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

Abstract

The invention relates to a data transmission method and device, a terminal, network equipment, a storage medium and a computer program product. The method comprises the following steps: sending a data modulation symbol and a demodulation reference signal (DMRS) according to physical resource positions of the data modulation symbol and the DMRS on physical resources; wherein the physical resource position of the data modulation symbol on the physical resource is determined by the following steps: mapping the data modulation symbol to the physical resource, dividing the mapped data modulation symbol into one or more groups, and each group comprises at least one data modulation symbol; and for any group, determining the physical resource position of the data modulation symbol in the group according to the reference resource position of the group, the reference resource position having an association relationship with the physical resource position of the DMRS. By adopting the method and the device, the DMRS overhead can be reduced, and the accuracy of channel estimation and data demodulation can be improved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a data transmission method, apparatus, terminal, network equipment, storage medium and computer program product. Background Art

[0002] With the development and changes of mobile communications, many international organizations are beginning to study new wireless communication systems. The growth in the number of connected devices is one of the important driving forces of new wireless communication systems. However, limited by the data transmission resources of the network, it will be impossible to accommodate the initial access and data transmission of a large number of terminals using ordinary competitive access technology. Uncoordinated random access and transmission technology can support a large number of terminals because it does not require or only requires very little coordination resources between the network and the terminal.

[0003] In the non-coordinated random access and transmission technology, in order to obtain diversity gain, the data modulation symbols of the terminal may be scattered on the physical resources configured in the entire network. In order to demodulate these data modulation symbols, it is necessary to evenly insert DMRS (Demodulation Reference Signal) on the physical resources. However, when the data modulation symbols are sparse, the sparse data modulation symbols and evenly distributed DMRS will cause the DMRS overhead to be very large. Therefore, how to achieve the correct transmission of data modulation symbols with lower DMRS overhead is a technical problem that needs to be solved at present. Summary of the invention

[0004] Based on this, it is necessary to provide a data transmission method, apparatus, terminal, network equipment, storage medium and computer program product that can reduce DMRS overhead in response to the above technical problems.

[0005] In a first aspect, the present application provides a data transmission method, applied to a terminal, the method comprising:

[0006] Sending data modulation symbols and demodulation reference signals DMRS according to physical resource positions of the data modulation symbols and the demodulation reference signals DMRS on the physical resources;

[0007] The physical resource position of the data modulation symbol on the physical resource is determined by the following steps:

[0008] 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;

[0009] 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.

[0010] In one of the embodiments, 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,

[0011] The interval between the physical resource position of the DMRS and the reference resource position is smaller than the preset interval.

[0012] In one of the embodiments, the reference resource position includes at least one of the following: a physical resource position of a target data modulation symbol in a group, or a physical resource position of a DMRS corresponding to the group; wherein the target data modulation symbol includes a pre-specified data modulation symbol in the group.

[0013] 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.

[0014] In one embodiment, dividing the mapped data modulation symbols into one or more groups includes: skipping the data modulation symbols at the first target resource position and grouping the data modulation symbols; wherein the first target resource position is determined by:

[0015] 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.

[0016] In one embodiment, the method further comprises:

[0017] 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.

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

[0019] 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.

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

[0021] 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, 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.

[0022] In a second aspect, the present application provides a data transmission method, applied to a network device, the method comprising:

[0023] The data modulation symbol and demodulation reference signal DMRS sent by the receiving terminal;

[0024] Determine the data modulation symbol in the group according to the reference resource position of the group, and the physical resource position of the DMRS corresponding to the group is associated with the reference resource position;

[0025] 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.

[0026] In one of the embodiments, 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,

[0027] The interval between the physical resource position of the DMRS and the reference resource position is smaller than the preset interval.

[0028] In one of the embodiments, the reference resource position includes at least one of the following: a physical resource position of a target data modulation symbol in a group, or a physical resource position of a DMRS corresponding to the group; wherein the target data modulation symbol includes a pre-specified data modulation symbol in the group.

[0029] 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.

[0030] In a third aspect, the present application provides a data transmission device, the device comprising:

[0031] 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;

[0032] 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.

[0033] In a fourth aspect, the present application provides a data transmission device, the device comprising:

[0034] A receiving unit, configured to receive data modulation symbols and a demodulation reference signal DMRS sent by a terminal;

[0035] A determination 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;

[0036] 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, and obtain a DMRS channel estimation result.

[0037] In a fifth aspect, the present application provides a terminal, the terminal comprising: a memory, a transceiver, and a processor:

[0038] 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:

[0039] Sending data modulation symbols and demodulation reference signals DMRS according to physical resource positions of the data modulation symbols and the demodulation reference signals DMRS on the physical resources;

[0040] The physical resource position of the data modulation symbol on the physical resource is determined by the following steps:

[0041] 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;

[0042] 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.

[0043] In a sixth aspect, the present application provides a network device, the network device comprising: a memory, a transceiver, and a processor:

[0044] 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:

[0045] The data modulation symbol and demodulation reference signal DMRS sent by the receiving terminal;

[0046] Determine the data modulation symbol in the group according to the reference resource position of the group, and the physical resource position of the DMRS corresponding to the group is associated with the reference resource position;

[0047] 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.

[0048] In a seventh aspect, the present application also provides a processor-readable storage medium, which stores a program for causing a processor to execute any of the aforementioned data transmission methods.

[0049] In an eighth aspect, the present application also provides a computer program product, including a computer program, which implements any of the aforementioned data transmission methods when executed by a processor.

