Data transmission method, communication apparatus and storage medium

Abstract

Provided in the present disclosure are a data transmission method, a communication apparatus and a storage medium. The data transmission method comprises: among P transmitting nodes, there being K transmitting nodes transmitting reference signals on the same M subcarriers in N time-domain symbols, wherein the frequency-domain spacing between two adjacent subcarriers among the M subcarriers is Q subcarriers, a reference signal transmitted by a kth transmitting node among the K transmitting nodes on an mth subcarrier of an nth time-domain symbol among the N time-domain symbols is formed by superimposing G(k) reference sub-signals, and the phase of a gth reference sub-signal among the G(k) reference sub-signals transmitted by the kth transmitting node on the mth subcarriers of two adjacent time-domain symbols differs by the same phase angle θ(g,k).

Description

Data transmission method, communication device and storage medium

[0001] This application claims priority to Chinese patent application No. 202410362802.0, filed on March 26, 2024, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present disclosure relates to the field of communication technology, and in particular to a data transmission method, a communication device, and a storage medium. Background Art

[0003] With the increasing popularity and application of fifth-generation mobile communication technology (5G), new radio (NR) technology has become a key component. In 5G NR, the cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) waveform has been widely used. Its excellent ability to resist multipath interference and inter-carrier interference effectively improves the performance of wireless communication systems.

[0004] However, transmitting perception signals on the time-frequency resources of the CP-OFDM waveform consumes time-frequency resources reserved for communication data. Especially in integrated synaesthesia scenarios, when multiple transmitting nodes need to transmit perception signals simultaneously, this consumes even more time-frequency resources that should be used for communication, significantly reducing spectral efficiency.

[0005] Therefore, how to enable the receiver to simultaneously monitor and perceive the wireless environment of multiple transmitting nodes without affecting the spectrum efficiency of communication has become an urgent problem to be solved in the current field of communication technology.

[0006] Summary of the Invention

[0007] The embodiments of the present disclosure provide a data transmission method, a communication device, and a storage medium, which help improve spectrum efficiency. The technical solutions provided by the embodiments of the present disclosure are as follows.

[0008] On the one hand, a data transmission method is provided, which includes: K transmitting nodes among P transmitting nodes transmit reference signals on the same M subcarriers in N time domain symbols; the frequency domain interval between two adjacent subcarriers among the M subcarriers is Q subcarriers, P and Q are positive integers, N and M are integers greater than 1, and K is a positive integer less than or equal to P. The reference signal transmitted by the kth transmitting node among K transmitting nodes on the mth subcarrier of the nth time domain symbol among N time domain symbols is composed of the superposition of G(k) sub-reference signals. The phases of the gth sub-reference signal among the G(k) sub-reference signals transmitted by the kth transmitting node on the mth subcarrier of two adjacent time domain symbols have the same phase angle θ(g,k), where k is the sequence number of the transmitting node among the K transmitting nodes and is a non-negative integer less than or equal to K, m is the sequence number of the subcarrier among the M subcarriers and is a non-negative integer less than or equal to M, n is the sequence number of the time domain symbol and is a non-negative integer less than or equal to N, G(k) is an integer greater than or equal to 2, and g is the sequence number of the sub-reference signal among the G(k) sub-reference signals and is a non-negative integer less than or equal to G(k).

[0009] On the other hand, a data transmission device is provided, which includes: a communication module for transmitting a reference signal on the same M subcarriers in N time domain symbols; the frequency domain interval between two adjacent subcarriers in the M subcarriers is Q subcarriers, P and Q are positive integers, N and M are integers greater than 1, and K is a positive integer less than or equal to P. The reference signal transmitted by the kth transmitting node among K transmitting nodes on the mth subcarrier of the nth time domain symbol among N time domain symbols is composed of the superposition of G(k) sub-reference signals. The phases of the gth sub-reference signal among the G(k) sub-reference signals transmitted by the kth transmitting node on the mth subcarrier of two adjacent time domain symbols have the same phase angle θ(g,k), where k is the sequence number of the transmitting node among the K transmitting nodes and is a non-negative integer less than or equal to K, m is the sequence number of the subcarrier among the M subcarriers and is a non-negative integer less than or equal to M, n is the sequence number of the time domain symbol and is a non-negative integer less than or equal to N, G(k) is an integer greater than or equal to 2, and g is the sequence number of the sub-reference signal among the G(k) sub-reference signals and is a non-negative integer less than or equal to G(k).

[0010] In another aspect, a communication device is provided, comprising: a memory and a processor. The memory is coupled to the processor; the memory is configured to store computer program instructions executable by the processor; and the processor implements the above-mentioned data transmission method when executing the computer program instructions.

[0011] On the other hand, a computer-readable storage medium is provided, on which computer program instructions are stored. When the computer program instructions are executed on a computer (such as a data transmission device or a communication device), the above-mentioned data transmission method is implemented.

[0012] In yet another aspect, a computer program product is provided, comprising computer program instructions, which implement the above-mentioned data transmission method when executed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] FIG1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure.

[0014] FIG2 is a flowchart of a data transmission method according to an embodiment of the present disclosure.

[0015] FIG3 is a schematic diagram of time-frequency resources according to an embodiment of the present disclosure.

[0016] FIG4 is a schematic diagram of another time-frequency resource according to an embodiment of the present disclosure.

[0017] FIG5 is a schematic structural diagram of a data transmission device according to an embodiment of the present disclosure.

[0018] FIG6 is a schematic structural diagram of a communication device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0019] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present disclosure.

[0020] In the description of the present disclosure, unless otherwise specified, " / " means "or". For example, A / B can mean A or B. "And / or" in this article is only used to describe the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: only A, only B, and A and B. In addition, "at least one" means one or more, and "a plurality" means two or more. Words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not limit them to be different.

[0021] It should be noted that, in this disclosure, words such as "exemplary" or "for example" are used to describe examples, illustrations, or explanations. Any embodiment or design described in this disclosure using words such as "exemplary" or "for example" should not be interpreted as being more preferred or advantageous than other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0022] With the popularization and application of 5G, NR technology has become a key component. In 5G NR, the CP-OFDM waveform has been widely used, effectively improving the performance of wireless communication systems with its excellent ability to resist multipath interference and inter-carrier interference.

[0023] However, transmitting perception signals on the time-frequency resources of the CP-OFDM waveform consumes time-frequency resources reserved for communication data. Especially in integrated synaesthesia scenarios, when multiple transmitting nodes need to transmit perception signals simultaneously, this consumes even more time-frequency resources that should be used for communication, significantly reducing spectral efficiency.

