Communication method and device

Abstract

A communication method and apparatus, the method comprising: a terminal device determining one or more subcarrier sets and transmitting an SRS on the one or more subcarrier sets. The one or more subcarrier sets are determined from a first frequency domain resource by a first parameter p and a second parameter α, the first frequency domain resource being determined by the transmission bandwidth of the SRS, the number of subcarriers included in the first frequency domain resource being N, the N subcarriers included in the first frequency domain resource being equally spaced, the first parameter p being a prime number, and the second parameter α being the primitive root of the first parameter p. The above method can multiplex more ports on the same frequency domain resource.

Description

Technical Field

[0001] The present application relates to the field of wireless communications, and in particular to a communication method and device. Background Art

[0002] In long term evolution (LTE) and new radio access technology (NR), Multiple Input and Multiple Output (MIMO) technology is widely adopted. MIMO uses a multi-layer parallel transmission mode to provide a higher data transmission rate. The network equipment side can use the obtained downlink channel state information (CSI) to perform spatial precoding to improve the signal transmission quality or rate. For the time division duplexing (TDD) system, the uplink and downlink channels of the wireless channel are reciprocal. The network equipment receives the sounding reference signal (SRS) sent by the terminal equipment, performs channel estimation to obtain the uplink CSI, and then obtains the downlink CSI based on the uplink and downlink reciprocity.

[0003] The frequency domain resources used to transmit SRS are arranged in an equally spaced comb pattern, and the interval between the center frequencies of adjacent subcarriers is K. TC For example, the frequency domain resource is m SRS RBs are divided into K in the frequency domain. TC The number of subcarriers included in each group of frequency domain resources is in The number of subcarriers included in each RB. Figure 1 As shown, The subcarriers are Uniform sampling of subcarriers. Each set of frequency domain resources can be used to transmit an SRS. A terminal device can transmit an SRS on at least one of the above-mentioned sets of resources. Multiple terminal devices can transmit SRS on the same set of frequency domain resources using code division multiplexing. The index of the SRS signal can be a port, where multiple ports correspond to multiple transmit antennas from multiple terminal devices.

[0004] The number of subcarriers included in a set of frequency domain resources is For example, the maximum number of ports supported by a comb for code division multiplexing is The maximum delay extension of each port is L, and the unit is Where T sThe time of one OFDM symbol (excluding the cyclic prefix). Increasing the capacity of SRS can support more users and perform uplink channel measurements more timely. Summary of the Invention

[0005] The embodiments of the present application provide a communication method and apparatus for multiplexing SRS signals of multiple ports on the same frequency domain resources.

[0006] In a first aspect, an embodiment of the present application provides a communication method. Exemplarily, the execution subject of the method can be a terminal device or a chip in the terminal device. The method includes: determining one or more subcarrier sets, wherein the one or more subcarrier sets are determined from a first frequency domain resource by a first parameter p and a second parameter α, wherein the first frequency domain resource is determined by the transmission bandwidth of an SRS, the number of subcarriers included in the first frequency domain resource is N, and the N subcarriers included in the first frequency domain resource are equally spaced, the first parameter p is a prime number, and the second parameter α is the primitive root of the first parameter p; and transmitting the SRS on the one or more subcarrier sets.

[0007] Optionally, before sending the SRS, the terminal device determines the sequence of the SRS based on the number of subcarriers included in the first frequency domain resources, and maps the sequence of the SRS onto the first frequency domain resources.

[0008] Optionally, the N subcarriers included in the first frequency domain resources are continuous in the frequency domain, or the N subcarriers included in the first frequency domain resources are an equally spaced subcarrier group with an interval of 2 subcarriers, or the N subcarriers included in the first frequency domain resources are an equally spaced subcarrier group with an interval of 4 subcarriers, or the N subcarriers included in the first frequency domain resources are an equally spaced subcarrier group with an interval of 8 subcarriers.

[0009] Optionally, the value of the first parameter p is determined according to N.

[0010] Optionally, the value of the first parameter p is directly determined according to the number of subcarriers included in the transmission bandwidth of the SRS.

[0011] Optionally, the value of the second parameter α is determined according to the value of the first parameter p.

[0012] Using the above method, the terminal device sends SRS on one or more subcarrier sets, wherein the above one or more subcarrier sets are obtained by non-uniformly extracting subcarriers from the first frequency domain resources, thereby enabling multiplexing of more ports on the same frequency domain resources.

[0013] In one possible design, the one or more subcarrier sets are one or more of S candidate subcarrier sets, and any two subcarrier sets in the S candidate subcarrier sets respectively include different subcarriers; the rth candidate subcarrier set in the S candidate subcarrier sets includes a relative index set C r The subcarriers in the determined first frequency domain resource, S is a positive integer, r∈{0,…,S-1}, the relative index set C r for in, Or, the relative index set C r for The intersection of with the set {0,1,…,N-1}, where Operation log α (·) is: given any element x∈[1,p-1], log α (x)=y, y satisfies y∈[0,p-2], and α y mod p = integer of x.

[0014] Optionally, each configured SRS resource corresponds to one of S candidate subcarrier sets. The candidate subcarrier sets corresponding to different SRS resources may be the same or different.

[0015] By adopting the above design, the N subcarriers included in the first frequency domain resources can be divided into S candidate subcarrier sets. The subcarriers included in any one of the S candidate subcarrier sets are not equidistant in the frequency domain. Multiple SRS ports can be multiplexed on the same candidate subcarrier set by code division multiplexing, and different subcarrier sets can multiplex multiple SRS ports by frequency division multiplexing.

[0016] In one possible design, the relative index set C r The relative index is c r,n The SRS sequence elements on the subcarrier are d r,n =α r α Sn mod p, w = 1, or w = -1, Δ is a real number, m∈[1,p-1],l cs is a circular shift.

[0017] The SRS sequence elements designed above can approach the PAPR performance of the existing uniform comb pilot allocation scheme combined with the existing ZC sequence.

[0018] In one possible design, the one or more subcarrier sets are one or more of S candidate subcarrier sets, any two of the S candidate subcarrier sets do not have the same subcarrier, and the rth candidate subcarrier set in the S candidate subcarrier sets includes a relative index set C r The subcarriers in the determined first frequency domain resource, S is a positive integer, r∈{0,…,S-1}; the relative index set C r for in, Or, the relative index set C r for The intersection of with the set {0,1,…,N-1}, where

[0019] By adopting the above design, the N subcarriers included in the first frequency domain resources can be divided into S candidate subcarrier sets, and the subcarriers included in any two subcarrier sets in the S candidate subcarrier sets are different from each other, and the subcarriers included in any one of the S candidate subcarrier sets are not equidistant in the frequency domain. Multiple SRS ports can be multiplexed on the same candidate subcarrier set by code division multiplexing, and different subcarrier sets can multiplex multiple SRS ports by frequency division multiplexing.

[0020] In one possible design, the relative index set C r The relative index in is c r,n The SRS sequence elements on the subcarrier are Δ is a real number, l cs is a cyclic shift, w=1 or w=-1, or Δ is a real number, l cs is a cyclic shift, Or w=-1; calculate log α (·) is: given any element x∈[1,p-1], log α (x)=y, y satisfies y∈[0,p-2], and α y mod p = integer of x.

[0021] The SRS sequence elements designed above can approach the PAPR performance of the existing uniform comb pilot allocation scheme combined with the existing ZC sequence.

[0022] In one possible design, the rth candidate subcarrier set also includes the first frequency domain resources except the relative index set C r When at least one subcarrier other than the determined subcarrier is The at least one subcarrier and the relative index set The determined subcarriers in the first frequency domain resources do not overlap.

[0023] With the above design, any two subcarrier sets in the S candidate subcarrier sets include different subcarriers.

[0024] In one possible design, the relative index set C r The determined index value of the subcarrier in the first frequency domain resource in the system bandwidth is:

[0025]

[0026] Where, T is a positive integer, β∈{0,…,T-1}, It is the frequency domain shift value with subcarrier as the counting unit.

[0027] The above design can be used to determine the relative index set C r The determined index value of the subcarrier in the first frequency domain resource in the system bandwidth.

[0028] In one possible design, the first parameter p is a maximum prime number less than or equal to N+1; or, the first parameter p is a minimum prime number greater than or equal to N+1.

[0029] In one possible design, the value of the first parameter p is related to the number of subcarriers occupied by the first frequency domain resource or the number of subcarriers occupied by the SRS transmission bandwidth. Specifically, when the number of subcarriers occupied by the first frequency domain resource meets the first value range, the value of the first parameter p is a maximum prime number less than or equal to N+1; when the number of subcarriers occupied by the first frequency domain resource meets the second value range, the first parameter p is a minimum prime number greater than or equal to N+1.

[0030] In one possible design, the second parameter α is the maximum primitive root of the first parameter p; or, the second parameter α is the minimum primitive root of the first parameter p.

[0031] In one possible design, the value of the second parameter α is related to the value of the first parameter p. Specifically, when the first parameter p falls within a first value range, the second parameter α is the maximum primitive root of the first parameter p. When the first parameter p falls within a second value range, the second parameter α is the minimum primitive root of the first parameter p.

[0032] In one possible design, first information is received, where the first information is used to indicate a value of a configuration parameter, where the configuration parameter includes at least one of a first parameter p, a second parameter α, a parameter T, and a parameter β.

[0033] With the above design, the network device can configure the value of at least one of the above parameters for the terminal device through RRC signaling or MAC CE signaling.

[0034] In a second aspect, an embodiment of the present application provides a communication method. Exemplarily, the execution subject of the method can be a network device or a chip within the network device. The method includes: determining one or more subcarrier sets, wherein the one or more subcarrier sets are determined from a first frequency domain resource by a first parameter p and a second parameter α, wherein the first frequency domain resource is determined by the transmission bandwidth of a sounding reference signal SRS, wherein the number of subcarriers included in the first frequency domain resource is N, and the N subcarriers included in the first frequency domain resource are equally spaced, wherein the first parameter p is a prime number, and the second parameter α is the primitive root of the first parameter p; and receiving the SRS on the one or more subcarrier sets.