[0050] The above-mentioned data transmission method, device, terminal, network equipment and storage medium, 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 symbol in the group is determined according to 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 symbol and the DMRS are sent according to the physical resource position of the data modulation symbol and the DMRS on the physical resource. Using the data transmission method, device, terminal, network equipment and storage medium provided by the embodiment of the present disclosure, the data modulation symbols can be grouped, and the physical resource position of the data modulation symbol 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 are in a group aggregation state, so the same DMRS can be used for channel estimation and data demodulation, so that the overhead of the DMRS can be effectively reduced. At the same time, since the physical resource position of the DMRS and each data modulation symbol in the group is limited by the reference resource position, the accuracy of the channel estimation can also be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0052] Figure 1 is a functional block diagram of URAT in one embodiment;

[0053] Figure 2 is a schematic diagram of a single repetition sending scheme in URAT in one embodiment;

[0054] Figure 3 is a schematic diagram of a DMRS design method for a Single repetition solution in URAT in an embodiment;

[0055] Figure 4a is a schematic diagram of a multiplexing and configuration method of DMRS types in one embodiment;

[0056] Figure 4b is a schematic diagram of a multiplexing and configuration method of DMRS types in another embodiment;

[0057] Figure 5 A schematic diagram of a flow chart of a data transmission method in an embodiment;

[0058] Figure 6a is a schematic diagram of data modulation symbol mapping in one embodiment;

[0059] Figure 6b A schematic diagram of data modulation symbol group shifting in one embodiment;

[0060] Figure 6c is a schematic diagram of DMRS insertion in one embodiment;

[0061] Figure 6d A schematic diagram of another data modulation symbol group shift in one embodiment;

[0062] Figure 7a is a schematic diagram of DMRS mapping in one embodiment;

[0063] Figure 7b is a schematic diagram of data modulation symbol mapping in one embodiment;

[0064] Figure 7c A schematic diagram of data modulation symbol group shifting in one embodiment;

[0065] Figure 7dA schematic diagram of another data modulation symbol group shift in one embodiment;

[0066] Figure 8 A schematic diagram of a flow chart of a data transmission method in an embodiment;

[0067] Fig. 9 is a structural block diagram of a data transmission device in one embodiment;

[0068] Fig.10 is a structural block diagram of a data transmission device in another embodiment;

[0069] Fig.11 is an internal structure diagram of a network device in one embodiment;

[0070] Fig.12 FIG. 4 is a diagram showing the internal structure of a terminal in an embodiment. DETAILED DESCRIPTION

[0071] In the embodiments of the present invention, the term "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. In the embodiments of the present application, the term "plurality" refers to two or more than two, and other quantifiers are similar.

[0072] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0073] URAT (Uncoordinated Random Access and NOMA Transmission) is characterized by the fact that it does not require network coordination and realizes both random access and non-orthogonal multiple access transmission processes. The fact that network coordination is not required means that the network does not need to confirm the access identity of the terminal and does not need to schedule transmission resources.

[0074] URAT principle block diagram reference Figure 1 As shown, the meta-bit is generated by the bits to be transmitted, such as A bits of the bits to be transmitted, such as the cyclic redundancy check bits of the bits to be transmitted, etc. The terminal sends the preamble sequence and the data sequence at the same time, and waits for the confirmation information fed back by the base station, which indicates that the network has correctly received the information bits.

[0075] The specific meanings of the non-coordinated random access and transmission technology include:

[0076] (1) Uncoordinated: The terminal does not need UE-specific network coordination signaling in the entire process from random access to multiple access transmission, but only needs the broadcasted basic cell configuration information. Based on the broadcasted basic cell configuration information, all terminals will use exactly the same transmission scheme, and the difference between the terminals may only be the data bits to be transmitted. In order to improve the reliability of air interface transmission, the network needs to provide the terminal with feedback confirmation information of air interface transmission. The endogenous terminal identifier can be used to enable the terminal to detect the confirmation information sent by the network to itself.

[0077] (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 non-orthogonal multiple access achieved through coding of finite block length. Under the framework of compressed sensing giant address access, the distance between codewords of different terminals can be further increased. In addition to using different interleavers for coding bits, different scrambling codes can be used for coding bits, unequal diversity repetition can be used for coding blocks, and joint interleaving with blank bits in the entire time-frequency domain can be used. Among them, unequal diversity is the earliest design concept introduced by PDMA, and blank bits are placeholder bits that are not transmitted. The interleaver, scrambling code, diversity, joint interleaver, etc. used by the terminal can be determined and indicated by CRC (Cyclic Redundancy Check).

[0078] (3) Converged multiple access, the entire process from random access to multiple access transmission, all uniformly adopts URAT air interface technology. The terminal sends a preamble signal, in addition to carrying meta bits, the main purpose of which is to indicate to the network that there are multi-user coded signals transmitted simultaneously, so as to improve the detection performance of multi-user coded signals. Therefore, the preamble signal plays the role of random access. The 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, and there is no 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.

[0079] The single repetition sending scheme in URAT is as follows Figure 2 The example shown, Figure 2 It contains N data modulation symbols C and M blank symbols X, occupying all N+M physical resources, and one or more OFDM symbols are used to transmit DMRS. The transmission process includes:

[0080] The terminal receives broadcast configuration information from the base station, obtains information about data transmission resources and DMRS resources, and obtains basic information such as data coding and modulation. All terminals encode and modulate the information to be transmitted according to the same processing flow to generate data modulation symbols. The traditional method is to perform multiple repeated transmissions. In a single repetition, only one repeated transmission is performed. Assuming that the number of transmitted data modulation symbols is N, the N data modulation symbols can be expressed as C01, C02, ..., Cxk, Cx(k+1), ..., CxN. The data modulation symbol C is concatenated with M blank symbols X, and the number of X is M, which is expressed as X01, X02, ..., Xxm, Xx(m+1), ..., XxM. According to the interleaving pattern derived from the meta-bit, that is, according to the mapping relationship table between the meta-bit and the interleaving pattern agreed in advance, the interleaving pattern is determined, and according to the selected interleaving pattern, the total transmission symbol including the C symbol and the X symbol is 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 leading 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.

[0081] The current NR (New Radio) DMRS scheme is to insert pilots evenly on BWP (Bandwidth Part). Since the data transmitted in the single repetition sending scheme is relatively sparse, the scheme of evenly inserting pilots causes a large number of pilots to be inserted at positions where there is no data and no channel estimation is required, resulting in a waste of pilot overhead. That is, the evenly inserted pilot scheme may be less efficient for single repetition.

[0082] The preamble transmission scheme is to send the preamble on a subband in the BWP, and the receiving end obtains the sent preamble through correlation detection. Since the original sent preamble and the actual received preamble are known, the information can be used to perform channel estimation on this subband, and there is no need to insert additional pilots on this subband, thereby reducing the pilot resources required for each user and reducing user pilot collisions to support more users.