[0024] Therefore, how to enable the receiver to simultaneously monitor and perceive the wireless environment of multiple transmitting nodes without affecting the spectrum efficiency of communication has become an urgent problem to be solved in the current field of communication technology.

[0025] In view of this, the present disclosure proposes a data transmission method, in which K transmitting nodes among P transmitting nodes transmit reference signals on the same M subcarriers in N time domain symbols; the frequency domain interval between two adjacent subcarriers in the M subcarriers is Q subcarriers. The reference signal transmitted by the kth transmitting node among the K transmitting nodes on the mth subcarrier of the nth time domain symbol in N time domain symbols is composed of the superposition of G(k) sub-reference signals, and the phases of the gth sub-reference signal among the G(k) sub-reference signals transmitted by the kth transmitting node on the mth subcarrier of two adjacent time domain symbols differ by the same phase angle θ(g,k).

[0026] This allows some transmitting nodes to transmit multiple sub-reference signals in the Doppler domain on a resource block consisting of N time-domain symbols. Furthermore, the phase difference between the g-th sub-reference signal among the G(k) sub-reference signals transmitted by the k-th transmitting node on the m-th subcarrier of two adjacent time-domain symbols is the same, at a phase angle θ(g,k). This prevents mutual interference between signals and facilitates channel estimation. Furthermore, by adjusting the frequency-domain spacing Q between two adjacent subcarriers within the M subcarriers, the positions of the M subcarriers in the frequency domain can be flexibly configured, helping to improve spectral efficiency.

[0027] The data transmission method provided by the embodiments of the present disclosure can be applied to systems of various communication formats. For example, the data transmission method provided by the embodiments of the present disclosure can be applied to systems including, but not limited to, LTE systems, various versions based on LTE evolution, 5G systems, and other communication systems. In addition, the data transmission method provided by the embodiments of the present disclosure can also be applied to future-oriented communication systems (such as 6G communication systems).

[0028] The network architecture of the mobile communication network (including but not limited to 3G, 4G, 5G and future mobile communication networks) in the embodiment of the present disclosure may include at least a first communication node and a second communication node. It should be understood that in this example, in the downlink, the first communication node may be a network side device (for example, including but not limited to a base station), and the second communication node may be a terminal side device (for example, including but not limited to a terminal). Of course, in the uplink, the first communication node may also be a terminal side device, and the second communication node may also be a network side device. In the device-to-device communication between the two communication nodes, the first communication node and the second communication node may both be a base station or a terminal. The first communication node and the second communication node may be referred to as the first node and the second node, respectively.

[0029] For example, taking the first communication node as a terminal and the second communication node as a base station, FIG1 shows a communication system according to an embodiment of the present disclosure, which includes a terminal 10 and a base station 20. There can be one or more terminals 10 and base stations 20, and the number is not limited.

[0030] In some embodiments, base station 20 provides wireless access services to terminal 10. Base station 20 provides at least one service coverage area (also referred to as a cell). Terminal 10 entering this area can communicate with base station 20 via wireless signals to receive the wireless access services provided by base station 20.

[0031] In some embodiments, a base station (BS) may be a base station or an evolved base station (eNB or eNodeB) in long term evolution (LTE) or long term evolution advanced (LTEA), a base station device in a 5G network, or a base station in a future communication system. Base stations may include various network-side devices such as macro base stations, micro base stations, home base stations, wireless remote devices, reconfigurable intelligent surfaces (RISs), routers, relays, TRPs (transmission and reception points), and wireless fidelity (WIFI) devices.

[0032] In some embodiments, the terminal can be a device with wireless transceiver function. The terminal can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. The embodiments of the present disclosure do not limit the application scenarios. The terminal can sometimes also be referred to as a user, user equipment (UE), an access terminal, a UE unit, a UE station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a UE terminal, a wireless communication device, a UE agent or a UE device, etc., and the embodiments of the present disclosure do not limit this.

[0033] It should be noted that Figure 1 is only an exemplary framework diagram. The number of devices included in Figure 1 and the names of each device are not limited. In addition to the devices shown in Figure 1, the communication system may also include other devices, such as core network devices.

[0034] The application scenarios of the embodiments of the present disclosure are not limited. The system architecture and business scenarios described in the embodiments of the present disclosure are intended to more clearly illustrate the technical solutions of the embodiments of the present disclosure and do not constitute a limitation on the technical solutions provided by the embodiments of the present disclosure. It is known to those skilled in the art that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present disclosure are also applicable to similar technical problems.

[0035] The embodiment of the present disclosure provides a data transmission method. As shown in FIG2 , the method includes the following S101 : K transmitting nodes among P transmitting nodes transmit reference signals on the same M subcarriers in N time domain symbols.

[0036] The frequency domain spacing between two adjacent subcarriers among the M subcarriers is Q subcarriers, where P and Q are positive integers, N and M are integers greater than 1, and K is a positive integer less than or equal to P. In this way, by adjusting the frequency domain spacing Q between two adjacent subcarriers among the M subcarriers, the positions of the M subcarriers in the frequency domain can be flexibly configured, thereby adjusting the frequency domain resources occupied by the transmitted reference signal to adapt to different communication scenarios.

[0037] The reference signal transmitted by the kth transmitting node among K transmitting nodes on the mth subcarrier of the nth time domain symbol among N time domain symbols is composed of the superposition of G(k) subreference signals. The phases of the gth subreference signal among the G(k) subreference signals transmitted by the kth transmitting node on the mth subcarrier of two adjacent time domain symbols differ by the same phase angle θ(g,k). k is the sequence number of the transmitting node among the K transmitting nodes and is a non-negative integer less than or equal to K, m is the sequence number of the subcarrier among the M subcarriers and is a non-negative integer less than or equal to M, n is the sequence number of the time domain symbol and is a non-negative integer less than or equal to N, G(k) is an integer greater than or equal to 2, and g is the sequence number of the subreference signal among the G(k) subreference signals and is a non-negative integer less than or equal to G(k).

[0038] For example, k is a non-negative integer less than or equal to K (that is, k is 0, 1, 2, ..., K-1 or k is 1, 2, 3, ..., K), n is a non-negative integer less than or equal to N (that is, n is 0, 1, 2, ..., N-1 or n is 1, 2, 3, ..., N), m is a non-negative integer less than or equal to M (that is, m is 0, 1, 2, ...M-1 or m is 1, 2, 3, ...M), G(k) is an integer greater than or equal to 2, and g is a non-negative integer less than or equal to G(k) (that is, g is 0, 1, 2, ...G(k)-1 or g is 1, 2, 3, ...G(k)).

