WO2022012310A1 - 一种通信方法及装置 - Google Patents

一种通信方法及装置 Download PDF

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Publication number
WO2022012310A1
WO2022012310A1 PCT/CN2021/102646 CN2021102646W WO2022012310A1 WO 2022012310 A1 WO2022012310 A1 WO 2022012310A1 CN 2021102646 W CN2021102646 W CN 2021102646W WO 2022012310 A1 WO2022012310 A1 WO 2022012310A1
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WIPO (PCT)
Prior art keywords
information
ees
ecs
network
request information
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Application number
PCT/CN2021/102646
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English (en)
French (fr)
Inventor
葛翠丽
杨艳梅
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.)
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Publication date
Priority claimed from CN202010670931.8A external-priority patent/CN113938910B/zh
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP21842630.2A priority Critical patent/EP4167625A4/en
Publication of WO2022012310A1 publication Critical patent/WO2022012310A1/zh
Priority to US18/154,327 priority patent/US20230171618A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06—Authentication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular, to a communication method and apparatus.
  • Multi-access edge computing can use the wireless access network to provide telecom users with information technology (IT) services and cloud computing functions nearby, thereby creating a high-performance,
  • IT information technology
  • cloud computing functions nearby, thereby creating a high-performance.
  • the low-latency and high-bandwidth carrier-class service environment accelerates the rapid download of various contents, services and applications in the network, allowing users to enjoy uninterrupted high-quality network experience.
  • Roaming may occur due to the movement of the terminal equipment, for example, the terminal equipment moves from Beijing to Shanghai. Then, the terminal device needs to switch from the home public land mobile network (PLMN) network in Beijing to the visited PLMN network in Shanghai.
  • PLMN home public land mobile network
  • EES edge enabler server
  • Embodiments of the present application provide a communication method and apparatus, so that a terminal device can obtain EES information corresponding to a visited PLMN network.
  • a communication method is provided, and the execution body of the method is a first ECS.
  • the first ECS may be the first ECS, or may be a component (for example, a chip, circuit or other, etc.)
  • the method includes: the first ECS receives the PLMN identity of the second network from the first device, the first ECS sends first request information to the second ECS according to the PLMN identity, the first request information is used to request the information of the second EES corresponding to the second network; the first ECS receives the information of the second EES from the second ECS; wherein the first device is a terminal device or the first EES, and the home network of the terminal device is a first network, the first ECS and the first EES respectively correspond to the first network, the second network is a service network of the terminal device, the second ECS and the second EES respectively correspond to the first network second network.
  • the first ECS can interact with the second ECS instead of the first device, and learn the information of the V-EES corresponding to the second network, which simplifies the signaling logic for the first device to discover the EES corresponding to the second network in the roaming scenario .
  • the first device does not need to perceive the information of the second ECS by itself, so that when the first device roams to multiple networks, the first device perceives the information of the second ECS of the multiple networks, resulting in
  • the requirements for the terminal device are high, the edge service access authorization and authentication of the first device is complex, difficult to control, and the implementation logic is complex.
  • the first ECS receives one or more items of location information of the terminal device in the second network and application information of the terminal device from the first device .
  • the first request information includes one or more items of location information of the terminal device in the second network and application information of the terminal device.
  • the information of the second EES includes address information of the second EES or identification information of the second EES that matches the first request information
  • the method further includes: the first ECS The information of the second EES is sent to the first device.
  • the second ECS may determine whether there is information of the V-EES matching the first request information. If it exists, the information of the V-EES is directly sent to the first device. After that, the first device may directly initiate an EAS initiation process. In this way, the operation of the first device can be simplified.
  • it further includes: the first ECS receives a security credential for accessing the second EES from the second ECS; the first ECS sends the first device the security credentials Security credentials for the second EES.
  • the first device accesses the second EES through the security credential of the second EES, which can improve the security of accessing the second EES and avoid the information leakage of the second EES caused by the fake first device accessing the second EES. .
  • the information of the second EES is used to indicate that there is a second EES that matches the first request information
  • the method further includes: the first ECS sends the first device the information of the second EES. information about the second ECS.
  • the second ECS after receiving the first request information, the second ECS can determine whether there is a second EES matching the second request information. If there is a second EES that matches the second request information, the information of the second ECS is returned to the first ECS, and the first ECS feeds back the information of the second ECS to the first device. On the other hand, the first device can request the information of the second EES from the first ECS by itself, so that the leakage of the topology end of the V-EES can be avoided.
  • the method further includes: the first ECS receives a security credential for accessing the second ECS from the second ECS; the first ECS sends the first device the security credentials The security credentials of the second ECS.
  • the first device accesses the second ECS through the security credential, which can protect the information security of the second ECS.
  • the information of the second EES is used to indicate that there is no second EES matching the first request information
  • the method further includes: the first ECS sends the first ECS to the terminal device A piece of information, where the first information is obtained from the second ECS or configured locally, and the first information is used for obtaining an access point of an application.
  • the first ECS can also return the first information to the first device, and the first information can be the central cloud platform or the central cloud platform DNS server information .
  • the central cloud platform or the central cloud platform server provides services for the first device to ensure that the first device can also be provided with corresponding services in the absence of a matching second EES.
  • a communication method where the execution body of the method is a first device.
  • the first device may be a terminal device or a first EES
  • the terminal device may be a terminal device or configured in the terminal device.
  • the first EES may be the first EES, or a component configured in the first EES, etc.
  • the method includes: the first device sends the second edge configuration server ECS to the first edge configuration server ECS.
  • the public land mobile network PLMN identity of the network is used for confirmation of the information of the second ECS;
  • the first device receives the information of the second edge-enabled server EES; wherein, the first device includes a terminal device or The first EES, the home network of the terminal device is the first network, the first EES and the first ECS respectively correspond to the first network, the second network is the service network of the terminal device, and the The second ECS and the second EES respectively correspond to the second network.
  • the terminal device when the terminal device roams and switches from the first network to the second network, the terminal device can successfully obtain the information of the second EES corresponding to the second network.
  • the method further includes: the first device sends one or more of the following information to the first ECS: location information of the terminal device in the second network, the Application information of the terminal device.
  • the information of the second EES includes address information of the second EES that matches the first request information; the first device receives the information of the second EES, including: the first The device receives address information of the second EES from the first ECS, or identification information of the second EES, and the like.
  • the method further includes: the first device receives a security credential for accessing the second EES from the first ECS.
  • the information of the second EES is used to indicate that there is a second EES that matches the first request information; the first device receives the information of the second EES, including: the first device receiving the information of the second ECS from the first ECS, the first device sends second request information to the second ECS, the second request information is used to request the information of the second EES; and The terminal device receives the information of the second EES from the second ECS, where the information of the second EES includes address information of the second EES or identification information of the second EES that matches the first request information.
  • the method further includes: receiving, by the first device, a security credential for accessing the second ECS from the first ECS.
  • the information of the second EES is used to indicate that there is no second EES matching the first request information
  • the method further includes: the first device receives data from the first ECS The first information is used to obtain the access point of the application.
  • the first device is a first EES
  • the method further includes: receiving, by the first EES, third request information from the terminal device, where the third request information includes the the PLMN identifier of the second network.
  • a communication method is provided, and the execution body of the method is a second ECS.
  • the second ECS may be the second ECS, or may be a component (for example, a chip, circuit or other, etc.)
  • the method includes: the second ECS receives first request information from the first ECS, where the first request information is used to request information of the second edge-enabled server EES corresponding to the second network; The second ECS sends the information of the second EES to the first ECS; wherein the second ECS and the second EES respectively correspond to the second network, and the first ECS corresponds to the first network , the first network is the home network of the terminal device, and the second network is the service network of the terminal device.
  • the first request information includes one or more items of location information of the terminal device in the second network and application information of the terminal device.
  • the information of the second EES includes address information of the second EES or identification information of the second EES that matches the first request information.
  • the method further includes: sending, by the second ECS, a security credential for accessing the second EES to the first ECS.
  • the information of the second EES is used to indicate whether there is a second EES matching the first request information.
  • the method further includes: sending, by the second ECS, a security credential for accessing the second ECS to the first ECS.
  • the information of the second EES indicates that there is no second EES matching the first request information
  • the method further includes: the second ECS sends the first ECS to the first ECS information, where the first information is used to obtain the access point of the application.
  • an embodiment of the present application provides a device, and for beneficial effects, reference may be made to the description of the above-mentioned first aspect.
  • the device has the function of implementing the behavior in the method embodiment of the first aspect.
  • the functions can be implemented by executing corresponding hardware or software.
  • the hardware or software may include one or more units corresponding to the above functions.
  • the apparatus may include: a communication unit for receiving a public land mobile network PLMN identity of a second network from a first device, the first device including a terminal device or a first edge-enabled server EES; a processing unit, configured to send first request information to the second ECS according to the PLMN identifier, where the first request information is used to request information of the second EES corresponding to the second network; a communication unit, is further configured to receive the information of the second EES from the second ECS; wherein, the home network of the terminal device is the first network, and the first ECS and the first EES respectively correspond to the first network, the second network is a service network of the terminal device, and the second ECS and the second EES respectively correspond to the second network.
  • These units may perform the corresponding functions in the method examples of the first aspect. For details, refer to the detailed descriptions in the method examples, which will not be repeated here.
  • an embodiment of the present application further provides a device, and for beneficial effects, reference may be made to the description of the second aspect.
  • the apparatus has the function of implementing the behavior in the method embodiment of the second aspect.
  • the functions can be implemented by executing corresponding hardware or software.
  • the hardware or software may include one or more units corresponding to the above functions.
  • the apparatus includes: a communication unit configured to send a public land mobile network PLMN identity of the second network to the first edge configuration server ECS, where the PLMN identity is used for confirmation of information of the second ECS;
  • the communication unit is further configured to receive information of the second edge-enabled server EES; wherein the first device includes a terminal device or a first EES, the home network of the terminal device is the first network, the first EES, The first ECS respectively corresponds to the first network, the second network is a service network of the terminal device, and the second ECS and the second EES respectively correspond to the second network.
  • These units may perform the corresponding functions in the method examples of the second aspect. For details, please refer to the detailed descriptions in the method examples, which will not be repeated here.