[0083] The DMRS design method of the single repetition solution is as follows Figure 3 As shown, a non-uniform DMRS density design is adopted, which also has the problem of DMRS overhead waste.

[0084] The DMRS of the data channel in NR adopts a pre-design concept. In each scheduling time unit, the first appearance of DMRS should be as close to the starting point of scheduling as possible. The DMRS ports of NR are multiplexed by frequency division multiplexing (FDM) and code division multiplexing (CDM). In each CDM group, orthogonal cover codes (OCC) are used to divide it into multiple ports, and CDM groups are distinguished by FDM.

[0085] NR supports two types of DMRS, and the DM-RS type used is configured through high-level signaling. DMRS can include one (single-symbol DMRS) or two (double-symbol DMRS) OFDM symbols. The multiplexing and configuration methods of the two DMRS types are described as follows:

[0086] In one DMRS type, refer to Figure 4a For single-symbol DMRS, the subcarriers in one 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 2-port multiplexing, supporting up to 4 ports. Dual-symbol DMRS adds time-domain OCCs to the single-symbol structure. Each group of comb resources occupies two consecutive OFDM symbols. Each CDM group implements 4 orthogonal ports through 4 time-frequency domain OCCs, thus supporting up to 8 orthogonal ports.

[0087] In another DMRS type, refer to Figure 4b For single-symbol DMRS, the subcarriers in one 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 2-port multiplexing, and FDM is used between groups, so a maximum of 6 ports are supported. Dual-symbol DMRS adds time-domain OCCs to the single-symbol structure. Each CDM group occupies two consecutive OFDM symbols. Each CDM group supports 4 orthogonal ports through 4 time-frequency domain OCCs, and a maximum of 12 ports are supported in 3 CDM groups.

[0088] In addition, in high-speed mobile 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 adopts 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 3 groups of additional DMRS can be configured. The number of additional DMRS depends on the high-level parameter configuration and the specific scheduling duration.

[0089] The URAT solution for 6G eliminates most of the coordination between the terminal and the network and can support scenarios with a large number of terminals. However, in the non-coordinated random access and transmission technology, due to the lack of network coordination, it is impossible to allocate completely orthogonal pilots to the terminal, and the terminal needs to independently select the pilot to send.

[0090] Among the several DMRS configurations of NR, the dual-symbol Type 2 DMRS only supports up to 12 users. When a large number of terminals select pilots autonomously, there is a serious pilot collision problem. It cannot be directly applied to the URAT solution and needs to be enhanced to support more users. Although Preamble can be used as a pilot, the bandwidth occupied by Preamble is usually small and cannot be consistent with the bandwidth occupied by data. Therefore, Preamble cannot provide the pilot required for data on other bandwidths. When transmitting in Single repetition, if DMRS is evenly inserted in areas where there is no frequency domain overlap with Preamble or in areas far away from the Preamble signal, the pilot overhead will be large.

[0091] Based on this, the embodiment of the present disclosure provides a single repetition data transmission scheme for the URAT scheme, which can achieve lower pilot overhead and better channel estimation performance by using flexible data and DMRS grouping design for data transmission in areas where there is no frequency domain overlap with the Preamble or in areas far away from the Preamble signal.

[0092] The terminal device involved in the embodiments of the present application may be a device that provides voice and / or data connectivity to a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. In different systems, the names of terminal devices may also be different. For example, in a 5G system, the terminal device may be called a 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 (PDA), 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, which are not limited in the embodiments of the present application.

[0093] The network device involved in the embodiment of the present application 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 replace the received air frame with the Internet Protocol (IP) packet, 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 embodiment of the present application may be an evolutionary network device (evolutional Node B, eNB or e-NodeB) in the long term evolution (LTE) system, a 5G base station (gNB) in the 5G network architecture (next generation system), etc., or a home evolved Node B (HeNB), a relay node, a home base station (femto), a pico base station (pico), a network test device, etc., which is not limited in the embodiment of the present application. In some network structures, the 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.

[0094] In an exemplary embodiment, a data transmission method is provided, and the method is described by taking the application of the method to a terminal device as an example. Figure 5 The data transmission method may include steps 501 to 503, wherein:

[0095] Step 503, sending data modulation symbols and demodulation reference signal DMRS according to the physical resource positions of the data modulation symbols and the demodulation reference signal DMRS on the physical resources;

[0096] The physical resource position of the data modulation symbol on the physical resource can be determined through step 501 and step 502:

[0097] Step 501, mapping data modulation symbols to physical resources, dividing the mapped data modulation symbols into one or more groups, each group including at least one data modulation symbol;

[0098] 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, and the reference resource position is associated with the physical resource position of the DMRS.

[0099] In the disclosed embodiment, before performing data transmission, the terminal may perform QPSK (Quadrature Phase Shift Keying, orthogonal phase shift keying) / 16QAM / 64QAM / 256QAM / 1024QAM and the like modulation on the transmission bits to obtain a data modulation symbol sequence composed of multiple data modulation symbols, wherein 16QAM is a QAM (Quadrature Amplitude Modulation, orthogonal amplitude modulation) containing 16 symbols, 64QAM is a QAM containing 64 symbols, 256QAM is a QAM containing 256 symbols, and 1024QAM is a QAM containing 1024 symbols.

[0100] In the embodiments 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 DMRS are mapped or inserted in the 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 and other processing, thereby greatly reducing the overhead of DMRS.

[0101] 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.

[0102] In the disclosed embodiment, the mapped data modulation symbols (hereinafter referred to as data modulation symbols) may be divided into a plurality of groups in sequence according to the agreed grouping method, wherein a group may include at least one data modulation symbol. Exemplarily, the remaining data modulation symbols may be divided into a plurality of groups according to a preset number of data modulation symbols as a group, except for the data modulation symbols for which the pilot signal is used for channel estimation, and 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.

[0103] 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.

[0104] In an exemplary embodiment, the reference resource position may include 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.

