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: K transmitting nodes transmitting reference signals on the same M subcarriers in N time-domain symbols, wherein the frequency-domain interval between two adjacent subcarriers among the M subcarriers is Q subcarriers, the phases of reference signals transmitted by a kth transmitting node among the K transmitting nodes on mth subcarriers in two adjacent time-domain symbols among the N time-domain symbols differ by the same phase angle θ(k), k is a serial number for the K transmitting nodes, and m is a serial number for the M subcarriers.

Description

Data transmission method, communication device and storage medium

[0001] This application claims priority to Chinese patent application No. 202410359011.2, 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 popularization and application of the fifth generation mobile communication technology (5G), new radio (NR) technology has become its key component. In 5G NR, the cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) waveform has been widely used, which effectively improves the performance of wireless communication systems with its excellent ability to resist multipath interference and inter-carrier interference. However, transmitting perception signals on the time-frequency resources of the CP-OFDM waveform will occupy the time-frequency resources used for communication data. Especially in the scenario of integrated interawareness, when multiple transmitting nodes need to transmit perception signals at the same time, more time-frequency resources that should be used for communication will be occupied, resulting in a significant reduction in spectrum efficiency.

[0004] 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.

[0005] Summary of the Invention

[0006] The embodiments of the present disclosure provide a data transmission method, a communication device, and a storage medium, which are helpful in improving spectrum efficiency. The technical solutions provided by the embodiments of the present disclosure are as follows.

[0007] On the one hand, a data transmission method is provided, which includes: K 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, K and Q are positive integers, and N and M are integers greater than 1; the phases of the reference signals transmitted by the kth transmitting node among the K transmitting nodes on the mth subcarrier of two adjacent time domain symbols in the N time domain symbols have the same phase angle θ(k) difference; k is the serial number of the transmitting node among the K transmitting nodes, m is the serial number of the subcarrier among the M subcarriers, k is a non-negative integer less than or equal to K, and m is a non-negative integer less than or equal to M.

[0008] In another aspect, a data transmission device is provided, comprising: a communication module configured to cause K transmitting nodes to 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, where K and Q are positive integers, and N and M are integers greater than 1. The phases of the reference signals transmitted by the kth transmitting node among the K transmitting nodes on the mth subcarrier of 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 transmitting node among the K transmitting nodes, m is the serial number of the subcarrier among the M subcarriers, k is a non-negative integer less than or equal to K, and m is a non-negative integer less than or equal to M.

[0009] 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.

[0010] In another aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer program instructions, which, when executed on a computer (eg, a data transmission device or a communication device), implement the above-mentioned data transmission method.

[0011] 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

[0012] FIG1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure.

[0013] FIG2 is a flowchart of a data transmission method according to an embodiment of the present disclosure.

[0014] FIG3 is a schematic diagram of time-frequency resources according to an embodiment of the present disclosure.

[0015] FIG4 is a schematic diagram of another time-frequency resource according to an embodiment of the present disclosure.

[0016] FIG5 is a schematic diagram of yet another time-frequency resource according to an embodiment of the present disclosure.

[0017] FIG6 is a schematic diagram of yet another time-frequency resource according to an embodiment of the present disclosure.

[0018] FIG7 is a schematic diagram of yet another time-frequency resource according to an embodiment of the present disclosure.

[0019] FIG8 is a schematic diagram of yet another time-frequency resource according to an embodiment of the present disclosure.

[0020] FIG9 is a schematic diagram of yet another time-frequency resource according to an embodiment of the present disclosure.

[0021] FIG10 is a schematic diagram of yet another time-frequency resource according to an embodiment of the present disclosure.

[0022] FIG11 is a schematic diagram of yet another time-frequency resource according to an embodiment of the present disclosure.

[0023] FIG12 is a schematic diagram of another time-frequency resource according to an embodiment of the present disclosure.

[0024] FIG13 is a schematic diagram of another time-frequency resource according to an embodiment of the present disclosure.

[0025] FIG14 is a schematic diagram of another time-frequency resource according to an embodiment of the present disclosure.

[0026] FIG15 is a schematic diagram of another time-frequency resource according to an embodiment of the present disclosure.

[0027] FIG16 is a schematic structural diagram of a data transmission device according to an embodiment of the present disclosure.

[0028] FIG17 is a schematic structural diagram of a communication device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] In view of this, the present disclosure proposes a data transmission method, which includes: K 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, K and Q are positive integers, and N and M are integers greater than 1; the phases of the reference signals transmitted by the kth transmitting node among the K transmitting nodes on the mth subcarrier of two adjacent time domain symbols in the N time domain symbols have the same phase angle θ(k) difference; k is the serial number of the transmitting node among the K transmitting nodes, m is the serial number of the subcarrier among the M subcarriers, k is a non-negative integer less than or equal to K, and m is a non-negative integer less than or equal to M.

[0036] In this design, K 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. This allows the receiver to simultaneously obtain channel information for the K different transmitting nodes from the reference signals on the N*M subcarriers, thereby perceiving the channel conditions of the entire wireless environment. At the same time, by adjusting the frequency domain spacing Q between two adjacent subcarriers in 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 signals to adapt to different communication scenarios. The phases of the reference signals transmitted by the kth transmitting node among the K transmitting nodes on the mth subcarriers of two adjacent time domain symbols in N time domain symbols differ by the same phase angle θ(k). This ensures that the reference signals of each transmitting node do not interfere with the transmission of the reference signals of other transmitting nodes during transmission. Furthermore, these reference signals can also be used for channel estimation in communications, without occupying additional time-frequency resources, which helps improve spectrum efficiency.

