WO2024055981A1 - 选网方法、发送方法、通信装置及计算机可读存储介质 - Google Patents

选网方法、发送方法、通信装置及计算机可读存储介质 Download PDF

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Publication number
WO2024055981A1
WO2024055981A1 PCT/CN2023/118485 CN2023118485W WO2024055981A1 WO 2024055981 A1 WO2024055981 A1 WO 2024055981A1 CN 2023118485 W CN2023118485 W CN 2023118485W WO 2024055981 A1 WO2024055981 A1 WO 2024055981A1
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Prior art keywords
network
network selection
information
terminal device
reference information
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PCT/CN2023/118485
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English (en)
French (fr)
Inventor
赵玲
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北京紫光展锐通信技术有限公司
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Publication of WO2024055981A1 publication Critical patent/WO2024055981A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service

Definitions

  • the present application relates to the field of communication technology, and in particular to a network selection method, a sending method, a communication device and a computer-readable storage medium.
  • Terminal devices can communicate by accessing the network. However, the terminal device is mobile. When the terminal device enters an area without network coverage, the terminal device cannot communicate, which may easily cause communication interruption.
  • This application provides a network selection method, a sending method, a communication device and a computer-readable storage medium, which helps to reduce the number of invalid network selections of a terminal device, reduce the power consumption of the terminal device, and increase the battery life of the terminal device.
  • a network selection method includes: obtaining network selection decision reference information; and determining whether to select a network when a terminal device has no network coverage based on the network selection decision reference information.
  • the network selection decision reference information is used to indicate the service-related information of the service to be transmitted. information.
  • the service-related information includes the maximum transmission delay
  • Determining whether to select a network when the terminal device has no network coverage based on the network selection decision reference information includes:
  • the duration of the terminal device without network coverage is greater than the maximum transmission delay, it is determined that the terminal device has no network coverage and the network is selected; and/or, if the duration of the terminal device without network coverage is less than or equal to the said maximum transmission delay, it is determined that the terminal device does not have network coverage and does not select a network.
  • the business-related information includes at least one of the following information:
  • Maximum downlink transmission delay maximum uplink transmission delay, time information of data to be transmitted, service type, network slice information, application information, and network information providing data services.
  • the method further includes: sending network selection determination indication information, where the network selection determination indication information is used to indicate a network selection determination result.
  • the obtaining the network selection decision reference information includes: receiving the network selection decision reference information, where the network selection decision reference information is used to indicate the network selection decision result.
  • determining whether to select a network when the terminal device has no network coverage based on the network selection decision reference information includes:
  • the network selection determination result indicates network selection, it is determined that the terminal device has no network coverage and the network is selected; and/or if the network selection determination result indicates that the network selection is not selected, it is determined that the terminal device has no network coverage. Don’t choose the network.
  • the network selection decision reference information is used to indicate network selection preferences
  • Determining whether to select a network when a terminal device has no network coverage based on the network selection decision reference information includes:
  • the network selection decision reference information indicates that the network selection is preferred, it is determined that the terminal device has no network coverage and the network is selected; and/or if the network selection decision reference information indicates that the network selection is not preferred. Select a network, and then do not select a network when it is determined that the terminal device has no network coverage.
  • the network selection decision reference information includes one or more of the following contents:
  • User demand information network selection behavior statistical information, network selection behavior prediction information, and network selection strategy information.
  • the obtaining reference information for network selection decision-making includes:
  • control plane information where the control plane information includes part or all of the network selection decision reference information; or,
  • Receive user plane information where the user plane information includes part or all of the network selection decision reference information; or,
  • Receive routing strategy information which includes part or all of the network selection decision reference information; or,
  • configuration information stored in the global subscriber identity card, mobile device or maintenance entity, where the configuration information includes part or all of the network selection decision reference information.
  • control plane information is non-access layer signaling or radio resource control signaling.
  • the terminal device includes a modem and an application processor; the obtaining network selection decision reference information includes:
  • the application processor obtains part or all of the network selection decision reference information
  • the application processor sends an attention (AT) command to the modem, where the AT command includes part or all of the network selection decision reference information;
  • Determining whether to select a network when the terminal device has no network coverage based on the network selection decision reference information includes:
  • the modem determines whether to select a network when the terminal device has no network coverage based on the network selection decision reference information.
  • the terminal device is determined to have no network coverage based on the network selection decision reference information. Whether to choose a network when covering, including:
  • the terminal device determines whether to select a network when the terminal device does not have network coverage based on the network selection decision reference information; or,
  • the terminal device If the terminal device has no network coverage after the first period of time, it is determined based on the network selection decision reference information whether to select a network when the terminal device has no network coverage.
  • determining whether to select a network when the terminal device has no network coverage based on the network selection decision reference information includes:
  • this application also discloses a sending method.
  • the method includes: sending part or all of the network selection decision reference information.
  • the network selection decision reference information is used to determine whether to select a network when the terminal device has no network coverage.
  • the network selection decision reference information is used to indicate service-related information of the service to be transmitted.
  • the business-related information includes at least one of the following information:
  • Maximum downlink transmission delay maximum uplink transmission delay, time information of data to be transmitted, service type, network slice information, application information, and network information providing data services.
  • the network selection decision reference information is used to indicate the network selection decision result.
  • the network selection decision reference information is used to indicate network selection preferences.
  • the network selection decision reference information includes one or more of the following contents: user demand information, network selection behavior statistical information, network selection behavior prediction information, and network selection strategy information.
  • part or all of the reference information for sending network selection decisions includes:
  • control plane information includes part or all of the network selection decision reference information
  • Send user plane information where the user plane information includes part or all of the network selection decision reference information; or,
  • routing policy information includes part or all of the network selection decision reference information
  • control plane information is non-access layer signaling or radio resource control signaling.
  • the network selection decision reference information is used to determine whether to select a network when the terminal device is not covered by a satellite network.
  • this application also discloses a communication device.
  • the communication device includes:
  • Communication module used to obtain reference information for network selection decisions
  • a processing module configured to determine whether to select a network when the terminal device has no network coverage based on the network selection decision reference information.
  • this application also discloses a communication device, including:
  • the communication module is used to send part or all of the network selection decision reference information, where the network selection decision reference information is used to determine whether to select a network when the terminal device has no network coverage.
  • a fifth aspect provides a computer-readable storage medium on which a computer program is stored, and the computer program is run by a processor to execute any method provided in the first aspect or the second aspect.
  • a sixth aspect provides a communication device, including a memory and a processor.
  • the memory stores a computer program that can be run on the processor.
  • the processor runs the computer program to execute any method provided in the first aspect.
  • a communication device including a memory and a processor.
  • the memory stores a computer program that can be run on the processor.
  • the feature is that the processor runs A computer program is used to execute any method provided in the second aspect.
  • a computer program product on which a computer program is stored, and the computer program is run by a processor to execute any one of the methods provided in the first aspect or the second aspect.
  • a communication system including the above terminal device and the above network device.
  • embodiments of the present application also provide a chip (or data transmission device), a computer program is stored on the chip, and when the computer program is executed by the chip, the steps of the above method are implemented.
  • terminal equipment or network equipment can refer to the network selection decision reference information to determine whether to select a network when the terminal equipment does not have network coverage, which helps to reduce invalid selections when the terminal equipment does not have network coverage.
  • the number of times the terminal device has been connected to the network increases the possibility of effectively selecting a network when there is no network coverage, thereby helping to improve the possibility of the terminal device communicating normally for related services, further helping to reduce the power consumption of the terminal device and improving the user experience.
  • the network selection decision reference information is used to indicate business-related information of the service to be transmitted, such as the maximum downlink transmission delay, the maximum uplink transmission delay, time information of the data to be transmitted, service type, network slice information, application information and Provide network information for data services, etc.
  • This application uses business-related information to assist the terminal device in determining whether to select a network when there is no network coverage, which helps to better serve the business to be transmitted and further ensures the smooth development of the business to be transmitted.
  • the network selection decision reference information is used to indicate the network selection preference. This application uses network selection preferences to assist the terminal device in determining whether to select a network when there is no network coverage, which can achieve a more flexible network selection decision and further improve the user experience.
  • Figure 1 is a flow chart of a network selection method provided by an embodiment of the present application.
  • Figure 2 is a flow chart of another network selection method provided by an embodiment of the present application.
  • Figure 3 is an interactive flow chart of a network selection method provided by an embodiment of the present application.
  • Figure 4 is an interactive flow chart of another network selection method provided by an embodiment of the present application.
  • Figure 5 is an interactive flow chart of yet another network selection method provided by an embodiment of the present application.
  • Figure 6 is an interactive flow chart of yet another network selection method provided by an embodiment of the present application.
  • Figure 7 is an interactive flow chart of yet another network selection method provided by an embodiment of the present application.
  • Figure 8 is an interactive flow chart of yet another network selection method provided by an embodiment of the present application.
  • Figure 9 is an interactive flow chart of yet another network selection method provided by an embodiment of the present application.
  • Figure 10 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 11 is a schematic diagram of the hardware structure of a communication device provided by an embodiment of the present application.
  • Communication systems applicable to the embodiments of this application include but are not limited to Long Term Evolution (LTE) systems, fifth-generation (5th-generation, 5G) systems such as New Radio (NR) systems, and future evolution systems or Various communication integration systems.
  • LTE Long Term Evolution
  • 5th-generation 5th-generation
  • NR New Radio
  • Various communication integration systems e.g., LTE-term Evolution
  • the 5G system may be a Non-StandAlone (NSA) 5G system or a StandAlone (SA) 5G system.
  • SA StandAlone
  • the technical solution of this application is also applicable to different network architectures, including but not limited to relay network architecture, dual-link architecture, vehicle-to-everything communication architecture and other architectures.
  • the network device in this embodiment of the present application may be an access network device or a core network device.
  • the access network equipment may specifically be a Base Station (BS) (also called a base station equipment).
  • the network equipment is a device deployed in a Radio Access Network (Radio Access Network, RAN) to provide wireless communication functions.
  • BS Base Station
  • RAN Radio Access Network
  • the equipment that provides the base station function in the 2G) network includes the Base Transceiver Station (BTS).
  • BTS Base Transceiver Station
  • the equipment that provides the base station function in the third generation (3rd-Generation, 3G) network includes the NodeB (NodeB).
  • the equipment that provides base station functions in the (4th-Generation, 4G) network includes evolved NodeB (eNB).
  • eNB evolved NodeB
  • the equipment that provides base station functions is the access point ( Access Point (AP), next generation Node Base station (gNB), a device that provides base station functions in NR, and Node B (ng-eNB) that continues to evolve, in which NR technology is used between gNB and terminal equipment.
  • AP access point
  • gNB next generation Node Base station
  • ng-eNB Node B
  • E-UTRA Evolved Universal Terrestrial Radio Access
  • Both gNB and ng-eNB can be connected to the 5G core network.
  • the network equipment in the embodiment of the present application also includes equipment that provides base station functions in new communication systems in the future.
  • Core network equipment can be core network elements or core network functional entities.
  • core network equipment can be application function (Application Function, AF), unified data management function (Unified Data Management, UDM), access and mobility management function (Access and Mobility Management Function, AMF), session management function (Session Management Function (SMF), Policy Control Function (PCF), etc.
  • Application Function Application Function
  • UDM Unified Data Management
  • AMF Access and Mobility Management Function
  • SMF Session Management Function
  • PCF Policy Control Function
  • Terminal equipment in the embodiments of this application may refer to various forms of access terminals, user units, user stations, mobile stations, mobile stations (MS), remote stations, remote terminals, mobile devices, users Terminal, wireless communication equipment, user agent or user device.
  • the terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), or a wireless communication device.
  • Terminal equipment may also be called user equipment (User Equipment, UE), terminal, etc.
  • the maximum transmission delay is used to represent the maximum value of the time from the beginning of sending data to the completion of receiving the data.
  • the maximum transmission delay of uplink communication and the maximum transmission delay of downlink communication may be the same or different.
  • the maximum transmission delay of uplink communication and the maximum transmission delay of downlink communication are different, in order to facilitate the distinction, the maximum transmission delay of uplink communication is called the uplink maximum transmission delay, and the maximum transmission delay of downlink communication is called It is the maximum downlink transmission delay.
  • the time information of the data to be transmitted can indicate the transmission time of the data to be transmitted, that is, how long it will be transmitted or at what time it will be transmitted.
  • the data to be transmitted may include data of services currently being performed and/or data of services that may be performed in the future.
  • the time information of the data to be transmitted is 5 milliseconds (ms), which means that the data to be transmitted will start to be transmitted 5ms after the current time, or the time information of the data to be transmitted is time T, which means that the data to be transmitted will be transmitted at time T. .