[0105] In the disclosed embodiment, the target data modulation symbol may include a data modulation symbol pre-specified in the group, for example, the first data modulation symbol or the middle data modulation symbol in the group may be used as the target data modulation symbol. In the disclosed embodiment, the target data modulation symbol is not specifically limited in the designated manner, and each group may adopt the same designated manner. After determining the target data modulation symbol, the terminal may use the physical resource of the target data modulation symbol as the reference resource position.

[0106] Alternatively, the physical resource position of the DMRS corresponding to the group may be determined first, and the physical resource of the DMRS may be used as the reference resource position. The DMRS corresponding to the group is a DMRS used for channel estimation and demodulation of the data modulation symbols in the group. When there is one DMRS corresponding to the group, the physical resource position of the DMRS may be determined as the reference resource position; or, when there are multiple DMRSs corresponding to the group, the physical resource position of a pre-specified DMRS among the multiple DMRSs (for example, the physical resource position of the first DMRS, etc.) may be determined, and the physical resource position of the pre-specified DMRS may be used as the reference resource position.

[0107] In the disclosed embodiment, no specific limitation is imposed on the method for setting the reference resource position, and each group may adopt the same method for setting the reference resource position.

[0108] 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.

[0109] 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, 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 combined accuracy requirements and the number of groups, for example: the higher the accuracy, the smaller the value, or the fewer the number of groups and 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.

[0110] Exemplarily, the available physical resource positions of the group can be determined based on the reference resource positions and preset intervals 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.

[0111] In one example, after determining the target data modulation symbol in the group, the resource position where the target data modulation symbol is located can be used as the reference resource position, and the physical resource position whose frequency domain interval with the reference resource position is less than the first frequency domain interval can be used as the physical resource position available for the group, or the physical resource position whose time domain interval with the reference resource position is less than the first time domain interval can be used as the physical resource position available for the group. Furthermore, physical resource positions can be allocated in sequence to other data modulation symbols in the group except the target data modulation symbol from the physical resource positions available for the group, that is, the physical resource positions of each data adjustment symbol in the group can be determined.

[0112] 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 whose frequency domain interval with the reference resource position is less than the first frequency domain interval can be used as the physical resource position available for the group, or the physical resource position whose time domain interval with the reference resource position is less than the first time domain interval can be used as the physical resource position available for the group. Furthermore, the physical resource position can be sequentially allocated to each data modulation symbol in the group from the physical resource positions available for the group, that is, the physical resource position of each data adjustment symbol in the group can be determined.

[0113] In one example, when determining the physical resource position available to the group based on the reference resource position and the preset interval, a preset resource position determination method may be used, and the resource position determination method may indicate the specific position of the reference resource position in the physical resource position available to the group, for example: indicating that the reference resource position is in the middle position in the physical resource position available to the group, or indicating that the reference resource position is in the head or tail position in the physical position available to the group. Exemplarily, when indicating that the reference resource position is in the middle, the physical resource positions on both sides of the reference resource position (in the frequency domain direction or the time domain direction) and the distance from the reference resource position to the reference resource position is less than the preset interval may be used as the physical resource position available to the group; or, when indicating that the reference resource position is in the head or tail, the physical resource position after or before the reference resource position (in the frequency domain direction or the time domain direction) and the distance from the reference resource position to the reference resource position is less than the preset interval may be used as the physical resource position available to the group.

[0114] After determining the available physical resource positions for each group, the available physical resource positions for the group can be allocated to the data modulation symbols 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.

[0115] In the embodiment of the present disclosure, for any group, the reference resource position of the group has an association relationship with the physical resource position of the DMRS corresponding to the group, wherein the association relationship between the reference resource position and the physical resource position of the DMRS includes at least one of the following:

[0116] 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.

[0117] In the disclosed embodiment, 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 available physical resource position of 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.

[0118] When the physical resource position of DMRS and the reference resource position of the group satisfy 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.

[0119] In the disclosed embodiment, after determining the physical resource location of the data modulation symbol and the DMRS on the physical resource, each data modulation symbol and each DMRS can be sent to the network device according to the physical resource location of the data modulation symbol and the DMRS. After the network device receives the data modulation symbol and the DMRS sent by the terminal, it can respectively use the DMRS corresponding to each group to perform operations such as channel estimation and data demodulation on the data modulation symbol in the group.

[0120] In the data transmission method provided by the embodiment of the present disclosure, the terminal can map the data modulation symbols to the 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 according to 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.

[0121] In an exemplary embodiment, dividing the mapped data modulation symbols into one or more groups may be implemented by the following steps:

[0122] The data modulation symbols located at the first target resource position are skipped and the data modulation symbols are grouped; wherein the first target resource position is determined in the following manner:

[0123] The first target resource position is determined according to a physical resource position used to send a pilot signal; or the first target resource position is determined according to a second frequency domain interval, a second time domain interval and a physical resource position used to send a pilot signal.

[0124] 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) 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.

[0125] In the embodiment of the present disclosure, the physical resource location used to send the pilot signal can be directly determined as the first target resource location. Alternatively, the physical resource location used to send the pilot signal and the physical resource location located near the physical resource location for sending the pilot signal can be determined as the first target resource location. For example, the physical resource location used to send the pilot signal can be obtained, and the 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, and the physical resource location used to send the pilot signal can be determined as the first target resource location.

[0126] Exemplarily, the physical resource locations used to send the pilot signal may constitute an area, referring to Figure 6a The edge of region B can be determined. Figure 6a The edges of area B may include edge x, edge y and edge z, and the physical resource position whose interval with edge x of area B is less than the second frequency domain interval, the physical resource position whose interval with edge y of area B is less than the second frequency domain interval, the physical resource position whose interval with edge z of area B is less than the second time domain interval, and the physical resource position in area B can be determined as the first target resource position.

[0127] 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 use the DMRS corresponding to the group for channel estimation and data demodulation.

[0128] In one example, after determining the first target resource position, during the grouping operation on 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.

[0129] In another example, after determining the first target resource position, in the process of performing a grouping operation on the data modulation symbols, the data modulation symbols located at the first target resource position participate in the grouping. Exemplarily, assuming that the first target resource position includes position 1, after the data modulation symbol grouping at position 1 redetermines the physical resource position, the physical resource position of the data modulation symbol located behind the data modulation symbol needs to be determined as position 1, that is, the data modulation symbol at the first target resource position needs to be supplemented.