  • an embodiment of the present application further provides a device, and the beneficial effects can be found in the description of the third aspect.
  • the apparatus has the function of implementing the behavior in the method embodiment of the third aspect.
  • the functions can be implemented by executing corresponding hardware or software.
  • the hardware or software may include one or more units corresponding to the above functions.
  • the apparatus includes: a communication unit, configured to receive first request information from a first ECS, where the first request information is used to request a second edge-enabled server corresponding to the second network The information of the EES; the communication unit is further configured to send the information of the second EES to the first ECS; wherein the second ECS and the second EES respectively correspond to the second network, and the first ECS Corresponding to the first network, the first network is the home network of the terminal device, and the second network is the service network of the terminal device.
  • These units may perform the corresponding functions in the method example of the third aspect, for details, please refer to the detailed description in the method example, which will not be repeated here.
  • a seventh aspect provides an apparatus, and the apparatus may be the first ECS in the method embodiments of the first aspect, or a chip provided in the first ECS.
  • the apparatus includes a communication interface, a processor, and optionally, a memory.
  • the memory is used to store computer programs or instructions
  • the processor is coupled with the memory and the communication interface, and when the processor executes the computer program or instructions, the apparatus is executed by the first ECS in the method embodiment of the first aspect.
  • an apparatus may be the first device in the method embodiments of the second aspect, or a chip provided in the first device.
  • the apparatus includes a communication interface, a processor, and optionally, a memory.
  • the memory is used to store computer programs or instructions, and the processor is coupled to the memory and the communication interface, and when the processor executes the computer program or instructions, the apparatus is executed by the first device in the method embodiment of the second aspect.
  • an apparatus in a ninth aspect, is provided, and the apparatus may be the second ECS in the method embodiments of the third aspect, or a chip provided in the second ECS.
  • the apparatus includes a communication interface, a processor, and optionally, a memory.
  • the memory is used to store computer programs or instructions
  • the processor is coupled to the memory and the communication interface, and when the processor executes the computer program or instructions, the device is executed by the second ECS in the method embodiment of the third aspect.
  • a computer program product comprising: computer program code, which, when the computer program code is executed, causes the method performed by the first ECS in the above-mentioned first aspect to be performed.
  • a computer program product comprising: computer program code, when the computer program code is executed, the method performed by the first device in the above-mentioned second aspect is performed.
  • a twelfth aspect provides a computer program product, the computer program product comprising: computer program code, which when executed, causes the method performed by the second ECS in the third aspect to be performed.
  • the present application provides a chip system, where the chip system includes a processor for implementing the function of the first ECS in the method of the first aspect above.
  • the chip system further includes a memory for storing program instructions and/or data.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the present application provides a chip system, where the chip system includes a processor for implementing the function of the first device in the method of the second aspect.
  • the chip system further includes a memory for storing program instructions and/or data.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the present application provides a chip system, where the chip system includes a processor for implementing the function of the second ECS in the method of the third aspect.
  • the chip system further includes a memory for storing program instructions and/or data.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the present application provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and when the computer program is executed, implements the method performed by the first ECS in the first aspect.
  • the present application provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed, the method performed by the first device in the second aspect is implemented.
  • the present application provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed, the method performed by the second ECS in the third aspect is implemented.
  • FIG. 1 is an architecture of an MEC network provided by an embodiment of the present application
  • FIG. 2 is an architecture of a wireless network provided by an embodiment of the present application
  • FIG. 3 is a schematic diagram of a PLMN network and an EDN network provided by an embodiment of the present application;
  • FIG. 5 is a flowchart of a communication method provided by Embodiment 2 of the present application.
  • FIG. 6 is a flowchart of a communication method provided by Embodiment 3 of the present application.
  • FIG. 7 is a flowchart of a communication method provided by Embodiment 4 of the present application.
  • FIG. 8 is a schematic structural diagram of an apparatus provided by an embodiment of the present application.
  • FIG. 9 is another schematic structural diagram of an apparatus provided by an embodiment of the present application.
  • At least one item(s) below or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s).
  • at least one item (a) of a, b, or c may represent: a, b, c, ab, ac, bc, or abc, where a, b, and c may be single or multiple .
  • words such as “first” and “second” are used to distinguish the same or similar items with basically the same function and effect. Those skilled in the art can understand that the words “first”, “second” and the like do not limit the quantity and execution order, and the words “first”, “second” and the like are not necessarily different.
  • the network architecture and service scenarios described in the embodiments of the present application are for the purpose of illustrating the technical solutions of the embodiments of the present application more clearly, and do not constitute limitations on the technical solutions provided by the embodiments of the present application.
  • the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.
  • Edge data network an understanding is that EDN only corresponds to one data network, and is a special local data network (local, data network, DN), including edge enabling functions, which can use data network connection.
  • the input identifier (DN accEES identifier, DNAI) and the data network name (DNN) identifier are the logical concepts of the network.
  • EDN is the peer-to-peer concept of central cloud, which can be understood as a local data center (geographical location concept), which can be identified by DNAI and can contain multiple local data networks (local DN). Taking the "App Market” application in Huawei's mobile phone as an example, a central cloud of "App Market” can be set up at the Shenzhen headquarters.
  • Beijing and Shanghai can respectively set up a local EDN network of "application market”. Subsequently, users in Beijing can obtain application services through the local EDN network of the "App Market” set up in Beijing. On the other hand, users in Shanghai can obtain application services through the local EDN network of the "application market” set up in Shanghai.
  • Each EDN network provides application services for each user nearby, which can provide users with a higher-quality network experience.
  • An application instance or edge application an application deployed in the EDN is called an application instance. Specifically, it refers to a server application, such as social media software, augmented reality (AR), virtual reality (virtual reality, VR) deployed in the EDN instance (instance).
  • An application can deploy one or more edge application servers (EAS) in one or more EDNs. EAS deployed and running in different EDNs can be considered as different EASs of an application, and they can share a domain name. One anycast IP address may be used, or different IP addresses may be used, which is not limited.
  • EAS is also called application instance, edge application instance, MEC application server, EAS function, etc.
  • the edge application client is the peer entity of EAS on the terminal device side. EAC is used for application users to obtain application services from EAS. EAC is a client program applied on the terminal side. The EAC can connect to the EAS on the central cloud to obtain application services, or connect to the EAS deployed and run in one or more EDNs to obtain service applications.
  • the edge enabler server can provide enabling capabilities for instances deployed in EDN, and can better support the deployment of applications in MEC.
  • EES can support registration of edge applications, authentication and authentication of terminal devices, and provide IP address information of application instances for terminal devices. Further, the EES can also support obtaining the identification and IP address information of the application instance, and sending the identification and IP address information of the application instance to the ECS.
  • EES is deployed in EDN.
  • an EAS is registered with an EES, or the information of an EAS is configured on an EES through a management system, the EES is called the EES associated with the EAS, and the EES can control, manage, register or configure the EES associated with the EES.
  • the edge enabler client is the peer entity of the EES on the terminal device side.
  • EEC is used to register EEC information and application client information with EES, perform security authentication and authentication, obtain EAS IP address from EES, and provide edge computing enabling capabilities to application clients, such as EAS discovery service, EAS IP address The address is returned to the application client.
  • the edge configuration server is responsible for EDN configuration, such as providing EES information to terminal devices.
  • the information of the application instance can also be provided to the terminal device, and the information of the application instance can be obtained by interacting with the DNS of the application. Further, information such as application instances and IP addresses can also be obtained and saved from other functional entities.
  • the application user may sign a service agreement with the application provider, thereby providing services for the application user, and the application user communicates with the EAS through the application client by logging in to the application client on the terminal device.
  • the enabling client eg, EEC
  • EEC may be a middleware layer, generally located in the operating system, or located between the application client and the operating system, and may also be implemented inside the application client.
  • the application client can obtain the edge-enabled service from the enabling client in the form of an application programming interface (application program interface, API).
  • the network architecture defined in the 3GPP standard TS 23.501 is as follows, including: a radio access network (radio accEES network, RAN) and a core network.
  • a radio access network radio accEES network, RAN
  • RAN radio access network
  • Different access network devices can be connected through the Xn interface, and the access network device and the core network can be connected through the NG interface.
  • the RAN is used to implement functions related to wireless access.
  • the RAN can provide functions such as wireless resource management, quality of service management, data encryption and compression for terminal equipment.
  • the access network equipment may include the following types:
  • the next generation nodeB provides terminal equipment with protocols and functions of the new radio (new radio, NR) control plane and/or user plane, and accesses the core network.
  • new radio new radio
  • NR new radio
  • 5G core network 5th generation core, 5GC
  • ng-eNB Next generation evolved Node B
  • E-UTRA evolved universal terrestrial radio accEES
  • the access network equipment may be composed of a centralized unit (central unit, CU) and a distributed unit (distributed unit, DU), the functions of the original access network equipment can be split, and the original access network equipment can be split. Some functions of the device are placed in the CU, and the rest of the functions are deployed in the DU. Multiple DUs share one CU, which saves costs and facilitates network expansion.
  • the CU and DU can be connected through the FI interface.
  • the CU can be connected to the core network on behalf of the access network device through the NG interface, and the CU can also be connected to other access network devices on behalf of the access network device through the Xn interface.
  • the functions of CU can also be divided into:
  • CU-CP Central unit-control plane: mainly includes the RRC layer in the CU and the control plane in the PDCP layer;
  • CU-UP Central unit-user plane: mainly includes the SDAP layer in the CU and the user plane in the PDCP layer.
  • the core network is mainly used to manage the terminal equipment and provide the function of communicating with the external network.
  • Core network equipment may include one or more of the following network elements:
  • UPF network element mainly responsible for forwarding and receiving user data.
  • the UPF network element can receive user data from the data network (DN) and transmit it to the terminal equipment through the access network equipment; in the uplink transmission, the UPF network element can receive the user data from the terminal equipment through the access network equipment User data, forward the user data to the DN.
  • the transmission resources and scheduling functions in the UPF network element that provide services for the terminal equipment may be managed and controlled by the SMF network element.
  • Access and mobility management function (accEES and mobility management function, AMF) network element: mainly responsible for the mobility management in the mobile network, such as user location update, user registration network, user switching, etc.
