NAS timer processing method and apparatus, and terminal and network-side device

Abstract

The present application belongs to the technical field of communications. Disclosed are an NAS timer processing method and apparatus, and a terminal and a network-side device. The method in the embodiments of the present application comprises: in a store and forward operation mode, a terminal executing a first operation, wherein the first operation comprises any one of the following: not enabling a first non-access stratum (NAS) timer; on the basis of a first time value, setting the value of the first NAS timer, the first time value being a time value used for the store and forward operation mode; and on the basis of first information, setting the first NAS timer, the first information being used for indicating store and forward operation assistance information.

Description

NAS timer processing method, device, terminal and network side equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese Patent Application No. 202410043622.6 filed in China on January 11, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application belongs to the field of communication technology, and specifically relates to a NAS timer processing method, apparatus, terminal, and network-side equipment. Background Art

[0004] Non-access stratum (NAS) timers are various guard timers used in communications between terminals and core network control nodes, ensuring the normal transmission and reception of NAS messages. In store-and-forward (S&F) operation mode, since terminal NAS messages must be relayed via satellite, the service link becomes longer, increasing the probability of NAS timer expiration and the likelihood of NAS process failure for the terminal. Summary of the Invention

[0005] The embodiments of the present application provide a NAS timer processing method, apparatus, terminal, and network-side device, which can solve the problem of a high probability of failure of the NAS process of the terminal.

[0006] In a first aspect, a NAS timer processing method is provided, including:

[0007] In the store-and-forward operation mode, the terminal performs a first operation;

[0008] The first operation includes any one of the following:

[0009] Do not start the first non-access layer NAS timer;

[0010] setting a value of a first NAS timer based on a first time value, the first time value being a time value for the store-and-forward mode of operation;

[0011] A first NAS timer is set based on first information, where the first information is used to indicate store-and-forward operation assistance information.

[0012] In a second aspect, a NAS timer processing method is provided, including:

[0013] In the store-and-forward operation mode, the core network device performs a second operation;

[0014] The second operation includes any one of the following:

[0015] Do not start the second NAS timer;

[0016] setting a value of a second NAS timer based on the second time value;

[0017] setting a second NAS timer based on the first information;

[0018] Sending first information to the terminal;

[0019] The first information is used to indicate store-and-forward operation auxiliary information, and the second time value is a time value used for the store-and-forward operation mode.

[0020] According to a third aspect, a NAS timer processing device is provided. The terminal includes the NAS timer processing device, including:

[0021] An execution module, configured to execute a first operation in a store-and-forward operation mode;

[0022] The first operation includes any one of the following:

[0023] Do not start the first non-access layer NAS timer;

[0024] setting a value of a first NAS timer based on a first time value, the first time value being a time value for the store-and-forward mode of operation;

[0025] A first NAS timer is set based on first information, where the first information is used to indicate store-and-forward operation assistance information.

[0026] In a fourth aspect, a NAS timer processing device is provided. The core network device includes the NAS timer processing device, including:

[0027] An execution module, configured to execute a second operation in a store-and-forward operation mode;

[0028] The second operation includes any one of the following:

[0029] Do not start the second NAS timer;

[0030] setting a value of a second NAS timer based on the second time value;

[0031] setting a second NAS timer based on the first information;

[0032] Sending first information to the terminal;

[0033] The first information is used to indicate store-and-forward operation auxiliary information, and the second time value is a time value used for the store-and-forward operation mode.

[0034] In a fifth aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

[0035] In a sixth aspect, a network side device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the second aspect are implemented.

[0036] In a seventh aspect, a terminal is provided, including a processor and a communication interface, wherein the processor is configured to:

[0037] In a store-and-forward operation mode, performing a first operation;

[0038] The first operation includes any one of the following:

[0039] Do not start the first non-access layer NAS timer;

[0040] setting a value of a first NAS timer based on a first time value, the first time value being a time value for the store-and-forward mode of operation;

[0041] A first NAS timer is set based on first information, where the first information is used to indicate store-and-forward operation assistance information.

[0042] In an eighth aspect, a network-side device is provided, where the network-side device is a core network device, including a processor and a communication interface, wherein the processor is configured to:

[0043] In the store-and-forward mode of operation, performing a second operation;

[0044] The second operation includes any one of the following:

[0045] Do not start the second NAS timer;

[0046] setting a value of a second NAS timer based on the second time value;

[0047] setting a second NAS timer based on the first information;

[0048] Sending first information to the terminal;

[0049] The first information is used to indicate store-and-forward operation auxiliary information, and the second time value is a time value used for the store-and-forward operation mode.

[0050] In a ninth aspect, a NAS timer processing system is provided, including: a terminal and a network-side device, wherein the terminal can be used to execute the steps of the method described in the first aspect, and the network-side device can be used to execute the steps of the method described in the second aspect.

[0051] In the tenth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect or the steps of the method described in the second aspect are implemented.

[0052] In the eleventh aspect, a chip is provided, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the method as described in the first aspect, or to implement the method as described in the second aspect.

[0053] In the twelfth aspect, a computer program / program product is provided, which is stored in a storage medium and executed by at least one processor to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0054] In an embodiment of the present application, in the store-and-forward operation mode, the NAS timer is not started; or the NAS timer in the store-and-forward operation mode is set based on a first time value; or the NAS timer in the store-and-forward operation mode is set based on first information. In this way, by avoiding the use of a general NAS timer in the store-and-forward operation mode and specifically setting the NAS timer in the store-and-forward operation mode, the probability of failure of the NAS process of the terminal can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] FIG1 is a block diagram of a wireless communication system to which embodiments of the present application may be applied;

[0056] FIG2 is a schematic diagram of a non-terrestrial network provided in an embodiment of the present application;

[0057] FIG3 is a flowchart of a NAS timer processing method according to an embodiment of the present application;

[0058] FIG4 is a second flowchart of a NAS timer processing method provided in an embodiment of the present application;

[0059] FIG5 is a third flowchart of a NAS timer processing method provided in an embodiment of the present application;

[0060] FIG6 is a fourth flowchart of a NAS timer processing method provided in an embodiment of the present application;

[0061] FIG7 is a fifth flowchart of a NAS timer processing method provided in an embodiment of the present application;

[0062] FIG8 is a sixth flowchart of a NAS timer processing method provided in an embodiment of the present application;

[0063] FIG9 is a structural diagram of a NAS timer processing device according to an embodiment of the present application;

[0064] FIG10 is a second structural diagram of a NAS timer processing device according to an embodiment of the present application;

[0065] FIG11 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0066] FIG12 is a schematic structural diagram of a terminal provided in an embodiment of the present application;

[0067] FIG13 is a schematic structural diagram of a network-side device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0068] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0069] The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same type, and do not limit the number of objects, for example, the first object can be one or more. In addition, "or" in this application represents at least one of the connected objects. For example, "A or B" covers three options, namely, Option 1: including A but not including B; Option 2: including B but not including A; Option 3: including both A and B. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0070] The term "indication" in this application can be either a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, the operation to be performed, or the requested result, etc. in the instruction sent; an indirect indication can be understood as the receiver determining the corresponding information based on the instruction sent by the sender, or making a judgment and determining the operation to be performed or the requested result, etc. based on the judgment result.

[0071] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the technology described can be used for the systems and radio technologies mentioned above, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to systems other than NR systems, such as 6th generation (6G) systems. th Generation, 6G) communication system.

[0072] FIG1 is a block diagram of a wireless communication system applicable to an embodiment of the present application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR), a virtual reality (VR) device, a robot, a wearable device (Wearable Device), an aircraft (Flight Vehicle), a vehicle-mounted device (VUE), a ship-mounted device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), a game console, a personal computer (PC), an ATM, or a self-service machine, or other terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be called a radio access network (Radio Access Network, RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (WLAN) access point (AS) or a wireless fidelity (WiFi) node, etc.Among them, the base station can be referred to as Node B (NB), Evolved Node B (eNB), the next generation Node B (gNB), New Radio Node B (NR Node B), access point, relay base station (RBS), serving base station (SBS), base transceiver station (BTS), radio base station, radio transceiver, basic service set (BSS), extended service set (ESS), home Node B (HNB), home evolved Node B (home evolved Node B), transmission reception point (TRP) or other appropriate terms in the relevant field. As long as the same technical effect is achieved, the base station is not limited to specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example to introduce, and the specific type of the base station is not limited.

[0073] The core network equipment may include but is not limited to at least one of the following: core network node, core network function, mobility management entity (MME), access mobility management function (AMF), session management function (SMF), user plane function (UPF), policy control function (PCF), policy and charging rules function unit (PCRF), edge application service discovery function (EASDF), unified data management (UDM), unified data repository (UDR), home user server (HSS), centralized network configuration (CNC), network storage function (NRF), network exposure function (NEF), local NEF (L-NEF), binding support function (BSF), application function ( Function, AF), Location Management Function (LMF), Gateway Mobile Location Centre (GMLC), Network Data Analytics Function (NWDAF), etc. It should be noted that in the embodiment of the present application, only the core network equipment in the NR system is taken as an example to introduce, and the specific type of the core network equipment is not limited.

[0074] For ease of understanding, some terms involved in the embodiments of this application are explained below:

[0075] 1.NAS timer

[0076] NAS timers are guard timers used in communications between user equipment (UE) and core network control nodes. NAS timer values ​​are typically in seconds or minutes. They are a mechanism for ensuring the normal transmission and reception of NAS messages. For example, a UE starts T3410 (15 seconds) after sending an attach request. When the attach request is accepted or rejected, the UE stops T3410. However, when T3410 times out, meaning the UE has not received any response to the attach request, the UE deems a problem with the attach process (e.g., poor radio link quality or damaged core network elements). The UE aborts the attach process and locally releases the NAS connection. The UE and the network each maintain their own NAS timers.

[0077] The extended NAS timer is a special extension of the NAS timer value due to issues such as MTC, such as coverage enhancement (for example, air interface transmission delay can lead to longer NAS layer response time). For example, due to longer air interface delays in NB IoT, the NAS timer related to mobility management is increased by 240s, and the NAS timer related to session management is increased by 180s.

[0078] 2. Non-Terrestrial Network (NTN)

[0079] Compared to terrestrial communication systems, satellite-based non-terrestrial communication systems offer a wider coverage area. Typical applications include situations where ground base stations are impractical or damaged, such as requiring continuous coverage in remote mountainous areas, deserts, oceans, or forests. Typical scenarios for satellite-based non-terrestrial communication systems include transparent forwarding, where the satellite acts as a forwarding relay, as shown in Figure 2. The link between the satellite and the terminal is the service link, and the link between the satellite and the terrestrial base station is the feeder link.

[0080] The Store and Forward (S&F) mode of operation is a fifth generation mobile communication technology with satellite access (5 th An operating mode of a 5G (5th Generation Mobile Communication Technology) system in which, when satellite connectivity is intermittent or temporarily unavailable, the 5G system can provide a certain level of service (such as store and forward data) to provide communication services to terminals under satellite coverage without the need for simultaneous active feeder connections to ground stations.

[0081] The following, in conjunction with the accompanying drawings, describes in detail the NAS timer processing method, apparatus, terminal, and network-side device provided in the embodiments of the present application through some embodiments and their application scenarios.

[0082] 3 , which is a flow chart of a NAS timer processing method provided in an embodiment of the present application. As shown in FIG3 , the NAS timer processing method includes the following steps:

[0083] Step 101: In the store-and-forward operation mode, the terminal performs a first operation;

[0084] The first operation includes any one of the following:

[0085] Do not start the first non-access layer NAS timer;

[0086] setting a value of a first NAS timer based on a first time value, the first time value being a time value for the store-and-forward mode of operation;

[0087] A first NAS timer is set based on first information, where the first information is used to indicate store-and-forward operation assistance information.

[0088] The first NAS timer is a NAS timer in the store-and-forward operation mode.

