Communication method and device

Abstract

The invention provides a communication method and device, and belongs to the technical field of communication. The method comprises: a transmitting terminal device determines a reference signal pattern, the reference signal pattern being used for an orthogonal time-frequency-space OTFS modulation system, and a guard interval being between a reference signal transmission position and a data transmission position in the reference signal pattern; and the receiving end equipment receives the reference signal pattern indicated by the transmitting end equipment, so that a reference signal pattern design suitable for the OTFS-MIMO system and signal transmission based on the pattern design are realized.

Description

A communication method and apparatus Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular, to a communication method and apparatus. Background Art

[0002] Orthogonal Time Frequency and Space (OTFS) modulation is a two-dimensional modulation scheme designed in the delay-Doppler (DD) domain. Through a two-dimensional transformation, a two-dispersive channel can be converted into an approximately flat fading channel in the delay-Doppler domain. In the related art, there is no reference signal pattern designed for an OTFS system.

[0003] Summary of the Invention

[0004] The communication method and apparatus proposed by the present disclosure are executed by a transmitting end device, and determine a reference signal pattern for an Orthogonal Time Frequency and Space (OTFS) modulation system. There is a guard interval between the reference signal transmission position and the data transmission position in the reference signal pattern, so that the reference signal pattern can be flexibly combined to adapt to an OTFS-MIMO system.

[0005] In a first aspect, an embodiment of the present disclosure provides a communication method, which is executed by a transmitting end device and includes: determining a reference signal pattern, where the reference signal pattern is used for an Orthogonal Time Frequency and Space (OTFS) modulation system, and there is a guard interval between the reference signal transmission position and the data transmission position in the reference signal pattern.

[0006] In some embodiments of the present disclosure, determining the reference signal pattern includes: determining the number of antenna ports; determining the reference signal pattern corresponding to the number of antenna ports.

[0007] In some embodiments of the present disclosure, the parameters of the reference signal pattern include at least one of the following: l p , the delay domain coordinate of the reference signal transmission position; k p , the Doppler domain coordinate of the reference signal transmission position; l τ , the number of OTFS symbols occupied by the guard interval in the delay domain; k v , the number of OTFS subcarriers occupied by the guard interval in the Doppler domain.

[0008] In some embodiments of the present disclosure, l p satisfies a first condition: 0 < l p -l τ [[ID=4*]]<l p <l p +l τ <M - 1, where M represents the number of OTFS symbols in the delay domain on a scheduling unit; kp Satisfy the second condition: 0 < k p -k v < k p < k p +k v < N - 1, where N represents the number of Doppler domain OTFS sub - carriers on a scheduling unit.

[0009] In some embodiments of the present disclosure, when the number of antenna ports is 1, the delay - Doppler (DD) domain coordinates of the reference signal transmission position are (l p , k p ); the range of the delay domain coordinates of the guard interval is from l p -l τ to l p +l τ , and the range of the Doppler domain coordinates of the guard interval is from k p -2k v to k<00000​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​v to k p +2k v The range of the delay domain coordinates of the data transmission location is 0 to l p -l τ -1 and l p +2l τ +2 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +2k v +1 to N-1.

[0012] In some embodiments of the present disclosure, when the number of antenna ports is 2, the DD domain coordinates of the first reference signal transmission position are (l p , k p ); The DD domain coordinates of the second reference signal transmission position are (l p , k p +2k v +1); the range of the delay domain coordinate of the protection interval is l p -l τ to l p +l τ , the range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +4k v +1; the delay domain coordinates of the data transmission location range from 0 to l p -l τ -1 and l p +l τ +1 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +4k v +2 to N-1.

[0013] In some embodiments of the present disclosure, when the number of antenna ports is 4, the third reference signal transmission position corresponds to the third antenna port, the fourth reference signal transmission position corresponds to the fourth antenna port, and the DD domain coordinates of the first reference signal transmission position are (l p , k p ); The DD domain coordinates of the second reference signal transmission position are (l p , k p +2k v +1), the DD domain coordinates of the third reference signal transmission position are (l p +l τ +1,k p), the DD domain coordinates of the fourth reference signal sending position are (l p +l τ +1,k p +2k v +1); the range of the delay domain coordinate of the protection interval is l p -l τ to l p +2l τ +1, the range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +4k v +1; the delay domain coordinates of the data transmission location range from 0 to l p -l τ -1 and l p +2l τ +2 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +4k v +2 to N-1.

[0014] In some embodiments of the present disclosure, on multiple scheduling units in the DD domain, the difference in the delay domain coordinates of the reference signal transmission positions corresponding to any two antenna ports is |nl τ +1|, where n is a positive integer greater than or equal to 1, and the difference in the Doppler domain coordinates of the reference signal transmission positions corresponding to any two antenna ports is |mk v +1|, where m is an even number greater than or equal to 2.

[0015] In some embodiments of the present disclosure, the method further includes: indicating a reference signal pattern to a receiving device.

[0016] In some embodiments of the present disclosure, the method further includes: mapping the reference signal pattern to a scheduling unit in the DD domain; and sending a signal based on the scheduling unit.

[0017] In a first aspect, an embodiment of the present disclosure provides a communication method, which is executed by a receiving device, including: receiving a reference signal pattern indicated by a transmitting device, wherein the reference signal pattern is used for an orthogonal time-frequency-space (OTFS) modulation system, and there is a protection interval between a reference signal sending position and a data sending position in the reference signal pattern.

[0018] In some embodiments of the present disclosure, the reference signal pattern is agreed upon by a protocol, and the reference signal pattern is associated with the number of antenna ports.

[0019] In some embodiments of the present disclosure, the parameters of the reference signal pattern include at least one of the following: p, the time-delay domain coordinates of the reference signal transmission position; k p , the Doppler domain coordinates of the reference signal transmission position; l τ , the number of OTFS symbols occupied by the corresponding guard interval in the time-delay domain; k v , the number of Doppler domain OTFS sub-carriers occupied by the corresponding guard interval in the Doppler domain.

[0020] In some embodiments of the present disclosure, l p satisfies the first condition: 0 < l p -l τ < l p < l p +l τ < M - 1, where M represents the number of OTFS symbols in the time-delay domain on a scheduling unit; k p satisfies the second condition: 0 < k p -k v < k p < k p +k v < N - 1, where N represents the number of Doppler domain OTFS sub-carriers on a scheduling unit.

[0021] In some embodiments of the present disclosure, when the number of antenna ports is 1, the time-delay - Doppler (DD) domain coordinates of the reference signal transmission position are (l p , k p ); the range of the time-delay domain coordinates of the guard interval is from l p -l τ to l p +l τ , the range of the Doppler domain coordinates of the guard interval is from k p -2k v to k p +2k v ; the range of the time-delay domain coordinates of the data transmission position is from 0 to l p -l τ -1 and from l p +l τ +1 to M - 1, and the range of the Doppler domain coordinates of the data transmission position is from 0 to k p -2k v -1 and from k p +2k v +1 to N - 1.

[0022] In some embodiments of the present disclosure, when the number of antenna ports is 2, the first reference signal transmission position corresponds to the first antenna port, the second reference signal transmission position corresponds to the second antenna port, and the DD domain coordinates of the first reference signal transmission position are (l p , k p ); the DD domain coordinates of the second reference signal transmission position are (lp +l τ +1,k p ); The range of the delay domain coordinates of the protection interval is l p -l τ to l p +2l τ +1, the range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +2k v The range of the delay domain coordinates of the data transmission location is 0 to l p -l τ -1 and l p +2l τ +2 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +2k v +1 to N-1.

[0023] In some embodiments of the present disclosure, when the number of antenna ports is 2, the first reference signal sending position corresponds to the first antenna port, the second reference signal sending position corresponds to the second antenna port, and the DD domain coordinates of the first reference signal sending position are (l p , k p ); The DD domain coordinates of the second reference signal transmission position are (l p , k p +2k v +1); the range of the delay domain coordinate of the protection interval is l p -l τ to l p +l τ , the range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +4k v +1; the delay domain coordinates of the data transmission location range from 0 to l p -l τ -1 and l p +l τ +1 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +4k v +2 to N-1.

[0024] In some embodiments of the present disclosure, when the number of antenna ports is 4, the first reference signal sending position corresponds to the first antenna port, the second reference signal sending position corresponds to the second antenna port, the third reference signal sending position corresponds to the third antenna port, and the fourth reference signal sending position corresponds to the fourth antenna port. The DD domain coordinates of the first reference signal sending position are (l p , k p ); The DD domain coordinates of the second reference signal transmission position are (l p , k p +2k v +1), the DD domain coordinates of the third reference signal transmission position are (l p +l τ +1,k p ), the DD domain coordinates of the fourth reference signal sending position are (l p +l τ +1,k p +2k v +1); the range of the delay domain coordinate of the protection interval is l p -l τ to l p +2l τ +1, the range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +4k v +1; the delay domain coordinates of the data transmission location range from 0 to l p -l τ -1 and l p +2l τ +2 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +4k v +2 to N-1.

[0025] In some embodiments of the present disclosure, on multiple scheduling units in the DD domain, the difference in the delay domain coordinates of the reference signal transmission positions corresponding to any two antenna ports is |nl τ +1|, where n is a positive integer greater than or equal to 1, and the difference in the Doppler domain coordinates of the reference signal transmission positions corresponding to any two antenna ports is |mk v +1|, where m is an even number greater than or equal to 2.

[0026] In some embodiments of the present disclosure, the method further includes: receiving a signal sent by a transmitting end device based on a scheduling unit in the DD domain, wherein the reference signal pattern is mapped onto the scheduling unit.

[0027] In some embodiments of the present disclosure, the method further includes: performing any one of channel estimation, demodulation, and beam measurement based on a signal.

[0028] In a third aspect, an embodiment of the present disclosure provides a communication device, which includes a determination module for: determining a reference signal pattern, where the reference signal pattern is used for orthogonal time-frequency-space OTFS modulation, and there is a guard interval between the reference signal transmission position and the data transmission position in the reference signal pattern.

[0029] In a fourth aspect, an embodiment of the present disclosure provides a communication device, which includes a receiving module for: receiving a reference signal pattern indicated by a transmitting-end device, where the reference signal pattern is used for orthogonal time-frequency-space OTFS modulation, and there is a guard interval between the reference signal transmission position and the data transmission position in the reference signal pattern.

[0030] In a fifth aspect, an embodiment of the present disclosure provides a reference signal pattern, which is used for orthogonal time-frequency-space OTFS modulation, and there is a guard interval between the reference signal transmission position and the data transmission position in the reference signal pattern.

[0031] In some embodiments of the present disclosure, the reference signal pattern is agreed upon by a protocol, and there is an association relationship between the reference signal pattern and the number of antenna ports.

[0032] In some embodiments of the present disclosure, the parameters of the reference signal pattern include at least one of the following: l p , the time-delay domain coordinate of the reference signal transmission position; k p , the Doppler domain coordinate of the reference signal transmission position; l τ , the number of OTFS symbols occupied by the guard interval in the time-delay domain; k v , the number of Doppler domain OTFS subcarriers occupied by the guard interval in the Doppler domain.

