Cell selection method and device, equipment and storage medium

Abstract

The invention discloses a cell selection method and device, equipment and a storage medium, and belongs to the technical field of communication, and the cell selection method comprises the steps that a terminal obtains first information of a first cell; the terminal executes a first operation based on the first information; wherein the first operation is an operation related to cell selection or cell reselection; the first information is used for indicating at least one of the following items: a satellite operation mode of the cell; the connection time of the satellite and the ground gateway; the time for the cell to stop service; the time for the cell to store data; the amount of data storable by the cell; the first threshold value is related to the maximum first data volume of a cell which can be selected or reselected by the terminal; the second threshold value is related to the minimum first data volume of a cell capable of being selected or reselected by the terminal; a service type supported by the cell; forwarding priorities of service types supported by the cell; wherein the first data volume comprises at least one of the following items: the data volume available for the terminal; and the terminal receives the to-be-sent data volume.

Description

Technical Field

[0001] This application belongs to the field of communication technologies, and particularly relates to a cell selection method, apparatus, device, and storage medium. Background Art

[0002] A non-terrestrial network (NTN) refers to a network or network segment that uses a satellite or unmanned aircraft system (UAS) platform for transmission. Compared with a terrestrial communication system, a satellite-based non-terrestrial communication system has a wider coverage area. Typical scenarios where it is applicable include situations where it is impossible to build terrestrial base stations or terrestrial base stations are damaged, such as continuous coverage in remote mountainous areas, deserts, oceans, forests, or emergency communication when terrestrial base stations are damaged due to natural disasters.

[0003] In the "normal or default satellite operation" mode, signaling and data exchange between a terminal accessing a satellite and a remote terrestrial network require both the service link and the feeder link to be activated simultaneously. In this way, when the terminal interacts with the satellite through the service link, there is a continuous end-to-end connection path between the terminal, the satellite, and the terrestrial network. In the "store and forward satellite operation" mode, the end-to-end exchange of signaling or data is processed by combining two steps that are not synchronized in time. One step is the signaling or data exchange between the terminal and the satellite. At the same time, the satellite operates the service link without a connection to the terrestrial network (i.e., the satellite can operate the service link without an active feedback link connection). The other step is to establish a connection between the satellite and the terrestrial network so that communication can occur between the satellite and the terrestrial network. Therefore, the satellite switches from being connected to the terminal in one step to being connected to the terrestrial network in the other step.

[0004] However, in the case where a cell supporting the normal satellite operation mode coexists with a cell supporting the store and forward satellite operation mode, there is currently no solution for how a terminal performs cell selection and reselection, and thus the communication reliability of the terminal cannot be guaranteed. Summary of the Invention

[0005] Embodiments of this application provide a cell selection method, apparatus, device, and storage medium, which can solve the problem of how to perform cell selection and reselection to ensure the communication reliability of a terminal.

[0006] In a first aspect, a cell selection method is provided. The method includes: a terminal obtains first information of a first cell; the terminal performs a first operation based on the first information; wherein, the first operation is an operation related to cell selection or cell reselection; the first information is used to indicate at least one of the following: the satellite operation mode of the cell; the time when the satellite is connected to the ground gateway; the time when the cell stops serving; the time when the cell stores data; the data volume that the cell can store; a first threshold, the first threshold is related to the maximum first data volume of the cells that the terminal can select or reselect; a second threshold, the second threshold is related to the minimum first data volume of the cells that the terminal can select or reselect; the service types supported by the cell; the forwarding priorities of the service types supported by the cell; wherein, the first data volume includes at least one of the following: the data volume available to the terminal; the data volume to be sent by the terminal.

[0007] In a second aspect, a cell selection apparatus is provided. The apparatus includes: an obtaining module and an executing module. The obtaining module is configured to obtain first information of a first cell. The executing module is configured to perform a first operation based on the first information obtained by the obtaining module. Wherein, the first operation is an operation related to cell selection or cell reselection; the first information is used to indicate at least one of the following: the satellite operation mode of the cell; the time when the satellite is connected to the ground gateway; the time when the cell stops serving; the time when the cell stores data; the data volume that the cell can store; a first threshold, the first threshold is related to the maximum first data volume of the cells that the terminal can select or reselect; a second threshold, the second threshold is related to the minimum first data volume of the cells that the terminal can select or reselect; the service types supported by the cell; the forwarding priorities of the service types supported by the cell; wherein, the first data volume includes at least one of the following: the data volume available to the terminal; the data volume to be sent by the terminal.

[0008] In a third aspect, a cell selection method is provided. The method includes: a network-side device sends first information of a first cell to a terminal, the first information is used to perform a first operation, the first operation is an operation related to cell selection or cell reselection; the first information is used to indicate at least one of the following: the satellite operation mode of the cell; the time when the satellite is connected to the ground gateway; the time when the cell stops serving; the time when the cell stores data; the data volume that the cell can store; a first threshold, the first threshold is related to the maximum first data volume of the cells that the terminal can select or reselect; a second threshold, the second threshold is related to the minimum first data volume of the cells that the terminal can select or reselect; the service types supported by the cell; the forwarding priorities of the service types supported by the cell; wherein, the first data volume includes at least one of the following: the data volume available to the terminal; the data volume to be sent by the terminal.

[0009] Fourth aspect, a cell selection apparatus is provided, the apparatus comprising: a sending module. The sending module is configured to send first information of a first cell to a terminal, where the first information is used to perform a first operation, and the first operation is an operation related to cell selection or cell reselection; the first information is used to indicate at least one of the following: the satellite operation mode of the cell; the time when the satellite is connected to the terrestrial gateway; the time when the cell stops service; the time when the cell stores data; the amount of data that the cell can store; a first threshold, where the first threshold is related to the maximum first data amount of the cells that the terminal can select or reselect; a second threshold, where the second threshold is related to the minimum first data amount of the cells that the terminal can select or reselect; the service types supported by the cell; the forwarding priorities of the service types supported by the cell; where the first data amount includes at least one of the following: the data amount available to the terminal; the data amount to be sent by the terminal.

[0010] Fifth aspect, a terminal is provided, the terminal comprising a processor and a memory, where the memory stores a program or instructions that can run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the first aspect are implemented.

[0011] Sixth aspect, a terminal is provided, comprising a processor and a communication interface, where the communication interface is configured to obtain first information of a first cell. The processor is configured to perform a first operation based on the first information. Where the first operation is an operation related to cell selection or cell reselection; the first information is used to indicate at least one of the following: the satellite operation mode of the cell; the time when the satellite is connected to the terrestrial gateway; the time when the cell stops service; the time when the cell stores data; the amount of data that the cell can store; a first threshold, where the first threshold is related to the maximum first data amount of the cells that the terminal can select or reselect; a second threshold, where the second threshold is related to the minimum first data amount of the cells that the terminal can select or reselect; the service types supported by the cell; the forwarding priorities of the service types supported by the cell; where the first data amount includes at least one of the following: the data amount available to the terminal; the data amount to be sent by the terminal.

[0012] Seventh aspect, a network-side device is provided, the network-side device comprising a processor and a memory, where the memory stores a program or instructions that can run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the third aspect are implemented.

[0013] In an eighth aspect, a network-side device is provided, including a processor and a communication interface. The communication interface is configured to send first information of a first cell to a terminal, where the first information is used to perform a first operation, and the first operation is an operation related to cell selection or cell reselection. The first information is used to indicate at least one of the following: the satellite operation mode of the cell; the time when the satellite is connected to the terrestrial gateway; the time when the cell stops service; the time when the cell stores data; the amount of data that the cell can store; a first threshold, where the first threshold is related to the maximum first data amount of the cells that the terminal can select or reselect; a second threshold, where the second threshold is related to the minimum first data amount of the cells that the terminal can select or reselect; the service types supported by the cell; the forwarding priority of the service types supported by the cell; where the first data amount includes at least one of the following: the amount of data available to the terminal; the amount of data to be sent by the terminal.

[0014] In a ninth aspect, a readable storage medium is provided. A program or instructions are stored on the readable storage medium, and when the program or instructions are executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the third aspect are implemented.

[0015] In a tenth aspect, a chip is provided. The chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to run a program or instructions to implement the method described in the first aspect, or to implement the method described in the third aspect.

[0016] In an eleventh aspect, a computer program / program product is provided. The computer program / program product is stored in a storage medium, and the program / program product is executed by at least one processor to implement the steps of the cell selection method described in the first aspect, or to implement the steps of the cell selection method described in the third aspect.

[0017] In a twelfth aspect, a wireless communication system is provided, including: a terminal and a network-side device. 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 third aspect.

[0018] In the embodiments of the present application, the terminal can perform a first operation based on the first information of the first cell, and the first operation is an operation related to cell selection or cell reselection. In this solution, in the case where a cell supporting the default satellite operation mode coexists with a cell supporting the store-and-forward satellite operation mode, the terminal can utilize the relevant information of the first cell to perform an operation related to cell selection or reselection, so that the terminal can select or reselect to a suitable cell, thereby ensuring the communication reliability of the terminal. Description of the Drawings

[0019] Figure 1It is a schematic diagram of the architecture of a wireless communication system provided by an embodiment of the present application;

[0020] Figure 2 It is one of the flowcharts of a cell selection method provided by an embodiment of the present application;

[0021] Figure 3 It is another flowchart of a cell selection method provided by an embodiment of the present application;

[0022] Figure 4 It is yet another flowchart of a cell selection method provided by an embodiment of the present application;

[0023] Figure 5 It is one of the schematic diagrams of the structure of a cell selection device provided by an embodiment of the present application;

[0024] Figure 6 It is another schematic diagram of the structure of a cell selection device provided by an embodiment of the present application;

[0025] Figure 7 It is a schematic diagram of the hardware structure of a communication device provided by an embodiment of the present application;

[0026] Figure 8 It is a schematic diagram of the hardware structure of a terminal provided by an embodiment of the present application;

[0027] Figure 9 It is a schematic diagram of the hardware structure of a network - side device provided by an embodiment of the present application. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0029] The terms "first", "second", etc. in the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first" and "second" are usually of the same category, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "or" in the present application means at least one of the connected objects. For example, "A or B" covers three scenarios, namely, Scenario 1: including A and not including B; Scenario 2: including B and not including A; Scenario 3: including both A and B. The character " / " generally indicates an "or" relationship between the associated objects before and after.

[0030] The term "indication" in this application can be either a direct indication (or an explicit indication) or an indirect indication (or an implicit indication). Among them, a direct indication can be understood as that the sender clearly informs the receiver of specific information, operations to be performed, or request results, etc. in the sent indication; an indirect indication can be understood as that the receiver determines the corresponding information according to the indication sent by the sender, or makes a judgment and determines the operations to be performed or request results, etc. according to the judgment result.

[0031] The terms "at least one (item)", "at least one of", etc. in this application refer to any one, any two or a combination of two or more of its included objects. For example, at least one (item) of a, b, and c can represent: "a", "b", "c", "a and b", "a and c", "b and c", and "a, b, and c", where a, b, and c can be single or multiple. Similarly, "at least two (items)" means two or more, and its expressed meaning is similar to that of "at least one (item)".

[0032] It should be noted that the technology described in the embodiments of this application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, and 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 this application are often used interchangeably, and the described technology can be used not only in the systems and radio technologies mentioned above, but also in other systems and radio technologies. The following description describes the New Radio (NR) system for example purposes, and uses NR terms in most of the following descriptions, but these technologies can also be applied to systems other than the NR system, such as the 6th Generation (6G) communication system. th Generation, 6G) communication system.

[0033] Figure 1A block diagram of a wireless communication system to which embodiments of the present application can be applied is shown. The wireless communication system includes a terminal 11 and a network-side device 12. Among them, the terminal 11 can be a mobile phone, a tablet personal computer, a 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, a flight vehicle, a vehicle user equipment (VUE), a shipborne device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, TVs, washing machines, or furniture, etc.), a game console, a personal computer (PC), a teller machine, or a self-service machine, etc. Wearable devices include: smart watches, smart bracelets, smart earphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart ankle chains, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle user equipment can also be referred to as a vehicle terminal, a vehicle controller, a vehicle module, a vehicle component, a vehicle chip, or a vehicle unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiments of the present application. The network-side device 12 can include an access network device or a core network device. Among them, the access network device can also be referred to as a radio access network (RAN) device, a radio access network function, or a radio access network unit. The access network device can include a base station, a wireless local area network (WLAN) access point (AP), 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, Transmission Reception Point (TRP), or some other suitable term in the art. As long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiments of this application, only the base station in the NR system is taken as an example for introduction, and the specific type of the base station is not limited.

[0034] Some concepts and / or terms involved in a cell selection method, apparatus, device, and storage medium provided in the embodiments of this application will be explained below.

[0035] 1. NTN

[0036] NTN refers to a network or network segment that uses satellites or UAS platforms for transmission. Compared with terrestrial communication systems, satellite-based non-terrestrial communication systems have a wider coverage range. Typical scenarios where they are applicable include situations where terrestrial base stations cannot be built or are damaged, such as continuous coverage in remote mountainous areas, deserts, oceans, forests, or emergency communications when terrestrial base stations are damaged during natural disasters.

[0037] Satellites: include Low Earth Orbiting (LEO) satellites, Medium Earth Orbiting (MEO) satellites, Geostationary Earth Orbiting (GEO) satellites, and Highly Elliptical Orbiting (HEO) satellites, etc.

[0038] A typical scenario of a non-terrestrial network is based on a regenerative payload non-terrestrial network, where the base station is on a satellite, or the satellite is the base station. The link between the satellite and the terminal is the service link, and the link between the satellite and the terrestrial base station or terrestrial gateway is the feedback link.

[0039] 2. Store and Forward (S&F) satellite operations

[0040] The satellite store and forward operations in a system accessed via satellite are designed to provide delay-tolerant communication services to terminals in cases where there is intermittent or temporary satellite connectivity under satellite coverage (e.g., when the satellite is not connected to the terrestrial network via the feedback link or via an inter-satellite link).