[0035] By adopting the above method, the network device can receive SRS on one or more subcarrier sets, wherein the above one or more subcarrier sets are obtained by non-uniformly extracting subcarriers from the first frequency domain resources, thereby enabling multiplexing of more ports on the same frequency domain resources.

[0036] In one possible design, the one or more subcarrier sets are one or more of S candidate subcarrier sets, and any two subcarrier sets in the S candidate subcarrier sets include different subcarriers.

[0037] The rth candidate subcarrier set in the S candidate subcarrier sets includes a relative index set C r The subcarriers in the determined first frequency domain resource, S is a positive integer, r∈{0,…,S-1},

[0038] The relative index set C r for in,

[0039] or,

[0040] The relative index set C r for The intersection of with the set {0,1,…,N-1}, where

[0041] Operation log α (·) is: given any element x∈[1,p-1], log α (x)=y, y satisfies y∈[0,p-2], and α y mod p = integer of x.

[0042] In one possible design, the relative index set C r The relative index is c r,n The SRS sequence elements on the subcarrier are d r,n =α r αSn mod p, w=1, or w=-1. Δ is a real number, m∈[1,p-1],l cs is a circular shift.

[0043] In one possible design, the one or more subcarrier sets are one or more of S candidate subcarrier sets, any two of the S candidate subcarrier sets do not have the same subcarrier, and the rth candidate subcarrier set in the S candidate subcarrier sets includes a relative index set C r The subcarriers in the determined first frequency domain resource, S is a positive integer, r∈{0,…,S-1};

[0044] The relative index set C r for in,

[0045] or,

[0046] The relative index set C r for The intersection of with the set {0,1,…,N-1}, where

[0047] In one possible design, the index set C r The relative index determined is c r,n The SRS sequence elements on the subcarrier are Δ is a real number, l cs is a cyclic shift, w=1 or w=-1, or

[0048] Δ is a real number, l cs is a cyclic shift, w=1 or w=-1;

[0049] Operation log α (·) is: given any element x∈[1,p-1], log α (x)=y, y satisfies y∈[0,p-2], and α y mod p = integer of x.

[0050] In one possible design, the rth candidate subcarrier set also includes the first frequency domain resources except the relative index set Cr When at least one subcarrier other than the determined subcarrier is The at least one subcarrier and the relative index set The determined subcarriers in the first frequency domain resources do not overlap.

[0051] In one possible design, the relative index set C r The determined index value of the subcarrier in the first frequency domain resource in the system bandwidth is:

[0052]

[0053] Where, T is a positive integer, β∈{0,…,T-1}, It is the frequency domain shift value with subcarrier as the counting unit.

[0054] In one possible design, the first parameter p is a maximum prime number less than or equal to N+1; or, the first parameter p is a minimum prime number greater than or equal to N+1.

[0055] In one possible design, the second parameter α is the maximum primitive root of the first parameter p; or, the second parameter α is the minimum primitive root of the first parameter p.

[0056] In one possible design, first information is sent, where the first information is used to indicate a value of a configuration parameter, where the configuration parameter includes at least one of a first parameter p, a second parameter α, a parameter T, and a parameter β.

[0057] In a third aspect, an embodiment of the present application provides a communication device, which includes a module for executing the first aspect and any possible design in the first aspect, or the device includes a module for executing the second aspect and any possible design in the second aspect.

[0058] In a fourth aspect, an embodiment of the present application provides a communication device, comprising a processor and an interface circuit, wherein the interface circuit is used to receive signals from other communication devices outside the communication device and transmit them to the processor or send signals from the processor to other communication devices outside the communication device, and the processor is used to implement the first aspect and any possible design of the first aspect through a logic circuit or executing code instructions, or the processor is used to implement the second aspect and any possible design of the second aspect through a logic circuit or executing code instructions.

[0059] In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium, in which a computer program or instruction is stored. When the computer program or instruction is executed by a communication device, the first aspect and any possible design in the first aspect, or the second aspect and any possible design in the second aspect are implemented.

[0060] In the seventh aspect, an embodiment of the present application provides a computer program product comprising a program, which, when running on a communication device, enables the communication device to execute the first aspect and any possible design of the first aspect or the second aspect and any possible design of the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 A schematic diagram of an equally spaced comb arrangement of frequency domain resources used for transmitting SRS in the background technology of this application;

[0062] Figure 2 A schematic diagram of a communication system used in embodiments of the present application;

[0063] Figure 3 This is a schematic diagram of the maximum number of orthogonal ports that a comb tooth can support in an embodiment of the present application;

[0064] Figure 4 This is a second schematic diagram of the maximum number of orthogonal ports that a comb tooth can support in an embodiment of the present application;

[0065] Figure 5 This is a flow chart summarizing a communication method in an embodiment of the present application;

[0066] Figure 6 This is a schematic diagram of coexistence of new users and old users in the same OFDM symbol in an embodiment of the present application;

[0067] Figure 7 This is one of the structural diagrams of a communication device in an embodiment of the present application;

[0068] Figure 8 This is the second structural diagram of a communication device in an embodiment of the present application. DETAILED DESCRIPTION

[0069] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0070] Figure 2 A schematic diagram of a communication system applicable to the embodiment of the present application is shown. Figure 2 As shown, the communication system 100 may include at least one network device, such as Figure 2 The network device 101 shown. The communication system 100 may also include at least one terminal device, such as Figure 2 Terminal devices 102 to 107 are shown. The terminal devices 102 to 107 may be mobile or fixed. Network device 101 and one or more of the terminal devices 102 to 107 may communicate via wireless links. Each network device may provide communication coverage for a specific geographic area and may communicate with terminal devices within that coverage area.

[0071] Optionally, terminal devices can communicate directly with each other. For example, direct communication between terminal devices can be achieved by using device to device (D2D) technology. Figure 2 As shown in FIG, terminal devices 105 and 106, and terminal devices 105 and 107 can directly communicate using D2D technology. Terminal device 106 and terminal device 107 can communicate with terminal device 105 individually or simultaneously.

[0072] The terminal devices 105 to 107 can also communicate with the network device 101 respectively. For example, they can communicate directly with the network device 101, such as Figure 2 The terminal devices 105 and 106 in the embodiment can communicate directly with the network device 101; or they can communicate indirectly with the network device 101, such as Figure 2 The terminal device 107 in the network communicates with the network device 101 via the terminal device 106.

[0073] It is understandable that Figure 2 This is just a schematic diagram. The communication system may also include other network devices, such as core network devices, wireless relay devices and wireless backhaul devices. Figure 2 In addition, the embodiments of the present application do not limit the number of network devices and terminal devices included in the communication system.

[0074] Among them, the terminal device is connected to the network device in a wireless manner, thereby accessing the mobile communication system. The network device can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next-generation NodeB (gNB) in a 5G mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, etc.; it can also be a module or unit that completes part of the functions of a base station, for example, a centralized unit (CU) or a distributed unit (DU). The embodiments of this application do not limit the specific technology and specific device form adopted by the network device.

[0075] Terminal devices may also be referred to as terminals, user equipment (UE), mobile stations, mobile terminals, etc. Terminal devices may be mobile phones, tablet computers, computers with wireless transceiver functions, virtual reality terminal devices, augmented reality terminal devices, wireless terminals used in industrial control, wireless terminals used in unmanned driving, wireless terminals used in remote surgery, wireless terminals used in smart grids, wireless terminals used in transportation safety, wireless terminals used in smart cities, wireless terminals used in smart homes, etc. The embodiments of this application do not limit the specific technologies and specific device forms used by the terminal devices.

[0076] The network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on the water; can also be deployed in the air on aircraft, balloons and artificial satellites. The embodiments of this application do not limit the application scenarios of the network equipment and terminal equipment.

[0077] Network devices and terminal devices can communicate through licensed spectrum, unlicensed spectrum, or both. Network devices and terminal devices can communicate through spectrum below 6 gigahertz (GHz), spectrum above 6 GHz, or spectrum below 6 GHz and spectrum above 6 GHz simultaneously. The embodiments of the present application do not limit the spectrum resources used between network devices and terminal devices.

[0078] In the embodiments of the present application, the time domain symbols may be orthogonal frequency division multiplexing (OFDM) symbols or discrete Fourier transform spread OFDM (DFT-s-OFDM) symbols. Unless otherwise specified, the symbols in the embodiments of the present application refer to time domain symbols.

[0079] In the embodiments of the present application, SRS is used as an example. SRS can also be replaced by a channel state information reference signal (CSI-RS), or a demodulation reference signal (DMRS), or a time domain / frequency domain / phase tracking reference signal, etc. Among them, CSI-RS can be used to obtain channel information and thus perform CSI measurement and reporting. DMRS can be used as a known signal for channel estimation when receiving a shared channel or a control channel.

[0080] The following describes the terms used in the present invention:

[0081] Sounding Reference Signal (SRS)

[0082] The UE generates and transmits an SRS on a specific physical resource based on a preset known sequence. The base station side estimates the channel matrix based on the received SRS on the specific physical resource based on the known sequence, and uses it for uplink data scheduling or downlink data scheduling using channel reciprocity. For example, the prior art uses a ZC sequence to generate the SRS. The SRS can be located on one or more OFDM symbols in a time slot, and can occupy all subcarriers in the system bandwidth, or it can occupy part of the subcarriers in the system bandwidth in a comb-tooth form, thereby improving network resource utilization.

[0083] SRS can be sent periodically in the time domain. A transmission period and offset are usually defined, and SRS is sent periodically at the periodic time domain location. SRS can also be sent aperiodically in the time domain. In this case, DCI signaling is required to indicate the SRS transmission time, and SRS is sent instantaneously at the periodic time domain location.

[0084] SRS resources define the time and frequency resources used to send SRS. Specifically, each SRS resource is configured with the following parameters:

[0085] SRS resource index value: When multiple SRS resources are configured, the SRS resources are distinguished by the index value.

[0086] Number of SRS ports: Typically, the number of SRS ports for a UE can be the same as the number of UE transmit antennas. In this case, each SRS port corresponds to a UE transmit antenna; each SRS port can correspond to a spatial precoding vector for the transmit antenna, that is, to a spatial beamforming method. Typically, the SRS signals of multiple SRS ports on an SRS resource occupy the same time-frequency resources and are multiplexed using code division. For example, the SRS signals of different SRS ports use different cyclic shifts (CS).

