Communication method, device, equipment, storage medium and system

Abstract

The invention provides a communication method, device and system, equipment and a storage medium, and belongs to the technical field of communication. The method comprises: a network device sending a synchronous broadcast block (SSB) signal to a terminal, the SSB signal being converted from a time delay Doppler (DD) domain of an orthogonal time frequency space (OTFS) system to a time frequency domain of an orthogonal frequency division multiplexing (OFDM) system. Therefore, the SSB is mapped in the delay-Doppler DD domain to be sent and received, and meanwhile, the reliability and accuracy of fast and frequent signal switching in a high-speed moving scene are ensured.

Description

Communication method, device, equipment, storage medium and system Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular to communication methods, devices, equipment, storage media, and systems. Background Art

[0002] Orthogonal Time-Frequency-Space (OTFS) modulation is a two-dimensional modulation scheme designed in the delay-Doppler (DD) domain. Through two-dimensional transformation, it can convert a dual-dispersion channel into a nearly flat-fading channel in the DD domain. However, there is no known solution for mapping the synchronization signal block (SSB) in the DD domain for transmission and reception.

[0003] Summary of the Invention

[0004] The communication method, apparatus, device, storage medium, and system proposed in this disclosure transmit synchronization signal block (SSB) signals from a network device to a terminal. The SSB signals are converted from the delay-Doppler (DD) domain of an orthogonal time-frequency-space (OTFS) system to the time-frequency domain of an orthogonal frequency-division multiplexing (OFDM) system. This allows the synchronization signal blocks (SSBs) to be mapped into the delay-Doppler (DD) domain for transmission and reception, while ensuring the reliability and accuracy of rapid and frequent signal switching in high-speed mobility scenarios.

[0005] According to a first aspect of an embodiment of the present disclosure, a communication method is proposed, which is executed by a network device. The method includes: sending a synchronized broadcast block SSB signal to a terminal, wherein the SSB signal is converted from the delay-Doppler (DD) domain of an orthogonal time-frequency-space (OTFS) system to the time-frequency domain of an orthogonal frequency-division multiplexing (OFDM) system.

[0006] According to a second aspect of an embodiment of the present disclosure, a communication method is proposed, which is executed by a terminal, and the method includes: receiving a synchronous broadcast block SSB signal sent by a network device, wherein the SSB signal is converted from the delay-Doppler DD domain of an orthogonal time-frequency-space (OTFS) system to the time-frequency domain of an orthogonal frequency-division multiplexing (OFDM) system.

[0007] According to a third aspect of an embodiment of the present disclosure, a communication device is proposed, which includes a transceiver module for sending a synchronized broadcast block (SSB) signal to a terminal, wherein the SSB signal is converted from the delay-Doppler (DD) domain of an orthogonal time-frequency-space (OTFS) system to the time-frequency domain of an orthogonal frequency-division multiplexing (OFDM) system.

[0008] According to a fourth aspect of an embodiment of the present disclosure, a communication device is proposed, which includes a transceiver module for: receiving a synchronized broadcast block SSB signal sent by a network device, wherein the SSB signal is converted from the delay-Doppler (DD) domain of an orthogonal time-frequency-space (OTFS) system to the time-frequency domain of an orthogonal frequency-division multiplexing (OFDM) system.

[0009] According to the fifth aspect of the embodiment of the present disclosure, a communication device is proposed, including: 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, and can implement the communication method described in any one of the first and second aspects.

[0010] According to the sixth aspect of an embodiment of the present disclosure, a storage medium is proposed, which stores instructions, and is characterized in that when the instructions are executed on a communication device, the communication device executes the communication method as described in any one of the first and second aspects.

[0011] According to a seventh aspect of an embodiment of the present disclosure, a communication system is proposed, including a network device and a terminal, wherein the network device is configured to implement the method described in the first aspect, and the terminal is configured to implement the method described in the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] 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:

[0013] FIG1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present disclosure;

[0014] FIG2 is a flow chart of a communication method provided by an embodiment of the present disclosure;

[0015] 2a-2b are diagrams illustrating an example arrangement of an SSB signal in a DD domain according to an embodiment of the present disclosure;

[0016] 3a-3c are flowcharts of a communication method provided by an embodiment of the present disclosure;

[0017] 4a-4c are schematic flow charts of a communication method provided in an embodiment of the present disclosure;

[0018] FIG5 is a flow chart of a communication method provided by an embodiment of the present disclosure;

[0019] FIG6a is a schematic structural diagram of a communication device provided by an embodiment of the present disclosure;

[0020] FIG6 b is a schematic structural diagram of a communication device provided by an embodiment of the present disclosure;

[0021] FIG7a is a schematic structural diagram of a communication device provided by an embodiment of the present disclosure;

[0022] FIG7 b is a schematic structural diagram of a chip provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0023] The method disclosed in the present invention can be used to achieve the technical problem of "mapping the synchronization signal block SSB in the delay-Doppler DD domain for sending and receiving".

[0024] The embodiments of the present disclosure provide a communication method, apparatus, device, storage medium, and system.

[0025] In a first aspect, an embodiment of the present disclosure provides a communication method, which is performed by a network device and includes:

[0026] A synchronous broadcast block SSB signal is sent to the terminal, wherein the SSB signal is converted from the delay-Doppler (DD) domain of the orthogonal time-frequency-space (OTFS) system to the time-frequency domain of the orthogonal frequency-division multiplexing (OFDM) system.

[0027] In the above embodiment, the network device transmits a synchronization signal block (SSB) signal to the terminal. The transmitted SSB signal is converted from the delay-Doppler (DD) domain to the time-frequency domain, thereby transmitting the synchronization signal block (SSB) mapped to the delay-Doppler (DD) domain. This method can ensure the reliability and accuracy of rapid and frequent signal switching in high-speed mobility scenarios.

[0028] In conjunction with some embodiments of the first aspect, in some embodiments, determining the SSB signal includes at least one of the following:

[0029] Determine a first parameter corresponding to the primary synchronization signal PSS and / or PSS in the SSB signal; determine a second parameter corresponding to the secondary synchronization signal SSS and / or SSS in the SSB signal; based on the first parameter and the second parameter, determine the physical broadcast channel PBCH in the SSB signal; wherein the first parameter and / or the second parameter are used to calculate the physical cell address PCI.

[0030] In the above embodiment, the network device can accurately determine the SSB signal and the accessed physical cell address by determining the above parameters and channels.

[0031] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0032] Determine a third parameter, where the third parameter is used to identify the size of resources occupied by the SSB signal in the DD domain, and the third parameter includes the number of OTFS symbols occupied by the SSB signal in the delay domain and the number of OTFS subcarriers occupied in the Doppler domain.

[0033] In the above embodiment, the network device determines the size of the resources occupied by the SSB signal in the DD domain by determining the third parameter, so that the SSB signal can be mapped in the DD domain in an appropriate manner.

[0034] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0035] Based on the protocol agreement, determine the mapping position and / or mapping order of the SSB signal on the DD domain scheduling unit; map the SSB signal to the scheduling unit of the DD domain according to the mapping position and / or mapping order.

[0036] In the above embodiment, the network device expands the scope of application of the method for mapping SSB signals by determining the mapping position and / or mapping order of the SSB signal on the DD domain scheduling unit, and mapping the SSB signal to the scheduling unit of the DD domain according to the mapping position and / or mapping order.

[0037] In conjunction with some embodiments of the first aspect, in some embodiments, determining a mapping position of the SSB signal on the DD domain scheduling unit includes at least one of the following:

[0038] Determine the mapping position of the PSS in the DD domain; determine the mapping position of the SSS in the DD domain; determine the mapping position of the PBCH in the DD domain; determine the position of the protection symbols of any one of the PSS, SSS and PBCH, the protection symbols including the delay domain protection symbols and the Doppler domain protection symbols.

[0039] In combination with some embodiments of the first aspect, in some embodiments, the PSS, SSS, and PBCH occupy different OTFS subcarriers in the Doppler domain, and / or the PSS, SSS, and PBCH occupy different OTFS symbols in the delay domain.

[0040] In the above embodiment, by stipulating the resource occupation rules of PSS, SSS and PBCH, the waste of communication resources caused by unreasonable SSB signal mapping is avoided.

[0041] In conjunction with some embodiments of the first aspect, in some embodiments, determining the mapping order of the SSB signal on the DD domain scheduling unit includes any of the following:

[0042] PSS / SSS / PBCH are mapped along the delay domain; PSS / SSS / PBCH are mapped along the Doppler domain.

[0043] In the above embodiment, by stipulating that PSS / SSS / PBCH can be mapped along the delay domain or along the Doppler domain, the mapping method of the SSB signal is expanded.

[0044] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0045] The SSB signal is subjected to a first transformation, wherein the first transformation is used to transform the SSB signal from the DD domain to the time-frequency domain.

[0046] In the above embodiment, the network device performs a first transformation on the SSB signal to transform the SSB signal from the DD domain to the time-frequency domain, so that the SSB signal mapped in the DD domain can be transmitted.

[0047] In conjunction with some embodiments of the first aspect, in some embodiments, sending an SSB signal to a terminal includes:

[0048] Based on the protocol agreement, the time domain position and / or frequency domain position of the SSB signal in the time and frequency domain is determined; at the time domain position and / or frequency domain position agreed in the protocol, the SSB signal is sent to the terminal.

[0049] In the above embodiment, the network device expands the application scope of SSB signal transmission by determining the time domain position and / or frequency domain position of the SSB signal in the time-frequency domain, and sending the SSB signal to the terminal at the time domain position and / or frequency domain position agreed upon by the protocol.

[0050] In conjunction with some embodiments of the first aspect, in some embodiments, performing a first transformation on the SSB signal includes:

[0051] A first transformation is performed on the SSB signal along the time domain or the frequency domain.