  • Session management function mainly responsible for session management in the mobile network, such as session establishment, modification, release. Specific functions include assigning IP addresses to users and selecting UPF network elements that provide packet forwarding functions.
  • PCF Policy control function
  • Application function (AF) network element mainly supports interaction with the 3GPP core network to provide services, such as influencing data routing decisions, policy control functions, or providing some third-party services to the network side.
  • Unified data management (UDM) network element It is mainly used for generating authentication credential, user identification processing (such as storing and managing user permanent identity, etc.), access authorization control and contract data management, etc.
  • the network elements in the above-mentioned core network may have different names.
  • the fifth-generation mobile communication system is used as an example for description, which is not intended to limit the present application.
  • the network architecture shown in FIG. 1 may further include: a terminal device.
  • Terminal equipment which can be referred to as terminal for short, is a device with wireless transceiver functions. Terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; it can also be deployed on water (such as ships, etc.); In the air (eg on airplanes, balloons and satellites, etc.).
  • the terminal device may be a mobile phone, a tablet computer, a computer with a wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, and a wireless terminal in industrial control (industrial control).
  • VR virtual reality
  • AR augmented reality
  • the terminal device may also be a cellular phone, a cordless phone, a session initiation protocol (sEESion initiation protocol, SIP) phone, a wireless local loop (wirelEES local loop, WLL) station, a personal digital assistant (PDA), a wireless communication functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in future fifth generation (5G) networks or future evolved public land mobile communication networks ( Terminal equipment in public land mobile network, PLMN), etc.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • Terminal equipment may also sometimes be referred to as user equipment (UE), access terminal equipment, in-vehicle terminal equipment, industrial control terminal equipment, UE unit, UE station, mobile station, mobile station, remote station, remote terminal equipment, mobile equipment, wireless communication equipment, UE proxy or UE device, etc.
  • Terminal devices can also be stationary or mobile. This embodiment of the present application does not limit this.
  • the network architecture shown in FIG. 1 may further include: a data network (DN).
  • a DN may be a network that provides data transmission services to users.
  • the DN may be an IP multi-media service network or an internetwork.
  • Multiple application servers can be included in the DN.
  • the terminal device may establish a protocol data unit (protocol data unit, PDU) session from the terminal device to the DN to access the DN.
  • PDU protocol data unit
  • a data network may have one or more local data networks (local data network, Local DN), and these local data networks are data network access points (accEES points) close to the user attachment point (point of attachment).
  • the ECS, EES, and EAS in the architecture shown in the foregoing FIG. 1 may be configured in the foregoing one or more DNs.
  • the above DN includes one or more EDNs, and each EDN includes EES and EAS, and may also include ECS.
  • the above DN may also be configured with an application center cloud platform.
  • the application center cloud platform and the above EAS can be considered as equivalent concepts.
  • Each EAS can provide application services to users nearby, and the application center cloud platform can provide application services to all users.
  • the application center cloud platform can also be called the central cloud platform. In the following description, the central cloud platform is used as an example for description.
  • a central cloud platform about “Huawei Music” can be set up at the Shenzhen headquarters, and the central cloud platform can serve as the "Huawei Music” for global users.
  • the client provides the service.
  • Huawei Music's EAS can be deployed on the EDN networks in Beijing and Shanghai respectively.
  • users in Beijing can access the EAS of Huawei Music in the EDN network corresponding to Beijing to obtain Huawei Music services.
  • Users in Shanghai can access the EAS of Huawei Music in the corresponding EDN network in Shanghai to obtain Huawei Music services.
  • one EDN network corresponds to one PLMN network
  • different PLMN networks may correspond to one or more EDN networks.
  • PLMN network A corresponds to EDN1
  • PLMN network B corresponds to EDN2.
  • the EDN1 includes the first EAS and the first EES, and may also include the first ECS.
  • the EDN2 includes a second EAS and a second EES, and may also include a second ECS.
  • the first network may be the home network of the terminal device, which may be referred to as the H network for short
  • the second network may be the terminal device.
  • the visited (Visted) network may be referred to as the V network for short, or may be referred to as the service network.
  • the terminal device may roam from the first network to the second network.
  • the first ECS corresponds to the first network, and can also be described as: the first ECS is deployed in the first network, or the first ECS is an ECS associated with the first network, or the first ECS is an operator to which the first network belongs ECS et al.
  • the first EES corresponds to the first network, and can also be described as: the first EES is deployed at the edge of the first network, or the first EES may belong to the first network operator, or the first EES is an operator of the first network Contracted EES.
  • the first EAS corresponds to the first network, and can also be described as: the first EAS is deployed at the edge of the first network.
  • the second ECS corresponds to the second network, and can also be described as: the second ECS is deployed in the second network, or the second ECS is an ECS associated with the second network, or the second ECS is an ECS of an operator to which the second network belongs Wait.
  • the second EES corresponds to the second network, and can also be described as: the second EES is deployed at the edge of the second network, or the second EES may belong to the second network operator, or the second EES is operated with the second network EES contracted by the business.
  • the second EAS corresponds to the second network, and can also be described as: the second EAS is deployed at the edge of the second network, and so on.
  • the information of the second ECS may include address information of the second ECS, or identification information of the second ECS.
  • the information of the second ECS, the address information of the second ECS, and the identification information of the second ECS are not distinguished and can be replaced with each other.
  • the information of the second EES may include identification information of the second EES, or address information of the second EES.
  • the embodiment of the present application provides a communication method, which can solve the above-mentioned technical problem of how to determine the EES in the EDN network corresponding to the second network when the terminal device roams and is switched from the first network to the second network.
  • the method includes: The first ECS receives the PLMN identity of the second network from the first device, and the first device may be a terminal device or a first EES or the like.
  • the first ECS sends first request information to the second ECS according to the PLMN identifier of the second network, where the first request information is used to request information of the second EES corresponding to the second network.
  • the second ECS After receiving the first request information, the second ECS sends the information of the second EES to the first ECS.
  • the method further includes: the first ECS determines the information of the second ECS according to the PLMN identifier of the second network. After that, the first ECS sends the above-mentioned first request information to the second ECS according to the information of the second ECS.
  • the method further includes: the second ECS determines the information of the second EES according to the first request information.
  • the second ECS determines address information of the second EES or identification information of the second EES according to the first request information; or, the second ECS determines whether there is a second EES matching the first request information according to the first request information.
  • the second ECS determines the information of the second EES according to the first request information, which may include any of the following situations:
  • the second ECS retrieves EES information corresponding to the second network according to the application information in the first request information.
  • the information of the EES corresponding to the second network includes the information of the application (that is, the application is registered in the EES corresponding to the second network, or the application is onboard or instantiated in the EES corresponding to the second network)
  • the second ECS determines that there is a second EES that matches the first request information.
  • the second ECS retrieves the information of the EES corresponding to the second network according to the location information in the first request information.
  • the second ECS determines that there is a second EES matching the first request information.
  • the service area or the best service area of the EES may be a group of cell identifiers or tracking area identifiers or a group of DNAI lists corresponding to a service area (service area).
  • the above matching can be understood as: the location information is located in the service area of the EES corresponding to the second network or an area that overlaps with it.
  • the second ECS retrieves the information of the EES corresponding to the second network according to the location information and the application information in the first request information.
  • the second ECS determines that there is a second EES matching the first request information.
  • the first request information includes one or more items of location information of the terminal device in the second network and application information of the terminal device.
  • the location information of the terminal device in the second network includes the cell ID or tracking area information (tracking area information, TAI) of the terminal device in the second network, etc.
  • the application information of the terminal device represents the application information from the UE.
  • the application information may be applications installed on the UE, applications that the UE is starting to run, applications that the UE is about to access, applications that the UE is interested in, and the like.
  • the application information of the UE includes the identification of the application or the identification of the application client.
  • the identification of the application is used to uniquely identify an application, such as fully qualified domain name (FQDN), EAS ID, uniform resource locator (uniform resource locator). locator, URL), etc.
  • the identifier of the client is used to identify the client of an application on the UE, such as the package name of the application client (package name), the operating system identifier and the application identifier (OSId and APPId), and the application information of the UE is also It can include application provider, application type (application category or application type), such as IoV application, application description, application characteristics, geographic area of operation where the application runs ), the latency corresponding to the application (latency), the bandwidth corresponding to the application (bandwidth), and the service continuity requirement (service continuity requirement) corresponding to the application.
  • the applied information can also be triples, DNNs, or a combination of DNNs and slice information.
  • the first device may determine the information of the second ECS corresponding to the second network by itself, and then request the second ECS for a suitable information on the second EES.
  • the first device moves and roams to multiple regions, it needs to perceive the address information of the ECSs corresponding to the networks in the multiple regions, and interact with multiple ECSs for authentication and authorization.
  • the requirements are relatively high, and the edge service access authorization and authentication of the first device is complex, difficult to control, and complicated to implement logic.
  • the first ECS corresponding to the first network can obtain the information of the second EES by interacting with the second ECS corresponding to the second network. information, and send the information of the second EES to the first device.
  • the first device does not need to perceive the information of the second ECS by itself, which can solve problems such as high requirements for the first device, complicated edge service access authorization and authentication of the first device, difficult to control, and complex implementation logic.
  • the first ECS may send the information of the second EES to the first device.
  • the above-mentioned information of the second EES may include address information of the second EES or identification information of the second EES. If the second ECS determines that there is a second EES matching the first request information, it may return the address information of the second EES or the identification information of the second EES to the first ECS.
  • the first ECS sends the address information of the second EES or the identification information of the second EES to the first device.
  • the above-mentioned information of the second EES may be used to indicate whether there is indication information of a second EES that matches the first request information, and the above-mentioned information used to indicate whether there is a second EES that matches the first request information
  • the information of the second EES is returned to the first ECS.
  • the first ECS returns the information of the second ECS to the first device.
  • the first device requests information of the second EES from the second ECS.
  • the first ECS returns the first information to the first device, and the first information can be used to obtain the access point of the application.
  • the above-mentioned first information may be the information of the central cloud platform, or the information of the DNS server of the central cloud platform, or the like.