[0033] In some embodiments of the present disclosure, l p satisfies the first condition: 0 < l p -l τ < l p < l <M - 1, where M represents the number of OTFS symbols in the time-delay domain on a scheduling unit; k p +l τ <M - 1, where M represents the number of OTFS symbols in the time-delay domain on a scheduling unit; k p satisfies the second condition: 0 < k p -k v < k p < k p v <N - 1, where N represents the number of Doppler domain OTFS subcarriers on a scheduling unit.

[0034] In some embodiments of the present disclosure, when the number of antenna ports is 1, the delay-Doppler DD domain coordinates of the reference signal transmission position are (l p , k p ); The range of the delay domain coordinates of the protection interval is l p -l τ to l p +l τ , the range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +2k v The range of the delay domain coordinates of the data transmission location is 0 to l p -l τ -1 and l p +l τ +1 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +2k v +1 to N-1.

[0035] In some embodiments of the present disclosure, when the number of antenna ports is 2, the first reference signal sending position corresponds to the first antenna port, the second reference signal sending position corresponds to the second antenna port, and the DD domain coordinates of the first reference signal sending position are (l p , k p ); The DD domain coordinates of the second reference signal transmission position are (l p +l τ +1,k p ); The range of the delay domain coordinates of the protection interval is l p -l τ to l p +2l τ +1, the range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +2k v The range of the delay domain coordinates of the data transmission location is 0 to l p -l τ -1 and l p +2l τ +2 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +2k v +1 to N-1.

[0036] In some embodiments of the present disclosure, when the number of antenna ports is 2, the first reference signal sending position corresponds to the first antenna port, the second reference signal sending position corresponds to the second antenna port, and the DD domain coordinates of the first reference signal sending position are (l p , k p ); The DD domain coordinates of the second reference signal transmission position are (l p , k p +2k v +1); the range of the delay domain coordinate of the protection interval is l p -l τ to l p +l τ , the range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +4k v +1; the delay domain coordinates of the data transmission location range from 0 to l p -l τ -1 and l p +l τ +1 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +4k v +2 to N-1.

[0037] In some embodiments of the present disclosure, when the number of antenna ports is 4, the first reference signal sending position corresponds to the first antenna port, the second reference signal sending position corresponds to the second antenna port, the third reference signal sending position corresponds to the third antenna port, and the fourth reference signal sending position corresponds to the fourth antenna port. The DD domain coordinates of the first reference signal sending position are (l p , k p ); The DD domain coordinates of the second reference signal transmission position are (l p , k p +2k v +1), the DD domain coordinates of the third reference signal transmission position are (l p +l τ +1,k p ), the DD domain coordinates of the fourth reference signal sending position are (l p +l τ +1,k p +2k v +1); the range of the delay domain coordinate of the protection interval is l p -l τ to l p +2l τ +1, the range of the Doppler domain coordinates of the guard interval is kp -2k v to k p +4k v +1; the delay domain coordinates of the data transmission location range from 0 to l p -l τ -1 and l p +2l τ +2 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +4k v +2 to N-1.

[0038] In some embodiments of the present disclosure, on multiple scheduling units in the DD domain, the difference in the delay domain coordinates of the reference signal transmission positions corresponding to any two antenna ports is |nl τ +1|, where n is a positive integer greater than or equal to 1, and the difference in the Doppler domain coordinates of the reference signal transmission positions corresponding to any two antenna ports is |mk v +1|, where m is an even number greater than or equal to 2.

[0039] In the sixth aspect, an embodiment of the present disclosure provides a communication device, comprising: a transceiver; a memory; and a processor, which is connected to the transceiver and the memory respectively, and is configured to control the wireless signal reception and transmission of the transceiver by executing computer-executable instructions on the memory, so that the device executes the above-mentioned first and second aspects of the method.

[0040] In a seventh aspect, an embodiment of the present disclosure provides a computer storage medium, wherein the computer storage medium stores computer-executable instructions; after the computer-executable instructions are executed by a processor, the above-mentioned first and second aspects of the method can be implemented.

[0041] In an eighth aspect, an embodiment of the present disclosure provides a communication system, characterized in that it includes: a transmitting end device and a receiving end device, wherein the transmitting end device is used to execute the above-mentioned first aspect method; the receiving end device is used to execute the above-mentioned second aspect method. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0043] FIG1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present disclosure;

[0044] FIG2 is a flow chart of a communication method provided by an embodiment of the present disclosure;

[0045] FIG3 is a flow chart of a communication method provided by an embodiment of the present disclosure;

[0046] FIG4 is a reference signal pattern provided by an embodiment of the present disclosure;

[0047] FIG5 is a flow chart of a communication method provided by an embodiment of the present disclosure;

[0048] FIG6 is a reference signal pattern provided by an embodiment of the present disclosure;

[0049] FIG7 is a reference signal pattern provided by an embodiment of the present disclosure;

[0050] FIG8 is a reference signal pattern provided by an embodiment of the present disclosure;

[0051] FIG9 is a flow chart of a communication method provided by an embodiment of the present disclosure;

[0052] FIG10 is a flow chart of a communication method provided by an embodiment of the present disclosure;

[0053] FIG11 is a flow chart of a communication method provided by an embodiment of the present disclosure;

[0054] FIG12 is a flow chart of a communication method provided by an embodiment of the present disclosure;

[0055] FIG13 is an exemplary diagram of a communication interaction method provided by an embodiment of the present disclosure;

[0056] FIG14 is a schematic structural diagram of a communication device provided by an embodiment of the present disclosure;

[0057] FIG15 is a schematic structural diagram of a communication device provided by an embodiment of the present disclosure;

[0058] FIG16 is a schematic structural diagram of a communication device provided by an embodiment of the present disclosure;

[0059] FIG17 is a schematic structural diagram of a communication device provided by an embodiment of the present disclosure;

[0060] FIG18 is a schematic structural diagram of a communication device provided by an embodiment of the present disclosure;

[0061] FIG19 is a schematic structural diagram of a communication device provided by an embodiment of the present disclosure as a chip or a chip system;

[0062] FIG20 is a schematic structural diagram of a communication system provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0063] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0064] The terms used in the embodiments of the present disclosure are for the purpose of describing specific embodiments only and are not intended to limit the embodiments of the present disclosure. The singular forms "a," "an," and "the" used in the embodiments of the present disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0065] It should be understood that although the terms first, second, third, etc. may be used to describe various information in the embodiments of the present disclosure, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the embodiments of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if" and "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0066] In some embodiments, devices, etc. can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. Terms such as "device", "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", and "subject" can be used interchangeably.

[0067] 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, client, etc. can be used interchangeably.

[0068] In some embodiments, the access network device, core network device, or network device may be replaced by a terminal. For example, the communication between the access network device, core network device, or network device and the terminal is replaced by the communication between multiple terminals (for example, also referred to as

[0069] The embodiments of the present disclosure may also be applied to structures such as device-to-device, vehicle-to-everything (V2X), etc. In this case, the terminal may also have a structure that has all or part of the functions of the access network device. In addition, the terms "uplink" and "downlink" may be replaced with a language corresponding to inter-terminal communication (for example, "side"). For example, uplink channel, downlink channel, etc. may be replaced with side channel, and uplink, downlink, etc. may be replaced with side link.

[0070] 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, the core network device, or the network device may have a structure that has all or part of the functions of the terminal.

[0071] In some embodiments, the names of information, etc. are not limited to the names described in the embodiments, and terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "symbol", "code element", "codebook", "code word", "code point", "bit", "data", "program", and "chip" can be used interchangeably.

[0072] In some embodiments, the terms "side", "sidelink", "side communication", "sidelink communication", "direct connection", "direct link", "direct communication", "direct link communication" and the like may be used interchangeably.

[0073] In some embodiments, the terms "reference signal", "pilot", etc. can be used interchangeably.

[0074] In some embodiments, the description “A to B” or the like indicates that the included range includes A and B.

[0075] The embodiments of the present disclosure are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present disclosure, and should not be understood as limiting the present disclosure.

[0076] To facilitate understanding, the terms involved in this application are first introduced.

[0077] Orthogonal time-frequency air modulation,

[0078] Orthogonal time-frequency-space modulation is a two-dimensional modulation scheme designed in the delay-Doppler domain. Through a series of two-dimensional transformations, it can convert a dual-dispersion channel into a nearly flat-fading channel in the delay-Doppler domain. In this domain, every symbol in a data frame experiences the same, nearly constant fading.

[0079] Please refer to Figure 1, which is a schematic diagram of the architecture of a communication system provided in an embodiment of the present disclosure. The communication system may include, but is not limited to, one network device and one terminal device. The number and configuration of devices shown in Figure 1 are for example purposes only and do not constitute a limitation on the embodiments of the present disclosure. In actual applications, two or more network devices and two or more terminal devices may be included. The communication system shown in Figure 1 includes, for example, one network device 101 and one terminal device 102.

[0080] It should be noted that the technical solutions of the embodiments of the present disclosure can be applied to various communication systems. For example, long term evolution (LTE) systems, fifth generation (5G) mobile communication systems, 5G new radio (NR) systems, or other future new mobile communication systems. It should also be noted that the side link in the embodiments of the present disclosure can also be referred to as a side link or a direct link.

[0081] The network device 101 in the embodiment of the present disclosure is an entity on the network side for transmitting or receiving signals. For example, the network device 101 can be an evolved NodeB (eNB), a transmission reception point (TRP), a next generation NodeB (gNB) in an NR system, a base station in other future mobile communication systems, or an access node in a wireless fidelity (WiFi) system. The embodiment of the present disclosure does not limit the specific technology and specific device form adopted by the network device. The network device provided in the embodiment of the present disclosure can be composed of a centralized unit (CU) and a distributed unit (DU), wherein the CU can also be called a control unit. The CU-DU structure can be used to split the protocol layer of the network device, such as the base station, and the functions of some protocol layers are placed in the CU for centralized control, and the functions of the remaining part or all of the protocol layers are distributed in the DU, and the DU is centrally controlled by the CU.

[0082] The terminal device 102 in the embodiment of the present disclosure is an entity on the user side for receiving or transmitting signals, such as a mobile phone. The terminal device may also be referred to as a terminal device (terminal), user equipment (UE), mobile station (MS), mobile terminal device (MT), etc. The terminal device may be a car with communication functions, a smart car, a mobile phone, a wearable device, a tablet computer (Pad), a computer with wireless transceiver functions, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in self-driving (self-driving), a wireless terminal device in remote medical surgery (remote medical surgery), a wireless terminal device in a smart grid (smart grid), a wireless terminal device in transportation safety (transportation safety), a wireless terminal device in a smart city (smart city), a wireless terminal device in a smart home (smart home), etc. The embodiment of the present disclosure does not limit the specific technology and specific device form adopted by the terminal device.

