Demodulation reference signal configuration method and apparatus

Abstract

The embodiment of the application discloses a demodulation reference signal configuration method and device. The method comprises the following steps: a terminal device determines a time-frequency domain resource of a demodulation reference signal (DMRS), and can capture fine perturbation of a channel in a time domain according to the time-frequency domain resource of the DMRS, so that the filtering performance is improved.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a demodulation reference signal configuration method and apparatus. Background Technology

[0002] In 5G NR systems, front-loaded DMRS is supported for the demodulation reference signal (DMRS). When the inter-symbol channel disturbances are small, the base station configures front-loaded DMRS for the terminal device. However, subtle inter-symbol channel disturbances (such as those caused by the doppler environment) are difficult to remove. Therefore, how to capture subtle channel disturbances in the time domain and improve filtering performance is a crucial technical problem that needs to be solved. Summary of the Invention

[0003] This application provides a demodulation reference signal configuration method and apparatus that can capture subtle disturbances in the channel in the time domain and improve filtering performance.

[0004] In a first aspect, embodiments of this application provide a demodulation reference signal configuration method, the method comprising:

[0005] Determine the time-frequency domain resources of the demodulation reference signal DMRS.

[0006] Secondly, embodiments of this application provide a demodulation reference signal configuration apparatus, the apparatus comprising:

[0007] The processing unit is used to determine the time-frequency domain resources of the demodulation reference signal DMRS.

[0008] Thirdly, embodiments of this application provide a terminal device, the terminal device including a processor, a memory, a communication interface, and one or more programs, the one or more programs being stored in the memory and configured to be executed by the processor, the programs including instructions for performing some or all of the steps described in the method described in the first aspect above.

[0009] Fourthly, embodiments of this application provide a computer-readable storage medium storing a computer program for electronic data interchange, wherein the computer program causes a computer to perform some or all of the steps described in the method described in the first aspect above.

[0010] Fifthly, embodiments of this application provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, the computer program being operable to cause a computer to perform some or all of the steps described in the method described in the first aspect of embodiments of this application. The computer program product may be a software installation package.

[0011] The technical solution provided in this application allows the terminal device to determine the time-frequency domain resources of the demodulation reference signal DMRS. Based on the time-frequency domain resources of the DMRS, it can capture subtle disturbances in the channel in the time domain and improve filtering performance. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of a communication system provided in an embodiment of this application;

[0014] Figure 2 This is a schematic flowchart of a demodulation reference signal configuration method provided in an embodiment of this application;

[0015] Figure 3 This is a flowchart illustrating another demodulation reference signal configuration method provided in an embodiment of this application;

[0016] Figure 4 This is a flowchart illustrating another demodulation reference signal configuration method provided in an embodiment of this application;

[0017] Figure 5 This is a flowchart illustrating another demodulation reference signal configuration method provided in an embodiment of this application;

[0018] Figure 6 This is a flowchart illustrating another demodulation reference signal configuration method provided in an embodiment of this application;

[0019] Figure 7 This is a functional unit block diagram of a demodulation reference signal configuration device provided in an embodiment of this application;

[0020] Figure 8 This is a schematic diagram of the structure of a terminal device provided in an embodiment of this application. Detailed Implementation

[0021] The embodiments of this application are described below with reference to the accompanying drawings.

[0022] It should be understood that the technical solutions of the embodiments of this application can be applied to Global System for Mobile Communication (CSM), Code Division Multiple Access (CDMA) systems, Wideband Code Division Multiple Access (WCDMA) systems, Worldwide Interoperability for Microwave Access (Wi-MAX) systems, Long Term Evolution (LTE) systems, 5G communication systems (e.g., New Radio (NR)), communication systems integrating multiple communication technologies (e.g., communication systems integrating LTE and NR technologies), or are applicable to various new communication systems in the future, such as 6G and 7G communication systems. The embodiments of this application do not limit these applications. The technical solutions of the embodiments of this application are also applicable to different network architectures, including but not limited to relay network architectures, dual-link architectures, and vehicle-to-everything (V2X) architectures.

[0023] This application relates to terminal devices. Terminal devices include devices with wireless communication capabilities, such as mobile phones, tablets, computers with wireless transceiver capabilities, virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, wireless terminals in industrial control, wireless terminals in self-driving vehicles, wireless terminals in remote medical care, wireless terminals in smart grids, and wireless terminals in smart homes. Terminal devices can also be handheld devices with wireless communication capabilities, in-vehicle devices, wearable devices, computer equipment or other processing devices connected to a wireless modem, terminal devices in future 5G networks, or terminal devices in future evolved Public Land Mobile Networks (PLMNs), etc. Terminal devices may be called by different names in different networks, such as: user equipment, access terminal, user unit, user station, mobile station, mobile station (MS), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, cellular phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA), terminal device in 5G network or future evolved network, etc., and the embodiments of this application are not limited to this.

[0024] This application relates to network devices. Network devices can be devices used to communicate with terminal devices, including devices for Radio Access Networks (RANs), RAN base station controllers, and core network devices. For example, network devices can be base stations of the RAN on the access network side of a cellular network, including but not limited to: evolved Node B (eNB), Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home base station (e.g., Home evolved Node B, or Home Node B, HNB), Base Band Unit (BBU), and Mobility Management Entity (MME); as another example, network devices can also be node devices in a Wireless Local Area Network (WLAN), such as Access Controller (AC), gateway, or Wi-Fi Access Point (AP); furthermore, network devices can also be access network devices (e.g., gNB, CU, DU) in an NR system, and further evolved Node Bs (ng-eNB), where the gNB and terminal devices communicate using NR technology, and the ng-eNB and terminal devices communicate using E-UTRA (Evolved Universal Terrestrial) technology. Communication is achieved using Radio Access (RAD) technology, and both gNB and ng-eNB can connect to the 5G core network. The network equipment in this application embodiment also includes devices that provide base station functionality in future new communication systems.

[0025] Please see Figure 1 , Figure 1 This is a schematic diagram of the architecture of a communication system provided in an embodiment of this application. Figure 1 As shown, the communication system includes network devices and terminal devices; here, we take b=3 as an example. Network devices provide wireless access services to terminal devices. Each network device corresponds to a service coverage area, and terminal devices entering that area can communicate with the network device via wireless signals. Furthermore, network devices can also communicate with each other.

[0026] based on Figure 1The system architecture shown illustrates that when communication is established between the network device and the terminal device, the network device indicates the relative DMRS resources to the terminal device to ensure smooth data transmission of DL / UL. Specifically, the network device determines at least one antenna port for the terminal device to transmit / receive data and / or signaling. Then, the network device determines the DMRS resources for each of these at least one antenna port. The terminal device can perform channel estimation based on the DMRS to achieve demodulation of the physical channel. In the relevant channel estimation algorithm, the receiver first obtains the values ​​at the reference signal (RS) or pilot position in the frequency domain (after FFT), and obtains the channel value at the reference signal position using the least squares (LS) method. Then, the channel values ​​at the reference signal and data positions are obtained through interpolation, and then filtered (denoised) to obtain the desired channel values ​​at the reference signal and data positions; alternatively, the channel values ​​at the reference signal position are first obtained through filtering (denoising), and then the desired channel values ​​at the reference signal and data positions are obtained through interpolation. However, filtering and interpolation are linear operations, and it is difficult to remove disturbances caused by (colored) noise, interference, and non-ideal factors (caused by RF devices and the wireless environment), especially when channel statistics (such as delay spread, Doppler spread, etc.) are also biased.

