Data transmission method and apparatus, terminal, network device, and storage medium

Abstract

In embodiments provided by the present disclosure, a data modulation symbol and a demodulation reference signal (DMRS) are sent on the basis of physical resource positions of the data modulation symbol and of the DMRS on a physical resource, wherein the physical resource position of the data modulation symbol on the physical resource is determined by means of the following steps: mapping the data modulation symbol to the physical resource, and dividing the mapped data modulation symbol into one or more groups, each group comprising at least one data modulation symbol; and for any group, determining the physical resource position of the data modulation symbol in the group on the basis of a reference resource position of the group, the reference resource position having an association relationship with the physical resource position of the DMRS.

Description

Data transmission method, device, terminal, network equipment and storage medium

[0001] This disclosure claims priority to Chinese patent application number 2023114466330, filed on November 1, 2023, entitled “Data transmission method, apparatus, terminal, network device and storage medium,” which is hereby incorporated by reference in its entirety. Technical Field

[0002] The present disclosure relates to the field of communication technologies, and in particular to a data transmission method, apparatus, terminal, network equipment, storage medium, and computer program product. Background Art

[0003] With the development and evolution of mobile communications, multiple international organizations are researching new wireless communication systems. The growth in the number of connected devices is a key driver of these new wireless communication systems. However, limited network data transmission resources make it difficult to accommodate the initial access and data transmission of a massive number of terminals using conventional contention-based access technologies. Uncoordinated random access and transmission technologies, however, require minimal or no coordination between the network and terminals, enabling them to support massive numbers of terminals.

[0004] In uncoordinated random access and transmission technologies, to achieve diversity gain, the terminal's data modulation symbols may be distributed across the physical resources configured throughout the network. To demodulate these data modulation symbols, DMRS (Demodulation Reference Signal) must be evenly inserted across the physical resources. However, when the data modulation symbols are sparse, the sparse data modulation symbols and evenly distributed DMRS result in very high DMRS overhead. Therefore, how to correctly transmit data modulation symbols with low DMRS overhead is a technical challenge that needs to be solved.

[0005] Summary of the Invention

[0006] According to various embodiments of the present disclosure, a data transmission method, apparatus, terminal, network device, storage medium, and computer program product are provided.

[0007] In a first aspect, the present disclosure provides a data transmission method, applied to a terminal, the method comprising:

[0008] Sending data modulation symbols and demodulation reference signals (DMRS) according to physical resource locations of the data modulation symbols and the DMRS on the physical resources;

[0009] The physical resource position of the data modulation symbol on the physical resource is determined by the following steps:

[0010] Mapping data modulation symbols onto physical resources, and dividing the mapped data modulation symbols into one or more groups, each group including at least one data modulation symbol;

[0011] For any group, the physical resource position of the data modulation symbol in the group is determined according to the reference resource position of the group, and the reference resource position is associated with the physical resource position of the DMRS.

[0012] In one embodiment, the association relationship between the reference resource location and the physical resource location of the DMRS includes at least one of the following: the reference resource location is consistent with the physical resource location of the DMRS; or

[0013] The interval between the physical resource position of the DMRS and the reference resource position is smaller than the preset interval.

[0014] In one embodiment, the reference resource location includes at least one of the following: a physical resource location of a target data modulation symbol in the group, or a physical resource location of a DMRS corresponding to the group; wherein the target data modulation symbol includes a pre-specified data modulation symbol in the group.

[0015] In one of the embodiments, the interval between the physical resource position of the data modulation symbol in the group and the reference resource position of the group is smaller than a preset interval, and the preset interval includes a first frequency domain interval and / or a first time domain interval.

[0016] In one embodiment, dividing the mapped data modulation symbols into one or more groups includes: skipping the data modulation symbols at a first target resource position and grouping the data modulation symbols; wherein the first target resource position is determined by:

[0017] The first target resource position is determined according to the physical resource position used to send the pilot signal; or the first target resource position is determined according to the second frequency domain interval, the second time domain interval and the physical resource position used to send the pilot signal.

[0018] In one embodiment, the method further comprises:

[0019] According to the reference resource position and preset interval of the group, the reserved physical resource position of the DMRS in the group is determined; and the DMRS is inserted into the reserved physical resource position in the group.

[0020] In one embodiment, the method further comprises:

[0021] Map the DMRS to the physical resources; use the physical resource position of the DMRS as the reference resource position of the group corresponding to the DMRS.

[0022] In one embodiment, the method further comprises:

[0023] For any group, the physical resource position of the data modulation symbol at the reference resource position in the fixed group remains unchanged, and the other data modulation symbols in the group are moved to the physical resource position of the data modulation symbol; or, the physical resource position of the DMRS at the reference resource position in the fixed group remains unchanged, and the other data modulation symbols in the group are moved to the physical resource position of the data modulation symbol.

[0024] In a second aspect, the present disclosure provides a data transmission method, applied to a network device, the method comprising:

[0025] Receive data modulation symbols and demodulation reference signals (DMRS) sent by the terminal;

[0026] Determining a data modulation symbol in the group according to a reference resource position of the group, wherein a physical resource position of a DMRS corresponding to the group is associated with the reference resource position;

[0027] According to the DMRS corresponding to the group, channel estimation is performed on the data modulation symbols in the group to obtain a DMRS channel estimation result.

[0028] In one embodiment, the association relationship between the physical resource location of the DMRS and the reference resource location includes at least one of the following: the reference resource location is consistent with the physical resource location of the DMRS; or

[0029] The interval between the physical resource position of the DMRS and the reference resource position is smaller than the preset interval.

[0030] In one embodiment, the reference resource location includes at least one of the following: a physical resource location of a target data modulation symbol in the group, or a physical resource location of a DMRS corresponding to the group; wherein the target data modulation symbol includes a pre-specified data modulation symbol in the group.

[0031] In one of the embodiments, the interval between the physical resource position of the data modulation symbol in the group and the reference resource position of the group is smaller than a preset interval, and the preset interval includes a first frequency domain interval and / or a first time domain interval.

[0032] In a third aspect, the present disclosure provides a data transmission device, the device comprising:

[0033] A sending unit, configured to send data modulation symbols and a demodulation reference signal DMRS according to physical resource positions of the data modulation symbols and the demodulation reference signal DMRS on the physical resources;

[0034] Among them, the physical resource position of the data modulation symbol on the physical resource is determined by a processing unit, and the processing unit is used to: map the data modulation symbol to the physical resource, divide the mapped data modulation symbol into one or more groups, and the group includes at least one data modulation symbol; for any group, determine the physical resource position of the data modulation symbol in the group according to the reference resource position of the group, and the reference resource position is associated with the physical resource position of the DMRS.

[0035] In one embodiment, the association between the reference resource location and the physical resource location of the DMRS includes at least one of the following:

[0036] The reference resource location is consistent with the physical resource location of the DMRS; or,

[0037] The interval between the physical resource position of the DMRS and the reference resource position is smaller than the preset interval.

[0038] In one embodiment, the reference resource location includes at least one of the following:

[0039] The physical resource location of the target data modulation symbol in the group, or the physical resource location of the DMRS corresponding to the group; wherein the target data modulation symbol includes a pre-specified data modulation symbol in the group.

[0040] In one of the embodiments, the interval between the physical resource position of the data modulation symbol in the group and the reference resource position of the group is smaller than a preset interval, and the preset interval includes a first frequency domain interval and / or a first time domain interval.

[0041] In one embodiment, the processing unit is specifically configured to:

[0042] The data modulation symbols located at a first target resource position are skipped and the data modulation symbols are grouped; wherein the first target resource position is determined by:

[0043] The first target resource position is determined according to the physical resource position used to send the pilot signal; or the first target resource position is determined according to the second frequency domain interval, the second time domain interval and the physical resource position used to send the pilot signal.

[0044] In one embodiment, the apparatus further comprises:

[0045] A first determining unit, configured to determine a reserved physical resource position of a DMRS in a group according to a reference resource position and a preset interval of the group;

[0046] The inserting unit is configured to insert the DMRS into the reserved physical resource position in the group.

[0047] In one embodiment, the apparatus further comprises:

[0048] A mapping unit, configured to map DMRS to physical resources;

[0049] The second determining unit is configured to use the physical resource position of the DMRS as a reference resource position of the group corresponding to the DMRS.

[0050] In one embodiment, the apparatus further comprises:

[0051] A mobile unit is used to, for any group, keep the physical resource position of the data modulation symbol at the reference resource position in the fixed group unchanged, and move other data modulation symbols in the group to the physical resource position of the data modulation symbol; or, keep the physical resource position of the DMRS at the reference resource position in the fixed group unchanged, and move other data modulation symbols in the group to the physical resource position of the data modulation symbol.

[0052] In a fourth aspect, the present disclosure provides a data transmission device, the device comprising:

[0053] A receiving unit, configured to receive data modulation symbols and a demodulation reference signal DMRS sent by a terminal;

[0054] a determining unit, configured to determine a data modulation symbol in a group according to a reference resource position of the group, wherein a physical resource position of a DMRS corresponding to the group is associated with the reference resource position;

[0055] The processing unit is configured to perform channel estimation on the data modulation symbols in the group according to the DMRS corresponding to the group, and obtain a DMRS channel estimation result.

[0056] In one embodiment, the association between the physical resource location of the DMRS and the reference resource location includes at least one of the following:

[0057] The reference resource position is consistent with the physical resource position of the DMRS; or, the interval between the physical resource position of the DMRS and the reference resource position is smaller than a preset interval.

[0058] In one embodiment, the reference resource location includes at least one of the following:

[0059] The physical resource location of the target data modulation symbol in the group, or the physical resource location of the DMRS corresponding to the group; wherein the target data modulation symbol includes a pre-specified data modulation symbol in the group.

[0060] In one of the embodiments, the interval between the physical resource position of the data modulation symbol in the group and the reference resource position of the group is smaller than a preset interval, and the preset interval includes a first frequency domain interval and / or a first time domain interval.

[0061] In a fifth aspect, the present disclosure provides a terminal, comprising: a memory, a transceiver, and a processor:

[0062] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of a processor; and a processor for reading the computer program in the memory and performing the following operations:

[0063] Sending data modulation symbols and demodulation reference signals (DMRS) according to physical resource locations of the data modulation symbols and the DMRS on the physical resources;

[0064] The physical resource position of the data modulation symbol on the physical resource is determined by the following steps:

[0065] Mapping the data modulation symbols onto physical resources, and dividing the mapped data modulation symbols into one or more groups, each group including at least one data modulation symbol;

[0066] For any group, the physical resource position of the data modulation symbol in the group is determined according to the reference resource position of the group, and the reference resource position is associated with the physical resource position of the DMRS.

[0067] In one embodiment, the association between the reference resource location and the physical resource location of the DMRS includes at least one of the following:

[0068] The reference resource position is consistent with the physical resource position of the DMRS; or, the interval between the physical resource position of the DMRS and the reference resource position is smaller than a preset interval.

[0069] In one embodiment, the reference resource location includes at least one of the following:

[0070] The physical resource location of the target data modulation symbol in the group, or the physical resource location of the DMRS corresponding to the group; wherein the target data modulation symbol includes a pre-specified data modulation symbol in the group.

[0071] In one of the embodiments, the interval between the physical resource position of the data modulation symbol in the group and the reference resource position of the group is smaller than a preset interval, and the preset interval includes a first frequency domain interval and / or a first time domain interval.

[0072] In one embodiment, the processor is further configured to perform the following operations:

[0073] The data modulation symbols located at a first target resource position are skipped and the data modulation symbols are grouped; wherein the first target resource position is determined by:

[0074] The first target resource position is determined according to the physical resource position used to send the pilot signal; or the first target resource position is determined according to the second frequency domain interval, the second time domain interval and the physical resource position used to send the pilot signal.