[0083] The transmitting device mentioned in the embodiments of the present disclosure may refer to the network device 101, and the receiving device may refer to the terminal device 102. It is understood that in some embodiments, the transmitting device may refer to the terminal device 102, and the receiving device may refer to the network device 101, and the present disclosure does not limit this. The communication system described in the embodiments of the present disclosure is intended to more clearly illustrate the technical solutions of the embodiments of the present disclosure and does not constitute a limitation on the technical solutions provided by the embodiments of the present disclosure. It is known to those skilled in the art that with the evolution of the system architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present disclosure are also applicable to similar technical problems.

[0084] It should be noted that the reference signal pattern determination method provided in any embodiment of the present disclosure can be executed alone, or in combination with possible implementation methods in other embodiments, or in combination with any technical solution in related technologies.

[0085] The reference signal pattern determination method and apparatus provided by the present disclosure are described in detail below with reference to the accompanying drawings.

[0086] FIG2 is a flow chart of a communication method provided by an embodiment of the present disclosure. The method is executed by a transmitting end device. As shown in FIG2 , the communication method may include the following steps:

[0087] Step 201: Determine a reference signal pattern.

[0088] In some embodiments of the present disclosure, a transmitting end device determines a reference signal pattern so that the transmitting end device can send a reference signal according to the pattern to adapt to the OTFS-MIMO system.

[0089] In some embodiments of the present disclosure, the reference signal pattern is an arrangement of the reference signal sequence in the time domain, frequency domain, and space domain.

[0090] In some embodiments of the present disclosure, a reference signal pattern is used in an orthogonal time-frequency-space (OTFS) modulation system. The reference signal pattern may indicate information such as a reference signal sending position and a data sending position. Optionally, in some embodiments, a guard interval is provided between the reference signal sending position and the data sending position.

[0091] In some embodiments of the present disclosure, there is no restriction on the type of transmitting end device, which can be a network device or a terminal device.

[0092] In some embodiments of the present disclosure, there is no restriction on the type of reference signal, which may be, for example, a reference signal for channel estimation, a reference signal for signal demodulation, and a reference signal for beam measurement.

[0093] In some embodiments of the present disclosure, the reference signal pattern of the transmitting device may be agreed upon by a protocol, wherein the reference signal pattern is associated with the number of antenna ports, i.e., the transmitting device may determine the reference signal pattern based on the number of antenna ports required to send the reference signal; the present disclosure does not limit the relationship between the reference signal and the reference signal pattern, which may be, for example, one-to-one or many-to-one; i.e., each reference signal may uniquely correspond to a reference signal pattern, and a corresponding reference signal may be transmitted using a specific reference signal pattern, or, alternatively, multiple reference signals may correspond to one reference signal pattern respectively, i.e., multiple reference signals may be transmitted through the same reference signal pattern; the transmitting device determines the pattern of the reference signal to be sent based on the protocol agreement.

[0094] For example, the transmitting end device is a network device, and the network device can determine a channel state information reference signal (CSI-RS) pattern based on a protocol agreement.

[0095] In summary, the pattern determination method provided in the present disclosure, performed by a transmitting device, includes determining a reference signal pattern, wherein the reference signal pattern is used in an Orthogonal Time-Frequency-Space (OTFS) modulation system, and a guard interval is provided between the reference signal transmission position and the data transmission position in the reference signal pattern. By determining the reference signal pattern, the present disclosure enables the transmitting device to transmit the reference signal according to the pattern to adapt to the OTFS-MIMO system.

[0096] FIG3 is a flow chart of a communication method provided in an embodiment of the present disclosure. The method is executed by a transmitting device. As shown in FIG3 , based on the embodiment shown in FIG2 , the communication method may further include the following steps:

[0097] Step 301: Determine the number of antenna ports.

[0098] In some embodiments of the present disclosure, the transmitting end device may determine the number of antenna ports corresponding to the antenna that sends the reference signal to determine the pattern of the reference signal.

[0099] In some embodiments of the present disclosure, the number of antenna ports may be 1, 2, 4, 8, 12, 16, 24, or 32 supported by the NR system, or other values, which are not limited by the present disclosure.

[0100] Step 302: Determine a reference signal pattern corresponding to the number of antenna ports.

[0101] In some embodiments of the present disclosure, the transmitting end device may determine a reference signal pattern corresponding to the number of antenna ports to map the reference signal pattern to a scheduling unit in the DD domain.

[0102] In some embodiments of the present disclosure, the horizontal coordinate of the scheduling unit is delay, and the vertical coordinate is Doppler.

[0103] In this disclosure, the following embodiments will specifically describe the reference signal patterns corresponding to 1, 2, and 4 antenna ports, respectively. For antenna ports greater than 4, the three reference signal patterns described above can be flexibly combined to generate corresponding reference signal patterns. For example, when the number of antenna ports is 8, two reference signal patterns for 4 antenna ports can be combined to form a reference signal pattern for 8 antenna ports. For example, the reference signal pattern for 8 antenna ports can be formed by two reference signal patterns for 4 antenna ports placed side by side.

[0104] Specifically, the parameters of the reference signal pattern include at least one of the following, and the following parameters are all positive integers: p , the delay domain coordinates of the reference signal sending position; k p , the Doppler domain coordinates of the reference signal sending position; l τ, the number of OTFS symbols occupied by the guard interval in the time delay domain. For example, if the maximum time delay spread is 10 ms and the duration of every two OTFS symbols in the time delay domain is 1 ms, then l τ is 10; k v , the number of Doppler domain OTFS subcarriers occupied by the guard interval in the Doppler domain. The Doppler frequency shift can be positive or negative. When the distance between the transmitting device and the receiving device becomes closer, the Doppler frequency of the transmitted signal increases, the wavelength becomes shorter, and the Doppler frequency shift is positive. In other words, when the distance between the transmitting device and the receiving device becomes farther, the Doppler frequency of the transmitted signal decreases, the wavelength becomes longer, and the Doppler frequency shift is negative.

[0105] Specifically, l p should satisfy the first condition: 0 < l p -l τ < l p < l p +l τ < M - 1, where M represents the number of OTFS symbols in the time delay domain on a scheduling unit; k p should satisfy the second condition: 0 < k p -k v < k p < k p +k v < N - 1, where N represents the number of Doppler domain OTFS subcarriers on a scheduling unit.

[0106] In some embodiments of the present disclosure, the above parameters can be determined by the network device or by the terminal itself. The present disclosure does not limit this. For example, the terminal can determine the time delay of the signal through the downlink Timing Advance (TA); by continuously receiving and demodulating the signal and performing circular convolution on the sequence of the received signal, the time delay spread of the signal can be determined.

[0107] In summary, according to the method for determining the pattern provided by the present disclosure, the method is executed by the transmitting device and includes: determining the number of antenna ports; determining the reference signal pattern corresponding to the number of antenna ports. The parameters of the reference signal pattern include at least one of the following: l p , the time delay domain coordinates of the reference signal transmission position; k p , the Doppler domain coordinates of the reference signal transmission position; l τ , the number of OTFS symbols occupied by the guard interval in the time delay domain; k v , the number of Doppler domain OTFS subcarriers occupied by the guard interval in the Doppler domain. Among them, l p satisfies the first condition: 0 < l p -l τ < l p < l p +lτ <M - 1, where M represents the number of OTFS symbols in the delay domain on a scheduling unit; k p Satisfies the second condition: 0 < k p -k v <k p <k p +k v <N - 1, where N represents the number of OTFS sub - carriers in the Doppler domain on a scheduling unit. The present disclosure realizes a reference signal pattern in the DD domain by setting a corresponding reference signal pattern based on the number of antenna ports and specifying relevant parameters in the reference signal pattern.

[0108] FIG. 4 shows a reference signal pattern with one antenna port provided by an embodiment of the present disclosure. This reference signal pattern can be determined by a transmitting - end device and should have the following characteristics:

[0109] In the embodiment shown in FIG. 4, the reference signal, that is, the delay - Doppler DD - domain coordinates of the pilot transmission position are (l p , k p ).

[0110] In the embodiment shown in FIG. 4, since the time when the receiving - end device receives the signal must be later than the time when the transmitting - end device transmits the signal, the delay value is always positive, which is manifested as a transmission data offset on the reference signal pattern. And to prevent the data on the left side of the reference signal from being shifted to the right side after delay, the range of the delay - domain coordinates of the guard interval should be from l p -l τ to l p +l τ ; Since the Doppler frequency shift can be positive or negative, to prevent overlap between two reference signals caused by the Doppler frequency shift, the range of the Doppler - domain coordinates of the guard interval is from k p -2k v to k p +2k v , where the value of the guard interval in the transmitting - end reference signal pattern is set to 0.

[0111] In the embodiment shown in FIG. 4, the range of the delay - domain coordinates of the data transmission position is from 0 to l p -l τ [[ID=COMBINE_START]]-1 and l p [[ID=COMBINE_END]]+l p +l<COMBINE_START> τ <COMBINE_END>+1 to M - 1, and the range of the Doppler - domain coordinates of the data transmission position is from 0 to k p -2k v -1 and k p +2k v +1 to N - 1.

[0112] In summary, the present disclosure proposes a single-antenna reference signal pattern to adapt to the OTFS-MIMO system by limiting the reference signal transmission position, the guard interval range, and the data transmission position range.

[0113] FIG5 is a flow chart of a communication method provided by an embodiment of the present disclosure, wherein the method is executed by a transmitting device, and the number of antenna ports for transmitting reference signals is greater than or equal to 2. As shown in FIG5 , based on the embodiment shown in FIG3 , the communication method further includes the following steps:

[0114] Step 501: Determine a first reference signal sending position.

[0115] In some embodiments of the present disclosure, the transmitting end device may determine a first reference signal sending position to determine other reference signal sending positions.

[0116] In some embodiments of the present disclosure, the first reference signal sending position is a reference signal sending position corresponding to the first antenna port.

[0117] In some embodiments of the present disclosure, the transmitting end device may determine the sending position of the first reference signal by setting constraints to ensure that there is a sufficient protection interval around the determined first reference signal sending position. The specific constraints may be referred to in the following embodiments.

[0118] Step 502: Determine a second reference signal sending position based on the first reference signal sending position.

[0119] In some embodiments of the present disclosure, the transmitting end device may determine the second reference signal sending position based on the first reference signal sending position.

[0120] Specifically, the transmitting end device may determine the second reference signal sending position based on the reference signal sending position and the guard interval.

[0121] In some embodiments of the present disclosure, the second reference signal sending position is a reference signal sending position corresponding to the second antenna port.

[0122] Optionally, in some embodiments of the present disclosure, when the number of antenna ports is greater than two, other reference signal transmission positions may be determined based on the first reference signal transmission position. For example, when the number of antenna ports is four, the third reference signal transmission position may be determined based on the first reference signal transmission position and the guard interval, and the fourth reference signal transmission position may be determined based on the first reference signal transmission position and the guard interval. For other numbers of antenna ports, other reference signal transmission positions may be determined similarly, and will not be further described here.

