Data transmission method, communication device, and storage medium

Abstract

The present disclosure provides a data transmission method, a communication device, and a storage medium. The data transmission method comprises: Kd transmitting nodes in a d-th group of transmitting nodes among D groups of transmitting nodes transmit reference signals on the same Mdsubcarriers in Nd time domain symbols, wherein the frequency domain interval between two adjacent subcarriers among the Md subcarriers is Qd subcarriers. The reference signals transmitted on the m-th subcarriers of two adjacent time domain symbols among the Nd time domain symbols by the k-th transmitting node in the d-th group of transmitting nodes differ in phase by the same phase angle θ (k,d).

Description

Data transmission method, communication device and storage medium

[0001] This application claims priority to Chinese patent application No. 202410358266.7, filed on March 26, 2024, the entire contents of which are incorporated by reference into this application. Technical Field

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

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

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

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

[0006] Summary of the Invention

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

[0008] In one aspect, a data transmission method is provided, the data transmission method comprising: transmitting nodes in a group D of K transmitting nodes; d There are N transmitting nodes d The same M in the time domain symbols d The reference signal is transmitted on M subcarriers. d The frequency domain interval between two adjacent subcarriers is Q d subcarriers, D, d, K d, Q d is a positive integer, N d 、M d is an integer greater than 1, and d is the serial number of the D group of transmitting nodes. The kth transmitting node in the dth group of transmitting nodes is in N d The phase difference of the reference signal transmitted on the m-th subcarrier of two adjacent time domain symbols in the time domain symbols is the same as the phase angle θ(k,d), where k is K d The serial number of the transmitting node, m is M d The subcarrier number.

[0009] On the other hand, a data transmission device is provided, which includes: a communication module for transmitting data in N d The same M in the time domain symbols d The reference signal is transmitted on M subcarriers. d The frequency domain interval between two adjacent subcarriers is Q d subcarriers, D, d, K d , Q d is a positive integer, N d 、M d is an integer greater than 1, and d is the serial number of the D group of transmitting nodes. The kth transmitting node in the dth group of transmitting nodes is in N d The phase difference of the reference signal transmitted on the m-th subcarrier of two adjacent time domain symbols in the time domain symbols is the same as the phase angle θ(k,d), where k is K d The serial number of the transmitting node, m is M d The subcarrier number.

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

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

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

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

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

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

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

[0017] FIG5 is a schematic diagram of yet another time-frequency resource according to an embodiment of the present disclosure.

[0018] FIG6 is a schematic diagram of yet another time-frequency resource according to an embodiment of the present disclosure.

[0019] FIG7 is a schematic diagram of yet another time-frequency resource according to an embodiment of the present disclosure.

[0020] FIG8 is a schematic diagram of yet another time-frequency resource according to an embodiment of the present disclosure.

[0021] FIG9 is a schematic diagram of yet another time-frequency resource according to an embodiment of the present disclosure.

[0022] FIG10 is a schematic diagram of yet another time-frequency resource according to an embodiment of the present disclosure.

[0023] FIG11 is a schematic diagram of yet another time-frequency resource according to an embodiment of the present disclosure.

[0024] FIG12 is a schematic structural diagram of a data transmission device according to an embodiment of the present disclosure.

[0025] FIG13 is a schematic structural diagram of a communication device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0026] 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.

[0027] 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 a way 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] In view of this, the present disclosure proposes a data transmission method. The data transmission method includes: K transmitting nodes in the dth group of D transmitting nodes d There are N transmitting nodes d The same M in the time domain symbols d The reference signal is transmitted on M subcarriers. d The frequency domain interval between two adjacent subcarriers is Q d subcarriers. The kth transmitting node in the dth group of transmitting nodes is in N d The phases of the reference signals transmitted on the m-th subcarriers of two adjacent time domain symbols in the time domain symbols differ by the same phase angle θ(k, d).

[0033] In this way, multiple transmitting nodes are divided into different groups of transmitting nodes. The symbol intervals of the reference signals transmitted by different groups of transmitting nodes can be different, and the positions and numbers of subcarriers can also be different. In a limited number of time domain symbols, the division of different groups can support more transmitting nodes. In addition, the kth transmitting node in the dth group of transmitting nodes is in N dThe phases of the reference signals transmitted on the mth subcarriers of two adjacent time-domain symbols in a time-domain symbol differ by the same phase angle θ(k, d). This helps reduce interference between reference signals transmitted by different transmitting nodes in the same group and allows the receiver to perform channel estimation for each transmitting node without occupying additional time-frequency resources, thereby improving spectrum efficiency.

[0034] 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).

[0035] The network architecture of the mobile communication network (including but not limited to 3G, 4G, 5G and future mobile communication networks) in the embodiment of the present disclosure may include at least a first communication node and a second communication node. It should be understood that in this example, in the downlink, the first communication node may be a network side device (for example, including but not limited to a base station), and the second communication node may be a terminal side device (for example, including but not limited to a terminal). Of course, in the uplink, the first communication node may also be a terminal side device, and the second communication node may also be a network side device. In the device-to-device communication between the two communication nodes, the first communication node and the second communication node may both be a base station or a terminal. The first communication node and the second communication node may be referred to as the first node and the second node, respectively.

[0036] 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 the number is not limited.

[0037] 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 called 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.

[0038] In some embodiments, a base station (BS) may be a base station or an evolved node B (eNB or eNodeB) in LTE or 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] The embodiment of the present disclosure provides a data transmission method. As shown in FIG2 , the method includes the following steps S101: K of the dth group of transmitting nodes in the D group of transmitting nodes d There are N transmitting nodes d The same M in the time domain symbols d The reference signal is transmitted on subcarriers.

[0043] M d The frequency domain interval between two adjacent subcarriers is Q d subcarriers, D, d, K d , Q d is a positive integer, N d 、M d is an integer greater than 1, and d is the serial number of the D group of transmitting nodes (for example, d is a non-negative integer less than or equal to D (that is, d is 0, 1, 2, ..., D-1 or d is 1, 2, 3, ..., D)). In this way, by adjusting M d The frequency domain spacing Q between two adjacent subcarriers in the subcarrier d , you can flexibly configure M d The position of the subcarriers in the frequency domain, and then adjust K d The frequency domain resources occupied by the reference signals transmitted by the transmitting nodes are adapted to different communication scenarios.

[0044] The kth transmitting node in the dth group of transmitting nodes is in N d The phase difference of the reference signal transmitted on the m-th subcarrier of two adjacent time domain symbols in the time domain symbols is the same as the phase angle θ(k,d), where k is K d The serial number of the transmitting node, m is M d For example, k is less than or equal to K d A non-negative integer (that is, k is 0, 1, 2, ..., K d -1 or k is 1, 2, 3, ..., K d ), m is less than or equal to M d A non-negative integer (that is, m is 0, 1, 2, ..., M d -1 or m is 1, 2, 3, ..., M dThis allows each transmitting node's reference signal to transmit without interfering with the reference signals of other transmitting nodes. Furthermore, these reference signals can also be used for channel estimation during communications, eliminating the need for additional time-frequency resources and improving spectrum efficiency.

[0045] In some embodiments, Q d It is an integer multiple of the number of subcarriers contained in a resource block.

[0046] Exemplarily, as shown in FIG3 , there are two groups of transmitting nodes, each group includes four transmitting nodes, which transmit data signals and reference signals on resource blocks (RBs) 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 RBs (96 subcarriers).

[0047] In Group 0 (including transmitting nodes 0 through 3), each transmitting node transmits reference signals on the same eight subcarriers in each OFDM symbol. The frequency domain spacing between two adjacent subcarriers is 12 subcarriers. In Group 0, each transmitting node transmits a reference signal on the 0th subcarrier (i.e., the first subcarrier) of all resource blocks (RBs). This means that in this resource block, each transmitting node in Group 0 transmits 8 x 14 reference signals at the same time-frequency location.