[0027] Currently, 5G NR systems retain the configuration of only a front-loaded demodulation reference signal (DMRS). When the time-domain (inter-symbol) channel disturbance is small, such as a small doppler, the base station will configure the front-loaded DMRS, but no additional demodulation reference signal (DMRS) will be configured on the symbols following the front-loaded DMRS. In this case, subtle time-domain (inter-symbol) channel disturbances are difficult to remove, affecting the channel demodulation performance.

[0028] To address the aforementioned issues, this application proposes a demodulation reference signal configuration method. The terminal device determines the time-frequency domain resources of the DMRS, and the subcarriers of the DMRS can be distributed across multiple symbols. This utilizes the channel correlation at the subcarrier level to maintain sufficient smoothness in the frequency domain, enabling the AI-based channel estimation algorithm to capture subtle disturbances in the time domain (between symbols), thereby improving filtering performance.

[0029] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0030] Please see Figure 2 , Figure 2 This is a schematic flowchart of a demodulation reference signal configuration method provided in an embodiment of this application, which is applied to, for example... Figure 1 The communication system shown. (As shown) Figure 2 As shown, the method includes the following steps.

[0031] S210, The terminal equipment determines the time-frequency domain resources of the demodulation reference signal DMRS.

[0032] In this application, the terminal device determines the time-frequency domain resources (i.e., DMRS location) of the DMRS based on the configuration of the network device. For example, the network device can configure DMRS through higher-layer parameters or instruct DMRS configuration-related information via Downlink Control Information (DCI). When the terminal device receives the instruction of DMRS configuration-related information, it determines the DMRS time-frequency domain resources according to the agreed resource mapping rules. To remove channel disturbances in the time domain of the DMRS, this application introduces artificial intelligence at the receiving end. Artificial intelligence is applied to remove subtle channel disturbances in the time domain. For example, after obtaining the channel values ​​at the reference signal and data location through interpolation, the channel values ​​can be input as an image (two-dimensional time-frequency data, i.e., symbols and subcarriers) into an artificial intelligence network (such as a neural network). The artificial intelligence network then outputs a filtered image, thereby removing subtle channel disturbances in the time domain.

[0033] In order to capture subtle channel disturbances in the time domain (between symbols), network devices can modify a single front-loaded DMRS or additional DMRS into multiple front-loaded DMRS or multiple additional DMRS (multiple in the time domain) with a certain symbol interval when configuring DMRS. This increases the number of symbols in the DMRS, enabling AI-based channel estimation algorithms to capture subtle channel disturbances in the time domain (between symbols) and improve filtering performance.

[0034] In one possible example, the DMRS shifts a subset of subcarriers in the frequency domain by x symbols, where x is a positive integer.

[0035] The subcarrier subset can be a set of subcarriers that are spaced apart in the DMRS subcarriers, for example, a set of subcarriers with even subcarrier indices or a set of subcarriers with odd subcarrier indices; the subcarrier set can also be a set of consecutively adjacent subcarriers in the DMRS subcarriers, for example, a set of subcarriers in the first half of the subcarriers or a set of subcarriers in the second half of the subcarriers. Other subcarrier subset division methods are also applicable to this application, and the embodiments of this application do not limit this.

[0036] Specifically, this application can extend the time-domain resources (symbols) of DMRS by shifting some subcarriers of DMRS in the frequency domain to another symbol, thus splitting DMRS into multiple DMRS, enabling artificial intelligence networks to capture subtle disturbances in the time domain as much as possible, thereby improving filtering performance.

[0037] In one possible example, the subcarriers of the DMRS are repeated on the xth symbol after the symbol position of the DMRS.

[0038] In this embodiment, the DMRS subcarrier can be repeated on the xth symbol after the DMRS symbol position to extend the DMRS time-domain resources (symbols). Specifically, the DMRS subcarrier is also configured on the xth symbol after the current DMRS symbol position, thus splitting the DMRS into multiple DMRS, enabling the artificial intelligence network to capture subtle disturbances in the time domain as much as possible, thereby improving filtering performance.

[0039] This application can also simultaneously downsample the repeating DMRS in the frequency domain (subcarriers) by a factor of m, where m is a positive integer, thereby reducing the resource overhead of the DMRS. For example, if the repeating DMRS subcarriers are downsampled by a factor of 2, the resource usage of the repeating DMRS in the frequency domain will be half of the original.

[0040] It should be noted that the implementation steps of DMRS subcarrier repetition and downsampling in this application are not limited. This application may first repetite the DMRS subcarrier and then downsample the repetitive DMRS subcarrier; or it may first downsample the DMRS subcarrier and then repetite the downsampled DMRS subcarrier.

[0041] For example, this application can first sample the repeated DMRS on the xth symbol after the current DMRS symbol, and then downsample the repeated DMRS subcarriers. For example, this application can also first sample the DMRS subcarriers by m times and then repeat them on the xth symbol after the current DMRS symbol. In this way, the resource occupation of the repeated DMRS in the frequency domain is 1 / m of the original, thereby reducing the resource overhead of the DMRS.

[0042] Optionally, the Physical Downlink Shared Channel (PDSCH) decoding time and / or Physical Uplink Shared Channel (PUSCH) preparation time are increased by t symbols, where t is a positive integer.

[0043] Because the DMRS is shifted or repeated in the time domain, and the receiver's channel estimation algorithm starts after the last symbol of the DMRS, the receiver's decoding completion time is delayed. The NR defines the PDSCH processing time capacity, namely the PDSCH decoding time N1 and / or PUSCH preparation time N2. Since the DMRS is extended in the time domain, the PDSCH decoding time N1 and / or PUSCH preparation time N2 also need to be increased.

[0044] Specifically, when the time-domain resources (symbols) of the DMRS are expanded, i.e., the DMRS subcarrier is shifted by x symbols in the time domain or repeated at the xth symbol after the current symbol position, this application increases the PDSCH decoding time N1 and / or PUSCH preparation time N2 by a factor of t, thereby enabling the terminal device to complete channel estimation and realize the decoding of the physical channel. For example, t is less than or equal to x, such that the increase in N1 and / or N2 is kept as small as possible, not exceeding the shifted or repeated x symbols.

[0045] Optionally, the DMRS is a front-loaded DMRS.