[0052] In a second aspect, an embodiment of the present disclosure provides a communication method, which is executed by a terminal and includes:

[0053] The synchronous broadcast block SSB signal sent by the receiving network device is converted from the delay-Doppler (DD) domain of the orthogonal time-frequency-space (OTFS) system to the time-frequency domain of the orthogonal frequency-division multiplexing (OFDM) system.

[0054] In the above embodiment, the terminal receives the synchronization broadcast block (SSB) signal sent by the network device, where the received SSB signal is converted from the DD domain to the time-frequency domain, thereby receiving the synchronization signal block (SSB) mapped to the delay-Doppler DD domain. This method can ensure the reliability and accuracy of rapid and frequent signal switching in high-speed mobility scenarios.

[0055] In conjunction with some embodiments of the second aspect, in some embodiments, receiving a synchronization broadcast block SSB signal sent by a network device includes:

[0056] Based on the protocol agreement, the time domain position and / or frequency domain position of the SSB signal in the time and frequency domain is determined; and the SSB signal is searched for at the time domain position and / or frequency domain position.

[0057] In the above embodiment, the terminal determines the time domain position and frequency domain position of the SSB signal in the time-frequency domain and searches for the SSB signal in the time domain position and the frequency domain position, so that the terminal can quickly search for the SSB signal.

[0058] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0059] The received time-frequency domain SSB signal is subjected to a second transformation, wherein the second transformation is used to transform the SSB signal from the time-frequency domain to the DD domain.

[0060] In the above embodiment, the terminal performs a second transformation on the SSB signal, thereby transforming the SSB signal from the time-frequency domain to the DD domain.

[0061] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0062] Perform correlation detection on the PSS in the SSB signal to demodulate the PSS.

[0063] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0064] Channel estimation is performed through the PSS to obtain channel information; based on the channel information, the SSS and / or PBCH in the SSB signal are demodulated.

[0065] In the above embodiment, the terminal determines the SSS and / or PBCH in the SSB signal through the PSS, thereby mapping the synchronization signal block SSB to the delay-Doppler DD domain for sending and receiving.

[0066] In a third aspect, an embodiment of the present disclosure proposes a communication device, which includes a transceiver module for sending a synchronized broadcast block SSB signal to a terminal, wherein the SSB signal is converted from the delay-Doppler DD domain of an orthogonal time-frequency-space (OTFS) system to the time-frequency domain of an orthogonal frequency division multiplexing (OFDM) system.

[0067] In a fourth aspect, an embodiment of the present disclosure proposes a communication device, which includes a transceiver module for: receiving a synchronous broadcast block SSB signal sent by a network device, wherein the SSB signal is converted from the delay-Doppler DD domain of the orthogonal time-frequency-space OTFS system to the time-frequency domain of the orthogonal frequency division multiplexing OFDM system.

[0068] In the fifth aspect, an embodiment of the present disclosure proposes a communication device, which includes: 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, and can implement the methods described in the first aspect, the optional implementation of the first aspect, the second aspect, and the optional implementation of the second aspect.

[0069] In the sixth aspect, an embodiment of the present disclosure proposes a communication system, which includes: a terminal and a network device; wherein the network device is configured to execute the method described in the first aspect and the optional implementation of the first aspect, and the terminal is configured to execute the method described in the second aspect and the optional implementation of the second aspect.

[0070] In the seventh aspect, an embodiment of the present disclosure proposes a storage medium, which stores instructions. When the instructions are executed on a communication device, the communication device executes the method described in the first aspect, the optional implementation of the first aspect, the second aspect, and the optional implementation of the second aspect.

[0071] It is understandable that the above-mentioned communication devices, communication equipment, communication systems, storage media, program products, and computer programs are all used to execute the methods proposed in the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding methods and will not be repeated here.

[0072] The present disclosure provides communication methods, devices, equipment, storage media, and systems. In some embodiments, the terms "communication method," "information processing method," and "communication method" are interchangeable; the terms "information transmission device," "information processing device," and "communication device" are interchangeable; and the terms "information processing system," "communication system," and "communication system" are interchangeable.

[0073] In some embodiments, the network device side converts the SSB signal from the DD domain to the time-frequency domain before sending the SSB signal; the terminal side converts the SSB signal from the time-frequency domain to the DD domain after receiving the SSB signal.

[0074] In other words, during the interaction between the terminal and the network device, the terminal and the network device realize the sending and receiving of SSB signals in the time and frequency domain.

[0075] The embodiments of the present disclosure are not exhaustive and are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0076] In each embodiment of the present disclosure, unless otherwise specified or provided for by logic, the terms and / or descriptions between the embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form a new embodiment based on their inherent logical relationships.

[0077] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0078] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular, such as "a", "an", "the", "above", "said", "the", "the", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun following the article may be understood as a singular expression or a plural expression.

[0079] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0080] In some embodiments, the terms "at least one of", "at least one of", "at least one of", "one or more", "a plurality of", "multiple", etc. can be used interchangeably.

[0081] In the embodiments of the present disclosure, descriptions such as “at least one of A, B, C…”, “A and / or B and / or C…”, etc. include the situation where any one of A, B, C… exists alone, and also include any combination of any multiple of A, B, C…, and each situation can exist alone; for example, “at least one of A, B, C” includes the situation where A exists alone, B exists alone, C exists alone, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B, and C; for example, A and / or B includes the situation where A exists alone, B exists alone, and the combination of A and B.

[0082] In some embodiments, descriptions such as "in one case A, in another case B," or "in response to one case A, in response to another case B," may include the following technical solutions depending on the situation: executing A independently of B (in some embodiments, A); executing B independently of A (in some embodiments, B); selectively executing A and B (in some embodiments, selecting between A and B); and executing both A and B (in some embodiments, A and B). The same applies when there are more branches, such as A, B, and C.

[0083] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects and do not constitute any restriction on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and no unnecessary restriction should be constituted due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", then the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different; for another example, if the description object is "information", then the "first information" and the "second information" can be the same information or different information, and their contents can be the same or different.

[0084] In some embodiments, “including A,” “comprising A,” “used to indicate A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0085] In some embodiments, terms such as "in response to...", "in response to determining...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0086] In some embodiments, terms such as "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not less than", and "above" can be replaced with each other, and terms such as "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "not more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

[0087] 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.

[0088] In some embodiments, the terms "access network device (AN device)", "radio access network device (RAN device)", "base station (BS)", "radio base station" "fixed station", "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)", "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "carrier", "component carrier", "bandwidth part (BWP)" and the like may be used interchangeably.

[0089] 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.

[0090] In some embodiments, the access network device, the core network device, or the network device can be replaced by a terminal. For example, the various embodiments of the present disclosure can also be applied to a structure in which the communication between the access network device, the core network device, or the network device and the terminal is replaced by communication between multiple terminals (for example, it can also be called device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, it can also be set as a structure in which the terminal has all or part of the functions of the access network device. In addition, language such as "uplink" and "downlink" can also be replaced by language corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. can be replaced by side channels, and uplinks, downlinks, etc. can be replaced by side links.

[0091] 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.

[0092] 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", "codeword", "codebook", "codeword", "codepoint", "bit", "data", "program", and "chip" can be used interchangeably.

[0093] In some embodiments, terms such as "uplink", "uplink", "physical uplink" can be interchangeable with each other, and terms such as "downlink", "downlink", "physical downlink" can be interchangeable with each other, and terms such as "side", "sidelink", "side communication", "sidelink communication", "direct connection", "direct link", "direct communication", "direct link communication" can be interchangeable with each other.

[0094] In some embodiments, terms such as "physical downlink shared channel (PDSCH)" and "DL data" can be used interchangeably, and terms such as "physical uplink shared channel (PUSCH)" and "UL data" can be used interchangeably.

[0095] In some embodiments, terms such as "synchronization signal (SS)", "synchronization signal block (SSB)", "reference signal (RS)", "pilot", and "pilot signal" can be used interchangeably.

[0096] In some embodiments, terms such as "moment", "time point", "time", and "time position" can be replaced with each other, and terms such as "duration", "period", "time window", "window", and "time" can be replaced with each other.

[0097] In some embodiments, the terms "component carrier (CC)", "cell", "frequency carrier", "carrier frequency" and the like can be used interchangeably.

[0098] In some embodiments, terms such as "resource block (RB)", "physical resource block (PRB)", "sub-carrier group (SCG)", "resource element group (REG)", "PRB pair", "RB pair", and "resource element (RE)" can be used interchangeably.

[0099] In some embodiments, terms such as "frame", "radio frame", "subframe", "slot", "sub-slot", "mini-slot", "symbol", "symbol", and "transmission time interval (TTI)" can be used interchangeably.

[0100] In some embodiments, "obtain", "get", "obtain", "receive", "transmit", "bidirectional transmission", "send and / or receive" can be interchangeable, and can be interpreted as receiving from other entities, obtaining from a protocol, obtaining by self-processing, autonomous implementation, etc.

[0101] In some embodiments, terms such as "send", "transmit", "report", "download", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0102] In some embodiments, "predetermined" and "preset" can be interpreted as pre-specified in a protocol, etc., or can be interpreted as a pre-set action performed by a device, etc.

[0103] In some embodiments, determining may be interpreted as judging, calculating, computing, processing, deriving, investigating, searching, looking up, retrieving, ascertaining, receiving, transmitting, inputting, outputting, accessing, resolving, selecting, choosing, establishing, comparing, “assuming,” “expecting,” “considering,” broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, and the like, but is not limited thereto.

[0104] In some embodiments, 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.

[0105] Figure 1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure. As shown in Figure 1, the communication system 100 may include a network device 101 and a terminal 102. The network device 101 may include at least one of an access network device and a core network device.

[0106] In some embodiments, the terminal 102 includes, for example, a mobile phone, a wearable device, an Internet of Things device, a car with communication capabilities, a smart car, a tablet computer, a computer with wireless transceiver capabilities, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and at least one of a wireless terminal device in a smart home, but is not limited thereto.