[0075] In one embodiment, the processor is further configured to perform the following operations:

[0076] Determining a reserved physical resource position of the DMRS in the group according to the reference resource position and the preset interval of the group;

[0077] The DMRS is inserted into the reserved physical resource position in the group.

[0078] In one embodiment, the processor is further configured to perform the following operations:

[0079] Mapping the DMRS to the physical resources;

[0080] The physical resource position of the DMRS is used as the reference resource position of the group corresponding to the DMRS.

[0081] In one embodiment, the processor is further configured to perform the following operations:

[0082] For any group, the physical resource position of the data modulation symbol at the reference resource position in the fixed group remains unchanged, and other data modulation symbols in the group are moved to the physical resource position of the data modulation symbol; or,

[0083] The physical resource position of the DMRS at the reference resource position in the fixed group remains unchanged, and other data modulation symbols in the group are moved to the physical resource position of the data modulation symbol.

[0084] In a sixth aspect, the present disclosure provides a network device, the network device comprising: a memory, a transceiver, and a processor:

[0085] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of a processor; and a processor for reading the computer program in the memory and performing the following operations:

[0086] Receive data modulation symbols and demodulation reference signals (DMRS) sent by the terminal;

[0087] Determining a data modulation symbol in the group according to a reference resource position of the group, wherein a physical resource position of a DMRS corresponding to the group is associated with the reference resource position;

[0088] According to the DMRS corresponding to the group, channel estimation is performed on the data modulation symbols in the group to obtain a DMRS channel estimation result.

[0089] In one embodiment, the association between the physical resource location of the DMRS and the reference resource location includes at least one of the following:

[0090] The reference resource position is consistent with the physical resource position of the DMRS; or, the interval between the physical resource position of the DMRS and the reference resource position is smaller than a preset interval.

[0091] In one embodiment, the reference resource location includes at least one of the following:

[0092] The physical resource location of the target data modulation symbol in the group, or the physical resource location of the DMRS corresponding to the group; wherein the target data modulation symbol includes a pre-specified data modulation symbol in the group.

[0093] In one of the embodiments, the interval between the physical resource position of the data modulation symbol in the group and the reference resource position of the group is smaller than a preset interval, and the preset interval includes a first frequency domain interval and / or a first time domain interval.

[0094] In a seventh aspect, the present disclosure further provides a processor-readable storage medium, which stores a program for causing a processor to execute any of the aforementioned data transmission methods.

[0095] In an eighth aspect, the present disclosure further provides a computer program product, comprising a computer program, which implements any of the aforementioned data transmission methods when executed by a processor.

[0096] The details of one or more embodiments of the present disclosure are set forth in the accompanying drawings and description. Other features, objects, and advantages of the present disclosure will become apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0097] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0098] FIG1 is a schematic block diagram of a URAT according to some embodiments;

[0099] FIG2 is a schematic diagram of a single repetition sending scheme in URAT according to some embodiments;

[0100] FIG3 is a schematic diagram of a DMRS design method for a Single repetition scheme in URAT according to some embodiments;

[0101] FIG4 a is a schematic diagram illustrating multiplexing and configuration of DMRS types according to some embodiments;

[0102] FIG4 b is a schematic diagram of multiplexing and configuration of DMRS types according to some other embodiments;

[0103] FIG5 is a schematic flow chart of a data transmission method according to some embodiments;

[0104] FIG6a is a schematic diagram of data modulation symbol mapping according to some embodiments;

[0105] FIG6 b is a schematic diagram illustrating shifting of data modulation symbol groups according to some embodiments;

[0106] FIG6 c is a schematic diagram of DMRS insertion according to some embodiments;

[0107] FIG6 d is a schematic diagram illustrating another data modulation symbol group shifting according to some embodiments;

[0108] FIG7 a is a schematic diagram of DMRS mapping according to some embodiments;

[0109] FIG7 b is a schematic diagram of data modulation symbol mapping according to some embodiments;

[0110] FIG7c is a schematic diagram illustrating data modulation symbol group shifting according to some embodiments;

[0111] FIG7 d is a schematic diagram illustrating another data modulation symbol group shift according to some embodiments;

[0112] FIG8 is a schematic flow chart of a data transmission method according to some embodiments;

[0113] FIG9 is a structural block diagram of a data transmission device according to some embodiments;

[0114] FIG10 is a structural block diagram of a data transmission device according to some other embodiments;

[0115] FIG11 is a diagram illustrating an internal structure of a network device according to some embodiments;

[0116] FIG12 is a diagram illustrating an internal structure of a terminal according to some embodiments. DETAILED DESCRIPTION

[0117] In the embodiments of the present invention, the term "and / or" describes the relationship between associated objects, indicating that three possible relationships exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship. In the embodiments of the present disclosure, the term "plurality" refers to two or more, and other quantifiers are similar.

[0118] 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 and 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 any creative efforts shall fall within the scope of protection of the present disclosure.

[0119] URAT (Uncoordinated Random Access and NOMA Transmission) is characterized by the simultaneous implementation of random access and non-orthogonal multiple access transmission without the need for network coordination. The absence of the need for network coordination means that the network does not need to confirm the access identity of the terminal or schedule transmission resources.

[0120] The principle block diagram of URAT is shown in Figure 1 , where meta bits are generated from bits to be transmitted, such as A bits of the bits to be transmitted, such as cyclic redundancy check bits of the bits to be transmitted. The terminal simultaneously transmits a preamble sequence and a data sequence and waits for an acknowledgment from the base station, indicating that the network has correctly received the information bits.

[0121] The specific meanings of uncoordinated random access and transmission technology include:

[0122] (1) Uncoordinated: The terminal does not require UE-specific network coordination signaling throughout the entire process from random access to multiple access transmission. It only requires the broadcasted basic cell configuration information. Based on the broadcasted basic cell configuration information, all terminals will use the same transmission scheme. The only difference between terminals may be the data bits to be transmitted. To improve the reliability of air interface transmission, the network needs to provide feedback confirmation information of the air interface transmission to the terminal. This can use an endogenous terminal identifier to enable the terminal to detect the confirmation information sent by the network.

[0123] (2) Non-orthogonal: All terminals share the physical resources indicated by the basic configuration information of the cell, and implement non-orthogonal multiple access transmission in the coding domain, spatial domain, etc. Non-orthogonal multiple access in the coding domain is achieved through coding with a finite block length. Under the framework of compressed sensing large address access, the distance between codewords of different terminals can be further increased. In addition to using different interleavers for the coding bits, different scrambling codes can be used for the coding bits, unequal diversity repetition can be used for the coding blocks, and joint interleaving with blank bits in the entire time-frequency domain can be used. Among them, unequal diversity is the design concept first introduced by PDMA, and blank bits are placeholder bits that are not transmitted. The interleaver, scrambling code, diversity degree, joint interleaver, etc. used by the terminal can be determined and indicated by CRC (Cyclic Redundancy Check).

[0124] (3) Converged multiple access: The entire process from random access to multiple access transmission uses the URAT air interface technology. The terminal sends a preamble signal, which, in addition to carrying meta-bits, is mainly intended to indicate to the network the presence of multi-user coded signals being transmitted simultaneously, thereby improving the detection performance of multi-user coded signals. Therefore, the preamble signal plays the role of random access. Interactive signaling such as authentication, security encryption, etc. between the terminal and the network can be transmitted as data to be transmitted through the URAT air interface technology, eliminating the need for explicit authentication, security encryption, and other sub-processes. The network provides feedback confirmation for the terminal's URAT transmission, and based on the received feedback information, the terminal decides whether to retransmit.

[0125] Figure 2 shows an example of a single repetition transmission scheme in URAT. Figure 2 contains N data modulation symbols C and M blank symbols X, occupying all N+M physical resources. In addition, one or more OFDM symbols are used to transmit DMRS. The transmission process includes:

[0126] Terminals receive broadcast configuration information from the base station, obtain information about data transmission resources and DMRS resources, and obtain basic information such as data coding and modulation. All terminals follow the same processing flow, encoding and modulating the information to be transmitted to generate data modulation symbols. Traditionally, this involves multiple repetitions, while a single repetition only performs a single repetition. Assuming the number of transmitted data modulation symbols is N, these N data modulation symbols can be represented as C01, C02, …, Cxk, Cx(k+1), …, CxN. The data modulation symbol C is concatenated with M blank symbols X, where the number of X is M, and represented as X01, X02, …, Xxm, Xx(m+1), …, XxM. An interleaving pattern is determined based on the meta-bits, i.e., based on a pre-agreed mapping table between meta-bits and interleaving patterns. Based on the selected interleaving pattern, the total transmitted symbols, including the C and X symbols, are interleaved. According to the pre-agreed resource mapping method, after resource mapping of the total transmission symbols from front to back, DMRS is inserted into the physical resources, and the preamble signal corresponding to the meta bit and the data modulation symbol and DMRS after resource mapping are sent out. No signal is sent on the resource unit corresponding to the blank symbol X.

[0127] The current NR (New Radio) DMRS scheme uniformly inserts pilots on the BWP (Bandwidth Part). Since the data transmitted in the single repetition transmission scheme is relatively sparse, the uniform pilot insertion scheme causes a large number of pilots to be inserted in locations where there is no data and no channel estimation is required, resulting in a waste of pilot overhead. In other words, the uniform pilot insertion scheme may be less efficient for single repetition.

[0128] The preamble transmission scheme sends the preamble on a subband within the BWP. The receiver uses correlation detection to detect the transmitted preamble. Since both the originally transmitted preamble and the actually received preamble are known, this information can be used to perform channel estimation on this subband. This eliminates the need for inserting additional pilots in this subband, reducing the pilot resources required for each user and minimizing user-pilot collisions, enabling support for more users.

[0129] The DMRS design method of the single repetition solution is shown in FIG3 . It adopts a design method of non-uniform DMRS density, and also has the problem of DMRS overhead waste.

[0130] The DMRS for the data channel in NR adopts a pre-positioned design concept. Within each scheduling time unit, the first appearance of DMRS should be as close as possible to the starting point of the scheduling. NR's DMRS ports are multiplexed using frequency-division multiplexing (FDM) and code division multiplexing (CDM). Within each CDM group, orthogonal cover codes (OCC) are used to divide the ports into multiple ports, and CDM groups are distinguished by FDM.

[0131] NR supports two DMRS types, and the DM-RS type used is configured through high-layer signaling. DMRS can include one (single-symbol DMRS) or two (dual-symbol DMRS) OFDM symbols. The multiplexing and configuration methods of the two DMRS types are described as follows:

[0132] In one DMRS type, as shown in Figure 4a, for single-symbol DMRS, the subcarriers within an OFDM symbol are divided into two groups of frequency-divided comb resources, where each group of comb resources constitutes a CDM group. Two OCCs are used within the CDM group to support two-port multiplexing, supporting up to four ports. Dual-symbol DMRS adds time-domain OCCs to the single-symbol structure. Each group of comb resources occupies two consecutive OFDM symbols, and each CDM group implements four orthogonal ports through four time-frequency domain OCCs, thus supporting up to eight orthogonal ports.

[0133] In another DMRS type, referring to Figure 4b, for single-symbol DMRS, the subcarriers within an OFDM symbol are divided into three CDM groups. Each CDM group consists of two pairs of adjacent subcarriers. Two OCCs are used within the CDM group to support two-port multiplexing, and FDM is used between groups, thus supporting a maximum of six ports. Dual-symbol DMRS adds time-domain OCCs to the single-symbol structure. Each CDM group occupies two consecutive OFDM symbols. Each CDM group supports four orthogonal ports through four time-frequency domain OCCs, and a maximum of 12 ports are supported across three CDM groups.