[0089] Not starting the first NAS timer may be understood as not starting the NAS timer in the store-and-forward operation mode.

[0090] In addition, the first time value may be a preconfigured timer value; or a timer value predefined by a protocol.

[0091] In one embodiment, the first time value is a time value dedicated to the store-and-forward operation mode.

[0092] Among them, the term "in the store-and-forward operation mode" can be understood as the terminal being in the store-and-forward operation mode; or it can be understood as the terminal and the core network device being in the store-and-forward operation mode, and the core network device being the core network device to which the terminal is connected; or it can be understood as the terminal, the access network device and the core network device being in the store-and-forward operation mode, and the access network device being the access network device to which the terminal is connected, and the core network device being the core network device to which the terminal is connected.

[0093] In addition, before executing the first operation, the terminal may determine whether it is in a store-and-forward operation mode. The determination of whether the terminal is in a store-and-forward operation mode can be understood as the terminal determining whether the terminal is in a store-and-forward operation mode; or can be understood as the terminal determining whether the terminal and a core network device are in a store-and-forward operation mode, where the core network device is a core network device to which the terminal is connected; or can be understood as the terminal determining whether the terminal, an access network device, and a core network device are in a store-and-forward operation mode, where the access network device is an access network device to which the terminal is connected, and the core network device is a core network device to which the terminal is connected.

[0094] It should be noted that the store-and-forward (S&F) operation mode can be understood as a communication mode. This mode can also be described as store and forward mode. Alternatively, it can be abbreviated as S&F mode. In this mode, NAS messages from the terminal are relayed via the satellite.

[0095] In addition, the first NAS timer may be a NAS timer of the terminal in the store-and-forward operation mode, and the first NAS timer may be used for sending or receiving NAS messages between the terminal and the core network device.

[0096] In addition, the value of the NAS timer may be a timeout value of the NAS timer.

[0097] In one implementation, the terminal sets a NAS timer in the store-and-forward operation mode.

[0098] For example, after determining that the operation mode is store-and-forward, the terminal uses a preconfigured NAS timer value dedicated to the store-and-forward operation mode; for example, the terminal determines the NAS timer value for the store-and-forward operation mode based on the first indication information or first information received from the network side; for example, when the terminal determines that the operation mode is store-and-forward, the terminal determines not to start the NAS timer or sets the NAS timer to infinity.

[0099] In one implementation, the terminal obtains the first indication information or the first information, and sets the NAS timer according to the first indication information or the first information;

[0100] In one embodiment, the terminal obtains the first indication information or the first information including at least one of the following:

[0101] The terminal receives a system information block (SIB) message, where the SIB message carries the first indication information or the first information:

[0102] The terminal sends an attach request and receives an attach reject message, where the attach reject message carries the first indication information or the first information:

[0103] The terminal sends an attach request and receives an attach accept message, where the attach accept message carries the first indication information or the first information;

[0104] The terminal sends a registration request message and receives a registration reject message, where the registration reject message carries the first indication information or the first information:

[0105] The terminal sends a registration request (registration request) message and receives a registration accept (registration accept) message, where the registration accept message carries the first indication information or the first information.

[0106] In one implementation, the terminal sets the NAS timer according to the first indication information or the first information, including any one of the following:

[0107] Using the configured NAS timer for the store-and-forward mode of operation according to the first indication information;

[0108] Setting a NAS timer for the store-and-forward operation mode according to the first information, for example, by adding a satellite operation period to an existing NAS timer value when setting the NAS timer value;

[0109] The terminal sets a NAS timer based on the implementation that is applicable to the store-and-forward mode of operation;

[0110] The terminal abandons the use of NAS timer in store-and-forward operation mode.

[0111] In an embodiment of the present application, in the store-and-forward operation mode, the NAS timer is not started; or the NAS timer in the store-and-forward operation mode is set based on a first time value; or the NAS timer in the store-and-forward operation mode is set based on first information. In this way, by avoiding the use of a general NAS timer in the store-and-forward operation mode and specifically setting the NAS timer in the store-and-forward operation mode, the probability of failure of the NAS process of the terminal can be reduced.

[0112] Optionally, before the terminal performs the first operation, the method further includes:

[0113] The terminal determines whether to be in the store-and-forward operation mode according to pre-configuration information.

[0114] The pre-configuration information can be used to indicate the scope of application of the store-and-forward operation mode, including but not limited to: geographical location or regional location, network information. The geographical location or regional location can be represented by geolocation, Tracking Area Identity (TAI) or cell identity (ID). The network information can be represented by a Public Land Mobile Network (PLMN) ID or a Stand-alone Non-Public Network (SNPN) ID. The terminal can determine whether its own geographical location or regional location or network information is within the scope of application of the store-and-forward operation mode to determine whether it is in the store-and-forward operation mode. For example, the pre-configuration information can be used to indicate the cell ID of one or more cells to which the store-and-forward operation mode is applicable. When the cell ID of the cell to which the terminal belongs is among the cell IDs of one or more cells to which the store-and-forward operation mode is applicable, the terminal determines that it is in the store-and-forward operation mode.

[0115] In this embodiment, the terminal determines whether it is in the store-and-forward operation mode based on pre-configured information. When it is determined that it is in the store-and-forward operation mode, the terminal does not start the NAS timer; or sets the NAS timer in the store-and-forward operation mode based on the first time value; or sets the NAS timer in the store-and-forward operation mode based on the first information. In this way, the NAS timer in the store-and-forward operation mode can be specifically set, thereby reducing the probability of failure of the NAS process of the terminal.

[0116] Optionally, the preconfiguration information is used to indicate at least one of the following:

[0117] The location information corresponding to the store-and-forward operation mode; and the network information corresponding to the store-and-forward operation mode.

[0118] The location information corresponding to the store-and-forward operation mode may refer to location information to which the store-and-forward operation mode is applicable. The network information corresponding to the store-and-forward operation mode may refer to network information to which the store-and-forward operation mode is applicable. The location information corresponding to the store-and-forward operation mode may include geographic location information or regional location information corresponding to the store-and-forward operation mode.

[0119] In one implementation, the location information may be information indicating the aforementioned geographical location or regional location.

[0120] In this embodiment, the terminal can determine whether it is in the store-and-forward operation mode based on the location information corresponding to the store-and-forward operation mode or the network information corresponding to the store-and-forward operation mode, thereby being able to specifically set the NAS timer in the store-and-forward operation mode.

[0121] Optionally, the terminal determines whether it is in the store-and-forward operation mode according to preconfiguration information, including at least one of the following:

[0122] The terminal determines whether it is in the store-and-forward operation mode based on whether the location information of the terminal matches the location information corresponding to the store-and-forward operation mode;

[0123] The terminal determines whether to be in the store-and-forward operation mode based on whether the selected network information matches the network information corresponding to the store-and-forward operation mode.

[0124] In one embodiment, the terminal determines that it is in the store-and-forward operation mode when it is determined that the location information of the terminal matches the location information corresponding to the store-and-forward operation mode. The matching of the location information of the terminal with the location information corresponding to the store-and-forward operation mode may mean that the geographical location or regional location of the terminal matches the geographical location or regional location to which the store-and-forward operation mode is applicable. The matching of the geographical location or regional location of the terminal with the geographical location or regional location to which the store-and-forward operation mode is applicable may be understood as the geographical location or regional location of the terminal being within the geographical location or regional location to which the store-and-forward operation mode is applicable. For example, if the geolocation of the terminal is within the geolocation to which the store-and-forward operation mode is applicable, it can be considered that the location information of the terminal matches the location information corresponding to the store-and-forward operation mode; or, if the TAI of the terminal is within the TAI to which the store-and-forward operation mode is applicable, it can be considered that the location information of the terminal matches the location information corresponding to the store-and-forward operation mode; or, if the cell ID of the cell to which the terminal belongs is among the cell IDs of one or more cells to which the store-and-forward operation mode is applicable, it can be considered that the location information of the terminal matches the location information corresponding to the store-and-forward operation mode.

[0125] In one embodiment, the terminal determines that it is in the store-and-forward operation mode when it determines that the selected network information matches the network information corresponding to the store-and-forward operation mode. The matching of the selected network information and the network information corresponding to the store-and-forward operation mode can be understood as meaning that the network selected by the terminal is among the networks applicable to the store-and-forward operation mode. For example, if the network information corresponding to the store-and-forward operation mode includes a PLMN ID, and the PLMN ID of the network selected by the terminal is within the PLMN ID included in the network information corresponding to the store-and-forward operation mode, it can be considered that the selected network information matches the network information corresponding to the store-and-forward operation mode.

[0126] In one embodiment, the terminal determines that it is in the store-and-forward operation mode when it determines that the selected network information matches the network information corresponding to the store-and-forward operation mode and the location information of the terminal matches the location information corresponding to the store-and-forward operation mode.

[0127] Optionally, in the store-and-forward operation mode, before the terminal performs the first operation, the method further includes:

[0128] The terminal determines whether it is in the store-and-forward operation mode based on the first indication information;

[0129] The first indication information is used to indicate at least one of the following:

[0130] whether the first cell supports a store-and-forward mode of operation;

[0131] one or more cells in a store-and-forward mode of operation;

[0132] whether the cell where the terminal is located is in a store-and-forward operation mode;

[0133] Whether the cell where the terminal is located supports a store-and-forward operation mode;

[0134] whether the terminal is in a store-and-forward mode of operation;

[0135] whether the terminal supports a store-and-forward mode of operation;

[0136] Whether the store-and-forward mode of operation is available.

[0137] Among them, the terminal can obtain the first indication information from the access network device (such as a base station), and the first indication information can be included in a broadcast message or a radio resource control (Radio Resource Control, RRC) message, for example, the broadcast message can be SIB31 (SystemInformationBlockType31) or SIB32, and the RRC message can be an RRC connection reconfiguration message or an RRC connection establishment message; or, the terminal can obtain the first indication information from the core network device (such as MME), and the first indication information can be carried in a response message of the core network device to the first message sent to the terminal, and the first message can include: a registration request message, an attachment request message, a tracking area update request message, a service request message, a deregistration request message, etc.

[0138] Optionally, the terminal may obtain the first indication information from an access network device (e.g., a base station), including the access network device (e.g., a base station) broadcasting the first indication information, and the terminal obtaining the first indication information from a lower layer. For example, the first indication information may specifically be "store-and-forward operation mode indication" or "store-and-forward operation mode available."

[0139] It should be noted that the access network device (eg, base station) may broadcast the first indication information in the cell covered by itself.

[0140] In one embodiment, an access network device (e.g., a base station) may determine a cell in its own covered cell to which the store-and-forward operation mode is applicable, and broadcast first indication information in the determined cell to which the store-and-forward operation mode is applicable, the first indication information indicating at least one of the following: the first cell supports the store-and-forward operation mode; one or more cell identifiers in the store-and-forward operation mode; the cell where the terminal is located is in the store-and-forward operation mode; the cell where the terminal is located supports the store-and-forward operation mode; the terminal is in the store-and-forward operation mode; the terminal supports the store-and-forward operation mode; and the store-and-forward operation mode is available. Alternatively, an access network device (e.g., a base station) may determine a cell in its own covered cell to which the store-and-forward operation mode is not applicable, and broadcast first indication information in the determined cell to which the store-and-forward operation mode is not applicable, the first indication information indicating at least one of the following: the first cell does not support the store-and-forward operation mode; one or more cell identifiers that do not support the store-and-forward operation mode; the cell where the terminal is located is not in the store-and-forward operation mode; the cell where the terminal is located does not support the store-and-forward operation mode; the terminal is not in the store-and-forward operation mode; the terminal does not support the store-and-forward operation mode; and the store-and-forward operation mode is unavailable.