[0107] In some embodiments, the access network device 101 is, for example, a node or device that accesses a terminal to a wireless network. The access network device 101 may include an evolved NodeB (eNB), a next generation evolved NodeB (ng-eNB), a next generation NodeB (gNB), a node B (NB), a home node B (HNB), a home evolved nodeB (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, and at least one of an access node in a wireless fidelity (WiFi) system, but is not limited thereto.

[0108] In some embodiments, the technical solution of the present disclosure can be applied to the Open RAN architecture. In this case, the interfaces between or within the access network devices involved in the embodiments of the present disclosure can be transformed into internal interfaces of Open RAN, and the processes and information interactions between these internal interfaces can be implemented through software or programs.

[0109] In some embodiments, the network device 101 may include at least one of an access network device and a core network device.

[0110] In some embodiments, the access network device can be composed of a centralized unit (CU) and a distributed unit (DU), where the CU can also be called a control unit. The CU-DU structure can be used to split the protocol layer of the access network device, with the functions of some protocol layers centrally controlled by the CU, and the functions of the remaining part or all of the protocol layers distributed in the DU, which is centrally controlled by the CU, but is not limited to this.

[0111] In some embodiments, a core network device may be a single device comprising one or more network elements, or may be a plurality of devices or a group of devices, each comprising all or part of one or more network elements. A network element may be virtual or physical. The core network may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0112] It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution proposed in the embodiment of the present disclosure. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution proposed in the embodiment of the present disclosure is also applicable to similar technical problems.

[0113] The following embodiments of the present disclosure may be applied to the communication system 100 shown in Figure 1, or a portion thereof, but are not limited thereto. The entities shown in Figure 1 are illustrative only. The communication system may include all or part of the entities shown in Figure 1, or may include other entities outside of Figure 1. The number and form of the entities may be arbitrary. The connection relationship between the entities is illustrative only. The entities may be connected or disconnected, and the connection may be in any manner, including direct or indirect, wired or wireless.

[0114] FIG2 is an interactive diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG2 , the embodiment of the present disclosure relates to a communication method for use in a communication system 100, the method comprising:

[0115] Step 2101: The network device 101 determines the SSB signal.

[0116] In some embodiments, the network device 101 may determine the SSB signal based on a protocol agreement, but is not limited thereto and may also determine the SSB signal in other ways.

[0117] In some embodiments, the SSB signal may include a primary synchronization signal PSS, a secondary synchronization signal SSS, and a physical broadcast channel PBCH, that is, the SSB signal consists of a PSS signal, an SSS signal, and a PBCH channel.

[0118] In some embodiments, the SSB signal is converted from the delay-Doppler (DD) domain of an orthogonal time-frequency-space (OTFS) system to the time-frequency domain of an orthogonal frequency-division multiplexing (OFDM) system.

[0119] In some embodiments, determining the SSB signal includes at least one of:

[0120] 1) Determine a primary synchronization signal PSS in an SSB signal and / or a first parameter corresponding to the PSS.

[0121] In some embodiments, the network device 101 determines a primary synchronization signal PSS in the SSB signal and / or a first parameter corresponding to the PSS, so as to determine a physical broadcast channel PBCH corresponding to the SSB signal based on the parameter.

[0122] In some embodiments, the first parameter may be a cell identifier. in The value can be 0, 1, or 2.

[0123] In some embodiments, the network device 101 may determine the The value of is used to determine the primary synchronization signal PSS based on the value. When the value is 0, it corresponds to PSS#1. When the value is 1, it corresponds to PSS#2. When the value is 2, it corresponds to PSS#3, and the network device 101 can determine The value of determines the PSS corresponding to the value, where The correspondence between the value of and the PSS can be pre-configured, and this disclosure does not limit this.

[0124] In some embodiments, the first parameter may be used to calculate a physical cell address (Physical Cell Identifier, PCI).

[0125] In some embodiments, the name of the first parameter is not limited, and it can be, for example, a "cell identification parameter", a "primary synchronization signal representation parameter", etc.

[0126] 2) Determine the secondary synchronization signal SSS and / or the second parameter corresponding to the SSS in the SSB signal.

[0127] In some embodiments, the network device 101 determines a second parameter corresponding to a secondary synchronization signal SSS and / or SSS in the SSB signal to determine a physical broadcast channel PBCH corresponding to the above SSB signal based on the parameter.

[0128] In some embodiments, the second parameter may be a cell identifier. in The value can be 0-335.

[0129] In some embodiments, the network device 101 may determine the The value of is used to determine the secondary synchronization signal SSS based on the value. When the value is 0, it corresponds to SSS#1. When the value is 1, it corresponds to SSS#2, and the network device 101 can determine The value of determines the SSS corresponding to the value, where The correspondence between the value of and SSS can be pre-configured, and this disclosure does not limit this.

[0130] In some embodiments, the second parameter may be used to calculate a physical cell address PCI.

[0131] In some embodiments, the name of the second parameter is not limited, and it can be, for example, a "cell identification parameter", a "secondary synchronization signal representation parameter", etc.

[0132] Optionally, in some embodiments, the secondary synchronization signal SSS may also be used as a demodulation reference signal of the physical broadcast channel PBCH to improve the demodulation performance of the physical broadcast channel.

[0133] 3) Based on the first parameter and the second parameter, determine the physical broadcast channel PBCH in the SSB signal.

[0134] In some embodiments, the network device 101 may calculate a physical cell address based on the first parameter and the second parameter, and then determine a physical broadcast channel PBCH in the SSB signal corresponding to the first parameter and the second parameter based on the determined physical cell address.

[0135] In some embodiments, the first parameter and / or the second parameter are used to calculate a physical cell address PCI.

[0136] In some embodiments, there is no limitation on the method for determining the physical broadcast channel PBCH in the SSB. For example, the PBCH in the physical broadcast channel in the SSB can be determined by determining the physical cell address PCI, where the physical cell address PCI can be determined by the following formula:

[0137] in, Indicates the physical cell address PCI, Indicates the second parameter, that is, cell ID 1, Indicates the first parameter, namely cell identifier 2.

[0138] In some embodiments, the network device 101 may determine the SSB signal by determining at least one of a primary synchronization signal PSS and / or a first parameter corresponding to the PSS, a secondary synchronization signal SSS and / or a second parameter corresponding to the SSS, and a physical broadcast channel PBCH. For example, the network device may determine the SSB signal by determining both the PSS signal and the SSS signal, or may determine the SBB signal by only determining the PSS signal, which is not limited in this disclosure.

[0139] In some embodiments, the order of determining the first parameter, the second parameter, and the third parameter is not limited. For example, the network device 101 may first determine the first parameter, then the second parameter, and finally the third parameter; or first determine the second parameter, then the first parameter, and finally the third parameter; or determine the first parameter, the second parameter, and the third parameter simultaneously.

[0140] In some embodiments, the primary synchronization signal PSS and the secondary synchronization signal SSS may be generated by any one of three sequences: a ZC sequence, an M sequence, or a gold sequence.

[0141] In some embodiments, an SSB may be an independent DD domain scheduling unit.

[0142] For example, take cell #1 Taking N21 as an example, the network device 101 detects N11 through the PSS and detects N21 through the SSS. The network device 101 can obtain the physical cell address PCI through N11 and N21. The PCI corresponds to cell #1. The network device 101 can determine the PBCH corresponding to the PCI through the obtained PCI, and further determine the SSB signal formed by the above-mentioned PSS, SSS and PBCH.

[0143] Step 2102: The network device 101 determines a third parameter.

[0144] In some embodiments, the network device 101 may determine the third parameter based on a protocol agreement, but is not limited thereto and may also determine the third parameter in other ways.

[0145] In some embodiments, the third parameter is used to identify the size of resources occupied by the SSB signal in the DD domain, wherein the third parameter includes the number of OTFS symbols occupied by the SSB signal in the delay domain and the number of OTFS subcarriers occupied in the Doppler domain.

[0146] In some embodiments, the network device 101 may determine the number of OTFS symbols occupied by the SSB signal in the delay domain by determining a third parameter.

[0147] In some embodiments, the network device 101 may determine the number of OTFS subcarriers occupied by the SSB signal in the Doppler domain by determining a third parameter.

[0148] In some embodiments, the name of the third parameter is not limited, and it can be, for example, "SSB frame", "scheduling unit", "resource occupancy identifier", etc.

[0149] In some embodiments, the network device 101 may determine the size of resources occupied by the SSB signal in the DD domain based on the size of the message to be transmitted contained in the Master Information Block (MIB) and based on protocol agreement.

[0150] In some embodiments, the number of OTFS symbols occupied by the SSB signal in the delay domain may be greater than or equal to 4, but is not limited thereto. The present disclosure does not limit the number of OTFS symbols occupied by the SSB signal in the delay domain.

[0151] In some embodiments, the number of OTFS subcarriers occupied by the SSB signal in the Doppler domain may be greater than or equal to 240, but is not limited thereto. The present disclosure does not limit the number of OTFS subcarriers occupied by the SSB signal in the Doppler domain.

[0152] For example, the network device 101 determines the third parameter based on the protocol agreement, and further determines that the number of OTFS symbols occupied by the SSB signal in the DD domain is 4, and the number of OTFS subcarriers occupied is 240.

[0153] Or, by way of example, the network device 101 determines the third parameter based on the protocol agreement, and further determines that the number of OTFS subcarriers occupied by the SSB signal in the DD domain is 4, and the number of OTFS symbols occupied is 240.

[0154] Step 2103: The network device 101 determines the mapping position and / or mapping order of the SSB signal on the DD domain scheduling unit based on the protocol agreement.

[0155] In some embodiments, the network device 101 determines the mapping position of the SSB signal on the DD domain scheduling unit based on the protocol agreement, including at least one of the following: determining the mapping position of the PSS in the DD domain; determining the mapping position of the SSS in the DD domain; determining the mapping position of the PBCH in the DD domain; determining the position of the protection symbol of any one of the PSS, SSS and PBCH, the protection symbols including delay domain protection symbols and Doppler domain protection symbols, wherein the above-mentioned protection symbols are used to reduce interference caused by channel effects and improve signal transmission quality.

