Communication method, communication device, communication system, and storage medium

Abstract

The present disclosure provides a communication method, a communication device, a communication system, and a storage medium. The method comprises: determining Nguard, wherein Nguard is used for indicating a count of resource elements (REs) occupied by a guard symbol in a delay-Doppler (DD) domain of a first resource, the guard symbol is used for eliminating mutual interference between a pilot symbol and a data symbol in the DD domain, and the first resource comprises at least one of the following: an uplink resource and a downlink resource; and sending a signal or receiving a signal on the first resource on the basis of Nguard. The method of the present disclosure can save resources, improve transmission efficiency, and ensure communication performance.

Description

Communication methods, communication equipment, communication systems, storage media Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to communication methods, communication devices, communication systems, and storage media. Background Technology

[0002] In communication systems, Orthogonal Frequency Division Multiplexing (OFDM) systems are often used. However, in time-varying channels, especially in high-speed mobile environments, OFDM and Discrete Fourier Transform-Extended Orthogonal Frequency Division Multiplexing (DFT-S-OFDM) often encounter inter-symbol interference (ISI) and inter-carrier interference (ICI). Furthermore, OFDM is also prone to ICI under Doppler frequency offset, and in rapidly fading channels, signal energy tends to concentrate on certain subcarriers, leading to performance degradation. Summary of the Invention

[0003] This disclosure provides communication methods, communication devices, communication systems, and storage media.

[0004] According to a first aspect of the embodiments of this disclosure, a communication method is provided, executed by a first device, comprising: determining N guard The N guard The number of resource particles (REs) used to indicate the number of protection symbols in the delay-Doppler (DD) domain of the first resource; the protection symbols are used to eliminate mutual interference between pilot symbols and data symbols in the DD domain, and the first resource includes at least one of the following: uplink resources and downlink resources; based on the N... guard Send or receive signals on the first resource.

[0005] According to a second aspect of the present disclosure, a first device is provided, comprising: a processing module configured to determine N guard The N guard The number of resource particles (REs) used to indicate the number of protection symbols occupied by the protection symbols in the delay-Doppler (DD) domain of the first resource; the protection symbols are used to eliminate mutual interference between pilot symbols and data symbols in the DD domain; the first resource includes at least one of the following: uplink resources and downlink resources; a transceiver module is used to indicate the number of resource particles (REs) .... guard Send or receive signals on the first resource.

[0006] According to a third aspect of the embodiments of this disclosure, a communication device is provided, comprising:

[0007] One or more processors;

[0008] The processor is used to invoke instructions to cause the communication device to execute the communication method described in the first aspect.

[0009] According to a fourth aspect of the present disclosure, a communication system is provided, including a terminal and a network device, wherein the terminal and the network device are configured to implement the communication method described in the first aspect.

[0010] According to a fifth aspect of the present disclosure, a storage medium is provided that stores instructions that, when executed on a communication device, cause the communication device to perform the communication method as described in the first aspect.

[0011] According to a sixth aspect of the present disclosure, the present disclosure provides a program product including a computer program that, when executed by a communication device, implements the communication method as described in the first aspect.

[0012] According to a seventh aspect of the present disclosure, the present disclosure provides a computer program that, when run on a computer, causes the computer to perform the communication method as described in the first aspect.

[0013] It is understood that the aforementioned terminals, network devices, communication devices, communication systems, storage media, program products, and computer programs are all used to execute the methods proposed in the embodiments of this disclosure. Therefore, the beneficial effects they can achieve can be referred to the beneficial effects in the corresponding methods, and will not be repeated here. Attached Figure Description

[0014] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0015] Figure 1 is a schematic diagram of the architecture of the communication system provided in an embodiment of this disclosure;

[0016] Figure 2A is an interactive schematic diagram of a communication method provided in an embodiment of this disclosure;

[0017] Figure 2B is a schematic diagram of the protection symbol when both the time delay domain dimension and the Doppler domain dimension are large, as shown in the embodiments of this disclosure;

[0018] Figure 2C shows the satellite elevation angle α according to an embodiment of this disclosure. model A schematic diagram;

[0019] Figure 2D is a schematic diagram of the protection symbol when the time delay domain dimension is large and the Doppler domain dimensions are small, as shown in the embodiments of this disclosure;

[0020] Figure 2E is a schematic diagram of the protection symbol when the time delay domain dimension is small and the Doppler domain dimensions are large, as shown in the embodiments of this disclosure;

[0021] Figures 2F-2J illustrate the IMCS index, code rate R, and modulation order Q according to embodiments of this disclosure. m A diagram illustrating the correspondence between them;

[0022] Figure 2K illustrates an embodiment of this disclosure where, when the first resource is PUSCH and transform precoding is enabled, the terminal determines the IMCS index, code rate R, and modulation order Q. m A diagram illustrating the correspondence between them;

[0023] Figure 2L is a schematic diagram illustrating the calculation of the TBS of the first resource according to an embodiment of this disclosure;

[0024] Figure 2M is a schematic diagram of a DD domain resource grid pattern shown in an embodiment of this disclosure;

[0025] Figure 3A is a schematic flowchart of a communication method provided in another embodiment of this disclosure;

[0026] Figure 3B is a schematic diagram of the mutual conversion between DD domain and TF domain resource grids provided in an embodiment of this disclosure;

[0027] Figure 3C is a schematic diagram of basic modulation and demodulation provided in an embodiment of this disclosure;

[0028] Figure 3D is a schematic diagram of a DD domain resource grid provided in an embodiment of this disclosure;

[0029] Figure 4 is a schematic diagram of the structure of a first device provided in an embodiment of this disclosure;

[0030] Figure 5A is a schematic diagram of the structure of a communication device provided in an embodiment of this disclosure;

[0031] Figure 5B is a schematic diagram of the structure of a chip provided in an embodiment of this disclosure. Detailed Implementation

[0032] This disclosure provides embodiments of a communication method, a communication device, a communication system, and a storage medium.

[0033] In a first aspect, embodiments of this disclosure provide a communication method executed by a first device, the method comprising: determining N guard The N guard The number of resource particles (REs) used to indicate the number of protection symbols in the delay-Doppler (DD) domain of the first resource; the protection symbols are used to eliminate mutual interference between pilot symbols and data symbols in the DD domain, and the first resource includes at least one of the following: uplink resources and downlink resources; based on the N... guardSend or receive signals on the first resource.

[0034] In the above embodiment, the first device determines the number N of REs occupied by the DD field protection symbol of the first resource. guard Furthermore, when the first device subsequently sends or receives signals on the first resource, it can be based on N. guard The signal is sent or received. The protection symbol is used to eliminate mutual interference between pilot symbols and data symbols in the DD domain. This protection symbol can be, for example, a symbol that does not carry information. Therefore, in this embodiment, when the first device communicates on the first resource, it considers the protection symbol that does not carry information to avoid it affecting the communication of the first device. For example, when determining the TBS of the first resource, the first device may not count the number of REs occupied by the protection symbol. This ensures that the TBS determined by the first device does not include the "protection symbol that does not carry information," avoiding the situation where "the determined TBS includes the protection symbol that does not carry information, resulting in resource waste during subsequent communication based on that TBS." Thus, this embodiment can save resources, improve transmission efficiency, and ensure communication performance.

[0035] In conjunction with some embodiments of the first aspect, in some embodiments, the first device includes a terminal or network device.

[0036] In the above embodiments, it is explained which devices the first device can be, so that these devices can use the methods of this disclosure to communicate in order to ensure communication performance.

[0037] In conjunction with some embodiments of the first aspect, in some embodiments, the determination of N guard The method includes: determining the delay resolution Δτ of the DD domain and the Doppler resolution Δv of the DD domain based on at least one of the delay domain dimension M of the first resource, the Doppler domain dimension N of the first resource, the parameter μ, and the cyclic prefix CP type of the first resource; wherein, μ is used to indicate the subcarrier spacing of the first resource;

[0038] Based on the maximum delay in the DD domain max At least one of the time delay domain dimension M and the time delay resolution Δτ is determined. The Used to indicate the number of REs occupied by the guard symbols on both sides of the pilot symbol in the time delay domain;

[0039] Determined based on at least one of the satellite moving speed v, the Doppler domain dimension N, and the Doppler resolution Δv. The Used to indicate the number of REs occupied by the guard symbols on both sides of the pilot symbol in the Doppler domain;

[0040] Based on the above and stated Determine the N guard The

[0041] In conjunction with some embodiments of the first aspect, in some embodiments, the determination of N guard This includes: the time delay domain dimension M is greater than the time delay domain threshold M. max The dimension N of the Doppler domain is greater than the threshold N of the Doppler domain. max The The Or, the Among them, the The c is the speed of light, f c Let R be the center frequency of the first resource, R be the Earth's radius, h be the orbital altitude of the satellite, and α be the center frequency of the first resource. model This refers to the satellite elevation angle of the terminal.

[0042] In conjunction with some embodiments of the first aspect, in some embodiments, the determination of N guard This includes: the time delay domain dimension M is greater than the time delay domain threshold M. max The Doppler domain dimension N is less than or equal to the Doppler domain threshold N. max The The

[0043] In conjunction with some embodiments of the first aspect, in some embodiments, the determination of N guard This includes: the time delay domain dimension M is less than or equal to the time delay domain threshold M. max The dimension N of the Doppler domain is greater than the threshold N of the Doppler domain. max The The Or, the aforementioned Among them, the The c is the speed of light, f c Let R be the center frequency of the first resource, R be the Earth's radius, h be the orbital altitude of the satellite, and α be the center frequency of the first resource. model This refers to the satellite elevation angle of the terminal.

[0044] In the above embodiments, N was described. guard The method for determining N is so that the first device can accurately determine N. guard Then the first device can subsequently be based on N guard It is used to send or receive signals in order to "save resources, improve transmission efficiency, and ensure communication performance".

[0045] In conjunction with some embodiments of the first aspect, in some embodiments, the N-based guard Sending or receiving signals on the first resource includes:

[0046] Based on the N guard Sure The or, Where M is the time delay domain dimension of the first resource, and N is the Doppler domain dimension of the first resource. N represents the number of REs occupied by pilot symbols in the DD domain. oh Configured by network devices and / or as agreed by protocols, The number of REs occupied by pilot symbols in the DD domain and N guard sum;

[0047] Based on the above Send or receive signals on the first resource.

[0048] In conjunction with some embodiments of the first aspect, in some embodiments, the statement based on the Sending or receiving signals on the first resource includes:

[0049] Determine N RE The N RE Used to indicate the number of REs occupied by the first resource in a time slot in the time-frequency TF domain. The Used to indicate the number of subcarriers included within a resource block (RB), the Used to indicate the number of symbols included in a time slot;

[0050] Based on the N RE Determine the transport block size (TBS) of the first resource;

[0051] Based on the above Rate matching is performed with the TBS to transmit or receive signals on the first resource.

[0052] In conjunction with some embodiments of the first aspect, in some embodiments, the statement based on the Sending or receiving signals on the first resource includes:

[0053] Based on the above Determine the TBS of the first resource;

[0054] Based on the TBS, signals are sent or received on the first resource.

[0055] In the above embodiments, it is explained how the first device is based on N guard Sending or receiving signals on the first resource so that the first device can be based on N guard High-performance communication is achieved on primary resources, while also preventing resource waste during communication.

[0056] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes: based on the The The position of the pilot symbol in the DD domain determines the position of the protection symbol in the DD domain.

[0057] In conjunction with some embodiments of the first aspect, in some embodiments, the maximum delay of the DD domain is l max Based on the maximum delay spread and the first delay determination, the first delay includes the maximum delay of the non-terrestrial network NTN channel, the first delay and the maximum delay spread are agreed by the protocol, and / or the first delay and the maximum delay spread are configured by the network device.

[0058] In the above embodiments, the first device also determines the position of the protection symbol in the DD domain, thereby enabling the first device to more accurately determine the TBS based on the position of the protection symbol in the DD domain, further ensuring communication performance. Simultaneously, the above embodiments also describe the maximum latency of the DD domain. max The method for determining this is so that the first device can accurately determine the maximum delay in the DD domain. max Thus, the first device can be based on the maximum latency in the DD domain. max Accurately determine N guard And based on N guard High-performance communication is achieved on primary resources, while also preventing resource waste during communication.

