Communication methods, terminals, network devices and system

Abstract

The present disclosure relates to communication methods, terminals, network devices, and a system. A communication method comprises: a terminal acquiring first indication information sent by a network device; and, on the basis of the first indication information, determining frequency domain information of an uplink signal sent by the terminal. When the GNSS is temporarily unavailable, the embodiments of the present disclosure can ensure that terminals keep synchronous with uplink frequency domain of the network.

Description

Communication method, terminal, network device and system Technical Field

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

[0002] In the research of wireless communication technology, if there is a long signal transmission distance between the transmitter and the receiver, the data transmission will take a long time.

[0003] In order to ensure the quality of the transmission signal, it is usually undesirable for the communication signal to be out of synchronization.

[0004] Summary of the Invention

[0005] How to ensure signal synchronization if there is a long signal transmission distance between the sender and the receiver.

[0006] The embodiments of the present disclosure provide a communication method, a terminal, a network device, and a system.

[0007] According to a first aspect of an embodiment of the present disclosure, a communication method is proposed, including: a terminal obtaining first indication information sent by a network device; and determining frequency domain information of an uplink signal sent by the terminal based on the first indication information.

[0008] According to the second aspect of an embodiment of the present disclosure, a communication method is proposed, including: a network device sends first indication information to a terminal; wherein the first indication information is used to instruct the terminal to determine the frequency domain information of the uplink signal to be sent based on the first indication information.

[0009] According to a third aspect of an embodiment of the present disclosure, a communication method is proposed, including: a network device sends first indication information to a terminal; and the terminal determines frequency domain information of an uplink signal sent by the terminal based on the first indication information.

[0010] According to the fourth aspect of an embodiment of the present disclosure, a terminal is proposed, comprising: a transceiver module for obtaining first indication information sent by a network device; and a processing module for determining frequency domain information of an uplink signal sent by the terminal based on the first indication information.

[0011] According to the fifth aspect of an embodiment of the present disclosure, a network device is proposed, including: a transceiver module for sending first indication information to a terminal; wherein the first indication information is used to instruct the terminal to determine the frequency domain information of the uplink signal to be sent based on the first indication information.

[0012] According to a sixth aspect of an embodiment of the present disclosure, a terminal and one or more processors are proposed; wherein the processor is used to execute the communication method of the first aspect.

[0013] According to a seventh aspect of an embodiment of the present disclosure, a network device and one or more processors are proposed; wherein the processor is used to execute the communication method of the second aspect.

[0014] According to an eighth aspect of an embodiment of the present disclosure, a communication system is provided, including a terminal and a network device, wherein the terminal is configured to implement the communication method of the first aspect, and the network device is configured to implement the communication method of the second aspect.

[0015] According to a ninth aspect of an embodiment of the present disclosure, a storage medium is provided, wherein the storage medium stores instructions. When the instructions are executed on a communication device, the communication device executes the communication method of any one of the first and second aspects.

[0016] Through the embodiments of the present disclosure, it is possible to ensure that the terminal maintains uplink frequency domain synchronization with the network when the GNSS is temporarily unavailable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following drawings required for describing the embodiments are introduced. The following drawings are merely some embodiments of the present disclosure and do not impose specific limitations on the protection scope of the present disclosure.

[0018] FIG1A is a schematic diagram showing the architecture of a communication system according to an embodiment of the present disclosure.

[0019] FIG1B is a schematic diagram showing a state of uplink and downlink timing alignment according to an embodiment of the present disclosure.

[0020] FIG1C is a schematic diagram showing a state in which uplink and downlink timings are not aligned according to an embodiment of the present disclosure.

[0021] FIG1D is a schematic diagram showing how the magnitude of the Doppler frequency shift varies with time according to an exemplary embodiment.

[0022] FIG2A is an interactive schematic diagram illustrating a communication method according to an embodiment of the present disclosure.

[0023] FIG2B is a schematic diagram showing Doppler shift values ​​according to an embodiment of the present disclosure.

[0024] FIG2C is a schematic diagram showing Doppler shift rate according to an embodiment of the present disclosure.

[0025] FIG3A is a flow chart illustrating a communication method according to an embodiment of the present disclosure.

[0026] FIG3B is a flow chart illustrating a communication method according to an embodiment of the present disclosure.

[0027] FIG4A is a flow chart showing a communication method according to an embodiment of the present disclosure.

[0028] FIG4B is a flow chart illustrating a communication method according to an embodiment of the present disclosure.

[0029] FIG5 is an interactive diagram illustrating a communication method according to an embodiment of the present disclosure.

[0030] FIG6A is a schematic diagram of the structure of a terminal proposed in an embodiment of the present disclosure.

[0031] FIG6B is a schematic diagram of the structure of a network device proposed in an embodiment of the present disclosure.

[0032] FIG7A is a schematic structural diagram of a communication device proposed in an embodiment of the present disclosure.

[0033] FIG7B is a schematic diagram of the structure of the chip proposed in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0034] The embodiments of the present disclosure provide a communication method, a terminal, a network device, and a system.

[0035] In a first aspect, an embodiment of the present disclosure provides a communication method, including: a terminal obtaining first indication information sent by a network device;

[0036] Based on the first indication information, frequency domain information of the uplink signal sent by the terminal is determined.

[0037] In the above embodiment, the terminal obtains the instruction information of the network device to determine the frequency domain information for sending the uplink signal, and then performs frequency domain adjustment based on the uplink frequency domain information to ensure frequency domain synchronization of the uplink signal.

[0038] In combination with some embodiments of the first aspect, in some embodiments, determining the frequency domain information of the uplink signal sent by the terminal based on the first indication information includes: determining the frequency domain offset value used to adjust the frequency domain information of the uplink signal based on the first indication information; and determining the frequency domain information of the uplink signal sent by the terminal based on the frequency domain offset value.

[0039] In the above embodiment, the terminal determines the frequency domain information of the uplink signal through the frequency domain offset value in the first information, and can then achieve frequency domain synchronization based on the determined frequency domain information.

[0040] In combination with some embodiments of the first aspect, in some embodiments, the first indication information is used to indicate the Doppler frequency domain offset value of the target link; based on the first indication information, the frequency domain offset value used to adjust the frequency domain position of the uplink signal is determined, including: the Doppler frequency domain offset value of the target link, determined as the frequency domain offset value used to adjust the frequency domain position of the uplink signal.

[0041] In the above embodiment, the frequency domain offset value is represented by the Doppler offset value based on the target link, thereby achieving determination of the offset information.

[0042] In combination with some embodiments of the first aspect, in some embodiments, the first indication information is used to indicate information about the Doppler frequency domain offset rate of the target link; based on the first indication information, the frequency domain offset value is determined, including: based on the Doppler frequency domain offset rate of the target link and the transmission delay of the target link, determining the frequency domain offset value used to adjust the frequency domain position of the uplink signal.

[0043] In the above embodiment, the frequency domain offset value is indirectly represented based on the Doppler shift rate of the target link and the transmission delay of the target link, thereby achieving determination of the bias information.

[0044] In combination with some embodiments of the first aspect, in some embodiments, the target link includes at least one of the following: a target link between the terminal and the network device; a target link between the terminal and the uplink synchronization reference point.

[0045] In combination with some embodiments of the first aspect, in some embodiments, the frequency domain offset value includes an absolute offset value; determined based on carrier frequency information and the absolute offset value.

[0046] In the above embodiment, the terminal may determine the frequency domain offset value based on two different offset value types.

[0047] In combination with some embodiments of the first aspect, in some embodiments, the frequency domain offset value includes a relative offset value; the frequency domain information of the uplink signal sent by the terminal is determined based on the carrier frequency information, the absolute offset value and the relative offset value, and the absolute offset value is determined based on the frequency domain adjustment value determined last time.

[0048] In the above embodiment, the terminal calculates the corresponding frequency domain offset value through the relative offset value.

[0049] In combination with some embodiments of the first aspect, in some embodiments, the first indication information is carried based on at least one of the following: system information, radio resource control RRC signaling, media access layer control unit MAC CE, physical layer signaling or downlink control information DCI.

[0050] In combination with some embodiments of the first aspect, in some embodiments, second indication information is sent; the second indication information is used to indicate that the terminal has the ability to determine the frequency domain information based on the first indication information.

[0051] In the above embodiment, the network device may send the first indication information when it is learned that the terminal has the capability of determining frequency domain information, thereby avoiding unnecessary resource overhead.

[0052] In combination with some embodiments of the first aspect, in some embodiments, when it is determined that the global navigation satellite system GNSS of the terminal is in an unavailable state, the terminal determines the frequency domain information of the uplink signal sent by the terminal based on the first indication information sent by the network device.

[0053] In combination with some embodiments of the first aspect, in some embodiments, when it is determined that the uplink synchronization error of the terminal exceeds the error range, the terminal determines the frequency domain information of the uplink signal sent by the terminal based on the first indication information sent by the network device.