[0087] The time domain position occupied by SRS: that is, the configuration information of the time domain period or offset.

[0088] SRS transmission bandwidth.

[0089] CS value: The number of bits by which the sequence is cyclically shifted in the time domain. On the same time-frequency resource, when the SRS time-frequency resource consists of equally spaced subcarriers, different SRS signals from different SRS ports can be orthogonalized using code division multiplexing to avoid mutual interference. This orthogonality is achieved through cyclic shifting. When the channel delay spread is minimal, CS can essentially achieve code division orthogonality. The receiver can implement code division multiplexing by eliminating signals using other CSs and retaining only the signal using a specific CS through specific operations.

[0090] Transmit comb index T and comb shift β: These are used to determine the subcarrier positions occupied by the SRS within the transmit bandwidth. For example, a transmit comb index T indicates that one out of every two subcarriers within the transmit bandwidth is used to transmit the SRS, and the comb shift β can be configured to 0 or 1. A transmit comb index T of 4 indicates that one out of every four subcarriers within the transmit bandwidth is used to transmit the SRS, and the comb shift β can be configured to 0, 1, 2, or 3.

[0091] SRS sequence index value: Network equipment usually defines multiple SRS sequences and assigns each sequence to a different UE to reduce interference between multiple users.

[0092] Spatial filtering parameters: used to indicate the beamforming method.

[0093] SRS transmission bandwidth

[0094] The SRS transmission bandwidth refers to the SRS scanning (sounding) bandwidth, that is, the frequency domain range used for channel estimation based on the SRS. The channel corresponding to the transmission bandwidth can be estimated by using the subcarriers that carry the SRS. Only some subcarriers within the transmission bandwidth may carry the SRS, which is used to estimate the entire transmission bandwidth.

[0095] In one example, the network device can configure the transmission bandwidth of SRS for the terminal device. The terminal device determines the total number of subcarriers corresponding to the transmission bandwidth of SRS based on the transmission bandwidth of SRS. It can be understood that if the network device only configures the transmission bandwidth of SRS for the terminal device, the terminal device can determine that the subcarrier corresponding to the transmission bandwidth of SRS is the first frequency domain resource. At this time, the N subcarriers included in the first frequency domain resource are the subcarriers corresponding to the transmission bandwidth of SRS, and the N subcarriers are continuous subcarriers (which can also be described as N subcarriers with a subcarrier interval of 1). The value of N is equal to the total number of subcarriers corresponding to the transmission bandwidth of SRS.

[0096] For example, the transmission bandwidth of SRS includes m SRS RBs, the total number of subcarriers corresponding to the SRS transmission bandwidth is The number of subcarriers included in each RB, the terminal device determines

[0097] System bandwidth

[0098] Refers to the frequency domain range of signals sent and received when a base station and a terminal device communicate. The system bandwidth in the embodiments of the present application can be understood as a component carrier (CC) or a bandwidth part (BWP), where a CC can include multiple BWPs.

[0099] Relative index

[0100] In order to define the position of the subcarrier, the embodiment of the present application numbers the subcarriers, and subcarriers with different numbers correspond to different frequency domain positions. Generally, a group of subcarriers can be numbered consecutively from low to high or from high to low according to frequency. The subcarriers are numbered relative to a certain frequency domain range. For example, the index value of a certain subcarrier in the system bandwidth, or the numbering of the subcarrier relative to the system bandwidth, means that the subcarrier with the highest or lowest frequency in the system bandwidth is numbered as 0, and the subcarriers in the system bandwidth are numbered in order from high to low or from low to high in frequency, thereby determining the index value of a certain subcarrier in the system bandwidth. For another example, the relative index of the subcarrier in the embodiment of the present application means that the subcarrier with the highest or lowest frequency in the first frequency domain resource is numbered as 0, and the subcarriers in the first frequency domain resource are numbered in order from high to low or from low to high in frequency, thereby determining the index value of the subcarrier in the first frequency domain resource.

[0101] like subcarriers are not The uniform extraction of subcarriers is non-uniform extraction, so the maximum number of multiplexing ports is In order to achieve the multiplexing of more ports on the same frequency domain resources, a solution of determining the frequency domain resources for transmitting SRS by non-uniformly extracting subcarriers can be considered.

[0102] To include Taking the bandwidth of subcarriers as an example, the maximum number of ports that a subcarrier set can support is shown, such as Figure 3 The port multiplexing capability is determined by the properties of the partial DFT matrix corresponding to the set of frequency domain resources.

[0103] The transformation relationship between the frequency domain channel and the delay domain channel on the subcarrier is given by The DFT matrix Determine, based on the frequency domain channel, matrix Solve the delay domain channel.

[0104] Furthermore, if subcarriers are selected subcarriers, and hope to pass through the To solve the delay domain channel on the frequency domain channel of the subcarrier, it is necessary to determine the The partial DFT matrix F corresponding to the subcarriers.

[0105] Each subcarrier corresponds to the DFT matrix a line of The DFT matrix corresponding to the subcarrier of The rows constitute part of the DFT matrix F, and the nature of F determines the port multiplexing capability on subcarriers.

[0106] like subcarriers for a pair K subcarriers TC The comb teeth extract evenly, such as Figure 1 As shown, F is Each column of the matrix is considered as a length of The basis is divided into K TC Groups, each group includes Each group includes The bases are completely orthogonal, but corresponding columns in different groups are completely linearly correlated, for example, the first column of F1 is completely linearly correlated with the first column of F2, and the second column of F1 is completely linearly correlated with the second column of F2.

[0107] When multiplexing multiple ports, only basis available (since the other basis is linearly related to the basis in this group, i.e. mathematically indistinguishable). Assuming the maximum delay spread of each port is L, the maximum number of multiplexed ports is

[0108] Therefore, due to subcarriers for a pair K subcarriers TC The comb teeth are evenly extracted, resulting in only F substrates available.

[0109] like subcarriers are not The uniform extraction of subcarriers is non-uniform extraction, and the phenomenon of complete linear correlation between the corresponding columns of different groups mentioned above will not occur, that is, Columns Specifically, due to The length of the basis is That is, the number of bases is greater than Length, so The bases cannot be completely orthogonal, that is, a set of non-orthogonal bases, such as Figure 4 Assume that the maximum delay spread of each port is L, then the maximum number of multiplexed ports is Therefore, it is possible to multiplex SRS signals of more ports on the same frequency domain resources.

[0110] Based on this, an embodiment of the present application provides a communication method to achieve multiplexing of more ports on the same frequency domain resources.

[0111] like Figure 5 As shown, the method includes:

[0112] Step 500: The terminal device determines one or more subcarrier sets.

[0113] In which, the one or more subcarrier sets are determined from the first frequency domain resources by the first parameter p and the second parameter α, the first frequency domain resources are determined by the transmission bandwidth of the sounding reference signal SRS, the number of subcarriers included in the first frequency domain resources is N, the N subcarriers included in the first frequency domain resources are equally spaced, the first parameter p is a prime number, and the second parameter α is the primitive root of the first parameter p.

[0114] Among them, the second parameter α is the primitive root representation of the first parameter p. When n takes over {0,1,…,p-2}, α n mod p spans {1,…,p-1}.

[0115] The one or more subcarrier sets are used to carry the SRS. Determining the one or more subcarrier sets from the first frequency domain resource refers to determining the numbers of the subcarriers included in the one or more subcarrier sets in the first frequency domain resource.

[0116] Optionally, determining one or more subcarrier sets from the first frequency domain resources refers to directly determining the numbers of subcarriers included in the one or more subcarrier sets.

[0117] Optionally, the first frequency domain resource is all subcarriers included in the transmission bandwidth of the SRS, that is, the first frequency domain resource and the transmission bandwidth of the SRS both include the same N subcarriers. In this case, it can be understood that the interval between the N subcarriers is 0.

[0118] Optionally, the first frequency domain resource is part of the subcarriers included in the transmission bandwidth of the sounding reference signal SRS, and the part of the subcarriers is determined according to the transmission comb degree T and the comb shift β. For example, if the transmission comb degree T is 2, the first frequency domain resource includes N subcarriers, and the transmission bandwidth of the SRS includes 2N subcarriers. In this case, it can be understood that the N subcarriers are an equally spaced subcarrier group with an interval of 2 subcarriers. For another example, if the transmission comb degree T is 4, the first frequency domain resource includes N subcarriers, and the transmission bandwidth of the SRS includes 4N subcarriers. In this case, it can be understood that the N subcarriers are an equally spaced subcarrier group with an interval of 4 subcarriers.

[0119] It is understandable that the network device may send RRC signaling to the terminal device, and the RRC signaling may carry the transmission bandwidth of the SRS.

[0120] Optionally, the RRC signaling also carries indication information indicating the first frequency domain resource from the transmission bandwidth of the SRS. For example, the indication information is the transmission comb degree T and the comb displacement β. The indication information is used to determine the position of the first frequency domain resource from the transmission bandwidth of the SRS. Optionally, the terminal device receives configuration information indicating the number of configured SRS resources. Different SRS ports in each SRS resource can occupy different CSs in the same subcarrier set. Different SRS resources can occupy different subcarrier sets, or occupy different CSs in the same subcarrier set.

[0121] It is understandable that the terminal device may determine the first parameter p and the second parameter α in the following manner but not limited thereto.

[0122] In one example, the network device can configure the transmission bandwidth of SRS for the terminal device. The terminal device determines the total number of subcarriers corresponding to the transmission bandwidth of SRS based on the transmission bandwidth of SRS. At the same time, the network device can also configure at least two parameters of the starting subcarrier index, the number of subcarriers or the ending subcarrier index for the terminal device. Therefore, after determining the total number of subcarriers corresponding to the transmission bandwidth of SRS, the terminal device can further determine part of the subcarriers in the subcarriers corresponding to the transmission bandwidth of SRS based on at least two parameters of the starting subcarrier index, the number of subcarriers or the ending subcarrier index. At this time, the N subcarriers included in the first frequency domain resource are N consecutive subcarriers in the subcarriers corresponding to the transmission bandwidth of SRS. The value of N is determined by the starting subcarrier index and the ending subcarrier index, or the number of subcarriers. At this time, the N subcarriers included in the first frequency domain resource are consecutive subcarriers (which can also be described as N subcarriers with a subcarrier interval of 1).

