WO2021134167A1 - 一种漫游的方法、装置及系统 - Google Patents

一种漫游的方法、装置及系统 Download PDF

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Publication number
WO2021134167A1
WO2021134167A1 PCT/CN2019/129816 CN2019129816W WO2021134167A1 WO 2021134167 A1 WO2021134167 A1 WO 2021134167A1 CN 2019129816 W CN2019129816 W CN 2019129816W WO 2021134167 A1 WO2021134167 A1 WO 2021134167A1
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WO
WIPO (PCT)
Prior art keywords
plmn
information
terminal device
priority
access
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Application number
PCT/CN2019/129816
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English (en)
French (fr)
Inventor
朱方园
李岩
刘建宁
Original Assignee
华为技术有限公司
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.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2019/129816 priority Critical patent/WO2021134167A1/zh
Priority to CN201980103294.1A priority patent/CN114902742A/zh
Priority to EP19958397.2A priority patent/EP4064761A4/en
Publication of WO2021134167A1 publication Critical patent/WO2021134167A1/zh
Priority to US17/851,992 priority patent/US20220330006A1/en

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    • 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
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/18—Management of setup rejection or failure
    • 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
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer
    • H04W8/12—Mobility data transfer between location registers or mobility servers

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular, to a roaming method, device, and system.
  • HPLMN Home Public Land Mobile Network
  • the terminal device cannot access the HPLMN.
  • HPLMN Public Land Mobile Network
  • Business network leading to longer service waiting time for terminal equipment.
  • the embodiments of the present application provide a roaming method, device, and system, which can shorten the time for the terminal device to wait for service recovery when the HPLMN corresponding to the terminal device fails.
  • an embodiment of the present application provides a roaming method.
  • the method includes: a terminal device obtains information of a first PLMN, wherein there is a dynamic roaming agreement between the first PLMN and the second PLMN; if the terminal device cannot access the second PLMN, the terminal device The information of the first PLMN sends an access request to the first PLMN.
  • the terminal device can shorten the time for the terminal device to wait for service recovery after the HPLMN fails.
  • the acquiring, by the terminal device, the information of the first PLMN includes: during the process of the terminal device being registered with the second PLMN, the terminal device receiving information from the second PLMN The information of the first PLMN of the core network element in the PLMN.
  • the terminal device acquiring information of the first PLMN includes: the terminal device sends a registration request to a core network element in the first PLMN; and the terminal device receives information from The registration rejection message of the core network element; the terminal device obtains the information of the first PLMN according to the registration rejection message.
  • the registration rejection message includes information of the first PLMN, and/or the registration rejection message includes a dynamic roaming agreement between the first PLMN and the second PLMN Inactive instructions.
  • the terminal device sending an access request to the first PLMN according to the information of the first PLMN includes: if for each PLMN with a higher priority than the first PLMN, None of the terminal devices can be accessed, and the terminal device sends an access request to the first PLMN.
  • the method further includes: the terminal device receives a notification message from the first PLMN, where the notification message is used to notify the terminal device of the relationship between the first PLMN and the first PLMN.
  • the dynamic roaming agreement between the two PLMNs is activated, and the notification message includes the information of the first PLMN; the terminal device sends an access request to the first PLMN according to the information of the first PLMN, including: The terminal device sends an access request to the first PLMN according to the notification message.
  • the method further includes: if the terminal device cannot access the first PLMN, the terminal device does not add the first PLMN to the list of prohibited PLMNs.
  • the information of the first PLMN includes identification information of the first PLMN.
  • the information of the first PLMN further includes at least one of the following information: the type of access technology that allows the terminal device to access the first PLMN, and the type of access technology that allows the terminal device to access Enter the area information of the first PLMN, the condition for the terminal device to access the first PLMN, and the priority information of the first PLMN.
  • the priority information of the first PLMN includes that the priority of the first PLMN is lower than the priority of any one of the following PLMNs: the priority of the second PLMN, the priority of the second PLMN, and the priority of the second PLMN.
  • the priority information of the first PLMN includes: the priority of the first PLMN is higher than the priority of the PLMN selected by the user according to the quality of service requirements, or the priority of the first PLMN The priority is lower than the priority of the PLMN controlled by the operator and higher than the priority of the PLMN selected by the user according to the quality of service requirements.
  • the condition for the terminal device to access the first PLMN includes: the terminal device receives the first PLMN sent by the first PLMN for indicating the relationship between the first PLMN and the second PLMN. Information indicating that dynamic roaming between PLMNs is activated, and/or, for each PLMN with a priority higher than the first PLMN, the terminal device cannot access it.
  • the terminal device stores the information of the first PLMN in the PLMN selection list of the terminal device.
  • an embodiment of the present application provides a communication method.
  • the method includes: an access management network element in the second PLMN receives a registration request message from a terminal device; the access management network element sends a registration acceptance message to the terminal device, and the registration acceptance message includes the first PLMN's Information, wherein there is a dynamic roaming agreement between the first PLMN and the second PLMN.
  • the information of the first PLMN includes identification information of the first PLMN.
  • the information of the first PLMN further includes at least one of the following information: the type of access technology that allows the terminal device to access the first PLMN, and the type of access technology that allows the terminal device to access Enter the area information of the first PLMN, the condition for the terminal device to access the first PLMN, and the priority information of the first PLMN.
  • the type of access technology that allows the terminal device to access the first PLMN and the type of access technology that allows the terminal device to access Enter the area information of the first PLMN
  • the condition for the terminal device to access the first PLMN the priority information of the first PLMN.
  • the access management network element obtains the subscription data of the terminal device from the unified data management network element, and the subscription data includes the information of the first PLMN.
  • an embodiment of the present application provides a communication device.
  • the device includes: a processing unit for acquiring information of a first public land mobile network PLMN, wherein there is a dynamic roaming agreement between the first PLMN and the second PLMN, and also for determining that the communication device cannot access the communication device.
  • the second PLMN a sending unit, configured to send an access request to the first PLMN according to the information of the first PLMN.
  • the communication device may be a terminal device.
  • an embodiment of the present application provides a communication device.
  • the apparatus includes: a receiving unit to receive a registration request message from a terminal device; a sending unit to send a registration acceptance message to the terminal device, where the registration acceptance message includes information about a first PLMN, where the first PLMN There is a dynamic roaming agreement with the second PLMN to which the communication device belongs.
  • the communication device may be an access management network element.
  • the first PLMN and the second PLMN have the same mobile country code, and the mobile network code of the first PLMN is different from the mobile network code of the second PLMN.
  • the dynamic roaming agreement between the first PLMN and the second PLMN includes: if the terminal device can access the second PLMN, the first PLMN The roaming agreement between a PLMN and the second PLMN is deactivated; if the terminal device cannot access the second PLMN, the roaming agreement between the first PLMN and the second PLMN is activated.
  • the first PLMN is a visited public land mobile network VPLMN
  • the second PLMN is a home public land mobile network HPLMN.
  • the present application provides a communication device, including a processor, which reads computer-readable instructions stored in a memory, so that the communication device executes the first aspect or any one of the possibilities of the first aspect.
  • the method in the implementation mode includes a processor, which reads computer-readable instructions stored in a memory, so that the communication device executes the first aspect or any one of the possibilities of the first aspect.
  • the present application provides a communication device including a processor that reads computer-readable instructions stored in a memory, so that the communication device executes the second aspect or any one of the second aspects. The method in the implementation.
  • this application provides a communication system.
  • the communication system includes the communication device in the fourth aspect or the sixth aspect and an access network device connected to the communication device.
  • the communication device communicates with the terminal device through the access network device.
  • the present application provides a computer-readable storage medium, including computer-readable instructions, which when executed on a computer, cause the computer to execute any one of the methods in the first aspect or the second aspect.
  • this application provides a computer program product, including a computer program, which when the program runs on a computer, causes the computer to execute any one of the methods in the first aspect or the second aspect.
  • this application provides a chip or chip system.
  • the chip or chip system includes at least one processor and a communication interface, the communication interface is coupled with at least one processor, and the processor is used to run a computer program or instruction to execute the method in the first aspect or any possible implementation of the first aspect ,
  • the communication interface is used to communicate with other modules outside the chip.
  • FIG. 1 is a schematic diagram of a scenario to which an embodiment of this application is applicable
  • Figure 2 is a schematic diagram of a 5G network to which an embodiment of the application is applicable;
  • FIG. 3 is a schematic diagram of a roaming method according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of another roaming method according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of another roaming method according to an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 7 is a schematic structural diagram of another communication device provided by an embodiment of this application.
  • FIG. 8 is a schematic structural diagram of a chip or chip system provided by an embodiment of the application.
  • words such as “first” and “second” are used to distinguish similar content.
  • the first PLMN and the second PLMN are only for distinguishing different PLMNs, and the sequence of them is not limited.
  • words such as “first” and “second” do not limit the quantity and order of execution, and words such as “first” and “second” do not limit the difference.
  • At least one refers to one or more, and “multiple” refers to two or more.
  • “And/or” describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the associated objects before and after are in an “or” relationship.
  • the following at least one item (a)” or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a).
  • at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple .
  • a terminal device wants to obtain the service provided by the network, it needs to select a PLMN, reside in a suitable cell, and successfully complete the registration process.
  • PLMN selection can be divided into automatic mode and manual mode according to the operation mode.
  • the terminal device automatically starts from the PLMN with the highest priority according to the priority order of each PLMN in the PLMN list, and if it succeeds, it selects a suitable cell for camping on the PLMN. If the selection of a high-priority PLMN fails, the terminal device tries the second-priority PLMN until the terminal device can successfully register to a certain PLMN.
  • the terminal device will present a list of currently available PLMNs to the user (for example: present in priority order). The user selects the appropriate PLMN to access according to the presented PLMN list.
  • the automatic mode it can be divided into PLMN selection based on a priori information and initial PLMN selection based on whether there is a priori information.
  • the PLMN selection based on a priori information means that the terminal device records the last (for example: current) registered PLMN (Registered PLMN, RPLMN). When the terminal device is powered on next time or returns to the coverage area, RPLMN is selected with the highest priority. If RPLMN is unavailable, perform PLMN selection according to the initial selection method.
  • RPLMN Registered PLMN
  • the initial PLMN selection means that the middle terminal device selects the PLMN according to various PLMNs and their priorities recorded in the Universal Subscriber Identity Module (USIM) without prior information.
  • these PLMNs can be arranged in descending order of priority as follows (1) HPLMN; (2) Equivalent HPLMN (Equivalent HPLMN, EHPLMN); (3) User Controlled PLMN (User Controlled PLMN) ); (4) PLMN (Operator Controlled PLMN) controlled by the operator; (5) PLMN selected according to the quality of service requirements; (6) other PLMNs.
  • the user-controlled PLMN means that the user of the terminal device can select the corresponding PLMN according to preference.
  • the PLMN controlled by the operator is when the SIM is made.
  • the operator stores the PLMNs of other operators that have signed a roaming agreement with the operator in the terminal device SIM, and the terminal device can select the corresponding PLMN to access according to the stored PLMN .
  • the PLMN selected according to the quality of service requirements can be an indication information used to instruct the terminal equipment to select the corresponding PLMN according to the requirements of the quality of service, for example: select a network where the reference signal receiving power (RSRP) is not lower than -110dBm . If none of the above PLMNs (1) to (5) can be accessed, the terminal device can select other accessible PLMNs.
  • RSRP reference signal receiving power
  • these PLMNs will be set by the terminal device as prohibited PLMNs. For example: if the terminal device receives the reason information that the PLMN is not allowed "PLMN not allowed", the terminal device will add the PLMN to the SIM "forbidden PLMN" list.
  • the terminal equipment of a certain operator fails to access the PLMN of other operators that have not signed a roaming agreement, and the terminal equipment will put the failed PLMN into forbidden PLMN list.
  • the terminal device If the terminal device is in the automatic network selection mode, the terminal device will not subsequently try to access any PLMN in the forbidden PLMN list. If subsequent users manually try to access the PLMN and the registration is successful, the terminal device will delete the PLMN in the forbidden PLMN list.
  • the forbidden PLMN list is generated, the PLMN in the forbidden PLMN list will not be automatically deleted even if the terminal device is turned off or the SIM card is removed.
  • FIG. 1 is a schematic diagram of a scenario to which an embodiment of the present application is applicable.
  • the terminal device cannot access the second PLMN (for example, the second PLMN fails)
  • the terminal device can access the first PLMN according to the dynamic roaming agreement between the first PLMN and the second PLMN.
  • the second PLMN is HPLMN
  • the first PLMN Visited Land Mobile Network (VPLMN).
  • VPLMN Visited Land Mobile Network
  • the first PLMN and the second PLMN have the same mobile country code (Mobile Country Code, MCC), and the mobile network code (Mobile Network Code, MNC) of the first PLMN and the mobile network code of the second PLMN have the same mobile country code (MCC).
  • MCC Mobile Country Code
  • MNC Mobile Network Code
  • MCC Mobile Country Code
  • MNC Mobile Network Code
  • the failure of the PLMN may refer to the failure of the PLMN in the area where the terminal device is located, and does not necessarily refer to the failure of the entire PLMN.
  • FIG. 2 is a schematic diagram of a 5G network to which an embodiment of the present application is applicable.
  • the 5G network in Figure 2 adopts a service-oriented network architecture.
  • the embodiments of the present application may also adopt other 5G network architectures, which are not limited here.
  • the 5G network architecture shown in FIG. 2 includes: access network (AN) nodes and multiple network function (NF) network elements.