  • the service type indicates the type of service transmitted between the terminal device and the network device or between the terminal device and the terminal device.
  • the service type includes voice service, video service, tactile service, multi-modal service, etc.
  • Different types of services have different requirements on latency.
  • the corresponding delay requirement for voice services is 200ms. That is, for voice services, the communication delay between terminal equipment and base stations or terminal equipment and terminal equipment should be less than 200ms.
  • the delay requirement for video services is 50ms. That is, for video services, the communication delay between the terminal equipment and the base station should be less than 50ms.
  • Network slice information is used to indicate network slices.
  • the network slice information may specifically be the identifier of the network slice.
  • Different network slices can be used to perform different types of services.
  • network slice 1 is used to perform voice services. If the voice service corresponding to network slice 1 has higher latency requirements, the terminal device needs to select a network when there is no network coverage.
  • network slice 2 is used to perform non-real-time services such as non-real-time data download services. If network slicing 2 does not have high latency requirements, the terminal device does not need to select a network when there is no network coverage.
  • Application information can indicate the application.
  • the application information may specifically include the application identifier, package name, etc.
  • Different applications have different services.
  • instant messaging applications are applications for voice services.
  • a browser application is an application used to provide web browsing services.
  • the network information that provides data services may be the network address that provides network services, network type, protocol type, and other information that can be used to identify the network that provides data services.
  • the network address can be a domain name or Internet Protocol (Internet Protocol, IP) address, Media Access Control (Media Access Control, MAC) address or port number, etc.
  • the network type may be Time Sensitive Networking (TSN) or Deterministic Networking (Detnet).
  • TSN Time Sensitive Networking
  • Detnet Deterministic Networking
  • Different networks provide different services.
  • the user demand information can indicate the terminal device's preference for whether to select a network when there is no network coverage.
  • the user demand information may be that the user sets the terminal device accordingly according to his or her own needs. That is, the terminal device can respond to the user's corresponding operations and perform corresponding settings or storage according to the user's needs.
  • Network selection behavior statistics can indicate the terminal device's preference for whether to select a network when there is no network coverage.
  • Network selection behavior statistics can be based on whether the terminal device selects a network when there is no network coverage. Obtained by statistics of historical behavior. For example, network selection behavior statistics can represent the historical behavior of whether to select a network when the current terminal device has no network coverage in the week before the current moment. Alternatively, the network selection behavior statistical information can represent the historical behavior of whether to select a network when the current terminal device has no network coverage within one week before the current time and in the same satellite coverage area or geographical location area. Alternatively, the network selection behavior statistics information can represent the network selection behavior of other terminal devices within the same satellite coverage area at the current moment.
  • the network selection behavior prediction information can indicate the terminal device's preference for whether to select a network when there is no network coverage.
  • the network selection behavior prediction information may be predicted based on the prediction reference information. For example, it can be predicted based on statistical information on network selection behavior and/or user demand information.
  • the network selection behavior prediction information may be the probability of preferring to choose a network and the probability of preferring not to choose a network.
  • the network selection behavior prediction information may also be a network access technology or a network identifier.
  • the network selection policy information may indicate the terminal device's preference for whether to select a network when there is no network coverage.
  • the network selection policy information may specifically come from the policy control function. Specifically, the network selection policy information may indicate whether the terminal device prefers network selection.
  • the network selection policy information is a single-bit bit value. The bit value of 1 indicates that the terminal device prefers network selection. The bit value of 0 indicates that the terminal device does not prefer network selection. Choose a network.
  • the network selection policy information may be a preferred network selection condition and/or a preferred network selection condition. For example, the network selection policy information is to select a network when the battery power is greater than 50%, and not to select a network when the battery power is less than 50%.
  • the network selection policy information is: do not select a network when roaming and select a network when not roaming.
  • the network selection policy information is to select a network when the network operator is a contracted operator, but not to select a network when the network operator is not a contracted operator.
  • the network selection method can be implemented in the form of a software program, and the software program runs in a processor integrated within the chip or chip module. This method can also be implemented using software combined with hardware, which is not limited by this application.
  • Embodiment 1 The terminal device determines whether to select a network when the terminal device has no network coverage.
  • FIG. 1 is a schematic flow chart of a network selection method provided by this application, which specifically includes the following steps:
  • Step 101 The terminal device obtains network selection decision reference information.
  • the network selection decision reference information is used to determine whether the terminal device should select a network when there is no network coverage. It can also be called network selection decision information, network selection decision reference information, etc.
  • the name of the network selection decision reference information is not specified in the embodiment of this application. Make limitations.
  • the network selection decision reference information is used to indicate service-related information of the service to be transmitted.
  • the network selection decision reference information may include service-related information of the service to be transmitted.
  • the services to be transmitted in this application can be understood as services with communication requirements.
  • the services to be transmitted may include services currently being executed and/or services that may be executed in the future.
  • the currently executing business can be understood as the business that is currently being executed and has not completed transmission.
  • the information related to the service to be transmitted may include one of the maximum uplink transmission delay, the maximum downlink transmission delay, time information of the data to be transmitted, service type, network slice information, application information, and network information that provides data services. or multiple items.
  • the network selection decision reference information may be used to indicate network selection preferences.
  • the network selection decision reference information may include one or more of the following information: user demand information, network selection behavior statistical information, network selection behavior prediction information, and network selection strategy information.
  • the terminal device can obtain network selection decision reference information from relevant information stored or set by itself.
  • the reference information for network selection decision-making includes user demand information.
  • the terminal device can obtain user demand information from relevant information stored or set by itself.
  • the terminal device can obtain the network selection decision reference information from the global subscriber identity card, mobile device or maintenance entity (Maintenance Entities, ME).
  • the network selection decision reference information may also be sent by the network device to the terminal device. That is, the network device sends network selection decision reference information to the terminal device.
  • the network selection decision reference information includes network slicing information, and the network slicing information may be indicated by the network device to the terminal device.
  • the network selection decision reference information is used to indicate the network selection decision result. select The network determination result is used to indicate whether the terminal device selects a network when there is no network coverage.
  • the network device may carry the network selection decision reference information in the control plane information and send it to the terminal device.
  • the control plane information can be non-access stratum (Non-Access Stratum, NAS) signaling, access stratum (Access Stratum, AS) signaling, etc.
  • the network selection decision reference information is carried in the NAS Registration Accept message.
  • the NAS registration confirmation message carries the maximum transmission delay, and may carry the time unit and time value.
  • the time unit indicates the timing unit of the time, which can be seconds, minutes, hours, duration without satellite coverage, etc.
  • the time value indicates how many units of time there are.
  • the NAS registration confirmation message may also carry satellite identification (Identity, ID) and/or ephemeris information. Satellite ID and ephemeris information are used to assist in obtaining the duration of satellite non-coverage.
  • the duration of non-coverage of a satellite can be calculated through satellite ID and ephemeris information; ephemeris information includes satellite altitude, speed, angle, and direction.
  • the ephemeris information can also be pre-configured in the terminal device; or the ephemeris information can also be pre-configured in the network device, and the network device transmits the ephemeris information to the terminal device.
  • the network device may carry the network selection decision reference information in the user plane information and send it to the terminal device.
  • the user plane information may be information transmitted in the user plane, etc.
  • the network device can carry the network selection decision reference information in the route selection policy information (UE Route Selection Policy, URSP) and send it to the terminal device.
  • UE Route Selection Policy UE Route Selection Policy
  • part of the network selection decision reference information is obtained by the terminal device from related information stored or set by itself, and the other part of the network selection decision reference information is sent by the network device to the terminal device.
  • the reference information for network selection decision-making includes user demand information and maximum downlink transmission delay.
  • the user demand information is obtained by the terminal device from the relevant information stored or set by itself, and the maximum downlink transmission delay is sent by the network device to the terminal device.
  • Step 102 The terminal device determines whether to select a network when the terminal device has no network coverage based on the network selection decision reference information.
  • the terminal device determines whether to select a network when there is no satellite network coverage based on the network selection decision reference information. In another example, the terminal device determines whether to select a network when the terminal device is not covered by a cellular network based on the network selection decision reference information.
  • the terminal device may trigger network selection determination based on the following methods:
  • Method 1 The terminal device detects that there is no network coverage, and triggers the network selection decision reference information to determine whether the terminal device should select a network when there is no network coverage. For example, the terminal device detects that there is no network coverage, obtains the network selection decision information, and then determines whether to select the network when the terminal device has no network coverage based on the network selection decision reference information. For example, the terminal device can obtain the network selection decision information in advance, and when detecting no network coverage, trigger the network selection decision reference information to determine whether the terminal device should select the network when there is no network coverage.
  • Method 2 When the terminal device predicts that the terminal device has no network coverage after the first period of time, it triggers a decision based on the network selection decision reference information to determine whether to select a network when the terminal device has no network coverage. For example, when the terminal device predicts that the terminal device will not have network coverage after a first period of time, it obtains network selection decision information, and then determines whether to select a network when the terminal device has no network coverage based on the network selection decision reference information. For example, the terminal device can obtain the network selection decision information before predicting that the terminal device will have no network coverage after the first period of time. After predicting that the terminal device will have no network coverage after the first period of time, based on the network selection decision reference information, Determine whether to select the network when the terminal device has no network coverage.
  • the unit of the first duration may be seconds, radio frames, subframes, time slots, symbols, etc., and is not limited thereto. Take the unit of the first duration as seconds as an example.
  • the first duration may be 2 seconds, 4 seconds, 6 seconds, etc.
  • the first duration may be predefined through a protocol, or may be indicated by the network device to the terminal device, or may be determined by the terminal device according to a certain algorithm or policy, and no determination is made on this.
  • the above are only two examples of triggering the network selection determination of the terminal device, and are not sufficient to limit the embodiments of this application.
  • the terminal device's network selection determination can also be triggered in other ways, and this is not limited.
  • the terminal device determines that there is no network coverage and selects a network, then the terminal device has no network coverage. Select the network when there is network coverage. That is to say, if the terminal device determines that there is no network coverage and selects a network, the terminal device will search for a network when there is no network coverage and reselect a network. For example, if the terminal device selects a network when it determines that there is no network coverage, then when there is no network coverage, the terminal device can search the network first and reselect the network after 10 seconds.
  • the terminal device selects a network when it is determined that there is no network coverage, then when there is no network coverage, the terminal device can reselect a network immediately after searching for the network. For another example, if the terminal device determines that there is no network coverage and selects a network, the terminal device may also predict that there will be no network coverage after a second period of time at a certain time, and then the terminal device searches for a network at that time and reselects a network. When the terminal device has no network coverage or the signal strength of the terminal device in network coverage is less than a certain threshold, the network access process is initiated to the reselected network.
  • the terminal device determines that there is no network coverage and does not select a network
  • the terminal device does not select a network when there is no network coverage. That is to say, if the terminal device determines that there is no network coverage and selects a network, the terminal device will not search for a network and will not reselect a network when there is no network coverage. For example, if the terminal device selects a network when it determines that there is no network coverage, the terminal device does not search for a network and does not select a network when there is no network coverage. For another example, for Internet of Things (IoT) devices, if their communication needs are to download non-urgent data, then when there is no satellite network coverage, the network will not be searched.
  • IoT Internet of Things
  • Selecting a network in the embodiment of the present invention may refer to processes such as searching for a network, camping on the network, receiving broadcast messages from the network, and/or registering with the network.
  • the terminal device can determine whether to select the network when there is no network coverage based on the following methods:
  • the terminal device determines that there is no network coverage and selects a network.
  • the terminal device determines that there is no network coverage and does not select a network.
  • the terminal device determines that there is no network coverage and selects a network.
  • the terminal The device does not select a network when it determines that there is no network coverage.
  • the duration of no network coverage of the terminal device may be calculated or predicted by the terminal device.
  • the duration of the terminal device without network coverage refers to the duration of the terminal device in the non-network coverage area.
  • the terminal device can determine whether to select a network when the terminal device has no network coverage based on the following methods according to the network selection decision reference information:
  • the terminal device determines that there is no network coverage and selects the network.
  • the terminal device determines that there is no network coverage and does not select the network.
  • the network selection decision reference information may be 1-bit information, such as 0 or 1. For example, if the network selection decision reference information is 1, it indicates network selection. For another example, if the network selection decision reference information is 0, it indicates that no network is selected.
  • the network selection decision reference can also be at least two bits of information, and this application does not limit this.
  • the terminal device can determine whether to select the network when there is no network coverage based on the following methods:
  • the terminal device determines that the network is selected when there is no network coverage.
  • the terminal device determines that there is no network coverage and does not select a network.
  • the reference information for network selection decision-making including user demand information as an example.