[0039] For example, as shown in Figure 3, there are eight transmitting nodes transmitting data signals and reference signals on a resource block consisting of 14 orthogonal frequency-division multiplexing (OFDM) symbols (i.e., OFDM symbols 0 to 7 in the figure), each OFDM symbol containing 8 RBs (96 subcarriers). Each transmitting node transmits a reference signal on the same eight subcarriers in each OFDM symbol, with the frequency domain spacing between two adjacent subcarriers in the eight subcarriers being 12 subcarriers. Each transmitting node transmits a reference signal on the first subcarrier of all RBs in the 14 OFDM symbols.

[0040] In some embodiments, Q is an integer multiple of the number of subcarriers contained in a resource block.

[0041] In some embodiments, the phase of the g-th sub-reference signal transmitted by the k-th transmitting node on the m-th subcarrier of the n-th time domain symbol among N time domain symbols is related to n.

[0042] In some embodiments, the phase of the g-th sub-reference signal transmitted by the k-th transmitting node on the m-th subcarrier of the n-th time domain symbol in N time domain symbols is monotonically increased with an interval of θ(g,k). Furthermore, when θ(g,k) is a positive value, the phase of the g-th sub-reference signal transmitted by the k-th transmitting node on the m-th subcarrier of the n-th time domain symbol in N time domain symbols is positively correlated with n; when θ(g,k) is a negative value, the phase of the g-th sub-reference signal transmitted by the k-th transmitting node on the m-th subcarrier of the n-th time domain symbol in N time domain symbols is negatively correlated with n. n is numbered according to the order of the time domain symbols.

[0043] In some embodiments, the reference signal transmitted by the kth transmitting node among the K transmitting nodes on the mth subcarrier of the nth time domain symbol among the N time domain symbols is X(k,m,n), then Here, R(k,m,g) is the g-th sub-reference signal transmitted by the k-th transmitting node on the m-th subcarrier of the first time domain symbol.

[0044] In this way, on a resource block consisting of N time domain symbols, for some transmitting nodes, multiple sub-reference signals can be transmitted in the Doppler domain, and these sub-reference signals are orthogonal to each other to avoid mutual interference between signals.

[0045] For example, with continued reference to FIG3 , the reference signal transmitted by the kth transmitting node of the first seven transmitting nodes (transmitting nodes 0 to 6) on the mth subcarrier of the nth OFDM symbol is: R(k,m,n)=exp(j*pi*k / 16)*exp(jnθ(g,k)), that is, each transmitting node transmits a different reference signal on the 0th OFDM symbol (that is, the first time domain symbol described above). θ(g,k)=2πk / 14, where k is the number of the transmitting node, and k is 0, 1, 2, ..., 6; m is the subcarrier number of the reference signal, and m is 0, 1, 2, ..., 7; and n is the OFDM symbol number, and n is 0, 1, 2, ..., 13.

[0046] The reference signal transmitted by the transmitting node 7 on the m-th subcarrier of the n-th OFDM symbol is:

[0047] Wherein, θ(g,k)=2π(g+7) / 14, g is the sub-reference signal number actually transmitted by transmitting node 7 (mapped in the Doppler delay domain), and g is a non-negative integer less than 7; m is the subcarrier number of the reference signal, and m is 0, 1, 2, ..., 7; n is the OFDM symbol number, and n is 0, 1, 2, ..., 13.

[0048] In some embodiments, different transmitting nodes among the K transmitting nodes may have different or the same G(k) values. In this way, different transmitting nodes may transmit different numbers of sub-reference signals in the Doppler delay domain, which provides flexibility.

[0049] In some embodiments, different transmitting nodes among the K transmitting nodes have different phase angles θ(g,k) for transmitting different sub-reference signals. By setting different phase angles for transmitting different sub-reference signals on time-frequency resources by different transmitting nodes, the sub-reference signals mapped in the Doppler domain can be dispersed on different Doppler grids, i.e., mutually orthogonal.

[0050] In some embodiments, different sub-reference signals transmitted by different transmitting nodes among the K transmitting nodes have different phase angles θ(g, k), including: the phase angles θ(g, k) transmitted by different sub-reference signals by different transmitting nodes are each an element in a phase angle set. The phase angle set includes at least H different elements, and the H different elements all satisfy the formula θ(g, k) = 2πhB / N, where h is a non-negative integer and less than the difference between N / B rounded down and 1, B is a positive integer and a system configuration parameter, H is the sum of G(k) values ​​corresponding to different transmitting nodes among the K transmitting nodes, and N is greater than or equal to B*H.

[0051] The difference between N / B rounded down and 1 can also be expressed as floor(N / B)-1, where floor() means rounding down.

[0052] In some embodiments, different sub-reference signals transmitted by different transmitting nodes among the K transmitting nodes have different phase angles θ(g, k), including: the phase angles θ(g, k) transmitted by different sub-reference signals by different transmitting nodes are each an element of a phase angle set. The phase angle set includes N different elements, each of the N different elements satisfying the formula θ(g, k) = 2πi / N, where i is a non-negative integer less than N-1, N is greater than or equal to H, and H is the sum of G(k) values ​​corresponding to different transmitting nodes among the K transmitting nodes.

[0053] In some embodiments, the P transmitting nodes include at least one of the following: a terminal, a base station, and an application device (also referred to as a fixed transceiver device).

[0054] Exemplarily, the P transmitting nodes are P terminals, or the P transmitting nodes are P base stations, or the P transmitting nodes include application devices, such as one of the following: a router, customer premises equipment (CPE), a relay node, or a switch.

[0055] In some embodiments, K transmitting nodes transmit reference signals on the same M subcarriers in N time domain symbols, including: the M subcarriers have the same frequency domain positions on the N time domain symbols; and K transmitting nodes transmit reference signals on the same N*M subcarrier resources.

[0056] In this way, on the one hand, the positions of the M subcarriers in the N time domain symbols are the same, which means that the reference signal occupies the same subcarrier position in different time domain symbols, which helps the receiving end to receive and process the reference signal; on the other hand, the K transmitting nodes transmit the reference signal on the same N*M subcarrier resources, without occupying other subcarrier resources to transmit the reference signal, which is conducive to improving spectrum efficiency.

[0057] In some embodiments, the intervals between two adjacent time domain symbols in the N time domain symbols are the same.

[0058] In some embodiments, the N time-domain symbols are continuous in the time domain.

[0059] Exemplarily, with continued reference to FIG3 , eight transmitting nodes transmit reference signals on the same eight subcarriers over 14 consecutive time-domain symbols.

[0060] In some embodiments, there is one subcarrier in each resource block in N time domain symbols to transmit a reference signal.

