Method for measurement relaxation in non-terrestrial network, communication apparatus, and storage medium

Abstract

The present application relates to the field of communications, and provides a method for measurement relaxation in an NTN, a communication apparatus, and a storage medium. The method comprises: acquiring measurement relaxation criteria, wherein the measurement relaxation criteria are used for indicating a reference position, and the reference position is associated with an NTN cell to be measured; and on the basis of the measurement relaxation criteria, performing measurement relaxation on one or more of the following: RLM, BFD, or RRM. In an NTN, an RLM, BFD or RRM measurement relaxation mechanism based on a reference position of an NTN cell to be measured not only reduces the power consumption of a terminal, but also better adapts to the feature that the difference in air‑interface signal quality between the cell center and the cell edge in the NTN is not obvious, thereby achieving more effective measurements of RLM, BFD, or RRM.

Description

Method, communication apparatus and storage medium for measurement relaxation in non-terrestrial network

[0001] The application claims priority to the Chinese patent application No. 202411092809.1, filed on August 7, 2024, and entitled "Method, communication apparatus and storage medium for measurement relaxation in non-terrestrial network", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of communication, in particular to a method, a communication apparatus and a storage medium for measurement relaxation in a non-terrestrial network (NTN). BACKGROUND

[0003] The NTN is a next generation-radio access network (NG-RAN) composed of next generation node B (gNB), which provides non-terrestrial new radio (NR) access to terminals through NTN payloads on airborne or spaceborne NTN carriers and NTN gateways.

[0004] In the NTN, a terminal performs radio link monitoring (RLM), beam failure detection (BFD) or radio resource management (RRM) measurement. However, when performing RLM, BFD or RRM measurement, the power consumption of the terminal is relatively large. SUMMARY

[0005] The present application provides a method, a communication apparatus and a storage medium for measurement relaxation in an NTN, so as to reduce the power consumption of the terminal.

[0006] In a first aspect, a method for measurement relaxation in an NTN is provided, which can be executed by a communication apparatus. The communication apparatus can be a terminal, or a component (such as a chip, a chip system, etc.) configured in the terminal, or a logic module or software capable of realizing all or part of the functions of the terminal, and the present application does not make any limitation in this regard.

[0007] Exemplarily, the method comprises: obtaining a measurement relaxation criterion, the measurement relaxation criterion being used to indicate a reference position, the reference position being associated with an NTN cell to be measured; and based on the measurement relaxation criterion, performing measurement relaxation on one or more of the following: RLM, BFD or RRM.

[0008] Based on the above technical solution, in the NTN, the measurement relaxation mechanism of RLM, BFD or RRM based on the reference position of the to-be-measured NTN cell can not only reduce the power consumption of the terminal, but also better adapt to the feature that the difference between the air interface signal quality at the cell center and the cell edge is not obvious in the NTN, and can more effectively perform the measurement of RLM, BFD or RRM.

[0009] In combination with the first aspect, in some possible implementation manners of the first aspect, the terminal is in a connected state, the to-be-measured NTN cell includes an NTN serving cell of the terminal and / or a neighbor cell of the NTN serving cell, and based on the measurement relaxation standard, measurement relaxation of one or more of RLM, BFD or RRM is performed, including: based on the measurement relaxation standard, measurement relaxation of one or more of RLM, BFD or RRM of the NTN serving cell is performed, and / or measurement relaxation of RRM of the neighbor cell is performed.

[0010] Optionally, the measurement relaxation standard further indicates a first distance threshold, the first distance threshold being associated with the NTN serving cell; and the measurement relaxation of one or more of RLM, BFD or RRM of the NTN serving cell and / or the measurement relaxation of RRM of the neighbor cell based on the measurement relaxation standard includes: in a case where a distance between the terminal and the NTN serving cell is less than or equal to the first distance threshold, the measurement relaxation of one or more of RLM, BFD or RRM of the NTN serving cell and / or the measurement relaxation of RRM of the neighbor cell is performed; wherein the distance between the terminal and the NTN serving cell is determined based on the reference position.

[0011] Optionally, the measurement relaxation standard further indicates a first distance threshold, ephemeris information of a serving satellite and a satellite epoch time, the first distance threshold and the serving satellite being associated with the NTN serving cell; and the measurement relaxation of one or more of RLM, BFD or RRM of the NTN serving cell and / or the measurement relaxation of RRM of the neighbor cell based on the measurement relaxation standard includes: in a case where a distance between the terminal and the NTN serving cell is less than or equal to the first distance threshold, the measurement relaxation of one or more of RLM, BFD or RRM of the NTN serving cell and / or the measurement relaxation of RRM of the neighbor cell is performed; wherein the distance between the terminal and the NTN serving cell is determined based on the reference position, the satellite epoch time and the ephemeris information.

[0012] Optionally, the reference position comprises a reference position of the NTN serving cell and a reference position of at least one first neighbor cell, the first neighbor cell being any neighbor cell of the NTN serving cell, the measurement relaxation parameter is further used to indicate a first distance threshold and at least one second distance threshold, the first distance threshold being associated with the NTN serving cell, the at least one second distance threshold being associated with at least one of the first neighbor cell; and the performing, based on the measurement relaxation criterion, measurement relaxation of one or more of RLM, BFD or RRM on the NTN serving cell and / or measurement relaxation of RRM on the neighbor cell comprises: performing measurement relaxation of one or more of RLM, BFD or RRM on the NTN serving cell and / or measurement relaxation of RRM on the neighbor cell in a case that a distance between the terminal and the NTN serving cell is less than or equal to the first distance threshold and a distance between the terminal and the first neighbor cell is greater than or equal to the second distance threshold; wherein the distance between the terminal and the NTN serving cell is determined based on the reference position of the NTN serving cell, and the distance between the terminal and the first neighbor cell is determined based on the reference position of the first neighbor cell.

[0013] Optionally, the reference position comprises a reference position of the NTN serving cell and a reference position of at least one first neighbor cell, the first neighbor cell being any neighbor cell of the NTN serving cell; the measurement relaxation parameter is further used to indicate a first distance threshold, ephemeris information of a serving satellite and a satellite time of week, and ephemeris information of at least one neighbor satellite of the serving satellite and at least one second distance threshold, the first distance threshold being associated with the NTN serving cell and the serving satellite, the at least one second distance threshold being associated with at least one of the first neighbor cell; and the performing, based on the measurement relaxation criterion, measurement relaxation of one or more of RLM, BFD or RRM on the NTN serving cell and / or measurement relaxation of RRM on the neighbor cell comprises: performing measurement relaxation of one or more of RLM, BFD or RRM on the NTN serving cell and / or measurement relaxation of RRM on the neighbor cell in a case that a distance between the terminal and the NTN serving cell is less than or equal to the first distance threshold and a distance between the terminal and the first neighbor cell is greater than or equal to the second distance threshold; wherein the distance between the terminal and the NTN serving cell is determined based on the reference position of the NTN serving cell, the satellite time of week and the ephemeris information of the serving satellite, and the distance between the terminal and the first neighbor cell is determined based on the reference position of the first neighbor cell, the satellite time of week and the ephemeris information of the neighbor satellite.

[0014] Optionally, the measurement relaxation criterion is further used to indicate a distance change threshold and a time duration threshold, the distance change threshold and the time duration threshold being associated with the NTN serving cell; and the measurement relaxation based on the measurement relaxation criterion comprises: performing measurement relaxation of one or more of RLM, BFD or RRM on the NTN serving cell and / or performing measurement relaxation of RRM on the neighbor cell, including: performing measurement relaxation of one or more of RLM, BFD or RRM on the NTN serving cell and / or performing measurement relaxation of RRM on the neighbor cell in a case that a change amount of a distance between the terminal and the NTN serving cell is less than or equal to the distance change threshold within the time duration threshold, wherein the distance between the terminal and the NTN serving cell is determined based on the reference position.

[0015] Optionally, the measurement relaxation criterion is further used to indicate ephemeris information of a serving satellite, a satellite time of week, a distance change threshold and a time duration threshold, the serving satellite, the distance change threshold and the time duration threshold being associated with the NTN serving cell; and the measurement relaxation based on the measurement relaxation criterion comprises: performing measurement relaxation of one or more of RLM, BFD or RRM on the NTN serving cell and / or performing measurement relaxation of RRM on the neighbor cell, including: performing measurement relaxation of one or more of RLM, BFD or RRM on the NTN serving cell and / or performing measurement relaxation of RRM on the neighbor cell in a case that a change amount of a distance between the terminal and the NTN serving cell is less than or equal to the distance change threshold within the time duration threshold, wherein the distance between the terminal and the NTN serving cell is determined based on the reference position, the satellite time of week and the ephemeris information.

[0016] In a possible implementation form of the first aspect, the terminal is in an idle state or an inactive state, the NTN cell to be measured comprises an NTN serving cell in which the terminal is located and / or a neighbor cell of the NTN serving cell, and the measurement relaxation based on the measurement relaxation criterion comprises: performing measurement relaxation of RRM on the neighbor cell based on the measurement relaxation criterion.

[0017] Optionally, the measurement relaxation criterion is further used to indicate a third distance threshold, the third distance threshold being associated with the NTN serving cell; and the measurement relaxation based on the measurement relaxation criterion comprises: performing measurement relaxation of RRM on the neighbor cell in a case that a distance between the terminal and the NTN serving cell is less than or equal to the third distance threshold, wherein the distance between the terminal and the NTN serving cell is determined based on the reference position.

[0018] Optionally, the measurement relaxation criterion further indicates a third distance threshold, ephemeris information of a serving satellite, and a satellite time of week, the third distance threshold being associated with the NTN serving cell and the serving satellite; and the performing the measurement relaxation of the RRM for the neighbor cell based on the measurement relaxation criterion comprises: performing the measurement relaxation of the RRM for the neighbor cell in a case that a distance between the terminal and the NTN serving cell is less than or equal to the third distance threshold, wherein the distance between the terminal and the NTN serving cell is determined based on the reference location, the satellite time of week, and the ephemeris information.

[0019] Optionally, the reference location comprises a reference location of the NTN serving cell and a reference location of at least one first neighbor cell, the first neighbor cell being any neighbor cell of the NTN serving cell; the measurement relaxation parameter further indicates a third distance threshold and at least one fourth distance threshold, the third distance threshold being associated with the NTN serving cell, and the at least one fourth distance threshold being associated with the at least one first neighbor cell; and the performing the measurement relaxation of the RRM for the neighbor cell based on the measurement relaxation criterion comprises: performing the measurement relaxation of the RRM for the neighbor cell in a case that the distance between the terminal and the NTN serving cell is less than or equal to the third distance threshold, and the distance between the terminal and the first neighbor cell is greater than or equal to the fourth distance threshold, wherein the distance between the terminal and the NTN serving cell is determined based on the reference location of the NTN serving cell, and the distance between the terminal and the first neighbor cell is determined based on the reference location of the first neighbor cell.

[0020] Optionally, the reference location comprises a reference location of the NTN serving cell and a reference location of at least one first neighbor cell, the first neighbor cell being any neighbor cell of the NTN serving cell; the measurement relaxation parameter further indicates a third distance threshold, ephemeris information of a serving satellite, and a satellite time of week, and ephemeris information of at least one neighbor satellite of the serving satellite and at least one fourth distance threshold, the third distance threshold being associated with the NTN serving cell and the serving satellite, and the at least one fourth distance threshold being associated with the at least one first neighbor cell; and the performing the measurement relaxation of the RRM for the neighbor cell based on the measurement relaxation criterion comprises: performing the measurement relaxation of the RRM for the neighbor cell in a case that the distance between the terminal and the NTN serving cell is less than or equal to the third distance threshold, and the distance between the terminal and the first neighbor cell is greater than or equal to the fourth distance threshold, wherein the distance between the terminal and the NTN serving cell is determined based on the reference location of the NTN serving cell, the satellite time of week, and the ephemeris information of the serving satellite, and the distance between the terminal and the first neighbor cell is determined based on the reference location of the first neighbor cell, the satellite time of week, and the ephemeris information of the neighbor satellite.

[0021] Optionally, the measurement relaxation criterion is further used to indicate a distance change threshold and a time length threshold, the distance change threshold and the time length threshold being associated with the NTN serving cell; and the performing of the measurement relaxation of the RRM of the neighbor cell based on the measurement relaxation criterion comprises: performing the measurement relaxation of the RRM of the neighbor cell in a case that a change amount of a distance between the terminal and the NTN serving cell is less than or equal to the distance change threshold within the time length threshold; wherein the distance between the terminal and the NTN serving cell is determined based on the reference position.

[0022] Optionally, the measurement relaxation parameter is further used to indicate ephemeris information of a serving satellite, a satellite time of week, a distance change threshold and a time length threshold, the serving satellite, the distance change threshold and the time length threshold being associated with the NTN serving cell; and the performing of the measurement relaxation of the RRM of the neighbor cell based on the measurement relaxation criterion comprises: performing the measurement relaxation of the RRM of the neighbor cell in a case that a change amount of a distance between the terminal and the NTN serving cell is less than or equal to the distance change threshold within the time length threshold; wherein the distance between the terminal and the NTN serving cell is determined based on the reference position, the satellite time of week and the ephemeris information.

[0023] With reference to the first aspect, in some possible implementation manners of the first aspect, the measurement relaxation criterion is further used to indicate first time information, the first time information being used to indicate a time of performing the measurement relaxation.

[0024] Optionally, the first time information comprises a first time point, the first time point being used to indicate that the measurement relaxation is performed before the first time point.

[0025] Optionally, the first time information comprises a first time length and a second time point, the first time length and the second time point being used to indicate that the measurement relaxation is performed within the first time length starting from the second time point.

[0026] Optionally, the first time information comprises a third time point and a fourth time point, the third time point being earlier than the fourth time point, the third time point and the fourth time point being used to indicate that the measurement relaxation is performed between the third time point and the fourth time point.

[0027] By combining the first time information, the terminal can determine whether the measurement relaxation criterion is met within a specific time according to the time when the terminal is served by the satellite, and determine the time period in which the measurement relaxation is performed, which not only reduces the power consumption of the terminal, but also avoids starting to determine whether the measurement relaxation criterion is met from the start time when the terminal is served by the satellite, and improves the effectiveness of the measurement relaxation.

[0028] In a possible implementation form of the first aspect, the measurement relaxation criterion is further used to indicate first parameter information and / or second parameter information; wherein the first parameter information is used to evaluate whether a serving cell where the terminal is located satisfies a good cell quality of service criterion or a non-cell edge criterion, and the second parameter information is used to evaluate whether a low mobility criterion is satisfied; and the performing measurement relaxation on one or more of RLM, BFD or RRM based on the measurement relaxation criterion comprises performing measurement relaxation on one or more of RLM, BFD or RRM based on the reference location and the first parameter information and / or the second parameter information.

[0029] In a possible implementation form of the first aspect, the measurement relaxation criterion is further used to indicate first parameter information and / or second parameter information; wherein the first parameter information is used to evaluate whether a serving cell where the terminal is located satisfies a good cell quality of service criterion or a non-cell edge criterion, and the second parameter information is used to evaluate whether a low mobility criterion is satisfied; and the performing measurement relaxation on one or more of RLM, BFD or RRM based on the measurement relaxation criterion comprises performing measurement relaxation on one or more of RLM, BFD or RRM based on the reference location and the first parameter information and / or the second parameter information.

[0030] By combining the good cell quality of service criterion or the non-cell edge criterion, and / or the low mobility criterion, the terminal can not only reduce the power consumption of the terminal, but also improve the effectiveness of measurement relaxation.

[0031] In a possible implementation form of the first aspect, the method further comprises reporting a measurement relaxation state of one or more of RLM, BFD or RRM.

[0032] The measurement relaxation state can be understood as whether the measurement relaxation criterion is satisfied. As an example but not limitation, 1 can be used to represent that the measurement relaxation criterion is satisfied or that the terminal is in the measurement relaxation state or that the measurement relaxation is performed, and 0 can be used to represent that the measurement relaxation criterion is not satisfied or that the terminal is not in the measurement relaxation state or that the measurement relaxation is not performed. The present application does not make any limitation in this regard.

[0033] The second aspect provides a method for measurement relaxation in an NTN, which can be performed by a communication device. The communication device can be a terminal, or a component (such as a chip, a chip system, etc.) configured in the terminal, or a logic module or software capable of realizing all or part of the functions of the terminal, and the present application does not make any limitation in this regard.

[0034] Exemplarily, the method comprises: obtaining a measurement relaxation criterion, the measurement relaxation criterion being used to indicate first time information, the first time information being used to indicate a time for performing measurement relaxation; and performing measurement relaxation on one or more of the following: RLM, BFD or RRM based on the measurement relaxation criterion.

[0035] Based on the above scheme, through the first time information, the terminal can determine whether the measurement relaxation criterion is met within a certain time according to the time of the terminal with the satellite service, and determine the time period in which the measurement relaxation is performed, which not only reduces the power consumption of the terminal, but also avoids starting to determine whether the measurement relaxation criterion is met from the start time of the satellite service to the terminal, and can improve the effectiveness of measurement relaxation.

[0036] In combination with the second aspect, in some possible implementation manners of the first aspect, the first time information comprises: a first time point, the first time point being used to indicate that measurement relaxation is performed before the first time point.

[0037] The first time point is earlier than the time when the serving satellite associated with the NTN serving cell stops serving.

[0038] In combination with the second aspect, in some possible implementation manners of the first aspect, the first time information comprises: a first time length and a second time point, the first time length and the second time point being used to indicate that measurement relaxation is performed within the first time length starting from the second time point.

[0039] The second time point + the first time length is earlier than the time when the serving satellite associated with the NTN serving cell stops serving.

[0040] In combination with the second aspect, in some possible implementation manners of the first aspect, the first time information comprises: a third time point and a fourth time point, the third time point being earlier than the fourth time point, and the third time point and the fourth time point being used to indicate that measurement relaxation is performed between the third time point and the fourth time point.

[0041] The fourth time point is earlier than the time when the serving satellite associated with the NTN serving cell stops serving.

[0042] In the third aspect, the present application provides a communication apparatus, which can implement the method in the first aspect and the second aspect and any possible implementation manner of the first aspect and the second aspect. The apparatus comprises corresponding modules for performing the above method. The modules included in the apparatus can be implemented in a software and / or hardware manner.

[0043] In the fourth aspect, the present application provides a communication apparatus, which comprises a processor, and the processor can be used to execute a computer program in a memory to implement the method in the first aspect and the second aspect and any possible implementation manner of the first aspect and the second aspect.

[0044] Optionally, the apparatus further includes a communication interface, and the processor is coupled to the communication interface. The communication interface is configured to receive a signal from another communication apparatus outside the apparatus and transmit the signal to the processor, or send a signal from the processor to another communication apparatus outside the apparatus. For example, the communication interface can be a transceiver, a circuit, a bus, a module, a pin, or another type of communication interface.

[0045] Optionally, the apparatus further includes a memory, and the processor is coupled to the memory. The memory is configured to store program instructions and data. The memory is coupled to the processor, and the processor executes the instructions stored in the memory to implement the method described in the aspects.

[0046] In a fifth aspect, a computer readable storage medium is provided, which stores a computer program or instructions, and when the computer program or instructions are executed, the method described in the first aspect and the second aspect and any possible implementation manner of the first aspect and the second aspect is implemented.

[0047] In a sixth aspect, a computer program product is provided, which includes instructions, and when the instructions are executed, the method described in the first aspect and the second aspect and any possible implementation manner of the first aspect and the second aspect is implemented.

[0048] In a seventh aspect, a chip system is provided, which includes at least one processor, and the processor is configured to support the functions described in the first aspect and the second aspect and any possible implementation manner of the first aspect and the second aspect, for example, receiving or processing the data involved in the above method.

[0049] In a possible design, the chip system further includes a memory, and the memory is configured to store program instructions and data, and the memory is located in the processor or outside the processor.

[0050] In a possible design, the chip system further includes an interface circuit and / or a power supply circuit, and the interface circuit is configured to transmit data, and the power supply circuit is configured to supply power to the chip system.

[0051] The chip system can be composed of a chip, or can include a chip and other discrete devices.

[0052] It should be understood that the third aspect to the seventh aspect of the present application correspond to the technical solutions of the first aspect and the second aspect of the present application, and the beneficial effects obtained by each aspect and the corresponding possible implementation manner are similar, which will not be described again. BRIEF DESCRIPTION OF DRAWINGS

[0053] FIG. 1 is a schematic diagram of a network architecture of an NTN according to an embodiment of the present application;

[0054] FIG. 2 is a schematic diagram of another network architecture of an NTN according to an embodiment of the present application;

[0055] FIG. 3 is a schematic flowchart of a method for measurement relaxation in an NTN according to an embodiment of the present application;

[0056] FIG. 4 is a schematic diagram of entering and exiting a measurement relaxation state according to an embodiment of the present application;

[0057] FIG. 5 is a schematic flowchart of another method for measurement relaxation in an NTN according to an embodiment of the present application;

[0058] FIG. 6 is a schematic diagram of interaction between a base station and a terminal according to an embodiment of the present application;

[0059] FIG. 7 is a schematic diagram of interaction between a base station and a terminal suitable for a method for measurement relaxation in an NTN according to an embodiment of the present application;

[0060] FIG. 8 is another schematic diagram of interaction between a base station and a terminal suitable for a method for measurement relaxation in an NTN according to an embodiment of the present application;

[0061] FIG. 9 is a schematic block diagram of an open RAN architecture suitable for a method for measurement relaxation in an NTN according to an embodiment of the present application;

[0062] FIG. 10 is a schematic block diagram of a communication apparatus according to an embodiment of the present application;

[0063] FIG. 11 is another schematic block diagram of a communication apparatus according to an embodiment of the present application;

[0064] FIG. 12 is yet another schematic diagram of a communication apparatus according to an embodiment of the present application. DETAILED DESCRIPTION

[0065] The technical solutions in the present application will be described below with reference to the accompanying drawings.

[0066] To facilitate understanding of the technical solutions provided in the present application, the following points are first explained:

[0067] First, in the present application, the terms “comprise” and “have” and any variations thereof are intended to cover non-exclusive inclusion, for example, an apparatus, system, product or device comprising a series of modules, modules or units does not have to be limited to only those clearly listed, but can include other modules, modules or units not clearly listed or inherent to the apparatus, system, product or device.

[0068] Second, in the present application, "at least one (or one or more)" means one or more, and "more" means two or more. The "and / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after it, but does not rule out the case that the associated objects before and after it represent an "and" relationship. The specific meaning can be understood in combination with the context. "At least one (or one or more)" or similar expressions mean any combination of these items, including any combination of single item (or one) or multiple items (or more). For example, at least one of a, b, or c can represent: a, b, c; a and b; a and c; b and c; or a and b and c. Where a, b, and c can be single or multiple.

[0069] Third, in the present application, "sending" and "receiving" represent the direction of signal transmission. For example, "sending information to a terminal" can be understood as that the destination of the information is the terminal, which can include direct sending through the air interface, and also includes indirect sending through the air interface by other units or modules. "Receiving information from a base station" can be understood as that the source of the information is the base station, which can include direct receiving from the base station through the air interface, and also includes indirect receiving from the base station through the air interface from other units or modules. "Sending" can also be understood as "output" of a chip interface, and "receiving" can also be understood as "input" of a chip interface.

[0070] In other words, sending and receiving can be between devices, such as between an NTN device and a terminal; or can be within a device, such as between components, modules, chips, software modules or hardware modules within a device through a bus, wire or interface.

[0071] Fourth, in the present application, "when", "in the case of", "if" and "if" all mean that the device will make corresponding processing under certain objective circumstances, not limited to time, and also does not require the device to have a judgment action when it is implemented. It also does not mean that there are other limitations.

[0072] Fifth, in the present application, the words "example", "exemplarily", "for example" or "such as" are used to indicate as an example, illustration or description. Any embodiment or design scheme described as "example", "exemplarily", "for example" or "such as" in the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the words "example", "exemplarily", "for example" or "such as" are intended to present the relevant concept in a specific way.

[0073] Sixth, the same items or similar items with basically the same functions and effects are distinguished by using the terms such as "first", "second", "third", and "fourth". For example, the first preset threshold and the second preset threshold are used to distinguish different preset thresholds, the first parameter information and the second parameter information are used to distinguish different parameter information, the first distance threshold, the second distance threshold, the third distance threshold, and the fourth distance threshold are used to distinguish different thresholds, the first time point, the second time point, the third time point, and the fourth time point are used to distinguish different time points, and the order is not limited. Those skilled in the art can understand that the terms such as "first", "second", "third", and "fourth" do not limit the quantity and execution order, and the terms such as "first", "second", "third", and "fourth" do not necessarily mean different.

[0074] Seventh, in the present application, the preset can be understood as predefined, defined, pre-defined, stored, pre-stored, pre-negotiated, or pre-configured.

[0075] Eighth, in the present application, indication can include explicit indication (also known as direct indication) and implicit indication (also known as indirect indication). Among them, the explicit indication information A means to include the information A; the implicit indication information A means to indicate the information A through the correspondence between the information A and the information B and the direct indication of the information B, and the correspondence between the information A and the information B can be pre-defined, pre-stored, pre-burned, or pre-configured; or, it can also mean to indicate the information A through the information B and the preset rule.

[0076] Ninth, in the present application, the terminal can also be referred to as a terminal device, a terminal device, user equipment (user equipment, UE), a mobile station, a mobile terminal, etc. The terminal can include but not limited to: a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (virtual reality, VR) device, an augmented reality (augmented reality, AR) device, a mixed reality (mixed reality, MR) device, an extended reality (extended reality, XR) device, a wireless terminal in industrial control, a vehicle-mounted device, a wireless terminal in unmanned driving, a wireless terminal in remote medical treatment, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, a wearable device, a video player, a full-system projector, etc. The present application does not limit the specific type of terminal.

[0077] Tenth, in the present application, the NTN device can be a base station, an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP), a gNB, a base station in a future mobile communication system, etc., and the type of the NTN device is not limited in the present application.

[0078] Eleventh, in the present application, the ephemeris information and satellite time of epoch of the service satellite associated with the NTN serving cell can also be understood as the moving trajectory and time of epoch of the NTN device (for example, a satellite, a drone or a high-altitude platform, etc.) associated with the NTN serving cell. In addition, in the present application, the measurement relaxation of the terminal performing RRM on the NTN serving cell and / or the neighbor cell of the NTN serving cell can be understood as the RRM measurement relaxation of the terminal in the same frequency and / or different frequency.

[0079] In order to more clearly understand the method provided by the embodiments of the present application, the technical terms related to NTN will be explained in detail below in conjunction with the drawings.

[0080] 1. NTN: Compared with ground network communication (or land communication), NTN communication has the advantages of large coverage area, flexible networking, etc. NTN communication includes networking by using drones, high-altitude platforms, satellites and other devices to provide data transmission, voice communication and other services for terminals. The high-altitude platform station (HAPS) device is generally 8-50 kilometers (km) above the ground.

[0081] 2. NTN payload: A network node carried on a satellite or a high-altitude platform station, which provides connectivity between a service link and a feeder link. The NTN payload can be a transparent payload or a regenerative payload.

