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: in each period, K transmitting nodes transmit reference signals on M subcarriers of each time domain symbol among N time domain symbols, the positions of the M subcarriers being selected according to the period, and the frequency domain between every two adjacent subcarriers among the M subcarriers being spaced by Q subcarriers. The reference signals, which are transmitted by the kth transmitting node among the K transmitting nodes on the respective mth subcarriers of two adjacent time domain symbols among the N time domain symbols, exhibit a phase difference of the same phase angle θ(k), k being the sequence number of the K transmitting nodes, and m being the sequence number of the M subcarriers.

Description

Data transmission method, communication device, and storage medium

[0001] This disclosure claims priority to Chinese patent application No. 202410357875.0, filed on March 26, 2024, the entire contents of which are incorporated herein by reference. 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 widespread adoption 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. With its excellent resistance to multipath interference and inter-carrier interference, CP-OFDM waveform effectively improves the performance of wireless communication systems.

[0004] Summary of the Invention

[0005] In one aspect, a data transmission method is provided. The data transmission method includes:

[0006] In each period, K transmitting nodes transmit reference signals on M subcarriers of each time domain symbol in N time domain symbols. The positions of the M subcarriers are selected according to the period, and the frequency domain interval between two adjacent subcarriers in the M subcarriers is Q subcarriers, where K is a positive integer, and N, M, and Q are integers greater than 1.

[0007] Among them, the phases of the reference signals transmitted by the kth transmitting node among the K transmitting nodes on the mth subcarriers in two adjacent time domain symbols in the N time domain symbols have the same phase angle θ(k); k is the sequence number of the K transmitting nodes, and m is the sequence number of the M subcarriers.

[0008] In another aspect, a data transmission device is provided. The data transmission device includes:

[0009] A communication module, configured to transmit a reference signal on M subcarriers of each time domain symbol in N time domain symbols in each period; the positions of the M subcarriers are selected according to the period, and the frequency domain interval between two adjacent subcarriers in the M subcarriers is Q subcarriers, where K is a positive integer, and N, M, and Q are integers greater than 1;

[0010] Among them, the phases of the reference signals transmitted by the kth transmitting node among the K transmitting nodes on the mth subcarriers in two adjacent time domain symbols in the N time domain symbols have the same phase angle θ(k); k is the sequence number of the K transmitting nodes, and m is the sequence number of the M subcarriers.

[0011] In another aspect, a communication device is provided, comprising: a memory and a processor; the memory and the processor are coupled; the memory is configured to store computer program instructions executable by the processor; and the processor implements the data transmission method described in the above aspect when executing the computer program instructions.

[0012] In another aspect, a computer-readable storage medium is provided, wherein computer program instructions are stored on the computer-readable storage medium, and when the computer program instructions are executed on a computer (eg, a data transmission device), the data transmission method described in the above aspect is implemented.

[0013] In another aspect, a computer program product is provided, which includes computer program instructions, and when the computer program instructions are executed, the data transmission method described in the above aspect is implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure.

[0015] FIG2 is a flowchart of a data transmission method according to an embodiment of the present disclosure.

[0016] FIG3 is a schematic diagram of time-frequency resources according to an embodiment of the present disclosure.

[0017] FIG4 is a schematic diagram of another time-frequency resource according to an embodiment of the present disclosure.

[0018] FIG5 is a schematic diagram of yet another time-frequency resource according to an embodiment of the present disclosure.

[0019] FIG6 is a schematic diagram of yet another time-frequency resource according to an embodiment of the present disclosure.

[0020] FIG7 is a schematic diagram of yet another time-frequency resource according to an embodiment of the present disclosure.

[0021] FIG8 is a schematic diagram of yet another time-frequency resource according to an embodiment of the present disclosure.

[0022] FIG9 is a schematic diagram of yet another time-frequency resource according to an embodiment of the present disclosure.

[0023] FIG10 is a schematic structural diagram of a data transmission device according to an embodiment of the present disclosure.

[0024] FIG11 is a schematic structural diagram of a communication device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0025] To help those skilled in the art better understand the technical solutions of the embodiments of the present disclosure, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present disclosure without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0026] 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 merely a description of 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 necessarily limit them to be different.

[0027] It should be noted that in this disclosure, words such as "exemplarily" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described in this disclosure as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplarily" or "for example" is intended to present the relevant concepts in a concrete manner.

[0028] With the widespread adoption and application of 5G, NR technology has become a key component. In 5G NR, the CP-OFDM waveform has been widely used. With its excellent resistance to multipath interference and inter-carrier interference, the CP-OFDM waveform effectively improves the performance of wireless communication systems.

[0029] 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.

[0030] 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.

[0031] In view of this, the present disclosure proposes a data transmission method, in which K transmitting nodes transmit reference signals on M subcarriers of each time domain symbol in N time domain symbols in each period; the positions of the M subcarriers are selected according to the period, and the frequency domain interval between two adjacent subcarriers in the M subcarriers is Q subcarriers; wherein the phases of the reference signals transmitted by the kth transmitting node among the K transmitting nodes on the mth subcarriers in two adjacent time domain symbols in the N time domain symbols differ by the same phase angle θ(k); k is the serial number of the K transmitting nodes, and m is the serial number of the M subcarriers.

[0032] In this way, different subcarriers are selected to transmit reference signals in different periods, traversing different subcarriers in the frequency domain to continuously optimize channel estimation results at the receiving end and improve data transmission reliability. The phase difference of the reference signal transmitted by the kth transmitting node among K transmitting nodes on the mth subcarrier in two adjacent time domain symbols within N time domain symbols is the same, θ(k). This helps reduce interference between reference signals transmitted by different transmitting nodes in each period and facilitates channel estimation for each transmitting node at the receiving end. No additional time-frequency resources are occupied, which helps improve spectrum efficiency.

[0033] The data transmission method provided in the embodiments of the present disclosure can be applied to systems of various communication formats. For example, the data transmission method provided in the embodiments of the present disclosure can be applied to systems including, but not limited to, long-term evolution (LTE) systems, various versions based on LTE evolution, 5G systems, and other communication systems. In addition, the data transmission method provided in the embodiments of the present disclosure can also be applied to future-oriented communication systems (e.g., 6G communication systems).

[0034] 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 case where the communication between the two communication nodes is device-to-device communication, 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.