[0061] Exemplarily, continuing to refer to Figure 3, each of the 8 transmitting nodes transmits a reference signal on the same 8 subcarriers in each of the 14 OFDM symbols, the frequency domain interval between two adjacent subcarriers in the 8 subcarriers is 12 subcarriers, and the first subcarrier in each resource block in the 14 OFDM symbols transmits a reference signal.

[0062] In some embodiments, the intervals between two adjacent subcarriers in the M subcarriers are the same.

[0063] Exemplarily, continuing to refer to FIG3 , each of the eight transmitting nodes transmits a reference signal on the same eight subcarriers in each of the 14 OFDM symbols, and the frequency domain interval between two adjacent subcarriers in the eight subcarriers is 12 subcarriers.

[0064] In some embodiments, the M subcarriers are continuous in the frequency domain.

[0065] For example, assuming that M consecutive subcarriers in the frequency domain are named as the 0th subcarrier, the 1st subcarrier, ... the M-1th subcarrier, in sequence, when two subcarriers are consecutive in the frequency domain, the sequence numbers between the two subcarriers differ by 1 (for example, the 1st subcarrier and the 2nd subcarrier are consecutive subcarriers in the frequency domain, and the sequence numbers between the 1st subcarrier and the 2nd subcarrier differ by 1). Based on this, it can be concluded that if the sequence numbers between two adjacent subcarriers in the frequency domain among the M subcarriers differ by 1, then the M subcarriers are continuous in the frequency domain.

[0066] In some embodiments, different transmitting nodes among the K transmitting nodes transmit different reference signals on the same time domain symbol.

[0067] In some embodiments, the reference signal transmitted by the same transmitting node among the K transmitting nodes on the M subcarriers of the same time domain symbol is the same. This can be understood as the reference signal transmitted by the same transmitting node among the K transmitting nodes on the M subcarriers of the same time domain symbol being irrelevant to the value of m.

[0068] For example, the reference signal transmitted by the kth transmitting node among the K transmitting nodes on the M subcarriers on the nth time domain symbol can be expressed as:

[0069] In some embodiments, the modulus values ​​of the reference signal transmitted by the same transmitting node among the K transmitting nodes in different time domain symbols are different or the same.

[0070] In some embodiments, modulus values ​​of reference signals transmitted by the same transmitting node in different time domain symbols among the K transmitting nodes are partially the same.

[0071] The modulus value may also have other names, such as amplitude, which is not limited in the present disclosure.

[0072] In some embodiments, the P transmitting nodes transmit other signals on subcarriers other than the M subcarriers in the N time-domain symbols. The other signals may include at least one of the following: a data signal, a reference signal of the same type as the reference signal, or a reference signal of a different type than the reference signal.

[0073] In some embodiments, different transmitting nodes among the P transmitting nodes transmit other signals on different frequency domain resources of the N time domain symbols, thereby reducing interference between other signals transmitted when multiple transmitting nodes transmit signals.

[0074] For example, referring again to Figure 3, each of the eight transmitting nodes transmits a reference signal on the first subcarrier of all resource blocks (RBs). The data signals of the eight transmitting nodes (which may also include other reference signals) are mapped to the last 11 subcarriers within each RB. From bottom to top, the eight RBs correspond to eight transmitting nodes. That is, within this resource block, each of the eight transmitting nodes transmits 8*14 reference signals at the same time-frequency location, while different transmitting nodes within the eight transmitting nodes transmit 11*14 data signals at different time-frequency locations.

[0075] In some embodiments, one of the P transmitting nodes transmits other signals on different frequency domain resources of the N time domain symbols. In this way, when the transmitting node needs to transmit a large number of other signals, it can occupy multiple frequency domain resources of the N time domain symbols to transmit the other signals.

[0076] In some embodiments, a frequency domain resource bandwidth used by each of the P transmitting nodes to transmit other signals is smaller than a frequency domain interval between a first subcarrier and a last subcarrier among the M subcarriers.

[0077] In some embodiments, the power of the reference signal is greater than or equal to the power of the other signals.

[0078] For example, when the other signal is another signal, the power of the reference signal is greater than the power of the data signal.

[0079] In some embodiments, the other transmitting nodes except the K transmitting nodes among the P transmitting nodes transmit reference signals on the same M subcarriers in the N time-domain symbols.

[0080] In some embodiments, K transmitting nodes transmit signals other than the reference signal superimposed on the same M subcarriers within N time-domain symbols. The phase angles of the other signals differ from those of the K transmitting nodes. The other signals may include at least one of the following: a data signal or a reference signal of a different type than the reference signal. This allows data to be transmitted in the Doppler domain at unused locations other than the reference signal, thereby improving spectrum resource utilization.

[0081] For example, continuing to refer to Figure 3, there are 8 transmitting nodes (the transmitting nodes can be any combination of terminals, base stations or application devices) transmitting data signals and reference signals on a resource block consisting of 14 OFDM symbols, each OFDM symbol containing 8 RBs (96 subcarriers).

[0082] Each transmitting node transmits a reference signal on the same eight subcarriers in each OFDM symbol, with the frequency domain spacing between two adjacent subcarriers within the eight subcarriers being 12 subcarriers. Each transmitting node transmits a reference signal on the zeroth subcarrier (i.e., the first subcarrier) of all resource blocks (RBs). The data signals of the eight transmitting nodes (which may also include other reference signals) are mapped to the last 11 subcarriers within each RB, with each of the eight RBs from bottom to top corresponding to eight transmitting nodes. That is, in this resource block, each of the eight transmitting nodes transmits 8*14 reference signals at the same time-frequency location, and different of the eight transmitting nodes transmit 11*14 data signals at different time-frequency locations.

[0083] The reference signal transmitted by the kth transmitting node of the first five transmitting nodes (transmitting nodes 0 to 4) on the mth subcarrier of the nth OFDM symbol is: R(k,m,n) = 1*exp(jnθ(g,k)). That is, each of the first five transmitting nodes transmits the same reference signal on the eight subcarriers of the zeroth OFDM symbol (the first time-domain symbol described above). θ(g,k) = 2πk / 14, where k is the transmitting node number and ranges from 0, 1, 2, ..., 4; m is the reference signal subcarrier number and ranges from 0, 1, 2, ..., 7; and n is the OFDM symbol number and ranges from 0, 1, 2, ..., 13.

[0084] The reference signal transmitted by transmitting node 5, transmitting node 6, and transmitting node 7 on the m-th subcarrier of the n-th OFDM symbol is:

[0085] Wherein, θ(g,k)=2π(3k'-10+g) / 14, g is the sub-reference signal number actually transmitted by each transmitting node (mapped to the Doppler delay domain), and g is 0, 1, 2; k' is the transmitting node number, and k' is 5, 6, 7; m is the subcarrier number of the reference signal, and m is 0, 1, 2, ..., 7; n is the OFDM symbol number, and n is 0, 1, 2, ..., 13.