[0041] In the "normal / default satellite operation" mode, signaling and data exchange between a terminal accessing the satellite and a remote terrestrial network require the simultaneous activation of the service link and the feeder link. In this way, when the terminal interacts with the satellite via the service link, there is a continuous end-to-end connection path between the terminal, the satellite, and the terrestrial network.

[0042] In the "S&F satellite operation" mode, the end-to-end exchange of signaling or data is now handled by a combination of two steps that are not synchronized in time (e.g., step A and step B). In step A, signaling / data exchange occurs between the terminal and the satellite, and at the same time, the satellite operates the service link without being connected to the terrestrial network (i.e., the satellite can operate the service link without an active feedback link connection). In step B, a connection is established between the satellite and the terrestrial network so that communication can occur between the satellite and the terrestrial network. Therefore, the satellite switches from being connected to the terminal in step A to being connected to the terrestrial network in step B.

[0043] The following will, in conjunction with the accompanying drawings, detail the cell selection method provided by the embodiments of the present application through some embodiments and their application scenarios.

[0044] The embodiments of the present application provide a cell selection method. Figure 2 The flowchart of the cell selection method provided by the embodiments of the present application is shown. As Figure 2 shown, the cell selection method provided by the embodiments of the present application may include the following steps 201 and 202.

[0045] Step 201: The terminal obtains the first information of the first cell.

[0046] In the embodiments of the present application, the above first information is used to indicate at least one of the following:

[0047] The satellite operation mode of the cell;

[0048] The time when the satellite connects to the ground gateway;

[0049] The time when the cell stops providing services;

[0050] The time when the cell stores data;

[0051] The data volume that the cell can store;

[0052] The first threshold, which is related to the maximum first data volume of the cells that the terminal can select or reselect;

[0053] The second threshold, which is related to the minimum first data volume of the cells that the terminal can select or reselect;

[0054] The service types supported by the cell;

[0055] The forwarding priority of the service types supported by the cell.

[0056] Wherein, the above-mentioned first data volume includes at least one of the following:

[0057] The data volume available to the terminal;

[0058] The data volume to be sent by the terminal.

[0059] It should be noted that the terminal in the embodiment of the present application supports operations related to the store-and-forward satellite operation mode. For example, the terminal can be a handheld terminal, an enhanced Machine-Type Communication (eMTC), or a Narrow Band Internet of Things (NB-IoT) device, etc., which is not limited in the embodiment of the present application.

[0060] The satellite in the embodiment of the present application is a satellite providing cell coverage. The cell in the embodiment of the present application refers to a satellite cell, that is, a cell within the satellite coverage area.

[0061] The end-to-end in the embodiment of the present application refers to the terminal to the satellite, and the satellite to the ground network (or ground gateway), which can be denoted as terminal-satellite-ground network.

[0062] The service link in the embodiment of the present application refers to the link between the terminal and the satellite, and the feedback link refers to the link between the satellite and the ground gateway.

[0063] Optionally, in the embodiment of the present application, the above-mentioned first information is used to indicate the satellite operation mode, and the satellite operation mode includes at least one of the following: default satellite operation mode, store-and-forward satellite operation mode.

[0064] Wherein, the above-mentioned default satellite operation mode includes at least one of the following:

[0065] Both the service link and the feedback link of the cell are available;

[0066] The connection between the satellite and the terrestrial gateway is available;

[0067] The cell supports end-to-end connection.

[0068] The above storage and forward satellite operation mode includes at least one of the following:

[0069] The service link of the cell is available and the feedback link of the cell is unavailable;

[0070] The connection between the satellite and the terrestrial gateway is unavailable;

[0071] The cell only supports the connection from the terminal to the satellite;

[0072] The cell does not support end-to-end connection.

[0073] It should be noted that the "available" described in the embodiments of the present application can also be understood as existing, established or activated; the "unavailable" described in the embodiments of the present application can also be understood as non-existent, disconnected, deactivated or deactivated.

[0074] Optionally, in the embodiments of the present application, the above first information is used to indicate the time when the satellite is connected to the terrestrial gateway; the above first information includes at least one of the following:

[0075] The time information when the feedback link is available;

[0076] The time information when both the service link and the feedback link are available;

[0077] The available time information of the connection between the satellite and the terrestrial gateway;

[0078] The available time information of the end-to-end connection.

[0079] Optionally, in the embodiments of the present application, the above first information specifically includes at least one of the following: (taking the description of establishing a connection between the satellite and the terrestrial gateway as an example):

[0080] The first time information, indicating the time when the satellite establishes a connection with the terrestrial gateway, and the specific form includes at least one of the following: absolute time (such as Universal Time Coordinated (UTC) time), relative time (such as frame number, sub-frame number, number of symbols or number of time slots, with the timing of the serving cell as a reference);

[0081] The second time information, indicating how much time is left until the satellite establishes a connection with the terrestrial gateway, for example, the time unit is hours / minutes / seconds / milliseconds, for example, there are still 2 hours until the satellite establishes a connection with the terrestrial gateway.

[0082] Optionally, in the embodiments of the present application, the above first information is used to indicate the time when the cell stops service; the above first information includes at least one of the following:

[0083] Time information when the service link is unavailable;

[0084] Time information when the feedback link is unavailable;

[0085] Time information when the cell stops serving the current coverage area.

[0086] Optionally, in the embodiments of the present application, the above first specifically includes at least one of the following:

[0087] Third time information, indicating the time when the cell stops serving the current coverage area, and the specific form includes at least one of the following: absolute time (such as UTC time), relative time (such as frame number, sub-frame number, number of symbols or number of time slots, with the timing of the serving cell as a reference);

[0088] Fourth time information, indicating how much time is left until the cell stops serving the current coverage area, for example, the time unit is hours / minutes / seconds / milliseconds, for example, there are still 5 minutes until the cell stops serving the current coverage area.

[0089] Optionally, in the embodiments of the present application, the above first information is used to indicate the time when the cell stores data, and the time when the cell stores data can also be the time when the satellite stores data, and the satellite is the satellite providing cell coverage.

[0090] Optionally, in the embodiments of the present application, the above first information specifically includes at least one of the following:

[0091] Fifth time information, indicating the time period when the cell stores data and / or signaling, for example, including a start time and an end time, or including a start time and a duration, or including an end time;

[0092] Sixth time information, indicating how much time is left until the cell stores data or signaling, for example, the time unit is hours / minutes / seconds / milliseconds, for example, the cell can still store data or signaling for 10 hours.

[0093] Optionally, in the embodiments of the present application, the above data may include at least one of control plane data and user plane data.

[0094] Optionally, in the embodiments of the present application, the above first information is used to indicate the amount of data that the cell can store; the above first information includes at least one of the following:

[0095] Total amount of data that the cell can store information (for example, the unit can be megabytes, Kb or bits);

[0096] The remaining storable data volume information of the cell;

[0097] The used storable data volume information of the cell.

[0098] Optionally, in the embodiments of the present application, the above first information is used to indicate the service type or traffic type supported by the cell, specifically including at least one of the following: emergency service, high-priority access service (related to AC11…15), mobile terminal (MT) access service, mobile originating (MO) signal service, MO data service, delay-tolerant access (delayTolerantAccess-v1020), voice call (mo-VoiceCall-v1280), delay-sensitive traffic, session-based traffic, streaming media traffic, interactive traffic, background traffic.

[0099] Optionally, in the embodiments of the present application, the above first information is used to indicate a threshold related to the data volume

[0100] Optionally, in the embodiments of the present application, the above first information is used to indicate the forwarding priority of the service type supported by the cell. For example, the forwarding priority can be represented by a numerical value, where the larger the numerical value, the higher the priority, or the larger the numerical value, the lower the priority.

[0101] Optionally, in the embodiments of the present application, step 201 can be specifically implemented by the following step 201a or step 201b.

[0102] Step 201a: The terminal receives the system message from the first cell.

[0103] In the embodiments of the present application, the above system message includes the first information.

[0104] Optionally, in the embodiments of the present application, the above system message can be System Information Block 1 (SIB1), SIB31, or SIB19, etc. Among them, SIB31 is used to provide satellite assistance information of the serving cell (i.e., including the first information). SIB19 is used to provide satellite assistance information for NTN access (i.e., including the first information). In this case, only NTN cells can provide the above first information, that is, the first cell is an NTN cell.

[0105] Step 201b: The terminal receives the system message from the fourth cell.

[0106] In the embodiments of the present application, the above-mentioned fourth cell is the serving cell of the terminal, the first cell is the neighboring cell of the terminal, and the system message includes the first information.

[0107] Optionally, in the embodiments of the present application, the system message of the above-mentioned fourth cell may be SIB3, SIB4, SIB5, SIB for providing satellite assistance information (i.e., the first information) of the neighboring cell, or SIB19 of the fourth cell.

[0108] Step 202: The terminal performs a first operation based on the first information.

[0109] In the embodiments of the present application, the above-mentioned first operation is an operation related to cell selection or cell reselection.

[0110] Optionally, in the embodiments of the present application, the above-mentioned first operation includes at least one of the following: a second operation, a third operation, a fourth operation, a fifth operation, and a sixth operation.

[0111] Among them, the above-mentioned second operation includes at least one of the following:

[0112] Do not consider the first cell as a suitable cell;

[0113] Consider the first cell as an acceptable cell;

[0114] Consider the first cell as prohibited;

[0115] Do not consider the first cell as a candidate cell for the first operation.

[0116] The above-mentioned third operation includes at least one of the following:

[0117] Consider the serving frequency as the highest priority frequency;

[0118] Consider the frequencies other than the serving frequency as the lowest priority frequencies;

[0119] Increase the priority of the serving frequency by a first offset;

[0120] Decrease the priority of the frequencies other than the serving frequency by a second offset;

[0121] Increase the first value of the serving cell by a third offset, where the first value is the cell selection reception level value;

[0122] Increase the second value of the serving cell by a fourth offset, where the second value is the cell selection quality value;

[0123] Decrease the third threshold by a fifth offset, where the third threshold is the threshold for the first value used for co-frequency measurement;

[0124] Decrease the fourth threshold by a sixth offset, where the fourth threshold is the threshold for the second value used for co-frequency measurement;

[0125] Reduce the fifth threshold by a seventh offset, where the fifth threshold is the threshold for the first value used for inter-frequency or inter-system frequency measurement;

[0126] Reduce the sixth threshold by an eighth offset, where the sixth threshold is the threshold for the second value used for inter-frequency or inter-system frequency measurement.

[0127] Exemplarily, the above-mentioned first value is Srxlev, the second value is Squal, the third threshold is SIntraSearchP, the fourth threshold is SIntraSearchQ, the fifth threshold is SnonIntraSearchP, and the sixth threshold is SnonIntraSearchQ.

[0128] The above fourth operation includes at least one of the following:

[0129] Exclude the first cell during the execution of the first operation;

[0130] When the first cell is not the serving cell of the terminal and the frequency where the first cell is located is the same as the serving frequency, reduce the R value of the first cell by a ninth offset;

[0131] Reduce the first value of the first cell by a tenth offset, where the first value is the cell selection received level value;

[0132] Reduce the second value of the first cell by an eleventh offset, where the second value is the cell selection quality value;

[0133] Increase the first value of the serving cell by a twelfth offset, where the first value is the cell selection received level value;

[0134] Increase the second value of the serving cell by a thirteenth offset, where the second value is the cell selection quality value;

[0135] Increase the seventh threshold by a fourteenth offset, where the seventh threshold is the threshold for the first value used for a higher priority frequency or a higher priority inter-system frequency;

[0136] Increase the eighth threshold by a fifteenth offset, where the eighth threshold is the threshold for the second value used for a higher priority frequency or a higher priority inter-system frequency;

[0137] Increase the ninth threshold by a sixteenth offset, where the ninth threshold is the threshold for the first value used for a lower priority frequency or a lower priority inter-system frequency;

[0138] Increase the tenth threshold by a seventeenth offset, where the tenth threshold is the threshold for the second value used for a lower priority frequency or a lower priority inter-system frequency;

[0139] Reduce the eleventh threshold by the eighteenth offset, where the eleventh threshold is the threshold for the first value of the serving cell for a lower priority frequency or a lower priority inter-system frequency;

[0140] Increase the twelfth threshold by the nineteenth offset, where the twelfth threshold is the threshold for the second value of the serving cell for a lower priority frequency or a lower priority inter-system frequency.

[0141] Exemplarily, the above seventh threshold is ThreshX,HighQ, the eighth threshold is ThreshX,HighP, the ninth threshold is ThreshX,lowQ, the tenth threshold is ThreshServing,LowQ, the eleventh threshold is ThreshServing,LowQ, and the twelfth threshold is ThreshServing,LowP.

[0142] The above fifth operation includes not performing an Access Stratum (AS) operation, where the AS operation is an operation related to any of the following: cell search, cell measurement, cell selection, cell reselection;

[0143] The above sixth operation includes at least one of the following:

[0144] Give priority to measuring the frequency of the first cell; for example, always measure based on requirements, and for another example, if the terminal starts measuring the frequency priority type to which the frequency of the first cell belongs, the terminal first measures the frequency of the first cell;

[0145] Give priority to selecting or reselecting the first cell;

[0146] Consider the first cell as a suitable cell.

[0147] It should be noted that in the embodiments of the present application, the offset is configured, pre-configured or agreed upon by the network side device. The threshold in the embodiments of the present application is configured, pre-configured or agreed upon by the network side device.

[0148] Optionally, in the embodiments of the present application, excluding the first cell during the execution of the first operation includes at least one of the following:

[0149] Do not measure the frequency where the first cell is located;

[0150] Do not perform reselection evaluation on the first cell; for example, for intra-frequency reselection, do not perform R-criterion sorting on a cell that only supports the store-and-forward satellite operation mode;

[0151] Do not consider the first cell as a candidate cell for cell selection or cell reselection.