[0037] 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, long-term evolution (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).

[0038] The network architecture of the mobile communication network (including but not limited to 3G, 4G, 5G and future mobile communication networks) in the embodiments 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 a device-to-device communication between 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.

[0039] 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. The communication system includes a terminal 10 and a base station 20. There can be one or more terminals 10 and base stations 20, and their number is not limited.

[0040] 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.

[0041] In some embodiments, a base station (BS) may 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. The base station 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] The embodiments of the present disclosure provide a data transmission method. As shown in FIG2 , the data transmission method includes the following S101 : K transmitting nodes transmit reference signals on the same M subcarriers in N time domain symbols.

[0046] The frequency domain spacing between two adjacent subcarriers among the M subcarriers is Q subcarriers, where K and Q are positive integers, and N and M are integers greater than 1. 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.

[0047] The phases of the reference signals transmitted by the k-th transmitting node among the K transmitting nodes on the m-th subcarriers of 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).

[0048] In some embodiments, Q is an integer multiple of the number of subcarriers contained in a resource block.

[0049] For example, as shown in Figure 3, eight transmitting nodes transmit data signals and reference signals on a resource block consisting of 14 orthogonal frequency-division multiplexing (OFDM) symbols (i.e., the time domain symbols mentioned above) (i.e., the 0th OFDM symbol to the 13th OFDM symbol in the figure), each OFDM symbol containing 8 resource blocks (RBs) (96 subcarriers). Each transmitting node transmits a reference signal on the same 8 subcarriers in each OFDM symbol, and the frequency domain spacing between two adjacent subcarriers in the 8 subcarriers is 12 subcarriers. Each transmitting node transmits a reference signal on the first subcarrier of all RBs.

[0050] In some embodiments, 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 (i.e., n is 0, 1, 2, ..., N-1 or n is 1, 2, 3, ..., N).

[0051] In some embodiments, 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 with an interval of θ(k). Furthermore, 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. n is numbered according to the order of the time domain symbols.

[0052] In some embodiments, 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.

[0053] In some embodiments, the different phase angles θ(k) among the K transmitting nodes can also be understood as the phase angle θ(k) corresponding to the kth transmitting node among the K transmitting nodes being different for different values ​​of k. This facilitates the K transmitting nodes to transmit reference signals on the same N*M subcarriers and helps reduce interference between reference signals.

[0054] Exemplarily, continuing to refer to Figure 3, the reference signal transmitted by the k-th transmitting node on the m-th subcarrier of the n-th OFDM symbol is: R(k,m,n)=1*exp(jnθ(k)), that is, the reference signal transmitted by each transmitting node on the 8 subcarriers on the 0th OFDM symbol (that is, the first time domain symbol mentioned above) is the same, 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.

[0055] In this way, the reference signal of any transmitting node will not interfere with the data information on other subcarriers of other transmitting nodes. Moreover, the reference signal of each transmitting node is transmitted on the same N*M subcarriers using a special orthogonal multiplexing method, thereby avoiding mutual interference.

[0056] In some embodiments, the phase angles θ(k) of different transmitting nodes among the K transmitting nodes are different, including: the phase angle θ(k) of the kth transmitting node among the K transmitting nodes is determined according to the value of k.

[0057] In some embodiments, the phase angle θ(k) of different transmitting nodes among the K transmitting nodes is different, including: the phase angle θ(k) of the kth transmitting node among the K transmitting nodes 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.

[0058] In some embodiments, the phase angle θ(k) of different transmitting nodes among the K transmitting nodes is different, including: the phase angle θ(k) of different transmitting nodes among the K transmitting nodes is respectively an element of 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 less than the difference between N / B rounded down and 1, and B is a positive integer and a system configuration parameter. The difference between N / B rounded down and 1 can also be expressed as floor(N / B)-1, where floor() represents rounding down.

[0059] In some embodiments, the phase angle θ(k) of different transmitting nodes among the K transmitting nodes is different, including: the phase angle θ(k) of different transmitting nodes among the K transmitting nodes is respectively 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.

[0060] 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 position in the N time domain symbols; and K transmitting nodes transmit reference signals on the same N*M subcarrier resources.

[0061] 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.

[0062] In some embodiments, the intervals between two adjacent time domain symbols in the N time domain symbols are the same.

[0063] In some embodiments, the N time-domain symbols are continuous in the time domain.

[0064] In some embodiments, there is one subcarrier in each resource block in N time domain symbols to transmit a reference signal.

[0065] Exemplarily, when the interval between two adjacent subcarriers in the frequency domain among the M subcarriers is 12 subcarriers, there is one subcarrier in each resource block in the N time domain symbols for transmitting a reference signal.

[0066] In some embodiments, the intervals between two adjacent subcarriers in the M subcarriers are the same.

[0067] In some embodiments, the M subcarriers are continuous in the frequency domain.

[0068] 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, such 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 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.

[0069] In some embodiments, different transmitting nodes among the K transmitting nodes transmit different reference signals on other time domain symbols except the first time domain symbol.

[0070] In some embodiments, the reference signals transmitted by different transmitting nodes among the K transmitting nodes in the first time domain symbol are different or the same.

[0071] Exemplarily, the reference signal transmitted by the kth transmitting node among the 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 the K transmitting nodes is different.

[0072] In some embodiments, the phase differences of the reference signals transmitted by different transmitting nodes in adjacent time domain symbols among the K transmitting nodes are different. The phase difference may also be referred to as phase variation, which is not limited in the present disclosure.

