Communication method, device and system, and storage medium

Abstract

The present disclosure relates to a communication method, device and system, and a storage medium. The communication method comprises: a terminal determining first information, wherein the first information is used for the terminal to perform reselection from a serving cell of a first network type to a cell of a second network type; and according to the first information, determining whether to perform cell reselection measurement on a carrier where the cell of the second network type is located. In this way, a terminal can reside or switch between a cell of a first network type and a cell of a second network type, such that the terminal can obtain better network services.

Description

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

[0001] The present disclosure relates to the field of communication technology, and in particular to a communication method, communication equipment, system and storage medium. Background Art

[0002] Non-Terrestrial Network (NTN) is a new air interface technology developed by the 3rd Generation Partnership Project (3GPP) for direct communication between terminals and satellites. NTN can be combined with terrestrial networks (TN), such as 4G and 5G terrestrial mobile communication networks, to provide ubiquitous network coverage. Connecting multiple dimensions—air, space, land, and sea—NTN forms an integrated ubiquitous access network, enabling on-demand access in all scenarios.

[0003] Summary of the Invention

[0004] The embodiments of the present disclosure provide a communication method, a communication device, a system, and a storage medium.

[0005] According to a first aspect of an embodiment of the present disclosure, a communication method is provided, which is executed by a terminal. The method includes:

[0006] determining first information, where the first information is used by the terminal to reselect from a serving cell of a first network type to a cell of a second network type;

[0007] Determine whether to perform cell reselection measurement on the carrier where the cell of the second network type is located according to the first information.

[0008] As can be seen, by determining the first information used by the terminal to reselect from the serving cell of the first network type to the cell of the second network type, and based on the first information, determining whether to perform cell reselection measurements on the carrier where the cell of the second network type is located. This standardizes the determination of whether to perform cross-network cell reselection measurements based on the first information, avoiding the problem of high power consumption caused by real-time measurements. Furthermore, this standard allows the terminal to reside or switch back and forth between the cell of the first network type and the cell of the second network type, thereby enabling the terminal to obtain better network service.

[0009] In some embodiments, the first network type is a terrestrial network (TN), and the second network type is a non-terrestrial network (NTN).

[0010] It can be seen that, when the serving cell of the terminal is the terrestrial network TN, it can be determined whether to perform cross-network cell reselection measurement from the terrestrial network TN to the non-terrestrial network NTN according to the first information.

[0011] In some embodiments, the first information includes a first threshold value;

[0012] The determining, according to the first information, whether to perform cell reselection measurement on the carrier where the cell of the second network type is located includes:

[0013] The first signal strength of the serving cell is greater than the first threshold value, and cell reselection measurement is not performed on the carrier where the cell of the second network type is located.

[0014] This shows that the specification stipulates that when the serving cell of the terminal is the terrestrial network TN and the first signal strength of the serving cell of the terminal is greater than the first threshold, cell reselection measurement is not performed on the carrier where the NTN cell is located.

[0015] In some embodiments, the first information includes a first threshold value and a second threshold value, wherein the first threshold value is greater than the second threshold value;

[0016] The determining, according to the first information, whether to perform cell reselection measurement on the carrier where the cell of the second network type is located includes:

[0017] If the first signal strength of the serving cell is less than the first threshold value and the first signal strength is greater than the second threshold value, a relaxed cell reselection measurement is performed on the carrier where the cell of the second network type is located.

[0018] It can be seen from this that the specification stipulates that when the service cell of the terminal is a terrestrial network TN, and the first signal strength of the service cell of the terminal is less than the first threshold value, and the first signal strength is greater than the second threshold value, relaxed cell reselection measurement is performed on the carrier where the NTN cell is located.

[0019] In some implementations, performing relaxed cell reselection measurement on the carrier where the cell of the second network type is located includes:

[0020] performing, according to the scaling factor, a relaxed cell reselection measurement on a carrier where the cell of the second network type is located;

[0021] The scaling factor is obtained by any of the following methods:

[0022] Obtained according to the received first system information block SIB message configuration;

[0023] Determined according to the agreement;

[0024] pre-configured in the terminal.

[0025] It can be seen that the scaling factor can be obtained in different ways to meet different scenario requirements, and relaxed cell reselection measurement can be performed on the carrier where the cell of the second network type is located according to the scaling factor.

[0026] In some embodiments,

[0027] The first information includes a second threshold value;

[0028] The determining, according to the first information, whether to perform cell reselection measurement on the carrier where the cell of the second network type is located includes:

[0029] The first signal strength of the serving cell is less than the second threshold value, and a cell reselection measurement is performed on the carrier where the cell of the second network type is located.

[0030] This shows that the specification specifies that when the serving cell of the terminal is the terrestrial network TN and the first signal strength of the serving cell of the terminal is less than the second threshold, cell reselection measurement is performed on the carrier where the NTN cell is located.

[0031] In some implementations, the first network type is NTN, and the second network type is TN.

[0032] It can be seen that when the serving cell of the terminal is the non-terrestrial network NTN, it can be determined whether to perform inter-network cell reselection measurement from the non-terrestrial network NTN to the terrestrial network TN according to the first information.

[0033] In some embodiments, the first information includes second information, and the second information indicates TN network coverage;

[0034] The determining, according to the first information, whether to perform cell reselection measurement on the carrier where the cell of the second network type is located includes:

[0035] The terminal is within the coverage of the TN network and performs cell reselection measurement on a carrier where a cell of the second network type is located to obtain a second signal strength.

[0036] This shows that the specification stipulates that when the serving cell of the terminal is a non-terrestrial network NTN and the terminal is determined to be within the coverage of the TN network, a cell reselection measurement can be performed on the carrier where the TN cell is located to obtain a second signal strength.

[0037] In some embodiments, the first information further includes a third threshold value;

[0038] The method further comprises:

[0039] Based at least on the third threshold and the second signal strength, it is determined whether to reselect to a cell of the second network type.

[0040] This shows that the specification specifies that when the serving cell of the terminal is a non-terrestrial network NTN, whether to reselect to a TN cell is determined based at least on the third threshold and the second signal strength.

[0041] In some embodiments, determining whether to reselect to a cell of the second network type based at least on the third threshold and the second signal strength includes:

[0042] The second signal strength is greater than the third threshold, and the cell of the second network type is reselected.

[0043] This shows that, when the serving cell of the terminal is a non-terrestrial network NTN, the terminal can reselect to a TN cell by determining that the second signal strength is greater than the third threshold, thereby obtaining better network service.

[0044] In some implementations, determining whether to reselect to a cell of the second network type based at least on the third threshold and the second signal strength includes:

[0045] If the second signal strength is greater than the first signal strength of the serving cell and the second signal strength is greater than the third threshold, the cell of the second network type is reselected.

[0046] This shows that when the service cell of the terminal is a non-terrestrial network NTN, by determining that the second signal strength is greater than the first signal strength of the service cell and the second signal strength is greater than the third threshold value, the terminal can reselect to the TN cell to obtain better network service.

[0047] In some embodiments, the method further comprises:

[0048] The second signal strength is greater than the first signal strength of the serving cell, and the cell of the second network type is reselected.

[0049] This shows that when the serving cell of the terminal is a non-terrestrial network NTN, the terminal can reselect to the TN by determining that the second signal strength is greater than the first signal strength of the serving cell, thereby obtaining better network service.

[0050] In some embodiments, the number of cells of the second network type is multiple;

[0051] The performing cell reselection measurement on the carrier where the cell of the second network type is located includes:

[0052] Based on the cell priority information carried in the second SIB message, cell reselection measurement is performed on the carrier where each cell of the second network type is located.

[0053] This shows that when the terminal's serving cell is a non-terrestrial network (NTN), cell reselection measurements can be performed on the carriers where each TN cell is located in an orderly manner based on the cell priority information, so as to quickly find the optimal TN cell for reselection and residence.

[0054] In some implementations, the first information is carried in a third SIB message.

[0055] It can be seen that the method of carrying the first information in the SIB message and sending it to the terminal is conducive to flexibly setting, updating, or expanding the first information based on needs, avoiding the problems of inflexible setting, inability to update, and inability to expand when the first information is solidified on the terminal.

[0056] In some embodiments, the first signal strength includes a first synchronization signal reference signal received power SS-RSRP and / or a first synchronization signal reference signal received quality SS-RSRQ.

[0057] In some embodiments, the second signal strength includes a second SS-RSRP and / or a second SS-RSRQ.

[0058] According to a second aspect of an embodiment of the present disclosure, a communication method is provided, which is performed by a network device. The method includes:

[0059] First information is sent to a terminal, where the first information represents configuration information for the terminal to reselect from a serving cell of a first network type to a cell of a second network type.

[0060] In some implementations, the first information includes a first threshold value, which is used by the terminal to determine that the first signal strength of the serving cell is greater than the first threshold value and not to perform cell reselection measurement on the carrier where the cell of the second network type is located.

[0061] In some embodiments, the first information includes a first threshold value and a second threshold value, wherein the first threshold value is greater than the second threshold value, and the first information is used by the terminal to determine that the first signal strength of the serving cell is less than the first threshold value and the first signal strength is greater than the second threshold value, and to perform relaxed cell reselection measurement on the carrier where the cell of the second network type is located.

[0062] In some implementations, the first information includes a second threshold value, and the second threshold value is used by the terminal to determine that the first signal strength of the serving cell is less than the second threshold value, and to perform cell reselection measurement on the carrier where the cell of the second network type is located.

[0063] In some embodiments, the first information includes second information, where the second information indicates a TN network coverage range. The second information is used by the terminal to determine that it is within the TN network coverage range, perform cell reselection measurement on the carrier where the cell of the second network type is located, and obtain a second signal strength.

[0064] In some implementations, the first information further includes a third threshold value, and the first information is used by the terminal to determine whether to reselect to a cell of the second network type based at least on the third threshold value and the second signal strength.

[0065] According to a third aspect of an embodiment of the present disclosure, a terminal is provided, comprising:

[0066] The processing module is configured to determine first information, where the first information is used by the terminal to reselect from a serving cell of the first network type to a cell of the second network type; and determine whether to perform cell reselection measurement on a carrier where the cell of the second network type is located based on the first information.

[0067] According to a fourth aspect of an embodiment of the present disclosure, a network device is provided, comprising:

[0068] The sending module is configured to send first information to the terminal, where the first information represents configuration information used by the terminal to reselect from a serving cell of a first network type to a cell of a second network type.

[0069] According to a fifth aspect of an embodiment of the present disclosure, a communication device is provided, including:

[0070] a memory having a computer program stored thereon;

[0071] A processor is used to execute the computer program in the memory to implement the steps of the communication method described in the first aspect or the second aspect.

[0072] According to a sixth aspect of an embodiment of the present disclosure, a communication system is proposed, comprising a terminal and a network device, wherein the terminal is configured to implement the communication method described in the first aspect, and the network device is configured to implement the communication method described in the second aspect.

[0073] According to a seventh aspect of an embodiment of the present disclosure, a computer-readable storage medium is proposed, wherein the computer-readable storage medium stores computer instructions. When the computer instructions are executed on a communication device, the communication device executes the communication method described in the first aspect or the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following drawings required for describing the embodiments are introduced. The following drawings are merely some embodiments of the present disclosure and do not impose specific limitations on the protection scope of the present disclosure.

[0075] FIG1 is a schematic structural diagram of a communication system according to an embodiment of the present disclosure.

[0076] FIG2 a is an interactive schematic diagram illustrating a communication method according to an embodiment of the present disclosure.

[0077] FIG2 b is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure.

[0078] FIG3 a is a schematic flow chart of a communication method according to an embodiment of the present disclosure.

[0079] FIG3 b is a flow chart of a communication method according to an embodiment of the present disclosure.

[0080] FIG3 c is a flow chart of a communication method according to an embodiment of the present disclosure.

[0081] FIG3 d is a flow chart of a communication method according to an embodiment of the present disclosure.

[0082] FIG4 is a flow chart showing a communication method according to an embodiment of the present disclosure.

[0083] FIG5 is a schematic structural diagram of a terminal provided according to an embodiment of the present disclosure.

[0084] FIG6 is a schematic diagram of the structure of a network device provided according to an embodiment of the present disclosure.