  • multiple NF network elements may include: user plane function (UPF) network elements, access and mobility management function (access and mobility management function, AMF) network elements, session management function (session management function, SMF) network element, policy control function (PCF) network element, network slice selection function (NSSF) network element, unified data management (UDM) network element, network warehouse function ( network repository function (NRF) network element, network exposure function (NEF) network element, data storage function network element (unified data repository, UDR), network management network element, etc.
  • the network architecture may also include terminal equipment, data network (DN) nodes, application function (AF) network elements, and so on.
  • the network management network element may be an operation and maintenance management (Operation Administration and Maintenance, OAM) system.
  • OAM Operaation Administration and Maintenance
  • the OAM system can communicate with other NF network elements through NEF network elements.
  • the OAM system can also directly communicate with other NF network elements, which is not limited in the embodiment of this application.
  • Each network element in FIG. 2 can be either a network element in a hardware device, a software function running on dedicated hardware, or a virtualization function instantiated on a platform (for example, a cloud platform).
  • the network elements included in the network architecture are not limited.
  • the network architecture may include any one or more of all the network elements shown in FIG. 2 above. Network elements.
  • the terminal device is an electronic device with wireless communication function, which can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; it can also be deployed on the water (such as ships, etc.); it can also be deployed in the air (such as airplanes). , Balloons and satellites etc.).
  • Terminal equipment can be user equipment (UE), mobile phone (mobile phone), tablet computer (pad), computer with wireless transceiver function, virtual reality (VR) terminal equipment, augmented reality (AR) ) Terminal equipment, wireless terminal equipment in industrial control, wireless terminal equipment in unmanned driving (self-driving), wireless terminal equipment in remote medical, wireless terminal equipment in smart grid (smart grid) Terminal equipment, wireless terminal equipment in transportation safety, wireless terminal equipment in smart city, wireless terminal equipment in smart home, etc.
  • An AN node can be a device that provides wireless access to the UE, including but not limited to evolved Node B (evolved node B, referred to as eNB), wireless fidelity access point (wireless-fidelity access point, referred to as WiFi AP), global Microwave interconnected access base station (worldwide interoperability for microwave access base station, WiMAX BS for short), base station in 5G network (for example, gNodeB, gNB), etc.
  • the AN node may also be a (radio access network, RAN) node or an access node in a subsequent evolved network.
  • UPF network elements can process messages.
  • UPF can perform functions such as user data forwarding, routing, data statistics, rate limiting, and statistics reporting.
  • the AMF network element can perform mobility management in the mobile network, such as user location update, user registration network, user handover, and so on.
  • AMF network elements can access the UE's non-access stratum (NAS) signaling (including session management (SM) signaling) through the N1 interface, and can also access the RAN signaling through the N2 interface , To complete the user registration process, the forwarding of SM signaling and mobility management.
  • the AMF network element can forward messages between the SMF network element and the UE.
  • the SMF network element can manage the sessions in the mobile network, such as session establishment, session modification, and session release.
  • PCF network elements can manage user policies, including mobility-related policies, Protocol Data Unit (PDU) session-related policies, such as quality of service (QoS) policies, charging policies, and so on.
  • PDU Protocol Data Unit
  • QoS quality of service
  • Network slicing is a logically isolated network used to support specific network capabilities and network characteristics. It can be end-to-end (E2E) including the entire network, or part of the network functions can be shared among multiple network slices.
  • E2E end-to-end
  • the 5G 5G mobile communication technology proposed by 3GPP is a key technology for network differentiation requirements. Generally, the network characteristics of different network slices are not the same, and the network slices are required to be isolated from each other without affecting each other. For example, network slicing for augmented reality (AR) or virtual reality (VR) services requires large bandwidth and low latency; network slicing for Internet of Things (IOT) services requires massive terminal access. But the bandwidth is small and there is no requirement for delay.
  • AR augmented reality
  • VR virtual reality
  • IOT Internet of Things
  • the UDM network element is responsible for managing the user's subscription data and other information, and the UDM network element can provide the user's subscription data to network elements such as AMF and SMF.
  • UDR network elements store structured data in the network, including user subscription data information and user policies.
  • UDM can read terminal contract data from UDR
  • PCF can read user policy information from UDR.
  • UDR can also be divided into two parts and merged with UDM and PCF network elements separately, instead of independent deployment.
  • the NRF network element stores the registration information of other functional network elements, and provides services for mutual search and discovery between network functional network elements based on the registration information.
  • NEF network elements are responsible for the authorization and control of network opening services and capabilities. AF network elements located outside the operator's network can provide network data to the network through NEF network elements, and can also obtain network open services and data through NEF.
  • the DN is used to provide data services to the UE, and can be the access destination of the user's PDU session.
  • the DN can be a PDN network, such as the Internet, IP multi-media service (IP multi-media Service, IMS), and so on.
  • IP multi-media Service IP multi-media Service, IMS
  • the AF network element can send requests to influence the SMF routing strategy, and is responsible for selecting and relocating applications in the local DN.
  • AF mainly performs dynamic policy/charging control on forwarding plane behavior. These services require dynamic policy and charging control.
  • AF transmits the dynamic session information needed by PCF,
  • the first PLMN and the second PLMN may both adopt the architecture shown in FIG. 2.
  • the first PLMN and the second PLMN may also adopt other network architectures, such as: Evolved Packet Core network (EPC) architecture or future evolved system architecture, which is not limited here.
  • EPC Evolved Packet Core network
  • FIG. 3 is a schematic diagram of a roaming method provided by an embodiment of the present application.
  • the roaming method includes:
  • the terminal device obtains information of the first PLMN.
  • the first PLMN may be the VPLMN of the terminal device
  • the second PLMN may be the HPLMN of the terminal device.
  • the deactivation of the roaming agreement between the first PLMN and the second PLMN may mean that there is no roaming agreement between the first PLMN and the second PLMN, or the first PLMN and the second PLMN The inter-roaming agreement is not available.
  • the activation of the roaming agreement between the first PLMN and the second PLMN means that there is a roaming agreement between the first PLMN and the second PLMN, or that there is a roaming agreement between the first PLMN and the second PLMN. Roaming agreements are available.
  • a dynamic roaming agreement between the first PLMN and the second PLMN includes: if the first condition is met, the roaming agreement between the first PLMN and the second PLMN is valid.
  • the first condition may be that the second PLMN fails, or the terminal device cannot access the second PLMN.
  • the dynamic roaming agreement may also be referred to as a temporary roaming agreement, which is not limited in this application.
  • the terminal device may obtain information of multiple first PLMNs, for example: first PLMN list information, and the first PLMN list contains multiple first PLMN information.
  • the terminal device can obtain the information of the first PLMN in the following two ways.
  • the terminal device In the process of the terminal device registering to the second PLMN, the terminal device receives information from the first PLMN of the core network element in the second PLMN.
  • the core network element is an access management network element.
  • the access management network element may be an AMF network element; when the first PLMN When the 4G network architecture is adopted with the second PLMN, the access management network element may be a mobility management entity (MME).
  • MME mobility management entity
  • the access management network element is an AMF network element for illustration.
  • the AMF network element obtains the subscription data of the terminal device from the UDM network element, and the subscription data includes the first PLMN Information.
  • the AMF sends a registration acceptance message to the terminal device.
  • the registration acceptance message includes the information of the first PLMN.
  • the AMF network element may also obtain the information of the first PLMN from other network elements in the second PLMN, for example, a PCF network element or an OAM network element.
  • the information of the first PLMN includes the identification information of the first PLMN, for example: the identity (ID) of the first PLMN.
  • the information of the first PLMN may also include at least one of the following information: the type of access technology that allows the terminal device to access the first PLMN, the area information that allows the terminal device to access the first PLMN, and the terminal device accesses the first PLMN.
  • the conditions and priority information of the first PLMN can be understood as when the terminal device sequentially attempts to access multiple PLMNs, among these multiple PLMNs, the priority of the terminal device to access the first PLMN or the terminal device access to the first PLMN order of.
  • the priority information of the first PLMN may also be referred to as the priority of the first PLMN in the network selection list of the terminal device, which is not limited herein.
  • the type of access technology that allows the terminal device to access the first PLMN includes the third generation partnership project (3rd Generation Partnership Project, 3GPP) access technology, and/or non-3GPP (Non-3GPP) access technology. ) Access technology.
  • 3GPP Third Generation Partnership Project
  • Non-3GPP Non-3GPP
  • the area information allowing the terminal device to access the first PLMN may include a tracking area (TA) identifier.
  • the area information may be the area information of the first PLMN that allows the terminal device to access the first PLMN in the area where the second PLMN fails. It can be understood that the area in the first PLMN that allows terminal equipment to access the first PLMN has an overlapping area with the area where the second PLMN fails, so that the terminal equipment located in the failure area of the second PLMN can be moved without moving.
  • the terminal device is allowed to access the first PLMN, which improves the service experience of the terminal device.
  • the condition for the terminal device to access the first PLMN may include: the terminal device receives a message sent by the first PLMN to indicate that the dynamic roaming protocol between the first PLMN and the second PLMN is activated. Indication information (condition 1), and/or, for each PLMN with a higher priority than the first PLMN, the terminal device cannot access (condition 2).
  • the priority information of the first PLMN includes that the priority of the first PLMN is lower than the priority of any one of the following PLMNs: the priority of the second PLMN, the PLMN (Equivalent PLMN, EPLMN of the second PLMN) ), the priority of the PLMN controlled by the user, and the priority of the PLMN controlled by the operator.
  • the network selection sequence of the terminal device is: (1) the second PLMN, (2) the equivalent PLMN of the second PLMN, (3) the user-controlled PLMN, (4) the operator-controlled PLMN, (5) the first PLMN.
  • the terminal device sequentially tries to access (1) the second PLMN, (2) the equivalent PLMN of the second PLMN, (3) the user-controlled PLMN, (4) the operator-controlled PLMN, but they cannot successfully access At this time, the terminal device can try to access the first PLMN.
  • the priority information of the first PLMN includes that the priority of the first PLMN is higher than the priority of the PLMN selected by the user according to the quality of service requirements, or the priority of the first PLMN is lower than that of the operator
  • the priority of the controlled PLMN is higher than the priority of the PLMN selected by the user according to the quality of service requirements.
  • the terminal device receives information from the first PLMN of the core network element in the first PLMN.
  • the terminal device sends a registration request to the AMF network element in the first PLMN.
  • the AMF network element judges whether the first PLMN and the second PLMN have signed a dynamic roaming agreement. If the first PLMN and the second PLMN do not sign a dynamic roaming agreement, or although a PLMN and the second PLMN have signed a dynamic roaming agreement, but the dynamic roaming agreement is not activated, the AMF network element refuses the terminal device to access the first PLMN.
  • the AMF network element sends a registration rejection message to the terminal device.
  • the registration rejection message includes information indicating that the dynamic roaming agreement between the first PLMN and the second PLMN is not activated.
  • the registration rejection message may also include the information of the first PLMN.
  • the terminal device stores the information of the first PLMN.
  • the terminal device may store the information of the first PLMN in the PLMN selection list of the terminal device.
  • the PLMN selection list of the terminal device may also be referred to as the PLMN network selection list of the terminal device, or a priority list for the terminal device to access the PLMN.
  • the PLMNs in the list have different priority orders, and the terminal equipment accesses the corresponding PLMN network in order from high to low priority.
  • the terminal device may also store the information of the first PLMN in other content of the terminal device, which is not limited in the embodiment of the present application.
  • the PLMN selection list of the terminal equipment is shown in Table 1:
  • PLMN priority PLMN list 1 HPLMN or EHPLM 2 User controlled PLMN 3 Operator controlled PLMN 4 Dynamic roaming PLMN 5 PLMN selected according to service quality requirements 6 Other PLMN
  • the network selection priority of PLMN is shown from high to low in the order from 1 to 6.
  • the PLMN in the order "1" corresponds to the highest network selection priority
  • the PLMN in the order "6" corresponds to The network selection priority is the lowest.
  • HPLMN or EHPLMN has the highest priority.
  • the user-controlled PLMN has the second level of priority.
  • Table 1 may also include the access technology type corresponding to the PLMN controlled by the user.
  • the PLMN controlled by the operator has the third level of priority.
  • Table 1 may also include the type of access technology corresponding to the PLMN controlled by the operator.
  • the dynamic roaming PLMN refers to the aforementioned first PLMN. Dynamic roaming PLMN has the fourth level of priority.
  • the terminal device After obtaining the information of the first PLMN, the terminal device stores the information of the first PLMN in the dynamic roaming PLMN.
  • the PLMN selected according to the quality of service requirements has the fifth level of priority.
  • the PLMN selected according to the service quality requirements means that the terminal equipment selects the PLMN that meets the quality requirements according to the signal quality and/or access technology type of each PLMN.
  • the information of the first PLMN (ie the dynamic roaming PLMN in Table 1) will be added to Table 1 only after the UE obtains the information of the first PLMN.
  • the dynamic roaming PLMN in Table 1 is The terminal equipment is dynamically generated according to the received dynamic roaming PLMN information.
  • the PLMN selection list of the terminal device does not include the information of the first PLMN, that is, the information of the first PLMN is not included in Table 1, so the terminal device will not consider the first PLMN in the network selection process. PLMN information.
  • the content in the foregoing Table 1 may be stored in a subscriber identity module (Subscriber Identity Module, SIM) of the terminal device.