[0141] In one embodiment, for an access network device (such as a base station) that does not support the store-and-forward operation mode or is not in the store-and-forward operation mode, the access network device may broadcast a first indication information in the cell covered by itself, and the first indication information indicates at least one of the following: the first cell does not support the store-and-forward operation mode; one or more cell identifiers that do not support the store-and-forward operation mode; the cell where the terminal is located is not in the store-and-forward operation mode; the cell where the terminal is located does not support the store-and-forward operation mode; the terminal is not in the store-and-forward operation mode; the terminal does not support the store-and-forward operation mode; the store-and-forward operation mode is not available.

[0142] In one embodiment, when the first indication information indicates at least one of the following, the terminal determines that it is in the store-and-forward operation mode:

[0143] The first cell supports a store-and-forward operation mode, wherein the first cell is a cell where the terminal is located;

[0144] One or more cells in a store-and-forward operation mode, wherein the one or more cells include a cell where the terminal is located; the cell where the terminal is located is in the store-and-forward operation mode;

[0145] The cell where the terminal is located supports a store-and-forward operation mode;

[0146] The terminal is in a store-and-forward mode of operation;

[0147] The terminal supports a store-and-forward mode of operation;

[0148] Store-and-forward mode of operation is available.

[0149] In one implementation, when the first indication information indicates that the first cell supports the store-and-forward mode, if the terminal is in the first cell, the terminal is determined to be in the store-and-forward operation mode.

[0150] In one implementation, when the first indication information indicates one or more cells in the store-and-forward operation mode, if the terminal is within any one of the one or more cells, the terminal is determined to be in the store-and-forward operation mode.

[0151] In this embodiment, the terminal determines whether it is in the store-and-forward operation mode based on the first indication information. When it is determined that it is in the store-and-forward operation mode, the terminal does not start the NAS timer; or sets the NAS timer in the store-and-forward operation mode based on the first time value; or sets the NAS timer in the store-and-forward operation mode based on the first information. In this way, the NAS timer in the store-and-forward operation mode can be specifically set, thereby reducing the probability of failure of the NAS process of the terminal.

[0152] Optionally, before the terminal determines whether it is in the store-and-forward operation mode based on the first indication information, the method further includes:

[0153] The terminal receives the first indication information sent by the access network device.

[0154] Optionally, the method further includes:

[0155] The terminal sends a first request message to the core network device;

[0156] The terminal receives a first response message sent by the core network device;

[0157] Wherein, in the case where the first response message indicates that the core network device accepts the first request message, the first response message includes at least one of the following: the first indication information; the first information;

[0158] In the case where the first response message indicates that the core network device rejects the first request message, the first response message includes at least one of the following: the first indication information; the first information; first rejection information;

[0159] The first rejection information is used to indicate the reason for rejecting the first request message.

[0160] The first request message may include at least one of the following: a registration request message, an attach request message, a tracking area update request message, a service request message, and a deregistration request message.

[0161] In one implementation, the first rejection information may include at least one of the following:

[0162] Indication that only store-and-forward mode is supported or allowed.

[0163] Instruction information used to instruct the terminal to enter or start the store-and-forward operation mode.

[0164] Among them, the core network device can be MME or AMF, etc.

[0165] In one embodiment, when the terminal determines that it has not received a first response message corresponding to the first request message, and the first request message includes second indication information, the terminal determines that it is in the store-and-forward operation mode;

[0166] The second indication information is used to indicate that the terminal supports the store-and-forward operation mode or to indicate that the terminal supports store-and-forward service registration.

[0167] It should be noted that when the core network device receives the first request message sent by the terminal, the core network device can send the first indication information or the first information to the terminal. That is, the core network device can be functionally enhanced so that the core network device has the ability to send the first indication information or the first information to the terminal.

[0168] In one embodiment, when the core network device is a core network device on a satellite, the first indication information may indicate at least one of the following: the cell where the terminal is located is in the store-and-forward operation mode; the cell where the terminal is located supports the store-and-forward operation mode; the terminal is in the store-and-forward operation mode; the terminal supports the store-and-forward operation mode; the store-and-forward operation mode is available; and the core network device supports and accepts the store-and-forward operation mode. Alternatively, when the core network device is not a core network device on a satellite, the first indication information may indicate at least one of the following: the cell where the terminal is located is not in the store-and-forward operation mode; the cell where the terminal is located does not support the store-and-forward operation mode; the terminal is not in the store-and-forward operation mode; the terminal does not support the store-and-forward operation mode; the store-and-forward operation mode is unavailable; and the core network device does not support or accept the store-and-forward operation mode.

[0169] In one embodiment, for a core network device that does not support the store-and-forward operation mode or is not in the store-and-forward operation mode, when the core network device receives a first request message sent by a terminal, the core network device may send a first indication information to the terminal, and the first indication information indicates at least one of the following: the cell where the terminal is located is not in the store-and-forward operation mode; the cell where the terminal is located does not support the store-and-forward operation mode; the terminal is not in the store-and-forward operation mode; the terminal does not support the store-and-forward operation mode; the store-and-forward operation mode is not available; the core network device does not support or accept the store-and-forward operation mode.

[0170] In one embodiment, the core network device receives the location information or network information of the terminal from the access network device. The core network device can determine whether the location information of the terminal is the location information corresponding to the store-and-forward operation mode, or determine whether the network information of the terminal is the network information corresponding to the store-and-forward operation mode, that is, determine whether the location information or network information of the terminal is within the applicable scope of the store-and-forward operation mode. In the case where the core network device determines that the location information or network information of the terminal is within the applicable scope of the store-and-forward operation mode, the core network device can send first indication information to the terminal, and the first indication information can indicate at least one of the following: the cell where the terminal is located is in the store-and-forward operation mode; the cell where the terminal is located supports the store-and-forward operation mode; the terminal is in the store-and-forward operation mode; the terminal supports the store-and-forward operation mode; the store-and-forward operation mode is available.

[0171] In this implementation, the terminal sends a first request message to the core network device, and the terminal receives a first response message sent by the core network device, so that the terminal can obtain the first indication information or the first information through the first response message, and can determine whether it is in the store-and-forward operation mode based on the first indication information, or can set the NAS timer in the store-and-forward operation mode based on the first information.

[0172] Optionally, the method further includes:

[0173] The terminal sends a second request message to the core network device;

[0174] If the terminal determines that a second response message corresponding to the second request message is not received, and the second request message includes second indication information, the terminal determines that it is in a store-and-forward operation mode;

[0175] The second indication information is used to indicate that the terminal supports the store-and-forward operation mode.

[0176] The second request message may be the same as or different from the first request message.

[0177] In one embodiment, the second indication information is carried in at least one of the following items:

[0178] Mobility management capability information element; system update type information element; registration type information element; new addition information element.

[0179] In one implementation, the mobility management capability information element may be a 5G mobility management (5G Mobility Management, 5GMM) capability information element.

[0180] In one implementation, the system update type information element may be a 5G system (5G System, 5GS) update type (update type) information element.

[0181] In one implementation, the registration type information element may be a 5GS registration type information element.

[0182] In this embodiment, the terminal can determine whether it is in the store-and-forward operation mode by sending a second request message to the core network device. When it is determined that it is in the store-and-forward operation mode, the NAS timer is not started; or the NAS timer in the store-and-forward operation mode is set based on the first time value; or the NAS timer in the store-and-forward operation mode is set based on the first information. In this way, the NAS timer in the store-and-forward operation mode can be specifically set, which can reduce the probability of failure of the NAS process of the terminal.

[0183] Optionally, the first information includes at least one of the following:

[0184] Ephemeris information; satellite cycle; store-and-forward operation processing time; service link establishment delay; feedback link establishment delay.

[0185] Optionally, the setting of the first NAS timer based on the first information includes at least one of the following:

[0186] Setting a value of a first NAS timer based on the ephemeris information or the satellite cycle;

[0187] setting a value of the first NAS timer based on a value of the third NAS timer and the store-and-forward operation processing time;

[0188] Setting a value of the first NAS timer based on a value of the third NAS timer and the service link establishment delay;

[0189] Setting a value of the first NAS timer based on a value of the third NAS timer and the feedback link establishment delay;

[0190] The third NAS timer and the first NAS timer are different NAS timers.

[0191] The third NAS timer may be an existing NAS timer. The third NAS timer may include a mobility management timer and a session management timer.

[0192] In one embodiment, setting the value of the first NAS timer based on the value of the third NAS timer and the store-and-forward operation processing time may include setting the value of the first NAS timer as the sum of the value of the third NAS timer and the store-and-forward operation processing time; or setting the value of the first NAS timer to be greater than the sum of the value of the third NAS timer and the store-and-forward operation processing time.

[0193] In one implementation, setting the value of the first NAS timer based on the value of the third NAS timer and the service link establishment delay may include: setting the sum of the value of the third NAS timer and the value of the service link establishment delay as the value of the first NAS timer; or setting the value of the first NAS timer to be greater than the sum of the value of the third NAS timer and the value of the service link establishment delay.

[0194] In one implementation, setting the value of the first NAS timer based on the value of the third NAS timer and the feedback link establishment delay may include: setting the sum of the value of the third NAS timer and the value of the feedback link establishment delay as the value of the first NAS timer; or setting the value of the first NAS timer to be greater than the sum of the value of the third NAS timer and the value of the feedback link establishment delay.

[0195] In this embodiment, the value of the first NAS timer is set based on the ephemeris information or the satellite period, thereby taking into account satellite-related information in setting the NAS timer in the store-and-forward operation mode. Alternatively, the value of the first NAS timer is set based on the value of the third NAS timer and the store-and-forward operation processing time. Alternatively, the value of the first NAS timer is set based on the value of the third NAS timer and the service link establishment delay. Alternatively, the value of the first NAS timer is set based on the value of the third NAS timer and the feedback link establishment delay. Thus, various delays caused by NAS messages being relayed through satellites can be taken into account, and the NAS timers in the store-and-forward operation mode can be specifically set, thereby reducing the probability of NAS process failure of the terminal.

[0196] Optionally, setting the value of the first NAS timer based on the first time value includes any one of the following:

[0197] Setting the value of the first NAS timer to an infinite value;

[0198] Setting the value of the first NAS timer to a preconfigured timer value;

[0199] The value of the first NAS timer is set to a timer value predefined by the protocol.

[0200] In this implementation, the value of the first NAS timer is set to an infinite value; or, the value of the first NAS timer is set to a preconfigured timer value; or, the value of the first NAS timer is set to a timer value predefined by the protocol. In this way, by specifically setting the NAS timer in the store-and-forward operation mode, the probability of failure of the NAS process of the terminal can be reduced.

[0201] It should be noted that if the UE accesses the satellite access S&F operator mode, the UE's NAS message request needs to be forwarded through the satellite relay, which increases the service link length. If the legacy NAS timer (second or minute level NAS timer) is still used to ensure the transmission and reception of NAS signaling in the S&F operation mode, the NAS process is likely to fail. The embodiments of the present application adjust the NAS timer for the S&F operation mode to ensure the normal transmission and reception of NAS signaling.

[0202] Optionally, the method further includes:

[0203] The terminal sends the first information to the core network device.

[0204] In this implementation, the terminal sends the first information to the core network device, so that the core network device can set a second NAS timer based on the first information. The second NAS timer is the NAS timer of the core network device in the store-and-forward operation mode, thereby adjusting the NAS timer of the core network device and ensuring normal transmission and reception of NAS signaling.

[0205] 4 is a flowchart of a NAS timer processing method provided in an embodiment of the present application. As shown in FIG4 , the NAS timer processing method includes the following steps:

[0206] Step 201: In the store-and-forward operation mode, the core network device performs a second operation;

[0207] The second operation includes any one of the following:

[0208] Do not start the second NAS timer;

[0209] setting a value of a second NAS timer based on the second time value;

[0210] setting a second NAS timer based on the first information;

[0211] Sending first information to the terminal;

[0212] The first information is used to indicate store-and-forward operation auxiliary information, and the second time value is a time value used for the store-and-forward operation mode.

