WO2022193240A1 - 网络选择的方法、终端设备和网络设备 - Google Patents

网络选择的方法、终端设备和网络设备 Download PDF

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Publication number
WO2022193240A1
WO2022193240A1 PCT/CN2021/081587 CN2021081587W WO2022193240A1 WO 2022193240 A1 WO2022193240 A1 WO 2022193240A1 CN 2021081587 W CN2021081587 W CN 2021081587W WO 2022193240 A1 WO2022193240 A1 WO 2022193240A1
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Prior art keywords
plmn
channel quality
information
terminal device
priority
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PCT/CN2021/081587
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English (en)
French (fr)
Inventor
付喆
田文强
Original Assignee
Oppo广东移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to CN202180076905.5A priority Critical patent/CN116458210A/zh
Priority to PCT/CN2021/081587 priority patent/WO2022193240A1/zh
Publication of WO2022193240A1 publication Critical patent/WO2022193240A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration

Definitions

  • the embodiments of the present application relate to the field of communications, and in particular, to a method for network selection, a terminal device, and a network device.
  • the non-access stratum (NAS) of the terminal performs network selection (ie PLMN selection) based on the priority ordering of the Public Land Mobile Network (PLMN).
  • PLMN Public Land Mobile Network
  • the priority of the PLMN is that the registered PLMN (Registered PLMN, RPLMN) is higher than the home PLMN (Home PLMN, HPLMN) or the first equivalent home PLMN (the first EHPLMN).
  • the present application provides a method for network selection, terminal equipment and network equipment, which are conducive to selecting a suitable PLMN, thereby ensuring stable transmission of services of the terminal equipment.
  • a method for network selection including: a terminal device selects a PLMN according to the priority ordering of the public land mobile network PLMN and/or the channel quality information of the PLMN.
  • a method for network selection including: a network device sending indication information to a terminal device, where the indication information is used to instruct the terminal device to select a manner of a public land mobile network PLMN.
  • a terminal device for executing the method in the above-mentioned first aspect or each implementation manner thereof.
  • the terminal device includes a functional module for executing the method in the above-mentioned first aspect or each implementation manner thereof.
  • a network device for executing the method in the second aspect or each of its implementations.
  • the network device includes functional modules for executing the methods in the second aspect or the respective implementation manners thereof.
  • a terminal device including a processor and a memory.
  • the memory is used for storing a computer program
  • the processor is used for calling and running the computer program stored in the memory to execute the method in the above-mentioned first aspect or each implementation manner thereof.
  • a network device including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the method in the second aspect or each of its implementations.
  • a chip is provided for implementing any one of the above-mentioned first aspect to the second aspect or the method in each implementation manner thereof.
  • the chip includes: a processor for invoking and running a computer program from a memory, so that a device in which the device is installed executes any one of the above-mentioned first to second aspects or each of its implementations method.
  • a computer-readable storage medium for storing a computer program, the computer program causing a computer to execute the method in any one of the above-mentioned first aspect to the second aspect or each of its implementations.
  • a computer program product comprising computer program instructions, the computer program instructions causing a computer to execute the method in any one of the above-mentioned first to second aspects or the implementations thereof.
  • a computer program which, when run on a computer, causes the computer to perform the method in any one of the above-mentioned first to second aspects or the respective implementations thereof.
  • the terminal device selects PLMN according to the priority ordering of the PLMN of the public land mobile network and/or the channel quality information of the PLMN, which is conducive to selecting a suitable PLMN, thereby ensuring the stable transmission of subsequent services of the terminal device.
  • FIG. 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application.
  • FIG. 2 is a schematic flowchart of a method for network selection according to an embodiment of the present application.
  • FIG. 3 is a schematic flowchart of another method for network selection according to an embodiment of the present application.
  • FIG. 4 is a schematic block diagram of a terminal device provided according to an embodiment of the present application.
  • FIG. 5 is a schematic block diagram of a network device provided according to an embodiment of the present application.
  • FIG. 6 is a schematic block diagram of a communication device provided according to an embodiment of the present application.
  • FIG. 7 is a schematic block diagram of a chip provided according to an embodiment of the present application.
  • FIG. 8 is a schematic block diagram of a communication system provided according to an embodiment of the present application.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • CDMA Wideband Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced Long Term Evolution
  • NR New Radio
  • NTN Non-Terrestrial Networks
  • UMTS Universal Mobile Telecommunication System
  • WLAN Wireless Local Area Networks
  • Wireless Fidelity Wireless Fidelity
  • WiFi fifth-generation communication
  • D2D Device to Device
  • M2M Machine to Machine
  • MTC Machine Type Communication
  • V2V Vehicle to Vehicle
  • V2X Vehicle to everything
  • the communication system in this embodiment of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, a dual connectivity (Dual Connectivity, DC) scenario, or a standalone (Standalone, SA) distribution. web scene.
  • Carrier Aggregation, CA Carrier Aggregation, CA
  • DC Dual Connectivity
  • SA standalone
  • the communication system in the embodiment of the present application may be applied to an unlicensed spectrum, where the unlicensed spectrum may also be considered as a shared spectrum; or, the communication system in the embodiment of the present application may also be applied to a licensed spectrum, where, Licensed spectrum can also be considered unshared spectrum.
  • the embodiments of the present application describe various embodiments in conjunction with network equipment and terminal equipment, where the terminal equipment may also be referred to as user equipment (User Equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.
  • user equipment User Equipment, UE
  • access terminal subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.
  • the terminal device may be a station (STATION, ST) in the WLAN, and may be a cellular phone, a cordless phone, a Session Initiation Protocol (Session Initiation Protocol, SIP) phone, a Wireless Local Loop (WLL) station, a personal digital assistant (Personal Digital Assistant, PDA) devices, handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, next-generation communication systems such as end devices in NR networks, or future Terminal equipment in the evolved public land mobile network (Public Land Mobile Network, PLMN) network, etc.
  • PLMN Public Land Mobile Network
  • the terminal device can be deployed on land, including indoor or outdoor, handheld, wearable, or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as airplanes, balloons, and satellites) superior).
  • the terminal device may be a mobile phone (Mobile Phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (Virtual Reality, VR) terminal device, and an augmented reality (Augmented Reality, AR) terminal Equipment, wireless terminal equipment in industrial control, wireless terminal equipment in self driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid , wireless terminal equipment in transportation safety, wireless terminal equipment in smart city or wireless terminal equipment in smart home, etc.
  • a mobile phone Mobile Phone
  • a tablet computer Pad
  • a computer with a wireless transceiver function a virtual reality (Virtual Reality, VR) terminal device
  • augmented reality (Augmented Reality, AR) terminal Equipment wireless terminal equipment in industrial control, wireless terminal equipment in self driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid , wireless terminal equipment in transportation safety, wireless terminal equipment in smart city or wireless terminal equipment in smart home, etc.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices, which are the general term for the intelligent design of daily wear and the development of wearable devices using wearable technology, such as glasses, gloves, watches, clothing and shoes.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones.
  • the network device may be a device for communicating with a mobile device, and the network device may be an access point (Access Point, AP) in WLAN, or a base station (Base Transceiver Station, BTS) in GSM or CDMA , it can also be a base station (NodeB, NB) in WCDMA, it can also be an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or in-vehicle equipment, wearable devices and NR networks
  • the network device may have a mobile feature, for example, the network device may be a mobile device.
  • the network device may be a satellite or a balloon station.
  • the satellite may be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a High Elliptical Orbit (HEO) ) satellite etc.
  • the network device may also be a base station set in a location such as land or water.
  • a network device may provide services for a cell, and a terminal device communicates with the network device through transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell, and the cell may be a network device (
  • the cell can belong to the macro base station, or it can belong to the base station corresponding to the small cell (Small cell).
  • Pico cell Femto cell (Femto cell), etc.
  • These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.
  • the communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, a terminal).
  • the network device 110 may provide communication coverage for a particular geographic area, and may communicate with terminal devices located within the coverage area.
  • FIG. 1 exemplarily shows one network device and two terminal devices.
  • the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. This application The embodiment does not limit this.
  • the communication system 100 may further include other network entities such as a network controller and a mobility management entity, which are not limited in this embodiment of the present application.
  • network entities such as a network controller and a mobility management entity, which are not limited in this embodiment of the present application.
  • a device having a communication function in the network/system may be referred to as a communication device.
  • the communication device may include a network device 110 and a terminal device 120 with a communication function, and the network device 110 and the terminal device 120 may be the specific devices described above, which will not be repeated here.
  • the communication device may also include other devices in the communication system 100, such as other network entities such as a network controller, a mobility management entity, etc., which are not limited in this embodiment of the present application.
  • the "instruction" mentioned in the embodiments of the present application may be a direct instruction, an indirect instruction, or an associated relationship.
  • a indicates B it can indicate that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indicates B indirectly, such as A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation.
  • corresponding may indicate that there is a direct or indirect corresponding relationship between the two, or may indicate that there is an associated relationship between the two, or indicate and be instructed, configure and be instructed configuration, etc.
  • predefinition may be implemented by pre-saving corresponding codes, forms, or other means that can be used to indicate relevant information in devices (for example, including terminal devices and network devices).
  • the implementation method is not limited.
  • predefined may refer to the definition in the protocol.
  • the "protocol” may refer to a standard protocol in the communication field, for example, may include the LTE protocol, the NR protocol, and related protocols applied in future communication systems, which are not limited in this application.
  • IOT Internet of Things
  • IoT business is static.
  • IoT services can be located in remote locations with limited coverage.
  • IoT services require stable data connections as part of the measurement and control network.
  • IoT devices may be permanently roaming, for example, modules of IoT devices are installed abroad, or, intentionally, to provide the best coverage for users in any situation.
  • the UE When the UE enters the system coverage area, the UE performs a cell search procedure. Regardless of which state the UE is in (eg, connected, idle, inactive), the UE will perform cell search when moving in the system to achieve mobility.
  • the non-access stratum (Non-Access Stratum, NAS) of the UE performs network selection (ie, PLMN selection) based on the priority order of the PLMN.
  • PLMN selection ie, PLMN selection
  • the priority order of the PLMN is the registered PLMN (Registered PLMN , RPLMN) is higher than the Home PLMN (Home PLMN, HPLMN) or the first equivalent Home PLMN (the first EHPLMN).
  • the above network selection method has some problems. This is because the current network selection mechanism/roaming steering mechanism makes the UE need to select the network according to the PLMN priority even if there are other networks with better conditions (such as better channel quality conditions) available, so that the UE preferentially chooses to stay in the RPLMN network Or it is necessary to return to the RPLMN network regularly, resulting in poor connection quality of the UE, and ultimately leading to problems such as unstable UE transmission. Therefore, how to achieve high-quality network selection is an urgent problem to be solved.
  • FIG. 2 is a schematic flowchart of a method 200 for network selection according to an embodiment of the present application.
  • the method 200 may be executed by the terminal device in FIG. 1 .
  • the method 200 includes at least the following parts:
  • the terminal device selects the PLMN according to the priority ordering of the public land mobile network PLMN and/or the channel quality information of the PLMN.
  • PLMN selection is performed according to the priority ordering of the PLMN and/or the channel quality information of the PLMN.
  • the terminal device selects the PLMN according to the priority ordering of the PLMN and/or the channel quality information of the PLMN.
  • the terminal device here can be any terminal.
  • the terminal device performs PLMN selection according to the priority ordering of the PLMN and/or the channel quality information of the PLMN.
  • the specific terminal may be a terminal of a specific type, such as a terminal that supports an IOT service, or a terminal of a specific mode, such as the aforementioned permanent roaming terminal.
  • the specific service may include, but is not limited to, at least one of the following: using a logical channel (Logical Channel, LCH), a logical channel group (LCH group), quality of service flow (Quality of Service flow, QoS) flow), data radio bearer (Data Radio Bearer, DRB), protocol data unit (Protocol Data Unit, PDU) session (session) and other services characterized by similar methods.
  • LCH Logical Channel
  • LCH group logical channel group
  • QoS quality of service flow
  • DRB data radio bearer
  • PDU Protocol Data Unit
  • the specific service may include, for example, an IOT service.
  • the priority order of the PLMN may be a first PLMN priority order, and the first PLMN priority order is different from a predefined second PLMN priority order.
  • the priority order of the second PLMN may be that the RPLMN is higher than the HPLMN/the first EHPLMN.
  • the second PLMN priority ordering may be the existing PLMN priority ordering.
  • the first PLMN prioritization corresponds to a specific terminal, such as an IOT terminal.
  • PLMN selection may be performed according to the first PLMN priority ordering.
  • the first PLMN priority order corresponds to a specific service.
  • the terminal device may perform PLMN selection according to the first PLMN priority ordering.
  • the first PLMN priority corresponds to a specific service of a specific terminal
  • the specific terminal may be an IOT terminal
  • the specific service may be, for example, the service in the foregoing example.
  • the terminal device may perform PLMN selection according to the first PLMN priority ordering.
  • the first PLMN priority ordering may be indicated by the network device, or may also be predefined.
  • the network device may indicate the first PLMN priority through dedicated signaling, such as radio resource control (Radio Resource Control, RRC) signaling or non-access stratum (Non-Access Stratum, NAS) signaling, or, also
  • RRC Radio Resource Control
  • NAS Non-Access Stratum
  • SIB System Information Block
  • the network device may determine which terminal devices to set the first PLMN priority order on according to information such as the device deployment of the UE, or the type of the UE, or the type of services supported, or the location of the UE or the channel quality of the network. In this way, these terminal devices can select PLMNs based on specific PLMN priorities, which is conducive to selecting an appropriate PLMN and ensures the stability of subsequent service transmissions.
  • the priority ordering of the first PLMN may be set in the IOT terminal, or in the terminal supporting the IOT service.
  • the network device may indicate to the terminal device that the first PLMN prioritization.
  • the first PLMN prioritization may be indicated to an IOT terminal or a terminal supporting an IOT service.
  • the network device may only indicate the first PLMN priority order to a specific terminal, and other terminals may use the predefined second PLMN priority order for PLMN selection.
  • the terminal device when the terminal device is a specific terminal, the terminal device performs PLMN selection according to the first PLMN priority ordering.
  • the terminal device when the service to be transmitted by the terminal device is a specific service, the terminal device performs PLMN selection according to the first PLMN priority ordering.
  • the terminal device when the terminal device is a specific terminal and the service to be transmitted by the terminal device is a specific service, the terminal device performs PLMN selection according to the first PLMN priority ordering .
  • the terminal device may perform PLMN selection according to the first PLMN priority ordering without the indication of the network device.
  • the terminal device may perform PLMN selection according to the first PLMN priority ordering based on the indication of the network device.
  • the terminal device may receive the first indication information sent by the network device. If the first indication information indicates that PLMN selection is performed based on the first PLMN priority ordering, the terminal device performs PLMN selection according to the first PLMN priority ordering.
  • the first indication information corresponds to a specific terminal, or the first indication information corresponds to a specific service, or the first indication information corresponds to a specific service of a specific terminal.
  • the specific terminal and the specific service reference is made to the foregoing related descriptions, which are not repeated here for the sake of brevity.
  • the network device may instruct, for a specific terminal and/or a specific service, to perform PLMN selection based on the first PLMN priority ordering.
  • the first indication information is sent through system information or dedicated signaling.
  • the dedicated signaling may be NAS signaling or RRC signaling, and the present application is not limited thereto.
  • the network device may indicate whether a particular terminal and/or a particular service is subject to PLMN selection based on the first PLMN prioritization.
  • the first PLMN priority order may be further indicated, or the first PLMN priority order is predefined.
  • the network device may instruct a specific terminal and/or a specific service to perform PLMN selection based on a first PLMN priority order, and other terminals and/or services to perform PLMN selection based on a second PLMN priority order.
  • the access stratum (Access Stratum, AS) of the terminal device may search and/or measure the PLMN to obtain the search result of the PLMN and/or the channel quality information of the PLMN.
  • the channel quality information of the PLMN may include, but is not limited to, at least one of the following:
  • RSRP Reference Signal Receiving Power
  • RSRQ Reference Signal Receiving Quality
  • SINR Signal to Interference plus Noise Ratio
  • CQI Channel Quantity Indicator
  • SNR Signal to Noise Ratio
  • the AS of the terminal device may report the first information to the NAS of the terminal device, where the first information may include part or all of the search result of the PLMN and/or the channel quality information of the PLMN.