  • SIM Subscriber Identity Module
  • the terminal device can select the corresponding PLMN to access in sequence according to the PLMN priority in Table 1.
  • the terminal device If the terminal device cannot access the second PLMN, the terminal device sends an access request to the first PLMN according to the information of the first PLMN.
  • the second PLMN if the second PLMN fails and the terminal device cannot access the second PLMN, the second PLMN will sign a dynamic roaming agreement with the first PLMN, or between the second PLMN and the first PLMN The dynamic roaming agreement is activated. The terminal device can try to access the first PLMN.
  • the access request may be a registration request.
  • the terminal device uses this type of access technology to access the first PLMN.
  • the terminal device may use the following two methods to send an access request to the first PLMN.
  • the terminal equipment sequentially accesses the corresponding PLMN according to the priority of each PLMN in Table 1. If the terminal device cannot access each PLMN with a priority higher than the first PLMN, the terminal device sends an access request to the first PLMN. Specifically, for HPLMN or EHPLM, user-controlled PLMN, and operator-controlled PLMN, if the terminal device cannot access, the terminal device sends an access request to the dynamic roaming PLMN.
  • priority can also be set among multiple dynamic roaming PLMNs, and the terminal device can select the corresponding dynamic roaming PLMN to access according to the priority of each dynamic roaming PLMN .
  • the terminal device may select the corresponding dynamic roaming PLMN to access according to the position sequence of each dynamic roaming PLMN in Table 1 or randomly.
  • the first PLMN After the second PLMN and the first PLMN sign a dynamic roaming agreement, or the dynamic roaming agreement between the second PLMN and the first PLMN is activated, the first PLMN sends a notification message to the terminal device, and the notification message is used to notify the terminal device of the first The dynamic roaming agreement between a PLMN and the second PLMN is activated.
  • the notification message may include the information of the first PLMN.
  • the terminal device sends an access request to the first PLMN according to the notification message.
  • the notification message may be a broadcast message sent by the access network device in the first PLMN.
  • the terminal device if the terminal device cannot access the first PLMN, the terminal device does not add the first PLMN to the list of forbidden PLMNs. If the first PLMN contains multiple PLMNs, the terminal device can select other PLMNs in the first PLMN and try to access. This can prevent the terminal device from being unable to select the first PLMN in the automatic network selection mode.
  • the terminal device obtains the information of the first PLMN, where there is a dynamic roaming agreement between the first PLMN and the second PLMN. If the second PLMN transmission fails and the terminal device cannot access the second PLMN, the terminal device sends an access request to the first PLMN according to the information of the first PLMN, thereby reducing the service waiting time of the terminal device and improving the user's service experience.
  • the roaming method according to the embodiment of the present application will be described in detail below.
  • VPLMN1 includes access network equipment (for example: RAN1) and access management network elements (for example: AMF1)
  • VPLMN2 includes Network equipment (for example: RAN2) and (for example: AMF2).
  • RAN1 and VPLMN2 may also include other network elements, which are not limited here.
  • the UE obtains the dynamic roaming PLMN list according to the registration rejection message from the VPLMN. Specifically, the method includes:
  • the UE performs PLMN selection.
  • the UE performs PLMN selection in the automatic network selection mode, and the UE may select corresponding PLMN access in sequence according to the priority order of HPLMN or EHPLM, user-controlled PLMN, and operator-controlled PLMN.
  • HPLMN or EHPLM user-controlled PLMN, and operator-controlled PLMN
  • VPLMN1 can be accessed in the current network
  • the UE selects VPLMN1 to access.
  • the above network selection sequence is only an example, and this application is not limited.
  • the UE can also choose to access VPLMN1 according to other network selection sequences. For example, the UE can directly select VPLMN1 to access.
  • the UE sends a registration request (registration request) message to AMF1 through RAN1 in VPLMN1.
  • the registration request message includes at least one of the following information: registration type, UE's permanent identity (for example: Subscription Permanent Identifier (SUPI)), UE's temporary identity, and security parameters , The requested network slice selection assistance information (Network Slice Selection Assistance Information, NSSAI), the UE's 5G core network capabilities, and so on.
  • AMF1 sends a registration reject (registration reject) message to the UE via RAN1.
  • AMF1 determines that the HPLMN of the UE has signed a dynamic roaming agreement with VPLMN1, but the dynamic roaming agreement has not yet been activated, then AMF1 refuses the UE to access VPLMN1.
  • AMF1 sends a registration rejection message to the UE.
  • the registration rejection message includes information about the reason for the rejection.
  • the reason information may be that the dynamic roaming agreement between VPLMN1 and HPLMN is not activated.
  • the registration rejection message may also include VPLMN1 information.
  • the UE adds the information of VPLMN1 to the dynamic roaming PLMN list.
  • the UE determines that the dynamic roaming agreement between VPLMN1 and HPLMN is not activated according to the reason information in the registration rejection message.
  • the UE adds the information of VPLMN1 to the dynamic roaming PLMN item in the PLMN selection list.
  • the priority of VPLMN1 is lower than the priority of the PLMN controlled by the operator and higher than the priority of the PLMN selected by the user according to the service quality requirements.
  • the UE sends a registration request message to AMF2 through RAN2 in VPLMN2.
  • the UE Since the UE cannot access VPLMN1, the UE selects VPLMN2 and tries to access.
  • AMF2 sends a registration rejection message to UE via RAN2.
  • the registration rejection message is similar to the registration rejection message in step 403. For details, refer to the description of 403.
  • the UE adds the information of VPLMN2 to the dynamic roaming PLMN list.
  • the dynamic roaming PLMN list may be the list of dynamic roaming PLMNs with the fourth priority in Table 1.
  • the UE determines that the dynamic roaming agreement between VPLMN2 and HPLMN is not activated according to the reason information in the registration rejection message.
  • the UE adds the information of VPLMN2 to the PLMN selection list stored locally by the UE.
  • the priority of VPLMN2 is lower than the priority of the PLMN controlled by the operator and higher than the priority of the PLMN selected by the user according to the service quality requirements.
  • the information of VPLMN1 and VPLMN2 is stored in the dynamic roaming PLMN list according to the receiving order, as shown in Table 2. If VPLMN1 and VPLMN2 have priorities with each other, the information of VPLMN1 and VPLMN2 is stored in the dynamic roaming PLMN list according to the order of priority.
  • the UE although the UE fails to register with VPLMN1 and VPLMN2, the UE will not add VPLMN1 and VPLMN2 to the list of forbidden PLMNs (forbidden PLMN). This is because once the UE adds VPLMN1 and VPLMN2 to the list of prohibited PLMNs, the UE will not subsequently try to access VPLMN1 and VPLMN2.
  • the UE realizes the update of the PLMN selection list.
  • HPLMN fails at a certain moment, the UE cannot access the HPLMN normally. At this time, the dynamic roaming agreement between HPLMN and VPLMN2 is activated.
  • the dynamic roaming protocol between HPLMN and VPLMN2 can be activated by HPLMN.
  • the OAM system of the HPLMN can send an indication message to the OAM system of the VPLMN2 for instructing to activate the dynamic roaming protocol between the HPLMN and the VPLMN2.
  • the dynamic roaming protocol between HPLMN and VPLMN2 can be activated by VPLMN2.
  • VPLMN2 learns that HPLMN has failed
  • the OAM system of VPLMN2 decides to activate the dynamic roaming protocol between HPLMN and VPLMN2.
  • the RAN2 in the VPLMN2 sends a notification message to the UE.
  • RAN2 sends a broadcast message to the UE in an area that allows dynamic roaming.
  • the area where dynamic roaming is allowed refers to the area where the UE is allowed to access the VPLMN2, and the area can be identified by TA.
  • RAN2 is located in an area where UEs are allowed to access VPLMN2. It can be understood that RAN2 belongs to TA-3 or TA-4.
  • the multiple RANs send broadcast messages to the UE at the same time.
  • the broadcast message includes information indicating that the dynamic roaming protocol between HPLMN and VPLMN2 is activated.
  • the broadcast message may also include VPLMN2 information.
  • the UE sends a registration request message to AMF2 through RAN2 in VPLMN2.
  • the UE After the UE receives the broadcast message, the UE tries to access VPLMN2 in the dynamic roaming PLMN list.
  • the UE selects the corresponding access technology type (such as Non-3GPP access in Table 2) and accesses the VPLMN2. If the information of the VPLMN2 stored by the UE also includes the area information that the UE accesses, after the UE accesses the VPLMN2, in order to ensure the normal operation of the service, the UE may also choose not to move out of the area.
  • the access technology type such as Non-3GPP access in Table 2
  • VPLMN2 fails to access the network, the UE will not put the VPLMN2 in the list of PLMNs forbidden to access. The UE may continue to try to access other PLMNs in the dynamic roaming PLMN list, such as VPLMN1.
  • the UE can periodically try to access a higher priority PLMN network, such as HPLMN, so that the UE can return to the HPLMN network again and switch from the dynamic roaming network to the home network, that is, to realize the deactivation of dynamic roaming.
  • a higher priority PLMN network such as HPLMN
  • VPLMN2 includes access network equipment (for example: RAN2) and access management network elements (for example: AMF2).
  • HPLMN includes UDM network elements and access management network elements (for example: AMF3).
  • VPLMN2 and HPLMN may also include other network elements, which are not limited here.
  • the UE obtains the dynamic roaming PLMN list through the registration process with HPLMN. Specifically, the method includes:
  • the UE performs PLMN selection.
  • the UE sends a registration request message to AMF3 in HPLMN.
  • the method for the UE to send the registration request message to the AMF3 in the HPLMN is similar to the method for sending the registration request message in 402. For details, refer to the description of 402.
  • the AMF3 obtains subscription data (subscription data) of the UE from the UDM network element.
  • the subscription data includes information about one or more dynamic roaming PLMNs, for example, information about VPLMN2.
  • information about VPLMN2 information refer to the description of the first PLMN information in 301 or the description in Table 2 in 407.
  • the UE completes other steps in the registration process, thereby successfully registering with the HPLMN.
  • AMF3 sends a registration acceptance message to the UE.
  • the registration acceptance message includes the dynamic roaming PLMN information, for example: VPLMN2 information.
  • VPLMN2 information For details, refer to the description of the first PLMN information in 301 or the description in Table 2 in 407.
  • the registration acceptance message may also include indication information, which is used to indicate that if the UE fails to access a dynamic roaming PLMN, the UE should not add the failed dynamic roaming PLMN to the forbidden access. List of imported PLMNs.
  • the UE After receiving the registration acceptance message, the UE stores the dynamic roaming PLMN information in its own dynamic roaming PLMN list. Refer to the description of 407 for details.
  • the UE realizes the update of the PLMN selection list.
  • the UE After the UE normally accesses the HPLMN, if the HPLMN fails, the UE cannot access the HPLMN. At this time, the dynamic roaming agreement between HPLMN and VPLMN2 is activated. Refer to the description of 408 for details.
  • the RAN2 in the VPLMN2 sends a notification message to the UE.
  • the UE selects VPLMN2.
  • the UE selects VPLMN2 for access according to the notification message in 506.
  • the VPLMN2 is selected to be accessed according to the identification information of the VPLMN2 included in the notification message.
  • VPLMN2 may not send notification messages to the UE.
  • the UE sequentially selects the corresponding PLMN to access according to the PLMN priority in the PLMN selection list (for example: Table 1). For a PLMN with a priority higher than VPLMN2, the UE cannot access it, and the UE chooses to access VPLMN2.
  • the UE sends a registration request message to AMF2 through RAN2 in VPLMN2.
  • Fig. 6 is a schematic diagram of a communication device in an embodiment of the present application. Specifically, it includes a processing unit 601, a receiving unit 602, and a sending unit 603. The communication device may also include a storage unit 604. The processing unit 601, the receiving unit 602, the sending unit 603, and the storage unit 604 may be physically separated units, or may be integrated into one or more physical units, which are not limited here.
  • the receiving unit 602 and the sending unit 603 are used to implement content interaction between the processing unit 601 and other units or network elements.
  • the sending unit 603 may be a sending circuit or a transmitter.
  • the receiving unit 602 may be a receiving circuit or a receiver.
  • the sending unit 603 and the receiving unit 602 may also be transceivers of the communication device.
  • the sending unit 603 and the receiving unit 602 may also be a communication interface or a transceiver circuit of the processing unit 601.
  • the sending unit 603 and the receiving unit 602 may be a transceiver chip.
  • the communication device may also include multiple sending units 603 and multiple receiving units 602.
  • the sending unit 603 and the receiving unit 602 may also be subunits of one or more transceiver units.
  • the processing unit 601 is used to implement data processing by the communication device.
  • the processing unit 601 may be a processing circuit or a processor.
  • the processor may be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP.
  • the processor may further include a hardware chip.
  • the above-mentioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof.
  • the above-mentioned PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (Generic Array Logic, GAL) or any combination thereof.
  • the communication device may also include multiple processing units or the processing unit 601 may include multiple sub-data processing units.
  • the processor may be a single-CPU (single-CPU) processor or a multi-core (multi-CPU) processor.
  • the storage unit 604 is used to store computer instructions executed by the processing unit 601.
  • the storage unit 604 may be a storage circuit or a memory.
  • the memory may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electrically available Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (RAM), which is used as an external cache.
  • the storage unit 604 may be a unit independent of the processing unit 601, or may be a storage unit in the processing unit 601, which is not limited herein. Although only one storage unit is shown in FIG. 6, the communication device may also include multiple storage units or the storage unit may include multiple sub-storage units.