[0073] In some embodiments, the phase difference between reference signals transmitted by different transmitting nodes among the K transmitting nodes on adjacent time domain symbols is θ(k)=2πkB / N. When B remains unchanged, θ(k) is related to k.

[0074] 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).

[0075] 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.

[0076] In some embodiments, the same transmitting node among the K transmitting nodes transmits the same modulus value of the reference signal on the same M subcarriers in the N time domain symbols. The modulus value may also have other names, such as amplitude.

[0077] In some embodiments, the phase differences of 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. This can also be described as the phase differences of 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.

[0078] 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 identical. This can be understood as the reference signals transmitted by the same transmitting node among the K transmitting nodes on the M subcarriers of the same time domain symbol having no phase offset, i.e., 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 the reference signals transmitted by the same transmitting node among the K transmitting nodes on the M subcarriers of the same time domain symbol being independent of the value of m.

[0079] Exemplarily, assuming that the reference signal transmitted by the kth transmitting node among K transmitting nodes on the M subcarriers on the first 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.

[0080] Exemplarily, the reference signal transmitted by the kth transmitting node among the K transmitting nodes on the M subcarriers of 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.

[0081] In some embodiments, the K 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.

[0082] In some embodiments, different transmitting nodes among the K transmitting nodes transmit other signals on different frequency domain resources of the N time domain symbols, thereby reducing interference generated between the transmitting other signals of the multiple transmitting nodes.

[0083] 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, with each of the eight RBs from bottom to top corresponding 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 of the eight transmitting nodes transmit 11*14 data signals at different time-frequency locations.

[0084] In some embodiments, one of the K transmitting nodes transmits other signals on different frequency domain resources within N time domain symbols. This allows the transmitting node to occupy multiple frequency domain resources within N time domain symbols when it needs to transmit a large number of other signals. In some embodiments, the bandwidth of the frequency domain resource used by each of the K transmitting nodes to transmit other signals is less than the frequency domain spacing between the first and last subcarriers among the M subcarriers.

[0085] In some embodiments, the power of the reference signal is greater than or equal to the power of the other signals.

[0086] Exemplarily, when the other signals are data signals, the power of the reference signal is greater than or equal to the power of the data signal.

[0087] In some embodiments, K transmitting nodes transmit other signals, in addition to the reference signal, superimposed on the same M subcarriers in N time-domain symbols. The phase angles of these other signals differ from those of the K transmitting nodes. These other signals may include data signals or other reference signals. This allows data signals to be transmitted in available locations in the Doppler domain, in addition to the reference signal, improving spectrum resource utilization.

[0088] Exemplarily, as shown in FIG4 , there are four transmitting nodes (which can be any combination of terminals, base stations or application devices, and this example shows a case where all four transmitting nodes are terminals) (i.e., terminals 0 to 3 in the figure) transmitting data signals and reference signals on a resource block consisting of 14 OFDM symbols (i.e., the 0th OFDM symbol to the 13th OFDM symbol in the figure), each OFDM symbol containing 8 RBs (96 subcarriers).

[0089] Each terminal transmits a reference signal on the same four subcarriers in each OFDM symbol, with the frequency domain spacing between adjacent subcarriers being 24 subcarriers. Each terminal transmits a reference signal on the first subcarrier of every two resource blocks (RBs). The data signals of the four terminals are mapped to the last 23 subcarriers within each two-RB. From bottom to top, each of the eight RBs corresponds to four terminals. That is, within this resource block, each terminal transmits 4*14 reference signals at the same time-frequency location, while different terminals transmit 23*14 data signals at different time-frequency locations.

[0090] The reference signal transmitted by the kth terminal (i.e., terminal k) on the mth subcarrier of the nth OFDM symbol is: R(k,m,n) = exp(j*pi*k / 2)*exp(j*pi*k*m / 2)*exp(jnθ(k)). This means that each terminal transmits a different reference signal in the 0th OFDM symbol. θ(k) = 2πk / 14, where k is the transmitting node (terminal) number, k = 0, 1, 2, 3, m is the subcarrier number of the reference signal, m = 0, 1, 2, 3, and n is the OFDM symbol number, n = 0, 1, 2, ... 13. This means that the reference signals mapped to the Doppler delay domain by different terminals have different delay-domain locations.

[0091] Exemplarily, as shown in FIG5 , there are 10 transmitting nodes (which can be any combination of terminals, base stations or application devices, and this example shows a case where all 10 transmitting nodes are terminals) (i.e., terminals 0 to 9 in the figure) transmitting data signals and reference signals on a resource block consisting of 14 OFDM symbols (i.e., the 0th OFDM symbol to the 13th OFDM symbol in the figure), each OFDM symbol containing 8 RBs (96 subcarriers).

[0092] Each terminal transmits a reference signal on the same 10 subcarriers in each OFDM symbol, and the frequency domain interval between two adjacent subcarriers in the 10 subcarriers is 10 subcarriers. Each terminal transmits a reference signal on the first subcarrier of all 10 subcarriers. The data signals of the first 9 terminals (i.e., terminals 0 to 8 in the figure) are mapped to the last 9 subcarriers of every 10 subcarriers, and the data signal of terminal 9 is mapped to the last 4 subcarriers of 96 subcarriers (i.e., subcarriers 92 to subcarrier 95 in the figure), corresponding to 10 terminals from bottom to top. That is, in this resource block, each terminal transmits 10*14 reference signals at the same time-frequency position, each of the first 9 terminals transmits 9*14 data signals at different time-frequency positions, and terminal 9 transmits 4*14 data signals.