  • the search result of the PLMN may be a PLMN identifier.
  • the first information may include channel quality information of a PLMN and/or a PLMN whose channel quality satisfies the first condition.
  • the channel quality satisfying the first condition may include at least one of the following:
  • the channel quality satisfies the high quality condition, the channel quality does not satisfy the high quality condition, the channel quality is indicated as high quality.
  • the first information may include at least one of the following:
  • a high-quality indication may be configured, indicating that the PLMN has high-quality, and in this case, the channel quality information of this type of PLMN may not be reported. That is, the information c may not include the channel quality information of the PLMN in the information a.
  • the PLMN whose channel quality meets the high-quality condition may include at least one of the following:
  • the third channel quality threshold may be greater than -110dbm.
  • the PLMN whose channel quality does not meet the high-quality condition may include at least one of the following:
  • the third channel quality threshold corresponds to a specific terminal or a specific service.
  • the first information can be reported according to the third channel quality threshold.
  • the information c may include the channel quality information of the PLMN in the information b, or may also include the channel quality information of all PLMNs searched by the terminal device, or may only include the channels of the PLMN in the information a. quality information.
  • the information d may include the third channel quality threshold, or -110dbm.
  • the channel quality when the channel quality is indicated as high quality, it may be understood that the channel quality is higher than or equal to the third channel quality threshold, or higher than or equal to -110dbm.
  • the AS of the terminal device may, based on the indication of the NAS layer of the terminal device, for example, in the case of receiving the fourth indication information sent by the NAS of the terminal device, to the terminal device
  • the NAS sends the first message.
  • the AS of the terminal device may, based on the indication of the NAS layer of the terminal device, for example, in the case of receiving the third indication information sent by the NAS of the terminal device, to the terminal device
  • the NAS sends the channel quality information of the specific PLMN and/or the third channel quality threshold, wherein the third indication information is used to instruct to report the channel quality information of the specific PLMN and/or the third channel quality threshold .
  • the NAS of the terminal device can indicate to the AS of the terminal device which PLMN channel quality information needs to be reported.
  • the specific PLMN includes at least one of the following:
  • the first information may only include the aforementioned information a, that is, the terminal device may only report the PLMN with the high-quality indication, and further consider the channel quality, location, deployment, etc. of the terminal device. , when the NAS of the terminal device selects a PLMN according to the first information, it is beneficial to select an appropriate PLMN.
  • the NAS of the terminal device may perform PLMN selection according to the first information reported by the AS of the terminal device and the first PLMN priority ordering.
  • the PLMN with the highest priority among the PLMNs reported by the AS of the terminal device may be determined as the target PLMN.
  • a PLMN whose priority is higher than the first priority threshold among the PLMNs reported by the AS of the terminal device is determined as the target PLMN.
  • the terminal device may select based on the channel quality of the multiple PLMNs, for example, A PLMN with the best channel quality among the multiple PLMNs, or a PLMN with a channel quality higher than a specific channel threshold is selected as the target PLMN.
  • the first priority threshold is predefined or indicated by a network device.
  • the first priority threshold is indicated by system information or dedicated signaling, eg, NAS signaling or RRC signaling.
  • the terminal equipment selects PLMN based on the specific PLMN priority ordering (ie, the first PLMN priority ordering), which is equivalent to considering the equipment deployment situation, location and other information of the terminal equipment, which is beneficial to The terminal equipment selects an appropriate PLMN to ensure stable transmission of subsequent services.
  • the specific PLMN priority ordering ie, the first PLMN priority ordering
  • the terminal device selects the PLMN according to the priority ordering of the PLMN and the channel quality information of the PLMN.
  • the priority ordering of the PLMNs may be the aforementioned first PLMN priority ordering, or may also be the second PLMN priority ordering, which is not limited in this application.
  • the terminal device performs PLMN selection according to the priority ordering of the PLMN and the channel quality information of the PLMN based on the indication of the network device.
  • the terminal device may receive the second indication information sent by the network device, where the second indication information indicates that the PLMN is selected according to the priority ordering of the PLMN and the channel quality information of the PLMN, then the terminal device is based on the priority of the PLMN. Sorting and PLMN channel quality information for PLMN selection.
  • the second indication information corresponds to a specific terminal, or the second indication information corresponds to a specific service, or the second indication information corresponds to a specific service of a specific terminal.
  • the specific terminal and the specific service reference is made to the foregoing related descriptions, which are not repeated here for the sake of brevity.
  • the second indication information is sent through system information or dedicated signaling.
  • the dedicated signaling may be NAS signaling or RRC signaling, and the present application is not limited thereto.
  • PLMN selection may be performed according to PLMN priority ordering and PLMN channel quality information.
  • the terminal device when the terminal device is a specific terminal, the terminal device performs PLMN selection according to the priority ordering of the PLMN and the channel quality information of the PLMN.
  • the terminal device may select the PLMN according to the priority ordering of the PLMN and the channel quality information of the PLMN.
  • the terminal device selects the PLMN according to the priority ordering of the PLMN and the channel quality information of the PLMN.
  • the terminal device may be prioritized according to the PLMN and channel quality information of the PLMN.
  • the terminal device when the terminal device is a specific terminal and the service to be transmitted by the terminal device is a specific service, the terminal device performs PLMN selection according to the PLMN priority ordering and the PLMN channel quality information. For example, corresponding to the IOT service of the IOT terminal, the terminal device can select the PLMN according to the priority ordering of the PLMN and the channel quality information of the PLMN.
  • PLMN selection is performed according to the PLMN priority ordering and the PLMN channel quality information.
  • the mode selected by PLMN is set in the terminal equipment.
  • the network device may indicate whether a particular terminal and/or a particular service is to perform PLMN selection based on the PLMN prioritization and the PLMN's channel quality information.
  • the network device may instruct a specific terminal and/or a specific service to perform PLMN selection based on PLMN prioritization and PLMN channel quality information, where the PLMN prioritization may be the first PLMN prioritization or the second PLMN prioritization other terminals and/or services perform PLMN selection based on the second PLMN priority order.
  • the PLMN prioritization may be the first PLMN prioritization or the second PLMN prioritization other terminals and/or services perform PLMN selection based on the second PLMN priority order.
  • the network device may determine, according to information such as the device deployment of the UE, the location of the UE or the channel quality of the network, in which terminal devices the method of PLMN selection according to the PLMN priority ordering and the channel quality of the PLMN is set, so that these The terminal device can select the PLMN based on the PLMN priority ordering and the channel quality of the PLMN, which is conducive to selecting an appropriate PLMN and ensures the stability of subsequent service transmission.
  • the network device may instruct the terminal device to perform PLMN selection based on PLMN prioritization and PLMN channel quality according to information such as the device type of the terminal, the device deployment of the UE, the location of the UE, or the channel quality of the network.
  • the network device may only instruct a specific terminal to perform PLMN selection based on PLMN prioritization and PLMN channel quality, and other terminals may use a predefined second PLMN priority for PLMN selection.
  • the AS of the terminal device may search and/or measure the PLMN to obtain the search result of the PLMN and/or the channel quality information of the PLMN.
  • the channel quality information of the PLMN may include at least one of the following:
  • the AS of the terminal device may report the first information to the NAS of the terminal device, where the first information may include part or all of the search result of the PLMN and/or the channel quality information of the PLMN.
  • the first information may include channel quality information of a PLMN and/or a PLMN whose channel quality satisfies the first condition.
  • the channel quality satisfying the first condition may include at least one of the following:
  • the channel quality satisfies the high quality condition, the channel quality does not satisfy the high quality condition, the channel quality is indicated as high quality.
  • the first information may include at least one of the following:
  • a high-quality indication may be configured, indicating that the PLMN has high-quality, and in this case, the channel quality information of this type of PLMN may not be reported. That is, the information c may not include the channel quality information of the PLMN in the information a.
  • the PLMN whose channel quality meets the high-quality condition may include at least one of the following:
  • the third channel quality threshold may be greater than -110dbm.
  • the PLMN whose channel quality does not meet the high-quality condition may include at least one of the following:
  • the third channel quality threshold corresponds to a specific terminal or a specific service.
  • the first information can be reported according to the third channel quality threshold.
  • the information c may include the channel quality information of the PLMN in the information b, or may also include the channel quality information of all PLMNs searched by the terminal device, or may only include the channels of the PLMN in the information a. quality information.
  • the information d may include the third channel quality threshold or -110dbm.
  • the AS of the terminal device may, based on the indication of the NAS layer of the terminal device, for example, in the case of receiving the third indication information sent by the NAS of the terminal device, to the terminal device
  • the NAS sends the channel quality information of the specific PLMN and/or the third channel quality threshold, wherein the third indication information is used to instruct to report the channel quality information of the specific PLMN and/or the third channel quality threshold .
  • the NAS of the terminal device can indicate to the AS of the terminal device which PLMN channel quality information needs to be reported.
  • the specific PLMN includes at least one of the following:
  • the first information may only include the aforementioned information a, that is, the terminal device may only report the PLMN with the high-quality indication, and further consider the channel quality, location, deployment, etc. of the terminal device. , when the NAS of the terminal device selects a PLMN according to the first information, it is beneficial to select an appropriate PLMN.
  • the terminal device performs PLMN selection according to the first information in combination with the PLMN priority ordering and the channel quality information of the PLMN.
  • the terminal device performs PLMN selection in combination with the PLMN priority ordering and the channel quality information of the PLMN, including:
  • the target PLMN is determined according to the channel quality information of the PLMNs in the first PLMN set.
  • the first PLMN set may be determined according to the PLMN priority ordering, and the target PLMN may be determined in combination with the PLMN channel quality information.
  • the channel quality information of the PLMN may be the measurement result of the PLMN, such as RSRP, or may be obtained by adjusting the measurement result of the PLMN.
  • the measurement result of the PLMN can be added with a specific adjustment amount to determine the channel quality information of the PLMN, and the specific adjustment amount can be determined according to the priority order of the PLMN. For example, if the PLMN has a high priority, the corresponding adjustment amount may be a positive adjustment amount, or if the PLMN has a low priority, the corresponding adjustment amount may be 0 or a negative adjustment amount.
  • the first set of PLMNs includes at least one of the following PLMNs:
  • the priority of the PLMN is higher than the second priority threshold in the PLMN priority ordering.
  • the PLMN with the highest priority may be selected, or the PLMN with the priority higher than the second priority threshold may be selected to form the first PLMN set.
  • the second priority threshold is indicated by the network device, or is predefined.
  • the second priority threshold is indicated by system information or dedicated signaling, eg, NAS signaling or RRC signaling.
  • the second priority threshold corresponds to a specific terminal or a specific service.
  • the target PLMN includes at least one of the following:
  • the channel quality in the first PLMN set is indicated as a high-quality PLMN
  • the channel quality of the PLMN does not meet the high-quality condition.
  • the terminal device may sort the PLMNs in the PLMN search results in descending order of priority, and select PLMNs whose priorities are within a certain range (for example, higher than the second priority threshold), If the number of PLMNs satisfying the condition is one, the one PLMN can be used as the target PLMN, or, if the number of PLMNs satisfying the condition is multiple, PLMN selection can be further performed according to the channel quality of the multiple PLMNs. The channel qualities of the multiple PLMNs are sorted in descending order. In an implementation manner, the terminal device may select the PLMN with the highest channel quality.
  • the target channel quality of the PLMN with the highest priority in the first PLMN set is X1 and the corresponding adjustment amount is delta1
  • the target channel quality of the PLMN is X1+delta1
  • the channel quality of the PLMN with the second highest priority is X2
  • the corresponding adjustment amount is delta2
  • the target channel quality of the PLMN is X2+delta2
  • X1+delta1 is greater than X2+delta2
  • the PLMN with the highest priority can be selected as the target PLMN, otherwise, the PLMN with the second highest priority can be selected as the target PLMN.
  • the channel quality being indicated as high quality may include the channel quality being higher than -110 dbm, or the channel quality being higher than a third channel quality threshold.
  • a high-quality indication can be configured, and when PLMN selection is performed, a PLMN with a high-quality indication can be preferred.
  • the channel quality satisfying the high-quality condition may include: the channel quality is greater than -110 dbm, or the channel quality is higher than a third channel quality threshold.
  • the first channel quality threshold is indicated by the network device, or is predefined.
  • the network device may indicate the first channel quality threshold at the same time when instructing the terminal device to select the PLMN according to the priority of the PLMN and the channel quality information of the PLMN. That is, the first channel quality threshold and the second indication information are indicated by the same message.
  • the first channel quality threshold is indicated by system information or dedicated signaling, for example, indicated by NAS signaling or RRC signaling, but the present application is not limited thereto.
  • the terminal device performs PLMN selection in combination with the PLMN priority ordering and the channel quality information of the PLMN, including:
  • a target PLMN is determined in the second PLMN set according to the PLMN priority ordering.
  • the second PLMN set may be determined first according to the PLMN channel quality information, and the target PLMN may be determined in combination with the PLMN priority ordering.
  • the second set of PLMNs includes at least one of the following PLMNs:
  • the channel quality in the PLMN reported by the AS of the terminal device is indicated as a high-quality PLMN;
  • the channel quality of the PLMN does not meet the high-quality condition.
  • the channel quality is indicated as high-quality, and the specific description that the channel quality satisfies the high-quality condition refers to the relevant description in Mode 1, which is not repeated here.
  • the terminal device may sort the PLMNs in the PLMN search results according to the channel quality from high to low, and select the PLMNs whose channel quality is within a certain range (for example, higher than the second channel quality threshold), if the The number of conditional PLMNs is one, and the one PLMN can be used as the target PLMN, or, if the number of PLMNs satisfying the condition is multiple, PLMN selection can be further performed according to the priority of the multiple PLMNs, for example, the multiple PLMNs can be selected.
  • the priorities of the PLMNs are sorted in descending order. In an implementation manner, the terminal device may select the PLMN with the highest priority.
  • the second channel quality threshold is indicated by the network device, or is predefined.
  • the second channel quality threshold is indicated by system information or dedicated signaling.
  • the second channel quality threshold corresponds to a specific terminal or a specific service.
  • the target PLMN includes at least one of the following:
  • PLMNs in the second set of PLMNs that have a priority higher than a third priority threshold in the PLMN prioritization.
  • the third priority threshold is indicated by the network device, or is predefined.
  • the third priority threshold is indicated by system information or dedicated signaling.
  • the third channel quality threshold corresponds to a specific terminal or a specific service.
  • the first channel quality threshold, the second channel quality threshold and the third channel quality threshold may be the same or different.
  • the first priority threshold, the second priority threshold and the third priority threshold may be the same or different.
  • the terminal equipment selects PLMN based on the PLMN priority ordering and the channel quality information of the PLMN, which is equivalent to considering the equipment deployment situation, location, channel quality and other information of the terminal equipment, which is beneficial to the terminal equipment. Select an appropriate PLMN to ensure stable transmission of services.
  • Step 1 The AS of the terminal device searches and/or measures the PLMN, and obtains the search result of the PLMN and/or the channel quality information of the PLMN.
  • the terminal device may also acquire system information of the cell.
  • the system information may include first indication information, where the first indication information is used to instruct the terminal device to perform PLMN selection according to the first PLMN priority ordering.
  • the first indication information corresponds to a specific terminal, such as an IOT terminal, or a specific service, such as an IOT service.
  • the AS of the terminal device may notify the NAS of the terminal device to perform PLMN selection according to the first PLMN priority ordering.
  • the first PLMN priority order may also correspond to a specific terminal, or a specific service. In this case, it is not necessary to perform PLMN selection according to the first PLMN priority order based on an instruction of the network device.
  • the first PLMN priority ordering may be indicated by the network device, for example, indicated by the network device through system information or dedicated signaling, or predefined, such as agreed in a protocol, or set in the terminal device. .
  • the PLMN selection performed by the terminal device based on the first PLMN priority order may be based on the indication of the network device, or may also be determined according to the type of the terminal device, or the type of the service to be transmitted.
  • Step 2 The AS layer of the terminal device reports the first information to the NAS layer of the terminal device.
  • the first information may include at least one of the following:
  • PLMNs with channel quality higher than -110dbm correspond to high-quality indications
  • the channel quality information corresponding to the PLMN in the information c may be the channel quality corresponding to the PLMN in the channel b.
  • the NAS of the terminal device may not need to report the channel quality of such PLMN.
  • Step 3 The NAS of the terminal device performs PLMN selection according to the first PLMN priority ordering.