[0130] It should be noted that when the physical resource locations available for a 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 for 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.

[0131] In an exemplary embodiment, the above-mentioned division of each data modulation symbol into multiple groups can be implemented by the following steps:

[0132] 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 undetermined groups.

[0133] In the disclosed embodiment, when grouping each data modulation symbol, each preset number of data modulation symbols may be determined as a group in order from the starting position of the data modulation symbol to obtain multiple groups. It should be noted that the data modulation symbol located at the first target resource position will be skipped during the grouping process. The preset number may be a preset number or a number calculated based on the preset number of groups and the number of data modulation symbols. The disclosed embodiment does not specifically limit the method for determining the preset number.

[0134] In one example, the first target resource position can be determined according to the second frequency domain interval, the second time domain interval, and the resource position of the physical resource used to send the pilot signal, and the data modulation symbol located at the first target resource position 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 in a manner of each preset number of data modulation symbols as one group.

[0135] In another example, the first target resource position can be determined according to the second frequency domain interval, the second time domain interval and the resource position of the physical resource used to send the pilot 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 there are i data modulation symbols located at the first target resource position among the preset number of data modulation symbols, 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, and the i second data modulation symbols are used as the first type of data modulation symbols, and starting from the last bit of the first type of data modulation symbol, jump to the step of sequentially determining the preset number of data modulation symbols as the second type of data modulation symbols until there are no data modulation symbols of undetermined type, and the second type of data modulation symbols are divided into multiple groups.

[0136] In an exemplary embodiment, the above method may further include:

[0137] 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, 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.

[0138] 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 also referred to as the 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 located at the physical resource positions available for the group, so the DMRS corresponding to the group can be used for channel estimation and demodulation, which can greatly reduce the DMRS overhead and improve the accuracy of channel estimation.

[0139] 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.

[0140] In an exemplary embodiment, the above method may further include:

[0141] 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.

[0142] In the embodiment of the present disclosure, when the reference resource position is the reference resource position in a group, the available physical resource position of the group can be determined based on the reference resource position of the group and the preset interval, and a reservation strategy can be used to determine the reserved physical resource position of the DMRS in the group from the available physical resource positions of the group.

[0143] The reservation strategy may be pre-set, for example, the reservation strategy may be to use the physical resource position in the middle of the group as the reserved physical resource position of the DMRS, or to use the physical resource position at the head or tail of the group as the reserved physical resource position of the DMRS, etc. The number of specific reserved physical resource positions is consistent with the number of DMRS to be inserted. In the embodiments of the present disclosure, no specific limitation is made to the reservation strategy, and each group may adopt the same reservation strategy.

[0144] The disclosed embodiments do not specifically limit the timing of DMRS insertion. For example, the data modulation symbols in the group may be moved to the corresponding physical resource positions first, and then the DMRS may be inserted into the reserved physical resource positions in the group, or the DMRS may be inserted into the reserved physical resource positions in the group, and then the data modulation symbols in the group may be moved to the corresponding physical resource positions.

[0145] In order to enable those skilled in the art to better understand the above embodiment, the above embodiment is described below by using a specific example. In this example, the terminal can perform mapping of data modulation symbols to physical resources RE, then adjust the data modulation symbols to a group aggregation state, and finally insert a DMRS symbol in each group.

[0146] Exemplarily, after the terminal generates a Preamble signal (also referred to as a pilot signal), the Preamble signal can be transmitted on a physical resource, and the physical resource used to transmit the Preamble signal is referred to as region B, and further based on the region B, the second frequency domain interval and the second time domain interval, the first target resource position is determined, and the area formed by the first target resource position is referred to as region C, and region B is included in region C. Figure 6a In fact, the demodulation of the data modulation symbols within the region C will mainly use the channel estimation obtained based on the Preamble. For the region C, no DMRS may 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 DMRS overhead and supporting more users.

[0147] The terminal uses the target interleaving dispersion method to map data modulation symbols to physical resources. Exemplarily, assuming that there are L data modulation symbols in total, after adding 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, and blank symbols refer to not transmitting any signal on the physical resources they occupy. Figures 6a to 6c As shown in , L=10, N=3, X=71, M=84.

[0148] The terminal can adjust the physical resource position of some data modulation symbols to make them grouped. 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: Figure 6b As shown, 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 one group. Data modulation symbol 4 and data modulation symbol 6 are located in area C, then 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 one group, and so on, multiple groups can be obtained.

[0149] Assuming that the first data modulation symbol in each group is used as the target data modulation symbol, the available physical resource position of each group can be determined according to the physical resource position of the first data modulation symbol in each group and the preset interval. Exemplarily, the physical resource position whose interval with the physical resource position of the first data modulation symbol is smaller than the preset interval can be used as the available physical resource position of the group, and the physical resource position can be allocated to the data modulation symbols in the group except the first data modulation symbol from the available physical resource position of the group. After the physical resource position is allocated, the sending order of each data modulation symbol in the group will not change.

[0150] The physical resource position of the first data modulation symbol in each group is fixed unchanged, and the subsequent P-1 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: Figure 6b As shown, the vicinity indicates that the minimum interval with the edge subcarrier of the first data modulation symbol is less than T1 subcarrier interval). At the same time, the corresponding physical resource position can be reserved for DMRS in the physical resource position available for the group (in Figure 6b In the example, the reserved physical resource position of the DMRS is located in the middle of the physical resource positions of the two data modulation symbols. Exemplarily, after the data modulation symbol moves to the physical resource position, the physical resource position before the data modulation symbol moves will be filled with blank symbols, and the data modulation symbol in area C remains unchanged.

[0151] It should be noted that the above-mentioned vicinity may include areas that are adjacent or close in the frequency domain or areas that are adjacent or close in the time domain. The so-called frequency domain proximity means that the interval between two physical resource locations is less than T1 subcarrier intervals, and the so-called time domain proximity means that the interval between two physical resource locations is less than T2 OFDM symbol intervals.