[0048] In Group 1 (including transmitting nodes 4 through 7), each transmitting node transmits reference signals on the same four subcarriers in each OFDM symbol. The frequency domain spacing between two adjacent subcarriers is 24 subcarriers. In Group 1, each transmitting node transmits a reference signal on the first subcarrier of every two resource blocks. That is, in this resource block, each transmitting node in Group 1 transmits 4*14 reference signals at the same time-frequency location.

[0049] In some embodiments, the kth transmitting node in the dth group of transmitting nodes is in N d The phase of the reference signal transmitted on the m-th subcarrier of the n-th time domain symbol in the time domain symbols is related to n, where n is less than or equal to N. d A non-negative integer (that is, n is 0, 1, 2, ..., N d -1 or n is 1,2,3,...,N d ).

[0050] In some embodiments, the phase of the reference signal transmitted by the kth transmitting node in the dth group of transmitting nodes on the mth subcarrier of the nth time domain symbol in N time domain symbols is monotonically increasing with an interval of θ(k,d). Furthermore, when θ(k,d) is a positive value, the phase of the reference signal transmitted by the kth transmitting node in the dth group of transmitting nodes on the mth subcarrier of the nth time domain symbol in N time domain symbols is positively correlated with n; when θ(k,d) is a negative value, the phase of the reference signal transmitted by the kth transmitting node in the dth group of transmitting nodes 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.

[0051] In some embodiments, the kth transmitting node in the dth group of transmitting nodes is in N d The reference signal transmitted on the m-th subcarrier of the n-th time domain symbol in the time domain symbols is R(k,m,n,d), then R(k,m,n,d)=R(k,m,0,d)*exp(jnθ(k,d)), where R(k,m,0,d) is the reference signal transmitted by the k-th transmitting node in the d-th group of transmitting nodes on the m-th subcarrier of the first time domain symbol.

[0052] In this way, in the dth group of transmitting nodes, the reference signal of each transmitting node is in the same N d *M d A special orthogonal multiplexing method is used for transmission on subcarriers to avoid mutual interference. For example, referring to Figure 3 again, in group 0, the reference signal transmitted by the k-th transmitting node (i.e., transmitting node k) on the m-th subcarrier of the n-th OFDM symbol is: R(k,m,n,0)=exp(j*pi*k / 2)*exp(jnθ(k,d)), that is, each transmitting node transmits a different reference signal on the 0th OFDM symbol (i.e., the first time domain symbol). θ(k,d)=2πk / 14, k is the transmitting node number, k is 0,1,2,...,3; m is the subcarrier number of the reference signal, m is 0,1,2,...,3; n is the OFDM symbol number, n is 0,1,2,...,13.

[0053] In group 1, the reference signal transmitted by the kth transmitting node (i.e., transmitting node k) on the mth subcarrier of the nth OFDM symbol is: R(k,m,n,1) = exp(j*pi*k / 2)*exp(jnθ(k,d)). That is, each transmitting node transmits a different reference signal in the 0th OFDM symbol (i.e., the first time-domain symbol). θ(k,d) = 2πk / 14, where k is the transmitting node number, which ranges from 0, 1, 2, ..., 3; m is the reference signal subcarrier number, which ranges from 0, 1, 2, ..., 3; and n is the OFDM symbol number, which ranges from 0, 1, 2, ..., 13.

[0054] In some embodiments, different transmitting nodes in the dth group of transmitting nodes have different phase angles θ(k, d). This can also be understood as the phase angle θ(k, d) corresponding to the kth transmitting node in the dth group of transmitting nodes being different for different values ​​of k. This allows different transmitting nodes in the dth group of transmitting nodes to transmit reference signals on the same N*M subcarriers, and helps reduce interference between reference signals.

[0055] In some embodiments, the phase angles θ(k, d) of different transmitting nodes in the dth group of transmitting nodes are different, including: the phase angle θ(k, d) of the kth transmitting node in the dth group of transmitting nodes is determined based on the value of k.

[0056] In some embodiments, the phase angles θ(k, d) of different transmitting nodes in the dth group of transmitting nodes are different, including: the phase angle θ(k, d) of the kth transmitting node in the dth group of transmitting nodes satisfies the formula θ(k, d)=2πkB / N d , B is a positive integer and is a system configuration parameter, N d Greater than or equal to B*K d , k is 0, 1, 2, ..., K d -1 or k is 1, 2, 3, ..., K d .

[0057] In some embodiments, the phase angle θ(k, d) of different transmitting nodes in the dth group of transmitting nodes is respectively an element in the phase angle set. The phase angle set includes at least K d Different elements, K d Different elements all satisfy the formula θ(k,d)=2πiB / N d , i is a non-negative integer and less than N d / B is the difference between the rounded value and 1, where B is a positive integer and a system configuration parameter. N d The difference between / B and 1 after rounding down can also be expressed as floor(N d / B)-1, floor() means round down.

[0058] In some embodiments, the phase angle θ(k, d) of different transmitting nodes in the dth group of transmitting nodes is respectively an element in the phase angle set. The phase angle set includes N d different elements, N d Different elements all satisfy the formula θ(k,d)=2πi / N d , i is less than N d A non-negative integer of -1, N d Greater than or equal to K d .

[0059] In some embodiments, resource elements (REs) occupied by reference signals transmitted by different groups of transmitting nodes in the D groups of transmitting nodes do not overlap.

[0060] In some embodiments, there is no overlap in the resource elements occupied by reference signals transmitted by different groups of transmitting nodes in the D group of transmitting nodes, including at least one of the following: there is no overlap in the subcarriers occupied by reference signals transmitted by different groups of transmitting nodes in the D group of transmitting nodes; there is no overlap in the symbols occupied by reference signals transmitted by different groups of transmitting nodes in the D group of transmitting nodes.

[0061] In this way, based on the different time-frequency domain positions of the reference signals designed in different groups, the reference signals transmitted by the transmitting nodes in different groups can be distinguished at the receiving end.

[0062] In some embodiments, different groups of transmitting nodes in the D groups of transmitting nodes include at least one identical transmitting node.

[0063] In some embodiments, the transmitting nodes included in different groups of transmitting nodes in the D group of transmitting nodes are not completely the same.

[0064] In some embodiments, different groups of transmitting nodes include the same or different numbers of transmitting nodes.

[0065] In some embodiments, the reference signals transmitted by different groups of transmitting nodes occupy the same or different numbers of symbols.

[0066] In some embodiments, the number of subcarriers on which reference signals transmitted by different groups of transmitting nodes are located is the same or different.

[0067] In some embodiments, the frequency domain intervals corresponding to the reference signals transmitted by different groups of transmitting nodes are the same or different, and the frequency domain interval is the number of subcarriers between two adjacent subcarriers among the subcarriers occupied by the reference signal.

[0068] In some embodiments, the reference signals transmitted by the same group of transmitting nodes correspond to the same frequency domain interval, where the frequency domain interval is the number of subcarriers between two adjacent subcarriers among the subcarriers occupied by the reference signals.

[0069] In some embodiments, reference signals transmitted by different transmitting nodes within the same group of transmitting nodes occupy the same number of symbols and / or the same number of subcarriers.

[0070] In some embodiments, there is one subcarrier in each resource block in N time domain symbols to transmit a reference signal.

[0071] For example, M d When the frequency domain interval between two adjacent subcarriers in the subcarriers is 12 subcarriers, there is one subcarrier in each resource block in the N time domain symbols to transmit a reference signal.

