Communication method, communication apparatus and storage medium

Abstract

The present application relates to the technical field of communications. Provided are a communication method, a communication apparatus and a storage medium, which aim to improve the accuracy of channel estimation results. The present application provides a communication method, comprising: determining a reference signal and target resource mapping information corresponding to the reference signal, wherein the target resource mapping information comprises a mapping type and mapping configuration information, and the mapping type comprises multi-interval equally-spaced mapping; and sending a target reference signal to a receiving device, wherein the target reference signal is obtained by means of performing resource mapping on the reference signal on the basis of the target resource mapping information. It can be seen that a sending device performs multi-interval equally-spaced mapping on a reference signal in a time domain and a frequency domain to obtain a target reference signal, such that a receiving device can use resolutions and representation ranges corresponding to an OTFS modulation technique under different intervals to reduce the adverse impacts caused by a fractional Doppler phenomenon or a fractional delay phenomenon of a channel in the OTFS modulation technique, thereby improving the accuracy of channel estimation results.

Description

A communication method, communication device and storage medium

[0001] This application claims priority to Chinese Patent Application No. 202411823861.X, filed on December 10, 2024, entitled "A Communication Method, Communication Device and Storage Medium", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communication technology, and in particular to a communication method, communication device and storage medium. Background Technology

[0003] Orthogonal Time-Frequency Space (OTFS) modulation is a technique used in wireless communication to improve and mitigate the severe Doppler effect and channel interference experienced by high-speed mobile communication systems. OTFS modulation maps data symbols to the Delay-Doppler (DD) domain and modulates them using the Symptotic Finite Fourier Transform (SFFT) and its inverse transform. OTFS modulation couples the time and frequency domains together, distributing symbols simultaneously across different times and frequencies, thus better adapting to complex wireless channel environments. Due to its significant advantages in addressing the Doppler effect, OTFS modulation has gradually become a research hotspot.

[0004] However, in current OFTS modulation techniques, if the channel exhibits fractional Doppler or fractional delay phenomena, it will cause dispersion on the resource grid in the delay-Doppler domain, affecting the sparsity of the channel in the delay-Doppler domain. This, in turn, leads to a decrease in the accuracy of the channel estimation results and affects the performance of the OFTS system. Summary of the Invention

[0005] This application provides a communication method, communication device, and storage medium, with the aim of improving the accuracy of channel estimation results.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A first aspect of this application provides a communication method applied to a transmitting device, the method comprising:

[0008] Determine a reference signal and the target resource mapping information corresponding to the reference signal. The target resource mapping information includes a mapping type and mapping configuration information. The mapping type includes multiple equally spaced mappings.

[0009] The target reference signal is sent to the receiving device, and the target reference signal is obtained by resource mapping based on the target resource mapping information.

[0010] In the above implementation scheme, when the transmitting device performs resource mapping on the reference signal, it can obtain the target reference signal by performing multiple equally spaced mappings of the reference signal in the time domain and frequency domain. This allows the receiving device to utilize the resolution and representation range corresponding to the OTFS modulation technology under different intervals, thereby reducing the adverse effects caused by the fractional Doppler phenomenon or fractional delay phenomenon in the channel of the OTFS modulation technology, and thus improving the accuracy of the channel estimation results.

[0011] In one possible implementation of the first aspect of this application, the target resource mapping information includes time-domain resource mapping information and frequency-domain resource mapping information. In the above implementation, corresponding resource mapping information can be configured for the frequency-domain and time-domain components of the reference signal, respectively. This allows the target reference signal to be obtained by performing multiple equally spaced mappings on the time-domain and frequency-domain components of the reference signal based on the target resource mapping information, using both the time-domain and frequency-domain resource mapping information. This enables the receiving device to utilize the resolution and representation range corresponding to OTFS modulation technology at different intervals, thereby reducing the adverse effects of fractional Doppler or fractional delay phenomena in the OTFS modulation technology and improving the accuracy of channel estimation results.

[0012] In one possible implementation of the first aspect of this application, the mapping configuration information includes at least one of the interval number, interval value, and subcarrier offset value among the plurality of intervals. In the above implementation, the mapping configuration information may carry at least one of the interval number, interval value, and subcarrier offset value, so that when mapping the reference signal, the target reference signal can be obtained by performing equal-interval mapping of the reference signal in the time and frequency domains based on the mapping configuration information. This allows the receiving device to utilize the resolution and representation range corresponding to the OTFS modulation technique under different intervals to reduce the adverse effects caused by the fractional Doppler phenomenon or fractional delay phenomenon in the channel of the OTFS modulation technique, thereby improving the accuracy of the channel estimation results.

[0013] In one possible implementation of the first aspect of this application, the interval value includes any one of the following: the value of each of the plurality of intervals; or, the value of the first interval and a first relative difference, wherein the first relative difference includes the difference between the values ​​of the other intervals in the plurality of intervals excluding the first interval and the value of the first interval; or, the value of the first interval, a second relative difference, and a third relative difference, wherein the second relative difference includes the difference between the values ​​of the other intervals in the plurality of intervals excluding the first interval and the number of time-domain symbols of the reference signal, and the third relative difference includes the difference between the values ​​of the other intervals in the plurality of intervals excluding the first interval and the number of subcarriers of the reference signal. In the above implementation scheme, the interval value in the mapping configuration information can be a specific value for each interval or a relative value for each interval. This allows the value of each interval to be determined when mapping the reference signal, enabling equal-interval mapping of the reference signal in the time and frequency domains to obtain the target reference signal. This allows the receiving device to utilize the resolution and representation range corresponding to the OTFS modulation technology under different intervals to reduce the adverse effects caused by the fractional Doppler phenomenon or fractional delay phenomenon in the channel of the OTFS modulation technology, thereby improving the accuracy of the channel estimation results.

[0014] In one possible implementation of the first aspect of this application, the subcarrier offset value includes any one of the following: a starting subcarrier offset value; or, a subcarrier offset value corresponding to each time-domain symbol in the reference signal; or, a relative subcarrier offset value between the starting subcarrier offset value and the other time-domain symbols in the reference signal excluding the first time-domain symbol, wherein the starting subcarrier offset value is the subcarrier offset value corresponding to the first time-domain symbol in the reference signal; or a subcarrier offset value corresponding to each time-domain symbol in the reference signal and the plurality of intervals. In the above implementation scheme, the subcarrier offset value in the mapping configuration information can be the starting subcarrier offset value, or the subcarrier offset value corresponding to each time-domain symbol in the reference signal, or the relative subcarrier offset value between the starting subcarrier offset value and other time-domain symbols in the reference signal except for the first time-domain symbol, or the subcarrier offset value corresponding to each time-domain symbol in the reference signal and different intervals in multiple intervals. This is so that when mapping the reference signal, the starting subcarrier position of each time-domain symbol in each interval can be determined, and the target reference signal can be obtained by equally spaced mapping of the reference signal in the time and frequency domains. This allows the receiving device to utilize the resolution and representation range corresponding to the OTFS modulation technology under different intervals to reduce the adverse effects caused by the fractional Doppler phenomenon or fractional delay phenomenon in the channel of the OTFS modulation technology, thereby improving the accuracy of the channel estimation results.

[0015] In one possible implementation of the first aspect of this application, sending the target reference signal to the receiving device includes: transforming the reference signal to obtain a time-frequency domain reference signal, wherein the time-frequency domain reference signal is a two-dimensional time-frequency domain reference signal; performing resource mapping on the time-frequency domain reference signal based on the target resource mapping information to obtain an initial target reference signal; modulating the initial target reference signal based on a first transformation to obtain the target reference signal; and sending the target reference signal to the receiving device. In the above implementation, the reference signal can be transformed first to obtain a time-frequency domain reference signal; then, the modulated time-frequency domain reference signal can be resource-mapped based on the target resource mapping information to obtain an initial target reference signal; finally, the initial target reference signal can be modulated into a target reference signal. This allows the resource-mapped target reference signal to be sent to the receiving device, enabling the receiving device to utilize the resolution and representation range corresponding to OTFS modulation technology at different intervals to reduce the adverse effects of fractional Doppler or fractional delay phenomena in the channel of OTFS modulation technology, thereby improving the accuracy of the channel estimation results.

[0016] In one possible implementation of the first aspect of this application, the step of performing resource mapping on the time-frequency domain reference signal based on the target resource mapping information to obtain an initial target reference signal includes: performing frequency domain mapping on the time-frequency domain reference signal based on the frequency domain resource mapping information to form a frequency domain reference signal pattern of the initial target reference signal, wherein the frequency domain reference signal pattern includes multiple frequency domain resource groups, and each of the multiple intervals corresponds to one frequency domain resource group; performing time domain mapping on the time-frequency domain reference signal based on the time domain resource mapping information to form a time domain reference signal pattern of the initial target reference signal, wherein the time domain reference signal pattern includes multiple time domain resource groups, and each of the multiple intervals corresponds to one time domain resource group, and the frequency domain reference signal pattern and the time domain reference signal pattern constitute a two-dimensional reference signal pattern of the initial target reference signal. In the above implementation scheme, the time-frequency domain reference signal can be subjected to multiple equally spaced time-domain mappings and frequency-domain mappings based on time-domain resource mapping information and frequency-domain resource mapping information, respectively, to obtain an initial target reference signal including time-domain reference signal pattern and frequency-domain reference signal pattern. That is, a two-dimensional reference signal pattern of the initial target reference signal is constructed, so that the receiving device can utilize the resolution and representation range corresponding to the OTFS modulation technology at different intervals to reduce the adverse effects caused by the fractional Doppler phenomenon or fractional delay phenomenon in the channel of the OTFS modulation technology, thereby improving the accuracy of the channel estimation results.

[0017] In one possible implementation of the first aspect of this application, the initial resource elements of the plurality of frequency domain resource groups are in the same position and carry the same signal; the initial resource elements of the plurality of time domain resource groups are in the same position and carry the same signal. In the above implementation, frequency domain resource groups corresponding to different intervals can share the same initial resource element, and the initial resource elements of different frequency domain resource groups can carry the same signal. Similarly, time domain resource groups corresponding to different intervals can share the same initial resource element, and the initial resource elements of different time domain resource groups can carry the same signal.

[0018] In one possible implementation of the first aspect of this application, transforming the reference signal to obtain a time-frequency domain reference signal includes: transforming the reference signal based on the inverse finite sine Fourier transform to obtain the time-frequency domain reference signal. In the above implementation, the reference signal can be transformed into a time-frequency domain reference signal based on the inverse finite sine Fourier transform, so that resource mapping can be performed on the modulated time-frequency domain reference signal based on target resource mapping information to obtain an initial target reference signal. Finally, the initial target reference signal is modulated into a target reference signal, so that the resource-mapped target reference signal can be sent to the receiving device. This allows the receiving device to utilize the resolution and representation range corresponding to OTFS modulation technology at different intervals to reduce the adverse effects caused by the fractional Doppler phenomenon or fractional delay phenomenon in the channel of OTFS modulation technology, thereby improving the accuracy of the channel estimation results.

[0019] In one possible implementation of the first aspect of this application, the first transformation includes an inverse fast Fourier transform or a Heisenberg transform. In the above implementation, the mapped initial target reference signal can be modulated into a target reference signal based on the inverse fast Fourier transform or the Heisenberg transform, so that the resource-mapped target reference signal can be sent to the receiving device. This allows the receiving device to utilize the resolution and representation range corresponding to OTFS modulation technology at different intervals to reduce the adverse effects of fractional Doppler or fractional delay phenomena in the channel of OTFS modulation technology, thereby improving the accuracy of the channel estimation results.

[0020] In one possible implementation of the first aspect of this application, if the transmitting device is a network device, the method further includes: sending reference signal configuration information to the receiving device, the reference signal configuration information including the target resource mapping information. In the above implementation, if the transmitting device is a network device, the transmitting device may also send reference signal configuration information carrying target resource mapping information to the receiving device in advance, or send reference signal configuration information carrying target resource mapping information to the receiving device after determining the target resource mapping information of the reference signal. This allows the receiving device to demodulate the target reference signal after receiving it, enabling the receiving device to utilize the resolution and representation range corresponding to OTFS modulation technology at different intervals to reduce the adverse effects caused by the fractional Doppler phenomenon or fractional delay phenomenon in the channel of OTFS modulation technology, thereby improving the accuracy of the channel estimation results.