[0152] After completing operations such as group shifting, the terminal can insert DMRS into each group, and insert the DMRS in the DMRS sequence into the reserved physical resource position of each DMRS in the group one by one in order. Figure 6c As shown, in this example, DMRS includes DMRSa, DMRSb, and DMRSc, then DMRSa is inserted between data modulation symbol 1 and data modulation symbol 3, DMRSb is inserted between data modulation symbol 5 and data modulation symbol 7, and DMRSc is inserted between data modulation symbol 8 and data modulation symbol 10. In region C, the reserved physical resource position of DMRS can also be determined, and DMRS can be inserted in the reserved physical resource position to further improve the channel estimation performance of the region. Generally, the density of DMRS in region C is less than the density of DMRS in non-region C.

[0153] Alternatively, in another example, the data modulation symbols located in region C can also participate in grouping and movement. When grouping, if the current data modulation symbol is a data modulation symbol located in region C, the physical resource position of the subsequent data modulation symbol needs to be determined as the physical resource position of the current data modulation symbol in region C, and the subsequent data modulation symbol no longer participates in grouping. In this way, after the data modulation symbol located in region C is moved to the physical resource position in the corresponding group, the subsequent data modulation symbol can be moved to region C for filling. Figure 6d As shown, 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.

[0154] After completing the grouping and shifting of the data modulation symbols and the insertion of the DMRS, 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 in the same grouping method as the terminal side, and use the DMRS corresponding to the group to perform channel estimation and demodulation and other processing on the data modulation symbols in the group.

[0155] In an exemplary embodiment, the above method may further include:

[0156] 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.

[0157] For example, DMRS can be obtained through meta bits, and meta bits can be obtained based on bits to be transmitted, for example: meta bits are a preset number of bits of bits to be transmitted, such as cyclic redundancy check bits of bits to be transmitted. Exemplarily, the DMRS sequence corresponding to the meta bits can be determined by a pre-set mapping relationship between DMRS and meta bits. The embodiments of the present disclosure do not specifically limit the method of determining the DMRS sequence through meta bits, and any method that can determine the DMRS sequence through meta bits is applicable to the embodiments of the present disclosure.

[0158] After obtaining the DMRS sequence, a proper number of DMRS in the DMRS sequence can be mapped to the time-frequency domain resource position by uniformly equally spaced uniform reservation or uniformly random reservation. In the process of grouping the data modulation symbols, the data modulation symbols located at the first target resource position can be skipped to obtain multiple groups. The specific grouping process can refer to the aforementioned embodiment, and will not be repeated in the embodiments of the present disclosure.

[0159] In order to enable those skilled in the art to better understand the above embodiment, the above embodiment is described below through specific examples. In this example, a DMRS-centered packet transmission method is considered. First, the terminal maps the data modulation symbol to the physical resource RE, and maps the DMRS to the physical resource RE (the order of performing the mapping of the DMRS to the physical resource and the mapping of the data modulation symbol to the physical resource is not specifically limited in the embodiment of the present disclosure), and finally adjusts the data modulation symbol around the DMRS to the vicinity of the DMRS to form a group aggregation state.

[0160] Exemplarily, after the terminal generates the Preamble signal, the Preamble signal can be transmitted on a physical resource, and the physical resource used to transmit the Preamble signal is called area B, and the first target resource position is further determined based on the physical resource, the second frequency domain interval, and the second time domain interval. The area formed by the first target resource position is called area C, and area B is included in area C. Figure 7a The demodulation of the data modulation symbols within the region C will mainly use the channel estimation obtained based on the Preamble. For the region C, no DMRS may 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 DMRS overhead and supporting more users.

[0161] Outside of area C, the terminal can reserve N physical resource locations for DMRS by using uniform reservation at equal intervals or uniform random reservation, where N is the number of time-frequency domain resources occupied by DMRS (and other overheads), and map DMRS to the corresponding physical resource locations. Figure 7bAs shown, the reservation method is a uniform random method, in which N=3. In this example, the physical resource positions of N DMRSs are located outside the area C, that is, the DMRS is not inserted in the first target resource position.

[0162] The terminal uses the target interleaving dispersion method to map data modulation symbols to physical resources. In the scenario where DMRS mapping is performed first, the terminal can add X blank symbols to L data modulation symbols, and then use an interleaver with an interleaving depth of MN to disperse the data modulation symbols to MN time-frequency domain resources configured by the network, where M = L + X + N. Figures 7a to 7c As shown in , L=10, N=3, X=71, and M=84. Alternatively, in the scenario where the mapping of the data modulation symbols is performed first, an interleaver with an interleaving depth of M is used.

[0163] The terminal can adjust the resource position of some data modulation symbols near the physical resource position of DMRS to achieve group aggregation. 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 grouping, the data modulation symbols located in area C are skipped, for example: Figure 7c As shown, 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 one group. Data modulation symbol 4 and data modulation symbol 6 are located in area C, then 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 one group, and so on, multiple groups can be obtained.

[0164] Multiple groups are matched one by one with multiple DMRS in sequence (in this example, each group corresponds to one DMRS). According to the physical resource position and preset interval of the corresponding DMRS in each group, the physical resource position available for each group can be determined. Exemplarily, the physical resource position with an interval less than the preset interval between the physical resource position of the DMRS can be used as the physical resource position available for the group, and the physical resource position can be allocated to each data modulation symbol in the group from the physical resource position available for the group. After the physical resource position is allocated, the sending order of each data modulation symbol in the group will not change.

[0165] 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).

[0166] For example, Figure 7c As shown, 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 unchanged, 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 located 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 located on both sides of DMRS b, and after the data modulation symbol 8 and the data modulation symbol 10 in group 3 are moved to their respective physical resource positions, the data modulation symbol 8 and the data modulation symbol 10 will be located on both sides of DMRS c.

[0167] Alternatively, in another example, the data modulation symbols located in region C can also participate in grouping and movement. When grouping, if the current data modulation symbol is a data modulation symbol located in region C, the physical resource position of the subsequent data modulation symbol needs to be determined as the physical resource position of the current data modulation symbol in region C, and the subsequent data modulation symbol no longer participates in grouping. In this way, after the data modulation symbol located in region C is moved to the physical resource position in the corresponding group, the subsequent data modulation symbol can be moved to region C for filling. Figure 7d As shown, 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.

[0168] 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 and other processing on the data modulation symbols in the group.