[0082] 3. Feeder link: The wireless link between the NTN gateway and the NTN payload.

[0083] 4. Service link: Also known as traffic link, the wireless link between the NTN payload and the terminal.

[0084] The common network architecture in NTN communication will be described below in conjunction with FIG. 1 and FIG. 2.

[0085] FIG. 1 is a schematic diagram of a network architecture of an NTN according to an embodiment of the present application.

[0086] FIG. 1 shows a non-regenerative star NTN network architecture, which can include network elements of a core network (CN) (e.g., an access and mobility management function (AMF) network element / user plane function (UPF) network element), a ground station, a satellite, and a terminal. In the NTN network architecture, a non-terrestrial NR access is provided to the terminal through an NTN payload and an NTN gateway. The NTN gateway is located on the ground station on the earth's surface and provides a connection with the NTN payload using a feeder link. The NTN payload is carried on a network node on a satellite (or high-altitude platform station) and provides connectivity between the service link and the feeder link, i.e., the satellite and the ground station can have the capability of a base station (e.g., a gNB) as shown in FIG. 1, or in other words, the satellite and the ground station constitute a base station in the network architecture. In the communication process between the base station and the terminal, the base station communicates with the terminal through an NR Uu interface, and the base station communicates with the AMF network element / UPF network element through a next generation (NG) interface. The NTN payload can forward a wireless protocol received from the terminal through the service link to the NTN gateway through the feeder link. The NTN payload supports the following connections: one NTN gateway can serve multiple NTN payloads; or one NTN payload can be served by multiple NTN gateways.

[0087] FIG. 2 is a schematic diagram of another network architecture of an NTN according to an embodiment of the present application.

[0088] FIG. 2 shows a regenerative star NTN network architecture, which can include network elements of a CN (e.g., an AMF network element / UPF network element), a ground station, a satellite, and a terminal.

[0089] As shown in FIG. 2, when the satellite works in a regenerative mode, the satellite has data processing capability and has the function of a base station or part of the function of a base station, i.e., the satellite can be regarded as a base station, or in other words, the base station can be deployed on the satellite, or in other words, the function or part of the function of the base station is integrated on the satellite. The satellite can communicate with the terminal through an NR Uu interface, the satellite can communicate with the CN through an NG interface, and the satellite can communicate with another satellite through an Xn interface. The NTN gateway is located on the ground station on the earth's surface and provides a connection with the NTN payload using a feeder link. The NTN payload is carried on a network node on a satellite (or high-altitude platform station) and provides connectivity between different satellites through an inter-satellite link. In the network architecture, the satellite can be regarded as an NG-RAN node.

[0090] In the network architecture shown in FIG. 1 or FIG. 2, the satellite can be a geostationary earth orbit (GEO) satellite, a medium earth orbit (MEO) satellite, or a low earth orbit (LEO) satellite, and the satellite can also be replaced by a HAPS device, a drone, or other NTN device, and the type of the satellite is not limited in the present application.

[0091] FIG. 1 and FIG. 2 are only examples and should not impose any limitation on the present application.

[0092] 5、Non-geosynchronous orbit (NGSO): an orbit centered on the Earth whose orbital period does not match the Earth's rotation. NGSO can include LEO and MEO.

[0093] 6、Geosynchronous orbit: also known as geostationary orbit, is an orbit centered on the Earth, located about 35786 km from the Earth's surface, and synchronized with the Earth's rotation. More precisely, the geosynchronous orbit is a non-inclined geosynchronous orbit, i.e., located in the Earth's equatorial plane.

[0094] 7、GEO satellite: also known as synchronous orbit satellite, the orbit height of GEO satellite is 35786 km, the advantage of GEO satellite communication is that it can remain relatively stationary to the ground and provide a larger coverage area.

[0095] 8、MEO satellite: for example, the orbit height of MEO satellite is located at 2000 km to 35786 km, the advantage of MEO satellite communication is that global coverage can be achieved with relatively fewer number of satellites. MEO satellites are mainly used for positioning and navigation.

[0096] 9、LEO satellite: for example, the orbit height of LEO satellite is 300 km to 2000 km, LEO satellite has lower orbit height than MEO satellite and GEO satellite, has the advantages of small data propagation delay, small transmission loss, and relatively low launch cost.

[0097] In the NTN network architecture, the following service links can be supported: earth fixed service link, quasi-earth-fixed service link, and earth moving service link.

[0098] Among them, the earth-fixed service link is provided by the beam, which always continuously covers the same geographical area, for example, the case of geosynchronous orbit satellite. The quasi-earth-fixed service link is provided by the beam, which covers a geographical area in one time period and covers another different geographical area in another time period, for example, the case of NGSO satellite generating steerable beams. The earth-moving service link is provided by the beam whose coverage area slides on the earth's surface, for example, the case of NGSO satellite generating fixed or non-steerable beams.

[0099] It can be understood that using NGSO satellites, a gNB can provide quasi-earth-fixed service links or earth-moving service links, while a gNB operating using GSO satellites can provide earth-fixed service links.

[0100] 10、RLM: The terminal monitors the downlink radio link quality based on the reference signal configured as the RLM-reference signal (RS) resource, and detects the downlink radio link quality of the primary cell (PCell) or the primary serving cell (PSCell) in NR. When there is no RLM-RS resource configured, the terminal can monitor the downlink radio link quality of the synchronization signal block (SSB).

[0101] In the discontinuous reception (DRX) mode operation, the terminal evaluates the radio link quality once every indication period. The terminal can determine the indication period as the maximum value of both the shortest period of the radio link monitoring resource and the DRX period.

[0102] In the non-DRX mode operation, the terminal evaluates the radio link quality once every indication period. The terminal can determine the indication period as the maximum value of both the shortest period of the radio link monitoring resource and 10 milliseconds (ms).

[0103] 11、BFD: The gNB configures the beam failure detection reference signal on each serving cell to the terminal, and when the number of beam failure instance indications from the physical layer reaches the configured threshold value before the configured timer expires, the terminal declares beam failure.

[0104] 12、RRM: It is to provide quality of service guarantee for wireless user terminals in the network under the condition of limited bandwidth, to flexibly allocate and dynamically adjust the available resources of the radio transmission part and the network under the condition of uneven distribution of network traffic, fluctuation of channel characteristics due to channel fading and interference, etc., to maximize the utilization of wireless spectrum, prevent network congestion and keep the signaling load as small as possible.

[0105] 13. Connected terminal: The terminal is in connected state. A radio resource control (RRC) connection has been established between the terminal and the NTN device (e.g., a satellite base station), allowing data transmission and / or signaling interaction between the terminal and the NTN device.

[0106] 14. Idle Terminal: The terminal is in an idle state, and no RRC connection has been established between the terminal and NTN equipment (such as a satellite base station). Although in an idle state, the terminal still maintains basic communication with the network in order to quickly respond to network calls or data transmission requests.

[0107] 15. Inactive Terminal: The terminal is in an inactive state. The RRC connection between the terminal and the NTN device (e.g., a satellite base station) is suspended, but certain context information is still maintained to facilitate quick connection recovery. It can be understood that the inactive state is a state between the connected state and the idle state.

[0108] 16. Low Mobility Standard: The quality of the serving cell changes within a certain threshold range over a given period of time. The low mobility standard can also be called the stationary standard or the stability standard; in other words, the principle behind the stationary standard or the stability standard is the same as that of the low mobility standard.

[0109] For example, the time period threshold is T threshold The threshold for the change in serving cell quality (dB) or serving cell received level (RX level value (dB)) is S. threshold If, in T threshold The internal judgment determines that the change in the quality of the serving cell is less than the threshold S. threshold If so, it can be considered that the low mobility criterion is met.

[0110] 17. Good Serving Cell Quality Criteria: For connected terminals, when the downlink radio link quality on the configured RLM-RS resources is evaluated to be better than a preset threshold (e.g., threshold Qin + X dB), it is considered to meet the relaxed measurement criteria for good serving cell quality of RLM. Similarly, when the downlink radio link quality on the configured BFD-RS resources is evaluated to be better than a preset threshold (e.g., threshold Qin + X dB), it is considered to meet the relaxed measurement criteria for good serving cell quality of BFD. Wherein: TS 38.133 specifies that Qin,X is the parameter offset of the serving cell being evaluated.

[0111] 18. RRM measurement: the connected terminal measures multiple beams (at least one) of a serving cell or a non-serving cell and averages the measurement results (power values) to obtain the cell quality. The idle terminal and the inactive terminal select a suitable cell when the measured cell property meets the cell selection criterion; the idle terminal and the inactive terminal measure the properties of the serving cell and the adjacent cell to start the reselection process.

[0112] For the idle terminal or the inactive terminal, the good serving cell quality criterion can be referred to as the not at cell edge criterion. That is, when the terminal judges that the serving cell reception level is higher than a preset threshold, or the serving cell reception quality value is higher than a preset threshold, the terminal can judge that the not at cell edge criterion is met.

[0113] In the NTN, the terminal performs RLM, BFD and RRM. However, when performing RLM, BFD or RRM, the power consumption of the terminal is relatively large. To solve this problem, the embodiment of the present application provides a measurement relaxation method in an NTN. The terminal can obtain a measurement relaxation criterion, and the measurement relaxation criterion can be used to indicate a reference position related to an NTN cell to be measured. The terminal performs measurement relaxation of RLM, BFD or RRM of the NTN cell to be measured based on the measurement relaxation criterion, so as to reduce the power consumption of the terminal.

[0114] The measurement relaxation method in the NTN provided by the embodiment of the present application will be described in detail below with reference to the accompanying drawings.

[0115] For the sake of brevity of expression, a satellite base station is described as an example of the NTN device in the following. It can be understood that the base station appearing in the following can also be understood as a satellite base station.

[0116] FIG. 3 is a schematic flowchart of a measurement relaxation method in an NTN provided by an embodiment of the present application.

[0117] The method 300 shown in FIG. 3 can include step 310 and step 320. The method 300 can be performed by a communication device, which can be a terminal, or a component (such as a chip, a chip system, etc.) configured in the terminal, or a logic module or software capable of realizing all or part of the terminal function, which is not limited in the present application. In the following, the terminal is taken as an example to describe each step in the method 300 in detail.

[0118] In step 310, the terminal obtains a measurement relaxation criterion, and the measurement relaxation criterion is used to indicate a reference position, and the reference position is associated with an NTN cell to be measured.

[0119] The reference position is associated with the to-be-measured NTN cell. It can be understood that each to-be-measured NTN cell corresponds to a reference position, and the reference positions of different to-be-measured NTN cells can be different.

[0120] In the embodiments of the present application, the reference position can be a point on the earth's surface, or can be an ellipsoid point close to the earth's surface. The reference position can include latitude and longitude, and the specific format and definition of the reference position can refer to the format and definition of the ellipsoid point in the TS 37.355 protocol.

[0121] In a possible implementation, the reference position can be a fixed reference position. This implementation can be suitable for quasi fixed cells.

[0122] In another possible implementation, the reference position can be a reference position corresponding to a certain specified time reference, and the time reference is indicated by an epoch time. This implementation can be suitable for earth moving cells.

[0123] The terminal obtains the measurement relaxation criterion. It can be understood that the terminal can receive all or part of the measurement relaxation criterion from other devices (for example, a base station), and the part of the measurement relaxation criterion can be configured on the terminal.

[0124] For example, the measurement relaxation criterion can be carried in an NTN cell broadcast message, and the terminal can receive the NTN cell broadcast message to obtain the measurement relaxation criterion. Alternatively, the measurement relaxation criterion can be carried in an RRC dedicated message, such as an RRC reconfiguration message or an RRC release message, and the terminal can receive the RRC dedicated message to obtain the measurement relaxation criterion.

[0125] For example, the base station or the NTN cell can send the measurement relaxation criterion carrying the above-mentioned reference position to the terminal through an NTN cell broadcast message or an RRC dedicated message, and accordingly, the terminal can receive the measurement relaxation criterion from the base station or the NTN cell.

[0126] In step 320, the terminal performs measurement relaxation on one or more of the following based on the measurement relaxation criterion: RLM, BFD, or RRM.

[0127] After obtaining the measurement relaxation criterion, the terminal can perform measurement relaxation on one or more of RLM, BFD, or RRM of the to-be-measured NTN cell based on the measurement relaxation criterion.

[0128] In the embodiments of the present application, the measurement relaxation of the RLM of the NTN cell to be measured can include but is not limited to the following possible implementation manners:

[0129] In a possible implementation manner, the connected terminal can enable a longer measurement period (or evaluation period, or sampling interval), and measure the air interface service quality of the NTN cell to be measured based on the RLM reference signal, i.e., the channel-state information (CSI)-RS (CSI-RS) and / or SSB.

[0130] In another possible implementation manner, the connected terminal can not detect the air interface link of the NTN cell to be measured within a preset period (for example, 10 minutes, 30 minutes, 1 hour, 2 hours, …), that is, the connected terminal can stop detecting the air interface link of the NTN cell to be measured within the preset period.

[0131] In the embodiments of the present application, the measurement relaxation of the BFD of the NTN cell to be measured can include but is not limited to the following possible implementation manners:

[0132] In a possible implementation manner, the connected terminal can enable a longer measurement period (or evaluation period, or sampling interval), and measure the air interface service quality of the NTN cell to be measured based on the CSI-RS and / or SSB and / or RLM-RS.

[0133] In another possible implementation manner, the connected terminal can not perform beam failure detection measurement on the NTN cell to be measured within a preset period (for example, 10 minutes, 30 minutes, 1 hour, 2 hours, …), that is, the connected terminal can stop performing beam failure detection on the NTN cell to be measured within the preset period.

[0134] In the embodiments of the present application, for the idle terminal or the inactive terminal, the measurement relaxation of the RRM of the neighbor cell of the NTN serving cell can include but is not limited to the following possible implementation manners:

[0135] In a possible implementation, the idle-state terminal or the inactive-state terminal can enable a longer measurement period (or evaluation period, or sampling interval) to perform the RRM measurement on the neighbor cell of the NTN serving cell, such as the inter-frequency or inter-radio access technology (RAT) RRM measurement. For example, but not limitation, in a case that the service quality or the reception level of the NTN serving cell is lower than a first preset threshold but higher than a second preset threshold (the second preset threshold is lower than the first preset threshold, and the second preset threshold can be understood as the lowest preset threshold), the idle-state terminal or the inactive-state terminal can lengthen the measurement period to a determined value, such as 60 seconds (s), 70s, 80s, 90s, or the like. Alternatively, in a case that the service quality or the reception level of the NTN serving cell is higher than the second preset threshold, the idle-state terminal or the inactive-state terminal can lengthen the measurement period to a determined value, such as 60s, 70s, 80s, 90s, or the like. Alternatively, in a case that the service quality or the reception level of the NTN serving cell is lower than the first preset threshold, the idle-state terminal or the inactive-state terminal can lengthen the measurement period to a determined value, such as 60s, 70s, 80s, 90s, or the like.

[0136] In another possible implementation, the idle-state terminal or the inactive-state terminal can not perform the RRM measurement on the neighbor cell of the NTN serving cell within a preset period (for example, 10 minutes, 30 minutes, 1 hour, 2 hours, or the like), that is, the idle-state terminal or the inactive-state terminal can stop the RRM measurement on the neighbor cell of the NTN serving cell within the preset period.

[0137] It should be noted that, in this application, the idle-state terminal or the inactive-state terminal can also relax the RRM measurement on the NTN serving cell based on the above-mentioned possible implementations, and for the sake of brevity, the details are not described herein.

[0138] It should be further noted that, for the idle-state terminal or the inactive-state terminal, in a case that the RRM measurement relaxation on the NTN serving cell and / or on the neighbor cell of the NTN serving cell is met, the idle-state terminal or the inactive-state terminal does not directly start to perform the RRM measurement relaxation. For example, but not limitation, in a possible implementation, the idle-state terminal or the inactive-state terminal can first report to the base station to inform the base station that the idle-state terminal or the inactive-state terminal needs to perform the RRM measurement relaxation on the NTN serving cell and / or on the neighbor cell of the NTN serving cell, and then the base station can send a cell broadcast message or an RRC release message to the idle-state terminal or the inactive-state terminal to instruct the idle-state terminal or the inactive-state terminal to perform the RRM measurement relaxation on the NTN serving cell and / or on the neighbor cell of the NTN serving cell.

[0139] In the embodiments of the present application, for the connected terminal, the measurement relaxation of the RRM of the NTN serving cell and / or the neighbor cell can include, but is not limited to, the following possible implementation manners:

[0140] In a possible implementation manner, the connected terminal can enable a longer measurement period (or evaluation period, or sampling interval) for the measurement of the RRM of the NTN serving cell and / or the neighbor cell. As an example but not limitation, in the case that the quality of service or the reception level of the NTN serving cell is higher than a third preset threshold, the measurement period of the RRM of the NTN serving cell and / or the neighbor cell can be lengthened to a determined value, for example, 60s, 70s, 80s, 90s, ….

[0141] In another possible implementation manner, the connected terminal can not perform the measurement of the RRM of the NTN serving cell and / or the neighbor cell within a preset period of time (for example, 10 minutes, 30 minutes, 1 hour, 2 hours, …), that is, the connected terminal can stop the measurement of the RRM of the NTN serving cell and / or the neighbor cell within the preset period of time.

[0142] In some other possible implementation manners, the connected terminal can not perform the measurement of the RRM of the specified NTN serving cell and / or the neighbor cell; or the connected terminal can not perform the measurement of the RRM of the specified frequency point; or the connected terminal can not perform the measurement of the RRM of the specified measurement object. The specified NTN serving cell and / or the neighbor cell, the specified frequency point, and the specified measurement object can be indicated to the connected terminal by the base station in the RRC reconfiguration message.

[0143] It can be understood that for the connected terminal, in the case that the measurement relaxation of the RRM of the NTN serving cell and / or the neighbor cell of the NTN serving cell is met, the connected terminal does not directly start to perform the measurement relaxation of the RRM. As an example but not limitation, in a possible implementation manner, the connected terminal can first report to the base station to inform the base station that the connected terminal needs to perform the measurement relaxation of the RRM of the NTN serving cell and / or the neighbor cell of the NTN serving cell, and then the base station can send the RRC reconfiguration message to the connected terminal to instruct the connected terminal to perform the measurement relaxation of the RRM of the NTN serving cell and / or the neighbor cell of the NTN serving cell.

[0144] Based on the above technical solutions, in the NTN, the measurement relaxation mechanism of RLM, BFD or RRM based on the reference position of the to-be-measured NTN cell can not only reduce the power consumption of the terminal, but also better adapt to the feature that the difference between the air interface signal quality at the cell center and the cell edge is not obvious in the NTN, and can more effectively perform the measurement of RLM, BFD or RRM.

[0145] In a possible implementation, the terminal is in a connected state, the to-be-measured NTN cell includes an NTN serving cell of the terminal and / or a neighbor cell of the NTN serving cell, and based on the measurement relaxation standard, measurement relaxation of one or more of RLM, BFD or RRM is performed, including: based on the measurement relaxation standard, measurement relaxation of one or more of RLM, BFD or RRM of the NTN serving cell is performed, and / or measurement relaxation of RRM of the neighbor cell is performed.

[0146] That is, in the case that the terminal is a connected terminal, the terminal can perform RLM, BFD or RRM measurement on the NTN serving cell of the terminal and / or the neighbor cell of the NTN serving cell when the measurement relaxation standard is met. The following will be described in detail in connection with implementation modes A to F for the connected terminal. In the implementation modes A to F, the measurement relaxation standard can be carried in an NTN cell broadcast message, or the measurement relaxation standard can be carried in an RRC dedicated message.

[0147] In a possible implementation mode A, the measurement relaxation standard is further used to indicate a first distance threshold, the first distance threshold is associated with the NTN serving cell, and based on the measurement relaxation standard, measurement relaxation of one or more of RLM, BFD or RRM of the NTN serving cell and / or measurement relaxation of RRM of the neighbor cell is performed, including: in the case that the distance between the terminal and the NTN serving cell is less than or equal to the first distance threshold, measurement relaxation of one or more of RLM, BFD or RRM of the NTN serving cell and / or measurement relaxation of RRM of the neighbor cell is performed; wherein the distance between the terminal and the NTN serving cell is determined based on the reference position. This implementation mode can be applicable to quasi-fixed cells.

[0148] Wherein, the first distance threshold associated with the NTN serving cell can be understood as that each NTN serving cell can correspond to a first distance threshold, and the first distance thresholds corresponding to different NTN serving cells can be different. Without loss of generality, hereinafter, "the first distance threshold associated with the NTN serving cell" has the same meaning as the explanation here, and when this content appears again hereinafter, it can be referred to here. For the sake of brevity, it will not be repeated hereinafter.

[0149] For the detailed description of the reference location, please refer to the relevant description of the reference location in step 310 above, which will not be repeated here for brevity.

[0150] In example one, the measurement relaxation criterion can be used to indicate the reference location of the NTN serving cell of the terminal and the first distance threshold Thresh1, in addition, the terminal can know its own location, so that the terminal can calculate the distance Ml1 between the terminal and the NTN serving cell of the terminal based on the reference location and the location of the terminal itself.

[0151] In the case where the distance between the terminal and the NTN serving cell is less than or equal to the first distance threshold Thresh1, i.e., in the case where Ml1≤Thresh1 (for the convenience of description, the condition is denoted as condition 1), the terminal can perform measurement relaxation of one or more of the following for the NTN serving cell: RLM, BFD or RRM, and / or the terminal can perform measurement relaxation of RRM for the neighbor cell.

[0152] By way of example but not limitation, in actual application scenarios, the first distance threshold can be 20 meters (meter, m), 50 m, 100 m, 150 m, 200 m, …, 1000 m, …, 2000 m, …, 3000 m, …, etc.

[0153] The value of the first distance threshold can also be an integer between 0 and 65525, or the value of the first distance threshold can be an integer between 0 and 65535; wherein each step can represent 50 m, for example, in the case where the value of the first distance threshold is 1, it is equivalent to that the first distance threshold is equal to 50 m (obtained by 50 m x 1); in the case where the value of the first distance threshold is 5, it is equivalent to that the first distance threshold is equal to 250 m (obtained by 50 m x 5); in the case where the value of the first distance threshold is 10, it is equivalent to that the first distance threshold is equal to 500 m (obtained by 50 m x 10); and so on. For the sake of brevity, they will not be repeated here. In actual application scenarios, the specific value of the first distance threshold is not limited in the present application.

[0154] In a possible implementation B, the measurement relaxation criterion further indicates a first distance threshold, ephemeris information of a serving satellite, and a satellite time of week, the first distance threshold and the serving satellite being associated with the NTN serving cell; and based on the measurement relaxation criterion, performing measurement relaxation of one or more of RLM, BFD or RRM on the NTN serving cell, and / or performing measurement relaxation of RRM on the neighbor cell, including: in a case that a distance between the terminal and the NTN serving cell is less than or equal to the first distance threshold, performing measurement relaxation of one or more of RLM, BFD or RRM on the NTN serving cell, and / or performing measurement relaxation of RRM on the neighbor cell; wherein the distance between the terminal and the NTN serving cell is determined based on the reference location, the satellite time of week and the ephemeris information. This implementation can be applicable to earth moving cells.

[0155] The first distance threshold and the serving satellite being associated with the NTN serving cell can be understood as that each NTN serving cell can correspond to a first distance threshold and a serving satellite, and the first distance threshold and / or the serving satellite corresponding to different NTN serving cells can be different. Without loss of generality, hereinafter, “the first distance threshold and the serving satellite being associated with the NTN serving cell” is the same as the explanation here, and when this content appears again hereinafter, it can be referred to here. For the sake of brevity, it will not be repeated hereinafter.

[0156] In Example II, the measurement relaxation criterion can be used to indicate a reference location of an NTN serving cell of the terminal and a first distance threshold Thresh1, and ephemeris information and a satellite time of week of a serving satellite associated with the NTN serving cell. In this case, the terminal can determine a position of the NTN serving cell at the time of obtaining the measurement relaxation criterion based on the indicated reference location of the NTN serving cell of the terminal, the ephemeris information and the satellite time of week of the serving satellite associated with the NTN serving cell, and then calculate a distance Ml1 between the terminal and the NTN serving cell of the terminal based on the determined position of the NTN serving cell and the position of the terminal. In a case that Ml1≤Thresh1, the terminal can perform measurement relaxation of one or more of RLM, BFD or RRM on the NTN serving cell, and / or the terminal can perform measurement relaxation of RRM on the neighbor cell.

[0157] Detailed description about the reference location and the first distance threshold can be referred to the related description in the implementation A above, and for the sake of brevity, it will not be repeated here.

[0158] Optionally, in addition to implementation manner A and implementation manner B described above, the measurement relaxation criterion is further used to indicate a hysteresis location (or a hysteresis parameter) (for ease of description, the hysteresis location is denoted as Hys in this application). In the case of Ml1-Hys≤Thresh1 (for ease of description, the condition is denoted as condition 2), the terminal can perform measurement relaxation of one or more of the following for the NTN serving cell: RLM, BFD or RRM, and / or the terminal can perform measurement relaxation of RRM for the neighbor cell.

[0159] By way of example and not limitation, the value of Hys can be 10m, 20m, 30m, 40m, 50m, …, 100m, …, 150m, 200m, …, 1000m, …, 2000m, …, 3000m, …, etc. The value of Hys can also be an integer between 0 and 32768, where each step can represent 10m. For example, in the case of the value of Hys being 1, it is equivalent to Hys being equal to 10m (obtained by 10m x 1); in the case of the value of Hys being 2, it is equivalent to Hys being equal to 20m (obtained by 10m x 2); in the case of the value of Hys being 10, it is equivalent to Hys being equal to 100m (obtained by 10m x 10); and so on, which will not be repeated here for brevity. In actual application scenarios, the specific value of the hysteresis location is not limited in this application.

[0160] It can be understood that in implementation manner A and implementation manner B described above, in the case where the distance between the terminal and the NTN serving cell is greater than the first distance threshold, the terminal can not perform measurement relaxation of one or more of the following for the NTN serving cell: RLM, BFD or RRM, and / or the terminal can not perform measurement relaxation of RRM for the neighbor cell.

[0161] In a possible implementation C, the reference position comprises a reference position of the NTN serving cell and a reference position of at least one first neighbor cell, the first neighbor cell being any neighbor cell of the NTN serving cell, the measurement relaxation parameter further indicates a first distance threshold and at least one second distance threshold, the first distance threshold being associated with the NTN serving cell, the at least one second distance threshold being associated with the at least one first neighbor cell; and, based on the measurement relaxation criterion, performing measurement relaxation of one or more of the following for the NTN serving cell: RLM, BFD or RRM, and / or, performing measurement relaxation of RRM for the neighbor cell, comprises: in a case that a distance between the terminal and the NTN serving cell is less than or equal to the first distance threshold, and, a distance between the terminal and the first neighbor cell is greater than or equal to the second distance threshold, performing measurement relaxation of one or more of the following for the NTN serving cell: RLM, BFD or RRM, and / or, performing measurement relaxation of RRM for the neighbor cell; wherein the distance between the terminal and the NTN serving cell is determined based on the reference position of the NTN serving cell, and the distance between the terminal and the first neighbor cell is determined based on the reference position of the first neighbor cell.