[0152] Optionally, in the embodiments of the present application, preferentially performing the measurement of the frequency where the first cell is located includes at least one of the following:

[0153] Regarding the frequency where the first cell is located as the frequency with the highest priority;

[0154] Regarding the frequencies other than the frequency where the first cell is located as the frequencies with the lowest priority;

[0155] Increasing the priority of the frequency where the first cell is located by twenty offsets;

[0156] Reducing the priority of the frequencies other than the frequency where the first cell is located by twenty-one offsets;

[0157] Increasing the third threshold by twenty-two offsets, where the third threshold is the threshold for the first value used for co-frequency measurement;

[0158] Increasing the fourth threshold by twenty-three offsets, where the fourth threshold is the threshold for the second value used for co-frequency measurement;

[0159] Increasing the fifth threshold by twenty-four offsets, where the fifth threshold is the threshold for the first value used for inter-frequency or inter-system frequency measurement;

[0160] Increasing the sixth threshold by twenty-five offsets, where the sixth threshold is the threshold for the second value used for inter-frequency or inter-system frequency measurement.

[0161] Optionally, in the embodiments of the present application, preferentially selecting or reselecting the first cell includes at least one of the following:

[0162] When the frequency where the first cell is located is different from the serving frequency, preferentially evaluating the first cell;

[0163] When the frequency where the first cell is located is the same as the serving frequency or the priority of the frequency where the first cell is located is equal to the priority of the serving frequency, increasing the R value of the first cell by twenty-six offsets;

[0164] When the frequency where the first cell is located is the same as the serving frequency or the priority of the frequency where the first cell is located is equal to the priority of the serving frequency, reducing the R value of the other cells except the first cell by twenty-seven offsets, where the frequencies of the other cells are the same as the serving frequency;

[0165] When the frequency where the first cell is located is the same as the serving frequency or the priority of the frequency where the first cell is located is equal to the priority of the serving frequency, if the R value of the first cell exceeds the thirteenth threshold, selecting or reselecting the first cell; for example, the thirteenth threshold can be a threshold agreed upon by the protocol or configured by the network-side device, or a value that is offset by one from the cell with the highest R value, where the offset can be agreed upon by the protocol or configured by the network-side device;

[0166] Increase the first value of the first cell by the twenty-eighth offset, where the first value is the cell selection received level value;

[0167] Increase the second value of the first cell by the twenty-ninth offset, where the second value is the cell selection quality value;

[0168] When the priority of the frequency where the first cell is located is higher than the priority of the serving frequency, decrease the seventh threshold by the thirtieth offset, where the seventh threshold is the threshold for the first value of a higher priority frequency or a higher priority inter-system frequency;

[0169] When the priority of the frequency where the first cell is located is higher than the priority of the serving frequency, decrease the eighth threshold by the thirty-first offset, where the eighth threshold is the threshold for the second value of a higher priority frequency or a higher priority inter-system frequency;

[0170] When the priority of the frequency where the first cell is located is lower than the priority of the serving frequency, decrease the ninth threshold by the thirty-second offset, where the ninth threshold is the threshold for the first value of a lower priority frequency or a lower priority inter-system frequency;

[0171] When the priority of the frequency where the first cell is located is lower than the priority of the serving frequency, decrease the tenth threshold by the thirty-third offset, where the tenth threshold is the threshold for the second value of a lower priority frequency or a lower priority inter-system frequency;

[0172] When the priority of the frequency where the first cell is located is lower than the priority of the serving frequency, increase the eleventh threshold by the thirty-fourth offset, where the eleventh threshold is the threshold for the first value of the serving cell of a lower priority frequency or a lower priority inter-system frequency;

[0173] When the priority of the frequency where the first cell is located is lower than the priority of the serving frequency, increase the twelfth threshold by the thirty-fifth offset, where the twelfth threshold is the threshold for the second value of the serving cell of a lower priority frequency or a lower priority inter-system frequency.

[0174] The above first offset to the thirty-fifth offset can be agreed upon by the protocol or configured by the network side.

[0175] Optionally, in the embodiments of the present application, when the terminal is not camped on any cell, the above first operation is the second operation. In this way, it is not easy for the terminal to select the first cell (for example, the first cell only supports the store-and-forward satellite operation mode or the first cell supports the default satellite operation mode).

[0176] Optionally, in the embodiments of the present application, when the serving cell of the terminal is the second cell, the first operation includes at least one of the following: a second operation, a third operation, a fourth operation, a fifth operation, and a sixth operation; wherein the second cell supports the default satellite operation mode. In this way, since the terminal has camped on the second cell (for example, supporting the default satellite operation mode), it is not easy to reselect to the first cell (for example, the first cell only supports the store-and-forward satellite operation mode) or preferentially reselect to the first cell (for example, the first cell supports the default satellite operation mode).

[0177] Optionally, in the embodiments of the present application, when the serving cell of the terminal is the third cell, the first operation includes at least one of the following: a second operation, a third operation, a fourth operation, a fifth operation, and a sixth operation; wherein the third cell supports the store-and-forward satellite operation mode. In this way, since the terminal has camped on the third cell (for example, supporting the store-and-forward satellite operation mode), it is not easy to reselect to the first cell (for example, the first cell is other than the third cell), or preferentially reselect to the first cell (for example, the first cell supports the store-and-forward satellite operation mode).

[0178] Optionally, in the embodiments of the present application, when the terminal is not camped on any cell, the first operation is the second operation, including at least one of the following:

[0179] When the first cell only supports the store-and-forward satellite operation mode and the terminal is not camped on any cell, the first operation is the second operation;

[0180] When the first cell only supports the store-and-forward satellite operation mode, meets the first condition, and the terminal is not camped on any cell, the first operation is the second operation;

[0181] When the first cell only supports the default satellite operation mode and the terminal is not camped on any cell, the first operation is the second operation;

[0182] When the first cell only supports the default satellite operation mode, meets the second condition, and the terminal is not camped on any cell, the first operation is the second operation.

[0183] Optionally, in the embodiments of the present application, when the serving cell of the terminal is the second cell, the first operation includes at least one of the following: a second operation, a third operation, a fourth operation, a fifth operation, and a sixth operation; including at least one of the following:

[0184] When the first cell only supports the store-and-forward satellite operation mode and the serving cell of the terminal is the second cell, the first operation includes at least one of the following: a second operation, a third operation, a fourth operation, and a fifth operation;

[0185] When only the store-and-forward satellite operation mode is supported in the first cell, the serving cell of the terminal is the second cell, and the first condition is satisfied, the first operation includes at least one of the following: the second operation, the third operation, the fourth operation, and the fifth operation;

[0186] When the default satellite operation mode is supported in the first cell and the serving cell of the terminal is the second cell, the first operation includes the sixth operation;

[0187] When the default satellite operation mode is supported in the first cell, the serving cell of the terminal is the second cell, and the first condition is satisfied, the first operation includes the sixth operation.

[0188] Optionally, in the embodiments of the present application, when the serving cell of the terminal is the third cell, the first operation includes at least one of the following: the second operation, the third operation, the fourth operation, the fifth operation, and the sixth operation; including at least one of the following:

[0189] When only the default satellite mode is supported in the first cell and the serving cell of the terminal is the third cell, the first operation includes the second operation, the third operation, the fourth operation, and the fifth operation;

[0190] When only the default satellite mode is supported in the first cell, the serving cell of the terminal is the third cell, and the second condition is satisfied, the first operation includes the second operation, the third operation, the fourth operation, and the fifth operation;

[0191] When the first cell is other than the third cell and the serving cell of the terminal is the third cell, the first operation includes the second operation, the third operation, the fourth operation, and the fifth operation;

[0192] When the first cell is other than the third cell, the serving cell of the terminal is the third cell, and the second condition is satisfied, the first operation includes the second operation, the third operation, the fourth operation, and the fifth operation;

[0193] When the store-and-forward satellite operation mode is supported in the first cell and the serving cell of the terminal is the third cell, the first operation includes the sixth operation;

[0194] When the store-and-forward satellite operation mode is supported in the first cell, the serving cell of the terminal is the third cell, and the second condition is satisfied, the first operation includes the sixth operation.

[0195] Optionally, in the embodiments of the present application, the above first condition includes at least one of the following:

[0196] The terminal does not support operations related to the store-and-forward satellite operation mode;

[0197] The terminal does not initiate services related to store-and-forward;

[0198] The terminal is in the first operation mode, and the first operation mode is that communication can only be performed in a cell that supports the default satellite operation mode;

[0199] The terminal is not in the second operation mode, and the second operation mode is that communication can only be performed in a cell that supports the store-and-forward satellite operation mode.

[0200] Optionally, in the embodiments of the present application, the above second condition includes at least one of the following:

[0201] The terminal has initiated a service related to store-and-forward;

[0202] The terminal is initiating a service related to store-and-forward;

[0203] There is a service related to store-and-forward to be initiated;

[0204] The terminal is in the second operation mode, and the second operation mode is that communication can only be performed in a cell that supports the store-and-forward satellite operation mode;

[0205] The terminal is not in the first operation mode, and the first operation mode is that communication can only be performed in a cell that supports the default satellite operation mode;

[0206] The cell where the terminal previously camped or is currently camping supports the store-and-forward satellite operation mode;

[0207] The terminal has initiated an uplink transmission on the cell that previously camped or is currently camping and supports the store-and-forward satellite operation mode;

[0208] The terminal has successfully established a connection with a cell that supports the store-and-forward satellite operation mode;

[0209] The terminal is waiting for a downlink transmission from the cell that previously camped or is currently camping and supports the store-and-forward satellite operation mode.

[0210] Optionally, in the embodiments of the present application, the above first information is used to indicate the satellite operation mode; the specific implementation of step 202 can be achieved through step 202a1 or step 202a2 described below.

[0211] Step 202a: When the first cell only supports the store-and-forward satellite operation mode, the terminal performs at least one of the following: the second operation, the third operation, the fourth operation, the fifth operation, and the sixth operation.

[0212] Step 202b: When the first cell only supports the store-and-forward satellite operation mode and meets the first condition, the terminal performs at least one of the following: the second operation, the third operation, the fourth operation, and the fifth operation.

[0213] In the embodiments of the present application, the above first condition includes at least one of the following:

[0214] The terminal does not support operations related to the store-and-forward satellite operation mode;

[0215] The terminal does not initiate services related to store-and-forward;

[0216] The terminal is in a first operation mode, and this first operation mode is for communication only in a cell that supports the default satellite operation mode;

[0217] The terminal is not in a second operation mode, and this second operation mode is for communication only in a cell that supports the store-and-forward satellite operation mode.

[0218] It can be understood that the first operation mode is related to the default satellite operation mode, that is, a terminal in the first operation mode can communicate only in a cell that supports the default satellite operation mode. The second operation mode is related to the store-and-forward satellite operation mode, that is, a terminal in the second operation mode can communicate only in a cell that supports the store-and-forward satellite operation mode.

[0219] Optionally, in the embodiments of the present application, the cells that support the default satellite operation mode may include at least one of the following: Geosynchronous Satellite Orbit (GSO) cells, GEO cells, LEO cells, MEO cells, Terrestrial Networks (TN) cells.

[0220] Optionally, in the embodiments of the present application, the AS of the terminal determines whether to initiate services related to store-and-forward, or determines the operation mode of the terminal. Alternatively, the Non-Access Stratum (NAS) of the terminal determines whether to initiate services related to store-and-forward, or determines the operation mode of the terminal.

[0221] Optionally, in the embodiments of the present application, the NAS instructs the AS to perform at least one of the following:

[0222] Initiate or not initiate services related to store-and-forward;

[0223] Initiate or not initiate services related to the default satellite operation mode.

[0224] In this way, it is less likely for the terminal to select or reselect to a cell that only supports the store-and-forward satellite operation mode.

[0225] Optionally, in the embodiments of the present application, the above first information is used to indicate the satellite operation mode; the above step 202 can be specifically implemented by the following step 202a3 or step 202a4.

[0226] Step 202a3: When the first cell only supports the default satellite operation mode, the terminal performs at least one of the following: the second operation, the third operation, the fourth operation, and the fifth operation.

[0227] Step 202a4: When the first cell only supports the default satellite operation mode and the second condition is satisfied, the terminal performs at least one of the following: the second operation, the third operation, the fourth operation, and the fifth operation.

[0228] In the embodiments of the present application, the second condition includes at least one of the following:

[0229] The terminal has initiated a service related to store-and-forward;

[0230] The terminal is initiating a service related to store-and-forward;

[0231] There is a service related to store-and-forward to be initiated;

[0232] The terminal is in the second operation mode, which is a mode that can only communicate in a cell supporting the store-and-forward satellite operation mode;

[0233] The terminal is not in the first operation mode, which is a mode that can only communicate in a cell supporting the default satellite operation mode.

[0234] In this way, it is not easy for the terminal that has camped on a cell supporting the store-and-forward satellite operation mode to reselect a cell supporting the default satellite operation mode.

[0235] Optionally, in the embodiments of the present application, the above first information is used to indicate the satellite operation mode; the above step 202 can be specifically implemented by the following step 202a5 or step 202a6.

[0236] Step 202a5: When the first cell is the third cell, the terminal performs at least one of the following: the second operation, the third operation, the fourth operation, the fifth operation, and the sixth operation.

[0237] Step 202a6: When the first cell is the third cell and the third condition is satisfied, the terminal performs at least one of the following: the second operation, the third operation, the fourth operation, the fifth operation, and the sixth operation.

[0238] In the embodiments of the present application, the above third cell supports the store-and-forward satellite operation mode. The third condition includes at least one of the following:

[0239] The cell where the terminal camped before or is currently camping supports the store-and-forward satellite operation mode;

[0240] The terminal has initiated an uplink transmission on a cell that supported the store-and-forward satellite operation mode where it was previously camped or is currently camped; for example, the terminal has initiated a connection establishment request on this cell, such as sending an initial NAS message;

[0241] The terminal has successfully established a connection with the first cell; for example, it has successfully completed the Radio Resource Control (RRC) connection establishment process;

[0242] The terminal is waiting for a downlink transmission from a cell that supported the store-and-forward satellite operation mode where it was previously camped or is currently camped; for example, it is waiting for the transmission of a downlink NAS message.