[0072] In some embodiments, the reference signals transmitted by the same group of transmitting nodes correspond to the same time domain symbol interval, where the time domain symbol interval is the interval between two adjacent time domain symbols in the time domain symbols occupied by the reference signal.

[0073] Exemplarily, the interval between two adjacent OFDM symbols in the OFDM symbols where the reference signals transmitted by the transmitting nodes in group D are located is 1 OFDM symbol.

[0074] In some embodiments, the time domain symbol intervals corresponding to the reference signals transmitted by different groups of transmitting nodes are the same or different, and the time domain symbol interval is the interval between two adjacent time domain symbols in the time domain symbols occupied by the reference signal.

[0075] In some embodiments, the reference signals transmitted by each group of transmitting nodes in the D groups of transmitting nodes occupy consecutive time domain symbols.

[0076] In some embodiments, K of the dth group of transmitting nodes d There are N transmitting nodes d The same M in the time domain symbols d Reference signals are transmitted on subcarriers, including: K d Different transmitting nodes among the transmitting nodes transmit different reference signals on the same time domain symbol except the first time domain symbol.

[0077] In some embodiments, K d A transmitting node includes at least one of the following: a terminal, a base station, and an application device (also referred to as a fixed transceiver device).

[0078] For example, K d The number of transmitting nodes is K d A terminal, or K d The number of transmitting nodes is K dbase stations, or K d Each transmitting node includes an application device, for example, the application device is one of the following: a router, customer premises equipment (CPE), a relay node, or a switch.

[0079] In some embodiments, the same transmitting node in the dth group of transmitting nodes is in N d The same M in the time domain symbols d The modulus value of the reference signal transmitted on each subcarrier is the same. The modulus value may also be called other names, such as amplitude, which is not limited in this disclosure.

[0080] In some embodiments, the same transmitting node in the dth group of transmitting nodes has the same M of the same time domain symbol. d The phase differences of the reference signals on adjacent subcarriers among the reference signals transmitted on the subcarriers are the same.

[0081] In some embodiments, the same transmitting node in the dth group of transmitting nodes has the same M of the same time domain symbol. d The reference signal transmitted on the subcarriers is the same. It can be understood that the same transmitting node in the dth group of transmitting nodes has the same M in the same time domain symbol. d The reference signal transmitted on the subcarriers has no phase offset, that is, M d The phases of the reference signals transmitted on adjacent subcarriers in the d-th group of transmitting nodes are the same or the phase difference is 0. d The reference signal transmitted on the subcarriers is independent of the value of m.

[0082] Exemplarily, assuming that the reference signal transmitted by the kth transmitting node in the dth group of transmitting nodes on the M subcarriers on the first time domain symbol can be expressed as R(k,m,0,d), R(k,m,0,d) is equal for different m values ​​when k remains unchanged.

[0083] Exemplarily, the reference signal transmitted by the kth transmitting node in the dth group of transmitting nodes on the M subcarriers on the nth time domain symbol can also be expressed as R(k,n,d)=R(k,0,d)*exp(jnθ(k,d)), where R(k,0,d) is the reference signal transmitted by the kth transmitting node in the dth group of transmitting nodes on the first time domain symbol.

[0084] In some embodiments, other signals are transmitted on subcarriers other than the subcarriers occupied by the transmitting nodes in group D for transmitting reference signals. 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.

[0085] For example, referring again to Figure 3 , in Group 0, each of the four transmitting nodes transmits a reference signal on the 0th subcarrier (i.e., the first subcarrier) of all RBs. The data signals of the four transmitting nodes (which may also include other reference signals) are mapped to the last 10 subcarriers of the first RB in every two RBs. From bottom to top, the four odd-numbered RBs (i.e., the 0th, 2nd, 4th, and 6th RBs in the figure) correspond to the four transmitting nodes. That is, on this resource block, each transmitting node in Group 0 transmits 8*14 reference signals at the same time-frequency location, and different transmitting nodes in Group 0 transmit 10*14 data signals at different time-frequency locations.

[0086] In some embodiments, there is a transmitting node in the dth group of transmitting nodes in N d Other signals are transmitted on different frequency domain resources of the time domain symbols. In this way, the interference generated between the other signals when multiple transmitting nodes transmit signals is reduced.

[0087] In Group 1, each of the four transmitting nodes transmits a reference signal on the first subcarrier of every two RBs. The data signals (which may also include other reference signals) of the four transmitting nodes are mapped to the last 11 subcarriers of the first RB in every two RBs. From bottom to top, the four even-numbered RBs (i.e., the first, third, fifth, and seventh RBs in the figure) correspond to each of the four transmitting nodes. In other words, on this resource block, each transmitting node in Group 1 transmits 4*14 reference signals at the same time-frequency location, while different transmitting nodes in Group 1 transmit 11*14 data signals at different time-frequency locations.

[0088] In some embodiments, different transmitting nodes in the dth group of transmitting nodes are in N d In this way, when the transmitting node needs to transmit more other signals, it can occupy N d Multiple frequency domain resources of time domain symbols are used to transmit other signals.

[0089] In some embodiments, the frequency domain resource bandwidth of each transmitting node in the dth group of transmitting nodes for transmitting other signals is less than M d The frequency domain spacing between the first and last subcarriers in a subcarrier.

[0090] In some embodiments, the power of the reference signal is greater than or equal to the power of the other signals.

[0091] 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.

[0092] In some embodiments, K in the dth group of transmitting nodes d There are N transmitting nodes d The same M in the time domain symbols d Other signals, in addition to the reference signal, are transmitted on subcarriers. The phase angles of these other signals differ from the phase angles of each transmitting node in the dth group. These other signals include data signals and may also include reference signals of a different type from the aforementioned reference signals. This allows data to be transmitted in available locations in the Doppler domain, in addition to those for transmitting the aforementioned reference signals, thereby improving spectrum resource utilization.

[0093] For example, as shown in Figure 4, there are two groups of transmitting nodes (which can be any combination of terminals, base stations, or application devices; this example shows all terminals) transmitting data signals and reference signals on resource blocks consisting of 14 OFDM symbols (i.e., OFDM symbols 0 to 13 in the figure), each of which contains 8 RBs (96 subcarriers). Group 0 contains three terminals (i.e., terminals 0 to 2 in the figure), and Group 1 contains five terminals (i.e., terminals 3 to 7 in the figure).

[0094] In Group 0, 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 0th subcarrier (i.e., the first subcarrier) of all resource blocks (RBs). The data signals (which may also include other reference signals) for the three terminals are mapped to the last 10, 11th, and 10th subcarriers of the first three RBs (RBs 0 through 2), respectively. Each of the three RBs from bottom to top corresponds to the three terminals. That is, on this resource block, each terminal in Group 0 transmits 8*14 reference signals at the same time-frequency location. Different terminals in Group 0 transmit data signals at different time-frequency locations. The three terminals transmit data signals of 10*14, 11*14, and 10*14, respectively.

[0095] In Group 1, 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 (which may also include other reference signals) for the five terminals are mapped to the last 11, 10, 11, 10, and 11 subcarriers within the last five RBs (RBs 3 through 7), respectively. Each of the five RBs from bottom to top corresponds to one terminal. That is, within this resource block, each terminal in Group 1 transmits 4*14 reference signals at the same time-frequency location. Different terminals in Group 1 transmit data signals at different time-frequency locations. The five terminals transmit data signals of 11*14, 10*14, 11*14, 10*14, and 11*14, respectively.

[0096] In group 0, 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(jnθ(k,d)). That is, each terminal transmits a different reference signal in OFDM symbol 0. θ(k,d) = 2πk / 14, where k is the transmitting node (terminal) number, a non-negative integer less than 3; m is the reference signal subcarrier number, which ranges from 0, 1, 2, ..., 7; and n is the OFDM symbol number, which ranges from 0, 1, 2, ..., 13.