[0046] When only a front-loaded DMRS is configured, subtle disturbances in the time-domain (inter-symbol) channel are difficult to remove, which can affect the accuracy of channel estimation by the terminal device. Therefore, in order to capture subtle disturbances in the time-domain (inter-symbol) channel, network devices can modify a single front-loaded DMRS into multiple front-loaded DMRSs (multiple in the time domain) with a certain symbol interval when configuring DMRS, increasing the number of symbols in the DMRS. This allows the AI-based channel estimation algorithm to capture subtle disturbances in the time-domain (inter-symbol) channel, improving filtering performance.

[0047] In one possible example, the offset between the symbol position of the front-loaded DMRS and the symbol position of the additional demodulation reference signal (DMRS) is y, where y is a positive integer.

[0048] In the embodiments of this application, when the disturbance of the time domain (inter-symbol) channel is small, an additional demodulation reference signal, additional DMRS, can be configured after configuring front-loaded DMRS to ensure the quality of channel estimation.

[0049] Currently, higher-layer parameters can indicate the symbol (time-domain) position of the additional DMRS. This symbol position can be a symbol index within a time slot (which can be considered an absolute position). The symbol position of the additional DMRS consists of multiple candidate positions, represented in a table. The sender and receiver can obtain the DMRS symbol position by looking up the table using the higher-layer parameters PDSCH mapping type, dmrs-AdditionalPosition, and the number of PDSCH symbols (or the end symbol position). This is done because a filtering interpolation algorithm in related channel estimation algorithms only considers the position of one reference signal. However, AI-based channel estimation algorithms (filtering interpolation) do not concern themselves with the position of the reference signal, thus allowing for greater flexibility in the reference signal. Therefore, in this application, the higher-layer parameters can indicate the offset of the additional DMRS symbol position from the front-loaded DMRS by y symbols, where y is a positive integer. Indicating this offset reduces signaling overhead (compared to indicating the absolute position).

[0050] In one possible example, the subcarriers of the front-loaded DMRS and the subcarriers of the additional DMRS are downsampled by a factor of m, where m is a positive integer.

[0051] In this embodiment, when the disturbance in the time domain (inter-symbol) channel is small, an additional demodulation reference signal, additional DMRS, can be configured after configuring the front-loaded DMRS to ensure the quality of channel estimation. Furthermore, when higher-layer parameters indicate downsampling, the front-loaded DMRS and additional DMRS can be downsampled m times in the frequency domain (subcarrier) to reduce the resource overhead of the front-loaded DMRS and additional DMRS.

[0052] As can be seen, this application proposes a demodulation reference signal configuration method. The terminal device determines the time-frequency domain resources of the demodulation reference signal DMRS. Based on the time-frequency domain resources of the DMRS, it can capture subtle disturbances in the channel in the time domain and improve filtering performance.

[0053] Please see Figure 3 , Figure 3 This is a schematic flowchart of another demodulation reference signal configuration method provided in an embodiment of this application, applied to, for example... Figure 1 The communication system shown. (As shown) Figure 3 As shown, the method includes the following steps.

[0054] S310. The terminal device determines the time-frequency domain resources of the DMRS, wherein the subcarrier subset of the DMRS in the frequency domain is shifted by x symbols, where x is a positive integer.

[0055] In this application, the time-domain resources (symbols) of the DMRS can be extended by shifting some subcarriers of the DMRS in the frequency domain to another symbol, thus splitting the DMRS into multiple DMRS (multiple in the time domain), enabling the artificial intelligence network to capture subtle disturbances in the time domain as much as possible, thereby improving filtering performance.

[0056] Optionally, the subcarrier subset of the DMRS in the frequency domain is shifted by x symbols, including: the set of even-numbered subcarriers in the corresponding subcarriers of each antenna port of the DMRS is shifted by the x symbols, wherein the set of even-numbered subcarriers is the set of subcarriers with even subcarrier indices; or, the set of odd-numbered subcarriers in the corresponding subcarriers of each antenna port of the DMRS is shifted by the x symbols, wherein the set of odd-numbered subcarriers is the set of subcarriers with odd subcarrier indices.

[0057] Specifically, the network device can shift all even-indexed subcarriers in the subcarriers corresponding to each antenna port of the DMRS by x symbols. In other words, the even-indexed subcarriers in the DMRS are shifted by x symbols, while the odd-indexed subcarriers remain in the currently configured symbols. This results in the subcarriers corresponding to each antenna port of the originally configured DMRS being staggered, effectively splitting each antenna port into two DMRSs. This is beneficial for utilizing subcarrier-level channel correlation to maintain sufficient smoothness in the frequency domain.

[0058] For example, the network device can also shift all subcarriers with odd subcarrier indices in each antenna port of the DMRS by x symbols. That is, the odd-numbered subcarriers in the DMRS are shifted by x symbols, while the even-numbered subcarriers remain in the currently configured symbols. This makes the subcarriers corresponding to each antenna port of the originally configured DMRS staggered, thus splitting each antenna port into two DMRSs. This is beneficial for utilizing subcarrier-level channel correlation to maintain sufficient smoothness in the frequency domain.

[0059] Optionally, shifting the subcarrier subset of DMRS in the frequency domain by x symbols includes:

[0060] When the offset within the subcarrier group of the DMRS subcarrier is 0, the symbol position of the DMRS is the first symbol position plus x, where the first symbol position is the symbol position configured by the network device based on a lookup table; or the symbol start position of the DMRS is the first symbol start position plus x, where the first symbol start position is the symbol start position configured by the network device based on a lookup table; or, when the offset within the subcarrier group of the DMRS subcarrier is 1, the symbol position of the DMRS is the first symbol position plus x, or the symbol start position of the DMRS is the first symbol start position plus x.

[0061] In the protocol, the terminal device determines the mapping of DMRS to physical resources based on higher-layer configuration parameters. The DMRS sequence is mapped to resource elements (RE)(k,l) using a formula. p,u The formula can be expressed as:

[0062]

[0063] in, This represents the ratio of PDSCH EPRE to DMRS EPRE, where p represents the antenna port, k represents the subcarrier index, k' represents the offset within the subcarrier group, n represents the index of each subcarrier, l represents the symbol position of the DMRS, l' represents the symbol start position of the DMRS, and l' indicates whether it is a single-symbol DMRS or a double-symbol DMRS. Subcarriers with DMRS configuration type 1 are grouped into groups of 4, and subcarriers with DMRS configuration type 2 are grouped into groups of 6.

[0064] In this application, when some subcarriers in the DMRS subcarrier are shifted by x symbols, the DMRS will split into multiple DMRS. Therefore, it is necessary to modify the definition in the formula for mapping DMRS sequences to resource elements in the protocol.