[0021] In one possible implementation of the first aspect of this application, sending reference signal configuration information to the receiving device includes: sending reference signal configuration information to the receiving device based on a first signaling, wherein the first signaling includes any one of Radio Resource Control (RRC) signaling, Downlink Control Information (DCI) signaling, Non-Access Stratum (NAS) signaling, and Media Access Control (MAC) Control Element (CE) signaling. In the above implementation, the transmitting device may specifically send reference signal configuration information carrying target resource mapping information to the receiving device in advance based on RRC, DCI, NAS, or MAC CE signaling. This allows the receiving device to demodulate the target reference signal after receiving it, enabling it to utilize the resolution and representation range corresponding to OTFS modulation technology at different intervals to reduce the adverse effects of fractional Doppler or fractional delay phenomena in the OTFS modulation technology, thereby improving the accuracy of channel estimation results.

[0022] In one possible implementation of the first aspect of this application, the reference signal is carried in the delayed Doppler domain. Specifically, in the above implementation, the transmitting device can obtain the target reference signal by performing multiple equally spaced mappings on the reference signal carried in the delayed Doppler domain. This allows the receiving device to utilize the resolution and representation range corresponding to the OTFS modulation technique at different intervals, thereby reducing the adverse effects of the fractional Doppler phenomenon or fractional delay phenomenon in the channel of the OTFS modulation technique, and thus improving the accuracy of the channel estimation results.

[0023] A second aspect of this application provides a communication method applied to a receiving device, the method comprising:

[0024] A target reference signal is received from a transmitting device. The target reference signal is obtained by resource mapping the reference signal based on the target resource mapping information corresponding to the reference signal. The target resource mapping information includes mapping type and mapping configuration information. The mapping type includes multiple equally spaced mappings.

[0025] In the above implementation scheme, the receiving device can receive the target reference signal obtained by the transmitting device through multiple equally spaced mappings of the reference signal in the time and frequency domains. This allows the resolution and representation range corresponding to the OTFS modulation technique under different intervals to reduce the adverse effects caused by the fractional Doppler phenomenon or fractional delay phenomenon in the channel of the OTFS modulation technique, thereby improving the accuracy of the channel estimation results.

[0026] In one possible implementation of the second aspect of this application, the target resource mapping information includes time-domain resource mapping information and frequency-domain resource mapping information.

[0027] In one possible implementation of the second aspect of this application, the mapping configuration information includes at least one of the interval number, interval value, and subcarrier offset value among the plurality of intervals.

[0028] In one possible implementation of the second aspect of this application, the interval value includes any one of the following: the value of each of the plurality of intervals; or, the value of the first interval and a first relative difference, wherein the first relative difference includes the difference between the values ​​of the other intervals in the plurality of intervals excluding the first interval and the value of the first interval. Alternatively, the value of the first interval, a second relative difference, and a third relative difference, wherein the second relative difference includes the difference between the values ​​of the other intervals in the plurality of intervals excluding the first interval and the number of time-domain symbols of the reference signal, and the third relative difference includes the difference between the values ​​of the other intervals in the plurality of intervals excluding the first interval and the number of subcarriers of the reference signal.

[0029] In one possible implementation of the second aspect of this application, the subcarrier offset value includes any one of the following: a starting subcarrier offset value; or, a subcarrier offset value corresponding to each time-domain symbol in the reference signal; or, a relative subcarrier offset value between the starting subcarrier offset value and the other time-domain symbols in the reference signal excluding the first time-domain symbol, wherein the starting subcarrier offset value is the subcarrier offset value corresponding to the first time-domain symbol in the reference signal; or a subcarrier offset value corresponding to each time-domain symbol in the reference signal and the plurality of intervals.

[0030] In one possible implementation of the second aspect of this application, if the receiving device is a terminal device, the method further includes, before receiving the target reference signal from the transmitting device, receiving reference signal configuration information from the transmitting device, the reference signal configuration information including the target resource mapping information.

[0031] In one possible implementation of the second aspect of this application, receiving reference signal configuration information from the transmitting device includes: receiving reference signal configuration information from the transmitting device based on a first signaling, wherein the first signaling includes any one of Radio Resource Control (RRC) signaling, Downlink Control Information (DCI) signaling, Non-Access Stratum (NAS) signaling, and Media Access Control (MAC) Control Element (CE) signaling.

[0032] In one possible implementation of the second aspect of this application, the reference signal is carried in the delayed Doppler domain.

[0033] A third aspect of this application provides a communication device, specifically a transmitting device, comprising:

[0034] The determining module is used to determine a reference signal and target resource mapping information corresponding to the reference signal. The target resource mapping information includes mapping type and mapping configuration information. The mapping type includes multiple equally spaced mappings.

[0035] The transmitting module is used to transmit a target reference signal to a receiving device, wherein the target reference signal is obtained by resource mapping of the reference signal based on the target resource mapping information.

[0036] In the above implementation scheme, when the transmitting device performs resource mapping on the reference signal, it can obtain the target reference signal by performing multiple equally spaced mappings of the reference signal in the time domain and frequency domain. This allows the receiving device to utilize the resolution and representation range corresponding to the OTFS modulation technology under different intervals, thereby reducing the adverse effects caused by the fractional Doppler phenomenon or fractional delay phenomenon in the channel of the OTFS modulation technology, and thus improving the accuracy of the channel estimation results.

[0037] A fourth aspect of this application provides a communication device, specifically a terminal device, comprising:

[0038] A receiving module is used to receive a target reference signal from a transmitting device. The target reference signal is obtained by mapping the reference signal to a resource based on the target resource mapping information corresponding to the reference signal. The target resource mapping information includes mapping type and mapping configuration information. The mapping type includes multiple equally spaced mappings.

[0039] In the above implementation scheme, the receiving device can receive the target reference signal obtained by the transmitting device through multiple equally spaced mappings of the reference signal in the time and frequency domains. This allows the resolution and representation range corresponding to the OTFS modulation technique under different intervals to reduce the adverse effects caused by the fractional Doppler phenomenon or fractional delay phenomenon in the channel of the OTFS modulation technique, thereby improving the accuracy of the channel estimation results.

[0040] A fifth aspect of this application provides a communication device, comprising: a memory and at least one processor. The memory is used to store a program, and the at least one processor is used to execute the computer program or computer instructions stored in the memory, so that the communication device implements any of the communication methods provided in the first aspect of this application.

[0041] A sixth aspect of this application provides a communication device, comprising: a memory and at least one processor. The memory is used to store a program, and the at least one processor is used to execute the computer program or computer instructions stored in the memory, so that the communication device implements any of the communication methods provided in the second aspect of this application.

[0042] The seventh aspect of this application is a computer storage medium for storing a computer program, which, when executed, implements any one of the communication methods provided in the first or second aspect of this application.

[0043] The eighth aspect of this application provides a computer program product containing instructions that, when run on a computer, cause the computer to perform any of the communication methods described in the first or second aspect above.

[0044] A ninth aspect of this application provides a chip system including a processor for supporting a terminal device or network device in implementing the functions involved in the foregoing aspects, such as transmitting or processing data and / or information involved in the foregoing methods. In one possible design, the chip system further includes a memory for storing program instructions and data necessary for the terminal device or network device. The chip system may be composed of chips or may include chips and other discrete devices.

[0045] The tenth aspect of this application provides a communication system, including a transmitting device and a receiving device. The transmitting device is used to implement any of the communication methods provided in the first aspect of this application, and the receiving device is used to implement any of the communication methods provided in the second aspect of this application. Attached Figure Description

[0046] Figure 1 is a schematic diagram of the system architecture of the communication system provided in an embodiment of this application;

[0047] Figure 2 is a schematic diagram of the system model of OTFS provided in the embodiment of this application;

[0048] Figure 3 is a schematic diagram of the interaction process between the first type of transmitting device and receiving device provided in the embodiment of this application;

[0049] Figure 4 is a schematic diagram of the first type of resource mapping process provided in the embodiment of this application;

[0050] Figure 5 is a schematic diagram of the second type of resource mapping process provided in the embodiment of this application;

[0051] Figure 6 is a schematic diagram of the third type of resource mapping process provided in the embodiments of this application;

[0052] Figure 7 is a schematic diagram of the fourth type of resource mapping process provided in the embodiments of this application;

[0053] Figure 8 is a schematic diagram of the fifth type of resource mapping process provided in the embodiments of this application;

[0054] Figure 9 is a schematic diagram of the sixth type of resource mapping process provided in the embodiments of this application;

[0055] Figure 10 is a schematic diagram of the seventh type of resource mapping process provided in the embodiments of this application;

[0056] Figure 11 is a schematic diagram of the interaction process between a second type of transmitting device and a receiving device provided in an embodiment of this application;

[0057] Figure 12 is a schematic diagram of the interaction process between a third type of transmitting device and a receiving device provided in an embodiment of this application;

[0058] Figure 13 is a schematic diagram of the interaction process between the fourth type of transmitting device and receiving device provided in the embodiments of this application;

[0059] Figure 14 is a schematic diagram of the structure of the first communication device provided in the embodiment of this application;

[0060] Figure 15 is a schematic diagram of the structure of the second communication device provided in the embodiment of this application;

[0061] Figure 16 is a structural example diagram of an electronic device disclosed in an embodiment of this application;

[0062] Figure 17 is a structural example diagram of another electronic device disclosed in an embodiment of this application. Detailed Implementation

[0063] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The terminology used in the following embodiments is for the purpose of describing specific embodiments only and is not intended to be a limitation of this application. As used in the specification and appended claims of this application, the singular expressions "a," "an," "the," "the," "the," and "this" are intended to also include expressions such as "one or more," unless the context clearly indicates otherwise. It should also be understood that in the embodiments of this application, "one or more" refers to one, two, or more; "and / or" describes the relationship between related objects, indicating that three relationships may 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.

[0064] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0065] The "multiple" mentioned in the embodiments of this application refers to two or more. It should be noted that in the description of the embodiments of this application, terms such as "first" and "second" are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance, nor should they be construed as indicating or implying order.

[0066] The embodiments of this application are applied to communication systems, which can be second-generation (2G) communication systems, third-generation (3G) communication systems, LTE systems, fifth-generation (5G) communication systems, LTE and 5G hybrid architectures, 5G New Radio (5G NR) systems, and new communication systems that will emerge in the future development of communication.

[0067] A communication system includes transmitting equipment and receiving equipment. Transmitting equipment can be network-side devices used to provide network communication functions; in some cases, it is also called network equipment or network element. Network equipment can typically be a base station (including functional units of a base station, or a combination of functional units of a base station) or a core network unit. The core network unit can be a functional unit within the core network, including but not limited to Access and Mobility Management Function (AMF) units or Session Management Function (SMF) units. Transmitting equipment can also be devices accessing the network, typically terminal equipment. Correspondingly, receiving equipment can be either terminal equipment or network equipment. An example of a communication system is shown in Figure 1, which includes base station 11 and terminal 12.

[0068] In the embodiments provided in this application, the base station can be any device with wireless transceiver capabilities, including but not limited to: evolved base stations (NodeB, eNB, or e-NodeB) in Long Term Evolution (LTE), base stations (gNodeB or gNB) or transmission receiving points / transmission reception points (TRPs) in New Radio (NR), base stations in subsequent 3GPP evolutions, access nodes in Wi-Fi systems, wireless relay nodes, wireless backhaul nodes, etc. The base station can be: macro base station, micro base station, pico base station, small cell, relay station, or balloon station, etc. The base station can include one or more co-located or non-co-located Transmission Reception Points (TRPs). The base station can also be a radio controller, centralized unit (CU), and / or distributed unit (DU) in a cloud radio access network (CRAN) scenario. The base station can communicate with terminal devices or communicate with terminal devices through relay stations. Terminal devices can communicate with multiple base stations using different technologies. For example, a terminal device can communicate with a base station that supports LTE networks, or with a base station that supports 5G networks, or even have dual connections with both LTE and 5G base stations.

[0069] In the embodiments provided in this application, the terminal device can take various forms, such as a mobile phone, tablet computer, computer with wireless transceiver capabilities, virtual reality (VR) terminal device, augmented reality (AR) terminal device, wireless terminal device in industrial control, vehicle-mounted terminal device, wireless terminal device in self-driving, wireless terminal device in remote medical care, wireless terminal device in smart grid, wireless terminal device in transportation safety, wireless terminal device in smart city, wireless terminal device in smart home, wearable terminal device, etc. The terminal device may also be referred to as a terminal device, user equipment (UE), access terminal device, vehicle-mounted terminal device, industrial control terminal device, UE unit, UE station, mobile station, mobile station, remote station, remote terminal device, mobile device, UE terminal device, terminal device, wireless communication device, UE agent, or UE device, etc. The terminal device can also be a fixed terminal device or a mobile terminal device.