  • the processing unit 601 may interact with other network elements through the sending unit 603 and the receiving unit 602. For example, the processing unit 601 obtains or receives content from other network elements.
  • the processing unit 601, the sending unit 603, the receiving unit 602, and the storage unit 604 may be connected to each other through a bus.
  • the bus may be a peripheral component interconnect standard (PCI) bus or an extended industry standard architecture (EISA) bus, etc.
  • PCI peripheral component interconnect standard
  • EISA extended industry standard architecture
  • the bus can be divided into address bus, data bus, control bus, etc.
  • the communication device may be the terminal device in the embodiment of FIG. 3 to FIG. 5.
  • the processing unit 601 is configured to obtain information of the first PLMN, where there is a dynamic roaming agreement between the first PLMN and the second PLMN, and is also configured to determine that the communication device cannot access the second PLMN;
  • the sending unit 603 is configured to send an access request to the first PLMN according to the information of the first PLMN.
  • the receiving unit 602 is configured to receive information of the first PLMN from a core network element in the second PLMN during the process of the communication device being registered with the second PLMN .
  • the processing unit 601 is configured to obtain the information of the first PLMN through the receiving unit 602.
  • the sending unit 603 is further configured to send a registration request to the core network element in the first PLMN; the receiving unit 602 is configured to receive a registration rejection from the core network element Message; the processing unit 601 is used to obtain information about the first PLMN according to the registration rejection message.
  • the registration rejection message includes information about the first PLMN, and/or the registration rejection message includes the dynamic roaming agreement between the first PLMN and the second PLMN. Activation instructions.
  • the processing unit 601 is further configured to, before the sending unit 603 sends the access request, determine that for each PLMN with a higher priority than the first PLMN, the communication device All cannot be accessed.
  • the receiving unit 602 is configured to receive a notification message from the first PLMN, and the notification message is used to notify the communication device between the first PLMN and the second PLMN
  • the dynamic roaming protocol is activated, the notification message includes the information of the first PLMN; the sending unit 603 is configured to send an access request to the first PLMN according to the notification message.
  • the processing unit 601 is further configured to determine that the communication device cannot access the first PLMN, and does not add the first PLMN to the list of prohibited PLMNs.
  • the first PLMN and the second PLMN have the same mobile country code, and the mobile network code of the first PLMN is different from the mobile network code of the second PLMN.
  • there is a dynamic roaming agreement between the first PLMN and the second PLMN including: if the communication device can access the second PLMN, the first PLMN and the second PLMN The roaming agreement between the second PLMN is deactivated; if the communication device cannot access the second PLMN, the roaming agreement between the first PLMN and the second PLMN is activated.
  • the information of the first PLMN includes at least one of the following information: identification information of the first PLMN, and the type of access technology that allows the communication device to access the first PLMN , Area information allowing the communication device to access the first PLMN, conditions for the communication device to access the first PLMN, and priority information of the first PLMN.
  • the priority information of the first PLMN includes that the priority of the first PLMN is lower than the priority of any one of the following PLMNs: the priority of the second PLMN, the priority of the second PLMN The priority of the equivalent PLMN, the priority of the PLMN controlled by the user, the priority of the PLMN controlled by the operator; or,
  • the priority information of the first PLMN includes: the priority of the first PLMN is higher than the priority of the PLMN selected by the user according to the quality of service requirements, or the priority of the first PLMN is lower than the PLMN controlled by the operator The priority is higher than the priority of the PLMN selected by the user according to the quality of service requirements.
  • the condition for the communication device to access the first PLMN includes: the receiving unit 602 receives the first PLMN sent by the first PLMN for indicating the first PLMN and the second PLMN Indication information indicating that dynamic roaming between PLMNs is activated, and/or, for each PLMN with a higher priority than the first PLMN, the communication device cannot access it.
  • the storage unit 604 is configured to store the information of the first PLMN in a PLMN selection list.
  • the first PLMN may be VPLMN
  • the second PLMN is HPLMN
  • the receiving unit 602 is configured to perform the signal receiving operation of the terminal device in the embodiment of FIG. 3 to FIG. 5.
  • the sending unit 603 is configured to perform the signal sending operation of the terminal device in the embodiments of FIG. 3 to FIG. 5.
  • the processing unit 601 is configured to perform the signal processing operations of the terminal device in the embodiments of FIG. 3 to FIG. 5.
  • the processing unit 601 causes the communication device to execute the operation of the terminal device in the embodiments of FIGS.
  • the communication device may also be the access management network element in FIG. 4 or FIG. 5, such as AM1, AMF2, or AMF3.
  • the receiving unit 602 is configured to perform the signal receiving operation of the AMF network element in the embodiment of FIG. 4 or FIG. 5.
  • the sending unit 603 is configured to perform the signal sending operation of the AMF network element in the embodiment of FIG. 4 or FIG. 5.
  • the processing unit 601 is configured to perform the signal processing operation of the AMF network element in the embodiment of FIG. 4 or FIG. 5. For details, refer to the description in the embodiment of FIG. 4 or FIG. 5.
  • the processing unit 601 causes the communication device to execute the operation of the AMF network element in the embodiment of FIG. 4 or FIG. 5 according to the computer instruction stored in the storage unit 604.
  • Fig. 7 is a schematic diagram of another communication device in an embodiment of the present application.
  • the communication device includes at least one processor 701, a transceiver 702, and a memory 703.
  • At least one processor 701, transceiver 702, and memory 703 are connected through a communication line 704.
  • the processor 701 may be a CPU, a microprocessor, an ASIC, or one or more integrated circuits for controlling the execution of the program of the present application.