[0035] For example, taking the first communication node as a terminal and the second communication node as a base station, FIG1 shows a communication system provided by 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.

[0036] In some embodiments, base station 20 provides wireless access services to terminal 10. A 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.

[0037] In some embodiments, the base station (BS) can be a base station or an evolved base station (eNB or eNodeB) in LTE, long term evolution advanced (LTEA), a base station device in a 5G network, or a base station in a future communication system, etc. The base station may include various macro base stations, micro base stations, home base stations, wireless remote devices, reconfigurable intelligent surfaces (RISs), routers, relays, TRP (transmission reception point), wireless fidelity (WIFI) devices and other network side devices.

[0038] 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.

[0039] 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.

[0040] 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. Those skilled in the art will appreciate that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present disclosure are equally applicable to similar technical problems.

[0041] The present disclosure provides a data transmission method. As shown in FIG2 , the method includes the following S101 .

[0042] S101 . In each period, K transmitting nodes transmit reference signals on M subcarriers of each time domain symbol in N time domain symbols.

[0043] The positions of the M subcarriers are selected according to a period, and the frequency domain interval between two adjacent subcarriers among the M subcarriers is Q subcarriers, where K is a positive integer, and N, M, and Q are integers greater than 1. In this way, by adjusting the frequency domain interval 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 K transmitting nodes transmitting the reference signals in each period to adapt to different communication scenarios.

[0044] The phases of the reference signals transmitted by the k-th transmitting node among the K transmitting nodes on the m-th subcarrier in two adjacent time domain symbols in the N time domain symbols differ by the same phase angle θ(k); k is the sequence number of the K transmitting nodes, and m is the sequence number of the M subcarriers. For example, k is a non-negative integer less than or equal to K-1 (i.e., k is 0, 1, 2, ..., K-1) or k is a positive integer less than or equal to K (i.e., k is 1, 2, 3, ..., K), m is a non-negative integer less than or equal to M-1 (i.e., m is 0, 1, 2, ..., M-1) or m is a positive integer less than or equal to M (i.e., m is 1, 2, 3, ..., M).

[0045] For example, as shown in FIG3 , eight transmitting nodes transmit data signals and reference signals on resource blocks consisting of 14 orthogonal frequency-division multiplexing (OFDM) symbols (i.e., the aforementioned time-domain symbols). Each OFDM symbol contains eight resource blocks (RBs) (96 subcarriers), with a period of 14 OFDM symbols.

[0046] In each cycle, 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. In the 0th cycle (i.e., symbols 0 to 13 in the figure), each transmitting node transmits a reference signal on the 0th subcarrier (i.e., the first subcarrier) of all RBs. In the 1st cycle (i.e., symbols 14 to 27 in the figure), the subcarriers transmitting the reference signal are cyclically shifted upward by one subcarrier, i.e., the first subcarrier in each RB. The cyclic shift is repeated in the second and subsequent cycles. That is, on this resource block, in each cycle, each transmitting node transmits 8*14 reference signals at the same time-frequency position.

[0047] In some embodiments, Q is an integer multiple of the number of subcarriers contained in a resource block.

[0048] In some embodiments, in each cycle, the phase of the reference signal transmitted by the kth transmitting node on the mth subcarrier of the nth time domain symbol in N time domain symbols is related to n, where 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).

[0049] In some embodiments, within each period, the phase of the reference signal transmitted by the kth transmitting node on the mth subcarrier of the nth time domain symbol in N time domain symbols is monotonically increased at intervals of θ(k). When θ(k) is a positive value, the phase of the reference signal transmitted by the kth transmitting node on the mth subcarrier of the nth time domain symbol in N time domain symbols is positively correlated with n; when θ(k) is a negative value, the phase of the reference signal transmitted by the kth transmitting node on the mth subcarrier of the nth time domain symbol in N time domain symbols is negatively correlated with n, where n is numbered according to the order of the time domain symbols.

[0050] In some embodiments, within each period, 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 R(k,m,n). Then, R(k,m,n)=R(k,m,0)*exp(jnθ(k)), where R(k,m,0) is the reference signal transmitted by the kth transmitting node on the mth subcarrier of the first time domain symbol. In this way, the reference signals transmitted by different transmitting nodes are orthogonal in the Doppler delay domain, enabling channel estimation for each transmitting node at the receiving end.

[0051] Exemplarily, continuing to refer to Figure 3, in each cycle, the reference signal transmitted by the kth transmitting node (i.e., transmitting node k) on the mth subcarrier of the nth OFDM symbol (i.e., symbol n) is: R(k,m,n)=exp(j*pi*k / 4)*exp(jnθ(k)), that is, each user transmits a different reference signal on the 0th OFDM symbol (i.e., the first time domain symbol), where θ(k)=2πk / 14, k is the transmitting node number, k=0,1,2,...,7; m is the subcarrier number of the reference signal, m=0,1,2,...,7; n is the OFDM symbol number, n=0,1,2,...,13.

[0052] In some embodiments, the phase angles θ(k) of different transmitting nodes vary within each cycle. This means that within each cycle, the phase angle θ(k) corresponding to the kth transmitting node among K transmitting nodes varies for different values ​​of k. This facilitates the K transmitting nodes transmitting reference signals on the same N*M subcarriers, and helps reduce interference between reference signals.

[0053] In some embodiments, the phase angles θ(k) of different transmitting nodes in each cycle are different, including: the phase angle θ(k) of the kth transmitting node in each cycle is determined according to the value of k.

[0054] In some embodiments, the phase angle θ(k) of different transmitting nodes in each cycle is different, including: the phase angle θ(k) of the kth transmitting node in each cycle satisfies the formula θ(k) = 2πkB / N, B is a positive integer and is a system configuration parameter, N is greater than or equal to B*K, k is 0, 1, 2, ..., K-1 or k is 1, 2, 3, ..., K.

[0055] In some embodiments, the phase angle θ(k) of different transmitting nodes in each cycle is different, including: the phase angle θ(k) of different transmitting nodes in each cycle is an element in a phase angle set, the phase angle set includes at least K different elements, and the K different elements all satisfy the formula θ(k) = 2πiB / N, i is a non-negative integer and is less than the difference between N / B rounded down and 1, and B is a positive integer and is a system configuration parameter.