[0213] The second NAS timer is a NAS timer in the store-and-forward operation mode.

[0214] Not starting the second NAS timer may be understood as the core network device not starting the NAS timer in the store-and-forward operation mode.

[0215] In addition, the second time value may be a preconfigured timer value; or a timer value predefined by a protocol.

[0216] In one embodiment, the second time value is a time value dedicated to the store-and-forward operation mode.

[0217] It should be noted that the second NAS timer may be a NAS timer of the core network device in the store-and-forward operation mode, and the second NAS timer may be used for sending or receiving NAS messages between the core network device and the terminal.

[0218] In one implementation, a core network device (such as an MME) sets a NAS timer for a store-and-forward operation mode.

[0219] For example, after determining that it is a store-and-forward operation mode, the core network device uses a preconfigured NAS timer value dedicated to the store-and-forward operation mode; for example, the core network device determines the NAS timer value of the store-and-forward operation mode based on the first indication information, the first information or the preconfigured information; for example, when the core network device determines that it is a store-and-forward operation mode, it determines not to start the NAS timer or to set it to infinity.

[0220] In one implementation, the core network device obtains the first indication information or the first information, and sets the NAS timer according to the first indication information or the first information or the pre-configured information.

[0221] In one embodiment, the core network device obtains the first indication information or the first information including at least one of the following:

[0222] The NAS information of the terminal received by the core network device carries the first indication information;

[0223] The core network device receives an NG setup request from the RAN, where the NG setup request carries first indication information or first information;

[0224] The core network device receives first information from the NF.

[0225] In one implementation, the core network device sets the NAS timer according to the first indication information or the first information, including any one of the following:

[0226] Use the configured NAS timer for store-and-forward mode of operation;

[0227] Setting a NAS timer for a store-and-forward mode of operation according to a satellite operating period, including adding the satellite operating period to an existing NAS timer value when setting the NAS timer value;

[0228] The core network device sets a NAS timer based on the implementation, which is suitable for the store-and-forward operation mode;

[0229] Core network devices abandon the use of NAS timers in store-and-forward operation mode.

[0230] In an embodiment of the present application, in the store-and-forward operation mode, the core network device performs a second operation; wherein the second operation includes any one of the following: not starting the second NAS timer; setting the value of the second NAS timer based on the second time value; setting the second NAS timer based on the first information; sending the first information to the terminal; in this way, the core network device avoids using a general NAS timer in the store-and-forward operation mode, and specifically sets the NAS timer in the store-and-forward operation mode, which can reduce the probability of failure of the NAS process between the terminal and the core network device.

[0231] Optionally, the method further includes:

[0232] The core network device sends a third request message to the network function entity, where the third request message is used to request the first information;

[0233] The core network device receives the first information sent by the network function entity.

[0234] The third request message may be used to request information related to the store-and-forward operation mode. The network function entity may be a network function entity storing satellite information, and the network function entity may be an existing network element or a newly added network element. For example, the network function entity may be an AF.

[0235] In one implementation, the third request message may carry third indication information, where the third indication information is indication information of the store-and-forward operation mode; or, the third request message may carry an identifier of the store-and-forward operation mode.

[0236] In this embodiment, the core network device sends a third request message to the network function entity, and the core network device receives the first information sent by the network function entity. Thus, the core network device can obtain the first information through the third request message, and can then set a NAS timer in the store-and-forward operation mode based on the first information, or send the first information to the terminal.

[0237] Optionally, before setting the second NAS timer based on the first information, the method further includes at least one of the following:

[0238] The core network device receives the first information from the access network device;

[0239] The core network device obtains the pre-configured first information;

[0240] The core network device receives the first information from the terminal.

[0241] In one implementation, the core network device receives the first information sent by an access network device (such as a base station), and the first information may be included in an NGAP message.

[0242] In one embodiment, the core network device receives the first information from the terminal, and the first information is determined by the terminal. For example, the terminal may obtain the first information from an access network device (such as a base station) and send the first information to the core network device.

[0243] In this implementation, the core network device receives the first information from the access network device; or the core network device obtains the pre-configured first information; or the core network device receives the first information from the terminal; thereby, the core network device can set the NAS timer in the store-and-forward operation mode based on the obtained first information or send the first information to the terminal.

[0244] Optionally, before the core network device performs the second operation, the method further includes:

[0245] The core network device determines whether the terminal or the core network device is in the store-and-forward operation mode based on at least one of the following:

[0246] Preconfiguration information;

[0247] Second indication information received from the terminal, the second indication information being used to indicate that the terminal supports the store-and-forward operation mode;

[0248] Radio Access Technology (RAT) type information received from access network equipment.

[0249] Among them, the pre-configuration information can be used to indicate the scope of application of the store-and-forward operation mode, including but not limited to: geographical location or regional location, network information. The geographical location or regional location can be represented by geolocation, TAI or cell ID. The network information can be represented by PLMN ID or SNPN ID. The core network device can determine whether the geographical location or regional location or network information of the terminal is within the scope of application of the store-and-forward operation mode to determine whether the terminal or the core network device is in the store-and-forward operation mode. For example, the pre-configuration information can be used to indicate the cell ID of the cell to which the store-and-forward operation mode is applicable. When the cell ID of the cell to which the terminal belongs is within the cell ID of the cell to which the store-and-forward operation mode is applicable, the core network device determines that the terminal or the core network device is in the store-and-forward operation mode.

[0250] Optionally, the UE provides pre-configuration information to the underlying layer.

[0251] In one implementation, when the second indication information indicates that the terminal supports the store-and-forward operation mode, the core network device may determine that the terminal or the core network device is in the store-and-forward operation mode.

[0252] In one embodiment, when the RAT type information sent by the access network device indicates a single frequency (SF) radio access technology (RAT) type, the core network device determines that the terminal or the core network device is in the store-and-forward operation mode. SF RAT type refers to a store-and-forward RAT type.

[0253] In one embodiment, the second indication information is carried in at least one of the following items:

[0254] Mobility management capability information element; system update type information element; registration type information element; new addition information element.

[0255] In one implementation, the mobility management capability information element may be a 5GMM capability information element.

[0256] In one implementation, the system update type information element may be a 5GS update type information element.

[0257] In one implementation, the registration type information element may be a 5GS registration type information element.

[0258] In this embodiment, the core network device determines whether the terminal or the core network device is in the store-and-forward mode based on at least one of the following: pre-configuration information; second indication information received from the terminal, the second indication information being used to indicate that the terminal supports the store-and-forward mode; and radio access technology (RAT) type information received from the access network device. This allows the core network device to avoid using a general NAS timer in the store-and-forward mode and instead configure a specific NAS timer for the store-and-forward mode, thereby reducing the probability of NAS process failure between the terminal and the core network device.

[0259] Optionally, the preconfiguration information is used to indicate at least one of the following:

[0260] The location information corresponding to the store-and-forward operation mode; and the network information corresponding to the store-and-forward operation mode.

[0261] It should be noted that, for the pre-configuration information, please refer to the relevant description of the embodiment shown in FIG3 , and to avoid repeated description, it will not be repeated here.

[0262] Optionally, in the store-and-forward operation mode, before the core network device performs the second operation, the method further includes:

[0263] The core network device determines, based on the first indication information, whether the terminal or the core network device is in a store-and-forward operation mode;

[0264] The first indication information is used to indicate at least one of the following:

[0265] whether the first cell supports a store-and-forward mode of operation;

[0266] one or more cells in a store-and-forward mode of operation;

[0267] whether the cell where the terminal is located is in a store-and-forward operation mode;

[0268] Whether the cell where the terminal is located supports a store-and-forward operation mode;

[0269] whether the terminal is in a store-and-forward mode of operation;

[0270] whether the terminal supports a store-and-forward mode of operation;

[0271] Whether the store-and-forward mode of operation is available.

[0272] The core network device may obtain the first indication information from the access network device (eg, a base station), and the first indication information may be included in an NG Application Protocol (NGAP) message. NG refers to new generation.

[0273] In one embodiment, when the first indication information indicates at least one of the following, the core network device determines that the terminal or the core network device is in a store-and-forward operation mode:

[0274] The cell where the terminal is located is in a store-and-forward operation mode;

[0275] The cell where the terminal is located supports a store-and-forward operation mode;

[0276] The terminal is in a store-and-forward mode of operation;

[0277] The terminal supports a store-and-forward mode of operation.

[0278] In this implementation, the core network device determines whether the terminal or the core network device is in the store-and-forward operation mode based on the first indication information, thereby being able to perform specific settings on the NAS timer in the store-and-forward operation mode, thereby being able to reduce the probability of failure of the NAS process between the terminal and the core network device.

[0279] Optionally, the method further includes:

[0280] The core network device receives a first request message sent by the terminal;

[0281] The core network device sends a first response message to the terminal;

[0282] Wherein, in the case where the first response message indicates that the core network device accepts the first request message, the first response message includes at least one of the following: the first indication information; the first information;

[0283] In the case where the first response message indicates that the core network device rejects the first request message, the first response message includes at least one of the following: the first indication information; the first information; first rejection information;

[0284] The first rejection information is used to indicate the reason for rejecting the first request message.

[0285] It should be noted that, for the first request message and the first response message, please refer to the relevant description of the embodiment shown in Figure 3. To avoid repetition, they will not be repeated here.

[0286] Optionally, the first information includes at least one of the following:

[0287] Ephemeris information; satellite cycle; store-and-forward operation processing time; service link establishment delay; feedback link establishment delay.

[0288] Optionally, the setting of the second NAS timer based on the first information includes at least one of the following:

[0289] Setting a value of a second NAS timer based on the ephemeris information or the satellite cycle;

[0290] setting a value of a second NAS timer based on a value of a fourth NAS timer and the store-and-forward operation processing time;

[0291] Setting a value of a second NAS timer based on a value of a fourth NAS timer and a delay in establishing the service link;

[0292] Setting a value of a second NAS timer based on a value of a fourth NAS timer and a delay in establishing the feedback link;

[0293] The fourth NAS timer and the second NAS timer are different NAS timers.

[0294] The fourth NAS timer may be an existing NAS timer. The fourth NAS timer may include a mobility management timer and a session management timer.

[0295] In one embodiment, setting the value of the second NAS timer based on the value of the fourth NAS timer and the store-and-forward operation processing time may include setting the value of the second NAS timer as the sum of the value of the fourth NAS timer and the value of the store-and-forward operation processing time; or setting the value of the second NAS timer to be greater than the sum of the value of the fourth NAS timer and the value of the store-and-forward operation processing time.

[0296] In one implementation, setting the value of the second NAS timer based on the value of the fourth NAS timer and the service link establishment delay may include: setting the sum of the value of the fourth NAS timer and the value of the service link establishment delay as the value of the second NAS timer; or setting the value of the second NAS timer to be greater than the sum of the value of the fourth NAS timer and the value of the service link establishment delay.

[0297] In one implementation, setting the value of the second NAS timer based on the value of the fourth NAS timer and the feedback link establishment delay may include: setting the sum of the value of the fourth NAS timer and the value of the feedback link establishment delay as the value of the second NAS timer; or setting the value of the second NAS timer to be greater than the sum of the value of the fourth NAS timer and the value of the feedback link establishment delay.

[0298] In this embodiment, the value of the second NAS timer is set based on the ephemeris information or the satellite period, thereby taking into account satellite-related information in setting the NAS timer in the store-and-forward operation mode. Alternatively, the value of the second NAS timer is set based on the value of the fourth NAS timer and the store-and-forward operation processing time. Alternatively, the value of the second NAS timer is set based on the value of the fourth NAS timer and the service link establishment delay. Alternatively, the value of the second NAS timer is set based on the value of the fourth NAS timer and the feedback link establishment delay. Thus, various delays caused by NAS messages being relayed through satellites can be taken into account, and the NAS timers in the store-and-forward operation mode can be specifically set, thereby reducing the probability of NAS process failure between the terminal and the core network device.