[0070] In communication systems, Orthogonal Time-Frequency Space (OTFS) modulation is a technique used in wireless communication to improve and mitigate the severe Doppler effect and channel interference experienced by high-speed mobile communication systems. OTFS modulation maps data symbols to the Delay-Doppler (DD) domain and modulates them using unitary transforms such as the Symplectic Finite Fourier Transform (SFFT). OTFS modulation couples the time and frequency domains together, distributing symbols simultaneously across different times and frequencies, thus better adapting to complex wireless channel environments. Due to its significant advantages in addressing the Doppler effect, OTFS modulation has gradually become a research hotspot.

[0071] OTFS is compatible with Orthogonal Frequency Division Multiplexing (OFDM) technology. The OTFS system model can be illustrated in Figure 2. When performing an M-point Inverse Fast Fourier Transform (IFFT) in the delay domain, the transmitting end can be equivalently represented by performing a one-dimensional N-point Fast Fourier Transform along the Doppler domain, and the execution order of the two is not restricted. Key parameters of the OTFS system may include... Corresponding system capabilities Duration T of a frame f =NT, where Δf is the subcarrier spacing, M represents the number of taps in the delay domain, corresponding to M subcarriers, and N represents the number of taps in the Doppler domain, corresponding to N time-domain symbols. If OTFS is used, it is equivalent to occupying M subcarriers in the frequency domain and N symbols in the time domain.

[0072] Assume the channel has integer multiples of delay and integer multiples of Doppler shift, and has P multipaths, with the delay and Doppler shift of the i-th path being τ. i v i The corresponding indices of the delayed Doppler domain resource grid are k i , l i The channel complex gain is g. i Then, the input-output relationship of the delayed Doppler domain after passing through the channel can be represented as a two-dimensional circular convolution.

[0073] If the channel exhibits fractional Doppler frequency shift or fractional delay, phase rotation will be introduced through approximation with several integer taps. The phase rotation becomes more severe as the tap index in the Doppler domain increases, significantly impacting higher-order modulation.

[0074] The fractional Doppler shift phenomenon in a channel refers to the difference between the frequency of the wave received by the receiver and the frequency of the wave emitted by the transmitter due to the relative motion between the transmitter and receiver during signal propagation. Furthermore, the Doppler shift of the channel is not an integer multiple of the Doppler domain resolution and does not leak into multiple taps of the Doppler domain, but rather presents as a fractional change, i.e., fractional Doppler shift.

[0075] The fractional delay phenomenon in a channel refers to the fact that when a signal is transmitted in a channel, due to various factors such as the physical characteristics of the channel itself, the differences in propagation paths, and the complexity of the propagation medium, the multipath delay of the channel is not an integer multiple of the delay domain resolution and leaks to multiple taps in the delay domain. Instead, it presents a fractional delay.

[0076] Therefore, in current OTFS modulation techniques, if the channel exhibits fractional Doppler or fractional delay phenomena, it will cause dispersion in the resource grid of the delay-Doppler domain, affecting the sparsity of the channel in the delay-Doppler domain and consequently reducing the accuracy of the channel estimation results. Furthermore, the presence of fractional delay and fractional Doppler estimation errors leads to phase rotation, which reduces the demodulation efficiency of higher-order modulation, severely impacting the performance of the OTFS system.

[0077] To make the technical solution of this application clearer and easier to understand, the communication method of the embodiments of this application is described below with reference to the accompanying drawings. The embodiments of this application are applicable to data transmission processes in wireless communication scenarios. In this embodiment, multimodal service transmission between a terminal device and a network device is taken as an example, such as multimodal service transmission between a single terminal device and a network device. The above-described data transmission between a terminal device and a network device is merely a feasible example. The embodiments of this application can be applied to data transmission between terminal devices, data transmission between network devices, or data transmission between two network elements in a wireless communication network.

[0078] Please refer to Figure 3, which shows a schematic diagram of the first interaction process between the transmitting device and the receiving device provided in an embodiment of this application. The communication method provided in this embodiment mainly includes the following steps:

[0079] 301. The transmitting device determines the reference signal and the target resource mapping information corresponding to the reference signal.

[0080] The target resource mapping information includes mapping type and mapping configuration information. The mapping type includes multiple equally spaced mappings.

[0081] In this embodiment, the transmitting device can first determine a reference signal to be sent to the receiving device and target resource mapping information corresponding to the reference signal. The reference signal can be a signal used for channel estimation, such as a pilot signal. It is understood that the transmitting device can pre-configure target resource mapping information, so that after determining the reference signal to be sent to the receiving device, the transmitting device can further determine the target resource mapping information corresponding to the reference signal. The target resource mapping information can be used to perform resource mapping on the reference signal. The target resource mapping information can include the mapping type and mapping configuration information of the reference signal. The mapping type of the reference signal can indicate the mapping method when performing resource mapping on the reference signal; specifically, the mapping type can be multiple equally spaced mappings. The mapping configuration information can indicate the specific parameters when performing resource mapping on the reference signal, so that when performing resource mapping on the reference signal, the transmitting device can obtain the target reference signal by performing multiple equally spaced mappings on the reference signal in the time and frequency domains. This allows the receiving device to utilize the resolution and representation range corresponding to OTFS modulation technology at different intervals to reduce the adverse effects caused by the fractional Doppler phenomenon or fractional delay phenomenon in the channel of OTFS modulation technology, thereby improving the accuracy of the channel estimation results.

[0082] It should be noted that a reference signal mapping type of equal-interval mapping with multiple intervals means that when performing resource mapping on the reference signal, the symbols in the reference signal can be mapped to the physical time-frequency domain multiple times, and each mapping corresponds to one interval, resulting in a reference signal pattern composed of resource groups corresponding to each of the multiple intervals, with equal intervals between consecutive symbols in each resource group. Furthermore, the reference signal mapping type can also be continuous mapping, meaning that when performing resource mapping on the reference signal, the symbols in the reference signal can be continuously mapped to the physical time-frequency domain. The reference signal mapping type can also be a combination of continuous mapping and equal-interval mapping with multiple intervals, or it can be considered a special case of equal-interval mapping with multiple intervals where one interval has a value of 1.

[0083] In one possible implementation of this application embodiment, the reference signal is carried in the delayed Doppler domain; that is, the reference signal can be a sequence of reference signals in the delayed Doppler domain. Specifically, in this application embodiment, the transmitting device can obtain the target reference signal by performing multiple equally spaced mappings on the reference signal carried in the delayed Doppler domain. This allows the receiving device to utilize the resolution and representation range corresponding to the OTFS modulation technique at different intervals, thereby reducing the adverse effects of the fractional Doppler phenomenon or fractional delay phenomenon in the channel of the OTFS modulation technique, and thus improving the accuracy of the channel estimation results.

[0084] In one possible implementation of this application embodiment, the target resource mapping information includes time-domain resource mapping information and frequency-domain resource mapping information. In this application embodiment, since the reference signal can be mapped in both the time and frequency domains when performing resource mapping, corresponding resource mapping information can be configured for the frequency and time components of the reference signal respectively. This allows the transmitting device to perform multiple equally spaced mappings of the time and frequency components of the reference signal based on the target resource mapping information to obtain the target reference signal. This enables the receiving device to utilize the resolution and representation range corresponding to OTFS modulation technology at different intervals, thereby reducing the adverse effects of fractional Doppler or fractional delay phenomena in the OTFS modulation technology and improving the accuracy of channel estimation results. It is understood that the time-domain resource mapping information and the frequency-domain resource mapping information can be the same or different, and this application embodiment does not limit this.

[0085] In one possible implementation of this application embodiment, the mapping configuration information includes at least one of the following: the number of intervals, the interval value, and the subcarrier offset value. In this application embodiment, the mapping configuration information in the target resource mapping information may carry at least one of the following: the number of intervals, the interval value, and the subcarrier offset value. The number of intervals refers to the number of possible intervals between different symbols in the reference signal when performing resource mapping on the reference signal. The interval value refers to the distance between different symbols in the reference signal when performing resource mapping on the reference signal. The subcarrier offset value refers to the offset value of the subcarrier in the reference signal when performing resource mapping on the reference signal. This allows the mapping configuration information to determine the specific position of each symbol in the reference signal in the frequency and time domains, enabling equal-interval mapping of the reference signal in the time and frequency domains to obtain the target reference signal. This allows the receiving device to utilize the resolution and representation range corresponding to OTFS modulation technology under different intervals to reduce the adverse effects of fractional Doppler or fractional delay phenomena in the channel of OTFS modulation technology, thereby improving the accuracy of channel estimation results.

[0086] Furthermore, it should be noted that the number of intervals, interval values, and subcarrier offset values ​​in the mapping configuration information can also be index values ​​of the actual values. That is, corresponding index tables can be pre-configured for the number of intervals, interval values, and subcarrier offset values. The mapping configuration information can carry at least one of the number of intervals, interval values, and subcarrier offset values. After determining the index values ​​of the number of intervals, interval values, and subcarrier offset values, the corresponding actual values ​​can be further determined based on the index values.

[0087] In one possible implementation of this application embodiment, the interval value includes any one of the following: the value of each interval in a plurality of intervals; or, the value of the first interval in a plurality of intervals and a first relative difference, the first relative difference including the difference between the values ​​of the other intervals in the plurality of intervals excluding the first interval and the value of the first interval; or, the value of the first interval in a plurality of intervals, a second relative difference and a third relative difference, the second relative difference including the difference between the values ​​of the other intervals in the plurality of intervals excluding the first interval and the number of time-domain symbols of the reference signal, and the third relative difference including the difference between the values ​​of the other intervals in the plurality of intervals excluding the first interval and the number of subcarriers of the reference signal.

[0088] In this embodiment, the interval values ​​of the mapping configuration information can have several forms. First, the interval values ​​of the mapping configuration information can be the values ​​of each of multiple intervals. For example, if the actual interval values ​​include a first interval, a second interval, and a third interval, and the value of the first interval is 1, the value of the second interval is 3, and the value of the third interval is 5, then the interval values ​​in the mapping configuration information can be 1, 3, and 5. Second, the interval values ​​of the mapping configuration information can be the value of the first interval among multiple intervals and a first relative difference, where the first relative difference includes the difference between the values ​​of the other intervals (excluding the first interval) and the value of the first interval. For example, if the actual interval values ​​include a first interval, a second interval, and a third interval, and the value of the first interval is 1, the value of the second interval is 3, and the value of the third interval is 5, then the interval values ​​in the mapping configuration information can be 1, second interval - first interval = 2, third interval - first interval = 4. The third type allows the interval values ​​in the mapping configuration information to be the value of the first interval, a second relative difference, and a third relative difference. The second relative difference includes the difference between the values ​​of the intervals other than the first interval and the number of time-domain symbols of the reference signal. The third relative difference includes the difference between the values ​​of the intervals other than the first interval and the number of subcarriers of the reference signal. For example, if the actual interval values ​​include a first interval, a second interval, and a third interval, and the first interval has a value of 1, the second interval has a value of 3, the third interval has a value of 5, the number of time-domain symbols N is 2, and the number of frequency-domain subcarriers M is 2, then the interval values ​​in the mapping configuration information can be divided into time-domain interval values ​​and frequency-domain interval values. The time-domain interval value can be 1, the second interval - N = 1, and the third interval - N = 3; the frequency-domain interval value can be 1, the second interval - M = 1, and the third interval - M = 3. It is understandable that the interval values ​​in the mapping configuration information can be specific values ​​for each interval or relative values ​​for each interval. This allows for the determination of the value of each interval among multiple intervals when mapping the reference signal. This enables the target reference signal to be obtained by equally spaced mapping of the reference signal across multiple intervals in both the time and frequency domains. This allows the receiving device to utilize the resolution and representation range corresponding to OTFS modulation technology under different intervals, reducing the adverse effects of fractional Doppler or fractional delay phenomena in the OTFS modulation technology, thereby improving the accuracy of channel estimation results. Furthermore, it should be noted that the representation of the interval values ​​in the mapping configuration information can be determined based on the mapping type of the reference signal.