[0065] For example, a DMRS subcarrier with an even index can be shifted by x symbols. Specifically, when the offset k' within a subcarrier group is 0, it indicates that the subcarrier has an even index, and it needs to be shifted by x symbols from the current symbol. In other words, when the offset k' within a subcarrier group is 0, the subcarrier needs to be shifted to another symbol. Therefore, the symbol position l of the subcarrier needs to be increased by x from its original symbol position, or the symbol starting position of the subcarrier needs to be changed. Add x to the original symbol starting position. The original symbol position and the original symbol starting position are obtained by mapping according to the above protocol formula (1), that is, modify l in the protocol to: if k'=1, If k' = 0, This ensures that subcarriers with an offset k' of 0 within a subcarrier group and subcarriers with an offset k' of 1 within a subcarrier group are separated by x symbols. This is beneficial for utilizing the channel correlation at the subcarrier level to maintain sufficient smoothness in the frequency domain, enabling the artificial intelligence network to capture subtle disturbances in the time domain as much as possible, thereby improving filtering performance.

[0066] In this application, a subcarrier with an odd index in the DMRS subcarrier can also be shifted by x symbols. Specifically, when the offset k' within the subcarrier group of a subcarrier is 1, it indicates that the subcarrier has an odd index, and it needs to be shifted by x symbols from the current symbol. That is, when the offset k' within the subcarrier group of a subcarrier is 1, the subcarrier needs to be shifted to another symbol. Therefore, the symbol position l of the subcarrier needs to be increased by x based on the original symbol position, or the symbol starting position of the subcarrier needs to be changed. Add 'x' to the original symbol starting position, that is, modify 'l' in the protocol to: if k' = 0, If k' = 1, This ensures that subcarriers with an offset k' of 0 within a subcarrier group and subcarriers with an offset k' of 1 within a subcarrier group are separated by x symbols. This is beneficial for utilizing the channel correlation at the subcarrier level to maintain sufficient smoothness in the frequency domain, enabling the artificial intelligence network to capture subtle disturbances in the time domain as much as possible, thereby improving filtering performance.

[0067] Optionally, shifting the subcarrier subset of the DMRS in the frequency domain by x symbols includes: the symbol position of the even-numbered subcarriers being the first symbol position plus x, or the symbol start position of the even-numbered subcarriers being the first symbol start position plus x, wherein the even-numbered subcarriers are the subcarriers whose index is even after arranging the corresponding subcarriers of each antenna port of the DMRS; or, the symbol position of the odd-numbered subcarriers being the first symbol position plus x, or the symbol start position of the odd-numbered subcarriers being the first symbol start position plus x, wherein the odd-numbered subcarriers are the subcarriers whose index is odd after arranging the corresponding subcarriers of each antenna port of the DMRS.

[0068] If it is necessary to shift some subcarriers in the DMRS subcarrier by x symbols, then the definition of the formula for mapping the DMRS sequence to the resource element in the protocol needs to be modified.

[0069] For example, this application shifts the subcarriers with even-numbered indices after arranging the corresponding subcarriers of each antenna port in the DMRS by x symbols. This corresponds to the following in the formula: when the index of the subcarriers corresponding to antenna port p is even, i.e., when the subcarrier index k is even, the symbol position l of that subcarrier is increased by x from its original symbol position, or the symbol starting position of that subcarrier is increased by x from its original symbol position. In other words, l in the protocol is modified as follows: if kmod2 = 1, If kmod2 = 0,

[0070] For example, this application shifts the subcarriers with odd indices after arranging the corresponding subcarriers at each DMRS antenna port by x symbols. In the formula, this translates to: when the index of the subcarriers corresponding to antenna port p is odd (i.e., subcarrier index k is odd), the symbol position l of that subcarrier is increased by x from its original symbol position, or the symbol start position of that subcarrier is increased by x from its original symbol position. In other words, l in the protocol is modified as follows: if kmod2 = 0, If kmod2 = 1,

[0071] Optionally, the Physical Downlink Shared Channel (PDSCH) decoding time and / or Physical Uplink Shared Channel (PUSCH) preparation time are increased by t symbols, where t is a positive integer.

[0072] Specifically, when the time-domain resources (symbols) of DMRS are expanded, i.e., the DMRS subcarriers are shifted by x symbols in the time domain, this application increases the PDSCH decoding time N1 and / or PUSCH preparation time N2 by a factor of t, thereby enabling the terminal device to complete channel estimation and realize the decoding of the physical channel. For example, t is less than or equal to x, such that the increase in N1 and / or N2 is kept as small as possible, not exceeding the shifted or repeated x symbols.

[0073] Optionally, the DMRS is a front-loaded DMRS.

[0074] When only a front-loaded DMRS is configured, subtle disturbances in the time-domain (inter-symbol) channel are difficult to remove, which can affect the accuracy of channel estimation by the terminal device. Therefore, in order to capture subtle disturbances in the time-domain (inter-symbol) channel, network devices can modify a single front-loaded DMRS into multiple front-loaded DMRSs (multiple in the time domain) with a certain symbol interval when configuring DMRS, increasing the number of symbols in the DMRS. This allows the AI-based channel estimation algorithm to capture subtle disturbances in the time-domain (inter-symbol) channel, improving filtering performance.

[0075] As can be seen, the embodiments of this application propose a demodulation reference signal (DMRS) configuration method, which shifts some subcarriers of the front-loaded DMRS in the frequency domain to another symbol, enabling the channel estimation algorithm based on artificial intelligence to capture subtle disturbances in the channel in the time domain and improve filtering performance.

[0076] Please see Figure 4 , Figure 4 This is a schematic flowchart of another demodulation reference signal configuration method provided in an embodiment of this application, applied to, for example... Figure 1 The communication system shown. (As shown) Figure 4 As shown, the method includes the following steps.

[0077] S410. The terminal device determines the time-frequency domain resources of the DMRS, wherein the subcarriers of the DMRS are repeated at the xth symbol after the symbol position of the DMRS, where x is a positive integer.

[0078] In this application, the time-domain resources (symbols) of the DMRS can be extended by repeating the subcarriers of the DMRS on the xth symbol after the symbol position of the DMRS. This splits the DMRS into multiple DMRS, enabling the artificial intelligence network to capture subtle disturbances in the time domain as much as possible, thereby improving the filtering performance.

[0079] Optionally, the DMRS includes a first symbol start position and a second symbol start position, wherein the second symbol start position is the symbol start position of the DMRS on the x-th symbol, and the second symbol start position is the first symbol start position plus x; or, the DMRS includes a first symbol position and a second symbol position, wherein the second symbol position is the symbol start position of the DMRS on the x-th symbol, and the second symbol position is the first symbol position plus x.

[0080] When the subcarrier of the DMRS is repeated on the xth symbol after the symbol position of the DMRS, the DMRS will split into multiple DMRS (multiple in the time domain). Therefore, it is necessary to modify the definition of the formula for mapping the DMRS sequence to the resource element in the protocol.