  • the PLMN with the highest priority among the reported PLMNs is selected as the target PLMN.
  • the PLMN with the highest priority and with the high-quality indication is selected as the target PLMN.
  • Step 4 The AS of the terminal device acquires the target PLMN selected by the NAS of the terminal device, and further performs cell selection or camping.
  • the terminal equipment selects PLMN based on the specific PLMN priority ordering (ie, the first PLMN priority ordering), which is equivalent to considering the equipment deployment, location, channel quality and other information of the terminal equipment. It is beneficial for the terminal equipment to select a suitable PLMN, thereby ensuring the continuous transmission of services.
  • Step 1 The AS of the terminal device searches and/or measures the PLMN, and obtains the search result of the PLMN and/or the channel quality information of the PLMN.
  • the terminal device may also acquire system information of the cell.
  • the system information may include second indication information, where the second indication information is used to instruct the terminal device to perform PLMN selection according to PLMN priority ordering and PLMN channel quality information.
  • the second indication information corresponds to a specific terminal, such as an IOT terminal, or a specific service, such as an IOT service.
  • the above PLMN selection method corresponds to a specific terminal or a specific service. In this case, it is not necessary to perform PLMN selection according to PLMN priority ranking and PLMN channel quality information based on the indication of the network device.
  • the terminal equipment performs PLMN selection based on the LMN priority ordering and the channel quality information of the PLMN, which may be based on the indication of the network equipment, or may also be determined according to the type of the terminal equipment, or according to the type of the service to be transmitted.
  • the AS of the terminal device may notify the NAS of the terminal device to perform PLMN selection according to the PLMN priority ordering and the channel quality information of the PLMN.
  • Step 2 The AS of the terminal device reports the first information to the NAS of the terminal device.
  • the first information may include at least one of the following:
  • PLMNs with channel quality higher than -110dbm correspond to high-quality indications
  • the channel quality information corresponding to the PLMN in the information c may include the channel quality corresponding to the PLMN in the channel b.
  • the NAS may not need to report the channel quality of such a PLMN.
  • the channel quality information corresponding to the PLMN in the information c may include the channel quality corresponding to all PLMNs searched by the terminal device.
  • the AS of the terminal device may report the channel quality information corresponding to all PLMNs based on the indication of the NAS of the terminal device.
  • the NAS of the terminal device can indicate to the AS of the terminal device which PLMN channel quality information needs to be reported.
  • Step 3 The NAS of the terminal device performs PLMN selection according to the PLMN priority ordering and the channel quality information of the PLMN.
  • Mode 1 The NAS of the terminal device first selects the PLMN according to the priority of the PLMN, and then selects the PLMN according to the channel quality of the PLMN.
  • the searched PLMNs are sorted from high to low priority, and at least one PLMN with a priority within a certain range is selected. If the number of the at least one PLMN is one, the one PLMN can be determined as the target PLMN. If the at least one PLMN is multiple PLMNs, the multiple PLMNs may be sorted in descending order of channel quality, and the PLMN with the highest channel quality is selected as the target PLMN.
  • Mode 2 The NAS of the terminal device first selects the PLMN according to the channel quality of the PLMN, and then selects the PLMN according to the priority of the PLMN.
  • the searched PLMNs are sorted according to the channel quality from high to low, and at least one PLMN whose channel quality is within a certain range is selected. If the number of the at least one PLMN is one, the one PLMN can be determined as the target PLMN. If the at least one PLMN is multiple PLMNs, the multiple PLMNs may be sorted in descending priority order, and the PLMN with the highest priority is selected as the target PLMN.
  • Mode 3 The NAS of the terminal device simultaneously considers the channel quality of the PLMN and the priority of the PLMN to select the PLMN.
  • the target channel quality of the PLMN with the highest priority in the searched PLMNs is X1 and the corresponding adjustment amount is delta1
  • the target channel quality is X1+delta1
  • the channel quality of the PLMN with the second highest priority is X2
  • the corresponding adjustment If the quantity is delta2, the target channel quality is X2+delta2. If X1+delta1 is greater than X2+delta2, the PLMN with the highest priority can be selected as the target PLMN, otherwise the PLMN with the second highest priority can be selected as the target PLMN.
  • Step 4 The AS of the terminal device acquires the target PLMN selected by the NAS of the terminal device, and further performs cell selection or camping.
  • the terminal equipment selects PLMN based on the PLMN priority ordering and the channel quality information of the PLMN, which is equivalent to considering the equipment deployment situation, location, channel quality and other information of the terminal equipment, which is beneficial to the terminal equipment. Select a suitable PLMN to ensure continuous transmission of services.
  • Step 1 The AS of the terminal device searches and/or measures the PLMN, and obtains the search result of the PLMN and/or the channel quality information of the PLMN.
  • the terminal device may also acquire system information of the cell.
  • the system information may include second indication information, where the second indication information is used to instruct the terminal device to perform PLMN selection according to the PLMN priority ordering and the first channel quality threshold, or the second indication information The indication information is used to instruct the terminal device to perform PLMN selection according to the PLMN priority order, the channel quality of the PLMN and the first channel quality threshold.
  • the second indication information corresponds to a specific terminal, such as an IOT terminal, or a specific service, such as an IOT service.
  • the above PLMN selection method corresponds to a specific terminal or a specific service. In this case, it is not necessary to perform PLMN selection according to PLMN priority ranking and PLMN channel quality information based on the indication of the network device.
  • the above-mentioned PLMN selection method adopted by the terminal equipment may be based on the indication of the network equipment, or may also be determined according to the type of the terminal equipment, or according to the type of the service to be transmitted.
  • the first channel quality threshold may be notified by the NAS of the terminal device to the AS of the terminal device.
  • the AS of the terminal device may notify the NAS of the terminal device to select the PLMN according to the PLMN priority order and the first channel quality threshold, or, according to the PLMN priority order, the PLMN channel quality and the first channel quality. Threshold for PLMN selection.
  • the first channel quality threshold corresponds to a specific terminal, or corresponds to a specific service.
  • different services may correspond to different first channel quality thresholds.
  • the first channel quality threshold when the first channel quality threshold corresponds to a specific terminal, the first channel quality threshold may correspond to a specific service of the specific terminal, or may also correspond to all services of the specific terminal.
  • the first channel quality threshold may be greater than -110dbm.
  • Step 2 The AS layer of the terminal device reports the first information to the NAS layer of the terminal device.
  • the first information may include at least one of the following:
  • PLMNs whose channel quality is higher than the first channel quality threshold, such PLMNs correspond to high-quality indications
  • the channel quality information corresponding to the PLMN in the information c may be the channel quality corresponding to the PLMN in the channel b.
  • the NAS may not need to report the channel quality of such a PLMN.
  • the channel quality information corresponding to the PLMN in the information c may include the channel quality corresponding to all PLMNs searched by the terminal device.
  • the channel quality information corresponding to the PLMN in the information c may include channel quality information of a PLMN whose channel quality is higher than the first channel quality threshold in the PLMNs searched by the terminal device.
  • the AS of the terminal device may report the channel quality information corresponding to all PLMNs based on the indication of the NAS of the terminal device, or report the channel quality information of the PLMNs whose channel quality is higher than the first channel quality threshold.
  • the NAS of the terminal device can indicate to the AS of the terminal device which PLMN channel quality information needs to be reported.
  • the first information may only include PLMNs whose channel quality is higher than the first channel quality threshold, that is, only PLMNs with high-quality indications are reported, which can reduce signaling overhead and facilitate NAS selection. to a PLMN with better channel quality.
  • the terminal device AS may fall back to the traditional (legacy) network selection method, for example, PLMN selection is made according to the second PLMN priority.
  • PLMN selection is made according to the second PLMN priority.
  • the NAS of the terminal device after instructing the NAS of the terminal device, fall back to the legacy network selection mode, or instruct the NAS of the terminal device to perform subsequent PLMN selection according to the instruction of the AS of the terminal device.
  • Step 3 The NAS of the terminal device performs PLMN selection according to the PLMN priority ordering and the first channel quality threshold.
  • Manner 1 The NAS of the terminal device first selects the PLMN according to the priority of the PLMN, and then selects the PLMN according to the channel quality of the PLMN and the first channel quality threshold.
  • first sort the searched PLMNs according to their priorities from high to low, and select at least one PLMN with a priority within a certain range. If the number of the at least one PLMN is one, the one PLMN can be determined as the target PLMN. If the at least one PLMN is multiple PLMNs, the multiple PLMNs may be sorted in descending order of channel quality, and a PLMN whose channel quality is higher than the first channel quality threshold (ie, a PLMN with a high-quality indication) is selected as the Target PLMN.
  • the first channel quality threshold ie, a PLMN with a high-quality indication
  • Manner 2 The NAS of the terminal device first selects the PLMN according to the channel quality of the PLMN and the first channel quality threshold, and then selects the PLMN according to the priority of the PLMN.
  • Step 4 The AS of the terminal device acquires the target PLMN selected by the NAS of the terminal device, and further performs cell selection or camping.
  • the terminal equipment selects PLMN based on the PLMN priority ordering and the channel quality information of the PLMN, which is equivalent to considering the equipment deployment situation, location, channel quality and other information of the terminal equipment, which is beneficial to the terminal equipment. Select a suitable PLMN to ensure continuous transmission of services.
  • the method for network selection according to an embodiment of the present application is described in detail above with reference to FIG. 2 from the perspective of a terminal device, and the method for network selection according to another embodiment of the present application is described in detail below with reference to FIG. 3 from the perspective of a network device. It should be understood that the description on the side of the network device corresponds to the description on the side of the terminal device, and similar descriptions can be referred to above, which are not repeated here to avoid repetition.
  • FIG. 3 is a schematic flowchart of a method 300 for network selection according to another embodiment of the present application.
  • the method 300 may be executed by a network device in the communication system shown in FIG. 1 .
  • the method 300 includes The following:
  • the network device sends indication information to the terminal device, where the indication information is used to instruct the terminal device to select a manner of the public land mobile network PLMN.
  • the network device may send the indication information to the terminal device according to information such as the device type of the terminal, the device deployment of the UE, the location of the UE, or the channel quality of the network.
  • the indication information is used to instruct the terminal device to select a PLMN based on a first PLMN priority order, where the first PLMN priority order is different from a predefined second PLMN priority order.
  • the network device may indicate the first PLMN prioritization to the terminal device according to information such as the device type of the terminal, the device deployment of the UE, the location of the UE or the channel quality of the network.
  • the first PLMN priority order corresponds to a specific terminal or a specific service.
  • the indication information is used to instruct the terminal device to perform PLMN selection according to the PLMN priority and the channel quality information of the PLMN;
  • the indication information is used to instruct the terminal device to select the PLMN according to the PLMN priority and the first channel quality threshold;
  • the indication information is used to instruct the terminal device to select the PLMN according to the PLMN priority, the first channel quality threshold and the channel quality information of the PLMN.
  • the indication information corresponds to a specific terminal or a specific service.
  • the indication information is sent through a system message or dedicated signaling.
  • the indication information in the method 300 may correspond to the first indication information and the second indication information in the method 200.
  • FIG. 4 shows a schematic block diagram of a terminal device 400 according to an embodiment of the present application.
  • the terminal device 400 includes:
  • the processing unit 410 is configured to perform PLMN selection according to the priority ordering of the public land mobile network PLMN and/or the channel quality information of the PLMN.
  • the processing unit 410 is specifically configured to:
  • the terminal device performs PLMN selection according to a first PLMN priority order, wherein the first PLMN priority order is different from a predefined second PLMN priority order.
  • the first PLMN priority order corresponds to a specific terminal, or the first PLMN priority order corresponds to a specific service, or the first PLMN priority order corresponds to a specific service of the terminal device.
  • the first PLMN prioritization is indicated by the network device or predefined.
  • processing unit 410 is further configured to:
  • PLMN selection is performed according to the first PLMN priority ordering, wherein the first indication information is used to instruct the terminal device based on the first PLMN priority Sorting makes PLMN selection.
  • the first indication information corresponds to a specific terminal or a specific service.
  • the first indication information is sent through system information or dedicated signaling.
  • processing unit 410 is further configured to:
  • PLMN selection is performed according to the first information and the first PLMN priority, where the first information includes the PLMN search result reported by the access stratum AS of the terminal device to the non-access stratum NAS of the terminal device and/or channel quality information of the PLMN.
  • processing unit 410 is further configured to:
  • the PLMN with the highest priority in the search result of the PLMN, or the PLMN with the priority higher than the first priority threshold is determined as the target PLMN.
  • the first priority threshold is predefined or indicated by a network device.
  • the first priority threshold is indicated by system information or dedicated signaling.
  • processing unit 410 is further configured to:
  • PLMN selection is performed in combination with PLMN priority ordering and PLMN channel quality information, wherein the first information includes the PLMN search result and/or the PLMN search result reported by the AS of the terminal device to the NAS of the terminal device Channel quality information of the PLMN.
  • processing unit 410 is further configured to:
  • the PLMN selection is performed according to the first information in combination with the PLMN priority ordering and the channel quality information of the PLMN, wherein the second indication information is used to indicate the terminal
  • the device performs PLMN selection according to the PLMN priority and the channel quality information of the PLMN.
  • the second indication information corresponds to a specific terminal, or the second indication information corresponds to a specific service, or the second indication information corresponds to a specific service of the terminal device.
  • the second indication information is sent through system information or dedicated signaling.
  • processing unit 410 is further configured to:
  • the target PLMN is determined according to the channel quality information of the PLMNs in the first PLMN set.
  • the first set of PLMNs includes at least one of the following PLMNs:
  • the priority of the PLMN is higher than the second priority threshold in the PLMN priority ordering.
  • the second priority threshold is indicated by the network device, or is predefined.
  • the second priority threshold is indicated by system information or dedicated signaling.
  • the target PLMN includes at least one of the following:
  • the channel quality in the first PLMN set is indicated as a high-quality PLMN
  • the channel quality information of the PLMN is a PLMN whose channel quality satisfies the high-quality condition.
  • the first channel quality threshold is indicated by the network device, or is predefined.
  • the first channel quality threshold is indicated by system information or dedicated signaling.
  • processing unit 410 is further configured to:
  • a target PLMN is determined in the second PLMN set according to the PLMN priority ordering.
  • the second set of PLMNs includes at least one of the following PLMNs:
  • the channel quality in the PLMN reported by the AS of the terminal device is indicated as a high-quality PLMN;
  • the channel quality information of the PLMN is a PLMN whose channel quality satisfies the high-quality condition.
  • the second channel quality threshold is indicated by the network device, or is predefined.
  • the second channel quality threshold is indicated by system information or dedicated signaling.
  • the target PLMN includes at least one of the following:
  • PLMNs in the second set of PLMNs that have a priority higher than a third priority threshold in the PLMN prioritization.
  • the third priority threshold is indicated by the network device, or is predefined.
  • the third priority threshold is indicated by system information or dedicated signaling.
  • the first information includes at least one of the following:
  • a PLMN whose channel quality satisfies the first condition
  • the target PLMN whose channel quality satisfies the first condition includes at least one of the following:
  • the PLMN whose channel quality meets the high-quality condition includes at least one of the following:
  • the PLMN whose channel quality does not meet the high-quality condition includes at least one of the following:
  • a PLMN whose channel quality is greater than -110dbm and less than or equal to the third channel quality threshold.
  • the first information further includes the third channel quality threshold.
  • processing unit 410 is further configured to:
  • the AS In the case of receiving the third indication information sent by the NAS of the terminal device, the AS sends the channel quality information of the specific PLMN and/or the third channel quality threshold to the NAS, where the third indication information is used for Instruct to report the channel quality information and/or the third channel quality threshold of the specific PLMN.
  • the specific PLMN includes at least one of the following:
  • the above-mentioned communication unit may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system-on-chip.
  • the aforementioned processing unit may be one or more processors.
  • terminal device 400 may correspond to the terminal device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of the various units in the terminal device 400 are respectively for realizing the method shown in FIG. 2 .
  • the corresponding process of the terminal device in 200 is not repeated here for brevity.
  • FIG. 5 is a schematic block diagram of a network device according to an embodiment of the present application.
  • the network device 500 of FIG. 5 includes:
  • the communication unit 510 is configured to send indication information to the terminal device, where the indication information is used to instruct the terminal device to select a manner of a public land mobile network PLMN.