[0299] Optionally, setting the value of the second NAS timer based on the second time value includes any one of the following:

[0300] Setting the value of the second NAS timer to infinity;

[0301] Setting the value of the second NAS timer to a preconfigured timer value;

[0302] Setting the value of the second NAS timer to a timer value predefined by the protocol;

[0303] The sum of a fourth NAS timer value and a second time value is set as the value of the second NAS timer, the fourth NAS timer and the second NAS timer are different NAS timers, and the second time value is a preconfigured time value.

[0304] In this implementation, the value of the second NAS timer is set to an infinite value; or the value of the second NAS timer is set to a preconfigured timer value; or the value of the second NAS timer is set to a timer value predefined by the protocol; or the sum of the value of the fourth NAS timer and the second time value is set to the value of the second NAS timer. In this way, by specifically setting the NAS timer in the store-and-forward operation mode, the probability of failure of the NAS process between the terminal and the core network device can be reduced.

[0305] It should be noted that this embodiment is an implementation method of the core network device corresponding to the embodiment shown in Figure 3. Its specific implementation method can refer to the relevant description of the embodiment shown in Figure 3. To avoid repetition, this embodiment will not be repeated.

[0306] This embodiment of the present application further provides a NAS timer processing method, including:

[0307] The access network device sends first indication information to the terminal;

[0308] The first indication information is used to indicate at least one of the following:

[0309] whether the first cell supports a store-and-forward mode of operation;

[0310] one or more cells in a store-and-forward mode of operation;

[0311] whether the cell where the terminal is located is in a store-and-forward operation mode;

[0312] Whether the cell where the terminal is located supports a store-and-forward operation mode;

[0313] whether the terminal is in a store-and-forward mode of operation;

[0314] whether the terminal supports a store-and-forward mode of operation;

[0315] Whether the store-and-forward mode of operation is available.

[0316] It should be noted that this embodiment is an implementation method of the access network device corresponding to the embodiment shown in Figure 3 or Figure 4. Its specific implementation method can refer to the relevant description of the embodiment shown in Figure 3 or Figure 4. To avoid repetition, this embodiment will not be repeated.

[0317] The following describes the NAS timer processing method provided in the embodiment of the present application through several specific examples:

[0318] In the following embodiments, a core network device is taken as an MME as an example for description.

[0319] Example 1:

[0320] In this embodiment, the terminal (UE) sets a NAS timer (ie, a first NAS timer) of the S&F operation mode (ie, the store-and-forward operation mode).

[0321] In this embodiment, the NAS timer refers to the NAS timer maintained on the UE side, including the existing and future mobility management NAS timer and session management NAS timer, and includes the NAS timer in the Evolved Packet System (EPS) and 5GS.

[0322] Implementation method one:

[0323] In this embodiment, as shown in FIG5 , the UE uses a pre-configured NAS timer value dedicated to the S&F operation mode, including the following process:

[0324] (1) The UE obtains first indication information from the base station, where the first indication information is used to indicate that the UE is in or supports an S&F operation mode, or that the cell is in or supports an S&F operation mode. The first indication information may be an S&F operation mode indication.

[0325] The first indication information is included in a broadcast message or an RRC message. For example, the broadcast message may be SIB31 (System Information Block Type 31) or SIB32; the RRC message may be an RRC connection reconfiguration message or an RRC connection establishment message.

[0326] If the UE is able to obtain the first indication information from the base station, steps (2) to (3) may be skipped and step (4) may be directly executed.

[0327] The UE may obtain the first indication information from the bottom layer.

[0328] (2) The UE sends a first message to the MME, where the first message includes at least one of the following: a registration request message, an attach request message, a tracking area update request message, a service request message, or a deregistration request message.

[0329] Optionally, the first message includes a first bit (i.e., second indication information), where the first bit is used to indicate whether the UE supports the S&F operation mode. The first bit may be included in a 5GMM capability information element, a 5GS update type information element, a 5GS registration type information element, or a newly added information element.

[0330] (3) The UE learns from the MME that it is in S&F operation mode, which includes the following three situations:

[0331] In the first scenario, the MME sends a first rejection message to the UE. The rejection message includes at least one of the following: first indication information, first information, and a first rejection value (i.e., first rejection information). The first rejection value indicates that only the S&F operation mode can be used. In this scenario, when the UE sends the first message, the S&F operation mode is already in use, and the first message may be a communication message between the UE and a visited network.

[0332] The first information may be store-and-forward operation auxiliary information, and the first information includes at least one of the following: ephemeris information, satellite cycle, S&F operation processing time, service link establishment delay, and feedback link establishment delay. The ephemeris information can be used to determine the satellite coverage time at a specific location.

[0333] In the second scenario, the MME sends a first message acceptance message to the UE, where the acceptance message includes at least one of the following: first indication information and first information. In this scenario, when the UE sends the first message, the S&F operation mode is not yet in use, and the first message may be a communication message between the UE and the home network.

[0334] The third case: the UE does not receive a response message to the first message, that is, the NAS timer associated with the first message times out, and the first message includes the first bit, then the UE determines that it is in the S&F operation mode.

[0335] Optionally, the UE determines that it is in the S&F operation mode based on pre-configuration information, where the pre-configuration information indicates a scope of application of the S&F operation mode, including but not limited to: a geographic location or regional location, and network information. The geographic location or regional location can be represented by geolocation, TAI, or cell ID. The network information can be represented by a PLMN ID or SNPN ID.

[0336] (4) The UE sets the NAS timer according to the first indication information, including the following two methods:

[0337] Method 1: The UE determines that it is in the S&F operation mode according to the first indication information, and the UE uses a pre-configured NAS timer value dedicated to the S&F operation mode. Specifically, a mobility management timer or session management NAS timer for the S&F operation mode can be added to the protocol, for example:

[0338] Table 1: EPS session management timers

[0339] Method 2: The UE determines that it is in the S&F operation mode based on the first indication information, and the UE adds a first time value to an existing NAS timer as a NAS timer for the S&F operation mode. The first time value may be configured by the operator, pre-configured in a Universal Subscriber Identity Module (USIM) / Mobile Equipment (ME), or determined by UE implementation.

[0340] The UE obtains the first indication information from the bottom layer or the UE obtains the S&F operation mode indication from the bottom layer.

[0341] Implementation 2:

[0342] It should be noted that the embodiments of the present application can be applied to different network systems, such as the fourth generation mobile communication technology (4 th In the 4G (4th Generation Mobile Communication Technology) system (4G System, 4GS) and 5GS, the base stations and core network nodes are different in different network systems. In the 4GS, the base stations and core network nodes are eNB and MME, respectively, while in the 5GS, the base stations and core network nodes are gNB and AMF, respectively. In this embodiment, the core network node is described using MME as an example.

[0343] In this embodiment, as shown in FIG6 , the UE determines the NAS timer value of the S&F operation mode according to the first indication information and the first information received from the network side, including the following process:

[0344] (1) Optionally, the UE obtains the first indication information and the first information from the base station.

[0345] The first indication information may be used to indicate that the UE is in or supports the S&F operation mode, or the cell is in or supports the S&F operation mode;

[0346] The first information may be store-and-forward operation auxiliary information, and the first information includes at least one of the following: ephemeris information, satellite cycle, S&F operation processing time, service link establishment delay, and feedback link establishment delay. The ephemeris information can be used to determine the satellite coverage time at a specific location.

[0347] The first indication information and the first information are included in a broadcast message or an RRC message. For example, the broadcast message may be SIB31 (System Information Block Type 31) or SIB32; the RRC message may be an RRC connection reconfiguration message or an RRC connection establishment message.

[0348] If the UE is able to obtain the first information from the base station, steps (2) to (5) may be skipped and step (6) may be directly executed.

[0349] The UE may obtain the first indication information and the first information from the bottom layer.

[0350] (2) The UE sends a first message to the MME, where the first message includes at least one of the following: a registration request message, an attach request message, a tracking area update request message, a service request message, or a deregistration request message.

[0351] Optionally, the first message includes a first bit, where the first bit is used to indicate whether the UE supports S&F operation mode. The first bit may be included in a 5GMM capability information element, a 5GS update type information element, or a newly added information element.

[0352] (3) Optionally, the MME requests S&F operation mode related information from the NF, and the request message carries an S&F operation mode indication.

[0353] The MME determines the S&F operation mode indication according to the first bit received from the UE or the network operation mode. The network operation mode may include a satellite-based non-terrestrial communication network or a terrestrial communication network.

[0354] The NF may be a network function entity storing satellite information, and the network function entity may be an existing network element or a newly added network element.

[0355] (4) Optionally, the NF determines the first information and sends it to the MME.

[0356] To determine the first information, the NF may obtain the ephemeris information from the RAN or a functional entity storing satellite information. For example, the functional entity may be a non-3GPP organization or a QAM.

[0357] (5) The MME sends the first indication information and the first information to the UE, including the following two situations:

[0358] In the first case, the MME sends a first rejection message to the UE, where the rejection message includes at least one of the following: first indication information, first information, and a first rejection value. The first rejection value is used to indicate that only the S&F operation mode can be executed.

[0359] In the second scenario, the MME sends a first message acceptance message to the UE, where the acceptance message includes at least one of the following: first indication information and first information. In this scenario, the UE does not use the S&F operation mode when sending the first message, and the first message may be a communication message between the UE and the home network.

[0360] (6) The UE sets a NAS timer according to the first indication information and the first information, including:

[0361] The UE determines, according to the first indication information, that it is in the S&F operation mode;

[0362] The UE setting a NAS timer according to the first information includes: the UE setting an appropriate NAS timer for the S&F operation mode according to the ephemeris information or the satellite period, or the UE adding the S&F operation processing time, the service link establishment delay, or the feedback link establishment delay to the existing NAS timer as the NAS timer for the S&F operation mode.

[0363] Implementation method three:

[0364] In this embodiment, when the UE determines that the operation mode is S&F, the UE determines not to start the NAS timer or sets it to infinity.

[0365] The UE determines, according to the first indication information (a method for obtaining the first indication information is the same as in embodiment 1 or embodiment 2) or pre-configuration information, that it is in the S&F operation mode; and the UE does not use the NAS timer mechanism when performing the NAS procedure, including: the UE does not start the NAS timer when sending the NAS message, or the UE sets the NAS timer to a large value or an infinite value when sending the NAS message.

[0366] Example 2:

[0367] In this embodiment, the MME sets the NAS timer (ie, the second NAS timer) of the S&F operation mode.

[0368] The MME can determine that the UE is in S&F operation mode based on pre-configured information, or the SF RAT type notified by the RAN, or the S&F registration indication information of the UE, and the MME sets the NAS timer, including: determining the NAS timer based on the pre-configured satellite cycle (more suitable for the MME satellite scenario); or determining the NAS timer based on the satellite cycle provided by the RAN during the NG setup process.

[0369] Implementation method one:

[0370] In this embodiment, as shown in FIG7 , the MME uses a pre-configured NAS timer value dedicated to the S&F operation mode, including the following process:

[0371] (1) The MME obtains first indication information from a base station (such as a RAN), where the first indication information is used to indicate that the MME is in or supports the S&F operation mode or that the cell is in or supports the S&F operation mode;

[0372] The first indication information is included in an NGAP message.

[0373] If the MME is able to obtain the first indication information from the base station, steps (2) to (3) may be skipped and step (4) may be directly executed.

[0374] (2) The UE sends a first message to the MME, where the first message includes at least one of the following: a registration request message, an attach request message, a tracking area update request message, a service request message, or a deregistration request message.

[0375] Optionally, the first message includes a first bit, where the first bit is used to indicate whether the UE supports S&F operation mode. The first bit may be included in a 5GMM capability information element, a 5GS update type information element, a 5GS registration type information element, or a newly added information element.