[0085] FIG7 is a schematic structural diagram of a communication device provided according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0086] The present disclosure provides a communication method, communication device, system, and storage medium. In some embodiments, the terms "communication method" and "mobility management method," "mobility management-based measurement method," "cell reselection method," "cell reselection measurement method," and "carrier measurement method" are interchangeable. The terms "communication system" and "mobility management system," "mobility management-based measurement system," "cell reselection system," "cell reselection measurement system," and "carrier measurement system" are interchangeable.

[0087] The embodiments of the present disclosure are not exhaustive and are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0088] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The singular expressions "a," "an," "the," "above," "said," "aforementioned," "this," etc. in the embodiments of the present disclosure also include plural expressions, unless there is a clear contrary indication in the context. The predefined in the embodiments of the present disclosure can be understood as definition, pre-definition, storage, pre-storage, pre-negotiation, pre-configuration, curing, or pre-firing, etc.

[0089] Prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects, and have no limiting effect on the position, order, priority, quantity or content of the described objects. For example, if the described object is a "field", then the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields", and "first" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the described object is a "level", then the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of described objects is not limited by the ordinal number and can be one or more. Taking the "first device" as an example, the number of "devices" can be one or more. Furthermore, the objects modified by different prefixes can be the same or different. For example, if the object being described is a "device," then the "first device" and the "second device" can be devices of the same type or different types. For another example, if the object being described is "information," then the "first information" and the "second information" can be information of the same content or information of different contents. In summary, the use of prefixes such as ordinal numbers in the embodiments of the present disclosure to distinguish between the described objects does not constitute a limitation on the described objects. For a description of the described objects, refer to the contextual description in the claims or embodiments, and the use of such prefixes should not constitute an unnecessary limitation.

[0090] In the embodiments of the present disclosure, "multiple" refers to two or more. In the embodiments of the present disclosure, "and / or" is used to describe the association relationship of associated objects, indicating three relationships that can exist independently. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist at the same time. In the embodiments of the present disclosure, descriptions such as "at least one of Al, A2, ..., An (or at least one, at least one)" include the situation where any one of Al, A2, ..., An exists alone, and also include any combination of any multiple of Al, A2, ..., An, each of which can exist alone; for example, the description of "at least one of A, B, C" includes the situation where A exists alone, B exists alone, C exists alone, A and B are combined, A and C are combined, B and C are combined, and A, B and C are combined.

[0091] In some embodiments, descriptions such as "in one case A, in another case B," or "in response to one case A, in response to another case B," may include the following technical solutions depending on the situation: executing A independently of B (in some embodiments, A); executing B independently of A (in some embodiments, B); selectively executing A and B (in some embodiments, selecting between A and B); and executing both A and B (in some embodiments, A and B). The same applies when there are more branches, such as A, B, and C.

[0092] In some embodiments, terms such as "in response to...", "in response to determining...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0093] In some embodiments, “including A,” “comprising A,” “used to indicate A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0094] In some embodiments, terms such as "device," "equipment," "system," "chip," and "chip system" may be used interchangeably.

[0095] In some embodiments, the terms "access network device (AN device)", "radio access network device (RAN device)", "base station (BS)", "radio base station", "access point", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "carrier", "component carrier", "bandwidth part (BWP)" and the like may be used interchangeably.

[0096] In some embodiments, the terms "terminal", "terminal device", "user equipment (UE)", "user terminal", "mobile station (MS)", "mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, etc. can be used interchangeably.

[0097] In some embodiments, the terminal may be replaced by an access network device, a core network device, or a network device. In this case, the access network device, the core network device, or the network device may have a structure that has all or part of the functions of the terminal.

[0098] In some embodiments, "obtain", "get", "obtain", "receive", "transmit", "bidirectional transmission", "send and / or receive" can be interchangeable, and can be interpreted as receiving from other entities, obtaining from a protocol, obtaining by self-processing, autonomous implementation, etc.

[0099] In some embodiments, terms such as "send", "transmit", "report", "download", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0100] In some embodiments, "predetermined" and "preset" can be interpreted as pre-specified in a protocol, etc., or can be interpreted as a pre-set action performed by a device, etc.

[0101] In some embodiments, determining may be interpreted as judging, calculating, computing, processing, deriving, investigating, searching, looking up, retrieving, ascertaining, receiving, transmitting, inputting, outputting, accessing, resolving, selecting, choosing, establishing, comparing, “assuming,” “expecting,” “considering,” broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, and the like, but is not limited thereto.

[0102] It should be noted that all actions of acquiring signals, information or data in the present disclosure are carried out in compliance with the corresponding data protection laws and policies of the country where they are located and with the authorization given by the owner of the corresponding device.

[0103] Although operations are described in a particular order in the accompanying drawings in the disclosed embodiments, this should not be construed as requiring that the operations be performed in the particular order shown or in a serial order, or that all of the operations shown be performed to obtain the desired result. In certain circumstances, multitasking and parallel processing may be advantageous. Furthermore, sending multiple messages via the same message may also be advantageous.

[0104] In NTN-TN mobility scenarios, UEs may need to reside or handover back and forth between NTN and TN networks, necessitating enhancements to NTN-TN mobility management. When the UE is in Idle or Inactive state, if it resides on the TN network, it may not perform cell reselection measurements on the NTN carrier to save power. Furthermore, if the UE resides on the NTN network and TN network coverage becomes available, it may prioritize reselecting to a TN network cell. Therefore, it is necessary to study the corresponding measurement behavior of the UE in NTN-TN mobility management scenarios.

[0105] In view of this, embodiments of the present disclosure provide a communication method, a communication device, a system, and a storage medium to standardize cell reselection measurements across network types.

[0106] FIG1 is a schematic structural diagram of a communication system 100 according to an embodiment of the present disclosure.

[0107] As shown in FIG. 1 , a communication system 100 includes a terminal 101 , a first network device 102 , and a second network device 103 .

[0108] In some embodiments, the first network device 102 and the second network device 103 may be access network devices belonging to different network types (e.g., different systems / heterogeneous systems). For example, the first network device 102 may be a base station of a terrestrial network (TN), which may be referred to as ground-based in the present disclosure. For example, the second network device 103 may be a base station of a non-terrestrial network (NTN), which may be referred to as space-based in the present disclosure. Similarly, the first network device 102 may be space-based, and the second network device 103 may be ground-based. This disclosure is not limited to this.

[0109] In some embodiments, both the first network device 102 and the second network device 103 may be space-based or ground-based.

[0110] In some embodiments, the terminal 101 is, for example, a terminal, a user equipment (UE), a subscriber unit (Subscriber Unit), a mobile station, a station, a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and at least one of a wireless terminal device in a smart home, but is not limited thereto.

[0111] In some embodiments, the first network device 102 (or the second network device 103) may include at least one of an access network device and a core network device. Optionally, the access network device is, for example, a node or device that connects a terminal to a wireless network, such as a Radio Access Network (RAN). The access network equipment may include at least one of the evolved NodeB (eNB), next generation evolved NodeB (ng-eNB), next generation NodeB (gNB), node B (NB), home node B (HNB), home evolved nodeB (HeNB), wireless backhaul equipment, radio network controller (RNC), base station controller (BSC), base transceiver station (BTS), base band unit (BBU), mobile switching center, base station in 6G communication system, open base station (Open RAN), cloud base station (Cloud RAN), base station in other communication systems, and access node in wireless fidelity (WiFi) system, but is not limited thereto. Optionally, the first network device 102 (or the second network device 103) in the embodiment of the present disclosure may include at least one of the following various forms of base stations, for example: a macro base station, a micro base station (also called a small station), a relay station, an access point, a 5G base station or a future base station, a satellite, a transmission point (Transmitting and Receiving Point, TRP), a transmission point (Transmitting Point, TP), a mobile switching center, and device-to-device (D2D), machine-to-machine (M2M), Internet of Things (IoT), vehicle-to-everything (V2X) or other devices that assume the function of a base station in a communication system, etc., and the embodiment of the present disclosure does not specifically limit this.

[0112] In some embodiments, the technical solution of the present disclosure can be applied to the Open RAN architecture. In this case, the interfaces between or within the access network devices involved in the embodiments of the present disclosure can be transformed into internal interfaces of the Open RAN, and the processes and information interactions between these internal interfaces can be implemented through software or programs.

[0113] In some embodiments, the access network device can be composed of a centralized unit (CU) and a distributed unit (DU), where the CU can also be called a control unit. The CU-DU structure can be used to split the protocol layer of the access network device, with the functions of some protocol layers centrally controlled by the CU, and the functions of the remaining part or all of the protocol layers distributed in the DU, which is centrally controlled by the CU, but is not limited to this.

[0114] In some embodiments, a core network device may be a device including one or more network elements, or may be multiple devices or device groups, each including all or part of the one or more network elements. The network element may be virtual or physical. The core network may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC), but is not limited thereto.

[0115] The embodiments of the present disclosure can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), future radio access (FRA), new radio access technology (RAT), new radio (NR), new radio access (NX), future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), Public Land Mobile Network (PLMN) networks, Device-to-Device (D2D) systems, Machine-to-Machine (M2M) systems, Internet of Things (IoT) systems, Vehicle-to-Everything (V2X), systems utilizing other communication methods, and next-generation systems based on and extending these methods. Furthermore, a combination of multiple systems (e.g., a combination of LTE or LTE-A with NR) may also be employed.

[0116] It can be understood that the communication system 100 described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution provided by the embodiment of the present disclosure. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution provided by the embodiment of the present disclosure is also applicable to similar technical problems.

[0117] The following embodiments of the present disclosure can be applied to the communication system 100 shown in Figure 1, or part of the entities, but are not limited thereto. The entities shown in Figure 1 are examples, and the communication system 100 may include all or part of the entities in Figure 1. For example, it may include the terminal 101 and the first network device 102 in Figure 1. For example, it may include the terminal 101 and the second network device 103 in Figure 1. For example, it may include the terminal 101, the first network device 102, and the second network device 103 in Figure 1. In addition, the communication system 100 may also include other entities other than Figure 1, and the number of each entity is arbitrary. The connection relationship between the entities is an example, and the entities may be connected or disconnected, and the connection may be in any manner, which may be a direct connection or an indirect connection, and may be a wired connection or a wireless connection. In addition, the names of the communication system and the entities are not limited.

[0118] FIG2a is an interactive diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG2a, the embodiment of the present disclosure relates to a communication method, which is used in a communication system 100. The method includes:

[0119] In step S21 , the terminal 101 determines that the first network type of the serving cell of the terminal 101 is a terrestrial network TN.

[0120] The serving cell refers to the cell to which the terminal is currently connected, that is, the cell to which the terminal is currently receiving and sending data. In some embodiments, the serving cell may also be referred to as a local cell or a current cell.

[0121] In some embodiments, if the first network type of the terminal's serving cell is a terrestrial network TN, the terminal can receive any legal information sent by a first network device in the TN, such as a ground station. Correspondingly, the first network device in the TN can also send any legal information to the terminal.

[0122] It should be noted that, when the first network type is a terrestrial network TN, the second network type in the subsequent steps S22 to S243 and in the optional implementations of each of the steps S22 to S243 is a non-terrestrial network NTN.

[0123] In some embodiments, step S21 is an optional step rather than a step that must be performed. In some embodiments, step S21 can be omitted or replaced.

[0124] In step S22 , the first network device 102 in the TN sends first information to the terminal 101 .

[0125] In some embodiments, the first network device in the TN carries the first information in a third system information block (SIB) message and sends it to the terminal.

[0126] In some embodiments, the third system information block SIB may be a system information block type 2 SIB 2 message.

[0127] It can be seen that the method of sending the first information to the terminal by carrying the first information in the SIB message through the first network device in the TN is conducive to flexibly setting, updating, or expanding the first information based on needs, avoiding the problem of inflexible setting, inability to update, and inability to expand due to solidifying the first information on the terminal.

[0128] In step S23 , the terminal 101 receives the first information sent by the first network device 102 .

[0129] In some embodiments, since the first network type of the serving cell of the terminal is a terrestrial network TN, the terminal can receive the first information sent by a first network device in the TN, such as a ground base.

[0130] Optionally, the first information sent by the first network device in the TN to the terminal includes at least one of a first threshold value and a second threshold value, wherein the first threshold value is greater than the second threshold value.

[0131] Illustratively, the first information includes a first threshold value.

[0132] Illustratively, the first information includes the second threshold value.

[0133] Illustratively, the first information includes a first threshold value and a second threshold value.

[0134] The sizes of the first threshold value and the second threshold value can be flexibly set according to scenario requirements, and the present disclosure does not limit the first threshold value and the second threshold value.