[0156] In some embodiments, the PSS, SSS, and PBCH occupy different OTFS subcarriers in the Doppler domain, and / or the PSS, SSS, and PBCH occupy different OTFS symbols in the delay domain, as shown in Figures 2a and 2b, for example, where Delay represents the delay domain and Doppler represents the Doppler domain.

[0157] In other words, PSS, SSS, and PBCH cannot occupy the same OTFS subcarrier in the Doppler domain, and / or PSS, SSS, and PBCH cannot occupy the same OTFS symbol in the delay domain. This prevents the SSB formed by PSS, SSS, and PBCH from occupying too many resources in the delay domain or Doppler domain.

[0158] In some embodiments, the network device 101 determines, based on protocol agreement, that the mapping order of the SSB signal on the DD domain scheduling unit includes any one of the following: PSS / SSS / PBCH is mapped along the delay domain; PSS / SSS / PBCH is mapped along the Doppler domain.

[0159] In some embodiments, PSS / SSS / PBCH may be mapped along the delay domain, as shown in FIG2a ; PSS / SSS / PBCH may also be mapped along the Doppler domain, as shown in FIG2b .

[0160] For example, the network device 101 determines the mapping position of the PSS in the DD domain based on the protocol agreement; determines the mapping position of the SSS in the DD domain; determines the mapping position of the PBCH in the DD domain; determines the position of the protection symbol of any one of the PSS, SSS and PBCH, and the PSS / SSS / PBCH are arranged and mapped along the delay domain, wherein the PSS, SSS and PBCH occupy 4 different OTFS symbols in the delay domain, then the network device 101 can determine that the arrangement of the SSB signal in the DD domain is as shown in Figure 2a.

[0161] Step 2104: The network device 101 maps the SSB signal to the scheduling unit of the DD domain according to the mapping position and / or mapping order.

[0162] In some embodiments, the network device 101 maps the SSB signal to the scheduling unit of the DD domain according to the determined mapping position and / or mapping order.

[0163] For example, the network device 101 determines that the SSB signal is mapped according to the arrangement shown in Figure 2a, then the network device 101 can map the SSB signal to the scheduling unit of the DD domain according to the mapping position and / or mapping order shown in Figure 2a.

[0164] Step 2105: The network device 101 performs a first transformation on the SSB signal along the time domain or the frequency domain.

[0165] In some embodiments, the network device 101 may perform a first transformation on the SSB signal along the time domain or the frequency domain to convert the SSB signal from the DD domain to the time-frequency domain.

[0166] In some embodiments, the first transform is used to transform the SSB signal from the DD domain to the time-frequency domain.

[0167] In some embodiments, the first transform is an Inverse Symplectic Finite Fourier Transform (ISFFT).

[0168] In some embodiments, the network device 101 may perform an ISFFT transformation on the SSB signal according to the arrangement of the SSB signal in the DD domain, wherein the ISFFT transformation may be performed along the time domain or the frequency domain.

[0169] In some embodiments, the SSB signal can be transformed from the DD domain to the time-frequency domain by the following equation:

[0170] Where N represents the number of subcarriers in the Doppler domain of a DD domain scheduling unit; M represents the number of symbols in the delay domain of a DD domain scheduling unit; X[n,m] represents the modulation symbols in the time-frequency domain, where n represents the time domain and m represents the frequency domain; x[k,l] represents the modulation symbols in the DD domain, where k represents the Doppler domain and l represents the delay domain.

[0171] Step 2106: The network device 101 determines the time domain position and / or frequency domain position of the SSB signal in the time and frequency domain based on the protocol agreement.

[0172] In some embodiments, the network device 101 can determine the time domain position and / or frequency domain position of the SSB signal in the time-frequency domain based on the protocol agreement, so as to send the SSB signal to the terminal at the time domain position and / or frequency domain position agreed by the protocol.

[0173] For example, in some embodiments, when the carrier frequency in the SSB signal is less than 3 GHz, the network device 101 may determine, based on protocol agreement, that the time domain position of the SSB signal in the time-frequency domain is the first two time slots in the half-frame. This disclosure does not limit the method for determining the time domain position of the SSB signal in the time-frequency domain, nor the correspondence between the SSB signal and the time domain position.

[0174] For example, in some embodiments, the frequency domain position of the SSB signal in the time-frequency domain can be determined by the Global Synchronization Channel Number (GSCN), for example, a GSCN numbered 2 has a frequency domain position of 1250 kHz. The present disclosure does not limit the method for determining the frequency domain position of the SSB signal in the time-frequency domain, nor the correspondence between the SSB signal and the frequency domain position.

[0175] Step 2107: The network device 101 sends an SSB signal to the terminal 102 at the time domain position and / or frequency domain position agreed upon in the protocol.

[0176] In some embodiments, the network device 101 can send an SSB signal to the terminal 102 at a time domain position and / or frequency domain position determined by the protocol, wherein the sent SSB signal is a signal converted from the DD domain to the time-frequency domain. In other words, the network device 101 transmits the synchronization signal block SSB mapped to the DD domain in the time-frequency domain, ensuring the reliability and accuracy of the fast and frequent switching signals in high-speed mobility scenarios.

[0177] For example, based on the protocol agreement, the network device 101 determines that the time domain position of the SSB signal is the first two time slots in the half frame, and the frequency domain position is 1250kHz. Then the network device 101 sends the SSB signal to the terminal 102 in the first two time slots in the half frame and at the frequency domain position of 1250kHz.

[0178] Step 2108: Terminal 102 determines the time domain position and / or frequency domain position of the SSB signal in the time-frequency domain based on the protocol agreement.

[0179] In some embodiments, the terminal 102 can determine the time domain position and / or frequency domain position of the SSB signal in the time-frequency domain based on the protocol agreement, so as to receive the SSB signal sent by the network device 101 at the time domain position and / or frequency domain position agreed by the protocol.

[0180] For example, in some embodiments, when the carrier frequency in the SSB signal is less than 3 GHz, the terminal 102 may determine, based on protocol agreement, that the time domain position of the SSB signal in the time-frequency domain is the first two time slots in the half-frame. The present disclosure does not limit the method for determining the time domain position of the SSB signal in the time-frequency domain, nor the correspondence between the SSB signal and the time domain position.

[0181] For example, in some embodiments, the frequency domain position of the SSB signal in the time-frequency domain can be determined by the Global Synchronization Channel Number (GSCN). For example, the terminal 102 can determine the SSB signal corresponding to the GSCN numbered 2 based on the protocol agreement, and its frequency domain position is 1250 kHz. The present disclosure does not limit the method for determining the frequency domain position of the SSB signal in the time-frequency domain, nor the correspondence between the SSB signal and the frequency domain position.

[0182] Step 2109: Terminal 102 searches for SSB signals in the time domain and / or frequency domain.

[0183] In some embodiments, the terminal 102 may determine the time domain position and / or frequency domain position of the SSB signal in the time-frequency domain based on the protocol agreement, so as to search for the SSB signal at the time domain position and / or frequency domain position agreed upon by the protocol.

[0184] In some embodiments, terminal 102 receives an SSB signal transmitted by network device 101 by searching for an SSB signal. The received SSB signal is a signal converted from the DD domain to the time-frequency domain. In other words, terminal 102 receives the synchronization signal block (SSB) mapped to the DD domain in the time-frequency domain, ensuring the reliability and accuracy of fast and frequent signal switching in high-speed mobility scenarios.

[0185] For example, in some embodiments, when the carrier frequency in the SSB signal is less than 3 GHz, the terminal 102 may determine, based on protocol agreement, that the time domain position of the SSB signal in the time-frequency domain is the first two time slots in the half-frame. The present disclosure does not limit the method for determining the time domain position of the SSB signal in the time-frequency domain, nor the correspondence between the SSB signal and the time domain position.

[0186] For example, in some embodiments, the frequency domain position of the SSB signal in the time-frequency domain can be determined by the Global Synchronization Channel Number (GSCN). For example, the terminal 102 can determine the SSB signal corresponding to the GSCN numbered 2 based on the protocol agreement, and its frequency domain position is 1250 kHz. The present disclosure does not limit the method for determining the frequency domain position of the SSB signal in the time-frequency domain, nor the correspondence between the SSB signal and the frequency domain position.

[0187] For example, the terminal 102 may search for an SSB signal at a position where the time domain position is the first two time slots in a half frame and the frequency domain position is 1250 kHz based on protocol agreement.

[0188] Step 2110: Terminal 102 performs a second transformation on the SSB signal along the delay domain or the Doppler domain.

[0189] In some embodiments, the terminal 102 may perform a second transformation on the SSB signal along the delay domain or the Doppler domain to convert the SSB signal from the time-frequency domain to the DD domain.

[0190] In some embodiments, the second transform is used to transform the SSB signal from the time-frequency domain to the DD domain.

[0191] In some embodiments, the second transform is a Symplectic Finite Fourier Transform (SFFT).

[0192] In some embodiments, the terminal 102 may perform SFFT transformation on the SSB signal according to the arrangement of the SSB signal in the DD domain, wherein the SFFT transformation may be performed along the time domain or the frequency domain.

[0193] In some embodiments, the SSB signal can be transformed from the time-frequency domain to the DD domain by the following equation:

[0194] Among them, N represents the number of symbols in the time domain of a time-frequency domain scheduling unit; M represents the number of subcarriers in the frequency domain of a time-frequency domain scheduling unit; X[n,m] represents the modulation symbol in the time-frequency domain, n represents the time domain, and m represents the frequency domain; x[k,l] represents the modulation symbol in the DD domain, k represents the Doppler domain, and l represents the delay domain.

[0195] Step 2111: Terminal 102 performs correlation detection on the PSS in the SSB signal to demodulate the PSS.

[0196] In some embodiments, the terminal 102 can perform blind detection on the SSB signal, that is, use multiple PSSs stored in the terminal to perform correlation detection with the PSS in the received SSB signal to demodulate the PSS in the SSB signal. It should be understood that the terminal 102 can also demodulate the PSS through other detection methods, and the present disclosure is not limited to this.