[0123] For example, the SRS transmission bandwidth includes 34 RBs, each RB includes 12 subcarriers, and the total number of subcarriers corresponding to the SRS transmission bandwidth is 408. Assume that the indexes of the above 408 subcarriers are 0 to 407. The network device also configures a starting subcarrier index 101 and an ending subcarrier index 400 for the terminal device. The terminal device determines N = 300, and the first frequency domain resources include 300 consecutive subcarriers with subcarrier indexes 101 to 400.

[0124] It is understandable that the network device may send RRC signaling to the terminal device. The RRC signaling may carry the transmission bandwidth of the SRS, and the RRC signaling may also carry at least two parameters of the starting subcarrier index, the number of subcarriers, or the ending subcarrier index.

[0125] It is understandable that the network device may send MAC CE signaling to the terminal device. The MAC CE signaling may carry the SRS transmission bandwidth, and the MAC CE signaling may also carry at least two parameters of the starting subcarrier index, the number of subcarriers, or the ending subcarrier index.

[0126] In one example, the network device can configure the transmission bandwidth of SRS for the terminal device. The terminal device determines the total number of subcarriers corresponding to the transmission bandwidth of SRS based on the transmission bandwidth of SRS. At the same time, the network device can also configure the transmission comb degree T and comb shift β for the terminal device, where T is a positive integer, β∈{0,…,T-1}. The terminal device can determine N subcarriers in the subcarriers corresponding to the transmission bandwidth of SRS as the first frequency domain resources based on the transmission comb degree T and comb shift β. The value of N is determined by the total number of subcarriers corresponding to the transmission bandwidth of SRS and the transmission comb degree T. The N subcarriers included in the first frequency domain resources are N equally spaced subcarriers in the subcarriers corresponding to the transmission bandwidth of SRS, where the spacing of the subcarriers here is determined by the transmission comb degree T.

[0127] For example, the SRS transmission bandwidth includes 34 RBs, each RB includes 12 subcarriers, and the total number of subcarriers corresponding to the SRS transmission bandwidth is 408. Assume that the indexes of the above 408 subcarriers are 0 to 407. The network device also configures the transmission comb degree T and comb shift β for the terminal device.

[0128] If T=2, β=1, the terminal device determines that N=408 / 2=204, and the first frequency domain resources include 204 subcarriers of {subcarrier index 1, subcarrier index 3, subcarrier index 5, ... subcarrier index 407}.

[0129] If T=2, β=0, the terminal device determines that N=408 / 2=204, and the first frequency domain resource includes 204 subcarriers of {subcarrier index 0, subcarrier index 2, subcarrier index 4, ..., subcarrier index 406}.

[0130] If T=3, β=0, the terminal device determines that N=408 / 3=136, and the first frequency domain resource includes 136 subcarriers of {subcarrier index 0, subcarrier index 3, subcarrier index 6, ..., subcarrier index 405}.

[0131] It is understandable that the network device may send RRC signaling to the terminal device. The RRC signaling may carry the transmission bandwidth of the SRS, and the RRC signaling may also carry the transmission comb degree T and the comb shift β.

[0132] It is understandable that the network device may send a MAC CE signaling to the terminal device. The MAC CE signaling may carry the transmission bandwidth of the SRS, and the MAC CE signaling may also carry the transmission comb degree T and the comb shift β.

[0133] Optionally, each subcarrier in the first frequency domain resource is used to carry an SRS, and the SRS is used to estimate a channel of a transmission bandwidth of the SRS.

[0134] Furthermore, after determining the N subcarriers, the terminal device may determine the first parameter p based on the relationship between the first parameter p and N specified in the protocol or configured by the network device. Exemplarily, the relationship between the first parameter p and N may be that the first parameter p is the largest prime number less than or equal to N+1, or the first parameter p is the smallest prime number greater than or equal to N+1, or the first parameter p is the second largest prime number less than or equal to N+1, or the first parameter p is the second smallest prime number greater than or equal to N+1. For example, when N=408, P=409.

[0135] Optionally, the relationship between the first parameter p and N can be to define at least one value range of N. For example, the value range of N is N1 to N2 subcarriers, N2 to N3 subcarriers, then N1 to N2 subcarriers correspond to the same p value p1, N2 to N3 subcarriers correspond to the same p value p2, and p1 and p2 have different values.

[0136] Optionally, the terminal device may also receive first information, where the first information is used to indicate a first parameter p.

[0137] After the terminal device determines the first parameter p, the terminal device may determine the second parameter α based on the relationship between the first parameter p and the second parameter α as specified by the protocol or configured by the network device. For example, the relationship between the first parameter p and the second parameter α may be such that the second parameter α is the maximum primitive root of the first parameter p, or such that the second parameter α is the minimum primitive root of the first parameter p.

[0138] Optionally, the terminal device receives second information, where the second information is used to indicate a second parameter α.

[0139] Optionally, the terminal device receives second information, where the second information is used to indicate a value range of the second parameter α, and the terminal device determines the second parameter α based on the second information and the first parameter p.

[0140] It is understandable that the above-mentioned transmission comb degree T, comb shift β, first parameter p and second parameter α can be carried by one or more pieces of information, or can be carried by one RRC signaling or MAC CE signaling. This application does not limit this.

[0141] The following describes a specific solution for a terminal device to determine one or more subcarrier sets. It is understood that the following solutions 1 and 2 are merely examples and are not intended to limit the embodiments of the present application.

[0142] Option 1:

[0143] The one or more subcarrier sets are one or more of the S candidate subcarrier sets. Any two of the S candidate subcarrier sets do not have the same subcarriers, that is, the subcarriers included in any two candidate subcarrier sets are completely different.

[0144] The rth candidate subcarrier set in the S candidate subcarrier sets contains the relative index set C r The subcarriers in the determined first frequency domain resource, S is a positive integer, r∈{0,…,S-1}.

[0145] Among them, in the scenario where N>p-1, the relative index set C r for in,

[0146] Optional, relative index set C r The index value in the range is [0, N-1], relative to the index set C r The index value in represents the position of the corresponding subcarrier in the first frequency domain resource.

[0147] In addition, if p-1 is not divisible by S, then Relative index set C r Also includes the set {c r,K =log α (α r α SK mod p-1)+v}.

[0148] In addition, the relative index set C0 also includes the set {c0,0 =log α (p-1)+v}. It is understandable that due to d 0,0 =α 0 α S×0 mod p=1,c 0,0 It cannot be generated according to the above method. Here for c 0,0 A special definition is made, and the definition method can make c 0,0 All relative index sets C generated by the above method r All elements in are different.

[0149] The S relative index sets C generated by the above method r There are no identical elements in any two relative index sets in C, and there are S relative index sets C r The union of is {v,1+v,…,p-2+v}.

[0150] In the scenario where N≤p-1, the relative index set C r for The intersection of with the set {0,1,…,N-1}, where

[0151] It is understandable that the relative index set C r for The intersection with the set {0,1,…,N-1} ensures that each relative index set C r The determined candidate subcarrier set is the subcarriers in the first frequency domain resources.

[0152] In addition, if p-1 is not divisible by S, then Relative index set C r Also includes the set {c r,K =log α (α r α SK mod p-1)} and the set {0,1,…,N-1}.

[0153] In addition, the relative index set C0 also includes the set {c 0,0 =log α (p-1)} and the set {0,1,…,N-1}. It can be understood that since d 0,0 =α 0 α S×0 mod p=1,c 0,0 It cannot be generated according to the above method. Here for c 0,0 A special definition is made, and the definition method can make c 0,0 All relative index sets C generated by the above methodr All elements in are different.

[0154] The S relative index sets C generated by the above method r There are no identical elements in any two relative index sets in C, and there are S relative index sets C r The union of is {0,1,…,N-1}.

[0155] Among them, the operation Round down.

[0156] Among them, the operation log α (·) is: given any element x∈[1,p-1], log α (x)=y, y satisfies y∈[0,p-2], and α y mod p = integer of x.

[0157] In addition, the index set C r The relative index determined is c r,n The SRS sequence elements on the subcarrier are d r,n =α r α Sn mod p, w = 1, or w = -1. Δ is a real number, m∈[1,p-1],l cs is a circular shift.

[0158] Optionally, a value range of m is preset, and one value is selected from multiple m values through RRC signaling to generate an SRS signal on a corresponding SRS resource.

[0159] The following takes Solution 1 as an example to illustrate how to determine four candidate subcarrier sets when the SRS transmission bandwidth is 268 RB, T = 4, and β = 0. The first frequency domain resources include N = 268 * 12 / 4 = 804 subcarriers, and the relative indexes of the 804 subcarriers are {0, 1, ..., 803}.

[0160] (1) In the scenario where N>p-1, the largest prime number less than or equal to N+1=805 is p=797, then α=3 is the primitive root of p=797.

[0161] When v = 8, C0∪C1∪C2∪C3={8,9,…,803}. Among them, the relative index set C r for r∈{0,1,2,3}. In addition, the relative index set C0 also includes the set {c 0,0 =logα (p-1)+8}. The rth candidate subcarrier set includes the relative index set C r The subcarriers in the determined first frequency domain resources.

[0162] Specifically, C0 = {10, 14, 25, ..., 786, 795, 801}, a total of 199 elements, C1 = {17, 19, 23, ..., 794, 799, 803}, a total of 199 elements, C2 = {9, 13, 15, ..., 793, 798, 802}, a total of 199 elements, and C3 = {8, 11, 12, ..., 796, 797, 800}, a total of 199 elements.

[0163] In addition, the rth candidate subcarrier set may also include one or more of the subcarriers corresponding to the relative index set {0, 1, ..., 7}. For example, the 0th candidate subcarrier set also includes two subcarriers corresponding to the relative index set {0, 5}, the 1st candidate subcarrier set also includes four subcarriers corresponding to the relative index set {1, ..., 4}, the 2nd candidate subcarrier set also includes two subcarriers corresponding to the relative index set {6, 7}, and the 3rd candidate subcarrier set does not include any of the subcarriers corresponding to the relative index set {0, 1, ..., 7}. It will be understood that the allocation method of the subcarriers corresponding to the above relative index set {0, 1, ..., 7} is only an example and is not intended to be a limitation of the embodiments of the present application.