[0089] In one possible implementation of this application embodiment, the subcarrier offset value includes a starting subcarrier offset value, or a subcarrier offset value corresponding to each symbol in the reference signal, or a relative subcarrier offset value between the starting subcarrier offset value and other time-domain symbols in the reference signal excluding the first time-domain symbol. The starting subcarrier offset value is the subcarrier offset value corresponding to the first time-domain symbol in the reference signal, or a subcarrier offset value corresponding to each symbol in the reference signal and multiple intervals. In this application embodiment, the subcarrier offset value of the mapping configuration information can have multiple forms. Firstly, the subcarrier offset value can be the starting subcarrier offset value, where the starting subcarrier offset value can be the subcarrier offset value corresponding to the first time-domain symbol in the reference signal. When the subcarrier offset value includes the starting subcarrier offset value, the subcarrier offset values ​​corresponding to other symbols in the reference signal can be further determined according to preset rules, where the content of the preset rules can be pre-configured according to actual conditions. For example, when the initial subcarrier offset value is 1, it can be determined that the subcarrier offset value of the first time-domain symbol in the reference signal is 1. It can also be further determined that the subcarrier offset values ​​of other time-domain symbols in the reference signal are also 1 according to a preset rule, or it can be further determined that the subcarrier offset values ​​of other time-domain symbols in the reference signal correspond to 2, 3, 4, 5... respectively according to a preset rule.

[0090] The second type allows the subcarrier offset value to be the subcarrier offset value corresponding to each time-domain symbol in the reference signal. In other words, each time-domain symbol in the reference signal can have a corresponding subcarrier offset value. For example, the subcarrier offset value can be 1, 2, 3, 4… where 1 can be the subcarrier offset value corresponding to the first time-domain symbol, 2 can be the subcarrier offset value corresponding to the second time-domain symbol, 3 can be the subcarrier offset value corresponding to the third time-domain symbol, and so on.

[0091] The third method involves subcarrier offset values ​​that can specifically include the initial subcarrier offset value and the relative subcarrier offset values ​​of the other time-domain symbols in the reference signal (excluding the first time-domain symbol). Then, the actual subcarrier offset values ​​of the other time-domain symbols in the reference signal (excluding the first time-domain symbol) can be determined based on the initial subcarrier offset value and the relative subcarrier offset values ​​of the other time-domain symbols in the reference signal. For example, the initial subcarrier offset value can be 1, the relative subcarrier offset value of the second time-domain symbol can be 2, and the relative subcarrier offset value of the third time-domain symbol can be 3. The preset conversion rule is: actual subcarrier offset value = initial subcarrier offset value + 5 * relative subcarrier offset value. Therefore, the subcarrier offset value of the second time-domain symbol can be determined to be 6, and the actual subcarrier offset value of the third time-domain symbol can be determined to be 11.

[0092] Fourthly, the subcarrier offset value can specifically be the subcarrier offset value corresponding to each symbol in the reference signal and to different intervals in multiple intervals. That is, each time-domain symbol under different intervals can have a corresponding subcarrier offset value. For example, the subcarrier offset value can be 1, 3, 5, 7... Wherein, 1 can be the subcarrier offset value corresponding to the first time-domain symbol under the first interval, 3 can be the subcarrier offset value corresponding to the first time-domain symbol under the second interval, 5 can be the subcarrier offset value corresponding to the first time-domain symbol under the third interval, and 7 can be the subcarrier offset value corresponding to the first time-domain symbol under the fourth interval. It is understandable that the subcarrier offset value in the mapping configuration information can be the starting subcarrier offset value, or the subcarrier offset value corresponding to each symbol in the reference signal, or the subcarrier offset value corresponding to each symbol in the reference signal and different intervals in multiple intervals. This is so that when mapping the reference signal, the starting subcarrier position of each time-domain symbol in each interval can be determined, and the target reference signal can be obtained by equally spaced mapping of the reference signal in the time and frequency domains. This allows the receiving device to utilize the resolution and representation range corresponding to the OTFS modulation technology under different intervals to reduce the adverse effects caused by the fractional Doppler phenomenon or fractional delay phenomenon in the channel of the OTFS modulation technology, thereby improving the accuracy of the channel estimation results.

[0093] 302. The transmitting device sends the target reference signal to the receiving device.

[0094] The target reference signal is obtained by resource mapping of the reference signal based on the target resource mapping information.

[0095] In this embodiment, after determining the reference signal and the corresponding target resource mapping information, the reference signal can be mapped to the physical time-frequency domain based on the target resource mapping information to obtain the target reference signal, which can then be sent to the receiving device. Specifically, the reference signal can be mapped to the physical time-frequency domain using multiple equally spaced intervals based on the target resource mapping information to obtain the target reference signal, which is then sent to the receiving device. This allows the receiving device to utilize the resolution and representation range corresponding to the OTFS modulation technique at different intervals to reduce the adverse effects caused by the fractional Doppler phenomenon or fractional delay phenomenon in the channel of the OTFS modulation technique, thereby improving the accuracy of the channel estimation results.

[0096] It is understandable that by performing equal-interval mapping on the reference signal based on the target resource mapping information, the resulting target reference signal can include multiple resource groups corresponding to the reference signal, and each resource group corresponds to one interval of multiple intervals. Each resource group carries each symbol in the reference signal, and the intervals between different symbols are equal.

[0097] In one possible implementation of this application embodiment, step 302, where the transmitting device sends the target reference signal to the receiving device, includes:

[0098] A1. The transmitting device transforms the reference signal to obtain a time-frequency domain reference signal.

[0099] In this embodiment of the application, after determining the reference signal, the transmitting device can first transform the reference signal to obtain a time-frequency domain reference signal, so that the reference signal can be mapped to the physical time-frequency domain to realize the resource mapping of the reference signal.

[0100] In one possible implementation of this application embodiment, step B1, where the transmitting device transforms the reference signal to obtain a time-frequency domain reference signal, includes:

[0101] A11. The transmitting device transforms the reference signal based on the inverse finite symplectic Fourier transform to obtain a time-frequency domain reference signal.

[0102] In this embodiment, the transmitting device can convert the reference signal into a time-frequency domain reference signal based on the Inverse Symplectic Finite Fourier Transform (ISFFT), so that resource mapping can be performed on the converted time-frequency domain reference signal based on the target resource mapping information. Specifically, the ISFFT is used to convert information from the delayed Doppler domain to the time-frequency domain. This process is part of the OTFS system signal processing flow, allowing the system to transmit information with higher efficiency and accuracy in environments with Doppler effects and multipath propagation.

[0103] A2. The transmitting device performs resource mapping on the time-frequency domain reference signal based on the target resource mapping information to obtain the initial target reference signal.

[0104] In this embodiment, after transforming the reference signal to obtain a time-frequency domain reference signal, the time-frequency domain reference signal can be mapped to the physical time-frequency domain based on the target resource mapping information to obtain an initial target reference signal. Specifically, the time-frequency domain reference signal can be mapped to the time domain and frequency domain respectively based on the mapping type and mapping configuration information in the target resource mapping information to obtain the time-domain reference signal pattern and frequency-domain reference signal pattern of the initial target reference signal. The time-domain reference signal pattern can be the pattern obtained after mapping the time-frequency domain reference signal to the time domain based on the target resource mapping information, and the frequency-domain reference signal pattern can be the pattern obtained after mapping the time-frequency domain reference signal to the frequency domain based on the target resource mapping information. Finally, the initial target reference signal is modulated into a target reference signal so that the resource-mapped target reference signal can be sent to the receiving device. This allows the receiving device to utilize the resolution and representation range corresponding to OTFS modulation technology at different intervals to reduce the adverse effects caused by the fractional Doppler phenomenon or fractional delay phenomenon in the channel of OTFS modulation technology, thereby improving the accuracy of the channel estimation results.

[0105] In one possible implementation of this application embodiment, step B2, the transmitting device performs resource mapping on the time-frequency domain reference signal based on the target resource mapping information to obtain the initial target reference signal, including:

[0106] A21. The transmitting device performs frequency domain mapping on the time-frequency domain reference signal based on the frequency domain resource mapping information to form the frequency domain reference signal pattern of the initial target reference signal.

[0107] The frequency domain reference signal pattern includes multiple frequency domain resource groups, with each interval corresponding to one frequency domain resource group.

[0108] In this embodiment, the transmitting device can perform equal-interval frequency domain mapping on the time-frequency domain reference signal based on the frequency domain resource mapping information in the target resource mapping information, to obtain a frequency domain reference signal pattern including multiple frequency domain resource groups. Each frequency domain resource group corresponds to one of the multiple intervals, and each frequency domain resource group includes all resource elements of the time-frequency domain reference signal.

[0109] In one possible implementation of this application's embodiments, the initial resource elements of multiple frequency domain resource groups are in the same position, and the signals carried by the initial resource elements of multiple frequency domain resource groups are the same. In some embodiments of this application, the initial resource elements of different frequency domain resource groups are in the same position, and the signals carried by the initial resource elements of different frequency domain resource groups are the same. The initial resource element of a frequency domain resource group can be the first resource element of the frequency domain resource group; that is, frequency domain resource groups corresponding to different intervals can share the same initial resource element, and the signals carried by the initial resource elements of different frequency domain resource groups can be the same.

[0110] Specifically, as shown in Figure 4, if the mapping type in the frequency domain resource mapping information is an equal-interval mapping with multiple intervals, and the number of intervals in the mapping configuration information in the frequency domain resource mapping information is 2, and the first interval (i.e., interval 1) has a value of 4, the second interval (i.e., interval 2) has a value of 5, and the subcarrier offset value is 0, then when mapping the first group of symbols RO-R4 in the time-frequency domain signal to the physical time-frequency domain, the frequency domain reference signal pattern in the obtained initial target reference signal can include two frequency domain resource groups. The first frequency domain resource group corresponds to the first interval and is obtained by frequency domain mapping RO-R4 with an interval value of 4, where the interval between R0 and R4 is 4. The second frequency domain resource group corresponds to the second interval and is obtained by frequency domain mapping RO-R4 with an interval value of 5, where the interval between R0 and R4 is 5. Furthermore, the initial resource element of different frequency domain resource groups is R0, that is, the initial resource elements of different frequency domain resource groups have the same position and carry the same signal.

[0111] As shown in Figure 5, if the mapping type in the frequency domain resource mapping information is a multi-interval equal-interval mapping, such as a combination of continuous mapping and multi-interval equal-interval mapping (i.e., a certain interval has a value of 1), and the number of intervals in the mapping configuration information of the frequency domain resource mapping information is 2, with the first interval (interval 1) having a value of 1, the second interval (interval 2) having a value of 5, and the subcarrier offset value being 0, then when mapping the first group of symbols RO-R4 in the time-frequency domain signal to the physical time-frequency domain, the resulting frequency domain reference signal pattern in the initial target reference signal can include two frequency domain resource groups. The first frequency domain resource group corresponds to the first interval and is obtained by frequency domain mapping RO-R4 with an interval value of 1, where the interval between R0-R4 is 1. The second frequency domain resource group corresponds to the second interval and is obtained by frequency domain mapping RO-R4 with an interval value of 5, where the interval between R0-R4 is 5. Furthermore, the initial resource element of different frequency domain resource groups is R0, meaning that the initial resource elements of different frequency domain resource groups are in the same position and carry the same signal.

[0112] A22. The transmitting device performs time-domain mapping on the time-frequency domain reference signal based on the time-domain resource mapping information to form the time-domain reference signal pattern of the initial target reference signal.

[0113] The time-domain reference signal pattern includes multiple time-domain resource groups, with each interval corresponding to one time-domain resource group. The frequency-domain reference signal pattern and the two-dimensional reference signal pattern constitute the two-dimensional reference signal pattern of the initial target reference signal.

[0114] In this embodiment, the transmitting device can perform equal-interval time-domain mapping on the time-frequency domain reference signal based on the time-domain resource mapping information in the target resource mapping information, to obtain a time-domain reference signal pattern including multiple time-domain resource groups. Each time-domain resource group corresponds to one of the multiple intervals, and each time-domain resource group includes all resource elements of the time-frequency domain reference signal. Furthermore, the initial resource elements of different time-domain resource groups have the same position, and the signals carried by the initial resource elements of different time-domain resource groups are the same. The initial resource element of a time-domain resource group can be the first column of resource elements in the time-domain resource group.