[0123] In summary, according to the pattern determination method provided by the present disclosure, wherein the method is performed by a transmitting device, and the number of antenna ports transmitting reference signals is greater than or equal to 2, the method includes: determining a first reference signal transmission position, where the first reference signal transmission position is the reference signal transmission position corresponding to the first antenna port; and determining a second reference signal transmission position based on the first reference signal transmission position, where the second reference signal transmission position is the reference signal transmission position corresponding to the second antenna port. The present disclosure determines the first reference signal transmission position by setting constraints, and simultaneously determines other reference signal transmission positions based on the first reference signal transmission position and a guard interval, thereby achieving determination of the reference signal pattern and stable transmission of signal data.

[0124] FIG6 shows a reference signal pattern with two antenna ports provided by an embodiment of the present disclosure. The reference signal pattern may be determined by a transmitting device and should have the following characteristics:

[0125] In the embodiment shown in FIG6 , the delay-Doppler DD domain coordinates of the first reference signal transmission position are (l p , k p Based on the first reference signal transmission position and the guard interval, the DD domain coordinates of the second reference signal transmission position can be determined as (l p +l τ +1,k p ).

[0126] In the embodiment shown in FIG6 , since the time when the receiving end device receives the signal is necessarily later than the time when the transmitting end transmits the signal, the delay value is always positive, which is manifested as a transmission data offset on the reference signal pattern. In order to prevent the data transmitted on the left side of the reference signal from being offset to the right side due to the delay, the range of the delay domain coordinate of the guard interval should be l p -l τ to l p +2l τ +1; Since the Doppler shift can be positive or negative, in order to prevent the overlap between the two reference signals caused by the Doppler shift, the range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +2k v , where the value of the guard interval in the reference signal pattern at the transmitting end is set to 0.

[0127] In the embodiment shown in FIG6, the range of the delay domain coordinates of the data transmission position is 0 to l p -l τ -1 and l p +2l τ +2 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2kv -1 and k p +2k v +1 to N-1.

[0128] In the embodiment shown in FIG6 , on multiple scheduling units in the DD domain, the difference in the delay domain coordinates of the reference signal transmission positions corresponding to any two antenna ports is |nl τ +1|, where n is a positive integer greater than or equal to 1, and the difference in the Doppler domain coordinates of the reference signal transmission positions corresponding to any two antenna ports is |mk v +1|, where m is an even number greater than or equal to 2.

[0129] In summary, the present disclosure proposes a dual-antenna reference signal pattern to adapt to the OTFS-MIMO system by limiting the reference signal transmission position, the guard interval range, and the data transmission position range.

[0130] FIG7 shows another reference signal pattern with two antenna ports provided by an embodiment of the present disclosure. The reference signal pattern may be determined by a transmitting device and should have the following characteristics:

[0131] In the embodiment shown in FIG7 , the DD domain coordinates of the first reference signal transmission position are (l p , k p Based on the first reference signal transmission position and the guard interval, the DD domain coordinates of the second reference signal transmission position can be determined as (l p , k p +2k v +1).

[0132] In the embodiment shown in FIG7 , since the time when the receiving end device receives the signal is necessarily later than the time when the transmitting end transmits the signal, the delay value is always positive, which is manifested as a transmission data offset on the reference signal pattern. In order to prevent the data transmitted on the left side of the reference signal from being offset to the right side due to the delay, the range of the delay domain coordinate of the guard interval should be l p -l τ to l p +l τ Since the Doppler shift can be positive or negative, in order to prevent the overlap between the two reference signals caused by the Doppler shift, the range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +4k v +1, where the guard interval value in the reference signal pattern at the transmitting end is set to 0.

[0133] In the embodiment shown in FIG7 , the range of the delay domain coordinates of the data transmission position is 0 to l p -l τ-1 and l p +l τ +1 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +4k v +2 to N-1.

[0134] In the embodiment shown in FIG7 , in multiple scheduling units in the DD domain, the difference in the delay domain coordinates of the reference signal transmission positions corresponding to any two antenna ports is |nl τ +1|, where n is a positive integer greater than or equal to 1, and the difference in the Doppler domain coordinates of the reference signal transmission positions corresponding to any two antenna ports is |mk v +1|, where m is an even number greater than or equal to 2.

[0135] In summary, the present disclosure proposes a dual-antenna reference signal pattern to adapt to the OTFS-MIMO system by limiting the reference signal transmission position, the guard interval range, and the data transmission position range.

[0136] FIG8 is a reference signal pattern for four antenna ports provided by an embodiment of the present disclosure. The reference signal pattern may be determined by a transmitting device and should have the following characteristics:

[0137] In the embodiment shown in FIG8 , the DD domain coordinates of a reference signal transmission position are (l p , k p Based on the first reference signal transmission position and the guard interval, the DD domain coordinates of the second reference signal transmission position can be determined as (l p , k p +2k v +1), the DD domain coordinates of the third reference signal transmission position are (l p +l τ +1,k p ), the DD domain coordinates of the fourth reference signal sending position are (l p +l τ +1,k p +2k v +1), wherein the third reference signal sending position corresponds to the third antenna port, and the fourth reference signal sending position corresponds to the fourth antenna port.

[0138] In the embodiment shown in FIG8 , since the time when the receiving end device receives the signal is necessarily later than the time when the transmitting end transmits the signal, the delay value is always positive, which is manifested as a transmission data offset on the reference signal pattern. In order to prevent the data transmitted on the left side of the reference signal from being offset to the right side due to the delay, the range of the delay domain coordinate of the guard interval should be l p -lτ to l p +2l τ +1; Since the Doppler shift can be positive or negative, in order to prevent the overlap between the two reference signals caused by the Doppler shift, the range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +4k v +1, where the guard interval value in the reference signal pattern at the transmitting end is set to 0.

[0139] In the embodiment shown in FIG8, the range of the delay domain coordinates of the data transmission position is 0 to l p -l τ -1 and l p +2l τ +2 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +4k v +2 to N-1.

[0140] In the embodiment shown in FIG8 , in multiple scheduling units in the DD domain, the difference in the delay domain coordinates of the reference signal transmission positions corresponding to any two antenna ports is |nl τ +1|, where n is a positive integer greater than or equal to 1, and the difference in the Doppler domain coordinates of the reference signal transmission positions corresponding to any two antenna ports is |mk v +1|, where m is an even number greater than or equal to 2.

[0141] In summary, the present disclosure proposes a four-antenna reference signal pattern to adapt to the OTFS-MIMO system by limiting the reference signal transmission position, the guard interval range, and the data transmission position range.

[0142] However, it should be understood that the two two-antenna reference patterns described in FIG. 7 or FIG. 8 may be combined to form a four-antenna reference signal pattern, or four one-antenna reference patterns may be combined to form a four-antenna reference signal pattern.

[0143] FIG9 is a flow chart of a communication method provided by an embodiment of the present disclosure, wherein the method is executed by a transmitting end device. Based on the above-mentioned embodiment, the communication method further includes the following steps:

[0144] Step 901: Indicate a reference signal pattern to a receiving device.

[0145] In some embodiments of the present disclosure, the transmitting end device may indicate a reference signal pattern to the receiving end device so that the receiving end device can determine which pattern the transmitting end uses to send the reference signal, as well as the location of the received reference signal and the location of the received data.

[0146] The present disclosure does not impose any restriction on the time when the transmitting end device indicates the reference signal pattern to the receiving end device. The reference signal pattern may be sent before the reference signal is sent, or may be sent simultaneously with the reference signal.

[0147] In some embodiments of the present disclosure, there is no restriction on the type of receiving device, which can be a network device or a terminal device.

[0148] In some embodiments of the present disclosure, step 901 is optional. If the receiving end device has been pre-configured with reference signal pattern information, that is, the receiving end has obtained the reference signal pattern corresponding to each reference signal, the transmitting end device may not perform step 901.

[0149] In summary, the present disclosure provides a method for determining a pattern, wherein the method is performed by a transmitting device and includes indicating a reference signal pattern to a receiving device. The present disclosure provides a method for determining a reference signal pattern by the transmitting device, so that the receiving device can determine which pattern the transmitting device is using to send the reference signal.

[0150] FIG10 is a flow chart of a communication method provided by an embodiment of the present disclosure, wherein the method is executed by a transmitting end device. Based on the above-mentioned embodiment, the communication method further includes the following steps:

[0151] Step 1001: Map a reference signal pattern to a scheduling unit in the DD domain.

[0152] In some embodiments of the present disclosure, the transmitting end device may map the reference signal pattern to a scheduling unit in the DD domain, so that the transmitting end device may send a signal based on the scheduling unit.

[0153] In some embodiments of the present disclosure, the horizontal coordinate of the scheduling unit is delay, and the vertical coordinate is Doppler.

[0154] Step 1002: Send a signal based on the scheduling unit.

[0155] In some embodiments of the present disclosure, the transmitting end device may send a signal based on a scheduling unit.

[0156] In summary, the present disclosure provides a method for determining a pattern, wherein the method is performed by a transmitting device and includes: mapping a reference signal pattern to a scheduling unit in the DD domain; and transmitting a signal based on the scheduling unit. The present disclosure maps the reference signal pattern to the scheduling unit in the DD domain, and utilizes the scheduling unit to transmit the reference signal according to the determined pattern.

[0157] FIG11 is a flow chart of a communication method provided by an embodiment of the present disclosure, wherein the method is executed by a receiving device. Based on the above-mentioned embodiment, the communication method further includes the following steps:

[0158] Step 1101: Receive a reference signal pattern indicated by a transmitting device.

[0159] In some embodiments of the present disclosure, the receiving device may receive a reference signal pattern indicated by the transmitting device to map the signal pattern into a scheduling unit.

[0160] In some embodiments of the present disclosure, a reference signal pattern is used in an orthogonal time-frequency-space (OTFS) modulation system, and a guard interval is provided between a reference signal transmission position and a data transmission position in the reference signal pattern.

[0161] In some embodiments of the present disclosure, there is no restriction on the type of receiving device, which can be a network device or a terminal device.

[0162] In some embodiments of the present disclosure, there is no restriction on the type of reference signal, which may be, for example, a reference signal for channel estimation, a reference signal for signal demodulation, and a reference signal for beam measurement.

[0163] In some embodiments of the present disclosure, a reference signal pattern is defined by a protocol, and the reference signal pattern is associated with the number of antenna ports. This means that a receiving device can determine the reference signal pattern by determining the number of ports receiving the reference signal. This disclosure does not limit the relationship between reference signals and reference signal patterns, which can be, for example, one-to-one or many-to-one. This means that each reference signal can uniquely correspond to a reference signal pattern, or multiple reference signals can correspond to one reference signal pattern.