[0054] In a second aspect, an embodiment of the present disclosure proposes a communication method, including: a network device sends first indication information to a terminal; wherein the first indication information is used to instruct the terminal to determine the frequency domain information of the uplink signal to be sent based on the first indication information.

[0055] In the above embodiment, the network device sends indication information so that the terminal determines the frequency domain information for sending the uplink signal, and then performs frequency domain adjustment based on the uplink frequency domain information to ensure frequency domain synchronization of the uplink signal.

[0056] In combination with some embodiments of the second aspect, in some embodiments, the first indication information includes a frequency offset value, and the frequency domain information is determined based on the frequency domain offset value.

[0057] In combination with some embodiments of the second aspect, in some embodiments, the frequency domain offset value is a Doppler frequency domain offset value of the target link.

[0058] In combination with some embodiments of the second aspect, in some embodiments, the first indication information is used to indicate information about the Doppler frequency domain offset rate of the target link; the Doppler frequency domain offset rate of the target link and the transmission delay of the target link are determined.

[0059] In combination with some embodiments of the second aspect, in some embodiments, the target link includes at least one of the following: a target link between the terminal and the network device; a target link between the terminal and the uplink synchronization reference point.

[0060] In combination with some embodiments of the second aspect, in some embodiments, the frequency domain offset value includes an absolute offset value; the frequency domain information of the uplink signal sent by the terminal is determined based on carrier frequency information and the absolute offset value.

[0061] In combination with some embodiments of the second aspect, in some embodiments, the frequency domain offset value includes a relative offset value; the frequency domain information of the uplink signal sent by the terminal is determined based on the carrier frequency information, the absolute offset value and the relative offset value, and the absolute offset value is determined based on the frequency domain adjustment value determined last time.

[0062] In combination with some embodiments of the second aspect, in some embodiments, the first indication information is carried based on at least one of the following: system information, radio resource control RRC signaling, media access layer control unit MAC CE, physical layer signaling or downlink control information DCI.

[0063] In combination with some embodiments of the second aspect, in some embodiments, second indication information is obtained; the second indication information is used to indicate that: the terminal has the ability to determine the frequency domain information based on the first indication information.

[0064] In combination with some embodiments of the second aspect, in some embodiments, when the global navigation satellite system GNSS of the terminal is in an unavailable state, the network device sends first indication information to the terminal.

[0065] In combination with some embodiments of the second aspect, in some embodiments, when the global navigation satellite system GNSS of the terminal is in an unavailable state, the network device sends first indication information to the terminal.

[0066] In a third aspect, an embodiment of the present disclosure proposes a positioning method, which includes: a network device sends first indication information to a terminal; and the terminal determines frequency domain information of an uplink signal sent by the terminal based on the first indication information.

[0067] In a fourth aspect, an embodiment of the present disclosure proposes a terminal, comprising: a transceiver module for acquiring first indication information sent by a network device; and a processing module for determining frequency domain information of an uplink signal sent by the terminal based on the first indication information.

[0068] In combination with some embodiments of the fourth aspect, in some embodiments, the processing module determines the frequency domain information of the uplink signal sent by the terminal based on the first indication information in the following manner: based on the first indication information, determines the frequency domain offset value used to adjust the frequency domain information of the uplink signal; based on the frequency domain offset value, determines the frequency domain information of the uplink signal sent by the terminal.

[0069] In combination with some embodiments of the fourth aspect, in some embodiments, when the first indication information is used to indicate the Doppler frequency domain offset value of the target link, the processing module determines the frequency domain offset value for adjusting the frequency domain position of the uplink signal based on the first indication information in the following manner: determining the Doppler frequency domain offset value of the target link as the frequency domain offset value for adjusting the frequency domain position of the uplink signal,

[0070] In combination with some embodiments of the fourth aspect, in some embodiments, when the first indication information is used to indicate the Doppler frequency domain offset rate of the target link, the processing module determines the frequency domain offset value based on the first indication information in the following manner: based on the Doppler frequency domain offset rate of the target link and the transmission delay of the target link, determine the frequency domain offset value used to adjust the frequency domain position of the uplink signal.

[0071] In combination with some embodiments of the fourth aspect, in some embodiments, the target link includes at least one of the following: a target link between the terminal and the network device; a target link between the terminal and the uplink synchronization reference point.

[0072] In combination with some embodiments of the fourth aspect, in some embodiments, when the frequency domain offset value includes an absolute offset value, the processing module determines the frequency domain information of sending the uplink signal based on the carrier frequency information and the absolute offset value.

[0073] In combination with some embodiments of the fourth aspect, in some embodiments, when the frequency domain offset value includes a relative offset value, the processing module determines the frequency domain information of the uplink signal to be sent based on the carrier frequency information, the absolute offset value and the relative offset value, and the absolute offset value is determined based on the frequency domain adjustment value determined last time.

[0074] In combination with some embodiments of the fourth aspect, in some embodiments, the first indication information is based on at least one of the following bearers: system information, radio resource control RRC signaling, media access layer control unit MAC CE, physical layer signaling or downlink control information DCI.

[0075] In combination with some embodiments of the fourth aspect, in some embodiments, the transceiver module is further used to send second indication information; wherein the second indication information is used to indicate that the terminal has the ability to determine frequency domain information based on the first indication information.

[0076] In combination with some embodiments of the fourth aspect, in some embodiments, the transceiver module is further used to obtain first indication information sent by the network device when the global navigation satellite system GNSS of the terminal is in an unavailable state.

[0077] In combination with some embodiments of the fourth aspect, in some embodiments, the processing module is also used to determine the status of the global navigation satellite system GNSS of the terminal, and when the status of the global navigation satellite system GNSS of the terminal is unavailable, determine the frequency domain information of the uplink signal sent by the terminal based on the first indication information.

[0078] In combination with some embodiments of the fourth aspect, in some embodiments, the transceiver module is further used to obtain first indication information sent by the network device when it is determined that the uplink synchronization error of the terminal exceeds the error range.

[0079] In combination with some embodiments of the fourth aspect, in some embodiments, the processing module is also used to determine the uplink synchronization error of the terminal, and determine the frequency domain information of the uplink signal sent by the terminal based on the first indication information when the uplink synchronization error of the terminal exceeds the error range.

[0080] In the fifth aspect, an embodiment of the present disclosure proposes a network device, including: a transceiver module, used to send first indication information to a terminal; wherein, the first indication information is used to instruct the terminal to determine the frequency domain information of the uplink signal to be sent based on the first indication information.

[0081] In combination with some embodiments of the fifth aspect, in some embodiments, the first indication information includes a frequency offset value, and the frequency domain information is determined based on the frequency domain offset value.

[0082] In combination with some embodiments of the fifth aspect, in some embodiments, the first indication information is used to indicate a Doppler frequency domain offset value of the target link; the frequency domain offset value is the Doppler frequency domain offset value of the target link.

[0083] In combination with some embodiments of the fifth aspect, in some embodiments, the first indication information is used to indicate information about the Doppler frequency domain offset rate of the target link; the frequency domain offset value is determined based on the Doppler frequency domain offset rate of the target link and the transmission delay of the target link.

[0084] In combination with some embodiments of the fifth aspect, in some embodiments, the target link includes at least one of the following: a target link between the terminal and the network device; a target link between the terminal and the uplink synchronization reference point.

[0085] In combination with some embodiments of the fifth aspect, in some embodiments, the frequency domain offset value includes an absolute offset value; the frequency domain information of the uplink signal sent by the terminal is determined based on the carrier frequency information and the absolute offset value.

[0086] In combination with some embodiments of the fifth aspect, in some embodiments, the frequency domain offset value includes a relative offset value; the frequency domain information of the uplink signal sent by the terminal is determined based on the carrier frequency information, the absolute offset value and the relative offset value, and the absolute offset value is determined based on the frequency domain adjustment value determined last time.

[0087] In combination with some embodiments of the fifth aspect, in some embodiments, the first indication information is based on at least one of the following bearers: system information, radio resource control RRC signaling, media access layer control unit MAC CE, physical layer signaling or downlink control information DCI.

[0088] In combination with some embodiments of the fifth aspect, in some embodiments, the transceiver module is further used to: obtain second indication information; the second indication information is used to indicate that the terminal has the ability to determine the frequency domain information based on the first indication information.

[0089] In combination with some embodiments of the fifth aspect, in some embodiments, the transceiver module is further used to: send first indication information to the terminal when the global navigation satellite system GNSS of the terminal is in an unavailable state.

[0090] In combination with some embodiments of the fifth aspect, in some embodiments, the transceiver module is further used to: send first indication information to the terminal when the uplink synchronization error of the terminal exceeds the error range.

[0091] In a sixth aspect, an embodiment of the present disclosure proposes a terminal, comprising: one or more processors; wherein the processor is used to execute the communication method of the first aspect.