[0115] In one possible implementation of this application's embodiments, the initial resource elements of multiple time-domain resource groups are in the same position, and the initial resource elements of multiple time-domain resource groups carry the same signal. In some embodiments of this application, the initial resource elements of different time-domain resource groups are in the same position, and the initial resource elements of different time-domain resource groups carry the same signal. The initial resource element of a time-domain resource group can be the first column resource element of the time-domain resource group; that is, time-domain resource groups corresponding to different intervals can share the same initial resource element, and the initial resource elements of different time-domain resource groups can carry the same signal.

[0116] Specifically, as shown in Figure 6, if the mapping type in the time-domain resource mapping information is an equal-interval mapping with multiple intervals, and the number of intervals in the mapping configuration information in the time-domain resource mapping information is 2, and the value of the first interval (i.e., interval 1) is 4, the value of the second interval (i.e., interval 2) is 5, and the subcarrier offset value is 0, then when mapping each symbol RO-R14 in the time-frequency domain signal to the physical time-frequency domain, the time-domain reference signal pattern in the obtained initial target reference signal can include two time-domain resource groups. The first time-domain resource group corresponds to the first interval, which is obtained by time-domain mapping each virtual time-domain index with an interval value of 4. The interval between each time-domain symbol after mapping is 4, for example, the interval between R0 and R5 is 4, the interval between R1 and R6 is 4, the interval between R5 and R10 is 4, and the interval between R6 and R11 is 4. The second time-domain resource group corresponds to the second interval. It is obtained by mapping each virtual time-domain index with an interval value of 5. The interval between each time-domain symbol after mapping is 5. For example, the interval between R0 and R5 is 5, the interval between R1 and R6 is 5, the interval between R5 and R10 is 5, and the interval between R6 and R11 is 5. In addition, the initial resource elements of different time-domain resource groups are all in the columns where R0-R4 are located. That is, the initial resource elements of different time-domain resource groups have the same position and carry the same signal.

[0117] As shown in Figure 7, if the mapping type in the time-domain resource mapping information is an equal-interval mapping with multiple intervals, and the number of intervals in the mapping configuration information in the time-domain resource mapping information is 2, and the value of the first interval (i.e., interval 1) is 4, the value of the second interval (i.e., interval 2) is 5, and the subcarrier offset values ​​include the subcarrier offset values ​​corresponding to the first time-domain symbol, the second time-domain symbol, and the third time-domain symbol, which are 0, 1, and 2 respectively, then when mapping each symbol RO-R14 in the time-frequency domain signal to the physical time-frequency domain, the time-domain reference signal pattern in the obtained initial target reference signal can include two time-domain resource groups. The first time-domain resource group corresponds to the first interval. It is obtained by mapping each virtual time-domain index in a time-domain manner with an interval value of 4. The interval between each time-domain symbol after mapping is 4; for example, the interval between R0 and R5 is 4, the interval between R1 and R6 is 4, the interval between R5 and R10 is 4, and the interval between R6 and R11 is 4. Furthermore, the first column of time-domain resources has no subcarrier offset, the second column has a subcarrier offset value of 1, and the third column has a subcarrier offset value of 2. In addition, the initial resource elements of different time-domain resource groups are all in the columns containing R0-R4, meaning that the initial resource elements of different time-domain resource groups have the same position and carry the same signal.

[0118] As shown in Figure 8, if the mapping type in the time-domain resource mapping information is an equal-interval mapping of multiple intervals, such as a combination of continuous mapping and equal-interval mapping of multiple intervals, that is, the case where a certain interval has a value of 1 in the multiple intervals, and the number of intervals in the mapping configuration information in the time-domain resource mapping information is 2, and the value of the first interval, i.e., interval 1, is 1, and the value of the second interval, i.e., interval 2, is 6, the value of the second interval can be represented by a relative value in the mapping configuration information, for example, 6-N, and the subcarrier offset value is 0, then when mapping each symbol RO-R14 in the time-frequency domain signal to the physical time-frequency domain, the time-domain reference signal pattern in the obtained initial target reference signal can include two time-domain resource groups. The first time-domain resource group corresponds to the first interval. It is obtained by mapping each virtual time-domain index in a continuous mapping manner with an interval value of 1. The interval between each time-domain symbol after mapping is 1; for example, the interval between R0 and R5 is 1, the interval between R1 and R6 is 1, the interval between R5 and R10 is 1, and the interval between R6 and R11 is 1. The second time-domain resource group corresponds to the second interval. It is obtained by mapping each virtual time-domain index in a continuous mapping manner with an interval value of 6. The interval between each time-domain symbol after mapping is 6; for example, the interval between R0 and R5 is 6, the interval between R1 and R6 is 6, the interval between R5 and R10 is 6, and the interval between R6 and R11 is 6. Furthermore, the initial resource elements of different time-domain resource groups are all in the columns containing R0-R4, meaning that the initial resource elements of different time-domain resource groups have the same position and carry the same signal.

[0119] It is understood that the execution order of steps B21 and B22 above can be set according to the actual situation, and this application embodiment does not limit it here.

[0120] In this embodiment, after performing multiple equally spaced time-domain mappings and frequency-domain mappings on the time-frequency domain reference signal based on time-domain resource mapping information and frequency-domain resource mapping information respectively, to obtain the time-domain reference signal pattern and the frequency-domain reference signal pattern, any time-domain resource group and any frequency-domain resource group can be combined to form a two-dimensional resource group. That is, the time-domain reference signal and the frequency-domain reference signal can form a two-dimensional reference signal pattern of the initial target reference signal. The two-dimensional reference signal pattern can include multiple two-dimensional resource groups so that the receiving device can complete the channel estimation process by performing an inverse transformation on the two-dimensional reference signal pattern of the initial target reference signal.

[0121] As shown in Figure 9, if the mapping type in the frequency domain resource mapping information is an equal-interval mapping with multiple intervals, and the number of intervals in the mapping configuration information in the frequency domain resource mapping information is 2, with the first interval (interval 1) having a value of 4 and the second interval (interval 2) having a value of 5, and the mapping type in the time domain resource mapping information is an equal-interval mapping with multiple intervals, and the number of intervals in the mapping configuration information in the time domain resource mapping information is 2, with the third interval having a value of 4 and the fourth interval having a value of 5, and the subcarrier offset value is 0, then the mapped initial target reference signal can include two frequency domain resource groups and two time domain resource groups. The first frequency domain resource group corresponds to the first interval and is obtained by frequency domain mapping RO-R4 with an interval value of 4, where the interval between R0 and R4 is 4. The second frequency domain resource group corresponds to the second interval and is obtained by frequency domain mapping RO-R4 with an interval value of 5, where the interval between R0 and R4 is 5. Furthermore, the initial resource element of different frequency domain resource groups is R0, meaning that the initial resource elements of different frequency domain resource groups have the same position and carry the same signal. The first time-domain resource group corresponds to the third interval. It is obtained by mapping each virtual time-domain index with an interval value of 4. The interval between each mapped time-domain symbol is 4; for example, the interval between R0 and R5 is 4, the interval between R1 and R6 is 4, the interval between R5 and R10 is 4, and the interval between R6 and R11 is 4. The second time-domain resource group corresponds to the fourth interval. It is obtained by mapping each virtual time-domain index with an interval value of 5. The interval between each mapped time-domain symbol is 5; for example, the interval between R0 and R5 is 5, the interval between R1 and R6 is 5, the interval between R5 and R10 is 5, and the interval between R6 and R11 is 5. Furthermore, the initial resource elements of different time-domain resource groups are all in the columns containing R0-R4, meaning that the initial resource elements of different time-domain resource groups have the same position and carry the same signal.

[0122] As shown in Figure 10, if the mapping type in the frequency domain resource mapping information is an equal-interval mapping with multiple intervals, and the number of intervals in the mapping configuration information in the frequency domain resource mapping information is 2, with the first interval (interval 1) having a value of 4 and the second interval (interval 2) having a value of 5, and the mapping type in the time domain resource mapping information is an equal-interval mapping with multiple intervals, and the number of intervals in the mapping configuration information in the time domain resource mapping information is 2, with the third interval having a value of 4 and the fourth interval having a value of 5, and the subcarrier offset values ​​include the subcarrier offset values ​​corresponding to the first time domain symbol, the second time domain symbol, and the third time domain symbol, which are 0, 1, and 2 respectively, then the mapped initial target reference signal can include two frequency domain resource groups and two time domain resource groups. The first frequency domain resource group corresponds to the first interval and is obtained by frequency domain mapping RO-R4 with an interval value of 4, where the interval between R0 and R4 is 4. The second frequency domain resource group corresponds to the second interval and is obtained by frequency domain mapping RO-R4 with an interval value of 5, where the interval between R0 and R4 is 5. Furthermore, the initial resource element of different frequency domain resource groups is R0, meaning that the initial resource elements of different frequency domain resource groups are in the same position and carry the same signal. The first time domain resource group corresponds to the third interval and is obtained by mapping each virtual time domain index with an interval value of 4. The interval between each time domain symbol after mapping is 4, for example, the interval between R0 and R5 is 4, the interval between R1 and R6 is 4, the interval between R5 and R10 is 4, and the interval between R6 and R11 is 4. The second time domain resource group corresponds to the fourth interval and is obtained by mapping each virtual time domain index with an interval value of 5. The interval between each time domain symbol after mapping is 5, for example, the interval between R0 and R5 is 5, the interval between R1 and R6 is 5, the interval between R5 and R10 is 5, and the interval between R6 and R11 is 5. Also, the first column of time domain resources has no subcarrier offset, the second column of time domain resources has a subcarrier offset value of 1, and the third column of time domain resources has a subcarrier offset value of 2. Furthermore, the initial resource elements of different time-domain resource groups are all located in the columns R0-R4, meaning that the initial resource elements of different time-domain resource groups are in the same position and carry the same signal.

[0123] A3. The transmitting device modulates the initial target reference signal based on the first transformation to obtain the target reference signal.

[0124] In this embodiment of the application, in order to facilitate the transmission of the mapped initial target reference signal to the receiving device, the initial target reference signal can be modulated based on the first transformation to obtain the target reference signal, and then the target reference signal can be transmitted to the receiving device. This allows the receiving device to utilize the resolution and representation range corresponding to the OTFS modulation technology under different intervals to reduce the adverse effects caused by the fractional Doppler phenomenon or fractional delay phenomenon in the channel of the OTFS modulation technology, thereby improving the accuracy of the channel estimation results.

[0125] In one possible implementation of this application embodiment, the first transformation includes either the Inverse Fast Fourier Transform (IFFT) or the Heisenberg Transform. In this embodiment, the mapped initial target reference signal can be modulated into a target reference signal based on the Inverse Fast Fourier Transform (IFFT) or the Heisenberg Transform. This allows the resource-mapped target reference signal to be sent to the receiving device, enabling the receiving device to utilize the resolution and representation range corresponding to different intervals of the OTFS modulation technique. This reduces the adverse effects of the fractional Doppler effect or fractional delay in the channel of the OTFS modulation technique, thereby improving the accuracy of the channel estimation results. The Inverse Fast Fourier Transform can convert a discrete frequency domain signal back to its original time domain representation. The Heisenberg Transform is a mathematical operation that converts a signal from the time-frequency domain to the time domain.

[0126] A4. The transmitting device sends the target reference signal to the receiving device.

[0127] In this embodiment, after the transmitting device obtains the target reference signal by performing resource mapping on the reference signal based on the target resource mapping information, it can send the target reference signal to the receiving device so that the receiving device can demodulate the target reference signal and perform channel estimation. This allows the receiving device to utilize the resolution and representation range corresponding to the OTFS modulation technology under different intervals to reduce the adverse effects caused by the fractional Doppler phenomenon or fractional delay phenomenon in the channel of the OTFS modulation technology, thereby improving the accuracy of the channel estimation results.

[0128] 303. The receiving device receives the target reference signal from the transmitting device.

[0129] In this embodiment, the receiving device can receive a target reference signal and demodulate it based on pre-configured target resource mapping information to obtain a demodulated signal. This demodulated signal facilitates channel estimation based on the demodulated signal. It is understood that since the target reference signal is obtained by equally spaced mapping of a reference signal across multiple intervals, when the receiving device acquires and demodulates the target reference signal, and finally performs channel estimation based on the demodulated signal, it can utilize the resolution and representation range corresponding to OTFS modulation technology at different intervals to reduce the adverse effects of fractional Doppler or fractional delay phenomena in the OTFS modulation technology, thereby improving the accuracy of the channel estimation result.