[0135] In some embodiments, a terminal receives first information sent by a first network device, and the terminal may store the first information. The first information is configuration information for the terminal to reselect from a serving cell of a first network type (TN) to a cell of a second network type (NTN). Based on the first information, it can be determined whether the terminal reselects from the serving cell of the first network type (TN) to the cell of the second network type (NTN). Thus, if the serving cell of the terminal is a terrestrial network (TN), the first information can be used to determine whether to perform cross-network cell reselection measurements from the terrestrial network (TN) to the non-terrestrial network (NTN).

[0136] In some embodiments, the terminal may use the first information when reselecting from a cell of the first network type to a cell of the second network type. For example, the terminal may use the first information when reselecting from a TN cell to an NTN cell. Specifically, the first information may be used to determine whether to perform cell reselection measurements on the carrier where the NTN cell is located. This specification specifies that, when the terminal's serving cell is a terrestrial network (TN), the first information may be used to determine whether to perform cell reselection measurements on the carrier where the NTN cell is located.

[0137] It should be explained that after a certain period of time, a terminal accessing the network stops transmitting data on the user plane and enters the RRC Idle or RRC Inactive state. In this state, the terminal monitors the signal quality of the serving cell and neighboring cells to select the best cell to provide signal service. In other words, in a mobile communication network, when a terminal switches to a cell with a stronger signal or adds a new carrier (component carrier) in carrier aggregation, it needs to measure the signal quality of the serving cell and neighboring cells. The process by which a terminal selects a new cell to reside in is called cell reselection.

[0138] In some embodiments, the terminal monitors the signal quality of the serving cell in real time. For example, the terminal monitors the signal quality of the carrier where the serving cell is located to obtain a first signal strength of the serving cell.

[0139] In some embodiments, the first signal strength includes a first synchronization signal reference signal received power SS-RSRP (Synchronization Signal Reference Signal Received Power).

[0140] In some embodiments, the first signal strength includes a first synchronization signal reference signal received quality SS-RSRQ (Synchronization Signal Reference Signal Received Quality).

[0141] In some embodiments, the first signal strength includes SS-RSRP and SS-RSRQ.

[0142] In some embodiments, the first information may be modified. After the first information is modified, the first network device may send a notification to the terminal indicating that the first information has been modified. Furthermore, the first network device may send the modified first information to the terminal, and the terminal may receive the modified first information.

[0143] In other embodiments, the first network device may broadcast or multicast the modified first information, and the terminal obtains the modified first information from a corresponding broadcast channel.

[0144] In a case where the terminal has the first information, the terminal may determine, according to the first information, whether to perform cell reselection measurement on the carrier where the cell of the second network type is located.

[0145] After step S23 , any one of step S241 , step S242 , and step S243 in step S24 is executed.

[0146] Step S241: When the first signal strength of the serving cell is greater than the first threshold in the first information, the terminal 101 determines not to perform cell reselection measurement on the carrier where the NTN cell of the second network type is located.

[0147] In some embodiments, if the first signal strength of the serving cell of the terminal is greater than the first threshold value in the first information, it indicates that the signal service quality of the serving cell is very good. Therefore, if the terminal determines that the first signal strength of the serving cell is greater than the first threshold value in the first information, the terminal can continue to camp on the serving cell without performing cell reselection measurement on the carrier where the NTN cell of the second network type is located.

[0148] This shows that the specification stipulates that when the serving cell of the terminal is the terrestrial network TN and the first signal strength of the serving cell of the terminal is greater than the first threshold, cell reselection measurement is not performed on the carrier where the NTN cell is located.

[0149] Step S242: When the terminal 101 determines that the first signal strength of the serving cell is less than the first threshold value in the first information and the first signal strength is greater than the second threshold value in the first information, the terminal 101 determines to perform relaxed cell reselection measurement on the carrier where the NTN cell of the second network type is located.

[0150] In some embodiments, when the first signal strength of a terminal's serving cell is less than a first threshold and greater than a second threshold, the signal service quality of the serving cell is considered good. Therefore, upon determining that the first signal strength of the serving cell is less than the first threshold and greater than the second threshold, the terminal can choose to remain in the serving cell or select another cell to camp on. In this case, a relaxed cell reselection measurement can be performed on the carrier containing the NTN cell of the second network type. For example, a relaxed cell reselection measurement can be performed on the carrier containing the NTN cell of the second network type based on a scaling factor.

[0151] It can be seen that this specifies that when the service cell of the terminal is a terrestrial network TN, and the first signal strength of the service cell of the terminal is less than the first threshold value, and the first signal strength is greater than the second threshold value, the relaxed cell reselection measurement is performed on the carrier where the NTN cell is located.

[0152] In some embodiments, the scaling factor may be configured according to a received first system information block (SIB) message. The first SIB message may be sent by the first network device 102 .

[0153] In some embodiments, the scaling factor may be determined according to a protocol agreement.

[0154] In some embodiments, the scaling factor may be pre-configured in the terminal, where pre-configuration may be understood as pre-definition, pre-storage, or pre-negotiation.

[0155] It can be seen that the scale factor can be obtained in different ways to meet the needs of different scenarios.

[0156] It should be noted that the time during which a mobile device suspends communication with its serving cell to measure inter-frequency or inter-system neighboring cells is called a measurement gap (Meas Gap) or reference measurement gap. For example, performing relaxed cell reselection measurements on a carrier based on a scaling factor can involve determining a relaxed measurement gap y2 based on the scaling factor n and the measurement gap y1, such that y2 = n × y1, and performing cell reselection measurements on the carrier based on the relaxed measurement gap y2. This cell reselection measurement method is a relaxed cell reselection measurement method.

[0157] Step S243: When the first signal strength of the serving cell is less than the second threshold value in the first information, the terminal 101 determines to perform cell reselection measurement on the carrier where the NTN cell of the second network type is located.

[0158] In some embodiments, if the first signal strength of the serving cell of the terminal is less than the second threshold value in the first information, it indicates that the signal service quality of the serving cell is poor. Therefore, if the terminal determines that the first signal strength of the serving cell is less than the second threshold value in the first information, it can perform cell reselection measurement on the carrier where the NTN cell of the second network type is located.

[0159] This shows that when the terminal's serving cell is a terrestrial network TN and the first signal strength of the terminal's serving cell is less than the second threshold, cell reselection measurement is performed on the carrier where the NTN cell is located to reselect a cell with better signal service quality.

[0160] The communication method involved in the embodiment of the present disclosure may include at least one of steps S21 to S24 (step S24 includes steps S241, S242, and S243). For example, in the embodiment of the present disclosure, step S241 can be implemented as an independent embodiment, step S242 can be implemented as an independent embodiment, step S243 can be implemented as an independent embodiment, and steps S22, S23, and S241 can be implemented as independent embodiments, but are not limited thereto.

[0161] In the embodiment of the present disclosure, all or part of steps S21 to S24 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0162] In some embodiments, the order of some steps can be swapped, for example, the order of step S21 and step S22 can be swapped, but the present invention is not limited thereto.

[0163] Using the above communication method, based on the first network type of the terminal's serving cell, first information corresponding to the terminal's reselection from a cell of the first network type to a cell of the second network type can be determined. Based on the first information, it can be determined whether to perform cell reselection measurements on the carrier containing the cell of the second network type. This standardizes the determination of whether to perform cross-network cell reselection measurements based on the first information, avoiding the high power consumption caused by real-time measurements. Furthermore, this standardization enables the terminal to camp on or handover back and forth between cells of the first network type and cells of the second network type, thereby enabling the terminal to obtain better signal service quality.

[0164] Figure 2b is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure. Before describing the embodiment of Figure 2b, it should be noted that the embodiment of the present disclosure does not limit the order of the steps in Figure 2b and the steps in Figure 2a. In some embodiments, the terminal 101 may first execute one or more of the steps shown in Figure 2a, and then execute one or more of the steps shown in Figure 2b. In other embodiments, the terminal 101 may first execute one or more of the steps shown in Figure 2b, and then execute one or more of the steps shown in Figure 2a.

[0165] As shown in FIG2b , an embodiment of the present disclosure relates to a communication method, which is used in a communication system 100. The method includes:

[0166] In step S25 , the terminal 101 determines that the first network type of the serving cell of the terminal 101 is a non-terrestrial network NTN.

[0167] In some embodiments, if the first network type of the terminal's serving cell is a non-terrestrial network (NTN), the terminal may receive any legal information sent by a second network device in the NTN, such as a space-based device. The second network device in the NTN may send any legal information to the terminal.

[0168] It should be noted that, when the first network type is a non-terrestrial network NTN, the second network type in the subsequent steps S26 to S293 and in the optional implementation of each of the steps S26 to S293 is a terrestrial network TN.

[0169] In the embodiment of the present disclosure, step S25 is intended to more clearly illustrate how the technical solution of the present disclosure is implemented when the first network type of the serving cell of terminal 101 is a non-terrestrial network (NTN). Step S25 is optional and not required. In some embodiments, step S25 may be omitted or replaced.

[0170] In step S26 , the second network device 103 in the NTN sends the first information to the terminal 101 .

[0171] In some embodiments, the second network device in the NTN carries the first information in a third SIB message and sends it to the terminal.

[0172] In some embodiments, the third SIB message may be a system information block type 19 SIB 19 message.

[0173] It can be seen that the method of sending the first information to the terminal by carrying the first information in the SIB message through the second network device in the NTN is conducive to flexibly setting, updating, or expanding the first information based on needs, avoiding the problems of inflexible setting, inability to update, and inability to expand due to solidifying the first information on the terminal.

[0174] In step S27 , the terminal 101 receives the first information sent by the second network device 103 .

[0175] In some embodiments, since the first network type of the serving cell of the terminal is NTN, the terminal can receive the first information sent by the second network device in the NTN, such as a space-based device.

[0176] In some embodiments, a terminal receives first information sent by a second network device, and the terminal may store the first information. The first information is configuration information for the terminal to reselect from a serving cell of a first network type (NTN) to a cell of a second network type (TN). Based on the first information, it can be determined whether the terminal reselects from the serving cell of the first network type (NTN) to the cell of the second network type (TN). Thus, if the serving cell of the terminal is a non-terrestrial network (NTN), the first information can be used to determine whether to perform cross-network cell reselection measurements from the non-terrestrial network (NTN) to the terrestrial network (TN).

[0177] In some embodiments, the terminal may use the first information when reselecting from a cell of the first network type to a cell of the second network type. For example, the terminal may use the first information when reselecting from an NTN cell to a TN cell. Specifically, the terminal may determine whether to perform cell reselection measurements on the carrier where the TN cell is located based on the first information.

[0178] This shows that the specification stipulates that when the serving cell of the terminal is a non-terrestrial network NTN, it can be determined according to the first information whether to perform cell reselection measurement on the carrier where the TN cell is located.

[0179] Optionally, the terminal receives first information sent by a second network device in the NTN, where the first information includes second information, and the second information indicates the coverage of the TN network.

[0180] In some implementations, the first information may directly indicate the TN network coverage.

[0181] Optionally, the terminal receives first information sent by the second network device in the NTN, where the first information may further include a third threshold value. The terminal may determine whether to reselect to the TN cell according to the third threshold value.

[0182] When the terminal reselects to a TN cell, the TN cell becomes a new serving cell of the terminal, and the terminal camps on the TN cell.

[0183] Step S28 : The terminal 101 determines that the terminal 101 is within the coverage of the TN network indicated by the second information in the first information. The terminal 101 performs a cell reselection measurement on the carrier where the TN cell of the second network type is located to obtain a second signal strength.

[0184] In some embodiments, when the terminal is within the coverage of the TN network indicated by the second information in the first information, the terminal may preferentially camp on the TN cell. For example, when the terminal is within the coverage of the TN network indicated by the second information in the first information, the terminal performs a cell reselection measurement on the carrier where the TN cell of the second network type is located to obtain the second signal strength.

[0185] This shows that the specification stipulates that when the serving cell of the terminal is a non-terrestrial network NTN and the terminal is determined to be within the coverage of the TN network, a cell reselection measurement can be performed on the carrier where the TN cell is located to obtain a second signal strength.

[0186] In some embodiments, there are multiple cells of the second network type. For example, there are multiple TN cells. An implementation of performing cell reselection measurements on carriers where TN cells are located may include performing cell reselection measurements on carriers where each TN cell is located based on the cell priority information carried in the second SIB message.