[0092] In a seventh aspect, an embodiment of the present disclosure proposes a network device, comprising: one or more processors; wherein the processor is used to execute the communication method of the second aspect.

[0093] In an eighth aspect, an embodiment of the present disclosure proposes a communication system, comprising: a terminal and a network device, wherein the terminal is configured to implement the communication method of the first aspect, and the network device is configured to implement the communication method of the second aspect.

[0094] In a ninth aspect, an embodiment of the present disclosure proposes a storage medium storing instructions, which, when the instructions are executed on a communication device, enables the communication device to execute any one of the communication methods of the first aspect and the second aspect.

[0095] The present disclosure provides communication methods, terminals, network devices, and systems. In some embodiments, the terms "communication method" and "information processing method" and "data processing method" are interchangeable; the terms "communication device" and "information processing device" and "data processing device" are interchangeable; and the terms "information processing system" and "communication system" are interchangeable.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0101] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0102] In some embodiments, descriptions such as "at least one of A and B," "A and / or B," "A in one case, B in another case," or "in response to one case A, in response to another case B" may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); and in some embodiments, A and B (both A and B are executed). The above is also applicable when there are more branches such as A, B, and C.

[0103] In some embodiments, "A or B" and other descriptions may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The above is also applicable when there are more branches such as A, B, C, etc.

[0104] 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.

[0105] 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.

[0106] In some embodiments, terms such as "time / frequency" and "time / frequency domain" refer to the time domain and / or the frequency domain.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] In some embodiments, "network" can be interpreted as devices included in the network (eg, access network equipment, core network equipment, etc.).

[0111] In some embodiments, the terms "access network device (AN device)", "radio access network device (RAN device)", "base station (BS)", "radio base station" "fixed station", "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)" "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "serving cell", "carrier", "component carrier", "bandwidth part (BWP)" and the like may be used interchangeably.

[0112] 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.

[0113] 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, device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, it is also possible to set the structure in which the terminal has all or part of the functions of the access network device. In addition, terms such as "uplink" and "downlink" can also be replaced by terms 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.

[0114] 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.

[0115] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0116] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0117] In addition, each element, each row, or each column in the table of the embodiment of the present disclosure can be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns can also be implemented as an independent embodiment.

[0118] FIG1A is a schematic diagram illustrating the architecture of a communication system according to an embodiment of the present disclosure. As shown in FIG1A , a communication system 100 includes a terminal 101 and a network device 102 .

[0119] In some embodiments, the terminal 101 includes, for example, a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer, a computer with wireless transceiver function, 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.

[0120] In some embodiments, the network device 102 may include at least one of an access network device and a core network device.

[0121] In some embodiments, the access network device is, for example, a node or device that accesses a terminal to a wireless network. The access network device may include an evolved NodeB (eNB), a next generation evolved NodeB (ng-eNB), a next generation NodeB (gNB) in a 5G communication system, 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 Wi-Fi system, but is not limited thereto.

[0122] 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 the Open RAN, and the processes and information interactions between these internal interfaces can be implemented through software or programs.

[0123] 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.

[0124] In some embodiments, the core network device may be a single device including a first network element, a second network element, etc., or may be a plurality of devices or a group of devices, each including all or part of the first network element, the second network element, etc. The 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).

[0125] 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.

[0126] The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1A , or a portion thereof, but are not limited thereto. The entities shown in FIG1A are illustrative only. The communication system may include all or part of the entities shown in FIG1A , or may include other entities other than those shown in FIG1A . The number and form of the entities may be arbitrary, and the entities may be physical or virtual. The connection relationships between the entities are illustrative only. The entities may be connected or disconnected, and the connection may be in any manner, including direct or indirect, wired or wireless.

[0127] The embodiments of the present disclosure can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), future radio access (FRA), new radio access technology (RAT), new radio (NR), new radio access (NX), future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), Public Land Mobile Network (PLMN) networks, Device-to-Device (D2D) systems, Machine-to-Machine (M2M) systems, Internet of Things (IoT) systems, Vehicle-to-Everything (V2X), systems utilizing other communication methods, and next-generation systems based on and extending these methods. Furthermore, multiple systems may be combined (for example, a combination of LTE or LTE-A with 5G).

[0128] In the research of wireless communication technology, if there is a long signal transmission distance between the transmitter and the receiver, the data transmission will take a long time.

[0129] In some embodiments, there is a scenario where there is a long signal transmission distance between the transmitting end and the receiving end, such as a satellite communication scenario, and the signal transmission between the terminal and the satellite can be understood as the signal transmission between the transmitting end and the receiving end.

[0130] It can be understood that the satellite communication scenario mentioned in the above embodiments refers to a scenario in which radio communication equipment (eg, a terminal) on the ground communicates using a satellite as a relay.

[0131] In some embodiments, in a communication scenario with both uplink and downlink communication, in order to ensure the quality of the transmitted signal, it is generally desired that the uplink and downlink communication signals remain synchronized in the time domain, that is, "timing alignment" is desired.

[0132] For example, Figure 1B is a schematic diagram illustrating a state of uplink and downlink timing alignment according to an embodiment of the present disclosure. As shown in Figure 1B , for uplink information obtained by a network device (i.e., the gNB UL in the figure) and downlink information sent by the network device (i.e., the gNB DL in the figure), the time domain resources where the time domain unit number "n" resides are aligned. This can be understood as achieving timing alignment for uplink and downlink communications for the network device.

[0133] In some embodiments, in a communication scenario with an uplink and downlink relationship, in order to ensure the quality of the transmitted signal, it is generally undesirable for the uplink and downlink communication signals to be out of sync, that is, "timing misalignment" is undesirable.

[0134] For example, Figure 1C is a schematic diagram illustrating a state of uplink and downlink timing misalignment according to an embodiment of the present disclosure. As shown in Figure 1C, for the uplink information obtained by the network device (i.e., the gNB UL in the figure) and the downlink information sent by the network device (i.e., the gNB DL in the figure), the time domain resources where the time domain unit number "n" resides are misaligned. This can be understood as a timing misalignment of uplink and downlink communications for the network device.

[0135] In order to avoid the problem of misalignment of uplink and downlink communications, for communications with uplink and downlink relationships, the transmission delay can be compensated by introducing a timing offset value parameter, so that timing alignment can be achieved for communications with uplink and downlink relationships.

[0136] Optionally, the timing offset value parameter can be applied to various operations, such as: transmission of the physical uplink shared channel (PUSCH) based on downlink control information (DCI) scheduling, transmission based on hybrid automatic repeat request (HARQ), and transmission of the media access layer control element (MAC Control Element, MAC CE).

[0137] In some embodiments, when no network connection is established, the terminal obtains uplink time and frequency synchronization by sending a Physical Random Access Channel (PRACH).

[0138] It is understandable that the PRACH signal sent by the terminal will be affected by the high-speed movement of the satellite, such as the Doppler frequency offset of the service link and the Doppler frequency offset of the feeder link. Since the network equipment needs to serve multiple terminals, it is necessary to ensure the orthogonality between the terminals, which means that the signals sent by terminals located in different locations and corresponding to different transmission delays can reach the network device at the same time (or within the allowed time zone). Otherwise, the network equipment may not be able to demodulate the correct PRACH signal, or it may not be able to distinguish the PRACH signals from different terminals from the received PRACH signal.

[0139] Therefore, the key point for uplink synchronization technology is how to deal with the large Doppler frequency offset in the PRACH signal and ensure that the PRACH signals sent by terminals at different locations arrive at the base station at the same time or within a range, for example, with the same cyclic prefix (CP).

[0140] It is understandable that the high-speed movement of non-synchronous satellites will cause significant Doppler frequency shift, and will also cause the transmission distance between the satellite and the terminal to continuously change, which in turn will require the terminal's timing advance to continuously change.

[0141] For example, the calculation of Doppler frequency deviation at different carrier frequencies is shown in the following table. As can be seen from the table, in a low-orbit satellite scenario with an altitude of 600 km, the satellite speed is as high as 7.56 km / s and the maximum Doppler frequency deviation is as high as 24 ppm.

[0142] In some embodiments, for the Doppler frequency deviation problem generated in the above scenario, the terminal usually relies on its own Global Navigation Satellite System (GNSS) module to obtain its own position, and obtains satellite ephemeris information based on the broadcast information of the network device, calculates the Doppler deviation of the service link, and then performs pre-compensation based on the Doppler deviation.

[0143] However, in the above embodiment, the terminal needs to obtain location information to determine the timing compensation of the uplink transmission. For example, the terminal can determine its own location information through a measurement module related to the Global Navigation Satellite System (GNSS).

[0144] It is understandable that GNSS information has a validity period (also known as reliability time). After the terminal obtains the GNSS measurement result through measurement, the terminal reports the GNSS validity period information (Global Navigation Satellite System validity duration) to the network device.