[0056] In some embodiments, the phase angle θ(k) of different transmitting nodes in each cycle is different, including: the phase angle θ(k) of different transmitting nodes in each cycle is 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(k) = 2πi / N, i is a non-negative integer less than N-1, and N is greater than or equal to K.

[0057] In some embodiments, each period includes W time-domain symbols, where W is an integer greater than or equal to N.

[0058] In some embodiments, the number of subcarriers transmitting the reference signal in each period is the same, and the number of time-domain symbols is the same.

[0059] Exemplarily, with continued reference to FIG3 , in each cycle, the number of subcarriers used by the K transmitting nodes to transmit reference signals is 8, and the number of time-domain symbols is 14.

[0060] In some embodiments, among the K transmitting nodes, the reference signals transmitted by the same transmitting node in different periods are the same or different.

[0061] In some embodiments, the frequency domain positions of the subcarriers of the reference signals transmitted by the K transmitting nodes in different periods are the same or different.

[0062] In some embodiments, K transmitting nodes transmit reference signals on M subcarriers of each time domain symbol in N time domain symbols, including: K transmitting nodes transmit reference signals on M subcarriers of each time domain symbol in the first N time domain symbols within W time domain symbols.

[0063] For example, as shown in Figure 4, four transmitting nodes (a transmitting node can be any combination of a terminal, a base station, or an application device; this example illustrates the case where all transmitting nodes are terminals) transmit data signals and reference signals on a resource block consisting of multiple OFDM symbols. Each OFDM symbol contains 8 RBs (96 subcarriers), with a period of 28 OFDM symbols.

[0064] In each cycle, each transmitting node transmits a reference signal on the same four subcarriers in each of the first 14 OFDM symbols (i.e., symbols 0 to 13 in the figure). The frequency domain interval between two adjacent subcarriers in the four subcarriers is 24 subcarriers. For example, in cycle 0 (i.e., symbols 0 to 27 in the figure), each transmitting node transmits a reference signal on the 0th subcarrier of every two RBs in each OFDM symbol in the first 14 OFDM symbols.

[0065] In some embodiments, the positions of the M subcarriers are selected according to a periodicity, including at least one of the following:

[0066] The positions of the M subcarriers selected in two adjacent periods are different;

[0067] The positions of the M subcarriers selected in two adjacent periods overlap after cyclic shift;

[0068] The positions of the M subcarriers selected in two adjacent periods overlap after cyclic shift, and the cyclic shift amounts are the same.

[0069] Exemplarily, continuing to refer to Figure 3, the positions of the M subcarriers of the transmitted reference signal in the 0th period are different from the positions of the M subcarriers of the transmitted reference signal in the 1st period, and the positions of the M subcarriers in the 0th period are all cyclically shifted upward by one subcarrier and coincide with the positions of the M subcarriers in the 1st period.

[0070] In some embodiments, the cyclic shift amount is an integer multiple of Q subcarriers.

[0071] Exemplarily, when the cyclic shift amount is 1 times of Q subcarriers, the cyclic shift amount is Q subcarriers.

[0072] In some embodiments, the subcarriers transmitting the reference signal in multiple periods correspond to the entire data bandwidth, or the subcarrier set transmitting the reference signal in multiple periods traverses the entire channel bandwidth.

[0073] In some embodiments, the phase angles of the same transmitting node in different periods are the same or different.

[0074] In some embodiments, in each cycle, the intervals between two adjacent time domain symbols in the N time domain symbols are the same.

[0075] In some embodiments, within each cycle, N time domain symbols are continuous in the time domain.

[0076] In some embodiments, within each period, there is one subcarrier in each resource block of N time domain symbols to transmit a reference signal.

[0077] In some embodiments, in each period, the frequency domain interval between two adjacent subcarriers in the M subcarriers is 12 subcarriers, and there is one subcarrier in each resource block in the N time domain symbols to transmit a reference signal.

[0078] In some embodiments, within each period, the frequency domain intervals between two adjacent subcarriers in the M subcarriers are the same.

[0079] In some embodiments, within each period, the M subcarriers are continuous in the frequency domain.

[0080] For example, assuming that within each period, M consecutive subcarriers in the frequency domain are named as the 0th subcarrier, the 2nd subcarrier, ..., the M-1th subcarrier, so that 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 within each period, if the sequence numbers between two adjacent subcarriers in the frequency domain among the M subcarriers differ by 1, then these M subcarriers are continuous in the frequency domain.

[0081] In each period, the frequency domain interval between two adjacent subcarriers among the M subcarriers is 1 subcarrier, and the M subcarriers are continuous in the frequency domain.

[0082] In some embodiments, in each period, different transmitting nodes among the K transmitting nodes transmit different reference signals on other time domain symbols except the first time domain symbol.

[0083] In some embodiments, in each cycle, different transmitting nodes among the K transmitting nodes transmit different or the same reference signals on the first time domain symbol.

[0084] For example, within a period, the reference signal transmitted by the kth transmitting node among K transmitting nodes on the first time domain symbol can be expressed as R(k,m,0), and R(k,m,0) corresponding to different transmitting nodes among different K transmitting nodes is different.

[0085] In some embodiments, in each cycle, the phase difference of the reference signals transmitted by different transmitting nodes among the K transmitting nodes on adjacent time domain symbols is different. The phase difference can also be called phase variation, which is not limited in this disclosure.

[0086] In some embodiments, the K 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).

[0087] Exemplarily, the K transmitting nodes are K terminals, or the K transmitting nodes are K base stations, or the K transmitting nodes include application devices, such as one of the following: a router, customer premises equipment (CPE), a relay node, or a switch.

[0088] In some embodiments, within each period, the same transmitting node among the K transmitting nodes transmits the same modulus value of the reference signal on the M subcarriers of each time domain symbol in the N time domain symbols. The modulus value may also have other names, such as amplitude.

[0089] In some embodiments, in each period, the phase differences of the reference signals transmitted by the same transmitting node among the K transmitting nodes on adjacent subcarriers among the M subcarriers of the same time domain symbol are the same.

[0090] In some embodiments, within each period, 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 identical. This can be understood as follows: within each period, the reference signals transmitted by the same transmitting node among the K transmitting nodes on the M subcarriers of the same time domain symbol have no phase offset, that is, the phases of the reference signals transmitted on adjacent subcarriers among the M subcarriers are identical or have a phase difference of 0. This can also be understood as follows: within each period, 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 independent of the value of m.