[0164] When v = 0, C0∪C1∪C2∪C3={0,1,…,795}. r for In addition, the relative index set C0 also includes the set {c 0,0 =log α (p-1)}. The rth candidate subcarrier set contains the relative index set C r The corresponding subcarrier.

[0165] Specifically, C0 = {2, 6, 17, ..., 778, 787, 793}, a total of 199 elements, C1 = {9, 11, 15, ..., 786, 791, 795}, a total of 199 elements, C2 = {1, 5, 7, ..., 785, 790, 794}, a total of 199 elements, and C3 = {0, 3, 4, ..., 788, 789, 792}, a total of 199 elements.

[0166] In addition, the rth candidate subcarrier set may also include one or more of the subcarriers corresponding to the relative index set {796, 797, ..., 803}. For example, the 0th candidate subcarrier set also includes five subcarriers corresponding to the relative index set {796, ..., 800}, the 1st candidate subcarrier set also includes three subcarriers corresponding to the relative index set {801, 802, 803}, and the 2nd candidate subcarrier set and the 3rd candidate subcarrier set do not include any of the subcarriers corresponding to the relative index set {796, 797, ..., 803}. It will be understood that the allocation method of the subcarriers corresponding to the above relative index set {796, 797, ..., 803} is only an example and is not intended to limit the embodiments of the present application.

[0167] It can be understood that the above v=0 or v=8 is only an example and is not intended to limit the embodiments of the present application.

[0168] In addition, no matter v=0 or v=8, or other values of v, the relative index set C r The relative index determined is c r,n The SRS sequence elements on the subcarrier are d r,n =α r α 4n mod p, w = 1, or w = -1. Δ is a real number, m∈[1,p-1],l cs is a circular shift.

[0169] In particular, when v = 8, the SRS sequence elements on the subcarriers corresponding to the relative index set {0, 1, ..., 7} can be random sequences or other preset sequences. Similarly, when v = 0, the SRS sequence elements on the subcarriers corresponding to the relative index set {796, 797, ..., 803} can be random sequences or other preset sequences.

[0170] (2) In the scenario where N≤p-1, the smallest prime number greater than or equal to N+1=805 is p=809, and α=3 is the primitive root of p=809, then

[0171] The rth candidate subcarrier set contains the relative index set C r Corresponding subcarrier, relative index set C r for The intersection of with the set {0,1,…,803}, where r∈{0,1,2,3}. In addition, the relative index set C0 also includes the set {c 0,0 =log αThe intersection of (p-1)} and the set {0,1,…,803}.

[0172] Specifically, C0 = {1, 2, 3, ..., 790, 794, 799}, a total of 202 elements, C1 = {7, 9, 12, ..., 789, 796, 803}, a total of 201 elements, C2 = {0, 5, 8, ..., 800, 801, 802}, a total of 201 elements, and C3 = {4, 16, 17, ..., 793, 795, 797}, a total of 200 elements.

[0173] Relative index set C r The relative index determined is c r,n The SRS sequence elements on the subcarrier are d r,n =α r α 4n mod p, w = 1, or w = -1. Δ is a real number, m∈[1,p-1],l cs is a circular shift.

[0174] Solution 2: One or more subcarrier sets are one or more of the S candidate subcarrier sets. No two of the S candidate subcarrier sets have the same subcarrier, that is, any two candidate subcarrier sets are completely different. The rth candidate subcarrier set in the S candidate subcarrier sets contains the relative index set C r The subcarriers in the determined first frequency domain resource, S is a positive integer, r∈{0,…,S-1}.

[0175] In the scenario where N>p-1, the relative index set C r for in,

[0176] Optional, relative index set C r The index value in the range is [0, N-1], relative to the index set C r The index value in represents the position of the corresponding subcarrier in the first frequency domain resource.

[0177] In addition, if p-1 is not divisible by S, then Relative index set C r Also includes the set {c r,K =α r α SK mod p-1+v}.

[0178] The S relative index sets C generated by the above method r There are no identical elements in any two relative index sets in C, and there are S relative index sets Cr The union of is {v,1+v,…,p-2+v}.

[0179] In the scenario where N≤p-1, the relative index set C r for The intersection of with the set {0,1,…,N-1}, where

[0180] It is understandable that the relative index set C r for The intersection with the set {0,1,…,N-1} ensures that each relative index set C r The determined candidate subcarrier set is the subcarriers in the first frequency domain resources.

[0181] In addition, if p-1 is not divisible by S, then Relative index set C r Also includes the set {c r,K =α r α SK mod p-1} with the set {0,1,…,N-1}.

[0182] The S relative index sets C generated by the above method r There are no identical elements in any two relative index sets in C, and there are S relative index sets C r The union of is {0,1,…,N-1}.

[0183] Among them, the operation Round down.

[0184] In addition, the index set C r The relative index determined is c r,n The SRS sequence elements on the subcarrier are l cs is the cyclic shift, Δ is a real number, w=1 or w=-1, or l cs is the cyclic shift, Δ is a real number, w=1 or w=-1.

[0185] Operation log α (·) is: given any element x∈[1,p-1], log α (x)=y, y satisfies y∈[0,p-2], and α y mod p = integer of x.

[0186] Optionally, a value range of m is preset, and one value is selected from multiple m values through RRC signaling to generate an SRS signal on a corresponding SRS resource.

[0187] The following takes Solution 2 as an example to illustrate how to determine two candidate subcarrier sets when the SRS transmission bandwidth is 268 RB, T = 4, and β = 0. The first frequency domain resource includes N = 268*12 / 4 = 804 subcarriers, and the relative indexes of the 804 subcarriers are {0, 1, ..., 803}.

[0188] (1) In the scenario where N>p-1, the largest prime number less than or equal to N+1=805 is p=797, then K=398, and α=3 is the primitive root of p=797.

[0189] When v = 8, C0∪C1 = {8,9,…,803}. Among them, the relative index set C r for The rth candidate subcarrier set contains the relative index set C r The corresponding subcarrier.

[0190] In addition, the rth candidate subcarrier set also includes one or more of the subcarriers corresponding to the relative index set {0, 1, ..., 7}. For example, the 0th candidate subcarrier set also includes four subcarriers corresponding to the relative index set {0, 2, 4, 6}, and the 1st candidate subcarrier set also includes four subcarriers corresponding to the relative index set {1, 3, 5, 7}. It will be understood that the allocation method of the subcarriers corresponding to the above relative index set {0, 1, ..., 7} is only an example and is not intended to limit the embodiments of the present application.

[0191] When v = 0, C0∪C1 = {0, 1, ..., 795}. Among them, the relative index set C r for The rth candidate subcarrier set contains the relative index set C r The corresponding subcarrier.

[0192] In addition, the rth candidate subcarrier set further includes one or more subcarriers corresponding to the relative index set {796, 797, ..., 803}. For example, the 0th candidate subcarrier set also includes four subcarriers corresponding to the relative index set {796, 798, 800, 802}. The 1st candidate subcarrier set also includes four subcarriers corresponding to the relative index set {797, 799, 801, 803}.

[0193] It can be understood that the above v=0 or v=8 is only an example and is not intended to limit the embodiments of the present application.

[0194] In addition, no matter v=0 or v=8, or other values of v, the index set C r The relative index determined is c r,n The SRS sequence elements on the subcarrier are l cs is the cyclic shift, Δ is a real number, w=1 or w=-1, or l cs is the cyclic shift, Δ is a real number, w=1 or w=-1.

[0195] (2) In the scenario where N≤p-1, the smallest prime number greater than or equal to N+1=805 is p=809, and α=3 is the primitive root of p=809, then

[0196] The rth candidate subcarrier set contains the relative index set C r Corresponding subcarrier, relative index set C r for The intersection of with the set {0,1,…,803}, where

[0197] Index Set C r The relative index determined is c r,n The SRS sequence elements on the subcarrier are l cs is the cyclic shift, Δ is a real number, w=1 or w=-1, or l cs is the cyclic shift, Δ is a real number, w=1 or w=-1.

[0198] The following points need to be explained for the above-mentioned solutions 1 and 2:

[0199] First, l cs Can have many possible values, for example, l cs It can be equal to 0. Each subcarrier set in the one or more subcarrier sets determined by the terminal device corresponds to one or more l cs If the terminal device determines multiple subcarrier sets, the l corresponding to the multiple subcarrier sets cs The value of can be different.

[0200] l cs The value of can be configured by signaling, for example, by the network device. The network device can be configured according to different csThe value of distinguishes different SRS signals and thus distinguishes different terminal devices. Therefore, the network device can assign different l cs Alternatively, network devices can use different values of cs The value of distinguishes different SRS signals, and further distinguishes different ports (also called antennas or virtual ports) of the same terminal device. Therefore, the network device can assign different l cs The value of realizes code division multiplexing.

[0201] Exemplarily, the terminal device transmits SRS via two different ports in two subcarrier sets. The two different ports are hereinafter referred to as a first port and a second port. The two subcarrier sets are hereinafter referred to as a first subcarrier set and a second subcarrier set. The terminal device transmits SRS via a first port in a first subcarrier set, wherein the l of the SRS sequence element is cs The terminal device sends SRS through the second port in the second subcarrier set, wherein the l of the SRS sequence element cs The first value and the second value may be different.

[0202] Second, in the scenario where N>p-1, the rth candidate subcarrier set includes the relative index set C r The determined subcarriers in the first frequency domain resource may also include the subcarriers in the first frequency domain resource except the relative index set C r At least one subcarrier other than the subcarriers in the determined first frequency domain resource, for example, the examples corresponding to the above scheme 1 and scheme 2 respectively. At least one subcarrier and relative index set The subcarriers in the determined first frequency domain resources do not overlap, that is, there are no overlapping subcarriers in any two subcarrier sets.