  • the foregoing first information may be preconfigured by the first ECS, or acquired by the first ECS from the second ECS.
  • the first embodiment and the second embodiment are described by taking the first device as a terminal device as an example.
  • the difference between the first embodiment and the second embodiment is that in the first embodiment, the second ECS returns the address of the second EES matching the first request information to the first ECS after the second EES matching the first request information exists. information or identification information of the second EES.
  • the second ECS returns to the first ECS information indicating whether there is a second EES matching the first request information. And if there is a second EES matching the first request information, the first ECS returns the information of the second ECS to the terminal device.
  • the terminal device requests the second ECS for the information of the second EES according to the information of the second ECS, so that the leakage of the topology structure of the EES can be avoided.
  • the third embodiment and the fourth embodiment take the first device as the first EES as an example.
  • the difference between Embodiment 3 and Embodiment 4 is similar to the difference between Embodiment 1 and Embodiment 2 above, and will not be described one by one.
  • the first ECS may receive the PLMN identifier of the second network from the terminal device, and the second network may be a PLMN network.
  • the first ECS may determine the information of the second ECS according to the PLMN identifier of the second network. After that, the first ECS sends the first request information to the second ECS.
  • the second ECS can determine whether there is a second EES matching the first request information; if so, send the address information of the second EES or the identification information of the second EES to the first ECS ECS, the first ECS then sends the address information of the second EES or the identification information of the second EES to the terminal device.
  • the second ECS may send the first information to the first ECS, the first information may be used for the acquisition of the access point of the application.
  • the above-mentioned first information may be the information of the central cloud platform, or the DNS server information of the central cloud platform.
  • the second ECS may not return any information, etc., which is not limited.
  • the first ECS sends the first information to the terminal device.
  • the first information may be obtained from the second ECS, and when the second ECS does not return the first information, the first information may be local matching of the first ECS, etc. limited.
  • the terminal device is the UE
  • the first network is the home network (H network for short)
  • the second network is the visited network (referred to as the H network).
  • V network the first ECS and the first EAS are respectively H-ECS and H-EAS
  • the second ECS, the second EES and the second EAS are respectively V-ECS, V-EES and V-EAS as an example to describe, including but not limited to:
  • step 500 the UE accesses the V network.
  • Step 501 the UE sends first request information to the H-ECS, where the above-mentioned first request information is used to request the information of the EES.
  • the first request information may be sent by configuring a provision request message.
  • the above-mentioned first request information may include at least one of the following: the PLMN ID of the V network; the location of the UE in the V network, and the application information of the UE.
  • the H-ECS determines the information of the V-ECS according to the PLMN ID of the V network.
  • the information of the V-ECS may be pre-configured in the H-ECS, or deduced by the H-ECS according to the PLMN ID.
  • the information of the V-ECS may be address information of the V-ECS or identification information of the V-ECS.
  • the H-ECS can be configured with a mapping table between the PLMN ID and ECS information, then the H-ECS finds the ECS information corresponding to the PLMN of the V network in the mapping table according to the PLMN ID of the V network, that is, the V network. - Information on ECS.
  • the H-ECS can deduce the information of the V-ECS based on the PLMN ID. For example, using a certain deduction formula, you can get ECS information by entering the PLMN ID.
  • Step 503a the H-ECS sends the second request information to the V-ECS, which is used to request the information of the V-EES corresponding to the second network.
  • the above-mentioned second request information can be sent through a configuration request provision request, or an EES request EES request, or an EES available request EES Availability request and other messages.
  • the above-mentioned second request information may include one or more items of application information, location information, and the like.
  • the H-ECS can aggregate the request information of multiple UEs
  • the application information in the UE is sent to the V-ECS, and the location information of the UE in the request information of the aggregated multiple UEs is sent to the V-ECS. Therefore, the application information in the second request information may include application information of one or more UEs, and the location information in the second request information may include the location information of the one or more UEs, which is not limited.
  • Step 503b the V-ECS sends the V-EES information, or the first information, to the H-ECS.
  • the information of the V-EES or the first information may be sent through the first response message.
  • the first information may be the information of the central cloud platform, or the information of the DNS service of the cloud platform.
  • the above-mentioned first response information may be a configuration response provision response, or an EES response to an EES response, or an EES available response to a message such as an EES Availability response, which is not limited.
  • the information of the V-EES may include address information of the V-EES or identification information of the V-EES, or the information of the V-EES may be used to indicate whether there is indication information of a V-EES matching the first request information.
  • the cloud platform information or cloud platform DNS server information can be used by the UE to obtain access point (endpoint) information of the application to be accessed by the UE, for example, provide the IP address of the application server deployed on the cloud.
  • the above-mentioned cloud platform DNS server may be considered as a centralized DNS server or the like.
  • the V-ECS may determine whether there is a V-EES matching the second request information according to the second request information in the foregoing step 503a. If there is a V-EES matching the second request information, the above-mentioned first response information may include information of the V-EES matching the second request information.
  • the information of the above V-EES may be an EES configuration profile, or a tailored EES configuration profile, which may include address information of the V-EES or identification information of the V-EES, such as the address of the endpoint, the V-EES Supported application information, such as application ID, data network name corresponding to V-EES, such as DNN, etc.
  • the information of the above-mentioned V-EES may further include its corresponding slice information and the like.
  • the above-mentioned first response information may further include a security credential for accessing the V-EES.
  • the above-mentioned first response information may carry indication information that there is no V-EES matching the second request information, and the like.
  • the first response may include first information, and the first information may be information of the cloud platform or information of the DNS server of the cloud platform.
  • V-ECS determines the information of the V-EES according to the second request information
  • Step 504 the H-ECS returns V-EES information, or first information, etc. to the UE, where the V-EES information may be V-EES address information or V-EES identification information.
  • the above V-EES information, or the first information may be sent through the second response information, and the second response information may be a configuration response provision response or the like.
  • the above-mentioned second response information may carry the information of the V-EES, and the information of the V-EES at least includes the address of the V-EES Information or V-EES identification information, for the specific content included in the V-EES information, please refer to the above description. Further, the above-mentioned second response message may also carry a security credential for accessing the V-EES. Alternatively, if there is no V-EES matching the second request information, the above-mentioned second response information may carry indication information that there is no V-EES matching the second request information, or carry information about the cloud platform, or the cloud platform DNS server information. The information of the cloud platform or the information of the cloud platform DNS server may be obtained from the V-ECS, or may be pre-configured in the H-ECS, which is not limited.
  • step 505 is performed, and the EEC initiates an EAS discovery request process to the V-EES to obtain the application's EAS information.
  • the UE may send an EAS discovery request to the V-EES, where the EAS sending request carries a security credential for accessing the V-EES, and the V-EES may authenticate and authorize the UE according to the security credential.
  • the authorization is passed, an EAS discovery response is returned to the UE.
  • the EAS discovery response carries the information of the application instance registered in the V-EES in the V network, that is, the information of the EAS registered in the V-EES.
  • the UE after the UE registers with the visited network, it still connects to the Home network to obtain the EES information of the visited network, so that the UE only needs to establish a connection with the ECS of the Home network to obtain the EES of the visited network, which simplifies the The UE discovers the signaling logic of the EES of the visited network in the roaming scenario.
  • the first ECS may receive the PLMN identity of the second network from the terminal device.
  • the first ECS may determine the information of the second ECS according to the PLMN identifier of the second network. After that, the first ECS sends the first request information to the second ECS.
  • the second ECS may determine whether there is a second EES that matches the first request information; if so, the second ECS sends to the first ECS indication information that there is a second EES that matches the first request information , otherwise, the second ECS sends, to the first ECS, indication information that there is no second EES matching the first request information.
  • the first ECS may send the information of the second ECS to the terminal device. Afterwards, the terminal device may request the second ECS for the information of the second EES according to the information of the second ECS.
  • the terminal device is the UE
  • the first network is the home network (referred to as the H network)
  • the second network is the visited network (referred to as the V network).
  • the first ECS and the first EAS are respectively H-ECS and H-EAS
  • the second ECS, the second EES and the second EAS are respectively V-ECS, V-EES and V-EAS as an example to describe, including But not limited to:
  • step 600 the UE accesses the V network.
  • Step 601 the UE sends first request information to the H-ECS, where the first request information is used to request the information of the EES.
  • the first request information may carry one or more of the PLMN ID of the V network, the location of the UE in the V network, and application information of the UE.
  • the first request information may be sent through a configuration request provision request or other messages.
  • the H-ECS determines the information of the V-ECS according to the PLMN identifier of the V network.
  • the information of the V-ECS may be address information of the V-ECS or identification information of the V-ECS.
  • the V-ECS For a specific way of determining the V-ECS, reference is made to the description of step 502, and details are not repeated here.
  • Step 603a the H-ECS sends the second request information to the V-ECS, where the second request information is used to request the V-EES matching the second request information, or, described as, the second request information is used to ask the V-ECS Inquire whether there is a V-EES that matches the second request information.
  • the above-mentioned second request information may include application information, location information, and the like.
  • the above-mentioned second request information can be sent through a configuration request provision request, or an EES request EES request, or an EES available request EES Availability request and other messages.
  • steps 600-603a reference may be made to the description of steps 500-503a in FIG. 4, and details are not repeated here.
  • Step 603b the V-ECS sends to the H-ECS indication information whether there is a V-EES matching the second request information according to the second request information.
  • the above-mentioned indication information of whether there is a V-EES matching the second request information may be sent through the first response information.
  • the first response information may be a configuration response provision response, or an EES response EES response, or an EES availability response EES Availability response, or the like.
  • the above-mentioned first response information may carry indication information of the V-EES matching the second request information. If there is no V-EES matching the second request information, the above-mentioned first response information may include the indication information of the V-EES that does not match the second request information, or the information returned to the cloud platform or the cloud platform DNS server information, etc. .
  • binary bit 1 may be used to indicate that there is indication information of V-EES that conforms to the second request information
  • binary bit 0 may be used to indicate that there is no V-EES indication information that conforms to the second request information.
  • the H-ECS returns the V-ECS information, or the first information, to the UE.
  • the information of the V-ECS may be address information of the V-ECS, or identification information of the V-ECS.
  • the first information may be the information of the central cloud platform, or the information of the DNS server of the central cloud platform.