[0376] (3) The MME determines that it is in S&F operation mode and sets the NAS timer, including the following three situations:

[0377] Case 1: The MME determines that it is in S&F operation mode based on at least one of the following: pre-configuration information, the first bit received from the UE, and the SF RAT type received from the base station;

[0378] The pre-configured information indicates the applicable scope of the S&F operation mode, including but not limited to: geographic location or regional location, and network information. The geographic location or regional location can be represented by geolocation, TAI, or cell ID. The network information can be represented by PLMN ID or SNPN ID.

[0379] Case 2: After determining that the system is in S&F operation mode, the MME sets a NAS timer in the following two ways:

[0380] Method 1: The MME uses a pre-configured NAS timer value dedicated to the S&F operation mode. Specifically, mobility management timers or session management NAS timer for S&F operation mode can be added to the protocol.

[0381] Method 2: The MME adds a second time value to the existing NAS timer as the NAS timer for the S&F operation mode. The second time value may be configured by the operator, pre-configured in the MME, or determined by the MME implementation.

[0382] Implementation 2:

[0383] In this embodiment, as shown in FIG8 , the MME determines the NAS timer value for the S&F operation mode according to the first indication information, the first information, or the pre-configured information; or the MME receives the satellite cycle provided by the RAN during the NG setup process and sets the NAS timer value; or the MME determines the NAS timer according to the pre-configured ephemeris cycle information, including the following process:

[0384] (1) Optionally, the MME obtains the first indication information and the first information from the base station.

[0385] The first indication information is used to indicate that the cell is in or supports the S&F operation mode, or that the cell is in or supports the S&F operation mode;

[0386] The first information may be store-and-forward operation auxiliary information, and the first information includes at least one of the following: ephemeris information, satellite cycle, S&F operation processing time, service link establishment delay, and feedback link establishment delay. The ephemeris information can be used to determine the satellite coverage time at a specific location.

[0387] The first indication information and the first information are included in an NGAP message.

[0388] (2) The UE sends a first message to the MME, where the first message includes at least one of the following: a registration request message, an attach request message, a tracking area update request message, a service request message, or a deregistration request message.

[0389] Optionally, the first message includes a first bit, where the first bit is used to indicate whether the UE supports S&F operation mode. The first bit may be included in a 5GMM capability information element, a 5GS update type information element, a 5GS registration type information element, or a newly added information element.

[0390] Optionally, the first message includes second information, where the second information is used to indicate storage and forwarding operation auxiliary information determined or preconfigured on the UE side.

[0391] (3) Optionally, the MME requests S&F operation mode related information from the NF, and the request message carries an S&F operation mode indication.

[0392] The MME determines the S&F operation mode indication according to the first bit received from the UE or the network operation mode. The network operation mode may include a satellite-based non-terrestrial communication network or a terrestrial communication network.

[0393] The NF may be a network function entity storing satellite information, and the network function entity may be an existing network element or a newly added network element.

[0394] (4) Optionally, the NF determines the first information and sends it to the MME;

[0395] To determine the first information, the NF may obtain the ephemeris information from the RAN or a functional entity storing satellite information. For example, the functional entity may be a non-3GPP organization or a QAM.

[0396] (5) The MME determines that it is in S&F operation mode and sets the NAS timer, including the following two cases:

[0397] Case 1: The MME determines that it is in the S&F operation mode according to first indication information or pre-configuration information; the first indication information may be received from a base station or pre-configured in the MME.

[0398] Case 2: The MME sets the NAS timer according to the received first information, the preconfigured first information, or the received second information, including: the MME sets an appropriate NAS timer for the S&F operation mode according to the ephemeris information or the satellite cycle, or the MME adds the S&F operation processing time, the service link establishment delay, or the feedback link establishment delay to the existing NAS timer as the NAS timer for the S&F operation mode.

[0399] In addition to the NAS timers maintained by the UE and MME, there are some other parameters that can be determined by the MME and sent to the UE. These parameters may also be affected by the S&F operation mode. The MME may set at least one of the following based on the received first information, the pre-configured first information, or the received second information: negotiated extended discontinuous reception (DRX) parameters, mobile initiated connection only (MICO) mode configuration, extended connected time (sent to the RAN), and some timers that need to be emphasized (such as T3324, the periodic registration update timer (T3512), mobile reachable timer and implicit de-registration timer).

[0400] (6) The MME sends the first indication information and the first information to the UE, including the following two situations:

[0401] In the first case, the MME sends a first rejection message to the UE, where the rejection message includes at least one of the following: first indication information, first information, and a first rejection value. The first rejection value is used to indicate that only the S&F operation mode can be executed.

[0402] In the second scenario, the MME sends a first message acceptance message to the UE, where the acceptance message includes at least one of the following: first indication information and first information. In this scenario, the UE does not use the S&F operation mode when sending the first message, and the first message may be a communication message between the UE and the home network.

[0403] Furthermore, the first indication information is included in a 5GS network feature support (network feature support) information element or a newly added information element.

[0404] Implementation 3:

[0405] In this embodiment, when the MME determines that the operation mode is the S&F operation mode, the MME determines not to start the NAS timer or sets it to infinity.

[0406] The MME determines, based on the first indication information (a method for obtaining the first indication information is the same as in implementation mode 1 or Implementation mode 2) or pre-configuration information, that the MME is in the S&F operation mode; and the MME does not use the NAS timer mechanism when executing the NAS procedure, including: the MME does not start the NAS timer when sending the NAS message, or the MME sets the NAS timer to a large value or an infinite value when sending the NAS message.

[0407] The above embodiments are applicable to both LTE and NR.

[0408] Through the embodiments of the present application, when the UE uses the S&F operation mode, normal sending and receiving of NAS signaling can be guaranteed.

[0409] The NAS timer processing method provided in the embodiment of the present application can be executed by a NAS timer processing device. In the embodiment of the present application, the NAS timer processing device performing the NAS timer processing method is used as an example to illustrate the NAS timer processing device provided in the embodiment of the present application.

[0410] Please refer to FIG. 9 , which is a structural diagram of a NAS timer processing device provided in an embodiment of the present application. A terminal includes the NAS timer processing device. As shown in FIG. 9 , the NAS timer processing device 300 includes:

[0411] An execution module 301 is configured to execute a first operation in a store-and-forward operation mode;

[0412] The first operation includes any one of the following:

[0413] Do not start the first non-access layer NAS timer;

[0414] setting a value of a first NAS timer based on a first time value, the first time value being a time value for the store-and-forward mode of operation;

[0415] A first NAS timer is set based on first information, where the first information is used to indicate store-and-forward operation assistance information.

[0416] Optionally, the device further comprises:

[0417] The first determining module is configured to determine whether the system is in the store-and-forward operation mode according to pre-configuration information.

[0418] Optionally, the preconfiguration information is used to indicate at least one of the following:

[0419] The location information corresponding to the store-and-forward operation mode; and the network information corresponding to the store-and-forward operation mode.

[0420] Optionally, the first determining module is specifically configured to perform at least one of the following:

[0421] determining whether the terminal is in the store-and-forward operation mode based on whether the location information of the terminal matches the location information corresponding to the store-and-forward operation mode;

[0422] Based on whether the selected network information matches the network information corresponding to the store-and-forward operation mode, it is determined whether the operation mode is in the store-and-forward operation mode.

[0423] Optionally, in the store-and-forward operation mode, before the terminal performs the first operation, the apparatus further includes:

[0424] A second determining module, configured to determine whether the operation mode is the store-and-forward mode based on the first indication information;

[0425] The first indication information is used to indicate at least one of the following:

[0426] whether the first cell supports a store-and-forward mode of operation;

[0427] one or more cells in a store-and-forward mode of operation;

[0428] whether the cell where the terminal is located is in a store-and-forward operation mode;

[0429] Whether the cell where the terminal is located supports a store-and-forward operation mode;

[0430] whether the terminal is in a store-and-forward mode of operation;

[0431] whether the terminal supports a store-and-forward mode of operation;

[0432] Whether the store-and-forward mode of operation is available.

[0433] Optionally, the device further comprises:

[0434] The first receiving module is used to receive the first indication information sent by the access network device.

[0435] Optionally, the device further comprises:

[0436] A first sending module, configured to send a first request message to a core network device;

[0437] A second receiving module is used to receive a first response message sent by the core network device;

[0438] Wherein, in the case where the first response message indicates that the core network device accepts the first request message, the first response message includes at least one of the following: the first indication information; the first information;

[0439] In the case where the first response message indicates that the core network device rejects the first request message, the first response message includes at least one of the following: the first indication information; the first information; first rejection information;

[0440] The first rejection information is used to indicate the reason for rejecting the first request message.

[0441] Optionally, the device further comprises:

[0442] A second sending module, configured to send a second request message to the core network device;

[0443] a third determining module, configured to determine that the terminal is in a store-and-forward operation mode if the terminal determines that the second response message corresponding to the second request message has not been received and the second request message includes second indication information;

[0444] The second indication information is used to indicate that the terminal supports the store-and-forward operation mode.

[0445] Optionally, the first information includes at least one of the following:

[0446] Ephemeris information; satellite cycle; store-and-forward operation processing time; service link establishment delay; feedback link establishment delay.

[0447] Optionally, the setting of the first NAS timer based on the first information includes at least one of the following:

[0448] Setting a value of a first NAS timer based on the ephemeris information or the satellite cycle;

[0449] setting a value of the first NAS timer based on a value of the third NAS timer and the store-and-forward operation processing time;

[0450] Setting a value of the first NAS timer based on a value of the third NAS timer and the service link establishment delay;

[0451] Setting a value of the first NAS timer based on a value of the third NAS timer and the feedback link establishment delay;

[0452] The third NAS timer and the first NAS timer are different NAS timers.

[0453] Optionally, setting the value of the first NAS timer based on the first time value includes any one of the following:

[0454] Setting the value of the first NAS timer to an infinite value;

[0455] Setting the value of the first NAS timer to a preconfigured timer value;

[0456] The value of the first NAS timer is set to a timer value predefined by the protocol.

[0457] Optionally, the device further comprises:

[0458] The third sending module is used to send the first information to the core network device.

[0459] The NAS timer processing device in the embodiments of the present application can be an electronic device, such as an electronic device with an operating system, or a component of an electronic device, such as an integrated circuit or chip. The electronic device can be a terminal or other device other than a terminal. For example, the terminal can include but is not limited to the types of terminal 11 listed above, and other devices can include servers, network attached storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0460] The NAS timer processing device provided in the embodiment of the present application can implement each process implemented in the method embodiment of Figure 3 and achieve the same technical effect. To avoid repetition, it will not be described here.

[0461] Please refer to FIG. 10 , which is a structural diagram of a NAS timer processing device provided in an embodiment of the present application. A core network device includes the NAS timer processing device. As shown in FIG. 10 , the NAS timer processing device 400 includes:

[0462] An execution module 401 is configured to execute a second operation in a store-and-forward operation mode;

[0463] The second operation includes any one of the following:

[0464] Do not start the second NAS timer;

[0465] setting a value of a second NAS timer based on the second time value;

[0466] setting a second NAS timer based on the first information;

[0467] Sending first information to the terminal;

[0468] The first information is used to indicate store-and-forward operation auxiliary information, and the second time value is a time value used for the store-and-forward operation mode.

[0469] Optionally, the device further comprises:

[0470] A sending module, configured to send a third request message to the network function entity, where the third request message is used to request the first information;

[0471] The first receiving module is configured to receive the first information sent by the network function entity.

[0472] Optionally, before setting the second NAS timer based on the first information, the apparatus further includes an acquisition module, configured to perform at least one of the following:

[0473] receiving the first information from the access network device;

[0474] Acquire the preconfigured first information;

[0475] The first information is received from a terminal.

[0476] Optionally, the device further comprises:

[0477] A first determining module is configured to determine whether the terminal or the core network device is in the store-and-forward operation mode based on at least one of the following:

[0478] Preconfiguration information;

[0479] Second indication information received from the terminal, the second indication information being used to indicate that the terminal supports the store-and-forward operation mode;

[0480] The radio access technology RAT type information received from the access network device.