[0093] The reference signal transmitted by the kth terminal (i.e., terminal k) on the mth subcarrier of the nth OFDM symbol is: R(k,m,n) = exp(j*pi*k / 5)*exp(jnθ(k)). That is, each terminal transmits a different reference signal in OFDM symbol 0. θ(k) = 2πk / 14, where k is the transmitting node (terminal) number, k = 0, 1, 2, ... 10, m is the reference signal subcarrier number, m = 0, 1, 2, ... 10, and n is the OFDM symbol number, n = 0, 1, 2, ... 13.

[0094] Exemplarily, as shown in FIG6 , there are 8 transmitting nodes (which can be any combination of terminals, base stations or application devices, and this example shows the case where all 8 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 14 OFDM symbols (i.e., the 0th OFDM symbol to the 13th OFDM symbol in the figure), each OFDM symbol containing 8 RBs (96 subcarriers).

[0095] Each terminal transmits a reference signal on the same six subcarriers in each OFDM symbol. The frequency domain spacing between adjacent subcarriers is 12 subcarriers. Each terminal transmits a reference signal on the first subcarrier of each of the first six resource blocks (RBs 0 through 5). The data signals (which may also include other reference signals) of the first six terminals (terminals 0 through 5 in the figure) are mapped to the last 11 subcarriers of each of the first six RBs. The data signals (which may also include other reference signals) of the last two terminals (terminals 6 through 7 in the figure) are mapped to the 12 subcarriers of each of the last two RBs. Each of the eight RBs from bottom to top corresponds to eight terminals. In other words, within this resource block, each terminal transmits 6*14 reference signals at the same time-frequency location. The first six terminals transmit 11*14 data signals, and the last two terminals transmit 12*14 data signals.

[0096] The reference signal transmitted by the kth terminal (i.e., terminal k) on the mth subcarrier of the nth OFDM symbol is: R(k,m,n) = 1*exp(jnθ(k)). That is, each terminal transmits the same reference signal on the six subcarriers of OFDM symbol 0. θ(k) = 2πk / 14, where k is the transmitting node (terminal) number, k = 0, 1, 2, ... 7, m is the reference signal subcarrier number, m = 0, 1, 2, ... 7, and n is the OFDM symbol number, n = 0, 1, 2, ... 13.

[0097] Exemplarily, as shown in FIG7 , there are 50 transmitting nodes (which can be any combination of terminals, base stations or application devices, and this example shows the case where all 50 transmitting nodes are terminals) (i.e., terminals 0 to 49 in the figure) transmitting data signals and reference signals on a resource block consisting of 70 OFDM symbols (i.e., the 0th OFDM symbol to the 69th OFDM symbol in the figure), each OFDM symbol containing 100 RBs (1200 subcarriers)).

[0098] Each terminal transmits a reference signal on the same 100 subcarriers in each OFDM symbol, with the frequency domain spacing between adjacent subcarriers being 12 subcarriers. Each terminal transmits a reference signal on the first subcarrier of all resource blocks (RBs). The data signals of 50 terminals are mapped onto the remaining 22 subcarriers in every two RBs, with each of the 100 RBs corresponding to 50 terminals. That is, within this resource block, each terminal transmits 100 x 70 reference signals at the same time-frequency location and 22 x 70 data signals at different time-frequency locations.

[0099] The reference signal transmitted by the kth terminal (i.e., terminal k) on the mth subcarrier of the nth OFDM symbol is: R(k,m,n) = 1*exp(jnθ(k)). That is, each terminal transmits the same reference signal on all 100 subcarriers of OFDM symbol 0. θ(k) = 2πk / 14, where k is the transmitting node (terminal) number, a non-negative integer less than 50, m is the subcarrier number of the reference signal, a non-negative integer less than 50, and n is the OFDM symbol number, a non-negative integer less than 70.

[0100] Exemplarily, as shown in FIG8 , there are four transmitting nodes (which can be any combination of terminals, base stations or application devices, and this example shows a case where all four transmitting nodes are terminals) (i.e., terminals 0 to 3 in the figure) transmitting data signals and reference signals on a resource block consisting of 14 OFDM symbols (i.e., the 0th OFDM symbol to the 13th OFDM symbol in the figure), each OFDM symbol containing 8 RBs (96 subcarriers).

[0101] Each terminal transmits reference signals on the same eight subcarriers within each of the seven OFDM symbols. The frequency-domain spacing between adjacent subcarriers within the eight subcarriers is 12 subcarriers, and the time-domain spacing between adjacent OFDM symbols within the seven OFDM symbols is one OFDM symbol. In OFDM symbols at odd symbol positions (i.e., OFDM symbols 0, 2, etc. in the figure), each terminal transmits reference signals on the first subcarrier of all resource blocks (RBs). The data signals of the four terminals are mapped onto the remaining 22 subcarriers within every two RBs, with each of the eight RBs from bottom to top corresponding to four terminals. In OFDM symbols at even symbol positions (i.e., OFDM symbols 1, 3, etc. in the figure), the data signals of the four terminals are mapped onto all subcarriers within every two RBs. This means that within this resource block, each terminal transmits 8*7 reference signals at the same time-frequency position and (22+24)*7 data signals at different time-frequency positions.