[0091] For example, assuming that in each cycle, the reference signal transmitted by the kth transmitting node among the K transmitting nodes on the M subcarriers on the first time domain symbol (i.e., the 0th time domain symbol) can be expressed as R(k,m,0), and R(k,m,0) is equal for different m values ​​when k remains unchanged.

[0092] Exemplarily, in each cycle, 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 also be expressed as R(k,n)=R(k,0)*exp(jnθ(k)), where R(k,0) is the reference signal transmitted by the kth transmitting node among the K transmitting nodes on the first time domain symbol.

[0093] In some embodiments, in each period, other signals are transmitted 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.

[0094] In some embodiments, in each cycle, one of the K transmitting nodes transmits other signals on different frequency domain resources of the N time domain symbols, thereby reducing interference between the other signals transmitted by multiple transmitting nodes.

[0095] For example, referring to Figure 3 , in the 0th cycle, each of the eight transmitting nodes transmits a reference signal on the 0th subcarrier of all RBs. The data signals (which may also include other reference signals) of the eight transmitting nodes are mapped to the last 11 subcarriers in each RB, with the eight RBs from bottom to top corresponding to the eight transmitting nodes. In the 1st cycle, the subcarriers for transmitting the reference signal in the 0th cycle are cyclically shifted upward by one subcarrier, and each of the eight transmitting nodes transmits a reference signal on the 1st subcarrier of all RBs. The data signals (which may also include other reference signals) of the eight transmitting nodes are mapped to the remaining 11 subcarriers in each RB, with the eight RBs from bottom to top corresponding to the eight transmitting nodes. The subcarriers for transmitting the reference signal in the second and subsequent cycles are cyclically shifted relative to the previous cycle. In each cycle, each of the eight transmitting nodes transmits 8*14 reference signals at the same time-frequency position, and the eight transmitting nodes transmit 11*14 data signals at different time-frequency positions.

[0096] In some embodiments, during each period, different transmitting nodes among the K transmitting nodes transmit other signals on different frequency domain resources of N time domain symbols. In this way, when a transmitting node needs to transmit a large number of other signals, it can occupy multiple frequency domain resources of N time domain symbols to transmit other signals.

[0097] In some embodiments, in each cycle, the frequency domain resource bandwidth used by each of the K transmitting nodes to transmit other signals is smaller than the frequency domain interval between the first subcarrier and the last subcarrier of the M subcarriers.

[0098] In some embodiments, the power of the reference signal is greater than or equal to the power of the other signals.

[0099] For example, when the other signal is a data signal, the power of the reference signal is greater than or equal to the power of the data signal.

[0100] In some embodiments, within each period, K transmitting nodes transmit signals other than a reference signal on M subcarriers of each of N time-domain symbols. The phase angles of these other signals differ from the phase angles of the K transmitting nodes. These other signals may include data signals or reference signals of a different type than the reference signals. This allows data to be transmitted in the Doppler domain at unused locations other than the reference signals, thereby improving spectrum resource utilization.

[0101] For example, continuing to refer to Figure 4, in the 0th cycle (i.e., symbol 0 to symbol 27 in the figure), each transmitting node transmits a reference signal on the 0th subcarrier of every 2 RBs in the first 14 OFDM symbols (i.e., symbol 0 to symbol 13 in the figure); the data signals of the four transmitting nodes (which may also include other reference signals) are respectively mapped on the last 23 subcarriers in every 2 RBs in the first 14 OFDM symbols, and mapped on the 24 subcarriers in every 2 RBs in the last 14 OFDM symbols (i.e., symbol 14 to symbol 27 in the figure). The 8 RBs from bottom to top correspond to the four transmitting nodes (i.e., terminal 0 to terminal 3).

[0102] In the first 14 OFDM symbols of the first cycle (i.e., symbols 28 to 41 in the figure), the subcarriers transmitting the reference signal are cyclically shifted upward by one subcarrier, namely, the first subcarrier within every two RBs. The data signals of the four transmitting nodes are mapped to the remaining 23 subcarriers within every two RBs. The data signals transmitted in the next 14 OFDM symbols are the same as those in cycle 0. The subcarriers transmitting the reference signal in the second cycle and subsequent cycles are cyclically shifted. That is, in this resource block, in each cycle, each transmitting node transmits 4*14 reference signals at the same time-frequency location and 47*14 data signals at different time-frequency locations.

[0103] In each cycle, the reference signal transmitted by the kth transmitting node (i.e., terminal k or transmitting node k) on the mth subcarrier of the nth OFDM symbol (i.e., symbol n) is: R(k,m,n)=exp(j*pi*k / 4)*exp(jnθ(k)), that is, each transmitting node transmits a different reference signal on the 0th OFDM symbol, where θ(k)=2πk / 14, k is the transmitting node number, k=0,1,2,3; m is the subcarrier number of the reference signal, m=0,1,2,3; n is the OFDM symbol number, n=0,1,2,...,13.

[0104] For example, as shown in Figure 5, there are eight transmitting nodes (a transmitting node can be any combination of terminals, base stations, or application devices; this example illustrates the case where all transmitting nodes are terminals) (terminals 0 to 7 in the figure), transmitting data signals and reference signals on a resource block consisting of multiple OFDM symbols, each of which contains 8 RBs (96 subcarriers). A period of 14 OFDM symbols is considered one period.

[0105] In each cycle, each terminal 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. In cycle 0 (i.e., symbols 0 to 13 in the figure), each terminal transmits a reference signal on subcarrier 0 across all resource blocks (RBs). The data signals of the eight terminals (which may also include other reference signals) are mapped to the last 11 subcarriers within each RB, with each of the eight RBs corresponding to eight terminals. In cycle 1 (i.e., symbols 14 to 27 in the figure), the subcarriers transmitting the reference signal are cyclically shifted downward by one subcarrier, to the 11th subcarrier within each RB, while the data signals of the eight terminals are mapped to the remaining 11 subcarriers within each RB. In cycle 2 and subsequent cycles, the subcarriers transmitting the reference signal are cyclically shifted successively. That is, within this resource block, in each cycle, each terminal transmits 8*14 reference signals at the same time-frequency location and 11*14 data signals at different time-frequency locations.