[0145] Understandably, when the GNSS validity period expires, the terminal enters the idle state. In some communication scenarios, when the terminal's GNSS is inaccurate or its GNSS location information is unavailable, the terminal needs to maintain a Radio Resource Control (RRC) connection for at least several minutes. In this case, the Doppler offset will continue to increase over time.

[0146] For example, Figure 1D is a schematic diagram showing how the Doppler frequency shift varies with time, according to an exemplary embodiment. As shown in Figure 1D, the Doppler magnitudes corresponding to terminals with different initial elevation angles vary differently over time, but are all positively correlated with time.

[0147] Therefore, when the GNSS validity period expires, the solution of performing pre-compensation by calculating the Doppler shift of the service link in the above embodiment cannot meet the requirement of uplink frequency domain synchronization.

[0148] Based on the above problems, the embodiments of the present disclosure provide a communication method, a terminal, a network device, and a system.

[0149] FIG2A is an interactive diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG2A , the embodiment of the present disclosure relates to a communication method, and the method includes:

[0150] Step S2101: The network device 102 sends first indication information.

[0151] In some embodiments, the terminal 101 obtains first indication information.

[0152] In some embodiments, the terminal 101 obtains first indication information sent by the network device 102.

[0153] In some embodiments, the GNSS of the terminal 101 is in an unavailable state, and the network device 102 sends the first indication information.

[0154] In some embodiments, the GNSS of the terminal 101 is in an unavailable state, and the terminal 101 obtains the first indication information sent by the network device 102.

[0155] In some embodiments, the terminal 101 determines that the GNSS of the terminal 101 is in an unavailable state.

[0156] In some embodiments, when the uplink synchronization error of the terminal 101 exceeds the error range, the network device 102 sends first indication information to the terminal 101.

[0157] In some embodiments, when it is determined that the uplink synchronization error of the terminal 101 exceeds the error range, the terminal 101 obtains the first indication information sent by the network device 102.

[0158] In some embodiments, terminal 101 determines that the uplink synchronization error of terminal 101 exceeds an error range.

[0159] Optionally, the terminal 101 determines that the GNSS of the terminal 101 is in an unavailable state by determining that the uplink synchronization error of the terminal 101 exceeds the error range.

[0160] In some embodiments, the first information is used to indicate frequency domain information of the uplink signal sent by the terminal 101.

[0161] In some embodiments, the network device 102 may also determine the frequency domain information of the uplink signal sent by the terminal 101 based on the first indication information, so as to receive the uplink signal sent by the terminal at the frequency domain position.

[0162] In some embodiments, the frequency domain offset information includes at least one of the following: a Doppler frequency domain offset value of the target link, or a Doppler shift rate of the target link and a transmission delay of the target link.

[0163] In some embodiments, the target link includes at least one of the following:

[0164] The target link between the terminal 101 and the network device 102, or the target link between the terminal 101 and the uplink synchronization reference point.

[0165] It can be understood that the network device 102 can be an access network device, including, for example, a base station (gNB), and / or a communication satellite, etc.

[0166] Based on this, the target link between the terminal 101 and the network device 102 can be understood as: the target link between the terminal 101 and the base station, and / or the target link between the terminal 101 and the communication satellite.

[0167] It can be understood that the uplink synchronization reference point can be determined based on a pre-definition or a pre-configuration.

[0168] In some embodiments, the first indication information is carried based on at least one of the following: system information, RRC signaling, MAC CE, physical layer signaling or downlink control information (DCI).

[0169] In some embodiments, the network device 102 sends system information carrying the first indication information to the terminal 101 .

[0170] In some embodiments, the network device 102 sends RRC signaling carrying the first indication information to the terminal 101.

[0171] In some embodiments, the network device 102 sends a MAC CE carrying first indication information to the terminal 101 .

[0172] In some embodiments, the network device 102 sends a DCI carrying the first indication information to the terminal 101 .

[0173] 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.

[0174] 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.

[0175] In some embodiments, "obtain", "get", "get", "receive", "transmit", "bidirectional transmission", "send and / or receive" can be interchangeable, and can be interpreted as receiving from other entities, obtaining from protocols, obtaining from higher layers, obtaining by self-processing, autonomous implementation, etc.

[0176] In some embodiments, terms such as "send", "transmit", "report", "download", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0177] Step S2102: Terminal 101 sends second indication information.

[0178] In some embodiments, the network device 102 obtains the second indication information.

[0179] In some embodiments, the network device 102 obtains the second indication information sent by the terminal 101.

[0180] In some embodiments, the second information is used to indicate whether the terminal 101 has the ability to determine frequency domain information.

[0181] In some embodiments, when the terminal 101 has the capability of determining frequency domain information based on the first indication information, the terminal 101 obtains the first indication information sent by the network device 102 .

[0182] In step S2103 , the terminal 101 determines frequency domain information of the uplink signal based on the first indication information.

[0183] In some embodiments, when it is determined that the uplink synchronization error of the terminal 101 exceeds the error range, the terminal 101 determines the frequency domain information of the uplink signal based on the first indication information.

[0184] Optionally, when it is determined that the uplink synchronization error of the terminal 101 exceeds the error range, the terminal 101 obtains first indication information sent by the network device 102, and determines frequency domain information of the uplink signal sent by the terminal 101 based on the first indication information.

[0185] In some embodiments, when it is determined that the GNSS of the terminal 101 is in an unavailable state, the terminal 101 determines the frequency domain information of the uplink signal based on the first indication information.

[0186] Optionally, when it is determined that the GNSS of the terminal 101 is in an unavailable state, the terminal 101 obtains first indication information sent by the network device 102, and determines frequency domain information of the uplink signal sent by the terminal 101 based on the first indication information.

[0187] In some embodiments, the terminal 101 determines the frequency domain information of the uplink signal based on the first indication information, including, for example:

[0188] -A) The terminal 101 determines the frequency domain information of the uplink signal sent by the terminal 101 based on the frequency domain offset value.

[0189] -B) The terminal 101 determines the frequency domain information of the uplink signal sent by the terminal 101 based on the Doppler frequency domain shift rate of the target link and the transmission delay of the target link.

[0190] It is understood that, following the embodiment in step S2101, the first indication information is used to indicate the frequency domain offset information of the target link. Furthermore, the frequency domain offset information includes at least one of the following: a Doppler frequency domain offset value of the target link, a Doppler shift rate of the target link, and a transmission delay of the target link.

[0191] Therefore, for the terminal 101 to determine the frequency domain information of the uplink signal based on the first indication information, the above two situations -A) and -B) may be included.

[0192] For -A) situation,

[0193] In some embodiments, the terminal 101 determines a frequency domain offset value for adjusting the frequency domain position of the uplink signal based on the first indication information.

[0194] In some embodiments, the terminal 101 determines the frequency domain offset value for adjusting the frequency domain position of the uplink signal based on the first indication information, including: determining the Doppler frequency domain offset value of the target link as the frequency domain offset value for adjusting the frequency domain position of the uplink signal.

[0195] In some embodiments, the Doppler shift value may be an absolute shift value or a relative shift value.

[0196] In some embodiments, the frequency domain information of the uplink signal sent by the terminal 101 is determined by carrier frequency information and an absolute offset value.

[0197] In some embodiments, the frequency domain offset value can be divided into an absolute offset value and a relative offset value.

[0198] For example, Figure 2B is a schematic diagram illustrating Doppler shift values ​​according to an embodiment of the present disclosure. As shown in Figure 2B, the frequency domain values ​​of frequency domain resource 1 (FAC1), frequency domain resource 2 (FAC2), and frequency domain resource 3 (FAC3) relative to the starting frequency domain resource position are a, b, and c, respectively. a, b, and c can be referred to as the absolute shift values ​​corresponding to frequency domain resource 1, frequency domain resource 2, and frequency domain resource 3, respectively.

[0199] It can be understood that the starting frequency domain resource position can be regarded as the frequency corresponding to the carrier frequency information, or other frequencies that can be used as a reference.

[0200] Optionally, the starting frequency domain resource position may be a frequency domain resource position set in the frequency domain, and is not limited to 0.

[0201] Based on this, it can be known that when the absolute offset value is known, the frequency of the frequency domain resource corresponding to the uplink signal sent by the terminal 101 can be determined through the carrier frequency information and the absolute offset value.

[0202] In some embodiments, frequency domain information of the uplink signal sent by terminal 101 is determined based on carrier frequency information, an absolute offset value, and a relative offset value, wherein the absolute offset value is determined based on a last determined frequency domain adjustment value.

[0203] Exemplarily, continuing with the embodiment of FIG2B , the frequency domain value of the frequency domain resource 1 relative to the starting frequency domain resource position is a, and a can be called the absolute offset value of the frequency domain resource 1 relative to the starting frequency domain resource position.