[0134] In addition, in high-speed mobility scenarios, in addition to the pre-DMRS, NR also stipulates that more DMRS symbols need to be inserted within the scheduling duration to ensure the estimation of time-varying channels. The NR system uses a structure that combines the pre-DMRS with additional DMRS with configurable time domain density. The pattern of each group of additional DMRS is a repetition of the pre-DMRS. Therefore, consistent with the pre-DMRS, each group of additional DMRS can occupy up to two consecutive OFDM symbols. Depending on the specific usage scenario and mobility, up to three groups of additional DMRS can be configured. The number of additional DMRS depends on the high-level parameter configuration and the specific scheduling duration.

[0135] The 6G-oriented URAT solution eliminates most coordination between terminals and the network, enabling support for scenarios with massive numbers of terminals. However, uncoordinated random access and transmission techniques lack network coordination, making it impossible to allocate completely orthogonal pilots to terminals. Terminals must autonomously select pilots to transmit.

[0136] Among the various DMRS configurations currently used in NR, the dual-symbol Type 2 DMRS only supports a maximum of 12 users. This poses a serious pilot collision problem when a large number of terminals independently select pilots, making it unsuitable for direct application in the URAT solution. Enhanced design is required to support a larger number of users. Although preambles can be used as pilots, the bandwidth they occupy is typically small and cannot be aligned with the bandwidth occupied by data. Therefore, preambles cannot provide the pilots required for data in other bandwidths. Furthermore, during single repetition transmission, evenly inserting DMRS in areas without frequency overlap with the preamble or in areas far from the preamble signal will result in significant pilot overhead.

[0137] Based on this, the embodiments of the present disclosure provide a single repetition data transmission scheme for the URAT scheme. By using flexible data and DMRS grouping designs for data transmission in areas that have no frequency domain overlap with the Preamble or in areas far away from the Preamble signal, lower pilot overhead and better channel estimation performance can be achieved.

[0138] The terminal device involved in the embodiments of the present disclosure may be a device that provides voice and / or data connectivity to a user, a handheld device with wireless connection function, or other processing device connected to a wireless modem. In different systems, the name of the terminal device may also be different. For example, in a 5G system, the terminal device may be called User Equipment (UE). A wireless terminal device may be a USB storage device, other personal computer memory devices, and a dongle. It may also communicate with one or more core networks (CN) via a radio access network (RAN). A wireless terminal device may be a mobile terminal device, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal device. For example, it may be a portable, pocket-sized, handheld, computer-built-in, or vehicle-mounted mobile device that exchanges language and / or data with a radio access network. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiated Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), personal computers, tablet computers, Machine-type Communication (MTC) terminal devices, etc. Wireless terminal devices may also be referred to as systems, subscriber units, subscriber stations, mobile stations, mobile stations, remote stations, access points, remote terminal devices, access terminal devices, user terminal devices, user agents, user devices, and wireless access points and routers / modems that meet the limitations of this definition, but are not limited in the embodiments of the present disclosure.

[0139] The network device involved in the embodiments of the present disclosure may be a base station, which may include multiple cells providing services to the terminal. Depending on the specific application scenario, the base station may also be called an access point, or may be a device in the access network that communicates with the wireless terminal device through one or more sectors on the air interface, or other names. The network device may be used to interchange received air frames with Internet Protocol (IP) packets, acting as a router between the wireless terminal device and the rest of the access network, wherein the rest of the access network may include an Internet Protocol (IP) communication network. The network device may also coordinate the attribute management of the air interface. For example, the network device involved in the embodiments of the present disclosure may be an evolutionary network device (eNB or e-NodeB) in a long term evolution (LTE) system, a 5G base station (gNB) in a next generation 5G network architecture, etc., or a home evolved Node B (HeNB), a relay node, a femto, a pico base station, a network test device, etc., which is not limited in the embodiments of the present disclosure. In some network structures, network devices may include centralized unit (CU) nodes and distributed unit (DU) nodes, and the centralized unit and the distributed unit may also be arranged geographically separately.

[0140] In an exemplary embodiment, a data transmission method is provided, which is described by taking the method applied to a terminal device as an example. Referring to FIG. 5 , the data transmission method may include steps 501 to 503, wherein:

[0141] Step 503: Send the data modulation symbols and the demodulation reference signal DMRS according to their physical resource locations on the physical resources.

[0142] The physical resource location of the data modulation symbol on the physical resource can be determined through steps 501 and 502:

[0143] Step 501: Map data modulation symbols onto physical resources, and divide the mapped data modulation symbols into one or more groups, each group including at least one data modulation symbol;

[0144] Step 502: for any group, determine the physical resource position of the data modulation symbol in the group according to the reference resource position of the group, where the reference resource position is associated with the physical resource position of the DMRS.

[0145] In the embodiment of the present disclosure, before performing data transmission, the terminal may perform QPSK (Quadrature Phase Shift Keying, orthogonal phase shift keying) / 16QAM / 64QAM / 256QAM / 1024QAM modulation on the transmission bits to obtain a data modulation symbol sequence composed of multiple data modulation symbols, where 16QAM is QAM (Quadrature Amplitude Modulation, orthogonal amplitude modulation) containing 16 symbols, 64QAM is QAM containing 64 symbols, 256QAM is QAM containing 256 symbols, and 1024QAM is QAM containing 1024 symbols.

[0146] In an embodiment of the present disclosure, the physical resource positions of some data modulation symbols on the physical resources can be adjusted so that the physical resource positions of multiple data modulation symbols can be in adjacent or similar positions, and corresponding DMRSs are mapped or inserted in adjacent or similar positions of the physical resource positions of the multiple data modulation symbols, so that the multiple data modulation symbols can all use the DMRS for channel estimation and demodulation, etc., thereby greatly reducing the overhead of DMRS.

[0147] Exemplarily, after obtaining the data modulation symbol sequence, each data modulation symbol in the data modulation symbol sequence may be mapped to a physical resource RE (Resource Element) according to a pre-selected or preset agreement or an interleaving method determined based on meta-bits.

[0148] In the disclosed embodiments, the mapped data modulation symbols (hereinafter referred to as data modulation symbols) may be sequentially divided into a plurality of groups according to an agreed grouping method, wherein each group may include at least one data modulation symbol. For example, excluding the data modulation symbols for channel estimation using a pilot signal, the remaining data modulation symbols may be grouped into a plurality of groups with a preset number of data modulation symbols. When the last remaining data modulation symbols are less than the preset number, the last remaining data modulation symbols are directly divided into one group.

[0149] For example, a reference resource position is set for a group. Taking a group as an example, the reference resource position of the group can be determined, and the physical resource position of each data modulation symbol in the group can be determined based on the reference resource position of the group.

[0150] In an exemplary embodiment, the reference resource location may include at least one of the following: the physical resource location of the target data modulation symbol in the group, or the physical resource location of the DMRS corresponding to the group; wherein the target data modulation symbol includes a pre-specified data modulation symbol in the group.

[0151] In the disclosed embodiments, the target data modulation symbol may include a pre-specified data modulation symbol in a group. For example, the first data modulation symbol or a data modulation symbol in the middle of a group may be used as the target data modulation symbol. The disclosed embodiments do not specifically limit the method for specifying the target data modulation symbol; the same method may be used for all groups. After determining the target data modulation symbol, the terminal may use the physical resource of the target data modulation symbol as the reference resource location.

[0152] Alternatively, a physical resource location of a DMRS corresponding to the group may be first determined, and the physical resource of the DMRS may be used as a reference resource location. The DMRS corresponding to the group is a DMRS used for channel estimation and demodulation of data modulation symbols in the group. When there is only one DMRS corresponding to the group, the physical resource location of the DMRS may be determined as the reference resource location. Alternatively, when there are multiple DMRSs corresponding to the group, a pre-specified physical resource location of a DMRS among the multiple DMRSs (e.g., the physical resource location of the first DMRS) may be determined, and the pre-specified physical resource location of the DMRS may be used as the reference resource location.

[0153] In the embodiment of the present disclosure, there is no specific limitation on the method for setting the reference resource location. All groups may use the same method for setting the reference resource location.

[0154] After determining the reference resource position of the group, the physical resource position of each data modulation symbol in the group can be determined based on the reference resource position of the group. In an exemplary embodiment, the interval between the physical resource position of the data modulation symbol in the group and the reference resource position of the group is less than a preset interval, and the preset interval includes a first frequency domain interval and / or a first time domain interval.

[0155] Among them, the first frequency domain interval and the first time domain interval can be pre-set intervals, for example: the first frequency domain interval can be T1 subcarrier intervals, and the first time domain interval can be T2 OFDM (Orthogonal Frequency Division Multiplexing, i.e., orthogonal frequency division multiplexing technology) symbol intervals, wherein the specific values ​​of T1 and T2 can be set by technical personnel in this field according to needs, for example: set according to dimensions such as the combination of accuracy requirements and the number of groups, for example: the higher the accuracy, the smaller the value, or the fewer the number of groups, the more data modulation symbols in the group, the value should be greater than the number of data modulation symbols in the group, and the larger the value.

[0156] Exemplarily, the available physical resource positions of the group can be determined based on the reference resource position and preset interval of the group, and a physical resource position can be allocated to each data modulation symbol from the available physical resource positions of the group, wherein the available physical resource positions of the group can define a physical resource area, and the data modulation symbols located in the physical resource area can all use the DMRS corresponding to the group for channel estimation, demodulation and other processing.

[0157] In one example, after determining the target data modulation symbol in a group, the resource position where the target data modulation symbol is located can be used as a reference resource position, and a physical resource position whose frequency domain interval from the reference resource position is less than a first frequency domain interval can be used as an available physical resource position for the group. Alternatively, a physical resource position whose time domain interval from the reference resource position is less than a first time domain interval can be used as an available physical resource position for the group. Furthermore, physical resource positions can be sequentially allocated to other data modulation symbols in the group except the target data modulation symbol from the available physical resource positions of the group, thus determining the physical resource position of each data adjustment symbol in the group.

[0158] In another example, the physical resource position of the DMRS corresponding to the group can be used as the reference resource position of the group, and the physical resource position with a frequency domain interval less than the first frequency domain interval from the reference resource position can be used as the available physical resource position for the group, or the physical resource position with a time domain interval less than the first time domain interval from the reference resource position can be used as the available physical resource position for the group. Furthermore, the physical resource position can be sequentially allocated to each data modulation symbol in the group from the available physical resource positions of the group, that is, the physical resource position of each data adjustment symbol in the group can be determined.

[0159] In one example, when determining the physical resource locations available to a group based on a reference resource location and a preset interval, a preset resource location determination method may be used. This resource location determination method may indicate the specific position of the reference resource location in the physical resource locations available to the group, for example, indicating that the reference resource location is centered among the physical resource locations available to the group, or indicating that the reference resource location is at the head or tail of the physical locations available to the group. Exemplarily, when indicating that the reference resource location is centered, the physical resource locations on both sides of the reference resource location (in the frequency domain or time domain) that are less than the preset interval away from the reference resource location may be used as the physical resource locations available to the group; or, when indicating that the reference resource location is at the head or tail, the physical resource locations behind or before the reference resource location (in the frequency domain or time domain) that are less than the preset interval away from the reference resource location may be used as the physical resource locations available to the group.

[0160] After determining the physical resource positions available for each group, the physical resource positions available for the group can be allocated to the data modulation symbols in the group in sequence. After the physical resource positions are allocated, the order of the data modulation symbols in the same group remains unchanged. After data transmission is performed using the allocated physical resource positions, on the network device side, the data modulation symbols in the same group can use the DMRS corresponding to the group for channel estimation and data demodulation.

[0161] In the embodiment of the present disclosure, for any group, the reference resource position of the group is associated with the physical resource position of the DMRS corresponding to the group, wherein the association between the reference resource position and the physical resource position of the DMRS includes at least one of the following:

[0162] The reference resource position is consistent with the physical resource position of the DMRS; or, the interval between the physical resource position of the DMRS and the reference resource position is smaller than a preset interval.