  • the indication information is used to instruct the terminal device to perform PLMN selection based on a first PLMN priority order, where the first PLMN priority order is different from a predefined second PLMN priority order.
  • the first PLMN priority order corresponds to a specific terminal or a specific service.
  • the indication information is used to instruct the terminal device to perform PLMN selection according to the PLMN priority and the channel quality information of the PLMN; or
  • the indication information is used to instruct the terminal device to select the PLMN according to the PLMN priority and the first channel quality threshold;
  • the indication information is used to instruct the terminal device to select the PLMN according to the PLMN priority, the first channel quality threshold and the channel quality information of the PLMN.
  • the indication information corresponds to a specific terminal or a specific service.
  • the indication information is sent through system messages or dedicated signaling.
  • the above-mentioned communication unit may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system-on-chip.
  • the aforementioned processing unit may be one or more processors.
  • the network device 500 may correspond to the network device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the network device 500 are for realizing the method shown in FIG. 3 respectively.
  • the corresponding process of the network device in 300 is not repeated here for brevity.
  • FIG. 6 is a schematic structural diagram of a communication device 600 provided by an embodiment of the present application.
  • the communication device 600 shown in FIG. 6 includes a processor 610, and the processor 610 can call and run a computer program from a memory, so as to implement the method in the embodiment of the present application.
  • the communication device 600 may further include a memory 620 .
  • the processor 610 may call and run a computer program from the memory 620 to implement the methods in the embodiments of the present application.
  • the memory 620 may be a separate device independent of the processor 610 , or may be integrated in the processor 610 .
  • the communication device 600 may further include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices, specifically, may send information or data to other devices, or receive other devices Information or data sent by a device.
  • the transceiver 630 may include a transmitter and a receiver.
  • the transceiver 630 may further include antennas, and the number of the antennas may be one or more.
  • the communication device 600 may specifically be the network device in this embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the network device in each method in the embodiment of the present application. For the sake of brevity, details are not repeated here. .
  • the communication device 600 may specifically be the mobile terminal/terminal device of the embodiments of the present application, and the communication device 600 may implement the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application, for the sake of brevity. , and will not be repeated here.
  • FIG. 7 is a schematic structural diagram of a chip according to an embodiment of the present application.
  • the chip 700 shown in FIG. 7 includes a processor 710, and the processor 710 can call and run a computer program from a memory, so as to implement the method in this embodiment of the present application.
  • the chip 700 may further include a memory 720 .
  • the processor 710 may call and run a computer program from the memory 720 to implement the methods in the embodiments of the present application.
  • the memory 720 may be a separate device independent of the processor 710 , or may be integrated in the processor 710 .
  • the chip 700 may further include an input interface 730 .
  • the processor 710 may control the input interface 730 to communicate with other devices or chips, and specifically, may acquire information or data sent by other devices or chips.
  • the chip 700 may further include an output interface 740 .
  • the processor 710 can control the output interface 740 to communicate with other devices or chips, and specifically, can output information or data to other devices or chips.
  • the chip can be applied to the network device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the network device in each method of the embodiment of the present application, which is not repeated here for brevity.
  • the chip can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application.
  • the chip can implement the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application.
  • the chip can implement the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application.
  • the chip mentioned in the embodiments of the present application may also be referred to as a system-on-chip, a system-on-chip, a system-on-chip, or a system-on-a-chip, or the like.
  • FIG. 8 is a schematic block diagram of a communication system 900 provided by an embodiment of the present application. As shown in FIG. 8 , the communication system 900 includes a terminal device 910 and a network device 920 .
  • the terminal device 910 can be used to implement the corresponding functions implemented by the terminal device in the above method
  • the network device 920 can be used to implement the corresponding functions implemented by the network device in the above method. For brevity, details are not repeated here. .
  • the processor in this embodiment of the present application may be an integrated circuit chip, which has a signal processing capability.
  • each step of the above method embodiments may be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software.
  • the above-mentioned processor can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other available Programming logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software module may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.
  • the memory in this embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically programmable read-only memory (Erasable PROM, EPROM). Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
  • Volatile memory may be Random Access Memory (RAM), which acts as an external cache.
  • RAM Static RAM
  • DRAM Dynamic RAM
  • SDRAM Synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDR SDRAM
  • enhanced SDRAM ESDRAM
  • synchronous link dynamic random access memory Synchlink DRAM, SLDRAM
  • Direct Rambus RAM Direct Rambus RAM
  • the memory in the embodiment of the present application may also be a static random access memory (static RAM, SRAM), a dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.
  • Embodiments of the present application further provide a computer-readable storage medium for storing a computer program.
  • the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application.
  • the computer program enables the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application.
  • the computer-readable storage medium can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application. , and are not repeated here for brevity.
  • Embodiments of the present application also provide a computer program product, including computer program instructions.
  • the computer program product can be applied to the network device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the network device in each method of the embodiments of the present application. Repeat.
  • the computer program product can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application, For brevity, details are not repeated here.
  • the embodiments of the present application also provide a computer program.
  • the computer program can be applied to the network device in the embodiments of the present application.
  • the computer program When the computer program is run on the computer, it causes the computer to execute the corresponding processes implemented by the network device in each method of the embodiments of the present application. For the sake of brevity. , and will not be repeated here.
  • the computer program may be applied to the mobile terminal/terminal device in the embodiments of the present application, and when the computer program is run on the computer, the mobile terminal/terminal device implements the various methods of the computer program in the embodiments of the present application.
  • the corresponding process for the sake of brevity, will not be repeated here.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .

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Abstract

一种网络选择的方法、终端设备和网络设备，有利于选择到合适的PLMN，从而保证终端设备的业务的稳定传输。该方法包括：终端设备根据公共陆地移动网络PLMN的优先级排序和/或PLMN的信道质量信息进行PLMN选择。

Description

网络选择的方法、终端设备和网络设备 技术领域
本申请实施例涉及通信领域，具体涉及一种网络选择的方法、终端设备和网络设备。
背景技术
在新无线(New Radio，NR)系统中，终端的非接入层(Non-Access Stratum，NAS)基于公共陆地移动网络(Public Land Mobile Network，PLMN)的优先级排序进行网络选择(即PLMN选择)。PLMN的优先级排序为注册的PLMN(Registered PLMN，RPLMN)高于归属PLMN(Home PLMN，HPLMN)或第一等价归属PLMN(the first EHPLMN)。
但是，对于网络状态不稳定的终端(比如漫游的终端)，采用上述网络选择机制会使得终端驻留到RPLMN或定期返回到RPLMN，导致终端的数据传输不稳定问题，因此，如何实现高质量的网络选择是一项急需解决的问题。
发明内容
本申请提供了一种网络选择的方法、终端设备和网络设备，有利于选择到合适的PLMN，从而保证终端设备的业务的稳定传输。
第一方面，提供了一种网络选择的方法，包括：终端设备根据公共陆地移动网络PLMN的优先级排序和/或PLMN的信道质量信息进行PLMN选择。
第二方面，提供了一种网络选择的方法，包括：网络设备向终端设备发送指示信息，所述指示信息用于指示所述终端设备进行公共陆地移动网络PLMN选择的方式。
第三方面，提供了一种终端设备，用于执行上述第一方面或其各实现方式中的方法。
具体地，该终端设备包括用于执行上述第一方面或其各实现方式中的方法的功能模块。
第四方面，提供了一种网络设备，用于执行上述第二方面或其各实现方式中的方法。
具体地，该网络设备包括用于执行上述第二方面或其各实现方式中的方法的功能模块。
第五方面，提供了一种终端设备，包括处理器和存储器。该存储器用于存储计算机程序，该处理器用于调用并运行该存储器中存储的计算机程序，执行上述第一方面或其各实现方式中的方法。
第六方面，提供了一种网络设备，包括处理器和存储器。该存储器用于存储计算机程序，该处理器用于调用并运行该存储器中存储的计算机程序，执行上述第二方面或其各实现方式中的方法。
第七方面，提供了一种芯片，用于实现上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
具体地，该芯片包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有该装置的设备执行如上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
第八方面，提供了一种计算机可读存储介质，用于存储计算机程序，该计算机程序使得计算机执行上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
第九方面，提供了一种计算机程序产品，包括计算机程序指令，所述计算机程序指令使得计算机执行上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
第十方面，提供了一种计算机程序，当其在计算机上运行时，使得计算机执行上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
通过上述技术方案，终端设备根据公共陆地移动网络PLMN的优先级排序和/或PLMN的信道质量信息进行PLMN选择，有利于选择到合适的PLMN，从而能够保证终端设备的后续业务的稳定传输。
附图说明
图1是本申请实施例提供的一种通信系统架构的示意性图。
图2是根据本申请实施例提供的一种网络选择的方法的示意性流程图。
图3是根据本申请实施例提供的另一种网络选择的方法的示意性流程图。
图4是根据本申请实施例提供的一种终端设备的示意性框图。
图5是根据本申请实施例提供的一种网络设备的示意性框图。
图6是根据本申请实施例提供的一种通信设备的示意性框图。
图7是根据本申请实施例提供的一种芯片的示意性框图。
图8是根据本申请实施例提供的一种通信系统的示意性框图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。针对本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本申请实施例的技术方案可以应用于各种通信系统，例如：全球移动通讯(Global System of Mobile communication，GSM)系统、码分多址(Code Division Multiple Access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统、通用分组无线业务(General Packet Radio Service，GPRS)、长期演进(Long Term Evolution，LTE)系统、先进的长期演进(Advanced long term evolution，LTE-A)系统、新无线(New Radio，NR)系统、NR系统的演进系统、非授权频谱上的LTE(LTE-based access to unlicensed spectrum，LTE-U)系统、非授权频谱上的NR(NR-based access to unlicensed spectrum，NR-U)系统、非地面通信网络(Non-Terrestrial Networks，NTN)系统、通用移动通信系统(Universal Mobile Telecommunication System，UMTS)、无线局域网(Wireless Local Area Networks，WLAN)、无线保真(Wireless Fidelity，WiFi)、第五代通信(5th-Generation，5G)系统或其他通信系统等。
通常来说，传统的通信系统支持的连接数有限，也易于实现，然而，随着通信技术的发展，移动通信系统将不仅支持传统的通信，还将支持例如，设备到设备(Device to Device，D2D)通信，机器到机器(Machine to Machine，M2M)通信，机器类型通信(Machine Type Communication，MTC)，车辆间(Vehicle to Vehicle，V2V)通信，或车联网(Vehicle to everything，V2X)通信等，本申请实施例也可以应用于这些通信系统。
可选地，本申请实施例中的通信系统可以应用于载波聚合(Carrier Aggregation，CA)场景，也可以应用于双连接(Dual Connectivity，DC)场景，还可以应用于独立(Standalone，SA)布网场景。
可选地，本申请实施例中的通信系统可以应用于非授权频谱，其中，非授权频谱也可以认为是共享频谱；或者，本申请实施例中的通信系统也可以应用于授权频谱，其中，授权频谱也可以认为是非共享频谱。
本申请实施例结合网络设备和终端设备描述了各个实施例，其中，终端设备也可以称为用户设备(User Equipment，UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置等。
终端设备可以是WLAN中的站点(STATION，ST)，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、个人数字助理(Personal Digital Assistant，PDA)设备、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、下一代通信系统例如NR网络中的终端设备，或者未来演进的公共陆地移动网络(Public Land Mobile Network，PLMN)网络中的终端设备等。
在本申请实施例中，终端设备可以部署在陆地上，包括室内或室外、手持、穿戴或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、气球和卫星上等)。
在本申请实施例中，终端设备可以是手机(Mobile Phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(Virtual Reality，VR)终端设备、增强现实(Augmented Reality，AR)终端设备、工业控制(industrial control)中的无线终端设备、无人驾驶(self driving)中的无线终端设备、远程医疗(remote medical)中的无线终端设备、智能电网(smart grid)中的无线终端设备、运输安全(transportation safety)中的无线终端设备、智慧城市(smart city)中的无线终端设备或智慧家庭(smart home)中的无线终端设备等。
作为示例而非限定，在本申请实施例中，该终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能首饰等。
在本申请实施例中，网络设备可以是用于与移动设备通信的设备，网络设备可以是WLAN中的接入点(Access Point，AP)，GSM或CDMA中的基站(Base Transceiver Station，BTS)，也可以是WCDMA中的基站(NodeB，NB)，还可以是LTE中的演进型基站(Evolutional Node B，eNB或eNodeB)，或者中继站或接入点，或者车载设备、可穿戴设备以及NR网络中的网络设备(gNB)或者未来演进的PLMN网络中的网络设备或者NTN网络中的网络设备等。
作为示例而非限定，在本申请实施例中，网络设备可以具有移动特性，例如网络设备可以为移动的设备。可选地，网络设备可以为卫星、气球站。例如，卫星可以为低地球轨道(low earth orbit，LEO)卫星、中地球轨道(medium earth orbit，MEO)卫星、地球同步轨道(geostationary earth orbit，GEO)卫星、高椭圆轨道(High Elliptical Orbit，HEO)卫星等。可选地，网络设备还可以为设置在陆地、水域等位置的基站。
在本申请实施例中，网络设备可以为小区提供服务，终端设备通过该小区使用的传输资源(例如，频域资源，或者说，频谱资源)与网络设备进行通信，该小区可以是网络设备(例如基站)对应的小区，小区可以属于宏基站，也可以属于小小区(Small cell)对应的基站，这里的小小区可以包括：城市小区(Metro cell)、微小区(Micro cell)、微微小区(Pico cell)、毫微微小区(Femto cell)等，这些小小区具有覆盖范围小、发射功率低的特点，适用于提供高速率的数据传输服务。
示例性的，本申请实施例应用的通信系统100如图1所示。该通信系统100可以包括网络设备110，网络设备110可以是与终端设备120(或称为通信终端、终端)通信的设备。网络设备110可以为特定的地理区域提供通信覆盖，并且可以与位于该覆盖区域内的终端设备进行通信。
图1示例性地示出了一个网络设备和两个终端设备，可选地，该通信系统100可以包括多个网络设备并且每个网络设备的覆盖范围内可以包括其它数量的终端设备，本申请实施例对此不做限定。
可选地，该通信系统100还可以包括网络控制器、移动管理实体等其他网络实体，本申请实施例对此不作限定。
应理解，本申请实施例中网络/系统中具有通信功能的设备可称为通信设备。以图1示出的通信系统100为例，通信设备可包括具有通信功能的网络设备110和终端设备120，网络设备110和终端设备120可以为上文所述的具体设备，此处不再赘述；通信设备还可包括通信系统100中的其他设备，例如网络控制器、移动管理实体等其他网络实体，本申请实施例中对此不做限定。
应理解，本文中术语“系统”和“网络”在本文中常被可互换使用。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“/”，一般表示前后关联对象是一种“或”的关系。
应理解，在本申请的实施例中提到的“指示”可以是直接指示，也可以是间接指示，还可以是表示具有关联关系。举例说明，A指示B，可以表示A直接指示B，例如B可以通过A获取；也可以表示A间接指示B，例如A指示C，B可以通过C获取；还可以表示A和B之间具有关联关系。
在本申请实施例的描述中，术语“对应”可表示两者之间具有直接对应或间接对应的关系，也可以表示两者之间具有关联关系，也可以是指示与被指示、配置与被配置等关系。
本申请实施例中，"预定义"可以通过在设备(例如，包括终端设备和网络设备)中预先保存相应的代码、表格或其他可用于指示相关信息的方式来实现，本申请对于其具体的实现方式不做限定。比如预定义可以是指协议中定义的。
本申请实施例中，所述"协议"可以指通信领域的标准协议，例如可以包括LTE协议、NR协议以及应用于未来的通信系统中的相关协议，本申请对此不做限定。
为便于理解本申请实施例的技术方案，以下通过具体实施例详述本申请的技术方案。以下相关技术作为可选方案与本申请实施例的技术方案可以进行任意结合，其均属于本申请实施例的保护范围。本申请实施例包括以下内容中的至少部分内容。
为了满足垂直行业对延迟、移动性、可靠性、位置精度等方面的需求，5G系统需要对如何在接入网支持垂直业务进行增强。一种可能的场景就是支持物联网(Internet of Things，IOT)业务的传输。IoT业务的传输特性通常有以下几点：
1、IoT业务是静止的。
2、IoT业务可以位于覆盖范围有限的偏远位置。
3、IoT业务需要稳定的数据连接，作为测量和控制网络的一部分。
4、IoT设备可能是永久漫游的，比如IoT设备的模块安装在国外，或者，有意使得在任何情况下都能使得为用户提供最佳覆盖。
在UE进入系统覆盖区域时，UE执行小区搜索过程。无论UE处于哪种状态(例如连接态(connected)，空闲态(idle)，非激活态(inactive))，UE在系统中移动时都将进行小区搜索，以实现移动性。
在相关技术中，UE的非接入层(Non-Access Stratum，NAS)基于PLMN的优先级排序进行网络选择(即PLMN选择)，一般来说，PLMN的优先级排序为注册的PLMN(Registered PLMN，RPLMN)高于归属PLMN(Home PLMN，HPLMN)或第一等价归属PLMN(the first EHPLMN)。
在一些场景中，对于网络状态不稳定的UE(比如漫游的UE)，上述网络选择方式存在一些问题。这是由于当前的网络选择机制/漫游转向机制使得即使存在其他条件更好(如信道质量条件更优)的网络可用，UE也需要根据PLMN优先级进行网络选择，使得UE优先选择停留在RPLMN网络或需要定期返回到RPLMN网络，导致UE的连接质量差，最终导致UE传输不稳定等问题，因此，如何实现高质量的网络选择是一项急需解决的问题。
图2是根据本申请实施例的网络选择的方法200的示意性流程图，该方法200可以由图1中的终端设备执行。如图2所示，该方法200至少包括如下部分内容：
S210，终端设备根据公共陆地移动网络PLMN的优先级排序和/或PLMN的信道质量信息进行PLMN选择。
在本申请一些实施例中，对于特定终端，根据PLMN的优先级排序和/或PLMN的信道质量信息进行PLMN选择。
在本申请另一些实施例中，对于终端设备的特定业务，终端设备根据PLMN的优先级排序和/或PLMN的信道质量信息进行PLMN选择。这里的终端设备可以为任意终端。
在本申请又一些实施例中，对于特定终端的特定业务，终端设备根据PLMN的优先级排序和/或PLMN的信道质量信息进行PLMN选择。
在一些实施例中，所述特定终端，例如可以为特定类型的终端，比如支持IOT业务的终端，或者，特定模式的终端，例如，前文所述的永久漫游的终端。
在一些实施例中，所述特定业务可以包括但不限于以下中的至少一种：采用逻辑信道(Logical Channel，LCH)，逻辑信道组(LCH group)，服务质量流(Quality of Service flow，QoS flow)，数据无线承载(Data Radio Bearer，DRB)，协议数据单元(Protocol Data Unit，PDU)会话(session)等类似方式表征的业务。
作为示例，所述特定业务例如可以包括IOT业务。
在本申请一些实施例中，所述PLMN的优先级排序可以为第一PLMN优先级排序，该第一PLMN优先级排序与预定义的第二PLMN优先级排序不同。
例如，所述第二PLMN优先级排序可以为RPLMN高于HPLMN/the first EHPLMN。
例如，所述第二PLMN优先级排序可以为现有的PLMN优先级排序。
在一些实施例中，所述第一PLMN优先级排序对应特定终端，例如IOT终端。
换言之，对于特定终端，可以根据第一PLMN优先级排序进行PLMN选择。
在另一些实施例中，所述第一PLMN优先级排序对应特定业务。
换言之，对于任意终端的所述特定业务，所述终端设备可以根据第一PLMN优先级排序进行PLMN选择。
在又一些实施例中，所述第一PLMN优先级对应特定终端的特定业务，所述特定终端例如可以为IOT终端，所述特定业务例如可以为前述示例的业务。
例如，对于IOT终端的特定业务，终端设备可以根据第一PLMN优先级排序进行PLMN选择。
在本申请一些实施例中，所述第一PLMN优先级排序可以是网络设备指示的，或者也可以是预定义的。
例如，网络设备可以通过专用信令，例如无线资源控制(Radio Resource Control，RRC)信令或非接入层(Non-Access Stratum，NAS)信令指示所述第一PLMN优先级，或者，也可以通过系统信息块(System Information Block，SIB)指示所述第一PLMN优先级，本申请并不限于此。
在一些实施例中，网络设备可以根据UE的设备部署，或UE类型，或支持的业务类型，或UE位置或网络的信道质量等信息确定将所述第一PLMN优先级排序设置在哪些终端设备中，从而这些终端设备可以基于特定的PLMN优先级排序进行PLMN选择，有利于选择到合适的PLMN中，保证后续业务传输的稳定性。
例如，可以将第一PLMN优先级排序设置在IOT终端中，或者设置在支持IOT业务的终端中。
在另一些实施例中，网络设备可以根据UE的设备类型，UE的设备部署，UE位置或UE类型，或UE支持的业务类型，或网络的信道质量等信息，向终端设备指示所述第一PLMN优先级排序。
例如，可以向IOT终端或支持IOT业务的终端指示所述第一PLMN优先级排序。
在一些实施例中，所述网络设备可以只向特定终端指示所述第一PLMN优先级排序，则其他终端可以采用预定义的第二PLMN优先级排序进行PLMN选择。
在本申请一些实施例中，在所述终端设备为特定终端的情况下，所述终端设备根据所述第一PLMN优先级排序进行PLMN选择。
在本申请另一些实施例中，在所述终端设备的待传输业务为特定业务的情况下，所述终端设备根 据所述第一PLMN优先级排序进行PLMN选择。
在本申请又一些实施例中，在所述终端设备为特定终端，并且所述终端设备的待传输业务为特定业务的情况下，所述终端设备根据所述第一PLMN优先级排序进行PLMN选择。
也就是说，终端设备可以不基于网络设备的指示，根据第一PLMN优先级排序进行PLMN选择。
在本申请又一些实施例中，终端设备可以基于网络设备的指示，根据所述第一PLMN优先级排序进行PLMN选择。
例如，终端设备可以接收网络设备发送的第一指示信息，若所述第一指示信息指示基于第一PLMN优先级排序进行PLMN选择，则终端设备根据所述第一PLMN优先级排序进行PLMN选择。
在一些实施例中，所述第一指示信息对应特定终端，或者，所述第一指示信息对应特定业务，或者，所述第一指示信息对应特定终端的特定业务。其中，特定终端和特定业务的具体实现参考前文的相关说明，为了简洁，这里不再赘述。