[0081] Specifically, if the subcarriers of the DMRS are repeated on the x-th symbol after the symbol position of the DMRS, the DMRS is split into two DMRSs: the current DMRS and the DMRS repeated on the x-th symbol, configured according to the current protocol. Since the DMRS subcarriers are repeated on the x-th symbol, the DMRS repeated on the x-th symbol has the same subcarrier position as the current DMRS. Therefore, the DMRS includes a first symbol start position and a second symbol start position. The first symbol start position is the symbol start position of the current DMRS, and the second symbol start position is the symbol start position of the DMRS repeated on the x-th symbol, equal to the first symbol start position plus x. Alternatively, the DMRS may also include a first symbol position and a second symbol position, where the first symbol start position is the symbol position of the current DMRS, and the second symbol start position is the symbol position of the DMRS repeated on the x-th symbol, equal to the first symbol position plus x.

[0082] The first symbol position and the first symbol start position are obtained by mapping according to the above protocol formula (1). Therefore, when DMRS includes two symbol start positions or two symbol positions, the l in the protocol needs to be modified as follows:

[0083] Optionally, the DMRS subcarrier on the x-th symbol is downsampled by a factor of m, where m is a positive integer.

[0084] In this embodiment of the application, in order to reduce the resource overhead of DMRS, the repeated DMRS can be downsampled by m times in the frequency domain (subcarrier), so that the resource occupation of DMRS in the frequency domain is 1 / m of the original.

[0085] Optionally, the subcarriers of the DMRS on the x-th symbol are downsampled by a factor of m, including: retaining either the even-numbered or odd-numbered subcarriers of the DMRS on the x-th symbol.

[0086] Wherein, m can be 2, and the subcarrier of the DMRS on the xth symbol is downsampled by 2 times, so that the resource overhead of the DMRS can remain unchanged.

[0087] In this embodiment, for each antenna port of a repeating DMRS, only subcarriers with even or odd subcarrier indices are retained. This creates multiple downsampled DMRSs in the frequency domain, which is beneficial for maintaining sufficient smoothness in the frequency domain by utilizing subcarrier-level channel correlation.

[0088] Optionally, when the symbol start position of the DMRS on the xth symbol is not the first symbol start position, the subcarrier group offset of the DMRS on the xth symbol is 0 or 1.

[0089] In this case, after downsampling the subcarriers of the DMRS on the x-th symbol, the number of repeated DMRS on the x-th symbol will be different from the number of subcarriers of the current DMRS. Therefore, it is necessary to modify the definition of the formula for mapping DMRS sequences to resource elements in the protocol.

[0090] Specifically, this application may retain only the subcarriers whose intra-subcarrier offset k' of the DMRS subcarriers on the x-th symbol are all 0. This corresponds to the following in the formula: when the symbol start position of the DMRS is not the symbol start position indicated by the current protocol, that is, when the symbol position of the subcarrier... If the subcarrier offset within the subcarrier group is 0, it indicates that the subcarrier is an even-indexed subcarrier and needs to be retained.

[0091] For example, this application may also retain only the subcarriers with an intra-subcarrier offset k' of 1 for the DMRS subcarrier on the x-th symbol. This corresponds to the following in the formula: when the symbol start position of the DMRS is not the symbol start position indicated by the current protocol, i.e., when the symbol position of the subcarrier... If the subcarrier has an odd index, then the offset within the subcarrier group is 1, indicating that the subcarrier is an odd-indexed subcarrier and needs to be retained.

[0092] Optionally, when the value of the symbol start position of the DMRS on the xth symbol is not the value of the first symbol start position, the subcarrier of the DMRS on the xth symbol is an even subcarrier or an odd subcarrier.

[0093] Specifically, this application may retain only the even-numbered subcarriers of the DMRS on the x-th symbol, which corresponds to the following in the formula: when the symbol start position of the DMRS is not the symbol start position indicated by the current protocol, that is, when the symbol position of the subcarrier is... If the subcarrier is an even-numbered subcarrier, it means that the subcarrier with an even index needs to be retained.

[0094] For example, this application may also retain only the odd-numbered subcarriers of the DMRS on the x-th symbol, which corresponds to the following in the formula: when the symbol start position of the DMRS is not the symbol start position indicated by the current protocol, that is, when the symbol position of the subcarrier is... If the index is odd, then the subcarrier is an odd-numbered subcarrier, meaning that the subcarrier is an odd-numbered subcarrier and needs to be retained.

[0095] Optionally, the Physical Downlink Shared Channel (PDSCH) decoding time and / or Physical Uplink Shared Channel (PUSCH) preparation time are increased by t symbols, where t is a positive integer.

[0096] Specifically, when the time-domain resources (symbols) of the DMRS are expanded, i.e., the DMRS subcarrier is repeated on the xth symbol after the current symbol position, this application increases the PDSCH decoding time N1 and / or PUSCH preparation time N2 by a factor of t, thereby enabling the terminal device to complete channel estimation and realize the decoding of the physical channel. For example, t is less than or equal to x, such that the increase in N1 and / or N2 remains as small as possible, not exceeding x symbols of shifting or repetition.

[0097] Optionally, the DMRS is a front-loaded DMRS.

[0098] When only a front-loaded DMRS is configured, subtle disturbances in the time-domain (inter-symbol) channel are difficult to remove, which can affect the accuracy of channel estimation by the terminal device. Therefore, in order to capture subtle disturbances in the time-domain (inter-symbol) channel, network devices can modify a single front-loaded DMRS into multiple front-loaded DMRSs (multiple in the time domain) with a certain symbol interval when configuring DMRS, increasing the number of symbols in the DMRS. This allows the AI-based channel estimation algorithm to capture subtle disturbances in the time-domain (inter-symbol) channel, improving filtering performance.

[0099] As can be seen, the embodiments of this application propose a demodulation reference signal (DMRS) configuration method, which repeats the subcarrier of the DMRS on the xth symbol after the symbol position of the DMRS, so that the channel estimation algorithm based on artificial intelligence can capture the subtle disturbances of the channel in the time domain and improve the filtering performance.

[0100] Please see Figure 5 , Figure 5 This is a schematic flowchart of another demodulation reference signal configuration method provided in an embodiment of this application, applied to, for example... Figure 1 The communication system shown. (As shown) Figure 5 As shown, the method includes the following steps.

[0101] S510. The terminal device determines the time-frequency domain resources of the DMRS, wherein the DMRS includes a front-loaded DMRS and an additional demodulation reference signal, and the offset between the symbol position of the front-loaded DMRS and the symbol position of the additional demodulation reference signal is y, wherein y is a positive integer.

[0102] In the embodiments of this application, when the disturbance of the time domain (inter-symbol) channel is small, front-loaded DMRS and additional demodulation reference signal additional DMRS can be configured simultaneously to ensure the channel estimation quality.

[0103] Optionally, the symbol start position of the additional DMRS is indicated by a higher-level parameter.