[0163] In an embodiment of the present disclosure, the physical resource position of the DMRS corresponding to the group can be used as the reference resource position of the group. In this case, the reference resource position of the group is consistent with the physical resource position of the DMRS corresponding to the group; or, the physical resource position of the target data modulation symbol in the group can be used as the reference resource position. In this case, the physical resource position of the DMRS corresponding to the group should be within the physical resource position available for the group, that is, the interval between the physical resource position of the DMRS corresponding to the group and the reference resource position of the group is less than the preset interval.

[0164] When the physical resource position of DMRS and the reference resource position of the group meet any of the above-mentioned association relationships, the data modulation symbols in the group can all use the DMRS for channel estimation and demodulation processing, thereby greatly reducing the DMRS overhead and improving the accuracy of channel estimation.

[0165] In the disclosed embodiments, after determining the physical resource locations of the data modulation symbols and DMRS on the physical resources, each data modulation symbol and each DMRS can be sent to the network device based on the physical resource locations of the data modulation symbols and DMRS. After receiving the data modulation symbols and DMRS sent by the terminal, the network device can use the DMRS corresponding to each group to perform operations such as channel estimation and data demodulation on the data modulation symbols in the group.

[0166] In the data transmission method provided by the embodiment of the present disclosure, the terminal can map data modulation symbols to physical resources and divide the mapped data modulation symbols into one or more groups. For any group, the physical resource position of the data modulation symbols in the group is determined based on the reference resource position of the group. The reference resource position is associated with the physical resource position of the DMRS, and the data modulation symbols and the DMRS are sent according to the physical resource positions of the data modulation symbols and the DMRS on the physical resources. By adopting the data transmission method provided by the embodiment of the present disclosure, the data modulation symbols can be grouped, and the physical resource position of the data modulation symbols and the physical resource position of the DMRS in the group can be determined based on the reference resource position of the group, so that multiple data modulation symbols in the same group can use the same DMRS for channel estimation and data demodulation, thereby effectively reducing the overhead of the DMRS. At the same time, since the physical resource positions of the DMRS and each data modulation symbol in the group are limited by the reference resource position, the accuracy of the channel estimation can also be improved.

[0167] In an exemplary embodiment, dividing the mapped data modulation symbols into one or more groups may be achieved by the following steps:

[0168] The data modulation symbols located at a first target resource position are skipped and the data modulation symbols are grouped; wherein the first target resource position is determined by:

[0169] The first target resource position is determined according to the physical resource position used to send the pilot signal; or the first target resource position is determined according to the second frequency domain interval, the second time domain interval and the physical resource position used to send the pilot signal.

[0170] Among them, the second frequency domain interval and the second time domain interval can be pre-set intervals, for example, the second frequency domain interval can be T3 subcarrier intervals, and the second time domain interval can be T4 OFDM (Orthogonal Frequency Division Multiplexing, i.e., orthogonal frequency division multiplexing technology) symbol intervals, wherein the specific values ​​of T3 and T4 can be set by technical personnel in this field according to requirements, for example: the higher the accuracy requirement, the smaller the value, or the lower the DMRS overhead requirement, the larger the value.

[0171] In the embodiments of the present disclosure, the physical resource location used to send the preamble signal can be directly determined as the first target resource location. Alternatively, the physical resource location used to send the preamble signal and a physical resource location located near the physical resource location for sending the preamble signal can be determined as the first target resource location. For example, the physical resource location used to send the preamble signal can be obtained, and a physical resource location whose interval from the physical resource location is less than the second frequency domain interval and / or less than the second time domain interval, as well as the physical resource location used to send the preamble signal, can be determined as the first target resource location.

[0172] Exemplarily, the physical resource locations used to send the preamble signal may constitute an area, with reference to area B in FIG6a . The edge of area B may be determined, and the edge of area B in FIG6a may include edge x, edge y, and edge z. Then, a physical resource location whose interval with the edge x of area B is less than the second frequency domain interval, a physical resource location whose interval with the edge y of area B is less than the second frequency domain interval, a physical resource location whose interval with the edge z of area B is less than the second time domain interval, and a physical resource location in area B may be determined as the first target resource location.

[0173] The data modulation symbols located within the first target resource position can use the preamble signal for channel estimation and data demodulation, and the data modulation symbols located outside the first target resource position can be grouped and the DMRS corresponding to the group can be used for channel estimation and data demodulation.

[0174] In one example, after determining the first target resource position, during the grouping operation on the data modulation symbols, the data modulation symbols located at the first target resource position can be skipped, that is, the data modulation symbols located at the first target resource position do not participate in the grouping.

[0175] In another example, after determining the first target resource position, during the grouping operation on the data modulation symbols, the data modulation symbols located at the first target resource position participate in the grouping. For example, assuming that the first target resource position includes position 1, after the data modulation symbols located at position 1 are grouped and the physical resource positions are re-determined, the physical resource positions of the data modulation symbols located after the data modulation symbol need to be determined as position 1, that is, the data modulation symbols at the first target resource position need to be padded.

[0176] It should be noted that when the physical resource locations available to the group overlap with the first target resource locations, the overlapping area can be used only as the first target resource location, the number of physical resource locations in the overlapping area can be determined, the first target resource location can be skipped, and the adjacent area of ​​the first target resource location can be used as the physical resource location available to the group, and the number of physical resource locations in the adjacent area is consistent with the number of physical resource locations in the overlapping area.

[0177] In an exemplary embodiment, the division of each data modulation symbol into multiple groups may be achieved by the following steps:

[0178] Starting from the start position of the data modulation symbol, a preset number of data modulation symbols are sequentially determined as a group until there are no data modulation symbols of an undetermined group.

[0179] In the disclosed embodiments, when grouping the data modulation symbols, a preset number of data modulation symbols may be sequentially grouped, starting from the starting position of the data modulation symbols, to obtain multiple groups. It should be noted that the data modulation symbols located at the first target resource position are skipped during the grouping process. The preset number may be a pre-set number or a number calculated based on a pre-set number of groups and the number of data modulation symbols. The disclosed embodiments do not specifically limit the method for determining the preset number.

[0180] In one example, a first target resource location can be determined based on the second frequency domain interval, the second time domain interval, and the resource location of the physical resource used to send the preamble signal, and the data modulation symbol located at the first target resource location is used as the first type of data modulation symbol, and the data modulation symbols other than the first type of data modulation symbol are used as the second type of data modulation symbol. Starting from the starting position of the second type of data modulation symbol, the second type of data modulation symbols are sequentially divided into a plurality of groups, with each group consisting of a preset number of data modulation symbols.

[0181] In another example, the first target resource position can be determined based on the second frequency domain interval, the second time domain interval, and the resource position of the physical resource used to send the preamble signal. Starting from the starting position of the data modulation symbol, a preset number of data modulation symbols are sequentially determined as data modulation symbols of the second type. If, among the preset number of data modulation symbols, there are i data modulation symbols located at the first target resource position, then the i data modulation symbols are used as the first data modulation symbols, and the consecutive i data modulation symbols located after the first data modulation symbol are used as the second data modulation symbols. The i second data modulation symbols are used as data modulation symbols of the first type. Starting from the position after the first type of data modulation symbol, the process jumps to the step of sequentially determining the preset number of data modulation symbols as data modulation symbols of the second type until there are no data modulation symbols of undetermined type, and the data modulation symbols of the second type are divided into multiple groups.

[0182] In an exemplary embodiment, the above method may further include:

[0183] For any group, the physical resource position of the data modulation symbol at the reference resource position in the fixed group remains unchanged, and the other data modulation symbols in the group are moved to the physical resource position of the data modulation symbol; or, the physical resource position of the DMRS at the reference resource position in the fixed group remains unchanged, and the other data modulation symbols in the group are moved to the physical resource position of the data modulation symbol.

[0184] In one example, after the mapping is completed, each data modulation symbol has an initial physical resource position on the physical resource. When the reference resource position is the physical resource position of the target data modulation symbol, the initial resource position (or physical resource position) of the target data modulation symbol in the group can be fixed unchanged, and other data modulation symbols are moved from the initial resource position to the re-determined physical resource position of each data modulation symbol. After the move, the data modulation symbols in the same group are all in the physical resource position available for the group, so the DMRS corresponding to the group can be used for channel estimation and demodulation, which can greatly reduce the overhead of DMRS and improve the accuracy of channel estimation.

[0185] In another example, after the mapping is completed, each data modulation symbol has an initial physical resource position on the physical resource. When the reference resource position is the physical resource position of the DMRS corresponding to the group, the physical resource position of the DMRS in the group can be fixed unchanged, and each data modulation symbol in the group is moved from the initial resource position to the re-determined physical resource position of each data modulation symbol. After the move, the data modulation symbols in the same group are all in the physical resource position available to the group, so the DMRS corresponding to the group can be used for channel estimation and demodulation, which can greatly reduce the overhead of the DMRS and improve the accuracy of channel estimation.

[0186] In an exemplary embodiment, the above method may further include:

[0187] According to the reference resource position and preset interval of the group, the reserved physical resource position of the DMRS in the group is determined; and the DMRS is inserted into the reserved physical resource position in the group.

[0188] In an embodiment of the present disclosure, when the reference resource position is the reference resource position in a group, the physical resource position available for the group can be determined based on the reference resource position and the preset interval of the group, and a reservation strategy can be used to determine the reserved physical resource position of the DMRS in the group from the physical resource positions available for the group.

[0189] The reservation policy may be pre-set. For example, the reservation policy may include using the central physical resource position in the group as the reserved physical resource position for the DMRS, or using the physical resource position at the head or tail of the group as the reserved physical resource position for the DMRS, etc. The specific number of reserved physical resource positions is consistent with the number of DMRSs to be inserted. In the embodiments of the present disclosure, there is no specific limitation on the reservation policy, and each group may adopt the same reservation policy.

[0190] The disclosed embodiments do not specifically limit the timing of DMRS insertion. For example, the data modulation symbols in the packet may be first moved to corresponding physical resource locations, and then the DMRS may be inserted into the reserved physical resource locations in the packet. Alternatively, the DMRS may be inserted into the reserved physical resource locations in the packet, and then the data modulation symbols in the packet may be moved to corresponding physical resource locations.

[0191] To help those skilled in the art better understand the above embodiment, the above embodiment is described below using a specific example. In this example, the terminal can perform mapping of data modulation symbols to physical resources REs, then adjust the data modulation symbols to a grouped aggregation state, and finally insert DMRS symbols into each group.

[0192] Exemplarily, after the terminal generates a Preamble signal (also referred to as a pilot signal), it can transmit the Preamble signal on a physical resource, and the physical resource used to transmit the Preamble signal is referred to as region B. Further, based on region B, the second frequency domain interval, and the second time domain interval, the first target resource position is determined, and the region formed by the first target resource position is referred to as region C. Region B is included within region C, as shown in FIG6a. In fact, the demodulation of the data modulation symbols within region C will mainly use the channel estimate obtained based on the Preamble. For region C, DMRS may not be inserted or only a very small amount of DMRS may be inserted, and the performance of the channel estimation can also be guaranteed, thereby reducing the overhead of DMRS and supporting more users.

[0193] The terminal uses a target interleaving dispersion method to map data modulation symbols to physical resources. For example, assuming a total of L data modulation symbols, after supplementing X blank symbols, an interleaver with an interleaving depth of M can be used to disperse the data modulation symbols to M physical resources configured by the network, where M = L + X + N, N is the number of physical resources occupied by DMRS (or may also include other overhead). In this example, N is taken as the number of physical resources occupied by DMRS as an example. A blank symbol means that no signal is transmitted on the physical resources it occupies. As shown in Figures 6a to 6c, L = 10, N = 3, X = 71, and M = 84.