[0059] In conjunction with some embodiments of the first aspect, in some embodiments, the first device includes a terminal, and the method further includes at least one of the following: receiving first information sent by a network device, and determining the delay domain dimension M and the Doppler domain dimension N based on the first information; wherein the first information is used to indicate the number of subcarriers and the number of time-domain symbols of the first resource in the TF domain; receiving second information sent by the network device, the second information being used to indicate the delay domain dimension M and the Doppler domain dimension N.

[0060] In conjunction with some embodiments of the first aspect, in some embodiments, the first device includes a terminal, and the method further includes: sending third information to a network device, the third information being used by the network device to determine the N. guard .

[0061] In conjunction with some embodiments of the first aspect, in some embodiments, the first device includes a terminal, wherein the determination of N guard This includes: receiving fourth information sent by a network device; the fourth information is used by the terminal to determine the N. guard Based on the fourth information, determine the N. guard .

[0062] In conjunction with some embodiments of the first aspect, in some embodiments, the first device includes a network device, and the method further includes at least one of the following: sending first information to a terminal, the first information being used to determine the delay domain dimension M and the Doppler domain dimension N; the first information indicating the number of subcarriers and the number of time domain symbols of the first resource in the TF domain; and sending second information to the terminal, the second information being used to indicate the delay domain dimension M and the Doppler domain dimension N.

[0063] In conjunction with some embodiments of the first aspect, in some embodiments, the first device includes a network device, wherein the determination of N guard Includes: receiving third information sent by the terminal, the third information being used by the network device to determine the N. guard Based on the third information, determine the N. guard .

[0064] In conjunction with some embodiments of the first aspect, in some embodiments, the first device includes a network device, and the method further includes: sending fourth information to a terminal; the fourth information is used by the terminal to determine the N. guard .

[0065] In conjunction with some embodiments of the first aspect, in some embodiments, the third information includes at least one of the following: the location information of the terminal, the satellite elevation angle of the terminal, N guard The location information is used to determine the satellite elevation angle.

[0066] In conjunction with some embodiments of the first aspect, in some embodiments, the fourth information includes at least one of the following: a first pattern, N guard Wherein, the first pattern is the pattern of the protection symbol in the first resource DD domain.

[0067] The above embodiments illustrate how N is determined between the terminal and the network device. guard So that the N determined by the terminal and network equipment guard The sameness makes the terminal and network devices similar to N guard The values ​​are interpreted uniformly, which ensures the accuracy of communication.

[0068] Secondly, embodiments of this disclosure provide a first device, comprising: a processing module, configured to determine N guard The N guard The number of resource particles (REs) used to indicate the number of protection symbols occupied by the protection symbols in the delay-Doppler (DD) domain of the first resource; the protection symbols are used to eliminate mutual interference between pilot symbols and data symbols in the DD domain; the first resource includes at least one of the following: uplink resources and downlink resources; a transceiver module is used to indicate the number of resource particles (REs) .... guard Send or receive signals on the first resource.

[0069] Thirdly, embodiments of this disclosure provide a communication device, which includes: one or more processors; one or more memories for storing instructions; wherein the processors are used to invoke the instructions to cause the communication device to perform the method described in the first aspect and the optional implementation of the first aspect.

[0070] Fourthly, embodiments of this disclosure provide a communication system comprising: a terminal and a network device; wherein the terminal and network device are configured to perform the methods described in the first aspect and optional implementations thereof.

[0071] Fifthly, embodiments of this disclosure provide a storage medium storing instructions that, when executed on a communication device, cause the communication device to perform the method described in the first aspect and its optional implementations.

[0072] In a sixth aspect, embodiments of this disclosure provide a program product, including a computer program that, when executed by a processor, implements the method as described in the first aspect and optional implementations of the first aspect.

[0073] In a seventh aspect, embodiments of this disclosure provide a computer program that, when run on a computer, causes the computer to perform the methods described in the first aspect and optional implementations of the first aspect.

[0074] It is understood that the aforementioned terminals, network devices, communication devices, communication systems, storage media, program products, and computer programs are all used to execute the methods proposed in the embodiments of this disclosure. Therefore, the beneficial effects they can achieve can be referred to the beneficial effects in the corresponding methods, and will not be repeated here.

[0075] This disclosure provides communication methods, communication devices, communication systems, and storage media. In some embodiments, terms such as resource selection method and information processing method may be used interchangeably.

[0076] This disclosure is not exhaustive, but merely illustrative of some embodiments, and is not intended to limit the scope of protection of this disclosure. Unless otherwise specified, each step in a particular embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a particular embodiment can also be implemented as an independent embodiment, and the order of the steps in a particular embodiment can be arbitrarily interchanged. Furthermore, the optional implementation methods in a particular embodiment can be arbitrarily combined; moreover, the embodiments can be arbitrarily combined, for example, some or all steps of different embodiments can be arbitrarily combined, and a particular embodiment can be arbitrarily combined with the optional implementation methods of other embodiments. In all embodiments of this disclosure, unless otherwise specified or logically conflicting, the terminology and / or descriptions between the embodiments are consistent and can be mutually referenced. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0077] The terminology used in the embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure.

[0078] In this embodiment of the disclosure, unless otherwise stated, elements expressed in the singular form, such as "a," "an," "the," "the," "the," "the," "the," "the," "this," etc., can mean "one and only one," or "one or more," "at least one," etc. For example, when using articles such as "a," "an," "the," etc. in translation, the noun following the article can be understood as either a singular expression or a plural expression.

[0079] In the embodiments disclosed herein, "multiple" refers to two or more.

[0080] In some embodiments, the terms “at least one of A or B, at least one of A and B”, “one or more”, “a plurality of”, “multiple”, etc., may be used interchangeably.

[0081] In some embodiments, the notation "at least one of A and B", "A and / or B", "A in one case, B in another", "in response to one case A, in response to another case B", etc., may include the following technical solutions depending on the situation: in some embodiments, A (execute A regardless of whether there is a branch B); in some embodiments, B (execute B regardless of whether there is a branch A); in some embodiments, execution is selected from A and B (A and B are selectively executed); in some embodiments, both A and B are executed. The same applies when there are more branches such as A, B, C, etc.

[0082] In some embodiments, the notation "A or B" may include the following technical solutions, depending on the situation: in some embodiments, A (execute A regardless of whether a branch B exists); in some embodiments, B (execute B regardless of whether a branch A exists); in some embodiments, execution is selected from A and B (A and B are selectively executed). The same applies when there are more branches such as A, B, and C.

[0083] The prefixes "first," "second," etc., used in the embodiments of this disclosure are merely for distinguishing different descriptive objects and do not impose restrictions on the position, order, priority, quantity, or content of the descriptive objects. The description of the descriptive objects is found in the claims or the context of the embodiments, and the use of prefixes should not constitute unnecessary restrictions. For example, if the descriptive object is a "field," the ordinal numbers preceding "field" in "first field" and "second field" do not restrict the position or order of the "fields." "First" and "second" do not restrict whether the "fields" they modify are in the same message, nor do they restrict the order of "first field" and "second field." Similarly, if the descriptive object is a "level," the ordinal numbers preceding "level" in "first level" and "second level" do not restrict the priority between "levels." Furthermore, the number of descriptive objects is not limited by ordinal numbers and can be one or more. For example, in "first device," the number of "devices" can be one or more. Furthermore, the objects modified by different prefixes can be the same or different. For example, if the object being described is "device", then "first device" and "second device" can be the same device or different devices, and their types can be the same or different. Similarly, if the object being described is "information", then "first information" and "second information" can be the same information or different information, and their content can be the same or different.

[0084] In some embodiments, “including A,” “containing A,” “for indicating A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0085] In some embodiments, terms such as "time / frequency" and "time-frequency domain" refer to the time domain and / or frequency domain.

[0086] In some embodiments, terms such as “in response to…”, “in response to determining…”, “in the case of…”, “when…”, “if…”, “if…”, etc. can be used interchangeably. These descriptions all refer to the device taking corresponding actions under certain objective circumstances. They do not necessarily limit the time, nor do they require the device to have a judgment action when implementing it, nor do they mean that there must be other limitations.

[0087] In some embodiments, the terms “greater than,” “greater than or equal to,” “not less than,” “more than,” “more than or equal to,” “not less than,” “higher than,” “higher than or equal to,” “not lower than,” and “above” can be used interchangeably, as can the terms “less than,” “less than or equal to,” “not greater than,” “less than,” “less than or equal to,” “not more than,” “lower than,” “lower than or equal to,” “not higher than,” and “below”.

[0088] In some embodiments, devices, etc., may be interpreted as physical or virtual, and their names are not limited to those described in the embodiments. Terms such as “device,” “equipment,” “circuit,” “network element,” “network function,” “network device,” “function,” “node,” “unit,” “section,” “system,” “network,” “chip,” “chip system,” “entity,” and “subject” are interchangeable.

[0089] In some embodiments, "network" can be interpreted as devices included in a network (e.g., access network devices, core network devices, etc.).

[0090] In some embodiments, the terms "access network device (AN device)," "radio access network device (RAN device)," "base station (BS)," "radio base station," "fixed station," "node," "access point," "transmission point (TP)," "reception point (RP)," "transmission / reception point (TRP)," "panel," "antenna panel," "antenna array," "cell," "macro cell," "small cell," "femto cell," "pico cell," "sector," "cell group," "serving cell," "carrier," "component carrier," and "bandwidth part (BWP)" can be used interchangeably.

[0091] In some embodiments, the terms "terminal", "terminal device", "user equipment (UE)", "user terminal", "mobile station (MS)", "mobile terminal (MT)", "subscriber station", "mobile unit", "subscriber unit", "wireless unit", "remote unit", "mobile device", "wireless device", "wireless communication device", "remote device", "mobile subscriber station", "access terminal", "mobile terminal", "wireless terminal", "remote terminal", "handset", "user agent", "mobile client", and "client" can be used interchangeably.

[0092] In some embodiments, access network devices, core network devices, or network devices can be replaced by terminals. For example, embodiments of this disclosure can also be applied to structures where communication between access network devices, core network devices, or network devices and terminals is replaced by communication between multiple terminals (e.g., device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, the structure can also be configured such that the terminal has all or part of the functions of the access network device. Furthermore, terms such as "uplink" and "downlink" can be replaced with terms corresponding to communication between terminals (e.g., "sidelink"). For example, uplink channel, downlink channel, etc., can be replaced with sidelink channel, and uplink link, downlink, etc., can be replaced with sidelink link.

[0093] In some embodiments, the terminal may be replaced by an access network device, a core network device, or a network device. In this case, the access network device, core network device, or network device may also be configured to have all or some of the functions of the terminal.

[0094] In some embodiments, the acquisition of data, information, etc., may comply with the laws and regulations of the country where the location is situated.

[0095] In some embodiments, data, information, etc., may be obtained with the user's consent.

[0096] Furthermore, each element, each row, or each column in the table of this disclosure can be implemented as an independent embodiment, and any combination of any element, any row, or any column can also be implemented as an independent embodiment.

[0097] Figure 1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure. As shown in Figure 1, the communication system 100 may include at least one of a terminal and a network device; optionally, the network device may include at least one of an access network device and a core network device.

[0098] In some embodiments, the terminal includes, but is not limited to, at least one of the following: mobile phone, wearable device, Internet of Things device, car with communication function, smart car, tablet, computer with wireless transceiver function, virtual reality (VR) terminal device, augmented reality (AR) terminal device, wireless terminal device in industrial control, wireless terminal device in self-driving, wireless terminal device in remote medical surgery, wireless terminal device in smart grid, wireless terminal device in transportation safety, wireless terminal device in smart city, and wireless terminal device in smart home.

[0099] In some embodiments, the access network device is, for example, a node or device that connects a terminal to a wireless network. The access network device may include at least one of the following in a 5G communication system: evolved Node B (eNB), next-generation evolved Node B (ng-eNB), next-generation Node B (gNB), Node B (NB), Home Node B (HNB), Home evolved Node B (HeNB), radio backhaul device, radio network controller (RNC), base station controller (BSC), base transceiver station (BTS), base band unit (BBU), mobile switching center, base station in a 6G communication system, open RAN, cloud RAN, base station in other communication systems, and access node in a Wi-Fi system, but is not limited thereto.

[0100] In some embodiments, the technical solutions of this disclosure can be applied to the Open RAN architecture. In this case, the interfaces between or within access network devices involved in the embodiments of this disclosure can be transformed into internal interfaces of Open RAN. The processes and information interactions between these internal interfaces can be implemented by software or programs.