[0197] For example, if the correlation between the PSS#1 stored in the terminal and the PSS in the SSB signal meets the set requirements, the terminal 102 can determine that the PSS in the SSB signal is PSS#1, thereby demodulating the PSS in the SSB signal.

[0198] In some embodiments, the terminal 102 may demodulate the PSS based on the mapping position and / or mapping order of the SSB signal on the DD domain scheduling unit.

[0199] For example, if an SSB signal occupies four OTFS symbols on a DD-domain scheduling unit, the terminal 102 may perform PSS demodulation in units of one OTFS symbol. In other words, if an SSB signal occupies four subcarriers on a DD-domain scheduling unit, the terminal 102 may perform PSS demodulation in units of one subcarrier.

[0200] Step 2112: Terminal 102 performs channel estimation through PSS to obtain channel information.

[0201] In some embodiments of the present disclosure, the terminal 102 can calculate the channel coefficient based on the demodulated PSS and the theoretically received PSS to perform channel estimation and obtain the channel coefficient, but is not limited to this. The present disclosure does not limit the method of performing channel estimation.

[0202] Step 2113: Terminal 102 demodulates the SSS and / or PBCH in the SSB signal based on the channel information.

[0203] In some embodiments, the terminal 102 demodulates the SSS and / or PBCH in the SSB signal based on the channel information to achieve demodulation of the DD domain modulation symbols.

[0204] In some embodiments, the terminal 102 can use the obtained channel information to perform circular convolution on the data in the DD domain, thereby removing the impact of the channel on the DD data and demodulating the SSS and / or PBCH in the SSB signal, but is not limited to this. The present disclosure does not limit the method of demodulating the SSS and / or PBCH in the SSB signal.

[0205] The above steps 2101-2106 may be optional steps, and steps 2108-2113 may be optional steps. That is, one step or multiple steps may be performed, and one or more of these steps may be omitted or replaced in different embodiments.

[0206] The communication control method according to the embodiments of the present disclosure may include at least one of steps 2101 to 2113. For example, step 2101 may be implemented as an independent embodiment, step 2107 may be implemented as an independent embodiment, steps 2101+2102+2104 may be implemented as an independent embodiment, steps 2101+2102+2103+2104 may be implemented as an independent embodiment, and steps 2107+2108+2109+2110 may be implemented as an independent embodiment, but the present invention is not limited thereto.

[0207] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, the optional methods or optional examples can be arbitrarily combined, and can be arbitrarily combined with any steps of other embodiments or other examples.

[0208] FIG3a is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG3a, the embodiment of the present disclosure relates to a communication method for a network device 102, the method comprising:

[0209] Step 3101: Determine the SSB signal.

[0210] The optional implementation of step 3101 can refer to the optional implementation of step 2101 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0211] In some embodiments, the network device 101 may determine the SSB signal based on a protocol agreement, but is not limited thereto and may also determine the SSB signal in other ways.

[0212] In some embodiments, the SSB signal is converted from the delay-Doppler (DD) domain of an orthogonal time-frequency-space (OTFS) system to the time-frequency domain of an orthogonal frequency-division multiplexing (OFDM) system.

[0213] In some embodiments, step 3101 is omitted and the above functions are default or by default.

[0214] Step 3102: Determine the third parameter.

[0215] The optional implementation of step 3102 can refer to the optional implementation of step 2102 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0216] In some embodiments, the network device 101 may determine the third parameter based on a protocol agreement, but is not limited thereto and may also determine the third parameter in other ways.

[0217] In some embodiments, the third parameter is used to identify the size of resources occupied by the SSB signal in the DD domain, wherein the third parameter includes the number of OTFS symbols occupied by the SSB signal in the delay domain and the number of OTFS subcarriers occupied in the Doppler domain.

[0218] In some embodiments, step 3102 is omitted and the above functions are default or by default.

[0219] Step 3103: Determine the mapping position and / or mapping order of the SSB signal on the DD domain scheduling unit.

[0220] The optional implementation of step 3103 can refer to the optional implementation of step 2103 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0221] In some embodiments, the network device 101 can determine the mapping position and / or mapping order of the SSB signal on the DD domain scheduling unit based on protocol agreement, but is not limited to this, and the mapping position and / or mapping order of the SSB signal on the DD domain scheduling unit can also be determined by other means.

[0222] In some embodiments, step 3103 is omitted and the above functions are default or by default.

[0223] Step 3104: Map the SSB signal to the scheduling unit of the DD domain.

[0224] The optional implementation of step 3104 can refer to the optional implementation of step 2104 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0225] In some embodiments, the network device 101 may map the SSB signal to the scheduling unit of the DD domain according to the mapping position and / or mapping order, but is not limited thereto and may also map the SSB signal to the scheduling unit of the DD domain in other ways.

[0226] In some embodiments, step 3104 is omitted and the above functions are default or by default.

[0227] Step 3105: Perform a first transformation on the SSB signal.

[0228] The optional implementation of step 3105 can refer to the optional implementation of step 2105 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0229] In some embodiments, the network device 101 may perform a first transformation on the SSB signal along the time domain or the frequency domain, but is not limited thereto and may also perform a first transformation on the SSB signal in other ways.

[0230] In some embodiments, step 3105 is omitted and the above functions are default or by default.

[0231] Step 3106: Determine the time domain position and / or frequency domain position of the SSB signal in the time-frequency domain.

[0232] The optional implementation of step 3106 can refer to the optional implementation of step 2106 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0233] In some embodiments, the network device 101 can determine the time domain position and / or frequency domain position of the SSB signal in the time and frequency domain based on protocol agreement, but is not limited to this, and the time domain position and / or frequency domain position of the SSB signal in the time and frequency domain can also be determined by other means.

[0234] In some embodiments, step 3106 is omitted and the above functions are default or by default.

[0235] Step 3107: Send SSB signal.

[0236] The optional implementation of step 3107 can refer to the optional implementation of step 2107 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0237] In some embodiments, the network device 101 may send an SSB signal at a time domain position and / or frequency domain position agreed upon in the protocol, but is not limited thereto and may also send an SSB signal at other positions.

[0238] In some embodiments, the network device 101 may send an SSB signal to the terminal 102 , but is not limited to, and may also send an SSB signal to other entities.

[0239] In some embodiments, the terminal 102 can receive the SSB signal sent by the network device 101 at the time domain position and / or frequency domain position agreed upon by the protocol.

[0240] In some embodiments, step 3107 is omitted and the above functions are default or by default.

[0241] The communication method according to the embodiments of the present disclosure may include at least one of steps 3101 to 3107. For example, step 3101 may be implemented as an independent embodiment, step 3107 may be implemented as an independent embodiment, steps 3101+3102+3103+3104 may be implemented as an independent embodiment, and steps 3104+3105+3106 may be implemented as an independent embodiment, but the present invention is not limited thereto.

[0242] In some embodiments, steps 3101 and 3102 may be performed in an interchanged order or simultaneously.

[0243] In some embodiments, step 3101, step 3102, step 3103, step 3104, step 3105, and step 3106 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0244] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, the optional methods or optional examples can be arbitrarily combined, and can be arbitrarily combined with any steps of other embodiments or other examples.

[0245] FIG3b is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG3b, the present disclosure embodiment relates to a communication method for a network device 101, the method comprising:

[0246] Step 3201: Determine the SSB signal.

[0247] Optional implementations of step 3201 can be found in step 2101 of FIG. 2 , optional implementations of step 3101 of FIG. 3 a , and other related parts in the embodiments involved in FIG. 2 and FIG. 3 a , which will not be described in detail here.

[0248] In some embodiments, the network device 101 may determine the SSB signal based on a protocol agreement, but is not limited thereto and may also determine the SSB signal in other ways.

[0249] In some embodiments, the SSB signal is converted from the delay-Doppler (DD) domain of an orthogonal time-frequency-space (OTFS) system to the time-frequency domain of an orthogonal frequency-division multiplexing (OFDM) system.

[0250] In some embodiments, step 3201 is omitted and the above functions are default or by default.

[0251] Step 3202: Map the SSB signal to the scheduling unit of the DD domain.

[0252] Optional implementations of step 3202 can be found in step 2104 of FIG. 2 , optional implementations of step 3104 of FIG. 3 a , and other related parts in the embodiments involved in FIG. 2 and FIG. 3 a , which will not be described in detail here.

[0253] In some embodiments, the network device 101 may map the SSB signal to the scheduling unit of the DD domain according to the mapping position and / or mapping order, but is not limited thereto and may also map the SSB signal to the scheduling unit of the DD domain in other ways.

[0254] In some embodiments, step 3202 is omitted and the above functions are default or by default.

[0255] Step 3203: Perform a first transformation on the SSB signal.

[0256] Optional implementations of step 3203 can be found in step 2105 of FIG. 2 , optional implementations of step 3105 of FIG. 3 a , and other related parts in the embodiments involved in FIG. 2 and FIG. 3 a , which will not be described in detail here.

[0257] In some embodiments, the network device 101 may perform a first transformation on the SSB signal along the time domain or the frequency domain, but is not limited thereto and may also perform a first transformation on the SSB signal in other ways.

[0258] In some embodiments, step 3203 is omitted and the above functions are default or by default.

[0259] Step 3204: Send SSB signal.

[0260] Optional implementations of step 3204 can be found in step 2107 of FIG. 2 , optional implementations of step 3107 of FIG. 3 a , and other related parts in the embodiments involved in FIG. 2 and FIG. 3 a , which will not be described in detail here.

[0261] In some embodiments, the network device 101 may send an SSB signal at a time domain position and / or frequency domain position agreed upon in the protocol, but is not limited thereto and may also send an SSB signal at other positions.

[0262] In some embodiments, the network device 101 may send an SSB signal to the terminal 102 , but is not limited to, and may also send an SSB signal to other entities.