[0194] The terminal can adjust the physical resource location of some data modulation symbols to make them into a group aggregation state. For example, starting from the starting position of the data modulation symbol, each P data modulation symbols are sequentially determined as a group. In the process of dividing the groups, the data modulation symbols located in area C are skipped. For example: as shown in Figure 6b, every two data modulation symbols are grouped. Starting from data modulation symbol 1, since data modulation symbol 2 is located in data area C, data modulation symbol 2 can be skipped, and data modulation symbol 1 and data modulation symbol 3 are determined as a group. Data modulation symbol 4 and data modulation symbol 6 are located in area C, so data modulation symbol 4 and data modulation symbol 6 can be skipped, and data modulation symbol 5 and data modulation symbol 7 are divided into a group. And so on, multiple groups can be obtained.

[0195] Assuming that the first data modulation symbol in each group is used as the target data modulation symbol, the available physical resource positions for each group can be determined based on the physical resource position of the first data modulation symbol in each group and the preset interval. Exemplarily, physical resource positions whose interval with the physical resource position of the first data modulation symbol is less than the preset interval can be used as the available physical resource positions for the group, and physical resource positions can be allocated to data modulation symbols in the group other than the first data modulation symbol from the available physical resource positions for the group. After the physical resource positions are allocated, the transmission order of the data modulation symbols in the group remains unchanged.

[0196] The physical resource position of the first data modulation symbol in each group is fixed unchanged, and the subsequent P-1 consecutive data modulation symbols in the group are moved to their respective physical resource positions. After the movement, the P-1 data modulation symbols will be located near the physical resource position of the first data modulation symbol (for example, as shown in Figure 6b, near means that the minimum interval with the edge subcarrier of the first data modulation symbol is less than T1 subcarrier intervals). At the same time, a corresponding physical resource position can be reserved for DMRS in the available physical resource position of the group (in Figure 6b, the reserved physical resource position of DMRS is located in the middle of the physical resource positions of the two data modulation symbols). Exemplarily, after the data modulation symbol is moved to the physical resource position, the physical resource position before the data modulation symbol is moved will be filled with blank symbols, and the data modulation symbols in area C remain unchanged.

[0197] It should be noted that the above-mentioned vicinity may include adjacent or close areas in the frequency domain or adjacent or close areas in the time domain. The so-called frequency domain proximity means that the interval between two physical resource positions is less than T1 subcarrier intervals, and the so-called time domain proximity means that the interval between two physical resource positions is less than T2 OFDM symbol intervals.

[0198] After completing operations such as group shifting, the terminal can insert DMRSs within each group, sequentially inserting the DMRSs in the DMRS sequence into the reserved physical resource locations for each DMRS in the group. For example, as shown in Figure 6c, in this example, the DMRSs include DMRSa, DMRSb, and DMRSc. DMRSa is inserted between data modulation symbols 1 and 3, DMRSb is inserted between data modulation symbols 5 and 7, and DMRSc is inserted between data modulation symbols 8 and 10. In region C, the reserved physical resource locations for DMRSs can also be determined and inserted into these locations to further improve channel estimation performance in that region. Typically, the DMRS density in region C is lower than that in non-region C.

[0199] Alternatively, in another example, data modulation symbols located in region C can also participate in grouping and movement. During grouping, if the current data modulation symbol is located in region C, the physical resource location of the subsequent data modulation symbols must be determined to be the physical resource location of the current data modulation symbol in region C, and the subsequent data modulation symbols are no longer grouped. In this way, after the data modulation symbol located in region C is moved to the physical resource location in the corresponding group, the subsequent data modulation symbols can be moved into region C to fill the position. As shown in Figure 6d, starting from data modulation symbol 1, data modulation symbol 1 and data modulation symbol 2 are divided into a group, data modulation symbol 2 is moved to the vicinity of data modulation symbol 1 (nearby means that the minimum interval with the edge subcarrier of data modulation symbol 1 is less than T1 subcarrier interval), and data modulation symbol 3 is further moved to the initial physical position of data modulation symbol 2 for filling; data modulation symbol 5 and data modulation symbol 6 are divided into a group, and data modulation symbol 6 is moved to the vicinity of data modulation symbol 5, and data modulation symbol 7 is further moved to the initial physical position of data modulation symbol 6 for filling; data modulation symbol 8 and data modulation symbol 9 are divided into a group, and data modulation symbol 9 is moved to the vicinity of data modulation symbol 8, and data modulation symbol 10 is further moved to the initial physical position of data modulation symbol 9 for filling.

[0200] After completing the grouping and shifting of the data modulation symbols and the insertion of the DMRS, the data modulation symbols and DMRS can be sent to the base station in sequence according to the current physical resource position of the data modulation symbols and DMRS, so that after receiving the data modulation symbols and DMRS, the base station can group the data modulation symbols and DMRS using the same grouping method as the terminal side, and use the DMRS corresponding to the group to perform channel estimation and demodulation on the data modulation symbols in the group.

[0201] In an exemplary embodiment, the above method may further include:

[0202] Map the DMRS to the physical resources; use the physical resource position of the DMRS as the reference resource position of the group corresponding to the DMRS.

[0203] For example, a DMRS can be obtained from meta bits, and the meta bits can be obtained based on the bits to be transmitted. For example, the meta bits are a preset number of bits among the bits to be transmitted, such as cyclic redundancy check bits of the bits to be transmitted. Exemplarily, a DMRS sequence corresponding to the meta bits can be determined based on a pre-set mapping relationship between the DMRS and the meta bits. The embodiments of this disclosure do not specifically limit the method for determining the DMRS sequence from the meta bits; any method that can determine the DMRS sequence from the meta bits is applicable to the embodiments of this disclosure.

[0204] After obtaining the DMRS sequence, an appropriate number of DMRSs in the DMRS sequence can be mapped to time-frequency domain resource locations using methods such as uniformly spaced uniform reservation or uniformly random reservation. During grouping of the data modulation symbols, the data modulation symbols located at the first target resource location can be skipped to obtain multiple groups. The specific grouping process is described in the aforementioned embodiment and will not be further described in detail in the present disclosure.

[0205] To help those skilled in the art better understand the above embodiments, the following describes the above embodiments using specific examples. In this example, a DMRS-centric packet transmission method is considered. First, the terminal maps data modulation symbols to physical resource REs, and then maps DMRS to physical resource REs (the disclosed embodiments do not specifically limit the order of performing DMRS-to-physical resource mapping and data modulation symbol-to-physical resource mapping). Finally, the data modulation symbols are adjusted around the DMRS to be near the DMRS, achieving a grouped state.

[0206] Exemplarily, after the terminal generates a Preamble signal, it can transmit the Preamble signal on a physical resource, and the physical resource used to transmit the Preamble signal is referred to as region B. Further based on the physical resource, the second frequency domain interval, and the second time domain interval, the first target resource position is determined, and the region formed by the first target resource position is referred to as region C. Region B is included in region C, as shown in Figure 7a. The demodulation of the data modulation symbols within region C will mainly use the channel estimation obtained based on the Preamble. For this region C, DMRS may not be inserted or only a very small amount of DMRS may be inserted, and the performance of the channel estimation can also be guaranteed, thereby reducing the overhead of DMRS and supporting more users.

[0207] Outside of region C, the terminal can reserve N physical resource locations for DMRS using either uniform reservation or uniform random reservation, where N is the number of time-frequency domain resources occupied by DMRS (and other overhead), and map the DMRS to the corresponding physical resource locations. As shown in Figure 7b, the reservation method is uniform random, where N = 3. In this example, the N DMRS physical resource locations are outside region C, meaning that the DMRS is not inserted in the first target resource location.

[0208] The terminal uses a target interleaving dispersion method to map data modulation symbols to physical resources. In the scenario where DMRS mapping is performed first, the terminal can supplement L data modulation symbols with X blank symbols and then use an interleaver with an interleaving depth of MN to disperse the data modulation symbols across MN time-frequency domain resources configured by the network, where M = L + X + N. As shown in Figures 7a to 7c, L = 10, N = 3, X = 71, and M = 84. Alternatively, in the scenario where data modulation symbol mapping is performed first, an interleaver with an interleaving depth of M is used.

[0209] The terminal can adjust the resource positions of some data modulation symbols near the physical resource position of the DMRS to achieve a group aggregation state. For example, starting from the starting position of the data modulation symbol, each P data modulation symbols are sequentially determined as a group. During the group division process, the data modulation symbols located in area C are skipped. For example, as shown in Figure 7c, every two data modulation symbols form a group. Starting from data modulation symbol 1, since data modulation symbol 2 is located in data area C, data modulation symbol 2 can be skipped, and data modulation symbol 1 and data modulation symbol 3 are determined as a group. Data modulation symbol 4 and data modulation symbol 6 are located in area C, so data modulation symbol 4 and data modulation symbol 6 can be skipped, and data modulation symbol 5 and data modulation symbol 7 are divided into a group. And so on, multiple groups can be obtained.

[0210] Multiple groups are sequentially mapped to multiple DMRSs one-to-one (in this example, each group is mapped to one DMRS). Based on the physical resource locations and preset intervals of the corresponding DMRSs in each group, the available physical resource locations for each group can be determined. Exemplarily, physical resource locations with an interval with respect to the physical resource locations of the DMRS that is less than the preset interval can be used as the available physical resource locations for the group. Physical resource locations can be allocated to each data modulation symbol in the group from the available physical resource locations for the group. After the physical resource locations are allocated, the transmission order of the data modulation symbols in the group does not change.

[0211] The time-frequency domain resource position of the DMRS in each group is fixed unchanged, and multiple data modulation symbols in each group are moved to their respective physical resource positions. After the movement, the multiple data modulation symbols are located near the DMRS time-frequency domain resource position (for example: the minimum interval with the edge subcarrier where the DMRS symbol is located is less than T3 subcarrier interval).

[0212] Exemplarily, as shown in FIG7c , in this example, DMRS includes DMRS a, DMRS b, and DMRS c, wherein DMRS a corresponds to group 1, which includes data modulation symbol 1 and data modulation symbol 3, DMRS b corresponds to group 2, which includes data modulation symbol 5 and data modulation symbol 7, and DMRS c corresponds to group 3, which includes data modulation symbol 8 and data modulation symbol 10. The physical resource positions of DMRS a, DMRS b, and DMRS c are fixed, and the resource positions of DMRS a, DMRS b, and DMRS c are set to be located in the middle of the physical resource positions available in each group. Then, after the data modulation symbol 1 and the data modulation symbol 3 in group 1 are moved to their respective physical resource positions, the data modulation symbol 1 and the data modulation symbol 3 will be on both sides of DMRS a. After the data modulation symbol 5 and the data modulation symbol 7 in group 2 are moved to their respective physical resource positions, the data modulation symbol 5 and the data modulation symbol 7 will be at the DMRS On both sides of DMRS b, after data modulation symbol 8 and data modulation symbol 10 in group 3 are moved to their respective physical resource positions, data modulation symbol 8 and data modulation symbol 10 will be on both sides of DMRS c.

[0213] Alternatively, in another example, data modulation symbols located in region C can also participate in grouping and movement. During grouping, if the current data modulation symbol is located in region C, the physical resource location of the subsequent data modulation symbols must be determined to be the physical resource location of the current data modulation symbol in region C, and the subsequent data modulation symbols are no longer grouped. In this way, after the data modulation symbol located in region C is moved to the physical resource location in the corresponding group, the subsequent data modulation symbols can be moved into region C to fill the position. As shown in Figure 7d, starting from data modulation symbol 1, data modulation symbol 1 and data modulation symbol 2 are divided into a group, data modulation symbol 2 is moved to the vicinity of DMRS a (nearby means that the minimum interval with the edge subcarrier of DMRS a is less than T1 subcarrier interval), and data modulation symbol 3 is further moved to the initial physical resource position of data modulation symbol 2 for filling; data modulation symbol 5 and data modulation symbol 6 are divided into a group, and data modulation symbol 6 is moved to the vicinity of DMRS b, and data modulation symbol 7 is further moved to the initial physical resource position of data modulation symbol 6 for filling; data modulation symbol 8 and data modulation symbol 9 are divided into a group, and data modulation symbol 9 is moved to the vicinity of DMRS c, and data modulation symbol 10 is further moved to the initial physical resource position of data modulation symbol 9 for filling.