  • the memory 703 is used to store computer-executed instructions for executing the solution of the present application, and the processor 701 controls the execution.
  • the processor 701 is configured to execute computer execution instructions stored in the memory 703, so as to implement the operation of the terminal device or the AMF network element in the above-mentioned embodiments of FIG.
  • the computer execution instructions in the embodiments of the present application may also be referred to as application program codes, which are not specifically limited in the embodiments of the present application.
  • the processor 701 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 7.
  • the processor 701 may be a single-CPU (single-CPU) processor, or may be a multi-core (multi-CPU) processor.
  • FIG. 8 is a schematic diagram of the structure of a chip or a chip system provided by an embodiment of the present application.
  • the chip or chip system includes one or more (including two) processors 801 and a communication interface 802.
  • the chip or chip system may further include a memory 803.
  • the memory 803 may include a read-only memory and a random access memory, and provides operation instructions and data to the processor 801.
  • the memory 803 stores the following elements, execution modules or data structures, or their subsets, or their extended sets.
  • the terminal device or the AMF network element in the embodiment of FIG. 3 to FIG. 5 is controlled to perform corresponding operations.
  • the computer program product includes one or more computer programs or instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, network equipment, user equipment, or other programmable devices.
  • the computer program or instruction may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer program or instruction may be transmitted from a website, a computer, or The server or data center transmits to another website site, computer, server or data center through wired or wireless means.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that integrates one or more available media.
  • the usable medium may be a magnetic medium, such as a floppy disk, a hard disk, and a magnetic tape; it may also be an optical medium, such as a digital video disc (digital video disc, DVD); and it may also be a semiconductor medium, such as a solid state drive (solid state drive). , SSD).

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Abstract

本申请实施例提供一种漫游方法、装置以及系统，其中，该方法包括：终端设备获取第一PLMN的信息，其中，所述第一PLMN与第二PLMN之间具有动态漫游协议；若所述终端设备无法接入所述第二PLMN，所述终端设备根据所述第一PLMN的信息向所述第一PLMN发送接入请求。通过第一PLMN与第二PLMN之间具有动态漫游协议，终端设备能够在该HPLMN发生故障后，缩短等待业务恢复的时间。。

Description

一种漫游的方法、装置及系统 技术领域
本申请实施例涉及通信技术领域，尤其涉及一种漫游的方法、装置及系统。
背景技术
在现有的通信网络中，当终端设备对应的归属公用陆地移动网(Home Public Land Mobile Network,HPLMN)发生故障时，该终端设备无法接入该HPLMN。通常情况下，HPLMN发生故障的区域还会存在其他运营商网络，但是这些运营商网络与HPLMN之间可能没有签订漫游协议，因此，终端设备只有等待该HPLMN故障恢复后，才能够接入其他运营商网络，从而导致终端设备的业务等待时间较长。
发明内容
本申请实施例提供一种漫游的方法、装置及系统，在终端设备对应的HPLMN发生故障时，能够缩短终端设备等待业务恢复的时间。
第一方面，本申请实施例提供一种漫游方法。该方法包括：终端设备获取第一PLMN的信息，其中，所述第一PLMN与第二PLMN之间具有动态漫游协议；若所述终端设备无法接入所述第二PLMN，所述终端设备根据所述第一PLMN的信息向所述第一PLMN发送接入请求。
在本申请的实施例中，通过第一PLMN与第二PLMN之间具有动态漫游协议，终端设备能够在该HPLMN发生故障后，缩短终端设备等待业务恢复的时间。
在一种可能的实现方式中，所述终端设备获取所述第一PLMN的信息，包括：在所述终端设备注册到所述第二PLMN的过程中，所述终端设备接收来自所述第二PLMN中的核心网网元的所述第一PLMN的信息。
在一种可能的实现方式中，所述终端设备获取所述第一PLMN的信息，包括：所述终端设备向所述第一PLMN中的核心网网元发送注册请求；所述终端设备接收来自所述核心网网元的注册拒绝消息；所述终端设备根据所述注册拒绝消息获取所述第一PLMN的信息。
在一种可能的实现方式中，所述注册拒绝消息包括所述第一PLMN的信息，和/或，所述注册拒绝消息包括所述第一PLMN与所述第二PLMN之间的动态漫游协议未激活的指示信息。
在一种可能的实现方式中，所述终端设备根据所述第一PLMN的信息向所述第一PLMN发送接入请求，包括：若对于每个优先级高于所述第一PLMN的PLMN，所述终端设备均无法接入，所述终端设备向所述第一PLMN发送接入请求。
在一种可能的实现方式中，所述方法还包括：所述终端设备接收来自所述第一PLMN的通知消息，所述通知消息用于通知所述终端设备所述第一PLMN与所述第二PLMN之间的动态漫游协议激活，所述通知消息包括所述第一PLMN的信息；所述终端设备根据所述第一PLMN的信息向所述第一PLMN发送接入请求，包括：所述终端设备根据所述通 知消息向所述第一PLMN发送接入请求。
在一种可能的实现方式中，所述方法还包括：若所述终端设备无法接入所述第一PLMN，所述终端设备不将所述第一PLMN加入禁止接入的PLMN的列表。
在一种可能的实现方式中，所述第一PLMN的信息包括所述第一PLMN的标识信息。
在一种可能的实现方式中，所述第一PLMN的信息还包括如下信息中的至少一种：允许所述终端设备接入所述第一PLMN的接入技术类型、允许所述终端设备接入所述第一PLMN的区域信息、所述终端设备接入所述第一PLMN的条件、所述第一PLMN的优先级信息。
在一种可能的实现方式中，所述第一PLMN的优先级信息包括所述第一PLMN的优先级低于如下任意一个PLMN的优先级：所述第二PLMN的优先级、所述第二PLMN的等效PLMN的优先级、用户控制的PLMN的优先级、运营商控制的PLMN的优先级。
在一种可能的实现方式中，所述第一PLMN的优先级信息包括：所述第一PLMN的优先级高于用户按照服务质量要求选择的PLMN的优先级，或者，所述第一PLMN的优先级低于运营商控制的PLMN的优先级并且高于用户按照服务质量要求选择的PLMN的优先级。
在一种可能的实现方式中，所述终端设备接入所述第一PLMN的条件包括：所述终端设备接收到所述第一PLMN发送的用于指示所述第一PLMN与所述第二PLMN之间的动态漫游被激活的指示信息，和/或，对于每个优先级高于所述第一PLMN的PLMN，所述终端设备均无法接入。
在一种可能的实现方式中，所述终端设备将所述第一PLMN的信息存储到所述终端设备的PLMN选择列表中。
第二方面，本申请实施例提供一种通信方法。该方法包括：第二PLMN中的接入管理网元接收来自终端设备的注册请求消息；所述接入管理网元向所述终端设备发送注册接受消息，所述注册接受消息包括第一PLMN的信息，其中，所述第一PLMN与第二PLMN之间具有动态漫游协议。
在一种可能的实现方式中，所述第一PLMN的信息包括所述第一PLMN的标识信息。
在一种可能的实现方式中，所述第一PLMN的信息还包括如下信息中的至少一种：允许所述终端设备接入所述第一PLMN的接入技术类型、允许所述终端设备接入所述第一PLMN的区域信息、所述终端设备接入所述第一PLMN的条件、所述第一PLMN的优先级信息。具体参见第一方面中关于第一PLMN的信息的描述。
在一种可能的实现方式中，所述接入管理网元从统一数据管理网元获取所述终端设备的签约数据，该签约数据包括所述第一PLMN的信息。
第三方面，本申请实施例提供一种通信装置。该装置包括：处理单元，用于获取第一公用陆地移动网PLMN的信息，其中，所述第一PLMN与第二PLMN之间具有动态漫游协议，还用于确定所述通信装置无法接入所述第二PLMN；发送单元，用于根据所述第一PLMN的信息向所述第一PLMN发送接入请求。
在一种可能的实现方式中，该通信装置可以是终端设备。
第四方面，本申请实施例提供一种通信装置。该装置包括：接收单元，接收来自终端设备的注册请求消息；发送单元，用于向所述终端设备发送注册接受消息，所述注册 接受消息包括第一PLMN的信息，其中，所述第一PLMN与所述通信装置所属的第二PLMN之间具有动态漫游协议。
在一种可能的实现方式中，该通信装置可以是接入管理网元。
在本申请的各实施例中，示例性的，第一PLMN与所述第二PLMN具有相同的移动国家码，所述第一PLMN的移动网络码与所述第二PLMN的移动网络码不同。
在本申请的各实施例中，示例性的，所述第一PLMN与所述第二PLMN之间具有动态漫游协议，包括：若所述终端设备能够接入所述第二PLMN，所述第一PLMN与所述第二PLMN之间的漫游协议去激活；若所述终端设备无法接入所述第二PLMN，所述第一PLMN与所述第二PLMN之间的漫游协议激活。
在本申请的各实施例中，示例性的，所述第一PLMN为拜访公用陆地移动网VPLMN，所述第二PLMN为归属公用陆地移动网HPLMN。
第五方面，本申请提供了一种通信装置，包括处理器，该处理器读取存储器中存储的计算机可读指令，以使得该通信装置执行上述第一方面或者第一方面任意一种可能的实现方式中的方法。
第六方面，本申请提供了一种通信装置，包括处理器，该处理器读取存储器中存储的计算机可读指令，以是的该通信装置执行上述第二方面或者第二方面任意一种可能的实现方式中的方法。
第七方面，本申请提供了一种通信系统。该通信系统包括上述第四方面或者第六方面中的通信装置以及与该通信装置连接的接入网设备。该通信装置通过该接入网设备与终端设备进行通信。
第八方面，本申请提供了一种计算机可读存储介质，包括计算机可读指令，当指令在计算机上运行时，使得计算机执行上述第一方面或者第二方面中任意一种方法。
第九方面，本申请提供了一种计算机程序产品，包括计算机程序，当程序在计算机上运行时，使得计算机执行上述第一方面或者第二方面中任意一种方法。
第十方面，本申请提供一种芯片或者芯片系统。该芯片或者芯片系统包括至少一个处理器和通信接口，通信接口和至少一个处理器耦合，处理器用于运行计算机程序或指令，以执行第一方面或第一方面的任意可能的实现方式中的方法，通信接口用于与芯片之外的其它模块进行通信。
附图说明
图1为本申请实施例适用的一种场景的示意图；
图2为本申请实施例适用的5G网络的示意图；
图3是本申请实施例的一种漫游方法的示意图；
图4是本申请实施例的另一种漫游方法的示意图；
图5是本申请实施例的再一种漫游方法的示意图；
图6为本申请实施例提供的一种通信装置的结构示意图；
图7为本申请实施例提供的另一种通信装置的结构示意图；
图8为本申请实施例提供的一种芯片或者芯片系统的结构示意图。
具体实施方式
为了便于清楚描述本申请实施例的技术方案，在本申请的实施例中，采用了“第一”、“第二”等词语对相似内容进行区分。例如，第一PLMN和第二PLMN仅仅是为了区分不同的PLMN，并不对其先后顺序进行限定。本领域技术人员可以理解“第一”、“第二”等词语并不对数量和执行次序进行限定，并且“第一”、“第二”等词语也并不限定一定不同。
需要说明的是，本申请中，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本申请中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其他实施例或设计方案更优选或更具优势。确切而言，使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念。
本申请实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
本申请中，“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，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的情况，其中A，B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a，b，或c中的至少一项(个)，可以表示：a，b，c，a-b，a-c，b-c，或a-b-c，其中a，b，c可以是单个，也可以是多个。
在通信网络中，终端设备要想获得网络提供的服务，就需要选择一个PLMN、驻留在一个合适的小区，并成功完成注册过程。其中，PLMN选择依据操作模式可以分为自动模式和手动两种方式。
自动模式：终端设备自动根据PLMN列表中各PLMN的优先级次序，从最高优先级的PLMN开始尝试，如果成功，则在该PLMN选择合适小区进行驻留。如果某个高优先级的PLMN选择失败，则终端设备尝试次优先级的PLMN，直到终端设备能成功注册到某个PLMN为止。
手动模式:终端设备会向用户呈现当前可用PLMN的列表(例如：按优先次序呈现)。用户根据呈现的PLMN的列表选择合适的PLMN接入。
在自动模式中，依据是否存在先验信息可以分为基于先验信息的PLMN选择和初始PLMN选择。
基于先验信息的PLMN选择，是指终端设备记录最近一次(例如：当前)注册的PLMN(Registered PLMN，RPLMN)。当该终端设备下一次开机或回到覆盖区时，以最高优先级选择RPLMN。如果RPLMN不可用，再按照初始选择的方法进行PLMN选择。