[0243] Optionally, in the embodiments of the present application, the above first information is used to indicate the time when the satellite is connected to the terrestrial gateway; the above step 202 can be specifically implemented by the following step 202b1.

[0244] Step 202b1: When the first information meets the fourth condition, the terminal performs a sixth operation;

[0245] Among them, the fourth condition includes at least one of the following:

[0246] The interval between the current time and the time indicated by the first information is less than or equal to the fourteenth threshold;

[0247] The interval between the current time and the time indicated by the first information is the smallest among the neighboring cells of the terminal.

[0248] Optionally, in the embodiments of the present application, the above first information is used to indicate the time when the satellite is connected to the terrestrial gateway; the above step 202 can be specifically implemented by the following step 202b2 or step 202b3.

[0249] Step 202b2: When the interval between the current time and the time indicated by the first information is greater than or equal to the fifteenth threshold, the terminal performs at least one of the following: a second operation, a third operation, and a fourth operation.

[0250] Step 202b3: When the interval between the current time and the time indicated by the first information is greater than or equal to the fifteenth threshold and meets the second condition, the terminal performs at least one of the following: a second operation, a third operation, and a fourth operation.

[0251] In the embodiments of the present application, the above second condition includes at least one of the following:

[0252] The terminal has initiated, is initiating, or is to initiate a service related to store-and-forward;

[0253] The terminal is in a second operation mode, and the second operation mode is that communication can only be performed in a cell that supports the store-and-forward satellite operation mode;

[0254] The terminal is not in the first operation mode, which is a communication mode that can only be performed in a cell supporting the default satellite operation mode.

[0255] Optionally, in the embodiments of the present application, the first information is used to indicate the time when the cell stops service; the step 202 can be specifically implemented by the following step 202c1 or step 202c2.

[0256] Step 202c1: When the first information meets the fifth condition, the terminal performs the sixth operation.

[0257] Step 202c2: When the interval between the current time and the time indicated by the first information is less than or equal to the sixteenth threshold, the terminal performs at least one of the following: the second operation, the third operation, and the fourth operation.

[0258] In the embodiments of the present application, the fifth condition includes at least one of the following:

[0259] The interval between the current system time and the time indicated by the first information is greater than or equal to the sixteenth threshold;

[0260] The interval between the current system time and the time indicated by the first information is the largest time interval among the neighboring cells of the terminal.

[0261] Optionally, in the embodiments of the present application, the first information is used to indicate the time when the cell stores data; the step 202 can be specifically implemented by the following step 202d1 or step 202d2.

[0262] Step 202d1: When the first information meets the sixth condition, the terminal performs the sixth operation.

[0263] Step 202d2: When the first information meets the seventh condition, the terminal performs at least one of the following: the second operation, the third operation, and the fourth operation.

[0264] In the embodiments of the present application, the sixth condition includes at least one of the following:

[0265] The start time for the cell to store data has arrived;

[0266] The end time for the cell to store data has not arrived;

[0267] The seventh condition includes at least one of the following:

[0268] The start time for the cell to store data has not arrived;

[0269] The interval between the current time and the end time for the cell to store data is less than or equal to the seventeenth threshold.

[0270] Optionally, in the embodiments of the present application, the end time for storing signaling or data in the above cell has not been reached, including:

[0271] The interval between the current time and the end time of storing data in the cell is greater than or equal to the seventeenth threshold;

[0272] The interval between the current system time and the end time of storing signaling or data in the cell is the largest time interval among the neighboring cells of the terminal.

[0273] Optionally, in the embodiments of the present application, the above first information is used to indicate the data volume that the cell can store; the specific implementation of step 202 can be achieved through step 202e1 or step 202e2 described below.

[0274] Step 202e1: When the first information meets the eighth condition, the terminal performs the sixth operation.

[0275] Step 202e2: When the first information meets the ninth condition, the terminal performs at least one of the following: the second operation, the third operation, and the fourth operation.

[0276] In the embodiments of the present application, the above eighth condition includes at least one of the following:

[0277] The remaining storage space in the cell is greater than or equal to the eighteenth threshold;

[0278] The remaining storage space in the cell is greater than or equal to the first data volume of the terminal;

[0279] The first data volume of the terminal is less than or equal to the first threshold;

[0280] The second data volume of the terminal is greater than or equal to the second threshold;

[0281] The ninth condition includes at least one of the following:

[0282] The remaining storage space in the cell is less than or equal to the eighteenth threshold;

[0283] The remaining storage space in the cell is less than or equal to the first data volume of the terminal;

[0284] Among them, the first data volume includes at least one of the following:

[0285] The available data volume of the terminal;

[0286] The data volume to be sent by the terminal.

[0287] Optionally, in the embodiments of the present application, the above first information is used to indicate the service type supported by the cell; the specific implementation of step 202 can be achieved through step 202f1 or step 202f2 described below.

[0288] Step 202f1: When the service type initiated by the terminal matches the service type supported by the first cell, the terminal performs a sixth operation.

[0289] Optionally, in the embodiments of the present application, the service type initiated by the terminal matching the service type supported by the first cell includes at least one of the following:

[0290] There is an intersection between the service type initiated by the terminal and the service type supported by the first cell;

[0291] The service type initiated by the terminal is a subset of the service type supported by the first cell.

[0292] It should be noted that the service type initiated by the terminal described in the embodiments of the present application can be understood as: the service type that the terminal is initiating, about to initiate, or has initiated.

[0293] Step 202f2: When the service type initiated by the terminal does not match the service type supported by the first cell, the terminal performs at least one of the following: a second operation, a third operation, and a fourth operation.

[0294] Optionally, in the embodiments of the present application, the service type initiated by the terminal not matching the service type supported by the first cell includes: the intersection between the service type initiated by the terminal and the service type supported by the first cell is empty.

[0295] Optionally, in the embodiments of the present application, the service type initiated by the terminal is determined by the AS or the NAS. If it is determined by the NAS, the NAS instructs the service type initiated by the terminal to the AS.

[0296] Optionally, in the embodiments of the present application, the above first information is used to indicate the forwarding priority of the service type supported by the cell; the above step 202 can be specifically implemented by any one of the following steps 202g1 to 202g4.

[0297] Step 202g1: When the forwarding priority corresponding to the service type initiated by the terminal is higher than or equal to the nineteenth threshold, the terminal performs a sixth operation.

[0298] Step 202g2: When the forwarding priority corresponding to the service type initiated by the terminal is the highest priority, the terminal performs a sixth operation.

[0299] Step 202g3: When the forwarding priority corresponding to the service type initiated by the terminal is lower than or equal to the nineteenth threshold, the terminal performs at least one of the following: a second operation, a third operation, and a fourth operation.

[0300] Step 202g4: When the forwarding priority corresponding to the service type that the terminal is initiating, to be initiated, or has initiated is the lowest priority, the terminal performs at least one of the following: a second operation, a third operation, and a fourth operation.

[0301] Optionally, in the embodiments of the present application, in combination with Figure 2 , as Figure 3 shown, the above step 202 can be specifically implemented by the following step 202h.

[0302] Step 202h: The terminal performs a first operation in a first area based on the first information.

[0303] In the embodiments of the present application, the above first area includes at least one of the following:

[0304] An area indicated by at least one tracking area identifier;

[0305] An area indicated by at least one tracking area code;

[0306] At least one geographical area.

[0307] Optionally, in the embodiments of the present application, the first area is configured by a network-side device or agreed upon by a protocol.

[0308] Optionally, in the embodiments of the present application, the above at least one geographical area can be determined by a reference point (geographical coordinate point) and a distance threshold identifier, or determined by multiple coordinate points.

[0309] The embodiments of the present application provide a cell selection method. The terminal can perform a first operation based on the first information of the first cell, and the first operation is an operation related to cell selection or cell reselection. In this solution, in the case where a cell supporting the default satellite operation mode coexists with a cell supporting the store-and-forward satellite operation mode, the terminal can use the relevant information of the first cell to perform an operation related to cell selection or reselection, so that the terminal can select or reselect to a suitable cell, thereby ensuring the communication reliability of the terminal.

[0310] The embodiments of the present application provide a cell selection method, Figure 4 which shows a flowchart of the cell selection method provided by the embodiments of the present application. As Figure 4 shown, the cell selection method provided by the embodiments of the present application may include the following steps 301 to 303.

[0311] Step 301: The network-side device sends the first information of the first cell to the terminal.

[0312] In the embodiments of the present application, the above first information is used to perform a first operation, and the first operation is an operation related to cell selection or cell reselection. The above first information is used to indicate at least one of the following:

[0313] Satellite operation mode of the cell;

[0314] Time when the satellite is connected to the terrestrial gateway;

[0315] Time when the cell stops providing services;

[0316] Time when the cell stores data;

[0317] Data volume that the cell can store;

[0318] First threshold, which is related to the maximum first data volume of the cells that the terminal can select or reselect;

[0319] Second threshold, which is related to the minimum first data volume of the cells that the terminal can select or reselect;

[0320] Service types supported by the cell;

[0321] Forwarding priority of the service types supported by the cell.

[0322] Wherein, the above first data volume includes at least one of the following:

[0323] Data volume available to the terminal;

[0324] Data volume to be sent by the terminal.

[0325] Step 302: The terminal receives first information from the network-side device.

[0326] Step 303: The terminal performs a first operation based on the first information.

[0327] Optionally, in the embodiments of the present application, the above first information is used to indicate a satellite operation mode, and the satellite operation mode includes at least one of the following: default satellite operation mode, store-and-forward satellite operation mode;

[0328] Wherein, the default satellite operation mode includes at least one of the following:

[0329] Both the service link and the feedback link of the cell are available;

[0330] The connection between the satellite and the terrestrial gateway is available;

[0331] The cell supports end-to-end connection;

[0332] The store-and-forward satellite operation mode includes at least one of the following:

[0333] The service link of the cell is available, and the feedback link of the cell is unavailable;

[0334] The connection between the satellite and the terrestrial gateway is unavailable;

[0335] The cell only supports the connection from the terminal to the satellite;

[0336] The cell does not support end-to-end connections.

[0337] Optionally, in the embodiments of the present application, the above first information is used to indicate the time when the satellite is connected to the terrestrial gateway;

[0338] The first information includes at least one of the following:

[0339] The time information when the feedback link is available;

[0340] The time information when both the service link and the feedback link are available;

[0341] The time information when the connection between the satellite and the terrestrial gateway is available;

[0342] The time information when the end-to-end connection is available.

[0343] Optionally, in the embodiments of the present application, the above first information is used to indicate the time when the cell stops service;

[0344] The first information includes at least one of the following:

[0345] The time information when the service link is unavailable;

[0346] The time information when the feedback link is unavailable;

[0347] The time information when the cell stops serving the current coverage area.

[0348] Optionally, in the embodiments of the present application, the above first information is used to indicate the data volume that the cell can store;

[0349] The first information includes at least one of the following:

[0350] The total data volume information that the cell can store;

[0351] The remaining data volume information that the cell can store;

[0352] The data volume information that the cell has used for storage.

[0353] It should be noted that for the first information, the first operation and the related solutions involved in the network-side device, reference can be made to the descriptions in the above embodiments, and details are not elaborated here.

[0354] An embodiment of the present application provides a cell selection method. The network - side device can send the first information of the first cell to the terminal, so that the terminal can perform a first operation based on the first information of the first cell, and the first operation is an operation related to cell selection or cell reselection. In this solution, in the case where a cell supporting the default satellite operation mode coexists with a cell supporting the store - and - forward satellite operation mode, the terminal can use the relevant information of the first cell from the network - side device to perform an operation related to cell selection or reselection, so that the terminal can select or reselect to a suitable cell, thereby ensuring the communication reliability of the terminal.

[0355] Each of the above - mentioned method embodiments, or various possible implementation manners in each method embodiment, can be executed alone, or any two or more of them can be combined and executed. Specifically, it can be determined according to actual usage requirements, and the embodiments of the present application do not limit this.

[0356] For the cell selection method provided by the embodiment of the present application, the execution subject can be a cell selection device. In the embodiment of the present application, taking the cell selection device executing the cell selection method as an example, the cell selection device provided by the embodiment of the present application is described.

[0357] Figure 5 A possible structural schematic diagram of the cell selection device involved in the embodiment of the present application is shown. As Figure 5 shown, the cell selection device 40 may include: an acquisition module 41 and an execution module 42.

[0358] Among them, the acquisition module 41 is used to acquire the first information of the first cell. The execution module 42 is used to perform a first operation based on the first information acquired by the acquisition module 41. Among them, the first operation is an operation related to cell selection or cell reselection; the first information is used to indicate at least one of the following: the satellite operation mode of the cell; the time when the satellite is connected to the ground gateway; the time when the cell stops service; the time when the cell stores data; the amount of data that the cell can store; a first threshold, where the first threshold is related to the maximum first data amount of the cell that the terminal can select or reselect; a second threshold, where the second threshold is related to the minimum first data amount of the cell that the terminal can select or reselect; the service types supported by the cell; the forwarding priority of the service types supported by the cell; where the first data amount includes at least one of the following: the amount of data available to the terminal; the amount of data to be sent by the terminal.

[0359] In a possible implementation manner, the above - mentioned first information is used to indicate the satellite operation mode, and the satellite operation mode includes at least one of the following: the default satellite operation mode, the store - and - forward satellite operation mode;

[0360] Among them, the default satellite operation mode includes at least one of the following:

[0361] The service link and feedback link of the cell are both available;

[0362] The connection between the satellite and the terrestrial gateway is available;

[0363] The cell supports end-to-end connection;

[0364] The store-and-forward satellite operation mode includes at least one of the following:

[0365] The service link of the cell is available, and the feedback link of the cell is unavailable;

[0366] The connection between the satellite and the terrestrial gateway is unavailable;

[0367] The cell only supports the connection from the terminal to the satellite;

[0368] The cell does not support end-to-end connection.

[0369] In a possible implementation, the above first information is used to indicate the time when the satellite is connected to the terrestrial gateway; the above first information includes at least one of the following:

[0370] The time information when the feedback link is available;

[0371] The time information when both the service link and the feedback link are available;

[0372] The time information when the connection between the satellite and the terrestrial gateway is available;

[0373] The time information when the end-to-end connection is available.