[0187] For example, based on the cell priority information carried in the second SIB message, cell reselection measurement is performed on the carrier where each TN cell is located in sequence from high to low priority.

[0188] In some implementations, the second SIB message may be sent by a second network device in the NTN.

[0189] In some implementations, the second SIB message may be sent by the first network device in the TN, and the terminal may store the second SIB message.

[0190] It should be explained that there are multiple TN cells, and the priority relationship between the multiple TN cells can be determined based on factors such as signal service quality, and the priority relationship can be carried in the SIB message and sent to the terminal.

[0191] This shows that when the serving cell of the terminal is a non-terrestrial network (NTN), the specification stipulates that cell reselection measurements can be performed on the carriers where each TN cell is located in an orderly manner based on the cell priority information, so as to quickly find the optimal TN cell for camping.

[0192] In some embodiments, whether to reselect to a cell of the second network type is determined based at least on a third threshold and the second signal strength. For example, whether to reselect to a TN cell is determined based at least on a magnitude relationship between the third threshold and the second signal strength. This specification specifies that, when a terminal's serving cell is a non-terrestrial network (NTN), whether to reselect to a TN cell can be determined based at least on a magnitude relationship between the third threshold and the second signal strength.

[0193] In some embodiments, the second signal strength comprises a second SS-RSRP.

[0194] In some embodiments, the second signal strength comprises a second SS-RSRQ.

[0195] In some embodiments, the second signal strength includes a second SS-RSRP and a second SS-RSRQ.

[0196] After the terminal performs cell reselection measurement on the carrier where the TN cell of the second network type is located and obtains the second signal strength, the terminal may execute any one of step S291, step S292, and step S293 in step S29.

[0197] Step S291: Terminal 101 determines that the second signal strength is greater than the third threshold value in the first information, and reselects to the TN cell.

[0198] For example, if the second signal strength is greater than the third threshold, the signal service quality of the TN cell of the second network type is good. Therefore, if the terminal determines that the second signal strength is greater than the third threshold, it can reselect to the TN cell. When reselecting to the TN cell, the TN cell of the second network type becomes the new serving cell of the terminal, and the terminal camps on the TN cell.

[0199] This shows that, when the serving cell of the terminal is a non-terrestrial network NTN, the terminal can reselect to a TN cell by determining that the second signal strength is greater than the third threshold, thereby obtaining better network service.

[0200] Step S292: Terminal 101 determines that the second signal strength is greater than the first signal strength of the serving cell and the second signal strength is greater than the third threshold in the first information, and reselects to the TN cell.

[0201] For example, if the second signal strength is greater than the first signal strength of the serving cell and the second signal strength is greater than a third threshold, the signal service quality of the TN cell of the second network type is not only better, but also better than the signal service quality of the serving cell of the first network type. Therefore, if the terminal determines that the second signal strength is greater than the first signal strength of the serving cell and the second signal strength is greater than the third threshold, the terminal may reselect to the TN cell. If the TN cell is reselected, the TN cell becomes the new serving cell of the terminal, and the terminal camps on the TN cell.

[0202] This shows that when the serving cell of the terminal is a non-terrestrial network NTN, the terminal can reselect to the TN cell by determining that the second signal strength is greater than the first signal strength of the serving cell and the second signal strength is greater than the third threshold value, thereby obtaining better network service.

[0203] Step S293: Terminal 101 determines that the second signal strength is greater than the first signal strength of the serving cell and reselects to the TN cell.

[0204] For example, if the second signal strength is greater than the first signal strength of the serving cell, this may indicate that the signal service quality of the TN cell of the second network type is superior to the signal service quality of the serving cell of the first network type. Therefore, if the terminal determines that the second signal strength is greater than the first signal strength of the serving cell, it may reselect to the TN cell. Upon reselection to the TN cell, the TN cell of the second network type becomes the terminal's new serving cell, and the terminal camps on the TN cell.

[0205] This shows that when the serving cell of the terminal is a non-terrestrial network NTN, the terminal can reselect to the TN cell by determining that the second signal strength is greater than the first signal strength of the serving cell, thereby obtaining better network service.

[0206] The communication method involved in the embodiment of the present disclosure may include at least one of steps S25 to S29 (step S29 includes steps S291, S292, and S293). For example, in the embodiment of the present disclosure, step S28 can be implemented as an independent embodiment, and steps S26, S27, S28, and S291 can be implemented as independent embodiments, but are not limited thereto.

[0207] In the embodiment of the present disclosure, all or part of steps S25 to S29 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0208] In some embodiments, the order of some steps can be swapped, for example, the order of step S25 and step S26 can be swapped, but the present invention is not limited thereto.

[0209] Using the above communication method, based on the first network type of the terminal's serving cell, first information corresponding to the terminal's reselection from a cell of the first network type to a cell of the second network type can be determined. Based on the first information, it can be determined whether to perform cell reselection measurements on the carrier containing the cell of the second network type. This standardizes the determination of whether to perform cross-network cell reselection measurements based on the first information, avoiding the high power consumption caused by real-time measurements. Furthermore, this standardization enables the terminal to camp on or handover back and forth between cells of the first network type and cells of the second network type, thereby enabling the terminal to obtain better signal service quality.

[0210] FIG3a is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG3a, the embodiment of the present disclosure relates to a communication method, which is executed by terminal 101 and includes:

[0211] Step S3101: Determine that the first network type of the serving cell of the terminal is a terrestrial network TN.

[0212] The optional implementation of step S3101 can refer to the optional implementation of step S21 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0213] In some embodiments, the name of the first network type is not limited, and it is, for example, a network system type.

[0214] Step S3102, determine the first information.

[0215] The optional implementation of step S3102 can refer to the optional implementation of steps S22 to S243 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0216] In some embodiments, the first information is information used by the terminal to reselect from a TN cell to an NTN cell. The name of the first information is not limited, and it can be, for example, cell reselection configuration, cell reselection measurement configuration, cell reselection configuration parameters, etc.

[0217] In some embodiments, the terminal 101 receives the first information sent by the first network device 102, but is not limited thereto and may also receive the first information sent by other entities.

[0218] In some embodiments, terminal 101 obtains first information specified by a protocol.

[0219] In some embodiments, terminal 101 obtains the first information from upper layer(s).

[0220] In some embodiments, the terminal 101 performs processing to obtain the first information.

[0221] After step S3102, execute any one of step S31031, step S31032, and step S31033.

[0222] Step S31031: Determine that the first signal strength of the serving cell is greater than the first threshold in the first information, and do not perform cell reselection measurement on the carrier where the NTN cell is located.

[0223] The optional implementation of step S31031 can refer to the optional implementation of step S241 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0224] In some embodiments, the first signal strength represents a measurement result obtained by measuring the carrier where the serving cell is located. The name of the first signal strength is not limited, and it can be, for example, the serving cell signal strength, the SS-RSRP and / or SS-RSRQ of the serving cell, etc.

[0225] In some embodiments, the name of the carrier is not limited, and it is, for example, a component carrier.

[0226] Step S31032: determine that the first signal strength of the serving cell is less than the first threshold in the first information and the first signal strength is greater than the second threshold in the first information, and perform relaxed cell reselection measurement on the carrier where the NTN cell is located according to the proportional factor.

[0227] In some embodiments, the first threshold value and the second threshold value are both numerical values ​​used to judge the quality of signal service in the serving cell. The names of the first threshold value and the second threshold value are not limited. The first threshold value can be called the serving cell threshold value, the serving cell threshold parameter, etc., and the second threshold value can be called the serving cell threshold value, the serving cell threshold parameter, etc.

[0228] The optional implementation of step S31032 can refer to the optional implementation of step S242 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0229] Step S31033: Determine that the first signal strength of the serving cell is less than the second threshold value in the first information, and perform cell reselection measurement on the carrier where the NTN cell is located.

[0230] The optional implementation of step S31033 can refer to the optional implementation of step S243 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0231] The communication method involved in the embodiments of the present disclosure may include at least one of steps S3101 to S31033. For example, step S31031 may be implemented as an independent embodiment, step S31032 may be implemented as an independent embodiment, step S31033 may be implemented as an independent embodiment, and steps S3102 and S31031 may be implemented as independent embodiments, but are not limited thereto.

[0232] In different embodiments, all or part of steps S3101 to S31033 may be omitted or replaced.

[0233] FIG3b is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG3b, the embodiment of the present disclosure relates to a communication method, which is executed by terminal 101 and includes:

[0234] Step S3201: Determine that the first network type of the serving cell of the terminal is a non-terrestrial network (NTN).

[0235] The optional implementation of step S3201 can refer to the optional implementation of step S25 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0236] In some embodiments, the name of the first network type is not limited, and it is, for example, a network system type.

[0237] Step S3202, determine the first information.

[0238] The optional implementation of step S3202 can refer to the optional implementation of steps S26 to S293 in Figure 2, and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0239] In some embodiments, the first information is information used by the terminal to reselect from an NTN cell to a TN cell. The name of the first information is not limited, and it can be, for example, cell reselection configuration, cell reselection measurement configuration, cell reselection configuration parameters, etc.

[0240] In some embodiments, the terminal 101 receives the first information sent by the second network device 103, but is not limited thereto and may also receive the first information sent by other entities.

[0241] In some embodiments, terminal 101 obtains first information specified by a protocol.

[0242] In some embodiments, terminal 101 obtains the first information from upper layer(s).

[0243] In some embodiments, the terminal 101 performs processing to obtain the first information.

[0244] Step S3203: Determine that the terminal is within the coverage of the TN network indicated by the second information in the first information, perform cell reselection measurement on the carrier where the TN cell is located, and obtain a second signal strength.

[0245] The optional implementation of step S3203 can refer to the optional implementation of step S28 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0246] In some embodiments, the second signal strength represents a measurement result obtained by measuring the carrier where the TN cell is located. The name of the second signal strength is not limited, and it can be, for example, the TN cell signal strength, the SS-RSRP and / or SS-RSRQ of the TN cell, etc.

[0247] In some embodiments, the name of the carrier is not limited, and it is, for example, a component carrier.

[0248] After step S3203, execute any one of step S32041, step S32042, and step S32043.

[0249] Step S32041: Determine that the second signal strength is greater than the third threshold in the first information, and reselect to the TN cell.

[0250] The optional implementation of step S32041 can refer to the optional implementation of step S291 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0251] In some embodiments, the third threshold value is a value used to judge the signal service quality of the TN cell. The name of the third threshold value is not limited. The third threshold value can be called a TN cell threshold value, a TN cell threshold parameter, etc.

[0252] Step S32042: Determine that the second signal strength is greater than the first signal strength of the serving cell and that the second signal strength is greater than the third threshold in the first information, and reselect to the TN cell.

[0253] The optional implementation of step S32042 can refer to the optional implementation of step S292 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0254] Step S32043: Determine that the second signal strength is greater than the first signal strength of the serving cell, and reselect to the TN cell.

[0255] The optional implementation of step S32043 can refer to the optional implementation of step S293 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0256] The communication method involved in the embodiments of the present disclosure may include at least one of steps S3201 to S32043. For example, step S3203 may be implemented as an independent embodiment, step S3203 and step S32041 may be implemented as independent embodiments, step S3203 and step S32042 may be implemented as independent embodiments, and step S3203 and step S32043 may be implemented as independent embodiments, but the present invention is not limited thereto.

[0257] In different embodiments, all or part of steps S3201 to S32043 may be omitted or replaced.

[0258] FIG3c is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG3c, the embodiment of the present disclosure relates to a communication method, which is executed by terminal 101 and includes:

[0259] Step S3301: Determine a first network type of a serving cell of the terminal.

[0260] The serving cell refers to the cell to which the terminal is currently connected, that is, the cell to which the terminal is currently receiving and sending data. In some embodiments, the serving cell may also be referred to as a local cell or a current cell.

[0261] In the embodiment of the present disclosure, step S3301 is an optional step rather than a step that must be performed, and step S3301 can be omitted or replaced.

[0262] In some embodiments, the first network type may be a terrestrial network TN.

[0263] In some other embodiments, the first network type may be a non-terrestrial network NTN.

[0264] Step S3302: Determine first information for the terminal to reselect from a cell of the first network type to a cell of the second network type.