[0101] In some embodiments, the access network device may be composed of a central unit (CU) and a distributed unit (DU). The CU may also be called a control unit. The CU-DU structure can separate the protocol layer of the access network device. Some protocol layer functions are centrally controlled by the CU, while the remaining part or all protocol layer functions are distributed in the DU and centrally controlled by the CU. However, this is not the only possibility.

[0102] In some embodiments, a core network device may be a single device comprising one or more network elements, or it may be multiple devices or a group of devices, each comprising all or part of the aforementioned one or more network elements. Network elements may be virtual or physical. The core network may include, for example, at least one of the following: Evolved Packet Core (EPC), 5G Core Network (5GCN), and Next Generation Core (NGC).

[0103] It is understood that the communication system described in this disclosure is for the purpose of more clearly illustrating the technical solutions of this disclosure, and does not constitute a limitation on the technical solutions proposed in this disclosure. As those skilled in the art will know, with the evolution of system architecture and the emergence of new business scenarios, the technical solutions proposed in this disclosure are also applicable to similar technical problems.

[0104] The following embodiments of this disclosure can be applied to the communication system 100 shown in FIG1, or to some of the main bodies, but are not limited thereto. The main bodies shown in FIG1 are illustrative. The communication system may include all or some of the main bodies in FIG1, or may include other main bodies outside of FIG1. ​​The number and form of each main body are arbitrary. The connection relationship between the main bodies is illustrative. The main bodies may not be connected or may be connected. The connection can be in any way, it can be a direct connection or an indirect connection, it can be a wired connection or a wireless connection.

[0105] The embodiments disclosed herein can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th Generation mobile communication system (4G), 5th Generation mobile communication system (5G), 5G New Radio (NR), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New Radio Access (NX), Future Generation Radio Access (FX), Global System for Mobile communications (GSM), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), and IEEE 802.20, Ultra-Wideband (UWB), Bluetooth (a registered trademark), Public Land Mobile Network (PLMN) networks, Device-to-Device (D2D) systems, Machine-to-Machine (M2M) systems, Internet of Things (IoT) systems, Vehicle-to-Everything (V2X) systems, systems utilizing other resource selection methods, and next-generation systems built upon them, etc. Furthermore, multiple systems can be combined (e.g., a combination of LTE or LTE-A with 5G).

[0106] Optionally, to address the issues of ISI, ICI, and communication performance degradation that are prone to occur in OFDM systems, an Orthogonal Time Frequency and Space (OTFS) system is introduced. OTFS is a two-dimensional modulation scheme that modulates in the Delay-Doppler (DD) domain. By mapping the signal to a two-dimensional time-frequency space for modulation, OTFS can effectively suppress the effects of frequency offset and channel fading. In the face of Doppler frequency offset and time-varying channels, especially in high dynamic environments, OTFS has significant advantages and can greatly improve communication performance.

[0107] Optionally, in some embodiments, the communication method based on the OTFS system may include, for example, the following steps: the transmitter first maps the signal to be transmitted onto a two-dimensional grid in the DD domain, and then transforms the signal to the time-frequency (TF) domain of the OFDM system using an inverse symplectic finite fourier transform (ISFFT). Afterwards, the TF domain signal can be transmitted using a multi-carrier system. For example, the TF domain signal can be transformed into the time domain using a Heisenberg transform to obtain the OTFS system's time-domain signal, which is then transmitted to the receiver via a channel. Optionally, after the OTFS system's time-domain signal is transmitted to the receiver via a time-varying channel, the receiver first performs a Wigner transform on the received signal to transform it to the TF domain, and then performs a symplectic finite fourier transform (SFFT) to restore the signal to the DD domain, thereby realizing signal transmission in the OTFS system.

[0108] In some embodiments, the DD domain of the OTFS system reserves protection symbols. For example, in channels based on embedded pilots, protection symbols are reserved in the DD domain. These protection symbols are blank symbols that do not carry information and are used to eliminate mutual interference between pilot symbols and data symbols. However, the reserved protection symbols affect the determination of the Transport Block Size (TBS), causing an inaccurate correspondence between the determined TBS and the symbols that actually carry information in the DD domain. For example, if the TBS includes protection symbols that do not carry information, subsequent communication based on the TBS will affect transmission performance and waste resources.

[0109] Figure 2A is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure. As shown in Figure 2A, this embodiment of the disclosure relates to a communication method for a communication system 100; the method includes:

[0110] Step 2101: The network device configures the first resource to the terminal.

[0111] In some embodiments, the first resource may be a transmission resource between a network device and a terminal. Optionally, the first resource may include at least one of the following: uplink resources and downlink resources. Optionally, the downlink resources may be resources used for downlink transmission, and downlink resources may include, for example, Physical Downlink Shared Channel (PDSCH) resources. The uplink resources may be resources used for uplink transmission, and uplink resources may include, for example, Physical Uplink Shared Channel (PUSCH) resources.

[0112] Step 2102: The network device sends at least one of the first information and the second information to the terminal.

[0113] Optionally, in some embodiments, the first information can be used to indicate the frequency domain dimension (e.g., frequency domain length, number of subcarriers) and time domain dimension (e.g., time domain length, number of time domain symbols) of the first resource in the time-frequency (TF) domain. Optionally, the first information can be used to implicitly determine the delay domain dimension M and Doppler domain dimension N of the first resource in the delay-Doppler (DD) domain; for example, the delay domain dimension M of the DD domain can be equal to the frequency domain dimension indicated by the first information, and the Doppler dimension N of the DD domain can be equal to the time domain dimension indicated by the first information. For the "relationship between the DD domain and the TF domain," please refer to the description preceding the embodiment in Figure 2A.

[0114] Optionally, the second information can be used to indicate (e.g., explicitly indicate) the time delay domain dimension M and the Doppler domain dimension N.

[0115] Optionally, the aforementioned time delay domain dimension M can be understood, for example, as the length of the first resource in the time delay domain of the DD domain, and the aforementioned Doppler domain dimension N can be understood, for example, as the length of the first resource in the Doppler domain of the DD domain.

[0116] Optionally, M and N can be determined by the network device based on its corresponding first resource, or M and N can be agreed upon by the protocol.

[0117] Optionally, steps 2101 and 2102 can be swapped in order or performed simultaneously.

[0118] Step 2103: Determine N for network devices and terminals. guard .

[0119] Alternatively, in some embodiments, N guardThis can be used to indicate the number of resource elements (REs) occupied by the guard symbol in the DD domain of the OTFS system for a first resource. Optionally, an RE in the DD domain can refer to a small transport cell in the DD domain resource grid. In some embodiments, the guard symbol can be used to separate pilot symbols and data symbols in the DD domain. For example, the guard symbol can be located around the pilot symbol to separate the pilot symbol and the data symbol, thereby eliminating mutual interference between the pilot symbol and the data symbol in the DD domain. Optionally, the pilot symbol can be used to carry a pilot signal, such as a demodulation reference signal (DMRS). Optionally, the data symbol can be used to carry a data signal.

[0120] In some embodiments, the above-mentioned N guard The calculation process may include the following steps:

[0121] Step 21031: Determine the time delay resolution Δτ and the Doppler resolution Δv of the first resource DD domain.

[0122] Optionally, the delay resolution Δτ and Doppler resolution Δv can be determined based on at least one of the delay domain dimension M, Doppler domain dimension N, parameter μ, and the cyclic prefix (CP) type of the first resource. Optionally, the parameter μ can be used to indicate the subcarrier spacing. Optionally, the parameter μ and CP type can be agreed upon by the protocol and / or configured by the network device. For example, the parameter μ can be configured by the higher-layer parameter subcarrierSpacing, and the CP type can be configured by the higher-layer parameter cyclicPrefix. Optionally, Table 1 is a table showing the correspondence between the parameter μ, CP type, and delay resolution Δτ and Doppler resolution Δv as illustrated in the embodiments of this disclosure. Optionally, the symbol time in Table 1 can be determined based on the CP type. The content in Table 1 can be agreed upon by the protocol and / or configured by the network device.

[0123] Table 1

[0124] Referring to Table 1 above, when parameter μ is 0 (i.e., SCS = 15 kHz), the symbol time corresponding to the CP type is... At that time, the time delay resolution Δτ is: The Doppler resolution Δv is: Where M is the time delay domain dimension and N is the Doppler domain dimension. Optionally, when the parameter μ is 2, SCS = 60kHz. In this case, there are normal cyclic prefixes and extended cyclic prefixes. For the normal cyclic prefix, each slot consists of 14 symbols, and the duration of each symbol is... ms (milliseconds), Doppler resolution is kHz; for the extended cyclic prefix, each slot consists of 12 symbols, each with a duration of kHz. ms, Doppler resolution is kHz.

[0125] Step 21032, Maximum delay based on DD domain max At least one of the following must be determined: the time delay domain dimension M, and the time delay resolution Δτ. Determined based on at least one of the following: satellite moving speed v, Doppler domain dimension N, and Doppler resolution Δv.

[0126] Optionally, the above-mentioned "maximum delay in the DD domain" max "It can be determined based on the maximum delay spread and the first delay, for example: l" max = First delay × Maximum delay extension. Optionally, the first delay may include the maximum delay of the non-terrestrial network (NTN) channel. The first delay and the maximum delay extension may be agreed upon by the protocol and / or configured by the network device.

[0127] Optionally, the above It can be used to indicate the number of REs occupied by the guard symbols on both sides of the pilot symbol in the time delay domain. It can be used to indicate the number of REs occupied by the guard symbols on both sides of the pilot symbol in the Doppler domain.

[0128] In some embodiments, when determining When the time delay domain dimension M and the Doppler domain dimension N of the DD domain are different, The methods for determining this will also differ.

[0129] In some embodiments, the latency domain threshold M can be determined first based on protocol agreements and / or network device configurations. max and Doppler domain threshold N max Optionally, when the time delay domain dimension M is greater than the time delay domain threshold M max The dimension N of the Doppler domain is greater than the threshold N of the Doppler domain. maxNote that the time delay domain dimension and Doppler domain dimension of the DD domain are both relatively large, or it can be said that the time delay domain dimension is an integer multiple of the time delay resolution Δτ, and the Doppler domain dimension is an integer multiple of the Doppler resolution Δv (i.e., there are cases where they are not integer multiples, but they can still be approximated as integer multiples). or, in, f dmax This can be understood as: the maximum Doppler frequency shift f coarsely estimated based on the satellite's moving speed v. dmax Optionally, the coarse estimate of the maximum Doppler frequency shift does not consider the influence of the angle between the satellite's motion direction and the signal propagation path, where c is the speed of light and f is the maximum Doppler frequency shift. c The center frequency of the first resource, f d This can be understood as: the Doppler frequency offset determined by the satellite's moving speed v, where R is the Earth's radius and h is the satellite's orbital altitude, such as the orbital altitude of a terminal communication satellite, α. model The satellite elevation angle of the terminal. Optionally, Figure 2B is a schematic diagram of the protection symbol when both the time delay domain dimension and the Doppler domain dimension are large, as shown in an embodiment of this disclosure. As shown in Figure 2B, In Figure 2B, the square carrying "p" is the RE containing the pilot symbol in the DD domain.

[0130] Optionally, the above-mentioned "satellite moving speed v, speed of light c, and center frequency f of the first resource" c The Earth radius R and the orbital altitude h of the satellite can be configured by the network device. Optionally, the satellite elevation angle α mentioned above... model "It can be determined by the terminal and reported to the network device, and the satellite elevation angle α..." model The location can be determined by the terminal's location information. Optionally, the location information may include, for example, latitude and longitude information and / or Global Navigation Satellite System (GNSS) positioning information. Optionally, Figure 2C shows a satellite elevation angle α according to an embodiment of this disclosure. model The schematic diagram is shown in Figure 2C. In Figure 2C, α is the satellite elevation angle α. model Specifically, it refers to the angle between the direct path of terminal M and communication satellite S and the tangent line to the Earth with terminal M as the vertex.