  • User demand information can indicate network selection preferences.
  • the terminal device can determine whether to select the network when there is no network coverage based on the following methods:
  • the terminal device determines that there is no network coverage. Choose a net when covering. For another example, if the user demand information indicates a preference not to select a network, the terminal device determines that there is no network coverage and does not select a network.
  • the terminal device can determine whether to select a network when there is no network coverage based on the network selection reference information based on the following method:
  • the terminal device determines that there is no network coverage and selects the network. For another example, if the statistical information on network selection behavior indicates that the terminal device's historical behavior in the last week within the same satellite coverage area is not to select a network, the terminal device will not select a network when it determines that there is no network coverage.
  • the terminal device can determine whether to select the network when there is no network coverage based on the following method:
  • the terminal device determines that the network is selected when there is no network coverage.
  • the terminal device can determine whether to select a network when there is no network coverage based on the network selection reference information based on the following method:
  • the terminal device first determines the battery power; if the battery power is greater than 50%, the terminal device determines that there is no network coverage. Choose a network.
  • the terminal device can determine whether to select the network when there is no network coverage based on the following methods:
  • the terminal device determines that there is no network coverage and selects a network. For another example, if the duration of no network coverage of the terminal device is less than or equal to the transmission delay, the terminal device determines that there is no network coverage and does not select a network.
  • the time information of the data to be transmitted, network slice information, application information and network information providing data services can all indicate the transmission delay.
  • the network selection decision reference information includes the above information
  • the terminal device determines based on the network selection decision reference information. The method of determining whether to select a network when the terminal device does not have network coverage is similar to the above process and will not be described again here.
  • the terminal device can select the maximum value of the multiple types of transmission delays. The maximum value is used to determine whether there is no network coverage. Choose a network. Alternatively, the terminal device can also select the minimum value of multiple transmission delays, and the minimum value is used to determine whether to select a network when there is no network coverage.
  • the terminal device can randomly select one network selection preference from the multiple network selection preferences to determine whether to select a network when there is no network coverage.
  • the terminal device can use the transmission delay to determine whether to select a network when there is no network coverage; it can also use the network selection preference to determine whether to select a network when there is no network coverage.
  • the reference information for network selection decision-making includes the maximum downlink transmission delay and network slicing information, and the transmission delay used by the network slicing information to execute services is different from the maximum downlink transmission delay. Then the terminal device can select the transmission delay of the service and the maximum downlink transmission delay. The maximum value of the transmission delay is compared with the duration of no network coverage to determine whether to select a network.
  • Embodiment 2 The network device determines whether to select a network when there is no network coverage.
  • FIG. 2 is a schematic flow chart of a network selection method provided by this application, which specifically includes the following steps:
  • Step 201 The network device obtains network selection decision reference information.
  • the network selection decision reference information may be sent by the terminal device to the network device. That is, the terminal device sends network selection decision reference information to the network device.
  • the reference information for network selection decision-making includes user demand information.
  • the terminal device sends user requirements to the network device Asking for information.
  • the terminal device may carry the network selection decision reference information in an uplink message and send it to the network device.
  • the network selection decision reference information may be obtained by the network device from other devices or core network elements.
  • the reference information for network selection decision-making includes the maximum transmission delay.
  • the network device obtains the network selection decision reference information from the application function; or the network device obtains the network selection decision reference information from the UDM.
  • Step 202 The network device determines whether to select a network when the terminal device has no network coverage based on the network selection decision reference information.
  • the specific implementation method for the network device to determine whether to select a network when the terminal device has no network coverage based on the network selection decision reference information can be seen in Figure 1.
  • the terminal device determines whether to select the network when the terminal device has no network coverage based on the network selection decision reference information. The relevant description of the specific implementation method will not be repeated here.
  • the network device can trigger, based on the network selection decision reference information, to determine whether the terminal device should select a network when there is no network coverage in the following manner:
  • Method 1 The network device detects that there is no network coverage and triggers the network selection decision reference information to determine whether the terminal device should select the network when there is no network coverage. For example, the network device detects that there is no network coverage, obtains the network selection decision information, and then determines whether to select the network when the terminal device has no network coverage based on the network selection decision reference information. For example, network equipment can obtain network selection decision-making information in advance. When no network coverage is detected, it can trigger network selection decision-making reference information to determine whether the terminal device should select a network when there is no network coverage.
  • Method 2 When the network device predicts that the terminal device has no network coverage after the first period of time, it triggers a decision based on the network selection decision reference information to determine whether to select the network when the terminal device has no network coverage. For example, when the network device predicts that the terminal device has no network coverage after the first period of time, it obtains the network selection decision information, and then determines whether to select the network when the terminal device has no network coverage based on the network selection decision reference information. For example, the network device can obtain the network selection decision information before predicting that the terminal device will have no network coverage after the first period of time. After predicting that the terminal device will have no network coverage after the first period of time, the network device can then obtain the network selection decision reference information, Determine terminal Whether to select the network when the device has no network coverage.
  • the above are only two examples of triggering the network device selection determination, and are not sufficient to limit the embodiments of the present application.
  • the network device network selection determination can also be triggered in other ways, and this is not limited.
  • the network device sends network selection determination indication information.
  • the terminal device receives the network selection determination indication information.
  • the network selection determination indication information is used to indicate the network selection determination result.
  • the terminal device receives the network selection determination indication information. If the network selection determination result indicates network selection, the terminal device determines that there is no network coverage and selects the network. For another example, if the network selection determination result indicates that the network is not selected, the terminal device determines that there is no network coverage and does not select the network.
  • Embodiment 3 The terminal device determines whether to select a network when the terminal device has no network coverage, and sends network selection policy reference information through control plane information.
  • FIG. 3 it is a schematic flow chart of another network selection method provided by this application, which specifically includes the following steps:
  • Step 301 AF sends network selection decision reference information to UDM.
  • AF sends network selection decision reference information to UDM through the interface Network Exposure Function (NEF).
  • NEF Network Exposure Function
  • Step 302 UDM sends network selection decision reference information to the access and mobility management function.
  • UDM can send the network selection decision reference information to the AMF through the container, so that the network selection decision reference information can be encrypted or integrity protected to ensure the transmission security of the network selection decision reference information.
  • Step 303 The AMF sends network selection decision reference information to the terminal device.
  • the AMF can carry the network selection decision reference information in the control plane information and send it to the terminal device.
  • the control plane information may be non-access layer signaling.
  • the control surface The information may also be radio resource control signaling.
  • the NAS registration confirmation message can carry the time unit and time value.
  • the AMF may carry the network selection decision reference information in the downlink signaling during the mobility management process and send it to the terminal device.
  • the mobility management process includes the following processes: registration process, de-registration process, configuration update process, service process, notification process, authentication process, identity authentication process, security process, 5G system mobility management status process, non-access Layer transmission process, roaming guidance (Steering of Roaming, SOR) process, relay process, etc.
  • Step 304 The terminal device determines whether to select a network when the terminal device has no network coverage based on the network selection decision reference information.
  • the AF can also directly send the network selection decision reference information to the AMF.
  • the AMF in the network selection method shown in Figure 3 can be replaced by an SMF, that is, the SMF sends the network selection decision reference information to the terminal device.
  • the specific process of the network selection method can be shown in 4, which specifically includes the following steps:
  • Step 401 AF sends network selection decision reference information to UDM.
  • Step 402 UDM sends network selection decision reference information to SMF.
  • Step 403 The SMF sends network selection decision reference information to the terminal device.
  • the SMF can carry network selection decision reference information in the control plane information.
  • the control plane information is non-access layer signaling or radio resource control signaling.
  • the SMF can carry network selection decision reference information in downlink signaling during the session management process.
  • the session management process includes the following processes: session establishment process, session modification process, session release process, session authentication process, service level authentication process, session status process, terminal device reporting process, etc.
  • the NAS registration confirmation message can carry the time unit and time value.
  • Step 404 The terminal device determines whether to select a network when the terminal device has no network coverage based on the network selection decision reference information.
  • Embodiment 4 The terminal device determines whether to select a network when the terminal device has no network coverage, and sends network selection policy reference information through user plane information.
  • FIG. 5 it is a schematic flow chart of another network selection method provided by this application, which specifically includes the following steps:
  • Step 501 The terminal device establishes a packet data unit session with the AF through the core network.
  • Step 502 The AF sends user plane information to the terminal device based on the PDU session.
  • the user plane information includes network selection decision reference information.
  • Step 503 The terminal device receives the user plane information and determines whether to select a network when the terminal device has no network coverage based on the network selection decision reference information.
  • the terminal device receives the user plane information through the application program, and then the application program sends the network selection policy reference information to the non-access layer (such as the NAS layer).
  • the non-access layer determines whether to select a network when the terminal device has no network coverage based on the network selection decision information.
  • the application layer can send network selection policy reference information to the non-access layer through AT commands.
  • the application sends the network selection decision reference information to the functional unit for the functional unit to Determine whether to choose a network.
  • Embodiment 5 The terminal device determines whether to select a network when the terminal device has no network coverage, and the network selection policy reference information is obtained by the terminal device from relevant information set by the user.
  • FIG. 6 it is a schematic flow chart of a network selection method provided by an embodiment of the present application, which specifically includes the following steps:
  • Step 601 The terminal device obtains network selection decision reference information from the global subscriber identity card, mobile device or maintenance entity.
  • Step 602 The terminal device determines whether to select a network when the terminal device has no network coverage based on the network selection decision reference information.
  • network selection decision reference information indicating network selection preference may be stored in the global subscriber identity card, mobile device or maintenance entity.
  • the maintenance entity can be UDM, Unified Data Repository (UDR) or AF; the maintenance entity can also be a function on the network device side specifically used to maintain network selection decision information.
  • the terminal device can determine whether to select a network when the terminal device has no network coverage based on the following method: for example, if the network selection decision reference information indicates a preference for network selection, the terminal device determines to select a network when there is no network coverage. For another example, if the network selection decision reference information indicates a preference not to select a network, the terminal device determines that there is no network coverage and does not select a network.
  • Embodiment 6 The terminal device determines whether to select a network when the terminal device has no network coverage, and the policy control function sends network selection policy reference information.
  • FIG. 7 it is a schematic flow chart of another network selection method provided by this application, which specifically includes the following steps:
  • Step 701 AF sends network selection decision reference information to PCF.
  • AF sends network selection decision reference information through the interface Network Exposure Function (NEF).
  • NEF Network Exposure Function
  • the PCF receives the network selection decision reference information, and determines routing strategy information based on the network selection decision reference information.
  • the routing strategy information includes part or all of the network selection decision reference information.
  • Step 702 PCF sends routing policy information to the terminal device.
  • Step 703 The terminal device determines whether to select a network when the terminal device has no network coverage based on the network selection decision reference information.
  • the access and mobility management function may also forward the network selection decision reference information from the PCF to the terminal device.
  • Embodiment 7 UDM determines whether to select a network when the terminal device has no network coverage.
  • FIG. 8 it is a schematic flow chart of another network selection method provided by this application, which specifically includes the following steps:
  • Step 801 AF sends network selection decision reference information to UDM.
  • Step 802 UDM determines whether to select a network when the terminal device has no network coverage based on the network selection decision reference information, and generates network selection determination indication information.
  • the network selection determination indication information is used to indicate the network selection determination result.
  • the network selection determination result includes whether to select a network or not to select a network.
  • Step 803 UDM sends network selection determination indication information to the access and AMF.
  • Step 804 The AMF sends network selection determination indication information to the terminal device.
  • Step 805 The terminal device performs network selection or does not perform network selection according to the network selection determination instruction information.
  • part of the network selection policy reference information in this application may be partly sent by other equipment (such as core network equipment or other network equipment) to the equipment used for network selection decision, and part of it may be used for network selection decision.
  • the device obtains it from related information set or stored by itself; or, all the network selection policy reference information is sent by other devices (such as core network equipment, or other network equipment) to the device used for network selection determination; or, All network selection policy reference information is obtained by the device used for network selection determination from its own settings or stored related information, and there is no limit to this.
  • Embodiment 8 The application processor in the terminal device obtains network selection decision reference information.
  • the terminal device includes a modem and an application processor.
  • the modem is used to determine whether to select a network when the terminal device has no network coverage.
  • Figure 9 is a schematic flow chart of another network selection method provided by this application, which specifically includes the following steps:
  • Step 901 The application processor obtains network selection decision reference information.
  • the reference information for network selection decision-making can come from network equipment, or from configuration information in global subscriber identity cards, mobile devices, or maintenance entities; or part of the reference information for network selection decision-making comes from network equipment, and the other part comes from global subscriber identification. Configuration information in the card, mobile device or maintenance entity.