[0204] It is understandable that Figure 2B can represent a scenario with two frequency domain adjustments. In this scenario, it is known that adjusting the frequency domain resource position of frequency domain resource 1 to the frequency domain resource position of frequency domain resource 2 can be understood as the first frequency domain adjustment, and the frequency domain offset value of frequency domain resource 2 relative to frequency domain resource 1 is d. Therefore, during the first frequency domain adjustment process, the absolute offset value of frequency domain resource 2 can be determined by the absolute offset value of frequency domain resource 1 and the frequency domain offset value of frequency domain resource 2 relative to frequency domain resource 1 is d, that is, the absolute offset value of frequency domain resource 2 is a+d.

[0205] It can also be understood that in this scenario, adjusting the frequency domain resource position of frequency domain resource 2 to the frequency domain resource position of frequency domain resource 3 can be regarded as a second frequency domain adjustment, and the frequency domain offset value of frequency domain resource 3 relative to frequency domain resource 2 is e. When the absolute offset value (a+d) of frequency domain resource 2 is known, when the relative offset value e is obtained through the first indication information, the absolute offset value of frequency domain resource 3 can be calculated.

[0206] In summary, it can be known that when the absolute offset value corresponding to the frequency domain resources adjusted last time (that is, the frequency domain adjustment value determined last time) and the relative offset value used for the current adjustment are known, the absolute offset value corresponding to the frequency domain resources adjusted currently can be known, that is, the currently determined frequency domain adjustment value.

[0207] Based on this, it can be known that when the carrier frequency information, the absolute offset value and the relative offset value are known, the frequency of the frequency domain resource corresponding to the uplink signal sent by the terminal 101 can be determined.

[0208] It can be understood that case -A) describes a situation where the first indication information can directly indicate an offset value, and then the frequency domain information of the uplink signal is determined based on the indicated offset value.

[0209] For -B),

[0210] In some embodiments, the first indication information is used to indicate information about the Doppler frequency domain offset rate of the target link.

[0211] It's understood that the Doppler shift rate represents the frequency offset that changes over time when a terminal and network equipment are in relative motion. In other words, the Doppler shift rate describes the offset (i.e., frequency offset) of the signal frequency acquired at different time points relative to the original transmitted frequency domain.

[0212] Based on this, in case -B), the frequency offset value can be indirectly calculated using the Doppler shift rate and the transmission delay of the target link.

[0213] In some embodiments, determining a frequency domain offset value based on the first indication information includes:

[0214] Based on the Doppler frequency domain offset rate of the target link and the transmission delay of the target link, a frequency domain offset value for adjusting the frequency domain position of the uplink signal is determined.

[0215] In some embodiments, the Doppler shift rate may be measured by terminal 101 based on an arrived reference signal.

[0216] For example, Figure 2C is a schematic diagram illustrating Doppler shift rates according to an embodiment of the present disclosure. As shown in Figure 2C, frequency domain resource 1 (FAC1), frequency domain resource 2 (FAC2), and frequency domain resource 3 (FAC3) correspond to time domain positions A, B, and C, respectively. Terminal 101 can obtain the Doppler shift rates (i.e., the expression for line segment m) for frequency domain resource 1, frequency domain resource 2, and frequency domain resource 3 through measurement.

[0217] It can be understood that the frequency domain offset value can be solved based on the following formula:

[0218] Among them, △f represents the frequency domain offset, τ represents the time delay, Based on this, when the Doppler shift rate and the target link delay are known, the corresponding frequency offset value can be obtained.

[0219] It can be understood that the -B) case describes the situation where the first indication information can indirectly indicate the offset rate and the target link propagation delay, and then determine the frequency domain information of the uplink signal based on the indicated offset rate and the target link propagation delay.

[0220] 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.

[0221] 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.

[0222] In some embodiments, terms such as "certain", "preset", "preset", "setting", "indicated", "a certain", "any", and "first" can be interchangeable. "Specific A", "preset A", "preset A", "setting A", "indicated A", "a certain A", "any A", and "first A" can be interpreted as A pre-specified in a protocol, etc., or as A obtained through setting, configuration, or indication, etc., or as specific A, a certain A, any A, or first A, etc., but not limited to this.

[0223] In some embodiments, "not expecting to receive" can be interpreted as not receiving on time domain resources and / or frequency domain resources, or as not performing subsequent processing on the data after receiving it; "not expecting to send" can be interpreted as not sending, or as sending but not expecting the recipient to respond to the content sent.

[0224] The communication method involved in the embodiments of the present disclosure may include at least one of steps S2101 to S2103. For example, step S2101 may be implemented as an independent embodiment, step S2102 may be implemented as an independent embodiment, step S2103 may be implemented as an independent embodiment, step S2101 + step S2103 may be implemented as an independent embodiment, and step S2101 + step S2102 + step S2103 may be implemented as independent embodiments, but the present invention is not limited thereto.

[0225] In some embodiments, steps S2101 and S2102 may be executed in an interchanged order or simultaneously.

[0226] In some embodiments, step S2101 and step S2102 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0227] In some embodiments, step S2101 and step S2103 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0228] In some embodiments, step S2102 and step S2103 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0229] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 2A , FIG. 2B , and FIG. 2C .

[0230] 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, which includes:

[0231] Step S3101: Obtain first indication information.

[0232] The optional implementation of step S3101 can refer to the optional implementation of step S2101 in Figure 2A and other related parts in the embodiments involved in Figures 2A, 2B and 2C, which will not be repeated here.

[0233] In some embodiments, the terminal 101 receives the first indication information sent by the network device 102, but is not limited thereto. The terminal 101 may also receive the first indication information sent by other entities.

[0234] In some embodiments, the terminal 101 obtains first indication information specified by the protocol.

[0235] In some embodiments, the terminal 101 obtains the first indication information from an upper layer(s).

[0236] In some embodiments, the terminal 101 performs processing to obtain the first indication information.

[0237] In some embodiments, step S3101 is omitted, and the terminal 101 autonomously implements the function indicated by the first indication information, or the above function is default or acquiescent.

[0238] Step S3102: Send the second indication information.

[0239] The optional implementation of step S3102 can refer to the optional implementation of step S2102 in Figure 2A and other related parts in the embodiments involved in Figures 2A, 2B and 2C, which will not be repeated here.

[0240] Step S3103: Determine frequency domain information of the uplink signal based on the first indication information.

[0241] The optional implementation of step S3103 can refer to the optional implementation of step S2103 in Figure 2A and other related parts in the embodiments involved in Figures 2A, 2B and 2C, which will not be repeated here.

[0242] The optional implementation of step S3101 can refer to the optional implementation of step S2101 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0243] The communication method involved in the embodiments of the present disclosure may include at least one of steps S3101 to S3103. For example, step S3101 may be implemented as an independent embodiment, step S3102 may be implemented as an independent embodiment, step S3103 may be implemented as an independent embodiment, step S3101 + step S3103 may be implemented as an independent embodiment, and step S3101 + step S3102 + step S3103 may be implemented as independent embodiments, but the present invention is not limited thereto.

[0244] In some embodiments, steps S3101 and S3102 may be executed in an interchanged order or simultaneously.

[0245] In some embodiments, step S3101 and step S32102 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0246] In some embodiments, step S3101 and step S3103 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0247] In some embodiments, step S3102 and step S3103 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0248] FIG3B is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG3B , the embodiment of the present disclosure relates to a communication method, and the method includes:

[0249] Step S3201: Obtain first indication information.

[0250] The optional implementation of step S3201 can refer to the optional implementation of step S2101 in Figure 2A, the optional implementation of step S3101 and step S3102 in Figure 3A, and other related parts in the embodiments involved in Figures 2A, 2B, 2C and 3A, which will not be repeated here.

[0251] Step S3202: Perform extended uplink transmission based on the first indication information.

[0252] The optional implementation of step S3202 can refer to the optional implementation of step S2103 in Figure 2A, the optional implementation of step S3103 in Figure 3A, and other related parts in the embodiments involved in Figures 2A, 2B, 2C and 3A, which will not be repeated here.

[0253] In some embodiments, based on the first indication information, determining the frequency domain information of the uplink signal sent by the terminal includes: based on the first indication information, determining the frequency domain offset value used to adjust the frequency domain information of the uplink signal; based on the frequency domain offset value, determining the frequency domain information of the uplink signal sent by the terminal.

[0254] In some embodiments, the first indication information is used to indicate the Doppler frequency domain offset value of the target link; based on the first indication information, the frequency domain offset value used to adjust the frequency domain position of the uplink signal is determined, including: determining the Doppler frequency domain offset value of the target link as the frequency domain offset value used to adjust the frequency domain position of the uplink signal.

[0255] In some embodiments, the first indication information is used to indicate the Doppler frequency domain offset rate of the target link; based on the first indication information, the frequency domain offset value is determined, including: based on the Doppler frequency domain offset rate of the target link and the transmission delay of the target link, determining the frequency domain offset value used to adjust the frequency domain position of the uplink signal.