[0131] Alternatively, in other embodiments, when the time delay domain dimension M is greater than the time delay domain threshold M... max The dimension N of the Doppler domain is less than or equal to the threshold N of the Doppler domain. maxThis indicates that the time delay domain has a larger dimension than the Doppler domain, or that the time delay domain dimension is an integer multiple of the time delay resolution Δτ, and the Doppler domain dimension is a fractional multiple of the Doppler resolution Δv. Optionally, Figure 2D is a schematic diagram of the protection symbol when the time delay domain dimension is large and the Doppler domain dimensions are small, as shown in an embodiment of this disclosure. As shown in Figure 2D,

[0132] Alternatively, in other embodiments, when the time delay domain dimension M is less than or equal to the time delay domain threshold M max The dimension N of the Doppler domain is greater than the threshold N of the Doppler domain. max This indicates that the time delay domain has a smaller dimension, while the Doppler domain has a larger dimension. Alternatively, it can be described as follows: the time delay domain dimension is a fractional multiple of the time delay resolution Δτ, and the Doppler domain dimension is an integer multiple of the Doppler resolution Δv. or, in, For a detailed description of these parameters, please refer to the above description. Optionally, Figure 2E is a schematic diagram of the protection symbol when the time delay domain dimension is small and the Doppler domain dimensions are large, as shown in an embodiment of this disclosure. As shown in Figure 2E,

[0133] Step 21033, based on and Determine N guard .

[0134] Optionally,

[0135] As can be seen from the above, N can be calculated by performing steps 21031-21033. guard .

[0136] Optionally, in some embodiments, the aforementioned "network device, terminal determine N" guard The method may include: first, having the terminal execute steps 21031-21033 above to calculate N. guard Afterwards, the terminal can send third information to the network device, which is used by the network device to determine N. guard The third piece of information may indicate at least one of the following: the terminal's location information, the terminal's satellite elevation angle, etc. N guardOptionally, the location information may include, for example, latitude and longitude information and / or GNSS positioning information. The location information can be used to determine the satellite elevation angle, and the network device can calculate N based on the satellite elevation angle by performing the above steps 21031-21033. guard .

[0137] Alternatively, in other embodiments, the aforementioned "network device, terminal determine N" guard The method may include: the terminal and network device respectively performing steps 21031-21033 above to calculate N. guard Optionally, the terminal and network devices calculate N. guard The method or formula is the same to ensure that the terminal and network devices are compatible with N. guard The values ​​are interpreted uniformly to ensure communication accuracy.

[0138] Alternatively, in other embodiments, the aforementioned "network device, terminal determine N" guard The method may include: first, having the network device perform steps 21031-21033 above to calculate N. guard Then, the network device can send a fourth piece of information to the terminal, which can be used by the terminal to determine N. guard Optionally, the fourth information may include at least one of the following: the first drawing, N guard In some embodiments, the first pattern can be a pattern of a protection symbol in the first resource DD domain. The first pattern can be one of a plurality of candidate patterns predefined by the protocol, and different candidate patterns can be different patterns of protection symbols in the DD domain.

[0139] Step 2104, network devices and terminals based on The position of the pilot symbol in the DD domain determines the position of the protection symbol in the DD domain.

[0140] Optionally, the position of the pilot symbol in the DD domain can be configured by the network device. In some embodiments, the network device and terminal are based on... The number of REs occupied by the guard symbols on both sides of the pilot symbol in the time delay domain can be determined. Therefore, the number of REs occupied by the guard symbols on each side of the pilot symbol in the time delay domain is: Rounding up or down, and network devices and terminals based on The number of REs occupied by the guard symbols on both sides of the pilot symbol in the Doppler domain can be determined. Therefore, the number of REs occupied by the guard symbols on each side of the pilot symbol in the Doppler domain is: Round up or down. Then, based on the number of REs occupied by the protection symbol on each side of the pilot symbol in the time delay domain and Doppler domain, and the position of the pilot symbol, the position of the protection symbol can be determined.

[0141] Step 2105, Terminal, Network Devices Based on N guard Sure

[0142] Optionally, or, Optionally, M represents the time delay domain dimension of the first resource, and N represents the Doppler domain dimension of the first resource. N represents the number of REs occupied by pilot symbols (e.g., DMRS) in the DD domain. oh Configured by network devices and / or stipulated by protocols, one possible approach is that if higher-layer signaling is not configured with N... oh The agreement stipulates N oh The default value is 0; or, another possible approach is that the protocol directly stipulates N. oh Take a value, for example, take a value of 0; The number of REs occupied by pilot symbols in the DD domain and N guard The sum of, or, Estimate the number of REs required for the channel in the DD domain.

[0143] Optionally, step 2105 may be performed, or it may not be performed.

[0144] Step 2106, Terminal and network devices based on Send or receive signals on the first resource.

[0145] Alternatively, the terminal and network equipment can adopt the following Scheme 1 and Scheme 2 based on Send or receive signals on the first resource.

[0146] Optionally, Scheme 1 may include the following steps 21051a, 21051b, and 21051c:

[0147] Step 21051a: Determine N RE .

[0148] Optionally, N RE It can be used to indicate the number of REs occupied by the first resource in a time slot in the TF domain. Optionally, It can be used to indicate the number of subcarriers included in a resource block (RB) or a resource block group (RBG) of a first resource. It can be used to indicate the number of symbols included in a time slot.

[0149] Step 21051b: Based on N RE Determine the Transport Bock Size (TBS) of the first resource.

[0150] Optionally, based on N RE The method for determining the TBS of the first resource may include the following steps:

[0151] Step 1: Calculate the median number N of the information bits. inf° .

[0152] Optionally, N inf o =N RE ·R·Q m ·υ. Where R represents the terminal's code rate, such as R being the terminal's transmit or receive code rate on the first resource, Q. m This indicates the modulation order of the terminal, and v indicates the final layer number.

[0153] Optionally, the code rate R and modulation order Q m This can be obtained by looking up the DCI Modulation and coding scheme field. In some embodiments, the terminal determines the code rate R and modulation order Q. m The IMCS index can be determined by reading the 5-bit Modulation and Coding Scheme (MCS) field IMCS from the DCI. Figures 2F-2J illustrate the IMCS index in relation to the code rate R and modulation order Q, as shown in embodiments of this disclosure. m The diagram illustrates the correspondence between these parameters. The terminal can determine the code rate R and modulation order Q based on the IMCS index and Figures 2F-2J. m .

[0154] Optionally, in some embodiments, when the first resources are different, the terminal determines the code rate R and the modulation order Q. m The correspondence used also differs. In some embodiments, when the first resource is a PDSCH resource and the terminal's modulation scheme is not qam256, the terminal can determine the code rate R and modulation order Q based on the IMCS index and the correspondence shown in Figure 2F. m When the first resource is a PDSCH resource and the terminal's modulation scheme is QAM256, the terminal can determine the code rate R and modulation order Q based on the IMCS index and the correspondence shown in Figure 2G. mWhen the first resource is a PDSCH resource and the terminal's modulation scheme is qam64LowSE, the terminal can determine the code rate R and modulation order Q based on the IMCS index and the correspondence shown in Figure 2H. m .

[0155] Optionally, when the first resource is PUSCH and transform precoding is disabled, the terminal selects the correspondence in the same way as when the first resource is PDSCH. That is, when the first resource is PUSCH and transform precoding is disabled, if the terminal's modulation scheme is not qam256, the terminal can determine the code rate R and modulation order Q based on the IMCS index and the correspondence shown in Figure 2F. m If the terminal's modulation scheme is QAM256, the terminal can determine the code rate R and modulation order Q based on the IMCS index and the correspondence shown in Figure 2G. m If the terminal's modulation scheme is qam64LowSE, the terminal can determine the code rate R and modulation order Q based on the IMCS index and the correspondence shown in Figure 2H. m .

[0156] Optionally, Figure 2K illustrates an embodiment of this disclosure where, when the first resource is PUSCH and transform precoding is enabled, the terminal determines the IMCS index, code rate R, and modulation order Q. mA schematic diagram illustrating the correspondence between them. Optionally, “5.1.3.1-2” in the last column of MCS Table in Figure 2K is the table shown in Figure 2G, “6.1.4.1-2” is the table shown in Figure 2J, and “6.1.4.1-1” is the table shown in Figure 2I. Optionally, as shown in Figure 2K, when the first resource is PUSCH and Transform Precoding is enabled, if the PUSCH modulation scheme is qam256, and the Radio Network Temporary Identifier (RNTI) used for scrambling the Physical Downlink Control Channel (PDCCH) is either the Cell Radio Network Temporary Identifier (C-RNTI) or the Semi-Persistent Channel State Information Radio Network Temporary Identifier (SP-CSI-RNTI), and the DCI format is 0_1, the terminal can query the code rate R and modulation order Q based on the table shown in Figure 2G. m .

[0157] Step 2, based on N inf° Calculate the TBS of the first resource.

[0158] Optionally, Figure 2L is a schematic diagram illustrating the TBS for calculating the first resource according to an embodiment of this disclosure. Referring to Figure 2L, when N inf° >3824, calculate the TBS of the first resource as follows:

[0159] First calculate N inf° ′, The `round` function is used to round floating-point numbers.

[0160] If R <= 1 / 4, the terminal uses a multi-code block group with LDPC base graph = 2 for encoding.

[0161] If R > 1 / 4, and N inf° When the value is greater than or equal to 8424, the terminal uses a multi-code block group with LDPC base graph = 1 for encoding.

[0162] If R > 1 / 4, and N inf°When the value is less than 8424, the terminal uses a multi-code block group with LDPC base graph = 1 for encoding.

[0163] Optionally, when N inf° ≤3824, the terminal first calculates N inf° ′, Then, the terminal searches a preset table and selects the element closest to N. inf° And not less than N inf° The TBS of ′ is determined as the TBS of the first resource. Optionally, Table 2 is a preset table shown in the embodiments of this disclosure.

[0164] Table 2: N inf° ≤3824

[0165] Step 21051c, based on Rate matching with TBS is performed to send or receive signals on the first resource.

[0166] Optionally, after calculating the TBS of the first resource, the TBS can be mapped to... Rate matching is performed on each RE, where, due to Each RE has had its protection symbols removed. Therefore, the resources used for actual communication after rate matching do not include the resources of protection symbols that do not carry information. This can save resources, improve transmission efficiency, and ensure communication performance.

[0167] Alternatively, in other embodiments, the terminal and network device may also adopt Scheme 2 based on Send or receive signals on the first resource.

[0168] Optionally, Scheme 2 includes the following steps 21051d and 21051e:

[0169] Step 21051d, based on Determine the TBS of the primary resource.

[0170] Optionally, it can be based on Calculate the middle number N of the information bits inf° Based on N inf° Determine the TBS of the primary resource, optionally, Regarding "R, Q" m A detailed introduction to "v" and "based on N" inf° The detailed process for determining the TBS of the first resource can be found in the description of Scheme 1 above.

[0171] Step 21051e: Send or receive signals on the first resource based on TBS.

[0172] Optionally, the terminal may send uplink signals to the network device on the first resource based on the TBS, and the network device may decode the uplink signals based on the TBS. Alternatively, the network device may send downlink signals to the terminal on the first resource based on the TBS, and the terminal may decode the downlink signals based on the TBS.

[0173] The following is an example of an embodiment of this disclosure:

[0174] Assuming the first resource DD domain has a delay domain dimension M = 12 and a Doppler domain dimension N = 14, determined by the satellite's moving speed, the maximum delay in the DD domain, the delay resolution Δτ, and the Doppler resolution Δv. The values ​​are 2 and 4 respectively; single-antenna transmission, and the MCS is configured as Table 5.1.3.1-1: MCS index table 1 for PDSCH's MCS0, with the default RRC higher layer parameter configuration N. oh =0. Therefore, the resource grid pattern of the DD domain can be determined as shown in Figure 2M, and N can be determined. guard The answer is (2+1)*(4+1)-1=14. After that, we can determine... for Or, it can be determined that as well as, Due to N inf o ≤3824. Looking up Table 2, the TBS of this first resource is 40. In this case, the terminal-side behavior includes: for uplink data transmission, the terminal sends uplink data based on the determined TBS; for downlink data transmission, the terminal decodes the downlink channel based on the determined TBS. The network-side behavior may include: for uplink data transmission, the network device decodes the uplink channel based on the determined TBS; for downlink data transmission, the network device sends downlink data based on the determined TBS.

[0175] In summary, the first device will determine the number N of REs occupied by the DD domain protection symbol of the first resource. guard Furthermore, when the first device subsequently sends or receives signals on the first resource, it can be based on N. guardThe signal is sent or received. The protection symbol is used to eliminate mutual interference between pilot symbols and data symbols in the DD domain. This protection symbol can be, for example, a symbol that does not carry information. Therefore, in this embodiment, when the first device communicates on the first resource, it considers the protection symbol that does not carry information to avoid it affecting the communication of the first device. For example, when determining the TBS of the first resource, the first device may not count the number of REs occupied by the protection symbol. This ensures that the TBS determined by the first device does not include the "protection symbol that does not carry information," avoiding the situation where "the determined TBS includes the protection symbol that does not carry information, resulting in resource waste during subsequent communication based on that TBS." Thus, this embodiment can save resources, improve transmission efficiency, and ensure communication performance.