[0481] Optionally, the preconfiguration information is used to indicate at least one of the following:

[0482] The location information corresponding to the store-and-forward operation mode; and the network information corresponding to the store-and-forward operation mode.

[0483] Optionally, in the store-and-forward operation mode, before the core network device performs the second operation, the apparatus further includes:

[0484] A second determining module is configured to determine whether the terminal or the core network device is in a store-and-forward operation mode based on the first indication information;

[0485] The first indication information is used to indicate at least one of the following:

[0486] whether the first cell supports a store-and-forward mode of operation;

[0487] one or more cells in a store-and-forward mode of operation;

[0488] whether the cell where the terminal is located is in a store-and-forward operation mode;

[0489] Whether the cell where the terminal is located supports a store-and-forward operation mode;

[0490] whether the terminal is in a store-and-forward mode of operation;

[0491] whether the terminal supports a store-and-forward mode of operation;

[0492] Whether the store-and-forward mode of operation is available.

[0493] Optionally, the device further comprises:

[0494] A receiving module, configured to receive a first request message sent by a terminal;

[0495] A sending module, configured to send a first response message to the terminal;

[0496] Wherein, in the case where the first response message indicates that the core network device accepts the first request message, the first response message includes at least one of the following: the first indication information; the first information;

[0497] In the case where the first response message indicates that the core network device rejects the first request message, the first response message includes at least one of the following: the first indication information; the first information; first rejection information;

[0498] The first rejection information is used to indicate the reason for rejecting the first request message.

[0499] Optionally, the first information includes at least one of the following:

[0500] Ephemeris information; satellite cycle; store-and-forward operation processing time; service link establishment delay; feedback link establishment delay.

[0501] Optionally, the setting of the second NAS timer based on the first information includes at least one of the following:

[0502] Setting a value of a second NAS timer based on the ephemeris information or the satellite cycle;

[0503] setting a value of a second NAS timer based on a value of a fourth NAS timer and the store-and-forward operation processing time;

[0504] Setting a value of a second NAS timer based on a value of a fourth NAS timer and a delay in establishing the service link;

[0505] Setting a value of a second NAS timer based on a value of a fourth NAS timer and a delay in establishing the feedback link;

[0506] The fourth NAS timer and the second NAS timer are different NAS timers.

[0507] Optionally, setting the value of the second NAS timer based on the second time value includes any one of the following:

[0508] Setting the value of the second NAS timer to infinity;

[0509] Setting the value of the second NAS timer to a preconfigured timer value;

[0510] Setting the value of the second NAS timer to a timer value predefined by the protocol;

[0511] The sum of a fourth NAS timer value and a second time value is set as the value of the second NAS timer, the fourth NAS timer and the second NAS timer are different NAS timers, and the second time value is a preconfigured time value.

[0512] The NAS timer processing device in the embodiments of the present application can be an electronic device, such as an electronic device with an operating system, or a component of an electronic device, such as an integrated circuit or chip. The electronic device can be a terminal or other device other than a terminal. For example, the terminal can include but is not limited to the types of terminal 11 listed above, and other devices can include servers, network attached storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0513] The NAS timer processing device provided in the embodiment of the present application can implement each process implemented in the method embodiment of Figure 4 and achieve the same technical effect. To avoid repetition, it will not be described here.

[0514] Optionally, as shown in Figure 11, an embodiment of the present application further provides a communication device 500, including a processor 501 and a memory 502, wherein the memory 502 stores a program or instruction that can be executed on the processor 501. For example, when the communication device 500 is a terminal, the program or instruction, when executed by the processor 501, implements the various steps of the embodiment of the NAS timer processing method applied to the terminal, and can achieve the same technical effect. To avoid repetition, it is not repeated here. When the communication device 500 is a network-side device, the program or instruction, when executed by the processor 501, implements the various steps of the embodiment of the NAS timer processing method applied to the network-side device, and can achieve the same technical effect. To avoid repetition, it is not repeated here.

[0515] The present application also provides a terminal including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps in the method embodiment shown in FIG3 . This terminal embodiment corresponds to the above-mentioned terminal-side method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment are applicable to this terminal embodiment and can achieve the same technical effects.

[0516] Specifically, FIG12 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of the present application.

[0517] The terminal 600 includes but is not limited to: a radio frequency unit 601, a network module 602, an audio output unit 603, an input unit 604, a sensor 605, a display unit 606, a user input unit 607, an interface unit 608, a memory 609 and at least some of the components of the processor 610.

[0518] Those skilled in the art will appreciate that the terminal 600 may also include a power supply (such as a battery) to power various components. The power supply may be logically connected to the processor 610 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The terminal structure shown in FIG12 does not limit the terminal. The terminal may include more or fewer components than shown, or may combine certain components, or have different component arrangements, which will not be described in detail here.

[0519] It should be understood that in an embodiment of the present application, the input unit 604 may include a graphics processing unit (GPU) 6041 and a microphone 6042, and the GPU 6041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 606 may include a display panel 6061, and the display panel 6061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 607 includes a touch panel 6071 and at least one of other input devices 6072. The touch panel 6071 is also called a touch screen. The touch panel 6071 may include two parts: a touch detection device and a touch controller. Other input devices 6072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and an operating stick, which will not be repeated here.

[0520] In the embodiment of the present application, after receiving downlink data from a network-side device, the radio frequency unit 601 may transmit the data to the processor 610 for processing. Furthermore, the radio frequency unit 601 may send uplink data to the network-side device. Typically, the radio frequency unit 601 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0521] The memory 609 can be used to store software programs or instructions and various data. The memory 609 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, applications or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 609 may include a volatile memory or a non-volatile memory, or the memory 609 may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM), and a direct memory bus random access memory (DRRAM). The memory 609 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0522] Processor 610 may include one or more processing units. Optionally, processor 610 integrates an application processor and a modem processor. The application processor primarily handles operations related to the operating system, user interface, and application programs, while the modem processor primarily processes wireless communication signals, such as a baseband processor. It is understood that the modem processor may not be integrated into processor 610.

[0523] The processor 610 is configured to:

[0524] In a store-and-forward operation mode, performing a first operation;

[0525] The first operation includes any one of the following:

[0526] Do not start the first non-access layer NAS timer;

[0527] setting a value of a first NAS timer based on a first time value, the first time value being a time value for the store-and-forward mode of operation;

[0528] A first NAS timer is set based on first information, where the first information is used to indicate store-and-forward operation assistance information.

[0529] Optionally, the processor 610 is further configured to:

[0530] Determine whether the operation mode is the store-and-forward mode according to preconfiguration information.

[0531] Optionally, the preconfiguration information is used to indicate at least one of the following:

[0532] The location information corresponding to the store-and-forward operation mode; and the network information corresponding to the store-and-forward operation mode.

[0533] Optionally, the processor 610 is specifically configured to perform at least one of the following:

[0534] determining whether the terminal is in the store-and-forward operation mode based on whether the location information of the terminal matches the location information corresponding to the store-and-forward operation mode;

[0535] Based on whether the selected network information matches the network information corresponding to the store-and-forward operation mode, it is determined whether the operation mode is in the store-and-forward operation mode.

[0536] Optionally, in the store-and-forward operation mode, the processor 610 is further configured to:

[0537] determining whether the operation mode is the store-and-forward mode based on the first indication information;

[0538] The first indication information is used to indicate at least one of the following:

[0539] whether the first cell supports a store-and-forward mode of operation;

[0540] one or more cells in a store-and-forward mode of operation;

[0541] whether the cell where the terminal is located is in a store-and-forward operation mode;

[0542] Whether the cell where the terminal is located supports a store-and-forward operation mode;

[0543] whether the terminal is in a store-and-forward mode of operation;

[0544] whether the terminal supports a store-and-forward mode of operation;

[0545] Whether the store-and-forward mode of operation is available.

[0546] Optionally, the radio frequency unit 601 is configured to:

[0547] Receive the first indication information sent by the access network device.

[0548] Optionally, the radio frequency unit 601 is configured to:

[0549] Sending a first request message to a core network device;

[0550] Receiving a first response message sent by the core network device;

[0551] Wherein, in the case where the first response message indicates that the core network device accepts the first request message, the first response message includes at least one of the following: the first indication information; the first information;

[0552] In the case where the first response message indicates that the core network device rejects the first request message, the first response message includes at least one of the following: the first indication information; the first information; first rejection information;

[0553] The first rejection information is used to indicate the reason for rejecting the first request message.

[0554] Optionally, the radio frequency unit 601 is configured to: send a second request message to the core network device;

[0555] The processor 610 is further configured to: determine that the terminal is in a store-and-forward operation mode when the terminal determines that the second response message corresponding to the second request message is not received and the second request message includes second indication information;

[0556] The second indication information is used to indicate that the terminal supports the store-and-forward operation mode.

[0557] Optionally, the first information includes at least one of the following:

[0558] Ephemeris information; satellite cycle; store-and-forward operation processing time; service link establishment delay; feedback link establishment delay.

[0559] Optionally, the setting of the first NAS timer based on the first information includes at least one of the following:

[0560] Setting a value of a first NAS timer based on the ephemeris information or the satellite cycle;

[0561] setting a value of the first NAS timer based on a value of the third NAS timer and the store-and-forward operation processing time;

[0562] Setting a value of the first NAS timer based on a value of the third NAS timer and the service link establishment delay;

[0563] Setting a value of the first NAS timer based on a value of the third NAS timer and the feedback link establishment delay;

[0564] The third NAS timer and the first NAS timer are different NAS timers.

[0565] Optionally, setting the value of the first NAS timer based on the first time value includes any one of the following:

[0566] Setting the value of the first NAS timer to an infinite value;

[0567] Setting the value of the first NAS timer to a preconfigured timer value;

[0568] The value of the first NAS timer is set to a timer value predefined by the protocol.

[0569] Optionally, the radio frequency unit 601 is used to: send the first information to a core network device.

[0570] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the method embodiment Figure 3, and achieve the same or corresponding technical effects. To avoid repetition, it will not be repeated here.

[0571] Specifically, the terminal of the embodiment of the present application also includes: instructions or programs stored in the memory 609 and can be run on the processor 610. The processor 610 calls the instructions or programs in the memory 609 to execute the methods executed by each module shown in Figure 4 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0572] An embodiment of the present application further provides a network-side device, which is a core network device and includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps of the method embodiment shown in FIG3 . This network-side device embodiment corresponds to the aforementioned NAS timer processing method embodiment applied to the core network device, and each implementation process and implementation method of the aforementioned method embodiment are applicable to this network-side device embodiment and can achieve the same technical effects.

[0573] Specifically, an embodiment of the present application further provides a network-side device. The network-side device is a core network device. As shown in Figure 13, the network-side device 700 includes: an antenna 701, a radio frequency device 702, a baseband device 703, a processor 704, and a memory 705. The antenna 701 is connected to the radio frequency device 702. In the uplink direction, the radio frequency device 702 receives information via the antenna 701 and sends the received information to the baseband device 703 for processing. In the downlink direction, the baseband device 703 processes the information to be transmitted and sends it to the radio frequency device 702. The radio frequency device 702 processes the received information and then sends it through the antenna 701.

[0574] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 703 , which includes a baseband processor.

[0575] The baseband device 703 may include, for example, at least one baseband board, on which multiple chips are arranged, as shown in Figure 13, one of which is, for example, a baseband processor, which is connected to the memory 705 through a bus interface to call the program in the memory 705 and execute the network device operations shown in the above method embodiment.

[0576] The network side device may further include a network interface 706 , which is, for example, a Common Public Radio Interface (CPRI).