[0102] The reference signal transmitted by the kth terminal (also known as terminal k) on the mth subcarrier of the nth OFDM symbol (the OFDM symbol in which the reference signal is transmitted) is: R(k,m,n) = 1*exp(jnθ(k)). That is, each terminal transmits the same reference signal on the eight subcarriers of OFDM symbol 0. θ(k) = 2πk / 7, where k is the transmitting node (terminal) number, k = 0, 1, 2, 3; m is the reference signal subcarrier number, m = 0, 1, 2, 3; and n is the OFDM symbol number, n = 0, 1, 2, ..., 6.

[0103] Exemplarily, as shown in FIG9 , there are four transmitting nodes (which can be any combination of terminals, base stations or application devices, and this example shows a case where all are terminals) (i.e., terminals 0 to 3 in the figure) transmitting data signals and reference signals on a resource block consisting of 14 OFDM symbols (i.e., the 0th OFDM symbol to the 13th OFDM symbol in the figure), each OFDM symbol containing 8 RBs (96 subcarriers).

[0104] Each terminal transmits a reference signal on the same four subcarriers in each OFDM symbol, with the frequency domain spacing between adjacent subcarriers being 24 subcarriers. Each terminal transmits a reference signal on the first subcarrier of every two resource blocks (RBs). The data signals of the four terminals are mapped to the last 23 subcarriers within each two-RB. The frequency domain positions of the data of the four terminals vary across different OFDM symbols. That is, within this resource block, each terminal transmits 4*14 reference signals at the same time-frequency locations and 23*14 data signals at different time-frequency locations.

[0105] The reference signal transmitted by the kth terminal (i.e., terminal k) on the mth subcarrier of the nth OFDM symbol is: R(k,m,n) = 1*exp(jnθ(k)). That is, each terminal transmits the same reference signal on the four subcarriers of OFDM symbol 0. θ(k) = 2πk / 14, where k is the transmitting node (terminal) number, k = 0, 1, 2, 3, m is the reference signal subcarrier number, m = 0, 1, 2, 3, and n is the OFDM symbol number, n = 0, 1, 2, ... 13.

[0106] Exemplarily, as shown in FIG10 , there are three transmitting nodes (which can be any combination of terminals, base stations or application devices, and this example shows a case where all are terminals) (i.e., terminals 0 to 2 in the figure) transmitting data signals and reference signals on a resource block consisting of 14 OFDM symbols (i.e., the 0th OFDM symbol to the 13th OFDM symbol in the figure), each OFDM symbol containing 8 RBs (96 subcarriers).

[0107] Each terminal transmits a reference signal on the same four subcarriers in each OFDM symbol, with the frequency domain spacing between adjacent subcarriers being 24 subcarriers. Each terminal transmits a reference signal on the first subcarrier of every two resource blocks (RBs). The data of different terminals is mapped to different numbers of subcarriers in each OFDM symbol: 23*2 subcarriers for terminal 0 and 23 subcarriers for terminals 1 and 2. In other words, in this resource block, each terminal transmits 4*14 reference signals at the same time-frequency location, terminal 0 transmits 23*2*14 data signals, and terminal 1 and terminal 2 transmit 23*14 data signals.

[0108] The reference signal transmitted by the kth terminal (i.e., terminal k) on the mth subcarrier of the nth OFDM symbol is: R(k,m,n) = 1*exp(jnθ(k)). That is, each terminal transmits the same reference signal on the four subcarriers of OFDM symbol 0. θ(k) = 2πk / 14, where k is the transmitting node (terminal) number, k = 0, 1, 2, m is the reference signal subcarrier number, m = 0, 1, 2, and n is the OFDM symbol number, n = 0, 1, 2, ... 13.

[0109] Exemplarily, as shown in FIG11 , there are four transmitting nodes (which can be any combination of terminals, base stations or application devices, and this example shows a case of three terminals and one base station) (i.e., terminal 0 to terminal 2 and base station 0 in the figure) that transmit data signals and reference signals together on a resource block consisting of 14 OFDM symbols (i.e., the 0th OFDM symbol to the 13th OFDM symbol in the figure), each OFDM symbol containing 8 RBs (96 subcarriers).

[0110] Each terminal or base station transmits reference signals on the same four subcarriers in each OFDM symbol, with the frequency domain spacing between adjacent subcarriers being 24 subcarriers. Each terminal or base station transmits reference signals on the first subcarrier of every two resource blocks (RBs); data is mapped to the remaining subcarriers. That is, within this resource block, each terminal transmits 4*14 reference signals at the same time-frequency location and 23*14 data signals at different time-frequency locations.

[0111] The reference signal transmitted by the kth transmitting node (three terminals and one base station, a total of four transmitting nodes) on the mth subcarrier of the nth OFDM symbol is: R(k,m,n) = 1*exp(jnθ(k)). That is, each transmitting node transmits the same reference signal on the four subcarriers of the 0th OFDM symbol. θ(k) = 2πk / 14, where k is the transmitting node number, k = 0, 1, 2, 3, m is the reference signal subcarrier number, m = 0, 1, 2, 3, and n is the OFDM symbol number, n = 0, 1, 2, ... 13.

[0112] Exemplarily, as shown in FIG12 , there are 8 transmitting nodes (which can be any combination of terminals, base stations or application devices, and this example shows the case where all are terminals) (i.e., terminals 0 to 7 in the figure) transmitting data signals and reference signals on a resource block consisting of 14 OFDM symbols (i.e., the 0th OFDM symbol to the 13th OFDM symbol in the figure), each OFDM symbol containing 8 RBs (96 subcarriers).