[0086] For example, continuing to refer to Figure 3, there are 7 transmitting nodes (transmitting node 0 to transmitting node 6) (the transmitting node can be any combination of terminals, base stations or application devices) transmitting data signals and reference signals on a resource block consisting of 14 OFDM symbols, each OFDM symbol containing 8 RBs (96 subcarriers)).

[0087] Each transmitting node transmits a reference signal on the same eight subcarriers in each OFDM symbol. The frequency domain spacing between adjacent subcarriers within the eight subcarriers is 12 subcarriers. Each transmitting node transmits a reference signal on the 0th subcarrier (i.e., the first subcarrier) of all resource blocks (RBs). The data signals (which may also include other reference signals) of the first six transmitting nodes (i.e., transmitting nodes 0 through 5 in the figure) are mapped to the last 11 subcarriers within the first six RBs (RBs 0 through 5). The data signal of transmitting node 6 (which may also include other reference signals) is mapped to the 22 subcarriers within the last two RBs (RBs 6 and 7). Each of the eight RBs from bottom to top corresponds to seven transmitting nodes. That is, within this resource block, each of the seven transmitting nodes transmits 8*14 reference signals at the same time-frequency location. Different transmitting nodes within the first six transmitting nodes transmit 11*14 data signals at different time-frequency locations. Transmitting node 6 transmits 22*14 data signals.

[0088] The reference signal transmitted by the kth transmitting node on the mth subcarrier of the nth OFDM symbol is:

[0089] Wherein, θ(g,k)=2π(2k+g) / 14, g is the sub-reference signal number actually transmitted by each transmitting node (mapped in the Doppler delay domain), and g is 0 or 1; k is the transmitting node number, and k is 0, 1, 2, ..., 6; m is the subcarrier number of the reference signal, and m is 0, 1, 2, ..., 7; n is the OFDM symbol number, and n is 0, 1, 2, ..., 13.

[0090] For example, continuing to refer to Figure 3, there are 8 transmitting nodes (transmitting node 0 to transmitting node 7) (the transmitting node can be any combination of terminals, base stations or application devices) transmitting data signals and reference signals on a resource block consisting of 14 OFDM symbols, each OFDM symbol containing 8 RBs (96 subcarriers)).

[0091] Each transmitting node transmits a reference signal on the same 8 subcarriers in each OFDM symbol, and the frequency domain interval between two adjacent subcarriers in the 8 subcarriers is 12 subcarriers. Each transmitting node transmits a reference signal on the 0th subcarrier of all RBs; the data signals of the 8 transmitting nodes (which may also include other reference signals) are mapped to the last 11 subcarriers in each RB. The 8 RBs from bottom to top correspond to 8 transmitting nodes, and transmitting node 7 superimposes the transmitted data signal on the 0th subcarrier of all RBs. That is, in this resource block, each transmitting node transmits 8*14 reference signals at the same time-frequency position and 11*14 data signals at different time-frequency positions. Transmitting node 7 transmits an additional 5 data signals in different Doppler delay domains.

[0092] The reference signal transmitted by the kth transmitting node of the first 7 transmitting nodes (transmitting node 0 to transmitting node 6) on the mth subcarrier of the nth OFDM symbol is: R(k,m,n)=1*exp(jnθ(g,k)), that is, each of the first 7 transmitting nodes transmits the same reference signal on the 8 subcarriers on the 0th OFDM symbol (that is, the first time domain symbol described above), where θ(g,k)=2πk / 14, k is the transmitting node number, and k is 0, 1, 2, ..., 6; m is the subcarrier number of the reference signal, and m is 0, 1, 2, ..., 7; n is the OFDM symbol number, and n is 0, 1, 2, ..., 13.

[0093] The reference signal transmitted by the transmitting node 7 on the m-th subcarrier of the n-th OFDM symbol is:

[0094] Wherein, θ(g,k)=2π(g+7) / 14, g is the sub-reference signal number actually transmitted by the transmitting node (mapped in the Doppler delay domain), and g is 0 or 1; m is the subcarrier number of the reference signal, and m is 0, 1, 2, ..., 7; n is the OFDM symbol number, and n is 0, 1, 2, ..., 13.

[0095] The transmitting node 7 superimposes a transmission data signal on the m-th subcarrier of the n-th OFDM symbol, and the phase angle of the data signal is different from the phase angles of all transmitting nodes.

[0096] For example, continuing to refer to Figure 3, there are 8 transmitting nodes (transmitting node 0 to transmitting node 7) (the transmitting node can be any combination of terminals, base stations or application devices) transmitting data signals and reference signals on a resource block consisting of 14 OFDM symbols, each OFDM symbol containing 8 RBs (96 subcarriers)).

[0097] Each of the eight transmitting nodes transmits a reference signal on the same eight subcarriers in each OFDM symbol, with the frequency domain spacing between two adjacent subcarriers in the eight subcarriers being 12 subcarriers. Each transmitting node transmits a reference signal on the 0th subcarrier (i.e., the first subcarrier) of all RBs. The data signals of the eight transmitting nodes (which may also include other reference signals) are mapped to the last 11 subcarriers within each RB, with each of the eight RBs from bottom to top corresponding to eight transmitting nodes. That is, on this resource block, each of the eight transmitting nodes transmits 8*14 reference signals at the same time-frequency location, and different of the eight transmitting nodes transmit 11*14 data signals at different time-frequency locations.

[0098] The reference signal transmitted by the kth transmitting node of the first seven transmitting nodes (transmitting nodes 0 to 6) on the mth subcarrier of the nth OFDM symbol is: R(k,m,n) = exp(j*pi*k / 16)*exp(jnθ(g,k)). That is, each transmitting node transmits a different reference signal in the 0th OFDM symbol. θ(g,k) = 2πk / 14, where k is the transmitting node number and ranges from 0, 1, 2, ..., 6; m is the reference signal subcarrier number and ranges from 0, 1, 2, ..., 7; and n is the OFDM symbol number and ranges from 0, 1, 2, ..., 13.

[0099] The reference signal transmitted by the transmitting node 7 on the m-th subcarrier of the n-th OFDM symbol is:

[0100] Here, θ(g,k) = 2π(g+7) / 14, where g is the sub-reference signal number actually transmitted by the transmitting node (mapped into the Doppler delay domain) and is 0, 1, 2, ..., 6; m is the subcarrier number of the reference signal and is 0, 1, 2, ..., 7; and n is the OFDM symbol number and is 0, 1, 2, ..., 13. That is, transmitting node 7 has seven reference signals mapped into the Doppler delay domain, and their Doppler domain positions and delay domain positions are different.