即网络设备可以指示对于特定终端和/或特定业务，基于第一PLMN优先级排序进行PLMN选择。
在一些实施例中，所述第一指示信息通过系统信息或专用信令发送。例如，该专用信令可以为NAS信令或RRC信令等，本申请并不限于此。
在一些实施例中，网络设备可以指示特定终端和/或特定业务是否基于第一PLMN优先级排序进行PLMN选择。可选地，还可以进一步指示第一PLMN优先级排序，或者所述第一PLMN优先级排序是预定义的。
例如，所述网络设备可以指示特定终端和/或特定业务基于第一PLMN优先级排序进行PLMN选择，其他终端和/或业务基于第二PLMN优先级排序进行PLMN选择。
在本申请一些实施例中，终端设备的接入层(Access Stratum，AS)可以对PLMN进行搜索和/或测量，得到PLMN的搜索结果和/或PLMN的信道质量信息。
在一些实施例中，所述PLMN的信道质量信息可以包括但不限于如下中的至少一种：
参考信号接收功率(Reference Signal Receiving Power，RSRP)、参考信号接收质量(Reference Signal Receiving Quality，RSRQ)、信号干扰噪声比(Signal to Interference plus Noise Ratio，SINR)、信道质量指示(Channel Quantity Indicator，CQI)、信号噪声比(Signal to Noise Ratio，SNR)。
进一步地，终端设备的AS可以向终端设备的NAS上报第一信息，所述第一信息可以包括PLMN的搜索结果和/或PLMN的信道质量信息中的部分或全部。
可选地，所述PLMN的搜索结果可以为PLMN标识。
在一些实施例中，所述第一信息可以包括信道质量满足第一条件的PLMN和/或PLMN的信道质量信息。
可选地，所述信道质量满足第一条件可以包括以下中的至少一种：
信道质量满足高质量条件，信道质量不满足高质量条件，信道质量被指示为高质量。
作为示例，所述第一信息可以包括如下中的至少一项：
a、信道质量满足高质量条件的PLMN；
b、信道质量不满足高质量条件的PLMN；
c、PLMN的信道质量信息；
d、高质量条件对应的阈值。
可选地，对于信息a中的PLMN，可以配置一个高质量指示，表示该PLMN具有高质量，此情况下，可以不上报此类PLMN的信道质量信息。即信息c中可以不包括信息a中的PLMN的信道质量信息。
在一些实施例中，信道质量满足高质量条件的PLMN可以包括如下中的至少一种：
信道质量大于-110dbm的PLMN；
信道质量大于第三信道质量阈值的PLMN。
在一些实施例中，所述第三信道质量阈值可以大于-110dbm。
在一些实施例中，信道质量不满足高质量条件的PLMN可以包括如下中的至少一种：
信道质量小于-110dbm的PLMN；
信道质量小于第三信道质量阈值的PLMN；
信道质量大于-110dbm，并且小于或等于第三信道质量阈值的PLMN。
在一些实施例中，所述第三信道质量阈值对应特定终端，或者特定业务。
也就是说，对于特定终端，或者支持特定业务的终端，或者终端的特定业务可以根据该第三信道质量阈值进行第一信息的上报。
在一些实施例中，信息c中可以包括信息b中的PLMN的信道质量信息，或者也可以包括终端设 备搜索到的所有PLMN的信道质量信息，或者，也可以只包括信息a中的PLMN的信道质量信息。
在一些实施例中，信息d可以包括所述第三信道质量阈值，或者-110dbm。
在本申请一些实施例中，信道质量被指示为高质量可以理解为信道质量高于或等于第三信道质量阈值，或者高于或等于-110dbm。
可选地，在一些实施例中，所述终端设备的AS可以基于终端设备的NAS层的指示例如，在接收所述终端设备的NAS发送的第四指示信息的情况下，向所述终端设备的NAS发送第一信息。
可选地，在一些实施例中，所述终端设备的AS可以基于终端设备的NAS层的指示例如，在接收所述终端设备的NAS发送的第三指示信息的情况下，向所述终端设备的NAS发送特定PLMN的信道质量信息和/或所述第三信道质量阈值，其中，所述第三指示信息用于指示上报所述特定PLMN的信道质量信息和/或所述第三信道质量阈值。
即终端设备的NAS可以向终端设备的AS指示需要上报哪些PLMN的信道质量信息。
在一些实施例中，所述特定PLMN包括以下情况的至少一种：
所述终端设备搜索到的所有PLMN；
所述所有PLMN中信道质量高于所述第三信道质量阈值的PLMN；
所有PLMN中信道质量高于-110dbm的PLMN。
在一些实施例中，所述第一信息可以只包括前述的信息a，即终端设备可以只上报具有高质量指示的PLMN，相对于考虑了终端设备的信道质量，位置，部署等情况，进一步地，终端设备的NAS在根据第一信息进行PLMN选择时，有利于选择到合适的PLMN。
在本申请一些实施例中，所述终端设备的NAS可以根据所述终端设备的AS上报的第一信息和所述第一PLMN优先级排序进行PLMN选择。
例如，可以将终端设备的AS上报的PLMN中优先级最高的PLMN确定为目标PLMN。
又例如，将终端设备的AS上报的PLMN中优先级高于第一优先级阈值的PLMN确定为目标PLMN。
可选地，若上报的PLMN中优先级最高的PLMN或者优先级高于第一优先级阈值的PLMN有多个，进一步地，该终端设备可以结合该多个PLMN的信道质量进行选择，例如，选择该多个PLMN中信道质量最优的PLMN，或者信道质量高于特定信道阈值的PLMN作为目标PLMN。
在一些实施例中，所述第一优先级阈值是预定义的，或者是由网络设备指示的。
在一些实施例中，所述第一优先级阈值是通过系统信息或专用信令指示的，例如，通过NAS信令或RRC信令指示。
综上，对于特定终端，或者特定业务，终端设备基于特定的PLMN优先级排序(即第一PLMN优先级排序)进行PLMN选择，相当于考虑了终端设备的设备部署情况，位置等信息，有利于终端设备选择到合适的PLMN，进而保证后续业务的稳定传输。
在本申请又一些实施例中，终端设备根据PLMN的优先级排序和PLMN的信道质量信息进行PLMN选择。
可选地，所述PLMN的优先级排序可以为前述的第一PLMN优先级排序，或者也可以为第二PLMN优先级排序，本申请对此不作限定。
在本申请一些实施例中，终端设备基于网络设备的指示，根据所述PLMN的优先级排序和PLMN的信道质量信息进行PLMN选择。
例如，终端设备可以接收网络设备发送的第二指示信息，所述第二指示信息指示根据PLMN的优先级排序和PLMN的信道质量信息进行PLMN选择，则所述终端设备根据所述PLMN的优先级排序和PLMN的信道质量信息进行PLMN选择。
在一些实施例中，所述第二指示信息对应特定终端，或者，所述第二指示信息对应特定业务，或者，所述第二指示信息对应特定终端的特定业务。其中，特定终端和特定业务的具体实现参考前文的相关说明，为了简洁，这里不再赘述。
在一些实施例中，所述第二指示信息通过系统信息或专用信令发送。例如，该专用信令可以为NAS信令或RRC信令等，本申请并不限于此。
在一些实施例中，对于特定终端，可以根据PLMN的优先级排序和PLMN的信道质量信息进行PLMN选择。
也就是说，在所述终端设备为特定终端的情况下，所述终端设备根据PLMN的优先级排序和PLMN的信道质量信息进行PLMN选择。
在另一些实施例中，对于终端设备的特定业务，该终端设备可以根据PLMN的优先级排序和PLMN的信道质量信息进行PLMN选择。
也就是说，在所述终端设备的待传输业务为特定业务的情况下，所述终端设备根据PLMN的优先级排序和PLMN的信道质量信息进行PLMN选择。
在又一些实施例中，对于特定终端的特定业务，终端设备可以根据PLMN的优先级排序和PLMN的信道质量信息。
也就是说，在所述终端设备为特定终端，并且所述终端设备的待传输业务为特定业务的情况下，所述终端设备根据PLMN的优先级排序和PLMN的信道质量信息进行PLMN选择。例如，对应IOT终端的IOT业务，终端设备可以根据PLMN的优先级排序和PLMN的信道质量信息进行PLMN选择。
综上，可以预定义对于特定终端，或者特定业务，或者特定终端的特定业务根据PLMN的优先级排序和PLMN的信道质量信息进行PLMN选择，此情况下，可以不需要网络设备的指示，例如可以将PLMN选择的方式设置在终端设备中。
在一些实施例中，网络设备可以指示特定终端和/或特定业务是否基于PLMN优先级排序和PLMN的信道质量信息进行PLMN选择。
例如，所述网络设备可以指示特定终端和/或特定业务基于PLMN优先级排序和PLMN的信道质量信息进行PLMN选择，其中，该PLMN优先级排序可以为第一PLMN优先级排序或第二PLMN优先级排序，其他终端和/或业务基于第二PLMN优先级排序进行PLMN选择。
在一些实施例中，网络设备可以根据UE的设备部署，UE位置或网络的信道质量等信息确定将根据PLMN优先级排序和PLMN的信道质量进行PLMN选择的方式设置在哪些终端设备中，从而这些终端设备可以基于PLMN优先级排序和PLMN的信道质量进行PLMN选择，有利于选择到合适的PLMN中，保证后续业务传输的稳定性。
在另一些实施例中，网络设备可以根据终端的设备类型，UE的设备部署，UE位置或网络的信道质量等信息，向终端设备指示基于PLMN优先级排序和PLMN的信道质量进行PLMN选择。
在一些实施例中，所述网络设备可以只向特定终端指示基于PLMN优先级排序和PLMN的信道质量进行PLMN选择，则其他终端可以采用预定义的第二PLMN优先级排序进行PLMN选择。
在本申请一些实施例中，终端设备的AS可以对PLMN进行搜索和/或测量，得到PLMN的搜索结果和/或PLMN的信道质量信息。
在一些实施例中，所述PLMN的信道质量信息可以包括如下中的至少一种：
RSRP、RSRQ、SINR、CQI、SNR。
进一步地，终端设备的AS可以向终端设备的NAS上报第一信息，所述第一信息可以包括PLMN的搜索结果和/或PLMN的信道质量信息中的部分或全部。
在一些实施例中，所述第一信息可以包括信道质量满足第一条件的PLMN和/或PLMN的信道质量信息。
可选地，所述信道质量满足第一条件可以包括以下中的至少一种：
信道质量满足高质量条件，信道质量不满足高质量条件，信道质量被指示为高质量。
作为示例，所述第一信息可以包括如下中的至少一项：
a、信道质量满足高质量条件的PLMN；
b、信道质量不满足高质量条件的PLMN；
c、PLMN的信道质量信息；
d、高质量条件对应的阈值。
可选地，对于信息a中的PLMN，可以配置一个高质量指示，表示该PLMN具有高质量，此情况下，可以不上报此类PLMN的信道质量信息。即信息c中可以不包括信息a中的PLMN的信道质量信息。
在一些实施例中，信道质量满足高质量条件的PLMN可以包括如下中的至少一种：
信道质量大于-110dbm的PLMN；
信道质量大于第三信道质量阈值的PLMN。
在一些实施例中，所述第三信道质量阈值可以大于-110dbm。
在一些实施例中，信道质量不满足高质量条件的PLMN可以包括如下中的至少一种：
信道质量小于-110dbm的PLMN；
信道质量小于第三信道质量阈值的PLMN；
信道质量大于-110dbm，并且小于或等于第三信道质量阈值的PLMN。
在一些实施例中，所述第三信道质量阈值对应特定终端，或者特定业务。
也就是说，对于特定终端，或者终端的特定业务可以根据该第三信道质量阈值进行第一信息的上报。
在一些实施例中，信息c中可以包括信息b中的PLMN的信道质量信息，或者也可以包括终端设备搜索到的所有PLMN的信道质量信息，或者，也可以只包括信息a中的PLMN的信道质量信息。
在一些实施例中，信息d可以包括所述第三信道质量阈值或-110dbm。
可选地，在一些实施例中，所述终端设备的AS可以基于终端设备的NAS层的指示例如，在接收所述终端设备的NAS发送的第三指示信息的情况下，向所述终端设备的NAS发送特定PLMN的信道质量信息和/或所述第三信道质量阈值，其中，所述第三指示信息用于指示上报所述特定PLMN的信道质量信息和/或所述第三信道质量阈值。
即终端设备的NAS可以向终端设备的AS指示需要上报哪些PLMN的信道质量信息。
在一些实施例中，所述特定PLMN包括以下情况的至少一种：
所述终端设备搜索到的所有PLMN；
所述所有PLMN中信道质量高于所述第三信道质量阈值的PLMN；
所有PLMN中信道质量高于-110dbm的PLMN。
在一些实施例中，所述第一信息可以只包括前述的信息a，即终端设备可以只上报具有高质量指示的PLMN，相对于考虑了终端设备的信道质量，位置，部署等情况，进一步地，终端设备的NAS在根据第一信息进行PLMN选择时，有利于选择到合适的PLMN。
在本申请一些实施例中，所述终端设备根据所述第一信息，结合PLMN优先级排序和PLMN的信道质量信息进行PLMN选择。
方式1：
所述终端设备根据所述第一信息，结合PLMN优先级排序和PLMN的信道质量信息进行PLMN选择，包括：
根据所述PLMN的搜索结果和所述PLMN优先级排序，确定第一PLMN集合；
根据所述第一PLMN集合中的PLMN的信道质量信息，确定目标PLMN。
在基于PLMN优先级排序和PLMN的信道质量信息进行PLMN选择时，可以首先根据PLMN优先级排序，确定第一PLMN集合，进一步结合PLMN的信道质量信息，确定目标PLMN。
应理解，在本申请实施例中，结合PLMN的信道质量信息进行PLMN选择时，该PLMN的信道质量信息可以是PLMN的测量结果，例如RSRP，或者，也可以是根据PLMN的测量结果进行调整得到的信道质量信息，例如可以将PLMN的测量结果加上特定调整量，确定为PLMN的信道质量信息，该特定调整量可以根据PLMN的优先级排序确定。例如，若PLMN为高优先级，则对应的调整量可以为正的调整量，或者，若PLMN为低优先级，则对应的调整量为0或负的调整量。
在一些实施例中，所述第一PLMN集合包括以下PLMN中的至少一种：
所述PLMN的搜索结果中在所述PLMN优先级排序中优先级最高的PLMN；
所述PLMN的搜索结果中在所述PLMN优先级排序中优先级高于第二优先级阈值的PLMN。
也就是说，在根据PLMN优先级排序确定第一PLMN集合时，可以选择优先级最高的PLMN，或者，也可以选择优先级高于第二优先级阈值的PLMN构成所述第一PLMN集合。
在一些实施例中，所述第二优先级阈值是网络设备指示的，或者是预定义的。
在一些实施例中，所述第二优先级阈值通过系统信息或专用信令指示，例如通过NAS信令或RRC信令指示。
在一些实施例中，所述第二优先级阈值对应特定终端，或特定业务。
在一些实施例中，所述目标PLMN包括以下中的至少一种：
所述第一PLMN集合中信道质量最高的PLMN；
所述第一PLMN集合中信道质量高于第一信道质量阈值的PLMN；
所述第一PLMN集合中信道质量被指示为高质量的PLMN；
所述PLMN的信道质量信息中信道质量满足高质量条件的PLMN；
所述PLMN的信道质量信息中信道质量不满足高质量条件的PLMN。
在一种实现方式中，终端设备可以将PLMN的搜索结果中的PLMN按照优先级由高到低的顺序进行排序，选择优先级在一定范围(例如高于第二优先级阈值)内的PLMN，若满足条件的PLMN的数量为一个，可以将该一个PLMN作为目标PLMN，或者，若满足条件的PLMN的数量为多个，可以进一步根据该多个PLMN的信道质量进行PLMN选择，例如，将该多个PLMN的信道质量按照由高到低的顺序进行排序，在一种实现方式中，终端设备可以选择信道质量最高的PLMN。
举例说明，若第一PLMN集合中优先级最高的PLMN的信道质量为X1，对应的调整量为delt1，则该PLMN的目标信道质量为X1+delta1，优先级次高的PLMN的信道质量为X2，对应的调整量为delta2，则该PLMN的目标信道质量为X2+delta2，若X1+delta1大于X2+delta2，则可以选择优先级 最高的PLMN作为目标PLMN，否则，选择优先级次高的PLMN作为目标PLMN。
在一些实施例中，信道质量被指示为高质量可以包括信道质量高于-110dbm，或者信道质量高于第三信道质量阈值。
对于信道质量高于-110dbm，或者信道质量高于第三信道质量阈值的PLMN，可以配置一个高质量指示，则在进行PLMN选择时，可以优选具有高质量指示的PLMN。
在一些实施例中，信道质量满足高质量条件可以包括：信道质量大于-110dbm，或者信道质量高于第三信道质量阈值。
可选地，在一些实施例中，所述第一信道质量阈值是网络设备指示的，或者是预定义的。可选地，网络设备可以在向终端设备指示根据PLMN的优先级和PLMN的信道质量信息进行PLMN选择时，同时指示该第一信道质量阈值。即第一信道质量阈值和第二指示信息通过同一消息指示。
可选地，在一些实施例中，所述第一信道质量阈值通过系统信息或专用信令指示，例如通过NAS信令或RRC信令指示，本申请并不限于此。
方式2：
所述终端设备根据所述第一信息，结合PLMN优先级排序和PLMN的信道质量信息进行PLMN选择，包括：
根据所述终端设备的AS上报的PLMN的信道质量信息，确定第二PLMN集合；
根据所述PLMN优先级排序，在所述第二PLMN集合中确定目标PLMN。
在基于PLMN优先级排序和PLMN的信道质量信息进行PLMN选择时，可以首先根据PLMN的信道质量信息，确定第二PLMN集合，进一步结合PLMN的优先级排序，确定目标PLMN。
在一些实施例中，所述第二PLMN集合包括以下PLMN中的至少一种：
所述PLMN的信道质量信息中信道质量最高的PLMN；
所述PLMN的信道质量信息中高于第二信道质量阈值的PLMN；
所述终端设备的AS上报的PLMN中信道质量被指示为高质量的PLMN；
所述PLMN的信道质量信息中信道质量满足高质量条件的PLMN；
所述PLMN的信道质量信息中信道质量不满足高质量条件的PLMN。
其中，信道质量被指示为高质量，信道质量满足高质量条件的具体说明参考方式1中的相关说明，这里不再赘述。
在一种实现方式中，终端设备可以将PLMN的搜索结果中的PLMN按照信道质量由高到低进行排序，选择信道质量在一定范围(例如高于第二信道质量阈值)内的PLMN，若满足条件的PLMN的数量为一个，可以将该一个PLMN作为目标PLMN，或者，若满足条件的PLMN的数量为多个，可以进一步根据该多个PLMN的优先级进行PLMN选择，例如，将该多个PLMN的优先级按照由高到低的顺序进行排序，在一种实现方式中，终端设备可以选择优先级最高的PLMN。
在一些实施例中，所述第二信道质量阈值是网络设备指示的，或者是预定义的。
在一些实施例中，所述第二信道质量阈值通过系统信息或专用信令指示。
在一些实施例中，所述第二信道质量阈值对应特定终端，或特定业务。
在一些实施例中，所述目标PLMN包括以下中的至少一种：
所述第二PLMN集合中在所述PLMN优先级排序中优先级最高的PLMN；
所述第二PLMN集合中在所述PLMN优先级排序中优先级高于第三优先级阈值的PLMN。
在一些实施例中，所述第三优先级阈值是网络设备指示的，或者是预定义的。
在一些实施例中，所述第三优先级阈值通过系统信息或专用信令指示。
在一些实施例中，所述第三信道质量阈值对应特定终端，或特定业务。
可选地，在一些实施例中，所述第一信道质量阈值，所述第二信道质量阈值和所述第三信道质量阈值可以相同，或者不同。
可选地，在一些实施例中，所述第一优先级阈值，所述第二优先级阈值和所述第三优先级阈值可以相同，或者不同。
综上，对于特定终端，或者特定业务，终端设备基于PLMN优先级排序和PLMN的信道质量信息进行PLMN选择，相当于考虑了终端设备的设备部署情况，位置，信道质量等信息，有利于终端设备选择到合适的PLMN，进而保证业务的稳定传输。
以下，结合具体实施例，说明终端设备进行PLMN选择的具体实现流程。
实施例1
步骤1：终端设备的AS对PLMN进行搜索和/或测量，获取PLMN的搜索结果和/或PLMN的信道质量信息。
可选地，所述终端设备还可以获取小区的系统信息。
可选地，所述系统信息中可以包括第一指示信息，所述第一指示信息用于指示所述终端设备根据第一PLMN优先级排序进行PLMN选择。
可选对，所述第一指示信息对应特定终端，例如IOT终端，或者特定业务，例如IOT业务。