[0162] The at least one second distance threshold associated with the at least one first neighbor cell can be understood as that one first neighbor cell can correspond to one second distance threshold, and different first neighbor cells can correspond to different second distance thresholds. The detailed description of the second distance threshold can refer to the related description in the implementation A, and will not be repeated here for brevity. Without loss of generality, the at least one second distance threshold associated with the at least one first neighbor cell in the following text has the same meaning as that herein, and when the content appears again in the following text, it can refer to herein for brevity and will not be repeated here.

[0163] In example three, the measurement relaxation criterion can be used to indicate a reference position of the NTN serving cell of the terminal and a first distance threshold Thresh1, and a reference position of at least one first neighbor cell and a second distance threshold corresponding to the first neighbor cell, so that the terminal can calculate the distance Ml1 between the terminal and the NTN serving cell of the terminal based on the reference position of the NTN serving cell and the position of the terminal itself, and the terminal can calculate the distance between each first neighbor cell and the terminal based on the reference position of each first neighbor cell and the position of the terminal itself.

[0164] Taking three first neighbor cells as an example, the distance between the first neighbor cell 1 and the terminal can be denoted as Ml2, and the second distance threshold corresponding to the first neighbor cell 1 is Thresh2; the distance between the first neighbor cell 2 and the terminal can be denoted as Ml3, and the second distance threshold corresponding to the first neighbor cell 2 is Thresh3; the distance between the first neighbor cell 3 and the terminal can be denoted as Ml4, and the second distance threshold corresponding to the first neighbor cell 3 is Thresh4.

[0165] In a possible implementation, the terminal can perform measurement relaxation of one or more of RLM, BFD or RRM on the NTN serving cell and / or perform measurement relaxation of RRM on the neighbor cell under the condition that Ml1≤Thresh1, and Ml2≥Thresh2, Ml3≥Thresh3, Ml4≥Thresh4 (for ease of description, the condition is denoted as condition 3).

[0166] In another possible implementation, the terminal can perform measurement relaxation of one or more of RLM, BFD or RRM on the NTN serving cell and / or perform measurement relaxation of RRM on the neighbor cell under the condition that Ml1≤Thresh1, and at least n (0<n≤m, n and m are integers, and m is the number of first neighbor cells) of the first neighbor cells satisfy that the distance from the terminal is greater than or equal to the corresponding second distance threshold (for ease of description, the condition is denoted as condition 4). Optionally, in a possible implementation, the n can be configured to the terminal by the base station in cell broadcast or RRC dedicated signaling.

[0167] An example, in the case of n=1, for example, the terminal can perform measurement relaxation of one or more of RLM, BFD or RRM on the NTN serving cell and / or perform measurement relaxation of RRM on the first neighbor cell 1 under the condition that Ml1≤Thresh1, and Ml2≥Thresh2; for another example, the terminal can perform measurement relaxation of one or more of RLM, BFD or RRM on the NTN serving cell and / or perform measurement relaxation of RRM on the second neighbor cell 2 under the condition that Ml1≤Thresh1, and Ml3≥Thresh3; for yet another example, the terminal can perform measurement relaxation of one or more of RLM, BFD or RRM on the NTN serving cell and / or perform measurement relaxation of RRM on the third neighbor cell 3 under the condition that Ml1≤Thresh1, and Ml4≥Thresh4.

[0168] Alternatively, in case n = 1, for example, in case Ml1< Thresh1, and, Ml2> Thresh2, the terminal can perform measurement relaxation of one or more of the following: RLM, BFD or RRM for the NTN serving cell, and / or, perform measurement relaxation of RRM for m neighbor cells including the neighbor cell 1; as another example, in case Ml1< Thresh1, and, Ml3> Thresh3, the terminal can perform measurement relaxation of one or more of the following: RLM, BFD or RRM for the NTN serving cell, and / or, perform measurement relaxation of RRM for m neighbor cells including the neighbor cell 2; as a further example, in case Ml1< Thresh1, and, Ml4> Thresh4, the terminal can perform measurement relaxation of one or more of the following: RLM, BFD or RRM for the NTN serving cell, and / or, perform measurement relaxation of RRM for m neighbor cells including the neighbor cell 3.

[0169] As a further example, in case n = 2, for example, in case Ml1< Thresh1, and, Ml2> Thresh2, Ml3> Thresh3, the terminal can perform measurement relaxation of one or more of the following: RLM, BFD or RRM for the NTN serving cell, and / or, perform measurement relaxation of RRM for neighbor cell 1 and neighbor cell 2; as another example, in case Ml1< Thresh1, and, Ml3> Thresh3, Ml4> Thresh4, the terminal can perform measurement relaxation of one or more of the following: RLM, BFD or RRM for the NTN serving cell, and / or, perform measurement relaxation of RRM for neighbor cell 2 and neighbor cell 3; as a further example, in case Ml1< Thresh1, and, Ml2> Thresh2, Ml4> Thresh4, the terminal can perform measurement relaxation of one or more of the following: RLM, BFD or RRM for the NTN serving cell, and / or, perform measurement relaxation of RRM for neighbor cell 1 and neighbor cell 3.

[0170] For example, in the case of n = 2, in the case of Ml1 < Thresh1, and Ml2 > Thresh2, Ml3 > Thresh3, the terminal can perform measurement relaxation of one or more of the following: RLM, BFD, or RRM of the NTN serving cell, and / or perform measurement relaxation of RRM of m neighbor cells including the neighbor cell 1 and the neighbor cell 2; for another example, in the case of Ml1 < Thresh1, and Ml3 > Thresh3, Ml4 > Thresh4, the terminal can perform measurement relaxation of one or more of the following: RLM, BFD, or RRM of the NTN serving cell, and / or perform measurement relaxation of RRM of m neighbor cells including the neighbor cell 2 and the neighbor cell 3; for yet another example, in the case of Ml1 < Thresh1, and Ml2 > Thresh2, Ml4 > Thresh4, the terminal can perform measurement relaxation of one or more of the following: RLM, BFD, or RRM of the NTN serving cell, and / or perform measurement relaxation of RRM of m neighbor cells including the neighbor cell 1 and the neighbor cell 3.

[0171] In another possible implementation, in the case of satisfying the following condition, the terminal can perform measurement relaxation of one or more of the following: RLM, BFD, or RRM of the NTN serving cell, and / or perform measurement relaxation of RRM of the neighbor cell: Ml1 < Thresh1, and a target neighbor cell (specified as one or more neighbor cells) in the first neighbor cell satisfies a distance to the terminal being greater than or equal to a corresponding second distance threshold (for ease of description, the condition is denoted as condition 5). For example, the first neighbor cell 1 and the first neighbor cell 2 are specified as target neighbor cells, that is, in the case of Ml1 < Thresh1, and Ml2 > Thresh2, Ml3 > Thresh3, the terminal can perform measurement relaxation of one or more of the following: RLM, BFD, or RRM of the NTN serving cell, and / or perform measurement relaxation of RRM of the neighbor cell.

[0172] In a possible implementation D, the reference position comprises a reference position of the NTN serving cell and a reference position of at least one first neighbor cell, the first neighbor cell being any neighbor cell of the NTN serving cell; the measurement relaxation parameter further indicates a first distance threshold, ephemeris information of a serving satellite and a satellite time of week, and ephemeris information of at least one neighbor satellite of the serving satellite and at least one second distance threshold, the first distance threshold being associated with the NTN serving cell and the serving satellite, and the at least one second distance threshold being associated with the at least one first neighbor cell; and the measurement relaxation, based on the measurement relaxation criterion, comprises performing measurement relaxation of one or more of RLM, BFD or RRM of the NTN serving cell, and / or performing measurement relaxation of RRM of the neighbor cell, including performing measurement relaxation of one or more of RLM, BFD or RRM of the NTN serving cell, and / or performing measurement relaxation of RRM of the neighbor cell, in a case that a distance between the terminal and the NTN serving cell is less than or equal to the first distance threshold, and a distance between the terminal and the first neighbor cell is greater than or equal to the second distance threshold, wherein the distance between the terminal and the NTN serving cell is determined based on the reference position of the NTN serving cell, the satellite time of week and the ephemeris information of the serving satellite, and the distance between the terminal and the first neighbor cell is determined based on the reference position of the first neighbor cell, the satellite time of week and the ephemeris information of the neighbor satellite.

[0173] In Example Four, the measurement relaxation criterion can indicate a reference position of an NTN serving cell of the terminal, a first distance threshold Thresh1, a reference position of at least one first neighbor cell and a second distance threshold corresponding to the first neighbor cell, and ephemeris information of a serving satellite and a satellite time of week, and ephemeris information of at least one neighbor satellite of the serving satellite. Thus, the terminal can determine a position of the NTN serving cell at a time when the measurement relaxation criterion is obtained, based on the indicated reference position of the NTN serving cell of the terminal, the ephemeris information of the serving satellite of the NTN serving cell and the satellite time of week, and then calculate a distance Ml1 between the terminal and the NTN serving cell based on the determined position of the NTN serving cell and a position of the terminal. The terminal can also determine a position of each first neighbor cell at the time when the measurement relaxation criterion is obtained, based on the indicated reference position of each first neighbor cell and the ephemeris information of a serving satellite corresponding to each first neighbor cell (i.e., a neighbor satellite of the serving satellite corresponding to the NTN serving cell of the terminal) and the satellite time of week, and then calculate a distance between the terminal and each first neighbor cell based on the determined position of each first neighbor cell and the position of the terminal.

[0174] Taking 3 first neighbor cells as an example, the distance between the first neighbor cell 1 and the terminal can be denoted as Ml2, and the second distance threshold corresponding to the first neighbor cell 1 is Thresh2; the distance between the first neighbor cell 2 and the terminal can be denoted as Ml3, and the second distance threshold corresponding to the first neighbor cell 2 is Thresh3; the distance between the first neighbor cell 3 and the terminal can be denoted as Ml4, and the second distance threshold corresponding to the first neighbor cell 3 is Thresh4. In the case where Ml1, Ml2, Ml3 and Ml4 satisfy the conditions, the terminal can perform measurement relaxation of one or more of the following: RLM, BFD or RRM on the NTN serving cell, and / or perform measurement relaxation of RRM on the neighbor cell. The conditions that Ml1, Ml2, Ml3 and Ml4 need to satisfy can be referred to the related description of conditions 3 to 5 in example 3 above, and will not be described here again for brevity.

[0175] Optionally, in the implementation manner C and the implementation manner D above, the measurement relaxation criterion further indicates a hysteresis position 1 (denoted as Hys1 for brevity) and at least one hysteresis position 2. Each first neighbor cell can correspond to one hysteresis position 2. The detailed description of the hysteresis position 1 and the hysteresis position 2 can be referred to the related description of the hysteresis position Hys in the implementation manner A and the implementation manner B above, and will not be described here again for brevity.

[0176] Taking 3 first neighbor cells as an example, the hysteresis position 2 corresponding to the first neighbor cell 1 can be Hys2, the hysteresis position 2 corresponding to the first neighbor cell 2 can be Hys3, and the hysteresis position 2 corresponding to the first neighbor cell 3 can be Hys4.

[0177] In a possible implementation manner, in the case where the following conditions are satisfied, the terminal can perform measurement relaxation of one or more of the following: RLM, BFD or RRM on the NTN serving cell, and / or perform measurement relaxation of RRM on the neighbor cell: Ml1-Hys1≤Thresh1, and, Ml2+Hys2≥Thresh2 (or Ml2-Hys2≥Thresh2), Ml3+Hys3≥Thresh3 (or Ml3-Hys3≥Thresh3), Ml4+Hys4≥Thresh4 (or Ml4-Hys4≥Thresh4) (for brevity, the condition is denoted as condition 6).

[0178] In another possible implementation, the terminal can perform measurement relaxation of one or more of RLM, BFD or RRM on the NTN serving cell and / or perform measurement relaxation of RRM on the neighbor cell under the condition that Ml1-Hys1≤Thresh1, and at least n (n is an integer greater than 0 and less than or equal to the number of the first neighbor cells) of the first neighbor cells satisfy that the distance to the terminal is greater than or equal to the corresponding second distance threshold (for ease of description, the condition is recorded as condition 7).

[0179] In another possible implementation, the terminal can perform measurement relaxation of one or more of RLM, BFD or RRM on the NTN serving cell and / or perform measurement relaxation of RRM on the neighbor cell under the condition that Ml1-Hys1≤Thresh1, and the target neighbor cell (specified as one or more neighbor cells) in the first neighbor cells satisfies that the distance to the terminal is greater than or equal to the corresponding second distance threshold (for ease of description, the condition is recorded as condition 8). For example, the first neighbor cell 1 and the first neighbor cell 2 are specified as the target neighbor cell, that is, under the condition that Ml1-Hys1≤Thresh1, and Ml2+Hys2≥Thresh2 (or Ml2-Hys2≥Thresh2), Ml3+Hys3≥Thresh3 (or Ml3-Hys3≥Thresh3), the terminal can perform measurement relaxation of one or more of RLM, BFD or RRM on the NTN serving cell and / or perform measurement relaxation of RRM on the neighbor cell.

[0180] It can be understood that in the above implementation mode C and implementation mode D, the terminal can not perform measurement relaxation of one or more of RLM, BFD or RRM on the NTN serving cell and / or the terminal can not perform measurement relaxation of RRM on the neighbor cell under the condition that the distance between the terminal and the NTN serving cell is greater than the first distance threshold, or under the condition that the distance between the terminal and the first neighbor cell is less than the second distance threshold.

[0181] In a possible implementation, the measurement relaxation criterion further indicates a distance change threshold and a time duration threshold, the distance change threshold and the time duration threshold are associated with the NTN serving cell; and based on the measurement relaxation criterion, the terminal performs measurement relaxation on one or more of the following: RLM, BFD or RRM of the NTN serving cell, and / or performs measurement relaxation on RRM of the neighbor cell, including: in a case that a change amount of a distance between the terminal and the NTN serving cell is less than or equal to the distance change threshold within the time duration threshold, the terminal performs measurement relaxation on one or more of the following: RLM, BFD or RRM of the NTN serving cell, and / or performs measurement relaxation on RRM of the neighbor cell; wherein the distance between the terminal and the NTN serving cell is determined based on the reference location.

[0182] The distance change threshold and the time duration threshold associated with the NTN serving cell can be understood as that each NTN serving cell can correspond to a distance change threshold and a time duration threshold, and the distance change threshold and / or the time duration threshold corresponding to different NTN serving cells can be different. Without loss of generality, hereinafter, “the distance change threshold and the time duration threshold associated with the NTN serving cell” is the same as the explanation here, and when this content appears again hereinafter, it can be referred to here. In order to be brief, it will not be described hereinafter.

[0183] In Example Five, the measurement relaxation criterion can be used to indicate a reference location of an NTN serving cell of the terminal, a distance change threshold location-delta-threshold and a time duration threshold T-threshold, the terminal can calculate a distance Ml1 between the terminal and the NTN serving cell of the terminal based on the reference location and a location of the terminal itself, in a case that Ml1≤location-delta-threshold within the time duration threshold T-threshold (for the convenience of description, the condition is recorded as condition 9), the terminal can perform measurement relaxation on one or more of the following: RLM, BFD or RRM of the NTN serving cell, and / or the terminal can perform measurement relaxation on RRM of the neighbor cell.

[0184] In a possible implementation F, the measurement relaxation parameter is further used to indicate ephemeris information of a serving satellite, a satellite time, a distance change threshold and a time duration threshold, the serving satellite, the distance change threshold and the time duration threshold being associated with the NTN serving cell; and based on the measurement relaxation criterion, performing measurement relaxation of one or more of the following for the NTN serving cell: RLM, BFD or RRM, and / or performing measurement relaxation of RRM for the neighbor cell, including: in a case where a change in distance between the terminal and the NTN serving cell is less than or equal to the distance change threshold within the time duration threshold, performing measurement relaxation of one or more of the following for the NTN serving cell: RLM, BFD or RRM, and / or performing measurement relaxation of RRM for the neighbor cell; wherein the distance between the terminal and the NTN serving cell is determined based on the reference location, the satellite time and the ephemeris information.

[0185] In example six, the measurement relaxation criterion can be used to indicate a reference location of an NTN serving cell of the terminal, ephemeris information of a serving satellite, a satellite time, a distance change threshold location-delta-threshold and a time duration threshold T-threshold, the terminal can determine a location of the NTN serving cell at the time of obtaining the measurement relaxation criterion based on the reference location, the ephemeris information of the serving satellite and the satellite time, and then calculate a distance Ml1 between the terminal and the NTN serving cell of the terminal based on the determined location of the NTN serving cell and the location of the terminal. In a case where Ml1 - a reference distance value MlRef≤ location-delta-threshold within the time duration threshold T-threshold (for the convenience of description, the condition is referred to as condition 9), the terminal can perform measurement relaxation of one or more of the following for the NTN serving cell: RLM, BFD or RRM, and / or the terminal can perform measurement relaxation of RRM for the neighbor cell.

[0186] In the implementation E and the implementation F, the distance change threshold location-delta-threshold received by the terminal from the base station can be a fixed value. The value of the distance change threshold can refer to the related description of the value of the first distance threshold, and for the sake of brevity, will not be repeated here.

[0187] The reference distance value MlRef can change with the distance between the terminal and the NTN serving cell.

[0188] It can be understood that the reference distance value MlRef is the reference distance between the terminal and the NTN serving cell at present (i.e., at the time when the terminal obtains the measurement relaxation criterion). In one possible implementation manner, the setting manner of the reference distance value MlRef can include but is not limited to the following contents:

[0189] When the terminal just switches from the previous NTN serving cell to the current NTN serving cell, the reference distance value MlRef can be assigned as the current Ml1; or,

[0190] In the subsequent measurement process, if Ml1>MlRef is met, the reference distance value MlRef can be updated as the current Ml1 that is larger; or,

[0191] In the subsequent measurement process, if Ml1≤MlRef is met, but the time duration threshold T-threshold cannot be maintained, the reference distance value MlRef can be updated as the current Ml1.

[0192] In the implementation manner E and the implementation manner F, the time duration threshold T-threshold can be 5s, 10s, 20s, 30s, 60s, 120s, 180s, 240s, 300s, or the like. In actual application scenarios, the specific value of the time duration threshold T-threshold is not limited in the present application.

[0193] In the implementation manner E and the implementation manner F, the base station can configure a first preset threshold, and the terminal can receive a distance change threshold (which can be a fixed value) from the base station. In the time duration threshold, in the case that the distance between the terminal and the NTN serving cell is less than the first preset threshold, and the distance change amount between the terminal and the NTN serving cell is less than the distance change threshold, the terminal can consider that the measurement relaxation state is met. FIG. 4 is a schematic diagram of entering and exiting the measurement relaxation state provided by the present application.

[0194] Exemplarily, as shown in FIG. 4, the terminal judges whether the distance change amount between the terminal and the NTN serving cell is less than or equal to the distance change threshold L threshold within the time duration threshold T threshold . As shown in the figure, within the time duration threshold T threshold , the distance change amount between the terminal and the NTN serving cell is less than or equal to the distance change threshold location-delta-threshold, and therefore, the terminal enters the measurement relaxation state from P1, and continuously meets the measurement relaxation criterion between P1 and P2. After P2, the distance between the terminal and the NTN cell is MlRef>distance change threshold L thresholdThat is, the terminal can exit the measurement relaxation state from P2 if the measurement relaxation criterion is not met after P2.

[0195] It can be understood that in the above-mentioned implementation mode E and implementation mode F, in the time duration threshold, in the case that the change amount of the distance between the terminal and the NTN serving cell is greater than the distance change threshold, or in the case that the time during which the change amount of the distance between the terminal and the NTN serving cell is less than or equal to the distance change threshold does not last for the time duration threshold, the terminal can not perform the measurement relaxation of one or more of the following for the NTN serving cell: RLM, BFD or RRM, and / or the terminal can not perform the measurement relaxation of RRM for the neighbor cell.

[0196] In the above-mentioned implementation mode A to implementation mode F, the detailed description of the terminal performing the measurement relaxation of RLM, BFD or RRM for the NTN serving cell, or the detailed description of the terminal performing the measurement relaxation of RRM for the neighbor cell can refer to the related description of the measurement relaxation of RLM, BFD or RRM for the NTN cell to be measured in step 320 above, and will not be repeated here for brevity.

[0197] In a possible implementation mode, the terminal is in an idle state or an inactive state, the NTN cell to be measured includes the NTN serving cell where the terminal is located and / or the neighbor cell of the NTN serving cell, and based on the measurement relaxation criterion, the measurement relaxation of one or more of the following is performed: RLM, BFD or RRM, including: based on the measurement relaxation criterion, the measurement relaxation of RRM for the neighbor cell is performed, and / or the measurement relaxation of RRM for the NTN serving cell is performed.

[0198] That is, in the case that the terminal is an idle state terminal or an inactive state terminal, the terminal can perform RRM measurement on the neighbor cell of the NTN serving cell of the terminal in the case that the measurement relaxation criterion is met. The idle state terminal or the inactive state terminal is described in detail in combination with implementation mode A1 to implementation mode F1. In implementation mode A1 to implementation mode F1, the measurement relaxation criterion can be carried in the NTN cell broadcast message.

[0199] In a possible implementation A1, the measurement relaxation criterion is further used to indicate a third distance threshold, the third distance threshold being associated with the NTN serving cell; and the performing the measurement relaxation of the RRM of the neighbor cell and / or the performing the measurement relaxation of the RRM of the NTN serving cell based on the measurement relaxation criterion comprises: performing the measurement relaxation of the RRM of the neighbor cell and / or the performing the measurement relaxation of the RRM of the NTN serving cell in a case that a distance between the terminal and the NTN serving cell is less than or equal to the third distance threshold; wherein the distance between the terminal and the NTN serving cell is determined based on the reference location. This implementation can be applied to quasi-geostationary cells.

[0200] The third distance threshold associated with the NTN serving cell can be understood as that each NTN serving cell can correspond to one third distance threshold, and the third distance thresholds corresponding to different NTN serving cells can be different. Without loss of generality, hereinafter, “the third distance threshold associated with the NTN serving cell” is the same as the explanation here, and when this content appears again hereinafter, it can be referred to here. For the sake of brevity, it will not be repeated hereinafter.

[0201] It can be understood that, in actual application scenarios, the third distance threshold can have the same value as the first distance threshold in the implementation A to the implementation D, or can not have the same value, which is not limited in the present application. For detailed description of the third distance threshold, reference can be made to the related description of the first distance threshold in the implementation A above, and for the sake of brevity, it will not be repeated here.

[0202] For detailed description of the reference location, reference can be made to the related description of the reference location in step 310 above, and for the sake of brevity, it will not be repeated here.

[0203] In example seven, the measurement relaxation criterion can be used to indicate the reference location of the NTN serving cell of the terminal and a third distance threshold Thresh5, and in addition, the terminal can know its own location, so that the terminal can calculate the distance Ml1 between the terminal and the NTN serving cell of the terminal based on the reference location and the location of the terminal itself.

[0204] In a case that the distance between the terminal and the NTN serving cell is less than or equal to the third distance threshold Thresh5, that is, in a case that Ml1≤Thresh5 (for the sake of brevity, the condition is recorded as condition 10), the terminal can perform the measurement relaxation of the RRM of the neighbor cell and / or the measurement relaxation of the RRM of the NTN serving cell.

[0205] In a possible implementation B1, the measurement relaxation criterion further indicates a third distance threshold, ephemeris information of a serving satellite, and a satellite time of week, the third distance threshold and the serving satellite being associated with the NTN serving cell; and based on the measurement relaxation criterion, performing the measurement relaxation of RRM on the neighbor cell and / or performing the measurement relaxation of RRM on the NTN serving cell comprises: performing the measurement relaxation of RRM on the neighbor cell and / or performing the measurement relaxation of RRM on the NTN serving cell in a case that a distance between the terminal and the NTN serving cell is less than or equal to the third distance threshold, wherein the distance between the terminal and the NTN serving cell is determined based on the reference location, the satellite time of week, and the ephemeris information. This implementation can be applicable to earth moving cells.

[0206] The third distance threshold and the serving satellite being associated with the NTN serving cell can be understood as that each NTN serving cell can correspond to one third distance threshold and one serving satellite, and the third distance threshold and / or the serving satellite corresponding to different NTN serving cells can be different. Without loss of generality, hereinafter, “the third distance threshold and the serving satellite being associated with the NTN serving cell” is the same as the explanation here, and when this content appears again hereinafter, it can be referred to here. For the sake of brevity, it will not be repeated hereinafter.

[0207] In Example Eight, the measurement relaxation criterion can be used to indicate a reference location of an NTN serving cell of the terminal and a third distance threshold Thresh5, and ephemeris information and a satellite time of week of a serving satellite associated with the NTN serving cell. In this case, the terminal can determine a position of the NTN serving cell at the time of obtaining the measurement relaxation criterion based on the indicated reference location of the NTN serving cell of the terminal, the ephemeris information and the satellite time of week of the serving satellite associated with the NTN serving cell, and then calculate a distance Ml1 between the terminal and the NTN serving cell of the terminal based on the determined position of the NTN serving cell and the position of the terminal. In a case that Ml1≤Thresh5, the terminal can perform the measurement relaxation of RRM on the neighbor cell and / or perform the measurement relaxation of RRM on the NTN serving cell.

[0208] The detailed description of the reference location and the third distance threshold can be referred to the related description in the implementation A1 above, and for the sake of brevity, it will not be repeated here.

[0209] Optionally, in the above implementation manner A1 and implementation manner B1, the measurement relaxation criterion is further used to indicate a hysteresis position Hys. In the case of Ml1-Hys≤Thresh5 (for the convenience of description, this condition is recorded as condition 11), the terminal can perform measurement relaxation of RRM of the neighbor cell and / or measurement relaxation of RRM of the NTN serving cell. The related description of the hysteresis position Hys can be referred to the related description in the above implementation manner A and implementation manner B, and for the sake of brevity, will not be repeated here.

[0210] It can be understood that in the above implementation manner A1 and implementation manner B1, in the case that the distance between the terminal and the NTN serving cell is greater than the first distance threshold, the terminal can not perform measurement relaxation of RRM of the NTN serving cell and / or neighbor cell.

[0211] In a possible implementation manner C1, the reference position includes a reference position of the NTN serving cell and a reference position of at least one first neighbor cell, the first neighbor cell being any neighbor cell of the NTN serving cell; the measurement relaxation parameter is further used to indicate a third distance threshold and at least one fourth distance threshold, the third distance threshold being associated with the NTN serving cell, and the at least one fourth distance threshold being associated with at least one first neighbor cell; and the measurement relaxation of RRM of the neighbor cell and / or the measurement relaxation of RRM of the NTN serving cell based on the measurement relaxation criterion comprises: in the case that the distance between the terminal and the NTN serving cell is less than or equal to the third distance threshold, and the distance between the terminal and the first neighbor cell is greater than or equal to the fourth distance threshold, performing measurement relaxation of RRM of the neighbor cell and / or measurement relaxation of RRM of the NTN serving cell; wherein the distance between the terminal and the NTN serving cell is determined based on the reference position of the NTN serving cell, and the distance between the terminal and the first neighbor cell is determined based on the reference position of the first neighbor cell.