[0169] In an exemplary embodiment, Figure 8 As shown, a data transmission method is provided, and the method is applied to a network device as an example for explanation. The network device may include a base station and other devices, and includes the following steps 801 to 803. Among them:

[0170] Step 801, receiving data modulation symbols and demodulation reference signals DMRS sent by a terminal;

[0171] Step 802, 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;

[0172] Step 803: 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.

[0173] In the disclosed embodiment, after the terminal groups the data modulation symbols, it can determine the reference resource position of each group based on the setting method of the pre-set reference resource position, and determine the physical resource position of each data modulation symbol in the group according to the reference resource position in the group, and each group has a corresponding DMRS, so that 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 disclosed embodiment. After determining the physical resource position of the data modulation symbol and the DMRS, the terminal can send each data modulation symbol and each DMRS to the network device according to the physical resource position of each data modulation symbol and each DMRS.

[0174] 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, and then the network device can determine the interleaving method used by the terminal based on the meta-bit after obtaining the meta-bit, and then determine the reference resource position corresponding to each group 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, and then determine the physical resource position available for each group based on the reference resource position and the preset interval. 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.

[0175] 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.

[0176] In the 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.

[0177] 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 a 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.

[0178] In one example, an interval between a physical resource position of a data modulation symbol in a group and a 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.

[0179] Among them, the specific determination of the reference resource position, and the process of determining the physical resource position available for the group based on the reference resource position and the preset interval, etc., can be referred to the relevant description of the aforementioned embodiment, and no specific limitation is made in the embodiments of the present disclosure.

[0180] In the disclosed embodiment, the association 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.

[0181] In the disclosed embodiment, after receiving the 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 with 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.

[0182] 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 has an associated relationship 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, and at the same time, because 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.

[0183] 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 through specific examples.

[0184] In one example, when the terminal performs URAT transmission, it first selects the Preamble sequence to be used according to the meta bit, generates a preamble signal, and completes the transmission process of the preamble signal, wherein the preamble signal carries the meta bit. Using the single repetition (single repetition) data modulation symbol interleaving and dispersion method, the terminal determines the interleaver based on the meta bit, and can process the data modulation symbol with the interleaver, and then disperse the data modulation symbol to the time-frequency domain resources configured by the network. The interleaver is determined by the meta bit, for example, the meta bit is used as the initialization seed of the generating register for generating the MN random order.

[0185] The terminal divides the data modulation symbols into a group according to a preset number of data modulation symbols to obtain multiple groups, and determines the available physical resource position of each group according to the physical resource position of the target modulation symbol specified in the group and the preset interval, and determines the physical resource position of each data modulation symbol in the group from the available physical resource position of the group, and adjusts some data modulation symbols in the group to their respective physical resource positions to make them group-aggregated. The reserved physical resource position of DMRS is determined in the available physical resource position in the group, and the DMRS is inserted into the reserved physical resource position in each group one by one in sequence, wherein the DMRS sequence is determined by the meta bit, and the meta bit is used as the UE ID in the DMRS sequence generation process.

[0186] The terminal sends each data modulation symbol and DMRS to the network device according to the physical resource position of the data modulation symbol and DMRS, and does not send any signal at the physical resource position occupied by the blank symbol.

[0187] After receiving the preamble signal sent by the terminal, the network device performs sequence detection on the preamble signal to obtain the meta-bit, and performs channel estimation based on the sequence detection result of the preamble signal (actual transmission signal) and the received Preamble sequence (actual reception signal) to obtain the preamble channel detection result. The network device determines the interleaver used by the terminal based on the detected meta-bit, 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 position 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 positions through the interpolation algorithm for subsequent data demodulation calculation, including: performing corresponding detection and decoding on the data modulation, and sending feedback information to the terminal when it is determined that the URAT transmission is correctly received.

[0188] 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.

[0189] In another example, when the terminal performs URAT transmission, it first selects the Preamble sequence to be used according to 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 adopts equal interval uniform reservation or uniform random reservation, etc., and maps N DMRS to N physical resource positions outside area C (the data modulation symbols in area C use the preamble signal for channel estimation, and the determination method of 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 positions are determined by the meta bit, for example: the mapping relationship between the DMRS sequence and the meta bit set in advance can be adopted, and the mapping relationship between the reserved physical resource position and the meta bit can be used to determine the DMRS sequence and the reserved N physical resource positions.

[0190] The terminal uses the single repetition data modulation symbol interleaving and dispersion method, determines the interleaver based on the meta-bit, and after processing the data modulation symbol with the interleaver, scatters the data modulation symbol to the physical resources configured by the network. The interleaver is determined by the meta-bit, for example, the meta-bit is used as the initialization seed of the generating register for generating the random order of the MN. The terminal divides the data modulation symbol into a group according to a preset number of pieces, obtains multiple groups, and after each group is matched with the DMRS one by one, determines the available physical resource position of each group according to the physical resource position and preset interval of the DMRS corresponding to the group, and allocates the physical resource position to each data modulation symbol in the group from the available physical resource position of the group, and adjusts each data modulation symbol in the group to the corresponding physical resource position, so that it becomes a group aggregation state.

[0191] The terminal sends each data modulation symbol and DMRS to the network device according to the physical resource position of the data modulation symbol and DMRS, and does not send any signal at the physical resource position occupied by the blank symbol.

[0192] After receiving the preamble signal sent by the terminal, the network device performs sequence detection on the preamble signal to obtain the meta-bit, and performs channel estimation based on the sequence detection result of the preamble signal (actual transmission signal) and the received Preamble sequence (actual reception signal) to obtain the preamble channel detection result. The network device determines the interleaver used by the terminal based on the detected meta-bit, 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 position 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 positions through the interpolation algorithm for subsequent data demodulation calculation, including: performing corresponding detection and decoding on the data modulation, and sending feedback information to the terminal when it is determined that the URAT transmission is correctly received.

[0193] 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.

[0194] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed 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 part of the steps or stages in other steps.

[0195] Based on the same inventive concept, the embodiment of the present application also provides a data transmission device for implementing the data transmission method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more data transmission device embodiments provided below can refer to the limitations on the data transmission method above, and will not be repeated here.