[0097] In group 1, 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 / 4)*exp(jnθ(k,d)). That is, each terminal transmits a different reference signal in OFDM symbol 0. θ(k,d) = 2πk / 14, where k is the transmitting node (terminal) number, which ranges from 0, 1, 2, ..., 4; m is the reference signal subcarrier number, which ranges from 0, 1, 2, ..., 3; and n is the OFDM symbol number, which ranges from 0, 1, 2, ..., 13.

[0098] In addition, for each terminal in the two groups of terminals, the terminal in the group transmits other signals superimposed on the position where the terminal in the group transmits the reference signal, and the phase angle of the other signal is different from the phase angle of each terminal in the group of terminals.

[0099] For example, as shown in Figure 5, there are two groups of transmitting nodes (a transmitting node can be any combination of terminals, base stations, or application devices; this example shows all terminals). Each group contains eight terminals, transmitting data signals and reference signals on resource blocks consisting of 14 OFDM symbols (i.e., OFDM symbols 0 to 13 in the figure), each of which contains 8 RBs (96 subcarriers). Group 0 contains eight terminals (i.e., terminals 0 to 7 in the figure), and Group 1 contains eight terminals (i.e., terminals 8 to 15 in the figure).

[0100] In Group 0, 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 zeroth subcarrier (i.e., the first subcarrier) of all resource blocks (RBs). The data signals of the eight terminals (which may also include other reference signals) are mapped to the second to sixth subcarriers in each RB, with each of the eight RBs from bottom to top corresponding to eight terminals. That is, on this resource block, each terminal in Group 0 transmits 8*14 reference signals at the same time-frequency location, while different terminals in Group 0 transmit 5*14 data signals at different time-frequency locations.

[0101] In Group 1, 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 (which may also include other reference signals) are mapped to subcarriers 7 through 11 in each RB, with each of the eight RBs corresponding to eight terminals. This means that within this resource block, each terminal in Group 1 transmits 8 x 14 reference signals at the same time-frequency location, while different terminals in Group 1 transmit 5 x 14 data signals at different time-frequency locations.

[0102] In group 0, 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 / 8)*exp(jnθ(k,d)). That is, each terminal transmits a different reference signal in OFDM symbol 0. θ(k,d) = 2πk / 14, where k is the transmitting node (terminal) number and ranges from 0, 1, 2, ..., 7; m is the reference signal subcarrier number and ranges from 0, 1, 2, ..., 7; and n is the OFDM symbol number and ranges from 0, 1, 2, ..., 13.

[0103] In group 1, 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 / 8)*exp(jnθ(k,d)). That is, each terminal transmits a different reference signal in OFDM symbol 0. θ(k,d) = 2πk / 14, where k is the transmitting node (terminal) number and ranges from 0, 1, 2, ..., 7; m is the reference signal subcarrier number and ranges from 0, 1, 2, ..., 7; and n is the OFDM symbol number and ranges from 0, 1, 2, ..., 13.

[0104] For example, as shown in Figure 6, there are two groups of transmitting nodes (a transmitting node can be any combination of terminals, base stations, or application devices; this example shows all terminals). Each group contains four terminals, transmitting data signals and reference signals on resource blocks consisting of 14 OFDM symbols (i.e., OFDM symbols 0 to 13 in the figure), each of which contains 8 RBs (96 subcarriers). Group 0 contains four terminals (i.e., terminals 0 to 3 in the figure), and Group 1 contains four terminals (i.e., terminals 4 to 7 in the figure).

[0105] In Group 0, each terminal transmits a reference signal on the same four subcarriers in each OFDM symbol, with the frequency domain spacing between two adjacent subcarriers in the four subcarriers being 12 subcarriers. Each terminal transmits a reference signal on the first subcarrier of the first four RBs (i.e., RBs 0 to 3 in the figure). The data signals of the four terminals (which may also include other reference signals) are mapped to the last 11 subcarriers in each of the first four RBs, with each of the four RBs from bottom to top corresponding to four terminals. That is, on this resource block, each terminal in Group 0 transmits 4*14 reference signals at the same time-frequency position, and different terminals in Group 0 transmit 11*14 data signals at different time-frequency positions.

[0106] In Group 1, 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. Each terminal transmits a reference signal on the first subcarrier of the last four RBs (i.e., RBs 4 to 7 in the figure). The data signals of the four terminals (which may also include other reference signals) are mapped to the last 11 subcarriers in each of the last four RBs, with each of the four RBs from bottom to top corresponding to four terminals. That is, on this resource block, each terminal in Group 1 transmits 4*14 reference signals at the same time-frequency location, and different terminals in Group 1 transmit 11*14 data signals at different time-frequency locations.

[0107] In group 0, 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(jnθ(k,d)). That is, each terminal transmits a different reference signal in OFDM symbol 0. θ(k,d) = 2πk / 14, where k is the transmitting node (terminal) number, which ranges from 0, 1, 2, ..., 3; m is the reference signal subcarrier number, which ranges from 0, 1, 2, ..., 3; and n is the OFDM symbol number, which ranges from 0, 1, 2, ..., 13.

[0108] In group 1, 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(jnθ(k,d)). That is, each terminal transmits a different reference signal in OFDM symbol 0. θ(k,d) = 2πk / 14, where k is the transmitting node (terminal) number, which ranges from 0, 1, 2, ..., 3; m is the reference signal subcarrier number, which ranges from 0, 1, 2, ..., 3; and n is the OFDM symbol number, which ranges from 0, 1, 2, ..., 13.

[0109] Exemplarily, as shown in FIG7 , there are two groups of transmitting nodes (the transmitting nodes can be any combination of terminals, base stations or application devices, and this example shows a case where all are terminals). Group 0 includes 8 terminals (i.e., terminals 0 to 7 in the figure), and group 1 includes 4 terminals (i.e., terminals 8 to 11 in the figure). Data signals and reference signals are transmitted on resource blocks 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] In Group 0, each terminal transmits reference and data signals on the same eight subcarriers in every odd-numbered OFDM symbol (i.e., the 0th, 2nd, 4th, and so on in the figure). The frequency domain spacing between two adjacent subcarriers within these eight subcarriers is 12 subcarriers. Each terminal transmits a reference signal on the first subcarrier in each resource block (RB). The data signals for the eight terminals (which may also include other reference signals) are mapped to the last 11 subcarriers in each RB, with each of the eight RBs from bottom to top corresponding to eight terminals. That is, on this resource block, each terminal in Group 0 transmits 8*7 reference signals at the same time-frequency location, while different terminals in Group 0 transmit 11*7 data signals at different time-frequency locations.

[0111] In Group 1, each terminal transmits reference signals on the same four subcarriers in every even-numbered OFDM symbol (i.e., the first, third, fifth, and so on in the figure). The frequency domain spacing between adjacent subcarriers is 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 (which may also include other reference signals) are mapped to the last 23 subcarriers of every two RBs, with each of the eight RBs from bottom to top corresponding to four terminals. That is, on this resource block, each terminal in Group 1 transmits 4*7 reference signals at the same time-frequency location, while different terminals in Group 1 transmit 23*7 data signals at different time-frequency locations.

[0112] In group 0, the reference signal transmitted by the kth terminal (i.e., terminal k) on the mth subcarrier of the nth OFDM symbol (the OFDM symbol containing the reference signal) is: R(k,m,n) = exp(j*pi*k / 4)*exp(jnθ(k,d)). That is, each terminal transmits a different reference signal in OFDM symbol 0. θ(k,d) = 2πk / 14, where k is the transmitting node (terminal) number and ranges from 0, 1, 2, ..., 7; m is the reference signal subcarrier number and ranges from 0, 1, 2, ..., 7; and n is the OFDM symbol number and ranges from 0, 1, 2, ..., 13.