  • the V-EES information or the first information may be sent through the second response information.
  • the second response information may be a configuration response provision response message.
  • the above-mentioned first response information includes indication information for indicating that there is a V-EES matching the second request information
  • the above-mentioned second response information may include the above-mentioned address information of the V-ECS .
  • the second response information may further include a security credential for accessing the V-ECS.
  • the above-mentioned first response information includes indication information for indicating that there is no V-EES matching the second request information, or, if the above-mentioned first response information includes information of the central cloud platform , or the information of the cloud platform DNS server, etc.
  • the above-mentioned second response information may include indication information (such as failure indication) that there is no EES that meets the request, or include cloud platform information or cloud platform DN server information.
  • the information of the cloud platform or the information of the DNS server of the cloud platform may be carried in the above-mentioned first response information, that is, returned by the V-ECS. Alternatively, it may be locally configured for the H-ECS, etc., which is not limited.
  • the UE can connect to the V-ECS and obtain the information of the V-EES from the V-ECS, and perform the following steps 605a and 605b. . If the above-mentioned second response information carries the information of the central cloud platform or the cloud platform DNS server, the UE can obtain the information of the corresponding application server from the cloud central cloud platform or the cloud platform DNS server.
  • the UE sends third request information to the V-ECS, which is used to obtain the information of the V-EES corresponding to the V network.
  • the above-mentioned third request information may include application information of the UE, location information of the UE in the V network, and the like.
  • the above-mentioned third request information may be sent by a message such as a configuration request provision request.
  • the above-mentioned third request information may also carry a security credential for accessing the V-ECS.
  • the V-ECS authenticates and authorizes the UE according to the security credential.
  • the V-ECS searches for a matching third request information according to the location information of the UE, or/or application information, etc.
  • V-EES after the search is successful, it returns the V-EES information corresponding to the V network to the EEC, that is, the V-ECS returns the V-EES information to the UE, and the V-EES information can be sent through the third response message.
  • the third response message It can be a configuration response provision response, etc.
  • the UE obtains the address information of the V-ECS from the H-ECS, and obtains the information of the V-EES directly from the V-ECS. This solution enables the UE to discover the V-EES and protect the V-EES at the same time. Topological information of EES.
  • the first ECS may receive the PLMN identity of the second network from the first EES.
  • the first ECS may determine the information of the second ECS according to the PLMN identifier of the second network. After that, the first ECS sends the first request information to the second ECS.
  • the second ECS may determine whether there is a second EES matching the first request information; if so, send the address information of the second EES or the identification information of the second EES to the first ECS, The first ECS then sends the address information of the second EES or the identification information of the second EES to the first EES.
  • the second ECS may send the first information to the first ECS, the first information may be used for the acquisition of the access point of the application. And the first ECS sends the first information to the first EES.
  • the foregoing first information may be acquired from the second ECS, or locally matched by the first ECS, etc., which are not limited.
  • the terminal device is the UE
  • the first network is the home network (H network for short)
  • the second network is the visited network (V network for short)
  • the EAS are S-EES, H-ECS, and H-EAS respectively
  • the second EES, the second ECS, and the second EAS are respectively V-EES, V-ECS, and V-EAS, including but not limited to:
  • step 700 the UE registers with the V network.
  • the UE connects to the S-EES corresponding to the home network, and sends the first request information to the S-EES, and the first request information may be sent by a message such as a connection request.
  • the first request information includes the PLMN ID of the V network, or the location of the UE in the V network, for example, the cell ID of the UE in the V network, and the like.
  • the above-mentioned first request information may further include the IP address of the UE and the like.
  • the S-EES is the EES corresponding to the EAS currently serving the connection of the application client of the terminal device. Different EASs connected to different application clients of the terminal device can be served by different EESs.
  • the S-EES detects that the UE moves to the V network. For example, the S-EES receives a UP path management event notification, which includes the target DNAI and the new IP address of the UE.
  • the S-EES can determine that the current S-EES is not the optimal EES according to the change of the PLMN ID of the UE, or the target DNAI indicates that the target DNAI corresponds to the V network, or the IP address of the UE changes, and the S-EES triggers the application migration.
  • Step 703 the S-EES connects to the ECS corresponding to its corresponding home network, that is, the H-ECS, and sends second request information to the H-ECS for requesting the information of the EES.
  • the second request information may be sent through a provisioning request message.
  • the second request information may carry one or more of the application information of the UE, the location of the UE in the V network, the PLMN ID of the V network, the IP address of the UE, and the like.
  • the H-ECS obtains the information of the V-ECS according to the PLMN ID of the V network.
  • the information of the V-ECS may be address information of the V-ECS, or identification information of the V-ECS, or the like.
  • the address may be pre-configured in the H-ECS, or deduced by the H-ECS from the PLMN ID.
  • the H-ECS sends third request information to the V-ECS for requesting the V-EES corresponding to the second network.
  • the third request information may include location information, application information, and the like.
  • the above-mentioned third request information can be sent through the configuration request provision request, or the EES request EES request, or the EES can request the EES Availability request and other messages, which are not limited.
  • the V-ECS sends the V-EES information, or the first information, to the H-ECS.
  • the information of the V-EES may be identification information of the V-EES, or address information of the V-EES, and the like.
  • the first information may be the information of the central cloud platform, or the information of the DNS server of the central cloud platform, or the like.
  • the information of the V-EES or the first information may be sent through the first response information.
  • the first response information may be a configuration response provision response, or an EES response EES response, or an EES availability response EES Availability response, etc., which are not limited.
  • the V-ECS may determine whether there is a V-EES matching the third request information according to the third request information in the foregoing step 705a. If there is a V-EES matching the third request information, the above-mentioned first response information may include information of the V-EES matching the third request information.
  • the information of the above V-EES may be an EES configuration profile, or a tailored EES configuration profile, which may include address information of the V-EES, such as the address of the endpoint, and application information supported by the V-EES, for example, Application ID, data network name corresponding to V-EES, such as DNN, etc.
  • the information of the above-mentioned V-EES may further include its corresponding slice information and the like.
  • the above-mentioned first response information may further include a security credential for accessing the V-EES.
  • the above-mentioned first response information may carry indication information that there is no V-EES matching the third request information, and the like.
  • the above-mentioned first response may further include information of the cloud platform, or information of the DNS server of the cloud platform.
  • Step 706 the H-ECS sends the V-EES information, or the first information, to the S-EES.
  • the above V-EES information, or the first information may be sent through the second response information.
  • the second response information may be a configuration response provision response and other messages.
  • the above-mentioned second response information may carry information of the V-EES. Or, if there is no V-EES matching the third request information, the above-mentioned second response information may carry the indication information that there is no V-EES matching the third request information, or carry the information of the cloud platform, or the cloud platform DNS server information.
  • the information of the cloud platform or the information of the DNS server of the cloud platform may be obtained from the V-ECS, or may be pre-configured in the H-ECS, which is not limited.
  • step 707 is performed.
  • the S-EES sends an application context migration request to the V-EES, so that the application context of the UE is switched from the H-EAS to the V-EAS.
  • the above context migration request may carry application information of the UE and location information of the UE.
  • security credentials can also be carried.
  • V-EES can process the context request information of S-EES according to the above-mentioned security credentials and S-EES request, after the authentication and authorization are passed, to realize the IP address exchange between H-EAS and V-EAS, and complete the application context migration of UE , migrating the UE's application context from H-EAS to V-EAS.
  • the UE after the UE registers with the V network, it can still connect to the S-EES and the H-EAS.
  • the S-EES judges that the UE has moved to the V network, and the current H-EAS or S-EES is no longer the most suitable EAS or EES.
  • -ECS acting as the agent of EES, interacts with V-ECS to obtain V-EES information, thereby reducing the external interaction interface of V network.
  • the above process mainly describes that when the UE moves and registers with the V network, the UE can still connect to the S-EES of the home network and report its PLMN ID to the S-EES.
  • the S-EES can also detect the movement of the UE and register with the V network through other methods, and then trigger the context migration of the application, find the V-EES in the V network, realize the application context migration of the UE, and ensure the service experience and service of the UE. continuity.
  • the first ECS may receive the PLMN identity of the second network from the first EES.
  • the first ECS may determine the information of the second ECS according to the PLMN identifier of the second network. After that, the first ECS sends the first request information to the second ECS.
  • the second ECS may determine whether there is a second EES matching the first request information; if so, the second ECS sends the first ECS indication information of the second EES matching the first request information, Otherwise, the second ECS sends to the first ECS indication information that there is no second EES matching the first request information.
  • the first ECS may send the information of the second ECS to the first EES. Afterwards, the first EES may request information of the second EES from the second ECS by itself.
  • the terminal device is the UE
  • the first network is the home network
  • the second network is the visited network (referred to as the V network)
  • the first network is the visited network (referred to as the V network).
  • the first EES, the first ECS, and the first EAS are respectively S-EES, H-ECS, and H-EAS
  • the second EES, the second ECS, and the second EAS are respectively V-EES, V-ECS, and V-EAS. describe, including but not limited to:
  • step 800 the UE registers with the V network.
  • the UE connects to the S-EES located in the home network, and sends first request information to the S-EES, where the first request information may also be referred to as a connection request, and the first request information may include the V network.
  • the first request information may also be referred to as a connection request, and the first request information may include the V network.
  • the PLMN ID of the UE, or the location information of the UE in the V network may further include the IP address of the UE and the like.
  • the S-EES detects that the UE moves to the V network.
  • the S-EES connects to the ECS of its corresponding home network, that is, the H-ECS, and sends second request information to the H-ECS for requesting the information of the EES.
  • the second request information may carry one or more of the application information of the UE, the location of the UE in the V network, the PLMN ID of the V network, the IP address of the UE, and the like.
  • the second request information may be sent through a configuration request provision request and other messages.
  • the H-ECS obtains the information of the V-ECS according to the PLMN ID of the V network.
  • the information of the V-ECS may be the identification information of the V-ECS, or the address information of the V-ECS.
  • Step 805a the H-ECS sends third request information to the V-ECS for requesting the second network to correspond to the V-EES.
  • the second request information may include one or more of location information, application information, and the like.