[0101] Exemplarily, as shown in FIG4 , there are 8 transmitting nodes (the transmitting nodes may be any combination of terminals, base stations or application devices) transmitting data signals and reference signals on a resource block consisting of 28 OFDM symbols, each OFDM symbol containing 8 RBs (96 subcarriers).

[0102] Each transmitting node transmits a reference signal on the same eight subcarriers in every other OFDM symbol, with the frequency domain spacing between adjacent subcarriers within the eight subcarriers being 12 subcarriers. In OFDM symbols at odd symbol positions (i.e., OFDM symbols 0, 2, 4, ..., 26 in the figure), each transmitting node transmits a reference signal on subcarrier 0 (the first subcarrier) across all RBs. The data signals of the eight transmitting nodes are mapped onto the remaining 11 subcarriers within each RB, with each of the eight RBs from bottom to top corresponding to eight transmitting nodes. In OFDM symbols at even symbol positions (i.e., OFDM symbols 1, 3, 5, ..., 27 in the figure), the data signals of the eight transmitting nodes are mapped onto all subcarriers within each RB. That is, on this resource block, each of the eight transmitting nodes transmits 8*14 reference signals at the same time-frequency position, and different transmitting nodes among the eight transmitting nodes transmit 23*14 data signals at different time-frequency positions.

[0103] The reference signal transmitted by the kth transmitting node of the first seven transmitting nodes (transmitting nodes 0 to 6) on the mth subcarrier of the nth OFDM symbol (the OFDM symbol transmitting the reference signal) is: R(k,m,n) = exp(j*pi*k / 16)*exp(jnθ(g,k)). That is, each transmitting node transmits a different reference signal in the 0th OFDM symbol. θ(g,k) = 2πk / 14, where k is the transmitting node number and ranges from 0, 1, 2, ..., 6; m is the reference signal subcarrier number and ranges from 0, 1, 2, ..., 7; and n is the OFDM symbol number and ranges from 0, 1, 2, ..., 13.

[0104] The reference signal transmitted by the transmitting node 7 on the mth subcarrier of the nth OFDM symbol (the OFDM symbol for transmitting the reference signal) is:

[0105] Wherein, θ(g,k)=2π(g+7) / 14, g is the sub-reference signal number actually transmitted by the transmitting node (mapped in the Doppler delay domain), and g is 0, 1, 2, ..., 6; m is the subcarrier number of the reference signal, and m is 0, 1, 2, ..., 7; n is the OFDM symbol number, and n is 0, 1, 2, ..., 13.

[0106] Based on this, on a resource block consisting of N time domain symbols, for some transmitting nodes, multiple reference signals can be transmitted in the Doppler domain, and the phase difference of the g-th sub-reference signal among the G(k) sub-reference signals transmitted by the k-th transmitting node on the m-th sub-carrier of two adjacent time domain symbols is the same as the phase angle θ(g,k), avoiding mutual interference between signals and facilitating channel estimation. At the same time, by adjusting the frequency domain interval Q between two adjacent sub-carriers in the M sub-carriers, the position of the M sub-carriers in the frequency domain can be flexibly configured. In addition, different transmitting nodes transmit different reference signals at different phase angles, so that the reference signals mapped in the Doppler domain can be dispersed on different Doppler grids, further enhancing orthogonality and reducing interference, which helps to improve spectrum efficiency.

[0107] The above mainly introduces the solutions of the embodiments of the present disclosure from the perspective of methods. The following also shows a data transmission device, which is used to execute the data transmission method in any of the above embodiments and their implementations.

[0108] It is understandable that, in order to implement the data transmission method, the data transmission device includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the algorithm steps of each example described in the embodiments of the present disclosure, the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in a hardware or computer software driven hardware manner depends on the preset application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each preset application, but such implementation should not be considered to be beyond the scope of the present disclosure.

[0109] The embodiments of the present disclosure can divide the data transmission device into functional modules according to the above-mentioned method embodiments. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one functional module. The above-mentioned integrated modules can be implemented in the form of hardware or software. It should be noted that the division of modules in the embodiments of the present disclosure is schematic and is only a logical function division. There may be other division methods in actual implementation. The following is an example of dividing each functional module corresponding to each function.

[0110] FIG5 is a schematic diagram of the structure of a data transmission device according to an embodiment of the present disclosure. The data transmission device 200 includes: a processing module 201 and a communication module 202 .

[0111] The processing module 201 is configured to determine whether there are K transmitting nodes among the P transmitting nodes transmitting reference signal data on the same M subcarriers in N time domain symbols.

[0112] Communication module 202 is configured to transmit reference signals on the same M subcarriers in N time domain symbols, where K of the P transmitting nodes transmit reference signals on the same M subcarriers in N time domain symbols. The frequency domain spacing between two adjacent subcarriers in the M subcarriers is Q subcarriers, where P and Q are positive integers, N and M are integers greater than 1, and K is a positive integer less than or equal to P.

[0113] The reference signal transmitted by the kth transmitting node among the K transmitting nodes on the mth subcarrier of the nth time domain symbol among the N time domain symbols is composed of the superposition of G(k) subreference signals, and the phases of the gth subreference signal among the G(k) subreference signals transmitted by the kth transmitting node on the mth subcarrier of two adjacent time domain symbols have the same phase angle θ(g,k); k is the sequence number of the transmitting node among the K transmitting nodes and is a non-negative integer less than or equal to K, m is the sequence number of the subcarrier among the M subcarriers and is a non-negative integer less than or equal to M, n is the sequence number of the time domain symbol and is a non-negative integer less than or equal to N, G(k) is an integer greater than or equal to 2, and g is the sequence number of the subreference signal among the G(k) subreference signals and is a non-negative integer less than or equal to G(k).

[0114] In some embodiments, the reference signal transmitted by the kth transmitting node among the K transmitting nodes on the mth subcarrier of the nth time domain symbol among the N time domain symbols is X(k,m,n), then Here, R(k,m,g) is the g-th sub-reference signal transmitted by the k-th transmitting node on the m-th subcarrier of the first time domain symbol.

[0115] In some embodiments, the phase of the g-th sub-reference signal transmitted by the k-th transmitting node on the m-th subcarrier of the n-th time domain symbol in N time domain symbols is positively correlated with n.

[0116] In some embodiments, different transmitting nodes among the K transmitting nodes use different phase angles θ(g,k) for transmitting different sub-reference signals.