[0113] Each terminal transmits a reference signal on the same eight subcarriers in each OFDM symbol, with the frequency domain spacing between adjacent subcarriers being 12 subcarriers. Each terminal transmits a reference signal on the first subcarrier of all resource blocks (RBs). The data signals of the eight terminals are mapped to the last 11 subcarriers within each RB, with each of the eight RBs from bottom to top corresponding to eight terminals. That is, within this resource block, each terminal transmits 8*14 reference signals at the same time-frequency location and 11*14 data signals at different time-frequency locations.

[0114] The reference signal transmitted by the kth terminal (i.e., terminal k) on the mth subcarrier of the nth OFDM symbol is: R(k,m,n) = R(k)*exp(jnθ(k)). That is, each terminal transmits the same reference signal on the eight subcarriers of OFDM symbol 0. θ(k) = 2πk / 14, where k is the transmitting node (terminal) number, k = 0, 1, 2, ... 7, m is the reference signal subcarrier number, m = 0, 1, 2, ... 7, and n is the OFDM symbol number, n = 0, 1, 2, ... 13.

[0115] The average power of the data signal is 1, and R(k) satisfies:

[0116] R(k)=1,k=0,1,2,3;

[0117] R(k)=2, k=4,5,6,7.

[0118] Exemplarily, as shown in FIG13 , there are 8 transmitting nodes (which can be any combination of terminals, base stations or application devices, and this example shows a case where all are terminals) (i.e., terminals 0 to 7 in the figure) transmitting data signals and reference signals on a resource block consisting of 14 OFDM symbols (i.e., the 0th OFDM symbol to the 13th OFDM symbol in the figure), each OFDM symbol containing 8 RBs (96 subcarriers).

[0119] Each terminal transmits a reference signal on the same eight subcarriers in each OFDM symbol, with the frequency domain spacing between adjacent subcarriers being 12 subcarriers. Each terminal transmits a reference signal on the first subcarrier of all resource blocks (RBs). The data signals of the eight terminals are mapped to the last 11 subcarriers within each RB, with each of the eight RBs from bottom to top corresponding to eight terminals. That is, within this resource block, each terminal transmits 8*14 reference signals at the same time-frequency location and 11*14 data signals at different time-frequency locations.

[0120] The reference signal transmitted by the kth terminal (i.e., terminal k) on the mth subcarrier of the nth OFDM symbol is: R(k,m,n) = 1*exp(jnθ(k)). That is, each terminal transmits the same reference signal on the eight subcarriers of the 0th OFDM symbol. k is the transmitting node (terminal) number, k = 0, 1, 2, ... 7, m is the reference signal subcarrier number, m = 0, 1, 2, ... 7, and n is the OFDM symbol number, n = 0, 1, 2, ... 13.

[0121] θ(k) is an element in the set {Θ|Θ=2πl / 14,l=0,1,...,13}, and different k corresponds to different θ(k). This example gives an example: when k=0, 1, 2,..., 7, θ(k) is 2π*5 / 14, 2π*2 / 14, 2π*8 / 14, 2π*7 / 14, 2π*3 / 14, 2π*6 / 14, 2π*11 / 14, and 2π*12 / 14 respectively.

[0122] Exemplarily, as shown in FIG14 , there are four transmitting nodes (which can be any combination of terminals, base stations or application devices, and this example shows a case where all are terminals) (i.e., terminals 0 to 3 in the figure) transmitting data signals and reference signals on a resource block consisting of 14 OFDM symbols (i.e., the 0th OFDM symbol to the 13th OFDM symbol in the figure), each OFDM symbol containing 8 RBs (96 subcarriers).

[0123] Each terminal transmits a reference signal on the same four subcarriers in each OFDM symbol, with the frequency domain spacing between adjacent subcarriers being 24 subcarriers. Each terminal transmits a reference signal on the first subcarrier of every two resource blocks (RBs). The data signals of the four terminals are mapped to the middle 22 subcarriers within each two RBs, and the other four terminals transmit other reference signals on the last subcarrier within each two RBs. Each of the eight RBs from bottom to top corresponds to four terminals. That is, within this resource block, each terminal transmits 4*14 reference signals at the same time-frequency location, 22*14 data signals at different time-frequency locations, and 1*14 other reference signals.

[0124] The reference signal transmitted by the kth terminal (i.e., terminal k) on the mth subcarrier of the nth OFDM symbol is: R(k,m,n) = 1*exp(jnθ(k)). That is, each terminal transmits the same reference signal on the four subcarriers of OFDM symbol 0. θ(k) = 2πk / 14, where k is the transmitting node (terminal) number, k = 0, 1, 2, 3; m is the reference signal subcarrier number, m = 0, 1, 2, 3; and n is the OFDM symbol number, n = 0, 1, 2, ..., 13.

[0125] Exemplarily, as shown in FIG15 , there are 7 transmitting nodes (the transmitting nodes can be any combination of terminals, base stations or application devices, and this example shows the case where all are terminals) (i.e., terminals 0 to 6 in the figure) transmitting data signals and reference signals on a resource block consisting of 14 OFDM symbols (i.e., the 0th OFDM symbol to the 13th OFDM symbol in the figure), each OFDM symbol containing 8 RBs (96 subcarriers).

[0126] Each terminal 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 terminal transmits a reference signal on the first subcarrier of all RBs; the other signals of the seven terminals (other signals may include data signals and / or reference signals of different types of the above-mentioned reference signals) are mapped to the last 11 subcarriers in each of the first seven RBs, with the seven RBs from bottom to top (i.e., RB 0 to RB 6) corresponding to seven terminals respectively. That is, on this resource block, each of the seven terminals transmits 8*14 reference signals at the same time-frequency position, and different terminals among the seven terminals transmit 11*14 data signals at different time-frequency positions.