[0164] Specifically, the parameters of the reference signal pattern include at least one of the following, and the following parameters are all positive integers: p , the delay domain coordinates of the reference signal sending position; k p , the Doppler domain coordinates of the reference signal sending position; l τ , the delay domain corresponds to the number of OTFS symbols occupied by the guard interval. For example, if the maximum delay extension is 10ms and the duration of every two OTFS symbols in the delay domain is 1ms, then l τ is 10; k v, the Doppler domain corresponds to the number of OTFS subcarriers occupied by the guard interval. The Doppler shift can be positive or negative. When the distance between the transmitting device and the receiving device becomes closer, the Doppler frequency of the transmitted signal increases, the wavelength decreases, and the Doppler shift is positive. In other words, when the distance between the transmitting device and the receiving device becomes farther, the Doppler frequency of the transmitted signal decreases, the wavelength increases, and the Doppler shift is negative.

[0165] Specifically, l p should satisfy the first condition: 0 < l p -l τ < l p < l p +l τ < M - 1, where M represents the number of time-domain OTFS symbols on a scheduling unit; k p should satisfy the second condition: 0 < k p -k v < k p < k p +k v < N - 1, where N represents the number of Doppler-domain OTFS subcarriers on a scheduling unit.

[0166] Specifically, in the embodiment with 1 antenna port, the delay-Doppler (DD) domain coordinates of the reference signal transmission position are (l p , k p ); the range of the time-domain coordinates of the guard interval is from l p -l τ to l p [[ID=​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​p ); The DD domain coordinates of the second reference signal transmission position are (l p +l τ +1,k p ); The range of the delay domain coordinates of the protection interval is l p -l τ to l p +2l τ +1, the range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +2k v The range of the delay domain coordinates of the data transmission location is 0 to l p -l τ -1 and l p +2l τ +2 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +2k v The specific setting method of the above parameters can refer to the embodiment shown in Figure 6, which will not be repeated here.

[0168] Specifically, in another embodiment in which the number of antenna ports is 2, the first reference signal sending position corresponds to the first antenna port, the second reference signal sending position corresponds to the second antenna port, and the DD domain coordinates of the first reference signal sending position are (l p , k p ); The DD domain coordinates of the second reference signal transmission position are (l p , k p +2k v +1); the range of the delay domain coordinate of the protection interval is l p -l τ to l p +l τ , the range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +4k v +1; the delay domain coordinates of the data transmission location range from 0 to l p -l τ -1 and l p +l τ +1 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +4k vThe specific setting method of the above parameters can be referred to the embodiment shown in FIG7 , which will not be described in detail here.

[0169] Specifically, in an embodiment in which the number of antenna ports is 4, the first reference signal sending position corresponds to the first antenna port, the second reference signal sending position corresponds to the second antenna port, the third reference signal sending position corresponds to the third antenna port, and the fourth reference signal sending position corresponds to the fourth antenna port. The DD domain coordinates of the first reference signal sending position are (l p , k p ); The DD domain coordinates of the second reference signal transmission position are (l p , k p +2k v +1), the DD domain coordinates of the third reference signal transmission position are (l p +l τ +1,k p ), the DD domain coordinates of the fourth reference signal sending position are (l p +l τ +1,k p +2k v +1); the range of the delay domain coordinate of the protection interval is l p -l τ to l p +2l τ +1, the range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +4k v +1; the delay domain coordinates of the data transmission location range from 0 to l p -l τ -1 and l p +2l τ +2 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +4k v The specific setting method of the above parameters can refer to the embodiment shown in Figure 8, which will not be repeated here.

[0170] Specifically, in some embodiments, on multiple scheduling units in the DD domain, the difference in the delay domain coordinates of the reference signal transmission positions corresponding to any two antenna ports is |nl τ +1|, where n is a positive integer greater than or equal to 1, and the difference in the Doppler domain coordinates of the reference signal transmission positions corresponding to any two antenna ports is |mk v +1|, where m is an even number greater than or equal to 2.

[0171] FIG12 is a flow chart of a communication method provided by an embodiment of the present disclosure, wherein the method is executed by a receiving device. Based on the above-mentioned embodiment, the communication method further includes the following steps:

[0172] Step 1201: Receive a signal sent by a scheduling unit of a transmitting end device based on a DD domain.

[0173] In some embodiments of the present disclosure, a receiving device may receive a signal sent by a transmitting device based on a scheduling unit in the DD domain to perform any one of channel estimation, demodulation, and beam measurement.

[0174] In some embodiments of the present disclosure, the horizontal coordinate of the scheduling unit is delay, and the vertical coordinate is Doppler.

[0175] Step 1202: Perform any one of channel estimation, demodulation, and beam measurement based on the signal.

[0176] In some embodiments of the present disclosure, the receiving device may perform any one of channel estimation, demodulation, and beam measurement on the signal.

[0177] Specifically, the receiving end device may perform related tasks based on the signal type, for example, the receiving end device receives the CSI-RS signal and performs channel estimation.

[0178] In summary, the pattern determination method provided in this disclosure is performed by a transmitting device and includes: receiving a signal transmitted by a scheduling unit based on the DD domain; and performing any one of channel estimation, demodulation, and beam measurement based on the signal. This disclosure adapts to OTFS-MIMO systems by receiving signals transmitted by a scheduling unit based on the DD domain and performing related tasks.

[0179] Figure 13 provides a flow chart of a communication interaction method. As shown in Figure 13, the interaction method may include the following steps:

[0180] Step 1301: The transmitting end device determines a reference signal pattern.

[0181] In some embodiments of the present disclosure, a reference signal pattern is used in an orthogonal time-frequency-space (OTFS) modulation system, and a guard interval is provided between a reference signal transmission position and a data transmission position in the reference signal pattern.

[0182] Step 1302: The transmitting device sends a reference signal pattern to the receiving device.

[0183] The principles of the above steps 1301-1302 are the same as the principles of the various steps in the embodiment shown in Figures 2-12 above. Please refer to the relevant description of Figures 2-12 and will not be repeated here.

[0184] In some embodiments, the above method may include the method described in the above embodiments of the transmitting device side and the receiving device side, which will not be repeated here.

[0185] In summary, according to the communication method provided by the present disclosure, through interaction between a transmitting device and a receiving device, the transmitting device determines a reference signal pattern, where the reference signal pattern is used in an Orthogonal Time-Frequency-Space (OTFS) modulation system, and a guard interval is provided between the reference signal transmission position and the data transmission position in the reference signal pattern. The transmitting device then transmits the reference signal pattern to the receiving device. The disclosed solution implements communication and transmission in an OTFS system by having the transmitting device determine the reference signal pattern and indicate the pattern to the receiving device.

[0186] FIG14 is a schematic structural diagram of a communication device 1400 provided in an embodiment of the present disclosure.

[0187] As shown in FIG7 , the communication apparatus 1400 includes a determining module 1410 for determining a reference signal pattern, wherein the reference signal pattern is used for orthogonal time-frequency-space (OTFS) modulation, and a guard interval is provided between a reference signal transmission position and a data transmission position in the reference signal pattern.

[0188] In summary, the communication device provided by the present disclosure includes a determination device for determining a reference signal pattern, wherein the reference signal pattern is used for orthogonal time-frequency-space (OTFS) modulation, and a guard interval is provided between the reference signal transmission position and the data transmission position in the reference signal pattern. Therefore, the communication method provided by the present disclosure determines the reference signal pattern so that the reference signal can be transmitted according to the determined pattern.

[0189] In some embodiments of the present disclosure, the determination module 1410 is configured to determine a reference signal pattern, wherein the reference signal pattern is used in an orthogonal time-frequency-space (OTFS) modulation system, and a guard interval is provided between a reference signal transmission position and a data transmission position in the reference signal pattern.

[0190] In some embodiments of the present disclosure, the determination module 1410 is further configured to determine the number of antenna ports; and determine a reference signal pattern corresponding to the number of antenna ports.

[0191] In some embodiments of the present disclosure, p , the delay domain coordinates of the reference signal sending position; k p , the Doppler domain coordinates of the reference signal sending position; l τ , the number of OTFS symbols occupied by the delay domain corresponding to the guard interval; k v , the number of OTFS subcarriers in the Doppler domain occupied by the guard interval in the Doppler domain.

[0192] In some embodiments of the present disclosure,p Satisfy the first condition: 0 < l p -l τ < l p < l p +l τ < M - 1, where M represents the number of OTFS symbols in the delay domain on a scheduling unit; k p Satisfy the second condition: 0 < k p -k v < k p < k p +k v < N - 1, where N represents the number of OTFS sub - carriers in the Doppler domain on a scheduling unit.

[0193] In some embodiments of the present disclosure, when the number of antenna ports is 1, the delay - Doppler (DD) domain coordinates of the reference signal transmission position are (l p , k p ); the range of the delay - domain coordinates of the guard interval is from l p -l τ to l p +l τ , and the range of the Doppler - domain coordinates of the guard interval is from k p -2k v to k p +2k v ; the range of the delay - domain coordinates of the data transmission position is from 0 to l p -l τ -1 and from l p +l τ +1 to M - 1, and the range of the Doppler - domain coordinates of the data transmission position is from 0 to k p -2k v -1 and from k p +2k v +1 to N - 1.

[0194] In some embodiments of the present disclosure, when the number of antenna ports is greater than or equal to 2, determining the reference signal pattern corresponding to the number of antenna ports includes: determining the first reference signal transmission position, where the first reference signal transmission position is the reference signal transmission position corresponding to the first antenna port; based on the first reference signal transmission position, determining the second reference signal transmission position, where the second reference signal transmission position is the reference signal transmission position corresponding to the second antenna port.

[0195] In some embodiments of the present disclosure, when the number of antenna ports is 2, the DD domain coordinates of the first reference signal transmission position are (l p , k p ); the DD domain coordinates of the second reference signal transmission position are (l p +l τ +1, kp ); The range of the delay domain coordinates of the protection interval is l p -l τ to l p +2l τ +1, the range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +2k v The range of the delay domain coordinates of the data transmission location is 0 to l p -l τ -1 and l p +2l τ +2 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +2k v +1 to N-1.

[0196] In some embodiments of the present disclosure, when the number of antenna ports is 2, the DD domain coordinates of the first reference signal transmission position are (l p , k p ); The DD domain coordinates of the second reference signal transmission position are (l p , k p +2k v +1); the range of the delay domain coordinate of the protection interval is l p -l τ to l p +l τ , the range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +4k v +1; the delay domain coordinates of the data transmission location range from 0 to l p -l τ -1 and l p +l τ +1 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +4k v +2 to N-1.

[0197] In some embodiments of the present disclosure, when the number of antenna ports is 4, the third reference signal transmission position corresponds to the third antenna port, the fourth reference signal transmission position corresponds to the fourth antenna port, and the DD domain coordinates of the first reference signal transmission position are (l p , k p ); The DD domain coordinates of the second reference signal transmission position are (lp , k p +2k v +1), the DD domain coordinates of the third reference signal transmission position are (l p +l τ +1,k p ), the DD domain coordinates of the fourth reference signal sending position are (l p +l τ +1,k p +2k v +1); the range of the delay domain coordinate of the protection interval is l p -l τ to l p +2l τ +1, the range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +4k v +1; the delay domain coordinates of the data transmission location range from 0 to l p -l τ -1 and l p +2l τ +2 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +4k v +2 to N-1.