[0104] Currently, the protocol obtains the symbol position of the additional DMRS by looking up a table using higher-layer parameters such as PDSCH mapping type, dmrs-AdditionalPosition, and the number of PDSCH symbols (or the end symbol position). However, AI-based channel estimation algorithms are not limited by the position of the demodulation reference signal (i.e., the position of the demodulation reference signal can be quite flexible). Therefore, this application directly indicates the offset between the symbol position of the front-loaded DMRS and the symbol position of the additional demodulation reference signal (additional DMRS) through higher-layer parameters. Specifically, it modifies the symbol start position of the additional DMRS. Instead of obtaining the information from a table, higher-level parameters are indicated, thus reducing signaling overhead.

[0105] Optionally, the symbol start position of the additional DMRS is a downlink control information (DCI) indication.

[0106] Currently, the protocol obtains the symbol position of the additional DMRS by looking up a table using higher-layer parameters such as PDSCH mapping type, dmrs-AdditionalPosition, and the number of PDSCH symbols (or the end symbol position). However, AI-based channel estimation algorithms are not limited by the position of the demodulation reference signal (i.e., the position of the demodulation reference signal can be quite flexible). Therefore, this application directly uses DCI to indicate the offset between the symbol position of the front-loaded DMRS and the symbol position of the additional demodulation reference signal, specifically by modifying the symbol start position of the additional DMRS. For DCI indication, dynamic signaling is used to achieve greater flexibility.

[0107] As can be seen, the embodiments of this application propose a demodulation reference signal configuration method. When the disturbance of the channel in the time domain (between symbols) is small, both the front-loaded DMRS and the additional demodulation reference signal additionalDMRS are configured, so that the channel estimation algorithm based on artificial intelligence can capture the subtle disturbance of the channel in the time domain and improve the filtering performance.

[0108] Please see Figure 6 , Figure 6 This is a schematic flowchart of another demodulation reference signal configuration method provided in an embodiment of this application, applied to, for example... Figure 1 The communication system shown. (As shown) Figure 6 As shown, the method includes the following steps.

[0109] S610. The terminal device determines the time-frequency domain resources of the DMRS, wherein the subcarriers of the DMRS are downsampled by a factor of m, where m is a positive integer.

[0110] In the embodiments of this application, when the disturbance of the time domain (inter-symbol) channel is small, in order to reduce the resource overhead of DMRS, the subcarriers of DMRS can be downsampled so that the resource occupation of DMRS in the frequency domain is 1 / m of the original.

[0111] Optionally, m = 2. The subcarriers of the DMRS are downsampled by a factor of 2, thereby keeping the resource overhead of the DMRS unchanged.

[0112] Optionally, the subcarriers of the DMRS are downsampled by a factor of m, including: retaining the even-numbered subcarrier set of the DMRS; or retaining the odd-numbered subcarrier set of the DMRS.

[0113] In this embodiment, for each antenna port of the DMRS, only subcarriers with even or odd subcarrier indices are retained. This creates multiple downsampled DMRSs in the frequency domain, which is beneficial for maintaining sufficient smoothness in the frequency domain by utilizing subcarrier-level channel correlation.

[0114] Optionally, the subcarrier offset within the subcarrier group of the DMRS is 1 or 0.

[0115] When the subcarriers of DMRS are downsampled, the number of DMRS subcarriers will change, so the definition of the formula for mapping DMRS sequences to resource elements in the protocol needs to be modified.

[0116] Specifically, this application may retain only the even-numbered subcarriers of the DMRS, which corresponds to the following in the formula: when the offset within the subcarrier group of the DMRS subcarrier is 0, it indicates that the subcarrier is an even-numbered subcarrier and needs to be retained.

[0117] For example, this application may also retain only the odd-numbered subcarriers of the DMRS, which corresponds to the following in the formula: when the offset within the subcarrier group of the DMRS subcarrier is 1, it indicates that the subcarrier is an odd-numbered subcarrier and needs to be retained.

[0118] Optionally, the subcarriers of the DMRS are even-numbered; or the subcarriers of the DMRS are configured to be odd-numbered.

[0119] Specifically, this application may retain only the even-numbered subcarriers of the DMRS. This corresponds to the formula as follows: if the index of the subcarrier of the DMRS is even, i.e., kmod2 = 0, then the subcarrier is an even-numbered subcarrier, indicating that the subcarrier is an even-numbered subcarrier and needs to be retained.

[0120] For example, this application may also retain only the odd-numbered subcarriers of the DMRS, which corresponds to the formula as follows: the indices of the subcarriers of the DMRS are all odd numbers, that is, kmod2 = 1, then the subcarrier is an odd-numbered subcarrier, indicating that the subcarrier is a subcarrier with an odd index and needs to be retained.

[0121] In the embodiments of this application, when the disturbance of the channel in the time domain (inter-symbol) is small, the subcarriers of the DMRS are downsampled, so that the channel estimation algorithm based on artificial intelligence can capture the subtle disturbance of the channel in the time domain, improve the filtering performance, and reduce the resource overhead of the DMRS.

[0122] In one possible example, the DMRS may include a front-loaded DMRS and an additional DMRS, wherein the subcarriers of the front-loaded DMRS and the additional DMRS are downsampled by a factor of m, where m is a positive integer.

[0123] In this embodiment, when the disturbance in the time domain (inter-symbol) channel is small, both the front-loaded DMRS and the additional demodulation reference signal (additional DMRS) can be configured simultaneously to ensure channel estimation quality. Furthermore, to reduce the resource overhead of the front-loaded DMRS and additional DMRS, the subcarriers of the front-loaded DMRS and additional DMRS can be downsampled, reducing their frequency domain resource usage to 1 / m of the original.

[0124] Optionally, m = 2. The subcarriers of the front-loaded DMRS and additional DMRS are downsampled by a factor of 2, thereby keeping the resource overhead of the DMRS unchanged.

[0125] Optionally, the subcarriers of the front-loaded DMRS and the additional DMRS are downsampled by a factor of m, including: retaining the even-numbered subcarrier set of the front-loaded DMRS and the additional DMRS; or retaining the odd-numbered subcarrier set of the front-loaded DMRS and the additional DMRS.

[0126] In this embodiment, for each antenna port of the front-loaded DMRS and the additional DMRS, only subcarriers with even-numbered subcarrier indices or odd-numbered subcarrier indices are retained. In this way, the front-loaded DMRS and the additional DMRS form multiple downsampled DMRSs in the frequency domain, which is beneficial for utilizing subcarrier-level channel correlation to maintain sufficient smoothness in the frequency domain.

[0127] Optionally, the subcarrier offsets of the front-loaded DMRS and the additional DMRS within the subcarrier group are 1 or 0.

[0128] In this case, after downsampling the subcarriers of the front-loaded DMRS and the additional DMRS, the number of subcarriers of the front-loaded DMRS and the additional DMRS will change. Therefore, it is necessary to modify the definition in the formula for mapping DMRS sequences to resource elements in the protocol.

[0129] Specifically, this application may retain only the even-numbered subcarriers of the front-loaded DMRS and the additional DMRS. In the formula, this is reflected as follows: when the subcarrier group offset of the subcarriers of the front-loaded DMRS and the additional DMRS is 0, it indicates that the subcarrier is an even-numbered subcarrier and needs to be retained.