初始PLMN选择，是指中终端设备在没有先验信息的情况下，按照全球用户识别模块(Universal Subscriber Identity Module,USIM)中记录的各种PLMN及其优先级来选择PLMN。在一种可能的实现方式中，这些PLMN可以按照如下优先级由高到低排列(1)HPLMN；(2)等效HPLMN(Equivalent HPLMN,EHPLMN)；(3)用户控制的PLMN(User Controlled  PLMN)；(4)运营商控制的PLMN(Operator Controlled PLMN)；(5)按照服务质量要求选择的PLMN；(6)其他PLMN。其中，用户控制的PLMN是指终端设备的用户可以根据偏好选择对应的PLMN。运营商控制的PLMN是在制作SIM时，运营商将与该运营商签署了漫游协议的其他运营商的PLMN存储到该终端设备SIM中，终端设备可以根据该存储的PLMN选择对应的PLMN接入。按照服务质量要求选择的PLMN可以是一个指示信息，用于指示终端设备按照服务质量的要求选择对应的PLMN，例如：选择参考信号接收功率(Reference Signal Receiving Power,RSRP)不低于-110dBm的网络。若上述(1)～(5)的PLMN均无法接入，则终端设备可以选择其他可以接入的PLMN。
如果终端设备所在的区域存在多个可选的PLMN，但是终端设备在该多个可选的PLMN中的每一个PLMN的注册尝试都失败了，这些PLMN将被终端设备设置为被禁止访问的PLMN。例如：如果终端设备接收到PLMN不被允许“PLMN not allowed”的原因信息，终端设备会把该PLMN加入SIM里的禁止PLMN“forbidden PLMN”列表。
通常情况下，如果同一地区多个运营商间没有签订漫游协议，那么某个运营商的终端设备接入没有签订漫游协议的其他运营商的PLMN失败，则终端设备会将该失败的PLMN放入forbidden PLMN列表。如果该终端设备是自动选网模式，则终端设备后续不会再尝试接入该forbidden PLMN列表中的任一PLMN。如果后续用户手动尝试接入该PLMN，并且注册成功的话，终端设备会删除forbidden PLMN列表里这个PLMN。在自动选网模式或手动选网模式下，一旦forbidden PLMN列表生成，即使终端设备关机或者拔SIM卡，forbidden PLMN列表里的PLMN也不会自动删除。
请参阅图1，图1是本申请实施例适用的一种场景的示意图。当终端设备无法接入第二PLMN时(例如：第二PLMN发生故障)，终端设备可以根据第一PLMN和第二PLMN之间的动态漫游协议接入第一PLMN。
在一种可能的实现方式中，第二PLMN为HPLMN，第一PLMN为拜访公用陆地移动网(Visited Land Mobile Network,VPLMN)。
在一种可能的实现方式中，第一PLMN与第二PLMN具有相同的移动国家码(Mobile Country Code,MCC)，第一PLMN的移动网络码(Mobile Network Code,MNC)与第二PLMN的移动网络码不同。
在本申请的各实施例中，PLMN发生故障可以是指PLMN在终端设备所在区域的发生故障，并不一定指整个PLMN发生故障。
请参阅图2，图2是本申请实施例适用的5G网络的示意图。图2中的5G网络采用服务化的网络架构。本申请的实施例也可以采用其他5G网络架构，在此不做限定。
图2所示的5G网络架构包括：接入网(access network，AN)节点、以及多个网络功能(network function，NF)网元。其中，多个NF网元可以包括：用户面功能(user plane function，UPF)网元、接入和移动性管理功能(access and mobility management function，AMF)网元、会话管理功能(session management function，SMF)网元、策略控制功能(policy control function，PCF)网元、网络切片选择功能(network slice selection function，NSSF)网元、统一数据管理(unified data management，UDM)网元、网络仓库功能(network repository function，NRF)网元、网络开放功能(network exposure function，NEF)网元、数据存储功能网元(unified data repository，UDR)、网管网元等。另外，网络架构还可以 包括终端设备、数据网(data network，DN)节点、应用功能(application function，AF)网元等。
在本申请的实例例中，网管网元可以是操作维护管理(Operation Administration and Maintenance,OAM)系统。OAM系统可以通过NEF网元与其他NF网元通信。OAM系统也可以直接与其他NF网元通信，本申请实施例不做限定。
图2中的各网元既可以是硬件设备中的网络元件，也可以是在专用硬件上运行的软件功能，或者是平台(例如，云平台)上实例化的虚拟化功能。
需要说明的是，在上述图2所示的网络架构中，仅仅是示例性说明整个网络架构中所包括的网元。在本申请实施例中，并不限定网络架构中所包括的网元，比如，在本申请实施例中，网络架构中可包括上述图2所示所有网元中的任一个网元或任多个网元。
其中，终端设备是一种具有无线通信功能的电子设备，可以部署在陆地上，包括室内或室外、手持或车载；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)。终端设备可以是用户设备(user equipment，UE)、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、智慧家庭(smart home)中的无线终端设备等。
AN节点可以是向UE提供无线接入的设备，包括但不限于演进型Node B(evolved node B，简称eNB)、无线保真访问接入点(wireless-fidelity access point，简称WiFi AP)、全球微波互联接入基地站(worldwide interoperability for microwave access base station，简称WiMAX BS)、5G网络中的基站(例如，gNodeB，gNB)等。AN节点还可以为(radio access network，RAN)节点或者后续演进网络中的接入节点。
UPF网元可以对报文进行处理，例如：UPF可以执行用户数据转发、路由、数据统计、限速、统计上报等功能。
AMF网元可以进行移动网络中的移动性管理，如用户位置更新、用户注册网络、用户切换等。AMF网元可以通过N1接口接入UE的非接入层(non-access stratum，NAS)信令(包括会话管理(session management，SM)信令)，还可以通过N2接口接入RAN的信令，完成用户的注册流程和SM信令的转发以及移动性管理。AMF网元可以转发SMF网元与UE之间的消息。
SMF网元可以对移动网络中的会话进行管理，如会话建立、会话修改、会话释放等。
PCF网元可以管理用户策略，包括移动性相关策略、协议数据单元(Protocol Data Unit，PDU)会话相关策略，如服务质量(quality of service，QoS)策略、计费策略等。
NSSF网元用于选择网络切片(network slice)。网络切片是一个用于支持特定网络能力与网络特性的逻辑隔离的网络，可以端到端(end to end，E2E)的包括整个网络，也可以部分网络功能在多个网络切片中共享，是满足3GPP提出的第五代5G移动通信技术关于网络差异化需求的关键技术。通常，不同网络切片的网络特征并不相同，且要求网络切片之间相互隔离，互不影响。如增强实现(augmented reality，AR)或虚拟实现(virtual reality，VR)业务的网络切片要求大带宽、低时延；物联网(internet of things，IOT)业务的网络切片要求 支持海量终端接入，但带宽小，对时延没要求。
UDM网元负责管理用户的签约数据等信息，UDM网元可以向AMF、SMF等网元提供用户的签约数据。
UDR网元存储网络中结构化的数据，包括用户签约数据信息和用户策略。UDM可以从UDR读取终端签约数据，PCF可以从UDR读取用户策略信息。UDR也可以分成两个部分分别于UDM和PCF网元合并，而不独立部署。
NRF网元存储其他功能网元的注册信息，并根据这些注册信息提供网络功能网元之间互相查找发现的服务。
NEF网元负责网络对外开放服务和能力的授权和控制，位于运营商网络之外的AF网元可以通过NEF网元向网络提供网络数据，也可以通过NEF获得网络的对外开放的服务和数据。
DN用于向UE提供数据服务，可以为用户的PDU会话的访问目的地。DN可以是PDN网络，如因特网(internet)、IP多媒体业务(IP multi-media Service，IMS)等。
AF网元可以发送请求以影响SMF路由策略、以及负责在本地DN中选择和重新定位应用程序。AF主要对转发面行为进行动态策略/计费控制。这些业务需要动态策略和计费控制。AF传送PCF需要的动态会话信息，
在本申请的实施例中，第一PLMN和第二PLMN可以均采用图2所示的架构。当然第一PLMN和第二PLMN也可以采用其他网络架构，例如：演进分组核心网(Evolved Packet Core network,EPC)架构或者未来演进的系统架构，在此不做限定。
请参阅图3，图3是本申请实施例提供的一种漫游方法的示意图。该漫游方法包括：
301、终端设备获取第一PLMN的信息。
在本申请的实施例中，第一PLMN与第二PLMN之间具有动态漫游协议。在一种可能的实现方式中，第一PLMN与第二PLMN之间具有动态漫游协议，包括：若终端设备能够接入第二PLMN，第一PLMN与第二PLMN之间的漫游协议去激活；若终端设备无法接入第二PLMN，第一PLMN与第二PLMN之间的漫游协议激活。例如，第一PLMN可以是终端设备的VPLMN，第二PLMN可以是终端设备的HPLMN。
若终端设备能够接入第二PLMN，第一PLMN与第二PLMN之间的漫游协议去激活可以是指第一PLMN与第二PLMN之间没有漫游协议，或者，第一PLMN与第二PLMN之间的漫游协议不可用。
若终端设备无法接入第二PLMN，第一PLMN与第二PLMN之间的漫游协议激活是指第一PLMN与第二PLMN之间存在漫游协议，或者，第一PLMN与第二PLMN之间的漫游协议可用。
可以理解为：第一PLMN与第二PLMN之间具有临时的漫游协议，当终端设备能够接入第二PLMN时，该临时的漫游协议失效，当终端设备无法接入第二PLMN时，该临时的漫游协议生效。
在另一种可能的实现方式中，第一PLMN与第二PLMN之间具有动态漫游协议，包括：若满足第一条件，该第一PLMN与第二PLMN之间的漫游协议有效。该第一条件可以是第二PLMN发生故障，或者，终端设备无法接入第二PLMN。
在本申请的实施例中，动态漫游协议也可以称为临时漫游协议，本申请并不做限定。
在本申请的实施例中，终端设备可以获取多个第一PLMN的信息，例如：第一PLMN列表信息，该第一PLMN列表内包含多个第一PLMN信息。
在本申请的实施例中，终端设备可以采用如下两种方式获取第一PLMN的信息。
方式一
在终端设备注册到第二PLMN的过程中，终端设备接收来自第二PLMN中的核心网网元的第一PLMN的信息。
在一种可能的实现方式中，该核心网网元是接入管理网元，当第一PLMN和第二PLMN采用5G网络架构时，接入管理网元可以是AMF网元；当第一PLMN和第二PLMN采用4G网络架构时，接入管理网元可以是移动性管理实体(mobility management entity，MME)。在本申请的实施例中，以接入管理网元为AMF网元进行举例说明。
在一种可能的实现方式中，当终端设备选择该第二PLMN并向AMF网元发送注册请求消息后，AMF网元从UDM网元获取该终端设备的签约数据，该签约数据包括第一PLMN的信息。当终端设备成功注册到该第二PLMN后，AMF向终端设备发送注册接受消息。该注册接受消息包括第一PLMN的信息。在另一种可能的实现方式中，AMF网元还可以从第二PLMN中的其他网元，例如：PCF网元或者OAM网元，获取第一PLMN的信息。
在一种可能的实现方式中，第一PLMN的信息包括第一PLMN的标识信息，例如：第一PLMN的标识identity(ID)。第一PLMN的信息还可以包括如下信息中的至少一种：允许终端设备接入第一PLMN的接入技术类型、允许终端设备接入第一PLMN的区域信息、终端设备接入述第一PLMN的条件、第一PLMN的优先级信息。其中，第一PLMN的优先级信息可以理解为，当终端设备依次尝试接入多个PLMN时，在这些多个PLMN中，终端设备接入第一PLMN的优先级或者终端设备接入第一PLMN的顺序。第一PLMN的优先级信息也可以称为第一PLMN在终端设备选网列表中的优先级，在此不做限定。
在一种可能的实现方式中，允许终端设备接入第一PLMN的接入技术类型包括第三代合作计划(3rd Generation Partnership Project,3GPP)接入技术，和/或，非3GPP(Non-3GPP)接入技术。
在一种可能的实现方式中，允许终端设备接入第一PLMN的区域信息可以包括跟踪区(Tracking Area,TA)标识。示例的，区域信息可以是在第二PLMN发生故障的区域内，第一PLMN中允许终端设备接入第一PLMN的区域信息。可以理解为，第一PLMN中允许终端设备接入第一PLMN的区域与第二PLMN发生故障的区域存在重叠区域，这样位于第二PLMN发生故障区域的终端设备可以在无需移动的前提下，该终端设备允许接入第一PLMN，提升终端设备的业务体验。
在一种可能的实现方式中，终端设备接入述第一PLMN的条件可以包括：终端设备接收到第一PLMN发送的用于指示第一PLMN与第二PLMN之间的动态漫游协议被激活的指示信息(条件一)，和/或，对于每个优先级高于第一PLMN的PLMN，终端设备均无法接入(条件二)。
在一种可能的实现方式中，第一PLMN的优先级信息包括第一PLMN的优先级低于如下任意一个PLMN的优先级：第二PLMN的优先级、第二PLMN的PLMN(Equivalent PLMN,EPLMN)的优先级、用户控制的PLMN的优先级、运营商控制的PLMN的优先级。当终端设备尝试接入PLMN时，终端设备的选网顺序为：(1)第二PLMN、(2)第二PLMN 的等效PLMN、(3)用户控制的PLMN、(4)运营商控制的PLMN、(5)第一PLMN。即，当终端设备依次尝试接入(1)第二PLMN、(2)第二PLMN的等效PLMN、(3)用户控制的PLMN、(4)运营商控制的PLMN，但是均无法成功接入时，终端设备可以尝试接入第一PLMN。
在一种可能的实现方式中，第一PLMN的优先级信息包括第一PLMN的优先级高于用户按照服务质量要求选择的PLMN的优先级，或者所述第一PLMN的优先级低于运营商控制的PLMN的优先级并且高于用户按照服务质量要求选择的PLMN的优先级。当终端设备无法接入运营商控制的PLMN时，终端设备可以尝试接入第一PLMN。如果无法接入第一PLMN，那么终端设备可以尝试接入户按照服务质量要求选择的PLMN。
方式二
在终端设备尝试接入第一PLMN的过程中，终端设备接收来自第一PLMN中的核心网网元的第一PLMN的信息。该核心网网元具体参见方式一中的描述。具体的，终端设备向第一PLMN中的AMF网元发送注册请求。AMF网元判断该第一PLMN与第二PLMN是否签署了动态漫游协议。若第一PLMN与第二PLMN没有签署动态漫游协议，或者，虽然一PLMN与第二PLMN签署了动态漫游协议，但是该动态漫游协议没有激活，AMF网元拒绝终端设备接入第一PLMN。AMF网元向终端设备发送注册拒绝消息。注册拒绝消息包括第一PLMN与第二PLMN之间的动态漫游协议未激活的指示信息。注册拒绝消息还可以包括第一PLMN的信息。第一PLMN的信息具体参见方式一中的描述。
302、终端设备存储第一PLMN的信息。
在一种可能的实现方式中，终端设备可以将第一PLMN的信息存储到所述终端设备的PLMN选择列表中。终端设备的PLMN选择列表也可以称为终端设备的PLMN选网列表，或者，终端设备接入PLMN的优先级列表。位于该列表中的PLMN具备不同的优先级顺序，终端设备按照从高到低的优先级依次接入对应的PLMN网络。当然，终端设备也可以将第一PLMN的信息存储到终端设备的其他内容中，本申请实施例不做限定。
在一种可能的实现方式中，终端设备的PLMN选择列表如表1所示：
表1
PLMN优先级 PLMN列表
1 HPLMN或者EHPLM
2 用户控制的PLMN
3 运营商控制的PLMN
4 动态漫游PLMN
5 按照服务质量要求选择的PLMN
6 其他PLMN