[0214] After completing the grouping and shifting of the data modulation symbols, each data modulation symbol and DMRS can be sent to the base station in sequence according to the current physical resource position of the data modulation symbols and DMRS, so that after receiving the data modulation symbols and DMRS, the base station can group the data modulation symbols and DMRS using the same grouping method as the terminal side, and use the DMRS corresponding to the group to perform channel estimation and demodulation on the data modulation symbols in the group.

[0215] In an exemplary embodiment, as shown in FIG8 , a data transmission method is provided, which is described by taking the method applied to a network device as an example. The network device may include a base station or other device, and includes the following steps 801 to 803. In which:

[0216] Step 801: receiving data modulation symbols and demodulation reference signals (DMRS) sent by a terminal;

[0217] Step 802: determining a data modulation symbol in the group according to a reference resource position of the group, wherein the physical resource position of the DMRS corresponding to the group is associated with the reference resource position;

[0218] Step 803: Perform channel estimation on the data modulation symbols in the group according to the DMRS corresponding to the group to obtain a DMRS channel estimation result.

[0219] In the embodiment of the present disclosure, after grouping the data modulation symbols, the terminal can determine the reference resource location of each group based on a pre-set reference resource location setting method, and determine the physical resource location of each data modulation symbol in the group based on the reference resource location in the group, and each group has a corresponding DMRS. In this way, the data modulation symbols in the same group can use a unified DMRS for channel estimation and data demodulation, thereby reducing the DMRS overhead. The specific process can refer to the relevant description in the aforementioned embodiment, and this is not specifically limited in the embodiment of the present disclosure. After determining the physical resource location of the data modulation symbols and DMRS, the terminal can send each data modulation symbol and each DMRS to the network device based on the physical resource location of each data modulation symbol and each DMRS.

[0220] For example, the terminal can send a preamble signal to the base station. Since the preamble signal is generated based on the meta-bit, the meta-bit can be obtained based on the preamble signal. The terminal and the network device can use the meta-bit to determine the interleaving method used. After obtaining the meta-bit, the network device can determine the interleaving method used by the terminal based on the meta-bit. Then, according to the interleaving method, the data modulation symbol and DMRS received by the network device, and the pre-set setting method of the same reference resource position as that used by the terminal, the reference resource position corresponding to each group is determined. Then, based on the reference resource position and the preset interval, the physical resource position available for each group is determined respectively. The specific method for determining the reference resource position and the physical resource position available for the group can refer to the relevant description of the aforementioned embodiment, and is not specifically limited in the embodiments of the present disclosure.

[0221] After determining the physical resource positions available for each group, the data modulation symbols located in the resource positions available for each group may be divided into each group.

[0222] In an embodiment of the present disclosure, after determining the physical resource positions available for each group, the DMRS located in the physical resource positions available for each group can be used as the DMRS corresponding to each group, and the DMRS corresponding to each group can be used to perform channel estimation on the resource positions corresponding to each data modulation symbol in each group to obtain a DMRS channel estimation result.

[0223] In one example, the reference resource location includes at least one of the following: a physical resource location of a target data modulation symbol in the group, or a physical resource location of a DMRS corresponding to the group; wherein the target data modulation symbol includes a pre-specified data modulation symbol in the group.

[0224] In one example, the interval between the physical resource position of the data modulation symbol in the group and the reference resource position of the group is smaller than a preset interval, and the preset interval includes a first frequency domain interval and / or a first time domain interval.

[0225] Among them, the specific determination of the reference resource position and the process of determining the physical resource position available to the group based on the reference resource position and the preset interval, etc., can be referred to the relevant description of the above embodiment, and no specific limitation is made in the embodiments of the present disclosure.

[0226] In the embodiment of the present disclosure, the association relationship between the physical resource position of DMRS and the reference resource position includes at least one of the following: the reference resource position is consistent with the physical resource position of DMRS; or, the interval between the physical resource position of DMRS and the reference resource position is less than the preset interval.

[0227] In an embodiment of the present disclosure, after receiving a preamble signal, the network device can perform channel estimation on the physical resource location used to send the preamble signal based on the preamble signal to obtain a preamble channel estimation result, and combine the preamble channel estimation result and the DMRS channel estimation result to obtain the channel estimation results at all physical resource locations through an interpolation algorithm for subsequent demodulation operations of data modulation symbols.

[0228] According to the data transmission method provided by the embodiment of the present disclosure, after the network device receives the data modulation symbols and demodulation reference signal DMRS sent by the terminal, the data modulation symbols in the group can be determined according to the reference resource position of the group. The physical resource position of the DMRS corresponding to the group is associated with the reference resource position, and the data modulation symbols in the group can be channel estimated according to the DMRS corresponding to the group to obtain the DMRS channel estimation result. According to the data transmission method provided by the embodiment of the present disclosure, the data modulation symbols can be grouped, and the physical resource position of the data modulation symbols and the physical resource position of the DMRS in the group can be determined based on the reference resource position of the group, so that multiple data modulation symbols in the same group can use the same DMRS for channel estimation and data demodulation, thereby effectively reducing the DMRS overhead. At the same time, since the DMRS in the group and the physical resource position of each data modulation symbol are limited by the reference resource position, the accuracy of the channel estimation can also be improved.

[0229] In order to enable those skilled in the art to better understand the embodiments of the present disclosure, the embodiments of the present disclosure are described below with reference to specific examples.

[0230] In one example, when performing URAT transmission, a terminal first selects a preamble sequence based on the meta-bits to generate a preamble signal, completing the preamble signal transmission process. The preamble signal carries the meta-bits. Using a single repetition data modulation symbol interleaving and dispersion method, the terminal determines an interleaver based on the meta-bits. After processing the data modulation symbols using the interleaver, the data modulation symbols are dispersed across network-configured time-frequency domain resources. The interleaver is determined by the meta-bits, for example, using the meta-bits as the initialization seed for a generator register that generates a random ordering of the mobile nodes.

[0231] The terminal groups the data modulation symbols into groups of a preset number of symbols, obtaining multiple groups. The terminal determines the available physical resource locations for each group based on the physical resource locations of the target modulation symbols specified in the group and the preset interval. The terminal then determines the physical resource locations of each data modulation symbol in the group from the available physical resource locations for the group, adjusts some of the data modulation symbols in the group to their respective physical resource locations, and aggregates the groups. The terminal then determines the reserved physical resource locations for the DMRS within the available physical resource locations in the group, and sequentially inserts the DMRS into the reserved physical resource locations in each group. The DMRS sequence is determined by the meta bit, which serves as the UE ID in the DMRS sequence generation process.

[0232] The terminal sends the data modulation symbols and DMRS to the network device according to the physical resource positions of the data modulation symbols and DMRS, and does not send any signal at the physical resource positions occupied by blank symbols.

[0233] After receiving the preamble signal sent by the terminal, the network device performs sequence detection on the preamble signal to obtain the meta-bits, and performs channel estimation on the sequence detection result of the preamble signal (actually transmitted signal) and the received Preamble sequence (actually received signal) to obtain the preamble channel detection result. The network device determines the interleaver used by the terminal based on the detected meta-bits, and uses the interleaver and the same grouping method as the terminal to divide the data modulation symbols into multiple groups, and uses the DMRS corresponding to the group to perform channel estimation on the physical resource location of the data modulation symbols in the group to obtain the corresponding DMRS signal estimation result. The base station further combines the preamble channel estimation result and the DMRS channel estimation result, and obtains the channel response at all physical resource locations through an interpolation algorithm for subsequent data demodulation calculations, including: performing corresponding detection and decoding on the data modulation, and sending feedback information to the terminal when it determines that the URAT transmission is correctly received.

[0234] After the URAT transmission is completed, the terminal monitors the feedback information sent by the network device. When the feedback information sent by the network device indicates that the URAT reception is completed correctly, the terminal stops the URAT transmission. Otherwise, the terminal starts a new round of URAT transmission.

[0235] In another example, when performing URAT transmission, the terminal first selects a preamble sequence based on the meta bit, generates a preamble signal, and completes the transmission process of the preamble signal, wherein the preamble signal carries the meta bit. The terminal uses a method such as uniform reservation at equal intervals or uniform random reservation to map N DMRSs to N physical resource locations outside of area C (data modulation symbols within area C use the preamble signal for channel estimation, and the method for determining area C can refer to the relevant description of the aforementioned embodiment), wherein the DMRS sequence is determined by the meta bit, and the reserved N physical resource locations are determined by the meta bit. For example, a predefined mapping relationship between the DMRS sequence and the meta bit and a mapping relationship between the reserved physical resource locations and the meta bit can be used to determine the DMRS sequence and the reserved N physical resource locations.

[0236] The terminal uses a single repetition data modulation symbol interleaving and dispersion method, determining an interleaver based on meta-bits. After processing the data modulation symbols using the interleaver, the data modulation symbols are dispersed across physical resources configured by the network. The interleaver is determined by the meta-bits, for example, by using the meta-bits as the initialization seed for a generator register that generates a random ordering of mobile nodes. The terminal groups the data modulation symbols into groups of a preset number of units, generating multiple groups. After assigning each group to a DMRS, the terminal determines the available physical resource location for each group based on the physical resource location and preset interval of the DMRS corresponding to the group. The terminal then allocates a physical resource location from the available physical resource locations to each data modulation symbol in the group, and adjusts each data modulation symbol in the group to its corresponding physical resource location, thereby achieving a group-aggregated state.

[0237] The terminal sends the data modulation symbols and DMRS to the network device according to the physical resource positions of the data modulation symbols and DMRS, and does not send any signal at the physical resource positions occupied by blank symbols.

[0238] After receiving the preamble signal sent by the terminal, the network device performs sequence detection on the preamble signal to obtain meta bits, and performs channel estimation based on the sequence detection result of the preamble signal (actually transmitted signal) and the received Preamble sequence (actually received signal) to obtain the preamble channel detection result. The network device determines the interleaver used by the terminal based on the detected meta bits, and uses the interleaver and the same grouping method as the terminal to divide the data modulation symbols into multiple groups, and uses the DMRS corresponding to the group to perform channel estimation on the physical resource location of the data modulation symbols in the group to obtain the corresponding DMRS signal estimation result. The base station further combines the preamble channel estimation result and the DMRS channel estimation result, and obtains the channel response at all physical resource locations through an interpolation algorithm for subsequent data demodulation calculations, including: performing corresponding detection and decoding on the data modulation, and sending feedback information to the terminal when it determines that the URAT transmission is correctly received.

[0239] After the URAT transmission is completed, the terminal monitors the feedback information sent by the network device. When the feedback information sent by the base station indicates that the URAT reception is completed correctly, the terminal stops the URAT transmission. Otherwise, the terminal starts a new round of URAT transmission.

[0240] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0241] Based on the same inventive concept, the embodiments of the present disclosure further provide a data transmission device for implementing the aforementioned data transmission method. The implementation solution provided by this device is similar to the implementation solution described in the aforementioned method. Therefore, the specific limitations of one or more data transmission device embodiments provided below can be found in the above-mentioned limitations of the data transmission method and will not be further elaborated here.

[0242] In an exemplary embodiment, as shown in FIG9 , a data transmission device is provided, including: a sending unit 902 and a processing unit 904 , wherein:

[0243] The sending unit 902 is configured to send data modulation symbols and demodulation reference signals (DMRS) according to their physical resource positions on the physical resources.