[0256] In some embodiments, the target link includes at least one of the following: a target link between the terminal and the network device; a target link between the terminal and an uplink synchronization reference point.

[0257] In some embodiments, the frequency domain offset value includes an absolute offset value; and is determined based on carrier frequency information and the absolute offset value.

[0258] In some embodiments, the frequency domain offset value includes a relative offset value; the frequency domain information of the uplink signal sent by the terminal is determined based on the carrier frequency information, the absolute offset value and the relative offset value, and the absolute offset value is determined based on the frequency domain adjustment value determined last time.

[0259] In some embodiments, the first indication information is based on at least one of the following bearers: system information, RRC signaling, MAC CE, physical layer signaling, or DCI.

[0260] In some embodiments, second indication information is sent; the second indication information includes: the terminal has the ability to determine frequency domain information based on the first indication information.

[0261] In some embodiments, when it is determined that the global navigation satellite system GNSS of the terminal is in an unavailable state, the terminal obtains first indication information sent by a network device; and based on the first indication information, determines frequency domain information of the uplink signal sent by the terminal.

[0262] In some embodiments, when it is determined that the uplink synchronization error of the terminal exceeds the error range, the terminal obtains first indication information sent by the network device; based on the first indication information, the frequency domain information of the uplink signal sent by the terminal is determined.

[0263] The communication method involved in the embodiments of the present disclosure may include at least one of steps S3201 and S3202. For example, step S3201 may be implemented as an independent embodiment, step S3202 may be implemented as an independent embodiment, step S3201 may be implemented as an independent embodiment, and step S3201 + step S3202 may be implemented as independent embodiments, but the present invention is not limited thereto.

[0264] In some embodiments, steps S3201 and S3202 may be executed in an interchanged order or simultaneously.

[0265] In some embodiments, step S3202 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0266] In some embodiments, step S3201 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0267] 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, and the method includes:

[0268] Step S4101: Send first indication information.

[0269] For optional implementations of step S4101, please refer to the optional implementations of step S2101 in Figure 2A, step S3101 in Figure 3A, step S3101 in Figure 3B, and other related parts of the embodiments involved in Figures 2A, 2B, 2C, 3A and 3B, which will not be repeated here.

[0270] Step S4102: Obtain second indication information.

[0271] The optional implementation of step S4102 can be found in the optional implementation of step S2102 in Figure 2A, step S3102 in Figure 3A, step S3201 in Figure 3B, and other related parts in the embodiments involved in Figures 2A, 2B, 2C, 3A and 3B, which will not be repeated here.

[0272] The communication method involved in the embodiments of the present disclosure may include at least one of steps S4101 and S4102. For example, step S4101 may be implemented as an independent embodiment, step S4102 may be implemented as an independent embodiment, step S4101 may be implemented as an independent embodiment, and step S4101 + step S4102 may be implemented as independent embodiments, but the present invention is not limited thereto.

[0273] In some embodiments, steps S4101 and S4102 may be executed in an interchanged order or simultaneously.

[0274] In some embodiments, step S4102 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0275] In some embodiments, step S4101 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0276] FIG4B is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG4B , the embodiment of the present disclosure relates to a communication method, and the method includes:

[0277] Step S4201: Send first indication information.

[0278] For the optional implementation of step S4201, please refer to the optional implementation of step S2101 in Figure 2A, step S3101 and step S3102 in Figure 3A, step S3201 in Figure 3B, and step S4101 and step S4102 in Figure 4A. Other related parts of the embodiments involved in Figures 2A, 2B, 2C, 3A, 3B, 4A and 4B will not be repeated here.

[0279] In some embodiments, the first indication information is used to instruct the terminal to determine frequency domain information of the uplink signal to be sent based on the first indication information.

[0280] In some embodiments, the first indication information includes a frequency offset value, and the frequency domain information is determined based on the frequency domain offset value.

[0281] In some embodiments, the first indication information is used to indicate a Doppler frequency domain offset value of the target link; the frequency domain offset value is the Doppler frequency domain offset value of the target link.

[0282] In some embodiments, the first indication information is used to indicate information about the Doppler frequency domain offset rate of the target link; and the frequency domain offset value is determined based on the Doppler frequency domain offset rate of the target link and the transmission delay of the target link.

[0283] In some embodiments, the target link includes at least one of the following: a target link between the terminal and the network device; a target link between the terminal and an uplink synchronization reference point.

[0284] In some embodiments, the frequency domain offset value includes an absolute offset value; and the frequency domain information of the uplink signal sent by the terminal is determined based on the carrier frequency information and the absolute offset value.

[0285] In some embodiments, the frequency domain offset value includes a relative offset value; the frequency domain information of the uplink signal sent by the terminal is determined based on the carrier frequency information, the absolute offset value and the relative offset value, and the absolute offset value is determined based on the last determined frequency domain adjustment value.

[0286] In some embodiments, the first indication information is based on at least one of the following bearers: system information, RRC signaling, MAC CE, physical layer signaling, or DCI.

[0287] In some embodiments, when the global navigation satellite system GNSS of the terminal is in an unavailable state, the network device sends first indication information to the terminal.

[0288] In some embodiments, when the uplink synchronization error of the terminal exceeds the error range, the network device sends first indication information to the terminal.

[0289] In some embodiments, the uplink synchronization error of the terminal exceeds the error range.

[0290] Figure 5 is an interactive diagram of a communication method according to an embodiment of the present disclosure. As shown in Figure 5, the embodiment of the present disclosure relates to a communication method, which includes:

[0291] Step S5101: The network device 102 sends first indication information to the terminal 101.

[0292] For the optional implementation of step S5101, please refer to the optional implementation of step S2101 in Figure 2A, step S3101, step S3102, step S3201 in Figure 3A, and step S4101, step S4102 and step S4201 in Figure 4B. Other related parts of the embodiments involved in Figures 2A, 2B, 2C, 3A, 3B, 4A and 4B will not be repeated here.

[0293] Step S5102: The terminal 101 determines the frequency domain information of the uplink signal based on the first indication information.

[0294] The optional implementation of step S5102 can be found in the optional implementation of step S2103 in Figure 2A, step S3103 in Figure 3A, step S3202 in Figure 3B, Figures 2A, 2B, 2C, 3A, 3B, and other related parts in the embodiments involved, which will not be repeated here.

[0295] In some embodiments, the above method may include the method described in the above embodiments on the core network device side, the first network element side, the second network element side, etc., which will not be repeated here.

[0296] The embodiments of the present disclosure propose a communication method, which is applied to a satellite communication system, to achieve uplink frequency domain synchronization when the GNSS of a terminal is temporarily unavailable or there is an error in the GNSS, thereby ensuring that the terminal maintains uplink frequency domain synchronization with the network when the GNSS is temporarily unavailable.

[0297] In some embodiments, the terminal reports capability indication information indicating the ability to maintain its uplink frequency domain synchronization based on closed-loop command adjustment when GNSS is unavailable.

[0298] In some embodiments, the network device maintains uplink frequency domain synchronization of the terminal through adjustment commands based on capability indication information reported by the terminal.

[0299] Optionally, the capability indication information is used to indicate the terminal's ability to maintain its uplink frequency domain synchronization based on closed-loop adjustment commands when GNSS is unavailable. When the network device determines that the terminal's GNSS may be unavailable, it may use adjustment commands to maintain the terminal's uplink frequency domain synchronization.

[0300] In some embodiments, when the capability indication information reported by the terminal indicates that the terminal is unable to maintain its uplink synchronization based on the closed-loop adjustment command when GNSS is unavailable, the network device may trigger the terminal to re-perform GNSS measurement upon determining that the GNSS of the terminal may be unavailable. If the GNSS measurement is still unsuccessful, the terminal needs to enter the RRC IDLE state.

[0301] In some embodiments, the communication method includes determining that an uplink synchronization failure of a terminal exceeds a predetermined range.

[0302] Illustratively, the network device may determine whether the uplink synchronization error of the terminal exceeds a predetermined range based on the arrival of the uplink signal. The uplink synchronization error may be caused by a synchronization error in the time domain or the frequency domain.

[0303] In some embodiments, the communication method includes an uplink frequency domain synchronization mechanism.

[0304] In some embodiments, the uplink synchronization mechanism includes: the terminal receives uplink frequency domain adjustment indication information sent by the network device to determine the frequency information of its uplink signal transmission.

[0305] Exemplarily, the uplink frequency domain adjustment command indicates indication information of the Doppler frequency domain offset rate of the target link.

[0306] Exemplarily, the target link may be a communication link from the terminal to a satellite, from the terminal to an uplink synchronization reference point, or from the terminal to a base station.

[0307] Exemplarily, the adjustment command may be carried via high-layer signaling such as system information, RRC signaling, MAC CE, or physical layer signaling.