[0374] In a possible implementation, the above first information is used to indicate the time when the cell stops service; the above first information includes at least one of the following:

[0375] The time information when the service link is unavailable;

[0376] The time information when the feedback link is unavailable;

[0377] The time information when the cell stops serving the current coverage area.

[0378] In a possible implementation, the above first information is used to indicate the amount of data that the cell can store; the above first information includes at least one of the following:

[0379] The total amount of data that the cell can store information;

[0380] The remaining amount of data that the cell can store information;

[0381] The amount of data that the cell has used to store information.

[0382] In a possible implementation, the above first operation includes at least one of the following: a second operation, a third operation, a fourth operation, a fifth operation, and a sixth operation;

[0383] Among them, the second operation includes at least one of the following:

[0384] Not considering the first cell as a suitable cell;

[0385] Considering the first cell as an acceptable cell;

[0386] Considering the first cell as prohibited;

[0387] Not considering the first cell as a candidate cell for the first operation;

[0388] The third operation includes at least one of the following:

[0389] Considering the serving frequency as the highest-priority frequency;

[0390] Considering the frequencies other than the serving frequency as the lowest-priority frequencies;

[0391] Increasing the priority of the serving frequency by a first offset;

[0392] Decreasing the priority of the frequencies other than the serving frequency by a second offset;

[0393] Increasing the first value of the serving cell by a third offset, where the first value is the cell selection reception level value;

[0394] Increasing the second value of the serving cell by a fourth offset, where the second value is the cell selection quality value;

[0395] Decreasing the third threshold by a fifth offset, where the third threshold is the threshold for the first value used for co-frequency measurement;

[0396] Decreasing the fourth threshold by a sixth offset, where the fourth threshold is the threshold for the second value used for co-frequency measurement;

[0397] Decreasing the fifth threshold by a seventh offset, where the fifth threshold is the threshold for the first value used for inter-frequency or inter-system frequency measurement;

[0398] Decreasing the sixth threshold by an eighth offset, where the sixth threshold is the threshold for the second value used for inter-frequency or inter-system frequency measurement;

[0399] The fourth operation includes at least one of the following:

[0400] Excluding the first cell during the execution of the first operation;

[0401] When the first cell is not the serving cell of the terminal and the frequency of the first cell is the same as the serving frequency, reduce the R value of the first cell by the ninth offset;

[0402] Reduce the first value of the first cell by the tenth offset, where the first value is the cell selection received level value;

[0403] Reduce the second value of the first cell by the eleventh offset, where the second value is the cell selection quality value;

[0404] Increase the first value of the serving cell by the twelfth offset, where the first value is the cell selection received level value;

[0405] Increase the second value of the serving cell by the thirteenth offset, where the second value is the cell selection quality value;

[0406] Increase the seventh threshold by the fourteenth offset, where the seventh threshold is the threshold for the first value used for a higher priority frequency or a higher priority different system frequency;

[0407] Increase the eighth threshold by the fifteenth offset, where the eighth threshold is the threshold for the second value used for a higher priority frequency or a higher priority different system frequency;

[0408] Increase the ninth threshold by the sixteenth offset, where the ninth threshold is the threshold for the first value used for a lower priority frequency or a lower priority different system frequency;

[0409] Increase the tenth threshold by the seventeenth offset, where the tenth threshold is the threshold for the second value used for a lower priority frequency or a lower priority different system frequency;

[0410] Reduce the eleventh threshold by the eighteenth offset, where the eleventh threshold is the threshold for the first value of the serving cell used for a lower priority frequency or a lower priority different system frequency;

[0411] Increase the twelfth threshold by the nineteenth offset, where the twelfth threshold is the threshold for the second value of the serving cell used for a lower priority frequency or a lower priority different system frequency;

[0412] The fifth operation includes not performing an AS operation, where the AS operation is an operation related to any of the following: cell search, cell measurement, cell selection, cell reselection;

[0413] The sixth operation includes at least one of the following:

[0414] Give priority to performing measurements on the frequency of the first cell;

[0415] Give priority to selecting or reselecting the first cell;

[0416] Consider the first cell as a suitable cell.

[0417] In a possible implementation, excluding the first cell during the execution of the first operation includes at least one of the following:

[0418] Not measuring the frequency where the first cell is located;

[0419] Not performing reselection evaluation on the first cell;

[0420] Not considering the first cell as a candidate cell for cell selection or cell reselection.

[0421] In a possible implementation, preferentially performing measurement on the frequency where the first cell is located includes at least one of the following:

[0422] Considering the frequency where the first cell is located as the highest-priority frequency;

[0423] Considering frequencies other than the frequency where the first cell is located as the lowest-priority frequencies;

[0424] Increasing the priority of the frequency where the first cell is located by twenty offsets;

[0425] Decreasing the priority of frequencies other than the frequency where the first cell is located by twenty-one offsets;

[0426] Increasing the third threshold by twenty-two offsets, where the third threshold is the threshold for the first value used for co-frequency measurement;

[0427] Increasing the fourth threshold by twenty-three offsets, where the fourth threshold is the threshold for the second value used for co-frequency measurement;

[0428] Increasing the fifth threshold by twenty-four offsets, where the fifth threshold is the threshold for the first value used for inter-frequency or inter-system frequency measurement;

[0429] Increasing the sixth threshold by twenty-five offsets, where the sixth threshold is the threshold for the second value used for inter-frequency or inter-system frequency measurement.

[0430] In a possible implementation, preferentially selecting or reselecting the first cell includes at least one of the following:

[0431] When the frequency where the first cell is located is different from the serving frequency, preferentially evaluating the first cell;

[0432] When the frequency where the first cell is located is the same as the serving frequency or the priority of the frequency where the first cell is located is equal to the priority of the serving frequency, increasing the R value of the first cell by twenty-six offsets;

[0433] When the frequency of the first cell is the same as the serving frequency or the priority of the frequency of the first cell is equal to the priority of the serving frequency, reduce the R value of other cells except the first cell by a twenty-seventh offset, and the frequencies of other cells are the same as the serving frequency;

[0434] When the frequency of the first cell is the same as the serving frequency or the priority of the frequency of the first cell is equal to the priority of the serving frequency, if the R value of the first cell exceeds a thirteenth threshold, select or reselect the first cell; for example, the first threshold can be a threshold agreed by the protocol or configured by the network-side device, or a value with an offset from the cell with the highest R value, where the offset can be agreed by the protocol or configured by the network-side device;

[0435] Increase the first value of the first cell by a twenty-eighth offset, where the first value is the cell selection received level value;

[0436] Increase the second value of the first cell by a twenty-ninth offset, where the second value is the cell selection quality value;

[0437] When the priority of the frequency of the first cell is higher than the priority of the serving frequency, reduce the seventh threshold by a thirtieth offset, where the seventh threshold is the threshold for the first value of a higher priority frequency or a higher priority inter-system frequency;

[0438] When the priority of the frequency of the first cell is higher than the priority of the serving frequency, reduce the eighth threshold by a thirty-first offset, where the eighth threshold is the threshold for the second value of a higher priority frequency or a higher priority inter-system frequency;

[0439] When the priority of the frequency of the first cell is lower than the priority of the serving frequency, reduce the ninth threshold by a thirty-second offset, where the ninth threshold is the threshold for the first value of a lower priority frequency or a lower priority inter-system frequency;

[0440] When the priority of the frequency of the first cell is lower than the priority of the serving frequency, reduce the tenth threshold by a thirty-third offset, where the tenth threshold is the threshold for the second value of a lower priority frequency or a lower priority inter-system frequency;

[0441] When the priority of the frequency of the first cell is lower than the priority of the serving frequency, increase the eleventh threshold by a thirty-fourth offset, where the eleventh threshold is the threshold for the first value of the serving cell of a lower priority frequency or a lower priority inter-system frequency;

[0442] When the priority of the frequency where the first cell is located is lower than the priority of the serving frequency, increase the twelfth threshold by the thirty-fifth offset, where the twelfth threshold is the threshold for the second value of the serving cell for a lower priority frequency or a lower priority inter-system frequency.

[0443] In a possible implementation, when the terminal is not camped on any cell, the above first operation is the second operation;

[0444] Or,

[0445] When the serving cell of the terminal is the second cell, the above first operation includes at least one of the following: the second operation, the third operation, the fourth operation, the fifth operation, the sixth operation; where the second cell supports the default satellite operation mode;

[0446] Or,

[0447] When the serving cell of the terminal is the third cell, the above first operation includes at least one of the following: the second operation, the third operation, the fourth operation, the fifth operation, the sixth operation; where the third cell supports the store-and-forward satellite operation mode.

[0448] In a possible implementation, when the terminal is not camped on any cell, the first operation is the second operation, including at least one of the following:

[0449] When the first cell only supports the store-and-forward satellite operation mode and the terminal is not camped on any cell, the first operation is the second operation;

[0450] When the first cell only supports the store-and-forward satellite operation mode, meets the first condition and the terminal is not camped on any cell, the first operation is the second operation;

[0451] When the first cell only supports the default satellite operation mode and the terminal is not camped on any cell, the first operation is the second operation;

[0452] When the first cell only supports the default satellite operation mode, meets the second condition and the terminal is not camped on any cell, the first operation is the second operation.

[0453] In a possible implementation, when the serving cell of the terminal is the second cell, the first operation includes at least one of the following: the second operation, the third operation, the fourth operation, the fifth operation, the sixth operation; including at least one of the following:

[0454] When the first cell only supports the store-and-forward satellite operation mode and the serving cell of the terminal is the second cell, the first operation includes at least one of the following: the second operation, the third operation, the fourth operation, the fifth operation;

[0455] When only the store-and-forward satellite operation mode is supported in the first cell, the serving cell of the terminal is the second cell, and the first condition is satisfied, the first operation includes at least one of the following: a second operation, a third operation, a fourth operation, and a fifth operation;

[0456] When the default satellite operation mode is supported in the first cell and the serving cell of the terminal is the second cell, the first operation includes a sixth operation;

[0457] When the default satellite operation mode is supported in the first cell, the serving cell of the terminal is the second cell, and the first condition is satisfied, the first operation includes a sixth operation.

[0458] In a possible implementation, when the serving cell of the terminal is the third cell, the first operation includes at least one of the following: a second operation, a third operation, a fourth operation, a fifth operation, and a sixth operation; including at least one of the following:

[0459] When only the default satellite mode is supported in the first cell and the serving cell of the terminal is the third cell, the first operation includes a second operation, a third operation, a fourth operation, and a fifth operation;

[0460] When only the default satellite mode is supported in the first cell, the serving cell of the terminal is the third cell, and the second condition is satisfied, the first operation includes a second operation, a third operation, a fourth operation, and a fifth operation;

[0461] When the first cell is other than the third cell and the serving cell of the terminal is the third cell, the first operation includes a second operation, a third operation, a fourth operation, and a fifth operation;

[0462] When the first cell is other than the third cell, the serving cell of the terminal is the third cell, and the second condition is satisfied, the first operation includes a second operation, a third operation, a fourth operation, and a fifth operation;

[0463] When the store-and-forward satellite operation mode is supported in the first cell and the serving cell of the terminal is the third cell, the first operation includes a sixth operation;

[0464] When the store-and-forward satellite operation mode is supported in the first cell, the serving cell of the terminal is the third cell, and the second condition is satisfied, the first operation includes a sixth operation.

[0465] In a possible implementation, the first condition includes at least one of the following:

[0466] The terminal does not support operations related to the store-and-forward satellite operation mode;

[0467] The terminal does not initiate services related to store-and-forward;

[0468] The terminal is in the first operating mode, and the first operating mode is that communication can only be performed in a cell that supports the default satellite operating mode;

[0469] The terminal is not in the second operating mode, and the second operating mode is that communication can only be performed in a cell that supports the store-and-forward satellite operating mode;

[0470] The above second condition includes at least one of the following:

[0471] The terminal has initiated a service related to store-and-forward;

[0472] The terminal is initiating a service related to store-and-forward;

[0473] There is a service related to store-and-forward to be initiated;

[0474] The terminal is in the second operating mode, and the second operating mode is that communication can only be performed in a cell that supports the store-and-forward satellite operating mode;

[0475] The terminal is not in the first operating mode, and the first operating mode is that communication can only be performed in a cell that supports the default satellite operating mode;

[0476] The cell where the terminal previously camped or is currently camping supports the store-and-forward satellite operating mode;

[0477] The terminal has initiated an uplink transmission on the cell that supports the store-and-forward satellite operating mode where it previously camped or is currently camping;

[0478] The terminal has successfully established a connection with the cell that supports the store-and-forward satellite operating mode;

[0479] The terminal is waiting for a downlink transmission from the cell that supports the store-and-forward satellite operating mode where it previously camped or is currently camping.

[0480] In a possible implementation, the above first information is used to indicate the satellite operating mode; the execution module 42 is specifically configured to:

[0481] When the first cell only supports the store-and-forward satellite operating mode, perform at least one of the following: the second operation, the third operation, the fourth operation, the fifth operation, the sixth operation;

[0482] Or,

[0483] When the first cell only supports the store-and-forward satellite operating mode and meets the first condition, perform at least one of the following: the second operation, the third operation, the fourth operation, the fifth operation;

[0484] Wherein, the first condition includes at least one of the following:

[0485] The terminal does not support operations related to the store-and-forward satellite operation mode;

[0486] The terminal does not initiate services related to store-and-forward;

[0487] The terminal is in the first operation mode, and the first operation mode is to be able to communicate only in a cell that supports the default satellite operation mode;

[0488] The terminal is not in the second operation mode, and the second operation mode is to be able to communicate only in a cell that supports the store-and-forward satellite operation mode.