  • Step 902 The application processor sends network selection decision reference information to the modem.
  • the network selection decision reference information can be carried in the AT command.
  • the application processor sends an AT command to the modem, and the AT command includes network selection decision reference information.
  • the application processor can also send network selection decision reference information to the modem through a dedicated user interface.
  • Step 903 The modem determines whether to select a network when the terminal device has no network coverage based on the network selection decision reference information.
  • part of the network selection policy reference information may be indicated by the network device, and the other part may be obtained by the terminal device from related information stored or set by itself.
  • the terminal device for the terminal device to obtain the network selection policy reference information indicated by the network device, please refer to the relevant details of the network selection policy reference information in the above-mentioned Figures 3, 4, 5, 7 and 8.
  • the terminal device obtains the network selection policy reference information from the relevant information stored or set by itself. Refer to Figure 6 and Figure 9 for specific implementation methods of the network selection policy reference information.
  • part of the network selection policy reference information may be reported by the terminal device, and the other part may be obtained by the network device from related information stored or set by itself, or obtained from other network devices.
  • Figure 10 shows a communication device 100.
  • the communication device 100 may include:
  • Communication module 1001 used to obtain reference information for network selection decision-making
  • the processing module 1002 is configured to determine whether to select a network when the terminal device has no network coverage based on the network selection decision reference information.
  • the above-mentioned communication device 100 may correspond to a chip with a network selection function in a terminal device or a network device, such as a system-on-a-chip (SOC), a baseband chip, etc.; or may correspond to a chip in a terminal device It includes a chip module with a network selection function; or a chip module corresponding to a chip with a data processing function, or corresponding to a terminal device, or corresponding to a network device.
  • SOC system-on-a-chip
  • the communication device may include: a communication module for sending part or all of the network selection decision reference information.
  • the network selection decision reference information is used to determine whether to select a network when the terminal device has no network coverage.
  • each device and product described in the above embodiments may be software modules/units or hardware modules/units, or they may be partly software modules/units and partly hardware modules/units.
  • each module/unit included therein can be implemented in the form of hardware such as circuits, or at least some of the modules/units can be implemented in the form of a software program.
  • the software program Running on the processor integrated inside the chip, the remaining (if any) modules/units can be implemented using circuits and other hardware methods; for various devices and products applied to or integrated into the chip module, each module/unit included in it can They are all implemented in the form of hardware such as circuits.
  • Modules/units can be located in the same component of the chip module (such as chips, circuit modules, etc.) or in different components, or at least partially Modules/units can be implemented in the form of software programs, which run on the processor integrated inside the chip module.
  • the remaining (if any) modules/units can be implemented in hardware such as circuits; for applications or integration in terminals
  • Each device and product of the equipment, and each module/unit it contains can be implemented in the form of hardware such as circuits.
  • Different modules/units can be located in the same component (for example, chip, circuit module, etc.) or in different components in the terminal equipment.
  • at least some of the modules/units can be implemented in the form of a software program that runs on a processor integrated within the terminal device, and the remaining (if any) modules/units can be implemented in hardware such as circuits.
  • the storage medium is a computer-readable storage medium, and a computer program is stored thereon. When the computer program is run, the steps of the method shown in Figures 1 to 9 can be executed.
  • the storage medium may include read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk, etc.
  • the storage medium may also include non-volatile memory (non-volatile) or non-transitory (non-transitory) memory, etc.
  • an embodiment of the present application also provides a schematic diagram of the hardware structure of a communication device.
  • the device includes a processor 1101, a memory 1102 and a transceiver 1103.
  • the communication device may be a chip, a chip module, a communication device, etc.
  • the processor 1101 can be a general central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more processors used to control the execution of the program of the present application. integrated circuit.
  • the processor 1101 may also include multiple CPUs, and the processor 1101 may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor.
  • a processor here may refer to one or more devices, circuits, or processing cores for processing data (eg, computer program instructions).
  • Memory 1102 may be ROM or other types of static storage devices that can store static information and instructions, RAM or other types of dynamic storage devices that can store information and instructions, or it may be electrically erasable programmable read-only memory.
  • read-only memory EEPROM
  • read-only compact disc compactdisc read-only memory, CD-ROM
  • optical disc storage including compressed optical discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.
  • magnetic disk storage media or other magnetic storage devices or can be used to carry or Any other medium that stores desired program codes in the form of instructions or data structures and can be accessed by a computer is not subject to any limitation in the embodiments of the present application.
  • the memory 1102 may exist independently (in this case, the memory 1102 may be located outside the device or within the device), or may be integrated with the processor 1101. Among them, the memory 1102 may contain computer program code.
  • the processor 1101 is used to execute the computer program code stored in the memory 1102, thereby implementing the method provided by the embodiment of the present application.
  • Transceiver 1103 is used to communicate with other devices or communication networks.