[0308] Optionally, the terminal determines offset value information for sending an uplink signal on the target link based on the Doppler frequency domain offset rate and the propagation delay of the target link.

[0309] In some embodiments, the uplink synchronization mechanism further includes: the frequency domain adjustment command indicates an adjustment command for a Doppler frequency domain offset value of the target link, and the terminal directly determines frequency information for uplink signal transmission based on the offset value.

[0310] Optionally, the offset value may be an absolute offset value or a relative offset value.

[0311] Exemplarily, when the offset value is an absolute offset value, the transmission frequency of the uplink signal of the terminal can be determined by carrier frequency information+absolute offset value.

[0312] Exemplarily, when the offset value is a relative offset value, the sending frequency of the uplink signal can be determined by the carrier frequency information + absolute offset value, and the absolute offset value is determined by the accumulation of the frequency domain adjustment value determined by the last uplink frequency domain synchronization command plus the relative offset value notified this time.

[0313] It can be understood that the embodiments of the present disclosure can ensure that the terminal maintains uplink frequency domain synchronization with the network when the GNSS is temporarily unavailable.

[0314] In the embodiments of the present disclosure, some or all of the steps and their optional implementations may be arbitrarily combined with some or all of the steps in other embodiments, or may be arbitrarily combined with the optional implementations of other embodiments.

[0315] The embodiments of the present disclosure further provide an apparatus for implementing any of the above methods. For example, an apparatus is provided, comprising units or modules for implementing each step performed by a terminal in any of the above methods. For another example, another apparatus is provided, comprising units or modules for implementing each step performed by a network device (e.g., an access network device, a core network function node, a core network device, etc.) in any of the above methods.

[0316] 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.

[0317] In the embodiments of the present disclosure, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction reading and execution capabilities, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationship of the hardware circuit. The logical relationship of the above-mentioned hardware circuit is fixed or reconfigurable. For example, the processor is a hardware circuit implemented by 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.

[0318] Figure 6A is a structural diagram of the terminal proposed in an embodiment of the present disclosure. As shown in Figure 6A, the terminal 6100 may include: at least one of a transceiver module 6101, a processing module 6102, etc. In some embodiments, the transceiver module 6101 is used to obtain the first indication information sent by the network device. Optionally, the transceiver module 6101 is used to execute at least one of the communication steps such as sending and / or receiving (for example, step S2101, step S2102, but not limited to this) executed by the terminal 101 in any of the above methods, which will not be repeated here. In some embodiments, the processing module 6102 is used to determine the frequency domain information of the uplink signal sent by the terminal based on the first indication information. Optionally, the processing module 6102 is used to execute at least one of the other steps (for example, step S2103, but not limited to this) executed by the terminal 101 in any of the above methods, which will not be repeated here.

[0319] In some embodiments, the processing module determines the frequency domain information of the uplink signal sent by the terminal based on the first indication information in the following manner: based on the first indication information, determines the frequency domain offset value used to adjust the frequency domain information of the uplink signal; based on the frequency domain offset value, determines the frequency domain information of the uplink signal sent by the terminal.

[0320] In some embodiments, when the first indication information is used to indicate the Doppler frequency domain offset value of the target link, the processing module determines the frequency domain offset value for adjusting the frequency domain position of the uplink signal based on the first indication information in the following manner: determining the Doppler frequency domain offset value of the target link as the frequency domain offset value for adjusting the frequency domain position of the uplink signal,

[0321] In some embodiments, when the first indication information is used to indicate the Doppler frequency domain offset rate of the target link, the processing module determines the frequency domain offset value based on the first indication information in the following manner: based on the Doppler frequency domain offset rate of the target link and the transmission delay of the target link, determine the frequency domain offset value used to adjust the frequency domain position of the uplink signal.

[0322] In some embodiments, the target link includes at least one of the following: a target link between the terminal and the network device; a target link between the terminal and an uplink synchronization reference point.

[0323] In some embodiments, when the frequency domain offset value includes an absolute offset value, the processing module determines the frequency domain information for sending the uplink signal based on the carrier frequency information and the absolute offset value.

[0324] In some embodiments, when the frequency domain offset value includes a relative offset value, the processing module determines the frequency domain information of the uplink signal based on the carrier frequency information, the absolute offset value and the relative offset value, and the absolute offset value is determined based on the frequency domain adjustment value determined last time.

[0325] In some embodiments, the first indication information is based on at least one of the following bearers: system information, radio resource control RRC signaling, media access layer control element MAC CE, physical layer signaling or downlink control information DCI.

[0326] In some embodiments, the transceiver module 6101 is further used to send second indication information; wherein the second indication information is used to indicate that the terminal has the ability to determine frequency domain information based on the first indication information.

[0327] In some embodiments, the transceiver module 6101 is further configured to obtain first indication information sent by a network device when the global navigation satellite system GNSS of the terminal is in an unavailable state.

[0328] In some embodiments, the processing module is further used to determine the status of the terminal's global navigation satellite system GNSS, and when the status of the terminal's global navigation satellite system GNSS is unavailable, determine the frequency domain information of the terminal sending the uplink signal based on the first indication information.

[0329] In some embodiments, the transceiver module 6101 is further configured to obtain first indication information sent by a network device when it is determined that the uplink synchronization error of the terminal exceeds an error range.

[0330] In some embodiments, the processing module is further configured to determine an uplink synchronization error of the terminal, and determine frequency domain information of the uplink signal sent by the terminal based on the first indication information when the uplink synchronization error of the terminal exceeds an error range.

[0331] FIG6B is a schematic diagram of the structure of a network device proposed in an embodiment of the present disclosure. As shown in FIG6B , the network device 6200 may include: a transceiver module 6201. In some embodiments, the transceiver module 6101 is used to send a first indication message to the terminal, wherein the first indication message is used to instruct the terminal to determine the frequency domain information of the uplink signal to be sent based on the first indication message. Optionally, the transceiver module 6201 is used to perform at least one of the communication steps such as sending and / or receiving (for example, step S2101, step S2102, but not limited thereto) performed by the network device 102 in any of the above methods, which will not be repeated here.

[0332] In some embodiments, the first indication information includes a frequency offset value, and the frequency domain information is determined based on the frequency domain offset value.

[0333] In some embodiments, the first indication information is used to indicate a Doppler frequency domain offset value of the target link; the frequency domain offset value is the Doppler frequency domain offset value of the target link.

[0334] In some embodiments, the first indication information is used to indicate information about the Doppler frequency domain offset rate of the target link; and the frequency domain offset value is determined based on the Doppler frequency domain offset rate of the target link and the transmission delay of the target link.

[0335] In some embodiments, the target link includes at least one of the following: a target link between the terminal and the network device; a target link between the terminal and an uplink synchronization reference point.

[0336] In some embodiments, the frequency domain offset value includes an absolute offset value; and the frequency domain information of the uplink signal sent by the terminal is determined based on the carrier frequency information and the absolute offset value.

[0337] In some embodiments, the frequency domain offset value includes a relative offset value; the frequency domain information of the uplink signal sent by the terminal is determined based on the carrier frequency information, the absolute offset value and the relative offset value, and the absolute offset value is determined based on the last determined frequency domain adjustment value.

[0338] In some embodiments, the first indication information is based on at least one of the following bearers: system information, radio resource control RRC signaling, media access layer control element MAC CE, physical layer signaling, or downlink control information DCI.

[0339] In some embodiments, the transceiver module 6201 is further used to: obtain second indication information; the second indication information is used to indicate that the terminal has the ability to determine the frequency domain information based on the first indication information.

[0340] In some embodiments, the transceiver module 6201 is further configured to: send first indication information to the terminal when the global navigation satellite system GNSS of the terminal is in an unavailable state.

[0341] In some embodiments, the transceiver module 6201 is further configured to: send first indication information to the terminal when an uplink synchronization error of the terminal exceeds an error range.

[0342] In some embodiments, the transceiver module may include a transmitting module and / or a receiving module, and the transmitting module and the receiving module may be separate or integrated. Optionally, the transceiver module may be interchangeable with the transceiver.

[0343] In some embodiments, the processing module can be a single module or can include multiple submodules. Optionally, the multiple submodules respectively execute all or part of the steps required to be executed by the processing module. Optionally, the processing module can be interchangeable with the processor.

[0344] 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.

[0345] 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 the communication protocol and communication data, and the central processing unit can be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute programs, and process program data. Optionally, the communication device 7100 is used to perform any of the above methods. Optionally, one or more processors 7101 are used to call instructions to enable the communication device 7100 to perform any of the above methods.