[0212] It can be understood that one first neighbor cell can correspond to one fourth distance threshold, and the fourth distance thresholds corresponding to different first neighbor cells can be different. The detailed description of the fourth distance threshold can be referred to the related description in the above implementation manner A, and for the sake of brevity, will not be repeated here. Without loss of generality, hereinafter, “the at least one fourth distance threshold is associated with at least one first neighbor cell” is the same as the explanation here, and when this content appears again hereinafter, it can be referred to here, and for the sake of brevity, will not be repeated hereinafter.

[0213] In Example Nine, the measurement relaxation criterion can be used to indicate the reference location of the NTN serving cell and a third distance threshold Thresh5, and the reference location of at least one first neighbor cell and a fourth distance threshold corresponding to the first neighbor cell, so that the terminal can calculate the distance Ml1 between the terminal and the NTN serving cell of the terminal based on the reference location of the NTN serving cell and the location of the terminal itself, and the terminal can calculate the distance between each first neighbor cell and the terminal based on the reference location of each first neighbor cell and the location of the terminal itself.

[0214] Taking three first neighbor cells as an example, the distance between the first neighbor cell 1 and the terminal can be denoted as Ml2, and the fourth distance threshold corresponding to the first neighbor cell 1 is Thresh6; the distance between the first neighbor cell 2 and the terminal can be denoted as Ml3, and the fourth distance threshold corresponding to the first neighbor cell 2 is Thresh7; the distance between the first neighbor cell 3 and the terminal can be denoted as Ml4, and the fourth distance threshold corresponding to the first neighbor cell 3 is Thresh8.

[0215] In a possible implementation, the terminal can perform measurement relaxation of RRM on the neighbor cell and / or perform measurement relaxation of RRM on the NTN serving cell when the following condition is met: Ml1≤Thresh5, and Ml2≥Thresh6, Ml3≥Thresh7, Ml4≥Thresh8 (for ease of description, the condition is denoted as condition 12).

[0216] In another possible implementation, the terminal can perform measurement relaxation of RRM on the neighbor cell and / or perform measurement relaxation of RRM on the NTN serving cell when the following condition is met: Ml1≤Thresh5, and at least n (n is an integer greater than 0 and less than or equal to the number of first neighbor cells) of the first neighbor cells satisfy that the distance from the terminal is greater than or equal to the corresponding fourth distance threshold (for ease of description, the condition is denoted as condition 13).

[0217] In another possible implementation, the terminal can perform the measurement relaxation of RRM on the neighbor cell, and / or perform the measurement relaxation of RRM on the NTN serving cell, in case that the following condition is met: Ml1≤Thresh5, and the target neighbor cell (specified certain neighbor cell(s)) in the first neighbor cell meets the distance to the terminal being greater than or equal to a corresponding fourth distance threshold (for ease of description, the condition is denoted as condition 14). For example, the first neighbor cell 1 and the first neighbor cell 2 are specified as the target neighbor cell, that is, in case that Ml1≤Thresh5, and Ml2≥Thresh6, Ml3≥Thresh7, the terminal can perform the measurement relaxation of RRM on the neighbor cell, and / or perform the measurement relaxation of RRM on the NTN serving cell.

[0218] In a possible implementation D1, the reference position comprises a reference position of the NTN serving cell and a reference position of at least one first neighbor cell, the first neighbor cell being any neighbor cell of the NTN serving cell; the measurement relaxation parameter further indicates a third distance threshold, ephemeris information of a serving satellite and a satellite time of week, and ephemeris information of at least one neighbor satellite of the serving satellite and at least one fourth distance threshold, the third distance threshold being associated with the NTN serving cell and the serving satellite, and the at least one fourth distance threshold being associated with the at least one first neighbor cell; and the performing the measurement relaxation of RRM on the neighbor cell, and / or performing the measurement relaxation of RRM on the NTN serving cell based on the measurement relaxation criterion comprises: performing the measurement relaxation of RRM on the neighbor cell, and / or performing the measurement relaxation of RRM on the NTN serving cell in case that the distance between the terminal and the NTN serving cell is less than or equal to the third distance threshold, and the distance between the terminal and the first neighbor cell is greater than or equal to the fourth distance threshold; wherein the distance between the terminal and the NTN serving cell is determined based on the reference position of the NTN serving cell, the satellite time of week and the ephemeris information of the serving satellite, and the distance between the terminal and the first neighbor cell is determined based on the reference position of the first neighbor cell, the satellite time of week and the ephemeris information of the neighbor satellite.

[0219] In Example 10, the measurement relaxation criterion can be used to indicate the reference location of the NTN serving cell of the terminal, the third distance threshold Thresh5, the reference location of at least one first neighbor cell and the fourth distance threshold corresponding to the first neighbor cell, the ephemeris information of the serving satellite and the satellite time of epoch, and the ephemeris information of at least one neighbor satellite of the serving satellite. Thus, the terminal can determine the location of the NTN serving cell at the time when the measurement relaxation criterion is acquired based on the indicated reference location of the NTN serving cell of the terminal, the ephemeris information of the serving satellite associated with the NTN serving cell and the satellite time of epoch, and then calculate the distance Ml1 between the terminal and the NTN serving cell of the terminal based on the determined location of the NTN serving cell and the location of the terminal. The terminal can also determine the location of each first neighbor cell at the time when the measurement relaxation criterion is acquired based on the indicated reference location of each first neighbor cell and the ephemeris information of the serving satellite corresponding to each first neighbor cell (i.e., the neighbor satellite of the serving satellite corresponding to the serving cell of the terminal) and the satellite time of epoch, and then calculate the distance between the terminal and each first neighbor cell based on the determined location of each first neighbor cell and the location of the terminal.

[0220] Taking three first neighbor cells as an example, the distance between the first neighbor cell 1 and the terminal can be denoted as Ml2, and the fourth distance threshold corresponding to the first neighbor cell 1 is Thresh6; the distance between the first neighbor cell 2 and the terminal can be denoted as Ml3, and the fourth distance threshold corresponding to the first neighbor cell 2 is Thresh7; the distance between the first neighbor cell 3 and the terminal can be denoted as Ml4, and the fourth distance threshold corresponding to the first neighbor cell 3 is Thresh8. In the case where Ml1, Ml2, Ml3 and Ml4 satisfy the conditions, the terminal can perform measurement relaxation of RRM on the neighbor cell and / or perform measurement relaxation of RRM on the NTN serving cell. The conditions that Ml1, Ml2, Ml3 and Ml4 need to satisfy can be referred to the related description of conditions 12 to 14 in Example 9 above, and will not be described here again for brevity.

[0221] Optionally, in the implementation mode C1 and the implementation mode D1 described above, the measurement relaxation criterion is further used to indicate a hysteresis location 1 (denoted as Hys1 for brevity) and at least one hysteresis location 2. Each first neighbor cell can correspond to one hysteresis location 2. The detailed description of the hysteresis location 1 and the hysteresis location 2 can be referred to the related description of the hysteresis location Hys in the implementation mode A and the implementation mode B above, and will not be described here again for brevity.

[0222] Taking three first neighbor cells as an example, the hysteresis location 2 corresponding to the first neighbor cell 1 can be Hys2, the hysteresis location 2 corresponding to the first neighbor cell 2 can be Hys3, and the hysteresis location 2 corresponding to the first neighbor cell 3 can be Hys4.

[0223] In a possible implementation, the terminal can perform measurement relaxation of RRM on the neighbor cell, and / or perform measurement relaxation of RRM on the NTN serving cell, in a case where the following condition is met: Ml1-Hys1≤Thresh5, and Ml2+Hys2≥Thresh6 (or Ml2-Hys2≥Thresh6), Ml3+Hys3≥Thresh7 (or Ml3-Hys3≥Thresh7), Ml4+Hys4≥Thresh8 (or Ml4-Hys4≥Thresh8) (for ease of description, the condition is referred to as condition 15).

[0224] In another possible implementation, the terminal can perform measurement relaxation of RRM on the neighbor cell, and / or perform measurement relaxation of RRM on the NTN serving cell, in a case where the following condition is met: Ml1-Hys1≤Thresh5, and at least n (n is an integer greater than 0 and less than or equal to the number of the first neighbor cells) of the first neighbor cells satisfy that the distance from the terminal is greater than or equal to the corresponding fourth distance threshold (for ease of description, the condition is referred to as condition 16).

[0225] In another possible implementation, the terminal can perform measurement relaxation of RRM on the neighbor cell, and / or perform measurement relaxation of RRM on the NTN serving cell, in a case where the following condition is met: Ml1-Hys1≤Thresh5, and the target neighbor cell (specified by one or more neighbor cells) in the first neighbor cells satisfies that the distance from the terminal is greater than or equal to the corresponding fourth distance threshold (for ease of description, the condition is referred to as condition 17). For example, the first neighbor cell 1 and the first neighbor cell 2 are specified as the target neighbor cell, that is, in a case where Ml1-Hys1≤Thresh5, and Ml2+Hys2≥Thresh6 (or Ml2-Hys2≥Thresh6), Ml3+Hys3≥Thresh7 (or Ml3-Hys3≥Thresh7), the terminal can perform measurement relaxation of RRM on the neighbor cell, and / or perform measurement relaxation of RRM on the NTN serving cell.

[0226] It can be understood that, in the implementation C1 and the implementation D1, in a case where the distance from the terminal to the NTN serving cell is greater than the first distance threshold, or in a case where the distance from the terminal to the first neighbor cell is less than the second distance threshold, the terminal can not perform measurement relaxation of RRM on the NTN serving cell and / or the neighbor cell.

[0227] In a possible implementation where the measurement relaxation criterion is used to indicate the distance change threshold and the time duration threshold, the distance change threshold and the time duration threshold are associated with the NTN serving cell; and the performing the measurement relaxation of the RRM of the neighbor cell and / or the performing the measurement relaxation of the RRM of the NTN serving cell based on the measurement relaxation criterion comprises: performing the measurement relaxation of the RRM of the neighbor cell and / or the performing the measurement relaxation of the RRM of the NTN serving cell in a case that a change amount of a distance between the terminal and the NTN serving cell is less than or equal to the distance change threshold within the time duration threshold; and wherein the distance between the terminal and the NTN serving cell is determined based on the reference location.

[0228] In an example XI, the measurement relaxation criterion can be used to indicate a reference location of the NTN serving cell of the terminal, a distance change threshold location-delta-threshold, and a time duration threshold T-threshold, the terminal can calculate a distance Ml1 between the terminal and the NTN serving cell of the terminal based on the reference location and a location of the terminal itself, and in a case that Ml1≤ location-delta-threshold within the time duration threshold T-threshold (for the convenience of description, the condition is recorded as condition 9), the terminal can perform the measurement relaxation of the RRM of the neighbor cell and / or the measurement relaxation of the RRM of the NTN serving cell.

[0229] In a possible implementation F1, the measurement relaxation parameter is further used to indicate ephemeris information of a serving satellite, satellite epoch time, distance change threshold, and time duration threshold, the serving satellite, the distance change threshold, and the time duration threshold are associated with the NTN serving cell; and the performing the measurement relaxation of the RRM of the neighbor cell and / or the performing the measurement relaxation of the RRM of the NTN serving cell based on the measurement relaxation criterion comprises: performing the measurement relaxation of the RRM of the neighbor cell and / or the performing the measurement relaxation of the RRM of the NTN serving cell in a case that a change amount of a distance between the terminal and the NTN serving cell is less than or equal to the distance change threshold within the time duration threshold; and wherein the distance between the terminal and the NTN serving cell is determined based on the reference location, the satellite epoch time, and the ephemeris information.

[0230] In Example 12, the measurement relaxation criterion can be used to indicate a reference location of the NTN serving cell of the terminal, ephemeris information of the serving satellite, a satellite time of week, a distance change threshold location-delta-threshold, and a time duration threshold T-threshold. The terminal can determine a location of the NTN serving cell at the time when the measurement relaxation criterion is acquired based on the reference location, the ephemeris information of the serving satellite, and the satellite time of week, and then calculate a distance Ml1 between the terminal and the NTN serving cell of the terminal based on the determined location of the NTN serving cell and the location of the terminal. In a case where Ml1 - a reference distance value MlRef≤ location-delta-threshold within the time duration threshold T-threshold (for the convenience of description, the condition is denoted as condition 9), the terminal can perform the measurement relaxation of the RRM of the neighbor cell and / or perform the measurement relaxation of the RRM of the NTN serving cell.

[0231] In the implementation manner E1 and the implementation manner F1, the distance change threshold location-delta-threshold received by the terminal from the base station can be a fixed value. The value of the distance change threshold can refer to the related description of the value of the first distance threshold, and for the sake of brevity, will not be repeated here.

[0232] The reference distance value MlRef can change with the distance between the terminal and the NTN serving cell. The detailed description of the reference distance value MlRef can refer to the related description in Example 6 above, and for the sake of brevity, will not be repeated here.

[0233] It can be understood that in the above-mentioned implementation manner E1 and the implementation manner F1, in the case where the change amount of the distance between the terminal and the NTN serving cell is greater than the distance change threshold within the time duration threshold, or in the case where the time during which the change amount of the distance between the terminal and the NTN serving cell is less than or equal to the distance change threshold does not last enough the time duration threshold, the terminal can not perform the measurement relaxation of the RRM of the NTN serving cell and / or the neighbor cell.

[0234] In the implementation manner E1 and the implementation manner F1, the detailed description of the time duration threshold T-threshold can refer to the related description in the above-mentioned implementation manner E and the implementation manner F, and for the sake of brevity, will not be repeated here.

[0235] In the above-mentioned implementation manner A1 to the implementation manner F1, the detailed description of the terminal performing the measurement relaxation of the RRM of the neighbor cell and / or performing the measurement relaxation of the RRM of the NTN serving cell can refer to the related description of the measurement relaxation of the RRM of the NTN serving cell and the neighbor cell in step 320 above, and for the sake of brevity, will not be repeated here.

[0236] For ease of description, the above conditions 1 to 16 can be collectively referred to as a location condition in this application. In some possible implementation, the base station can carry the above location condition together in the measurement relaxation criterion and indicate it to the terminal. In another possible implementation, the above location condition can be directly deployed on the terminal, and in the case that the base station indicates the corresponding reference location and threshold, the terminal can determine whether to perform the measurement relaxation based on the reference location and threshold indicated by the base station and the location condition deployed on the terminal.

[0237] Optionally, the measurement relaxation criterion is further used to indicate first time information, the first time information being used to indicate a time for performing the measurement relaxation.

[0238] That is, the measurement relaxation criterion can be used to indicate the content as indicated in any one of the above implementation A to implementation F, the above implementation A1 to implementation F1, and can be used to indicate the first time information, which can be used to indicate a time at which the terminal performs the measurement relaxation of the RLM, BFD or RRM.

[0239] In a possible implementation, the first time information includes a first time point, the first time point being used to indicate that the measurement relaxation is performed before the first time point.

[0240] Example thirteen, the measurement relaxation criterion can be further used to indicate a first time point t1-Threshold, in the case that the above location condition is met, and before the first time point t1-Threshold, the terminal can perform the measurement relaxation of the RLM, BFD or RRM. That is, in the case that the above location condition is met, the terminal can perform the measurement relaxation of the RLM, BFD or RRM before the first time point t1-Threshold, and after the first time point t1-Threshold, the terminal can not perform the measurement relaxation of the RLM, BFD or RRM. That is, the time Mt at which the terminal performs the measurement relaxation of the RLM, BFD or RRM satisfies: Mt≤t1-Threshold (for ease of description, the condition is recorded as condition 17).

[0241] In practical application scenarios, the value of the first time point t1-Threshold can be coordinated universal time (UTC). For example, the value of the first time point t1-Threshold can be an integer between 0 and 549755813887, where each step can represent 10 ms. For example, when the value of the first time point t1-Threshold is 1, it is equivalent to that the first distance threshold is equal to 10 ms (obtained by 10 ms x 1); when the value of the first time point t1-Threshold is 5, it is equivalent to that the first distance threshold is equal to 50 ms (obtained by 10 ms x 5); when the value of the first time point t1-Threshold is 10, it is equivalent to that the first distance threshold is equal to 100 ms (obtained by 10 ms x 10); and so on. For the sake of brevity, the specific values of the first time point are not described one by one. In practical application scenarios, the specific value of the first time point is not limited in the present application.

[0242] It can be understood that the first time point t1-Threshold is earlier than the time T-service at which the service satellite associated with the NTN service cell stops serving. For example, the service time of the service satellite 1 for the region 1 is 8:00-10:00 (24-hour system), and the first time point t1-Threshold can be a time point earlier than the service end time 10:00 in 8:00-10:00.

[0243] In another possible implementation, the first time information includes a first duration and a second time point, and the first duration and the second time point are used to indicate that the measurement relaxation is performed within the first duration starting from the second time point.

[0244] Example fourteen, the measurement relaxation criterion can also be used to indicate a first duration T-Duration and a second time point t2-Threshold. In the case of meeting the above position condition, the terminal can perform measurement relaxation of RLM, BFD or RRM in the period from the second time point t2-Threshold to t2-Threshold+T-Duration; and before the second time point t2-Threshold, or after t2-Threshold+T-Duration, the terminal can not perform measurement relaxation of RLM, BFD or RRM. That is, the time Mt at which the terminal performs measurement relaxation of RLM, BFD or RRM satisfies: t2-Threshold≤Mt≤t2-Threshold+T-Duration (for the sake of description, the condition is recorded as condition 18).

[0245] It can be understood that the above condition 18 can be transformed into Mt∈[t2-Threshold, t2-Threshold+T-Duration], which is not limited in the present application.

[0246] It can also be understood that t2-Threshold+T-Duration is earlier than the time T-service at which the serving satellite associated with the NTN serving cell stops serving. For example, the service time of the service satellite 1 for the region 1 is 8:00-10:00 (24-hour system), and t2-Threshold+T-Duration can be a time point earlier than the service end time 10:00 in 8:00-10:00.

[0247] In yet another possible implementation, the first time information includes a third time point and a fourth time point, the third time point being earlier than the fourth time point, and the third time point and the fourth time point being used to indicate that the measurement relaxation is performed between the third time point and the fourth time point.

[0248] Example fifteen, the measurement relaxation criterion can also be used to indicate a third time point t3-Threshold and a fourth time point t4-Threshold, and the terminal can relax the measurement of RLM, BFD or RRM between the third time point t3-Threshold and the fourth time point t4-Threshold if the above location condition is met. That is, the time Mt at which the terminal performs the measurement relaxation of RLM, BFD or RRM satisfies: Mt∈[t3-Threshold, t4-Threshold] (for the convenience of description, this condition is recorded as condition 19).

[0249] It can be understood that the above condition 19 can be transformed into t3-Threshold≤Mt≤t4-Threshold, which is not limited in the present application.

[0250] It can also be understood that the fourth time point t4-Threshold is earlier than the time T-service at which the serving satellite associated with the NTN serving cell stops serving. For example, the service time of the service satellite 1 for the region 1 is 8:00-10:00 (24-hour system), and t4-Threshold can be a time point earlier than the service end time 10:00 in 8:00-10:00.

[0251] For ease of description, the above conditions 17 to 19 can be collectively referred to as time conditions. In some possible implementation, the base station can carry the above time conditions together in the measurement relaxation criterion and indicate to the terminal. In another possible implementation, the above time conditions can be directly deployed on the terminal, and the terminal can determine whether to perform measurement relaxation and at what time to perform measurement relaxation based on the reference location, the threshold, the first time information indicated by the base station, and the time conditions deployed on the terminal.

[0252] In the above examples 13 to 15, the detailed description of the terminal performing measurement relaxation of RLM, BFD or RRM on the NTN serving cell, or the terminal performing measurement relaxation of RRM on the neighbor cell, and / or the detailed description of performing measurement relaxation of RRM on the NTN serving cell can refer to the relevant description of measurement relaxation of RRM on the NTN serving cell and the neighbor cell in step 320 above, and will not be repeated here for brevity.

[0253] By combining the first time information, the terminal can determine whether the measurement relaxation criterion is met and determine the time period in which the measurement relaxation is performed according to the time of the terminal with the satellite service, which not only reduces the power consumption of the terminal, but also avoids starting to determine whether the measurement relaxation criterion is met from the start time of the satellite service to the terminal, and improves the effectiveness of measurement relaxation.

[0254] Optionally, the measurement relaxation criterion further indicates first parameter information and / or second parameter information; the first parameter information is used to evaluate whether the serving cell in which the terminal is located meets a good cell service quality criterion or a non-cell edge criterion, the second parameter information is used to evaluate whether the terminal meets a low mobility criterion; and the measurement relaxation of one or more of RLM, BFD or RRM is performed based on the measurement relaxation criterion, including: the measurement relaxation of one or more of RLM, BFD or RRM is performed based on the reference location, and the first parameter information and / or the second parameter information.

[0255] Example 16, the measurement relaxation criterion further indicates the first parameter information. That is, the measurement relaxation criterion can be used to indicate the reference location, the above position-related threshold and / or the above position condition, and can also be used to indicate the first parameter information, and the terminal can determine whether to perform measurement relaxation of RLM, BFD or RRM based on the above position condition and the first parameter information.

[0256] In a possible implementation, for the connected state terminal, the connected state terminal can determine whether the location condition and the good cell service quality criterion are met, in the case that both the location condition and the good cell service quality criterion are met, the connected state terminal can perform measurement relaxation of RLM, BFD or RRM on the NTN serving cell, and / or the connected state terminal can perform measurement relaxation of RRM on the neighbor cell of the NTN serving cell; in the case that only the location condition is met, or only the good cell service quality criterion is met, or neither the location condition nor the good cell service quality criterion is met, the terminal can not perform measurement relaxation of RLM, BFD or RRM.

[0257] For the idle state terminal or the inactive state terminal, the idle state terminal or the inactive state terminal can determine whether the location condition and the non-cell edge criterion are met, in the case that both the location condition and the non-cell edge criterion are met, the idle state terminal or the inactive state terminal can perform measurement relaxation of RRM on the NTN serving cell and / or the neighbor cell; in the case that only the location condition is met, or only the non-cell edge criterion is met, or neither the location condition nor the good cell service quality criterion is met, the idle state terminal or the inactive state terminal can not perform measurement relaxation of RRM on the NTN serving cell and / or the neighbor cell.

[0258] In another possible implementation, for the connected state terminal, in the case that the location condition is met, the connected state terminal starts to evaluate whether the good cell service quality criterion is met based on the first parameter information; in the case that both the location condition and the good cell service quality criterion are met, the connected state terminal can perform measurement relaxation of RLM, BFD or RRM on the NTN serving cell, and / or the connected state terminal can perform measurement relaxation of RRM on the neighbor cell of the NTN serving cell; in the case that only the location condition is met, or only the good cell service quality criterion is met, or neither the location condition nor the good cell service quality criterion is met, the connected state terminal can not perform measurement relaxation of RLM, BFD or RRM.

[0259] For the idle state terminal or the inactive state terminal, in the case that the location condition is met, the idle state terminal or the inactive state terminal starts to evaluate whether the non-cell edge criterion is met based on the first parameter information; in the case that both the location condition and the non-cell edge criterion are met, the idle state terminal or the inactive state terminal can perform measurement relaxation of RRM on the NTN serving cell and / or the neighbor cell; in the case that only the location condition is met, or only the good cell service quality criterion is met, or neither the location condition nor the good cell service quality criterion is met, the idle state terminal or the inactive state terminal can not perform measurement relaxation of RRM on the NTN serving cell and / or the neighbor cell.

[0260] In an example 17, the measurement relaxation criteria can be used to indicate the reference location, the above-mentioned location-related threshold and / or the above-mentioned location condition, and the above-mentioned first time information and / or the above-mentioned time condition, and can be used to indicate the first parameter information, and then the terminal can determine whether to perform the measurement relaxation of RLM, BFD or RRM based on these information.

[0261] In a possible implementation, for the connected terminal, the connected terminal can determine whether the location condition, the time condition and the good cell quality criterion are satisfied, and in the case that all of the three conditions are satisfied, the connected terminal can perform the measurement relaxation of RLM, BFD or RRM on the NTN serving cell, and / or the connected terminal can perform the measurement relaxation of RRM on the neighbor cell of the NTN serving cell; in the case that at least one of the three conditions is not satisfied, the connected terminal can not perform the measurement relaxation of RLM, BFD or RRM.

[0262] For the idle terminal or the inactive terminal, the idle terminal or the inactive terminal can determine whether the location condition, the time condition and the non-cell-edge criterion are satisfied, and in the case that all of the three conditions are satisfied, the idle terminal or the inactive terminal can perform the measurement relaxation of RRM on the NTN serving cell and / or the neighbor cell; in the case that at least one of the three conditions is not satisfied, the idle terminal or the inactive terminal can not perform the measurement relaxation of RRM on the NTN serving cell and / or the neighbor cell.

[0263] In another possible implementation, for the connected terminal, in the case that the time condition is satisfied, the connected terminal starts to determine whether the location condition is satisfied, and assesses whether the good cell quality criterion is satisfied based on the first parameter information. In the case that all of the three conditions are satisfied, the connected terminal can perform the measurement relaxation of RLM, BFD or RRM on the NTN serving cell, and / or the connected terminal can perform the measurement relaxation of RRM on the neighbor cell of the NTN serving cell; in the case that at least one of the three conditions is not satisfied, the connected terminal can not perform the measurement relaxation of RLM, BFD or RRM.

[0264] For the idle terminal or the inactive terminal, in the case that the time condition is satisfied, the idle terminal or the inactive terminal starts to determine whether the location condition is satisfied, and assesses whether the non-cell-edge criterion is satisfied based on the first parameter information. In the case that all of the three conditions are satisfied, the idle terminal or the inactive terminal can perform the measurement relaxation of RRM on the NTN serving cell and / or the neighbor cell; in the case that at least one of the three conditions is not satisfied, the idle terminal or the inactive terminal can not perform the measurement relaxation of RRM on the NTN serving cell and / or the neighbor cell.

[0265] In yet another possible implementation, for a connected terminal, the connected terminal only initiates evaluation of whether the good cell quality of service criterion is met based on the first parameter information if the location condition and the time condition are both satisfied. In a case where all of the three are satisfied, the connected terminal can perform measurement relaxation of RLM, BFD or RRM for the NTN serving cell, and / or the connected terminal can perform measurement relaxation of RRM for a neighbor cell of the NTN serving cell; in a case where at least one of the three is not satisfied, the connected terminal can not perform measurement relaxation of RLM, BFD or RRM.