[0263] In some embodiments, the terminal 102 can receive the SSB signal sent by the network device 101 at the time domain position and / or frequency domain position agreed upon by the protocol.

[0264] In some embodiments, step 3204 is omitted and the above functions are default or by default.

[0265] For a detailed description of steps 3201 - 3204 , please refer to the embodiment shown in FIG. 2 .

[0266] The communication method involved in the embodiments of the present disclosure may include at least one of steps 3201 to 3204. For example, step 3201 can be implemented as an independent embodiment, and step 3204 can be implemented as an independent embodiment, but are not limited thereto. Steps 3201 and 3202 can be implemented as independent embodiments, and steps 3203 and 3204 can be implemented as independent embodiments, but are not limited thereto.

[0267] In some embodiments, step 3201, step 3202, and step 3203 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0268] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, and the optional methods or optional examples can be arbitrarily combined and can be arbitrarily combined with other embodiments or examples.

[0269] FIG3c is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG3c, the embodiment of the present disclosure relates to a communication method for a network device 101, the method comprising:

[0270] Step 3301: Send a synchronous broadcast block SSB signal to the terminal.

[0271] The optional implementation of step 3301 can refer to the optional implementation of step 2107 in Figure 2, step 3107 in Figure 3a, step 3204 in Figure 3b, and other related parts in the embodiments involved in Figures 2, 3a, and 3b, which will not be repeated here.

[0272] In some embodiments, the network device 101 sends a synchronized broadcast block SSB signal to the terminal, wherein the SSB signal is converted from the delay-Doppler (DD) domain of the orthogonal time-frequency-space (OTFS) system to the time-frequency domain of the orthogonal frequency division multiplexing (OFDM) system.

[0273] In some embodiments, the method further includes: the network device 101 determining the SSB signal based on the protocol agreement.

[0274] In some embodiments, the network device 101 determines the SSB signal including at least one of the following: the network device 101 determines the first parameter corresponding to the primary synchronization signal PSS and / or PSS in the SSB signal; the network device 101 determines the second parameter corresponding to the secondary synchronization signal SSS and / or SSS in the SSB signal; the network device 101 determines the physical broadcast channel PBCH in the SSB signal based on the first parameter and the second parameter; wherein the first parameter and / or the second parameter are used to calculate the physical cell address PCI.

[0275] In some embodiments, the method also includes: the network device 101 determines a third parameter based on a protocol agreement, wherein the third parameter is used to identify the size of resources occupied by the SSB signal in the DD domain, and the third parameter includes the number of OTFS symbols occupied by the SSB signal in the delay domain and the number of OTFS subcarriers occupied in the Doppler domain.

[0276] In some embodiments, the method also includes: the network device 101 determines the mapping position and / or mapping order of the SSB signal on the DD domain scheduling unit based on the protocol agreement; and maps the SSB signal to the scheduling unit of the DD domain according to the mapping position and / or mapping order.

[0277] In some embodiments, the network device 101 determines the mapping position of the SSB signal on the DD domain scheduling unit, including at least one of the following: the network device 101 determines the mapping position of the PSS in the DD domain; the network device 101 determines the mapping position of the SSS in the DD domain; the network device 101 determines the mapping position of the PBCH in the DD domain; the network device 101 determines the position of the protection symbol of any one of the PSS, SSS and PBCH, and the protection symbol includes a delay domain protection symbol and a Doppler domain protection symbol.

[0278] In some embodiments, the PSS, SSS, and PBCH occupy different OTFS subcarriers in the Doppler domain, and / or the PSS, SSS, and PBCH occupy different OTFS symbols in the delay domain.

[0279] In some embodiments, the network device 101 determines the mapping order of the SSB signal on the DD domain scheduling unit, including any of the following: the network device 101 determines that the PSS / SSS / PBCH is mapped along the delay domain; the network device 101 determines that the PSS / SSS / PBCH is mapped along the Doppler domain.

[0280] In some embodiments, the method further includes: the network device 101 performs a first transformation on the SSB signal, wherein the first transformation is used to transform the SSB signal from the DD domain to the time-frequency domain.

[0281] In some embodiments, the network device 101 sends an SSB signal to the terminal, including: the network device 101 determines the time domain position and / or frequency domain position of the SSB signal in the time and frequency domain based on the protocol agreement; the network device 101 sends the SSB signal to the terminal at the time domain position and / or frequency domain position agreed upon by the protocol.

[0282] In some embodiments, the network device 101 performs a first transformation on the SSB signal, including: the network device 101 performs a first transformation on the SSB signal along the time domain or the frequency domain.

[0283] For a detailed description of step 3301 , please refer to the embodiment shown in FIG. 2 .

[0284] FIG4a is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG4a, the embodiment of the present disclosure relates to a communication method for terminal 102, the method comprising:

[0285] Step 4101: Determine the time domain position and / or frequency domain position of the SSB signal in the time-frequency domain.

[0286] The optional implementation of step 4101 can refer to the optional implementation of step 2108 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0287] In some embodiments, the terminal 102 may determine the time domain position and frequency domain position of the SSB signal in the time and frequency domain based on the protocol agreement, but is not limited thereto, and may also determine the time domain position and frequency domain position of the SSB signal in the time and frequency domain by other means.

[0288] In some embodiments, step 4101 is omitted and the above functions are default or by default.

[0289] Step 4102: Search for SSB signal.

[0290] The optional implementation of step 4102 can refer to the optional implementation of step 2107 and step 2109 in Figure 2, and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0291] In some embodiments, the terminal 102 may search for SSB signals at time domain positions and frequency domain positions, but is not limited thereto and may also search for SSB signals at other positions.

[0292] In some embodiments, step 4102 is omitted and the above functions are default or by default.

[0293] Step 4103: Perform a second transformation on the SSB signal.

[0294] The optional implementation of step 4103 can refer to the optional implementation of step 2110 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0295] In some embodiments, the terminal 102 may perform a second transformation on the SSB signal along the delay domain or the Doppler domain, but is not limited thereto and may also perform a second transformation on the SSB signal in other ways.

[0296] In some embodiments, the second transform is used to transform the SSB signal from the time-frequency domain to the DD domain.

[0297] In some embodiments, step 4103 is omitted and the above functions are default or by default.

[0298] Step 4104: perform correlation detection on the PSS in the SSB signal.

[0299] The optional implementation of step 4104 can refer to the optional implementation of step 2111 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0300] In some embodiments, the terminal 102 may perform correlation detection on the PSS in the SSB signal to demodulate the PSS.

[0301] In some embodiments, step 4104 is omitted and the above functions are default or by default.

[0302] Step 4105: Perform channel estimation.

[0303] The optional implementation of step 4105 can refer to the optional implementation of step 2112 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0304] In some embodiments, the terminal 102 may perform channel estimation through the PSS to obtain channel information, but is not limited thereto and may also perform channel estimation through other methods.

[0305] In some embodiments, step 4105 is omitted and the above functions are default or by default.

[0306] Step 4106: Demodulate the SSS and / or PBCH in the SSB signal.

[0307] The optional implementation of step 4106 can refer to the optional implementation of step 2113 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0308] In some embodiments, the terminal 102 may demodulate the SSS and / or PBCH in the SSB signal based on the channel information, but is not limited thereto, and may also demodulate the SSS and / or PBCH in the SSB signal through other information.

[0309] In some embodiments, step 4106 is omitted and the above functions are default or by default.

[0310] The communication method involved in the embodiments of the present disclosure may include at least one of steps 4101 to 4106. For example, step 4101 may be implemented as an independent embodiment, step 4106 may be implemented as an independent embodiment, for example, steps 4101+4102 may be implemented as an independent embodiment, and steps 4102+4103 may be implemented as an independent embodiment, but the present invention is not limited thereto.

[0311] In some embodiments, step 4103, step 4104, step 4105, step 4106, and step 4107 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0312] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, and the optional methods or optional examples can be arbitrarily combined and can be arbitrarily combined with other embodiments or examples.

[0313] FIG4 b is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG4 b , the present disclosure embodiment relates to a communication method for terminal 102, the method comprising:

[0314] Step 4201: Receive SSB signal.

[0315] The optional implementation of step 4201 can be found in steps 2107, 2108, and 2109 of FIG. 2 , step 4101 of FIG. 4 a , the optional implementation of step 4102, and other related parts in the embodiments involved in FIG. 2 and FIG. 4 a , which will not be repeated here.

[0316] In some embodiments, the terminal 102 can receive the SSB signal sent by the network device 101, but is not limited to this, and can also receive the SSB signal sent by other entities.

[0317] In some embodiments, the SSB signal is converted from the delay-Doppler (DD) domain of an orthogonal time-frequency-space (OTFS) system to the time-frequency domain of an orthogonal frequency-division multiplexing (OFDM) system.

[0318] In some embodiments, step 4201 is omitted and the above functions are default or by default.

[0319] Step 4202: Perform a second transformation on the SSB signal.

[0320] The optional implementation of step 4202 can refer to step 2110 of Figure 2, the optional implementation of step 4103 of Figure 4a, and other related parts in the embodiments involved in Figures 2 and 4a, which will not be repeated here.

[0321] In some embodiments, the terminal 102 may perform a second transformation on the SSB signal along the delay domain or the Doppler domain, but is not limited thereto and may also perform a second transformation on the SSB signal in other ways.

[0322] In some embodiments, the second transform is used to transform the SSB signal from the time-frequency domain to the DD domain.

[0323] In some embodiments, step 4202 is omitted and the above functions are default or by default.

[0324] Step 4203: Perform correlation detection on the PSS in the SSB signal.

[0325] The optional implementation of step 4203 can refer to the optional implementation of step 2111 in Figure 2, the optional implementation of step 4104 in Figure 4a, and other related parts in the embodiments involved in Figures 2 and 4a, which will not be repeated here.

[0326] In some embodiments, the terminal 102 may perform correlation detection on the PSS in the SSB signal to demodulate the PSS.

[0327] In some embodiments, step 4203 is omitted and the above functions are default or by default.