  • the above-mentioned third request information can be sent through the configuration request provision request, or the EES requests the EES request, or the EES can request the EES Availability request and other messages, which are not limited.
  • Step 805b the V-ECS sends to the H-ECS indication information whether there is a V-EES matching the third request information.
  • the above-mentioned indication information of whether there is a V-EES matching the third request information can be sent through the first response information, and the first response message can be the configuration response provision response, or the EES response EES response, or the EES available response EES Availability response, etc. , without limitation.
  • the V-ECS may determine whether there is a V-EES matching the third request information according to the third request information in the foregoing step 805a. If there is a V-EES matching the third request information, the above-mentioned first response information may carry indication information that there is a V-EES matching the third request information, for example, the indication information may be represented by bit 1 or the like.
  • the above-mentioned first response information may carry indication information that there is no V-EES matching the third request information, for example, the indication information can be represented by bit 0, etc.
  • the above-mentioned first response information may carry the information of the central cloud platform, or the information of the DNS service of the central cloud platform, and the like.
  • the H-ECS sends the V-ECS information, or the first information, etc. to the S-EES.
  • the information of the V-ECS may be address information of the V-ECS, or identification information of the V-ECS.
  • the above-mentioned first information may be the information of the central cloud platform, or the information of the DNS server of the central cloud platform, or the like.
  • the address information of the V-ECS or the first information may be sent through the second response information.
  • the second response information may be a configuration response provision response message or the like.
  • the above-mentioned first response information carries indication information that there is a V-EES matching the third request information
  • the above-mentioned second response information may carry the address information of the V-ECS.
  • the above-mentioned first response information does not carry the indication information that there is a V-EES matching the third request information, or, if it carries the information of the central cloud platform or the information of the DNS server of the central cloud platform information, the above-mentioned second response information may carry the information of the central cloud platform, or the information of the DNS server of the cloud platform, and the like.
  • the information of the central cloud platform, or the information of the cloud platform DNS server may be obtained from the V-ECS, or may be pre-configured in the H-ECS.
  • the S-EES sends fourth request information to the V-ECS, where the fourth request information may be sent through a configuration request provision request, etc., and the fourth request information is used to obtain the EES information corresponding to the V network.
  • the fourth request information may carry application information of the UE, location information of the UE in the V network, security credentials for accessing the V-ECS, and the like.
  • the V-ECS sends the V-EES information to the S-EES.
  • the information of the V-EES may be sent through fourth response information, where the fourth response information may be a configuration response provision response message.
  • the fourth response information includes V-EES information.
  • the fourth response information may further include a security credential for accessing the V-EES.
  • step 808 the S-EES initiates application context migration to migrate the application context of the UE from the H-EAS to the V-EAS.
  • the UE after the UE registers with the V network, it can still connect to the S-EES and H-EAS of the home network.
  • the H-WWS can determine that the UE has moved to the V network according to the change of the PLMN ID of the UE, or the change of the IP address, and the H-EAS or S-EES of the current home network is no longer the most suitable EAS and EES. .
  • the H-ECS interacts with the V-ECS, and after confirming that the V-ECS has the V-EES that satisfies the application and location information, the S-EES requests the V-ECS for the V-EES that satisfies the application and location information to ensure the validity of the request. , to achieve user business continuity.
  • FIG. 8 is a schematic block diagram of an apparatus 900 provided by an embodiment of the present application, which is used to implement the functions of the first ECS, the first device, or the second ECS in the foregoing method.
  • the apparatus may be a software unit or a system-on-a-chip.
  • the chip system may be composed of chips, and may also include chips and other discrete devices.
  • the apparatus includes a communication unit 901 and may further include a processing unit 902 .
  • the communication unit 901 can communicate with the outside.
  • the processing unit 902 is used for processing.
  • the communication unit 901 may also be referred to as a communication interface, a transceiver unit, an input/output interface, and the like.
  • the apparatus 900 may implement steps corresponding to the first ECS in the above method embodiment, and the apparatus 900 may be the first ECS, or a chip or circuit configured in the first ECS.
  • the communication unit 901 performs the transceiving operation of the first ECS in the above method embodiment, and the processing unit 902 is configured to perform the processing related operation of the first ECS in the above method embodiment.
  • the communication unit 901 is configured to receive a public land mobile network PLMN identifier of a second network from a first device, where the first device includes a terminal device or a first EES; the processing unit 902 is configured to, according to the PLMN identifier, Send first request information to the second ECS, where the first request information is used to request information of the second EES corresponding to the second network; the communication unit 901 is further configured to receive all the information from the second ECS. information about the second EES;
  • the home network of the terminal device is the first network, the first ECS and the first EES respectively correspond to the first network, the second network is the service network of the terminal device, and the second ECS , the second EES respectively corresponds to the second network.
  • the communication unit 901 is further configured to receive one or more items of location information of the terminal device in the second network and application information of the terminal device from the first device.
  • the first request information includes one or more items of location information of the terminal device in the second network and application information of the terminal device.
  • the information of the second EES includes address information of the second EES or identification information of the second EES that matches the first request information
  • the communication unit 901 is further configured to send the information to the first device. information about the second EES.
  • the communication unit 901 is further configured to receive a security credential for accessing the second EES from the second ECS, and send the security credential of the second EES to the first device.
  • the information of the second EES is used to indicate that there is a second EES matching the first request information
  • the communication unit 901 is further configured to send the information of the second ECS to the first device.
  • the communication unit 901 is further configured to receive a security credential for accessing the second ECS from the second ECS, and send the security credential of the second ECS to the first device.
  • the information of the second EES is used to indicate that there is no second EES matching the first request information
  • the communication unit 901 is further configured to send the first information to the first device, the first The information is acquired from the second ECS or configured locally, and the first information is used for acquisition of the access point of the application.
  • the apparatus 900 may implement steps corresponding to the first device in the above method embodiment, and the apparatus 900 may be the first device, or a chip or circuit configured in the first device.
  • the communication unit 901 performs the sending and receiving operations of the first device in the above method embodiments, and the processing unit 902 is configured to perform processing related operations of the first device in the above method embodiments.
  • the communication unit 901 is configured to send the public land mobile network PLMN identifier of the second network to the first ECS, where the PLMN identifier is used to confirm the information of the second ECS; the communication unit 901 is further configured to receive the information of the second EES. information; wherein the first device includes a terminal device or a first EES, the home network of the terminal device is the first network, the first EES and the first ECS respectively correspond to the first network, and the The second network is a service network of the terminal device, and the second ECS and the second EES respectively correspond to the second network.
  • the communication unit 901 is further configured to send one or more of the following information to the first ECS: location information of the terminal device in the second network, application information of the terminal device .
  • the information of the second EES includes address information of the second EES or identification information of the second EES that matches the first request information;
  • the receiving the information of the second EES includes: receiving the information of the second EES from the first ECS.
  • the communication unit 901 is further configured to receive a security credential for accessing the second EES from the first ECS.
  • the information of the second EES is used to indicate that there is a second EES that matches the first request information
  • the receiving the information of the second EES includes: receiving the second EES from the first ECS information of the ECS; sending second request information to the second ECS, where the second request information is used to request the information of the second EES; receiving the information of the second EES from the second ECS, the The information of the second EES includes address information of the second EES or identification information of the second EES that matches the first request information.
  • the communication unit 901 is further configured to: receive a security credential for accessing the second ECS from the first ECS.
  • the information of the second EES is used to indicate that there is no second EES matching the first request information
  • the communication unit 901 is further configured to: receive the first information from the first ECS, the The first information is used to obtain the access point of the application.
  • the first device is the first EES
  • the communication unit 901 is further configured to: receive third request information from the terminal device, where the third request information includes the PLMN identifier of the second network .
  • the apparatus 900 may implement steps corresponding to the second ECS in the above method embodiments, and the apparatus 900 may be the second ECS, or a chip or circuit configured in the second ECS.
  • the communication unit 901 performs the transceiving operation of the second ECS in the above method embodiment, and the processing unit 902 is configured to perform the processing related operation of the second ECS in the above method embodiment.
  • the communication unit 901 is configured to receive first request information from the first ECS, where the first request information is used to request information of the second edge-enabled server EES corresponding to the second network; the communication unit 901 is further configured to is used to send the information of the second EES to the first ECS; wherein the second ECS and the second EES respectively correspond to the second network, the first ECS corresponds to the first network, and the The first network is the home network of the terminal device, and the second network is the service network of the terminal device.
  • the first request information includes one or more items of location information of the terminal device in the second network and application information of the terminal device.
  • the information of the second EES includes address information of the second EES or identification information of the second EES that matches the first request information.
  • the communication unit 901 is further configured to send a security credential for accessing the second EES to the first ECS.
  • the information of the second EES is used to indicate whether there is a second EES matching the first request information.
  • the communication unit 901 is further configured to send a security credential for accessing the second ECS to the first ECS.
  • the information of the second EES indicates that there is no second EES matching the first request information
  • the communication unit 901 is further configured to send first information to the first ECS, the first information using Access point acquisition for the application.
  • each unit in the device can be implemented in the form of software calling through the processing element; also all can be implemented in the form of hardware; some units can also be implemented in the form of software calling through the processing element, and some units can be implemented in the form of hardware.
  • each unit may be a separate and independent processing element, or may be integrated in a certain chip of the device.
  • it can also be stored in the memory in the form of a program, and the function of the unit can be called and executed by a certain processing element of the apparatus.
  • each step of the above method or each of the above units may be implemented by an integrated logic circuit of hardware in the processor element or implemented in the form of software being invoked by the processing element.
  • a unit in any of the above apparatuses may be one or more integrated circuits configured to implement the above method, such as: one or more Application Specific Integrated Circuits (ASICs), or, one or more Multiple microprocessors (digital singnal processors, DSP), or, one or more field programmable gate arrays (Field Programmable Gate Array, FPGA), or a combination of at least two of these integrated circuit forms.
  • ASICs Application Specific Integrated Circuits
  • DSP digital singnal processors
  • FPGA Field Programmable Gate Array
  • FPGA Field Programmable Gate Array
  • a unit in the apparatus can be implemented in the form of a processing element scheduler
  • the processing element can be a general-purpose processor, such as a central processing unit (Central Processing Unit, CPU) or other processors that can invoke programs.