[0106] In each cycle, the reference signal transmitted by the kth terminal (i.e., terminal k) on the mth subcarrier of the nth OFDM symbol (i.e., symbol n) is: R(k,m,n) = 1*exp(jnθ(k)). That is, each terminal transmits the same reference signal on each subcarrier of the 0th OFDM symbol, where θ(k) = 2πk / 14, k is the transmitting node (terminal) number, k = 0, 1, 2, ..., 7; m is the subcarrier number of the reference signal, m = 0, 1, 2, ..., 7; and n is the OFDM symbol number, n = 0, 1, 2, ..., 13. (The reference signal can also be different in each cycle; this example shows the case where the reference signal is the same in each cycle.)

[0107] In each cycle, the K transmitting nodes may also transmit other signals superimposed on the same M subcarriers in the N OFDM symbols. The phase angles of the other signals are different from the phase angles of all transmitting nodes.

[0108] For example, as shown in Figure 6, eight transmitting nodes (which can be any combination of terminals, base stations, or application devices; this example illustrates the case where all transmitting nodes are terminals) (i.e., terminals 0 to 7 in the figure) transmit data signals and reference signals on a resource block consisting of multiple OFDM symbols. Each OFDM symbol contains 8 RBs (96 subcarriers). A period of 14 OFDM symbols.

[0109] In each cycle, each terminal transmits a reference signal on the same eight subcarriers in each of the first 13 OFDM symbols, with the frequency domain spacing between adjacent subcarriers being 12 subcarriers. In cycle 0 (i.e., symbols 0 to 13 in the figure), each terminal transmits a reference signal on the zeroth subcarrier in each RB in the first 13 OFDM symbols. The data signals of the eight terminals (which may also include other reference signals) are mapped to the last 11 subcarriers in each RB in the first 13 OFDM symbols (i.e., symbols 0 to 12 in the figure), and to the 12 subcarriers in each RB in the 13th symbol (i.e., symbol 13 in the figure). The eight RBs from bottom to top correspond to the eight terminals respectively. In the first 13 OFDM symbols of the first cycle (i.e., symbols 14 to 26 in the figure), the subcarriers transmitting the reference signal are cyclically shifted upward by one subcarrier, namely, the first subcarrier within each RB. The data signals of the eight terminals are mapped to the remaining 11 subcarriers within each RB of the first 13 OFDM symbols. The 13th OFDM symbol (i.e., symbol 27 in the figure) transmits the same data as in cycle 0. The second and subsequent cycles are cyclically shifted accordingly. That is, in each cycle on this resource block, each terminal transmits 8*13 reference signals at the same time-frequency location and 11*13+12 data signals at different time-frequency locations.

[0110] In each cycle, the reference signal transmitted by the kth terminal (i.e., terminal k) on the mth subcarrier of the nth OFDM symbol (i.e., symbol n) is: R(k,m,n)=exp(j*pi*k / 4)*exp(jnθ(k)), that is, each terminal transmits a different reference signal on the 0th OFDM symbol, where θ(k)=2πk / 14, k is the transmitting node (terminal) number, k=0,1,2,...,7; m is the subcarrier number of the reference signal, m=0,1,2,...,7; n is the OFDM symbol number, n=0,1,2,...,12.

[0111] For example, as shown in Figure 7, eight transmitting nodes (a transmitting node can be any combination of terminals, base stations, or application devices; this example illustrates the case where all transmitting nodes are terminals) (i.e., terminals 0 to 7 in the figure) transmit data signals and reference signals on a resource block consisting of multiple OFDM symbols. Each OFDM symbol contains 8 RBs (96 subcarriers). A period of 14 OFDM symbols.

[0112] In each cycle, each terminal 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. In cycle 0 (i.e., symbols 0 to 13 in the figure), each terminal transmits a reference signal on subcarrier 0 across all resource blocks (RBs). The data signals of the eight terminals (which may also include other reference signals) are mapped to the last 11 subcarriers within each RB, with each of the eight RBs corresponding to eight terminals. In cycle 1 (i.e., symbols 14 to 27 in the figure), the subcarriers transmitting the reference signal are cyclically shifted upward by two subcarriers, to the second subcarrier within each RB, while the data signals of the eight terminals are mapped to the remaining 11 subcarriers within each RB. In cycle 2 and subsequent cycles, the subcarriers transmitting the reference signal are cyclically shifted successively. That is, within this resource block, in each cycle, each terminal transmits 8*14 reference signals at the same time-frequency location and 11*14 data signals at different time-frequency locations.

[0113] In each cycle, the reference signal transmitted by the kth terminal (i.e., terminal k) on the mth subcarrier of the nth OFDM symbol (i.e., symbol n) is: R(k,m,n)=exp(j*pi*k / 4)*exp(jnθ(k)), that is, each terminal transmits a different reference signal on the 0th OFDM symbol, where θ(k)=2πk / 14, k is the transmitting node (terminal) number, k=0,1,2,...,7; m is the subcarrier number of the reference signal, m=0,1,2,...,7; n is the OFDM symbol number, n=0,1,2,...,13.

[0114] For example, as shown in Figure 8, there are eight transmitting nodes (a transmitting node can be any combination of terminals, base stations, or application devices; this example illustrates the case where all transmitting nodes are terminals) (i.e., terminals 0 to 7 in the figure), transmitting data signals and reference signals on a resource block consisting of multiple OFDM symbols. Each OFDM symbol contains 8 RBs (96 subcarriers). A period of 14 OFDM symbols.

[0115] In each cycle, each terminal transmits a reference signal on the same four subcarriers in each OFDM symbol, with the frequency domain spacing between adjacent subcarriers being 12 subcarriers. In cycle 0 (i.e., symbols 0 to 13 in the figure), each terminal transmits a reference signal on subcarrier 0 of the first four RBs (i.e., RBs 0 to 3 in the figure). The data signals of the eight terminals (which may also include other reference signals) are mapped to the remaining subcarriers within each RB, with each of the eight RBs corresponding to the eight terminals. In cycle 1 (i.e., symbols 14 to 27 in the figure), the subcarriers transmitting the reference signal are cyclically shifted upward by one subcarrier, i.e., the first subcarrier within each of the first four RBs (i.e., RBs 0 to 3 in the figure), while the data signals of the eight terminals are mapped to the remaining subcarriers within each RB. In cycle 2 and subsequent cycles, the subcarriers transmitting the reference signal are cyclically shifted accordingly. That is, on this resource block, in each period, each terminal transmits 8*14 reference signals at the same time-frequency position and transmits 11*14 or 12*14 data signals at different time-frequency positions.