[0117] In some embodiments, different sub-reference signals transmitted by different transmitting nodes among the K transmitting nodes have different phase angles θ(g, k), including: the phase angles θ(g, k) transmitted by different sub-reference signals by different transmitting nodes are each an element in a phase angle set. The phase angle set includes at least H different elements, and the H different elements all satisfy the formula θ(g, k) = 2πhB / N, where h is a non-negative integer and less than the difference between N / B rounded down and 1, B is a positive integer and a system configuration parameter, H is the sum of G(K) values ​​corresponding to different transmitting nodes among the K transmitting nodes, and N is greater than or equal to B*H.

[0118] In some embodiments, different sub-reference signals transmitted by different transmitting nodes among the K transmitting nodes have different phase angles θ(g, k), including: the phase angles θ(g, k) transmitted by different sub-reference signals by different transmitting nodes are each an element of a phase angle set. The phase angle set includes N different elements, each of the N different elements satisfying the formula θ(g, k) = 2πi / N, where i is a non-negative integer less than N-1, N is greater than or equal to H, and H is the sum of G(k) values ​​corresponding to different transmitting nodes among the K transmitting nodes.

[0119] In some embodiments, different transmitting nodes among the K transmitting nodes correspond to different or the same G(K) values.

[0120] In some embodiments, the P transmitting nodes include at least one of the following: a terminal, a base station, and an application device.

[0121] In some embodiments, K transmitting nodes transmit reference signals on the same M subcarriers in N time domain symbols, including: the M subcarriers have the same frequency domain positions on the N time domain symbols; and K transmitting nodes transmit reference signals on the same N*M subcarrier resources.

[0122] In some embodiments, the intervals between two adjacent time domain symbols in the N time domain symbols are the same.

[0123] In some embodiments, the N time-domain symbols are continuous in the time domain.

[0124] In some embodiments, the intervals between two adjacent subcarriers in the M subcarriers are the same.

[0125] In some embodiments, there is one subcarrier in each resource block in N time domain symbols to transmit a reference signal.

[0126] In some embodiments, the M subcarriers are continuous in the frequency domain.

[0127] In some embodiments, Q is an integer multiple of the number of subcarriers contained in a resource block.

[0128] In some embodiments, different transmitting nodes among the K transmitting nodes transmit different reference signals on the same time domain symbol.

[0129] In some embodiments, the reference signals transmitted by the same transmitting node among the K transmitting nodes on the M subcarriers of the same time domain symbol are the same.

[0130] In some embodiments, the modulus values ​​of the reference signal transmitted by the same transmitting node among the K transmitting nodes in different time domain symbols are different or the same.

[0131] In some embodiments, modulus values ​​of reference signals transmitted by the same transmitting node in different time domain symbols among the K transmitting nodes may be partially identical.

[0132] In some embodiments, the communication module 202 is configured to enable the P transmitting nodes to transmit other signals on subcarriers other than the M subcarriers on N time domain symbols.

[0133] In some embodiments, the communication module 202 is configured to enable one of the P transmitting nodes to transmit other signals on different frequency domain resources of N time domain symbols.

[0134] In some embodiments, the communication module 202 is configured to enable different transmitting nodes among the P transmitting nodes to transmit other signals on different frequency domain resources of N time domain symbols.

[0135] In some embodiments, a frequency domain resource bandwidth used by each of the P transmitting nodes to transmit other signals is smaller than a frequency domain interval between a first subcarrier and a last subcarrier among the M subcarriers.

[0136] In some embodiments, the power of the reference signal is greater than or equal to the power of the other signals.

[0137] In some embodiments, the communication module 202 is configured to enable other transmitting nodes except the K transmitting nodes among the P transmitting nodes to transmit reference signals on the same M subcarriers in the N time domain symbols.

[0138] In some embodiments, the communication module 202 is configured for K transmitting nodes to transmit other signals except the reference signal on the same M subcarriers in N time domain symbols, and the phase angles of the other signals are different from the phase angles of the K transmitting nodes.

[0139] In the case of implementing the functions of the above-mentioned integrated modules in hardware, the embodiments of the present disclosure also provide a structure of a communication device for executing the data transmission method provided in the embodiments of the present disclosure. As shown in Figure 6, the communication device 300 includes: a communication interface 303, a processor 302, and a bus 304. In some embodiments, the communication device may also include a memory 301.

[0140] The processor 302 may implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the embodiments of the present disclosure. The processor 302 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array, or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof, and may implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the embodiments of the present disclosure. The processor 302 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP (digital signal processor) and a microprocessor, and the like.

[0141] The communication interface 303 is used to connect to other devices via a communication network, such as Ethernet, wireless access network, or wireless local area network (WLAN).

[0142] The memory 301 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0143] As an implementation, the memory 301 may exist independently of the processor 302. The memory 301 may be connected to the processor 302 via a bus 304 and used to store instructions or program codes. When the processor 302 calls and executes the instructions or program codes stored in the memory 301, the data transmission method provided in the embodiment of the present disclosure can be implemented.

[0144] In another implementation, the memory 301 may also be integrated with the processor 302 .

[0145] Bus 304 can be an Extended Industry Standard Architecture (EISA) bus, etc. Bus 304 can be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, FIG6 shows only one thick line, but this does not mean that there is only one bus or only one type of bus.

[0146] Some embodiments of the present disclosure provide a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium) having computer program instructions stored therein. When the computer program instructions are executed on a computer, the computer executes the data transmission method described in any of the above embodiments.

[0147] In an exemplary embodiment, the computer may be the aforementioned communication device, and the present disclosure does not limit the specific form of the computer.

[0148] In some examples, the computer-readable storage media described above may include, but are not limited to, magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes), optical disks (e.g., compact disks (CDs), digital versatile disks (DVDs), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROM), cards, sticks, or key drives, etc.). The various computer-readable storage media described in this disclosure may represent one or more devices and / or other machine-readable storage media for storing information. The term "machine-readable storage medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0149] An embodiment of the present disclosure provides a computer program product comprising instructions. When the computer program product is run on a computer, the computer is enabled to execute the data transmission method described in any one of the above embodiments.

[0150] In the technical solution provided by the embodiment of the present disclosure, there are K transmitting nodes among the P transmitting nodes that transmit reference signals on the same M subcarriers in N time domain symbols, and the frequency domain interval between two adjacent subcarriers in the M subcarriers is Q subcarriers. The reference signal transmitted by the kth transmitting node among the K transmitting nodes on the mth subcarrier of the nth time domain symbol in the N time domain symbols is composed of the superposition of G(k) subreference signals. In this way, on the resource block composed of N time domain symbols, for some transmitting nodes, multiple subreference signals can be transmitted in the Doppler domain, and the phases of the gth subreference signal among the G(k) subreference signals transmitted by the kth transmitting node on the mth subcarrier of two adjacent time domain symbols have the same phase angle θ(g,k), which avoids mutual interference between the reference signals and is conducive to channel estimation. At the same time, by adjusting the frequency domain interval Q between two adjacent subcarriers in the M subcarriers, the positions of the M subcarriers in the frequency domain can be flexibly configured, which is conducive to improving spectrum efficiency.