[0198] In some embodiments of the present disclosure, on multiple scheduling units in the DD domain, the difference in the delay domain coordinates of the reference signal transmission positions corresponding to any two antenna ports is |nl τ +1|, where n is a positive integer greater than or equal to 1, and the difference in the Doppler domain coordinates of the reference signal transmission positions corresponding to any two antenna ports is |mk v +1|, where m is an even number greater than or equal to 2.

[0199] In some embodiments of the present disclosure, the determination module 1410 is further configured to indicate a reference signal pattern to a receiving device.

[0200] In some embodiments of the present disclosure, the determination module 1410 is further configured to map the reference signal pattern to a scheduling unit in the DD domain.

[0201] In some embodiments of the present disclosure, the communication device 1400 further includes a sending module 1420, and the sending module 1420 is configured to send a signal based on the scheduling unit.

[0202] FIG16 is a schematic structural diagram of a communication device 1600 provided in an embodiment of the present disclosure.

[0203] As shown in FIG. 16, the communication device 1600 includes a receiving module 1610 for receiving a reference signal pattern indicated by a transmitting device, where the reference signal pattern is used for orthogonal time-frequency-space OTFS modulation, and there is a guard interval between the reference signal transmission position and the data transmission position in the reference signal pattern.

[0204] In summary, according to the communication device provided by the present disclosure, it includes a receiving module for receiving a reference signal pattern indicated by a transmitting device, where the reference signal pattern is used for orthogonal time-frequency-space OTFS modulation, and there is a guard interval between the reference signal transmission position and the data transmission position in the reference signal pattern. It can be seen from this that the communication method provided by the present disclosure obtains the transmission signal information based on the pattern by receiving the reference signal pattern indication sent by the transmitting device, and performs any one of channel estimation, demodulation, and beam measurement.

[0205] In some embodiments of the present disclosure, the reference signal pattern is agreed upon by a protocol, and there is an association relationship between the reference signal pattern and the number of antenna ports.

[0206] In some embodiments of the present disclosure, the parameters of the reference signal pattern include at least one of the following: l p , the time-delay domain coordinates of the reference signal transmission position; k p , the Doppler domain coordinates of the reference signal transmission position; l τ , the number of OTFS symbols occupied by the guard interval in the time-delay domain; k v , the number of Doppler domain OTFS subcarriers occupied by the guard interval in the Doppler domain.

[0207] In some embodiments of the present disclosure, l p satisfies the first condition: 0 < l p -l τ < l p < l p +l τ < M - 1, where M represents the number of OTFS symbols in the time-delay domain on a scheduling unit; k p ... satisfies the second condition: 0 < k p -k v < k p < k p +k v < N - 1, where N represents the number of Doppler domain OTFS subcarriers on a scheduling unit.

[0208] In some embodiments of the present disclosure, when the number of antenna ports is 1, the delay-Doppler (DD) domain coordinates of the reference signal transmission position are (l p , k p ); the range of the time-delay domain coordinates of the guard interval is from l p -l τ to lp +l τ , the range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +2k v The range of the delay domain coordinates of the data transmission location is 0 to l p -l τ -1 and l p +l τ +1 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +2k v +1 to N-1.

[0209] In some embodiments of the present disclosure, when the number of antenna ports is 2, the first reference signal sending position corresponds to the first antenna port, the second reference signal sending position corresponds to the second antenna port, and the DD domain coordinates of the first reference signal sending position are (l p , k p ); The DD domain coordinates of the second reference signal transmission position are (l p +l τ +1,k p ); The range of the delay domain coordinates of the protection interval is l p -l τ to l p +2l τ +1, the range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +2k v The range of the delay domain coordinates of the data transmission location is 0 to l p -l τ -1 and l p +2l τ +2 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +2k v +1 to N-1.

[0210] In some embodiments of the present disclosure, when the number of antenna ports is 2, the first reference signal sending position corresponds to the first antenna port, the second reference signal sending position corresponds to the second antenna port, and the DD domain coordinates of the first reference signal sending position are (l p , k p ); The DD domain coordinates of the second reference signal transmission position are (l p , k p+2k v +1); the range of the delay domain coordinate of the protection interval is l p -l τ to l p +l τ , the range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +4k v +1; the delay domain coordinates of the data transmission location range from 0 to l p -l τ -1 and l p +l τ +1 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +4k v +2 to N-1.

[0211] In some embodiments of the present disclosure, when the number of antenna ports is 4, the first reference signal sending position corresponds to the first antenna port, the second reference signal sending position corresponds to the second antenna port, the third reference signal sending position corresponds to the third antenna port, and the fourth reference signal sending position corresponds to the fourth antenna port. The DD domain coordinates of the first reference signal sending position are (l p , k p ); The DD domain coordinates of the second reference signal transmission position are (l p , k p +2k v +1), the DD domain coordinates of the third reference signal transmission position are (l p +l τ +1,k p ), the DD domain coordinates of the fourth reference signal sending position are (l p +l τ +1,k p +2k v +1); the range of the delay domain coordinate of the protection interval is l p -l τ to l p +2l τ +1, the range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +4k v +1; the delay domain coordinates of the data transmission location range from 0 to l p -l τ -1 and l p +2l τ+2 to M-1, the range of the Doppler domain coordinates of the data transmission position is from 0 to k p -2k v -1 and k p +4k v +2 to N-1.

[0212] In some embodiments of the present disclosure, on multiple scheduling units in the DD domain, the difference in the time delay domain coordinates of the reference signal transmission positions corresponding to any two antenna ports is |nl τ +1|, where n is a positive integer greater than or equal to 1, and the difference in the Doppler domain coordinates of the reference signal transmission positions corresponding to any two antenna ports is |mk v +1|, where m is an even number greater than or equal to 2.

[0213] In some embodiments of the present disclosure, the receiving module 1610 is further configured to receive a signal transmitted by a transmitting end device based on a scheduling unit in the DD domain, wherein the reference signal pattern is mapped to the scheduling unit.

[0214] In some embodiments of the present disclosure, the communication device 1600 further includes a processing module 1620, and the processing module 1620 is configured to perform any one of channel estimation, demodulation, and beam measurement based on the signal.

[0215] The present disclosure also provides a reference signal pattern, which is used for orthogonal time-frequency-space OTFS modulation, and there is a guard interval between the reference signal transmission position and the data transmission position in the reference signal pattern.

[0216] In some embodiments of the present disclosure, the reference signal pattern is agreed by the protocol, and the reference signal pattern has an association relationship with the number of antenna ports.

[0217] In some embodiments of the present disclosure, the parameters of the reference signal pattern include at least one of the following: l p , the time delay domain coordinates of the reference signal transmission position; k p , the Doppler domain coordinates of the reference signal transmission position; l τ , the number of OTFS symbols occupied by the guard interval corresponding to the time delay domain; k v , the number of Doppler domain OTFS subcarriers occupied by the guard interval corresponding to the Doppler domain.

[0218] In some embodiments of the present disclosure, l p satisfies the first condition: 0 < l p -l τ < l p < l p +l τ < M-1, M represents the number of time delay domain OTFS symbols on a scheduling unit; k p satisfies the second condition: 0 < kp -k v <k p <k p +k v <N - 1, where N represents the number of Doppler domain OTFS sub - carriers on a scheduling unit.

[0219] In some embodiments of the present disclosure, the number of antenna ports is 1, and the reference signal pattern is as shown in FIG. 4 above. The time - delay - Doppler (DD) domain coordinates of the reference signal transmission position are (l p , k p ); the range of the time - delay domain coordinates of the guard interval is from l p -l τ to l p +l τ , and the range of the Doppler domain coordinates of the guard interval is from k p -2k v to k p +2k v ; the range of the time - delay domain coordinates of the data transmission position is from 0 to l p -l τ -1 and from l p +l τ +1 to M - 1, and the range of the Doppler domain coordinates of the data transmission position is from 0 to k p -2k v -1 and from k p +2k v +1 to N - 1. For specific descriptions, reference may be made to the relevant embodiments shown in FIG. 4, which will not be elaborated here.

[0220] In some embodiments of the present disclosure, the number of antenna ports is 2, and the reference signal pattern is as shown in FIG. 6 above. The first reference signal transmission position corresponds to the first antenna port, and the second reference signal transmission position corresponds to the second antenna port. The DD domain coordinates of the first reference signal transmission position are (l p , k p ); the DD domain coordinates of the second reference signal transmission position are (l p +l τ +1, k p ); the range of the time - delay domain coordinates of the guard interval is from l p -l τ to l p +2l τ +1, and the range of the Doppler domain coordinates of the guard interval is from k p -2k v to k p +2k v ; the range of the time - delay domain coordinates of the data transmission position is from 0 to l p -l τ -1 and from l p+2l τ +2 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +2k v +1 to N-1. The detailed description thereof can be referred to the relevant embodiment shown in FIG6 , which will not be repeated here.

[0221] In some embodiments of the present disclosure, the number of antenna ports is 2, and the reference signal pattern thereof may also be as shown in FIG. 7 above. The first reference signal sending position corresponds to the first antenna port, and the second reference signal sending position corresponds to the second antenna port. The DD domain coordinates of the first reference signal sending position are (l p , k p ); The DD domain coordinates of the second reference signal transmission position are (l p , k p +2k v +1); the range of the delay domain coordinate of the protection interval is l p -l τ to l p +l τ , the range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +4k v +1; the delay domain coordinates of the data transmission location range from 0 to l p -l τ -1 and l p +l τ +1 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +4k v The detailed description can be made with reference to the relevant embodiment shown in FIG7 , which will not be repeated here.

[0222] In some embodiments of the present disclosure, the number of antenna ports is 4, and the reference signal pattern thereof may also be as shown in FIG8 above. The first reference signal sending position corresponds to the first antenna port, the second reference signal sending position corresponds to the second antenna port, the third reference signal sending position corresponds to the third antenna port, and the fourth reference signal sending position corresponds to the fourth antenna port. The DD domain coordinates of the first reference signal sending position are (l p , k p ); The DD domain coordinates of the second reference signal transmission position are (l p , k p +2k v +1), the DD domain coordinates of the third reference signal transmission position are (l p +lτ +1,k p ), the DD domain coordinates of the fourth reference signal sending position are (l p +l τ +1,k p +2k v +1); the range of the delay domain coordinate of the protection interval is l p -l τ to l p +2l τ +1, the range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +4k v +1; the delay domain coordinates of the data transmission location range from 0 to l p -l τ -1 and l p +2l τ +2 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +4k v The detailed description can be referred to the relevant embodiment shown in FIG8 , which will not be repeated here.