[0489] In a possible implementation, the above first information is used to indicate the satellite operation mode; the execution module 42 is specifically configured to:

[0490] When the first cell only supports the default satellite operation mode, perform at least one of the following: the second operation, the third operation, the fourth operation, the fifth operation;

[0491] Or,

[0492] When the first cell only supports the default satellite operation mode and meets the second condition, perform at least one of the following: the second operation, the third operation, the fourth operation, the fifth operation;

[0493] Wherein, the second condition includes at least one of the following:

[0494] The terminal has initiated a service related to store-and-forward;

[0495] The terminal is initiating a service related to store-and-forward;

[0496] There is a service related to store-and-forward to be initiated;

[0497] The terminal is in the second operation mode, and the second operation mode is to be able to communicate only in a cell that supports the store-and-forward satellite operation mode;

[0498] The terminal is not in the first operation mode, and the first operation mode is to be able to communicate only in a cell that supports the default satellite operation mode.

[0499] In a possible implementation, the above first information is used to indicate the satellite operation mode; the execution module 42 is specifically configured to:

[0500] When the first cell is the third cell, perform at least one of the following: the second operation, the third operation, the fourth operation, the fifth operation, the sixth operation;

[0501] Or,

[0502] When the first cell is the third cell and the third condition is satisfied, perform at least one of the following: the second operation, the third operation, the fourth operation, the fifth operation, and the sixth operation;

[0503] Among them, the third cell supports the store-and-forward satellite operation mode; the third condition includes at least one of the following:

[0504] The cell where the terminal previously camped or is currently camping supports the store-and-forward satellite operation mode;

[0505] The terminal initiated an uplink transmission on the cell that previously camped or is currently camping and supports the store-and-forward satellite operation mode;

[0506] The terminal has successfully established a connection with the first cell;

[0507] The terminal is waiting for a downlink transmission from the cell that previously camped or is currently camping and supports the store-and-forward satellite operation mode.

[0508] In a possible implementation, the above first information is used to indicate the time when the satellite connects to the terrestrial gateway; the above execution module 42 is specifically configured to perform the sixth operation when the first information meets the fourth condition;

[0509] Among them, the fourth condition includes at least one of the following:

[0510] The interval between the current time and the time indicated by the first information is less than or equal to the fourteenth threshold;

[0511] The interval between the current time and the time indicated by the first information is the smallest among the neighboring cells of the terminal.

[0512] In a possible implementation, the above first information is used to indicate the time when the satellite connects to the terrestrial gateway; the above execution module 42 is specifically configured to:

[0513] When the interval between the current time and the time indicated by the first information is greater than or equal to the fifteenth threshold, perform at least one of the following: the second operation, the third operation, and the fourth operation;

[0514] Or,

[0515] When the interval between the current time and the time indicated by the first information is greater than or equal to the fifteenth threshold and the second condition is satisfied, perform at least one of the following: the second operation, the third operation, and the fourth operation;

[0516] Among them, the second condition includes at least one of the following:

[0517] The terminal has initiated, is initiating, or is about to initiate a service related to store-and-forward;

[0518] The terminal is in the second operation mode, and the second operation mode is that communication can only be performed in a cell that supports the store-and-forward satellite operation mode;

[0519] The terminal is not in the first operation mode, and the first operation mode is that communication can only be performed in a cell that supports the default satellite operation mode.

[0520] In a possible implementation, the above first information is used to indicate the time when the cell stops service; the above execution module 42 is specifically configured to:

[0521] Perform a sixth operation when the first information meets the fifth condition;

[0522] Or,

[0523] Perform at least one of the following: a second operation, a third operation, and a fourth operation when the interval between the current time and the time indicated by the first information is less than or equal to the sixteenth threshold;

[0524] Among them, the fifth condition includes at least one of the following:

[0525] The interval between the current system time and the time indicated by the first information is greater than or equal to the sixteenth threshold;

[0526] The interval between the current system time and the time indicated by the first information is the largest time interval among the neighboring cells of the terminal.

[0527] In a possible implementation, the above first information is used to indicate the time when the cell stores data; the above execution module 42 is specifically configured to:

[0528] Perform a sixth operation when the first information meets the sixth condition;

[0529] Or,

[0530] Perform at least one of the following: a second operation, a third operation, and a fourth operation when the first information meets the seventh condition;

[0531] Among them, the sixth condition includes at least one of the following:

[0532] The start time for the cell to store data has arrived;

[0533] The end time for the cell to store data has not arrived;

[0534] The seventh condition includes at least one of the following:

[0535] The start time for the cell to store data has not arrived;

[0536] The interval between the current time and the end time for the cell to store data is less than or equal to the seventeenth threshold.

[0537] In a possible implementation, the end time for storing signaling or data in the above cell has not been reached, including:

[0538] The interval between the current time and the end time for storing data in the cell is greater than or equal to the seventeenth threshold;

[0539] The interval between the current system time and the end time for storing signaling or data in the cell is the largest time interval among the neighboring cells of the terminal.

[0540] In a possible implementation, the above first information is used to indicate the amount of data that the cell can store; the execution module 42 is specifically configured to:

[0541] Perform a sixth operation when the first information meets the eighth condition;

[0542] Or,

[0543] Perform at least one of the following: a second operation, a third operation, and a fourth operation when the first information meets the ninth condition;

[0544] Among them, the eighth condition includes at least one of the following:

[0545] The remaining storage space of the cell is greater than or equal to the eighteenth threshold;

[0546] The remaining storage space of the cell is greater than or equal to the first data volume of the terminal;

[0547] The first data volume of the terminal is less than or equal to the first threshold;

[0548] The second data volume of the terminal is greater than or equal to the second threshold;

[0549] The ninth condition includes at least one of the following:

[0550] The remaining storage space of the cell is less than or equal to the eighteenth threshold;

[0551] The remaining storage space of the cell is less than or equal to the first data volume of the terminal;

[0552] Among them, the first data volume includes at least one of the following:

[0553] The available data volume of the terminal;

[0554] The data volume to be sent by the terminal.

[0555] In a possible implementation, the above first information is used to indicate the service types supported by the cell; the execution module 42 is specifically configured to:

[0556] Perform a sixth operation when the service type initiated by the terminal matches the service types supported by the first cell;

[0557] Or,

[0558] When the service type initiated by the terminal does not match the service type supported by the first cell, perform at least one of the following: a second operation, a third operation, and a fourth operation.

[0559] In a possible implementation, the above-mentioned service type initiated by the terminal matching the service type supported by the first cell includes at least one of the following:

[0560] There is an intersection between the service type initiated by the terminal and the service type supported by the first cell;

[0561] The service type initiated by the terminal is a subset of the service type supported by the first cell.

[0562] In a possible implementation, the above-mentioned first information is used to indicate the forwarding priority of the service type supported by the cell; the above-mentioned execution module 42 is specifically used for any one of the following:

[0563] When the forwarding priority corresponding to the service type initiated by the terminal is higher than or equal to the nineteenth threshold, perform a sixth operation;

[0564] When the forwarding priority corresponding to the service type initiated by the terminal is the highest priority, perform a sixth operation;

[0565] When the forwarding priority corresponding to the service type initiated by the terminal is lower than or equal to the nineteenth threshold, perform at least one of the following: a second operation, a third operation, and a fourth operation;

[0566] When the forwarding priority corresponding to the service type that the terminal is initiating, about to initiate, or has initiated is the lowest priority, perform at least one of the following: a second operation, a third operation, and a fourth operation.

[0567] In a possible implementation, the above-mentioned acquisition module 41 is specifically used for:

[0568] Receive a system message from the first cell, where the system message includes the first information;

[0569] Or,

[0570] Receive a system message from the fourth cell, where the fourth cell is the serving cell of the terminal and the first cell is the neighboring cell of the terminal, and the system message includes the first information.

[0571] In a possible implementation, the above-mentioned execution module 42 is specifically used to perform a first operation in a first area based on the first information; where the first area includes at least one of the following:

[0572] An area indicated by at least one tracking area identifier;

[0573] An area indicated by at least one tracking area code;

[0574] At least one geographical area.

[0575] An embodiment of the present application provides a cell selection device. In a case where a cell supporting a default satellite operation mode coexists with a cell supporting a store-and-forward satellite operation mode, the cell selection device can utilize the relevant information of the first cell to perform operations related to cell selection or reselection, so that the cell selection device can select or reselect to a suitable cell, thereby ensuring the communication reliability of the cell selection device.

[0576] The cell selection device in the embodiment of the present application can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal or other devices other than the terminal. Exemplarily, the terminal can include, but is not limited to, the types of the above-listed terminal 11, and other devices can be a server, a Network Attached Storage (NAS), etc., which are not specifically limited in the embodiment of the present application.

[0577] The cell selection device provided by the embodiment of the present application can implement each process implemented by the above-mentioned cell selection method embodiment and achieve the same technical effect. To avoid repetition, it will not be elaborated here.

[0578] Figure 6 Shows a possible structural schematic diagram of the cell selection device involved in the embodiment of the present application. As Figure 6 shown, the cell selection device 50 may include: a sending module 51.

[0579] Among them, the sending module 51 is configured to send first information of a first cell to a terminal. The first information is used to perform a first operation, and the first operation is an operation related to cell selection or cell reselection; the first information is used to indicate at least one of the following: the satellite operation mode of the cell; the time when the satellite is connected to the ground gateway; the time when the cell stops service; the time when the cell stores data; the amount of data that the cell can store; a first threshold, where the first threshold is related to the maximum first data amount of the cell that the terminal can select or reselect; a second threshold, where the second threshold is related to the minimum first data amount of the cell that the terminal can select or reselect; the service types supported by the cell; the forwarding priority of the service types supported by the cell; where the first data amount includes at least one of the following: the data amount available to the terminal; the data amount to be sent by the terminal.

[0580] In a possible implementation, the above-mentioned first information is used to indicate the satellite operation mode, and the satellite operation mode includes at least one of the following: default satellite operation mode, store-and-forward satellite operation mode;

[0581] Among them, the default satellite operation mode includes at least one of the following:

[0582] Both the serving link and the feedback link of the cell are available;

[0583] The connection between the satellite and the terrestrial gateway is available;

[0584] The cell supports end-to-end connection;

[0585] The store-and-forward satellite operation mode includes at least one of the following:

[0586] The serving link of the cell is available, and the feedback link of the cell is unavailable;

[0587] The connection between the satellite and the terrestrial gateway is unavailable;

[0588] The cell only supports the connection from the terminal to the satellite;

[0589] The cell does not support end-to-end connection.

[0590] In a possible implementation, the above-mentioned first information is used to indicate the time when the satellite is connected to the terrestrial gateway; the above-mentioned first information includes at least one of the following:

[0591] Time information when the feedback link is available;

[0592] Time information when both the serving link and the feedback link are available;

[0593] Time information when the connection between the satellite and the terrestrial gateway is available;

[0594] Time information when the end-to-end connection is available.

[0595] In a possible implementation, the above-mentioned first information is used to indicate the time when the cell stops service; the above-mentioned first information includes at least one of the following:

[0596] Time information when the serving link is unavailable;

[0597] Time information when the feedback link is unavailable;

[0598] Time information when the cell stops serving the current coverage area.

[0599] In a possible implementation, the above-mentioned first information is used to indicate the amount of data that the cell can store; the above-mentioned first information includes at least one of the following:

[0600] Total amount of data that the cell can store information;

[0601] The remaining storable data volume information of the cell;

[0602] The used storable data volume information of the cell.

[0603] The embodiments of the present application provide a cell selection device. In the case where a cell supporting the default satellite operation mode coexists with a cell supporting the store-and-forward satellite operation mode, the cell selection device can send the relevant information of the first cell to the terminal, so that the terminal can perform operations related to cell selection or reselection based on the relevant information of the first cell, enabling the terminal to select or reselect a suitable cell, thereby ensuring the communication reliability of the terminal.

[0604] The cell selection device provided by the embodiments of the present application can implement each process implemented by the above-mentioned cell selection method embodiments and achieve the same technical effects. To avoid repetition, details are not described here again.

[0605] As Figure 7 shown, the embodiments of the present application further provide a communication device 5000, including a processor 5001 and a memory 5002. A program or instruction that can run on the processor 5001 is stored on the memory 5002. For example, when the communication device 5000 is a terminal, when the program or instruction is executed by the processor 5001, each step of the above-mentioned terminal-side method embodiments is implemented, and the same technical effects can be achieved. To avoid repetition, details are not described here again. When the communication device 5000 is a network-side device, when the program or instruction is executed by the processor 5001, each step of the above-mentioned network-side device method embodiments is implemented, and the same technical effects can be achieved. To avoid repetition, details are not described here again.

[0606] The embodiments of the present application further provide a terminal, including a processor and a communication interface. The communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the steps in the above-mentioned cell selection method embodiments. This terminal embodiment corresponds to the above-mentioned terminal-side method embodiments. Each implementation process and implementation manner of the above-mentioned method embodiments can be applied to this terminal embodiment, and the same technical effects can be achieved. Specifically, Figure 8 FIG. is a schematic hardware structure diagram of a terminal for implementing the embodiments of the present application.

[0607] The terminal 7000 includes, but is not limited to, at least some components such as a radio frequency unit 7001, a network module 7002, an audio output unit 7003, an input unit 7004, a sensor 7005, a display unit 7006, a user input unit 7007, an interface unit 7008, a memory 7009, and a processor 7010.

[0608] Those skilled in the art can understand that the terminal 7000 may further include a power source (such as a battery) for powering each component. The power source can be logically connected to the processor 7010 through a power management system, so as to implement functions such as management of charging, discharging, and power consumption management through the power management system. Figure 8 The terminal structure shown in Figure 8 does not limit the terminal. The terminal may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0609] It should be understood that in the embodiments of the present application, the input unit 7004 may include a graphics processing unit (GPU) 70041 and a microphone 70042. The graphics processor 70041 processes the image data of static pictures or videos obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 7006 may include a display panel 70061, and the display panel 70061 can be configured in the form of, for example, a liquid crystal display, an organic light emitting diode, etc. The user input unit 7007 includes at least one of a touch panel 70071 and other input devices 70072. The touch panel 70071 is also called a touch screen. The touch panel 70071 can include two parts: a touch detection device and a touch controller. The other input devices 70072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, which will not be elaborated here.