[0265] In some embodiments, when the first network type is a terrestrial network (TN), the corresponding second network type is a non-terrestrial network (NTN). Optionally, the first information is used by the terminal to reselect from a TN cell to an NTN cell. Optionally, the first information is carried in a SIB message, such as a SIB 2 message, sent by the first network device in the TN. Thus, by having the first network device in the TN carry the first information in a SIB message and send it to the terminal, it is possible to flexibly configure, update, or expand the first information based on demand, avoiding the problems of fixed first information in the terminal that result in inflexible configuration, updating, and expansion.

[0266] In some embodiments, when the first network type is a non-terrestrial network (NTN), the second network type is correspondingly a terrestrial network (TN). Optionally, the first information is used by the terminal to reselect from the NTN cell to the TN cell. Optionally, the first information is carried in a SIB message, such as a SIB 19 message, sent by a second network device in the NTN. Thus, by having the second network device in the NTN carry the first information in a SIB message and send it to the terminal, it facilitates flexible configuration, updating, or expansion of the first information based on demand, avoiding the issues of fixed configuration, updating, and expansion issues that arise when the first information is fixed in the terminal.

[0267] Step S3303: Determine whether to perform cell reselection measurement on the carrier where the cell of the second network type is located according to the first information.

[0268] Optionally, if the first information is sent by the first network device in the TN to the terminal, the first information includes at least one of a first threshold value and a second threshold value, wherein the first threshold value is greater than the second threshold value.

[0269] Illustratively, the first information includes a first threshold value.

[0270] Illustratively, the first information includes the second threshold value.

[0271] Illustratively, the first information includes a first threshold value and a second threshold value.

[0272] The sizes of the first threshold value and the second threshold value can be flexibly set according to scenario requirements, and the present disclosure does not limit the first threshold value and the second threshold value.

[0273] In some embodiments, a terminal receives first information sent by a first TN network device, and the terminal may store the first information. This first information is configuration information for the terminal to reselect from a serving cell of a first network type, TN, to a cell of a second network type, NTN. Based on this first information, it can be determined whether the terminal reselects from a serving cell of the first network type, TN, to a cell of the second network type, NTN. Thus, if the serving cell of the terminal is a terrestrial network, TN, the first information can be used to determine whether to perform cross-network cell reselection measurements from the terrestrial network, TN, to a non-terrestrial network, NTN.

[0274] In some embodiments, the terminal may use the first information when reselecting from a cell of the first network type to a cell of the second network type. For example, the terminal may use the first information when reselecting from a TN cell to an NTN cell. Specifically, the first information may be used to determine whether to perform cell reselection measurements on the carrier where the NTN cell is located. This specification specifies that, when the terminal's serving cell is a terrestrial network (TN), the first information may be used to determine whether to perform cell reselection measurements on the carrier where the NTN cell is located.

[0275] It should be explained that after a certain period of time, a terminal accessing the network stops transmitting data on the user plane and enters the RRC Idle or RRC Inactive state. In this state, the terminal monitors the signal quality of the serving cell and neighboring cells to select the best cell to provide signal service. In other words, in a mobile communication network, when a terminal switches to a cell with a stronger signal or adds a new carrier (component carrier) in carrier aggregation, it needs to measure the signal quality of the serving cell and neighboring cells. The process by which a terminal selects a new cell to reside in is called cell reselection.

[0276] In some embodiments, the terminal monitors the signal quality of the serving cell in real time. For example, the terminal monitors the signal quality of the carrier where the serving cell is located to obtain a first signal strength of the serving cell.

[0277] In some embodiments, the first signal strength includes a first synchronization signal reference signal received power SS-RSRP (Synchronization Signal Reference Signal Received Power).

[0278] In some embodiments, the first signal strength includes a first synchronization signal reference signal received quality SS-RSRQ (Synchronization Signal Reference Signal Received Quality).

[0279] In some embodiments, the first signal strength includes SS-RSRP and SS-RSRQ.

[0280] In some embodiments, the first information may be modified. After the first information is modified, the first network device may send a notification to the terminal indicating that the first information has been modified. Furthermore, the first network device may send the modified first information to the terminal, and the terminal may receive the modified first information.

[0281] In other embodiments, the first network device may broadcast or multicast the modified first information, and the terminal obtains the modified first information from a corresponding broadcast channel.

[0282] In a case where the terminal has the first information, the terminal may determine, according to the first information, whether to perform cell reselection measurement on the carrier where the cell of the second network type is located.

[0283] In some embodiments, the first information includes a first threshold. If the first signal strength of the serving cell of the terminal is greater than the first threshold in the first information, it indicates that the signal service quality of the serving cell is very good. Therefore, if the terminal determines that the first signal strength of the serving cell is greater than the first threshold in the first information, the terminal can continue to camp on the serving cell without performing cell reselection measurement on the carrier where the NTN cell of the second network type is located.

[0284] This shows that the specification stipulates that when the serving cell of the terminal is the terrestrial network TN and the first signal strength of the serving cell of the terminal is greater than the first threshold, cell reselection measurement is not performed on the carrier where the NTN cell is located.

[0285] In some embodiments, the first information includes a first threshold value and a second threshold value, wherein the first threshold value is greater than the second threshold value. When the first signal strength of the terminal's serving cell is less than the first threshold value and the first signal strength is greater than the second threshold value, it indicates that the signal service quality of the serving cell is relatively good. Therefore, when the terminal determines that the first signal strength of the serving cell is less than the first threshold value and the first signal strength is greater than the second threshold value, the terminal can choose to continue to reside in the serving cell or select another cell to reside in. In this case, a relaxed cell reselection measurement can be performed on the carrier where the NTN cell of the second network type is located. For example, a relaxed cell reselection measurement can be performed on the carrier where the NTN cell of the second network type is located based on a scaling factor.

[0286] It can be seen that this specifies that when the service cell of the terminal is a terrestrial network TN, and the first signal strength of the service cell of the terminal is less than the first threshold value, and the first signal strength is greater than the second threshold value, the relaxed cell reselection measurement is performed on the carrier where the NTN cell is located.

[0287] In some embodiments, the scaling factor may be configured according to a received first system information block (SIB) message. The first SIB message may be sent by the first network device.

[0288] In some embodiments, the scaling factor may be determined according to a protocol agreement.

[0289] In some embodiments, the scaling factor may be pre-configured in the terminal, where pre-configuration may be understood as pre-definition, pre-storage, pre-negotiation, curing, or pre-burning.

[0290] It can be seen that the scale factor can be obtained in different ways to meet the needs of different scenarios.

[0291] It should be noted that the time during which a mobile device suspends communication with its serving cell to measure inter-frequency or inter-system neighboring cells is called a measurement gap (Meas Gap) or reference measurement gap. For example, performing relaxed cell reselection measurements on a carrier based on a scaling factor can involve determining a relaxed measurement gap y2 based on the scaling factor n and the measurement gap y1, such that y2 = n × y1, and performing cell reselection measurements on the carrier based on the relaxed measurement gap y2. This cell reselection measurement method is a relaxed cell reselection measurement method.

[0292] In some embodiments, the first information includes a second threshold. If the first signal strength of the terminal's serving cell is less than the second threshold in the first information, it indicates that the signal service quality of the serving cell is poor. Therefore, if the terminal determines that the first signal strength of the serving cell is less than the second threshold in the first information, it may perform cell reselection measurement on the carrier where the NTN cell of the second network type is located.

[0293] This shows that when the terminal's serving cell is a terrestrial network TN and the first signal strength of the terminal's serving cell is less than the second threshold, cell reselection measurement is performed on the carrier where the NTN cell is located to reselect a cell with better signal service quality.

[0294] Optionally, the terminal receives first information sent by a second network device of the NTN network, and the terminal may store the first information. This first information is configuration information for the terminal to reselect from a serving cell of the first network type (NTN) to a cell of the second network type (TN). Based on this first information, it can be determined whether the terminal reselects from the serving cell of the first network type (NTN) to the cell of the second network type (TN). Thus, if the serving cell of the terminal is a non-terrestrial network (NTN), the first information can be used to determine whether to perform cross-network cell reselection measurements from the non-terrestrial network (NTN) to the terrestrial network (TN).

[0295] In some embodiments, the terminal may use the first information when reselecting from a cell of the first network type to a cell of the second network type. For example, the terminal may use the first information when reselecting from an NTN cell to a TN cell. Specifically, the terminal may determine whether to perform cell reselection measurements on the carrier where the TN cell is located based on the first information.

[0296] This shows that it is specified that when the serving cell of the terminal is a non-terrestrial network NTN, whether to perform cell reselection measurement on the carrier where the TN cell is located can be determined according to the first information.

[0297] Optionally, if the second network device in the NTN sends the first information to the terminal, the first information includes the second information, and the second information indicates the coverage of the TN network. In other implementations, the first information may directly indicate the coverage of the TN network.

[0298] Optionally, the first information may further include a third threshold value, and the terminal may determine whether to reselect to a TN cell according to the third threshold value.

[0299] It should be noted that, when the terminal reselects to a TN cell, the TN cell is a new serving cell of the terminal, and the terminal resides in the TN cell.

[0300] In some embodiments, the first information includes second information, where the second information indicates TN network coverage. When the terminal is within the TN network coverage indicated by the second information in the first information, the terminal may preferentially camp on the TN cell. For example, when the terminal is within the TN network coverage indicated by the second information in the first information, the terminal performs a cell reselection measurement on the carrier where the TN cell of the second network type is located to obtain a second signal strength.

[0301] This shows that the specification stipulates that when the serving cell of the terminal is a non-terrestrial network NTN and the terminal is determined to be within the coverage of the TN network, a cell reselection measurement can be performed on the carrier where the TN cell is located to obtain a second signal strength.

[0302] In some embodiments, there are multiple cells of the second network type. For example, there are multiple TN cells. An implementation of performing cell reselection measurements on carriers where TN cells are located may include performing cell reselection measurements on carriers where each TN cell is located based on the cell priority information carried in the second SIB message.

[0303] For example, based on the cell priority information carried in the second SIB message, cell reselection measurement is performed on the carrier where each TN cell is located in sequence from high to low priority.

[0304] In some implementations, the second SIB message may be sent by a second network device in the NTN.

[0305] In some implementations, the second SIB message may be sent by the first network device in the TN, and the terminal may store the second SIB message.

[0306] It should be explained that there are multiple TN cells, and the priority relationship between the multiple TN cells can be determined based on factors such as signal service quality, and the priority relationship can be carried in the SIB message and sent to the terminal.

[0307] This shows that when the serving cell of the terminal is a non-terrestrial network (NTN), the specification stipulates that cell reselection measurements can be performed on the carriers where each TN cell is located in an orderly manner based on the cell priority information, so as to quickly find the optimal TN cell for camping.

[0308] In some embodiments, the first information may further include a third threshold value. The terminal may determine whether to reselect to a cell of the second network type based at least on the third threshold value and the second signal strength. For example, the determination of whether to reselect to a TN cell may be based at least on the relationship between the third threshold value and the second signal strength. This specification specifies that, when the terminal's serving cell is a non-terrestrial network (NTN), the determination of whether to reselect to a TN cell may be based at least on the relationship between the third threshold value and the second signal strength.

[0309] In some embodiments, the second signal strength comprises a second SS-RSRP.

[0310] In some embodiments, the second signal strength comprises a second SS-RSRQ.

[0311] In some embodiments, the second signal strength includes a second SS-RSRP and a second SS-RSRQ.

[0312] In some embodiments, when the second signal strength is greater than a third threshold, the signal service quality of the TN cell of the second network type is better. Therefore, if the terminal determines that the second signal strength is greater than the third threshold, the terminal may reselect to the TN cell. If the terminal reselects to the TN cell, the TN cell of the second network type becomes the terminal's new serving cell, and the terminal camps on the TN cell.

[0313] This shows that, when the serving cell of the terminal is a non-terrestrial network NTN, the terminal can reselect to a TN cell by determining that the second signal strength is greater than the third threshold, thereby obtaining better network service.

[0314] In some embodiments, when the second signal strength is greater than the first signal strength of the serving cell and the second signal strength is greater than a third threshold, the signal service quality of the TN cell of the second network type is not only better, but also better than the signal service quality of the serving cell of the first network type. Therefore, if the terminal determines that the second signal strength is greater than the first signal strength of the serving cell and the second signal strength is greater than the third threshold, the terminal may reselect to the TN cell. When the terminal reselects to the TN cell, the TN cell becomes the terminal's new serving cell, and the terminal camps on the TN cell.