[0203] In some embodiments, for example, when S=2, after the terminal device adopts the above-mentioned scheme 1 or scheme 2 to determine the subcarriers in the first frequency domain resources determined by the relative index set C1, the terminal device can directly regard the subcarriers in the first frequency domain resources determined by the relative index set C1 as a subcarrier set (for example, recorded as subcarrier set 1), and then regard the subcarriers in the N subcarriers except the subcarriers in the first frequency domain resources determined by the relative index set C1 as a subcarrier set (for example, recorded as subcarrier set 0). Alternatively, when S=4, the terminal device adopts the above-mentioned scheme 1 or scheme 2, and the terminal device can directly use the subcarriers in the first frequency domain resources determined by the relative index set C1 as a subcarrier set (for example, recorded as subcarrier set 1), and directly use the subcarriers in the first frequency domain resources determined by the relative index set C2 as a subcarrier set (for example, recorded as subcarrier set 2), and directly use the subcarriers in the first frequency domain resources determined by the relative index set C3 as a subcarrier set (for example, recorded as subcarrier set 3), and then use the subcarriers in the N subcarriers except for subcarrier sets 1 to 3 as a subcarrier set (for example, recorded as subcarrier set 0). Therefore, the terminal device can adopt the above-mentioned scheme 1 or scheme 2 to directly determine S-1 subcarrier sets, and then the remaining subcarrier set is the subcarrier in the N subcarriers except for the above-mentioned S-1 subcarrier sets.

[0204] Third, the relative index set C r The index value in is the relative position information of the subcarrier in the first frequency domain resource. It is also necessary to determine the relative index set C in the first frequency domain resource. r The index value of the corresponding subcarrier in the system bandwidth

[0205] in, T is a positive integer, β∈{0,…,T-1}, is the frequency domain shift value with subcarrier as the counting unit. in, The number of subcarriers included in each resource block, is the frequency domain shift value with resource blocks as the counting unit.

[0206] For example, the transmission bandwidth of SRS is 268 RB, T=4, β=0, but

[0207] For example, in the above solution 1 example, in the scenario N>p-1, in the design corresponding to v=0, C0={2,6,17,…,778,787,793}, a total of 199 elements, C1={9,11,15,…,786,791,795}, a total of 199 elements, C2={1,5,7,…,785,790,794}, a total of 199 elements, and C3={0,3,4,…,788,789,792}, a total of 199 elements.

[0208] The 0th candidate subcarrier set includes subcarriers in the first frequency domain resources determined by the relative index set C0, specifically including 199 subcarriers with index values {128, 144, 188, ..., 3232, 3268, 3292} in the system bandwidth;

[0209] The first candidate subcarrier set includes subcarriers in the first frequency domain resources determined by the relative index set C1, specifically including 199 subcarriers with index values {156, 164, 180, ..., 3264, 3284, 3300} in the system bandwidth;

[0210] The second candidate subcarrier set includes subcarriers in the first frequency domain resources determined by the relative index set C2, specifically including 199 subcarriers with index values {124, 140, 148, ..., 3260, 3280, 3296} in the system bandwidth;

[0211] The third candidate subcarrier set includes subcarriers in the first frequency domain resources determined by the relative index set C3, specifically including 199 subcarriers with index values {120, 132, 136, ..., 3272, 3276, 3288} in the system bandwidth.

[0212] Fourth, within an OFDM symbol used to transmit SRS, each possible value of β in {0, ..., T-1} corresponds to a frequency domain resource group, and each frequency domain resource group is a subcarrier group with equal intervals, and the interval is T subcarriers. For the frequency domain resource group corresponding to each possible value of β in {0, ..., T-1}, the above-mentioned Figure 5 The method of the illustrated embodiment obtains S candidate subcarrier sets. The value of S may also be different for different possible values of β. Furthermore, the terminal device may select one or more subcarrier sets from the S candidate subcarrier sets corresponding to one of the possible values of β to transmit the SRS.

[0213] For example, assuming T = 2, β∈{0,1}, when β = 0, a frequency domain resource group (hereinafter referred to as frequency domain resource group 1) can be determined, and when β = 1, a frequency domain resource group (hereinafter referred to as frequency domain resource group 2) can be determined. Among them, frequency domain resource group 1 can adopt the above Figure 5 The method provided in the embodiment shown determines 4 candidate subcarrier sets, and the frequency domain resource group 2 can adopt the above Figure 5 The method provided in the illustrated embodiment determines two candidate subcarrier sets. The terminal device can transmit the SRS on one or more subcarrier sets from the four candidate subcarrier sets determined by frequency domain resource group 1. Alternatively, the terminal device can transmit the SRS on one or more subcarrier sets from the two candidate subcarrier sets determined by frequency domain resource group 2.

[0214] In addition, for each possible value of β in a subset G of {0, ..., T-1}, the above-mentioned frequency domain resource group can be used based on the frequency domain resource group. Figure 5 The method of the illustrated embodiment obtains S candidate subcarrier sets. The value of S can also vary for different possible values of β. For any β value in the set {0,…,T-1}\G, since the corresponding frequency domain resource group is an equally spaced subcarrier group, the technical solution provided in the background technology can be used to send SRS, such as sending a ZC sequence. The operation ·\· is a set subtraction operation.

[0215] For example, Figure 6 As shown, within an OFDM symbol used to send SRS, assuming T = 2, β∈{0,1}, when β = 0, a frequency domain resource group (hereinafter referred to as the old comb teeth) can be determined, and when β = 1, a frequency domain resource group (hereinafter referred to as the new comb teeth) can be determined. The old comb teeth can be used for old users (i.e., some terminal devices) to send SRS, and the new comb teeth can be used as above. Figure 5 The method provided in the illustrated embodiment determines four candidate subcarrier sets. New users (ie, another part of terminal devices) can send SRS on one or more subcarrier sets among the four candidate subcarrier sets.

[0216] Therefore, the technical solution provided in the embodiment of the present application and the technical solution provided in the background technology can coexist in the same OFDM symbol. Therefore, the technical solution provided in the embodiment of the present application is compatible with the technical solution provided in the background technology and has a wide range of application scenarios.

[0217] Fifth, the subcarrier sets determined by Schemes 1 and 2 above can make the corresponding columns of F as orthogonal as possible, which is beneficial for channel estimation. For example, the metric μ is the maximum correlation coefficient between any two columns of F, which represents the column orthogonality of F. The smaller μ, the better the channel estimation performance:

[0218]

[0219] Among them, F i is the i-th column of F, F j is the j-th column of F.

[0220] For example, in the scenario N>p-1 in the above solution 1, the design corresponding to v=0 is:

[0221] In the 0th candidate subcarrier set, the partial DFT matrix F corresponding to the 199 subcarriers determined by the relative index set C0 is a matrix with 199 rows and 796 columns. Each column of the matrix F is a basis vector, and the 796 columns are 796 basis vectors of length 199. In this design, the maximum correlation coefficient between any two of the 796 basis vectors is 0.1071, that is, μ = 0.1071.

[0222] In the first candidate subcarrier set, the partial DFT matrix F corresponding to the 199 subcarriers determined by the relative index set C1 is a matrix with 199 rows and 796 columns. Each column of matrix F is a basis vector, and the 796 columns are 796 basis vectors of length 199. In this design, the maximum correlation coefficient between any two of the 796 basis vectors is 0.1072, that is, μ = 0.1072.

[0223] In the second candidate subcarrier set, the partial DFT matrix F corresponding to the 199 subcarriers determined by the relative index set C2 is a matrix with 199 rows and 796 columns. Each column of matrix F is a basis vector, and the 796 columns are 796 basis vectors of length 199. In this design, the maximum correlation coefficient between any two of the 796 basis vectors is 0.1074, that is, μ = 0.1074.

[0224] In the third candidate subcarrier set, the partial DFT matrix F corresponding to the 199 subcarriers determined by the relative index set C3 is a matrix with 199 rows and 796 columns. Each column of matrix F is a basis vector, and the 796 columns are 796 basis vectors of length 199. In this design, the maximum correlation coefficient between any two of the 796 basis vectors is 0.1066, that is, μ = 0.1066.

[0225] In the above example of S=4, a group of 796 equally spaced subcarriers is divided into 4 candidate subcarrier sets, each candidate subcarrier set corresponds to 796 quasi-orthogonal basis vectors of length 199, and the cross-correlation between any two basis vectors in the group of quasi-orthogonal basis vectors is extremely low. In the technical solution provided by the background art, a group of 796 equally spaced subcarriers is divided into 4 groups according to uniform comb teeth, and each group of subcarriers corresponds to 199 orthogonal basis vectors of length 199. It can be seen that the embodiment of the present application can use the same frequency domain resources to obtain S times the number of available basis vectors provided by the solution of the background art, and the cross-correlation between the obtained basis vectors is extremely low, thereby achieving S times code domain expansion.

[0226] In addition, it should be noted that, for example, in the design of v=0 in the scenario N>p-1 in the above-mentioned solution 1, the r-th candidate subcarrier set includes the relative index set C r In addition to the subcarriers in the determined first frequency domain resources, one or more subcarriers in the first frequency domain resources determined by the relative index set {796, 797, ..., 803} may also be included. For example, the 0th candidate subcarrier set also includes five subcarriers corresponding to the relative index set {796, ..., 800}, and the 1st candidate subcarrier set also includes three subcarriers corresponding to the relative index set {801, 802, 803}. It can be understood that the number of subcarriers corresponding to the relative index set {796, 797, ..., 803} is very small, and its allocation method and usage method have little effect on the channel estimation performance. The five subcarriers corresponding to the relative index set {796, ..., 800} can be used for channel estimation together with other subcarriers in the 0th candidate subcarrier set, or they can be used for channel estimation separately. The three subcarriers corresponding to the relative index set {801, 802, 803} can be used for channel estimation together with other subcarriers in the 1st candidate subcarrier set, or they can be used for channel estimation separately.

[0227] In addition, it should be noted that the embodiment of the present application also provides a design scheme for the SRS sequence corresponding to the determination of the S candidate subcarrier set. Combined with the design scheme of the SRS sequence provided in the embodiment of the present application, it can approach the peak to average power ratio (PAPR) performance of the existing uniform comb pilot allocation scheme combined with the existing ZC sequence.