[0176] The communication method involved in the embodiments of this disclosure may include at least one of steps 2101 to 2106. For example, step 2101 may be implemented as a standalone embodiment, and steps 2101+2103+2104 may be implemented as standalone embodiments, but are not limited thereto.

[0177] Optionally, steps 2101 and 2102 can be swapped in order or performed simultaneously.

[0178] Optionally, step 2105 may be performed, or it may not be performed.

[0179] In some embodiments, the steps and their optional implementations in other embodiments described before or after this embodiment, as well as other related parts in the specification, can be referred to, and will not be repeated here.

[0180] Figure 3A is a flowchart illustrating a communication method according to an embodiment of the present disclosure. As shown in Figure 3A, the present disclosure relates to a communication method for a first device, the method comprising:

[0181] Step 3101: Determine N guard .

[0182] Step 3102, based on N guard Send or receive signals on the first resource.

[0183] Optionally, the N guard The number of resource particles (REs) used to indicate the number of protection symbols in the delay-Doppler (DD) domain of the first resource; the protection symbols are used to eliminate mutual interference between pilot symbols and data symbols in the DD domain, and the first resource includes at least one of the following: uplink resources and downlink resources.

[0184] The first device includes a terminal or network device.

[0185] Optionally, the determination of N guard ,include:

[0186] The delay resolution Δτ and the Doppler resolution Δv of the DD domain are determined based on at least one of the delay domain dimension M, the Doppler domain dimension N, the parameter μ, and the cyclic prefix CP type of the first resource; wherein, μ is used to indicate the subcarrier spacing of the first resource;

[0187] Based on the maximum delay in the DD domain max At least one of the time delay domain dimension M and the time delay resolution Δτ is determined. The Used to indicate the number of REs occupied by the guard symbols on both sides of the pilot symbol in the time delay domain;

[0188] Determined based on at least one of the satellite moving speed v, the Doppler domain dimension N, and the Doppler resolution Δv. The Used to indicate the number of REs occupied by the guard symbols on both sides of the pilot symbol in the Doppler domain;

[0189] Based on the above and stated Determine the N guard The

[0190] Optionally, the determination of N guard ,include:

[0191] The time delay domain dimension M is greater than the time delay domain threshold M. max The dimension N of the Doppler domain is greater than the threshold N of the Doppler domain. max The The Or, the aforementioned Among them, the The c is the speed of light, f c Let R be the center frequency of the first resource, R be the Earth's radius, h be the orbital altitude of the satellite, and α be the center frequency of the first resource. model This refers to the satellite elevation angle of the terminal.

[0192] Optionally, the determination of N guard ,include:

[0193] The time delay domain dimension M is greater than the time delay domain threshold M. max The Doppler domain dimension N is less than or equal to the Doppler domain threshold N. max The The

[0194] Optionally, the determination of N guard ,include:

[0195] The time delay domain dimension M is less than or equal to the time delay domain threshold M. max The dimension N of the Doppler domain is greater than the threshold N of the Doppler domain. max The The Or, the aforementioned Among them, the The c is the speed of light, f c Let R be the center frequency of the first resource, R be the Earth's radius, h be the orbital altitude of the satellite, and α be the center frequency of the first resource. model This refers to the satellite elevation angle of the terminal.

[0196] Optionally, the N-based guard Sending or receiving signals on the first resource includes:

[0197] Based on the N guard Sure The or, Where M is the time delay domain dimension of the first resource, and N is the Doppler domain dimension of the first resource. N represents the number of REs occupied by pilot symbols in the DD domain. oh Configured by network devices and / or as agreed by protocols, The number of REs occupied by pilot symbols in the DD domain and N guard sum;

[0198] Based on the above Send or receive signals on the first resource.

[0199] Optionally, the one based on the Sending or receiving signals on the first resource includes:

[0200] Determine N RE The N RE Used to indicate the number of REs occupied by the first resource in a time slot in the time-frequency TF domain. The Used to indicate the number of subcarriers included within a resource block (RB), the Used to indicate the number of symbols included in a time slot;

[0201] Based on the N RE Determine the transport block size (TBS) of the first resource;

[0202] Based on the above Rate matching is performed with the TBS to transmit or receive signals on the first resource.

[0203] Optionally, the one based on the Sending or receiving signals on the first resource includes:

[0204] Based on the above Determine the TBS of the first resource;

[0205] Based on the TBS, signals are sent or received on the first resource.

[0206] Optionally, the method further includes:

[0207] Based on the above The The position of the pilot symbol in the DD domain determines the position of the protection symbol in the DD domain.

[0208] Optionally, the maximum delay l of the DD domain max Based on the maximum delay spread and the first delay determination, the first delay includes the maximum delay of the non-terrestrial network NTN channel, the first delay and the maximum delay spread are agreed by the protocol, and / or the first delay and the maximum delay spread are configured by the network device.

[0209] Optionally, the first device includes a terminal, and the method further includes at least one of the following:

[0210] The system receives first information sent by a network device and determines the delay domain dimension M and the Doppler domain dimension N based on the first information; wherein the first information is used to indicate the number of subcarriers and the number of time domain symbols of the first resource in the TF domain.

[0211] The system receives second information sent by a network device, the second information being used to indicate the delay domain dimension M and the Doppler domain dimension N.

[0212] Optionally, the first device includes a terminal, and the method further includes:

[0213] Send a third piece of information to the network device, the third piece of information being used by the network device to determine the N. guard .

[0214] Optionally, the first device includes a terminal, wherein the determination of N guard ,include:

[0215] The terminal receives a fourth piece of information sent by the network device; the fourth piece of information is used by the terminal to determine the N. guard;

[0216] Based on the fourth information, determine N. guard .

[0217] Optionally, the first device includes a network device, and the method further includes at least one of the following:

[0218] Send first information to the terminal, the first information being used to determine the time delay domain dimension M and the Doppler domain dimension N; the first information indicating the number of subcarriers and the number of time domain symbols of the first resource in the TF domain;

[0219] Send a second message to the terminal, the second message being used to indicate the time delay domain dimension M and the Doppler domain dimension N.

[0220] Optionally, the first device includes a network device, wherein the determination of N guard include:

[0221] The receiving terminal sends third information, which is used by the network device to determine the N. guard ;

[0222] Based on the third information, determine N. guard .

[0223] Optionally, the first device includes a network device, and the method further includes:

[0224] Send a fourth piece of information to the terminal; the fourth piece of information is used by the terminal to determine the N. guard .

[0225] Optionally, the third information includes at least one of the following: the location information of the terminal, the satellite elevation angle of the terminal, N guard The location information is used to determine the satellite elevation angle.

[0226] Optionally, the fourth information includes at least one of the following: a first pattern, N guard Wherein, the first pattern is the pattern of the protection symbol in the first resource DD domain.

[0227] For a detailed description of steps 3101-3102, please refer to the above embodiment description.

[0228] In some embodiments, the steps and their optional implementations in other embodiments described before or after this embodiment, as well as other related parts in the specification, can be referred to, and will not be repeated here.

[0229] The following is an exemplary description of the above method:

[0230] Optionally, the high mobility characteristics of NTN systems lead to complex and variable channel conditions, such as rapid changes in Doppler frequency offset and time-varying channels. In time-varying channels, especially in high-speed mobile environments, traditional OFDM and DFT-s-OFDM often encounter inter-symbol interference (ISI) and inter-carrier interference (ICI). OFDM is prone to ICI under Doppler frequency offset, and in rapidly fading channels, signal energy tends to concentrate on certain subcarriers, leading to performance degradation. OTFS, by mapping the signal to a two-dimensional time-frequency space for modulation, can effectively suppress the effects of frequency offset and channel fading, exhibiting significant advantages in dealing with Doppler frequency offset and time-varying channels, thereby improving system performance, especially in high-dynamic environments.

[0231] The main channels involved may include: PDSCH, PUSCH, etc.

[0232] The principle of OTFS

[0233] Resource Grid

[0234] The OTFS system involves two resource grids: the DD domain resource grid and the TF domain resource grid, and the conversion between them. Assume that in the OTFS system, the system bandwidth is B = MΔf, and the sampling frequency is... The system frame duration is T f =NMT S =NT, and the channel has P paths, indicating that the channel is underspread.

[0235] The following section will elaborate on the two resource grids and their transformation.

[0236] TF domain resource grid Λ Λ={(lΔf,kT),l=0,...,M-1;k=0,...,N-1}

[0237] DD domain resource grid Γ

[0238] Optionally, Figure 3B is a schematic diagram of the mutual conversion between DD domain and TF domain resource grids provided in an embodiment of this disclosure.

[0239] As shown in Figure 3B, DD->TF: Perform an M-point FFT along the time delay domain and an N-point IFFT along the Doppler domain;

[0240] TF->DD: Perform an M-point IFFT along the frequency domain and an N-point FFT along the time domain.

[0241] Optionally, Figure 3C is a schematic diagram of basic modulation and demodulation provided in an embodiment of this disclosure.

[0242] QAM modulation Α Α={a1,...,a Q}

[0243] DD domain mapping

[0244] NM modulation symbols A are mapped to the DD domain resource grid, represented as the DD domain matrix X. dd [m,n].

[0245] DD->TF(ISFFT)

[0246] DD Domain Resource Grid X dd [m,n] is converted to a TF domain resource grid X using ISFFT. tf [l,k].

[0247] TF -> Time Domain Signal (Heisenberg Transform)

[0248] The TF domain signal is converted into a time domain signal s(t) through the Heisenberg transform. The Heisenberg transform refers to performing an M-point IFFT transform on the TF domain signal according to its frequency, and then passing it through a shaping filter g. tx (t).

[0249] Through Channel

[0250] The received signal r(t) after the time-domain signal s(t) passes through the DD domain channel h(τ,v) can be:

[0251] Assuming at the receiving end with Sampling is performed, i.e., r(t) in Samples are taken at points q = 0, 1, ..., MN-1. Simultaneously, the time delay variable τ is... Discretization is then performed. Discrete equivalent baseband signal is

[0252] in,

[0253] When l∈L, that is, when the discretized delay component at the receiver equals the actual delay of the channel, the above can be simplified to

[0254] The input and output over discrete time delay can be simplified to

[0255] Time-domain received signal -> TF domain (Wigner transform)

[0256] The Wigner transform, which includes matched filtering and sampling, converts the time-domain receiver signal into a TF-domain resource grid.

[0257] Perform matched filtering on the received signal:

[0258] Sample Y tf [l,k]=Y(f,t)|f=lΔf,t=kT

[0259] TF domain -> DD domain

[0260] Channel estimation based on embedded pilots

[0261] In the OTFS system, each symbol in the DD domain is extended to the entire TF domain through the ISFFT transformation. That is, each symbol in the DD domain will experience the complete channel. Therefore, a single pilot symbol in the DD domain can be used for channel estimation.

[0262] Assume the pilot signal is located at position X in the DD domain. dd [m p ,n p The placement of pilots, guard intervals, and data in the DD domain is as follows: [A guard interval is placed around the pilot.]

[0263] Optionally, Figure 3D is a schematic diagram of a DD domain resource grid provided in an embodiment of this disclosure.

[0264] Alternatively, a ZP-OTFS frame structure can be used to store m p +l i and n p +k i Substituting m and n respectively, we can obtain the following based on the input-output relationship of ZP-OTFS:

[0265] Based on the threshold determination method, the Doppler effect and time delay are derived according to the coordinate relationship between the target symbol (i.e., the DD domain symbol determined to be the channel response by the threshold) and the pilot symbol, and the estimated value of the channel response amplitude gain is...

[0266] Generally speaking, Υ = 3σ p , σ p This represents the standard deviation of the pilot power.

[0267] 1.1 PDSCH / PUSCH TBS Calculation:

[0268] Before the UE calculates the TBS, it needs to determine the number of codewords to be used.

[0269] If the upper-layer parameter maxNrofCodeWordsScheduledByDCI=2, it means that two codeword transmissions are enabled. If IMCS=26 and rid=1 in one of the transport blocks in DCI format 1_1, then one of the two transport blocks is disabled.