[0346] In some embodiments, the communication device 7100 further includes one or more transceivers 7102. When the communication device 7100 includes one or more transceivers 7102, the transceiver 7102 performs at least one of the communication steps such as sending and / or receiving in the above method (for example, step S2102 and step S2103, but not limited thereto), and the processor 7101 performs at least one of the other steps (for example, step S2101, but not limited thereto). In an optional embodiment, the transceiver may include a receiver and / or a transmitter, and the receiver and transmitter may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, transceiver circuit, interface circuit, and interface may be interchangeable, the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be interchangeable, and the terms receiver, receiving unit, receiver, and receiving circuit may be interchangeable.

[0347] In some embodiments, the communication device 7100 further includes one or more memories 7103 for storing data. Alternatively, all or part of the memories 7103 may be located outside the communication device 7100. In alternative embodiments, the communication device 7100 may include one or more interface circuits 7104. Optionally, the interface circuits 7104 are connected to the memories 7103 and may be configured to receive data from the memories 7103 or other devices, or to send data to the memories 7103 or other devices. For example, the interface circuits 7104 may read data stored in the memories 7103 and send the data to the processor 7101.

[0348] The communication device 7100 described in the above embodiments 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 to 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.

[0349] 7B is a schematic diagram of the structure of a chip 7200 proposed in an embodiment of the present disclosure. If the communication device 7100 can be a chip or a chip system, please refer to the schematic diagram of the structure of the chip 7200 shown in FIG7B , but the present disclosure is not limited thereto.

[0350] The chip 7200 includes one or more processors 7201. The chip 7200 is configured to execute any of the above methods.

[0351] In some embodiments, chip 7200 further includes one or more interface circuits 7202. Alternatively, terms such as interface circuit, interface, and transceiver pins may be used interchangeably. In some embodiments, chip 7200 further includes one or more memories 7203 for storing data. Alternatively, all or part of memory 7203 may be located external to chip 7200. Optionally, interface circuit 7202 is connected to memory 7203 and may be used to receive data from memory 7203 or other devices, or may be used to send data to memory 7203 or other devices. For example, interface circuit 7202 may read data stored in memory 7203 and send the data to processor 7201.

[0352] In some embodiments, the interface circuit 7202 performs at least one of the communication steps (e.g., step S2102 and step S2103, but not limited thereto) of the aforementioned method. The interface circuit 7202 performing the communication steps (e.g., step S2102 and step S2103, but not limited thereto) of the aforementioned method means, for example, that the interface circuit 7202 performs data exchange between the processor 7201, chip 7200, memory 7203, or a transceiver device. In some embodiments, the processor 7201 performs at least one of the other steps (e.g., step S2101, but not limited thereto).

[0353] The modules and / or devices described in various embodiments, such as virtual devices, physical devices, and chips, can be arbitrarily combined or separated according to circumstances. Optionally, some or all steps can also be performed collaboratively by multiple modules and / or devices, which is not limited here.

[0354] 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.

[0355] 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.

[0356] 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.

Claims

1. A communication method, characterized in that, The method includes: The terminal obtains first indication information sent by a network device; Based on the first indication information, determine the frequency-domain information of the uplink signal sent by the terminal.

2. The method according to claim 1, wherein The determining, based on the first indication information, the frequency-domain information of the uplink signal sent by the terminal includes: Based on the first indication information, determine a frequency-domain offset value for adjusting the frequency-domain information of the uplink signal; Based on the frequency-domain offset value, determine the frequency-domain information of the uplink signal sent by the terminal.

3. The method according to claim 1 or 2, characterized in that, The first indication information is used to indicate the Doppler frequency-domain offset value of a target link; Based on the first indication information, the determining of the frequency-domain offset value for adjusting the frequency-domain position of the uplink signal includes: Determine the Doppler frequency-domain offset value of the target link as the frequency-domain offset value for adjusting the frequency-domain position of the uplink signal.

4. The method according to claim 2, characterized in that, The first indication information is used to indicate information about the Doppler frequency-domain offset rate of a target link; Based on the first indication information, the determining of the frequency-domain offset value includes: Based on the Doppler frequency-domain offset rate of the target link and the transmission delay of the target link, determine the frequency-domain offset value for adjusting the frequency-domain position of the uplink signal.

5. The method according to claim 3 or 4, characterized in that, The target link includes at least one of the following: The target link between the terminal and the network device; The target link between the terminal and the uplink synchronization reference point.

6. The method according to any one of claims 2 to 5, characterized in that, The frequency-domain offset value includes an absolute offset value; The frequency-domain information of the uplink signal sent by the terminal is determined based on the carrier frequency information and the absolute offset value.

7. The method according to any one of claims 2 to 5, characterized in that The frequency-domain offset value includes a relative offset value; The frequency-domain information of the uplink signal sent by the terminal is determined based on the carrier frequency information, the absolute offset value, and the relative offset value, and the absolute offset value is determined based on the previously determined frequency-domain adjustment value.

8. The method according to any one of claims 1 to 4, characterized in that, The first indication information is carried based on at least one of the following: System information, Radio Resource Control (RRC) signaling, Medium Access Control Control Element (MAC CE), Physical layer signaling, or Downlink Control Information (DCI).

9. The method according to claim 1, characterized in that The method further includes: sending second indication information; The second indication information is used to indicate that the terminal has the ability to determine the frequency-domain information based on the first indication information.

10. The method according to claim 1, wherein In a case where it is determined that the Global Navigation Satellite System (GNSS) of the terminal is in an unavailable state, the terminal determines the frequency-domain information of the uplink signal sent by the terminal based on the first indication information sent by the network device.

11. The method according to claim 1, characterized in that, In a case where it is determined that the uplink synchronization error of the terminal exceeds the error range, the terminal determines the frequency-domain information of the uplink signal sent by the terminal based on the first indication information sent by the network device.

12. A communication method, characterized in that, The method includes: The network device sends first indication information to the terminal; Wherein, the first indication information is used to indicate the terminal to determine the frequency-domain information of the uplink signal sent.

13. The method according to claim 12, characterized in that, The first indication information includes a frequency offset value, and the frequency-domain information is determined based on the frequency offset value.

14. The method according to claim 12, wherein The first indication information is used to indicate the Doppler frequency-domain offset value of a target link; The frequency-domain offset value is the Doppler frequency-domain offset value of the target link.

15. The method according to claim 13, wherein The first indication information is used to indicate information about the Doppler frequency-domain offset rate of a target link; The frequency domain offset value is determined based on the Doppler frequency domain offset rate of the target link and the transmission delay of the target link.

16. The method according to claim 14 or 15, characterized in that The target link includes at least one of the following: The target link between the terminal and the network device; The target link between the terminal and the uplink synchronization reference point.

17. The method according to any one of claims 12 to 16, characterized in that The frequency domain offset value includes an absolute offset value; The frequency domain information of the uplink signal transmitted by the terminal is determined based on the carrier frequency information and the absolute offset value.

18. The method according to any one of claims 12 to 16, characterized in that The frequency domain offset value includes a relative offset value; The frequency domain information of the uplink signal transmitted by the terminal is determined based on the carrier frequency information, the absolute offset value, and the relative offset value, and the absolute offset value is determined based on the previously determined frequency domain adjustment value.

19. The method according to any one of claims 12 to 15, characterized in that The first indication information is carried based on at least one of the following: System information, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) Control Element (CE), Physical layer signaling, or Downlink Control Information (DCI).

20. The method according to claim 12, wherein The method further includes: obtaining second indication information; The second indication information is used to indicate that the terminal has the ability to determine the frequency domain information based on the first indication information.

21. The method according to claim 12, wherein In a case where the Global Navigation Satellite System (GNSS) of the terminal is in an unavailable state, the network device sends the first indication information to the terminal.

22. The method according to claim 12, wherein In a case where the uplink synchronization error of the terminal exceeds the error range, the network device sends the first indication information to the terminal.

23. A communication method, characterized in that, The method includes: The network device sends the first indication information to the terminal; The terminal determines the frequency domain information of the uplink signal transmitted by the terminal based on the first indication information.

24. A terminal, characterized in that, Includes: A transceiver module, configured to obtain the first indication information sent by the network device; A processing module, configured to determine the frequency domain information of the uplink signal transmitted by the terminal based on the first indication information.

25. A network device, characterized in that, Includes: A transceiver module, configured to send the first indication information to the terminal; Wherein, the first indication information is used to indicate that the terminal determines the frequency domain information of the uplink signal transmitted based on the first indication information.

26. A terminal, characterized in that, Includes: One or more processors; Wherein, the processor is configured to execute the communication method according to any one of claims 1 to 11.

27. A network device, characterized in that, Includes: One or more processors; Wherein, the processor is configured to execute the communication method according to any one of claims 12 to 22.

28. A communication system, characterized in that, Includes a terminal and a network device, wherein the terminal is configured to implement the communication method according to any one of claims 1 to 11, and the network device is configured to implement the communication method according to any one of claims 12 to 22.

29. A storage medium, the storage medium stores instructions, characterized in that, When the instruction runs on the communication device, the communication device is caused to execute the communication method according to any one of claims 1 to 11 or 12 to 22.

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