[0113] In group 1, the reference signal transmitted by the kth terminal (i.e., terminal k) on the mth subcarrier of the nth OFDM symbol (the OFDM symbol containing the reference signal) is: R(k,m,n) = exp(j*pi*k / 2)*exp(jnθ(k,d)). That is, each terminal transmits a different reference signal in OFDM symbol 0. θ(k,d) = 2πk / 14, where k is the transmitting node (terminal) number, which ranges from 0, 1, 2, ..., 3; m is the reference signal subcarrier number, which ranges from 0, 1, 2, ..., 3; and n is the OFDM symbol number, which ranges from 0, 1, 2, ..., 13.

[0114] Exemplarily, as shown in FIG8 , there are two groups of transmitting nodes (the transmitting nodes can be any combination of terminals, base stations or application devices, and this example shows a case where all are terminals). Group 0 contains 8 terminals (i.e., terminals 0 to 7 in the figure), and group 1 contains 4 terminals (i.e., terminals 8 to 11 in the figure). Data signals and reference signals are transmitted on resource blocks 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).

[0115] In Group 0, each terminal transmits reference and data signals on the same eight subcarriers in the first seven OFDM symbols (i.e., OFDM symbols 0 to 6 in the figure). The frequency domain spacing between two adjacent subcarriers in the eight subcarriers is 12 subcarriers. Each terminal transmits a reference signal on the first subcarrier in each resource block (RB). The data signals of the eight terminals (which may also include other reference signals) are mapped to the last 11 subcarriers in each RB, with each of the eight RBs from bottom to top corresponding to eight terminals. That is, on this resource block, each terminal in Group 0 transmits 8*7 reference signals at the same time-frequency location, and different terminals in Group 0 transmit 11*7 data signals at different time-frequency locations.

[0116] In Group 1, each terminal transmits a reference signal on the same four subcarriers in the last seven OFDM symbols (i.e., OFDM symbols 7 to 13 in the figure). The frequency domain spacing between two adjacent subcarriers in the four subcarriers is 24 subcarriers. Each terminal transmits a reference signal on the first subcarrier in every two resource blocks (RBs). The data signals of the four terminals (which may also include other reference signals) are mapped to the last 23 subcarriers in every two RBs, with each of the eight RBs from bottom to top corresponding to four terminals. That is, on this resource block, each terminal in Group 1 transmits 4*7 reference signals at the same time-frequency location, and different terminals in Group 1 transmit 23*7 data signals at different time-frequency locations.

[0117] In group 0, the reference signal transmitted by the kth terminal (i.e., terminal k) on the mth subcarrier of the nth OFDM symbol (the OFDM symbol containing the reference signal) is: R(k,m,n) = exp(j*pi*k / 4)*exp(jnθ(k,d)). That is, each terminal transmits a different reference signal in OFDM symbol 0. θ(k,d) = 2πk / 14, where k is the transmitting node (terminal) number and ranges from 0, 1, 2, ..., 7; m is the reference signal subcarrier number and ranges from 0, 1, 2, ..., 7; and n is the OFDM symbol number and ranges from 0, 1, 2, ..., 13.

[0118] In group 1, the reference signal transmitted by the kth terminal (i.e., terminal k) on the mth subcarrier of the nth OFDM symbol (the OFDM symbol containing the reference signal) is: R(k,m,n) = exp(j*pi*k / 2)*exp(jnθ(k,d)). That is, each terminal transmits a different reference signal in OFDM symbol 0. θ(k,d) = 2πk / 14, where k is the transmitting node (terminal) number, which ranges from 0, 1, 2, ..., 3; m is the reference signal subcarrier number, which ranges from 0, 1, 2, ..., 3; and n is the OFDM symbol number, which ranges from 0, 1, 2, ..., 13.

[0119] Exemplarily, as shown in FIG9 , there are two groups of transmitting nodes (the transmitting nodes can be any combination of terminals, base stations or application devices, and this example shows a case where all are terminals). Group 0 contains 8 terminals and group 1 contains 4 terminals. Data signals and reference signals are transmitted 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).

[0120] In Group 0, each terminal transmits reference signals and data signals on the same eight subcarriers in every odd-numbered OFDM symbol (i.e., the 0th, 2nd, 4th, and so on in the figure). The frequency domain spacing between two adjacent subcarriers in the 8 subcarriers is 12 subcarriers. Each terminal transmits a reference signal on the 0th subcarrier (i.e., the first subcarrier) in each resource block (RB). The data signals of the eight terminals (which may also include other reference signals) are mapped to the last 11 subcarriers in each RB, with each of the eight RBs from bottom to top corresponding to eight terminals. That is, on this resource block, each terminal in Group 0 transmits 8*7 reference signals at the same time-frequency location, while different terminals in Group 0 transmit 11*7 data signals at different time-frequency locations.

[0121] In Group 1, each terminal transmits reference signals on the same four subcarriers in every even-numbered OFDM symbol (i.e., the first, third, fifth, and so on in the figure). The frequency domain spacing between adjacent subcarriers is 24 subcarriers. Each terminal transmits a reference signal on the first subcarrier of every two resource blocks (RBs) (i.e., the subcarrier adjacent to the first RB subcarrier). The data signals of the four terminals (which may also include other reference signals) are mapped to the remaining 23 subcarriers in every two RBs, with each of the eight RBs from bottom to top corresponding to four terminals. That is, on this resource block, each terminal in Group 1 transmits 4*7 reference signals at the same time-frequency location, while different terminals in Group 1 transmit 23*7 data signals at different time-frequency locations.

[0122] In group 0, the reference signal transmitted by the kth terminal (i.e., terminal k) on the mth subcarrier of the nth OFDM symbol (the OFDM symbol containing the reference signal) is: R(k,m,n) = exp(j*pi*k / 4)*exp(jnθ(k,d)). That is, each terminal transmits a different reference signal in OFDM symbol 0. θ(k,d) = 2πk / 14, where k is the transmitting node (terminal) number and ranges from 0, 1, 2, ..., 7; m is the reference signal subcarrier number and ranges from 0, 1, 2, ..., 7; and n is the OFDM symbol number and ranges from 0, 1, 2, ..., 6.

[0123] In group 1, the reference signal transmitted by the kth terminal (i.e., terminal k) on the mth subcarrier of the nth OFDM symbol (the OFDM symbol containing the reference signal) is: R(k,m,n) = exp(j*pi*k / 2)*exp(jnθ(k,d)). That is, each terminal transmits a different reference signal in OFDM symbol 0. θ(k,d) = 2πk / 14, where k is the transmitting node (terminal) number, which ranges from 0, 1, 2, ..., 3; m is the reference signal subcarrier number, which ranges from 0, 1, 2, ..., 3; and n is the OFDM symbol number, which ranges from 0, 1, 2, ..., 6.

[0124] For example, as shown in Figure 10, there are three groups of transmitting nodes (a transmitting node can be any combination of terminals, base stations, or application devices; this example shows all terminals), each group containing 4, 2, and 2 terminals, respectively. Data signals and reference signals are transmitted on resource blocks consisting of 14 OFDM symbols (i.e., OFDM symbols 0 to 13 in the figure), each OFDM symbol containing 8 RBs (96 subcarriers). Group 0 contains 4 terminals (i.e., terminals 0 to 3 in the figure), group 1 contains 2 terminals (i.e., terminals 4 to 5 in the figure), and group 2 contains 2 terminals (i.e., terminals 6 to 7 in the figure).