[0130] Specifically, after receiving the target reference signal from the transmitting device, the receiving device can extract N time-domain symbols in the time domain at multiple intervals based on the target resource configuration information, obtaining N symbol sets corresponding to different intervals. Then, a Fast Fourier Transform (FFT) or Wegner transform is performed on each time-domain symbol corresponding to different intervals to obtain the time-frequency domain signal. Then, M reference signal symbols can be extracted in the frequency domain at a certain interval among multiple intervals, and this process is repeated multiple times until M*N symbol sets, i.e., two-dimensional resource groups, corresponding to multiple different time-frequency domains and multiple different intervals are obtained. Then, an M*N-point Symptotic Finite Fourier Transform (SFFT) can be performed on the M*N symbol sets to obtain the reference signal carried in the delayed Doppler domain. Finally, the channel can be estimated using a channel estimation algorithm to obtain the channel estimation result.

[0131] As illustrated by the examples in the foregoing embodiments, when the transmitting device performs resource mapping on the reference signal, it can obtain the target reference signal by performing multiple equally spaced mappings of the reference signal in the time and frequency domains. This allows the receiving device to utilize the resolution and representation range corresponding to the OTFS modulation technique under different intervals, thereby reducing the adverse effects caused by the fractional Doppler phenomenon or fractional delay phenomenon in the channel of the OTFS modulation technique, and thus improving the accuracy of the channel estimation results.

[0132] Please refer to Figure 11. Figure 11 shows a schematic diagram of a second interaction process between a transmitting device and a receiving device provided in an embodiment of this application. Another communication method provided in an embodiment of this application mainly includes the following steps:

[0133] 1101. The transmitting device sends reference signal configuration information to the receiving device.

[0134] The reference signal configuration information includes target resource mapping information.

[0135] In this embodiment of the application, if the transmitting device is a network device, the transmitting device can also pre-configure the target resource mapping information of the reference signal and send the reference signal configuration information carrying the target resource mapping information to the receiving device, so that the receiving device can demodulate the target reference signal after receiving it. This allows the receiving device to utilize the resolution and representation range corresponding to the OTFS modulation technology under different intervals to reduce the adverse effects caused by the fractional Doppler phenomenon or fractional delay phenomenon in the channel of the OTFS modulation technology, thereby improving the accuracy of the channel estimation results.

[0136] In one possible implementation of this application embodiment, step 1101, in which the transmitting device sends reference signal configuration information to the receiving device, includes:

[0137] B1. The transmitting device sends reference signal configuration information to the receiving device based on the first signaling.

[0138] The first signaling includes any one of Radio Resource Control (RRC) signaling, Downlink Control Information (DCI) signaling, Non-Access Stratum (NAS) signaling, and Media Access Control (MAC) Control Element (CE) signaling.

[0139] In this embodiment, the transmitting device may pre-send reference signal configuration information carrying target resource mapping information to the receiving device based on RRC signaling, DCI signaling, NAS signaling, or MAC CE signaling. This allows the receiving device to demodulate the target reference signal after receiving it, enabling it to utilize the resolution and representation range corresponding to OTFS modulation technology at different intervals. This reduces the adverse effects of fractional Doppler or fractional delay phenomena in the channel of OTFS modulation technology, thereby improving the accuracy of channel estimation results.

[0140] Radio Resource Control (RRC) signaling is an important protocol in mobile communication systems used to control and manage radio resources, primarily handling signaling interactions between terminal devices and network devices. Downlink Control Information (DCI) signaling, carried by the downlink physical control channel, is downlink control information sent from network devices to terminal devices. DCI signaling plays a crucial role in communication, containing various key information to guide terminal devices on how to correctly receive and transmit data. Non-Access Stratum (NAS) signaling is higher-layer signaling, responsible for handling signaling and control processes independent of radio access technologies. NAS signaling resides at a higher level in the protocol stack, operating at a higher layer than the access layer, and is essential for the establishment, management, and release of connections between user equipment and the core network. Medium Access Control (MTC) control element signaling is a type of signaling exchanged between network devices and terminal devices via the MTC layer. MAC CE signaling is carried on the physical downlink shared channel and is directly mapped to physical resources on the physical uplink shared channel or physical downlink shared channel in the form of protocol data units to implement various control resources.

[0141] In addition, after sending the reference signal configuration information to the receiving device, the transmitting device can also activate and deactivate the reference signal configuration information through Medium Access Control Element (MEC) signaling.

[0142] 1102. The receiving device receives reference signal configuration information from the transmitting device.

[0143] The reference signal configuration information includes target resource mapping information.

[0144] In this embodiment of the application, if the receiving device is a terminal device, the receiving device can also receive reference signal configuration information carrying target resource mapping information from the transmitting device in advance, so that after receiving the target reference signal, the receiving device can demodulate the target reference signal, so that the receiving device can use the resolution and representation range corresponding to the OTFS modulation technology under different intervals to reduce the adverse effects caused by the fractional Doppler phenomenon or fractional delay phenomenon in the channel of the OTFS modulation technology, thereby improving the accuracy of the channel estimation result.

[0145] In one possible implementation of this application embodiment, step 1102, where the receiving device receives reference signal configuration information from the transmitting device, includes:

[0146] C1. The receiving device receives reference signal configuration information from the transmitting device based on the first signaling.

[0147] In this embodiment, the receiving device can specifically receive the reference signal configuration information carrying target resource mapping information sent by the transmitting device based on RRC signaling, DCI signaling, NAS signaling, or MAC CE signaling. This allows the receiving device to demodulate the target reference signal after receiving it, enabling it to utilize the resolution and representation range corresponding to OTFS modulation technology at different intervals. This reduces the adverse effects of fractional Doppler or fractional delay phenomena in the channel of OTFS modulation technology, thereby improving the accuracy of channel estimation results.

[0148] 1103. The transmitting device determines the reference signal and the target resource mapping information corresponding to the reference signal.

[0149] The specific content of step 103 above is similar to that of step 301 in the aforementioned embodiment, and will not be repeated here.

[0150] 1104. The transmitting device sends the first reference signal configuration instruction information to the receiving device.

[0151] The first reference signal configuration indication information is used to indicate the activation of the target resource mapping information.

[0152] In this embodiment, after sending reference signal configuration information carrying target resource mapping information to the receiving device, and determining the reference signal and its corresponding target resource mapping information, the transmitting device can further instruct the target resource mapping information to be activated by sending a first reference signal configuration indication to the receiving device. This allows the receiving device to demodulate the target reference signal based on the target resource mapping information after receiving it. This enables the receiving device to utilize the resolution and representation range corresponding to OTFS modulation technology at different intervals to reduce the adverse effects of fractional Doppler or fractional delay phenomena in the channel of OTFS modulation technology, thereby improving the accuracy of channel estimation results. Specifically, the transmitting device can also send the first reference signal configuration indication information to the receiving device via MAC CE signaling.

[0153] 1105. The transmitting device performs resource mapping on the reference signal based on the target resource mapping information to obtain the target reference signal.

[0154] 1106. The transmitting device sends the target reference signal to the receiving device.

[0155] 1107. The receiving device receives the target reference signal from the transmitting device.

[0156] The specific content of steps 1105-1107 above is similar to that of steps 302-304 in the aforementioned embodiments, and will not be repeated here.

[0157] 1108. The transmitting device sends a second reference signal configuration instruction information to the receiving device.

[0158] The second reference signal configuration indication information is used to instruct the target resource mapping information to be deactivated.

[0159] In this embodiment, after the receiving device completes channel estimation based on the target reference signal, the transmitting device can send a second reference signal configuration indication information to the receiving device to instruct the target resource mapping information to be deactivated. This allows the receiving device to smoothly start a new channel estimation process when needed, without being affected by the previous channel estimation process. Specifically, the transmitting device can also send the second reference signal configuration indication information to the receiving device via MAC CE signaling.

[0160] As illustrated by the examples in the foregoing embodiments, when the transmitting device is a network device, the transmitting device can pre-configure the target resource mapping information corresponding to the reference signal and send it to the receiving device. Furthermore, when performing resource mapping on the reference signal, the transmitting device can obtain the target reference signal by performing multiple equally spaced mappings on the reference signal in the time and frequency domains. This allows the receiving device to utilize the resolution and representation range corresponding to the OTFS modulation technology under different intervals, thereby reducing the adverse effects caused by the fractional Doppler phenomenon or fractional delay phenomenon in the channel of the OTFS modulation technology, and thus improving the accuracy of the channel estimation results.

[0161] Please refer to Figure 12, which shows a third interaction flow diagram between the transmitting device and the receiving device provided in an embodiment of this application. Another communication method provided in an embodiment of this application mainly includes the following steps:

[0162] 1201. The transmitting device determines the reference signal and the target resource mapping information corresponding to the reference signal.

[0163] The specific content of step 1201 above is similar to that of step 301 in the aforementioned embodiment, and will not be repeated here.

[0164] 1202. The transmitting device sends reference signal configuration information to the receiving device.

[0165] The reference signal configuration information includes target resource mapping information.

[0166] In this embodiment of the application, if the transmitting device is a network device, after determining the target resource configuration information corresponding to the reference signal, the transmitting device can also send reference signal configuration information carrying target resource mapping information to the receiving device. This allows the receiving device to demodulate the target reference signal after receiving it, enabling the receiving device to utilize the resolution and representation range corresponding to OTFS modulation technology at different intervals to reduce the adverse effects caused by the fractional Doppler phenomenon or fractional delay phenomenon in the channel of OTFS modulation technology, thereby improving the accuracy of the channel estimation results.

[0167] In one possible implementation of this application embodiment, step 1202, in which the transmitting device sends reference signal configuration information to the receiving device, includes:

[0168] D1. The transmitting device sends reference signal configuration information to the receiving device based on Radio Resource Control (RRC) signaling, Downlink Control Information (DCI) signaling, or Non-Access Stratum (NAS) signaling.

[0169] In this embodiment, the transmitting device can send reference signal configuration information carrying target resource mapping information to the receiving device based on RRC signaling, DCI signaling, or NAS signaling. This allows the receiving device to demodulate the target reference signal after receiving it, enabling it to utilize the resolution and representation range corresponding to OTFS modulation technology at different intervals. This reduces the adverse effects of fractional Doppler or fractional delay phenomena in the channel of OTFS modulation technology, thereby improving the accuracy of channel estimation results.

[0170] 1203. The receiving device receives reference signal configuration information from the transmitting device.

[0171] The reference signal configuration information includes target resource mapping information.

[0172] In this embodiment of the application, if the receiving device is a terminal device, the receiving device can also receive reference signal configuration information carrying target resource mapping information sent by the transmitting device, so that after receiving the target reference signal, the receiving device can demodulate the target reference signal, so that the receiving device can use the resolution and representation range corresponding to the OTFS modulation technology under different intervals to reduce the adverse effects caused by the fractional Doppler phenomenon or fractional delay phenomenon in the channel of the OTFS modulation technology, thereby improving the accuracy of the channel estimation result.

[0173] In one possible implementation of this application embodiment, step 1203, the receiving device receives reference signal configuration information from the transmitting device, including:

[0174] E1. The receiving device receives reference signal configuration information from the transmitting device based on Radio Resource Control (RRC) signaling, Downlink Control Information (DCI) signaling, or Non-Access Stratum (NAS) signaling.

[0175] In this embodiment, the receiving device can specifically receive the reference signal configuration information carrying target resource mapping information sent by the transmitting device based on RRC signaling, DCI signaling, or NAS signaling. This allows the receiving device to demodulate the target reference signal after receiving it, enabling it to utilize the resolution and representation range corresponding to OTFS modulation technology at different intervals. This reduces the adverse effects of fractional Doppler or fractional delay phenomena in the channel of OTFS modulation technology, thereby improving the accuracy of channel estimation results.

[0176] 1204. The transmitting device performs resource mapping on the reference signal based on the target resource mapping information to obtain the target reference signal.

[0177] 1205. The transmitting device sends the target reference signal to the receiving device.

[0178] 1206. The receiving device receives the target reference signal from the transmitting device.

[0179] The specific content of steps 1104-1106 above is similar to that of steps 302-304 in the aforementioned embodiments, and will not be repeated here.