[0266] For an idle terminal or an inactive terminal, the idle terminal or the inactive terminal only initiates evaluation of whether the non-cell edge criterion is met based on the first parameter information if the location condition and the time condition are both satisfied. In a case where all of the three are satisfied, the idle terminal or the inactive terminal can perform measurement relaxation of RRM for the NTN serving cell and / or a neighbor cell; in a case where at least one of the three is not satisfied, the idle terminal or the inactive terminal can not perform measurement relaxation of RRM for the NTN serving cell and / or the neighbor cell.

[0267] In yet another possible implementation, for a connected terminal, the connected terminal only initiates determination of whether the time condition is met if the location condition and the good cell quality of service criterion are both satisfied. In a case where all of the three are satisfied, the connected terminal can perform measurement relaxation of RLM, BFD or RRM for the NTN serving cell, and / or the connected terminal can perform measurement relaxation of RRM for a neighbor cell of the NTN serving cell; in a case where at least one of the three is not satisfied, the connected terminal can not perform measurement relaxation of RLM, BFD or RRM.

[0268] For an idle terminal or an inactive terminal, the idle terminal or the inactive terminal only initiates determination of whether the time condition is met if the location condition and the non-cell edge criterion are both satisfied. In a case where all of the three are satisfied, the idle terminal or the inactive terminal can perform measurement relaxation of RRM for the NTN serving cell and / or a neighbor cell; in a case where at least one of the three is not satisfied, the idle terminal or the inactive terminal can not perform measurement relaxation of RRM for the NTN serving cell and / or the neighbor cell.

[0269] In yet another possible implementation, for the connected terminal, the connected terminal starts to determine whether the location condition is satisfied only when the time condition and the good cell service quality criterion are satisfied. In a case where all of the three are satisfied, the connected terminal can perform the measurement relaxation of RLM, BFD or RRM on the NTN serving cell, and / or the connected terminal can perform the measurement relaxation of RRM on a neighbor cell of the NTN serving cell; in a case where at least one of the three is not satisfied, the connected terminal can not perform the measurement relaxation of RLM, BFD or RRM.

[0270] For the idle terminal or the inactive terminal, the idle terminal or the inactive terminal starts to determine whether the location condition is satisfied only when the time condition and the non-cell edge criterion are satisfied. In a case where all of the three are satisfied, the idle terminal or the inactive terminal can perform the measurement relaxation of RRM on the NTN serving cell and / or a neighbor cell; in a case where at least one of the three is not satisfied, the idle terminal or the inactive terminal can not perform the measurement relaxation of RRM on the NTN serving cell and / or the neighbor cell.

[0271] Example eighteen, the measurement relaxation criterion is further used to indicate the second parameter information. That is, the measurement relaxation criterion can be used to indicate the reference location, the location-related threshold and / or the location condition, and can also be used to indicate the second parameter information, and the terminal can determine whether to perform the measurement relaxation of RLM, BFD or RRM based on the location condition and the second parameter information.

[0272] In a possible implementation, for the connected terminal, the connected terminal can determine whether the location condition and the low mobility criterion are satisfied, in a case where both the location condition and the low mobility criterion are satisfied, the connected terminal can perform the measurement relaxation of RLM, BFD or RRM on the NTN serving cell, and / or the connected terminal can perform the measurement relaxation of RRM on a neighbor cell of the NTN serving cell; in a case where only the location condition is satisfied, or only the low mobility criterion is satisfied, or neither the location condition nor the low mobility criterion is satisfied, the connected terminal can not perform the measurement relaxation of RLM, BFD or RRM.

[0273] For the idle state terminal or the inactive state terminal, the idle state terminal or the inactive state terminal can determine whether the location condition and the low mobility criterion are met, in the case that both the location condition and the low mobility criterion are met, the idle state terminal or the inactive state terminal can perform the measurement relaxation of the RRM of the NTN serving cell and / or the neighbor cell; in the case that only the location condition is met, or only the low mobility criterion is met, or neither the location condition nor the low mobility criterion is met, the idle state terminal or the inactive state terminal can not perform the measurement relaxation of the RRM of the NTN serving cell and / or the neighbor cell.

[0274] In another possible implementation, for the connected state terminal, in the case that the location condition is met, the connected state terminal starts to evaluate whether the low mobility criterion is met based on the second parameter information; in the case that both the location condition and the low mobility criterion are met, the connected state terminal can perform the measurement relaxation of the RLM, the BFD or the RRM of the NTN serving cell, and / or, the connected state terminal can perform the measurement relaxation of the RRM of the neighbor cell of the NTN serving cell; in the case that only the location condition is met, or only the low mobility criterion is met, or neither the location condition nor the low mobility criterion is met, the connected state terminal can not perform the measurement relaxation of the RLM, the BFD or the RRM.

[0275] For the idle state terminal or the inactive state terminal, in the case that the location condition is met, the idle state terminal or the inactive state terminal starts to evaluate whether the low mobility criterion is met based on the second parameter information; in the case that both the location condition and the low mobility criterion are met, the idle state terminal or the inactive state terminal can perform the measurement relaxation of the RRM of the NTN serving cell and / or the neighbor cell; in the case that only the location condition is met, or only the low mobility criterion is met, or neither the location condition nor the low mobility criterion is met, the idle state terminal or the inactive state terminal can not perform the measurement relaxation of the RRM of the NTN serving cell and / or the neighbor cell.

[0276] Example nineteen, the measurement relaxation criterion can be used to indicate the reference location, the above-mentioned location-related threshold and / or the above-mentioned location condition, and the above-mentioned first time information and / or the above-mentioned time condition, and can be used to indicate the second parameter information, and then the terminal can determine whether to perform the measurement relaxation of the RLM, the BFD or the RRM based on these information.

[0277] In a possible implementation, for the connected terminal, the connected terminal can determine whether the location condition, the time condition and the low mobility criterion are satisfied, in the case that all of the three are satisfied, the connected terminal can perform measurement relaxation of RLM, BFD or RRM on the NTN serving cell, and / or, the connected terminal can perform measurement relaxation of RRM on the neighbor cell of the NTN serving cell; in the case that at least one of the three is not satisfied, the connected terminal can not perform measurement relaxation of RLM, BFD or RRM.

[0278] For the idle terminal or the inactive terminal, the idle terminal or the inactive terminal can determine whether the location condition, the time condition and the low mobility criterion are satisfied, in the case that all of the three are satisfied, the idle terminal or the inactive terminal can perform measurement relaxation of RRM on the NTN serving cell and / or the neighbor cell; in the case that at least one of the three is not satisfied, the connected terminal can not perform measurement relaxation of RRM on the NTN serving cell and / or the neighbor cell.

[0279] In another possible implementation, for the connected terminal, in the case that the time condition is satisfied, the connected terminal starts to determine whether the location condition is satisfied, and assesses whether the low mobility criterion is satisfied based on the second parameter information. In the case that all of the three are satisfied, the connected terminal can perform measurement relaxation of RLM, BFD or RRM on the NTN serving cell, and / or, the connected terminal can perform measurement relaxation of RRM on the neighbor cell of the NTN serving cell; in the case that at least one of the three is not satisfied, the connected terminal can not perform measurement relaxation of RLM, BFD or RRM.

[0280] For the idle terminal or the inactive terminal, in the case that the time condition is satisfied, the idle terminal or the inactive terminal starts to determine whether the location condition is satisfied, and assesses whether the low mobility criterion is satisfied based on the second parameter information. In the case that all of the three are satisfied, the idle terminal or the inactive terminal can perform measurement relaxation of RRM on the NTN serving cell and / or the neighbor cell; in the case that at least one of the three is not satisfied, the idle terminal or the inactive terminal can not perform measurement relaxation of RRM on the NTN serving cell and / or the neighbor cell.

[0281] In yet another possible implementation, for the connected terminal, the connected terminal only initiates the evaluation of whether the low mobility criterion is met based on the second parameter information in the case that the location condition and the time condition are both met. In the case that all of the three are met, the connected terminal can perform the measurement relaxation of RLM, BFD or RRM on the NTN serving cell, and / or, the connected terminal can perform the measurement relaxation of RRM on the neighbor cell of the NTN serving cell; in the case that at least one of the three is not met, the connected terminal can not perform the measurement relaxation of RLM, BFD or RRM.

[0282] For the idle terminal or the inactive terminal, the idle terminal or the inactive terminal only initiates the evaluation of whether the low mobility criterion is met based on the second parameter information in the case that the location condition and the time condition are both met. In the case that all of the three are met, the idle terminal or the inactive terminal can perform the measurement relaxation of RRM on the NTN serving cell and / or the neighbor cell; in the case that at least one of the three is not met, the idle terminal or the inactive terminal can not perform the measurement relaxation of RRM on the NTN serving cell and / or the neighbor cell.

[0283] In yet another possible implementation, for the connected terminal, the connected terminal only initiates the judgment of whether the time condition is met in the case that the location condition and the low mobility criterion are both met. In the case that all of the three are met, the connected terminal can perform the measurement relaxation of RLM, BFD or RRM on the NTN serving cell, and / or, the connected terminal can perform the measurement relaxation of RRM on the neighbor cell of the NTN serving cell; in the case that at least one of the three is not met, the connected terminal can not perform the measurement relaxation of RLM, BFD or RRM.

[0284] For the idle terminal or the inactive terminal, the idle terminal or the inactive terminal only initiates the judgment of whether the time condition is met in the case that the location condition and the low mobility criterion are both met. In the case that all of the three are met, the idle terminal or the inactive terminal can perform the measurement relaxation of RRM on the NTN serving cell and / or the neighbor cell; in the case that at least one of the three is not met, the idle terminal or the inactive terminal can not perform the measurement relaxation of RRM on the NTN serving cell and / or the neighbor cell.

[0285] In yet another possible implementation, for a connected terminal, the connected terminal can start to judge whether the location condition is satisfied only when the time condition and the low mobility criterion are satisfied. In a case where all of the three are satisfied, the connected terminal can perform the measurement relaxation of RLM, BFD or RRM on the NTN serving cell, and / or the connected terminal can perform the measurement relaxation of RRM on a neighbor cell of the NTN serving cell; in a case where at least one of the three is not satisfied, the connected terminal can not perform the measurement relaxation of RLM, BFD or RRM.

[0286] For an idle terminal or an inactive terminal, the idle terminal or the inactive terminal can start to judge whether the location condition is satisfied only when the time condition and the low mobility are satisfied. In a case where all of the three are satisfied, the idle terminal or the inactive terminal can perform the measurement relaxation of RRM on the NTN serving cell and / or a neighbor cell; in a case where at least one of the three is not satisfied, the idle terminal or the inactive terminal can not perform the measurement relaxation of RRM on the NTN serving cell and / or the neighbor cell.

[0287] In Example Twenty, the measurement relaxation criterion can be used to indicate the reference location, the location-related threshold and / or the location condition, and can also be used to indicate the first parameter information and the second parameter information, and then the terminal can determine whether to perform the measurement relaxation of RLM, BFD or RRM based on the information.

[0288] In a possible implementation, for a connected terminal, the connected terminal can judge whether the location condition, the good cell quality criterion and the low mobility criterion are satisfied, in a case where all of the three are satisfied, the connected terminal can perform the measurement relaxation of RLM, BFD or RRM on the NTN serving cell, and / or the connected terminal can perform the measurement relaxation of RRM on a neighbor cell of the NTN serving cell; in a case where at least one of the three is not satisfied, the connected terminal can not perform the measurement relaxation of RLM, BFD or RRM.

[0289] For an idle terminal or an inactive terminal, the idle terminal or the inactive terminal can judge whether the location condition, the non-cell edge criterion and the low mobility criterion are satisfied, in a case where all of the three are satisfied, the idle terminal or the inactive terminal can perform the measurement relaxation of RRM on the NTN serving cell and / or a neighbor cell; in a case where at least one of the three is not satisfied, the idle terminal or the inactive terminal can not perform the measurement relaxation of RRM on the NTN serving cell and / or the neighbor cell.

[0290] In another possible implementation, for a connected terminal, the connected terminal only initiates evaluation of whether the good cell service quality criterion is met based on the first parameter information and evaluation of whether the low mobility criterion is met based on the second parameter information, in a case where the location condition is met. In a case where all of the three are met, the connected terminal can perform measurement relaxation of RLM, BFD or RRM on the NTN serving cell, and / or the connected terminal can perform measurement relaxation of RRM on a neighbor cell of the NTN serving cell; in a case where at least one of the three is not met, the connected terminal can not perform measurement relaxation of RLM, BFD or RRM.

[0291] For an idle terminal or an inactive terminal, the idle terminal or the inactive terminal only initiates evaluation of whether the non-cell edge criterion is met based on the first parameter information and evaluation of whether the low mobility criterion is met based on the second parameter information, in a case where the location condition is met. In a case where all of the three are met, the idle terminal or the inactive terminal can perform measurement relaxation of RRM on the NTN serving cell and / or a neighbor cell; in a case where at least one of the three is not met, the idle terminal or the inactive terminal can not perform measurement relaxation of RRM on the NTN serving cell and / or the neighbor cell.

[0292] In another possible implementation, for a connected terminal, the connected terminal only initiates evaluation of whether the low mobility criterion is met based on the second parameter information, in a case where the location condition and the good cell service quality criterion are met. In a case where all of the three are met, the connected terminal can perform measurement relaxation of RLM, BFD or RRM on the NTN serving cell, and / or the connected terminal can perform measurement relaxation of RRM on a neighbor cell of the NTN serving cell; in a case where at least one of the three is not met, the connected terminal can not perform measurement relaxation of RLM, BFD or RRM.

[0293] For an idle terminal or an inactive terminal, the idle terminal or the inactive terminal only initiates evaluation of whether the low mobility criterion is met based on the second parameter information, in a case where the location condition and the non-cell edge criterion are met. In a case where all of the three are met, the idle terminal or the inactive terminal can perform measurement relaxation of RRM on the NTN serving cell and / or a neighbor cell; in a case where at least one of the three is not met, the idle terminal or the inactive terminal can not perform measurement relaxation of RRM on the NTN serving cell and / or the neighbor cell.

[0294] In yet another possible implementation, for a connected terminal, the connected terminal can determine whether the location condition, the time condition, the good cell service quality criterion and the low mobility criterion are all satisfied, and in the case where all the four are satisfied, the connected terminal can perform the measurement relaxation of RLM, BFD or RRM for the NTN serving cell, and / or the connected terminal can perform the measurement relaxation of RRM for a neighbor cell of the NTN serving cell; in the case where at least one of the four is not satisfied, the connected terminal can not perform the measurement relaxation of RLM, BFD or RRM.

[0295] For an idle terminal or an inactive terminal, the idle terminal or the inactive terminal can determine whether the location condition, the time condition, the non-cell edge criterion and the low mobility criterion are all satisfied, and in the case where all the four are satisfied, the idle terminal or the inactive terminal can perform the measurement relaxation of RRM for the NTN serving cell and / or a neighbor cell; in the case where at least one of the four is not satisfied, the idle terminal or the inactive terminal can not perform the measurement relaxation of RRM for the NTN serving cell and / or a neighbor cell.

[0296] Example twenty-one, the measurement relaxation criterion can be used to indicate the reference location, the aforementioned location-related threshold and / or the aforementioned location condition, and the aforementioned first time information and / or time condition, and can also be used to indicate the first parameter information and the second parameter information, and then the terminal can determine whether to perform the measurement relaxation of RLM, BFD or RRM based on these information.

[0297] In a possible implementation, for a connected terminal, the connected terminal can determine whether the location condition, the time condition, the good cell service quality criterion and the low mobility criterion are all satisfied, and in the case where all the four are satisfied, the connected terminal can perform the measurement relaxation of RLM, BFD or RRM for the NTN serving cell, and / or the connected terminal can perform the measurement relaxation of RRM for a neighbor cell of the NTN serving cell; in the case where at least one of the four is not satisfied, the connected terminal can not perform the measurement relaxation of RLM, BFD or RRM.

[0298] For an idle terminal or an inactive terminal, the idle terminal or the inactive terminal can determine whether the location condition, the time condition, the non-cell edge criterion and the low mobility criterion are all satisfied, and in the case where all the four are satisfied, the idle terminal or the inactive terminal can perform the measurement relaxation of RRM for the NTN serving cell and / or a neighbor cell; in the case where at least one of the four is not satisfied, the idle terminal or the inactive terminal can not perform the measurement relaxation of RRM for the NTN serving cell and / or a neighbor cell.

[0299] In another possible implementation, for the connected terminal, in the case that the above-mentioned location condition is met, the connected terminal only starts to evaluate whether the good cell service quality criterion is met based on the first parameter information, and whether the low mobility criterion is met based on the second parameter information, and whether the above-mentioned time condition is met. In the case that all of the four are met, the connected terminal can perform the measurement relaxation of RLM, BFD or RRM on the NTN serving cell, and / or the connected terminal can perform the measurement relaxation of RRM on the neighbor cell of the NTN serving cell; in the case that at least one of the four is not met, the connected terminal can not perform the measurement relaxation of RLM, BFD or RRM.

[0300] For the idle terminal or the inactive terminal, in the case that the above-mentioned location condition is met, the idle terminal or the inactive terminal only starts to evaluate whether the non-cell edge criterion is met based on the first parameter information, and whether the low mobility criterion is met based on the second parameter information, and whether the above-mentioned time condition is met. In the case that all of the four are met, the idle terminal or the inactive terminal can perform the measurement relaxation of RRM on the NTN serving cell and / or the neighbor cell; in the case that at least one of the four is not met, the idle terminal or the inactive terminal can not perform the measurement relaxation of RRM on the NTN serving cell and / or the neighbor cell.

[0301] In another possible implementation, for the connected terminal, in the case that the above-mentioned time condition is met, the connected terminal only starts to evaluate whether the good cell service quality criterion is met based on the first parameter information, and whether the low mobility criterion is met based on the second parameter information, and whether the above-mentioned location condition is met. In the case that all of the four are met, the connected terminal can perform the measurement relaxation of RLM, BFD or RRM on the NTN serving cell, and / or the connected terminal can perform the measurement relaxation of RRM on the neighbor cell of the NTN serving cell; in the case that at least one of the four is not met, the connected terminal can not perform the measurement relaxation of RLM, BFD or RRM.

[0302] For the idle state terminal or the inactive state terminal, in the case that the above-mentioned location condition and time condition are satisfied, the idle state terminal or the inactive state terminal starts to evaluate whether the non-cell edge criterion is satisfied based on the first parameter information, and whether the low mobility criterion is satisfied based on the second parameter information, and whether the above-mentioned location condition is satisfied. In the case that all the four conditions are satisfied, the idle state terminal or the inactive state terminal can perform the measurement relaxation of the RRM of the NTN serving cell and / or the neighbor cell; in the case that at least one of the four conditions is not satisfied, the idle state terminal or the inactive state terminal can not perform the measurement relaxation of the RRM of the NTN serving cell and / or the neighbor cell.

[0303] In yet another possible implementation, for the connected state terminal, in the case that the above-mentioned location condition and good cell service quality criterion are satisfied, the connected state terminal starts to evaluate whether the low mobility criterion is satisfied based on the second parameter information, and whether the above-mentioned time condition is satisfied. In the case that all the four conditions are satisfied, the connected state terminal can perform the measurement relaxation of the RLM, BFD or RRM of the NTN serving cell, and / or, the connected state terminal can perform the measurement relaxation of the RRM of the neighbor cell of the NTN serving cell; in the case that at least one of the four conditions is not satisfied, the connected state terminal can not perform the measurement relaxation of the RLM, BFD or RRM.

[0304] For the idle state terminal or the inactive state terminal, in the case that the above-mentioned location condition and time condition are satisfied, the idle state terminal or the inactive state terminal starts to evaluate whether the non-cell edge criterion is satisfied based on the first parameter information, and whether the low mobility criterion is satisfied based on the second parameter information, and whether the above-mentioned location condition is satisfied. In the case that all the four conditions are satisfied, the idle state terminal or the inactive state terminal can perform the measurement relaxation of the RRM of the NTN serving cell and / or the neighbor cell; in the case that at least one of the four conditions is not satisfied, the idle state terminal or the inactive state terminal can not perform the measurement relaxation of the RRM of the NTN serving cell and / or the neighbor cell.

[0305] In yet another possible implementation, for the connected state terminal, in the case that the above-mentioned location condition and good cell service quality criterion are satisfied, the connected state terminal starts to evaluate whether the low mobility criterion is satisfied based on the second parameter information, and whether the above-mentioned time condition is satisfied. In the case that all the four conditions are satisfied, the connected state terminal can perform the measurement relaxation of the RLM, BFD or RRM of the NTN serving cell, and / or, the connected state terminal can perform the measurement relaxation of the RRM of the neighbor cell of the NTN serving cell; in the case that at least one of the four conditions is not satisfied, the connected state terminal can not perform the measurement relaxation of the RLM, BFD or RRM.

[0306] For the idle state terminal or the inactive state terminal, in the case that the location condition and the non-cell edge criterion are satisfied, the idle state terminal or the inactive state terminal starts to evaluate whether the low mobility criterion is satisfied based on the second parameter information, and judges whether the time condition is satisfied. In the case that all the four are satisfied, the idle state terminal or the inactive state terminal can perform the measurement relaxation of the RRM of the NTN serving cell and / or the neighbor cell; in the case that at least one of the four is not satisfied, the idle state terminal or the inactive state terminal can not perform the measurement relaxation of the RRM of the NTN serving cell and / or the neighbor cell.

[0307] In yet another possible implementation, for the connected state terminal, in the case that the time condition and the good cell service quality criterion are satisfied, the connected state terminal starts to evaluate whether the low mobility criterion is satisfied based on the second parameter information, and judges whether the location condition is satisfied. In the case that all the four are satisfied, the connected state terminal can perform the measurement relaxation of the RLM, the BFD or the RRM of the NTN serving cell, and / or the connected state terminal can perform the measurement relaxation of the RRM of the neighbor cell of the NTN serving cell; in the case that at least one of the four is not satisfied, the connected state terminal can not perform the measurement relaxation of the RLM, the BFD or the RRM.

[0308] For the idle state terminal or the inactive state terminal, in the case that the location condition and the low mobility criterion are satisfied, the idle state terminal or the inactive state terminal starts to evaluate whether the non-cell edge criterion is satisfied based on the first parameter information, and judges whether the time condition is satisfied. In the case that all the four are satisfied, the idle state terminal or the inactive state terminal can perform the measurement relaxation of the RRM of the NTN serving cell and / or the neighbor cell; in the case that at least one of the four is not satisfied, the idle state terminal or the inactive state terminal can not perform the measurement relaxation of the RRM of the NTN serving cell and / or the neighbor cell.

[0309] In yet another possible implementation, for the connected state terminal, in the case that the time condition and the good cell service quality criterion are satisfied, the connected state terminal starts to evaluate whether the low mobility criterion is satisfied based on the second parameter information, and judges whether the location condition is satisfied. In the case that all the four are satisfied, the connected state terminal can perform the measurement relaxation of the RLM, the BFD or the RRM of the NTN serving cell, and / or the connected state terminal can perform the measurement relaxation of the RRM of the neighbor cell of the NTN serving cell; in the case that at least one of the four is not satisfied, the connected state terminal can not perform the measurement relaxation of the RLM, the BFD or the RRM.

[0310] For the idle state terminal or the inactive state terminal, in the case that the time condition and the non-cell edge criterion are satisfied, the idle state terminal or the inactive state terminal starts to evaluate whether the low mobility criterion is satisfied based on the second parameter information, and judges whether the location condition is satisfied. In the case that all the four are satisfied, the idle state terminal or the inactive state terminal can perform the measurement relaxation of the RRM of the NTN serving cell and / or the neighbor cell; in the case that at least one of the four is not satisfied, the idle state terminal or the inactive state terminal can not perform the measurement relaxation of the RRM of the NTN serving cell and / or the neighbor cell.

[0311] In yet another possible implementation, for the connected state terminal, in the case that the location condition, the time condition and the good cell service quality criterion are satisfied, the connected state terminal starts to evaluate whether the low mobility criterion is satisfied based on the first parameter information. In the case that all the four are satisfied, the connected state terminal can perform the measurement relaxation of the RLM, the BFD or the RRM of the NTN serving cell, and / or the connected state terminal can perform the measurement relaxation of the RRM of the neighbor cell of the NTN serving cell; in the case that at least one of the four is not satisfied, the connected state terminal can not perform the measurement relaxation of the RLM, the BFD or the RRM.

[0312] For the idle state terminal or the inactive state terminal, in the case that the time condition and the low mobility criterion are satisfied, the idle state terminal or the inactive state terminal starts to evaluate whether the non-cell edge criterion is satisfied based on the first parameter information, and judges whether the location condition is satisfied. In the case that all the four are satisfied, the idle state terminal or the inactive state terminal can perform the measurement relaxation of the RRM of the NTN serving cell and / or the neighbor cell; in the case that at least one of the four is not satisfied, the idle state terminal or the inactive state terminal can not perform the measurement relaxation of the RRM of the NTN serving cell and / or the neighbor cell.

[0313] In yet another possible implementation, for the connected state terminal, in the case that the location condition, the time condition and the good cell service quality criterion are satisfied, the connected state terminal starts to evaluate whether the low mobility criterion is satisfied based on the second parameter information. In the case that all the four are satisfied, the connected state terminal can perform the measurement relaxation of the RLM, the BFD or the RRM of the NTN serving cell, and / or the connected state terminal can perform the measurement relaxation of the RRM of the neighbor cell of the NTN serving cell; in the case that at least one of the four is not satisfied, the connected state terminal can not perform the measurement relaxation of the RLM, the BFD or the RRM.

[0314] For the idle state terminal or the inactive state terminal, in the case that the above location condition, the above time condition and the non-cell-edge criterion are satisfied, the idle state terminal or the inactive state terminal starts to evaluate whether the low mobility criterion is satisfied based on the second parameter information. In the case that all of the four are satisfied, the idle state terminal or the inactive state terminal can perform measurement relaxation of RRM of the neighbor cell of the NTN serving cell; in the case that at least one of the four is not satisfied, the idle state terminal or the inactive state terminal can not perform measurement relaxation of RRM of the NTN serving cell and / or the neighbor cell.

[0315] In yet another possible implementation, for the connected state terminal, in the case that the above location condition, the above time condition and the low mobility criterion are satisfied, the connected state terminal starts to evaluate whether the good cell quality of service criterion is satisfied based on the first parameter information. In the case that all of the four are satisfied, the connected state terminal can perform measurement relaxation of RLM, BFD or RRM of the NTN serving cell, and / or, the connected state terminal can perform measurement relaxation of RRM of the neighbor cell of the NTN serving cell; in the case that at least one of the four is not satisfied, the connected state terminal can not perform measurement relaxation of RLM, BFD or RRM.

[0316] For the idle state terminal or the inactive state terminal, in the case that the above location condition, the above time condition and the low mobility criterion are satisfied, the idle state terminal or the inactive state terminal starts to evaluate whether the non-cell-edge criterion is satisfied based on the first parameter information. In the case that all of the four are satisfied, the idle state terminal or the inactive state terminal can perform measurement relaxation of RRM of the NTN serving cell and / or the neighbor cell; in the case that at least one of the four is not satisfied, the idle state terminal or the inactive state terminal can not perform measurement relaxation of RRM of the NTN serving cell and / or the neighbor cell.