[0116] In each cycle, the reference signal transmitted by the kth terminal (i.e., terminal k) on the mth subcarrier of the nth OFDM symbol (i.e., symbol n) is: R(k,m,n)=exp(j*pi*k / 4)*exp(jnθ(k)), that is, each terminal transmits a different reference signal on the 0th OFDM symbol, where θ(k)=2πk / 14, k is the transmitting node (terminal) number, k=0,1,2,...,7; m is the subcarrier number of the reference signal, m=0,1,2,3; n is the OFDM symbol number, n=0,1,2,...,13.

[0117] For example, as shown in Figure 9, eight transmitting nodes (a transmitting node can be any combination of terminals, base stations, or application devices; this example illustrates the case where all transmitting nodes are terminals) (i.e., terminals 0 to 7 in the figure) transmit data signals and reference signals on a resource block consisting of multiple OFDM symbols. Each OFDM symbol contains 8 RBs (96 subcarriers). A period of 14 OFDM symbols.

[0118] In each cycle, each terminal transmits a reference signal on the same four subcarriers in each OFDM symbol, with the frequency domain spacing between adjacent subcarriers being 12 subcarriers. In cycle 0 (i.e., symbols 0 to 13 in the figure), each terminal transmits a reference signal on the 0th subcarrier of the first four RBs (i.e., RBs 0 to 3 in the figure). The data signals of the eight terminals (which may also include other reference signals) are mapped to the remaining subcarriers within each RB, with each of the eight RBs from bottom to top corresponding to the eight terminals. In cycle 1 (i.e., symbols 14 to 27 in the figure), the subcarriers transmitting the reference signal are cyclically shifted upward by 12 subcarriers, i.e., the first subcarrier in each RB from 1 to 4 in the figure, while the data signals of the eight terminals are mapped to the remaining subcarriers in each RB. In cycle 2 and subsequent cycles, the subcarriers transmitting the reference signal are cyclically shifted accordingly. That is, on this resource block, in each period, each terminal transmits 8*14 reference signals at the same time-frequency position and transmits 11*14 or 12*14 data signals at different time-frequency positions.

[0119] In each cycle, the reference signal transmitted by the kth terminal (i.e., terminal k) on the mth subcarrier of the nth OFDM symbol (i.e., symbol n) is: R(k,m,n)=exp(j*pi*k / 4)*exp(jnθ(k)), that is, each terminal transmits a different reference signal on the 0th OFDM symbol, where θ(k)=2πk / 14, k is the transmitting node (terminal) number, k=0,1,2,...,7; m is the subcarrier number of the reference signal, m=0, 1,2,3; n is the OFDM symbol number, n=0,1,2,...,13.

[0120] Based on this, different subcarriers are selected to transmit reference signals in different periods, and different subcarriers in the frequency domain are traversed, so as to continuously optimize the channel estimation results at the receiving end and improve the reliability of data transmission. The phases of the reference signals transmitted by the k-th transmitting node among the K transmitting nodes on the m-th subcarriers in two adjacent time domain symbols in the N time domain symbols differ by the same phase angle θ(k). In this way, it is beneficial to reduce the interference between the reference signals transmitted by different transmitting nodes in each period, and it is also beneficial for the receiving end to perform channel estimation of each transmitting node without occupying additional time-frequency resources, which is beneficial to improve spectrum efficiency. The above mainly introduces the scheme of the embodiment of the present disclosure from the perspective of the method. A data transmission device is also shown below, which is used to execute the data transmission method in any of the above embodiments and possible implementation methods thereof.

[0121] 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 the form of hardware or computer software driving hardware 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.

[0122] 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.

[0123] FIG10 is a schematic diagram of the structure of a data transmission device provided by an embodiment of the present disclosure. The data transmission device 200 includes: a processing module 201 and a communication module 202 .

[0124] The processing module 201 is configured to determine that, in each period, K transmitting nodes transmit reference signals on M subcarriers of each time domain symbol in N time domain symbols;

[0125] Communication module 202, configured to transmit, in each period, K transmitting nodes on M subcarriers of each time domain symbol in N time domain symbols; the positions of the M subcarriers are selected according to the period, and the frequency domain interval between two adjacent subcarriers in the M subcarriers is Q subcarriers, where K is a positive integer, and N, M, and Q are integers greater than 1;

[0126] Among them, the phases of the reference signals transmitted by the kth transmitting node among the K transmitting nodes on the mth subcarriers in two adjacent time domain symbols in the N time domain symbols have the same phase angle θ(k); k is the sequence number of the K transmitting nodes, and m is the sequence number of the M subcarriers.

[0127] In some embodiments, in each cycle, the phase of the reference signal transmitted by the kth transmitting node on the mth subcarrier of the nth time domain symbol in N time domain symbols is positively correlated with n, where n is a non-negative integer less than or equal to N.

[0128] In some embodiments, in each cycle, 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 R(k,m,n), then R(k,m,n)=R(k,m,0)*exp(jnθ(k)), where R(k,m,0) is the reference signal transmitted by the kth transmitting node on the mth subcarrier of the first time domain symbol.

[0129] In some embodiments, the phase angles θ(k) of different transmitting nodes are different in each cycle.

[0130] In some embodiments, each period includes W time-domain symbols, where W is an integer greater than or equal to N.

[0131] In some embodiments, the number of subcarriers transmitting the reference signal in each period is the same, and the number of time-domain symbols is the same.

[0132] In some embodiments, the reference signals transmitted by the same transmitting node among the K transmitting nodes in different periods are the same or different.

[0133] In some embodiments, the frequency domain positions of the subcarriers of the reference signals transmitted by the K transmitting nodes in different periods are the same or different.

[0134] In some embodiments, K transmitting nodes transmit reference signals on M subcarriers of each of N time domain symbols, including:

[0135] The K transmitting nodes transmit a reference signal on M subcarriers of each time domain symbol in the first N time domain symbols within the W time domain symbols.