[0125] In Group 0, 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. Each terminal transmits a reference signal on the zeroth subcarrier (i.e., the first subcarrier) of all resource blocks (RBs). The data signals (which may also include other reference signals) for the four terminals are mapped to the last nine, eleventh, tenth, and eleventh subcarriers of the first four resource blocks (RBs 0 through 3 in the figure), respectively. Each of the four RBs from bottom to top corresponds to each of the four terminals. That is, on this resource block, each terminal in Group 0 transmits an 8x14 reference signal at the same time-frequency location. Different terminals in Group 0 transmit data signals at different time-frequency locations. The four terminals transmit data signals of 9x14, 11x14, 10x14, and 11x14, respectively.

[0126] In Group 1, 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 two terminals (which may also include other reference signals) are mapped to the last nine and eleven subcarriers of the fourth and fifth RBs, respectively, with these two RBs corresponding to the two terminals. That is, on this resource block, each terminal in Group 1 transmits 4*14 reference signals at the same time-frequency location, while different terminals in Group 1 transmit data signals at different time-frequency locations, with the two terminals transmitting 9*14 and 11*14 data signals, respectively.

[0127] In the second group, each terminal transmits a reference signal on the same two subcarriers in each OFDM symbol, with the frequency domain spacing between adjacent subcarriers being 48 subcarriers. Each terminal transmits a reference signal on the second subcarrier of every four resource blocks (RBs). The data signals of the two terminals (which may also include other reference signals) are mapped to the last 10 and 11 subcarriers of the sixth and seventh resource blocks, respectively, with these two RBs corresponding to the two terminals. That is, in this resource block, each terminal in the second group transmits 2*14 reference signals at the same time-frequency location. In the third group, different terminals transmit data signals at different time-frequency locations, with the two terminals transmitting 10*14 and 11*14 data signals at different time-frequency locations, respectively.

[0128] In group 0, 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(jnθ(k,d)). That is, each terminal transmits a different reference signal in OFDM symbol 0. θ(k,d) = 2πk / 14, where k is the transmitting node (terminal) number, which ranges from 0, 1, 2, ..., 3; m is the reference signal subcarrier number, which ranges from 0, 1, 2, ..., 7; and n is the OFDM symbol number, which ranges from 0, 1, 2, ..., 13.

[0129] In group 1, 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(jnθ(k,d)). That is, each terminal transmits a different reference signal in OFDM symbol 0. θ(k,d) = 2πk / 14, where k is the transmitting node (terminal) number, which ranges from 0 to 1; m is the reference signal subcarrier number, which ranges from 0, 1, 2, ..., 3; and n is the OFDM symbol number, which ranges from 0, 1, 2, ..., 13.

[0130] In group 2, 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(jnθ(k,d)). That is, each terminal transmits a different reference signal in OFDM symbol 0. θ(k,d) = 2πk / 14, where k is the transmitting node (terminal) number, which ranges from 0 to 1; m is the reference signal subcarrier number, which ranges from 0 to 1; and n is the OFDM symbol number, which ranges from 0 to 1, 1 to 2, ..., 13.

[0131] For example, as shown in Figure 11, there are seven transmitting nodes (which can be any combination of terminals, base stations, or application devices; this example shows all terminals), denoted as terminals 0 to 6, divided into two groups. Group 0 consists of terminals 0 to 3, and Group 1 consists of terminals 3 to 6, meaning that terminal 3 is present in both groups. These two groups of terminals transmit data signals and reference signals on resource blocks consisting of 14 OFDM symbols (i.e., OFDM symbols 0 to 13 in the figure), each of which contains 8 RBs (96 subcarriers).

[0132] In Group 0, 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 0th subcarrier (i.e., the first subcarrier) of all resource blocks (RBs). The data signals of the four terminals (which may also include other reference signals) are mapped to the last 10, 11th, 10th, and 11th subcarriers of the first four resource blocks (RBs 0 through 3 in the figure), respectively. Each of the four RBs from bottom to top corresponds to one terminal. That is, on this resource block, each terminal in Group 0 transmits an 8x14 reference signal at the same time-frequency location. Different terminals in Group 0 transmit data signals at different time-frequency locations. The four terminals transmit data signals of 10x14, 11x14, 10x14, and 11x14, respectively.

[0133] In Group 1, 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 (which may also include other reference signals) for the four terminals are mapped to the last 10, 11, 10, and 11 subcarriers in the last four resource blocks (RBs 4 through 7 in the figure), respectively. Each of the four RBs from bottom to top corresponds to one terminal. That is, in this resource block, each terminal in Group 1 transmits 4*14 reference signals at the same time-frequency location. Different terminals in Group 1 transmit data signals at different time-frequency locations. The four terminals transmit data signals of 10*14, 11*14, 10*14, and 11*14, respectively.

[0134] In group 0, 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(jnθ(k,d)). That is, each terminal transmits a different reference signal in OFDM symbol 0. θ(k,d) = 2πk / 14, where k is the transmitting node (terminal) number, which ranges from 0, 1, 2, ..., 3; m is the reference signal subcarrier number, which ranges from 0, 1, 2, ..., 7; and n is the OFDM symbol number, which ranges from 0, 1, 2, ..., 13.

[0135] In group 1, 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(jnθ(k,d)). That is, each terminal transmits a different reference signal in OFDM symbol 0. θ(k,d) = 2πk / 14, where k is the transmitting node (terminal) number, which ranges from 0, 1, 2, ..., 3; m is the reference signal subcarrier number, which ranges from 0, 1, 2, ..., 3; and n is the OFDM symbol number, which ranges from 0, 1, 2, ..., 13.

[0136] Based on this, multiple transmitting nodes are divided into different groups of transmitting nodes. The symbol intervals of the reference signals transmitted by different groups of transmitting nodes can be different, and the positions and numbers of subcarriers can also be different. In a limited number of time domain symbols, the division of different groups can support more transmitting nodes. In addition, the kth transmitting node in the dth group of transmitting nodes is in N d The phases of the reference signals transmitted on the mth subcarriers of two adjacent time-domain symbols differ by the same phase angle θ(k, d). This helps reduce interference between reference signals transmitted by different transmitting nodes in the same group. This also allows the receiver to perform channel estimation for each transmitting node without occupying additional time-frequency resources, thereby improving spectrum efficiency.

[0137] 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.

[0138] 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.

[0139] 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.

[0140] FIG12 is a schematic diagram of the structure of a data transmission device according to an embodiment of the present disclosure. The data transmission device 200 includes: a processing module 201 and a communication module 202 .

[0141] Processing module 201, configured to determine K of the d-th group of transmitting nodes in the D group of transmitting nodes d There are N transmitting nodes d The same M in the time domain symbols d The reference signal is transmitted on subcarriers.

[0142] Communication module 202, for K transmitting nodes in the dth group of transmitting nodes in the D group d There are N transmitting nodes d The same M in the time domain symbols d The reference signal is transmitted on M subcarriers. d The frequency domain interval between two adjacent subcarriers is Q d subcarriers, D, d, K d , Q d is a positive integer, N d 、M d is an integer greater than 1, and d is the sequence number of the transmitting node in group D.

[0143] The kth transmitting node in the dth group of transmitting nodes is in N d The phase difference of the reference signal transmitted on the m-th subcarrier of two adjacent time domain symbols in the time domain symbols is the same as the phase angle θ(k,d), where k is K d The serial number of the transmitting node, m is M d The subcarrier number.

[0144] In some embodiments, the kth transmitting node in the dth group of transmitting nodes is in N d The phase of the reference signal transmitted on the m-th subcarrier of the n-th time domain symbol in the time domain symbols is positively correlated with n, and n is less than or equal to N d A non-negative integer.