[0196] In an exemplary embodiment, Fig. 9 As shown, a data transmission device is provided, including: a sending unit 902 and a processing unit 904, wherein:

[0197] The sending unit 902 is 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 demodulation reference signal DMRS on the physical resource;

[0198] 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 used to:

[0199] 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;

[0200] 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.

[0201] 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:

[0202] 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.

[0203] 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 a 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.

[0204] In one example, an interval between a physical resource position of a data modulation symbol in a group and a 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.

[0205] In one example, the mapped data modulation symbols are divided into one or more groups, including:

[0206] Skipping the data modulation symbols at the first target resource position and grouping the data modulation symbols; wherein the first target resource position is determined in the following manner:

[0207] 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.

[0208] In one example, the apparatus further comprises:

[0209] 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;

[0210] The inserting unit is used to insert the DMRS into the reserved physical resource position in the group.

[0211] In one embodiment, the device further comprises:

[0212] A mapping unit, used for mapping the DMRS to physical resources;

[0213] 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.

[0214] In one embodiment, the device further comprises:

[0215] A mobile unit is used for, for any group, fixing the physical resource position of the data modulation symbol at the reference resource position in the group to remain unchanged, and moving other data modulation symbols in the group to the physical resource position of the data modulation symbol; or, fixing the physical resource position of the DMRS at the reference resource position in the group to remain unchanged, and moving other data modulation symbols in the group to the physical resource position of the data modulation symbol.

[0216] In an exemplary embodiment, Fig.10 As shown, a data transmission device is provided, including: a receiving unit 1002, a determining unit 1004 and a processing unit 1006, wherein:

[0217] The receiving unit 1002 is configured to receive a data modulation symbol and a demodulation reference signal DMRS sent by a terminal;

[0218] 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;

[0219] 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.

[0220] In an example, the association relationship between the physical resource position of the DMRS and the reference resource position includes at least one of the following:

[0221] 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.

[0222] In one example, the reference resource location includes at least one of the following:

[0223] 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.

[0224] In one example, an interval between a physical resource position of a data modulation symbol in a group and a 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] It should be noted that the division of units in the embodiments of the present disclosure is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional unit in each embodiment of the present disclosure may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0226] 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 is essentially 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, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (processor) to perform all or part of the steps of the method described in each embodiment of the present application.

[0227] 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.

[0228] In an exemplary embodiment, Fig.11 As shown, the present application provides a network device, the network device includes: a memory, a transceiver, and a processor:

[0229] 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:

[0230] The data modulation symbol and demodulation reference signal DMRS sent by the receiving terminal;

[0231] Determine the data modulation symbol in the group according to the reference resource position of the group, and the physical resource position of the DMRS corresponding to the group is associated with the reference resource position;

[0232] 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.

[0233] In one of the embodiments, the association 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 a preset interval.

[0234] In one of the embodiments, the reference resource position includes at least one of the following: a physical resource position of a target data modulation symbol in a group, or a physical resource position of a DMRS corresponding to the group; wherein the target data modulation symbol includes a pre-specified data modulation symbol in the group.

[0235] 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.

[0236] The transceiver is used to receive and send data under the control of the processor x10. Fig.11 In the embodiment of the present invention, the bus architecture may include any number of interconnected buses and bridges, specifically linking together various circuits of one or more processors represented by a processor and a memory represented by a memory. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, such as a wireless channel, a wired channel, an optical cable, and the like. The processor is responsible for managing the bus architecture and general processing, and the memory may store data used by the processor x10 when performing operations.

[0237] 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.

[0238] It should be noted here that the above-mentioned device provided in the embodiment of the present invention 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 that are the same as the method embodiment in this embodiment will not be described in detail here.

[0239] In an exemplary embodiment, Fig.12 As shown, the present application provides a terminal, the terminal comprising: a memory, a transceiver, and a processor:

[0240] 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:

[0241] Sending data modulation symbols and demodulation reference signals DMRS according to physical resource positions of the data modulation symbols and the demodulation reference signals DMRS on the physical resources;

[0242] The physical resource position of the data modulation symbol on the physical resource is determined by the following steps:

[0243] 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;

[0244] 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.

[0245] In one of the embodiments, the association 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 a preset interval.

[0246] In one of the embodiments, the reference resource position includes at least one of the following: a physical resource position of a target data modulation symbol in a group, or a physical resource position of a DMRS corresponding to the group; wherein the target data modulation symbol includes a pre-specified data modulation symbol in the group.

[0247] 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.

[0248] In one of the embodiments, 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 in the following manner: 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.

[0249] In one of the embodiments, 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.

[0250] In one of the embodiments, 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.

[0251] In one of the embodiments, 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 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 other data modulation symbols in the group are moved to the physical resource position of the data modulation symbol.

[0252] The transceiver is used to receive and send data under the control of the processor. Fig.12 In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by a processor and various circuits represented by a memory linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, including wireless channels, wired channels, optical cables, and other transmission media. For different user devices, the user interface may also be an interface capable of externally and internally connecting required devices, and the connected devices include but are not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

[0253] 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.

[0254] 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.

[0255] The processor calls the program stored in the memory to execute any of the methods provided in the embodiments of the present application according to the obtained executable instructions. The processor and the memory can also be arranged physically separately.

[0256] It should be noted here that the above-mentioned device provided in the embodiment of the present invention 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 that are the same as the method embodiment in this embodiment will not be described in detail here.

[0257] The present application also provides a processor-readable storage medium, which stores a program for causing a processor to execute any of the aforementioned data transmission methods.

[0258] 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, magnetic tapes, magneto-optical disks (MO)), optical storage (such as CD, DVD, BD, HVD, etc.), and semiconductor storage (such as ROM, EPROM, EEPROM, non-volatile memory (NANDFLASH), solid-state drive (SSD)), etc.

[0259] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) that contain computer-usable program code.

[0260] The present application 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 application. 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 generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0261] 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 an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0262] 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 application 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.

[0263] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed 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 the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an 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 application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0264] The technical features of the above embodiments may 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.

[0265] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached 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. 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.

15. 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.

16. A network device, characterized in that: The network device 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: 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.

17. 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.

18. 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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