[0136] In some embodiments, the positions of the M subcarriers are selected according to a periodicity, including at least one of the following:

[0137] The positions of the M subcarriers selected in two adjacent periods are different;

[0138] The positions of the M subcarriers selected in two adjacent periods overlap after cyclic shift;

[0139] The positions of the M subcarriers selected in two adjacent periods overlap after cyclic shift, and the cyclic shift amounts are the same.

[0140] In some embodiments, the cyclic shift amount is an integer multiple of Q subcarriers.

[0141] In some embodiments, the subcarriers transmitting the reference signal in multiple periods correspond to the entire data bandwidth, or the subcarrier set transmitting the reference signal in multiple periods traverses the entire channel bandwidth.

[0142] In some embodiments, the phase angles θ(k) of different transmitting nodes in each cycle are different, including: the phase angle θ(k) of the kth transmitting node in each cycle is determined according to the value of k.

[0143] In some embodiments, the phase angle θ(k) of different transmitting nodes in each cycle is different, including: the phase angle θ(k) of the kth transmitting node in each cycle satisfies the formula θ(k) = 2πkB / N, B is a positive integer and is a system configuration parameter, N is greater than or equal to B*K, k is 0, 1, 2, ..., K-1 or k is 1, 2, 3, ..., K.

[0144] In some embodiments, the phase angle θ(k) of different transmitting nodes in each cycle is different, including: the phase angle θ(k) of different transmitting nodes in each cycle is an element in a phase angle set, the phase angle set includes at least K different elements, and the K different elements all satisfy the formula θ(k) = 2πiB / N, i is a non-negative integer and is less than the difference between N / B rounded down and 1, and B is a positive integer and is a system configuration parameter.

[0145] In some embodiments, the phase angle θ(k) of different transmitting nodes in each cycle is different, including: the phase angle θ(k) of different transmitting nodes in each cycle is 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(k) = 2πi / N, i is a non-negative integer less than N-1, and N is greater than or equal to K.

[0146] In some embodiments, the phase angles of the same transmitting node in different periods are the same or different.

[0147] In some embodiments, in each cycle, the intervals between two adjacent time domain symbols in the N time domain symbols are the same.

[0148] In some embodiments, within each cycle, N time domain symbols are continuous in the time domain.

[0149] In some embodiments, within each period, the frequency domain intervals between two adjacent subcarriers in the M subcarriers are the same.

[0150] In some embodiments, within each period, there is one subcarrier in each resource block of N time domain symbols to transmit a reference signal.

[0151] In some embodiments, within each period, the M subcarriers are continuous in the frequency domain.

[0152] In some embodiments, Q is an integer multiple of the number of subcarriers contained in a resource block.

[0153] In some embodiments, in each period, different transmitting nodes among the K transmitting nodes transmit different reference signals on other time domain symbols except the first time domain symbol.

[0154] In some embodiments, in each cycle, different transmitting nodes among the K transmitting nodes transmit different or the same reference signals on the first time domain symbol.

[0155] In some embodiments, in each cycle, phase differences of reference signals transmitted by different transmitting nodes among the K transmitting nodes on adjacent time domain symbols are different.

[0156] In some embodiments, the K transmitting nodes include at least one of the following: a terminal, a base station, and an application device.

[0157] In some embodiments, in each period, the same transmitting node among the K transmitting nodes transmits the same modulus value of the reference signal on the M subcarriers of each time domain symbol in the N time domain symbols.

[0158] In some embodiments, in each cycle, the phase differences of the reference signals transmitted on adjacent subcarriers among the M subcarriers of the same time domain symbol are the same.

[0159] In some embodiments, in each period, 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.

[0160] In some embodiments, the communication module 202 is configured to transmit other signals on subcarriers other than the M subcarriers on the N time domain symbols in each cycle.

[0161] In some embodiments, in each period, there is one transmitting node among the K transmitting nodes that transmits other signals on different frequency domain resources of N time domain symbols.

[0162] In some embodiments, in each period, different transmitting nodes among the K transmitting nodes transmit other signals on different frequency domain resources of N time domain symbols.

[0163] In some embodiments, in each cycle, the frequency domain resource bandwidth used by each of the K transmitting nodes to transmit other signals is smaller than the frequency domain interval between the first subcarrier and the last subcarrier of the M subcarriers.

[0164] In some embodiments, the power of the reference signal is greater than or equal to the power of the other signals.

[0165] In some embodiments, the communication module 202 is configured to transmit, in each period, K transmitting nodes on M subcarriers of each of N time domain symbols, other signals except the reference signal, and the phase angles of the other signals are different from the phase angles of the K transmitting nodes.

[0166] 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 11, the communication device 300 includes: a memory 301, a processor 302, a communication interface 303, and a bus 304.

[0167] 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, 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.

[0168] The processor 302 may be a logic block, module, and circuit that implements or executes the various exemplary methods 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. The processor 302 may also 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.

[0169] 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).

[0170] In one implementation, the memory 301 may exist independently of the processor 302 and may be connected to the processor 302 via a bus 304 for storing 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 embodiments of the present disclosure can be implemented.

[0171] In another implementation, the memory 301 may also be integrated with the processor 302 .

[0172] Bus 304 can be an Extended Industry Standard Architecture (EISA) bus, for example. Bus 304 can be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, FIG11 shows bus 304 with only one bold line, but this does not imply that there is only one bus or only one type of bus.

[0173] Some embodiments of the present disclosure provide a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium), which stores computer program instructions. When the computer program instructions are executed on a computer, the computer executes the data transmission method described in any of the above embodiments.

[0174] In one embodiment, the computer may be the aforementioned communication device, and the present disclosure does not limit the specific form of the computer.

[0175] 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 memories (EPROMs), 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.

[0176] 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.

[0177] 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: In each period, K transmitting nodes transmit reference signals on M subcarriers of each time domain symbol in N time domain symbols; The positions of the M subcarriers are selected according to a period, and the frequency domain interval between two adjacent subcarriers in the M subcarriers is Q subcarriers, where K is a positive integer, and N, M, and Q are integers greater than 1; Among them, the phases of the reference signals transmitted by the kth transmitting node among the K transmitting nodes on the mth subcarriers in two adjacent time domain symbols in the N time domain symbols differ by the same phase angle θ(k); k is the sequence number of the K transmitting nodes, and m is the sequence number of the M subcarriers.