[0328] Step 4204: Demodulate the SSS and / or PBCH in the SSB signal.

[0329] The optional implementation of step 4204 can refer to the optional implementation of step 2113 in Figure 2, the optional implementation of step 4106 in Figure 4a, and other related parts in the embodiments involved in Figures 2 and 4a, which will not be repeated here.

[0330] In some embodiments, the terminal 102 may demodulate the SSS and / or PBCH in the SSB signal based on the channel information, but is not limited thereto, and may also demodulate the SSS and / or PBCH in the SSB signal through other information.

[0331] In some embodiments, step 4106 is omitted and the above functions are default or by default.

[0332] For a detailed description of steps 4201-4204, please refer to the embodiment of FIG2 above.

[0333] The communication method involved in the embodiments of the present disclosure may include at least one of steps 4201 to 4204. For example, step 4201 may be implemented as an independent embodiment, step 4202 may be implemented as an independent embodiment, for example, steps 4101+4102 may be implemented as an independent embodiment, and steps 4103+4104 may be implemented as an independent embodiment, but the present invention is not limited thereto.

[0334] In some embodiments, step 4202, step 4203, and step 4204 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0335] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, and the optional methods or optional examples can be arbitrarily combined and can be arbitrarily combined with other embodiments or examples.

[0336] FIG4c is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG4c, the embodiment of the present disclosure relates to a communication method for terminal 102, the method comprising:

[0337] Step 4301: Receive the synchronous broadcast block SSB signal sent by the network device.

[0338] The optional implementation of step 4301 can be found in steps 2107, 2108, and 2109 of Figure 2, step 4101 and 4102 of Figure 4a, and the optional implementation of step 4201 of Figure 4b, as well as other related parts in the embodiments involved in Figures 2, 4a, and 4b, which will not be repeated here.

[0339] In some embodiments, the terminal 102 receives a synchronized broadcast block SSB signal sent by a network device, wherein the SSB signal is converted from the delay-Doppler (DD) domain of an orthogonal time-frequency-space (OTFS) system to the time-frequency domain of an orthogonal frequency division multiplexing (OFDM) system.

[0340] In some embodiments, the terminal 102 receives the synchronous broadcast block SSB signal sent by the network device, including: the terminal 102 determines the time domain position and frequency domain position of the SSB signal in the time and frequency domain based on the protocol agreement; the terminal 102 searches for the SSB signal in the time domain position and frequency domain position.

[0341] In some embodiments, the method further includes: the terminal 102 performs a second transformation on the SSB signal, wherein the second transformation is used to transform the SSB signal from the time-frequency domain to the DD domain.

[0342] In some embodiments, the terminal 102 performing a second transformation on the SSB signal includes: the terminal 102 performing a second transformation on the SSB signal along the delay domain or the Doppler domain.

[0343] In some embodiments, the method further includes: the terminal 102 performs correlation detection on the PSS in the SSB signal to demodulate the PSS.

[0344] In some embodiments, the method further includes: the terminal 102 performs channel estimation through the PSS to obtain channel information; and the terminal 102 demodulates the SSS and / or PBCH in the SSB signal based on the channel information.

[0345] For a detailed description of step 4301 , please refer to the embodiment shown in FIG. 2 .

[0346] FIG5 is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG5 , the embodiment of the present disclosure relates to a communication method for a communication system, the method comprising:

[0347] Step 5101: The network device 101 sends a synchronous broadcast block SSB signal to the terminal 102.

[0348] For the optional implementation of step 5101, please refer to step 2101 of Figure 2, step 3101 of Figure 3a, step 3201 of Figure 3b, step 3301 of Figure 3c, step 4101 of Figure 4a, step 4201 of Figure 4b, and step 4301 of Figure 4c, as well as other related parts in the embodiments involved in Figures 2, 3a, 3b, 3c, 4a, 4b, and 4c, which will not be repeated here.

[0349] In some embodiments, the above method may include the method described in the above embodiments of the communication system side, terminal side, network device side, etc., which will not be repeated here.

[0350] In some embodiments, the communication system includes a network device and a terminal.

[0351] The following is an exemplary introduction to the above method.

[0352] In some optional embodiments, the method may include at least one of the following steps:

[0353] In step 1, the network device determines a PSS / SSS sequence and related parameters. The sequence is any one of a ZC sequence, an M sequence, or a gold sequence. The parameters include any one of the first parameter, the second parameter, and the third parameter.

[0354] Step 2: The network device determines the PBCH information corresponding to the above PSS / SSS. PSS / SSS and its corresponding PBCH are collectively referred to as SSB.

[0355] Step 3: The network device determines the DD domain parameters of the OTFS that carries the SSB, including:

[0356] 1) Based on the agreement, the network equipment determines the number of OTFS symbols occupied by SSB in the delay domain.

[0357] 2) Based on the agreement, the network equipment determines the number of OTFS subcarriers occupied by SSB in the Doppler domain.

[0358] 3) The network device determines the mapping method of SSB on the OTFS DD domain as follows:

[0359] Determination method 1) Based on the agreement, the network device determines the mapping position of the PSS in the DD domain and the position of its protection symbols, including the delay domain protection symbols and the Doppler domain protection symbols.

[0360] Determination method 2) Based on the agreement, the network device determines the mapping position of the SSS in the DD domain and the position of its protection symbols, including the delay domain protection symbols and the Doppler domain protection symbols.

[0361] Determination method 3) Based on the agreement, the network device determines the mapping position and / or protection symbol position of the PBCH in the DD domain, including the delay domain protection symbol and the Doppler domain protection symbol.

[0362] The arrangement of SSB in the DD domain satisfies the following characteristics:

[0363] Feature 1) The PSS, SSS, and PBCH occupy different OTFS subcarriers in the Doppler domain.

[0364] Feature 2) The PSS, SSS, and PBCH occupy different OTFS symbols in the delay domain.

[0365] Among them, the possible arrangement of SSB in the DD domain is shown in Figure 2a and Figure 2b

[0366] In step 4, the network device determines the mapping order of the SSB information in the DD domain, which may be mapped according to the delay domain or the Doppler domain.

[0367] In step 5, the network device performs ISFFT transformation on the SSB signal and maps it to the time-frequency domain, and the time domain and frequency domain positions of the mapping are agreed upon by the protocol.

[0368] Step 6: The network device sends the SSB signal according to the agreement.

[0369] In step 7, the terminal searches for the SSB signal at the corresponding time-frequency domain position according to the agreement.

[0370] In step 8, after receiving the SSB signal, the terminal first performs SFFT transformation on the SSB signal according to the arrangement mode of the SSB signal in the DD domain, wherein the SFFT transformation can be performed along the delay domain or along the Doppler domain.

[0371] Step 9: The terminal performs correlation detection on the PSS signal and demodulates the PSS signal.

[0372] Step 10: The terminal estimates the transmission channel through the PSS signal and demodulates the PBCH and SSS signals based on the channel information estimated by the PSS.

[0373] The embodiments of the present disclosure further provide an apparatus for implementing any of the above methods. For example, an apparatus is provided that includes units or modules for implementing each step performed by a network device in any of the above methods. For another example, another apparatus is provided that includes units or modules for implementing each step performed by a terminal in any of the above methods.

[0374] It should be understood that the division of the various units or modules in the above device is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a physical entity, or they may be physically separated. In addition, the units or modules in the device may be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and the memory stores instructions. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the various units or modules of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory within the device or a memory outside the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units or modules can be realized by designing the hardware circuits. The above-mentioned hardware circuits can be understood as one or more processors; for example, in one implementation, the above-mentioned hardware circuit is an application-specific integrated circuit (ASIC), which realizes the functions of some or all of the above units or modules by designing the logical relationship of the components in the circuit; for example, in another implementation, the above-mentioned hardware circuit can be realized by a programmable logic device (PLD). Taking a field programmable gate array (FPGA) as an example, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by configuring the configuration file, thereby realizing the functions of some or all of the above units or modules. All units or modules of the above devices can be realized in the form of software called by the processor, or in the form of hardware circuits, or in part by the form of software called by the processor, and the rest by hardware circuits.

[0375] In the embodiment of the present disclosure, the processor is a circuit with signal processing capability. In one implementation, the processor can be a circuit with instruction reading and execution capability, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP); in another implementation, the processor can implement certain functions through the logical relationship of the hardware circuit, and the logical relationship of the above hardware circuit is fixed or reconfigurable, such as a hardware circuit implemented by a processor as an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and implementing the hardware circuit configuration can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0376] Figure 6a is a structural diagram of a communication device 6100 proposed in an embodiment of the present disclosure. As shown in Figure 6a, the communication device 6100 includes: a transceiver module 6101. In some embodiments, the transceiver module sends a synchronous broadcast block SSB signal to the terminal, wherein the SSB signal is converted from the delay-Doppler DD domain of the orthogonal time-frequency space (OTFS) system to the time-frequency domain of the orthogonal frequency division multiplexing (OFDM) system. Optionally, the transceiver module is used to perform at least one of the communication steps such as sending and / or receiving (for example, step 2107, but not limited thereto) performed by the network device 101 in any of the above methods, which are not repeated here. Optionally, in some embodiments, the communication device 6100 further includes: a processing module 6102, which is used to perform other steps (for example, step 2101, step 2102, step 2103, step 2104, step 2105, step 2106, but not limited thereto) performed by the network device 101 in any of the above methods and are not repeated here.

[0377] Figure 6b is a structural diagram of a communication device 6200 proposed in an embodiment of the present disclosure. As shown in Figure 6b, the communication device 6200 includes: a transceiver module 6201. In some embodiments, the transceiver module is used to receive a synchronous broadcast block SSB signal sent by a network device, wherein the SSB signal is converted from the delay-Doppler DD domain of the orthogonal time-frequency space (OTFS) system to the time-frequency domain of the orthogonal frequency division multiplexing (OFDM) system. Optionally, the transceiver module is used to perform at least one of the communication steps such as sending and / or receiving (for example, step 2107, but not limited to this) performed by the terminal 102 in any of the above methods, which are not repeated here. Optionally, in some embodiments, the communication device 6200 further includes: a processing module 6202, which is used to perform other steps (for example, step 2108, step 2109, step 2110, step 2111, step 2112, step 2113, but not limited to this) performed by the terminal 102 in any of the above methods and are not repeated here.