[0130] For example, this application may also retain only the odd-numbered subcarriers of the front-loaded DMRS and the additional DMRS. In the formula, this is reflected as follows: when the subcarrier group offset of the subcarriers of the front-loaded DMRS and the additional DMRS is 1, it indicates that the subcarrier is an odd-numbered subcarrier and needs to be retained.

[0131] Optionally, the subcarriers of the front-loaded DMRS and the additional DMRS are even-numbered subcarriers; or the subcarriers of the front-loaded DMRS and the additional DMRS are configured as odd-numbered subcarriers.

[0132] Specifically, this application may retain only the even-numbered subcarriers of the front-loaded DMRS and additional DMRS. In the formula, this is reflected as follows: if the index of the subcarrier of the front-loaded DMRS and additional DMRS is even, that is, kmod2 = 0, then the subcarrier is an even-numbered subcarrier, which means that the subcarrier is an even-numbered subcarrier and needs to be retained.

[0133] For example, this application may also retain only the odd-numbered subcarriers of the front-loaded DMRS and additional DMRS. In the formula, this is reflected as follows: the indices of the subcarriers of the front-loaded DMRS and additional DMRS are both odd numbers, i.e., kmod2 = 1. Then the subcarrier is an odd-numbered subcarrier, which means that the subcarrier is an odd-numbered subcarrier and needs to be retained.

[0134] As can be seen, the embodiments of this application propose a demodulation reference signal configuration method. When the disturbance of the channel in the time domain (inter-symbol) is small, both the front-loaded DMRS and the additional demodulation reference signal (additional DMRS) are configured simultaneously. The subcarriers of the front-loaded DMRS and the additional demodulation reference signal (additional DMRS) are downsampled, so that the channel estimation algorithm based on artificial intelligence can capture the subtle disturbances of the channel in the time domain, improve the filtering performance, and reduce the resource overhead of the front-loaded DMRS and the additional DMRS.

[0135] The above primarily describes the solutions of the embodiments of this application from the perspective of the method execution process. It is understood that, in order to achieve the above functions, the network device includes corresponding hardware structures and / or software modules for executing each function. Those skilled in the art should readily recognize that, in conjunction with the units and algorithm steps of the various examples described in the embodiments provided herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0136] Please see Figure 7 , Figure 7 This is a functional unit block diagram of a demodulation reference signal configuration device 700 provided in an embodiment of this application. The device 700 is applied to a terminal device and includes: a processing unit 710, wherein...

[0137] Processing unit 710 is used to determine the time-frequency domain resources of demodulation reference signal DMRS.

[0138] Optionally, the DMRS shifts a subset of subcarriers in the frequency domain by x symbols, where x is a positive integer.

[0139] Optionally, the DMRS shifts a subset of subcarriers in the frequency domain by x symbols, including:

[0140] The set of even-numbered subcarriers in the corresponding subcarriers of each antenna port of the DMRS is shifted by the x symbols, and the set of even-numbered subcarriers is the set of subcarriers with even subcarrier indices; or, the set of odd-numbered subcarriers in the corresponding subcarriers of each antenna port of the DMRS is shifted by the x symbols, and the set of odd-numbered subcarriers is the set of subcarriers with odd subcarrier indices.

[0141] Optionally, shifting the subcarrier subset of DMRS in the frequency domain by x symbols includes:

[0142] When the offset within the subcarrier group of the DMRS subcarrier is 0, the symbol position of the DMRS is the first symbol position plus x, where the first symbol position is the symbol position configured by the network device based on a lookup table; or the symbol start position of the DMRS is the first symbol start position plus x, where the first symbol start position is the symbol start position configured by the network device based on a lookup table; or, when the offset within the subcarrier group of the DMRS subcarrier is 1, the symbol position of the DMRS is the first symbol position plus x, or the symbol start position of the DMRS is the first symbol start position plus x.

[0143] Optionally, shifting the subcarrier subset of DMRS in the frequency domain by x symbols includes:

[0144] The symbol position of the even-numbered subcarriers of the DMRS is the first symbol position plus x, or the symbol start position of the even-numbered subcarriers of the DMRS is the first symbol start position plus x, and the even-numbered subcarriers are subcarriers with an even index after arranging the corresponding subcarriers of each antenna port; or, the symbol position of the odd-numbered subcarriers of the DMRS is the first symbol position plus x, or the symbol start position of the odd-numbered subcarriers of the DMRS is the first symbol start position plus x, and the odd-numbered subcarriers are subcarriers with an odd index after arranging the corresponding subcarriers of each antenna port.

[0145] Optionally, the subcarriers of the DMRS are repeated on the xth symbol after the symbol position of the DMRS.

[0146] Optionally, the DMRS includes a first symbol start position and a second symbol start position, wherein the second symbol start position is the symbol start position of the DMRS on the x-th symbol, and the second symbol start position is the first symbol start position plus x; or, the DMRS includes a first symbol position and a second symbol position, wherein the second symbol position is the symbol start position of the DMRS on the x-th symbol, and the second symbol position is the first symbol position plus x.

[0147] Optionally, the DMRS subcarrier on the x-th symbol is downsampled by a factor of m, where m is a positive integer.

[0148] Optionally, the subcarrier of the DMRS on the x-th symbol is downsampled by a factor of m, including:

[0149] The even or odd subcarriers of the DMRS on the xth symbol are retained.

[0150] Optionally, when the symbol start position of the DMRS on the xth symbol is not the first symbol start position, the subcarrier group offset of the DMRS on the xth symbol is 0 or 1.

[0151] Optionally, when the value of the symbol start position of the DMRS on the xth symbol is not the value of the first symbol start position, the subcarrier of the DMRS on the xth symbol is an even subcarrier or an odd subcarrier.

[0152] Optionally, the Physical Downlink Shared Channel (PDSCH) decoding time and / or Physical Uplink Shared Channel (PUSCH) preparation time are increased by t symbols, where t is a positive integer.

[0153] Optionally, t is less than or equal to x.

[0154] Optionally, the DMRS is a front-loaded DMRS.

[0155] Optionally, the offset between the symbol position of the front-loaded DMRS and the symbol position of the additional demodulation reference signal (DMRS) is y, where y is a positive integer.

[0156] Optionally, the symbol start position of the additional DMRS is indicated by a higher-level parameter.

[0157] Optionally, the subcarriers of the front-loaded DMRS and the additional DMRS are downsampled by a factor of m, where m is a positive integer.

[0158] Optionally, m = 2.

[0159] Optionally, the subcarriers of the front-loaded DMRS and the additional DMRS are downsampled by a factor of m, including: retaining the even-numbered subcarrier set of the front-loaded DMRS and the additional DMRS, or retaining the odd-numbered subcarrier set of the front-loaded DMRS and the additional DMRS.