[0610] In the embodiments of the present application, after the radio frequency unit 7001 receives downlink data from a network side device, it can be transmitted to the processor 7010 for processing; in addition, the radio frequency unit 7001 can send uplink data to the network side device. Generally, the radio frequency unit 7001 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0611] The memory 7009 can be used to store software programs or instructions and various data. The memory 7009 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data. Among them, the first storage area may store an operating system, application programs or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 7009 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable ROM (PROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static RAM (SRAM), a dynamic RAM (DRAM), a synchronous DRAM (SDRAM), a double data rate SDRAM (DDR SDRAM), an enhanced SDRAM (ESDRAM), a synch link DRAM (SLDRAM), and a direct rambus RAM (DRRAM). The memory 7009 in the embodiments of the present application includes but is not limited to these and any other suitable types of memories.

[0612] The processor 7010 may include one or more processing units; optionally, the processor 7010 integrates an application processor and a modem processor. Among them, the application processor mainly processes operations related to the operating system, user interface, and application programs, etc., and the modem processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above-mentioned modem processor may not be integrated into the processor 7010 either.

[0613] The terminal provided by the embodiments of the present application can implement each process implemented by the above method embodiments and achieve the same technical effects. The implementation processes of the implementation manners mentioned in this embodiment can refer to the relevant descriptions of the above cell selection method embodiments. To avoid repetition, they will not be elaborated here.

[0614] The embodiments of the present application further provide a network-side device, including a processor and a communication interface. The communication interface is coupled to the processor, and the processor is configured to run programs or instructions to implement the steps of the above-mentioned embodiments of the cell selection method. This embodiment of the network-side device corresponds to the above-mentioned embodiment of the network-side device method. Each implementation process and implementation manner of the above method embodiment can be applied to this embodiment of the network-side device and can achieve the same technical effect.

[0615] Specifically, the embodiments of the present application further provide a network-side device. As Figure 9 shown, the network-side device 600 includes: an antenna 61, a radio frequency device 62, a baseband device 63, a processor 64, and a memory 65. The antenna 61 is connected to the radio frequency device 62. In the uplink direction, the radio frequency device 62 receives information through the antenna 61 and sends the received information to the baseband device 63 for processing. In the downlink direction, the baseband device 63 processes the information to be sent and sends it to the radio frequency device 62. The radio frequency device 62 processes the received information and then sends it out through the antenna 61.

[0616] The method executed by the network-side device in the above embodiments can be implemented in the baseband device 63, and the baseband device 63 includes a baseband processor.

[0617] The baseband device 63 may include, for example, at least one baseband board, and a plurality of chips are provided on the baseband board. As Figure 9 shown, one of the chips is, for example, a baseband processor, which is connected to the memory 65 through a bus interface to call the program in the memory 65 and execute the operations of the network-side device shown in the above method embodiments.

[0618] The network-side device may further include a network interface 66, and this interface is, for example, a Common Public Radio Interface (CPRI).

[0619] Specifically, the network-side device 600 in the embodiments of the present invention further includes: instructions or programs stored on the memory 65 and executable on the processor 64. The processor 64 calls the instructions or programs in the memory 65 to execute the methods executed by the modules shown in the above cell selection device and achieves the same technical effect. To avoid repetition, it will not be elaborated here.

[0620] The embodiments of the present application further provide a readable storage medium, on which programs or instructions are stored. When the programs or instructions are executed by a processor, they implement each process of the above-mentioned embodiments of the cell selection method and can achieve the same technical effect. To avoid repetition, it will not be elaborated here.

[0621] Among them, the processor is the processor in the terminal described in the foregoing embodiment. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disc, etc. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0622] Another embodiment of the present application provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is configured to run programs or instructions to implement each process of the foregoing embodiment of the cell selection method, and can achieve the same technical effects. To avoid repetition, details are not described herein again.

[0623] It should be understood that the chip mentioned in the embodiments of the present application may also be referred to as a system-on-chip, system chip, chip system, or system-on-chip.

[0624] Another embodiment of the present application provides a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to implement each process of the foregoing embodiment of the cell selection method, and can achieve the same technical effects. To avoid repetition, details are not described herein again.

[0625] Another embodiment of the present application provides a wireless communication system, including: a terminal and a network-side device. The terminal can be used to execute the steps of the foregoing cell selection method, and the network-side device can be used to execute the steps of the foregoing cell selection method.

[0626] It should be noted that in this article, the term "comprising", "including" or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including that element. In addition, it should be pointed out 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 a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0627] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-described example methods can be implemented by means of a computer software product plus a necessary general hardware platform, and of course, they can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes several instructions for causing a terminal or a network-side device to execute the methods described in various embodiments of the present application.

[0628] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms of embodiments without departing from the purpose of the present application and the scope protected by the claims. These embodiments are all within the protection scope of the present application.

Claims

1. A cell selection method, characterized in that including: The terminal obtains first information of a first cell; Based on the first information, the terminal performs a first operation; wherein, the first operation is an operation related to cell selection or cell reselection; the first information is used to indicate at least one of the following: The satellite operation mode of the cell; The time when the satellite is connected to the terrestrial gateway; The time when the cell stops service; The time when the cell stores data; The amount of data that the cell can store; A first threshold, which is related to the maximum first data amount that the terminal can select or reselect a cell; A second threshold, which is related to the minimum first data amount that the terminal can select or reselect a cell; The service types supported by the cell; The forwarding priority of the service types supported by the cell; Wherein, the first data amount includes at least one of the following: The amount of data available to the terminal; The amount of data to be sent by the terminal.

2. The method according to claim 1, wherein The first information is used to indicate the satellite operation mode, and the satellite operation mode includes at least one of the following: the default satellite operation mode, the store-and-forward satellite operation mode; Wherein, the default satellite operation mode includes at least one of the following: Both the service link and the feedback link of the cell are available; The connection between the satellite and the terrestrial gateway is available; The cell supports end-to-end connection; The store-and-forward satellite operation mode includes at least one of the following: The service link of the cell is available, and the feedback link of the cell is unavailable; The connection between the satellite and the terrestrial gateway is unavailable; The cell only supports the connection from the terminal to the satellite; The cell does not support end-to-end connection.

3. The method according to claim 1, characterized in that, The first information is used to indicate the time when the satellite is connected to the terrestrial gateway; The first information includes at least one of the following: The time information when the feedback link is available; The time information when both the service link and the feedback link are available; The time information when the connection between the satellite and the terrestrial gateway is available; The time information when the end-to-end connection is available.

4. The method according to claim 1, characterized in that, The first information is used to indicate the time when the cell stops service; The first information includes at least one of the following: The time information when the service link is unavailable; The time information when the feedback link is unavailable; The time information when the cell stops serving the current coverage area.

5. The method according to claim 1, characterized in that The first information is used to indicate the amount of data that the cell can store; The first information includes at least one of the following: The total amount of data that the cell can store information; The remaining amount of data that the cell can store information; The amount of data that the cell has used for storage information.

6. The method according to any one of claims 1 to 5, characterized in that The first operation includes at least one of the following: a second operation, a third operation, a fourth operation, a fifth operation, a sixth operation; Wherein, the second operation includes at least one of the following: Not considering the first cell as a suitable cell; Considering the first cell as an acceptable cell; Considering the first cell as prohibited; Not considering the first cell as a candidate cell for the first operation; The third operation includes at least one of the following: Considering the service frequency as the frequency with the highest priority; Considering the frequencies other than the service frequency as the frequencies with the lowest priority; Increasing the priority of the service frequency by a first offset; Decreasing the priority of the frequencies other than the service frequency by a second offset; Increasing the first value of the serving cell by a third offset, where the first value is the cell selection reception level value; Increase the second value of the serving cell by a fourth offset, where the second value is the cell selection quality value; Decrease the third threshold by a fifth offset, where the third threshold is the threshold for the first value used for co-frequency measurement; Decrease the fourth threshold by a sixth offset, where the fourth threshold is the threshold for the second value used for co-frequency measurement; Decrease the fifth threshold by a seventh offset, where the fifth threshold is the threshold for the first value used for inter-frequency or inter-system frequency measurement; Decrease the sixth threshold by an eighth offset, where the sixth threshold is the threshold for the second value used for inter-frequency or inter-system frequency measurement; The fourth operation includes at least one of the following: Exclude the first cell during the execution of the first operation; When the first cell is not the serving cell of the terminal and the frequency where the first cell is located is the same as the serving frequency, decrease the R value of the first cell by a ninth offset; Decrease the first value of the first cell by a tenth offset, where the first value is the cell selection received signal level value; Decrease the second value of the first cell by an eleventh offset, where the second value is the cell selection quality value; Increase the first value of the serving cell by a twelfth offset, where the first value is the cell selection received signal level value; Increase the second value of the serving cell by a thirteenth offset, where the second value is the cell selection quality value; Increase the seventh threshold by a fourteenth offset, where the seventh threshold is the threshold for the first value used for a higher priority frequency or a higher priority inter-system frequency; Increase the eighth threshold by a fifteenth offset, where the eighth threshold is the threshold for the second value used for a higher priority frequency or a higher priority inter-system frequency; Increase the ninth threshold by a sixteenth offset, where the ninth threshold is the threshold for the first value used for a lower priority frequency or a lower priority inter-system frequency; Increase the tenth threshold by a seventeenth offset, where the tenth threshold is the threshold for the second value used for a lower priority frequency or a lower priority inter-system frequency; Decrease the eleventh threshold by an eighteenth offset, where the eleventh threshold is the threshold for the first value of the serving cell used for a lower priority frequency or a lower priority inter-system frequency; Increase the twelfth threshold by a nineteenth offset, where the twelfth threshold is the threshold for the second value of the serving cell used for a lower priority frequency or a lower priority inter-system frequency; The fifth operation includes not performing an access stratum (AS) operation, where the AS operation is an operation related to any one of the following: cell search, cell measurement, cell selection, cell reselection; The sixth operation includes at least one of the following: Give priority to performing measurements on the frequency where the first cell is located; Give priority to selecting or reselecting the first cell; Consider the first cell as a suitable cell.

7. The method according to claim 6, wherein Excluding the first cell during the execution of the first operation includes at least one of the following: Do not measure the frequency where the first cell is located; Do not perform reselection evaluation on the first cell; Do not consider the first cell as a candidate cell for cell selection or cell reselection.

8. The method according to claim 6, wherein Giving priority to performing measurements on the frequency where the first cell is located includes at least one of the following: Consider the frequency of the first cell as the highest priority frequency; Consider the frequencies other than the frequency of the first cell as the lowest priority frequencies; Increase the priority of the frequency of the first cell by twenty offset values; Decrease the priority of the frequencies other than the frequency of the first cell by twenty-one offset values; Increase the third threshold by twenty-two offset values, where the third threshold is the threshold for the first value used for co-frequency measurement; Increase the fourth threshold by twenty-three offset values, where the fourth threshold is the threshold for the second value used for co-frequency measurement; Increase the fifth threshold by twenty-four offset values, where the fifth threshold is the threshold for the first value used for inter-frequency or inter-system frequency measurement; Increase the sixth threshold by twenty-five offset values, where the sixth threshold is the threshold for the second value used for inter-frequency or inter-system frequency measurement.

9. The method according to claim 6, wherein Preferentially select or reselect the first cell, including at least one of the following: When the frequency of the first cell is different from the serving frequency, preferentially evaluate the first cell; When the frequency of the first cell is the same as the serving frequency or the priority of the frequency of the first cell is equal to the priority of the serving frequency, increase the R value of the first cell by twenty-six offset values; When the frequency of the first cell is the same as the serving frequency or the priority of the frequency of the first cell is equal to the priority of the serving frequency, decrease the R value of the other cells except the first cell by twenty-seven offset values, where the frequencies of the other cells are the same as the serving frequency; When the frequency of the first cell is the same as the serving frequency or the priority of the frequency of the first cell is equal to the priority of the serving frequency, if the R value of the first cell exceeds the thirteenth threshold, select or reselect the first cell; Increase the first value of the first cell by twenty-eight offset values, where the first value is the cell selection received signal level value; Increase the second value of the first cell by twenty-nine offset values, where the second value is the cell selection quality value; When the priority of the frequency of the first cell is higher than the priority of the serving frequency, decrease the seventh threshold by thirty offset values, where the seventh threshold is the threshold for the first value used for higher priority frequency or higher priority inter-system frequency; When the priority of the frequency of the first cell is higher than the priority of the serving frequency, decrease the eighth threshold by thirty-one offset values, where the eighth threshold is the threshold for the second value used for higher priority frequency or higher priority inter-system frequency; When the priority of the frequency of the first cell is lower than the priority of the serving frequency, decrease the ninth threshold by thirty-two offset values, where the ninth threshold is the threshold for the first value used for lower priority frequency or lower priority inter-system frequency; When the priority of the frequency of the first cell is lower than the priority of the serving frequency, decrease the tenth threshold by thirty-three offset values, where the tenth threshold is the threshold for the second value used for lower priority frequency or lower priority inter-system frequency; When the priority of the frequency where the first cell is located is lower than the priority of the serving frequency, increase the eleventh threshold by the thirty-fourth offset, where the eleventh threshold is the threshold for the first value of the serving cell of a lower priority frequency or a lower priority inter-system frequency; When the priority of the frequency where the first cell is located is lower than the priority of the serving frequency, increase the twelfth threshold by the thirty-fifth offset, where the twelfth threshold is the threshold for the second value of the serving cell of a lower priority frequency or a lower priority inter-system frequency.

10. The method according to any one of claims 6 to 9, characterized in that When the terminal is not camped on any cell, the first operation is the second operation; Or, When the serving cell of the terminal is the second cell, the first operation includes at least one of the following: the second operation, the third operation, the fourth operation, the fifth operation, the sixth operation; The second cell supports the default satellite operation mode; Or, When the serving cell of the terminal is the third cell, the first operation includes at least one of the following: the second operation, the third operation, the fourth operation, the fifth operation, the sixth operation; wherein, the third cell supports the store-and-forward satellite operation mode.