[0127] The reference signal transmitted by the kth terminal (i.e., terminal k) on the mth subcarrier of the nth OFDM symbol is: R(k,m,n) = 1*exp(jnθ(k)). That is, each terminal transmits the same reference signal on the eight subcarriers of OFDM symbol 0. θ(k) = 2πk / 14, where k = 0, 1, 2, ..., 6, where k is the transmitting node (terminal) number; m = 0, 1, 2, ..., 7, where m is the reference signal subcarrier number; and n = 0, 1, 2, ..., 13, where n is the OFDM symbol number.

[0128] The K transmitting nodes may also transmit data signals superimposed on the same M subcarriers in the N OFDM symbols, and the phase angle of the data signal is different from the phase angles of all transmitting nodes.

[0129] In addition, there is another terminal that does not belong to the previous seven terminals. This terminal is denoted as terminal X. Terminal X transmits a reference signal on the same eight subcarriers in each OFDM symbol as the reference signals transmitted by the previous seven terminals. The interval between each two adjacent subcarriers in the eight subcarriers is 12 subcarriers. Other signals of terminal X (other signals may include data signals and / or reference signals of different types of the above reference signals) are mapped to the last 11 subcarriers in the last RB (i.e., the seventh RB).

[0130] The reference signal transmitted by terminal X on the mth subcarrier of the nth OFDM symbol is: R(k,m,n) = exp(j*2pi*4*m / 8)*exp(jnθ(k)). This means that terminal X transmits the same reference signal on the eight subcarriers of OFDM symbol 0. θ(k) = 2π / 14, m = 0, 1, 2, ..., 7, where m is the subcarrier number of the reference signal; and n = 0, 1, 2, ..., 13, where n is the OFDM symbol number. This means that the phase angle of terminal X is the same as that of terminal 2, but the corresponding reference signal R(k,m,0) transmitted on the mth subcarrier of the 0th time-domain symbol is different. Therefore, the reference signals of terminal X and terminal 2 are mapped to different time domains within the same Doppler domain.

[0131] Based on this, K transmitting nodes transmit reference signals on the same M subcarriers in N time domain symbols, and the frequency domain spacing between two adjacent subcarriers in the M subcarriers is Q subcarriers. This allows the receiving end to simultaneously obtain the channel information of the K different transmitting nodes in the reference signals on the N*M subcarriers, thereby perceiving the channel conditions of the entire wireless environment. At the same time, by adjusting the frequency domain spacing Q between two adjacent subcarriers in 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 signals to adapt to different communication scenarios. The phase difference of the reference signals transmitted by the kth transmitting node among the K transmitting nodes on the mth subcarriers of two adjacent time domain symbols in the N time domain symbols is the same as the phase angle θ(k). In this way, the reference signal of each transmitting node will not interfere with the transmission of the reference signals of other transmitting nodes during transmission. Moreover, these reference signals can also be used for channel estimation in communication without occupying additional time-frequency resources, which is conducive to improving spectrum efficiency.

[0132] 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.

[0133] 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.

[0134] 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.

[0135] 16 is a schematic structural diagram of a data transmission device 200 according to an embodiment of the present disclosure. The data transmission device 200 includes: a processing module 201 and a communication module 202.

[0136] The processing module 201 is configured to determine that K transmitting nodes transmit reference signals on the same M subcarriers in N time domain symbols.

[0137] Communication module 202 is used for K transmitting nodes to 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, K and Q are positive integers, and N and M are integers greater than 1; the phases of the reference signals transmitted by the kth transmitting node among the K transmitting nodes on the mth subcarrier of two adjacent time domain symbols in N time domain symbols differ by the same phase angle θ(k); k is the serial number of the transmitting node among the K transmitting nodes, m is the serial number of the subcarrier among the M subcarriers, k is a non-negative integer less than or equal to K, and m is a non-negative integer less than or equal to M.

[0138] In some embodiments, 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.

[0139] In some embodiments, 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.

[0140] In some embodiments, the phase angle θ(k) of different transmitting nodes among the K transmitting nodes is different.

[0141] In some embodiments, the phase angles θ(k) of different transmitting nodes among the K transmitting nodes are different, including: the phase angle θ(k) of the kth transmitting node among the K transmitting nodes is determined according to the value of k.

[0142] In some embodiments, the phase angle θ(k) of different transmitting nodes among the K transmitting nodes is different, including: the phase angle θ(k) of the kth transmitting node among the K transmitting nodes 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.

[0143] In some embodiments, different phase angles θ(k) of different transmitting nodes among the K transmitting nodes are different, including: the phase angles θ(k) of different transmitting nodes among the K transmitting nodes are each an element of 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.

[0144] In some embodiments, different transmitting nodes among the K transmitting nodes have different phase angles θ(k), including: different transmitting nodes among the K transmitting nodes each have a phase angle θ(k) being an element of 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, where i is a non-negative integer less than N-1, and N is greater than or equal to K.

[0145] 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 position in the N time domain symbols; and K transmitting nodes transmit reference signals on the same N*M subcarrier resources.

[0146] In some embodiments, the intervals between two adjacent time domain symbols in the N time domain symbols are the same.

[0147] In some embodiments, the N time-domain symbols are continuous in the time domain.