[0317] Optionally, the terminal reports a measurement relaxation state of one or more of RLM, BFD or RRM.

[0318] The measurement relaxation state can be understood as whether a measurement relaxation criterion is satisfied.

[0319] By way of example but not limitation, the terminal can report the measurement relaxation state to the base station through the first assistance information, i.e., the measurement relaxation state can be carried in the first assistance information.

[0320] By way of example and not limitation, 1 can be used to indicate that the measurement relaxation criterion is met or the terminal is in the measurement relaxation state or performs the measurement relaxation, and 0 can be used to indicate that the measurement relaxation criterion is not met or the terminal is not in the measurement relaxation state or does not perform the measurement relaxation. The present application does not limit this. Alternatively, the terminal can report a Boolean (bool) variable to the base station, and "true" can indicate that measurement relaxation for RLM needs to be performed, and "false" can indicate that measurement relaxation for RLM is not performed.

[0321] For example, for RLM, the terminal reports the value of the Boolean variable for the NTN serving cell to the base station as "true" to inform the base station that the terminal needs to perform measurement relaxation for RLM for the NTN serving cell; and the terminal reports the value of the Boolean variable for the NTN serving cell to the base station as "false" to inform the base station that the terminal does not perform measurement relaxation for RLM for the NTN serving cell.

[0322] For example, for BFD, the terminal reports the value of the Boolean variable for the NTN serving cell to the base station as "true" to inform the base station that the terminal needs to perform measurement relaxation for BFD for the NTN serving cell; and the terminal reports the value of the Boolean variable for the NTN serving cell to the base station as "false" to inform the base station that the terminal does not perform measurement relaxation for BFD for the NTN serving cell.

[0323] For example, for RRM, the terminal reports the value of the Boolean variable to the base station as "true" to inform the base station that the terminal needs to perform measurement relaxation for RRM or RRM measurement relaxation conditions; and the terminal reports the value of the Boolean variable to the base station as "false" to inform the base station that the terminal does not perform measurement relaxation for RRM or does not meet the RRM measurement relaxation conditions.

[0324] In one possible implementation, the terminal can first report to the base station that measurement relaxation needs to be performed, and then report that measurement relaxation does not need to be performed (or exited) if the condition is not met. The embodiments of the present application do not limit this.

[0325] Exemplarily, in the case that the terminal is a connected terminal, in the case that the terminal satisfies the measurement relaxation criterion, or in the case that the terminal satisfies the condition of performing measurement relaxation on RLM, BFD or RRM, the terminal can report to the base station that it satisfies the measurement relaxation criterion; in the case that the terminal does not satisfy the measurement relaxation criterion, or in the case that the terminal does not satisfy the condition of performing measurement relaxation on RLM, BFD or RRM, the terminal can report to the base station that it does not satisfy the measurement relaxation criterion, or the terminal can not report to the base station whether it satisfies the measurement relaxation criterion. For the convenience of description, this content is recorded as the reporting condition in the present application. In a possible implementation manner, the reporting condition can be directly deployed on the terminal. In another possible implementation manner, the base station indicates the reporting condition to the terminal. The present application does not make any limitation in this regard.

[0326] Optionally, in addition to being used to indicate one or more of the reference location, the location-related threshold, the location condition, the first time information, the time condition, the first parameter information and the second parameter information, the measurement relaxation criterion can also be used to indicate the case in which the terminal performs measurement relaxation on RLM, BFD or RRM, and / or whether the terminal needs to report the measurement relaxation state to the base station. In the case that the base station indicates that the terminal needs to report the measurement relaxation state, the terminal can report to the base station that it needs to perform or not perform (or exit) measurement relaxation on RLM, BFD or RRM. In the case that the base station does not indicate that the terminal needs to report the measurement relaxation state, the terminal can report or not report the measurement relaxation state, in which case whether to report the measurement relaxation state depends on the configuration information on the terminal itself, that is, if the terminal is configured to need to report the measurement relaxation state, the terminal can report the measurement relaxation state to the base station; if the terminal is configured not to need to report the measurement relaxation state, or if the terminal is not configured whether to need to report the measurement relaxation state, the terminal can not report the measurement relaxation state.

[0327] For example, the base station can indicate to the terminal through the measurement relaxation criterion that the terminal can perform measurement relaxation on RLM, BFD or RRM in the case that the reference location, the location-related threshold, the first time information, and the location condition and the time condition are satisfied, and the terminal needs to report the measurement relaxation state to the base station. That is, in the case that the location condition and the time condition are both satisfied, the terminal can perform measurement relaxation on RLM, BFD or RRM and report to the base station that it needs to perform measurement relaxation on RLM, BFD or RRM; in the case that only the location condition is satisfied or only the time condition is satisfied, the terminal can not perform measurement relaxation on RLM, BFD or RRM and report to the base station that it does not perform (or exits) measurement relaxation on RLM, BFD or RRM.

[0328] For another example, the base station can indicate to the terminal, by the measurement relaxation criteria, the above-mentioned reference location, the threshold related to the location, the first time information, and in the case that the location condition or the time condition is satisfied (i.e., not necessarily both the location condition and the time condition are satisfied at the same time), the terminal can perform the measurement relaxation of RLM, BFD or RRM, and the terminal needs to report to the base station the measurement relaxation status. That is, in the case that only the location condition is satisfied, the terminal can perform the measurement relaxation of RLM, BFD or RRM, and report to the base station that the terminal needs to perform the measurement relaxation of RLM, BFD or RRM; in the case that only the time condition is satisfied, the terminal can perform the measurement relaxation of RLM, BFD or RRM, and report to the base station that the terminal needs to perform the measurement relaxation of RLM, BFD or RRM. In the case that neither the location condition nor the time condition is satisfied, the terminal can not perform the measurement relaxation of RLM, BFD or RRM, and report to the base station that the measurement relaxation of RLM, BFD or RRM is not performed (or exited).

[0329] For another example, the base station can indicate to the terminal, by the measurement relaxation criteria, the reference location, the location-related threshold, the first time information, and that the terminal can perform the measurement relaxation of RLM, BFD or RRM in case of satisfying the location condition (i.e., it is not necessary to satisfy both the location condition and the time condition at the same time, i.e., the location condition is a necessary condition and the time condition is a non-necessary condition), and that the terminal needs to report the measurement relaxation status to the base station. That is, in case of satisfying only the location condition, the terminal can perform the measurement relaxation of RLM, BFD or RRM and report to the base station that the terminal needs to perform the measurement relaxation of RLM, BFD or RRM; in case of satisfying only the time condition, or in case of neither satisfying the location condition nor the time condition, the terminal can not perform the measurement relaxation of RLM, BFD or RRM and report to the base station that the measurement relaxation of RLM, BFD or RRM is not performed (or exited). For another example, the base station can indicate to the terminal, by the measurement relaxation criteria, the reference location, the location-related threshold, the first time information, and that the terminal can perform the measurement relaxation of RLM, BFD or RRM in case of satisfying the time condition (i.e., it is not necessary to satisfy both the location condition and the time condition at the same time, i.e., the time condition is a necessary condition and the location condition is a non-necessary condition), and that the terminal needs to report the measurement relaxation status to the base station. That is, in case of satisfying only the time condition, the terminal can perform the measurement relaxation of RLM, BFD or RRM and report to the base station that the terminal needs to perform the measurement relaxation of RLM, BFD or RRM; in case of satisfying only the location condition, or in case of neither satisfying the location condition nor the time condition, the terminal can not perform the measurement relaxation of RLM, BFD or RRM and report to the base station that the measurement relaxation of RLM, BFD or RRM is not performed (or exited).

[0330] For another example, the base station can indicate to the terminal, by the measurement relaxation criteria, the reference location, the location-related threshold, the first parameter information, and that the terminal can perform the measurement relaxation of RLM, BFD or RRM in case that the location condition is met, the good cell quality criterion is met, or the non-cell edge criterion is met; or that the terminal starts to evaluate whether the good cell quality criterion or the non-cell edge criterion is met based on the first parameter information only in case that the location condition is met, and that the terminal can perform the measurement relaxation of RLM, BFD or RRM in case that the location condition is met, the good cell quality criterion is met, or the non-cell edge criterion is met. That is, the terminal does not perform the measurement relaxation of RLM, BFD or RRM in case that only the location condition is met, or only the good cell quality criterion or the non-cell edge criterion is met. In this example, the base station does not indicate whether the terminal needs to report the measurement relaxation status to the base station, and the terminal can report the measurement relaxation status or not, depending on the terminal's own configuration.

[0331] For another example, the base station can indicate to the terminal, by the measurement relaxation criteria, the reference location, the location-related threshold, the first parameter information, and that the terminal can perform the measurement relaxation of RLM, BFD or RRM in case that the location condition is met, or the good cell quality criterion or the non-cell edge criterion is met (not necessarily both the location condition and the good cell quality criterion or the non-cell edge criterion are met), and that the terminal needs to report the measurement relaxation status to the base station. That is, the terminal can perform the measurement relaxation of RLM, BFD or RRM and report to the base station that the terminal needs to perform the measurement relaxation of RLM, BFD or RRM in case that only the location condition is met; the terminal can perform the measurement relaxation of RLM, BFD or RRM and report to the base station that the terminal needs to perform the measurement relaxation of RLM, BFD or RRM in case that only the good cell quality criterion or the non-cell edge criterion is met. The terminal can not perform the measurement relaxation of RLM, BFD or RRM and report to the base station that the terminal does not perform (or exits from) the measurement relaxation of RLM, BFD or RRM in case that neither the location condition nor the good cell quality criterion or the non-cell edge criterion is met.

[0332] For another example, the base station can indicate to the terminal, by the measurement relaxation criteria, the reference location, the location related threshold, the first parameter information, and that the terminal can perform the measurement relaxation of RLM, BFD or RRM in case of satisfying the good cell service quality criteria or the non-cell edge criteria (i.e., not necessarily in case of simultaneously satisfying the location condition and the good cell service quality criteria or the non-cell edge criteria, that is, the good cell service quality criteria or the non-cell edge criteria is a necessary condition, and the location condition is a non-necessary condition), and that the terminal needs to report the measurement relaxation status to the base station. That is, in case of only satisfying the good cell service quality criteria or the non-cell edge criteria, the terminal can perform the measurement relaxation of RLM, BFD or RRM, and report to the base station that the terminal needs to perform the measurement relaxation of RLM, BFD or RRM; in case of only satisfying the location condition, or in case of neither satisfying the location condition nor satisfying the good cell service quality criteria or the non-cell edge criteria, the terminal can not perform the measurement relaxation of RLM, BFD or RRM, and report to the base station that the measurement relaxation of RLM, BFD or RRM is not performed (or exited).

[0333] For another example, the base station can indicate to the terminal, by the measurement relaxation criteria, the reference location, the location related threshold, the first parameter information, and that the terminal can perform the measurement relaxation of RLM, BFD or RRM in case of satisfying the good cell service quality criteria or the non-cell edge criteria (i.e., not necessarily in case of simultaneously satisfying the location condition and the good cell service quality criteria or the non-cell edge criteria, that is, the good cell service quality criteria or the non-cell edge criteria is a necessary condition, and the location condition is a non-necessary condition), and that the terminal needs to report the measurement relaxation status to the base station. That is, in case of only satisfying the good cell service quality criteria or the non-cell edge criteria, the terminal can perform the measurement relaxation of RLM, BFD or RRM, and report to the base station that the terminal needs to perform the measurement relaxation of RLM, BFD or RRM; in case of only satisfying the location condition, or in case of neither satisfying the location condition nor satisfying the good cell service quality criteria or the non-cell edge criteria, the terminal can not perform the measurement relaxation of RLM, BFD or RRM, and report to the base station that the measurement relaxation of RLM, BFD or RRM is not performed (or exited).

[0334] For example, the base station can indicate to the terminal, by the measurement relaxation criteria, the reference location, the location related threshold, the second parameter information, and the terminal can perform the measurement relaxation of RLM, BFD or RRM in the case that the location condition and the low mobility criterion are met, and the terminal needs to report the measurement relaxation status to the base station. Alternatively, the terminal starts to evaluate whether the low mobility criterion is met based on the second parameter information in the case that the location condition is met, and the terminal can perform the measurement relaxation of RLM, BFD or RRM in the case that the location condition and the low mobility criterion are met, and the terminal needs to report the measurement relaxation status to the base station. That is, in the case that the location condition and the low mobility criterion are met, the terminal can perform the measurement relaxation of RLM, BFD or RRM and report to the base station that the measurement relaxation of RLM, BFD or RRM needs to be performed; in the case that only the location condition is met, or only the low mobility criterion is met, the terminal does not perform the measurement relaxation of RLM, BFD or RRM and reports that the measurement relaxation of RLM, BFD or RRM is not performed (or exited).

[0335] For example, the base station can indicate to the terminal, by the measurement relaxation criteria, the reference location, the location related threshold, the second parameter information, and the terminal can perform the measurement relaxation of RLM, BFD or RRM in the case that the location condition or the low mobility criterion is met (not necessarily that both the location condition and the low mobility criterion are met). That is, in the case that only the location condition is met, the terminal can perform the measurement relaxation of RLM, BFD or RRM; in the case that only the low mobility criterion is met, the terminal can perform the measurement relaxation of RLM, BFD or RRM. In the case that neither the location condition nor the low mobility criterion is met, the terminal can not perform the measurement relaxation of RLM, BFD or RRM. In this example, the base station does not indicate whether the terminal needs to report the measurement relaxation status to the base station, and the terminal can report the measurement relaxation status or not, depending on the configuration of the terminal itself.

[0336] For another example, the base station can indicate to the terminal, by the measurement relaxation criteria, the reference location, the location related threshold, the second parameter information, and that the terminal can perform the measurement relaxation of RLM, BFD or RRM in case of satisfying the low mobility criterion (i.e. not necessarily in case of simultaneously satisfying the location condition and the low mobility criterion, i.e. the low mobility criterion is a necessary condition while the location condition is a non-necessary condition), and that the terminal needs to report to the base station the measurement relaxation status. That is, in case of only satisfying the low mobility criterion, the terminal can perform the measurement relaxation of RLM, BFD or RRM and report to the base station that the terminal needs to perform the measurement relaxation of RLM, BFD or RRM; in case of only satisfying the location condition, or in case of neither satisfying the location condition nor satisfying the low mobility criterion, the terminal can not perform the measurement relaxation of RLM, BFD or RRM and report to the base station not to perform (or exit from) the measurement relaxation of RLM, BFD or RRM.

[0337] For another example, the base station can indicate to the terminal, by the measurement relaxation criteria, the reference location, the location related threshold, the second parameter information, and that the terminal can perform the measurement relaxation of RLM, BFD or RRM in case of satisfying the low mobility criterion (i.e. not necessarily in case of simultaneously satisfying the location condition and the low mobility criterion, i.e. the low mobility criterion is a necessary condition while the location condition is a non-necessary condition), and that the terminal needs to report to the base station the measurement relaxation status. That is, in case of only satisfying the low mobility criterion, the terminal can perform the measurement relaxation of RLM, BFD or RRM and report to the base station that the terminal needs to perform the measurement relaxation of RLM, BFD or RRM; in case of only satisfying the location condition, or in case of neither satisfying the location condition nor satisfying the low mobility criterion, the terminal can not perform the measurement relaxation of RLM, BFD or RRM and report to the base station not to perform (or exit from) the measurement relaxation of RLM, BFD or RRM.

[0338] For another example, the base station can indicate to the terminal, by the measurement relaxation criteria, the reference location, the location-related threshold, the first parameter information, and the second parameter information, and in the case that the location condition, the good cell service quality criterion or the non-cell edge criterion, and the low mobility criterion are satisfied, the terminal can perform the measurement relaxation of RLM, BFD or RRM, and the terminal needs to report the measurement relaxation status to the base station. That is, in the case that the location condition, the good cell service quality criterion or the non-cell edge criterion, and the low mobility criterion are all satisfied, the terminal can perform the measurement relaxation of RLM, BFD or RRM, and report to the base station that the measurement relaxation of RLM, BFD or RRM needs to be performed; in the case that at least one of the three is not satisfied, the terminal does not perform the measurement relaxation of RLM, BFD or RRM, and reports that the measurement relaxation of RLM, BFD or RRM is not performed (or exited).

[0339] For another example, the base station can indicate to the terminal, by the measurement relaxation criteria, the reference location, the location-related threshold, the first parameter information, and the second parameter information, and in the case that the location condition is satisfied (i.e., the location condition is a necessary condition, and the good cell service quality criterion or the non-cell edge criterion, and the low mobility criterion are non-necessary conditions), the terminal can perform the measurement relaxation of RLM, BFD or RRM. That is, as long as the location condition is satisfied, regardless of whether the good cell service quality criterion or the non-cell edge criterion, and the low mobility criterion are satisfied, the terminal can perform the measurement relaxation of RLM, BFD or RRM; but as long as the location condition is not satisfied, regardless of whether the good cell service quality criterion or the non-cell edge criterion, and the low mobility criterion are satisfied, the terminal can not perform the measurement relaxation of RLM, BFD or RRM. In this example, the base station does not indicate whether the terminal needs to report the measurement relaxation status to the base station, and the terminal can report the measurement relaxation status or not, depending on the configuration of the terminal itself.

[0340] For another example, the base station can indicate to the terminal, by the measurement relaxation criteria, the reference location, the location-related threshold, the first parameter information, and the second parameter information, and the terminal can perform the measurement relaxation of RLM, BFD, or RRM in the case that the location condition and the low mobility condition are satisfied (i.e., the location condition and the low mobility condition are necessary conditions, and the good cell quality condition or the non-cell edge condition is an unnecessary condition). That is, the terminal can perform the measurement relaxation of RLM, BFD, or RRM as long as the location condition and the low mobility condition are satisfied, regardless of whether the good cell quality condition or the non-cell edge condition is satisfied; the terminal can not perform the measurement relaxation of RLM, BFD, or RRM if the location condition is not satisfied, or the low mobility condition is not satisfied, regardless of whether the good cell quality condition or the non-cell edge condition is satisfied. In this example, the base station does not indicate whether the terminal needs to report the measurement relaxation status to the base station, and the terminal can report the measurement relaxation status or not, depending on the terminal's own configuration.

[0341] For another example, the base station can indicate to the terminal, by the measurement relaxation criteria, the reference location, the location-related threshold, the first time information, the first parameter information, and the second parameter information, and the terminal can start evaluating whether the good cell quality condition or the non-cell edge condition is satisfied based on the first parameter information and whether the low mobility condition is satisfied based on the second parameter information, in the case that the location condition and the time condition are satisfied, and the terminal can perform the measurement relaxation of RLM, BFD, or RRM in the case that the location condition, the time condition, the good cell quality condition or the non-cell edge condition, and the low mobility condition are satisfied. That is, the terminal can perform the measurement relaxation of RLM, BFD, or RRM in the case that the location condition, the time condition, the good cell quality condition or the non-cell edge condition, and the low mobility condition are all satisfied; the terminal can not perform (or exit) the measurement relaxation of RLM, BFD, or RRM in the case that at least one of the four conditions is not satisfied. In this example, the base station does not indicate whether the terminal needs to report the measurement relaxation status to the base station, and the terminal can report the measurement relaxation status or not, depending on the terminal's own configuration.

[0342] For example, the base station can indicate to the terminal, by the measurement relaxation criteria, the reference location, the location-related threshold, the first time information, the first parameter information, the second parameter information, and that the terminal can perform the measurement relaxation of RLM, BFD or RRM in case that the location condition is met (i.e., the location condition is a necessary condition, and the good cell service quality criterion or the non-cell edge criterion, the low mobility criterion and the time condition are non-necessary conditions). That is, the terminal can perform the measurement relaxation of RLM, BFD or RRM as long as the location condition is met, regardless of whether the time condition, the good cell service quality criterion or the non-cell edge criterion and the low mobility criterion are met; but the terminal can not perform the measurement relaxation of RLM, BFD or RRM as long as the location condition is not met, regardless of whether the time condition, the good cell service quality criterion or the non-cell edge criterion and the low mobility criterion are met. In this example, the base station does not indicate whether the terminal needs to report the measurement relaxation status to the base station, and the terminal can report the measurement relaxation status or not, depending on the terminal's own configuration.

[0343] For example, the base station can indicate to the terminal, by the measurement relaxation criteria, the reference location, the location-related threshold, the first time information, the first parameter information, the second parameter information, and that the terminal can perform the measurement relaxation of RLM, BFD or RRM in case that the location condition and the time condition are met (i.e., the location condition and the time condition are necessary conditions, and the good cell service quality criterion or the non-cell edge criterion, the low mobility criterion are non-necessary conditions), and that the terminal needs to report the measurement relaxation status to the base station. That is, the terminal can perform the measurement relaxation of RLM, BFD or RRM and report to the base station that the measurement relaxation of RLM, BFD or RRM needs to be performed as long as the location condition and the time condition are met, regardless of whether the good cell service quality criterion or the non-cell edge criterion and the low mobility criterion are met; but the terminal can not perform the measurement relaxation of RLM, BFD or RRM and report to the base station that the measurement relaxation of RLM, BFD or RRM is not performed (or exited) as long as the location condition is not met, or the time condition is not met, regardless of whether the good cell service quality criterion or the non-cell edge criterion and the low mobility criterion are met.

[0344] For brevity, further examples are not listed here.

[0345] Optionally, in the case of a terminal being a connected terminal, the base station can indicate to the terminal a measurement reporting timer, in the case that the terminal reports to the base station that it satisfies the measurement relaxation criteria and initiates the relaxation of the measurement of RLM, BFD or RRM, the terminal initiates the measurement reporting timer, during the initiation of the measurement reporting timer, the terminal can relax the measurement of RLM, BFD or RRM, but does not report the measurement result to the base station. After the measurement reporting timer expires, the terminal can report the measurement result to the base station.

[0346] Optionally, for an idle terminal or an inactive terminal, the result of whether the measurement relaxation criteria is satisfied can not be reported before the normal communication with the base station is resumed, in the case that the normal communication with the base station is required to be resumed, the result of whether the measurement relaxation criteria is satisfied can be reported to the base station.

[0347] Illustratively, for an idle terminal, the idle terminal can report to the base station whether the measurement relaxation criteria of RRM is satisfied in the RRC setup complete message (RRCSetupComplete) or the UE assistance information (UEAssistanceInformation). Alternatively, the idle terminal can report to the base station in the RRC setup complete message (RRCSetupComplete) that the terminal has saved the availability indication of the measurement relaxation, after the security is activated, the base station can request the terminal to report whether the measurement relaxation criteria of RRM is satisfied. The base station can immediately send a request to the terminal to report whether the measurement relaxation criteria of RRM is satisfied after sending the transmission security mode command (i.e. before the base station receives the security mode complete from the terminal).

[0348] Illustratively, for an inactive terminal, the base station can request the terminal to provide the measurement relaxation criteria of RRM in the RRC resume message (RRCResume), the inactive terminal reports whether the measurement relaxation criteria of RRM is satisfied in the RRC resume complete (RRCResumeComplete) message. Alternatively, the inactive terminal can provide the base station in the RRC resume complete message that the terminal has saved the availability indication of the measurement relaxation, and then the base station can request the terminal to report whether the measurement relaxation criteria of RRM is satisfied.

[0349] Based on the above technical solution, firstly, in the NTN, based on the measurement relaxation mechanism of RLM, BFD or RRM of the reference position of the to-be-measured NTN cell, not only the power consumption of the terminal can be reduced, but also the characteristics that the difference of air interface signal quality at the cell center and the cell edge is not obvious under the NTN can be better adapted, and the measurement of RLM, BFD or RRM can be more effectively performed. Further, by combining the first time information, the terminal can determine whether the measurement relaxation standard is met within a specific time according to the time of the satellite service, and determine the time period in which the measurement relaxation is performed. Not only the power consumption of the terminal can be reduced, but also the starting time of the terminal served by the satellite can be avoided to start determining whether the measurement relaxation standard is met, and the effectiveness of the measurement relaxation can be improved. Further, by combining the good cell service quality standard or the non-cell edge standard, and / or the low mobility standard, the terminal can not only reduce the power consumption of the terminal, but also improve the effectiveness of the measurement relaxation.

[0350] FIG. 5 is a schematic flowchart of another method for measurement relaxation in an NTN according to an embodiment of the present application.

[0351] The method 500 shown in FIG. 5 can include steps 510 and 520. The method 500 can be performed by a communication device, which can be a terminal, or a component (such as a chip, a chip system, etc.) configured in the terminal, or a logical module or software capable of realizing all or part of the terminal functions, which is not limited in the present application. In the following, the terminal is taken as an example to explain each step in the method 500 in detail.

[0352] In step 510, the terminal obtains a measurement relaxation standard, the measurement relaxation standard being used to indicate first time information, the first time information being used to indicate a time for performing measurement relaxation.

[0353] The first time information is associated with a to-be-measured NTN cell. It can be understood that each to-be-measured NTN cell corresponds to one first time information, and the reference positions of different to-be-measured NTN cells can be different.

[0354] The terminal obtains the measurement relaxation standard. It can be understood that the terminal can receive all or part of the measurement relaxation standard from other devices (for example, a base station), and part of the measurement relaxation standard can be configured on the terminal.

[0355] Exemplarily, the measurement relaxation standard can be carried in an NTN cell broadcast message, and the terminal can receive the NTN cell broadcast message to obtain the measurement relaxation standard. Alternatively, the measurement relaxation standard can be carried in an RRC dedicated message, and the terminal can receive the RRC dedicated message to obtain the measurement relaxation standard.

[0356] For example, the base station or the NTN cell can send the measurement relaxation criteria carrying the first time information to the terminal through an NTN cell broadcast message or an RRC dedicated message, and accordingly, the terminal can receive the measurement relaxation criteria from the base station or the NTN cell.

[0357] In step 520, the terminal performs measurement relaxation on one or more of RLM, BFD or RRM based on the measurement relaxation criteria.

[0358] After obtaining the measurement relaxation criteria, the terminal can perform measurement relaxation on one or more of RLM, BFD or RRM of the NTN cell to be measured based on the measurement relaxation criteria.

[0359] For detailed description of the terminal performing measurement relaxation on RLM, BFD or RRM, reference can be made to the relevant description above in step 320 of method 300 regarding measurement relaxation on RLM, BFD or RRM of the NTN cell to be measured, which will not be repeated here for brevity.

[0360] Optionally, the first time information includes a first time point, which is used to indicate that measurement relaxation is performed before the first time point.

[0361] In an example, the measurement relaxation criteria can be used to indicate a first time point t1-Threshold, before which the terminal can perform measurement relaxation on RLM, BFD or RRM. That is, the terminal can perform measurement relaxation on RLM, BFD or RRM before the first time point t1-Threshold, and after the first time point t1-Threshold, the terminal can not perform measurement relaxation on RLM, BFD or RRM. That is, the time Mt at which the terminal performs measurement relaxation on RLM, BFD or RRM satisfies: Mt≤t1-Threshold (for the sake of description, this condition is referred to as condition 17).