  • the transceiver 1103 may include a transmitter and a receiver.
  • the device used to implement the receiving function in the transceiver 1103 can be regarded as a receiver, and the receiver is used to perform the receiving steps in the embodiment of the present application.
  • the device used to implement the sending function in the transceiver 1103 can be regarded as a transmitter, and the transmitter is used to perform the sending steps in the embodiment of the present application.
  • the processor 1101 is used to control and manage the actions of the terminal device.
  • the processor 1101 is used to support the terminal device to execute the diagram. Steps 111 and 112 in 1, or steps 303 and 304 in Figure 3, or steps 403 and 404 in Figure 4, or steps 503 and 504 in Figure 5, or steps 601 and 604 in Figure 6 602, or step 702 and step 703 in Figure 7, or step 804 and step 805 in Figure 8, or step 902 and step 903 in Figure 9, and/or other processes described in the embodiments of the present application.
  • the processor 1101 may communicate with other network entities through the transceiver 1103, for example, with the network devices described above.
  • the memory 1102 is used to store program codes and data of the terminal device.
  • the processor 1101 is used to control and manage the actions of the network device.
  • the processor 1101 is used to support the network device to execute the diagram.
  • the processor 1101 can communicate with other network entities through the transceiver 1103, for example, with the above-mentioned terminal device.
  • Memory 1102 is used to store program codes and data for network devices.
  • the embodiment of this application defines the one-way communication link from the access network to the terminal device as a downlink, the data transmitted on the downlink is downlink data, and the transmission direction of the downlink data is called the downlink direction; and the terminal device to the access
  • the one-way communication link of the network is the uplink, the data transmitted on the uplink is uplink data, and the transmission direction of the uplink data is called the upstream direction.
  • Multiple appearing in the embodiments of this application refers to two or more than two.
  • connection appearing in the embodiments of this application refers to various connection methods such as direct connection or indirect connection to realize communication between devices, and the embodiments of this application do not limit this in any way.
  • the above embodiments may be implemented in whole or in part by software, hardware, firmware, or any other combination.
  • the above-described embodiments may be implemented in whole or in part as Implementation in the form of a computer program product.
  • the computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on the computer, the processes or functions described in the embodiments of the present application are generated in whole or in part.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another, e.g., the computer instructions may be transferred from a website, computer, server, or data center Transmission by wired or wireless means to another website site, computer, server or data center.
  • the size of the sequence numbers of the above-mentioned processes does not mean the order of execution.
  • the execution order of each process should be determined by its functions and internal logic, and should not be used in the embodiments of the present application.
  • the implementation process constitutes any limitation.
  • the disclosed methods, devices and systems can be implemented in other ways.
  • the device embodiments described above are only illustrative; for example, the division of the units is only a logical function division, and there may be other division methods during actual implementation; for example, multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented.
  • the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in various embodiments of the present application may be integrated into one processing unit, each unit may be physically included separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium.
  • the above-mentioned software functional unit is stored in a storage medium and includes a number of instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute some steps of the methods described in various embodiments of this application.

Abstract

本申请提供了一种选网方法、发送方法、通信装置及计算机可读存储介质，该选网方法包括：获取选网决策参考信息；根据所述选网决策参考信息判定终端设备无网络覆盖时是否选网，从而提供了一种有助于减少终端设备无效选网的次数，减少终端设备功耗，提高终端设备的电池的使用时长的选网方案。

Description

选网方法、发送方法、通信装置及计算机可读存储介质
本申请要求2022年9月14日提交中国专利局、申请号为202211116214.6、发明名称为“选网方法、发送方法、通信装置及计算机可读存储介质”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种选网方法、发送方法、通信装置及计算机可读存储介质。
背景技术
终端设备可以通过接入网络进行通信。然而，终端设备具有移动性，当终端设备进入无网络覆盖区域时，终端设备无法进行通信，容易导致通信中断。
现有技术中，终端设备进入无网络覆盖区域时，会直接搜网，选择新的网络重新接入，以避免终端设备断网，影响用户体验。然而，这种方式容易增加终端设备无效搜网或选网的次数，导致终端设备的功耗增加，减少电池的使用时长。
发明内容
本申请提供了一种选网方法、发送方法、通信装置及计算机可读存储介质，有助于减少终端设备无效选网的次数，减少终端设备功耗，提高终端设备的电池的使用时长。
第一方面，提供了一种选网方法，该方法包括：获取选网决策参考信息；根据所述选网决策参考信息判定终端设备无网络覆盖时是否选网。
可选的，所述选网决策参考信息用于指示待传输业务的业务相关 信息。
可选的，所述业务相关信息包括最大传输延迟；
所述根据所述选网决策参考信息判定终端设备无网络覆盖时是否选网包括：
若所述终端设备的无网络覆盖时长大于所述最大传输时延，则判定所述终端设备无网络覆盖时选网；和/或，若所述终端设备的无网络覆盖时长小于或等于所述最大传输时延，则判定所述终端设备无网络覆盖时不选网。
可选的，所述业务相关信息包括以下信息中的至少一项：
下行最大传输时延、上行最大传输时延、待传输数据的时间信息、业务类型、网络切片信息、应用程序信息、提供数据服务的网络信息。
可选的，所述方法还包括：发送选网判定指示信息，所述选网判定指示信息用于指示选网判定结果。
可选的，所述获取选网决策参考信息包括：接收所述选网决策参考信息，所述选网决策参考信息用于指示选网判定结果。
可选的，所述根据所述选网决策参考信息判定终端设备无网络覆盖时是否选网，包括：
若所述选网判定结果指示选网，则判定所述终端设备无网络覆盖时选网；和/或，若所述选网判定结果指示不选网，则判定所述终端设备无网络覆盖时不选网。
可选的，所述选网决策参考信息用于指示选网偏好；
所述根据所述选网决策参考信息判定终端设备无网络覆盖时是否选网，包括：
如果所述选网决策参考信息指示偏好选网，则判定所述终端设备无网络覆盖时选网；和/或，如果所述选网决策参考信息指示偏好不 选网，则判定所述终端设备无网络覆盖时不选网。
可选的，所述选网决策参考信息包括以下一种或多种内容：
用户需求信息、选网行为统计信息、选网行为预测信息、选网策略信息。
可选的，所述获取选网决策参考信息，包括：
接收控制面信息，所述控制面信息包括所述选网决策参考信息的部分或全部；或者，
接收用户面信息，所述用户面信息包括所述选网决策参考信息的部分或全部；或者，
接收路由选择策略信息，所述路由选择策略信息包括所述选网决策参考信息的部分或全部；或者，
获取存储在全球用户识别卡、移动设备或维护实体中的配置信息，所述配置信息包括所述选网决策参考信息的部分或全部。
可选的，所述控制面信息为非接入层信令或无线资源控制信令。
可选的，所述终端设备包括调制解调器和应用处理器；所述获取选网决策参考信息，包括：
所述应用处理器获取所述选网决策参考信息部分或全部；
所述应用处理器向所述调制解调器发送注意力(Attention，AT)命令，所述AT命令包括所述选网决策参考信息部分或全部；
所述根据所述选网决策参考信息判定所述终端设备无网络覆盖时是否选网，包括：
所述调制解调器根据所述选网决策参考信息，判定所述终端设备无网络覆盖时是否选网。
可选的，所述根据所述选网决策参考信息判定终端设备无网络覆 盖时是否选网，包括：
若所述终端设备当前无网络覆盖，则根据所述选网决策参考信息判定所述终端设备无网络覆盖时是否选网；或者，
若经过第一时长后所述终端设备无网络覆盖，则根据所述选网决策参考信息判定所述终端设备无网络覆盖时是否选网。
可选的，所述根据所述选网决策参考信息判定终端设备无网络覆盖时是否选网，包括：
根据所述选网决策参考信息判定终端设备无卫星网络覆盖时是否选网。
第二方面，本申请还公开一种发送方法，方法包括：发送选网决策参考信息的部分或全部，所述选网决策参考信息用于判定终端设备无网络覆盖时是否选网。
可选的，所述选网决策参考信息用于指示待传输业务的业务相关信息。
可选的，所述业务相关信息包括以下信息中的至少一项：
下行最大传输时延、上行最大传输时延、待传输数据的时间信息、业务类型、网络切片信息、应用程序信息、提供数据服务的网络信息。
可选的，所述选网决策参考信息用于指示选网判定结果。
可选的，所述选网决策参考信息用于指示选网偏好。
可选的，所述述选网决策参考信息包括以下一种或多种内容：用户需求信息、选网行为统计信息、选网行为预测信息、选网策略信息。
可选的，所述发送选网决策参考信息的部分或全部，包括：
发送控制面信息，所述控制面信息包括所述选网决策参考信息的部分或全部；或者，
发送用户面信息，所述用户面信息包括所述选网决策参考信息的部分或全部；或者，
发送路由选择策略信息，所述路由选择策略信息包括所述选网决策参考信息的部分或全部；或者，
发送存储在全球用户识别卡全球用户识别卡、移动设备或维护实体中的配置信息，所述配置信息包括所述选网决策参考信息的部分或全部。
可选的，所述控制面信息为非接入层信令或无线资源控制信令。
可选的，所述选网决策参考信息用于判定终端设备无卫星网络覆盖时是否选网。
第三方面，本申请还公开一种通信装置，通信装置包括：
通信模块，用于获取选网决策参考信息；
处理模块，用于根据所述选网决策参考信息判定终端设备无网络覆盖时是否选网。