11. The method according to claim 10, characterized in that, When the terminal is not camped on any cell, the first operation being the second operation includes at least one of the following: When the first cell only supports the store-and-forward satellite operation mode and the terminal is not camped on any cell, the first operation is the second operation; When the first cell only supports the store-and-forward satellite operation mode, meets the first condition and the terminal is not camped on any cell, the first operation is the second operation; When the first cell only supports the default satellite operation mode and the terminal is not camped on any cell, the first operation is the second operation; When the first cell only supports the default satellite operation mode, meets the second condition and the terminal is not camped on any cell, the first operation is the second operation.

12. The method according to claim 10, wherein When the serving cell of the terminal is the second cell, the first operation includes at least one of the following: the second operation, the third operation, the fourth operation, the fifth operation, the sixth operation; Includes at least one of the following: When the first cell only supports the store-and-forward satellite operation mode and the serving cell of the terminal is the second cell, the first operation includes at least one of the following: the second operation, the third operation, the fourth operation, the fifth operation; When the first cell only supports the store-and-forward satellite operation mode, the serving cell of the terminal is the second cell and meets the first condition, the first operation includes at least one of the following: the second operation, the third operation, the fourth operation, the fifth operation; When the first cell supports the default satellite operation mode and the serving cell of the terminal is the second cell, the first operation includes the sixth operation; When the first cell supports the default satellite operation mode, the serving cell of the terminal is the second cell, and the first condition is met, the first operation includes the sixth operation.

13. The method according to claim 10, wherein When the serving cell of the terminal is the third cell, the first operation includes at least one of the following: the second operation, the third operation, the fourth operation, the fifth operation, and the sixth operation. Includes at least one of the following: When the first cell only supports the default satellite mode and the serving cell of the terminal is the third cell, the first operation includes the second operation, the third operation, the fourth operation, and the fifth operation. When the first cell only supports the default satellite mode, the serving cell of the terminal is the third cell, and the second condition is met, the first operation includes the second operation, the third operation, the fourth operation, and the fifth operation. When the first cell is a cell other than the third cell and the serving cell of the terminal is the third cell, the first operation includes the second operation, the third operation, the fourth operation, and the fifth operation. When the first cell is a cell other than the third cell, the serving cell of the terminal is the third cell, and the second condition is met, the first operation includes the second operation, the third operation, the fourth operation, and the fifth operation. When the first cell supports the store-and-forward satellite operation mode and the serving cell of the terminal is the third cell, the first operation includes the sixth operation. When the first cell supports the store-and-forward satellite operation mode, the serving cell of the terminal is the third cell, and the second condition is met, the first operation includes the sixth operation.

14. The method according to any one of claims 11 to 13, characterized in that The first condition includes at least one of the following: The terminal does not support the operations related to the store-and-forward satellite operation mode. The terminal does not initiate services related to store-and-forward. The terminal is in the first operation mode, and the first operation mode is that communication can only be performed in a cell that supports the default satellite operation mode. The terminal is not in the second operation mode, and the second operation mode is that communication can only be performed in a cell that supports the store-and-forward satellite operation mode. The second condition includes at least one of the following: The terminal has initiated services related to store-and-forward. The terminal is initiating services related to store-and-forward. There are services related to store-and-forward pending initiation. The terminal is in the second operation mode, and the second operation mode is that communication can only be performed in a cell that supports the store-and-forward satellite operation mode. The terminal is not in the first operation mode, and the first operation mode is that communication can only be performed in a cell that supports the default satellite operation mode. The cell where the terminal previously camped or is currently camping supports the store-and-forward satellite operation mode. The terminal has initiated an uplink transmission on the cell that supports the store-and-forward satellite operation mode where it previously camped or is currently camping. The terminal has successfully established a connection with the cell that supports the store-and-forward satellite operation mode. The terminal is waiting for a downlink transmission from the cell that supported the store-and-forward satellite operation mode during previous or current residency.

15. The method according to any one of claims 6 to 14, characterized in that The first information is used to indicate the time when the satellite is connected to the terrestrial gateway; Based on the first information, the terminal performs a first operation, including: When the first information meets a fourth condition, the terminal performs the sixth operation; Wherein, the fourth condition includes at least one of the following: The interval between the current time and the time indicated by the first information is less than or equal to a fourteenth threshold; The interval between the current time and the time indicated by the first information is the smallest among the neighboring cells of the terminal.

16. The method according to any one of claims 6 to 14, characterized in that, The first information is used to indicate the time when the satellite is connected to the terrestrial gateway; Based on the first information, the terminal performs a first operation, including: When the interval between the current time and the time indicated by the first information is greater than or equal to a fifteenth threshold, the terminal performs at least one of the following: the second operation, the third operation, and the fourth operation; Or, When the interval between the current time and the time indicated by the first information is greater than or equal to a fifteenth threshold and meets a second condition, the terminal performs at least one of the following: the second operation, the third operation, and the fourth operation; Wherein, the second condition includes at least one of the following: The terminal has initiated, is initiating, or is to initiate a service related to store-and-forward; The terminal is in a second operation mode, and the second operation mode is that communication can only be performed in a cell that supports the store-and-forward satellite operation mode; The terminal is not in a first operation mode, and the first operation mode is that communication can only be performed in a cell that supports the default satellite operation mode.

17. The method according to any one of claims 6 to 14, characterized in that The first information is used to indicate the time when the cell stops service; Based on the first information, the terminal performs a first operation, including: When the first information meets a fifth condition, the terminal performs the sixth operation; Or, When the interval between the current time and the time indicated by the first information is less than or equal to a sixteenth threshold, the terminal performs at least one of the following: the second operation, the third operation, and the fourth operation; Wherein, the fifth condition includes at least one of the following: The interval between the current system time and the time indicated by the first information is greater than or equal to a sixteenth threshold; The interval between the current system time and the time indicated by the first information is the largest among the neighboring cells of the terminal.

18. The method according to any one of claims 6 to 14, characterized in that The first information is used to indicate the time when the cell stores data; Based on the first information, the terminal performs a first operation, including: When the first information meets a sixth condition, the terminal performs the sixth operation; Or, When the first information meets a seventh condition, the terminal performs at least one of the following: the second operation, the third operation, and the fourth operation; Wherein, the sixth condition includes at least one of the following: The start time of the cell storing data has arrived; The end time of the cell storing data has not arrived; The seventh condition includes at least one of the following: The start time of the cell storing data has not arrived; The interval between the current time and the end time of the cell storing signaling or data is less than or equal to the seventeenth threshold.

19. The method according to claim 18, wherein The end time of the cell storing signaling or data has not been reached, including: The interval between the current time and the end time of the cell storing data is greater than or equal to the seventeenth threshold; The interval between the current system time and the end time of the cell storing signaling or data is the largest time interval among the neighboring cells of the terminal.

20. The method according to any one of claims 6 to 14, characterized in that The first information is used to indicate the amount of data that the cell can store; Based on the first information, the terminal performs a first operation, including: When the first information meets the eighth condition, the terminal performs the sixth operation; Or, When the first information meets the ninth condition, the terminal performs at least one of the following: the second operation, the third operation, the fourth operation; Wherein, the eighth condition includes at least one of the following: The remaining storage space of the cell is greater than or equal to the eighteenth threshold; The remaining storage space of the cell is greater than or equal to the first data volume of the terminal; The first data volume of the terminal is less than or equal to the first threshold; The second data volume of the terminal is greater than or equal to the second threshold; The ninth condition includes at least one of the following: The remaining storage space of the cell is less than or equal to the eighteenth threshold; The remaining storage space of the cell is less than or equal to the first data volume of the terminal; Wherein, the first data volume includes at least one of the following: The available data volume of the terminal; The data volume to be sent by the terminal.

21. The method according to any one of claims 6 to 14, characterized in that, The first information is used to indicate the service type supported by the cell; Based on the first information, the terminal performs a first operation, including: When the service type initiated by the terminal matches the service type supported by the first cell, the terminal performs the sixth operation; Or, When the service type initiated by the terminal does not match the service type supported by the first cell, the terminal performs at least one of the following: the second operation, the third operation, the fourth operation.

22. The method according to claim 21, characterized in that, The service type initiated by the terminal matches the service type supported by the first cell, including at least one of the following: There is an intersection between the service type initiated by the terminal and the service type supported by the first cell; The service type initiated by the terminal is a subset of the service type supported by the first cell.

23. The method according to any one of claims 6 to 14, characterized in that The first information is used to indicate the forwarding priority of the service type supported by the cell; Based on the first information, the terminal performs a first operation, including any one of the following: When the forwarding priority corresponding to the service type initiated by the terminal is higher than or equal to the nineteenth threshold, the terminal performs the sixth operation; When the forwarding priority corresponding to the service type initiated by the terminal is the highest priority, the terminal performs the sixth operation; When the forwarding priority corresponding to the service type initiated by the terminal is lower than or equal to the nineteenth threshold, the terminal performs at least one of the following: the second operation, the third operation, the fourth operation; When the forwarding priority corresponding to the service type being initiated, to be initiated, or already initiated by the terminal is the lowest priority, the terminal performs at least one of the following: the second operation, the third operation, and the fourth operation.

24. The method according to any one of claims 1 to 23, characterized in that, The terminal obtains first information of a first cell, including: The terminal receives a system message from the first cell, and the first information is included in the system message; Or, The terminal receives a system message from a fourth cell, where the fourth cell is the serving cell of the terminal and the first cell is a neighboring cell of the terminal, and the first information is included in the system message.

25. The method according to any one of claims 1 to 24, characterized in that, Based on the first information, the terminal performs a first operation, including: Based on the first information, the terminal performs the first operation in a first area; where the first area includes at least one of the following: An area indicated by at least one tracking area identifier; An area indicated by at least one tracking area code; At least one geographical area.

26. A cell selection method, characterized in that, Including: The network side device sends the first information of the first cell to the terminal, and the first information is used to perform a first operation, and the first operation is an operation related to cell selection or cell reselection; The first information is used to indicate at least one of the following: The satellite operation mode of the cell; The time when the satellite is connected to the terrestrial gateway; The time when the cell stops service; The time when the cell stores data; The amount of data that the cell can store; A first threshold, where the first threshold is related to the maximum first data volume that the terminal can select or reselect a cell; A second threshold, where the second threshold is related to the minimum first data volume that the terminal can select or reselect a cell; The service types supported by the cell; The forwarding priority of the service types supported by the cell; Wherein, the first data volume includes at least one of the following: The data volume available to the terminal; The data volume to be sent by the terminal.

27. The method according to claim 26, wherein The first information is used to indicate the satellite operation mode, and the satellite operation mode includes at least one of the following: the default satellite operation mode, the store-and-forward satellite operation mode; Wherein, the default satellite operation mode includes at least one of the following: Both the service link and the feedback link of the cell are available; The connection between the satellite and the terrestrial gateway is available; The cell supports end-to-end connection; The store-and-forward satellite operation mode includes at least one of the following: The service link of the cell is available, and the feedback link of the cell is unavailable; The connection between the satellite and the terrestrial gateway is unavailable; The cell only supports the connection from the terminal to the satellite; The cell does not support end-to-end connection.

28. The method according to claim 26, wherein The first information is used to indicate the time when the satellite is connected to the terrestrial gateway; The first information includes at least one of the following: The time information when the feedback link is available; The time information when both the service link and the feedback link are available; The time information when the connection between the satellite and the terrestrial gateway is available; The time information when the end-to-end connection is available.

29. The method according to claim 26, wherein The first information is used to indicate the time when the cell stops service; The first information includes at least one of the following: The time information when the service link is unavailable; The time information when the feedback link is unavailable; The time information when the cell stops serving the current coverage area.

30. The method according to claim 26, wherein The first information is used to indicate the amount of data that the cell can store; The first information includes at least one of the following: Information on the total amount of data that can be stored in the cell; Information on the remaining amount of data that can be stored in the cell; Information on the amount of data that has been used for storage in the cell.

31. A cell selection device, characterized in that, Including: An acquisition module and an execution module; The acquisition module is configured to acquire first information of a first cell; The execution module is configured to perform a first operation based on the first information acquired by the acquisition module; wherein, the first operation is an operation related to cell selection or cell reselection; the first information is used to indicate at least one of the following: The satellite operation mode of the cell; The time when the satellite is connected to the ground gateway; The time when the cell stops providing services; The time when the cell stores data; The amount of data that the cell can store; A first threshold, where the first threshold is related to the maximum first data amount of the cells that the terminal can select or reselect; A second threshold, where the second threshold is related to the minimum first data amount of the cells that the terminal can select or reselect; The service types supported by the cell; The forwarding priority of the service types supported by the cell; Wherein, the first data amount includes at least one of the following: The amount of data available to the terminal; The amount of data to be sent by the terminal.

32. A cell selection device, characterized in that, Including: A sending module; The sending module is configured to send the first information of the first cell to the terminal, where the first information is used to perform a first operation, and the first operation is an operation related to cell selection or cell reselection; the first information is used to indicate at least one of the following: The satellite operation mode of the cell; The time when the satellite is connected to the ground gateway; The time when the cell stops providing services; The time when the cell stores data; The amount of data that the cell can store; A first threshold, where the first threshold is related to the maximum first data amount of the cells that the terminal can select or reselect; A second threshold, where the second threshold is related to the minimum first data amount of the cells that the terminal can select or reselect; The service types supported by the cell; The forwarding priority of the service types supported by the cell; Wherein, the first data amount includes at least one of the following: The amount of data available to the terminal; The amount of data to be sent by the terminal.

33. A terminal, characterized in that, Including a processor and a memory, where 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 cell selection method as described in any one of claims 1 to 25 are implemented.

34. A network-side device, characterized in that, Including a processor and a memory, where 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 cell selection method as described in any one of claims 26 to 30 are implemented.

35. A readable storage medium, characterized in that, A program or instruction is stored on the readable storage medium, and when the program or instruction is executed by a processor, the steps of the cell selection method as described in any one of claims 1 to 25 are implemented, or the steps of the cell selection method as described in any one of claims 26 to 30 are implemented.

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