可选地，所述终端设备的AS可以通知所述终端设备的NAS根据第一PLMN优先级排序进行PLMN选择。
可选地，所述第一PLMN优先级排序也可以对应特定终端，或者，特定业务，此情况下，可以不必基于网络设备的指示根据第一PLMN优先级排序进行PLMN选择。
可选地，所述第一PLMN优先级排序可以是网络设备指示的，例如，网络设备通过系统信息或专用信令指示，或者预定义的，例如是协议约定的，或者在终端设备中设置的。
应理解，终端设备基于第一PLMN优先级排序进行PLMN选择，可以是基于网络设备的指示，或者也可以根据终端设备的类型，或者根据待传输的业务的类型决定的。
步骤2：终端设备的AS层向终端设备的NAS层上报第一信息。
可选地，所述第一信息可以包括以下中的至少一项：
a、信道质量高于-110dbm的PLMN，此类PLMN对应高质量指示；
b、信道质量低于-110dbm的PLMN；
c、PLMN对应的信道质量信息。
可选地，信息c中的PLMN对应的信道质量信息可以为信道b中的PLMN对应的信道质量，对于具有高质量指示的PLMN，终端设备的NAS可以不必上报此类PLMN的信道质量。
步骤3：终端设备的NAS根据第一PLMN优先级排序进行PLMN选择。
例如，选择上报的PLMN中优先级最高的PLMN作为目标PLMN。
又例如，选择上报的PLMN中优先级最高且具有高质量指示的PLMN作为目标PLMN。
步骤4：终端设备的AS获取终端设备的NAS选择的目标PLMN，进一步进行小区的选择或驻留等。
综上，对于特定终端，或者特定业务，终端设备基于特定的PLMN优先级排序(即第一PLMN优先级排序)进行PLMN选择，相当于考虑了终端设备的设备部署、位置，信道质量等信息，有利于终端设备选择到合适的PLMN，进而保证业务的连续传输。
实施例2
步骤1：终端设备的AS对PLMN进行搜索和/或测量，获取PLMN的搜索结果和/或PLMN的信道质量信息。
可选地，所述终端设备还可以获取小区的系统信息。
可选地，所述系统信息中可以包括第二指示信息，所述第二指示信息用于指示所述终端设备根据PLMN优先级排序和PLMN的信道质量信息进行PLMN选择。
可选对，所述第二指示信息对应特定终端，例如IOT终端，或者特定业务，例如IOT业务。
可选地，上述PLMN选择方式对应特定终端，或者，特定业务，此情况下，可以不必基于网络设备的指示根据PLMN优先级排序和PLMN的信道质量信息进行PLMN选择。
也就是说，终端设备基于LMN优先级排序和PLMN的信道质量信息进行PLMN选择，可以是基于网络设备的指示，或者也可以根据终端设备的类型，或者根据待传输的业务的类型决定的。
可选地，所述终端设备的AS可以通知所述终端设备的NAS根据PLMN优先级排序和PLMN的信道质量信息进行PLMN选择。
步骤2：终端设备的AS向终端设备的NAS上报第一信息。
可选地，所述第一信息可以包括以下中的至少一项：
a、信道质量高于-110dbm的PLMN，此类PLMN对应高质量指示；
b、信道质量低于-110dbm的PLMN；
c、PLMN对应的信道质量信息。
可选地，信息c中的PLMN对应的信道质量信息可以包括信道b中的PLMN对应的信道质量，对于具有高质量指示的PLMN，NAS可以不必上报此类PLMN的信道质量。
可选地，信息c中的PLMN对应的信道质量信息可以包括终端设备搜索到的所有PLMN对应的信道质量。
可选地，所述终端设备的AS可以基于终端设备的NAS的指示上报所有PLMN对应的信道质量信息。
即，终端设备的NAS可以向终端设备的AS指示需要上报哪些PLMN的信道质量信息。
步骤3：终端设备的NAS根据PLMN优先级排序和PLMN的信道质量信息进行PLMN选择。
方式1：终端设备的NAS首先根据PLMN的优先级进行PLMN选择，然后根据PLMN的信道质量进行PLMN选择。
例如，将搜索到的PLMN按照优先级从高到低排序，选出优先级在一定范围的至少一个PLMN，如果该至少一个PLMN的数量为一个，可以将该一个PLMN确定为目标PLMN。如果该至少一个PLMN为多个PLMN，可以将该多个PLMN按照信道质量由高到低的顺序进行排序，选择信道质量最高的PLMN作为目标PLMN。
方式2：终端设备的NAS首先根据PLMN的信道质量进行PLMN选择，然后根据PLMN的优先级进行PLMN选择。
例如，将搜索到的PLMN按照信道质量从高到低排序，选出信道质量在一定范围的至少一个PLMN，如果该至少一个PLMN的数量为一个，可以将该一个PLMN确定为目标PLMN。如果该至少一个PLMN为多个PLMN，可以将该多个PLMN按照优先级由高到低的顺序进行排序，选择优先级最高的PLMN作为目标PLMN。
方式3：终端设备的NAS同时考虑PLMN的信道质量和PLMN的优先级进行PLMN选择。
例如，若搜索到的PLMN中优先级最高的PLMN的信道质量为X1，对应的调整量为delt1，则目标信道质量为X1+delta1，优先级次高的PLMN的信道质量为X2，对应的调整量为delta2，则目标信道质量为X2+delta2，若X1+delta1大于X2+delta2，则可以选择优先级最高的PLMN作为目标PLMN，否则选择优先级次高的PLMN作为目标PLMN。步骤4：终端设备的AS获取终端设备的NAS选择的目标PLMN，进一步进行小区的选择或驻留等。
综上，对于特定终端，或者特定业务，终端设备基于PLMN优先级排序和PLMN的信道质量信息进行PLMN选择，相当于考虑了终端设备的设备部署情况，位置、信道质量等信息，有利于终端设备选择到合适的PLMN，进而保证业务的连续传输。
实施例3
步骤1：终端设备的AS对PLMN进行搜索和/或测量，获取PLMN的搜索结果和/或PLMN的信道质量信息。
可选地，所述终端设备还可以获取小区的系统信息。
可选地，所述系统信息中可以包括第二指示信息，所述第二指示信息用于指示所述终端设备根据PLMN优先级排序和第一信道质量阈值进行PLMN选择，或者，所述第二指示信息用于指示所述终端设备根据PLMN优先级排序，PLMN的信道质量和第一信道质量阈值进行PLMN选择。
可选地，所述第二指示信息对应特定终端，例如IOT终端，或者特定业务，例如IOT业务。
可选地，上述PLMN选择方式对应特定终端，或者，特定业务，此情况下，可以不必基于网络设备的指示根据PLMN优先级排序和PLMN的信道质量信息进行PLMN选择。
也就是说，终端设备采用上述PLMN选择方式可以是基于网络设备的指示，或者也可以根据终端设备的类型，或者根据待传输的业务的类型决定的。
可选地，所述第一信道质量阈值可以是终端设备的NAS通知所述终端设备的AS的。
可选地，所述终端设备的AS可以通知所述终端设备的NAS根据PLMN优先级排序和第一信道质量阈值进行PLMN选择，或者，根据PLMN优先级排序，PLMN的信道质量和第一信道质量阈值进行PLMN选择。
可选地，所述第一信道质量阈值对应特定终端，或者对应特定业务。
作为示例，不同的业务可以对应不同的第一信道质量阈值。
作为示例，当第一信道质量阈值对应特定终端时，其中，该第一信道质量阈值可以对应特定终端的特定业务，或者，也可以对应特定终端的所有业务。
可选地，所述第一信道质量阈值可以大于-110dbm。
步骤2：终端设备的AS层向终端设备的NAS层上报第一信息。
可选地，所述第一信息可以包括以下中的至少一项：
a、信道质量高于第一信道质量阈值的PLMN，此类PLMN对应高质量指示；
b、信道质量低于第一信道质量阈值的PLMN，或者，信道质量低于或等于第一信道质量阈值并且大于-110dbm的PLMN；
c、PLMN对应的信道质量信息；
d、第一信道质量阈值。
可选地，信息c中的PLMN对应的信道质量信息可以为信道b中的PLMN对应的信道质量，对于具有高质量指示的PLMN，NAS可以不必上报此类PLMN的信道质量。
可选地，信息c中的PLMN对应的信道质量信息可以包括终端设备搜索到的所有PLMN对应的信道质量。
可选地，信息c中的PLMN对应的信道质量信息可以包括终端设备搜索到的PLMN中信道质量高于第一信道质量阈值的PLMN的信道质量信息。
可选地，所述终端设备的AS可以基于终端设备的NAS的指示上报所有PLMN对应的信道质量信息，或者上报信道质量高于第一信道质量阈值的PLMN的信道质量信息。
即终端设备的NAS可以向终端设备的AS指示需要上报哪些PLMN的信道质量信息。
可选地，在该步骤2中，第一信息可以只包括信道质量高于第一信道质量阈值的PLMN，即只上报具有高质量指示的PLMN，能够降低信令开销，同时有利于辅助NAS选择到信道质量更优的PLMN。
应理解，在本申请一些实施例中，若终端设备搜索到的PLMN不存在信道质量高于第一信道质量阈值的PLMN，则终端设备AS可以回退到传统(legacy)网络选择方式，例如，根据第二PLMN优先级进行PLMN选择。或者，在向终端设备的NAS指示后，再回退到legacy网络选择方式，或者，指示终端设备的NAS按照终端设备的AS的指示执行后续的PLMN选择。
步骤3：终端设备的NAS根据PLMN优先级排序和第一信道质量阈值进行PLMN选择。
方式1：终端设备的NAS首先根据PLMN的优先级进行PLMN选择，然后根据PLMN的信道质量和第一信道质量阈值进行PLMN选择。
例如，首先将搜索到的PLMN按照优先级从高到低排序，选出优先级在一定范围的至少一个PLMN，如果该至少一个PLMN的数量为一个，可以将该一个PLMN确定为目标PLMN。如果该至少一个PLMN为多个PLMN，可以将该多个PLMN按照信道质量由高到低的顺序进行排序，选择信道质量高于第一信道质量阈值(即具有高质量指示的PLMN)的PLMN作为目标PLMN。
方式2：终端设备的NAS首先根据PLMN的信道质量和第一信道质量阈值进行PLMN选择，然后根据PLMN的优先级进行PLMN选择。
例如，首先将搜索到的PLMN按照信道质量从高到低排序，选出信道质量高于第一信道质量阈值(即具有高质量指示的PLMN)的至少一个PLMN，如果该至少一个PLMN的数量为一个，可以将该一个PLMN确定为目标PLMN。如果该至少一个PLMN为多个PLMN，可以将该多个PLMN按照优先级由高到低的顺序进行排序，选择优先级最高的PLMN作为目标PLMN。
步骤4：终端设备的AS获取终端设备的NAS选择的目标PLMN，进一步进行小区的选择或驻留等。
综上，对于特定终端，或者特定业务，终端设备基于PLMN优先级排序和PLMN的信道质量信息进行PLMN选择，相当于考虑了终端设备的设备部署情况，位置、信道质量等信息，有利于终端设备选择到合适的PLMN，进而保证业务的连续传输。
上文结合图2，从终端设备的角度详细描述了根据本申请实施例的网络选择的方法，下文结合图3，从网络设备的角度详细描述根据本申请另一实施例的网络选择的方法。应理解，网络设备侧的描述与终端设备侧的描述相互对应，相似的描述可以参见上文，为避免重复，此处不再赘述。
图3是根据本申请另一实施例的网络选择的方法300的示意性流程图，该方法300可以由图1所示的通信系统中的网络设备执行，如图3所示，该方法300包括如下内容：
S310，网络设备向终端设备发送指示信息，所述指示信息用于指示所述终端设备进行公共陆地移动网络PLMN选择的方式。
在本申请一些实施例中，网络设备可以根据终端的设备类型，UE的设备部署，UE位置或网络的信道质量等信息，向所述终端设备发送所述指示信息。
在本申请一些实施例中，所述指示信息用于指示所述终端设备基于第一PLMN优先级排序进行PLMN选择，所述第一PLMN优先级排序与预定义的第二PLMN优先级排序不同。
在本申请一些实施例中，所述网络设备可以根据终端的设备类型，UE的设备部署，UE位置或网络的信道质量等信息，向所述终端设备指示所述第一PLMN优先级排序。
在本申请一些实施例中，所述第一PLMN优先级排序对应特定终端或特定业务。
在本申请一些实施例中，所述指示信息用于指示所述终端设备根据PLMN优先级和PLMN的信道质量信息进行PLMN选择；或者
所述指示信息用于指示所述终端设备根据PLMN优先级和第一信道质量阈值进行PLMN选择；或者
所述指示信息用于指示所述终端设备根据PLMN优先级、第一信道质量阈值和PLMN的信道质量信息进行PLMN选择。
在本申请一些实施例中，所述指示信息对应特定终端或特定业务。
在本申请一些实施例中，所述指示信息通过系统消息或专用信令发送。
应理解，该方法300中的指示信息可以对应于方法200中的第一指示信息和第二指示信息，具体实现参考方法200中第一指示信息和第二指示信息的相关实现，为了简洁，这里不再赘述。
上文结合图2至图3，详细描述了本申请的方法实施例，下文结合图4至图7，详细描述本申请的装置实施例，应理解，装置实施例与方法实施例相互对应，类似的描述可以参照方法实施例。
图4示出了根据本申请实施例的终端设备400的示意性框图。如图4所示，该终端设备400包括：
处理单元410，用于根据公共陆地移动网络PLMN的优先级排序和/或PLMN的信道质量信息进行PLMN选择。
在一些实施例中，所述处理单元410具体用于：
所述终端设备根据第一PLMN优先级排序进行PLMN选择，其中，所述第一PLMN优先级排序与预定义的第二PLMN优先级排序不同。
在一些实施例中，所述第一PLMN优先级排序对应特定终端，或所述第一PLMN优先级排序对应特定业务，或所述第一PLMN优先级排序对应所述终端设备的特定业务。
在一些实施例中，所述第一PLMN优先级排序是网络设备指示的，或者是预定义的。
在一些实施例中，所述处理单元410还用于：
在接收到网络设备的第一指示信息的情况下，根据所述第一PLMN优先级排序进行PLMN选择，其中，所述第一指示信息用于指示所述终端设备基于所述第一PLMN优先级排序进行PLMN选择。
在一些实施例中，所述第一指示信息对应特定终端或特定业务。
在一些实施例中，所述第一指示信息通过系统信息或专用信令发送。
在一些实施例中，所述处理单元410还用于：
根据第一信息和所述第一PLMN优先级进行PLMN选择，其中，所述第一信息包括所述终端设备的接入层AS向所述终端设备的非接入层NAS上报的PLMN的搜索结果和/或PLMN的信道质量信息。
在一些实施例中，所述处理单元410还用于：
将所述PLMN的搜索结果中优先级最高的PLMN，或优先级高于第一优先级阈值的PLMN确定为目标PLMN。
在一些实施例中，所述第一优先级阈值是预定义的，或者是由网络设备指示的。
在一些实施例中，所述第一优先级阈值是通过系统信息或专用信令指示的。
在一些实施例中，所述处理单元410还用于：
根据第一信息，结合PLMN优先级排序和PLMN的信道质量信息进行PLMN选择，其中，所述第一信息包括所述终端设备的AS向所述终端设备的NAS上报的PLMN的搜索结果和/或PLMN的信道质量信息。
在一些实施例中，所述处理单元410还用于：
在接收到网络设备的第二指示信息的情况下，根据所述第一信息，结合PLMN优先级排序和PLMN的信道质量信息进行PLMN选择，其中，所述第二指示信息用于指示所述终端设备根据PLMN优先级和PLMN的信道质量信息进行PLMN选择。
在一些实施例中，所述第二指示信息对应特定终端，或者所述第二指示信息对应特定业务，或者所述第二指示信息对应所述终端设备的特定业务。
在一些实施例中，所述第二指示信息通过系统信息或专用信令发送。
在一些实施例中，所述处理单元410还用于：
根据所述PLMN的搜索结果和所述PLMN优先级排序，确定第一PLMN集合；
根据所述第一PLMN集合中的PLMN的信道质量信息，确定目标PLMN。
在一些实施例中，所述第一PLMN集合包括以下PLMN中的至少一种：
所述PLMN的搜索结果中在所述PLMN优先级排序中优先级最高的PLMN；
所述PLMN的搜索结果中在所述PLMN优先级排序中优先级高于第二优先级阈值的PLMN。
在一些实施例中，所述第二优先级阈值是网络设备指示的，或者是预定义的。
在一些实施例中，所述第二优先级阈值通过系统信息或专用信令指示。
在一些实施例中，所述目标PLMN包括以下中的至少一种：
所述第一PLMN集合中信道质量最高的PLMN；
所述第一PLMN集合中信道质量高于第一信道质量阈值的PLMN；
所述第一PLMN集合中信道质量被指示为高质量的PLMN；
所述PLMN的信道质量信息中信道质量满足高质量条件的PLMN。
在一些实施例中，所述第一信道质量阈值是网络设备指示的，或者是预定义的。
在一些实施例中，所述第一信道质量阈值通过系统信息或专用信令指示。
在一些实施例中，所述处理单元410还用于：
根据所述终端设备的AS上报的PLMN的信道质量信息，确定第二PLMN集合；
根据所述PLMN优先级排序，在所述第二PLMN集合中确定目标PLMN。
在一些实施例中，所述第二PLMN集合包括以下PLMN中的至少一种：
所述PLMN的信道质量信息中信道质量最高的PLMN；
所述PLMN的信道质量信息中高于第二信道质量阈值的PLMN；
所述终端设备的AS上报的PLMN中信道质量被指示为高质量的PLMN；
所述PLMN的信道质量信息中信道质量满足高质量条件的PLMN。
在一些实施例中，所述第二信道质量阈值是网络设备指示的，或者是预定义的。
在一些实施例中，所述第二信道质量阈值通过系统信息或专用信令指示。
在一些实施例中，所述目标PLMN包括以下中的至少一种：
所述第二PLMN集合中在所述PLMN优先级排序中优先级最高的PLMN；
所述第二PLMN集合中在所述PLMN优先级排序中优先级高于第三优先级阈值的PLMN。
在一些实施例中，所述第三优先级阈值是网络设备指示的，或者是预定义的。
在一些实施例中，所述第三优先级阈值通过系统信息或专用信令指示。
在一些实施例中，所述第一信息包括以下中的至少一项：
信道质量满足第一条件的PLMN；
所述信道质量满足第一条件的PLMN的信道质量信息；
所述终端设备搜索到的所有PLMN的信道质量信息。
在一些实施例中，所述信道质量满足第一条件的目标PLMN包括以下中的至少一种：
信道质量满足高质量条件的PLMN；
被指示为高质量的PLMN；
信道质量不满足高质量条件的PLMN。
在一些实施例中，所述信道质量满足高质量条件的PLMN包括以下中的至少一种：
信道质量大于-110dbm的PLMN；
信道质量大于第三信道质量阈值的PLMN。
在一些实施例中，所述信道质量不满足高质量条件的PLMN包括以下中的至少一种：
信道质量小于-110dbm的PLMN；
信道质量小于第三信道质量阈值的PLMN；
信道质量大于-110dbm且小于或等于第三信道质量阈值的PLMN。
在一些实施例中，所述第一信息还包括所述第三信道质量阈值。
在一些实施例中，所述处理单元410还用于：
在接收所述终端设备的NAS发送的第三指示信息的情况下，在AS向NAS发送特定PLMN的信道质量信息和/或所述第三信道质量阈值，其中，所述第三指示信息用于指示上报所述特定PLMN的信道质量信息和/或所述第三信道质量阈值。
在一些实施例中，所述特定PLMN包括以下情况的至少一种：
所述终端设备搜索到的所有PLMN；
所述所有PLMN中信道质量高于所述第三信道质量阈值的PLMN。
可选地，在一些实施例中，上述通信单元可以是通信接口或收发器，或者是通信芯片或者片上系统的输入输出接口。上述处理单元可以是一个或多个处理器。
应理解，根据本申请实施例的终端设备400可对应于本申请方法实施例中的终端设备，并且终端设备400中的各个单元的上述和其它操作和/或功能分别为了实现图2所示方法200中终端设备的相应流程，为了简洁，在此不再赘述。
图5是根据本申请实施例的网络设备的示意性框图。图5的网络设备500包括：
通信单元510，用于向终端设备发送指示信息，所述指示信息用于指示所述终端设备进行公共陆地移动网络PLMN选择的方式。
在一些实施例中，所述指示信息用于指示所述终端设备基于第一PLMN优先级排序进行PLMN选择，所述第一PLMN优先级排序与预定义的第二PLMN优先级排序不同。
在一些实施例中，所述第一PLMN优先级排序对应特定终端或特定业务。
在一些实施例中，所述指示信息用于指示所述终端设备根据PLMN优先级和PLMN的信道质量 信息进行PLMN选择；或者
所述指示信息用于指示所述终端设备根据PLMN优先级和第一信道质量阈值进行PLMN选择；或者