第四方面，本申请还公开一种通信装置，包括：
通信模块，用于发送选网决策参考信息的部分或全部，所述选网决策参考信息用于判定终端设备无网络覆盖时是否选网。
第五方面，提供了一种计算机可读存储介质，其上存储有计算机程序，计算机程序被处理器运行以执行第一方面或第二方面提供的任意一种方法。
第六方面，提供了一种通信装置，包括存储器和处理器，存储器上存储有可在处理器上运行的计算机程序，处理器运行计算机程序以执行第一方面提供的任意一种方法。
第七方面，提供了一种通信装置，包括存储器和处理器，存储器上存储有可在处理器上运行的计算机程序，其特征在于，处理器运行 计算机程序以执行第二方面提供的任意一种方法。
第八方面，提供了一种计算机程序产品，其上存储有计算机程序，计算机程序被处理器运行以执行第一方面或第二方面提供的任意一种方法。
第九方面，提供了一种通信系统，包括上述终端设备和上述网络设备。
第十方面，本申请实施例还提供一种芯片(或者说数据传输装置)，该芯片上存储有计算机程序，在计算机程序被芯片执行时，实现上述方法的步骤。
与现有技术相比，本申请实施例的技术方案具有以下有益效果：
本申请技术方案中，通过引入选网决策参考信息，使得终端设备或网络设备可以参考选网决策参考信息判定终端设备无网络覆盖时是否选网，有助于减少终端设备无网络覆盖时无效选网的次数，提高终端设备无网络覆盖时有效选网的可能性，从而有助于提高终端设备针对相关业务正常通信的可能性，进一步的有助于降低终端设备的功耗，提升用户体验。
进一步地，选网决策参考信息用于指示待传输业务的业务相关信息，如下行最大传输时延、上行最大传输时延、待传输数据的时间信息、业务类型、网络切片信息、应用程序信息和提供数据服务的网络信息等。本申请通过业务相关信息来辅助终端设备无网络覆盖时是否选网的判定，有助于更好地服务于待传输业务，进一步保证待传输业务的顺利开展。
进一步地，选网决策参考信息用于指示选网偏好。本申请通过选网偏好来辅助终端设备无网络覆盖时是否选网的判定，能够实现更加灵活地选网判定，进一步提升用户体验。
附图说明
图1是本申请实施例提供的一种选网方法的流程图；
图2是本申请实施例提供的另一种选网方法的流程图；
图3是本申请实施例提供的一种选网方法的交互流程图；
图4是本申请实施例提供的另一种选网方法的交互流程图；
图5是本申请实施例提供的又一种选网方法的交互流程图；
图6是本申请实施例提供的又一种选网方法的交互流程图；
图7是本申请实施例提供的又一种选网方法的交互流程图；
图8是本申请实施例提供的又一种选网方法的交互流程图；
图9是本申请实施例提供的又一种选网方法的交互流程图；
图10是本申请实施例提供的一种通信装置的结构示意图；
图11是本申请实施例提供的一种通信装置的硬件结构示意图。
具体实施方式
本申请实施例适用的通信系统包括但不限于长期演进(Long Term Evolution，LTE)系统、第五代(5th-generation，5G)系统例如新无线(New Radio，NR)系统，以及未来演进系统或者多种通信融合系统。其中，5G系统可以为非独立组网(Non-StandAlone，NSA)的5G系统或独立组网(StandAlone，SA)的5G系统。本申请技术方案也适用于不同的网络架构，包括但不限于中继网络架构、双链接架构、车辆到任何物体的通信(Vehicle-to-Everything)架构等架构。
本申请主要涉及终端设备和网络设备之间的通信。其中，本申请实施例中的网络设备可以是接入网设备或核心网设备。
接入网设备具体可以为基站(Base Station，BS)(也可称为基站设备)，网络设备是一种部署在无线接入网(Radio Access Network，RAN)用以提供无线通信功能的装置。例如在第二代(2nd-Generation， 2G)网络中提供基站功能的设备包括基地无线收发站(Base Transceiver Station，BTS)，第三代(3rd-Generation，3G)网络中提供基站功能的设备包括节点B(NodeB)，在第四代(4th-Generation，4G)网络中提供基站功能的设备包括演进的节点B(evolved NodeB，eNB)，在无线局域网络(Wireless Local Area Networks，WLAN)中，提供基站功能的设备为接入点(Access Point，AP)，NR中的提供基站功能的设备下一代基站节点(next generation Node Base station，gNB)，以及继续演进的节点B(ng-eNB)，其中gNB和终端设备之间采用NR技术进行通信，ng-eNB和终端设备之间采用演进的通用地面无线电接入(Evolved Universal Terrestrial Radio Access，E-UTRA)技术进行通信，gNB和ng-eNB均可连接到5G核心网。本申请实施例中的网络设备还包含在未来新的通信系统中提供基站功能的设备等。
核心网设备可以是核心网网元或核心网功能实体等。例如，核心网设备可以是应用功能(Application Function，AF)、统一数据管理功能(Unified Data Management，UDM)、接入和移动性管理功能(Access and Mobility Management Function，AMF)、会话管理功能(Session Management Function，SMF)、策略控制功能(Policy Control Function，PCF)等。
本申请实施例中的终端设备(terminal equipment)可以指各种形式的接入终端、用户单元、用户站、移动站、移动台(Mobile Station，MS)、远方站、远程终端、移动设备、用户终端、无线通信设备、用户代理或用户装置。终端设备还可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol，SIP)电话、无线本地环路(Wireless Local Loop，WLL)站、个人数字处理(Personal Digital Assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，未来5G网络中的终端设备或者未来演进的公用陆地移动通信网络(Public Land Mobile Network，PLMN)中的终端设备等，本申请实施例对此并不限定。 终端设备也可以称为用户设备(User Equipment，UE)、终端等。
首先，对本申请涉及的部分名词进行解释说明，以便于本领域技术人员理解。
1、最大传输时延。
最大传输时延用于表征从开始发送数据到接收完成该数据的时长的最大值。其中，上行通信的最大传输时延和下行通信的最大传输时延可以相同，也可以不同。但是在上行通信的最大传输时延和下行通信的最大传输时延不同时，为便于区分，将上行通信的最大传输时延称之为上行最大传输时延，将下行通信的最大传输时延称之为下行最大传输时延。
2、待传输数据的时间信息。
待传输数据的时间信息可以表示待传输数据的传输时间，也即在多长时间后传输或者在什么时刻传输。待传输数据可以包括当前正在执行的业务的数据和/或未来可能执行的业务的数据。例如，待传输数据的时间信息为时长5毫秒(ms)，表示待传输数据在当前时刻之后的5ms后开始传输，或者，传输数据的时间信息为时刻T，表示待传输数据将在时刻T传输。
3、业务类型。
业务类型表示终端设备与网络设备之间或终端设备与终端设备之间所传输的业务的类型，例如业务的类型包括语音业务、视频业务、触觉业务、多模态(Multi-modal)业务等。对于具有不同业务类型的业务，其对时延具有不同的要求。如，语音业务对应的时延要求为200ms。即针对语音业务，终端设备和基站或者终端设备与终端设备设备之间的通信时延要小于200ms。再例如，视频业务对应的时延要求为50ms。即针对视频业务，终端设备和基站之间的通信时延要小于50ms。
4、网络切片信息。
网络切片信息用于指示网络切片。例如，网络切片信息具体可以是网络切片的标识。不同网络切片可以用于执行不同类型的业务。例如，网络切片1用于执行语音业务。若网络切片1对应的语音业务对时延的要求较高，那么终端设备在无网络覆盖时就需要选网。再例如，网络切片2用于执行非实时业务如非实时数据的下载业务。若网络切片2对时延要求不高，终端设备在无网络覆盖时就不需要选网。
5、应用程序信息。
应用程序信息可以指示应用程序。例如，应用程序信息具体可以是应用程序的标识、包名等。不同应用程序对应的服务不同。例如，即时通信应用是针对语音服务的应用程序。再例如，浏览器应用是用于提供网页浏览服务的应用程序。
6、提供数据服务的网络信息。
提供数据服务的网络信息可以是提供网络服务的网络地址、网络类型、协议类型等可以用于标识提供数据服务的网络的信息。例如网络地址可以是域名或互联网协议(Internet Protocol，IP)地址、媒体接入控制(Media Access Control，MAC)地址或端口号等。再例如，网络类型可以是时间敏感网络(Time Sensitive Networking，TSN)，确定性网络(Deterministic Networking，Detnet)。再例如，协议类型可以是TSN协议、Detnet协议。不同的网络提供不同的业务。
7、用户需求信息。
用户需求信息可以指示终端设备无网络覆盖时是否选网的偏好。例如，用户需求信息可以是用户根据自身需求对终端设备进行相应设置的。即，终端设备可以响应于用户的相应操作，针对用户需求进行相应的设置或存储。
8、选网行为统计信息。
选网行为统计信息可以指示终端设备无网络覆盖时是否选网的偏好。选网行为统计信息可以是根据终端设备无网络覆盖时是否选网 的历史行为进行统计得到的。例如，选网行为统计信息可以表示在距离当前时刻之前一周内，当前终端设备无网络覆盖时是否选网的历史行为。或者，选网行为统计信息可以表示距离当前时刻之前一周内且在同一卫星覆盖区域或地理位置区域，当前终端设备无网络覆盖时是否选网的历史行为。或者，选网行为统计信息可以表示同一卫星覆盖区域内的其他终端设备在当前时刻的选网行为。
9、选网行为预测信息。
选网行为预测信息可以指示终端设备无网络覆盖时是否选网的偏好。选网行为预测信息可以是基于预测参考信息预测得到的。例如可以基于选网行为统计信息和/或用户需求信息进行预测得到的。选网行为预测信息可以是偏好选网的概率以及偏好不选网的概率。选网行为预测信息还可以是网络接入技术或者网络的标识。
10、选网策略信息。
选网策略信息可以指示终端设备无网络覆盖时是否选网的偏好，选网策略信息具体可以来自于策略控制功能。具体地，选网策略信息可以指示终端设备是否偏好选网例如，选网策略信息为单个比特的比特值，该比特值为1表示终端设备偏好选网，该比特值为0表示终端设备偏好不选网。或者选网策略信息可以是偏好选网条件、和/或偏好不选网条件。例如，选网策略信息为在电池电量大于50％时选网，小于50％时不选网。再例如，选网策略信息为漫游时不选网，非漫游时选网。再例如，选网策略信息为网络运营商为签约运营商时选网，网络运营商非签约运营商时不选网。
下面结合附图对本申请的具体实施例做详细的说明。
可以理解的是，在具体实施中，选网方法可以采用软件程序的方式实现，该软件程序运行于芯片或芯片模组内部集成的处理器中。该方法也可以采用软件结合硬件的方式实现，本申请不作限制。
实施例一：由终端设备判定终端设备无网络覆盖时是否选网。
参见图1，为本申请提供的一种选网方法的流程示意图，具体包括以下步骤：
步骤101、终端设备获取选网决策参考信息。
其中，选网决策参考信息用于判定终端设备无网络覆盖时是否选网，又可以称之为选网决策信息、选网判定参考信息等，本申请实施例对选网决策参考信息的名称不做限定。
示例的，选网决策参考信息用于指示待传输业务的业务相关信息。或者，选网决策参考信息可以包括待传输业务的业务相关信息。其中，本申请中待传输业务可以理解为有通信需求的业务。具体的，待传输业务可以包括当前正在执行的业务、和/或未来可能执行的业务。当前正在执行的业务可以理解为当前正在执行且未完成传输的业务。
例如，待传输业务的相关信息可以包括上行最大传输时延、下行最大传输时延、待传输数据的时间信息、业务类型、网络切片信息、应用程序信息、提供数据服务的网络信息中的一项或多项。
或者，选网决策参考信息可以用于指示选网偏好。例如，选网决策参考信息可以包括以下信息中的一项或多项：用户需求信息、选网行为统计信息、选网行为预测信息、选网策略信息。
在一些实施例中，终端设备可以从自身存储或设置的相关信息中获取选网决策参考信息。例如，选网决策参考信息包括用户需求信息。终端设备可以从自身存储或设置的相关信息中获取用户需求信息。示例的，终端设备可以从全球用户识别卡、移动设备或维护实体(Maintenance Entities，ME)中获取选网决策参考信息。
或者，选网决策参考信息也可以是由网络设备发送给终端设备的。即网络设备向终端设备发送选网决策参考信息。例如，选网决策参考信息包括网络切片信息，网络切片信息可以是由网络设备指示给终端设备的。再例如，选网决策参考信息用于指示选网判定结果。选 网判定结果用于表征终端设备无网络覆盖时的是否选网。
示例的，网络设备可以将选网决策参考信息携带在控制面信息中发送给终端设备。例如，控制面信息可以为非接入层(Non-Access Stratum，NAS)信令、接入层(Access Stratum，AS)信令等。更具体地，选网决策参考信息携带在NAS注册确认(Registration accept)消息中。更具体地，在NAS注册确认消息中携带最大传输时延时，可以携带时间单位和时间值。其中时间单位指示时间的计时单位，可以为秒、分钟、小时、卫星无覆盖时长等。时间值指示有多少个时间单位。例如，时间单位为1个卫星无覆盖时长，时间值为2，则表示最大传输时延为2个完整的卫星无覆盖时长；再例如，时间单位为十分之一个卫星无覆盖时长，时间值为2，则表示最大传输时延为十分之二个卫星无覆盖时长。NAS注册确认消息中还可以携带卫星标识(Identity，ID)和/或星历信息。卫星ID和星历信息用于辅助获取卫星无覆盖时长。一个卫星无覆盖时长可以通过卫星ID和星历信息等计算得到；星历信息包括卫星的高度，速度，角度，方向。星历信息也可以预先配置在终端设备中；或，星历信息也可以预先配置在网络设备中，并由网络设备将星历信息传输给终端设备。
再示例的，网络设备可以将选网决策参考信息携带在用户面信息中发送给终端设备。例如，用户面信息可以为在用户面中传输的信息等。再示例的，网络设备可以将选网决策参考信息携带在路由选择策略信息(UE Route Selection Policy，URSP)中发送给终端设备。
或者，选网决策参考信息的部分是终端设备从自身存储或设置的相关信息中获取的，选网决策参考信息的另一部分是网络设备发送给终端设备的。如，选网决策参考信息包括用户需求信息和下行最大传输时延。其中，用户需求信息是终端设备从自身存储或设置的相关信息中获取的，下行最大传输时延是网络设备发送给终端设备。
步骤102、终端设备根据选网决策参考信息，判定终端设备无网络覆盖时是否选网。
示例的，终端设备根据选网决策参考信息，判定终端设备无卫星网络覆盖时是否选网。又示例的，终端设备根据选网决策参考信息，判定终端设备无蜂窝网络覆盖时是否选网。
在一些实施例中，终端设备可以基于下列方式触发选网判定：
方式1：终端设备检测到无网络覆盖，触发根据选网决策参考信息，判定终端设备无网络覆盖时是否选网。如，终端设备检测到无网络覆盖，获取选网决策信息，然后根据选网决策参考信息，判定终端设备无网络覆盖时是否选网。在比如，终端设备可以提前获取选网决策信息，在检测到无网络覆盖，触发根据选网决策参考信息，判定终端设备无网络覆盖时是否选网。
方式2：终端设备在预测到经过第一时长后该终端设备无网络覆盖，则触发根据选网决策参考信息，判定终端设备无网络覆盖时是否选网。如，终端设备在预测到经过第一时长后该终端设备无网络覆盖，则获取选网决策信息，然后根据选网决策参考信息，判定终端设备无网络覆盖时是否选网。在比如，终端设备可以在预测到经过第一时长后该终端设备无网络覆盖之前获取选网决策信息，在预测到经过第一时长后该终端设备无网络覆盖，再根据选网决策参考信息，判定终端设备无网络覆盖时是否选网。
应理解，第一时长的单位可以为秒、无线帧、子帧、时隙、符号等，对此不做限定。以第一时长的单位为秒为例。例如，第一时长可以为2秒、4秒、6秒等。示例的，第一时长可以是通过协议预定义的，也可以是网络设备指示给终端设备，还可以是终端设备根据某一算法或策略确定的，对此不做下定。