[0151] The above is only a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or replacements within the technical scope disclosed in the present disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A data transmission method, comprising: There are K transmitting nodes among the P transmitting nodes transmitting reference signals on the same M subcarriers in N time domain symbols; The frequency domain interval between two adjacent subcarriers in the M subcarriers is Q subcarriers, P and Q are positive integers, N and M are integers greater than 1, and K is a positive integer less than or equal to P; The reference signal transmitted by the kth transmitting node among the K transmitting nodes on the mth subcarrier of the nth time domain symbol among the N time domain symbols is composed of G(k) sub-reference signals superimposed, and the phases of the gth sub-reference signal among the G(k) sub-reference signals transmitted by the kth transmitting node on the mth subcarrier of two adjacent time domain symbols differ by the same phase angle θ(g,k); k is the sequence number of the transmitting node among the K transmitting nodes and is a non-negative integer less than or equal to K, m is the sequence number of the subcarrier among the M subcarriers and is a non-negative integer less than or equal to M, n is the sequence number of the time domain symbol and is a non-negative integer less than or equal to N, G(k) is an integer greater than or equal to 2, and g is the sequence number of the sub-reference signal among the G(k) sub-reference signals and is a non-negative integer less than or equal to G(k).

2. The method according to claim 1, wherein The reference signal transmitted by the kth transmitting node among the K transmitting nodes on the mth subcarrier of the nth time domain symbol among the N time domain symbols is X(k,m,n), then Here, R(k,m,g) is the g-th sub-reference signal transmitted by the k-th transmitting node on the m-th subcarrier of the first time domain symbol.

3. The method according to claim 1, wherein The phase of the g-th sub-reference signal transmitted by the k-th transmitting node on the m-th subcarrier of the n-th time domain symbol in the N time domain symbols is positively correlated with n.

4. The method according to claim 1, wherein Different transmitting nodes among the K transmitting nodes use different phase angles θ(g, k) for transmitting different sub-reference signals.

5. The method according to claim 4, wherein The phase angles θ(g, k) of different sub-reference signals transmitted by different transmitting nodes among the K transmitting nodes are different, including: the phase angles θ(g, k) of different sub-reference signals transmitted by different transmitting nodes are respectively an element in a phase angle set, the phase angle set includes at least H different elements, and the H different elements all satisfy the formula θ(g, k) = 2πhB / N, where h is a non-negative integer and is less than the difference between N / B rounded down and 1, B is a positive integer and is a system configuration parameter, H is the sum of G(k) values ​​corresponding to different transmitting nodes among the K transmitting nodes, and N is greater than or equal to B*H.

6. The method according to claim 4, wherein: The phase angles θ(g, k) at which different sub-reference signals are transmitted by different transmitting nodes among the K transmitting nodes are different, including: the phase angles θ(g, k) at which different transmitting nodes transmit different sub-reference signals are each an element in a phase angle set, the phase angle set includes N different elements, and the N different elements all satisfy the formula θ(g, k) = 2πi / N, where i is a non-negative integer less than N-1, N is greater than or equal to H, and H is the sum of G(k) values ​​corresponding to different transmitting nodes among the K transmitting nodes.

7. The method according to claim 1, wherein The G(k) values ​​corresponding to different transmitting nodes among the K transmitting nodes are different or the same.

8. The method according to claim 1, wherein The P transmitting nodes include at least one of the following: a terminal, a base station, and an application device.

9. The method according to claim 1, wherein The K transmitting nodes transmit reference signals on the same M subcarriers in N time domain symbols, including: The M subcarriers have the same frequency domain positions on the N time domain symbols; The K transmitting nodes transmit the reference signals on the same N*M subcarrier resources.

10. The method according to claim 1, wherein The intervals between two adjacent time domain symbols in the N time domain symbols are the same.

11. The method according to claim 1, wherein The N time-domain symbols are continuous in the time domain.

12. The method according to claim 1, wherein The intervals between two adjacent subcarriers in the M subcarriers are the same.

13. The method according to claim 1, wherein There is one subcarrier in each resource block in the N time domain symbols for transmitting the reference signal.

14. The method according to claim 1, wherein The M subcarriers are continuous in the frequency domain.

15. The method according to claim 1, wherein The Q is an integer multiple of the number of subcarriers included in a resource block.

16. The method according to claim 1, wherein Different transmitting nodes among the K transmitting nodes transmit different reference signals on the same time domain symbol.

17. The method according to claim 1, wherein The reference signals transmitted by the same transmitting node among the K transmitting nodes on the M subcarriers of the same time domain symbol are the same.

18. The method according to claim 1, wherein The modulus values ​​of the reference signal transmitted by the same transmitting node among the K transmitting nodes on different time domain symbols are different or the same.

19. The method according to claim 1, wherein Among the K transmitting nodes, modulus values ​​of reference signals transmitted by the same transmitting node at different time domain symbols are partially the same.

20. The method according to claim 1, wherein The P transmitting nodes transmit other signals on other subcarriers except the M subcarriers on the N time domain symbols.

21. The method according to claim 20, wherein There is one transmitting node among the P transmitting nodes that transmits the other signal on different frequency domain resources of the N time domain symbols.

22. The method according to claim 20, wherein Different transmitting nodes among the P transmitting nodes transmit the other signals on different frequency domain resources of the N time domain symbols.

23. The method according to claim 20, wherein The frequency domain resource bandwidth used by each of the P transmitting nodes to transmit the other signal is smaller than the frequency domain interval between the first subcarrier and the last subcarrier of the M subcarriers.

24. The method according to claim 20, wherein The power of the reference signal is greater than or equal to the power of the other signals.

25. The method according to claim 1, wherein The other transmitting nodes among the P transmitting nodes except the K transmitting nodes transmit reference signals on the same M subcarriers in the N time domain symbols.

26. The method according to claim 1, wherein The K transmitting nodes transmit other signals except the reference signal on the same M subcarriers in the N time domain symbols, and the phase angles of the other signals are different from the phase angles of the K transmitting nodes.

27. A communication device comprising: A memory and a processor; wherein the memory is coupled to the processor; the memory is used to store instructions executable by the processor; when the processor executes the instructions, it performs the method according to any one of claims 1 to 26.

28. A computer-readable storage medium, wherein: The computer-readable storage medium stores computer instructions, which, when executed on a communication device, enable the communication device to perform the method according to any one of claims 1 to 26.

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