[0577] Specifically, the network side device 700 of the embodiment of the present application also includes: instructions or programs stored in the memory 705 and can be run on the processor 704. The processor 704 calls the instructions or programs in the memory 705 to execute the method of execution of each module shown in Figure 5 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0578] The present application also provides a readable storage medium having a program or instruction stored thereon. When executed by a processor, the program or instruction implements the various processes of the above-described NAS timer processing method embodiment and can achieve the same technical effects. To avoid repetition, these processes are not described here.

[0579] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0580] An embodiment of the present application further provides a chip including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the various processes of the aforementioned NAS timer processing method embodiment, thereby achieving the same technical effects. To avoid repetition, these processes are not further described herein.

[0581] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0582] The present application also provides a computer program / program product, which is stored in a storage medium and executed by at least one processor to implement the various processes of the aforementioned NAS timer processing method embodiment, achieving the same technical effects. To avoid repetition, these processes are not described here.

[0583] An embodiment of the present application further provides a NAS timer processing system, including: a terminal and a network-side device, wherein the terminal can be configured to execute the steps of the NAS timer processing method applied to the terminal as described above, and the network-side device can be configured to execute the steps of the NAS timer processing method applied to the network-side device as described above.

[0584] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0585] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general hardware platform, or of course, by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes a number of instructions for causing a terminal or network-side device to execute the methods described in each embodiment of the present application.

[0586] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of this application and the scope of protection of the claims. These implementation methods are all within the protection of this application.

Claims

1. A method for processing a NAS timer, comprising: In the store-and-forward operation mode, the terminal performs a first operation; Wherein, the first operation includes any one of the following: Do not start the first non-access stratum (NAS) timer; Set the value of the first NAS timer based on a first time value, where the first time value is a time value for the store-and-forward operation mode; Set the first NAS timer based on first information, where the first information is used to indicate store-and-forward operation assistance information.

2. The method according to claim 1, wherein Before the terminal performs the first operation, the method further includes: The terminal determines whether it is in the store-and-forward operation mode according to pre-configured information.

3. The method according to claim 2, wherein, The pre-configured information is used to indicate at least one of the following: Location information corresponding to the store-and-forward operation mode; Network information corresponding to the store-and-forward operation mode.

4. The method according to claim 2 or 3, wherein, The terminal determines whether it is in the store-and-forward operation mode according to the pre-configured information, including at least one of the following: The terminal determines whether it is in the store-and-forward operation mode based on whether the location information of the terminal matches the location information corresponding to the store-and-forward operation mode; The terminal determines whether it is in the store-and-forward operation mode based on whether the selected network information matches the network information corresponding to the store-and-forward operation mode.

5. The method according to claim 1, wherein Before the terminal performs the first operation, the method further includes: The terminal determines whether it is in the store-and-forward operation mode based on first indication information; The first indication information is used to indicate at least one of the following: Whether the first cell supports the store-and-forward operation mode; One or more cells in the store-and-forward operation mode; Whether the cell where the terminal is located is in the store-and-forward operation mode; Whether the cell where the terminal is located supports the store-and-forward operation mode; Whether the terminal is in the store-and-forward operation mode; Whether the terminal supports the store-and-forward operation mode; Whether the store-and-forward operation mode is available.

6. The method according to claim 5, wherein, Before the terminal determines whether it is in the store-and-forward operation mode based on the first indication information, the method further includes: The terminal receives the first indication information sent by the access network device.

7. According to the method described in any one of claims 1 to 6, the method further includes: The terminal sends a first request message to the core network device; The terminal receives a first response message sent by the core network device; Wherein, when the first response message indicates that the core network device accepts the first request message, the first response message includes at least one of the following: the first indication information; the first information; When the first response message indicates that the core network device rejects the first request message, the first response message includes at least one of the following: the first indication information; the first information; first rejection information; Wherein, the first rejection information is used to indicate the reason for rejecting the first request message.

8. According to the method described in any one of claims 1-7, the method further includes: The terminal sends a second request message to the core network device; When the terminal determines that it has not received a second response message corresponding to the second request message, and the second request message includes second indication information, the terminal determines that it is in the store-and-forward operation mode; wherein, the second indication information is used to indicate that the terminal supports the store-and-forward operation mode.

9. The method according to any one of claims 1-8, wherein The first information includes at least one of the following: Ephemeris information; satellite period; store-and-forward operation processing time; service link establishment delay; feedback link establishment delay.

10. The method according to claim 9, wherein The setting of the first NAS timer based on the first information includes at least one of the following: Setting the value of the first NAS timer based on the ephemeris information or the satellite period; Setting the value of the first NAS timer based on the value of the third NAS timer and the store-and-forward operation processing time; Setting the value of the first NAS timer based on the value of the third NAS timer and the service link establishment delay; Setting the value of the first NAS timer based on the value of the third NAS timer and the feedback link establishment delay; wherein, the third NAS timer and the first NAS timer are different NAS timers.

11. According to the method according to any one of claims 1-10, wherein The setting of the value of the first NAS timer based on the first time value includes any one of the following: Setting the value of the first NAS timer to an infinite value; Setting the value of the first NAS timer to a pre-configured timer value; Setting the value of the first NAS timer to a protocol-predefined timer value.

12. The method according to any one of claims 1-11, the method further includes: The terminal sends the first information to the core network device.

13. A method for processing a NAS timer, including: In the store-and-forward operation mode, the core network device performs a second operation; wherein, the second operation includes any one of the following: Not starting a second NAS timer; Setting the value of the second NAS timer based on a second time value; Setting the second NAS timer based on the first information; Sending the first information to the terminal; wherein, the first information is used to indicate store-and-forward operation assistance information, and the second time value is a time value for the store-and-forward operation mode.

14. The method according to claim 13, the method further includes: The core network device sends a third request message to the network function entity, and the third request message is used to request the first information; The core network device receives the first information sent by the network function entity.

15. The method according to claim 13, wherein, Before setting the second NAS timer based on the first information, the method further includes at least one of the following: The core network device receives the first information from the access network device; The core network device obtains the pre-configured first information; The core network device receives the first information from the terminal.

16. The method according to any one of claims 13 - 15, wherein, Before the core network device performs the second operation, the method further includes: The core network device determines whether the terminal or the core network device is in the store-and-forward operation mode based on at least one of the following: Pre-configured information; Received second indication information from the terminal, and the second indication information is used to indicate that the terminal supports the store-and-forward operation mode; Wireless access technology (RAT) type information received from an access network device.

17. The method according to claim 16, wherein, The pre-configured information is used to indicate at least one of the following: Location information corresponding to the store-and-forward operation mode; network information corresponding to the store-and-forward operation mode.

18. The method according to claim 13, wherein, Before the core network device performs a second operation in the store-and-forward operation mode, the method further includes: The core network device determines whether the terminal or the core network device is in the store-and-forward operation mode based on first indication information; The first indication information is used to indicate at least one of the following: Whether a first cell supports the store-and-forward operation mode; One or more cells in the store-and-forward operation mode; Whether the cell where the terminal is located is in the store-and-forward operation mode; Whether the cell where the terminal is located supports the store-and-forward operation mode; Whether the terminal is in the store-and-forward operation mode; Whether the terminal supports the store-and-forward operation mode; Whether the store-and-forward operation mode is available.

19. The method according to claim 18, the method further includes: The core network device receives a first request message sent by the terminal; The core network device sends a first response message to the terminal; Wherein, when the first response message indicates that the core network device accepts the first request message, the first response message includes at least one of the following: the first indication information; the first information; When the first response message indicates that the core network device rejects the first request message, the first response message includes at least one of the following: the first indication information; the first information; first rejection information; Wherein, the first rejection information is used to indicate the reason for rejecting the first request message.

20. The method according to any one of claims 13-19, wherein The first information includes at least one of the following: Ephemeris information; satellite cycle; store-and-forward operation processing time; service link establishment delay; feedback link establishment delay.

21. The method according to claim 20, wherein Setting the second NAS timer based on the first information includes at least one of the following: Setting the value of the second NAS timer based on the ephemeris information or the satellite cycle; Setting the value of the second NAS timer based on the value of the fourth NAS timer and the store-and-forward operation processing time; Setting the value of the second NAS timer based on the value of the fourth NAS timer and the service link establishment delay; Setting the value of the second NAS timer based on the value of the fourth NAS timer and the feedback link establishment delay; Wherein, the fourth NAS timer and the second NAS timer are different NAS timers.

22. The method according to any one of claims 13 - 21, wherein, Setting the value of the second NAS timer based on the second time value includes any one of the following: Setting the value of the second NAS timer to an infinite value; Setting the value of the second NAS timer to a pre-configured timer value; Setting the value of the second NAS timer to a protocol-predefined timer value; Setting the sum of the value of the fourth NAS timer and the second time value as the value of the second NAS timer, the fourth NAS timer and the second NAS timer are different NAS timers, and the second time value is a pre-configured time value.

23. A NAS timer processing device, wherein, The terminal includes the NAS timer processing device, including: An execution module, configured to perform a first operation in a store-and-forward operation mode; Wherein, the first operation includes any one of the following: Not start a first non-access stratum (NAS) timer; Set the value of the first NAS timer based on a first time value, where the first time value is a time value for the store-and-forward operation mode; Set the first NAS timer based on first information, where the first information is used to indicate store-and-forward operation assistance information.

24. The apparatus according to claim 23, the apparatus further comprising: A first determination module, configured to determine whether it is in the store-and-forward operation mode according to pre-configured information.

25. The apparatus according to claim 24, wherein, The pre-configured information is used to indicate at least one of the following: Location information corresponding to the store-and-forward operation mode; Network information corresponding to the store-and-forward operation mode.

26. The apparatus according to claim 23, the apparatus further comprising: A second determination module, configured to determine whether it is in the store-and-forward operation mode based on first indication information; The first indication information is used to indicate at least one of the following: Whether a first cell supports the store-and-forward operation mode; One or more cells in the store-and-forward operation mode; Whether the cell where the terminal is located is in the store-and-forward operation mode; Whether the cell where the terminal is located supports the store-and-forward operation mode; Whether the terminal is in the store-and-forward operation mode; Whether the terminal supports the store-and-forward operation mode; Whether the store-and-forward operation mode is available.

27. The apparatus according to any one of claims 23-26, the apparatus further comprising: A first sending module, configured to send a first request message to a core network device; A receiving module, configured to receive a first response message sent by the core network device; Wherein, when the first response message indicates that the core network device accepts the first request message, the first response message includes at least one of the following: the first indication information; the first information; When the first response message indicates that the core network device rejects the first request message, the first response message includes at least one of the following: the first indication information; the first information; first rejection information; Wherein, the first rejection information is used to indicate the reason for rejecting the first request message.

28. A NAS timer processing apparatus, the core network device includes the NAS timer processing apparatus, comprising: An execution module, configured to perform a second operation in a store-and-forward operation mode; Wherein, the second operation includes any one of the following: Not start a second NAS timer; Set the value of the second NAS timer based on a second time value; Set the second NAS timer based on the first information; Send the first information to the terminal; Wherein, the first information is used to indicate store-and-forward operation assistance information, and the second time value is a time value for the store-and-forward operation mode.

29. A terminal, comprising a processor and a memory, the memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, the steps of the NAS timer processing method according to any one of claims 1-12 are implemented.

30. A network-side device, comprising a processor and a memory, where the memory stores programs or instructions that can run on the processor, and when the programs or instructions are executed by the processor, the steps of the NAS timer processing method according to any one of claims 13-22 are implemented.

31. A chip, the chip comprising a processor and a communication interface, the communication interface being coupled to the processor, and the processor being configured to run programs or instructions to implement the steps of the NAS timer processing method according to any one of claims 1-12, or to implement the steps of the NAS timer processing method according to any one of claims 13-22.

32. A readable storage medium, where programs or instructions are stored on the readable storage medium, and when the programs or instructions are executed by a processor, the steps of the NAS timer processing method according to any one of claims 1-12 are implemented, or the steps of the NAS timer processing method according to any one of claims 13-22 are implemented.

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