[0223] In some embodiments of the present disclosure, on multiple scheduling units in the DD domain, the difference in the delay domain coordinates of the reference signal transmission positions corresponding to any two antenna ports is |nl τ +1|, where n is a positive integer greater than or equal to 1, and the difference in the Doppler domain coordinates of the reference signal transmission positions corresponding to any two antenna ports is |mk v +1|, where m is an even number greater than or equal to 2.

[0224] Please refer to Figure 18, which is a schematic diagram of the structure of a communication device 1800 provided in an embodiment of the present application. Communication device 1800 can be a network device or a terminal device, or a chip, chip system, or processor that supports a network device to implement the above-mentioned method, or a chip, chip system, or processor that supports a terminal device to implement the above-mentioned method. This device can be used to implement the method described in the above-mentioned method embodiment, and details can be found in the description of the above-mentioned method embodiment.

[0225] The communication device 1800 may include one or more processors 1801. The processor 1801 may be a general-purpose processor or a dedicated processor. For example, it may be a baseband processor or a central processing unit (CPU). The baseband processor may be used to process communication protocols and communication data, while the CPU may be used to control a communication device (e.g., a base station, a baseband chip, a terminal device, a terminal device chip, a DU or CU, etc.), execute computer programs, and process computer program data.

[0226] Optionally, the communication device 1800 may further include one or more memories 1802, on which a computer program 1804 may be stored. The processor 1801 executes the computer program 1804, causing the communication device 1800 to perform the method described in the above method embodiment. Optionally, the memory 1802 may also store data. The communication device 1800 and the memory 1802 may be provided separately or integrated together.

[0227] Optionally, the communication device 1800 may further include a transceiver 1805 and an antenna 1806. The transceiver 1805 may be referred to as a transceiver unit, a transceiver, or a transceiver circuit, and is configured to implement transceiver functions. The transceiver 1805 may include a receiver and a transmitter. The receiver may be referred to as a receiver or a receiving circuit, and is configured to implement a receiving function; the transmitter may be referred to as a transmitter or a transmitting circuit, and is configured to implement a transmitting function.

[0228] Optionally, the communication device 1800 may further include one or more interface circuits 1807. The interface circuit 1807 is configured to receive code instructions and transmit the instructions to the processor 1801. The processor 1801 executes the code instructions to enable the communication device 1800 to perform the method described in the above method embodiment.

[0229] In one implementation, processor 1801 may include a transceiver for implementing receiving and transmitting functions. For example, the transceiver may be a transceiver circuit, an interface, or an interface circuit. The transceiver circuit, interface, or interface circuit for implementing the receiving and transmitting functions may be separate or integrated. The transceiver circuit, interface, or interface circuit may be used for reading and writing code / data, or may be used for transmitting or delivering signals.

[0230] In one implementation, processor 1801 may store a computer program 1803. Computer program 1803, when executed on processor 1801, enables communication device 1800 to perform the method described in the above method embodiment. Computer program 1803 may be embedded in processor 1801, in which case processor 1801 may be implemented by hardware.

[0231] In one implementation, the communication device 1800 may include a circuit that can implement the functions of sending, receiving, or communicating in the aforementioned method embodiments. The processor and transceiver described in this application can be implemented on an integrated circuit (IC), an analog IC, a radio frequency integrated circuit RFIC, a mixed signal IC, an application specific integrated circuit (ASIC), a printed circuit board (PCB), an electronic device, etc. The processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), N-type metal oxide semiconductor (NMOS), P-type metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0232] The communication device described in the above embodiments may be a network device or a terminal device, but the scope of the communication device described in this application is not limited thereto, and the structure of the communication device may not be limited to FIG18. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be:

[0233] (1) An independent integrated circuit (IC), or chip, or chip system or subsystem;

[0234] (2) a collection of one or more ICs, optionally including a storage component for storing data and computer programs;

[0235] (3) ASIC, such as modem;

[0236] (4) Modules that can be embedded in other devices;

[0237] (5) Receivers, terminal devices, intelligent terminal devices, cellular phones, wireless devices, handheld devices, mobile units, vehicle-mounted devices, network devices, cloud devices, artificial intelligence devices, etc.;

[0238] (6)Others, etc.

[0239] If the communication device can be a chip or a chip system, please refer to the schematic diagram of the chip structure shown in Figure 19. The chip shown in Figure 19 includes a processor 1901 and an interface 1902. The number of processors 1901 can be one or more, and the number of interfaces 1902 can be multiple.

[0240] Optionally, the chip further includes a memory 1903, which is used to store necessary computer programs and data.

[0241] Those skilled in the art will also appreciate that the various illustrative logical blocks and steps listed in the embodiments of the present application can be implemented by electronic hardware, computer software, or a combination of both. Whether such functions are implemented by hardware or software depends on the specific application and the design requirements of the entire system. Those skilled in the art may use various methods to implement the functions for each specific application, but such implementation should not be construed as exceeding the scope of protection of the embodiments of the present application.

[0242] The present application also provides a readable storage medium having instructions stored thereon, which implement the functions of any of the above method embodiments when executed by a computer.

[0243] Figure 20 is a structural diagram of a communication system provided by an embodiment of the present disclosure. As shown in Figure 20, the communication system includes: a transmitting end device for executing the methods shown in Figures 2 to 10 above; and a receiving end device for executing the methods shown in Figures 11 and 12 above.

[0244] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When software is used for implementation, it can be implemented in whole or in part in the form of 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, the process or function according to the embodiment of the present application is generated in whole or in part. 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 transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program can be transmitted from a website, computer, server or data center to another website, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrations. Available media may be magnetic media (eg, floppy disks, hard disks, tapes), optical media (eg, high-density digital video discs (DVDs)), or semiconductor media (eg, solid state disks (SSDs)).

[0245] Those skilled in the art will understand that the various numerical numbers such as first and second involved in this application are only for the convenience of description and are not used to limit the scope of the embodiments of this application, and also indicate the order of precedence.

[0246] In this application, at least one can also be described as one or more, and multiple can be two, three, four or more, which is not limited in this application. In the embodiments of this application, for a technical feature, the technical features in the technical feature are distinguished by "first", "second", "third", "A", "B", "C" and "D", and there is no order of precedence or size between the technical features described by "first", "second", "third", "A", "B", "C" and "D".

[0247] The correspondences shown in the tables in this application can be configured or predefined. The values ​​of the information in each table are merely examples and can be configured to other values, which are not limited by this application. When configuring the correspondence between information and parameters, it is not necessary to configure all the correspondences shown in each table. For example, in the tables in this application, the correspondences shown in certain rows may not be configured. For another example, appropriate modifications and adjustments can be made based on the above tables, such as splitting, merging, etc. The names of the parameters shown in the titles of the above tables can also use other names that are understandable to the communication device, and the values ​​or representations of the parameters can also use other values ​​or representations that are understandable to the communication device. When implementing the above tables, other data structures can also be used, such as arrays, queues, containers, stacks, linear lists, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables, or hash tables.

[0248] The predefined in this application may be understood as defined, predefined, stored, pre-stored, pre-negotiated, pre-configured, solidified, or pre-burned.

[0249] Those skilled in the art will appreciate that the units and algorithm steps of each example 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 performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0250] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0251] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A communication method, It is characterized in that The method is performed by a transmitting end device, and the method includes: Determine the reference signal pattern, The reference signal pattern is used in an orthogonal time-frequency-space (OTFS) modulation system, and a protection interval is provided between a reference signal sending position and a data sending position in the reference signal pattern.

2. The method according to claim 1, It is characterized in that The determining of the reference signal pattern comprises: Determine the number of antenna ports, where the number of antenna ports is a positive integer; Determine a reference signal pattern corresponding to the number of antenna ports.

3. The method according to claim 2, It is characterized in that The parameters of the reference signal pattern include at least one of the following: l p , the delay domain coordinates of the reference signal transmission position; k p , the Doppler domain coordinates of the reference signal transmission position; l τ , the number of OTFS symbols occupied by the guard interval corresponding to the delay domain; k v , the number of OTFS subcarriers in the Doppler domain occupied by the guard interval in the Doppler domain.

4. The method according to claim 3, It is characterized in that The l p The first condition is met, and the first condition includes: 0 < l p -l τ < l p < l p +l τ < M - 1, where M represents the number of delay-domain OTFS symbols on a scheduling unit; The k p The second condition is met, wherein the second condition includes: 0 < k p -k v < k p < k p +k v < N - 1, where N represents the number of Doppler domain OTFS subcarriers on a scheduling unit.

5. The method according to claim 4, It is characterized in that When the number of antenna ports is 1, the delay-Doppler DD domain coordinates of the reference signal transmission position are (l p , k p ); The range of the delay domain coordinates of the protection interval is l p -l τ To p +l τ The range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +2k v ; The delay domain coordinates of the data transmission location range from 0 to 1 p -l τ -1 and l p +l τ +1 to M-1, and the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +2k v +1 to N-1.

6. The method according to claim 4, It is characterized in that When the number of antenna ports is greater than or equal to 2, determining the reference signal pattern corresponding to the number of antenna ports includes: Determine a first reference signal sending position, where the first reference signal sending position is a reference signal sending position corresponding to the first antenna port; Based on the first reference signal sending position, a second reference signal sending position is determined, where the second reference signal sending position is the reference signal sending position corresponding to the second antenna port.

7. The method according to claim 6, It is characterized in that When the number of antenna ports is 2, the DD domain coordinates of the first reference signal sending position are (l p , k p ); The DD domain coordinates of the second reference signal transmission position are (l p +l τ +1, k p ); The range of the delay domain coordinates of the protection interval is l p -l τ To p +2l τ +1, the range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +2k v ; The delay domain coordinates of the data transmission location range from 0 to 1 p -l τ -1 and l p +2l τ +2 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +2k v +1 to N-1.

8. The method according to claim 6, It is characterized in that When the number of antenna ports is 2, the DD domain coordinates of the first reference signal sending position are (l p , k p ); The DD domain coordinates of the second reference signal transmission position are (l p , k p +2k v +1); The range of the delay domain coordinates of the protection interval is l p -l τ To p +l τ The range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +4k v +1; The delay domain coordinates of the data transmission location range from 0 to 1 p -l τ -1 and l p +l τ +1 to M-1, and the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +4k v +2 to N-1.

9. The method according to claim 6, It is characterized in that When the number of antenna ports is 4, the third reference signal sending position corresponds to the third antenna port, the fourth reference signal sending position corresponds to the fourth antenna port, and the DD domain coordinates of the first reference signal sending position are (l p , k p ); The DD domain coordinates of the second reference signal transmission position are (l p , k p +2k v +1), the DD domain coordinates of the third reference signal sending position are (l p +l τ +1, k p ), the DD domain coordinates of the fourth reference signal sending position are (l p +l τ +1, k p +2k v +1); The range of the delay domain coordinates of the protection interval is l p -l τ To p +2l τ +1, the range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +4k v +1; The delay domain coordinates of the data transmission location range from 0 to 1 p -l τ -1 and l p +2l τ +2 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +4k v +2 to N-1.