[0244] The physical resource position of the data modulation symbol on the physical resource is determined by the processing unit 904, and the processing unit 904 is configured to:

[0245] Mapping the data modulation symbols onto physical resources, and dividing the mapped data modulation symbols into one or more groups, each group including at least one data modulation symbol;

[0246] For any group, the physical resource position of the data modulation symbol in the group is determined according to the reference resource position of the group, and the reference resource position is associated with the physical resource position of the DMRS.

[0247] In an example, the association relationship between the reference resource location and the physical resource location of the DMRS includes at least one of the following:

[0248] The reference resource position is consistent with the physical resource position of the DMRS; or, the interval between the physical resource position of the DMRS and the reference resource position is smaller than a preset interval.

[0249] In one example, the reference resource location includes at least one of the following: a physical resource location of a target data modulation symbol in the group, or a physical resource location of a DMRS corresponding to the group; wherein the target data modulation symbol includes a pre-specified data modulation symbol in the group.

[0250] In one example, the interval between the physical resource position of the data modulation symbol in the group and the reference resource position of the group is smaller than a preset interval, and the preset interval includes a first frequency domain interval and / or a first time domain interval.

[0251] In one example, the mapped data modulation symbols are divided into one or more groups, including:

[0252] Skipping data modulation symbols located at a first target resource position and grouping the data modulation symbols; wherein the first target resource position is determined by:

[0253] The first target resource position is determined according to the physical resource position used to send the pilot signal; or the first target resource position is determined according to the second frequency domain interval, the second time domain interval and the physical resource position used to send the pilot signal.

[0254] In one example, the apparatus further comprises:

[0255] A first determining unit, configured to determine a reserved physical resource position of a DMRS in a group according to a reference resource position and a preset interval of the group;

[0256] The inserting unit is configured to insert the DMRS into the reserved physical resource position in the group.

[0257] In one embodiment, the apparatus further comprises:

[0258] A mapping unit, configured to map DMRS to physical resources;

[0259] The second determining unit is configured to use the physical resource position of the DMRS as a reference resource position of the group corresponding to the DMRS.

[0260] In one embodiment, the apparatus further comprises:

[0261] A mobile unit is used to, for any group, keep the physical resource position of the data modulation symbol at the reference resource position in the fixed group unchanged, and move other data modulation symbols in the group to the physical resource position of the data modulation symbol; or, keep the physical resource position of the DMRS at the reference resource position in the fixed group unchanged, and move other data modulation symbols in the group to the physical resource position of the data modulation symbol.

[0262] In an exemplary embodiment, as shown in FIG10 , a data transmission device is provided, including: a receiving unit 1002 , a determining unit 1004 , and a processing unit 1006 , wherein:

[0263] The receiving unit 1002 is configured to receive data modulation symbols and a demodulation reference signal DMRS sent by the terminal;

[0264] A determining unit 1004 is configured to determine a data modulation symbol in a group according to a reference resource position of the group, wherein a physical resource position of a DMRS corresponding to the group is associated with the reference resource position;

[0265] The processing unit 1006 is configured to perform channel estimation on the data modulation symbols in the group according to the DMRS corresponding to the group, and obtain a DMRS channel estimation result.

[0266] In one example, the association relationship between the physical resource location of the DMRS and the reference resource location includes at least one of the following:

[0267] The reference resource position is consistent with the physical resource position of the DMRS; or, the interval between the physical resource position of the DMRS and the reference resource position is smaller than a preset interval.

[0268] In one example, the reference resource location includes at least one of the following:

[0269] The physical resource location of the target data modulation symbol in the group, or the physical resource location of the DMRS corresponding to the group; wherein the target data modulation symbol includes a pre-specified data modulation symbol in the group.

[0270] In one example, the interval between the physical resource position of the data modulation symbol in the group and the reference resource position of the group is smaller than a preset interval, and the preset interval includes a first frequency domain interval and / or a first time domain interval.

[0271] It should be noted that the division of units in the embodiments of the present disclosure is schematic and is merely a logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional units in the various embodiments of the present disclosure may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0272] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of the present disclosure, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the present disclosure.

[0273] It should be noted here that the above-mentioned device provided in the embodiment of the present disclosure can implement all the method steps implemented in the above-mentioned method embodiment and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those in the method embodiment will not be described in detail here.

[0274] In an exemplary embodiment, as shown in FIG11 , the present disclosure provides a network device, the network device including: a memory, a transceiver, and a processor:

[0275] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of a processor; and a processor for reading the computer program in the memory and performing the following operations:

[0276] Receive data modulation symbols and demodulation reference signals (DMRS) sent by the terminal;

[0277] Determining a data modulation symbol in the group according to a reference resource position of the group, wherein a physical resource position of a DMRS corresponding to the group is associated with the reference resource position;

[0278] According to the DMRS corresponding to the group, channel estimation is performed on the data modulation symbols in the group to obtain a DMRS channel estimation result.

[0279] In one embodiment, the association between the physical resource position of the DMRS and the reference resource position includes at least one of the following: the reference resource position is consistent with the physical resource position of the DMRS; or, the interval between the physical resource position of the DMRS and the reference resource position is less than the preset interval.

[0280] In one embodiment, the reference resource location includes at least one of the following: a physical resource location of a target data modulation symbol in the group, or a physical resource location of a DMRS corresponding to the group; wherein the target data modulation symbol includes a pre-specified data modulation symbol in the group.

[0281] In one of the embodiments, the interval between the physical resource position of the data modulation symbol in the group and the reference resource position of the group is smaller than a preset interval, and the preset interval includes a first frequency domain interval and / or a first time domain interval.

[0282] The transceiver is used to receive and transmit data under the control of processor x10. In Figure 11, the bus architecture can include any number of interconnected buses and bridges, specifically linking various circuits represented by one or more processors and memories. The bus architecture can also link various other circuits, such as peripherals, voltage regulators, and power management circuits. These are well known in the art and are therefore not described further herein. The bus interface provides an interface. The transceiver can be multiple components, including a transmitter and a receiver, providing a unit for communicating with various other devices over a transmission medium, such as a wireless channel, a wired channel, or an optical cable. The processor is responsible for managing the bus architecture and general processing, and the memory can store data used by processor x10 when performing operations.

[0283] The processor can be a central processing unit (CPU), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or a complex programmable logic device (CPLD), and the processor can also adopt a multi-core architecture.

[0284] It should be noted here that the above-mentioned device provided by the embodiment of the present invention can implement all the method steps implemented by the above-mentioned method embodiment and can achieve the same technical effect. The parts and beneficial effects that are the same as the method embodiment in this embodiment will not be described in detail here.

[0285] In an exemplary embodiment, as shown in FIG12 , the present disclosure provides a terminal, which includes: a memory, a transceiver, and a processor:

[0286] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of a processor; and a processor for reading the computer program in the memory and performing the following operations:

[0287] Sending data modulation symbols and demodulation reference signals (DMRS) according to physical resource locations of the data modulation symbols and the DMRS on the physical resources;

[0288] The physical resource position of the data modulation symbol on the physical resource is determined by the following steps:

[0289] Mapping the data modulation symbols onto physical resources, and dividing the mapped data modulation symbols into one or more groups, each group including at least one data modulation symbol;

[0290] For any group, the physical resource position of the data modulation symbol in the group is determined according to the reference resource position of the group, and the reference resource position is associated with the physical resource position of the DMRS.

[0291] In one embodiment, the association relationship between the reference resource position and the physical resource position of the DMRS includes at least one of the following: the reference resource position is consistent with the physical resource position of the DMRS; or, the interval between the physical resource position of the DMRS and the reference resource position is less than the preset interval.

[0292] In one embodiment, the reference resource location includes at least one of the following: a physical resource location of a target data modulation symbol in the group, or a physical resource location of a DMRS corresponding to the group; wherein the target data modulation symbol includes a pre-specified data modulation symbol in the group.

[0293] In one of the embodiments, the interval between the physical resource position of the data modulation symbol in the group and the reference resource position of the group is smaller than a preset interval, and the preset interval includes a first frequency domain interval and / or a first time domain interval.

[0294] In one embodiment, the mapped data modulation symbols are divided into one or more groups, including: skipping the data modulation symbols located at the first target resource position and grouping the data modulation symbols; wherein the first target resource position is determined by: determining the first target resource position according to the physical resource position used to send the pilot signal; or determining the first target resource position according to the second frequency domain interval, the second time domain interval and the physical resource position used to send the pilot signal.

[0295] In one embodiment, the method further includes: determining a reserved physical resource position of the DMRS in the group according to a reference resource position and a preset interval of the group; and inserting the DMRS into the reserved physical resource position in the group.

[0296] In one embodiment, the method further includes: mapping the DMRS to a physical resource; and using the physical resource position of the DMRS as a reference resource position of a group corresponding to the DMRS.

[0297] In one embodiment, the method further includes: for any group, the physical resource position of the data modulation symbol at the reference resource position in the fixed group remains unchanged, and the other data modulation symbols in the group are moved to the physical resource position of the data modulation symbol; or, the physical resource position of the DMRS at the reference resource position in the fixed group remains unchanged, and the other data modulation symbols in the group are moved to the physical resource position of the data modulation symbol.

[0298] Among them, the transceiver is used to receive and send data under the control of the processor. In Figure 12, the bus architecture can include any number of interconnected buses and bridges, specifically various circuits of one or more processors represented by the processor and the memory represented by the memory are linked together. The bus architecture can also link together various other circuits such as peripheral devices, voltage regulators and power management circuits, which are all well known in the art and therefore will not be further described in this article. The bus interface provides an interface. The transceiver can be multiple components, that is, including a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, and these transmission media include, these transmission media include wireless channels, wired channels, optical cables and other transmission media. For different user devices, the user interface can also be an interface that can connect externally or internally to required devices. The connected devices include but are not limited to keypads, displays, speakers, microphones, joysticks, etc.

[0299] The processor is responsible for managing the bus architecture and general processing, and the memory can store data used by the processor 1200 when performing operations.

[0300] Optionally, the processor may be a CPU (central processing unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array) or a CPLD (Complex Programmable Logic Device), and the processor may also adopt a multi-core architecture.

[0301] The processor calls the program stored in the memory to execute any of the methods provided by the embodiments of the present disclosure according to the obtained executable instructions. The processor and the memory can also be physically separated.

[0302] It should be noted here that the above-mentioned device provided by the embodiment of the present invention can implement all the method steps implemented by the above-mentioned method embodiment and can achieve the same technical effect. The parts and beneficial effects that are the same as the method embodiment in this embodiment will not be described in detail here.

[0303] The present disclosure further provides a processor-readable storage medium, wherein the processor-readable storage medium stores a program, wherein the program is configured to enable a processor to execute any of the aforementioned data transmission methods.

[0304] Among them, the processor-readable storage medium can be any available medium or data storage device that can be accessed by the processor, including but not limited to magnetic storage (such as floppy disks, hard disks, tapes, magneto-optical disks (MO)), optical storage (such as CDs, DVDs, BDs, HVDs, etc.), and semiconductor storage (such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drives (SSDs)), etc.

[0305] Those skilled in the art will appreciate that the embodiments of the present disclosure may be provided as methods, systems, or computer program products. Therefore, the present disclosure may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present disclosure may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage, etc.) containing computer-usable program code.

[0306] The present disclosure is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present disclosure. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer-executable instructions. These computer-executable instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0307] These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the processor-readable memory produce a product including an instruction device that implements the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0308] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this disclosure are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0309] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, database or other media used in the embodiments provided in the present disclosure may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory may include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this disclosure may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processor involved in each embodiment provided in this disclosure may be, but are not limited to, a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, and the like.

[0310] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0311] The above-described embodiments merely represent several implementation methods of the present disclosure. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present disclosure. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present disclosure, all of which fall within the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure shall be determined by the appended claims.