[0145] In some embodiments, the kth transmitting node in the dth group of transmitting nodes is in N d The reference signal transmitted on the m-th subcarrier of the n-th time domain symbol in the time domain symbols is R(k,m,n,d), then R(k,m,n,d)=R(k,m,0,d)*exp(jnθ(k,d)), where R(k,m,0,d) is the reference signal transmitted by the k-th transmitting node in the d-th group of transmitting nodes on the m-th subcarrier of the first time domain symbol.

[0146] In some embodiments, the phase angles θ(k,d) of different transmitting nodes in the dth group of transmitting nodes are different.

[0147] In some embodiments, resource elements occupied by reference signals transmitted by different groups of transmitting nodes in the D groups of transmitting nodes do not overlap.

[0148] In some embodiments, the resource elements occupied by the reference signals transmitted by different groups of transmitting nodes in the D group of transmitting nodes do not overlap, including at least one of the following: the subcarriers occupied by the reference signals transmitted by different groups of transmitting nodes in the D group of transmitting nodes do not overlap; the symbols occupied by the reference signals transmitted by different groups of transmitting nodes in the D group of transmitting nodes do not overlap.

[0149] In some embodiments, different groups of transmitting nodes in the D groups of transmitting nodes include at least one identical transmitting node.

[0150] In some embodiments, the transmitting nodes included in different groups of transmitting nodes in the D group of transmitting nodes are not completely the same.

[0151] In some embodiments, reference signals transmitted by different transmitting nodes within the same group of transmitting nodes occupy the same number of symbols and / or the same number of subcarriers.

[0152] In some embodiments, different groups of transmitting nodes include the same or different numbers of transmitting nodes.

[0153] In some embodiments, the reference signals transmitted by different groups of transmitting nodes occupy the same or different numbers of symbols.

[0154] In some embodiments, the number of subcarriers on which reference signals transmitted by different groups of transmitting nodes are located is the same or different.

[0155] In some embodiments, the reference signals transmitted by the same group of transmitting nodes correspond to the same frequency domain interval, where the frequency domain interval is the number of subcarriers between two adjacent subcarriers among the subcarriers occupied by the reference signals.

[0156] In some embodiments, the frequency domain intervals corresponding to the reference signals transmitted by different groups of transmitting nodes are the same or different. The frequency domain interval is the number of subcarriers between two adjacent subcarriers among the subcarriers occupied by the reference signal.

[0157] In some embodiments, there is one subcarrier in each resource block in N time domain symbols to transmit a reference signal.

[0158] In some embodiments, Q d It is an integer multiple of the number of subcarriers contained in a resource block.

[0159] In some embodiments, the reference signals transmitted by the same group of transmitting nodes correspond to the same time domain symbol interval, where the time domain symbol interval is the interval between two adjacent time domain symbols in the time domain symbols occupied by the reference signal.

[0160] In some embodiments, the time domain symbol intervals corresponding to the reference signals transmitted by different groups of transmitting nodes are the same or different, and the time domain symbol interval is the interval between two adjacent time domain symbols in the time domain symbols occupied by the reference signal.

[0161] In some embodiments, the reference signals transmitted by each group of transmitting nodes in the D groups of transmitting nodes occupy consecutive time domain symbols.

[0162] In some embodiments, the phase angles θ(k, d) of different transmitting nodes in the dth group of transmitting nodes are different, including: the phase angle θ(k, d) of the kth transmitting node in the dth group of transmitting nodes is determined based on the value of k.

[0163] In some embodiments, the phase angles θ(k, d) of different transmitting nodes in the dth group of transmitting nodes are different, including: the phase angle θ(k, d) of the kth transmitting node in the dth group of transmitting nodes satisfies the formula θ(k, d)=2πkB / N d , B is a positive integer and is a system configuration parameter, N d Greater than or equal to B*K d , k is 0, 1, 2, ..., K d -1.

[0164] In some embodiments, the phase angle θ(k, d) of different transmitting nodes in the dth group of transmitting nodes is respectively an element in the phase angle set. The phase angle set includes at least K d Different elements, K d Different elements all satisfy the formula θ(k,d)=2πiB / N d , i is a non-negative integer and less than N d The difference between / B rounded down and 1.

[0165] In some embodiments, the phase angle θ(k, d) of different transmitting nodes in the dth group of transmitting nodes is respectively an element in a phase angle set, and the phase angle set includes N d different elements, N d Different elements all satisfy the formula θ(k,d)=2πi / N d , i is less than N d A non-negative integer of -1, N d Greater than or equal to K d .

[0166] In some embodiments, K of the dth group of transmitting nodes d There are N transmitting nodes d The same M in the time domain symbols d Reference signals are transmitted on subcarriers, including: K d Different transmitting nodes among the transmitting nodes transmit different reference signals on the same time domain symbol except the first time domain symbol.

[0167] In some embodiments, the K transmitting nodes include at least one of the following: a terminal, a base station, and an application device.

[0168] In some embodiments, the same transmitting node in the dth group of transmitting nodes is in N d The same M in the time domain symbols d The modulus values ​​of the reference signals transmitted on the subcarriers are the same.

[0169] In some embodiments, the same transmitting node in the dth group of transmitting nodes has the same M of the same time domain symbol. d The phase differences of the reference signals on adjacent subcarriers among the reference signals transmitted on the subcarriers are the same.

[0170] In some embodiments, the same transmitting node in the dth group of transmitting nodes has the same M of the same time domain symbol. d The reference signals transmitted on the subcarriers are the same.

[0171] In some embodiments, the communication module 202 is configured to transmit other signals on subcarriers other than the subcarriers occupied by the D group of transmitting nodes for transmitting reference signals.

[0172] In some embodiments, there is a transmitting node in the dth group of transmitting nodes in N d Other signals are transmitted on different frequency domain resources of the time domain symbols.

[0173] In some embodiments, different transmitting nodes in the dth group of transmitting nodes are in N d Other signals are transmitted on different frequency domain resources of the time domain symbols.

[0174] In some embodiments, the frequency domain resource bandwidth of each transmitting node in the dth group of transmitting nodes for transmitting other signals is less than M d The frequency domain spacing between the first and last subcarriers in a subcarrier.

[0175] In some embodiments, the power of the reference signal is greater than or equal to the power of the other signals.

[0176] In some embodiments, the communication module 202 is used for the K transmitting nodes in the dth group d There are N transmitting nodes d The same M in the time domain symbols d Other signals except the reference signal are transmitted on subcarriers, and the phase angles of the other signals are different from the phase angle of each transmitting node in the dth group.

[0177] 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 13, 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.

[0178] 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.

[0179] The communication interface 303 is used to connect to other devices via a communication network, such as Ethernet, wireless access network, wireless local area network (WLAN), etc.

[0180] 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.

[0181] As an implementation, the memory 301 can exist independently of the processor 302. The memory 301 can be connected to the processor 302 via a bus 304 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.

[0182] In another possible implementation, the memory 301 and the processor 302 may also be integrated together.

[0183] 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, FIG13 shows only one thick line, but this does not mean that there is only one bus or only one type of bus.

[0184] 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.

[0185] In an exemplary embodiment, the computer may be the aforementioned communication device, and the present disclosure does not limit the specific form of the computer.

[0186] 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.

[0187] 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.

[0188] In the technical solution provided by the embodiment of the present disclosure, multiple transmitting nodes are divided into different groups of transmitting nodes. The symbol intervals of the reference signals transmitted by the transmitting nodes in different groups can be different, and the positions and numbers of subcarriers can also be different. In a limited number of time domain symbols, the division of different groups can support more transmitting nodes. In addition, the kth transmitting node in the dth group of transmitting nodes is in N d The phases of the reference signals transmitted on the mth subcarriers of two adjacent time-domain symbols differ by the same phase angle θ(k, d). This helps reduce interference between reference signals transmitted by different transmitting nodes in the same group. This also allows the receiver to perform channel estimation for each transmitting node without occupying additional time-frequency resources, thereby improving spectrum efficiency.