2. The method according to claim 1, wherein In each cycle, the phase of the reference signal transmitted by the kth transmitting node on the mth subcarrier of the nth time domain symbol in the N time domain symbols is positively correlated with n, where n is a non-negative integer less than or equal to N.

3. The method according to claim 1, wherein In each period, 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 R(k,m,n), then R(k,m,n)=R(k,m,0)*exp(jnθ(k)), where R(k,m,0) is the reference signal transmitted by the kth transmitting node on the mth subcarrier of the first time domain symbol.

4. The method according to claim 1, wherein The phase angles θ(k) of different transmitting nodes in each cycle are different.

5. The method according to claim 1, wherein Each cycle includes W time domain symbols, where W is an integer greater than or equal to N.

6. The method according to claim 1, wherein The number of subcarriers transmitting the reference signal in each period is the same, and the number of time domain symbols is the same.

7. The method according to claim 1, wherein The reference signals transmitted by the same transmitting node among the K transmitting nodes in different periods are the same or different.

8. The method according to claim 1, wherein The frequency domain positions of the subcarriers of the reference signals transmitted by the K transmitting nodes in different periods are the same or different.

9. The method according to claim 1, wherein: The K transmitting nodes transmit reference signals on M subcarriers of each time domain symbol in N time domain symbols, including: The K transmitting nodes transmit the reference signal on M subcarriers of each time domain symbol in first N time domain symbols within the W time domain symbols.

10. The method according to claim 1, wherein The positions of the M subcarriers are selected according to a period, including at least one of the following: The positions of the M subcarriers selected in two adjacent periods are different; The positions of the M subcarriers selected in two adjacent periods overlap after cyclic shift; The positions of the M subcarriers selected in two adjacent periods overlap after cyclic shift, and the cyclic shift amounts are the same.

11. The method according to claim 10, wherein: The cyclic shift amount is an integer multiple of the Q subcarriers.

12. The method according to claim 1, wherein The subcarriers transmitting the reference signal in multiple periods correspond to the entire data bandwidth, or the subcarrier set transmitting the reference signal in multiple periods traverses the entire channel bandwidth.

13. The method according to claim 4, wherein The phase angles θ(k) of different transmitting nodes in each cycle are different, including: the phase angle θ(k) of the kth transmitting node in each cycle is determined according to the value of k.

14. The method according to claim 4, wherein: The phase angles θ(k) of different transmitting nodes in each cycle are different, including: the phase angle θ(k) of the kth transmitting node in each cycle satisfies the formula θ(k)=2πkB / N, where B is a positive integer and is a system configuration parameter, N is greater than or equal to B*K, and k is 0, 1, 2, ..., K-1.

15. The method according to claim 4, wherein The phase angles θ(k) of different transmitting nodes in each cycle are different, including: the phase angles θ(k) of different transmitting nodes in each cycle are an element in a phase angle set, the phase angle set includes at least K different elements, and the K different elements all satisfy the formula θ(k)=2πiB / N, where i is a non-negative integer and is less than the difference between N / B rounded down and 1, and B is a positive integer and is a system configuration parameter.

16. The method according to claim 4, wherein The phase angle θ(k) of different transmitting nodes in each cycle is different, including: the phase angle θ(k) of different transmitting nodes in each cycle is 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(k)=2πi / N, i is a non-negative integer less than N-1, and N is greater than or equal to K.

17. The method according to claim 1, wherein The phase angles of the same transmitting node in different periods are the same or different.

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

19. The method according to claim 1, wherein In each cycle, the N time domain symbols are continuous in the time domain.

20. The method according to claim 1, wherein In each period, the frequency domain intervals between two adjacent subcarriers in the M subcarriers are the same.

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

22. The method according to claim 1, wherein In each period, the M subcarriers are continuous in the frequency domain.

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

24. The method according to claim 1, wherein In each of the cycles, different transmitting nodes among the K transmitting nodes transmit different reference signals on other time domain symbols except the first time domain symbol.

25. The method according to claim 1, wherein In each period, the reference signals transmitted by different transmitting nodes among the K transmitting nodes on the first time domain symbol are different or the same.

26. The method according to claim 1, wherein In each cycle, phase differences of reference signals transmitted by different transmitting nodes among the K transmitting nodes on adjacent time domain symbols are different.

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

28. The method according to claim 1, wherein In each period, a same transmitting node among the K transmitting nodes transmits the same modulus value of the reference signal on the M subcarriers of each time domain symbol in the N time domain symbols.

29. The method according to claim 1, wherein In each period, the phase differences of the reference signals transmitted by the same transmitting node among the K transmitting nodes on adjacent subcarriers among the M subcarriers in the same time domain symbol are the same.

30. The method of claim 1, wherein In each period, 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.

31. The method according to claim 1, wherein In each of the cycles, other signals are transmitted on subcarriers other than the M subcarriers on the N time domain symbols.

32. The method according to claim 31, wherein In each of the cycles, there is one transmitting node among the K transmitting nodes that transmits the other signal on different frequency domain resources of the N time domain symbols.

33. The method according to claim 31, wherein In each of the cycles, different transmitting nodes among the K transmitting nodes transmit the other signals on different frequency domain resources of the N time domain symbols.

34. The method according to claim 31, wherein In each of the cycles, a frequency domain resource bandwidth used by each of the K transmitting nodes to transmit the other signal is smaller than a frequency domain interval between a first subcarrier and a last subcarrier in the M subcarriers.

35. The method of claim 31 , wherein: The power of the reference signal is greater than or equal to the power of the other signals.

36. The method of claim 1, wherein In each of the cycles, the K transmitting nodes transmit other signals except the reference signal on the M subcarriers of each time domain symbol in the N time domain symbols, and the phase angle of the other signals is different from the phase angle of the K transmitting nodes.

37. A communication device comprising: A memory and a processor; wherein the memory and the processor are coupled; the memory is used to store instructions executable by the processor; and when the processor executes the instructions, it performs the data transmission method according to any one of claims 1 to 36.

38. A computer-readable storage medium, wherein: The computer-readable storage medium stores computer instructions, and when the computer instructions are executed on a communication device, the communication device is caused to execute the data transmission method according to any one of claims 1 to 36.

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