[0315] This shows that when the serving cell of the terminal is a non-terrestrial network NTN, the terminal can reselect to the TN cell by determining that the second signal strength is greater than the first signal strength of the serving cell and the second signal strength is greater than the third threshold value, thereby obtaining better network service.

[0316] In some embodiments, if the second signal strength is greater than the first signal strength of the serving cell, this may indicate that the signal service quality of the TN cell of the second network type is superior to the signal service quality of the serving cell of the first network type. Therefore, if the terminal determines that the second signal strength is greater than the first signal strength of the serving cell, the terminal may reselect to the TN cell. If the terminal reselects to the TN cell, the TN cell of the second network type becomes the terminal's new serving cell, and the terminal camps on the TN cell.

[0317] This shows that when the serving cell of the terminal is a non-terrestrial network NTN, the terminal can reselect to the TN cell by determining that the second signal strength is greater than the first signal strength of the serving cell, thereby obtaining better network service.

[0318] Using the method disclosed above, based on the first network type of the terminal's serving cell, first information corresponding to the terminal's reselection from a cell of the first network type to a cell of the second network type can be determined. Based on the first information, it can be determined whether to perform cell reselection measurements on the carrier containing the cell of the second network type. This standardizes the determination of whether to perform cross-network cell reselection measurements based on the first information, avoiding the high power consumption caused by real-time measurements. Furthermore, this standardization enables the terminal to reside or handover back and forth between cells of the first network type and cells of the second network type, thereby enabling the terminal to obtain better quality signal service.

[0319] The communication method involved in the embodiment of the present disclosure may include at least one of steps S3301 to S3303. For example, step S3303 may be implemented as an independent embodiment, but is not limited thereto.

[0320] In different embodiments, all or part of steps S3301 to S3303 may be omitted or replaced.

[0321] FIG3 d is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG3 d , the embodiment of the present disclosure relates to a communication method, which is executed by terminal 101 and includes:

[0322] Step S3401: Determine first information for a terminal to reselect from a serving cell of a first network type to a cell of a second network type.

[0323] The serving cell refers to the cell to which the terminal is currently connected, that is, the cell to which the terminal is currently receiving and sending data. In some embodiments, the serving cell may also be referred to as a local cell or a current cell.

[0324] In some embodiments, when the first network type is a terrestrial network (TN), the corresponding second network type is a non-terrestrial network (NTN). The first information is used by the terminal to reselect from the TN cell to the NTN cell. Optionally, the first information is carried in a SIB message, such as a SIB 2 message, sent by the first network device in the TN. Thus, by having the first network device in the TN carry the first information in a SIB message and send it to the terminal, it facilitates flexible configuration, updating, or expansion of the first information based on demand, avoiding the issues of fixed configuration, updating, and expansion issues that arise when the first information is fixed in the terminal.

[0325] In some embodiments, when the first network type is a non-terrestrial network (NTN), the corresponding second network type is a terrestrial network (TN). The first information is used by the terminal to reselect from the NTN cell to the TN cell. Optionally, the first information is carried in a SIB message, such as a SIB 19 message, sent by a second network device in the NTN. Thus, by having the second network device in the NTN carry the first information in a SIB message and send it to the terminal, it facilitates flexible configuration, updating, or expansion of the first information based on demand, avoiding the issues of fixed configuration, updating, and expansion issues that arise when the first information is fixed in the terminal.

[0326] Step S3402: Determine whether to perform cell reselection measurement on the carrier where the cell of the second network type is located according to the first information.

[0327] Optionally, if the first information is sent by the first network device in the TN to the terminal, the first information includes at least one of a first threshold value and a second threshold value, wherein the first threshold value is greater than the second threshold value.

[0328] Illustratively, the first information includes a first threshold value.

[0329] Illustratively, the first information includes the second threshold value.

[0330] Illustratively, the first information includes a first threshold value and a second threshold value.

[0331] The sizes of the first threshold value and the second threshold value can be flexibly set according to scenario requirements, and the present disclosure does not limit the first threshold value and the second threshold value.

[0332] In some embodiments, a terminal receives first information sent by a first TN network device, and the terminal may store the first information. This first information is configuration information for the terminal to reselect from a serving cell of a first network type, TN, to a cell of a second network type, NTN. Based on this first information, it can be determined whether the terminal reselects from a serving cell of the first network type, TN, to a cell of the second network type, NTN. Thus, if the serving cell of the terminal is a terrestrial network, TN, the first information can be used to determine whether to perform cross-network cell reselection measurements from the terrestrial network, TN, to a non-terrestrial network, NTN.

[0333] In some embodiments, the terminal may use the first information when reselecting from a cell of the first network type to a cell of the second network type. For example, the terminal may use the first information when reselecting from a TN cell to an NTN cell. Specifically, the first information may be used to determine whether to perform cell reselection measurements on the carrier where the NTN cell is located. This specification specifies that, when the terminal's serving cell is a terrestrial network (TN), the first information may be used to determine whether to perform cell reselection measurements on the carrier where the NTN cell is located.

[0334] It should be explained that after a certain period of time, a terminal accessing the network stops transmitting data on the user plane and enters the RRC Idle or RRC Inactive state. In this state, the terminal monitors the signal quality of the serving cell and neighboring cells to select the best cell to provide signal service. In other words, in a mobile communication network, when a terminal switches to a cell with a stronger signal or adds a new carrier (component carrier) in carrier aggregation, it needs to measure the signal quality of the serving cell and neighboring cells. The process by which a terminal selects a new cell to reside in is called cell reselection.

[0335] In some embodiments, the terminal monitors the signal quality of the serving cell in real time. For example, the terminal monitors the signal quality of the carrier where the serving cell is located to obtain a first signal strength of the serving cell.

[0336] In some embodiments, the first signal strength includes a first synchronization signal reference signal received power SS-RSRP (Synchronization Signal Reference Signal Received Power).

[0337] In some embodiments, the first signal strength includes a first synchronization signal reference signal received quality SS-RSRQ (Synchronization Signal Reference Signal Received Quality).

[0338] In some embodiments, the first signal strength includes SS-RSRP and SS-RSRQ.

[0339] In some embodiments, the first information may be modified. After the first information is modified, the first network device may send a notification to the terminal indicating that the first information has been modified. Furthermore, the first network device may send the modified first information to the terminal, and the terminal may receive the modified first information.

[0340] In other embodiments, the first network device may broadcast or multicast the modified first information, and the terminal obtains the modified first information from a corresponding broadcast channel.

[0341] In a case where the terminal has the first information, the terminal may determine, according to the first information, whether to perform cell reselection measurement on the carrier where the cell of the second network type is located.

[0342] In some embodiments, the first information includes a first threshold. If the first signal strength of the serving cell of the terminal is greater than the first threshold in the first information, it indicates that the signal service quality of the serving cell is very good. Therefore, if the terminal determines that the first signal strength of the serving cell is greater than the first threshold in the first information, the terminal can continue to camp on the serving cell without performing cell reselection measurement on the carrier where the NTN cell of the second network type is located.

[0343] This shows that the specification stipulates that when the serving cell of the terminal is the terrestrial network TN and the first signal strength of the serving cell of the terminal is greater than the first threshold, cell reselection measurement is not performed on the carrier where the NTN cell is located.

[0344] In some embodiments, the first information includes a first threshold value and a second threshold value, wherein the first threshold value is greater than the second threshold value. When the first signal strength of the terminal's serving cell is less than the first threshold value and the first signal strength is greater than the second threshold value, it indicates that the signal service quality of the serving cell is relatively good. Therefore, when the terminal determines that the first signal strength of the serving cell is less than the first threshold value and the first signal strength is greater than the second threshold value, the terminal can choose to continue to reside in the serving cell or select another cell to reside in. In this case, a relaxed cell reselection measurement can be performed on the carrier where the NTN cell of the second network type is located. For example, a relaxed cell reselection measurement can be performed on the carrier where the NTN cell of the second network type is located based on a scaling factor.

[0345] It can be seen that this specifies that when the service cell of the terminal is a terrestrial network TN, and the first signal strength of the service cell of the terminal is less than the first threshold value, and the first signal strength is greater than the second threshold value, the relaxed cell reselection measurement is performed on the carrier where the NTN cell is located.

[0346] In some embodiments, the scaling factor may be configured according to a received first system information block (SIB) message. The first SIB message may be sent by the first network device.

[0347] In some embodiments, the scaling factor may be determined according to a protocol agreement.

[0348] In some embodiments, the scaling factor may be pre-configured in the terminal, where pre-configuration may be understood as pre-definition, pre-storage, pre-negotiation, curing, or pre-burning.

[0349] It can be seen that the scale factor can be obtained in different ways to meet the needs of different scenarios.

[0350] It should be noted that the time during which a mobile device suspends communication with its serving cell to measure inter-frequency or inter-system neighboring cells is called a measurement gap (Meas Gap) or reference measurement gap. For example, performing relaxed cell reselection measurements on a carrier based on a scaling factor can involve determining a relaxed measurement gap y2 based on the scaling factor n and the measurement gap y1, such that y2 = n × y1, and performing cell reselection measurements on the carrier based on the relaxed measurement gap y2. This cell reselection measurement method is a relaxed cell reselection measurement method.

[0351] In some embodiments, the first information includes a second threshold. If the first signal strength of the terminal's serving cell is less than the second threshold in the first information, it indicates that the signal service quality of the serving cell is poor. Therefore, if the terminal determines that the first signal strength of the serving cell is less than the second threshold in the first information, it may perform cell reselection measurement on the carrier where the NTN cell of the second network type is located.

[0352] This shows that when the terminal's serving cell is a terrestrial network TN and the first signal strength of the terminal's serving cell is less than the second threshold, cell reselection measurement is performed on the carrier where the NTN cell is located to reselect a cell with better signal service quality.

[0353] Optionally, the terminal receives first information sent by a second network device of the NTN network, and the terminal may store the first information. This first information is configuration information for the terminal to reselect from a serving cell of the first network type (NTN) to a cell of the second network type (TN). Based on this first information, it can be determined whether the terminal reselects from the serving cell of the first network type (NTN) to the cell of the second network type (TN). Thus, if the serving cell of the terminal is a non-terrestrial network (NTN), the first information can be used to determine whether to perform cross-network cell reselection measurements from the non-terrestrial network (NTN) to the terrestrial network (TN).

[0354] In some embodiments, the terminal may use the first information when reselecting from a cell of the first network type to a cell of the second network type. For example, the terminal may use the first information when reselecting from an NTN cell to a TN cell. Specifically, the terminal may determine whether to perform cell reselection measurements on the carrier where the TN cell is located based on the first information.

[0355] This shows that it is specified that when the serving cell of the terminal is a non-terrestrial network NTN, whether to perform cell reselection measurement on the carrier where the TN cell is located can be determined according to the first information.

[0356] Optionally, if the second network device in the NTN sends the first information to the terminal, the first information includes the second information, and the second information indicates the coverage of the TN network.

[0357] In some implementations, the first information may directly indicate the TN network coverage.

[0358] Optionally, the first information may further include a third threshold value, and the terminal may determine whether to reselect to a TN cell according to the third threshold value.

[0359] When the terminal reselects to a TN cell, the TN cell becomes a new serving cell of the terminal, and the terminal camps on the TN cell.

[0360] In some embodiments, the first information includes second information, where the second information indicates TN network coverage. When the terminal is within the TN network coverage indicated by the second information in the first information, the terminal may preferentially camp on the TN cell. For example, when the terminal is within the TN network coverage indicated by the second information in the first information, the terminal performs a cell reselection measurement on the carrier where the TN cell of the second network type is located to obtain a second signal strength.

[0361] This shows that the specification stipulates that when the serving cell of the terminal is a non-terrestrial network NTN and the terminal is determined to be within the coverage of the TN network, a cell reselection measurement can be performed on the carrier where the TN cell is located to obtain a second signal strength.

[0362] In some embodiments, there are multiple cells of the second network type. For example, there are multiple TN cells. An implementation of performing cell reselection measurements on carriers where TN cells are located may include performing cell reselection measurements on carriers where each TN cell is located based on the cell priority information carried in the second SIB message.

[0363] For example, based on the cell priority information carried in the second SIB message, cell reselection measurement is performed on the carrier where each TN cell is located in sequence from high to low priority.

[0364] In some implementations, the second SIB message may be sent by a second network device in the NTN.