[0180] As illustrated by the examples in the foregoing embodiments, when the transmitting device is a network device, after determining the target resource mapping information corresponding to the reference signal, the transmitting device can send the target resource mapping information to the receiving device. Furthermore, when performing resource mapping on the reference signal, the transmitting device can obtain the target reference signal by performing multiple equally spaced mappings on the reference signal in the time and frequency domains. This allows the receiving device to utilize the resolution and representation range corresponding to the OTFS modulation technology under different intervals to reduce the adverse effects caused by the fractional Doppler phenomenon or fractional delay phenomenon in the channel of the OTFS modulation technology, thereby improving the accuracy of the channel estimation results.

[0181] Please refer to Figure 13, which shows a fourth interaction flow between the transmitting device and the receiving device provided in an embodiment of this application. Another communication method provided in an embodiment of this application mainly includes the following steps:

[0182] 1301. The transmitting device receives reference signal configuration information from the receiving device.

[0183] The reference signal configuration information includes target resource mapping information.

[0184] If the transmitting device is a terminal device and the receiving device is a network device, the transmitting device can also receive reference signal configuration information carrying target resource mapping information from the receiving device in advance. This allows the transmitting device to perform equal-interval mapping of the reference signal in the time and frequency domains based on the target resource mapping information to obtain the target reference signal. This enables the receiving device to utilize the resolution and representation range corresponding to OTFS modulation technology under different intervals to reduce the adverse effects caused by the fractional Doppler phenomenon or fractional delay phenomenon in the channel of OTFS modulation technology, thereby improving the accuracy of the channel estimation results.

[0185] 1302. The transmitting device determines the reference signal and the target resource mapping information corresponding to the reference signal.

[0186] 1303. The transmitting device performs resource mapping on the reference signal based on the target resource mapping information to obtain the target reference signal.

[0187] 1304. The transmitting device sends the target reference signal to the receiving device.

[0188] 1305. The receiving device receives the target reference signal from the transmitting device.

[0189] The specific content of steps 1302-1305 above is similar to that of steps 301-304 in the aforementioned embodiments, and will not be repeated here.

[0190] As illustrated by the examples in the foregoing embodiments, when the transmitting device is a terminal device and the receiving device is a network device, the transmitting device can receive in advance reference signal configuration information carrying target resource mapping information sent by the receiving device. Furthermore, when performing resource mapping on the reference signal, the transmitting device can obtain the target reference signal by performing equal-interval mapping on the reference signal in the time and frequency domains. This allows the receiving device to utilize the resolution and representation range corresponding to the OTFS modulation technology under different intervals to reduce the adverse effects caused by the fractional Doppler phenomenon or fractional delay phenomenon in the channel of the OTFS modulation technology, thereby improving the accuracy of the channel estimation results.

[0191] Figure 14 is a schematic diagram of a communication device provided in an embodiment of this application. The communication device can specifically be a transmitting device, and the communication device specifically includes:

[0192] The determining module 1401 is used to determine a reference signal and target resource mapping information corresponding to the reference signal. The target resource mapping information includes mapping type and mapping configuration information. The mapping type includes multiple equally spaced mappings.

[0193] The transmitting module 1402 is used to transmit the target reference signal to the receiving device, wherein the target reference signal is obtained by resource mapping of the reference signal based on the target resource mapping information.

[0194] In one possible implementation of this application embodiment, the target resource mapping information includes time-domain resource mapping information and frequency-domain resource mapping information.

[0195] In one possible implementation of this application embodiment, the mapping configuration information includes at least one of the following: number of intervals, interval value, and subcarrier offset value.

[0196] In one possible implementation of this application embodiment, the interval value includes any of the following:

[0197] The value of each of the plurality of intervals;

[0198] Alternatively, the value of the first interval among the plurality of intervals and a first relative difference, wherein the first relative difference includes the difference between the values ​​of the other intervals among the plurality of intervals excluding the first interval and the value of the first interval;

[0199] Alternatively, the value of the first interval, the second relative difference, and the third relative difference among the plurality of intervals, wherein the second relative difference includes the difference between the values ​​of the other intervals among the plurality of intervals excluding the first interval and the number of time-domain symbols of the reference signal, and the third relative difference includes the difference between the values ​​of the other intervals among the plurality of intervals excluding the first interval and the number of subcarriers of the reference signal.

[0200] In one possible implementation of this application embodiment, the subcarrier offset value includes any of the following:

[0201] Starting subcarrier offset value;

[0202] Alternatively, the subcarrier offset value corresponding to each time-domain symbol in the reference signal;

[0203] Alternatively, the starting subcarrier offset value and the relative subcarrier offset values ​​of the other time-domain symbols in the reference signal excluding the first time-domain symbol, wherein the starting subcarrier offset value is the subcarrier offset value corresponding to the first time-domain symbol in the reference signal;

[0204] Or the subcarrier offset value corresponding to each time-domain symbol in the reference signal and the plurality of intervals.

[0205] In one possible implementation of this application embodiment, the generating module 1402 is specifically used for:

[0206] The reference signal is transformed to obtain a time-frequency domain reference signal;

[0207] Based on the target resource mapping information, the time-frequency domain reference signal is mapped to obtain an initial target reference signal;

[0208] The initial target reference signal is modulated based on the first transformation to obtain the target reference signal;

[0209] The target reference signal is sent to the receiving device.

[0210] In one possible implementation of this application embodiment, the sending module 1402 is specifically used for:

[0211] Based on the frequency domain resource mapping information, the time-frequency domain reference signal is frequency-domain mapped to form a frequency domain reference signal pattern of the initial target reference signal. The frequency domain reference signal pattern includes multiple frequency domain resource groups, and each interval in the multiple intervals corresponds to one frequency domain resource group.

[0212] Based on the time-domain resource mapping information, the time-frequency domain reference signal is time-domain mapped to form a time-domain reference signal pattern of the initial target reference signal. The time-domain reference signal pattern includes multiple time-domain resource groups, and each interval in the multiple intervals corresponds to one time-domain resource group. The frequency-domain reference signal pattern and the time-domain reference signal pattern constitute a two-dimensional reference signal pattern of the initial target reference signal.

[0213] In one possible implementation of this application embodiment, the initial resource elements of the plurality of frequency domain resource groups are in the same position and the signals carried by the initial resource elements of the plurality of frequency domain resource groups are the same; the initial resource elements of the plurality of time domain resource groups are in the same position and the signals carried by the initial resource elements of the plurality of time domain resource groups are the same.

[0214] In one possible implementation of this application embodiment, the sending module 1402 is specifically used for:

[0215] The reference signal is transformed by the inverse finite symplectic Fourier transform to obtain the time-frequency domain reference signal.

[0216] In one possible implementation of this application embodiment, the first transformation includes either the inverse fast Fourier transform or the Heisenberg transform.

[0217] In one possible implementation of this application embodiment, if the transmitting device is a network device, the apparatus further includes:

[0218] The transmitting module 1402 is further configured to transmit reference signal configuration information to the receiving device, the reference signal configuration information including the target resource mapping information.

[0219] In one possible implementation of this application embodiment, the sending module 1402 is specifically used for:

[0220] Reference signal configuration information is sent to the receiving device based on a first signaling, wherein the first signaling includes any one of Radio Resource Control (RRC) signaling, Downlink Control Information (DCI) signaling, Non-Access Stratum (NAS) signaling, and Media Access Control (MAC) Control Element (CE) signaling.

[0221] In one possible implementation of this application embodiment, the reference signal is carried in the delayed Doppler domain.

[0222] As illustrated by the examples in the foregoing embodiments, when the transmitting device performs resource mapping on the reference signal, it can obtain the target reference signal by performing multiple equally spaced mappings of the reference signal in the time and frequency domains. This allows the receiving device to utilize the resolution and representation range corresponding to the OTFS modulation technique under different intervals, thereby reducing the adverse effects caused by the fractional Doppler phenomenon or fractional delay phenomenon in the channel of the OTFS modulation technique, and thus improving the accuracy of the channel estimation results.

[0223] Figure 15 is a schematic diagram of a communication device provided in an embodiment of this application. The communication device can specifically be a receiving device, and the communication device specifically includes:

[0224] The receiving module 1501 is used to receive a target reference signal from the transmitting device. The target reference signal is obtained by resource mapping the reference signal based on the target resource mapping information corresponding to the reference signal. The target resource mapping information includes mapping type and mapping configuration information. The mapping type includes multiple equally spaced mappings.

[0225] In one possible implementation of this application embodiment, the target resource mapping information includes time-domain resource mapping information and frequency-domain resource mapping information.

[0226] In one possible implementation of this application embodiment, the mapping configuration information includes at least one of the interval number, interval value, and subcarrier offset value among the plurality of intervals.

[0227] In one possible implementation of this application embodiment, the interval value includes any of the following:

[0228] The value of each of the plurality of intervals;

[0229] Alternatively, the value of the first interval among the plurality of intervals and a first relative difference, wherein the first relative difference includes the difference between the values ​​of the other intervals among the plurality of intervals excluding the first interval and the value of the first interval;

[0230] Alternatively, the value of the first interval, the second relative difference, and the third relative difference among the plurality of intervals, wherein the second relative difference includes the difference between the values ​​of the other intervals among the plurality of intervals excluding the first interval and the number of time-domain symbols of the reference signal, and the third relative difference includes the difference between the values ​​of the other intervals among the plurality of intervals excluding the first interval and the number of subcarriers of the reference signal.

[0231] In one possible implementation of this application embodiment, the subcarrier offset value includes any of the following:

[0232] Starting subcarrier offset value;

[0233] Alternatively, the subcarrier offset value corresponding to each time-domain symbol in the reference signal;

[0234] Alternatively, the starting subcarrier offset value and the relative subcarrier offset values ​​of the other time-domain symbols in the reference signal excluding the first time-domain symbol, wherein the starting subcarrier offset value is the subcarrier offset value corresponding to the first time-domain symbol in the reference signal;

[0235] Or the subcarrier offset value corresponding to each time-domain symbol in the reference signal and the plurality of intervals.

[0236] In one possible implementation of this application embodiment, if the receiving device is a terminal device, the apparatus further includes:

[0237] The receiving module 1501 receives reference signal configuration information from the transmitting device, the reference signal configuration information including the target resource mapping information.

[0238] In one possible implementation of this application embodiment, the receiving module 1501 is specifically used for:

[0239] The reference signal configuration information received from the transmitting device is based on a first signaling, wherein the first signaling includes any one of Radio Resource Control (RRC) signaling, Downlink Control Information (DCI) signaling, Non-Access Stratum (NAS) signaling, and Media Access Control (MAC) Control Element (CE) signaling.

[0240] In one possible implementation of this application embodiment, the reference signal is carried in the delayed Doppler domain.

[0241] As can be seen from the examples in the foregoing embodiments, the receiving device can receive the target reference signal obtained by the transmitting device through multiple equally spaced mappings of the reference signal in the time and frequency domains. This allows the device to utilize the resolution and representation range corresponding to the OTFS modulation technique under different intervals to reduce the adverse effects caused by the fractional Doppler phenomenon or fractional delay phenomenon in the channel of the OTFS modulation technique, thereby improving the accuracy of the channel estimation results.

[0242] Figure 16 illustrates an example of the composition of an electronic device provided in an embodiment of this application. This electronic device may be a first device, including but not limited to a base station and a core network unit. Figure 16 shows a simplified schematic diagram of a base station structure. The base station includes parts 1610, 1620, and 1630. Part 1610 is mainly used for baseband processing and controlling the base station; part 1610 is typically the control center of the base station, often referred to as a processor, used to control the base station to execute the processing operations on the first device side in the above method embodiments. Part 1620 is mainly used for storing computer program code and data. Part 1630 is mainly used for transmitting and receiving radio frequency signals and converting radio frequency signals to baseband signals; part 1630 is often referred to as a transceiver module, transceiver, transceiver circuit, or transceiver unit. The transceiver module of part 1630, also referred to as a transceiver or transceiver unit, includes an antenna 1633 and a radio frequency circuit (not shown in the figure), wherein the radio frequency circuit is mainly used for radio frequency processing. Optionally, the device used to implement the receiving function in part 1630 can be regarded as a receiver, and the device used to implement the transmitting function can be regarded as a transmitter. That is, part 1630 includes receiver 1632 and transmitter 1631. The receiver can also be called a receiving module, receiver, or receiving circuit, etc., and the transmitter can be called a transmitting module, transmitter, or transmitting circuit, etc.

[0243] Sections 1610 and 1620 may include one or more circuit boards, each of which may include one or more processors and one or more memories. The processors are used to read and execute programs from the memories to implement baseband processing functions and control the base station. If multiple circuit boards exist, they can be interconnected to enhance processing capabilities. As an alternative implementation, multiple circuit boards may share one or more processors, multiple circuit boards may share one or more memories, or multiple circuit boards may simultaneously share one or more processors.