[0148] In some embodiments, the intervals between two adjacent subcarriers in the M subcarriers are the same.

[0149] In some embodiments, the communication module 202 is configured to transmit a reference signal in each resource block of N time domain symbols.

[0150] In some embodiments, the M subcarriers are continuous in the frequency domain.

[0151] In some embodiments, Q is an integer multiple of the number of subcarriers contained in a resource block.

[0152] In some embodiments, different transmitting nodes among the K transmitting nodes transmit different reference signals on other time domain symbols except the first time domain symbol.

[0153] In some embodiments, the reference signals transmitted by different transmitting nodes among the K transmitting nodes in the first time domain symbol are different or the same.

[0154] In some embodiments, phase differences of reference signals transmitted by different transmitting nodes among the K transmitting nodes in adjacent time domain symbols are different.

[0155] In some embodiments, the K transmitting nodes include at least one of the following: a terminal, a base station, and an application device.

[0156] In some embodiments, the same transmitting node among the K transmitting nodes transmits the same modulus value of the reference signal on the same M subcarriers in N time domain symbols.

[0157] In some embodiments, 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.

[0158] 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.

[0159] In some embodiments, the communication module 202 is configured for the K transmitting nodes to transmit other signals on subcarriers other than the M subcarriers on N time domain symbols.

[0160] In some embodiments, the communication module 202 is configured to have one transmitting node among the K transmitting nodes transmit other signals on different frequency domain resources of the N time domain symbols.

[0161] In some embodiments, the communication module 202 is configured to enable different transmitting nodes among the K transmitting nodes to transmit other signals on different frequency domain resources of N time domain symbols.

[0162] In some embodiments, a frequency domain resource bandwidth used by each of the K 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.

[0163] In some embodiments, the power of the reference signal is greater than or equal to the power of the other signals.

[0164] In some embodiments, the communication module 202 is configured to cause 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.

[0165] 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 17, 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.

[0166] 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.

[0167] 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).

[0168] 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.

[0169] 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.

[0170] In another implementation, the memory 301 may also be integrated with the processor 302 .

[0171] 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, FIG17 shows only one thick line, but this does not mean that there is only one bus or only one type of bus.

[0172] 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.

[0173] In an exemplary embodiment, the computer may be the aforementioned communication device, and the present disclosure does not limit the form of the computer.

[0174] 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.

[0175] 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.

[0176] In the technical solution provided by the embodiment of the present disclosure, K transmitting nodes 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. This is beneficial for the receiving end to simultaneously obtain the channel information of the K different transmitting nodes in the reference signals on the N*M subcarriers, and thus perceive the channel conditions of the entire wireless environment. 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, and then the frequency domain resources occupied by the transmitted reference signal can be adjusted to adapt to different communication scenarios. The phase difference of the reference signal transmitted by the kth transmitting node among the K transmitting nodes on the mth subcarrier of two adjacent time domain symbols in the N time domain symbols is the same as the phase angle θ(k), so that the reference signal of each transmitting node will not interfere with the transmission of the reference signal of other transmitting nodes during transmission. Moreover, these reference signals can also be used for channel estimation in communication without occupying additional time-frequency resources, which is conducive to improving spectrum efficiency.

[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: K 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, K and Q are positive integers, and N and M 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 subcarrier of 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 transmitting node among the K transmitting nodes, m is the serial number of the subcarrier among the M subcarriers, k is a non-negative integer less than or equal to K, and m is a non-negative integer less than or equal to M.

2. The method according to claim 1, wherein 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 whose sequence number of the time domain symbol is less than or equal to N.

3. 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 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 angle θ(k) of different transmitting nodes among the K transmitting nodes is different.

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

6. The method according to claim 4, wherein: The phase angles θ(k) of different transmitting nodes among the K transmitting nodes are different, including: the phase angle θ(k) of the kth transmitting node among the K transmitting nodes 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.

7. The method according to claim 4, wherein: The phase angles θ(k) of different transmitting nodes among the K transmitting nodes are different, including: the phase angles θ(k) of different transmitting nodes among the K transmitting nodes are respectively 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.

8. The method according to claim 4, wherein: The phase angle θ(k) of different transmitting nodes among the K transmitting nodes is different, including: the phase angle θ(k) of different transmitting nodes among the K transmitting nodes is respectively 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, where i is a non-negative integer less than N-1, and N is greater than or equal to K.

9. The method according to claim 1, wherein The K transmitting nodes transmitting reference signals on the same M subcarriers in the N time domain symbols, comprising: The M subcarriers have the same position in 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 to transmit 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 other time domain symbols except the first time domain symbol.

17. The method according to claim 1, wherein The reference signals transmitted by different transmitting nodes among the K transmitting nodes in the first time domain symbol are different or the same.

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

19. 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.

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

21. The method according to claim 1, wherein 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.

22. 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.

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

24. The method according to claim 23, wherein There is one transmitting node among the K transmitting nodes to transmit the other signal on different frequency domain resources of the N time domain symbols.

25. The method according to claim 23, wherein Different transmitting nodes among the K transmitting nodes transmit the other signals on different frequency domain resources of the N time domain symbols.

26. The method according to claim 23, wherein The frequency domain resource bandwidth used by each of the K 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.

27. The method according to claim 23, wherein The power of the reference signal is greater than or equal to the power of the other signals.

28. The method according to claim 1, wherein The K transmitting nodes transmit other signals except the reference signal by superimposing them 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.

29. 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; and when the processor executes the instructions, the method according to any one of claims 1 to 28 is performed.

30. 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 28.

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