[0365] In some implementations, the second SIB message may be sent by the first network device in the TN, and the terminal may store the second SIB message.

[0366] It should be explained that there are multiple TN cells, and the priority relationship between the multiple TN cells can be determined based on factors such as signal service quality, and the priority relationship can be carried in the SIB message and sent to the terminal.

[0367] This shows that when the serving cell of the terminal is a non-terrestrial network (NTN), the specification stipulates that cell reselection measurements can be performed on the carriers where each TN cell is located in an orderly manner based on the cell priority information, so as to quickly find the optimal TN cell for camping.

[0368] In some embodiments, the first information may further include a third threshold value. The terminal may determine whether to reselect to a cell of the second network type based at least on the third threshold value and the second signal strength. For example, the determination of whether to reselect to a TN cell may be based at least on the relationship between the third threshold value and the second signal strength. This specification specifies that, when the terminal's serving cell is a non-terrestrial network (NTN), the determination of whether to reselect to a TN cell may be based at least on the relationship between the third threshold value and the second signal strength.

[0369] In some embodiments, the second signal strength comprises a second SS-RSRP.

[0370] In some embodiments, the second signal strength comprises a second SS-RSRQ.

[0371] In some embodiments, the second signal strength includes a second SS-RSRP and a second SS-RSRQ.

[0372] In some embodiments, when the second signal strength is greater than a third threshold, the signal service quality of the TN cell of the second network type is better. Therefore, if the terminal determines that the second signal strength is greater than the third threshold, the terminal may reselect to the TN cell. If the terminal reselects to the TN cell, the TN cell of the second network type becomes the terminal's new serving cell, and the terminal camps on the TN cell.

[0373] This shows that, when the serving cell of the terminal is a non-terrestrial network NTN, the terminal can reselect to a TN cell by determining that the second signal strength is greater than the third threshold, thereby obtaining better network service.

[0374] In some embodiments, when the second signal strength is greater than the first signal strength of the serving cell and the second signal strength is greater than a third threshold, the signal service quality of the TN cell of the second network type is not only better, but also better than the signal service quality of the serving cell of the first network type. Therefore, if the terminal determines that the second signal strength is greater than the first signal strength of the serving cell and the second signal strength is greater than the third threshold, the terminal may reselect to the TN cell. When the terminal reselects to the TN cell, the TN cell becomes the terminal's new serving cell, and the terminal camps on the TN cell.

[0375] This shows that when the serving cell of the terminal is a non-terrestrial network NTN, the terminal can reselect to the TN cell by determining that the second signal strength is greater than the first signal strength of the serving cell and the second signal strength is greater than the third threshold value, thereby obtaining better network service.

[0376] In some embodiments, if the second signal strength is greater than the first signal strength of the serving cell, this may indicate that the signal service quality of the TN cell of the second network type is superior to the signal service quality of the serving cell of the first network type. Therefore, if the terminal determines that the second signal strength is greater than the first signal strength of the serving cell, the terminal may reselect to the TN cell. If the terminal reselects to the TN cell, the TN cell of the second network type becomes the terminal's new serving cell, and the terminal camps on the TN cell.

[0377] This shows that when the serving cell of the terminal is a non-terrestrial network NTN, the terminal can reselect to the TN cell by determining that the second signal strength is greater than the first signal strength of the serving cell, thereby obtaining better network service.

[0378] Using the method disclosed above, based on the first network type of the terminal's serving cell, first information corresponding to the terminal's reselection from a cell of the first network type to a cell of the second network type can be determined. Based on the first information, it can be determined whether to perform cell reselection measurements on the carrier containing the cell of the second network type. This standardizes the determination of whether to perform cross-network cell reselection measurements based on the first information, avoiding the high power consumption caused by real-time measurements. Furthermore, this standardization enables the terminal to reside or handover back and forth between cells of the first network type and cells of the second network type, thereby enabling the terminal to obtain better quality signal service.

[0379] FIG4 is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG4 , the present disclosure embodiment relates to a communication method, which is executed by a network device. The method includes:

[0380] Step S41: Send the first information.

[0381] Optional implementations of step S41 may refer to step S22 and step S26 of FIG. 2 , as well as other related parts of the embodiment involved in FIG. 2 , which will not be described in detail here.

[0382] In some implementations, the network device 102 sends the first information to the terminal 101, but is not limited thereto, and the first information may be sent to other entities.

[0383] In some embodiments, the first information represents configuration information used by the terminal to reselect from a serving cell of the first network type to a cell of the second network type. The name of the first information is not limited, and it can be, for example, cell reselection configuration, cell reselection measurement configuration, cell reselection configuration parameters, etc.

[0384] In some implementations, the network device may be the first network device 102 in a TN.

[0385] Optionally, the first information includes a first threshold value, and the first threshold value instructs the terminal not to perform cell reselection measurement on the carrier where the cell of the second network type is located when the first signal strength of the serving cell is greater than the first threshold value.

[0386] Optionally, the first information includes a first threshold value and a second threshold value, wherein the first threshold value is greater than the second threshold value, and the first information indicates that the terminal performs relaxed cell reselection measurement on the carrier where the cell of the second network type is located when the first signal strength of the serving cell is less than the first threshold value and the first signal strength is greater than the second threshold value.

[0387] Optionally, the first information includes a second threshold value, and the second threshold value instructs the terminal to perform cell reselection measurement on a carrier where a cell of the second network type is located when the first signal strength of the serving cell is less than the second threshold value.

[0388] In some implementations, the network device may be the second network device 103 in the NTN.

[0389] Optionally, the first information indicates a TN network coverage, or the first information includes second information, and the second information indicates a TN network coverage. The second information is used to instruct the terminal to perform a cell reselection measurement on a carrier where a cell of the second network type is located when the terminal is within the TN network coverage to obtain a second signal strength.

[0390] Optionally, the first information further includes a third threshold value, and the first information is used by the terminal to determine whether to reselect a cell of the second network type based at least on the third threshold value and the second signal strength.

[0391] The present disclosure also provides an implementation of a communication method, which configures a threshold value for cell reselection measurement when a UE reselects from a TN network to an NTN network.

[0392] Optionally, the threshold configuration information is configured through a system information block (SIB).

[0393] Optionally, the threshold configuration information includes serving cell threshold configuration information, for example, including a first threshold and a second threshold, where the first threshold is greater than the second threshold.

[0394] Optionally, the UE performs a relaxed cell reselection measurement on the NTN network according to a scaling factor preset by the terminal, configured by the network device, or agreed upon by the protocol, where the scaling factor is obtained by any of the following methods:

[0395] System Information Block (SIB) configuration; protocol agreed value; preset value preset on the terminal.

[0396] For example, the UE obtains reselection configuration information (i.e., threshold configuration information) for handover / reselection from a TN network to an NTN network cell through the serving cell's SIB message (SIB 2). When the UE is camped on a TN network cell, if the serving cell's signal strength (SS-RSRP and / or SS-RSRQ) is above a configured first threshold, the UE may not perform cell reselection measurements on the NTN carrier. If the serving cell's signal strength (SS-RSRP and / or SS-RSRQ) is above a configured second threshold but below the first threshold, the UE performs relaxed cell reselection measurements on the NTN carrier. The scaling factor may be a network-configured value or a protocol-agreed value, and the reference measurement interval is the value defined in Sections 4.2C.2.2 and 4.2C.2.3 of 38.133. If the serving cell's signal strength (SS-RSRP and / or SS-RSRQ) is below the configured second threshold, the UE begins performing cell reselection measurements on the NTN carrier according to the reference measurement interval.

[0397] In some embodiments, a threshold value for cell reselection measurement when a UE reselects from an NTN network to a TN network is configured.

[0398] Optionally, the configuration information is configured through a system message, for example, the configuration information is carried in a SIB 19 message of a network device of the NTN.

[0399] For example, the UE obtains reselection configuration information for switching / reselecting from the NTN network to the TN network cell and TN network coverage configuration information through the SIB message of the serving cell. When the UE enters the TN network coverage, the UE performs cell reselection measurement on the TN network carrier with high priority.

[0400] Optionally, the UE determines to reselect a cell to a TN network cell in the following manner:

[0401] Mode 1: When the signal strength measured by the UE for the TN network cell is higher than the threshold, the UE reselects to the TN network cell.

[0402] Mode 2: When the signal strength measured by the UE's serving cell is less than the signal strength measured for the TN network cell, the UE reselects to the TN network cell.

[0403] Mode 3: When the signal strength measured by the UE for the TN network cell is higher than the threshold, and when the signal strength measured by the UE's serving cell is lower than the signal strength measured for the TN network cell, the UE reselects to the TN network cell.

[0404] In any of the above embodiments of the present disclosure, part or all of the steps and their optional implementations may be arbitrarily combined with part or all of the steps in other embodiments, or may be arbitrarily combined with optional implementations in other embodiments.

[0405] The embodiments of the present disclosure also provide an apparatus for implementing any of the above communication methods. For example, the apparatus is a terminal, comprising units for implementing each step performed by the terminal 101 in any of the above communication methods. For another example, the apparatus is a network device, comprising units for implementing each step performed by the first network device 102 or the second network device 103 (e.g., an access network device, a core network function node, a core network device, etc.) in any of the above communication methods.

[0406] It should be understood that the division of the various units in the above device is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a physical entity, or they may be physically separated. In addition, the units in the device may be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, the memory stores computer instructions, and the processor calls the computer instructions stored in the memory to implement any of the above communication methods or implement the functions of the various units of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory within the device or a memory outside the device. Alternatively, the units in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units can be realized by designing the hardware circuits. The above-mentioned hardware circuits can be understood as one or more processors. For example, in one implementation, the above-mentioned hardware circuit is an application-specific integrated circuit (ASIC), and the functions of some or all of the above units are realized by designing the logical relationship of the components in the circuit. For another example, in another implementation, the above-mentioned hardware circuit can be implemented by a programmable logic device (PLD). Taking a field programmable gate array (FPGA) as an example, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by a configuration file, thereby realizing the functions of some or all of the above units. All units of the above devices can be implemented in the form of software called by the processor, or in the form of hardware circuits, or in part by software called by the processor, and the rest by hardware circuits.

[0407] In the embodiment of the present disclosure, the processor is a circuit with signal processing capability. In one implementation, the processor can be a circuit with instruction reading and execution capability, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP); in another implementation, the processor can implement certain functions through the logical relationship of the hardware circuit, and the logical relationship of the above hardware circuit is fixed or reconfigurable, such as a hardware circuit implemented by a processor as an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and implementing the hardware circuit configuration can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0408] FIG5 is a schematic diagram of the structure of a terminal provided according to an embodiment of the present disclosure. As shown in FIG5 , the terminal 500 includes:

[0409] The processing module 510 is configured to determine first information, where the first information is used by the terminal to reselect from a serving cell of the first network type to a cell of the second network type; and determine whether to perform cell reselection measurement on the carrier where the cell of the second network type is located based on the first information.

[0410] Optionally, the first network type is a terrestrial network TN, and the second network type is a non-terrestrial network NTN.

[0411] Optionally, the first information includes a first threshold value; the processing module 510 is configured to: if the first signal strength of the serving cell is greater than the first threshold value, not perform cell reselection measurement on the carrier where the cell of the second network type is located.

[0412] Optionally, the first information includes a first threshold value and a second threshold value, wherein the first threshold value is greater than the second threshold value;

[0413] The processing module 510 is configured to: when the first signal strength of the serving cell is less than the first threshold value and the first signal strength is greater than the second threshold value, perform relaxed cell reselection measurement on the carrier where the cell of the second network type is located.

[0414] Optionally, the processing module 510 is configured to: perform relaxed cell reselection measurement on the carrier where the cell of the second network type is located according to a scaling factor; wherein the scaling factor is obtained by any one of the following methods:

[0415] Obtained according to the received first system information block SIB message configuration;

[0416] Determined according to the agreement;

[0417] pre-configured in the terminal.

[0418] Optionally, the first information includes a second threshold value;

[0419] The processing module 510 is configured to: when the first signal strength of the serving cell is less than the second threshold, perform cell reselection measurement on the carrier where the cell of the second network type is located.

[0420] Optionally, the first network type is NTN and the second network type is TN.

[0421] Optionally, the first information includes second information, where the second information indicates TN network coverage;

[0422] The processing module 510 is configured to: when the terminal is within the coverage of the TN network, perform cell reselection measurement on a carrier where a cell of the second network type is located to obtain a second signal strength.