在表1中，PLMN的选网优先级按照从1到6的顺序来表示从高到低的顺序，位于顺序“1”的PLMN对应的选网优先级最高，位于顺序“6”的PLMN对应的的选网优先级最低。例如：HPLMN或者EHPLMN的优先级最高。用户控制的PLMN具有第二等级的优先级。进一步的，表1还可以包括该用户控制的PLMN对应的接入技术类型。运营商控制的PLMN具有第三等级的优先级。进一步的，表1还可以包括该运营商控制的PLMN对应的接入技术类型。动态漫游PLMN即指上述的第一PLMN。动态漫游PLMN具有第 四等级的优先级。当终端设备获取到第一PLMN的信息后，将该第一PLMN的信息储存到动态漫游PLMN中。按照服务质量要求选择的PLMN具有第五等级的优先级。按照服务质量要求选择的PLMN是指终端设备根据各PLMN的信号质量和/或接入技术类型选择满足质量要求的PLMN。
需要说明的是，第一PLMN的信息(即表1中的动态漫游PLMN)只有在UE获取第一PLMN的信息之后才会添加到表1中，可以理解为，表1中的动态漫游PLMN是终端设备根据接收到的动态漫游PLMN信息动态生成的。在UE获取第一PLMN的信息之前，终端设备的PLMN选择列表不包括第一PLMN的信息，即表1中不包含第一PLMN的信息，那么终端设备在选网过程中也不会考虑第一PLMN的信息。
在一种可能的方式中，上述表1中的内容可以存储到终端设备的用户识别模块(Subscriber Identity Module,SIM)中。
在一种可能的实现方式中，若终端设备采用自动选网的方式接入PLMN，则终端设备可以按照表1中的PLMN的优先级依次选择对应的PLMN接入。
303、若终端设备无法接入第二PLMN，终端设备根据第一PLMN的信息向第一PLMN发送接入请求。
在一种可能的实现方式中，若第二PLMN发生故障导致终端设备无法接入第二PLMN，则第二PLMN会与第一PLMN签署动态漫游协议，或者，第二PLMN与第一PLMN之间的动态漫游协议被激活。终端设备可以尝试接入第一PLMN。
在一种可能的实现方式中，该接入请求可以是注册请求。
在一种可能的实现方式中，若第一PLMN的信息包括允许终端设备接入第一PLMN的接入技术类型，则终端设备采用该类型的接入技术接入第一PLMN。
在本申请的实施例中，终端设备可以采用如下两种方式向第一PLMN发送接入请求。
方式一
终端设备按照表1中各PLMN的优先级依次接入对应的PLMN。若对于每个优先级高于第一PLMN的PLMN，终端设备均无法接入，则终端设备向第一PLMN发送接入请求。具体的，对于HPLMN或者EHPLM、用户控制的PLMN以及运营商控制的PLMN，若终端设备均无法接入，终端设备向动态漫游PLMN发送接入请求。
在一种可能的实现方式中，若有多个动态漫游PLMN，则多个动态漫游PLMN之间也可以设置优先级，终端设备可以按照各动态漫游PLMN的优先级选择对应的动态漫游PLMN接入。在另一种可能的实现方式中，若有多个动态漫游PLMN，终端设备可以按照各动态漫游PLMN在表1中的位置顺序或者随机选择对应的动态漫游PLMN接入。
方式二
在第二PLMN与第一PLMN签署动态漫游协议，或者第二PLMN与第一PLMN之间的动态漫游协议被激活后，第一PLMN向终端设备发送通知消息，该通知消息用于通知终端设备第一PLMN与所述第二PLMN之间的动态漫游协议被激活。在一种可能的实现方式中，该通知消息可以包括第一PLMN的信息。终端设备根据该通知消息向第一PLMN发送接入请求。
在一种可能的实现方式中，该通知消息可以是第一PLMN中的接入网设备发送的广播消息。
在本申请的实施例中，若终端设备无法接入第一PLMN，该终端设备不将该第一PLMN加入禁止(forbidden)接入的PLMN的列表。若第一PLMN包含多个PLMN，终端设备可以选择第一PLMN中的其他PLMN并尝试接入。这样可以避免终端设备在自动选网模式下无法选择到该第一PLMN。
在本申请的实施例中，终端设备获取第一PLMN的信息，其中，第一PLMN与第二PLMN之间具有动态漫游协议。若第二PLMN发送故障而导致终端设备无法接入第二PLMN，终端设备根据第一PLMN的信息向第一PLMN发送接入请求，从而可以减少终端设备业务等待时间，提升用户的业务体验。
下面以第一PLMN为VPLMN，第二PLMN为HPLMN，终端设备为UE为例，详细说明本申请实施例的漫游方法。
在图4所示的实施例中，有两个VPLMN，分别为VPLMN1和VPLMN2，其中，VPLMN1包括接入网设备(例如：RAN1)和接入管理网元(例如：AMF1)，VPLMN2包括接入网设备(例如：RAN2)和(例如：AMF2)。当然，VPLMN1和VPLMN2也可以包括其他网元，在此不做限定。在本实施例中，UE根据来自VPLMN的注册拒绝消息获取动态漫游PLMN列表。具体的，该方法包括：
401、UE进行PLMN选择。
在一种可能的实现方式中，UE在自动选网模式下进行PLMN选择，UE可以按照HPLMN或者EHPLM、用户控制的PLMN以及运营商控制的PLMN的优先级顺序，依次选择对应的PLMN接入。对于HPLMN或者EHPLM、用户控制的PLMN以及运营商控制的PLMN，若UE均无法接入，但是当前网络中VPLMN1可以接入，则UE选择VPLMN1接入。以上选网顺序为仅为举例说明，本申请不做限制，UE还可以按照其他选网顺序选择接入VPLMN1，例如：UE可以直接选择VPLMN1接入。
402、UE通过VPLMN1中的RAN1向AMF1发送注册请求(registration request)消息。
在一种可能的实现方式中，该注册请求消息包括如下信息中的至少一种：注册类型、UE的永久标识(例如：签约永久标识(Subscription Permanent Identifier,SUPI)、UE的临时标识、安全参数、请求的网络切片选择辅助信息(Network Slice Selection Assistance Information,NSSAI)、UE的5G核心网能力等等。
403、AMF1经RAN1向UE发送注册拒绝(registration reject)消息。
在一种可能的实现方式中，AMF1确定UE的HPLMN与VPLMN1签署了动态漫游协议，但是该动态漫游协议尚未激活，则AMF1拒绝UE接入VPLMN1。AMF1向UE发送注册拒绝消息。注册拒绝消息包括拒绝的原因信息，例如：该原因信息可以是VPLMN1与HPLMN之间的动态漫游协议未激活。进一步的，注册拒绝消息还可以包括VPLMN1的信息。VPLMN1的信息具体参见301中第一PLMN的信息的描述。
404、UE将VPLMN1的信息加入到动态漫游PLMN列表中。
在一种可能的实现方式中，UE在收到注册拒绝的消息后，根据该注册拒绝消息中的原因信息确定VPLMN1与HPLMN之间的动态漫游协议未激活。UE将VPLMN1的信息添加到PLMN选择列表中的动态漫游PLMN项。其中，VPLMN1的优先级低于运营商控制的PLMN的优先级并且高于用户按照服务质量要求选择的PLMN的优先级。
405、UE通过VPLMN2中的RAN2向AMF2发送注册请求消息。
由于UE无法接入VPLMN1，UE选择VPLMN2并尝试接入。
UE向AMF2发送注册请求消息的方式具体参见402的描述。
406、AMF2经RAN2向UE发送注册拒绝消息。
该注册拒绝消息与步骤403中的注册拒绝消息类似，具体参见403的描述。
407、UE将VPLMN2的信息加入到动态漫游PLMN列表中。
在本申请的实施例中，动态漫游PLMN列表可以是表1中，具有第四优先级的动态漫游PLMN的列表。
具体的，UE在收到注册拒绝的消息后，根据该注册拒绝消息中的原因信息确定VPLMN2与HPLMN之间的动态漫游协议未激活。UE将VPLMN2的信息添加到UE本地存储的PLMN选择列表。其中，VPLMN2的优先级低于运营商控制的PLMN的优先级并且高于用户按照服务质量要求选择的PLMN的优先级。
在一种可能的实现方式中，若VPLMN1和VPLMN2相互之间没有优先级，则将VPLMN1和VPLMN2的信息按照接收顺序存储在动态漫游PLMN列表中，如表2所示。若VPLMN1和VPLMN2相互之间有优先级，则按照优先级顺序将VPLMN1和VPLMN2的信息按照存储在动态漫游PLMN列表中。
表2
Figure PCTCN2019129816-appb-000001
在本申请的实施例中，虽然UE在VPLMN1和VPLMN2注册失败，但是UE不会将VPLMN1和VPLMN2加入禁止接入的PLMN的列表(forbidden PLMN list)。这是因为，一旦UE将VPLMN1和VPLMN2加入到禁止接入的PLMN的列表，则UE后续将不会尝试接入VPLMN1和VPLMN2。
通过上述401～407，UE实现了PLMN选择列表的更新。
408、HPLMN与VPLMN2之间的动态漫游协议被激活。
若某一时刻，该HPLMN发生故障，导致UE无法正常接入HPLMN。此时，HPLMN与VPLMN2之间的动态漫游协议被激活。
在一种可能的实现方式中，HPLMN与VPLMN2之间的动态漫游协议可以由HPLMN发起激活。例如，当HPLMN发生故障，HPLMN的OAM系统可以向VPLMN2的OAM系统发送指示消息，用于指示激活HPLMN与VPLMN2之间的动态漫游协议。
在另一种可能的实现方式中，HPLMN与VPLMN2之间的动态漫游协议可以由VPLMN2发起激活。例如当VPLMN2获知HPLMN发生故障，VPLMN2的OAM系统决定激活HPLMN与VPLMN2之间的动态漫游协议。
409、VPLMN2中的RAN2向UE发送通知消息。
具体的，RAN2在允许动态漫游的区域向UE发送广播消息。其中，允许动态漫游的区域指的是允许UE接入VPLMN2的区域，该区域可以用TA标识。例如：表2中的TA-3, TA-4。RAN2位于允许UE接入VPLMN2的区域内，可以理解为，RAN2属于TA-3或者TA-4。在一种可能的实现方式中，如果允许UE接入VPLMN2的区域内包含多个RAN，则多个RAN同时向UE发送广播消息。该广播消息包括HPLMN与VPLMN2之间的动态漫游协议被激活的指示信息。该广播消息还可以包括VPLMN2的信息。VPLMN2的信息具体参见301中第一PLMN的信息的描述。
410、UE通过VPLMN2中的RAN2向AMF2发送注册请求消息。
UE接收到广播消息后，UE尝试接入动态漫游PLMN列表中的VPLMN2。
具体地，如果UE存储的VPLMN2的信息还包括UE接入的接入技术类型，那么UE选择对应的接入技术类型(如表2中的Non-3GPP接入)并接入VPLMN2。如果UE存储的VPLMN2的信息还包括UE接入的区域信息，那么UE接入VPLMN2之后，为了保证业务的正常进行，UE还可以选择不移出该区域范围内。
在该过程中，如果VPLMN2入网失败，UE不会将该VPLMN2放入禁止接入的PLMN的列表。UE可以继续尝试接入动态漫游的PLMN列表中的其他PLMN，例如VPLMN1。
在一种可能的实现方式中、UE成功注册到VPLMN2后。UE可以周期性尝试接入更高优先级的PLMN网络，例如HPLMN，这样UE可以再次回归到HPLMN网络，从动态漫游的网络中切换到归属网络，即实现动态漫游的去激活。
在图5所示的实施例中，有一个VPLMN2。VPLMN2包括接入网设备(例如：RAN2)和接入管理网元(例如：AMF2)。HPLMN包括UDM网元和接入管理网元(例如：AMF3)，VPLMN2和HPLMN也可以包括其他网元，在此不做限定。在本实施例中，UE通过向HPLMN的注册过程获取动态漫游PLMN列表。具体的，该方法包括：
501、UE进行PLMN选择。
UE选择HPLMN进行接入
502、UE向HPLMN中的AMF3发送注册请求消息。
UE向HPLMN中的AMF3发送注册请求消息的方法与402中发送注册请求消息的方法类似，具体参见402的描述。
503、AMF3从UDM网元获取该UE的签约数据(subscription data)。
在一种可能的实现方式中，该签约数据包括一个或者多个动态漫游的PLMN的信息，例如：VPLMN2的信息。动态漫游的PLMN的信息或者VPLMN2的信息具体参见301中第一PLMN的信息的描述或者407中表2的描述。
504、UE完成注册流程中的其他步骤，从而成功注册到HPLMN。
505、AMF3向UE发送注册接受消息。
该注册接受消息包括动态漫游的PLMN的信息，例如：VPLMN2的信息。具体参见301中第一PLMN的信息的描述或者407中表2的描述。
在一种可能的实现方式中，该注册接受消息还可以包括指示信息，该指示信息用于指示若UE接入动态漫游的PLMN失败，UE不要将该接入失败的动态漫游PLMN加入到禁止接入的PLMN的列表。
UE接收到注册接受消息后，将接收到动态漫游的PLMN的信息存储到自身动态漫游PLMN列表中。具体参见407的描述。
通过上述501～505，UE实现了PLMN选择列表的更新。
当UE正常接入HPLMN后，若该HPLMN发生故障，导致UE无法接入HPLMN。此时，HPLMN与VPLMN2之间的动态漫游协议被激活。具体参见408的描述。
506、VPLMN2中的RAN2向UE发送通知消息。
具体参见409的描述。
507、UE选择VPLMN2。
在一种可能的实现方式中，UE根据506中的通知消息选择VPLMN2进行接入。例如：根据通知消息中包括的VPLMN2的标识信息选择接入VPLMN2。
在另一种可能的实现方式中，VPLMN2也可以不向UE发送通知消息。UE根据PLMN选择列表(例如：表1)中PLMN的优先级依次选择对应的PLMN接入。对于优先级高于VPLMN2的PLMN，UE均无法接入，则UE选择接入VPLMN2。
508、UE通过VPLMN2中的RAN2向AMF2发送注册请求消息。
具体参见410的描述。
在图4和图5实施例中，相同或者相似的内容可以具体参见图3实施例的描述。
图6是本申请实施例中的一种通信装置的示意图。具体的，包括处理单元601、接收单元602、发送单元603。该通信装置还可以包括存储单元604。处理单元601、接收单元602、发送单元603以及存储单元604可以是在物理上相互分离的单元，也可以是集成到一个或者多个物理单元中，在此不做限定。
接收单元602和发送单元603用于实现处理单元601与其他单元或者网元的内容交互。具体的，发送单元603可以是发送电路或者发送器。接收单元602可以是接收电路或者接收器。发送单元603和接收单元602还可以是该通信装置的收发信机。发送单元603和接收单元602还可以是处理单元601的通信接口或者收发电路。可选的，发送单元603和接收单元602可以是一个收发芯片。
虽然图6中仅仅示出了一个发送单元603和一个接收单元602，该通信装置也可以包括多个发送单元603和多个接收单元602。发送单元603和接收单元602还可以是一个或者多个收发单元的子单元。
处理单元601用于实现通信装置对数据的处理。处理单元601可以是处理电路，也可以是处理器。其中，处理器可以是中央处理器(central processing unit，CPU)，网络处理器(network processor，NP)或者CPU和NP的组合。处理器还可以进一步包括硬件芯片。上述硬件芯片可以是专用集成电路(application-specific integrated circuit，ASIC)，可编程逻辑器件(programmable logic device，PLD)或其组合。上述PLD可以是复杂可编程逻辑器件(complex programmable logic device,CPLD)，现场可编程逻辑门阵列(field-programmable gate array，FPGA)，通用阵列逻辑(Generic Array Logic，GAL)或其任意组合。
虽然图6中仅仅示出了一个处理单元601，通信装置也可以包括多个处理单元或者处理单元601包括多个子数据处理单元。具体的，处理器可以是一个单核(single-CPU)处理器，也可以是一个多核(multi-CPU)处理器。
存储单元604用于存储处理单元601执行的计算机指令。存储单元604可以是存储电路也可以是存储器。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。
存储单元604可以是独立于处理单元601的单元，也可以是处理单元601中的存储单元，在此不做限定。虽然图6中仅仅示出了一个存储单元，通信装置也可以包括多个存储单元或者存储单元包括多个子存储单元。
在本申请的各实施例中，处理单元601可以通过发送单元603和接收单元602与其他网元进行内容交互，例如：处理单元601获取或者接收来自其他网元的内容。
一种可能的实现方式中，处理单元601、发送单元603、接收单元602以及存储单元604可以通过总线相互连接。总线可以是外设部件互连标准(peripheral component interconnect，PCI)总线或扩展工业标准结构(extended industry standard architecture，EISA)总线等。所述总线可以分为地址总线、数据总线、控制总线等。