  • CPU central processing unit
  • these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).
  • SOC system-on-a-chip
  • the above unit for receiving is an interface circuit of the device for receiving signals from other devices.
  • the receiving unit is an interface circuit used by the chip to receive signals from other chips or devices.
  • the above unit for sending is an interface circuit of the device for sending signals to other devices.
  • the sending unit is an interface circuit used by the chip to send signals to other chips or devices.
  • FIG. 9 is a schematic block diagram of an apparatus 1000 provided by an embodiment of the present application.
  • the apparatus 1000 shown in FIG. 9 may be an implementation of a hardware circuit of the apparatus shown in FIG. 8 .
  • the apparatus can be applied to the processes in the above method embodiments to perform the functions of the first ECS, the first device or the second ECS in the above method embodiments.
  • FIG. 9 only shows the main components of the communication device.
  • the communication apparatus 1000 shown in FIG. 9 includes at least one processor 1001 .
  • Communication apparatus 1000 may also include at least one memory 1002 for storing program instructions and/or data.
  • Memory 1002 is coupled to processor 1001 .
  • the coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the processor 1001 may cooperate with the memory 1002 , the processor 1001 may execute program instructions stored in the memory 1002 , and at least one of the at least one memory 1002 may be included in the processor 1001 .
  • the apparatus 1000 may also include a communication interface 1003 for communicating with other devices through a transmission medium, so that the communication apparatus 1000 may communicate with other devices.
  • the communication interface may be a transceiver, a circuit, a bus, a module, or other types of communication interfaces.
  • the transceiver when the communication interface is a transceiver, the transceiver may include an independent receiver and an independent transmitter; it may also be a transceiver integrating a transceiver function, or an interface circuit.
  • connection medium between the above-mentioned processor 1001 , the memory 1002 , and the communication interface 1003 is not limited in the embodiments of the present application.
  • the memory 1002, the processor 1001, and the communication interface 1003 are connected through a communication bus 1004 in FIG. 9.
  • the bus is represented by a thick line in FIG. 9, and the connection between other components is only a schematic illustration. , not as a limitation.
  • the bus may include an address bus, a data bus, a control bus, and the like. For convenience of presentation, only one thick line is used in FIG. 9, but it does not mean that there is only one bus or one type of bus.
  • the apparatus 1000 is configured to implement the steps performed by the first ECS in the above method embodiments.
  • the communication interface 1003 is configured to perform the transceiving related operations of the first ECS in the above embodiments
  • the processor 1001 is configured to perform the processing related operations of the first ECS in the above method embodiments.
  • the communication interface 1003 is configured to receive a public land mobile network PLMN identifier of a second network from a first device, where the first device includes a terminal device or a first EES; the processor 1001 is configured to, according to the PLMN identifier, Send first request information to the second ECS, where the first request information is used to request information of the second EES corresponding to the second network; the communication interface 1003 is further configured to receive all information from the second ECS. information about the second EES;
  • the home network of the terminal device is the first network, the first ECS and the first EES respectively correspond to the first network, the second network is the service network of the terminal device, and the second ECS , the second EES respectively corresponds to the second network.
  • the communication interface 1003 is further configured to receive one or more items of location information of the terminal device in the second network and application information of the terminal device from the first device.
  • the first request information includes one or more items of location information of the terminal device in the second network and application information of the terminal device.
  • the information of the second EES includes address information of the second EES or identification information of the second EES that matches the first request information
  • the communication interface 1003 is further configured to send the information to the first device. information about the second EES.
  • the communication interface 1003 is further configured to receive a security credential for accessing the second EES from the second ECS, and send the security credential of the second EES to the first device.
  • the information of the second EES is used to indicate that there is a second EES matching the first request information, and the communication interface 1003 is further configured to send the information of the second ECS to the first device.
  • the communication interface 1003 is further configured to receive a security credential for accessing the second ECS from the second ECS, and send the security credential of the second ECS to the first device.
  • the information of the second EES is used to indicate that there is no second EES matching the first request information
  • the communication interface 1003 is further configured to send the first information to the first device, the first The information is acquired from the second ECS or configured locally, and the first information is used for acquisition of the access point of the application.
  • the apparatus 1000 is configured to implement the steps performed by the first device in the above method embodiments.
  • the communication interface 1003 is configured to perform the transceiving related operations of the first device in the above embodiments
  • the processor 1001 is configured to perform the processing related operations of the first device in the above method embodiments.
  • the communication interface 1003 is used to send the public land mobile network PLMN identity of the second network to the first ECS, where the PLMN identity is used to confirm the information of the second ECS; the communication interface 1003 is also used to receive the information of the second EES. information; wherein, the first device includes a terminal device or a first EES, the home network of the terminal device is a first network, the first EES and the first ECS respectively correspond to the first network, and the The second network is a service network of the terminal device, and the second ECS and the second EES respectively correspond to the second network.
  • the communication interface 1003 is further configured to send one or more of the following information to the first ECS: location information of the terminal device in the second network, application information of the terminal device .
  • the information of the second EES includes address information of the second EES or identification information of the second EES that matches the first request information;
  • the receiving the information of the second EES includes: receiving the information of the second EES from the first ECS.
  • the communication interface 1003 is further configured to receive a security credential for accessing the second EES from the first ECS.
  • the information of the second EES is used to indicate that there is a second EES that matches the first request information
  • the receiving the information of the second EES includes: receiving the second EES from the first ECS information of the ECS; sending second request information to the second ECS, where the second request information is used to request the information of the second EES; receiving the information of the second EES from the second ECS, the The information of the second EES includes address information of the second EES or identification information of the second EES that matches the first request information.
  • the communication interface 1003 is further configured to: receive a security credential for accessing the second ECS from the first ECS.
  • the information of the second EES is used to indicate that there is no second EES matching the first request information
  • the communication interface 1003 is further configured to: receive the first information from the first ECS, the The first information is used to obtain the access point of the application.
  • the first device is the first EES
  • the communication interface 1003 is further configured to: receive third request information from the terminal device, where the third request information includes the PLMN identifier of the second network .
  • the apparatus 1000 is configured to implement the steps performed by the second ECS in the above method embodiments.
  • the communication interface 1003 is configured to perform the transceiving related operations of the second ECS in the above method embodiments, and the processor 1001 is configured to perform the processing related operations of the second ECS in the above method embodiments.
  • the communication interface 1003 is configured to receive first request information from the first ECS, where the first request information is used to request information of the second edge-enabled server EES corresponding to the second network; the communication interface 1003 is further configured to is used to send the information of the second EES to the first ECS; wherein the second ECS and the second EES respectively correspond to the second network, the first ECS corresponds to the first network, and the The first network is the home network of the terminal device, and the second network is the service network of the terminal device.
  • the first request information includes one or more items of location information of the terminal device in the second network and application information of the terminal device.
  • the information of the second EES includes address information of the second EES or identification information of the second EES that matches the first request information.
  • the communication interface 1003 is further configured to send a security credential for accessing the second EES to the first ECS.
  • the information of the second EES is used to indicate whether there is a second EES matching the first request information.
  • the communication interface 1003 is further configured to send a security credential for accessing the second ECS to the first ECS.
  • the information of the second EES indicates that there is no second EES matching the first request information
  • the communication interface 1003 is further configured to send the first information to the first ECS, the first information using Access point acquisition for the application.
  • an embodiment of the present application further provides an apparatus, where the apparatus is configured to execute the method in the above method embodiment.
  • a computer-readable storage medium comprising a program, when the program is executed by a processor, the methods in the above method embodiments are performed.
  • a computer program product comprising computer program code, when the computer program code is run on a computer, causes the computer to implement the methods in the above method embodiments.
  • a chip comprising: a processor, the processor is coupled with a memory, the memory is used for storing a program or an instruction, when the program or instruction is executed by the processor, the device causes an apparatus to perform the above method embodiments Methods.
  • the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, which may be implemented or executed
  • a general purpose processor may be a microprocessor or any conventional processor or the like.
  • the steps of the methods disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.
  • the memory may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or may also be a volatile memory (volatile memory), for example Random-access memory (RAM).
  • Memory is, but is not limited to, any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
  • the memory in this embodiment of the present application may also be a circuit or any other device capable of implementing a storage function, for storing program instructions and/or data.
  • the methods provided in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software When implemented in software, it can be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present invention are generated.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, network equipment, user equipment, or other programmable apparatus.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server or data center by wire (eg coaxial cable, optical fiber, digital subscriber line, DSL for short) or wireless (eg infrared, wireless, microwave, etc.).
  • the computer-readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes one or more available media integrated.
  • the usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, digital video discs (DVD)), or semiconductor media (eg, SSDs), and the like.