[0270] If both transport blocks are enabled, transport blocks 1 and 2 are mapped to codewords 0 and 1, respectively. If only one transport block is enabled, the enabled transport block is always mapped to the first codeword.

[0271] The steps for UE to calculate TBS are as follows:

[0272] Step 1: Calculate the number of available REs (N) for PDSCH / PUSCH in the time slot. RE This is related to the time-frequency resources allocated to PDSCH in DCI, DMRS configuration, and the higher-layer parameter xOverhead.

[0273] a. Calculate the RE number N′ on one PRB within one time slot. RE

[0274] b. Calculate the total number of REs N allocated to PDSCH / PUSCH based on the number of PRBs NPRPRBB allocated to PDSCH / PUSCH. RE

[0275] pass Determine the number of REs allocated to PDSCH / PUSCH in a single PRB. It is the number of subcarriers in the PRB;

[0276] It is the number of symbols allocated to PDSCH / PUSCH in the slot.

[0277] This is the number of REs for DM-RS in each PRB during the scheduling period, including the overhead of DM-RS CDM groups without data, indicated by DCI format 1_1, 1_2, or 1_3 or DCI format 1_0.

[0278] This is the overhead configured by the high-level parameter xOverhead in PDSCH-ServingCellConfig. If xOverhead (with a value of 6, 12, or 18) is not configured in PDSCH-ServingCellConfig, it is configured to 0. It is also configured to 0 if PDSCH is scheduled by PUCCH with CRC scrambling by SI-RNTI, RA-RNTI, MSGB-RNTI, or P-RNTI, N-oh-PRB.

[0279] Through N RE =min(156,N′) RE ).n PRB Determine the total number of REs allocated to PDSCH / PUSCH, where n PRB It is the total number of PRBs

[0280] Step 2: Calculate the median number N of the information bits. inf。 The modulation scheme and code rate are obtained by looking up the DCI Modulation and coding scheme field, and the number of layers is obtained by configuring the Antenna port(s) and DMRS. inf o =N RE ·R·Q m ·υ

[0281] Determining the modulation method and bit rate:

[0282] Read the 5-bit MCS field IMCS on the DCI to determine the modulation order and target code rate. Read the redundancy version field on the DCI to determine the redundancy version RV.

[0283] The NR defines five MCS tables, as shown in Figure 2F-2J. The UE queries Figure 2F-2J based on the IMCS index to obtain the modulation order and target code rate.

[0284] In PUSCH, when transform precoding is not enabled, the MCS index table used is the same as that used in PDSCH. When transform precoding is enabled, the MCS index table used is shown in Figure 2K.

[0285] Step 3: Based on N inf。 Determine the TBS calculation method

[0286] The TBS size requires byte synchronization, so quantization is used to ensure that the payload bytes are synchronized (in multiples of 8) and that the CB length is equal.

[0287] a. When N inf o >3824, TBS is calculated as follows:

[0288] Calculate the intermediate information bits N′ of the quantization info

[0289] If R <= 1 / 4 (multi-code block group with LDPC graph = 2), TBS is as shown in the figure above.

[0290] If R > R > 1 / 1 / 4, and N′ info >8424 (LDPC graph = 1 multi-code block group), TBS is shown in Figure 2L above.

[0291] If R > 1 / 4, and N′ info >8424((single code block group with LDPC graph = 1), TBS is shown in Figure 2F above.

[0292] b. When N inf o If <= 3824, calculate TBS as follows:

[0293] Calculate the intermediate information bits N′ of the quantization info

[0294] Refer to Table 2 above to find the closest value that is not less than N′. info TBS

[0295] Optionally, in high-speed scenarios, OTFS effectively suppresses the effects of frequency offset and channel fading by mapping the signal to a two-dimensional time-frequency space for modulation. At the receiver, channel estimation based on embedded pilots reserves guard symbols (blank symbols, i.e., nothing is transmitted) in the DD domain to eliminate mutual interference between pilot and data symbols. However, the reserved guard symbols affect the determination of TBS; therefore, the TBS determination scheme for OTFS systems based on embedded pilots requires further clarification.

[0296] This disclosure provides a method including the following:

[0297] Optional Example 1: The TBS can be determined based on either DD domain resources or TF domain resources. The specific determination method is as follows:

[0298] Method 1: Determine TBS based on TF domain resources

[0299] Step 1: Calculate the total number of REs allocated to PDSCH / PUSCH within a time slot in the TF domain, i.e. Among them,

[0300] The data in each RE in the TF domain contains all components of the DD domain resource grid.

[0301] Step 2: Calculate the median number N of the information bits. inf o Further based on the median number N of the information bits inf o Determine the TBS for transmission, where N inf o =N RE ·R·Q m ·υ.

[0302] Optional Example 2: Consider the number of available DD domain resources allocated to PDSCH / PUSCH within the DD domain. Perform rate matching. The number of available DD domain resources allocated to PDSCH / PUSCH in the DD domain mentioned above. This refers to the total number of available DD domain resources after removing other overheads (such as DMRS, guard intervals, etc.).

[0303] Method 2: Determine TBS based on DD domain resources

[0304] Step 1: Calculate the number of available DD domain resources allocated to PDSCH / PUSCH in the DD domain.

[0305] Step 2: Calculate the median number N of the information bits. inf o Further based on the median number N of the information bits inf o Determine the TBS for transmission, where

[0306] Optional Example 3: Based on Points 1 and 2, the number of available DD domain resources allocated to PDSCH / PUSCH in the DD domain. It can be determined in at least one of the following ways:

[0307] Method 1: It can be calculated using the following formula

[0308] Where N and M refer to the dimensions of the Doppler axis and time delay axis of the DD domain resource grid, respectively. DMRS This refers to the number of DD REs occupied by DMRS in the DD domain; N guard This refers to the number of DD REs occupied by the protection symbols in the DD field; N oh The number of DD REs is determined based on higher-layer configuration parameters and / or protocol stipulations. One possible approach is that if the higher-layer signaling does not configure this parameter, the protocol stipulates a default value of 0; alternatively, the protocol directly stipulates its value, for example, a value of 0. The DD RE refers to a small transport grid within the DD domain resource grid.

[0309] Method 2: Redefine N DMRS This refers to the number of DD REs required for channel estimation in the DD domain, specifically the number of DD REs occupied by DMRS and protection symbols in the DD domain. It can be calculated using the following formula

[0310] Optional Example 4: Based on point 3, the number of DD REs occupied by the protected symbols in the DD field can be determined in at least one of the following ways:

[0311] Case 1: Integer multiple delay and integer multiple Doppler scenarios. If the delay resolution and Doppler resolution are high enough, then the delay and Doppler frequency shift of all transmission paths can be considered to be integer multiples of the delay resolution and Doppler resolution, respectively (i.e., there are non-integer multiple cases, but they can still be approximated as integer multiples).

[0312] Method 1: The number of DD REs occupied by the protected symbols in the DD domain is roughly estimated by the maximum Doppler frequency shift f based on the satellite's moving speed v. dmax (The coarsely estimated maximum Doppler frequency shift does not consider the influence of the angle between the direction of motion and the propagation path), maximum time delay l max The Doppler resolution Δv and the time delay resolution Δτ are determined.

[0313] Delay Domain: In the delay domain, the number of DD REs occupied by the protection symbols is

[0314] Doppler domain: The maximum Doppler frequency shift, roughly estimated by the satellite's moving velocity v, is In the Doppler field, the number of DD REs occupied by the protection symbol is

[0315] Method 2: The number of DD REs occupied by the protection symbols in the DD domain is determined by the Doppler frequency offset f, which is determined by the satellite's moving speed v. d Maximum delay l max The Doppler resolution Δv and the time delay resolution Δτ are determined.

[0316] Delay Domain: In the delay domain, the number of DD REs occupied by the protection symbols is

[0317] Doppler domain: The Doppler frequency offset determined by the satellite's moving velocity v is Where R refers to the Earth's radius, h refers to the orbital altitude, and α... model This refers to the satellite elevation angle. In the Doppler domain, the number of DD REs occupied by the protection symbols is...

[0318] Case 2: Integer multiple delay and fractional multiple Doppler scenarios. When the delay resolution is large enough, the delay of all transmission paths can be approximated as an integer multiple of the delay resolution. However, when the Doppler resolution is not large enough, the Doppler frequency shift of the transmission path cannot be approximated as an integer multiple of the Doppler resolution.

[0319] The number of DD REs occupied by the protection symbols in the DD domain is determined by the maximum delay l. max The time delay resolution Δτ and the size of the Doppler dimension N of the resource grid in the DD domain.

[0320] Delay Domain: In the delay domain, the number of DD REs occupied by the protection symbols is

[0321] Doppler field: In the Doppler field, the number of DD REs occupied by the protection symbol is

[0322] Case 3: Integer multiple and Doppler fractional multiple delay scenarios. If the Doppler resolution is large enough, the Doppler frequency shift of all transmission paths can be approximated as an integer multiple of the Doppler resolution. However, if the delay resolution is not large enough, the delay of the transmission path cannot be approximated as an integer multiple of the delay resolution.

[0323] Method 1: The number of DD REs occupied by the protected symbols in the DD domain is roughly estimated by the maximum Doppler frequency shift f based on the satellite's moving speed v. dmax (The coarsely estimated maximum Doppler frequency shift does not consider the influence of the angle between the direction of motion and the propagation path), the Doppler resolution Δv, and the size of the time delay dimension M in the DD domain resource grid.

[0324] Delay Domain: In the delay domain, the number of DD REs occupied by the protection symbols is

[0325] Doppler domain: The maximum Doppler frequency shift, roughly estimated by the satellite's moving velocity v, is In the Doppler field, the number of DD REs occupied by the protection symbol is

[0326] Method 2: The number of DD REs occupied by the protection symbols in the DD domain is determined by the Doppler frequency offset f, which is determined by the satellite's moving speed v. d The Doppler resolution Δv and the size of the time delay dimension M of the resource grid in the DD domain are determined.

[0327] Delay Domain: In the delay domain, the number of DD REs occupied by the protection symbols is

[0328] Doppler domain: The Doppler frequency offset determined by the satellite's moving velocity v is Where R refers to the Earth's radius, h refers to the orbital altitude, and α... model This refers to the satellite elevation angle. In the Doppler domain, the number of DD REs occupied by the protection symbols is...

[0329] The number of DD REs occupied by the protection symbol in the DD field is

[0330] Optionally: When the time delay resolution and / or Doppler resolution is sufficiently large, the time delay and / or Doppler frequency shift of all transmission paths can be approximated as integer multiples of the time delay resolution and Doppler resolution, respectively. To ensure that pilot symbols and data symbols do not cause interference, the DD RE number occupied by the protection symbols is rounded up to approximate the time delay and / or Doppler as integer multiples of the time delay resolution and Doppler resolution.

[0331] Optionally: The above satellite elevation angle α model As shown in the figure below, α in Figure 2C refers to the angle between the direct path of the terminal M and the satellite S and the tangent line to the Earth with the terminal as the vertex.

[0332] Optional Example 4-1: The Doppler resolution Δv and the time delay resolution Δτ can be determined by at least one of the following methods:

[0333] Method 1: The terminal implicitly determines the delay domain dimension M and Doppler dimension N of the DD domain resource grid based on the number of subcarriers and the number of time domain symbols indicated by the gNB. Then, based on the μ and CP types configured by the higher-layer parameters subcarrierSpacing and cyclicPrefix respectively, it further determines the Doppler resolution Δv and delay resolution Δτ according to the protocol predefined table.

[0334] Method 2: The terminal directly indicates the delay domain dimension M and Doppler dimension N of the DD domain resource grid based on the gNB, and then further determines the Doppler resolution Δv and delay resolution Δτ based on the μ and CP types configured by the higher-level parameters subcarrierSpacing and cyclicPrefix respectively, according to the protocol predefined table.

[0335] The protocol predefined table used to determine the plethysmographic resolution Δv and the time delay resolution Δτ can specifically refer to Table 1 mentioned above.

[0336] Optionally: For SCS = 60kHz, there are normal cyclic prefixes and extended cyclic prefixes. For the normal cyclic prefix, each slot consists of 14 symbols, each with a duration of [duration missing]. Doppler resolution is For the extended cyclic prefix, each slot consists of 12 symbols, each with a duration of [duration missing]. Doppler resolution is

[0337] Optional Example 4-2: The terminal determines the number of DD REs occupied by the protection symbol in the DD domain based on the specific scenario described in Point 4 (such as case 1, case 2, or case 3). The terminal may consider using the following methods to determine the specific applicable scenario and the location of the protection symbol:

[0338] The terminal uses the DMRS location in the DD domain resource grid indicated by the gNB and the number of DD REs occupied by the protection symbols in the DD domain (including in the delay domain dimension). and in Doppler dimensions Determine the location of the protected symbol.