该通信装置可以是图3-图5实施例中的终端设备。具体的，处理单元601用于获取第一PLMN的信息，其中，所述第一PLMN与第二PLMN之间具有动态漫游协议，还用于确定所述通信装置无法接入所述第二PLMN；发送单元603，用于根据所述第一PLMN的信息向所述第一PLMN发送接入请求。
一种可能的实现方式中，接收单元602用于在所述通信装置注册到所述第二PLMN的过程中，接收来自所述第二PLMN中的核心网网元的所述第一PLMN的信息。所述处理单元601用于通过所述接收单元602获取所述第一PLMN的信息。
一种可能的实现方式中，所述发送单元603还用于向所述第一PLMN中的核心网网元发送注册请求；所述接收单元602用于接收来自所述核心网网元的注册拒绝消息；所述处理单元601用于根据所述注册拒绝消息获取所述第一PLMN的信息。
一种可能的实现方式中，所述注册拒绝消息包括所述第一PLMN的信息，和/或，所述注册拒绝消息包括所述第一PLMN与所述第二PLMN之间的动态漫游协议未激活的指示信息。
一种可能的实现方式中，所述处理单元601还用于在所述发送单元603发送所述接入请求前，确定对于每个优先级高于所述第一PLMN的PLMN，所述通信装置均无法接入。
一种可能的实现方式中，所述接收单元602用于接收来自所述第一PLMN的通知消息，所述通知消息用于通知所述通信装置所述第一PLMN与所述第二PLMN之间的动态漫游协议激活，所述通知消息包括所述第一PLMN的信息；所述发送单元603用于根据根据所述通知消息向所述第一PLMN发送接入请求。
一种可能的实现方式中，所述处理单元601还用于确定所述通信装置无法接入所述第一PLMN，并不将所述第一PLMN加入禁止接入的PLMN的列表。
一种可能的实现方式中，所述第一PLMN与所述第二PLMN具有相同的移动国家码，所述第一PLMN的移动网络码与所述第二PLMN的移动网络码不同。
一种可能的实现方式中，所述第一PLMN与所述第二PLMN之间具有动态漫游协议，包括：若所述通信装置能够接入所述第二PLMN，所述第一PLMN与所述第二PLMN之间的漫游协议去激活；若所述通信装置无法接入所述第二PLMN，所述第一PLMN与所述第二PLMN之间的漫游协议激活。
一种可能的实现方式中，所述第一PLMN的信息包括如下信息中的至少一种：所述第一PLMN的标识信息、允许所述通信装置接入所述第一PLMN的接入技术类型、允许所述通信装置接入所述第一PLMN的区域信息、所述通信装置接入所述第一PLMN的条件、所述第一PLMN的优先级信息。
一种可能的实现方式中，所述第一PLMN的优先级信息包括所述第一PLMN的优先级低于如下任意一个PLMN的优先级：所述第二PLMN的优先级、所述第二PLMN的等效PLMN的优先级、用户控制的PLMN的优先级、运营商控制的PLMN的优先级；或者，
所述第一PLMN的优先级信息包括：所述第一PLMN的优先级高于用户按照服务质量要求选择的PLMN的优先级，或者，所述第一PLMN的优先级低于运营商控制的PLMN的优先级并且高于用户按照服务质量要求选择的PLMN的优先级。
一种可能的实现方式中，所述通信装置接入所述第一PLMN的条件包括：所述接收单元602接收到所述第一PLMN发送的用于指示所述第一PLMN与所述第二PLMN之间的动态漫游被激活的指示信息，和/或，对于每个优先级高于所述第一PLMN的PLMN，所述通信装置均无法接入。
一种可能的实现方式中，所述存储单元604用于将所述第一PLMN的信息存储到PLMN选择列表中。
在本申请的实施例中，所述第一PLMN可以为VPLMN，所述第二PLMN为HPLMN。
在本申请的实施例中，接收单元602用于执行图3-图5实施例中终端设备的信号接收操作。发送单元603用于执行图3-图5实施例中终端设备的信号发送操作。处理单元601用于执行图3-图5实施例中终端设备的信号处理操作。具体参见图3-图5实施例中的描述。
在一种可能的实现方式中，处理单元601根据存储单元604中存储的计算机指令，使得该通信装置执行图3-图5实施例中终端设备的操作。
该通信装置还可以是图4或者图5中的接入管理网元，例如AM1，AMF2或者AMF3。对应的，接收单元602用于执行图4或者图5实施例中AMF网元的信号接收操作。发送单元603用于执行图4或者图5实施例中AMF网元的信号发送操作。处理单元601用于执行图4或者图5实施例中AMF网元的信号处理操作。具体参见图4或图5实施例中的描述。
在一种可能的实现方式中，处理单元601根据存储单元604中存储的计算机指令，使得该通信装置执行执行图4或者图5实施例中AMF网元的操作。
图7是本申请实施例中的另一种通信装置的示意图。具体的，该通信装置包括至少一个处理器701，收发器702、存储器703。至少一个处理器701，收发器702、存储器703通过通信线路704连接。
处理器701可以是一个CPU，微处理器，ASIC，或一个或多个用于控制本申请方案程序执行的集成电路。
其中，存储器703用于存储执行本申请方案的计算机执行指令，并由处理器701来控制执行。处理器701用于执行存储器703中存储的计算机执行指令，从而实现本申请上述图3-图5实施例中终端设备或者AMF网元的操作。
本申请实施例中的计算机执行指令也可以称之为应用程序代码，本申请实施例对此不作具体限定。
在具体实现中，作为一种实施例，处理器701可以包括一个或多个CPU，例如图7中的CPU0和CPU1。
在具体实现中，作为一种实施例，处理器701可以是一个单核(single-CPU)处理器，也可以是一个多核(multi-CPU)处理器。
图8是本申请实施例提供的芯片或者芯片系统的结构示意图。芯片或者芯片系统包括一个或两个以上(包括两个)处理器801和通信接口802。
该芯片或者芯片系统还可以包括存储器803，存储器803可以包括只读存储器和随机存取存储器，并向处理器801提供操作指令和数据。
在一些实施方式中，存储器803存储了如下的元素，执行模块或者数据结构，或者他们的子集，或者他们的扩展集。
在本申请实施例中，通过调用存储器803存储的操作指令(该操作指令可存储在操作系统中)，控制上述图3-图5实施例中终端设备或者AMF网元的执行相应的操作。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机程序或指令。在计算机上加载和执行所述计算机程序或指令时，全部或部分地执行本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、网络设备、用户设备或者其它可编程装置。所述计算机程序或指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机程序或指令可以从一个网站站点、计算机、服务器或数据中心通过有线或无线方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是集成一个或多个可用介质的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，例如，软盘、硬盘、磁带；也可以是光介质，例如，数字视频光盘(digital video disc，DVD)；还可以是半导体介质，例如，固态硬盘(solid state drive，SSD)。
尽管在此结合各实施例对本申请进行了描述，然而，在实施所要求保护的本申请过程中，本领域技术人员通过查看附图、公开内容、以及所附权利要求书，可理解并实现公开实施例的其他变化。在权利要求中，“包括”(comprising)一词不排除其他组成部分或步骤，“一”或“一个”不排除多个的情况。单个处理器或其他单元可以实现权利要求中列举的若干项功能。相互不同的从属权利要求中记载了某些措施，但这并不表示这些措施不能组合起来产生良好的效果。

Claims (30)

  1. 一种漫游方法，其特征在于，包括：
    终端设备获取第一公用陆地移动网PLMN的信息，其中，所述第一PLMN与第二PLMN之间具有动态漫游协议；
    若所述终端设备无法接入所述第二PLMN，所述终端设备根据所述第一PLMN的信息向所述第一PLMN发送接入请求。
  2. 根据权利要求1所述的方法，其特征在于，所述终端设备获取所述第一PLMN的信息，包括：
    在所述终端设备注册到所述第二PLMN的过程中，所述终端设备接收来自所述第二PLMN中的核心网网元的所述第一PLMN的信息。
  3. 根据权利要求1所述的方法，其特征在于，所述终端设备获取所述第一PLMN的信息，包括：
    所述终端设备向所述第一PLMN中的核心网网元发送注册请求；
    所述终端设备接收来自所述核心网网元的注册拒绝消息；
    所述终端设备根据所述注册拒绝消息获取所述第一PLMN的信息。
  4. 根据权利要求3所述的方法，其特征在于，
    所述注册拒绝消息包括所述第一PLMN的信息，和/或，
    所述注册拒绝消息包括所述第一PLMN与所述第二PLMN之间的动态漫游协议未激活的指示信息。
  5. 根据权利要求1-4中任意一项所述的方法，其特征在于，所述终端设备根据所述第一PLMN的信息向所述第一PLMN发送接入请求，包括：
    若对于每个优先级高于所述第一PLMN的PLMN，所述终端设备均无法接入，所述终端设备向所述第一PLMN发送接入请求。
  6. 根据权利要求1-4中任意一项所述的方法，其特征在于，所述方法还包括：
    所述终端设备接收来自所述第一PLMN的通知消息，所述通知消息用于通知所述终端设备所述第一PLMN与所述第二PLMN之间的动态漫游协议激活，所述通知消息包括所述第一PLMN的信息；
    所述终端设备根据所述第一PLMN的信息向所述第一PLMN发送接入请求，包括：
    所述终端设备根据所述通知消息向所述第一PLMN发送接入请求。
  7. 根据权利要求1-6中任意一项所述的方法，其特征在于，所述方法还包括：
    若所述终端设备无法接入所述第一PLMN，所述终端设备不将所述第一PLMN加入禁止接入的PLMN的列表。
  8. 根据权利要求1-7中任意一项所述的方法，其特征在于，所述第一PLMN与所述第二PLMN具有相同的移动国家码，所述第一PLMN的移动网络码与所述第二PLMN的移动网络码不同。
  9. 根据权利要求1-8中任意一项所述的方法，其特征在于，所述第一PLMN与所述第二PLMN之间具有动态漫游协议，包括：若所述终端设备能够接入所述第二PLMN，所述第一PLMN与所述第二PLMN之间的漫游协议去激活；若所述终端设备无法接入所述 第二PLMN，所述第一PLMN与所述第二PLMN之间的漫游协议激活。
  10. 根据权利要求1-9中任意一项所述的方法，其特征在于，所述第一PLMN的信息包括所述第一PLMN的标识信息。
  11. 根据权利要求10所述的方法，其特征在于，所述第一PLMN的信息还包括如下信息中的至少一种：允许所述终端设备接入所述第一PLMN的接入技术类型、允许所述终端设备接入所述第一PLMN的区域信息、所述终端设备接入所述第一PLMN的条件、所述第一PLMN的优先级信息。
  12. 根据权利要求11所述的方法，其特征在于，所述第一PLMN的优先级信息包括所述第一PLMN的优先级低于如下任意一个PLMN的优先级：所述第二PLMN的优先级、所述第二PLMN的等效PLMN的优先级、用户控制的PLMN的优先级、运营商控制的PLMN的优先级。
  13. 根据权利要求11所述的方法，其特征在于，所述第一PLMN的优先级信息包括：所述第一PLMN的优先级高于用户按照服务质量要求选择的PLMN的优先级，或者，所述第一PLMN的优先级低于运营商控制的PLMN的优先级并且高于用户按照服务质量要求选择的PLMN的优先级。
  14. 根据权利要求11所述的方法，其特征在于，所述终端设备接入所述第一PLMN的条件包括：所述终端设备接收到所述第一PLMN发送的用于指示所述第一PLMN与所述第二PLMN之间的动态漫游被激活的指示信息，和/或，
    对于每个优先级高于所述第一PLMN的PLMN，所述终端设备均无法接入。
  15. 根据权利要求1-14中任意一项所述的方法，其特征在于，所述终端设备将所述第一PLMN的信息存储到所述终端设备的PLMN选择列表中。
  16. 根据权利要求1-15中任意一项所述的方法，其特征在于，所述第一PLMN为拜访公用陆地移动网VPLMN，所述第二PLMN为归属公用陆地移动网HPLMN。
  17. 一种通信装置，其特征在于，包括：
    处理单元，用于获取第一公用陆地移动网PLMN的信息，其中，所述第一PLMN与第二PLMN之间具有动态漫游协议，还用于确定所述通信装置无法接入所述第二PLMN；
    发送单元，用于根据所述第一PLMN的信息向所述第一PLMN发送接入请求。
  18. 根据权利要求17所述的装置，其特征在于，还包括接收单元，用于在所述通信装置注册到所述第二PLMN的过程中，接收来自所述第二PLMN中的核心网网元的所述第一PLMN的信息，所述处理单元用于通过所述接收单元获取所述第一PLMN的信息。
  19. 根据权利要求17所述的装置，其特征在于，还包括接收单元，
    所述发送单元还用于向所述第一PLMN中的核心网网元发送注册请求；
    所述接收单元用于接收来自所述核心网网元的注册拒绝消息；
    所述处理单元用于根据所述注册拒绝消息获取所述第一PLMN的信息。
  20. 根据权利要求19所述的装置，其特征在于，所述注册拒绝消息包括所述第一PLMN的信息，和/或，
    所述注册拒绝消息包括所述第一PLMN与所述第二PLMN之间的动态漫游协议未激活的指示信息。
  21. 根据权利要求17-20中任意一项所述的装置，其特征在于，
    所述处理单元还用于在所述发送单元发送所述接入请求前，确定对于每个优先级高于所述第一PLMN的PLMN，所述通信装置均无法接入。
  22. 根据权利要求17-20中任意一项所述的装置，其特征在于，
    所述接收单元用于接收来自所述第一PLMN的通知消息，所述通知消息用于通知所述通信装置所述第一PLMN与所述第二PLMN之间的动态漫游协议激活，所述通知消息包括所述第一PLMN的信息；
    所述发送单元用于根据根据所述通知消息向所述第一PLMN发送接入请求。
  23. 根据权利要求17-22中任意一项所述的装置，其特征在于，
    所述处理单元还用于确定所述通信装置无法接入所述第一PLMN，并不将所述第一PLMN加入禁止接入的PLMN的列表。
  24. 根据权利要求17-23中任意一项所述的装置，其特征在于，所述第一PLMN与所述第二PLMN具有相同的移动国家码，所述第一PLMN的移动网络码与所述第二PLMN的移动网络码不同。
  25. 根据权利要求17-24中任意一项所述的装置，其特征在于，所述第一PLMN与所述第二PLMN之间具有动态漫游协议，包括：若所述通信装置能够接入所述第二PLMN，所述第一PLMN与所述第二PLMN之间的漫游协议去激活；若所述通信装置无法接入所述第二PLMN，所述第一PLMN与所述第二PLMN之间的漫游协议激活。
  26. 根据权利要求17-25中任意一项所述的装置，其特征在于，所述第一PLMN的信息包括如下信息中的至少一种：所述第一PLMN的标识信息、允许所述通信装置接入所述第一PLMN的接入技术类型、允许所述通信装置接入所述第一PLMN的区域信息、所述通信装置接入所述第一PLMN的条件、所述第一PLMN的优先级信息。
  27. 根据权利要求26所述的装置，其特征在于，所述第一PLMN的优先级信息包括所述第一PLMN的优先级低于如下任意一个PLMN的优先级：所述第二PLMN的优先级、所述第二PLMN的等效PLMN的优先级、用户控制的PLMN的优先级、运营商控制的PLMN的优先级；或者，
    所述第一PLMN的优先级信息包括：所述第一PLMN的优先级高于用户按照服务质量要求选择的PLMN的优先级，或者，所述第一PLMN的优先级低于运营商控制的PLMN的优先级并且高于用户按照服务质量要求选择的PLMN的优先级。
  28. 根据权利要求26所述的装置，其特征在于，所述通信装置接入所述第一PLMN的条件包括：所述接收单元接收到所述第一PLMN发送的用于指示所述第一PLMN与所述第二PLMN之间的动态漫游被激活的指示信息，和/或，
    对于每个优先级高于所述第一PLMN的PLMN，所述通信装置均无法接入。
  29. 一种计算机可读存储介质，其特征在于，所述可读存储介质中存储有计算机可读指令，当所述指令被执行时，实现如权利要求1～16任一项所述的方法。
  30. 一种通信装置，其特征在于，包括：处理器，其中，所述处理器用于运行存储器中存储的指令以执行如权利要求1～16任一项所述的方法。
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