10. The method according to any one of claims 1 to 9, It is characterized in that In multiple scheduling units in the DD domain, the difference in the delay domain coordinates of the reference signal transmission positions corresponding to any two antenna ports is |nl τ +1|, where n is a positive integer greater than or equal to 1, and the difference in the Doppler domain coordinates of the reference signal transmission positions corresponding to any two antenna ports is |mk v +1|, where m is an even number greater than or equal to 2.

11. The method according to any one of claims 1 to 10, It is characterized in that The method further comprises: The reference signal pattern is indicated to a receiving end device.

12. The method according to any one of claims 1 to 11, It is characterized in that The method further comprises: Mapping the reference signal pattern to a scheduling unit in the DD domain; A signal is sent based on the scheduling unit.

13. A communication method, It is characterized in that The method is performed by a receiving end device, and the method includes: Receive the reference signal pattern indicated by the transmitting end device, The reference signal pattern is used in an orthogonal time-frequency-space (OTFS) modulation system, and a protection interval is provided between a reference signal sending position and a data sending position in the reference signal pattern.

14. The method according to claim 13, It is characterized in that The reference signal pattern is agreed upon by a protocol, and the reference signal pattern is associated with the number of antenna ports.

15. The method according to claim 13 or 14, It is characterized in that The parameters of the reference signal pattern include at least one of the following: l p , the delay domain coordinates of the reference signal transmission position; k p , the Doppler domain coordinates of the reference signal transmission position; l τ , the number of OTFS symbols occupied by the guard interval corresponding to the delay domain; k v , the number of OTFS subcarriers in the Doppler domain occupied by the corresponding guard interval in the Doppler domain.

16. The method according to claim 15, It is characterized in that The l p The first condition is met: 0 < l p -l τ < l p < l p +l τ < M - 1, where M represents the number of delay-domain OTFS symbols on a scheduling unit; The k p The second condition is met: 0 < k p -k v < k p < k p +k v < N - 1, where N represents the number of Doppler-domain OTFS subcarriers on a scheduling unit.

17. The method according to claim 16, It is characterized in that When the number of antenna ports is 1, the delay-Doppler DD domain coordinates of the reference signal transmission position are (l p , k p ); The range of the delay domain coordinates of the protection interval is l p -l τ To p +l τ The range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +2k v ; The delay domain coordinates of the data transmission location range from 0 to 1 p -l τ -1 and l p +l τ +1 to M-1, and the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +2k v +1 to N-1.

18. The method according to claim 16, It is characterized in that When the number of antenna ports is 2, the first reference signal sending position corresponds to the first antenna port, the second reference signal sending position corresponds to the second antenna port, and the DD domain coordinates of the first reference signal sending position are (l p , k p ); The DD domain coordinates of the second reference signal transmission position are (l p +l τ +1, k p ); The range of the delay domain coordinates of the protection interval is l p -l τ To p +2l τ +1, the range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +2k v ; The delay domain coordinates of the data transmission location range from 0 to 1 p -l τ -1 and l p +2l τ +2 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +2k v +1 to N-1.

19. The method according to claim 16, It is characterized in that When the number of antenna ports is 2, the first reference signal sending position corresponds to the first antenna port, the second reference signal sending position corresponds to the second antenna port, and the DD domain coordinates of the first reference signal sending position are (l p , k p ); The DD domain coordinates of the second reference signal transmission position are (l p , k p +2k v +1); The range of the delay domain coordinates of the protection interval is l p -l τ To p +l τ The range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +4k v +1; The delay domain coordinates of the data transmission location range from 0 to 1 p -l τ -1 and l p +l τ +1 to M-1, and the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +4k v +2 to N-1.

20. The method according to claim 16, It is characterized in that When the number of antenna ports is 4, the first reference signal sending position corresponds to the first antenna port, the second reference signal sending position corresponds to the second antenna port, the third reference signal sending position corresponds to the third antenna port, and the fourth reference signal sending position corresponds to the fourth antenna port. The DD domain coordinates of the first reference signal sending position are (l p , k p ); The DD domain coordinates of the second reference signal transmission position are (l p , k p +2k v +1), the DD domain coordinates of the third reference signal sending position are (l p +l τ +1, k p ), the DD domain coordinates of the fourth reference signal sending position are (l p +l τ +1, k p +2k v +1); The range of the delay domain coordinates of the protection interval is l p -l τ To p +2l τ +1, the range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +4k v +1; The delay domain coordinates of the data transmission location range from 0 to 1 p -l τ -1 and l p +2l τ +2 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +4k v +2 to N-1.

21. The method according to any one of claims 13 to 20, It is characterized in that In multiple scheduling units in the DD domain, the difference in the delay domain coordinates of the reference signal transmission positions corresponding to any two antenna ports is |nl τ +1|, where n is a positive integer greater than or equal to 1, and the difference in the Doppler domain coordinates of the reference signal transmission positions corresponding to any two antenna ports is |mk v +1|, where m is an even number greater than or equal to 2.

22. The method according to any one of claims 13 to 21, It is characterized in that The method further comprises: receiving a signal sent by the scheduling unit of the transmitting end device based on the DD domain, Wherein, the reference signal pattern is mapped to the scheduling unit.

23. The method according to claim 22, It is characterized in that The method further comprises: Based on the signal, any one of channel estimation, demodulation, and beam measurement is performed.

24. A communication device, It is characterized in that The device comprises a determining module, configured to: Determine the reference signal pattern, The reference signal pattern is used for orthogonal time-frequency-space (OTFS) modulation, and a guard interval is provided between a reference signal sending position and a data sending position in the reference signal pattern.

25. A communication device, It is characterized in that The device comprises a receiving module, which is used for: Receive the reference signal pattern indicated by the transmitting end device, The reference signal pattern is used for orthogonal time-frequency-space (OTFS) modulation, and a guard interval is provided between a reference signal sending position and a data sending position in the reference signal pattern.

26. A reference signal pattern, It is characterized in that The reference signal pattern is used for orthogonal time-frequency-space (OTFS) modulation, and a guard interval is provided between a reference signal sending position and a data sending position in the reference signal pattern.

27. The reference signal pattern according to claim 26, It is characterized in that The reference signal pattern is agreed upon by a protocol, and the reference signal pattern is associated with the number of antenna ports.

28. The reference signal pattern according to claim 27, It is characterized in that The reference signal pattern includes at least one of the following parameters: l p , the delay domain coordinates of the reference signal transmission position; k p , the Doppler domain coordinates of the location where the reference signal is sent; l τ , the number of OTFS symbols occupied by the guard interval corresponding to the delay domain; k v , the number of OTFS subcarriers in the Doppler domain occupied by the corresponding guard interval in the Doppler domain.

29. The reference signal pattern according to claim 28, It is characterized in that The l p The first condition is met: 0 < l p -l τ < l p < l p +l τ < M - 1, where M represents the number of time-delay domain OTFS symbols on a scheduling unit; The k p The second condition is met: 0 < k p -k v < k p < k p +k v < N - 1, where N represents the number of Doppler-domain OTFS subcarriers on a scheduling unit.

30. The reference signal pattern according to claim 29, It is characterized in that When the number of antenna ports is 1, the delay-Doppler DD domain coordinates of the reference signal transmission position are (l p , k p ); The range of the delay domain coordinates of the protection interval is l p -l τ To p +l τ The range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +2k v ; The delay domain coordinates of the data transmission location range from 0 to 1 p -l τ -1 and l p +l τ +1 to M-1, and the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +2k v +1 to N-1.

31. The reference signal pattern according to claim 29, It is characterized in that When the number of antenna ports is 2, the first reference signal sending position corresponds to the first antenna port, the second reference signal sending position corresponds to the second antenna port, and the DD domain coordinates of the first reference signal sending position are (l p , k p ); The DD domain coordinates of the second reference signal transmission position are (l p +l τ +1, k p ); The range of the delay domain coordinates of the protection interval is l p -l τ To p +2l τ +1, the range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +2k v ; The delay domain coordinates of the data transmission location range from 0 to 1 p -l τ -1 and l p +2l τ +2 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +2k v +1 to N-1.

32. The reference signal pattern according to claim 29, It is characterized in that When the number of antenna ports is 2, the first reference signal sending position corresponds to the first antenna port, the second reference signal sending position corresponds to the second antenna port, and the DD domain coordinates of the first reference signal sending position are (l p , k p ); The DD domain coordinates of the second reference signal transmission position are (l p , k p +2k v +1); The range of the delay domain coordinates of the protection interval is l p -l τ To p +l τ The range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +4k v +1; The delay domain coordinates of the data transmission location range from 0 to 1 p -l τ -1 and l p +l τ +1 to M-1, and the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +4k v +2 to N-1.

33. The reference signal pattern according to claim 29, It is characterized in that When the number of antenna ports is 4, the first reference signal sending position corresponds to the first antenna port, the second reference signal sending position corresponds to the second antenna port, the third reference signal sending position corresponds to the third antenna port, and the fourth reference signal sending position corresponds to the fourth antenna port. The DD domain coordinates of the first reference signal sending position are (l p , k p ); The DD domain coordinates of the second reference signal transmission position are (l p , k p +2k v +1), the DD domain coordinates of the third reference signal sending position are (l p +l τ +1, k p ), the DD domain coordinates of the fourth reference signal sending position are (l p +l τ +1, k p +2k v +1); The range of the delay domain coordinates of the protection interval is l p -l τ To p +2l τ +1, the range of the Doppler domain coordinates of the guard interval is k p -2k v to k p +4k v +1; The delay domain coordinates of the data transmission location range from 0 to 1 p -l τ -1 and l p +2l τ +2 to M-1, the Doppler domain coordinates of the data transmission location range from 0 to k p -2k v -1 and k p +4k v +2 to N-1.

34. The reference signal pattern according to any one of claims 26 to 33, It is characterized in that In multiple scheduling units in the DD domain, the difference in the delay domain coordinates of the reference signal transmission positions corresponding to any two antenna ports is |nl τ +1|, where n is a positive integer greater than or equal to 1, and the difference in the Doppler domain coordinates of the reference signal transmission positions corresponding to any two antenna ports is |mk v +1|, where m is an even number greater than or equal to 2.

35. A communication device, in, include: Transceiver; Memory; A processor is connected to the transceiver and the memory, respectively, and is configured to control the wireless signal reception and transmission of the transceiver by executing computer executable instructions on the memory, and can implement any one of the methods of claims 1-23.

36. A computer storage medium, in, The computer storage medium stores computer executable instructions; after the computer executable instructions are executed by the processor, the method described in any one of claims 1 to 23 can be implemented.

37. A communication system, It is characterized in that include: A transmitting end device and a receiving end device, wherein the transmitting end device is used to execute the method as described in any one of claims 1 to 12; and the receiving end device is used to execute the method as described in any one of claims 13 to 23.

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