当然，上述仅为两种触发终端设备选网判定的举例说明，并不够成对本申请实施例的限定，在本申请中还可以通过其它方式触发终端设备选网判定，对此不做限定。
进一步的，若终端设备判定无网络覆盖时选网，则终端设备无网 络覆盖时选网。也就是说，若终端设备判定无网络覆盖时选网，则终端设备在无网络覆盖时搜网，并重新选择网络。例如，若终端设备在判定无网络覆盖时选网，则无网络覆盖时终端设备可以先搜网，并在10秒后重新选择网络。再例如，若终端设备在判定无网络覆盖时选网，则无网络覆盖时终端设备可以在搜网后立即重新选择网络。又例如，若终端设备再判定无网络覆盖时选网，终端设备也可以在某一时间预测到经过第二时长后无网络覆盖，则终端设备在该时间进行搜网，并重新选择网络。当终端设备无网络覆盖或终端设备在网络覆盖的信号强度小于某一阈值时，向重新选择的网络发起网络接入流程
或者，若终端设备判定无网络覆盖时不选网，则终端设备在无网络覆盖时不选网。也就是说，若终端设备判定无网络覆盖时选网，则终端设备无网络覆盖时不搜网，也不重新选择网络。例如，若终端设备在判定无网络覆盖时选网，则无网络覆盖时终端设备不搜网，也不选择网络。再例如，对于物联网(Internet of Things，IoT)设备，若其通信需求为下载非紧急数据，那么当无卫星网络覆盖时，不搜网。
本发明实施例所称选择网络可以是指搜索网络、驻留(camp)在该网络、接收该网络的广播消息和/或向该网络注册等过程。
以选网决策参考信息用于指示待传输业务的业务相关信息、且业务相关信息为最大传输时延为例。终端设备根据选网决策参考信息，可以基于下列方式判定终端设备无网络覆盖时是否选网：
例如，若终端设备的无网络覆盖时长大于最大传输时延，终端设备判定无网络覆盖时选网。
再例如，若终端设备的无网络覆盖时长小于或等于最大传输时延，终端设备判定无网络覆盖时不选网。
例如，若终端设备的无网络覆盖时长大于或等于最大传输时延，终端设备判定无网络覆盖时选网。
再例如，若终端设备的无网络覆盖时长小于最大传输时延，终端 设备判定无网络覆盖时不选网。
在一些实施例中，终端设备的无网络覆盖时长可以是由终端设备计算或预测确定的。具体的，终端设备的无网络覆盖时长指的是终端设备在无网络覆盖区域的时长。
以选网决策参考信息用于指示选网判定结果为例。终端设备根据选网决策参考信息，可以基于下列方式判定终端设备无网络覆盖时是否选网：
例如，若选网判定结果指示选网，则终端设备判定无网络覆盖时选网。
再例如，若选网判定结果指示不选网，则终端设备判定无网络覆盖时不选网。
需要说明的是，在选网决策参考信息指示选网判定结果的情况下，选网决策参考信息可以为1比特信息，如0、或1。例如，若选网决策参考信息为1，指示选网。再例如，若选网决策参考信息为0，指示不选网。当然，选网决策参考也可以为至少两比特信息，本申请对此不做限定。
以选网决策参考信息用于指示选网偏好为例。终端设备根据选网决策参考信息，可以基于下列方式判定终端设备无网络覆盖时是否选网：
例如，若选网决策参考信息指示偏好选网，则终端设备判定无网络覆盖时选网。
再例如，若选网决策参考信息指示偏好不选网，则终端设备判定无网络覆盖时不选网。以选网决策参考信息包括用户需求信息为例。用户需求信息可以指示选网偏好。终端设备根据选网决策参考信息，可以基于下列方式判定终端设备无网络覆盖时是否选网：
例如，若用户需求信息指示偏好选网，则终端设备判定无网络覆 盖时选网。再例如，若用户需求信息指示偏好不选网，则终端设备判定无网络覆盖时不选网。
以选网决策参考信息包括选网行为统计信息为例，终端设备根据选网决策参考信息，可以基于下列方式判定终端设备无网络覆盖时是否选网：
例如，若选网行为统计信息指示终端设备在同一卫星覆盖区域内最近一周内的历史行为是选网，则终端设备判定无网络覆盖时选网。再例如，若选网行为统计信息指示终端设备在同一卫星覆盖区域内最近一周内的历史行为是不选网，则终端设备判定无网络覆盖时不选网。
以选网决策参考信息包括选网行为预测信息为例，终端设备根据选网决策参考信息，可以基于下列方式判定终端设备无网络覆盖时是否选网：
例如，若行为预测信息表示偏好选网的概率为0.9以及偏好不选网的概率为0.1，则终端设备判定无网络覆盖时选网。
以选网决策参考信息包括选网策略信息为例，终端设备根据选网决策参考信息，可以基于下列方式判定终端设备无网络覆盖时是否选网：
例如，若选网策略信息为在电池电量大于50％时选网，小于50％时不选网，则终端设备先判断电池的电量；若电池电量大于50％，则终端设备判定无网络覆盖时选网。
以选网决策参考信息包括业务类型为例。业务类型具有传输时延。终端设备根据选网决策参考信息，可以基于下列方式判定终端设备无网络覆盖时是否选网：
例如，若终端设备的无网络覆盖时长大于该传输时延，终端设备判定无网络覆盖时选网。再例如，若终端设备的无网络覆盖时长小于或等于该传输时延，终端设备判定无网络覆盖时不选网。
相应地，待传输数据的时间信息、网络切片信息、应用程序信息和提供数据服务的网络信息均能够指示传输时延，选网决策参考信息包括上述信息时，终端设备根据选网决策参考信息判定终端设备无网络覆盖时是否选网的方式与上述过程类似，此处不再赘述。
进一步地，选网决策参考信息包括多种信息时，如果多种信息指示多种传输时延，则终端设备可以选取多种传输时延的最大值，该最大值用于判定无网络覆盖时是否选网。或者，终端设备也可以选取多种传输时延的最小值，该最小值用于判定无网络覆盖时是否选网。
如果多种信息指示多种选网偏好，则终端设备可以从多种选网偏好中随机选取一种选网偏好，以用于判定无网络覆盖时是否选网。
如果多种信息指示选网偏好和传输时延，则终端设备可以使用该传输时延判定无网络覆盖时是否选网；也可以使用该选网偏好判定无网络覆盖时是否选网。
例如选网决策参考信息包括下行最大传输时延和网络切片信息，且网络切片信息所用于执行业务的传输时延与下行最大传输时延不同，那么终端设备可以选取业务的传输时延与下行最大传输时延中的最大值，并将该最大值与无网络覆盖时长进行比较确定是否选网。
实施例二：由网络设备判定无网络覆盖时是否选网。
参见图2，为本申请提供的一种选网方法的流程示意图，具体包括以下步骤：
步骤201、网络设备获取选网决策参考信息。
具体的，关于选网决策参考信息可以参见图1中的相关介绍，在此再赘述。
在一些实施例中，选网决策参考信息可以是由终端设备发送给网络设备。即，终端设备向网络设备发送选网决策参考信息。例如，选网决策参考信息包括用户需求信息。终端设备向网络设备发送用户需 求信息。示例的，终端设备可以将选网决策参考信息携带在上行消息中发送给网络设备。
或者，选网决策参考信息可以是网络设备从其它设备或核心网网元获取的。例如，选网决策参考信息包括最大传输延迟。网络设备从应用功能获取选网决策参考信息；或者，网络设备从UDM获取选网决策参考信息。
步骤202、网络设备根据选网决策参考信息，判定终端设备无网络覆盖时是否选网。
具体的，网络设备根据选网决策参考信息，判定终端设备无网络覆盖时是否选网的具体实现方式可以参见图1中终端设备根据选网决策参考信息，判定终端设备无网络覆盖时是否选网的具体实现方式的相关说明，在此不再赘述。
在一些实施例中，网络设备可以通过下述方式触发根据选网决策参考信息，判定终端设备无网络覆盖时是否选网：
方式1：网络设备检测到无网络覆盖，触发根据选网决策参考信息，判定终端设备无网络覆盖时是否选网。如，网络设备检测到无网络覆盖，获取选网决策信息，然后根据选网决策参考信息，判定终端设备无网络覆盖时是否选网。在比如，网络设备可以提前获取选网决策信息，在检测到无网络覆盖，触发根据选网决策参考信息，判定终端设备无网络覆盖时是否选网。
方式2：网络设备在预测到经过第一时长后该终端设备无网络覆盖，则触发根据选网决策参考信息，判定终端设备无网络覆盖时是否选网。如，网络设备在预测到经过第一时长后该终端设备无网络覆盖，则获取选网决策信息，然后根据选网决策参考信息，判定终端设备无网络覆盖时是否选网。在比如，网络设备可以在预测到经过第一时长后该终端设备无网络覆盖之前获取选网决策信息，在预测到经过第一时长后该终端设备无网络覆盖，再根据选网决策参考信息，判定终端 设备无网络覆盖时是否选网。
当然，上述仅为两种触发网络设备选网判定的举例说明，并不够成对本申请实施例的限定，在本申请中还可以通过其它方式触发网络设备选网判定，对此不做限定。
进一步的，在本申请的另一些实施例中，网络设备发送选网判定指示信息。对应的，终端设备接收选网判定指示信息。其中，选网判定指示信息用于指示选网判定结果。
例如，终端设备接收到选网判定指示信息，若选网判定结果指示选网，则终端设备判定无网络覆盖时选网。再例如，若选网判定结果指示不选网，则终端设备判定无网络覆盖时不选网。
实施例三：由终端设备判定终端设设备无网络覆盖时是否选网，通过控制面信息发送选网策略参考信息。
如图3所示，为本申请提供的另一种选网方法的流程示意图，具体包括以下步骤：
步骤301，AF向UDM发送选网决策参考信息。
例如，AF通过接口网络曝光功能(Network Exposure Function，NEF)向UDM发送选网决策参考信息。
步骤302，UDM向接入和移动性管理功能发送选网决策参考信息。
例如，UDM可以通过容器发送向AMF选网决策参考信息，以使选网决策参考信息能够被加密或完整性保护，保证选网决策参考信息的传输安全。
步骤303，AMF向终端设备发送选网决策参考信息。
例如，AMF可以将选网决策参考信息携带在控制面信息中发送给终端设备。如，控制面信息可以为非接入层信令。再比如，控制面 信息也可以为无线资源控制信令。
示例性地，若选网决策参考信息为最大传输时延，控制面信息为NAS注册确认消息，则NAS注册确认消息中可以携带时间单位和时间值。
进一步地，AMF可以将选网决策参考信息携带在移动性管理过程中的下行信令中发送给终端设备。具体而言，移动性管理过程包括以下过程：注册过程，去注册过程，配置更新过程，服务过程，通知过程，鉴权过程，身份认证过程，安全过程，5G系统移动管理状态过程，非接入层传输过程，漫游导引(Steering of Roaming，SOR)过程，中继过程等。
步骤304，终端设备根据选网决策参考信息判定终端设备无网络覆盖时是否选网。
在一个可选实施例中，AF也可以直接将选网决策参考信息至AMF。
此外，图3所示的选网方法中的AMF可以替换为SMF，即由SMF向终端设备发送选网决策参考信息。在这种情况下，选网方法的具体流程可以如4所示，具体包括以下步骤：
步骤401，AF向UDM发送选网决策参考信息。
步骤402，UDM向SMF发送选网决策参考信息。
步骤403，SMF向终端设备发送选网决策参考信息。
例如，SMF可以在控制面信息中携带选网决策参考信息。控制面信息为非接入层信令或无线资源控制信令。进一步地，SMF可以在会话管理过程中的下行信令中携带选网决策参考信息。具体而言，会话管理过程包括以下过程：会话建立过程，会话修改过程，会话释放过程，会话鉴权过程，服务级别的鉴权过程，会话状态过程，终端设备报告过程等。
示例性地，若选网决策参考信息为最大传输时延，控制面信息为NAS注册确认消息，则NAS注册确认消息中可以携带时间单位和时间值。
步骤404，终端设备根据选网决策参考信息判定终端设备无网络覆盖时是否选网。
实施例四：由终端设备判定终端设设备无网络覆盖时是否选网，通过用户面信息发送选网策略参考信息。
如图5所示，为本申请提供的另一种选网方法的流程示意图，具体包括以下步骤
步骤501，终端设备通过核心网与AF建立分组数据单元会话。
步骤502，AF基于PDU会话，向终端设备发送用户面信息，用户面信息包括选网决策参考信息。
步骤503，终端设备接收到用户面信息，根据选网决策参考信息，判定终端设备无网络覆盖时是否选网。
示例的，终端设备通应用程序接收用户面信息，然后由应用程序将选网策略参考信息发送给非接入层(如NAS层)。由非接入层根据选网决策信息，进行终端设备无网络覆盖时是否选网的判定。例如，应用层可以通过AT命令将选网策略参考信息发送给非接入层。
需要说明的是，在终端设备中，也可以是其他功能单元用于进行是否选网的判定，在这种情况下，应用程序将选网决策参考信息发送至该功能单元，以供该功能单元进行是否选网的判定。
实施例五：由终端设备判定终端设设备无网络覆盖时是否选网，选网策略参考信息由终端设备从用户设置的相关信息中获取。
如图6所示，为本申请实施例提供的一种选网方法的流程示意图，具体包括以下步骤：
步骤601、终端设备从全球用户识别卡、移动设备或维护实体中获取选网决策参考信息。
步骤602、终端设备根据选网决策参考信息，判定终端设备无网络覆盖时是否选网。
具体地，全球用户识别卡、移动设备或维护实体中可以存储有指示选网偏好的选网决策参考信息。其中，维护实体可以是UDM、统一数据存储库(Unified Data Repository，UDR)或AF；维护实体也可以是网络设备侧专门用于维护选网决策信息的功能。
在这种情况下，终端设备可以基于下列方式判定终端设备无网络覆盖时是否选网：例如，若选网决策参考信息指示偏好选网，则终端设备判定无网络覆盖时选网。再例如，若选网决策参考信息指示偏好不选网，则终端设备判定无网络覆盖时不选网。
实施例六：由终端设备判定终端设设备无网络覆盖时是否选网，策略控制功能发送选网策略参考信息。
如图7所示，为本申请提供的另一种选网方法的流程示意图，具体包括以下步骤：
步骤701，AF向PCF发送选网决策参考信息。
具体地，AF通过接口网络曝光功能(Network Exposure Function，NEF)发送选网决策参考信息。
相应地，PCF接收选网决策参考信息，并根据选网决策参考信息确定路由选择策略信息，路由选择策略信息包括选网决策参考信息的部分或全部。
步骤702，PCF向终端设备发送路由选择策略信息。
步骤703，终端设备根据选网决策参考信息判定终端设备无网络覆盖时是否选网。
在一个可选实施例中，也可以由接入和移动性管理功能转发来自PCF的选网决策参考信息至终端设备。
实施例七：由UDM判定终端设设备无网络覆盖时是否选网。
如图8所示，为本申请提供的另一种选网方法的流程示意图，具体包括以下步骤：
步骤801，AF向UDM发送选网决策参考信息。
步骤802，UDM根据选网决策参考信息判定终端设备无网络覆盖时是否选网，并生成选网判定指示信息。选网判定指示信息用于指示选网判定结果。具体地，选网判定结果包括选网或不选网。
步骤803，UDM向接入和AMF发送选网判定指示信息。
步骤804，AMF向终端设备发送选网判定指示信息。
步骤805，终端设备根据选网判定指示信息执行选网或不执行选网。
需要说明的是，本申请中选网策略参考信息的部分可以是部分由其它设备(如核心网设备、或其它网络设备)发送给用于选网判定的设备的，部分是用于选网判定的设备从自身设置或存储的相关信息中获取的；或者，选网策略参考信息的全部是由其它设备(如核心网设备、或其它网络设备)发送给用于选网判定的设备的；或者，选网策略参考信息的全部是用于选网判定的设备从自身设置或存储的相关信息中获取的，对此不做限定。
实施例八、由终端设备中的应用处理器获取选网决策参考信息。终端设备包括调制解调器和应用处理器，调制解调器用于判定终端设备无网络覆盖时是否选网。
请参照图9，为本申请提供的另一种选网方法的流程示意图，具体包括以下步骤：
步骤901，应用处理器获取选网决策参考信息。
具体地，选网决策参考信息可以来自于网络设备，也可以来自全球用户识别卡、移动设备或维护实体中的配置信息；或者选网决策参考信息的一部分来自网络设备，另一部分来自全球用户识别卡、移动设备或维护实体中的配置信息。
步骤902，应用处理器向调制解调器发送选网决策参考信息。
例如，选网决策参考信息可以携带于AT命令中。在这种情况下，应用处理器向调制解调器发送AT命令，AT命令包括选网决策参考信息。
再例如，应用处理器也可以通过专用用户接口向调制解调器发送选网决策参考信息。
步骤903，调制解调器根据选网决策参考信息判定终端设备无网络覆盖时是否选网。
以上各个实施例可以单独使用，也可以相互结合使用，以实现不同的技术效果。
以终端设备进行选网判定为例。例如，对于选网策略参考信息的一部分可以是由网络设备指示的，另一部分可以是终端设备从自身存储或设置的相关信息中获取的。在这种情况下，终端设备获取由网络设备指示的选网策略参考信息的部分的可以参考上述图3、图4、图5、图7和图8等中的选网策略参考信息的相关具体实现方式，终端设备从自身存储或设置的相关信息中获取的选网策略参考信息的部分可以参考图6和图9等中选网策略参考信息的相关具体实现方式。
以网络设备进行选网判定为例。类似的，如，对于选网策略参考信息的一部分可以是由终端设备上报的，另一部分可以是网络设备从自身存储或设置的相关信息中获取的、或者是从其它网络设备获取的。