[0362] In actual application scenarios, as an example but not limitation, the value of the first time point t1-Threshold can be coordinated universal time (UTC). For detailed description of the value of the first time, reference can be made to the relevant description in example thirteen above, which will not be repeated here for brevity. In actual application scenarios, the specific value of the first time point is not limited in the present application.

[0363] It can be understood that the first time point t1-Threshold is earlier than a time T-service at which the serving satellite associated with the NTN serving cell stops serving. For example, the service time of the serving satellite 1 to the region 1 is 8:00-10:00 (24-hour system), and the first time point t1-Threshold can be a time point earlier than the service end time 10:00 in 8:00-10:00.

[0364] Optionally, the first time information includes a first duration and a second time point, and the first duration and the second time point are used to indicate that the measurement relaxation is performed within the first duration starting from the second time point.

[0365] In an example, the measurement relaxation criterion can be used to indicate a first duration T-Duration and a second time point t2-Threshold. The terminal can perform measurement relaxation of RLM, BFD or RRM in a period from the second time point t2-Threshold to t2-Threshold+T-Duration; and before the second time point t2-Threshold, or after t2-Threshold+T-Duration, the terminal can not perform measurement relaxation of RLM, BFD or RRM. That is, the time Mt at which the terminal performs measurement relaxation of RLM, BFD or RRM satisfies: t2-Threshold≤Mt≤t2-Threshold+T-Duration (for ease of description, the condition is recorded as condition 18).

[0366] It can be understood that the above condition 18 can be transformed into Mt∈[t2-Threshold, t2-Threshold+T-Duration], which is not limited in the present application.

[0367] It can also be understood that t2-Threshold+T-Duration is earlier than the time T-service at which the serving satellite associated with the NTN serving cell stops serving. For example, the service time of the serving satellite 1 to the region 1 is 8:00-10:00 (24-hour system), and t2-Threshold+T-Duration can be a time point earlier than the service end time 10:00 in 8:00-10:00.

[0368] Optionally, the first time information includes a third time point and a fourth time point, the third time point is earlier than the fourth time point, and the third time point and the fourth time point are used to indicate that the measurement relaxation is performed between the third time point and the fourth time point.

[0369] In an example, the measurement relaxation criterion can be used to indicate a third time point t3-Threshold and a fourth time point t4-Threshold, between which the terminal can relax the measurement of RLM, BFD or RRM. That is, the time Mt at which the terminal relaxes the measurement of RLM, BFD or RRM satisfies: Mt∈[t3-Threshold, t4-Threshold] (for ease of description, this condition is referred to as condition 19).

[0370] It can be understood that the above condition 19 can be transformed into t3-Threshold≤Mt≤t4-Threshold, which is not limited in the present application.

[0371] It can also be understood that the fourth time point t4-Threshold is earlier than the time T-service at which the service satellite associated with the NTN serving cell stops serving. For example, the service time of the service satellite 1 to the region 1 is 8:00-10:00 (24-hour system), and the fourth time point t4-Threshold can be a time point earlier than the service end time 10:00 in 8:00-10:00.

[0372] For ease of description, the above conditions 17 to 19 can be collectively referred to as time conditions. In some possible implementation manners, the base station can carry the above time conditions together in the measurement relaxation criterion and indicate them to the terminal. In another possible implementation manner, the above time conditions can be directly deployed on the terminal, and the terminal can determine whether to perform measurement relaxation and at what time to perform measurement relaxation based on the reference location, the threshold, the first time information and the time conditions deployed on the terminal indicated by the base station.

[0373] Through the first time information, the terminal can determine whether the measurement relaxation criterion is satisfied and determine the time period in which the measurement relaxation is performed according to the time of its satellite service, which not only reduces the power consumption of the terminal, but also avoids starting to determine whether the measurement relaxation criterion is satisfied from the start time of the satellite service to the terminal, and can improve the effectiveness of the measurement relaxation.

[0374] In a possible implementation manner, the measurement relaxation criterion can also indicate one or more of the above reference location, the location-related threshold, the location condition, the time condition, the first parameter information and / or the second parameter information.

[0375] That is, the terminal can determine whether the measurement relaxation condition for RLM, BFD or RRM is satisfied based on one or more of the reference location, the location-related threshold, the location condition, the first time information, the time condition, the first parameter information and the second parameter information configured by the base station to the terminal.

[0376] For example, the base station can indicate the first time information, the reference location and the location-related threshold to the terminal through the measurement relaxation criterion.

[0377] Detailed description of the reference location and the location-related threshold can be found in the above description of the method 300, which will not be repeated here for brevity.

[0378] In one possible implementation, the terminal can determine whether the time condition is satisfied based on the first time information, and determine whether the location condition is satisfied based on the reference location and the location-related threshold; in the case that both the time condition and the location condition are satisfied, the terminal can perform the measurement relaxation for RLM, BFD or RRM; in the case that only the time condition is satisfied, or only the location condition is satisfied, or neither the time condition nor the location condition is satisfied, the terminal can not perform the measurement relaxation for RLM, BFD or RRM.

[0379] In another possible implementation, the terminal can first determine whether the time condition is satisfied based on the first time information, and only start determining whether the location condition is satisfied based on the reference location and the location-related threshold in the case that the time condition is satisfied; in the case that both the time condition and the location condition are satisfied, the terminal can perform the measurement relaxation for RLM, BFD or RRM; in the case that only the time condition is satisfied, or only the location condition is satisfied, or neither the time condition nor the location condition is satisfied, the terminal can not perform the measurement relaxation for RLM, BFD or RRM.

[0380] For another example, the base station can indicate the first time information and the first parameter information to the terminal through the measurement relaxation criterion.

[0381] Detailed description of the first parameter information can be found in the above description of the method 300, which will not be repeated here for brevity.

[0382] In a possible implementation, the terminal can determine whether the time condition is met based on the first time information, and determine whether the good cell service quality criterion or the non-cell edge criterion is met based on the first parameter information; in a case where both the time condition and the good cell service quality criterion are met, the terminal can perform the measurement relaxation of RLM, BFD or RRM; in a case where only the time condition is met, or only the good cell service quality criterion is met, or neither the time condition nor the good cell service quality criterion is met, the terminal can not perform the measurement relaxation of RLM, BFD or RRM.

[0383] In another possible implementation, the terminal can first determine whether the time condition is met based on the first time information, and only start to evaluate whether the good cell service quality criterion is met based on the first parameter information in a case where the time condition is met; in a case where both the time condition and the good cell service quality criterion are met, the terminal can perform the measurement relaxation of RLM, BFD or RRM; in a case where only the time condition is met, or only the good cell service quality criterion is met, or neither the time condition nor the good cell service quality criterion is met, the terminal can not perform the measurement relaxation of RLM, BFD or RRM.

[0384] For another example, the base station can indicate the first time information and the second parameter information to the terminal through the measurement relaxation criterion.

[0385] In a possible implementation, the terminal can determine whether the time condition is met based on the first time information, and determine whether the low mobility criterion is met based on the second parameter information; in a case where both the time condition and the low mobility criterion are met, the terminal can perform the measurement relaxation of RLM, BFD or RRM; in a case where only the time condition is met, or only the low mobility criterion is met, or neither the time condition nor the low mobility criterion is met, the terminal can not perform the measurement relaxation of RLM, BFD or RRM.

[0386] In another possible implementation, the terminal can first determine whether the time condition is met based on the first time information, and only start to evaluate whether the low mobility criterion is met based on the second parameter information in a case where the time condition is met; in a case where both the time condition and the low mobility criterion are met, the terminal can perform the measurement relaxation of RLM, BFD or RRM; in a case where only the time condition is met, or only the low mobility criterion is met, or neither the time condition nor the low mobility criterion is met, the terminal can not perform the measurement relaxation of RLM, BFD or RRM.

[0387] For another example, the base station can indicate the first time information, the first parameter information and the second parameter information to the terminal through the measurement relaxation criterion.

[0388] In a possible implementation, the terminal can determine whether the time condition is met based on the first time information, and determine whether the good cell service quality criterion or the non-cell edge criterion is met based on the first parameter information, and determine whether the low mobility criterion is met based on the second parameter information; in a case where all of the three conditions are met, the terminal can perform the measurement relaxation of RLM, BFD or RRM; in a case where at least one of the three conditions is not met, the terminal can not perform the measurement relaxation of RLM, BFD or RRM.

[0389] In another possible implementation, the terminal can first determine whether the time condition is met based on the first time information, and only in a case where the time condition is met, the terminal starts to determine whether the good cell service quality criterion or the non-cell edge criterion is met based on the first parameter information, and assesses whether the low mobility criterion is met based on the second parameter information; in a case where all of the three conditions are met, the terminal can perform the measurement relaxation of RLM, BFD or RRM; in a case where at least one of the three conditions is not met, the terminal can not perform the measurement relaxation of RLM, BFD or RRM.

[0390] In yet another possible implementation, the terminal can first determine whether the time condition is met based on the first time information, and assesses whether the low mobility criterion is met based on the second parameter information, and only in a case where the time condition and the low mobility criterion are met, the terminal starts to determine whether the good cell service quality criterion or the non-cell edge criterion is met based on the first parameter information; in a case where all of the three conditions are met, the terminal can perform the measurement relaxation of RLM, BFD or RRM; in a case where at least one of the three conditions is not met, the terminal can not perform the measurement relaxation of RLM, BFD or RRM.

[0391] In yet another possible implementation, the terminal can first determine whether the time condition is met based on the first time information, and determine whether the good cell service quality criterion or the non-cell edge criterion is met based on the first parameter information, and only in a case where the time condition and the good cell service quality criterion or the non-cell edge criterion are met, the terminal starts to assess whether the low mobility criterion is met based on the second parameter information; in a case where all of the three conditions are met, the terminal can perform the measurement relaxation of RLM, BFD or RRM; in a case where at least one of the three conditions is not met, the terminal can not perform the measurement relaxation of RLM, BFD or RRM.

[0392] In yet another possible implementation, the terminal can first determine whether the good cell service quality criterion or the non-cell edge criterion is met based on the first parameter information, and evaluate whether the low mobility criterion is met based on the second parameter information, and only in the case that the good cell service quality criterion or the non-cell edge criterion and the low mobility criterion are met, the terminal starts to determine whether the time condition is met based on the first time information; in the case that all the three criteria are met, the terminal can perform the measurement relaxation of RLM, BFD or RRM; in the case that at least one of the three criteria is not met, the terminal can not perform the measurement relaxation of RLM, BFD or RRM.

[0393] For more detailed description of the combination use of the first time information and / or the time condition with other contents (e.g., one or more of the reference location, the location related threshold, the location criterion, the first parameter information and / or the second parameter information), please refer to the relevant description of the first time information and / or the time condition involved in the method 300 above, which will not be repeated here for brevity.

[0394] Optionally, the terminal reports the measurement relaxation state of one or more of RLM, BFD or RRM.

[0395] The measurement relaxation state can be understood as whether the measurement relaxation criterion is met.

[0396] By way of example but not limitation, the terminal can report the measurement relaxation state to the base station through the first assistance information, i.e., the measurement relaxation state can be carried in the first assistance information.

[0397] For more detailed description of the terminal reporting the measurement relaxation state, please refer to the relevant description in the method 300 above, which will not be repeated here for brevity.

[0398] Optionally, the measurement relaxation criteria can be used to indicate, in addition to one or more of the above-mentioned reference position, position-related threshold, position condition, first time information, time condition, first parameter information, and second parameter information, under what circumstances the terminal performs measurement relaxation of RLM, BFD, or RRM, and / or whether the terminal needs to report the measurement relaxation state to the base station. In the case where the base station indicates that the terminal needs to report the measurement relaxation state, the terminal can report to the base station that the terminal needs to perform or not perform (or exit) measurement relaxation of RLM, BFD, or RRM. In the case where the base station does not indicate that the terminal needs to report the measurement relaxation state, the terminal can report the measurement relaxation state or not report the measurement relaxation state, in which case whether to report the measurement relaxation state depends on the configuration information on the terminal itself, that is, if the terminal is configured to report the measurement relaxation state, the terminal can report the measurement relaxation state to the base station; if the terminal is configured not to report the measurement relaxation state, or the terminal is not configured whether to report the measurement relaxation state, the terminal can not report the measurement relaxation state. The detailed description of this part can be referred to the related description in the method 300 above, and will not be repeated here for brevity.

[0399] In the method 300 and the method 500, for the connected-state terminal, before the base station indicates the measurement relaxation criteria to the terminal, the base station needs to know whether the terminal has the capability of performing measurement relaxation based on the position condition and / or the time condition.

[0400] In a possible implementation, the terminal can actively report to the base station whether it has the capability of performing measurement relaxation based on the position condition and / or the time condition.

[0401] In another possible implementation, the base station can inquire the terminal whether it has the capability of performing measurement relaxation based on the position condition and / or the time condition, and accordingly, the terminal can reply to the inquiry of the base station to inform the base station whether it has the capability of performing measurement relaxation based on the position condition and / or the time condition.

[0402] In yet another possible implementation, in the case where the terminal switches the NTN serving cell, the base station associated with the current NTN serving cell can obtain, from the base station associated with the NTN serving cell before the switching, whether the terminal has the capability of performing measurement relaxation based on the position condition and / or the time condition.

[0403] FIG. 6 is a schematic diagram of interaction between a base station and a terminal according to an embodiment of the present application.

[0404] In step 610, the base station sends a first message to the terminal. Accordingly, the terminal receives the first message.

[0405] The first message (e.g., UECapabilityEnquiry) is used to instruct the terminal to report whether the terminal has the capability of performing measurement relaxation based on a location condition and / or a time condition.

[0406] In step 620, the terminal sends a second message to the base station. Accordingly, the base station receives the second message.

[0407] The second message (e.g., UECapabilityInformation) is used to inform the base station whether the terminal has the capability of performing measurement relaxation based on a location condition and / or a time condition.

[0408] The method of measurement relaxation in NTN provided by the present application is briefly described again below in combination with FIG. 7 and FIG. 8.

[0409] FIG. 7 is an interaction diagram of a base station and a terminal suitable for the method of measurement relaxation in NTN provided by the embodiments of the present application.

[0410] In step 710, the base station sends a broadcast message or RRC dedicated signaling to the terminal, the broadcast message or RRC dedicated signaling being used to indicate a measurement relaxation criterion carrying a reference location. Accordingly, the terminal receives the broadcast message or RRC dedicated signaling.

[0411] For a connected state terminal, the base station can indicate the measurement relaxation criterion carrying the reference location to the terminal through the broadcast message or RRC dedicated signaling; for an idle state terminal, the base station can indicate the measurement relaxation criterion carrying the reference location to the terminal through the broadcast message.

[0412] For detailed description of the reference location and the measurement relaxation criterion, reference can be made to the related description in the method 300 above, which will not be repeated here for brevity.

[0413] In step 720, the terminal judges whether the measurement relaxation condition is met based on the measurement relaxation criterion.

[0414] For detailed description, reference can be made to the related description in examples one to twenty-one in the method 300, which will not be repeated here for brevity.

[0415] In step 730, the terminal reports the measurement relaxation state to the base station.

[0416] The measurement relaxation state can be understood as whether the measurement relaxation criterion is met. As an example but not limitation, 1 can be used to represent that the measurement relaxation criterion is met or the terminal is in the measurement relaxation state, and 0 can be used to represent that the measurement relaxation criterion is not met or the terminal is not in the measurement relaxation state. The present application does not make limitation in this regard.

[0417] In the case of a terminal being a connected terminal, in the case that the terminal satisfies the measurement relaxation standard, or in the case that the terminal satisfies the condition of performing measurement relaxation on RLM, BFD or RRM, the terminal can report to the base station that it satisfies the measurement relaxation standard; in the case that the terminal does not satisfy the measurement relaxation standard, or in the case that the terminal does not satisfy the condition of performing measurement relaxation on RLM, BFD or RRM, the terminal can report to the base station that it does not satisfy the measurement relaxation standard.

[0418] FIG. 8 is another interaction diagram of a base station and a terminal applicable to the method of measurement relaxation in an NTN provided by the embodiments of the present application.

[0419] In step 810, the base station sends a broadcast message or RRC dedicated signaling to the terminal, the broadcast message or RRC dedicated signaling being used to indicate the measurement relaxation standard carrying the first time information. Correspondingly, the terminal receives the broadcast message or RRC dedicated signaling.

[0420] For a connected terminal, the base station can indicate to the terminal through a broadcast message or RRC dedicated signaling the measurement relaxation standard carrying the first time information; for an idle terminal, the base station can indicate to the terminal through a broadcast message the measurement relaxation standard carrying the first time information.

[0421] For detailed description of the first time information and the measurement relaxation standard, reference can be made to the related description in the method 500 above, which will not be repeated here for brevity.

[0422] In step 820, the terminal determines whether the measurement relaxation condition is satisfied based on the measurement relaxation standard.

[0423] For detailed description, reference can be made to the related description in the method 500, which will not be repeated here for brevity.

[0424] In step 830, the terminal reports to the base station the measurement relaxation state.

[0425] For detailed description, reference can be made to the related description of step 730 in FIG. 7 above, which will not be repeated here for brevity.

[0426] FIG. 9 is a schematic block diagram of an open RAN architecture applicable to the method of measurement relaxation in an NTN provided by the embodiments of the present application.

[0427] The method of measurement relaxation in an NTN provided by the present application is described again in conjunction with the open RAN architecture shown in FIG. 9.

[0428] As shown in FIG. 9, first, a non-real time RIC can send one or more of the following information of a satellite to a real time RIC:

[0429] one or more ephemeris information;

[0430] wherein the ephemeris can be represented in a form of a position and velocity state vector in an earth-centered earth-fixed (ECEF) coordinate system, or in a form of orbital parameters in an earth-centered inertial (ECI) coordinate system. Wherein the ECI and ECEF coordinate systems coincide at an epoch time, i.e., the x, y, z axes in the ECEF coordinate system are aligned with the x, y, z axes in the ECI at the epoch time.

[0431] one or more satellite coverage area information or time information of when a satellite stops serving its current coverage area;

[0432] one or more satellite reference locations or moving reference locations;

[0433] wherein the moving reference location refers to a reference location of a serving cell of an NTN earth moving cell in a time reference.

[0434] one or more carrier frequencies of the satellite;

[0435] one or more physical cell identities (PCIs) of the satellite;

[0436] one or more distance thresholds; etc.

[0437] Further, the real time RIC determines, based on the one or more of the above information of the satellite, a location-based measurement relaxation criterion for the terminal, and / or a time-based measurement relaxation criterion for the terminal. Details can be referred to the above description of the method 300 and the method 500, and for brevity, will not be repeated here.

[0438] Further, in a possible implementation, the real-time RIC can send the location-based measurement relaxation criterion and / or the time-based measurement relaxation criterion to the O-CU-CP, and the O-CU-CP can send the location-based measurement relaxation criterion and / or the time-based measurement relaxation criterion to the terminal. In another possible implementation, the real-time RIC can send the location-based measurement relaxation criterion and / or the time-based measurement relaxation criterion to the O-DU, and the O-DU can broadcast the location-based measurement relaxation criterion and / or the time-based measurement relaxation criterion to the terminal. For brevity, the detailed description can be referred to the related description in the above method 300 and method 500.

[0439] The method for measurement relaxation in the NTN provided by the embodiments of the present application is described in detail above in combination with the drawings. The communication apparatus provided by the embodiments of the present application is described in detail below in combination with the drawings.

[0440] It should be understood that the apparatuses shown in FIGS. 10-11 can be used to implement the functions of the terminal or the NTN device (for example, the satellite base station) in the above method embodiments, and thus can also achieve the beneficial effects possessed by the above method embodiments. In the embodiments of the present application, the apparatus can be the terminal in any one of the method embodiments shown in FIGS. 3, 5-8, or can be a component (such as a chip, a chip system, a processor, etc.) configured in the terminal, or can be a logical module or software capable of implementing part or all of the functions of the terminal; or the apparatus can be the base station in any one of the method embodiments shown in FIGS. 3, 5-8, or can be a component (such as a chip, a chip system, a processor, etc.) configured in the base station, or can be a logical module or software capable of implementing part or all of the functions of the base station.

[0441] FIG. 10 is a schematic block diagram of a communication apparatus provided by an embodiment of the present application.

[0442] As shown in FIG. 10, the communication apparatus 1000 includes an acquisition module 1010 and a processing module 1020. The communication apparatus 1000 can be used to implement the functions of the terminal or the base station in any one of the method embodiments shown in FIGS. 3, 5-8.

[0443] When the communication apparatus 1000 is used to implement the functions of the terminal in the method embodiment shown in FIG. 4, the acquisition module 1010 can be used to acquire a measurement relaxation criterion, the measurement relaxation criterion being used to indicate a reference position, the reference position being associated with an NTN cell to be measured; and the processing module 1020 can be used to perform measurement relaxation on one or more of the following based on the measurement relaxation criterion: RLM, BFD, or RRM.

[0444] Optionally, the terminal is in a connected state, the NTN cell to be measured includes an NTN serving cell of the terminal and / or a neighbor cell of the NTN serving cell, and based on the measurement relaxation criterion, measurement relaxation of one or more of RLM, BFD or RRM is performed, including: based on the measurement relaxation criterion, measurement relaxation of one or more of RLM, BFD or RRM of the NTN serving cell is performed, and / or measurement relaxation of RRM of the neighbor cell is performed.

[0445] Optionally, the measurement relaxation criterion is further used to indicate a first distance threshold, the first distance threshold being associated with the NTN serving cell; and the processing module 1020 can be specifically used to perform measurement relaxation of one or more of RLM, BFD or RRM of the NTN serving cell and / or measurement relaxation of RRM of the neighbor cell, in a case that a distance between the terminal and the NTN serving cell is less than or equal to the first distance threshold; wherein the distance between the terminal and the NTN serving cell is determined based on the reference location.

[0446] Optionally, the measurement relaxation criterion is further used to indicate a first distance threshold, ephemeris information of a serving satellite and a satellite epoch time, the first distance threshold and the serving satellite being associated with the NTN serving cell; the processing module 1020 can be specifically used to perform measurement relaxation of one or more of RLM, BFD or RRM of the NTN serving cell and / or measurement relaxation of RRM of the neighbor cell, in a case that a distance between the terminal and the NTN serving cell is less than or equal to the first distance threshold; wherein the distance between the terminal and the NTN serving cell is determined based on the reference location, the satellite epoch time and the ephemeris information.

[0447] Optionally, the reference location includes a reference location of the NTN serving cell and a reference location of at least one first neighbor cell, the first neighbor cell being any one of the neighbor cells of the NTN serving cell, the measurement relaxation parameter is further used to indicate a first distance threshold and at least one second distance threshold, the first distance threshold being associated with the NTN serving cell, the at least one second distance threshold being associated with at least one of the first neighbor cells; and the processing module 1020 can be specifically used to perform measurement relaxation of one or more of RLM, BFD or RRM of the NTN serving cell and / or measurement relaxation of RRM of the neighbor cell, in a case that a distance between the terminal and the NTN serving cell is less than or equal to the first distance threshold, and a distance between the terminal and the first neighbor cell is greater than or equal to the second distance threshold; wherein the distance between the terminal and the NTN serving cell is determined based on the reference location of the NTN serving cell, and the distance between the terminal and the first neighbor cell is determined based on the reference location of the first neighbor cell.

[0448] Optionally, the reference location comprises a reference location of the NTN serving cell and a reference location of at least one first neighbor cell, the first neighbor cell being any neighbor cell of the NTN serving cell; the measurement relaxation parameter is further used to indicate a first distance threshold, ephemeris information of a serving satellite and a satellite time of week, and ephemeris information of at least one neighbor satellite of the serving satellite and at least one second distance threshold, the first distance threshold being associated with the NTN serving cell and the serving satellite, and the at least one second distance threshold being associated with the at least one first neighbor cell; the processing module 1020 can be specifically configured to perform the measurement relaxation of one or more of the following: RLM, BFD or RRM on the NTN serving cell, and / or perform the measurement relaxation of RRM on the neighbor cell, in a case that a distance between the terminal and the NTN serving cell is less than or equal to the first distance threshold, and a distance between the terminal and the first neighbor cell is greater than or equal to the second distance threshold, wherein the distance between the terminal and the NTN serving cell is determined based on the reference location of the NTN serving cell, the satellite time of week and the ephemeris information of the serving satellite, and the distance between the terminal and the first neighbor cell is determined based on the reference location of the first neighbor cell, the satellite time of week and the ephemeris information of the neighbor satellite.

[0449] Optionally, the measurement relaxation criterion is further used to indicate a distance variation threshold and a time duration threshold, the distance variation threshold and the time duration threshold being associated with the NTN serving cell; the processing module 1020 can be specifically configured to perform the measurement relaxation of one or more of the following: RLM, BFD or RRM on the NTN serving cell, and / or perform the measurement relaxation of RRM on the neighbor cell, in a case that a variation of a distance between the terminal and the NTN serving cell is less than or equal to the distance variation threshold within the time duration threshold, wherein the distance between the terminal and the NTN serving cell is determined based on the reference location.

[0450] Optionally, the measurement relaxation parameter is further used to indicate ephemeris information of a serving satellite, a satellite time of week, a distance variation threshold and a time duration threshold, the serving satellite, the distance variation threshold and the time duration threshold being associated with the NTN serving cell; the processing module 1020 can be specifically configured to perform the measurement relaxation of one or more of the following: RLM, BFD or RRM on the NTN serving cell, and / or perform the measurement relaxation of RRM on the neighbor cell, in a case that a variation of a distance between the terminal and the NTN serving cell is less than or equal to the distance variation threshold, wherein the distance between the terminal and the NTN serving cell is determined based on the reference location, the satellite time of week and the ephemeris information.

[0451] Optionally, the terminal is in an idle state or an inactive state, the NTN cell to be measured includes an NTN serving cell where the terminal is located and / or a neighbor cell of the NTN serving cell, and based on the measurement relaxation standard, measurement relaxation of one or more of RLM, BFD or RRM is performed, including performing measurement relaxation of RRM of the neighbor cell based on the measurement relaxation standard.

[0452] Optionally, the measurement relaxation standard further indicates a third distance threshold, the third distance threshold being associated with the NTN serving cell; the processing module 1020 can be specifically configured to perform measurement relaxation of RRM of the neighbor cell in a case that a distance between the terminal and the NTN serving cell is less than or equal to the third distance threshold; wherein the distance between the terminal and the NTN serving cell is determined based on the reference location.

[0453] Optionally, the measurement relaxation standard further indicates a third distance threshold, ephemeris information of a serving satellite and a satellite epoch time, the third distance threshold and the serving satellite being associated with the NTN serving cell; the processing module 1020 can be specifically configured to perform measurement relaxation of RRM of the neighbor cell in a case that a distance between the terminal and the NTN serving cell is less than or equal to the third distance threshold; wherein the distance between the terminal and the NTN serving cell is determined based on the reference location, the satellite epoch time and the ephemeris information.