[0339] Base station behavior:

[0340] Step 1: gNB uses the predefined Doppler domain threshold N based on the protocol. max and time delay domain threshold M max This, along with the Doppler domain dimension N and the time delay domain dimension M, are used to instruct the terminal to determine the specific applicable scenario. For example, assuming N>N max If the Doppler resolution is sufficiently large, the Doppler frequency shift of all transmission paths can be approximated as an integer multiple of the Doppler resolution; otherwise, it cannot be approximated as an integer multiple. M>M max If the latency resolution is large enough, the latency of all transmission paths can be approximated as an integer multiple of the latency resolution; otherwise, it cannot be approximated as an integer multiple.

[0341] Step 2: Based on Step 1, gNB determines the number of DD REs occupied by the protection symbols in the Doppler dimension. Optionally, the base station can determine the number of DD REs occupied in the doppler dimension based on information reported by the terminal, such as GNSS information, satellite elevation angle, etc. The number of DD REs occupied by the protection symbols in the delay domain dimension is determined based on the maximum delay of the NTN channel predefined in the protocol and the maximum delay spread indicated to the terminal.

[0342] Step 3: Based on the determination in Step 2 and The number of DD REs occupied by the protected symbols in the DD field is calculated.

[0343] 1. The UE determines the DD guard resources and instructs the base station.

[0344] a) Terminal determines RS

[0345] 2. Both parties shall determine based on the pre-set terms of the agreement.

[0346] a) The terminal can determine the parameters of the guard resources, and the base station can also obtain them. Both parties determine the guard resources according to the preset method in the protocol (such as a formula).

[0347] 3. Once the base station is identified, it is instructed to the terminal.

[0348] a) One approach is to indicate the pattern

[0349] (1) The indicated pattern is one of several candidate patterns preset in the protocol.

[0350] b) One approach is to indicate the calculated N_delay_RE, etc.

[0351] Example: Assume that the dimension M of the delay domain in the DD domain resource grid is 12, and the dimension N of the Doppler domain is 14. The number of DD REs occupied by the protection symbols in the delay domain and the Doppler domain, determined by the terminal's moving speed, maximum delay, Doppler resolution, and delay resolution, are 2 and 4 respectively; single-antenna transmission, and the MCS is configured as Table 5.1.3.1-1: MCS index table 1 for PDSCH's MCS0, with the default RRC higher-layer parameter configuration N. oh =0.

[0352] Step 1: Determine the DD domain resource grid pattern based on background technology.

[0353] Step 2: Based on point 4, determine the number of DD REs occupied by the protection symbol as (2+1)*(4+1)-1=14.

[0354] Step 3: Based on point 3, determine the number of available resources allocated to PDSCH / PUSCH in the DD domain. If determined based on method 1, then it is

[0355] If determined based on method 2, then it is

[0356] Step 4: Based on point 1, method two can be determined. Due to N inf o ≤3824, according to the protocol predefined Table 5.1.3.2-1: TBS for N inf o ≤3824. According to the table, the TBS of this OTFS frame is 40.

[0357] Key Point 5: Terminal-side behavior: For uplink data transmission, the terminal generates the TBS based on the TBS determined in Key Points 1-4; for downlink data transmission, the terminal decodes the downlink channel based on the TBS determined in Key Points 1-4.

[0358] Base station side behavior: For uplink data transmission, the terminal performs uplink channel decoding based on the TBS determined in points 1-4; for downlink data transmission, the terminal generates the TBS based on the TBS determined in points 1-4.

[0359] Optionally, this scheme takes into account reserved protection symbols for eliminating interference between pilot symbols and data symbols, and proposes a TBS determination scheme for an OTFS system based on embedded pilots.

[0360] This disclosure also proposes an apparatus (also referred to as a communication device, etc.) for implementing any of the above methods. For example, an apparatus is proposed that includes units or modules for implementing the steps performed by the terminal in any of the above methods. Furthermore, another apparatus is proposed that includes units or modules for implementing the steps performed by a network device (e.g., an access network device, a core network functional node, a core network device, etc.) in any of the above methods.

[0361] It should be understood that the division of units or modules in the above device is only a logical functional division. In actual implementation, they can be fully or partially integrated into a single physical entity, or they can be physically separated. Furthermore, the units or modules in the device can be implemented by a processor calling software: for example, the device includes a processor connected to a memory containing instructions. The processor calls the instructions stored in the memory to implement any of the above methods or to implement the functions of the units or modules in the above device. The processor can be, for example, a general-purpose processor, such as a Central Processing Unit (CPU) or a microprocessor, and the memory can be internal or external to the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits. The functionality of some or all of the units or modules can be achieved through the design of these hardware circuits, which can be understood as one or more processors. For example, in one implementation, the hardware circuit is an application-specific integrated circuit (ASIC). The functionality of some or all of the units or modules is achieved through the design of the logical relationships between the components within the circuit. In another implementation, the hardware circuit can be implemented using a programmable logic device (PLD). Taking a field-programmable gate array (FPGA) as an example, it can include a large number of logic gates. The connection relationships between the logic gates are configured through configuration files, thereby achieving the functionality of some or all of the units or modules. All units or modules of the above device can be implemented entirely through processor-called software, entirely through hardware circuits, or partially through processor-called software with the remaining parts implemented through hardware circuits.

[0362] In this embodiment, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction read and execute capabilities, such as a Central Processing Unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationships of hardware circuits. The logical relationships of the aforementioned hardware circuits are fixed or reconfigurable. For example, the processor is a hardware circuit implemented using an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and configuring the hardware circuit can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. Furthermore, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a Neural Network Processing Unit (NPU), a Tensor Processing Unit (TPU), or a Deep Learning Processing Unit (DPU).

[0363] Figure 4 is a schematic diagram of the structure of a first device according to an embodiment of this disclosure. The first device is used to perform any of the above methods. In some embodiments, as shown in Figure 4, the first device may include at least one of a transceiver module, a processing module, etc. The processing module is used to determine N. guard The N guard The number of resource particles (REs) used to indicate the number of protection symbols occupied by the protection symbols in the delay-Doppler (DD) domain of the first resource; the protection symbols are used to eliminate mutual interference between pilot symbols and data symbols in the DD domain; the first resource includes at least one of the following: uplink resources and downlink resources; a transceiver module is used to indicate the number of resource particles (REs) .... guard Send or receive signals on the first resource.

[0364] Optionally, the transceiver module is used to perform at least one of the communication steps such as sending and / or receiving performed by the first device in any of the above methods, which will not be elaborated here. Optionally, the processing module is used to perform at least one of the other steps performed by the first device in any of the above methods, which will not be elaborated here.

[0365] Optionally, the first device may include a terminal or a network device.

[0366] Optionally, the determination of N guard ,include:

[0367] The delay resolution Δτ and the Doppler resolution Δv of the DD domain are determined based on at least one of the delay domain dimension M, the Doppler domain dimension N, the parameter μ, and the cyclic prefix CP type of the first resource; wherein, μ is used to indicate the subcarrier spacing of the first resource;

[0368] Based on the maximum delay in the DD domain max At least one of the time delay domain dimension M and the time delay resolution Δτ is determined. The Used to indicate the number of REs occupied by the guard symbols on both sides of the pilot symbol in the time delay domain;

[0369] Determined based on at least one of the satellite moving speed v, the Doppler domain dimension N, and the Doppler resolution Δv. The Used to indicate the number of REs occupied by the guard symbols on both sides of the pilot symbol in the Doppler domain;

[0370] Based on the above and stated Determine the N guard The

[0371] Optionally, the determination of N guard ,include:

[0372] The time delay domain dimension M is greater than the time delay domain threshold M. max The dimension N of the Doppler domain is greater than the threshold N of the Doppler domain. max The The Or, the aforementioned Among them, the The c is the speed of light, f c Let R be the center frequency of the first resource, R be the Earth's radius, h be the orbital altitude of the satellite, and α be the center frequency of the first resource. model This refers to the satellite elevation angle of the terminal.

[0373] Optionally, the determination of N guard ,include:

[0374] The time delay domain dimension M is greater than the time delay domain threshold M. maxThe Doppler domain dimension N is less than or equal to the Doppler domain threshold N. max The The

[0375] Optionally, the determination of N guard ,include:

[0376] The time delay domain dimension M is less than or equal to the time delay domain threshold M. max The dimension N of the Doppler domain is greater than the threshold N of the Doppler domain. max The The Or, the aforementioned Among them, the The c is the speed of light, f c Let R be the center frequency of the first resource, R be the Earth's radius, h be the orbital altitude of the satellite, and α be the center frequency of the first resource. model This refers to the satellite elevation angle of the terminal.

[0377] Optionally, the N-based guard Sending or receiving signals on the first resource includes:

[0378] Based on the N guard Sure The or, Where M is the time delay domain dimension of the first resource, and N is the Doppler domain dimension of the first resource. N represents the number of REs occupied by pilot symbols in the DD domain. oh Configured by network devices and / or as agreed by protocols, The number of REs occupied by pilot symbols in the DD domain and N guard sum;

[0379] Based on the above Send or receive signals on the first resource.

[0380] Optionally, the one based on the Sending or receiving signals on the first resource includes:

[0381] Determine N RE The N RE Used to indicate the number of REs occupied by the first resource in a time slot in the time-frequency TF domain. The Used to indicate the number of subcarriers included within a resource block (RB), the Used to indicate the number of symbols included in a time slot;

[0382] Based on the N RE Determine the transport block size (TBS) of the first resource;

[0383] Based on the above Rate matching is performed with the TBS to transmit or receive signals on the first resource.

[0384] Optionally, the one based on the Sending or receiving signals on the first resource includes:

[0385] Based on the above Determine the TBS of the first resource;

[0386] Based on the TBS, signals are sent or received on the first resource.

[0387] Optionally, the method further includes:

[0388] Based on the above The The position of the pilot symbol in the DD domain determines the position of the protection symbol in the DD domain.

[0389] Optionally, the maximum delay l of the DD domain max Based on the maximum delay spread and the first delay determination, the first delay includes the maximum delay of the non-terrestrial network NTN channel, the first delay and the maximum delay spread are agreed by the protocol, and / or the first delay and the maximum delay spread are configured by the network device.

[0390] Optionally, the first device includes a terminal, and the method further includes at least one of the following:

[0391] The system receives first information sent by a network device and determines the delay domain dimension M and the Doppler domain dimension N based on the first information; wherein the first information is used to indicate the number of subcarriers and the number of time domain symbols of the first resource in the TF domain.

[0392] The system receives second information sent by a network device, the second information being used to indicate the delay domain dimension M and the Doppler domain dimension N.

[0393] Optionally, the first device includes a terminal, and the method further includes:

[0394] Send a third piece of information to the network device, the third piece of information being used by the network device to determine the N. guard .

[0395] Optionally, the first device includes a terminal, wherein the determination of N guard ,include:

[0396] The terminal receives a fourth piece of information sent by the network device; the fourth piece of information is used by the terminal to determine the N. guard ;

[0397] Based on the fourth information, determine N. guard .

[0398] Optionally, the first device includes a network device, and the method further includes at least one of the following:

[0399] Send first information to the terminal, the first information being used to determine the time delay domain dimension M and the Doppler domain dimension N; the first information indicating the number of subcarriers and the number of time domain symbols of the first resource in the TF domain;

[0400] Send a second message to the terminal, the second message being used to indicate the time delay domain dimension M and the Doppler domain dimension N.

[0401] Optionally, the first device includes a network device, wherein the determination of N guard include:

[0402] The receiving terminal sends third information, which is used by the network device to determine the N. guard ;

[0403] Based on the third information, determine N. guard .

[0404] Optionally, the first device includes a network device, and the method further includes:

[0405] Send a fourth piece of information to the terminal; the fourth piece of information is used by the terminal to determine the N. guard .

[0406] Optionally, the third information includes at least one of the following: the location information of the terminal, the satellite elevation angle of the terminal, N guard The location information is used to determine the satellite elevation angle.