所述指示信息用于指示所述终端设备根据PLMN优先级、第一信道质量阈值和PLMN的信道质量信息进行PLMN选择。
在一些实施例中，所述指示信息对应特定终端或特定业务。
在一些实施例中，所述指示信息通过系统消息或专用信令发送。
可选地，在一些实施例中，上述通信单元可以是通信接口或收发器，或者是通信芯片或者片上系统的输入输出接口。上述处理单元可以是一个或多个处理器。
应理解，根据本申请实施例的网络设备500可对应于本申请方法实施例中的网络设备，并且网络设备500中的各个单元的上述和其它操作和/或功能分别为了实现图3所示方法300中网络设备的相应流程，为了简洁，在此不再赘述。
图6是本申请实施例提供的一种通信设备600示意性结构图。图6所示的通信设备600包括处理器610，处理器610可以从存储器中调用并运行计算机程序，以实现本申请实施例中的方法。
可选地，如图6所示，通信设备600还可以包括存储器620。其中，处理器610可以从存储器620中调用并运行计算机程序，以实现本申请实施例中的方法。
其中，存储器620可以是独立于处理器610的一个单独的器件，也可以集成在处理器610中。
可选地，如图6所示，通信设备600还可以包括收发器630，处理器610可以控制该收发器630与其他设备进行通信，具体地，可以向其他设备发送信息或数据，或接收其他设备发送的信息或数据。
其中，收发器630可以包括发射机和接收机。收发器630还可以进一步包括天线，天线的数量可以为一个或多个。
可选地，该通信设备600具体可为本申请实施例的网络设备，并且该通信设备600可以实现本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该通信设备600具体可为本申请实施例的移动终端/终端设备，并且该通信设备600可以实现本申请实施例的各个方法中由移动终端/终端设备实现的相应流程，为了简洁，在此不再赘述。
图7是本申请实施例的芯片的示意性结构图。图7所示的芯片700包括处理器710，处理器710可以从存储器中调用并运行计算机程序，以实现本申请实施例中的方法。
可选地，如图7所示，芯片700还可以包括存储器720。其中，处理器710可以从存储器720中调用并运行计算机程序，以实现本申请实施例中的方法。
其中，存储器720可以是独立于处理器710的一个单独的器件，也可以集成在处理器710中。
可选地，该芯片700还可以包括输入接口730。其中，处理器710可以控制该输入接口730与其他设备或芯片进行通信，具体地，可以获取其他设备或芯片发送的信息或数据。
可选地，该芯片700还可以包括输出接口740。其中，处理器710可以控制该输出接口740与其他设备或芯片进行通信，具体地，可以向其他设备或芯片输出信息或数据。
可选地，该芯片可应用于本申请实施例中的网络设备，并且该芯片可以实现本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该芯片可应用于本申请实施例中的移动终端/终端设备，并且该芯片可以实现本申请实施例的各个方法中由移动终端/终端设备实现的相应流程，为了简洁，在此不再赘述。
应理解，本申请实施例提到的芯片还可以称为系统级芯片，系统芯片，芯片系统或片上系统芯片等。
图8是本申请实施例提供的一种通信系统900的示意性框图。如图8所示，该通信系统900包括终端设备910和网络设备920。
其中，该终端设备910可以用于实现上述方法中由终端设备实现的相应的功能，以及该网络设备920可以用于实现上述方法中由网络设备实现的相应的功能为了简洁，在此不再赘述。
应理解，本申请实施例的处理器可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现成可编程门阵列(Field Programmable Gate Array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器， 可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。
可以理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(Read-Only Memory，ROM)、可编程只读存储器(Programmable ROM，PROM)、可擦除可编程只读存储器(Erasable PROM，EPROM)、电可擦除可编程只读存储器(Electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(Static RAM，SRAM)、动态随机存取存储器(Dynamic RAM，DRAM)、同步动态随机存取存储器(Synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(Synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
应理解，上述存储器为示例性但不是限制性说明，例如，本申请实施例中的存储器还可以是静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synch link DRAM，SLDRAM)以及直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)等等。也就是说，本申请实施例中的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本申请实施例还提供了一种计算机可读存储介质，用于存储计算机程序。
可选的，该计算机可读存储介质可应用于本申请实施例中的网络设备，并且该计算机程序使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该计算机可读存储介质可应用于本申请实施例中的移动终端/终端设备，并且该计算机程序使得计算机执行本申请实施例的各个方法中由移动终端/终端设备实现的相应流程，为了简洁，在此不再赘述。
本申请实施例还提供了一种计算机程序产品，包括计算机程序指令。
可选的，该计算机程序产品可应用于本申请实施例中的网络设备，并且该计算机程序指令使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该计算机程序产品可应用于本申请实施例中的移动终端/终端设备，并且该计算机程序指令使得计算机执行本申请实施例的各个方法中由移动终端/终端设备实现的相应流程，为了简洁，在此不再赘述。
本申请实施例还提供了一种计算机程序。
可选的，该计算机程序可应用于本申请实施例中的网络设备，当该计算机程序在计算机上运行时，使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该计算机程序可应用于本申请实施例中的移动终端/终端设备，当该计算机程序在计算机上运行时，使得计算机执行本申请实施例的各个方法中由移动终端/终端设备实现的相应流程，为了简洁，在此不再赘述。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，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存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品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全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应所述以权利要求的保护范围为准。

Claims (54)

  1. 一种网络选择的方法，其特征在于，包括：
    终端设备根据公共陆地移动网络PLMN的优先级排序和/或PLMN的信道质量信息进行PLMN选择。
  2. 根据权利要求1所述的方法，其特征在于，所述终端设备根据公共陆地移动网络PLMN的优先级排序和/或PLMN的信道质量信息进行PLMN选择，包括：
    所述终端设备根据第一PLMN优先级排序进行PLMN选择，其中，所述第一PLMN优先级排序与预定义的第二PLMN优先级排序不同。
  3. 根据权利要求2所述的方法，其特征在于，所述第一PLMN优先级排序对应特定终端，或所述第一PLMN优先级排序对应特定业务，或所述第一PLMN优先级排序对应特定终端的特定业务。
  4. 根据权利要求2或3所述的方法，其特征在于，所述第一PLMN优先级排序是网络设备指示的，或者是预定义的。
  5. 根据权利要求2-4中任一项所述的方法，其特征在于，所述终端设备根据第一PLMN优先级排序进行PLMN选择，包括：
    所述终端设备在接收到网络设备的第一指示信息的情况下，根据所述第一PLMN优先级排序进行PLMN选择，其中，所述第一指示信息用于指示所述终端设备基于所述第一PLMN优先级排序进行PLMN选择。
  6. 根据权利要求5所述的方法，其特征在于，所述第一指示信息对应特定终端或特定业务。
  7. 根据权利要求5或6所述的方法，其特征在于，所述第一指示信息通过系统信息或专用信令发送。
  8. 根据权利要求2-7中任一项所述的方法，其特征在于，所述终端设备根据第一PLMN优先级排序进行PLMN选择，包括：
    所述终端设备根据第一信息和所述第一PLMN优先级进行PLMN选择，其中，所述第一信息包括所述终端设备的接入层AS向所述终端设备的非接入层NAS上报的PLMN的搜索结果和/或PLMN的信道质量信息。
  9. 根据权利要求8所述的方法，其特征在于，所述终端设备根据第一信息和所述第一PLMN优先级进行PLMN选择，包括：
    将所述PLMN的搜索结果中优先级最高的PLMN，或优先级高于第一优先级阈值的PLMN确定为目标PLMN。
  10. 根据权利要求9所述的方法，其特征在于，所述第一优先级阈值是预定义的，或者是由网络设备指示的。
  11. 根据权利要求9或10所述的方法，其特征在于，所述第一优先级阈值是通过系统信息或专用信令指示的。
  12. 根据权利要求1所述的方法，其特征在于，所述终端设备根据公共陆地移动网络PLMN的优先级排序和/或PLMN的信道质量信息进行PLMN选择，包括：
    所述终端设备根据第一信息，结合PLMN优先级排序和PLMN的信道质量信息进行PLMN选择，其中，所述第一信息包括所述终端设备的AS向所述终端设备的NAS上报的PLMN的搜索结果和/或PLMN的信道质量信息。
  13. 根据权利要求12所述的方法，其特征在于，所述终端设备根据第一信息，结合PLMN优先级排序和PLMN的信道质量信息进行PLMN选择，包括：
    所述终端设备在接收到网络设备的第二指示信息的情况下，根据所述第一信息，结合PLMN优先级排序和PLMN的信道质量信息进行PLMN选择，其中，所述第二指示信息用于指示所述终端设备根据PLMN优先级和PLMN的信道质量信息进行PLMN选择。
  14. 根据权利要求13所述的方法，其特征在于，所述第二指示信息对应特定终端，或者所述第二指示信息对应特定业务，或者所述第二指示信息对应特定终端的特定业务。
  15. 根据权利要求13或14所述的方法，其特征在于，所述第二指示信息通过系统信息或专用信令发送。
  16. 根据权利要求12-15中任一项所述的方法，其特征在于，所述终端设备根据第一信息，结合PLMN优先级排序和PLMN的信道质量信息进行PLMN选择，包括：
    根据所述PLMN的搜索结果和所述PLMN优先级排序，确定第一PLMN集合；
    根据所述第一PLMN集合中的PLMN的信道质量信息，确定目标PLMN。
  17. 根据权利要求16所述的方法，其特征在于，所述第一PLMN集合包括以下PLMN中的至少 一种：
    所述PLMN的搜索结果中在所述PLMN优先级排序中优先级最高的PLMN；
    所述PLMN的搜索结果中在所述PLMN优先级排序中优先级高于第二优先级阈值的PLMN。
  18. 根据权利要求17所述的方法，其特征在于，所述第二优先级阈值是网络设备指示的，或者是预定义的。
  19. 根据权利要求18所述的方法，其特征在于，所述第二优先级阈值通过系统信息或专用信令指示。
  20. 根据权利要求16-19中任一项所述的方法，其特征在于，所述目标PLMN包括以下中的至少一种：
    所述第一PLMN集合中信道质量最高的PLMN；
    所述第一PLMN集合中信道质量高于第一信道质量阈值的PLMN；
    所述第一PLMN集合中信道质量被指示为高质量的PLMN；
    所述PLMN的信道质量信息中信道质量满足高质量条件的PLMN。
  21. 根据权利要求20所述的方法，其特征在于，所述第一信道质量阈值是网络设备指示的，或者是预定义的。
  22. 根据权利要求21所述的方法，其特征在于，所述第一信道质量阈值通过系统信息或专用信令指示。
  23. 根据权利要求12-15中任一项所述的方法，其特征在于，所述终端设备根据第一信息，结合PLMN优先级排序和PLMN的信道质量信息进行PLMN选择，包括：
    根据所述终端设备的AS上报的PLMN的信道质量信息，确定第二PLMN集合；
    根据所述PLMN优先级排序，在所述第二PLMN集合中确定目标PLMN。
  24. 根据权利要求23所述的方法，其特征在于，所述第二PLMN集合包括以下PLMN中的至少一种：
    所述PLMN的信道质量信息中信道质量最高的PLMN；
    所述PLMN的信道质量信息中高于第二信道质量阈值的PLMN；
    所述终端设备的AS上报的PLMN中信道质量被指示为高质量的PLMN；
    所述PLMN的信道质量信息中信道质量满足高质量条件的PLMN。
  25. 根据权利要求24所述的方法，其特征在于，所述第二信道质量阈值是网络设备指示的，或者是预定义的。
  26. 根据权利要求25所述的方法，其特征在于，所述第二信道质量阈值通过系统信息或专用信令指示。
  27. 根据权利要求23-26中任一项所述的方法，其特征在于，所述目标PLMN包括以下中的至少一种：
    所述第二PLMN集合中在所述PLMN优先级排序中优先级最高的PLMN；
    所述第二PLMN集合中在所述PLMN优先级排序中优先级高于第三优先级阈值的PLMN。
  28. 根据权利要求27所述的方法，其特征在于，所述第三优先级阈值是网络设备指示的，或者是预定义的。
  29. 根据权利要求28所述的方法，其特征在于，所述第三优先级阈值通过系统信息或专用信令指示。
  30. 根据权利要求8-29中任一项所述的方法，其特征在于，所述第一信息包括以下中的至少一项：
    信道质量满足第一条件的PLMN；
    所述信道质量满足第一条件的PLMN的信道质量信息；
    所述终端设备搜索到的所有PLMN的信道质量信息。
  31. 根据权利要求20、24或30所述的方法，其特征在于，所述信道质量满足第一条件的目标PLMN包括以下中的至少一种：
    信道质量满足高质量条件的PLMN；
    被指示为高质量的PLMN；
    信道质量不满足高质量条件的PLMN。
  32. 根据权利要求31所述的方法，其特征在于，所述信道质量满足高质量条件的PLMN包括以下中的至少一种：
    信道质量大于-110dbm的PLMN；
    信道质量大于第三信道质量阈值的PLMN。
  33. 根据权利要求31或32所述的方法，其特征在于，所述信道质量不满足高质量条件的PLMN包括以下中的至少一种：
    信道质量小于-110dbm的PLMN；
    信道质量小于第三信道质量阈值的PLMN；
    信道质量大于-110dbm且小于或等于第三信道质量阈值的PLMN。
  34. 根据权利要求32或33所述的方法，其特征在于，所述第一信息还包括所述第三信道质量阈值。
  35. 根据权利要求32-34中任一项所述的方法，其特征在于，所述方法还包括：
    在接收所述终端设备的NAS发送的第三指示信息的情况下，所述终端设备的AS向所述终端设备的NAS发送特定PLMN的信道质量信息和/或所述第三信道质量阈值，其中，所述第三指示信息用于指示上报所述特定PLMN的信道质量信息和/或所述第三信道质量阈值。
  36. 根据权利要求35所述的方法，其特征在于，所述特定PLMN包括以下情况的至少一种：
    所述终端设备搜索到的所有PLMN；
    所述所有PLMN中信道质量高于所述第三信道质量阈值的PLMN。
  37. 一种网络选择的方法，其特征在于，包括：
    网络设备向终端设备发送指示信息，所述指示信息用于指示所述终端设备进行公共陆地移动网络PLMN选择的方式。
  38. 根据权利要求37所述的方法，其特征在于，所述指示信息用于指示所述终端设备基于第一PLMN优先级排序进行PLMN选择，所述第一PLMN优先级排序与预定义的第二PLMN优先级排序不同。
  39. 根据权利要求38所述的方法，其特征在于，所述第一PLMN优先级排序对应特定终端，或者，所述第一PLMN优先级排序对应特定业务，或者，所述第一PLMN优先级排序对应特定终端的特定业务。
  40. 根据权利要求37所述的方法，其特征在于，所述指示信息用于指示所述终端设备根据PLMN优先级和PLMN的信道质量信息进行PLMN选择；或者
    所述指示信息用于指示所述终端设备根据PLMN优先级和第一信道质量阈值进行PLMN选择；或者
    所述指示信息用于指示所述终端设备根据PLMN优先级、第一信道质量阈值和PLMN的信道质量信息进行PLMN选择。
  41. 根据权利要求37-40中任一项所述的方法，其特征在于，所述指示信息对应特定终端或特定业务。
  42. 根据权利要求37-41中任一项所述的方法，其特征在于，所述指示信息通过系统消息或专用信令发送。
  43. 一种终端设备，其特征在于，包括：
    处理单元，用于根据公共陆地移动网络PLMN的优先级排序和/或PLMN的信道质量信息进行PLMN选择。
  44. 一种网络设备，其特征在于，包括：
    通信单元，用于向终端设备发送指示信息，所述指示信息用于指示所述终端设备进行公共陆地移动网络PLMN选择的方式。
  45. 一种终端设备，其特征在于，包括：处理器和存储器，该存储器用于存储计算机程序，所述处理器用于调用并运行所述存储器中存储的计算机程序，执行如权利要求1至36中任一项所述的方法。
  46. 一种芯片，其特征在于，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片的设备执行如权利要求1至36中任一项所述的方法。
  47. 一种计算机可读存储介质，其特征在于，用于存储计算机程序，所述计算机程序使得计算机执行如权利要求1至36中任一项所述的方法。
  48. 一种计算机程序产品，其特征在于，包括计算机程序指令，该计算机程序指令使得计算机执行如权利要求1至36中任一项所述的方法。
  49. 一种计算机程序，其特征在于，所述计算机程序使得计算机执行如权利要求1至36中任一项所述的方法。
  50. 一种网络设备，其特征在于，包括：处理器和存储器，该存储器用于存储计算机程序，所述处理器用于调用并运行所述存储器中存储的计算机程序，执行如权利要求37至42中任一项所述的方法。
  51. 一种芯片，其特征在于，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片的设备执行如权利要求37至42中任一项所述的方法。
  52. 一种计算机可读存储介质，其特征在于，用于存储计算机程序，所述计算机程序使得计算机执行如权利要求37至42中任一项所述的方法。
  53. 一种计算机程序产品，其特征在于，包括计算机程序指令，该计算机程序指令使得计算机执行如权利要求37至42中任一项所述的方法。
  54. 一种计算机程序，其特征在于，所述计算机程序使得计算机执行如权利要求37至42中任一项所述的方法。
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