[0423] Optionally, the first information further includes a third threshold value;

[0424] The processing module 510 is configured to determine whether to reselect to a cell of the second network type based at least on the third threshold and the second signal strength.

[0425] Optionally, the processing module 510 is configured to: if the second signal strength is greater than the third threshold, reselect to a cell of the second network type.

[0426] Optionally, the processing module 510 is configured to: if the second signal strength is greater than the first signal strength of the serving cell and the second signal strength is greater than the third threshold, reselect to a cell of the second network type.

[0427] Optionally, the processing module 510 is configured to reselect to a cell of the second network type if the second signal strength is greater than the first signal strength of the serving cell.

[0428] Optionally, the number of cells of the second network type is multiple;

[0429] The processing module 510 is configured to: perform cell reselection measurement on the carrier where each cell of the second network type is located based on the cell priority information carried in the second SIB message.

[0430] Optionally, the first information is carried in a third SIB message.

[0431] Optionally, the first signal strength includes a first synchronization signal reference signal received power SS-RSRP and / or a first synchronization signal reference signal received quality SS-RSRQ.

[0432] Optionally, the second signal strength includes a second SS-RSRP and / or a second SS-RSRQ.

[0433] FIG6 is a schematic diagram of the structure of a network device provided according to an embodiment of the present disclosure. As shown in FIG6 , the network device 600 includes:

[0434] The sending module 610 is configured to send first information to the terminal, where the first information represents configuration information for the terminal to reselect from a serving cell of a first network type to a cell of a second network type.

[0435] Optionally, the first information includes a first threshold value, and the first threshold value is used by the terminal to determine that the first signal strength of the serving cell is greater than the first threshold value, and not to perform cell reselection measurement on the carrier where the cell of the second network type is located.

[0436] Optionally, the first information includes a first threshold value and a second threshold value, wherein the first threshold value is greater than the second threshold value, and the first information is used by the terminal to determine that the first signal strength of the serving cell is less than the first threshold value and the first signal strength is greater than the second threshold value, and to perform relaxed cell reselection measurement on the carrier where the cell of the second network type is located.

[0437] Optionally, the first information includes a second threshold value, and the second threshold value is used by the terminal to determine that the first signal strength of the serving cell is less than the second threshold value, and to perform cell reselection measurement on the carrier where the cell of the second network type is located.

[0438] Optionally, the first information includes second information, the second information indicates the TN network coverage, and the second information is used by the terminal to determine that it is within the TN network coverage, perform cell reselection measurement on the carrier where the cell of the second network type is located, and obtain a second signal strength.

[0439] Optionally, the first information further includes a third threshold value, and the first information is used by the terminal to determine whether to reselect to a cell of the second network type based at least on the third threshold value and the second signal strength.

[0440] Optionally, the first information is carried in a SIB message.

[0441] Regarding the apparatus in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0442] In an exemplary embodiment, the present disclosure further provides a communication system, which may include a terminal 500 and a network device 600 .

[0443] Figure 7 is a schematic diagram of the structure of a communication device 8100 provided according to an embodiment of the present disclosure. The communication device 8100 can be a network device (e.g., an access network device, a core network device, etc.), a terminal (e.g., a user device, etc.), a chip, a chip system, or a processor that supports a network device to implement any of the above communication methods, or a chip, a chip system, or a processor that supports a terminal to implement any of the above communication methods. The communication device 8100 can be used to implement the communication method described in the above communication method embodiments. For details, please refer to the description of the above communication method embodiments.

[0444] As shown in FIG7 , the communication device 8100 includes one or more processors 8101 , and the processor 8101 is configured to call computer instructions so that the communication device 8100 executes any one of the above communication methods.

[0445] Optionally, the communication device 8100 further includes one or more memories 8102 for storing computer instructions. In an alternative embodiment, all or part of the memory 8102 may also be located outside the communication device 8100.

[0446] Optionally, the communication device 8100 further includes one or more transceivers 8103. When the communication device 8100 includes one or more transceivers 8103, the communication steps such as sending and receiving in the above method are performed by the transceiver 8103, and the other steps are performed by the processor 8101.

[0447] The communication device 8100 described in the above embodiment may be a network device or a terminal, but the scope of the communication device 8100 described in the present disclosure is not limited thereto, and the structure of the communication device 8100 may not be limited by FIG. 7 . The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: (1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data or computer programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0448] The above-mentioned communication device 8100 may be a chip or a chip system, but is not limited thereto. For example, the communication device 8100 may be an independent electronic device or a part of an independent electronic device. For example, in one embodiment, the electronic device may be an integrated circuit (IC) or a chip, wherein the integrated circuit may be an IC or a collection of multiple ICs; the chip may include but is not limited to the following types: GPU (Graphics Processing Unit), CPU (Central Processing Unit), FPGA (Field Programmable Gate Array), DSP (Digital Signal Processor), ASIC (Application Specific Integrated Circuit), SOC (System on Chip, SoC, system on chip or system-on-chip), etc. The above-mentioned integrated circuit or chip can be used to execute executable instructions (or codes) to implement the above-mentioned communication method. The executable instructions may be stored in the integrated circuit or chip, or may be obtained from other devices or equipment, such as the integrated circuit or chip including a processor, a memory, and an interface for communicating with other devices. The executable instruction may be stored in the processor, and when the executable instruction is executed by the processor, the above-mentioned communication method is implemented; alternatively, the integrated circuit or chip may receive the executable instruction through the interface and transmit it to the processor for execution, so as to implement the above-mentioned communication method.

[0449] The present disclosure also provides a readable storage medium having computer instructions stored thereon. When the computer instructions are executed on the communication device 8100, the communication device 8100 executes any of the above communication methods. Optionally, the computer-readable storage medium can be a non-transitory computer-readable storage medium or a transitory computer-readable storage medium.

[0450] The present disclosure also provides a computer program product. When the computer program product is executed by the communication device 8100, it enables the communication device 8100 to perform any of the above communication methods.

[0451] It is understandable that the terminal 500, network device 600, communication device 8100, communication system 100, computer-readable storage medium, and computer program product are all used to execute the communication method provided in the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding communication method and will not be repeated here.

[0452] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the present disclosure. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0453] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A communication method, characterized in that: Executed by a terminal, the method includes: Determine first information, where the first information is used by the terminal to reselect from a serving cell of a first network type to a cell of a second network type; Determine whether to perform cell reselection measurement on the carrier where the cell of the second network type is located according to the first information.

2. The method according to claim 1, characterized in that The first network type is a terrestrial network TN, and the second network type is a non-terrestrial network NTN.

3. The method according to claim 2, characterized in that The first information includes a first threshold value; The determining, according to the first information, whether to perform cell reselection measurement on the carrier where the cell of the second network type is located includes: The first signal strength of the serving cell is greater than the first threshold value, and it is determined not to perform cell reselection measurement on the carrier where the cell of the second network type is located.

4. The method according to claim 2, characterized in that: The first information includes a first threshold value and a second threshold value, wherein the first threshold value is greater than the second threshold value; The determining, according to the first information, whether to perform cell reselection measurement on the carrier where the cell of the second network type is located includes: If the first signal strength of the serving cell is less than the first threshold value and the first signal strength is greater than the second threshold value, it is determined to perform relaxed cell reselection measurement on the carrier where the cell of the second network type is located.

5. The method according to claim 4, characterized in that The performing relaxed cell reselection measurement on the carrier where the cell of the second network type is located includes: Performing a relaxed cell reselection measurement on the carrier where the cell of the second network type is located according to the scaling factor; The scaling factor is obtained by any of the following methods: Obtained according to the received first system information block SIB message configuration; Determined according to the agreement; pre-configured in the terminal.

6. The method according to claim 2, characterized in that The first information includes a second threshold value; The determining, according to the first information, whether to perform cell reselection measurement on the carrier where the cell of the second network type is located includes: The first signal strength of the serving cell is less than the second threshold value, and it is determined to perform cell reselection measurement on the carrier where the cell of the second network type is located.

7. The method according to claim 1, characterized in that The first network type is NTN, and the second network type is TN.

8. The method according to claim 7, characterized in that The first information includes second information, where the second information indicates a TN network coverage; The determining, according to the first information, whether to perform cell reselection measurement on the carrier where the cell of the second network type is located includes: The terminal is within the coverage of the TN network, and determines to perform cell reselection measurement on a carrier where a cell of the second network type is located to obtain a second signal strength.

9. The method according to claim 8, characterized in that The first information includes a third threshold value; The method further comprises: Based at least on the third threshold and the second signal strength, it is determined whether to reselect to a cell of the second network type.

10. The method according to claim 9, characterized in that The determining whether to reselect to a cell of the second network type based at least on the third threshold value and the second signal strength includes: The second signal strength is greater than the third threshold value, and the cell of the second network type is reselected.

11. The method according to claim 9, characterized in that The determining whether to reselect to a cell of the second network type based at least on the third threshold value and the second signal strength includes: If the second signal strength is greater than the first signal strength of the serving cell and the second signal strength is greater than the third threshold value, the cell of the second network type is reselected.

12. The method according to claim 8, characterized in that The method further comprises: The second signal strength is greater than the first signal strength of the serving cell, and the cell of the second network type is reselected.

13. The method according to claim 8, characterized in that The number of cells of the second network type is multiple; The performing cell reselection measurement on the carrier where the cell of the second network type is located includes: Based on the cell priority information carried in the second SIB message, cell reselection measurement is performed on the carrier where each cell of the second network type is located.

14. The method according to any one of claims 1 to 13, characterized in that The first information is carried in a third SIB message.

15. The method according to any one of claims 3-6, 11, and 12, characterized in that: The first signal strength includes a first synchronization signal reference signal received power SS-RSRP and / or a first synchronization signal reference signal received quality SS-RSRQ.

16. The method according to any one of claims 8 to 13, characterized in that: The second signal strength includes a second SS-RSRP and / or a second SS-RSRQ.

17. A communication method, characterized in that: Executed by a network device, the method includes: First information is sent to a terminal, where the first information represents configuration information used by the terminal to reselect from a serving cell of a first network type to a cell of a second network type.

18. The method according to claim 17, characterized in that The first information includes a first threshold value, and the first threshold value is used by the terminal to determine that the first signal strength of the serving cell is greater than the first threshold value, and not to perform cell reselection measurement on the carrier where the cell of the second network type is located.

19. The method according to claim 17, characterized in that The first information includes a first threshold value and a second threshold value, wherein the first threshold value is greater than the second threshold value, and the first information is used by the terminal to determine that the first signal strength of the serving cell is less than the first threshold value and the first signal strength is greater than the second threshold value, and to perform relaxed cell reselection measurement on the carrier where the cell of the second network type is located.

20. The method according to claim 17, characterized in that The first information includes a second threshold value, and the second threshold value is used by the terminal to determine that the first signal strength of the serving cell is less than the second threshold value, and to perform cell reselection measurement on the carrier where the cell of the second network type is located.

21. The method according to claim 17, characterized in that The first information includes second information, where the second information indicates a TN network coverage range, and the second information is used by the terminal to determine that it is within the TN network coverage range, perform cell reselection measurement on a carrier where a cell of the second network type is located, and obtain a second signal strength.

22. The method according to claim 21, characterized in that The first information further includes a third threshold value, and the first information is used by the terminal to determine whether to reselect to a cell of the second network type based at least on the third threshold value and the second signal strength.

23. A terminal, characterized in that: The terminal comprises: The processing module is configured to determine first information, where the first information is used by the terminal to reselect from a serving cell of the first network type to a cell of the second network type; and determine whether to perform cell reselection measurement on a carrier where the cell of the second network type is located based on the first information.

24. A network device, characterized in that: The network equipment includes: The sending module is configured to send first information to the terminal, where the first information represents configuration information used by the terminal to reselect from a serving cell of a first network type to a cell of a second network type.

25. A communication device, characterized in that: include: a memory having a computer program stored thereon; A processor, configured to execute the computer program in the memory to implement the steps of the communication method according to any one of claims 1 to 22.

26. A communication system, characterized in that: It comprises a terminal and a network device, wherein the terminal is configured to implement the communication method according to any one of claims 1 to 16, and the network device is configured to implement the communication method according to any one of claims 17 to 22.

27. A computer-readable storage medium storing computer instructions, characterized in that: When the computer instructions are executed on a communication device, the communication device is caused to execute the communication method according to any one of claims 1 to 22.

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