关于本申请实施例的更多具体实现方式，请参照前述实施例，此处不再赘述。
请参照图10，图10示出了一种通信装置100，通信装置100可以包括：
通信模块1001，用于获取选网决策参考信息；
处理模块1002，用于根据所述选网决策参考信息判定终端设备无网络覆盖时是否选网。
在具体实施中，上述通信装置100可以对应于终端设备或网络设备中具有选网功能的芯片，例如片上系统(System-On-a-Chip，SOC)、基带芯片等；或者对应于终端设备中包括具有选网功能的芯片模组；或者对应于具有数据处理功能芯片的芯片模组，或者对应于终端设备，或者对应于网络设备。
本申请还公开了另一种通信装置，通信装置可以包括：通信模块，用于发送选网决策参考信息的部分或全部，选网决策参考信息用于判定终端设备无网络覆盖时是否选网。
关于通信装置的其他相关描述可以参照前述实施例中的相关描述，此处不再赘述。
关于上述实施例中描述的各个装置、产品包含的各个模块/单元，其可以是软件模块/单元，也可以是硬件模块/单元，或者也可以部分是软件模块/单元，部分是硬件模块/单元。例如，对于应用于或集成于芯片的各个装置、产品，其包含的各个模块/单元可以都采用电路等硬件的方式实现，或者，至少部分模块/单元可以采用软件程序的方式实现，该软件程序运行于芯片内部集成的处理器，剩余的(如果有)部分模块/单元可以采用电路等硬件方式实现；对于应用于或集成于芯片模组的各个装置、产品，其包含的各个模块/单元可以都采用电路等硬件的方式实现，不同的模块/单元可以位于芯片模组的同一组件(例如芯片、电路模块等)或者不同组件中，或者，至少部分 模块/单元可以采用软件程序的方式实现，该软件程序运行于芯片模组内部集成的处理器，剩余的(如果有)部分模块/单元可以采用电路等硬件方式实现；对于应用于或集成于终端设备的各个装置、产品，其包含的各个模块/单元可以都采用电路等硬件的方式实现，不同的模块/单元可以位于终端设备内同一组件(例如，芯片、电路模块等)或者不同组件中，或者，至少部分模块/单元可以采用软件程序的方式实现，该软件程序运行于终端设备内部集成的处理器，剩余的(如果有)部分模块/单元可以采用电路等硬件方式实现。
本申请实施例还公开了一种存储介质，所述存储介质为计算机可读存储介质，其上存储有计算机程序，所述计算机程序运行时可以执行图1至图9中所示方法的步骤。所述存储介质可以包括只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁盘或光盘等。存储介质还可以包括非挥发性存储器(non-volatile)或者非瞬态(non-transitory)存储器等。
请参照图11，本申请实施例还提供了一种通信装置的硬件结构示意图。该装置包括处理器1101、存储器1102和收发器1103。需要说明的是，该通信装置可以为芯片、芯片模组或通信设备等。
处理器1101可以是一个通用中央处理器(central processing unit，CPU)、微处理器、特定应用集成电路(application-specific integrated circuit，ASIC)，或者一个或多个用于控制本申请方案程序执行的集成电路。处理器1101也可以包括多个CPU，并且处理器1101可以是一个单核(single-CPU)处理器，也可以是多核(multi-CPU)处理器。这里的处理器可以指一个或多个设备、电路或用于处理数据(例如计算机程序指令)的处理核。
存储器1102可以是ROM或可存储静态信息和指令的其他类型的静态存储设备、RAM或者可存储信息和指令的其他类型的动态存储设备，也可以是电可擦可编程只读存储器(electrically erasable programmable read-only memory，EEPROM)、只读光盘(compactdisc  read-only memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，本申请实施例对此不作任何限制。存储器1102可以是独立存在(此时，存储器1102可以位于该装置外，也可以位于该装置内)，也可以和处理器1101集成在一起。其中，存储器1102中可以包含计算机程序代码。处理器1101用于执行存储器1102中存储的计算机程序代码，从而实现本申请实施例提供的方法。
处理器1101、存储器1102和收发器1103通过总线相连接。收发器1103用于与其他设备或通信网络通信。可选的，收发器1103可以包括发射机和接收机。收发器1103中用于实现接收功能的器件可以视为接收机，接收机用于执行本申请实施例中的接收的步骤。收发器1103中用于实现发送功能的器件可以视为发射机，发射机用于执行本申请实施例中的发送的步骤。
当图11所示的结构示意图用于示意上述实施例中所涉及的终端设备的结构时，处理器1101用于对终端设备的动作进行控制管理，例如，处理器1101用于支持终端设备执行图1中的步骤111和步骤112，或者图3中的步骤303、步骤304，或者图4中的步骤403、步骤404，或者图5中的步骤503、步骤504或者图6中的步骤601、步骤602，或者图7中的步骤702、步骤703，或者图8中的步骤804、步骤805，或者图9中的步骤902和步骤903，和/或本申请实施例中所描述的其他过程中的终端设备执行的动作。处理器1101可以通过收发器1103与其他网络实体通信，例如，与上述网络设备通信。存储器1102用于存储终端设备的程序代码和数据。
当图11所示的结构示意图用于示意上述实施例中所涉及的网络设备的结构时，处理器1101用于对网络设备的动作进行控制管理，例如，处理器1101用于支持网络设备执行图2中的步骤201和步骤 202，图3中的步骤301、步骤302和步骤303，或者图4中的步骤401、步骤402和步骤403，或者图5中的步骤501、步骤502和步骤503，或者图7中的步骤701和步骤702，或者图8中的步骤801、步骤802、步骤803和步骤804，或者图9中的步骤901或者步骤902，和/或本申请实施例中所描述的其他过程中的网络设备执行的动作。处理器1101可以通过收发器1103与其他网络实体通信，例如，与上述终端设备通信。存储器1102用于存储网络设备的程序代码和数据。
本申请实施例定义接入网到终端设备的单向通信链路为下行链路，在下行链路上传输的数据为下行数据，下行数据的传输方向称为下行方向；而终端设备到接入网的单向通信链路为上行链路，在上行链路上传输的数据为上行数据，上行数据的传输方向称为上行方向。
应理解，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/“，表示前后关联对象是一种“或”的关系。
本申请实施例中出现的“多个”是指两个或两个以上。
本申请实施例中的“等于”可以与“大于”连用，也可以与“小于”连用，本申请对此不作限制。当“等于”与“大于”连用时，采用“大于”的技术方案；当“等于”与“小于”连用时，采用“小于”的技术方案。
本申请实施例中出现的第一、第二等描述，仅作示意与区分描述对象之用，没有次序之分，也不表示本申请实施例中对设备个数的特别限定，不能构成对本申请实施例的任何限制。
本申请实施例中出现的“连接”是指直接连接或者间接连接等各种连接方式，以实现设备间的通信，本申请实施例对此不做任何限定。
上述实施例，可以全部或部分地通过软件、硬件、固件或其他任意组合来实现。当使用软件实现时，上述实施例可以全部或部分地以 计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令或计算机程序。在计算机上加载或执行所述计算机指令或计算机程序时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以为通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线或无线方式向另一个网站站点、计算机、服务器或数据中心进行传输。
应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
在本申请所提供的几个实施例中，应该理解到，所揭露的方法、装置和系统，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的；例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式；例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理包括，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。
上述以软件功能单元的形式实现的集成的单元，可以存储在一个计算机可读取存储介质中。上述软件功能单元存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的部分步骤。
虽然本申请披露如上，但本申请并非限定于此。任何本领域技术人员，在不脱离本申请的精神和范围内，均可作各种更动与修改，因此本申请的保护范围应当以权利要求所限定的范围为准。

Claims (28)

  1. 一种选网方法，其特征在于，所述方法包括：
    获取选网决策参考信息；
    根据所述选网决策参考信息判定终端设备无网络覆盖时是否选网。
  2. 根据权利要求1所述的方法，其特征在于，所述选网决策参考信息用于指示待传输业务的业务相关信息。
  3. 根据权利要求2所述的方法，其特征在于，所述业务相关信息包括最大传输延迟；所述根据所述选网决策参考信息判定终端设备无网络覆盖时是否选网，包括：
    若所述终端设备的无网络覆盖时长大于所述最大传输时延，则判定所述终端设备无网络覆盖时选网；
    和/或，若所述终端设备的无网络覆盖时长小于或等于所述最大传输时延，则判定所述终端设备无网络覆盖时不选网。
  4. 根据权利要求2所述的方法，其特征在于，所述业务相关信息包括以下信息中的至少一项：
    下行最大传输时延、上行最大传输时延、待传输数据的时间信息、业务类型、网络切片信息、应用程序信息、提供数据服务的网络信息。
  5. 根据权利要求1至4任一项所述的方法，其特征在于，还包括：
    发送选网判定指示信息，所述选网判定指示信息用于指示选网判定结果。
  6. 根据权利要求1所述的方法，其特征在于，所述获取选网决策参考信息，包括：
    接收所述选网决策参考信息，所述选网决策参考信息用于指示选网判定结果。
  7. 根据权利要求6所述的方法，其特征在于，所述根据所述选网决策参考信息判定终端设备无网络覆盖时是否选网，包括：
    若所述选网判定结果指示选网，则判定所述终端设备无网络覆盖时选网；和/或，
    若所述选网判定结果指示不选网，则判定所述终端设备无网络覆盖时不选网。
  8. 根据权利要求1所述的方法，其特征在于，所述选网决策参考信息用于指示选网偏好；所述根据所述选网决策参考信息判定终端设备无网络覆盖时是否选网，包括：
    如果所述选网决策参考信息指示偏好选网，则判定所述终端设备无网络覆盖时选网；和/或，
    如果所述选网决策参考信息指示偏好不选网，则判定所述终端设备无网络覆盖时不选网。
  9. 根据权利要求8所述的方法，其特征在于，所述选网决策参考信息包括以下一种或多种内容：
    用户需求信息、选网行为统计信息、选网行为预测信息、选网策略信息。
  10. 根据权利要求1或2所述的方法，其特征在于，所述获取选网决策参考信息，包括：
    接收控制面信息，所述控制面信息包括所述选网决策参考信息的部分或全部；或者，
    接收用户面信息，所述用户面信息包括所述选网决策参考信息的部分或全部；或者，
    接收路由选择策略信息，所述路由选择策略信息包括所述选网决策参考信息的部分或全部；或者，
    获取存储在全球用户识别卡、移动设备或维护实体中的配置信息，所述配置信息包括所述选网决策参考信息的部分或全部。
  11. 根据权利要求10所述的方法，其特征在于，所述控制面信息为非接入层信令或无线资源控制信令。
  12. 根据权利要求1所述的方法，其特征在于，所述终端设备包括调制解调器和应用处理器；
    所述获取选网决策参考信息，包括：
    所述应用处理器获取所述选网决策参考信息部分或全部；
    所述应用处理器向所述调制解调器发送注意力AT命令，所述AT命令包括所述选网决策参考信息部分或全部；
    所述根据所述选网决策参考信息判定所述终端设备无网络覆盖时是否选网，包括：
    所述调制解调器根据所述选网决策参考信息，判定所述终端设备无网络覆盖时是否选网。
  13. 根据权利要求1所述的方法，其特征在于，所述根据所述选网决策参考信息判定终端设备无网络覆盖时是否选网，包括：
    若所述终端设备当前无网络覆盖，则根据所述选网决策参考信息判定所述终端设备无网络覆盖时是否选网；或者，
    若经过第一时长后所述终端设备无网络覆盖，则根据所述选网决策参考信息判定所述终端设备无网络覆盖时是否选网。
  14. 根据权利要求1所述的方法，其特征在于，所述根据所述选网决策参考信息判定终端设备无网络覆盖时是否选网，包括：
    根据所述选网决策参考信息判定终端设备无卫星网络覆盖时是否选网。
  15. 一种发送方法，其特征在于，所述方法包括：
    发送选网决策参考信息的部分或全部，所述选网决策参考信息用于判定终端设备无网络覆盖时是否选网。
  16. 根据权利要求15所述的方法，其特征在于，所述选网决策参考信息用于指示待传输业务的业务相关信息。
  17. 根据权利要求16所述的方法，其特征在于，所述业务相关信息包括以下信息中的至少一项：
    下行最大传输时延、上行最大传输时延、待传输数据的时间信息、业务类型、网络切片信息、应用程序信息、提供数据服务的网络信息。
  18. 根据权利要求15所述的方法，其特征在于，所述选网决策参考信息用于指示选网判定结果。
  19. 根据权利要求15所述的方法，其特征在于，所述选网决策参考信息用于指示选网偏好。
  20. 根据权利要求19所述的方法，其特征在于，所述述选网决策参考信息包括以下一种或多种内容：
    用户需求信息、选网行为统计信息、选网行为预测信息、选网策略信息。
  21. 根据权利要求15所述的方法，其特征在于，所述发送选网决策参考信息的部分或全部，包括：
    发送控制面信息，所述控制面信息包括所述选网决策参考信息的部分或全部；或者，
    发送用户面信息，所述用户面信息包括所述选网决策参考信息的部分或全部；或者，
    发送路由选择策略信息，所述路由选择策略信息包括所述选网决策参考信息的部分或全部；或者，
    发送存储在全球用户识别卡全球用户识别卡、移动设备或维护实 体中的配置信息，所述配置信息包括所述选网决策参考信息的部分或全部。
  22. 根据权利要求21所述的方法，其特征在于，所述控制面信息为非接入层信令或无线资源控制信令。
  23. 根据权利要求15所述的方法，其特征在于，所述选网决策参考信息用于判定终端设备无卫星网络覆盖时是否选网。
  24. 一种通信装置，其特征在于，包括：
    通信模块，用于获取选网决策参考信息；
    处理模块，用于根据所述选网决策参考信息判定终端设备无网络覆盖时是否选网。
  25. 一种通信装置，其特征在于，包括：
    通信模块，用于发送选网决策参考信息的部分或全部，所述选网决策参考信息用于判定终端设备无网络覆盖时是否选网。
  26. 一种计算机可读存储介质，其上存储有计算机程序，其特征在于，所述计算机程序被处理器运行时执行权利要求1至14中任一项所述选网方法的步骤，或者执行权利要求15至23任一项所述发送方法的步骤。
  27. 一种通信装置，包括存储器和处理器，所述存储器上存储有可在所述处理器上运行的计算机程序，其特征在于，所述处理器运行所述计算机程序时执行权利要求1至14中任一项所述选网方法的步骤。
  28. 一种通信装置，包括存储器和处理器，所述存储器上存储有可在所述处理器上运行的计算机程序，其特征在于，所述处理器运行所述计算机程序时执行权利要求15至23任一项所述发送方法的步骤。
PCT/CN2023/118485 2022-09-14 2023-09-13 选网方法、发送方法、通信装置及计算机可读存储介质 WO2024055981A1 (zh)

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