[0228] Step 510: The terminal device sends an SRS on one or more subcarrier sets.

[0229] It should be noted that the network device can configure which subcarrier set or sets the terminal device uses. For example, each subcarrier set has an index, and the network device can configure the index of the subcarrier set used by the terminal device. Alternatively, the terminal device can notify the network device of the index of the subcarrier set used.

[0230] Optionally, the terminal device generates a frequency domain SRS sequence according to the SRS sequence element and CS, and r,n Perform IFFT transformation to form the SRS signal to be sent.

[0231] In addition, it should be noted that the terminal device may split the determined SRS sequence element into multiple segments, and transmit the multiple segments in a frequency hopping manner.

[0232] Optionally, the terminal device receives SRS frequency hopping configuration information, where the configuration information is used to indicate the number of SRS frequency hopping times and / or the SRS frequency hopping bandwidth. The terminal device determines, based on the above SRS sequence elements, an SRS sequence element for transmitting the SRS on each SRS frequency hopping bandwidth.

[0233] Optionally, the terminal device determines an SRS sequence element corresponding to the frequency domain position according to the frequency domain position occupied by the frequency hopping bandwidth.

[0234] It is understandable that the network device may determine one or more subcarrier sets in the same manner as step 500, and receive the SRS from the terminal device on the determined subcarrier sets, which will not be described in detail here.

[0235] The following further illustrates the embodiments of the present application with reference to Example 1 and Example 2.

[0236] Example 1:

[0237] The method provided in Solution 1 is used to divide N subcarriers into two subcarrier sets, which are represented by subcarrier set 0 and subcarrier set 1 respectively, wherein the number of subcarriers included in each subcarrier set is N / 2.

[0238] If N=p-1, the relative index set C1 corresponding to subcarrier set 1 is constructed as follows:

[0239]

[0240] in,

[0241] The relative index set C0 corresponding to the subcarrier set 0 is the complement of the relative index set C1.

[0242] For example, when p=409, N=408, and α=21, the relative index set C1 corresponding to subcarrier set 1 is {1 23 58 10 12 15 16 20 22 26 30 35 38 3942 45 46 47 48 49 53 54 55…, 406}, and the relative index set C0 is the complement of the relative index set C1.

[0243] If p - 1 < N, N in the above formula can be replaced by p - 1. According to the definition of the above relative index set, determine the relative index set C1' corresponding to sub - carrier set 1 and the relative index set C0' corresponding to sub - carrier set 0. From the sub - carriers corresponding to the N - P + 1 index values {p - 1, p, …, N - 1}, determine the first sub - carrier set and the second sub - carrier set, where sub - carrier set 1 includes the first sub - carrier set and sub - carrier set 0 includes the second sub - carrier set. For example, the N - P + 1 sub - carriers can be randomly assigned to sub - carrier set 1 and sub - carrier set 0.

[0244] If p - 1 > N, N in the above formula can be replaced by p - 1. First, determine the relative index set C1” corresponding to sub - carrier set 1 and the relative index set C0” corresponding to sub - carrier set 0. Further, delete the index values in C1” and C0” that exceed N - 1 according to N, and obtain sub - carrier set 1 and sub - carrier set 0. Among them, the number of deleted index values is P - 1 - N.

[0245] Example 2:

[0246] Use the method provided in Scheme 1 to divide N sub - carriers into four sub - carrier sets, which are represented by sub - carrier set 1, sub - carrier set 2, sub - carrier set 3, and sub - carrier set 0 respectively. Among them, the number of sub - carriers in each set is not necessarily the same.

[0247] If N = p - 1 and N is divisible by 4, then the number of elements in the relative index sets C0 to C3 is

[0248] Among them, C1:

[0249] C2:

[0250] C3:

[0251] C0: is the set {0, …, N - 1}\(C1∪C2∪C3).

[0252] If N is not divisible by 4 (where N mod 4 = 2), then the number of elements in the relative index sets C0 and C1 is The number of elements in the relative index sets C2 and C3 is

[0253] C1:

[0254] C2:

[0255] C3:

[0256] C0 is the set {0, …, N - 1} \ (C1 ∪ C2 ∪ C3).

[0257] If p - 1 < N, N in the above formula can be replaced by p - 1. First, determine the relative index sets C0’ to C3’, and then further expand according to N - P + 1 to obtain the sub - carrier sets 0 to 3. For example, N - P + 1 sub - carriers can be randomly assigned to sub - carrier sets 0 to sub - carrier set 3.

[0258] If p - 1 > N, N in the above formula can be replaced by p - 1. First, determine the relative index sets C0” to C3”, and then delete the index values in C0” to C3” that exceed N - 1 according to N, to obtain the sub - carrier sets 0 to 3. Among them, the number of deleted index values is P - 1 - N.

[0259] It can be understood that, in order to implement the functions in the above embodiments, the network device and the terminal device include the corresponding hardware structures and / or software modules for performing each function. Those skilled in the art should easily realize that, combining the units and method steps of each example described in the embodiments disclosed in the present application, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving hardware depends on the specific application scenarios and design constraints of the technical solution.

[0260] Figure 7 and Figure 8 FIG. is a schematic structural diagram of a possible communication device provided by an embodiment of the present application. These communication devices can be used to implement the functions of the terminal device or the network device in the above method embodiments, and thus can also achieve the beneficial effects possessed by the above method embodiments. In the embodiments of the present application, the communication device can be a terminal device, a network device, or a module (such as a chip) applied to a terminal device or a network device.

[0261] such as Figure 7 As shown, the communication device 700 includes a processing unit 710 and a transceiver unit 720. The communication device 700 is used to implement the functions of the terminal device or the network device in the method embodiment shown in 5 above.

[0262] When the communication device 700 is used to implement Figure 5The functions of the terminal device in the method embodiment shown are: the processing unit 710 is used to determine one or more subcarrier sets, and the one or more subcarrier sets are determined by a first parameter p and a second parameter α from a first frequency domain resource, and the first frequency domain resource is determined by the transmission bandwidth of the SRS. The number of subcarriers included in the first frequency domain resource is N, and the N subcarriers included in the first frequency domain resource are equally spaced. The first parameter p is a prime number, and the second parameter α is the original root of the first parameter p; the transceiver unit 720 is used to send the SRS on the one or more subcarrier sets.

[0263] When the communication device 700 is used to implement Figure 5 The function of the network device in the method embodiment shown is: the processing unit 710 is used to determine one or more subcarrier sets, and the one or more subcarrier sets are determined by a first parameter p and a second parameter α from a first frequency domain resource, and the first frequency domain resource is determined by the transmission bandwidth of the sounding reference signal SRS, and the number of subcarriers included in the first frequency domain resource is N, and the N subcarriers included in the first frequency domain resource are equally spaced, the first parameter p is a prime number, and the second parameter α is the original root of the first parameter p; the transceiver unit 720 is used to receive the SRS on the one or more subcarrier sets.

[0264] For more detailed description of the processing unit 710 and the transceiver unit 720, please refer to Figure 5 The relevant description in the method embodiment shown is directly obtained and will not be repeated here.

[0265] like Figure 8 As shown, communication device 800 includes a processor 810 and an interface circuit 820. Processor 810 and interface circuit 820 are coupled to each other. It will be appreciated that interface circuit 820 may be a transceiver or an input / output interface. Optionally, communication device 800 may further include a memory 830 for storing instructions executed by processor 810, input data required by processor 810 to execute instructions, or data generated after processor 810 executes instructions.

[0266] When the communication device 800 is used to implement Figure 5 When the method is shown, the processor 810 is used to implement the functions of the processing unit 710, and the interface circuit 820 is used to implement the functions of the transceiver unit 720.

[0267] When the communication device is a chip used in a terminal device, the terminal device chip implements the functions of the terminal device in the above method embodiments. The terminal device chip receives information from other modules in the terminal device (such as a radio frequency module or antenna), and the information is sent by the network device to the terminal device; or the terminal device chip sends information to other modules in the terminal device (such as a radio frequency module or antenna), and the information is sent by the terminal device to the network device.

[0268] When the communication device is a chip used in a network device, the network device chip implements the network device functions of the above method embodiments. The network device chip receives information from other modules in the network device (such as a radio frequency module or antenna), and the information is sent by the terminal device to the network device; or the network device chip sends information to other modules in the network device (such as a radio frequency module or antenna), and the information is sent by the network device to the terminal device.

[0269] It is understood that the processor in the embodiments of the present application may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0270] The method steps in the embodiments of the present application can be implemented by hardware or by a processor executing software instructions. The software instructions can be composed of corresponding software modules, which can be stored in random access memory (RAM), flash memory, read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), registers, hard disks, mobile hard disks, CD-ROMs, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and storage medium can be located in an ASIC. In addition, the ASIC can be located in a network device or a terminal device. Of course, the processor and storage medium can also exist as discrete components in a network device or a terminal device.

[0271] In the above embodiments, they can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, they can 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 a computer, the process or function described in the embodiment of the present application is executed in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device or other programmable device. The computer program or instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program or instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via wired or wireless means. 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 data center that integrates one or more available media. The available medium can be a magnetic medium, such as a floppy disk, a hard disk, or a tape; it can also be an optical medium, such as a digital video disc (DVD); it can also be a semiconductor medium, such as a solid state drive (SSD).

[0272] In the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0273] In this application, "at least one" means one or more, and "more" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. In the text description of this application, the character " / " generally indicates that the previous and next associated objects are in an "or" relationship; in the formulas of this application, the character " / " indicates that the previous and next associated objects are in a "division" relationship.

[0274] It is understood that the various numbers used in the embodiments of this application are merely for ease of description and are not intended to limit the scope of the embodiments of this application. The order of the sequence numbers of the above-mentioned processes does not necessarily imply a specific order of execution; the order of execution of the processes should be determined by their functions and inherent logic.