Claims

1. A data transmission method, characterized in that: Applied to a terminal, the method comprises: Sending the data modulation symbol and the demodulation reference signal DMRS according to the physical resource positions of the data modulation symbol and the DMRS on the physical resource; The physical resource position of the data modulation symbol on the physical resource is determined by the following steps: Mapping the data modulation symbols onto physical resources, and dividing the mapped data modulation symbols into one or more groups, each group including at least one data modulation symbol; For any of the groups, the physical resource position of the data modulation symbol in the group is determined according to the reference resource position of the group, and the reference resource position is associated with the physical resource position of the DMRS.

2. The method according to claim 1, characterized in that The association relationship between the reference resource position and the physical resource position of the DMRS includes at least one of the following: The reference resource position is consistent with the physical resource position of the DMRS; or, The interval between the physical resource position of the DMRS and the reference resource position is smaller than the preset interval.

3. The method according to claim 1 or 2, characterized in that: The reference resource location includes at least one of the following: The physical resource position of the target data modulation symbol in the group, or the physical resource position of the DMRS corresponding to the group; wherein the target data modulation symbol includes a pre-specified data modulation symbol in the group.

4. The method according to claim 1 or 2, characterized in that: The interval between the physical resource position of the data modulation symbol in the group and the reference resource position of the group is smaller than a preset interval, and the preset interval includes a first frequency domain interval and / or a first time domain interval.

5. The method according to claim 1, characterized in that The step of dividing the mapped data modulation symbols into one or more groups comprises: Skipping the data modulation symbols located at a first target resource position and grouping the data modulation symbols; wherein the first target resource position is determined in the following manner: determining the first target resource position according to a physical resource position used to send a pilot signal; or, The first target resource position is determined according to the second frequency domain interval, the second time domain interval, and the physical resource position used to send the preamble signal.

6. The method according to claim 2, characterized in that The method further comprises: Determining a reserved physical resource position of the DMRS in the group according to the reference resource position of the group and the preset interval; The DMRS is inserted into a reserved physical resource position in the group.

7. The method according to claim 2, characterized in that The method further comprises: Mapping the DMRS to the physical resource; The physical resource position of the DMRS is used as the reference resource position of the group corresponding to the DMRS.

8. The method according to claim 1, characterized in that: The method further comprises: For any group, the physical resource position of the data modulation symbol at the reference resource position in the group is fixed unchanged, and other data modulation symbols in the group are moved to the physical resource position of the data modulation symbol; or, The physical resource position of the DMRS at the reference resource position in the group is fixed unchanged, and other data modulation symbols in the group are moved to the physical resource position of the data modulation symbols.

9. A data transmission method, characterized in that: Applied to a network device, the method comprises: The data modulation symbol and demodulation reference signal DMRS sent by the receiving terminal; Determine a data modulation symbol in the group according to a reference resource position of the group, wherein a physical resource position of a DMRS corresponding to the group is associated with the reference resource position; According to the DMRS corresponding to the group, channel estimation is performed on the data modulation symbols in the group to obtain a DMRS channel estimation result.

10. The method according to claim 9, characterized in that The association relationship between the physical resource position of the DMRS and the reference resource position includes at least one of the following: The reference resource position is consistent with the physical resource position of the DMRS; or, The interval between the physical resource position of the DMRS and the reference resource position is smaller than the preset interval.

11. The method according to claim 9 or 10, characterized in that: The reference resource location includes at least one of the following: The physical resource position of the target data modulation symbol in the group, or the physical resource position of the DMRS corresponding to the group; wherein the target data modulation symbol includes a pre-specified data modulation symbol in the group.

12. The method according to claim 9 or 10, characterized in that: The interval between the physical resource position of the data modulation symbol in the group and the reference resource position of the group is smaller than a preset interval, and the preset interval includes a first frequency domain interval and / or a first time domain interval.

13. A data transmission device, characterized in that: The device comprises: A sending unit, configured to send the data modulation symbol and the demodulation reference signal DMRS according to the physical resource positions of the data modulation symbol and the DMRS on the physical resource; The physical resource position of the data modulation symbol on the physical resource is determined by a processing unit, and the processing unit is used to: Mapping the data modulation symbols onto physical resources, and dividing the mapped data modulation symbols into one or more groups, each group including at least one data modulation symbol; For any of the groups, the physical resource position of the data modulation symbol in the group is determined according to the reference resource position of the group, and the reference resource position is associated with the physical resource position of the DMRS.

14. The device according to claim 13, characterized in that The association relationship between the reference resource position and the physical resource position of the DMRS includes at least one of the following: The reference resource position is consistent with the physical resource position of the DMRS; or, The interval between the physical resource position of the DMRS and the reference resource position is smaller than the preset interval.

15. The device according to claim 13 or 14, characterized in that The reference resource location includes at least one of the following: The physical resource position of the target data modulation symbol in the group, or the physical resource position of the DMRS corresponding to the group; wherein the target data modulation symbol includes a pre-specified data modulation symbol in the group.

16. The device according to claim 13 or 14, characterized in that The interval between the physical resource position of the data modulation symbol in the group and the reference resource position of the group is smaller than a preset interval, and the preset interval includes a first frequency domain interval and / or a first time domain interval.

17. The device according to claim 13, characterized in that The processing unit is specifically used for: Skipping the data modulation symbols located at a first target resource position and grouping the data modulation symbols; wherein the first target resource position is determined in the following manner: determining the first target resource position according to a physical resource position used to send a pilot signal; or, The first target resource position is determined according to the second frequency domain interval, the second time domain interval, and the physical resource position used to send the preamble signal.

18. The device according to claim 14, characterized in that The device also includes: A first determining unit, configured to determine a reserved physical resource position of the DMRS in the group according to a reference resource position of the group and the preset interval; An inserting unit is used to insert the DMRS into the reserved physical resource position in the group.

19. The device according to claim 14, characterized in that The device also includes: A mapping unit, configured to map the DMRS to the physical resource; The second determining unit is configured to use the physical resource position of the DMRS as a reference resource position of the group corresponding to the DMRS.

20. The device according to claim 13, characterized in that The device also includes: A moving unit, configured to, for any group, fix the physical resource position of the data modulation symbol at the reference resource position in the group to remain unchanged, and move other data modulation symbols in the group to the physical resource position of the data modulation symbol; or, The physical resource position of the DMRS at the reference resource position in the group is fixed unchanged, and other data modulation symbols in the group are moved to the physical resource position of the data modulation symbols.

21. A data transmission device, characterized in that: The device comprises: A receiving unit, configured to receive data modulation symbols and a demodulation reference signal DMRS sent by a terminal; A determination unit, configured to determine a data modulation symbol in the group according to a reference resource position of the group, wherein a physical resource position of a DMRS corresponding to the group is associated with the reference resource position; The processing unit is used to perform channel estimation on the data modulation symbols in the group according to the DMRS corresponding to the group to obtain a DMRS channel estimation result.

22. The device according to claim 21, characterized in that The association relationship between the physical resource position of the DMRS and the reference resource position includes at least one of the following: The reference resource position is consistent with the physical resource position of the DMRS; or, The interval between the physical resource position of the DMRS and the reference resource position is smaller than the preset interval.

23. The device according to claim 21 or 22, characterized in that The reference resource location includes at least one of the following: The physical resource position of the target data modulation symbol in the group, or the physical resource position of the DMRS corresponding to the group; wherein the target data modulation symbol includes a pre-specified data modulation symbol in the group.

24. The device according to claim 21 or 22, characterized in that The interval between the physical resource position of the data modulation symbol in the group and the reference resource position of the group is smaller than a preset interval, and the preset interval includes a first frequency domain interval and / or a first time domain interval.

25. A terminal, characterized in that: The terminal includes: a memory, a transceiver, and a processor: A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations: Sending the data modulation symbol and the demodulation reference signal DMRS according to the physical resource positions of the data modulation symbol and the DMRS on the physical resource; The physical resource position of the data modulation symbol on the physical resource is determined by the following steps: Mapping the data modulation symbols onto physical resources, and dividing the mapped data modulation symbols into one or more groups, each group including at least one data modulation symbol; For any of the groups, the physical resource position of the data modulation symbol in the group is determined according to the reference resource position of the group, and the reference resource position is associated with the physical resource position of the DMRS.

26. The terminal according to claim 25, characterized in that The association relationship between the reference resource position and the physical resource position of the DMRS includes at least one of the following: The reference resource position is consistent with the physical resource position of the DMRS; or, The interval between the physical resource position of the DMRS and the reference resource position is smaller than the preset interval.

27. The terminal according to claim 25 or 26, characterized in that: The reference resource location includes at least one of the following: The physical resource position of the target data modulation symbol in the group, or the physical resource position of the DMRS corresponding to the group; wherein the target data modulation symbol includes a pre-specified data modulation symbol in the group.

28. The terminal according to claim 25 or 26, characterized in that: The interval between the physical resource position of the data modulation symbol in the group and the reference resource position of the group is smaller than a preset interval, and the preset interval includes a first frequency domain interval and / or a first time domain interval.

29. The terminal according to claim 25, characterized in that The processor is further configured to perform the following operations: Skipping the data modulation symbols located at a first target resource position and grouping the data modulation symbols; wherein the first target resource position is determined in the following manner: determining the first target resource position according to a physical resource position used to send a pilot signal; or, The first target resource position is determined according to the second frequency domain interval, the second time domain interval, and the physical resource position used to send the preamble signal.

30. The terminal according to claim 26, characterized in that The processor is further configured to perform the following operations: Determining a reserved physical resource position of the DMRS in the group according to the reference resource position of the group and the preset interval; The DMRS is inserted into a reserved physical resource position in the group.

31. The terminal according to claim 26, characterized in that The processor is further configured to perform the following operations: Mapping the DMRS to the physical resource; The physical resource position of the DMRS is used as the reference resource position of the group corresponding to the DMRS.

32. The terminal according to claim 25, characterized in that The processor is further configured to perform the following operations: For any group, the physical resource position of the data modulation symbol at the reference resource position in the group is fixed unchanged, and other data modulation symbols in the group are moved to the physical resource position of the data modulation symbol; or, The physical resource position of the DMRS at the reference resource position in the group is fixed unchanged, and other data modulation symbols in the group are moved to the physical resource position of the data modulation symbols.

33. A network device, characterized in that: The network device includes: a memory, a transceiver, and a processor: A memory for storing computer programs; a transceiver for transmitting and receiving data under the control of the processor; a processor for reading the The computer program in the memory described above performs the following operations: The data modulation symbol and demodulation reference signal DMRS sent by the receiving terminal; Determine a data modulation symbol in the group according to a reference resource position of the group, wherein a physical resource position of a DMRS corresponding to the group is associated with the reference resource position; According to the DMRS corresponding to the group, channel estimation is performed on the data modulation symbols in the group to obtain a DMRS channel estimation result.

34. The network device according to claim 33, characterized in that: The association relationship between the physical resource position of the DMRS and the reference resource position includes at least one of the following: The reference resource position is consistent with the physical resource position of the DMRS; or, The interval between the physical resource position of the DMRS and the reference resource position is smaller than the preset interval.

35. The network device according to claim 33 or 34, characterized in that: The reference resource location includes at least one of the following: The physical resource position of the target data modulation symbol in the group, or the physical resource position of the DMRS corresponding to the group; wherein the target data modulation symbol includes a pre-specified data modulation symbol in the group.

36. The network device according to claim 33 or 34, characterized in that: The interval between the physical resource position of the data modulation symbol in the group and the reference resource position of the group is smaller than a preset interval, and the preset interval includes a first frequency domain interval and / or a first time domain interval.

37. A processor-readable storage medium, characterized in that: The processor-readable storage medium stores a program, and the program is used to cause the processor to execute the method according to any one of claims 1 to 8.

38. A processor-readable storage medium, characterized in that: The processor-readable storage medium stores a program, and the program is used to cause the processor to execute the method according to any one of claims 9 to 12.

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