[0189] 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 of the d-th group of transmitting nodes in the D-group transmitting nodes d There are N transmitting nodes d The same M in the time domain symbols d The reference signal is transmitted on M subcarriers. d The frequency domain interval between two adjacent subcarriers is Q d subcarriers, D, d, K d , Q d is a positive integer, N d 、M d is an integer greater than 1, and d is the sequence number of the transmitting node in group D; The kth transmitting node in the dth group of transmitting nodes is in the N d The phase difference of the reference signals transmitted on the m-th subcarrier of two adjacent time domain symbols in the time domain symbols is the same as the phase angle θ(k,d), where k is the K d The serial number of the transmitting node, m is the M d The subcarrier number.

2. The method according to claim 1, wherein The kth transmitting node in the dth group of transmitting nodes is located in the N d The phase of the reference signal transmitted on the m-th subcarrier of the n-th time domain symbol in the time domain symbols is positively correlated with n, and n is less than or equal to N d A non-negative integer.

3. The method according to claim 1, wherein The kth transmitting node in the dth group of transmitting nodes is located in the N d The reference signal transmitted on the m-th subcarrier of the n-th time domain symbol in the time domain symbols is R(k,m,n,d), then R(k,m,n,d)=R(k,m,0,d)*exp(jnθ(k,d)), where R(k,m,0,d) is the reference signal transmitted by the k-th transmitting node in the d-th group of transmitting nodes on the m-th subcarrier of the first time domain symbol.

4. The method according to claim 1, wherein The phase angles θ(k, d) of different transmitting nodes in the dth group of transmitting nodes are different.

5. The method according to claim 1, wherein Resource elements occupied by reference signals transmitted by different groups of transmitting nodes in the D groups of transmitting nodes do not overlap.

6. The method according to claim 5, wherein: Resource elements occupied by reference signals transmitted by different groups of transmitting nodes in the D group of transmitting nodes do not overlap, including at least one of the following: There is no overlap in subcarriers occupied by reference signals transmitted by different groups of transmitting nodes in the D group of transmitting nodes; Symbols occupied by reference signals transmitted by different groups of transmitting nodes in the D groups of transmitting nodes do not overlap.

7. The method according to claim 1, wherein There are different groups of transmitting nodes in the D group of transmitting nodes, including at least one identical transmitting node.

8. The method according to claim 1, wherein The transmitting nodes included in different groups of transmitting nodes in the D group of transmitting nodes are not completely the same.

9. The method according to claim 1, wherein The reference signals transmitted by different transmitting nodes in the same group of transmitting nodes occupy the same number of symbols and / or the same number of subcarriers.

10. The method according to claim 1, wherein Different groups of transmitting nodes may contain the same or different numbers of transmitting nodes.

11. The method according to claim 1, wherein The number of symbols occupied by reference signals transmitted by transmitting nodes in different groups is the same or different.

12. The method according to claim 1, wherein The number of subcarriers where reference signals transmitted by transmitting nodes in different groups are located is the same or different.

13. The method according to claim 1, wherein The reference signals transmitted by the same group of transmitting nodes have the same frequency domain interval corresponding to them. The frequency domain interval is the number of subcarriers between two adjacent subcarriers among the subcarriers occupied by the reference signals.

14. The method according to claim 1, wherein The frequency domain intervals corresponding to the reference signals transmitted by different groups of transmitting nodes are the same or different. The frequency domain interval is the number of subcarriers between two adjacent subcarriers among the subcarriers occupied by the reference signal.

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

16. The method according to claim 1, wherein The Q d It is an integer multiple of the number of subcarriers contained in a resource block.

17. The method according to claim 1, wherein The time domain symbol intervals corresponding to the reference signals transmitted by the same group of transmitting nodes are the same, and the time domain symbol interval is the interval between two adjacent time domain symbols in the time domain symbols occupied by the reference signals.

18. The method according to claim 1, wherein The time domain symbol intervals corresponding to the reference signals transmitted by different groups of transmitting nodes are the same or different, and the time domain symbol interval is the interval between two adjacent time domain symbols in the time domain symbols occupied by the reference signal.

19. The method according to claim 1, wherein The reference signal transmitted by each group of transmitting nodes in the D groups of transmitting nodes occupies continuous time domain symbols.

20. The method according to claim 4, wherein The phase angles θ(k, d) of different transmitting nodes in the dth group of transmitting nodes are different, including: the phase angle θ(k, d) of the kth transmitting node in the dth group of transmitting nodes is determined based on the value of k.

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

22. The method according to claim 4, wherein The phase angle θ(k, d) of different transmitting nodes in the dth group of transmitting nodes is respectively an element in a phase angle set, and the phase angle set includes at least K d different elements, the K d Different elements all satisfy the formula θ(k,d)=2πiB / N d , i is a non-negative integer and less than N d / B is the difference between the rounded-down value and 1. B is a positive integer and a system configuration parameter.

23. The method according to claim 4, wherein The phase angle θ(k, d) of different transmitting nodes in the dth group of transmitting nodes is respectively an element in a phase angle set, and the phase angle set includes N d different elements, N d Different elements all satisfy the formula θ(k,d)=2πi / N d , i is less than N d A non-negative integer of -1, N d Greater than or equal to K d .

24. The method according to claim 1, wherein The dth group of transmitting nodes K d There are N transmitting nodes d The same M in the time domain symbols d The reference signal is transmitted on subcarriers, including: The K d Different transmitting nodes among the transmitting nodes transmit different reference signals on the same time domain symbol except the first time domain symbol.

25. 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.

26. The method according to claim 1, wherein The same transmitting node in the dth group of transmitting nodes is in N d The same M in the time domain symbols d The modulus values ​​of the reference signals transmitted on the subcarriers are the same.

27. The method according to claim 1, wherein The M of the same transmitting node in the dth group of transmitting nodes in the same time domain symbol d The phase differences of the reference signals on adjacent subcarriers among the reference signals transmitted on the subcarriers are the same.

28. The method according to claim 1, wherein The M of the same transmitting node in the dth group of transmitting nodes in the same time domain symbol d The reference signals transmitted on the subcarriers are the same.

29. The method of claim 1, further comprising: Other signals are transmitted on subcarriers other than the subcarriers occupied by the D group of transmitting nodes for transmitting reference signals.

30. The method according to claim 29, wherein There is a transmitting node in the dth group of transmitting nodes in the N d The other signal is transmitted on different frequency domain resources of time domain symbols.

31. The method according to claim 29, wherein The different transmitting nodes in the dth group of transmitting nodes are in the N d The other signal is transmitted on different frequency domain resources of time domain symbols.

32. The method of claim 29, wherein: The frequency domain resource bandwidth of each transmitting node in the dth group of transmitting nodes for transmitting the other signal is smaller than the M d The frequency domain spacing between the first and last subcarriers in a subcarrier.

33. The method of claim 29, wherein: The power of the reference signal is greater than or equal to the power of the other signals.

34. The method of claim 1, wherein The K of the d-th group of transmitting nodes d There are N transmitting nodes d The same M in the time domain symbols d Other signals except the reference signal are transmitted on subcarriers, and a phase angle of the other signals is different from a phase angle of each transmitting node in the dth group.

35. A communication device comprising: memory and processor; The memory is coupled to the processor; The memory is used to store instructions executable by the processor; When the processor executes the instructions, the method according to any one of claims 1 to 34 is performed.

36. 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 34.

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