Claims

1. A communication method, characterized in that: The method includes: Determine one or more subcarrier sets, where the one or more subcarrier sets are determined by a first parameter p and a second parameter α from a first frequency domain resource, where the first frequency domain resource is determined by a transmission bandwidth of a sounding reference signal (SRS), where the number of subcarriers included in the first frequency domain resource is N, and the N subcarriers included in the first frequency domain resource are equally spaced, where the first parameter p is a prime number, and where the second parameter α is a primitive root of the first parameter p; where the first parameter p is a maximum prime number less than or equal to N+1; or where the first parameter p is a minimum prime number greater than or equal to N+1; transmitting the SRS on the one or more subcarrier sets; The one or more subcarrier sets are one or more of S candidate subcarrier sets, and any two subcarrier sets in the S candidate subcarrier sets respectively include different subcarriers; The rth candidate subcarrier set in the S candidate subcarrier sets includes a relative index set C r The subcarriers in the determined first frequency domain resource, S is a positive integer, r∈{0,…,S-1}, The relative index set C r for in, v∈{0,1,…,N-p+1}, or, The relative index set C r for The intersection of with the set {0,1,…,N-1}, where Operation log α (·) is: given any element x∈[1,p-1], log α (x)=y, y satisfies y∈[0,p-2], and α y mod p = integer of x.

2. The method according to claim 1, wherein The relative index set C r The relative index is c r,n The SRS sequence elements on the subcarrier are d r,n =α r α Sn mod p, w = 1, or w = -1, Δ is a real number, m∈[1,p-1],l cs is a circular shift.

3. The method according to claim 1 or 2, wherein: The rth candidate subcarrier set also includes the first frequency domain resources except the relative index set C r When at least one subcarrier other than the determined subcarrier is The at least one subcarrier and the relative index set The determined subcarriers in the first frequency domain resources do not overlap.

4. The method according to claim 1 or 2, wherein: The relative index set C r The determined index value of the subcarrier in the first frequency domain resource in the system bandwidth is: Where, T is a positive integer, β∈{0,…,T-1}, It is the frequency domain shift value with subcarrier as the counting unit.

5. The method according to claim 1 or 2, wherein: The second parameter α is the maximum primitive root of the first parameter p; or, the second parameter α is the minimum primitive root of the first parameter p.

6. The method according to claim 1 or 2, wherein: First information is received, where the first information is used to indicate a value of a configuration parameter, where the configuration parameter includes at least one of a first parameter p, a second parameter α, a parameter T, and a parameter β.

7. A communication method, characterized in that: The method includes: Determine one or more subcarrier sets, where the one or more subcarrier sets are determined by a first parameter p and a second parameter α from a first frequency domain resource, where the first frequency domain resource is determined by a transmission bandwidth of a sounding reference signal (SRS), where the number of subcarriers included in the first frequency domain resource is N, and the N subcarriers included in the first frequency domain resource are equally spaced, where the first parameter p is a prime number, where the second parameter α is a primitive root of the first parameter p, and where the first parameter p is a maximum prime number less than or equal to N+1; or, where the first parameter p is a minimum prime number greater than or equal to N+1; transmitting the SRS on the one or more subcarrier sets; The one or more subcarrier sets are one or more of the S candidate subcarrier sets, any two of the S candidate subcarrier sets do not have the same subcarrier, and the rth candidate subcarrier set in the S candidate subcarrier sets includes the relative index set C r The subcarriers in the determined first frequency domain resource, S is a positive integer, r∈{0,…,S-1}; The relative index set C r for in, v∈{0,1,…,N-p+1}, or, The relative index set C r for The intersection of with the set {0,1,…,N-1}, where 8. The method according to claim 7, wherein The relative index set C r The relative index is c r,n The SRS sequence elements on the subcarrier are m∈[1,p-2], Δ is a real number, l cs is a cyclic shift, w=1 or w=-1, or m∈[1,p-2],Δ is a real number, l cs is a cyclic shift, w=1 or w=-1; Operation log α (·) is: given any element x∈[1,p-1], log α (x)=y, y satisfies y∈[0,p-2], and α y mod p = integer of x.

9. The method according to claim 7 or 8, wherein The rth candidate subcarrier set also includes the first frequency domain resources except the relative index set C r When at least one subcarrier other than the determined subcarrier is The at least one subcarrier and the relative index set The determined subcarriers in the first frequency domain resources do not overlap.

10. The method according to claim 7 or 8, characterized in that The relative index set C r The determined index value of the subcarrier in the first frequency domain resource in the system bandwidth is: Where, T is a positive integer, β∈{0,…,T-1}, It is the frequency domain shift value with subcarrier as the counting unit.

11. The method according to claim 7 or 8, wherein The second parameter α is the maximum primitive root of the first parameter p; or, the second parameter α is the minimum primitive root of the first parameter p.

12. The method according to claim 7 or 8, wherein First information is received, where the first information is used to indicate a value of a configuration parameter, where the configuration parameter includes at least one of a first parameter p, a second parameter α, a parameter T, and a parameter β.

13. A communication method, characterized in that: The method includes: Determine one or more subcarrier sets, where the one or more subcarrier sets are determined by a first parameter p and a second parameter α from a first frequency domain resource, where the first frequency domain resource is determined by a transmission bandwidth of a sounding reference signal (SRS), where the number of subcarriers included in the first frequency domain resource is N, and the N subcarriers included in the first frequency domain resource are equally spaced, where the first parameter p is a prime number, and where the second parameter α is a primitive root of the first parameter p; where the first parameter p is a maximum prime number less than or equal to N+1; or where the first parameter p is a minimum prime number greater than or equal to N+1; receiving the SRS on the one or more sets of subcarriers; The one or more subcarrier sets are one or more of S candidate subcarrier sets, and any two subcarrier sets in the S candidate subcarrier sets respectively include different subcarriers; The rth candidate subcarrier set in the S candidate subcarrier sets includes a relative index set C r The subcarriers in the determined first frequency domain resource, S is a positive integer, r∈{0,…,S-1}, The relative index set C r for in, v∈{0,1,…,N-p+1}, or, The relative index set C r for The intersection of with the set {0,1,…,N-1}, where Operation log α (·) is: given any element x∈[1,p-1], log α (x)=y, y satisfies y∈[0,p-2], and α y mod p = integer of x.

14. The method according to claim 13, wherein The relative index set C r The relative index is c r,n The SRS sequence elements on the subcarrier are d r,n =α r α Sn mod p, w = 1, or w = -1; Δ is a real number, m∈[1,p-1],l cs is a circular shift.

15. The method according to claim 13 or 14, characterized in that The rth candidate subcarrier set also includes the first frequency domain resources except the relative index set C r When at least one subcarrier other than the determined subcarrier is The at least one subcarrier and the relative index set The determined subcarriers in the first frequency domain resources do not overlap.

16. The method according to claim 13 or 14, wherein: The relative index set C r The determined index value of the subcarrier in the first frequency domain resource in the system bandwidth is: Where, T is a positive integer, β∈{0,…,T-1}, It is the frequency domain shift value with subcarrier as the counting unit.

17. The method according to claim 13 or 14, wherein: The second parameter α is the maximum primitive root of the first parameter p; or, the second parameter α is the minimum primitive root of the first parameter p.

18. The method according to claim 13 or 14, wherein: First information is sent, where the first information is used to indicate a value of a configuration parameter, where the configuration parameter includes at least one of a first parameter p, a second parameter α, a parameter T, and a parameter β.

19. A communication method, characterized in that: The method includes: Determine one or more subcarrier sets, where the one or more subcarrier sets are determined by a first parameter p and a second parameter α from a first frequency domain resource, where the first frequency domain resource is determined by a transmission bandwidth of a sounding reference signal (SRS), where the number of subcarriers included in the first frequency domain resource is N, and the N subcarriers included in the first frequency domain resource are equally spaced, where the first parameter p is a prime number, and where the second parameter α is a primitive root of the first parameter p; where the first parameter p is a maximum prime number less than or equal to N+1; or where the first parameter p is a minimum prime number greater than or equal to N+1; receiving the SRS on the one or more sets of subcarriers; The one or more subcarrier sets are one or more of the S candidate subcarrier sets, any two of the S candidate subcarrier sets do not have the same subcarrier, and the rth candidate subcarrier set in the S candidate subcarrier sets includes the relative index set C r The subcarriers in the determined first frequency domain resource, S is a positive integer, r∈{0,…,S-1}; The relative index set C r for in, v∈{0,1,…,N-p+1}, or, The relative index set C r for The intersection of with the set {0,1,…,N-1}, where 20. The method according to claim 19, wherein The relative index set C r The relative index is c r,n The SRS sequence elements on the subcarrier are m∈[1,p-2], Δ is a real number, l cs is a cyclic shift, w=1 or w=-1, or m∈[1,p-2],Δ is a real number, l cs is a cyclic shift, w=1 or w=-1; Operation log α (·) is: given any element x∈[1,p-1], log α (x)=y, y satisfies y∈[0,p-2], and α y mod p = integer of x.

21. The method according to claim 19 or 20, wherein: The rth candidate subcarrier set also includes the first frequency domain resources except the relative index set C r When at least one subcarrier other than the determined subcarrier is The at least one subcarrier and the relative index set The determined subcarriers in the first frequency domain resources do not overlap.

22. The method according to claim 19 or 20, wherein: The relative index set C r The determined index value of the subcarrier in the first frequency domain resource in the system bandwidth is: Where, T is a positive integer, β∈{0,…,T-1}, It is the frequency domain shift value with subcarrier as the counting unit.

23. The method according to claim 19 or 20, wherein: The second parameter α is the maximum primitive root of the first parameter p; or, the second parameter α is the minimum primitive root of the first parameter p.

24. The method according to claim 19 or 20, wherein: First information is sent, where the first information is used to indicate a value of a configuration parameter, where the configuration parameter includes at least one of a first parameter p, a second parameter α, a parameter T, and a parameter β.

25. A communication device, characterized in that: Comprising means for performing the method of any one of claims 1 to 24.

26. A communication device, characterized in that: It includes a processor and an interface circuit, wherein the interface circuit is used to receive signals from other communication devices outside the communication device and transmit them to the processor or send signals from the processor to other communication devices outside the communication device, and the processor is used to implement the method as described in any one of claims 1 to 24 through a logic circuit or executing code instructions.

27. A computer-readable storage medium, characterized in that The storage medium stores a computer program or instruction, and when the computer program or instruction is executed by the communication device, the method according to any one of claims 1 to 24 is implemented.

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