[0160] Optionally, the subcarrier offsets of the front-loaded DMRS and the additional DMRS within the subcarrier group are 1 or 0.

[0161] Optionally, the subcarriers of the front-loaded DMRS and the additional DMRS are configured as an even number of subcarriers; or the subcarriers of the front-loaded DMRS and the additional DMRS are configured as an odd number of subcarriers.

[0162] It should be understood that the device 700 here is embodied in the form of a functional unit. The term "unit" here can refer to an application-specific integrated circuit (ASIC), electronic circuitry, a processor (e.g., a shared processor, a proprietary processor, or a group processor, etc.) and memory for executing one or more software or firmware programs, integrated logic circuitry, and / or other suitable components supporting the described functions. In an alternative example, those skilled in the art will understand that the device 700 can specifically be the terminal device in the above embodiments. The device 700 can be used to execute the various processes and / or steps corresponding to the terminal device in the above method embodiments; to avoid repetition, these will not be described again here.

[0163] The apparatus 700 of each of the above solutions has the function of implementing the corresponding steps performed by the terminal device in the above methods; the function can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions; for example, the processing unit 710 can be replaced by a processor, which respectively executes the transmit and receive operations and related processing operations in each method embodiment.

[0164] In embodiments of this application, the device 700 may also be a chip or a chip system, such as a system-on-a-chip (SoC). Correspondingly, the detection unit may be the detection circuit of the chip, and is not limited thereto.

[0165] Please see Figure 8 , Figure 8 This is a schematic diagram of the structure of a terminal device provided in an embodiment of this application. The terminal device includes: one or more processors, one or more memories, one or more communication interfaces, and one or more programs; the one or more programs are stored in the memories and configured to be executed by the one or more processors.

[0166] The above procedure includes instructions for performing the following steps:

[0167] Determine the time-frequency domain resources of the demodulation reference signal DMRS.

[0168] All relevant content in each scenario involved in the above method embodiments can be referenced from the functional description of the corresponding functional module, and will not be repeated here.

[0169] It should be understood that the aforementioned memory may include read-only memory and random access memory, and provides instructions and data to the processor. A portion of the memory may also include non-volatile random access memory. For example, the memory may also store information about the device type.

[0170] In the embodiments of this application, the processor of the above-described device may be a Central Processing Unit (CPU), which may also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc.

[0171] It should be understood that "at least one" in the embodiments of this application refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0172] Furthermore, unless otherwise stated, the ordinal numbers such as "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects and are not used to limit the order, timing, priority, or importance of multiple objects. For example, "first information" and "second information" are only used to distinguish different information and do not indicate differences in the content, priority, sending order, or importance of these two types of information.

[0173] In implementation, each step of the above method can be completed by integrated logic circuits in the processor's hardware or by instructions in software. The steps of the method disclosed in the embodiments of this application can be directly manifested as execution by a hardware processor, or as a combination of hardware and software units within the processor. The software units can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory, and the processor executes the instructions in the memory, combining them with its hardware to complete the steps of the above method. To avoid repetition, detailed descriptions are omitted here.

[0174] This application also provides a computer storage medium storing a computer program for electronic data interchange, which causes a computer to perform some or all of the steps of any of the methods described in the above method embodiments.

[0175] This application also provides a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program operable to cause a computer to perform some or all of the steps of any of the methods described in the above method embodiments. This computer program product can be a software installation package.

[0176] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0177] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0178] In the several embodiments provided in this application, it should be understood that the disclosed apparatus can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical or other forms.

[0179] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of the embodiments of this application, depending on actual needs.

[0180] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0181] If the aforementioned integrated units are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage device (CMD). Based on this understanding, the technical solution of this application, in essence, 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. This computer software product is stored in a memory and includes several instructions to cause a computer device (which may be a personal computer, server, or TRP, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned memory includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0182] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage device, which may include a flash drive, ROM, RAM, disk, or optical disk, etc.

[0183] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for configuring a demodulation reference signal, characterized in that, The method includes: Determine the time-frequency domain resources of the demodulation reference signal DMRS; Wherein, the DMRS shifts the subcarrier subset in the frequency domain by x symbols, where x is a positive integer.

2. The method according to claim 1, characterized in that, The DMRS shifts the subcarrier subset in the frequency domain by x symbols, including: The set of even-numbered subcarriers in the corresponding subcarriers of each antenna port of the DMRS is shifted by x symbols, and the set of even-numbered subcarriers is the set of subcarriers with even subcarrier indices; Alternatively, the set of odd subcarriers in the corresponding subcarriers of each antenna port of the DMRS is shifted by the x symbols, and the set of odd subcarriers is the set of subcarriers with odd subcarrier indices.

3. The method according to claim 1, characterized in that, The DMRS shifts the subcarrier subset in the frequency domain by x symbols, including: When the offset within the subcarrier group of the DMRS subcarrier is 0, the symbol position of the DMRS is the first symbol position plus x, where the first symbol position is the symbol position configured by the network device based on a lookup table; or the symbol start position of the DMRS is the first symbol start position plus x, where the first symbol start position is the symbol start position configured by the network device based on a lookup table. Alternatively, when the subcarrier group offset of the DMRS subcarrier is 1, the symbol position of the DMRS is the first symbol position plus the x, or the symbol start position of the DMRS is the first symbol start position plus the x.

4. The method according to claim 1, characterized in that, The DMRS shifts the subcarrier subset in the frequency domain by x symbols, including: The symbol position of the even-numbered subcarriers of the DMRS is the first symbol position plus x, or the symbol start position of the even-numbered subcarriers of the DMRS is the first symbol start position plus x, and the even-numbered subcarriers are the subcarriers with an even index after arranging the corresponding subcarriers of each antenna port. Alternatively, the symbol position of the odd-numbered subcarriers of the DMRS is the first symbol position plus x, or the symbol start position of the odd-numbered subcarriers of the DMRS is the first symbol start position plus x, and the odd-numbered subcarriers are subcarriers with odd indexes after arranging the corresponding subcarriers of each antenna port.

5. The method according to any one of claims 1-4, characterized in that, The decoding time of the Physical Downlink Shared Channel (PDSCH) and / or the preparation time of the Physical Uplink Shared Channel (PUSCH) are increased by t symbols, where t is a positive integer.

6. The method according to claim 5, characterized in that, The t is less than or equal to the x.

7. The method according to any one of claims 1-4, characterized in that, The DMRS is a front-loaded DMRS.

8. A demodulation reference signal configuration apparatus, characterized in that, The device includes: The processing unit is used to determine the time-frequency domain resources of the demodulation reference signal DMRS; Wherein, the DMRS shifts the subcarrier subset in the frequency domain by x symbols, where x is a positive integer.

9. A terminal device, characterized in that, The terminal device includes a processor, a memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor. The programs include instructions for performing the steps of the method as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program for electronic data interchange, wherein the computer program causes a computer to perform the steps of the method as described in any one of claims 1-7.

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