information sent by the network device;

   The number of activated codewords is determined according to the first modulation and coding indication information and the second modulation and coding indication information, the first modulation and coding indication information corresponds to the first codeword, and the second modulation and coding indication The information corresponds to the second codeword;

   According to the number of activated codewords, N SRS resources indicated by the SRS resource indication information are determined, and each SRS resource corresponds to an uplink transmission stream.
2. The method of claim 1, wherein N is an integer greater than 4 when both the first codeword and the second codeword are activated.
3. The method of claim 2, further comprising:

   According to the first correspondence relationship, the identifiers corresponding to the N SRS resources are determined. The first correspondence relationship is used to indicate: the value of the bit in the SRS resource indication information, or the bit value in the SRS resource indication information. The mapping relationship between the decimal value corresponding to the bit value and the corresponding identifiers of the N SRS resources.
4. The method according to claim 2 or 3, characterized in that the length of the SRS resource indication information is 7 bits or 8 bits.
5. The method according to claim 1, characterized in that, when one of the first codeword and the second codeword is activated, N is an integer less than or equal to 4.
6. The method of claim 5, further comprising:

   According to the second correspondence relationship, the identifiers corresponding to the N SRS resources are determined. The second correspondence relationship is used to indicate: the value of the bit in the SRS resource indication information, or the bit value in the SRS resource indication information. The mapping relationship between the decimal value corresponding to the bit value and the corresponding identifiers of the N SRS resources.
7. The method according to claim 6, characterized in that the length of the SRS resource indication information is 8 bits.
8. The method of claim 5, further comprising:

   According to the third correspondence relationship, the identifiers corresponding to the N SRS resources are determined. The third correspondence relationship is used to indicate: the value of the bit on the first joint field, or the value of the bit on the first joint field. The mapping relationship between the corresponding decimal value and the corresponding identifiers of the N SRS resources;

   Wherein, the first joint field is a field composed of bits in the SRS resource indication information and a second field, and the modulation corresponding to the unactivated codeword in the first codeword and the second codeword is The encoding indication information includes the second field.
9. The method according to claim 8, wherein the length of the SRS resource indication information is 7 bits, and the length of the second field is 1 bit.
10. The method according to claim 8 or 9, characterized in that the second field includes a new data indication NDI field included in the modulation and coding indication information corresponding to the inactive codeword.
11. The method according to any one of claims 1 to 8, characterized in that determining the number of activated codewords based on the first modulation and coding indication information and the second modulation and coding indication information includes:

    respectively according to the first modulation and coding indication information and the modulation included in the first modulation and coding indication information. The coding strategy MCS field and the redundancy version RV field determine whether the first codeword and the second codeword are activated.
12. The method according to any one of claims 1 to 11, characterized in that, the method further includes:

    According to the N SRS resources, determine the precoding used by each of the N uplink transmission streams, where the first SRS resource corresponds to the first uplink transmission stream, and the precoding used by the first uplink transmission stream The precoding used by the first SRS resource is the same, and the first SRS resource is one of the N SRS resources.
13. A method for detecting reference signal transmission, characterized in that the method includes:

    Determine N SRS resources;

    Send first modulation and coding indication information and second modulation and coding indication information to the terminal device, where the first modulation and coding indication information corresponds to the first codeword, and the second modulation and coding indication information corresponds to the second codeword;

    Send SRS resource indication information to the terminal device;

    Wherein, the SRS resource indication information, the first modulation and coding indication information and the second modulation and coding indication information are jointly used to indicate the N SRS resources.
14. The method of claim 13, wherein N is an integer greater than 4 when both the first codeword and the second codeword are activated.
15. The method according to claim 13, characterized in that the value of the bit in the SRS resource indication information, or the decimal value corresponding to the value of the bit in the SRS resource indication information, is the same as the value of the N SRS There is a first correspondence relationship between the identifiers corresponding to the resources.
16. The method according to claim 14 or 15, characterized in that the length of the SRS resource indication information is 7 bits or 8 bits.
17. The method of claim 13, wherein N is an integer less than or equal to 4 when one of the first codeword and the second codeword is activated.
18. The method according to claim 17, characterized in that the value of the bit in the SRS resource indication information, or the decimal value corresponding to the value of the bit in the SRS resource indication information, is the same as the value of the N SRS There is a second correspondence relationship between the identifiers corresponding to the resources.
19. The method according to claim 18, characterized in that the length of the SRS resource indication information is 8 bits.
20. The method according to claim 17, characterized in that the value of the bit on the first joint field, or the decimal value corresponding to the value of the bit on the first joint field, corresponds to the N SRS resources respectively. There is a third correspondence between the logos;

    Wherein, the first joint field is a field composed of bits in the SRS resource indication information and a second field, and the modulation corresponding to the unactivated codeword in the first codeword and the second codeword is The encoding indication information includes the second field.
21. The method according to claim 20, characterized in that the length of the SRS resource indication information is 7 bits, and the length of the second field is 1 bit.
22. The method according to claim 20 or 21, characterized in that the second field includes a new data indication NDI field included in the modulation and coding indication information corresponding to the inactive codeword.
23. The method according to any one of claims 13 to 20, characterized in that the first modulation coding Both the indication information and the first modulation and coding indication information include a modulation and coding strategy MCS field and a redundancy version RV field, and the MCS field and the redundancy version RV field are used to determine the first codeword or the second codeword. Whether the codeword is activated.
24. A communication device, characterized by comprising a unit for performing each step of the method as claimed in any one of claims 1 to 12, or 13 to 23.
25. A communication device, characterized by comprising at least one processor and an interface circuit, the at least one processor being configured to execute the method as claimed in any one of claims 1 to 12, or as claimed in any one of claims 13 to 23.
26. A terminal device, characterized by comprising the communication device according to claim 24 or 25.
27. A network device, characterized by comprising the communication device according to claim 24 or 25.
28. A computer-readable storage medium, characterized in that a computer program or instructions are stored in the computer-readable storage medium. When the computer reads and executes the computer program or instructions, the computer executes claims 1 to 12 The method described in any one of 13 to 23.
29. A chip, characterized in that it includes: a processor for calling and running a computer program from a memory, so that the communication device installed with the chip executes the method according to any one of claims 1 to 12, or The method described in any one of 13 to 23.