[0244] For example, in one implementation, the transceiver module in section 1630 is used to execute the transceiver-related processes performed by the base station (first device) in the aforementioned method embodiments. The processor in section 1610 is used to execute the processing-related processes performed by the base station in the aforementioned method embodiments.

[0245] It should be understood that Figure 16 is merely an example and not a limitation, and the network devices described above, including processors, memory, and transceivers, may not depend on the structure shown in Figure 16.

[0246] Figure 17 illustrates another example of the composition of an electronic device provided in an embodiment of this application. This electronic device can be a second device, which can be a terminal device, including but not limited to mobile phones, smart wearable devices (such as smartwatches), and other electronic devices. Taking a mobile phone as an example, the electronic device may include a processor 310, an external memory interface 320, an internal memory 321, a display screen 330, a camera 340, antenna 1, antenna 2, a mobile communication module 350, and a wireless communication module 360, etc.

[0247] It is understood that the structure illustrated in this embodiment does not constitute a specific limitation on the electronic device. In other embodiments, the electronic device may include more or fewer components than illustrated, or combine some components, or split some components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0248] Processor 310 may include one or more processing units, such as: application processor (AP), modem processor, graphics processing unit (GPU), image signal processor (ISP), controller, video codec, digital signal processor (DSP), baseband processor, and / or neural network processing unit (NPU), etc. Different processing units may be independent devices or integrated into one or more processors.

[0249] It is understood that the interface connection relationships between the modules illustrated in this embodiment are merely illustrative and do not constitute a limitation on the structure of the electronic device. In other embodiments of this application, the electronic device may also employ different interface connection methods or combinations of multiple interface connection methods as described in the above embodiments.

[0250] The external storage interface 320 can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the electronic device. The external memory card communicates with the processor 310 through the external storage interface 320 to perform data storage functions. For example, music, video, and other files can be saved on the external memory card.

[0251] Internal memory 321 can be used to store executable program code, including instructions. Processor 310 executes various functional applications and data processing of the electronic device by running the instructions stored in internal memory 321. Internal memory 321 may include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function (such as sound playback, image playback, etc.), etc. The data storage area may store data created during the use of the electronic device (such as audio data, phonebook, etc.). Furthermore, internal memory 321 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, universal flash storage (UFS), etc. Processor 310 executes various functional applications and data processing of the electronic device by running instructions stored in internal memory 321 and / or instructions stored in memory located within the processor.

[0252] The wireless communication function of electronic devices can be realized through antenna 1, antenna 2, mobile communication module 350, wireless communication module 360, modem processor and baseband processor, etc.

[0253] Antenna 1 and antenna 2 are used to transmit and receive electromagnetic wave signals. Each antenna in the electronic device can be used to cover one or more communication frequency bands. Different antennas can also be reused to improve antenna utilization. For example, antenna 1 can be reused as a diversity antenna for a wireless local area network. In some other embodiments, the antennas can be used in conjunction with a tuning switch.

[0254] The mobile communication module 350 can provide solutions for wireless communication applications including 2G / 3G / 4G / 5G in electronic devices. The mobile communication module 350 may include at least one filter, switch, power amplifier, low noise amplifier (LNA), etc. The mobile communication module 350 can receive electromagnetic waves via antenna 1, and perform filtering, amplification, and other processing on the received electromagnetic waves before transmitting them to a modem processor for demodulation. The mobile communication module 350 can also amplify the signal modulated by the modem processor and convert it into electromagnetic waves for radiation via antenna 1. In some embodiments, at least some functional modules of the mobile communication module 350 may be housed in the processor 310. In some embodiments, at least some functional modules of the mobile communication module 350 and at least some modules of the processor 310 may be housed in the same device.

[0255] In some embodiments, the electronic device initiates or receives call requests via the mobile communication module 350 and the antenna 1.

[0256] Furthermore, an operating system runs on top of the aforementioned components. Examples include iOS, Android, and Windows operating systems. Applications can be installed and run on this operating system. Those skilled in the art will understand that, for the sake of convenience and brevity, explanations and beneficial effects of the relevant content in any of the above-described electronic devices can be found in the corresponding method embodiments provided above, and will not be repeated here.

[0257] This application also provides a communication system, which may include a first device (e.g., a network device such as a base station) as shown in FIG15 and a second device (e.g., a terminal device such as a mobile phone) as shown in FIG16.

[0258] In this application, the terminal device or network device may include a hardware layer, an operating system layer running on top of the hardware layer, and an application layer running on top of the operating system layer. The hardware layer may include hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also known as main memory). The operating system layer may be any one or more computer operating systems that implement business processing through processes, such as Linux, Unix, Android, iOS, or Windows. The application layer may include applications such as browsers, address books, word processing software, and instant messaging software.

[0259] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and modules described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0260] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules 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, or indirect coupling or communication connection between devices or modules, and may be electrical, mechanical, or other forms.

[0261] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical modules; that is, they may be located in one place or distributed across multiple network modules. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0262] Furthermore, the functional modules in the various embodiments of this application can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The integrated modules described above can be implemented in hardware or as software functional modules.

[0263] If the integrated module is implemented as a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the essential contribution of the technical solution of this application, 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 storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the processes of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory, random access memory, magnetic disks, or optical disks.

[0264] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A communication method, characterized in that, Applied to a transmitting device, the method includes: Determine a reference signal and the target resource mapping information corresponding to the reference signal. The target resource mapping information includes a mapping type and mapping configuration information. The mapping type includes multiple equally spaced mappings. A target reference signal is sent to a receiving device, wherein the target reference signal is obtained by resource mapping based on the target resource mapping information.

2. The method according to claim 1, characterized in that, The mapping configuration information includes at least one of the following: the number of intervals, the interval value, and the subcarrier offset value.

3. The method according to claim 2, characterized in that, The interval value includes any of the following: The value of each of the plurality of intervals; Alternatively, the value of the first interval among the plurality of intervals and a first relative difference, wherein the first relative difference includes the difference between the values ​​of the other intervals among the plurality of intervals excluding the first interval and the value of the first interval; Alternatively, the value of the first interval, the second relative difference, and the third relative difference among the plurality of intervals, wherein the second relative difference includes the difference between the values ​​of the other intervals among the plurality of intervals excluding the first interval and the number of time-domain symbols of the reference signal, and the third relative difference includes the difference between the values ​​of the other intervals among the plurality of intervals excluding the first interval and the number of subcarriers of the reference signal.

4. The method according to claim 2 or 3, characterized in that, The subcarrier offset value includes any of the following: Starting subcarrier offset value; Alternatively, the subcarrier offset value corresponding to each time-domain symbol in the reference signal; Alternatively, the starting subcarrier offset value and the relative subcarrier offset values ​​of the other time-domain symbols in the reference signal excluding the first time-domain symbol, wherein the starting subcarrier offset value is the subcarrier offset value corresponding to the first time-domain symbol in the reference signal; Or the subcarrier offset value corresponding to each time-domain symbol in the reference signal and the plurality of intervals.

5. The method according to any one of claims 1 to 4, characterized in that, The step of sending the target reference signal to the receiving device includes: The reference signal is transformed to obtain a time-frequency domain reference signal; Based on the target resource mapping information, the time-frequency domain reference signal is mapped to obtain an initial target reference signal; The initial target reference signal is modulated based on the first transformation to obtain the target reference signal; The target reference signal is sent to the receiving device.

6. The method according to claim 5, characterized in that, The step of performing resource mapping on the time-frequency domain reference signal based on the target resource mapping information to obtain the initial target reference signal includes: Based on the frequency domain resource mapping information in the target resource mapping information, the time-frequency domain reference signal is frequency-domain mapped to form the frequency domain reference signal pattern of the initial target reference signal. The frequency domain reference signal pattern includes multiple frequency domain resource groups, and each interval in the multiple intervals corresponds to one frequency domain resource group. Based on the time-domain resource mapping information in the target resource mapping information, the time-frequency domain reference signal is time-domain mapped to form the time-domain reference signal pattern of the initial target reference signal. The time-domain reference signal pattern includes multiple time-domain resource groups, and each interval in the multiple intervals corresponds to one of the time-domain resource groups. The frequency domain reference signal pattern and the time domain reference signal pattern constitute a two-dimensional reference signal pattern for the initial target reference signal.

7. The method according to claim 6, characterized in that, The initial resource elements of the multiple frequency domain resource groups are in the same position and carry the same signal; the initial resource elements of the multiple time domain resource groups are in the same position and carry the same signal.

8. The method according to claim 7, characterized in that, The transformation of the reference signal to obtain a time-frequency domain reference signal includes: The reference signal is transformed by the inverse finite symplectic Fourier transform to obtain the time-frequency domain reference signal.

9. The method according to claim 5, characterized in that, The first transformation includes either the inverse fast Fourier transform or the Heisenberg transform.

10. The method according to any one of claims 1 to 9, characterized in that, If the transmitting device is a network device, the method further includes: The receiving device is sent reference signal configuration information, which includes the target resource mapping information.

11. The method according to claim 10, characterized in that, The step of sending reference signal configuration information to the receiving device includes: Reference signal configuration information is sent to the receiving device based on a first signaling, wherein the first signaling includes any one of Radio Resource Control (RRC) signaling, Downlink Control Information (DCI) signaling, Non-Access Stratum (NAS) signaling, and Media Access Control (MAC) Control Element (CE) signaling.

12. The method according to any one of claims 1 to 11, characterized in that, The reference signal is carried in the delayed Doppler domain.

13. A communication method, characterized in that, Applied to a receiving device, the method includes: A target reference signal is received from a transmitting device. The target reference signal is obtained by resource mapping the reference signal based on the target resource mapping information corresponding to the reference signal. The target resource mapping information includes mapping type and mapping configuration information. The mapping type includes multiple equally spaced mappings.

14. The method according to claim 13 or 14, characterized in that, The mapping configuration information includes at least one of the following: the number of intervals, the interval value, and the subcarrier offset value.

15. The method according to claim 14, characterized in that, The interval value includes any of the following: The value of each of the plurality of intervals; Alternatively, the value of the first interval among the plurality of intervals and a first relative difference, wherein the first relative difference includes the difference between the values ​​of the other intervals among the plurality of intervals excluding the first interval and the value of the first interval; Alternatively, the value of the first interval, the second relative difference, and the third relative difference among the plurality of intervals, wherein the second relative difference includes the difference between the values ​​of the other intervals among the plurality of intervals excluding the first interval and the number of time-domain symbols of the reference signal, and the third relative difference includes the difference between the values ​​of the other intervals among the plurality of intervals excluding the first interval and the number of subcarriers of the reference signal.

16. The method according to claim 14 or 15, characterized in that, The subcarrier offset value includes any of the following: Starting subcarrier offset value; Alternatively, the subcarrier offset value corresponding to each time-domain symbol in the reference signal; Alternatively, the starting subcarrier offset value and the relative subcarrier offset values ​​of the other time-domain symbols in the reference signal excluding the first time-domain symbol, wherein the starting subcarrier offset value is the subcarrier offset value corresponding to the first time-domain symbol in the reference signal; Or the subcarrier offset value corresponding to each time-domain symbol in the reference signal and the plurality of intervals.

17. The method according to any one of claims 13 to 16, characterized in that, If the receiving device is a terminal device, then before receiving the target reference signal from the transmitting device, the method further includes: The system receives reference signal configuration information from the transmitting device, the reference signal configuration information including the target resource mapping information.

18. The method according to claim 17, characterized in that, The receiving of reference signal configuration information from the transmitting device includes: The reference signal configuration information received from the transmitting device is based on a first signaling, wherein the first signaling includes any one of Radio Resource Control (RRC) signaling, Downlink Control Information (DCI) signaling, Non-Access Stratum (NAS) signaling, and Media Access Control (MAC) Control Element (CE) signaling.

19. A communication device, characterized in that, The communication device includes: Memory is used to store computer programs or computer instructions; A processor for executing a computer program or computer instructions stored in the memory, causing the communication device to perform the method as claimed in any one of claims 1 to 12, or causing the communication device to perform the method as claimed in any one of claims 13 to 18.

20. A computer storage medium for storing a computer program, which, when executed, is used to implement the method of any one of claims 1 to 12, or to implement the method of any one of claims 13 to 18.

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