[0407] 19. The method as described in claim 14 or 17, wherein the fourth information includes at least one of the following: a first pattern, N guard Wherein, the first pattern is the pattern of the protection symbol in the first resource DD domain.

[0408] Figure 5A is a schematic diagram of the structure of the communication device 5100 proposed in an embodiment of this disclosure. The communication device 5100 can be a network device (e.g., access network device, core network device, etc.), a terminal (e.g., user equipment, etc.), a chip, chip system, or processor that supports the network device in implementing any of the above methods, or a chip, chip system, or processor that supports the terminal in implementing any of the above methods. The communication device 5100 can be used to implement the methods described in the above method embodiments; for details, please refer to the descriptions in the above method embodiments.

[0409] As shown in Figure 5A, the communication device 5100 is used to execute any of the above methods. In some embodiments, the communication device 5100 includes one or more processors 5101. The processor 5101 may be a general-purpose processor or a special-purpose processor, such as a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, and the central processing unit may be used to control communication devices (e.g., base stations, baseband chips, terminal devices, terminal device chips, DUs or CUs, etc.), execute programs, and process program data. Optionally, the communication device 5100 is used to execute any of the above methods. Optionally, one or more processors 5101 are used to invoke instructions to cause the communication device 5100 to execute any of the above methods.

[0410] In some embodiments, the communication device 5100 further includes one or more transceivers 5102. When the communication device 5100 includes one or more transceivers 5102, the transceiver 5102 performs at least one of the communication steps such as sending and / or receiving in the above-described method, and the processor 5101 performs at least one of the other steps. In optional embodiments, the transceiver may include a receiver and / or a transmitter, which may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, transceiver circuit, interface circuit, interface, etc., can be used interchangeably; the terms transmitter, transmitting unit, transmitter, transmitting circuit, etc., can be used interchangeably; the terms receiver, receiving unit, receiver, receiving circuit, etc., can be used interchangeably.

[0411] In some embodiments, the communication device 5100 further includes one or more memories 5103 for storing data and / or instructions. Optionally, one or more processors 5101 are used to invoke instructions stored in the memory 5103 to cause the communication device 5100 to perform any of the above methods. Optionally, all or part of the memory 5103 may also be located outside the communication device 5100. In an optional embodiment, the communication device 5100 may include one or more interface circuits 5104. Optionally, the interface circuit 5104 is connected to the memory 5102 and can be used to receive data and / or instructions from the memory 5102 or other devices, and can be used to send data and / or instructions to the memory 5102 or other devices. For example, the interface circuit 5104 can read data and / or instructions stored in the memory 5102 and send the data and / or instructions to the processor 5101.

[0412] The communication device 5100 described in the above embodiments may be a network device or a terminal, but the scope of the communication device 5100 described in this disclosure is not limited thereto, and the structure of the communication device 5100 may not be limited by FIG. 5A. The communication device may be a standalone device or may be part of a larger device. For example, the communication device may be: (1) a standalone integrated circuit IC, or chip, or chip system or subsystem; (2) a collection of one or more ICs, optionally, the IC collection may also include storage components for storing data, programs and / or instructions; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, terminal device, smart terminal device, cellular phone, wireless device, handheld device, mobile unit, vehicle device, network device, cloud device, artificial intelligence device, etc.; (6) others, etc.

[0413] Figure 5B is a schematic diagram of the structure of chip 5200 according to an embodiment of this disclosure. For cases where the communication device 5100 can be a chip or a chip system, please refer to the schematic diagram of chip 5200 shown in Figure 5B, but it is not limited thereto.

[0414] Chip 5200 includes one or more processors 5201. Chip 5200 is used to perform any of the methods described above.

[0415] In some embodiments, chip 5200 further includes one or more interface circuits 5202. Optionally, terms such as interface circuit, interface, and transceiver pin can be used interchangeably. In some embodiments, chip 5200 further includes one or more memories 5203 for storing data and / or instructions. Optionally, all or part of the memories 5203 may be located outside of chip 5200. Optionally, the interface circuit 5202 is connected to the memories 5203, and the interface circuit 5202 can be used to receive data and / or instructions from the memories 5203 or other devices, and the interface circuit 5202 can be used to send data and / or instructions to the memories 5203 or other devices. For example, the interface circuit 5202 can read data and / or instructions stored in the memories 5203 and send the data and / or instructions to the processor 5201.

[0416] In some embodiments, the interface circuit 5202 performs at least one of the communication steps, such as sending and / or receiving, in the above-described method. For example, the interface circuit 5202 performing the communication steps, such as sending and / or receiving, in the above-described method means that the interface circuit 5202 performs data and / or instruction interaction between the processor 5201, the chip 5200, the memory 5203, or the transceiver device. In some embodiments, the processor 5201 performs at least one of the other steps.

[0417] The modules and / or devices described in the various embodiments, such as virtual devices, physical devices, and chips, can be combined or separated arbitrarily as needed. Optionally, some or all steps can also be performed collaboratively by multiple modules and / or devices, which is not limited here.

[0418] This disclosure also proposes a storage medium storing instructions that, when executed on a communication device, cause the communication device to perform any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but not limited thereto; it may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but not limited thereto; it may also be a temporary storage medium.

[0419] This disclosure also proposes a program product, including a program and / or instructions, which, when executed by a communication device, cause the communication device to perform any of the above methods. Optionally, the program product is a computer program product. Optionally, the program product is stored on the storage medium.

[0420] This disclosure also proposes a computer program that, when run on a computer, causes the computer to perform any of the above methods.

[0421] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer programs. When the computer program is loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this disclosure are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program can be transferred from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., high-density digital video discs (DVDs)), or semiconductor media (e.g., solid-state drives (SSDs)).

[0422] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this disclosure.

[0423] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0424] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A communication method characterized by comprising: The method is performed by a first device, and the method comprises: determining N guard , the N guard is used to indicate the number of resource elements (REs) occupied by guard symbols in a delay-Doppler (DD) domain of a first resource; the guard symbols are used to eliminate mutual interference between pilot symbols and data symbols in the DD domain, and the first resource includes at least one of: an uplink resource, a downlink resource; Based on the N guard transmitting or receiving a signal on the first resource.

2. The method of claim 1, wherein, The first device comprises a terminal or a network device.

3. The method of claim 1 or 2, wherein, The determining N guard , comprising: Determine a delay resolution Δτ of the DD domain and a Doppler resolution Δv of the DD domain based on at least one of a delay domain dimension M of the first resource, a Doppler domain dimension N of the first resource, a parameter μ, and a cyclic prefix CP type of the first resource; wherein the μ is used to indicate a subcarrier spacing of the first resource; based on at least one of the maximum latency l of the DD domain max , the latency domain dimension M, the latency resolution Δτ The used to indicate a number of REs occupied by the two-side guard symbols of the pilot symbol on the delay domain; determined based on at least one of a satellite moving speed v, the Doppler domain dimension N, the Doppler resolution Δv The used to indicate a number of REs occupied by the two-side guard symbols of the pilot symbol on the Doppler domain; based on the and said determining the N guard , the 4. The method of claim 3, wherein, The determining N guard , comprising: The delay domain dimension M is greater than a delay domain threshold M max The Doppler domain dimension N is greater than a Doppler domain threshold N max The The Alternatively, the Among them, the The c is the speed of light, f c is the center frequency of the first resource, R is the radius of the earth, h is the orbit height of the satellite orbit, a model is the satellite elevation angle of the terminal.

5. The method of claim 3, wherein, The determining N guard , comprising: The delay domain dimension M is greater than a delay domain threshold M max The Doppler domain dimension N is less than or equal to a Doppler domain threshold N max The delay domain dimension M is greater than a delay domain threshold M The 6. The method of claim 3, wherein, The determining N guard , comprising: The delay domain dimension M is less than or equal to a delay domain threshold M max The Doppler domain dimension N is greater than a Doppler domain threshold N max The delay domain dimension M is less than or equal to a delay domain threshold M The Alternatively, the Among them, the The c is the speed of light, f c is the center frequency of the first resource, R is the radius of the earth, h is the orbit height of the satellite orbit, and a model is the satellite elevation angle of the terminal.

7. The method of any one of claims 1-6, wherein, The N guard transmitting or receiving a signal on the first resource comprises: based on the N guard determining The or wherein M is a delay domain dimension of the first resource, N is a Doppler domain dimension of the first resource, Npilot the number of REs occupied by pilot symbols in the DD domain oh configured by a network device and / or agreed by a protocol, The number of REs occupied by pilot symbols in the DD domain is equal to N guard the sum of N based on the transmit or receive a signal on the first resource.

8. The method of claim 7, wherein, The basis of Sending or receiving signals on the first resource includes: determining N RE , the N RE for indicating the number of REs occupied by the first resource in a time slot in a time-frequency (TF) domain, The to indicate the number of subcarriers included within one resource block (RB), and used to indicate a number of symbols included in one slot; based on the N RE determining a transport block size, TBS, of the first resource; based on the and the TBS is rate matched to transmit or receive a signal on the first resource.

9. The method of claim 7, wherein, The basis of Sending or receiving signals on the first resource includes: based on the Determine a TBS of the first resource; transmit or receive a signal on the first resource based on the TBS.

10. The method of any one of claims 3-9, wherein, The method further comprises: based on the The and the position of the pilot symbol in the DD domain determines the position of the guard symbol in the DD domain.

11. The method of any one of claims 3-10, wherein, a maximum latency l of the DD domain max based on the maximum latency extension and a first latency, the first latency comprising a maximum latency of a non-terrestrial network, NTN, channel, the first latency, the maximum latency extension being agreed by a protocol, and / or the first latency, the maximum latency extension being configured by a network device.

12. The method of any one of claims 2-11, wherein, The first device comprises a terminal, and the method further comprises at least one of the following: receive first information transmitted by a network device, and determine the delay domain dimension M and the Doppler domain dimension N based on the first information; wherein the first information is used to indicate a number of subcarriers and a number of time domain symbols of the first resource in a TF domain; receive second information transmitted by a network device, and the second information is used to indicate the delay domain dimension M and the Doppler domain dimension N.

13. The method of any one of claims 2-11, wherein, The first device comprises a terminal, and the method further comprises: sending third information to a network device, the third information being used by the network device to determine the N guard .

14. The method of any one of claims 2-11, wherein, The first device comprises a terminal, the determination N guard , comprising: receive fourth information sent by a network device; the fourth information is used for the terminal to determine the N guard ; determining the N guard .

15. The method of any one of claims 2-11, wherein, The first device comprises a network device, and the method further comprises at least one of the following: transmit first information to a terminal, and the first information is used to determine the delay domain dimension M and the Doppler domain dimension N; the first information indicates a number of subcarriers and a number of time domain symbols of the first resource in a TF domain; transmit second information to a terminal, and the second information is used to indicate the delay domain dimension M and the Doppler domain dimension N.

16. The method of any one of claims 2-11, wherein, The first device comprises a network device, the determination N guard comprises: receive third information sent by a terminal, the third information being used for the network device to determine the N guard ; determining the N guard .

17. The method of any one of claims 2-11, wherein, The first device comprises a network device, and the method further comprises: send fourth information to the terminal; the fourth information is used for the terminal to determine the N guard .

18. The method of claim 13 or 16, wherein, The third information includes at least one of the following: position information of the terminal, a satellite elevation angle of the terminal, N guard ; wherein the position information is used to determine the satellite elevation angle.

19. The method of claim 14 or 17, wherein, The fourth information includes at least one of the following: a first pattern, N guard ; wherein the first pattern is a pattern of guard symbols in the first resource DD domain.

20. A first device, comprising: comprises: The processing module is configured to determine N guard , the N guard The number of resource elements (REs) occupied by a guard symbol in a delay-Doppler (DD) domain of a first resource is indicated; the guard symbol is used to eliminate mutual interference between pilot symbols and data symbols in the DD domain, and the first resource includes at least one of the following: an uplink resource, a downlink resource. The transceiver module is configured to transmit or receive signals based on the N guard transmit or receive signals on the first resource.

21. A first device, comprising: comprises: one or more processors; The first device is configured to perform the method in any one of claims 1 to 19.

22. A communication system, characterized by comprise a network device and a terminal, wherein the terminal is configured to implement the method in any one of claims 1 to 11, 12-14, 18, 19, and the network device is configured to implement the method in any one of claims 1 to 11, 15-17, 18, 19.

23. A storage medium, the storage medium storing instructions, wherein, When the instructions run on a communication device, the communication device is caused to perform the method in any one of claims 1 to 19.

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