[0378] Figure 7a is a schematic diagram of the structure of a communication device 7100 proposed in an embodiment of the present disclosure. Communication device 7100 can be a network device (e.g., an access network device, a core network device, etc.), a terminal (e.g., a user equipment, etc.), a chip, a chip system, or a processor that supports a network device to implement any of the above methods, or a chip, a chip system, or a processor that supports a terminal to implement any of the above methods. Communication device 7100 can be used to implement the methods described in the above method embodiments. For details, please refer to the description of the above method embodiments.

[0379] As shown in Figure 7a, the communication device 7100 includes one or more processors 7101. The processor 7101 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control the communication device (such as a base station, baseband chip, terminal device, terminal device chip, DU or CU, etc.), execute programs, and process program data. The processor 7101 is used to call instructions to enable the communication device 7100 to perform any of the above methods.

[0380] In some embodiments, the communication device 7100 further includes one or more memories 7102 for storing instructions. Optionally, all or part of the memories 7102 may be located outside the communication device 7100.

[0381] In some embodiments, the communication device 7100 further includes one or more transceivers 7103. When the communication device 7100 includes one or more transceivers 7103, the communication steps such as sending and receiving in the above method are performed by the transceiver 7103, and the other steps are performed by the processor 7101.

[0382] In some embodiments, a transceiver may include a receiver and a transmitter, which may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, and transceiver circuit may be used interchangeably; the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be used interchangeably; and the terms receiver, receiving unit, receiver, and receiving circuit may be used interchangeably.

[0383] Optionally, the communication device 7100 further includes one or more interface circuits 7104, which are connected to the memory 7102. The interface circuits 7104 may be configured to receive signals from the memory 7102 or other devices, and may be configured to send signals to the memory 7102 or other devices. For example, the interface circuits 7104 may read instructions stored in the memory 7102 and send the instructions to the processor 7101.

[0384] The communication device 7100 described in the above embodiment may be a network device or a terminal, but the scope of the communication device 7100 described in the present disclosure is not limited thereto, and the structure of the communication device 7100 may not be limited by FIG. 7a. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data or programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0385] FIG7 b is a schematic diagram of the structure of a chip 7200 according to an embodiment of the present disclosure. If the communication device 7100 can be a chip or a chip system, reference can be made to the schematic diagram of the structure of the chip 7200 shown in FIG7 b , but the present disclosure is not limited thereto.

[0386] The chip 7200 includes one or more processors 7201 , and the processor 7201 is used to call instructions so that the chip 7200 executes any of the above methods.

[0387] In some embodiments, chip 7200 further includes one or more interface circuits 7202, which are connected to memory 7203. Interface circuit 7202 can be used to receive signals from memory 7203 or other devices, and can be used to send signals to memory 7203 or other devices. For example, interface circuit 7202 can read instructions stored in memory 7203 and send the instructions to processor 7201. Optionally, the terms interface circuit, interface, transceiver pin, and transceiver are interchangeable.

[0388] In some embodiments, the chip 7200 further includes one or more memories 7203 for storing instructions. Alternatively, all or part of the memories 7203 may be located outside the chip 7200.

[0389] The present disclosure also proposes a storage medium having instructions stored thereon. When the instructions are executed on the communication device 7100, the communication device 7100 executes any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited thereto and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto and may also be a temporary storage medium.

[0390] The present disclosure also provides a program product, which, when executed by the communication device 7100, enables the communication device 7100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0391] The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to perform any one of the above methods.

[0392] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented using software, all or part of the embodiments can be implemented 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, all or part of the processes or functions described in the embodiments of the present disclosure are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a high-density digital video disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0393] The correspondences shown in the tables of the present disclosure 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 the present disclosure. When configuring the correspondences between information and parameters, it is not necessarily required to configure all the correspondences shown in each table. For example, in the tables of the present disclosure, the correspondences shown in certain rows may not be configured. For another example, appropriate deformation 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 may also adopt other names that can be understood by the communication device, and the values ​​or representations of the parameters may also adopt other values ​​or representations that can be understood by the communication device. When implementing the above tables, other data structures may also be used, such as arrays, queues, containers, stacks, linear lists, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables or hash tables, etc.

[0394] The predefined in the present disclosure may be understood as defined, predefined, stored, pre-stored, pre-negotiated, pre-configured, solidified, or pre-burned.

[0395] 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. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this disclosure.

[0396] 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.

[0397] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure 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 disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A communication method, characterized in that: The method is performed by a network device, and the method includes: Send a synchronous broadcast block SSB signal to the terminal, The SSB signal is converted from the delay-Doppler (DD) domain of the orthogonal time-frequency-space (OTFS) system to the time-frequency domain of the orthogonal frequency-division multiplexing (OFDM) system.

2. The method according to claim 1, characterized in that: The method further comprises: Determine the SSB signal, wherein the determining the SSB signal comprises at least one of the following: Determine a primary synchronization signal PSS in the SSB signal and / or a first parameter corresponding to the PSS; Determine a second parameter corresponding to a secondary synchronization signal SSS in the SSB signal and / or the SSS; Determine a physical broadcast channel PBCH in the SSB signal based on the first parameter and the second parameter; The first parameter and / or the second parameter is used to calculate the physical cell address PCI.

3. The method according to claims 1 and 2, characterized in that The method further comprises: Determine the third parameter, Among them, the third parameter is used to identify the size of resources occupied by the SSB signal in the DD domain, and the third parameter includes the number of OTFS symbols occupied by the SSB signal in the delay domain and the number of OTFS subcarriers occupied in the Doppler domain.

4. The method according to claim 3, characterized in that The method further comprises: Based on the protocol agreement, determine the mapping position and / or mapping order of the SSB signal on the DD domain scheduling unit; According to the mapping position and / or mapping order, the SSB signal is mapped to the scheduling unit of the DD domain.

5. The method according to claim 4, characterized in that Determining the mapping position of the SSB signal on the DD domain scheduling unit includes at least one of the following: Determine the mapping position of PSS in the DD domain; Determine the mapping position of SSS in the DD domain; Determine a mapping position of PBCH in the DD domain; The position of the protection symbol of any one of the PSS, SSS and PBCH is determined, where the protection symbol includes a delay domain protection symbol and a Doppler domain protection symbol.

6. The method according to any one of claims 3 to 5, characterized in that The PSS, SSS and PBCH occupy different OTFS subcarriers in the Doppler domain, and / or the PSS, SSS and PBCH occupy different OTFS symbols in the delay domain.

7. The method according to any one of claims 4 to 6, characterized in that Determining the mapping order of the SSB signal on the DD domain scheduling unit includes any one of the following: The PSS / SSS / PBCH is arranged and mapped along the delay domain; The PSS / SSS / PBCH is mapped along the Doppler domain.

8. The method according to any one of claims 1 to 7, characterized in that The method further comprises: Performing a first transformation on the SSB signal, The first transformation is used to transform the SSB signal from the DD domain to the time-frequency domain.

9. The method according to claim 8, characterized in that The sending of the SSB signal to the terminal comprises: Based on the protocol agreement, determine the time domain position and / or frequency domain position of the SSB signal in the time and frequency domain; The SSB signal is sent to the terminal at the time domain position and / or frequency domain position agreed upon in the protocol.

10. The method according to claim 8 or 9, characterized in that: The performing a first transformation on the SSB signal comprises: A first transformation is performed on the SSB signal along the time domain or the frequency domain.

11. A communication method, characterized in that: The method is executed by a terminal, and includes: Receive the synchronous broadcast block SSB signal sent by the network device, The SSB signal is converted from the delay-Doppler (DD) domain of the orthogonal time-frequency-space (OTFS) system to the time-frequency domain of the orthogonal frequency-division multiplexing (OFDM) system.

12. The method according to claim 11, characterized in that The receiving network device sends a synchronous broadcast block SSB signal, comprising: Based on the protocol agreement, determine the time domain position and / or frequency domain position of the SSB signal in the time and frequency domain; The SSB signal is searched at the time domain position and / or the frequency domain position.

13. The method according to claim 11 or 12, characterized in that: The method further comprises: Performing a second transformation on the SSB signal, The second transformation is used to transform the SSB signal from the time-frequency domain to the DD domain.

14. The method according to claim 13, characterized in that The performing a second transformation on the SSB signal comprises: A second transformation is performed on the SSB signal along the delay domain or the Doppler domain.

15. The method according to any one of claims 11 to 14, characterized in that The method further comprises: Correlation detection is performed on the PSS in the SSB signal to demodulate the PSS.

16. The method according to claim 15, characterized in that The method further comprises: Perform channel estimation through the PSS to obtain channel information; Based on the channel information, the SSS and / or PBCH in the SSB signal are demodulated.

17. A communication device, characterized in that: The device comprises a transceiver module, which is used for: Send a synchronous broadcast block SSB signal to the terminal, The SSB signal is converted from the delay-Doppler (DD) domain of the orthogonal time-frequency-space (OTFS) system to the time-frequency domain of the orthogonal frequency-division multiplexing (OFDM) system.

18. A communication device, characterized in that: The device comprises a transceiver module, which is used for: Receive the synchronous broadcast block SSB signal sent by the network device, The SSB signal is converted from the delay-Doppler (DD) domain of the orthogonal time-frequency-space (OTFS) system to the time-frequency domain of the orthogonal frequency-division multiplexing (OFDM) system.

19. A communication device, wherein: 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 1-17.

20. A computer storage medium, wherein: 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 16 can be implemented.

21. A communication system, characterized in that: include: A network device and a terminal, wherein the network device is used to perform the method according to any one of claims 1 to 10; The terminal is used to execute the method according to any one of claims 11 to 16.

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