[0454] Optionally, the reference location includes a reference location of the NTN serving cell and a reference location of at least one first neighbor cell, the first neighbor cell being any neighbor cell of the NTN serving cell; the measurement relaxation parameter further indicates a third distance threshold and at least one fourth distance threshold, the third distance threshold being associated with the NTN serving cell, the at least one fourth distance threshold being associated with at least one first neighbor cell; the processing module 1020 can be specifically configured to perform measurement relaxation of RRM of the neighbor cell in a case that a distance between the terminal and the NTN serving cell is less than or equal to the third distance threshold, and a distance between the terminal and the first neighbor cell is greater than or equal to the fourth distance threshold; wherein the distance between the terminal and the NTN serving cell is determined based on the reference location of the NTN serving cell, and the distance between the terminal and the first neighbor cell is determined based on the reference location of the first neighbor cell.

[0455] Optionally, the reference position comprises a reference position of the NTN serving cell and a reference position of at least one first neighbor cell, the first neighbor cell being any neighbor cell of the NTN serving cell; the measurement relaxation parameter further indicates a third distance threshold, ephemeris information of a serving satellite, and a satellite time of week, and ephemeris information of at least one neighbor satellite of the serving satellite and at least one fourth distance threshold, the third distance threshold being associated with the NTN serving cell and the serving satellite, and the at least one fourth distance threshold being associated with the at least one first neighbor cell; the processing module 1020 can be specifically configured to perform the measurement relaxation of the RRM of the neighbor cell in a case that a distance between the terminal and the NTN serving cell is less than or equal to the third distance threshold, and a distance between the terminal and the first neighbor cell is greater than or equal to the fourth distance threshold, wherein the distance between the terminal and the NTN serving cell is determined based on the reference position of the NTN serving cell, the satellite time of week, and the ephemeris information of the serving satellite, and the distance between the terminal and the first neighbor cell is determined based on the reference position of the first neighbor cell, the satellite time of week, and the ephemeris information of the neighbor satellite.

[0456] Optionally, the measurement relaxation criterion further indicates a distance variation threshold and a time duration threshold, the distance variation threshold and the time duration threshold being associated with the NTN serving cell; the processing module 1020 can be specifically configured to perform the measurement relaxation of the RRM of the neighbor cell in a case that a variation of a distance between the terminal and the NTN serving cell is less than or equal to the distance variation threshold within the time duration threshold, wherein the distance between the terminal and the NTN serving cell is determined based on the reference position.

[0457] Optionally, the measurement relaxation parameter further indicates ephemeris information of a serving satellite, a satellite time of week, a distance variation threshold, and a time duration threshold, the serving satellite, the distance variation threshold, and the time duration threshold being associated with the NTN serving cell; the processing module 1020 can be specifically configured to perform the measurement relaxation of the RRM of the neighbor cell in a case that a variation of a distance between the terminal and the NTN serving cell is less than or equal to the distance variation threshold, wherein the distance between the terminal and the NTN serving cell is determined based on the reference position, the satellite time of week, and the ephemeris information.

[0458] Optionally, the measurement relaxation criterion further indicates first time information, the first time information being used to indicate a time of performing the measurement relaxation.

[0459] Optionally, the first time information comprises: a first time point, the first time point being used to indicate that measurement relaxation is performed before the first time point; or a first time length and a second time point, the first time length and the second time point being used to indicate that measurement relaxation is performed within the first time length starting from the second time point; or a third time point and a fourth time point, the third time point being earlier than the fourth time point, the third time point and the fourth time point being used to indicate that measurement relaxation is performed between the third time point and the fourth time point.

[0460] Optionally, the measurement relaxation criterion is further used to indicate first parameter information and / or second parameter information; wherein the first parameter information is used to evaluate whether a serving cell in which the terminal is located satisfies a good cell quality of service criterion or a non-cell edge criterion, and the second parameter information is used to evaluate whether the terminal satisfies a low mobility criterion; the processing module 1020 can be specifically configured to perform measurement relaxation on one or more of the following: RLM, BFD or RRM, based on the reference location and the first parameter information and / or the second parameter information.

[0461] Optionally, the measurement relaxation criterion is further used to indicate first parameter information and / or second parameter information; wherein the first parameter information is used to evaluate whether a serving cell in which the terminal is located satisfies a good cell quality of service criterion or a non-cell edge criterion, and the second parameter information is used to evaluate whether the terminal satisfies a low mobility criterion; the processing module 1020 can be specifically configured to perform measurement relaxation on one or more of the following: RLM, BFD or RRM, based on the reference location and the first time information, and the first parameter information and / or the second parameter information.

[0462] Optionally, the processing module 1020 is further configured to report a measurement relaxation state of one or more of the following: RLM, BFD or RRM.

[0463] For more detailed description of the above-mentioned various modules, please refer to the relevant description in the method embodiment shown in FIG. 4 directly, which will not be repeated here.

[0464] It should be understood that the division of modules in the embodiments of the present application is illustrative, and is only a logical functional division. In actual implementation, there can be another division manner. In addition, each functional module in each embodiment of the present application can be integrated in one processor, or can be physically separated, or two or more modules can be integrated in one module. The integrated module can be realized in the form of hardware or in the form of a software functional module.

[0465] FIG. 11 is another schematic block diagram of a communication apparatus provided by an embodiment of the present application.

[0466] The communication apparatus 1100 can be a chip system, or can also be a device configured with a chip system to implement the method in the above method embodiments. In the embodiments of the present application, the chip system can be composed of a chip, or can also include a chip and other discrete devices.

[0467] As shown in FIG. 11, the communication apparatus 1100 can include a processor 1110, which can be used to execute computer programs or instructions in the memory to implement the steps performed by the terminal or the steps performed by the base station in any of the method embodiments shown in FIG. 3, FIG. 5 to FIG. 8.

[0468] Optionally, the communication apparatus 1100 further includes a communication interface 1120. The communication interface 1120 can be used to communicate with other devices through a transmission medium, so that the communication apparatus 1100 can communicate with other devices. The communication interface 1120 can be, for example, a transceiver, an interface, a bus, a circuit or a device capable of realizing the transceiving function. The processor 1110 can input and output data through the communication interface 1120, and be used to implement the method in any of the corresponding embodiments of FIG. 3, FIG. 5 to FIG. 8. Specifically, the communication apparatus 1100 can be used to implement the functions of the terminal or the base station in the above method embodiments.

[0469] Optionally, the communication apparatus 1100 further includes at least one memory 1130 for storing program instructions and / or data. The memory 1130 is coupled with the processor 1110. The coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, which can be electrical, mechanical or other forms, and is used for information interaction between devices, units or modules. The processor 1110 can operate in cooperation with the memory 1130. The processor 1110 can execute the program instructions stored in the memory 1130.

[0470] In the present application, the memory 1130 can be integrated into the processor 1110, and the processor 1110 and the memory 1130 can also be separately established, which is not limited in the present application.

[0471] It should be understood that the coupling in the embodiments of the present application is indirect coupling or communication connection between devices, units or modules, which can be electrical, mechanical or other forms, for information interaction between devices, units or modules. The processor 1110 can operate in cooperation with the memory 1130. The specific connection medium between the processor 1110, the communication interface 1120 and the memory 1130 is not limited in the embodiments of the present application. In FIG. 11, the processor 1110, the communication interface 1120 and the memory 1130 are connected through the bus 1140. The bus 1140 is represented by a thick line in FIG. 11, and the connection mode between other components is only schematically illustrated and is not limited. The bus can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For convenience of representation, only one thick line is used to represent the bus in FIG. 11, but it does not mean that there is only one bus or only one type of bus.

[0472] FIG. 12 is another schematic diagram of a communication device according to an embodiment of the present application.

[0473] As shown in FIG. 12, the communication device 1200 includes at least one processor 1210. The at least one processor 1210 can be used to execute computer programs or instructions in the memory to implement the steps performed by the terminal or the steps performed by the base station in any of the embodiments shown in FIG. 3, FIG. 5 to FIG. 8.

[0474] Optionally, the communication device 1200 can further include at least one memory 1220 for storing instructions executed by the processor 1210 or storing input data required by the processor 1210 to run instructions or storing data generated after the processor 1210 runs instructions. The at least one processor 1210 and the at least one memory 1220 can be separately arranged. For example, each memory can be connected with one or more processors, so that the connected processor can read information from the memory, store and / or write information in the memory. Alternatively, the at least one processor 1210 and the at least one memory 1220 can be integrated together, for example, one or more memories can be integrated in one processor.

[0475] Optionally, the communication apparatus 1200 further includes an interface circuit 1230, which can be used for transmitting data and / or signaling. The at least one processor 1210 and the interface circuit 1230 are coupled to each other. It can be understood that the interface circuit 1230 can be a transceiver, an input / output circuit, a bus, a module, a pin or other types of communication interfaces, wherein the input circuit in the input / output circuit can be used for receiving, and the output interface can be used for transmitting.

[0476] Optionally, the communication apparatus 1200 further includes a power supply circuit 1240, which can be used for supplying power for the communication apparatus 1200.

[0477] It can be understood that when the communication apparatus 1200 is a communication device, the interface circuit 1230 can be a transceiver, specifically including a transmitter for transmitting signals and a receiver for receiving signals. When the communication apparatus 1200 is a chip applied to a communication device, the interface circuit 1230 can be an input / output circuit, a bus, a module, a pin or other types of communication interfaces, wherein the input circuit in the input / output circuit can be used for receiving, and the output interface can be used for transmitting.

[0478] It should also be understood that the coupling in the embodiments of the present application is an indirect coupling or communication connection between the devices, units or modules, which can be electrical, mechanical or other forms, for information interaction between the devices, units or modules. The specific connection medium between the at least one processor 1210, the at least one memory 1220, the interface circuit 1230 and the power supply circuit 1240 in the embodiments of the present application is not limited. In FIG. 12, the processor 1210, the memory 1220, the interface circuit 1230 and the power supply circuit 1240 are connected through the bus 1250. The bus 1250 is represented by a thick line in FIG. 12, and the connection mode between other components is only schematically illustrated and is not limited. The bus can be a PCI bus or an EISA bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For convenience of representation, only one thick line is used in FIG. 12, but it does not mean that there is only one bus or only one type of bus.

[0479] The present application also provides a computer program product, which includes a computer program (also referred to as code or instructions), when the computer program is executed, can implement the steps performed by the terminal or the steps performed by the base station in the method described in any of the embodiments shown in FIG. 3, FIG. 5 to FIG. 8.

[0480] The application further provides a computer readable storage medium storing a computer program (also referred to as code or instructions). When the computer program is executed, steps performed by a terminal or steps performed by a base station in the method described in any of the embodiments shown in FIG. 3, FIG. 5 to FIG. 8 can be implemented.

[0481] The embodiments of the application provide a communication system, which includes a terminal and an NTN device (for example, a satellite base station) as described above.

[0482] It should be understood that the processor in the embodiments of the application can be an integrated circuit chip with a signal processing capability. In the implementation process, each step of the method embodiments described above can be completed by integrated logic circuits or instructions in the form of software in the processor. The processor described above can be a general processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. Each method, step and logic block diagram disclosed in the embodiments of the application can be implemented or executed. The general processor can be a microprocessor or the processor can be any conventional processor. The steps of the method disclosed in conjunction with the embodiments of the application can be directly embodied as a hardware code processor for execution, or a combination of hardware and software modules in the code processor for execution. The software module can be located in a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register or other mature storage medium in the art. The storage medium is located in the memory, and the processor reads the information in the memory and combines the hardware to complete the steps of the method.

[0483] It should also be understood that the memory in the embodiments of the present application can be a volatile memory or a nonvolatile memory, or can include both volatile and nonvolatile memory. Among them, the nonvolatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically EPROM (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM) used as an external cache. By way of example, and not limitation, many forms of RAM can be used, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory of the system and method described herein is intended to include, but not be limited to, these and any other suitable types of memory.

[0484] The terms "unit", "module" and the like used in the specification can be used to represent a computer-related entity, hardware, firmware, a combination of hardware and software, software, or software in execution. The units and modules in the embodiments of the present application have the same meaning and can be used interchangeably.

[0485] Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and steps described in connection with the embodiments disclosed herein can be implemented as electronic hardware, computer software, or combinations of both. The choice of hardware or software, or combinations of both, would be dependent on the specific application and design constraints imposed on the overall system. Skilled artisans can implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application. In several embodiments provided in the present application, it will be apparent that the disclosed devices, apparatuses, and methods can be implemented in other ways. For example, the described device embodiments are merely illustrative, and the division into units is merely a logical function division, and actual implementation can have another division, for example, multiple units or components can be combined or integrated into another system, or some features can be omitted or not implemented. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0486] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., they can be located in one place or distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiments.

[0487] In addition, the functional units in each of the embodiments of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit.

[0488] In the above embodiments, the functions of the various functional units can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, the whole or part of the computer program instructions (program) can be implemented in the form of a computer program product. When the computer program instructions (program) are loaded and executed on a computer, the whole or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions can be transmitted from one website site, computer, server or data center to another website site, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) manner. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes one or more available media sets. The available media can be magnetic media (for example, floppy disk, hard disk, magnetic tape), optical media (for example, digital video disc (DVD)), or semiconductor media (for example, solid state disk (SSD)) and the like.

[0489] The functions, if implemented in the form of software functional units and sold or used as independent products, can be stored in a computer-readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the part that contributes to the technology or part of the technical solutions can be embodied in the form of a software product, which is stored in a storage medium and includes a number of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the embodiments of the present application. The foregoing storage medium includes: U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk and various media that can store program codes.

[0490] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for measuring relaxation in a non-terrestrial network (NTN), characterized in that, The method includes: Obtain a measurement relaxation criterion, which is used to indicate a reference location associated with the NTN cell to be measured; Based on the aforementioned measurement relaxation criteria, perform measurement relaxation for one or more of the following: air interface link detection (RLM), beam failure detection (BFD), or radio resource management (RRM).

2. The method as described in claim 1, characterized in that, The terminal is in a connected state, and the NTN cell to be measured includes the terminal's NTN serving cell and / or the neighboring cells of the NTN serving cell, and, Based on the measurement relaxation criteria, the measurement relaxation is performed on one or more of the following: RLM, BFD, or RRM, including: Based on the aforementioned measurement relaxation criteria, one or more of the following measurement relaxations are performed on the NTN serving cell: RLM, BFD, or RRM, and / or, measurement relaxations are performed on the neighboring cell's RRM.

3. The method as described in claim 2, characterized in that, The measurement relaxation criteria are also used to indicate a first distance threshold, which is associated with the NTN serving cell; and Based on the measurement relaxation criteria, the measurement relaxation performed on one or more of the following for the NTN serving cell: RLM, BFD, or RRM, and / or, the measurement relaxation performed on the RRM of the neighboring cell, includes: If the distance between the terminal and the NTN serving cell is less than or equal to the first distance threshold, one or more of the following measurement relaxations are performed on the NTN serving cell: RLM, BFD, or RRM, and / or, measurement relaxations are performed on the RRM of the neighboring cell. The distance between the terminal and the NTN serving cell is determined based on the reference location.

4. The method as described in claim 2, characterized in that, The measurement relaxation criteria are also used to indicate a first distance threshold, the ephemeris information of the serving satellite, and the satellite epoch time, wherein the first distance threshold and the serving satellite are associated with the NTN serving cell; and Based on the measurement relaxation criteria, the measurement relaxation performed on one or more of the following for the NTN serving cell: RLM, BFD, or RRM, and / or, the measurement relaxation performed on the RRM of the neighboring cell, includes: If the distance between the terminal and the NTN serving cell is less than or equal to the first distance threshold, one or more of the following measurement relaxations are performed on the NTN serving cell: RLM, BFD, or RRM, and / or, measurement relaxations are performed on the RRM of the neighboring cell. The distance between the terminal and the NTN serving cell is determined based on the reference location, the satellite epoch time, and the ephemeris information.

5. The method as described in claim 2, characterized in that, The reference location includes the reference location of the NTN serving cell and the reference location of at least one first neighboring cell, wherein the first neighboring cell is any one of the neighboring cells of the NTN serving cell. The measurement relaxation parameter is also used to indicate a first distance threshold and at least one second distance threshold, wherein the first distance threshold is associated with the NTN serving cell and the at least one second distance threshold is associated with at least one first neighboring cell. as well as, Based on the measurement relaxation criteria, the measurement relaxation performed on one or more of the following for the NTN serving cell: RLM, BFD, or RRM, and / or, the measurement relaxation performed on the RRM of the neighboring cell, includes: If the distance between the terminal and the NTN serving cell is less than or equal to the first distance threshold, and the distance between the terminal and the first neighboring cell is greater than or equal to the second distance threshold, one or more of the following measurement relaxations are performed on the NTN serving cell: RLM, BFD, or RRM, and / or, measurement relaxations are performed on the RRM of the neighboring cell. The distance between the terminal and the NTN serving cell is determined based on the reference location of the NTN serving cell, and the distance between the terminal and the first neighboring cell is determined based on the reference location of the first neighboring cell.

6. The method as described in claim 2, characterized in that, The reference location includes the reference location of the NTN serving cell and the reference location of at least one first neighboring cell, wherein the first neighboring cell is any one of the neighboring cells of the NTN serving cell; the measurement relaxation parameter is also used to indicate a first distance threshold, the ephemeris information and satellite epoch time of the serving satellite, as well as the ephemeris information of at least one neighboring satellite of the serving satellite and at least one second distance threshold, wherein the first distance threshold and the serving satellite are associated with the NTN serving cell, and at least one second distance threshold is associated with at least one first neighboring cell; as well as, Based on the measurement relaxation criteria, the measurement relaxation performed on one or more of the following for the NTN serving cell: RLM, BFD, or RRM, and / or, the measurement relaxation performed on the RRM of the neighboring cell, includes: If the distance between the terminal and the NTN serving cell is less than or equal to the first distance threshold, and the distance between the terminal and the first neighboring cell is greater than or equal to the second distance threshold, one or more of the following measurement relaxations are performed on the NTN serving cell: RLM, BFD, or RRM, and / or, measurement relaxations are performed on the RRM of the neighboring cell. The distance between the terminal and the NTN serving cell is determined based on the reference position of the NTN serving cell, the satellite epoch time, and the ephemeris information of the serving satellite. The distance between the terminal and the first neighboring cell is determined based on the reference position of the first neighboring cell, the satellite epoch time, and the ephemeris information of the neighboring satellite.

7. The method as described in claim 2, characterized in that, The measurement relaxation criteria are also used to indicate distance variation thresholds and duration thresholds, which are associated with the NTN serving cell; and... Based on the measurement relaxation criteria, the measurement relaxation performed on one or more of the following for the NTN serving cell: RLM, BFD, or RRM, and / or, the measurement relaxation performed on the RRM of the neighboring cell, includes: Within the duration threshold, if the change in distance between the terminal and the NTN serving cell is less than or equal to the distance change threshold, one or more of the following measurement relaxations are performed on the NTN serving cell: RLM, BFD, or RRM, and / or, measurement relaxations are performed on the neighboring cell's RRM. The distance between the terminal and the NTN serving cell is determined based on the reference location.

8. The method as described in claim 2, characterized in that, The measurement relaxation parameters are also used to indicate the ephemeris information, satellite epoch time, distance change threshold, and duration threshold of the serving satellite, wherein the serving satellite, the distance change threshold, and the duration threshold are associated with the NTN serving cell; as well as, Based on the measurement relaxation criteria, the measurement relaxation performed on one or more of the following for the NTN serving cell: RLM, BFD, or RRM, and / or, the measurement relaxation performed on the RRM of the neighboring cell, includes: Within the duration threshold, if the change in distance between the terminal and the NTN serving cell is less than or equal to the distance change threshold, one or more of the following measurement relaxations are performed on the NTN serving cell: RLM, BFD, or RRM, and / or, measurement relaxations are performed on the neighboring cell's RRM. The distance between the terminal and the NTN serving cell is determined based on the reference location, the satellite epoch time, and the ephemeris information.

9. The method as described in claim 1, characterized in that, The terminal is in an idle or inactive state, and the NTN cell to be measured includes the terminal's NTN serving cell and / or the neighboring cells of the NTN serving cell, and, Based on the measurement relaxation criteria, the measurement relaxation is performed on one or more of the following: RLM, BFD, or RRM, including: Based on the aforementioned measurement relaxation criteria, measurement relaxation of the RRM for the neighboring cells is performed.

10. The method as described in claim 9, characterized in that, The measurement relaxation criteria are also used to indicate a third distance threshold, which is associated with the NTN serving cell; as well as, The step of performing measurement relaxation of the RRM for the neighboring cells based on the measurement relaxation criteria includes: If the distance between the terminal and the NTN serving cell is less than or equal to the third distance threshold, the measurement relaxation of the RRM of the neighboring cell is performed; The distance between the terminal and the NTN serving cell is determined based on the reference location.

11. The method as described in claim 9, characterized in that, The measurement relaxation criteria are also used to indicate a third distance threshold, ephemeris information of the serving satellite, and satellite epoch time, wherein the third distance threshold and the serving satellite are associated with the NTN serving cell; as well as, The step of performing measurement relaxation of the RRM for the neighboring cells based on the measurement relaxation criteria includes: If the distance between the terminal and the NTN serving cell is less than or equal to the third distance threshold, the measurement relaxation of the RRM of the neighboring cell is performed; The distance between the terminal and the NTN serving cell is determined based on the reference location, the satellite epoch time, and the ephemeris information.

12. The method as described in claim 9, characterized in that, The reference location includes the reference location of the NTN serving cell and the reference location of at least one first neighboring cell, wherein the first neighboring cell is any one of the neighboring cells of the NTN serving cell; the measurement relaxation parameter is also used to indicate a third distance threshold and at least one fourth distance threshold, wherein the third distance threshold is associated with the NTN serving cell and the at least one fourth distance threshold is associated with at least one first neighboring cell. as well as, The step of performing measurement relaxation of the RRM for the neighboring cells based on the measurement relaxation criteria includes: If the distance between the terminal and the NTN serving cell is less than or equal to the third distance threshold, and the distance between the terminal and the first neighboring cell is greater than or equal to the fourth distance threshold, then the measurement relaxation of RRM for the neighboring cell is performed. The distance between the terminal and the NTN serving cell is determined based on the reference location of the NTN serving cell, and the distance between the terminal and the first neighboring cell is determined based on the reference location of the first neighboring cell.

13. The method as described in claim 9, characterized in that, The reference location includes the reference location of the NTN serving cell and the reference location of at least one first neighboring cell, wherein the first neighboring cell is any one of the neighboring cells of the NTN serving cell; the measurement relaxation parameter is also used to indicate a third distance threshold, the ephemeris information and satellite epoch time of the serving satellite, as well as the ephemeris information of at least one neighboring satellite of the serving satellite and at least one fourth distance threshold, wherein the third distance threshold is associated with the serving satellite and the NTN serving cell, and the at least one fourth distance threshold is associated with at least one first neighboring cell; as well as, The step of performing measurement relaxation of the RRM for the neighboring cells based on the measurement relaxation criteria includes: If the distance between the terminal and the NTN serving cell is less than or equal to the third distance threshold, and the distance between the terminal and the first neighboring cell is greater than or equal to the fourth distance threshold, then the measurement relaxation of RRM for the neighboring cell is performed. The distance between the terminal and the NTN serving cell is determined based on the reference position of the NTN serving cell, the satellite epoch time, and the ephemeris information of the serving satellite. The distance between the terminal and the first neighboring cell is determined based on the reference position of the first neighboring cell, the satellite epoch time, and the ephemeris information of the neighboring satellite.

14. The method as described in claim 9, characterized in that, The measurement relaxation criteria are also used to indicate distance change thresholds and duration thresholds, which are associated with the NTN serving cell; as well as, The step of performing measurement relaxation of the RRM for the neighboring cells based on the measurement relaxation criteria includes: Within the duration threshold, if the change in distance between the terminal and the NTN serving cell is less than or equal to the distance change threshold, the measurement relaxation of RRM for the neighboring cell is performed. The distance between the terminal and the NTN serving cell is determined based on the reference location.

15. The method as described in claim 9, characterized in that, The measurement relaxation parameters are also used to indicate the ephemeris information, satellite epoch time, distance change threshold, and duration threshold of the serving satellite, wherein the serving satellite, the distance change threshold, and the duration threshold are associated with the NTN serving cell; as well as, The step of performing measurement relaxation of the RRM for the neighboring cells based on the measurement relaxation criteria includes: Within the duration threshold, if the change in distance between the terminal and the NTN serving cell is less than or equal to the distance change threshold, the measurement relaxation of RRM for the neighboring cell is performed. The distance between the terminal and the NTN serving cell is determined based on the reference location, the satellite epoch time, and the ephemeris information.

16. The method according to any one of claims 1 to 15, characterized in that, The measurement relaxation criterion is also used to indicate first time information, which indicates the time at which the measurement relaxation is performed.

17. The method as described in claim 16, characterized in that, The first time information includes: A first time point, wherein the first time point is used to indicate that a measurement of relaxation was performed prior to the first time point; or, A first duration and a second time point, wherein the first duration and the second time point are used to indicate that a measurement of relaxation is performed within the first duration starting from the second time point; or, A third time point and a fourth time point, wherein the third time point is earlier than the fourth time point, are used to indicate that a measurement of relaxation was performed between the third time point and the fourth time point.

18. The method according to any one of claims 1 to 15, characterized in that, The measurement relaxation criteria are further used to indicate first parameter information and / or second parameter information; wherein the first parameter information is used to assess whether the serving cell where the terminal is located meets the good cell service quality standard or the non-cell edge standard, and the second parameter information is used to assess whether the low mobility standard is met; and... Based on the measurement relaxation criteria, the measurement relaxation is performed on one or more of the following: RLM, BFD, or RRM, including: Based on the reference location, and the first parameter information and / or the second parameter information, perform a measurement relaxation of one or more of the following: RLM, BFD, or RRM.

19. The method as described in claim 16 or 17, characterized in that, The measurement relaxation criteria are further used to indicate first parameter information and / or second parameter information; wherein the first parameter information is used to assess whether the serving cell where the terminal is located meets the good cell service quality standard or the non-cell edge standard, and the second parameter information is used to assess whether the low mobility standard is met; and... Based on the measurement relaxation criteria, the measurement relaxation is performed on one or more of the following: RLM, BFD, or RRM, including: Based on the reference location and the first time information, as well as the first parameter information and / or the second parameter information, perform a measurement relaxation of one or more of the following: RLM, BFD, or RRM.

20. The method according to any one of claims 1 to 19, characterized in that, The method further includes: Report one or more of the following measured relaxation states: RLM, BFD, or RRM.

21. A communication device, characterized in that, Includes modules for implementing the method as described in any one of claims 1 to 20.

22. A communication device, characterized in that, Including processor and memory, among which, The memory is used to store computer programs; The processor is used to invoke the computer program to cause the device to implement the method as described in any one of claims 1 to 20.

23. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program or instructions that, when executed by a computer, implement the method as described in any one of claims 1 to 20.

24. A computer program product, characterized in that, The computer program product includes instructions that, when executed by a computer, implement the method as described in any one of claims 1 to 20.

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