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Abstract

本申请实施例提供一种通信方法及装置，该方法包括：第一ECS接收来自第一设备的PLMN标识，第一ECS根据PLMN标识，向第二ECS发送第一请求信息，第一请求信息用于请求匹配第一请求信息的第二EES的信息，第一ECS接收来自第二ECS的第二EES的信息；上述第一设备可以为终端设备或第一EES；采用本申请的方法及装置，当终端设备发生漫游，由第一网络切换到第二网络时，终端设备可确定第二网络对应的第二EES的信息。

Description

一种通信方法及装置
相关申请的交叉引用
本申请要求在2020年07月13日提交中国专利局、申请号为202010670931.8、申请名称为“一种通信方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及通信技术领域，尤其涉及一种通信方法及装置。
背景技术
多接入边缘计算(multi-access edge computing，MEC)，可利用无线接入网络就近为电信用户提供信息技术(information technology，IT)所需服务和云端计算功能，从而创造出一个具备高性能、低延迟与高带宽的电信级服务环境，加速网络中各项内容、服务及应用的快速下载，让用户享有不间断的高质量网络体验。
由于终端设备的移动，可能会造成漫游，例如，终端设备从北京移动到上海。那么，终端设备需要从北京的归属(home)公共陆地移动网络(public land mobile network，PLMN)网络，切换到上海的拜访(visited)PLMN网络。终端设备如何获取拜访PLMN网络对应的边缘使能服务器(edge enabler server，EES)信息，是本申请实施例待解决的技术问题。
发明内容
本申请实施例提供一种通信方法及装置，以使得终端设备可获取拜访PLMN网络对应的EES信息。
第一方面，提供一种通信方法，该方法的执行主体为第一ECS，可以理解的是，第一ECS可以为第一ECS，或者可以为配置于第一ECS中的部件(例如，芯片、电路或其它等)，该方法包括：第一ECS接收来自第一设备的第二网络的PLMN标识，第一ECS根据所述PLMN标识，向第二ECS发送第一请求信息，该第一请求信息用于请求第二网络对应的第二EES的信息；第一ECS接收来自第二ECS的第二EES的信息；其中，第一设备为终端设备或者第一EES，所述终端设备的归属网络为第一网络，所述第一ECS、所述第一EES分别对应所述第一网络，第二网络为所述终端设备的服务网络，所述第二ECS、所述第二EES分别对应所述第二网络。
通过上述设计，第一ECS可代替第一设备与第二ECS交互，获知第二网络对应的V-EES的信息，简化了第一设备在漫游场景下发现第二网络对应的EES的信令逻辑。同时，采用上述方法，第一设备无需自己感知第二ECS的信息，从而可解决当第一设备漫游到多个网络时，由第一设备感知多个网络的第二ECS的信息，所导致的对终端设备要求高，第一设备的边缘业务访问授权鉴权复杂，不易控制，实现逻辑复杂等问题。
在一种可能的设计中，所述第一ECS接收来自所述第一设备的所述终端设备在所述第二网络中的位置信息、所述终端设备的应用信息中的一项或多项。
在一种可能的设计中，所述第一请求信息包括所述终端设备在所述第二网络中的位置信息、所述终端设备的应用信息中的一项或多项。
在一种可能的设计中，所述第二EES的信息中包括匹配所述第一请求信息的第二EES的地址信息或第二EES的标识信息，所述方法还包括：所述第一ECS向所述第一设备发送所述第二EES的信息。
通过上述设计，第二ECS在接收到第一请求信息之后，可确定是否存在匹配第一请求信息的V-EES的信息。如果存在，直接将V-EES的信息发送给第一设备。之后，第一设备可直接发起EAS发起流程。如此，可简化第一设备的操作。
在一种可能的设计中，还包括：所述第一ECS接收来自所述第二ECS的用于访问所述第二EES的安全凭证；所述第一ECS向所述第一设备发送所述第二EES的安全凭证。
通过上述设计，第一设备通过第二EES的安全凭证，访问第二EES，可提高访问第二EES的安全性，避免冒充的第一设备访问第二EES，所导致的第二EES的信息泄露。
在一种可能的设计中，所述第二EES的信息用于指示存在匹配所述第一请求信息的第二EES，所述方法还包括：所述第一ECS向所述第一设备发送所述第二ECS的信息。
通过上述设计，第二ECS在接收到第一请求信息后，可确定是否存在匹配第二请求信息的第二EES。如果存在匹配第二请求信息的第二EES，则将第二ECS的信息返回给第一ECS，第一ECS再将上述第二ECS的信息反馈给第一设备。而第一设备可自己向第一ECS请求第二EES的信息，这样可避免V-EES的拓扑结束的泄露。
在一种可能的设计中，还包括：所述第一ECS接收来自所述第二ECS的用于访问所述第二ECS的安全凭证；所述第一ECS向所述第一设备发送所述第二ECS的安全凭证。
通过上述设计，第一设备通过安全凭证访问第二ECS，可保护第二ECS的信息安全。
在一种可能的设计中，所述第二EES的信息用于指示不存在匹配所述第一请求信息的第二EES，所述方法还包括：所述第一ECS向所述终端设备发送第一信息，所述第一信息是从所述第二ECS获取的或者本地配置的，所述第一信息用于应用的接入点的获取。
通过上述设计，当不存在匹配第一请求信息的第二EES时，第一ECS还可将第一信息返回给第一设备，第一信息可以为中心云平台，或中心云平台DNS服务器的信息。最终，由中心云平台，或中心云平台服务器为第一设备提供服务，保证在不存在匹配的第二EES的情况下，也可为第一设备提供相应服务。
第二方面，提供一种通信方法，该方法的执行主体为第一设备，可以理解的是，第一设备可以为终端设备或第一EES，终端设备可以为终端设备，或者配置于终端设备中的部件(例如，芯片、电路或其它等)，第一EES可以是第一EES，或者配置于第一EES中的部件等，该方法包括：第一设备向第一边缘配置服务器ECS发送第二网络的公共陆地移动网络PLMN标识，所述PLMN标识用于第二ECS的信息的确认；所述第一设备接收第二边缘使能服务器EES的信息；其中，所述第一设备包括终端设备或第一EES，所述终端设备的归属网络为第一网络，所述第一EES、所述第一ECS分别对应所述第一网络，所述第二网络为所述终端设备的服务网络，所述第二ECS、所述第二EES分别对应所述第二网络。
通过上述设计，当终端设备发生漫游，由第一网络切换到第二网络时，终端设备可成功获取第二网络对应的第二EES的信息。
在一种可能的设计中，还包括：所述第一设备向所述第一ECS发送以下信息中的一项或多项：所述终端设备在所述第二网络中的位置信息、所述终端设备的应用信息。
在一种可能的设计中，所述第二EES的信息中包括匹配所述第一请求信息的第二EES的地址信息；所述第一设备接收第二EES的信息，包括：所述第一设备接收来自所述第一ECS的第二EES的地址信息，或者第二EES的标识信息等。
在一种可能的设计中，还包括：所述第一设备接收来自所述第一ECS的用于访问所述第二EES的安全凭证。
在一种可能的设计中，所述第二EES的信息用于指示存在匹配所述第一请求信息的第二EES；所述第一设备接收第二EES的信息，包括：所述第一设备接收来自所述第一ECS的所述第二ECS的信息所述第一设备向所述第二ECS发送第二请求信息，所述第二请求信息用于请求所述第二EES的信息；所述终端设备接收来自所述第二ECS的所述第二EES的信息，所述第二EES的信息中包括匹配所述第一请求信息的第二EES的地址信息或第二EES的标识信息。
在一种可能的设计中，还包括：所述第一设备接收来自所述第一ECS的用于访问所述第二ECS的安全凭证。
在一种可能的设计中，所述第二EES的信息用于指示不存在匹配所述第一请求信息的第二EES，所述方法还包括：所述第一设备接收来自所述第一ECS的第一信息，所述第一信息用于应用的接入点的获取。
在一种可能的设计中，所述第一设备为第一EES，所述方法还包括：所述第一EES接收来自所述终端设备的第三请求信息，所述第三请求信息中包括所述第二网络的PLMN标识。
第三方面，提供一种通信方法，该方法的执行主体为第二ECS，可以理解的是，第二ECS可以为第二ECS，或者可以为配置于第二ECS中的部件(例如，芯片、电路或其它等)，该方法包括：第二ECS接收来自第一ECS的第一请求信息，所述第一请求信息用于请求所述第二网络对应的第二边缘使能服务器EES的信息；所述第二ECS向所述第一ECS发送所述第二EES的信息；其中，所述第二ECS、所述第二EES分别对应于第二网络，所述第一ECS对应于第一网络，所述第一网络为终端设备的归属网络，所述第二网络为终端设备的服务网络。
在一种可能的设计中，所述第一请求信息中包括所述终端设备在第二网络中的位置信息、所述终端设备的应用信息中的一项或多项。
在一种可能的设计中，所述第二EES的信息中包括匹配所述第一请求信息的第二EES的地址信息或者第二EES的标识信息等。
在一种可能的设计中，还包括：所述第二ECS向所述第一ECS发送用于访问所述第二EES的安全凭证。
在一种可能的设计中，所述第二EES的信息用于指示是否存在匹配所述第一请求信息的第二EES。
在一种可能的设计中，还包括：所述第二ECS向所述第一ECS发送用于访问所述第二ECS的安全凭证。
在一种可能的设计中，所述第二EES的信息指示不存在匹配所述第一请求信息的第二EES，所述方法还包括：所述第二ECS向所述第一ECS发送第一信息，所述第一信息用于应用的接入点的获取。
第四方面，本申请实施例提供一种装置，有益效果可参见上述第一方面的描述。所述 装置具有实现上述第一方面的方法实施例中行为的功能。所述功能可以通过执行相应的硬件或软件实现。所述硬件或软件可包括一个或多个上述功能相对应的单元。在一种可能的设计中，该装置可包括：通信单元，用于接收来自第一设备的第二网络的公共陆地移动网络PLMN标识，所述第一设备包括终端设备或第一边缘使能服务器EES；处理单元，用于根据所述PLMN标识，向所述第二ECS发送第一请求信息，所述第一请求信息用于请求所述第二网络对应的第二EES的信息；通信单元，还用于接收来自所述第二ECS的所述第二EES的信息；其中，所述终端设备的归属网络为第一网络，所述第一ECS、所述第一EES分别对应所述第一网络，第二网络为所述终端设备的服务网络，所述第二ECS、所述第二EES分别对应所述第二网络。这些单元可以执行上述第一方面方法示例中的相应功能，具体参见方法示例中的详细描述，此处不做赘述。
第五方面，本申请实施例还提供一种装置，有益效果可参见第二方面的描述。所述装置具有实现上述第二方面的方法实施例中行为的功能。所述功能可以通过执行相应的硬件或软件实现。所述硬件或软件可包括一个或多个上述功能相对应的单元。在一种可能的设计中，该装置包括：通信单元，用于向第一边缘配置服务器ECS发送第二网络的公共陆地移动网络PLMN标识，所述PLMN标识用于第二ECS的信息的确认；通信单元，还用于接收第二边缘使能服务器EES的信息；其中，所述第一设备包括终端设备或第一EES，所述终端设备的归属网络为第一网络，所述第一EES、所述第一ECS分别对应所述第一网络，所述第二网络为所述终端设备的服务网络，所述第二ECS、所述第二EES分别对应所述第二网络。这些单元可以执行上述第二方面方法示例中的相应功能，具体参见方法示例中的详细描述，此处不做赘述。
第六方面，本申请实施例还提供一种装置，有益效果可参见第三方面的描述。所述装置具有实现上述第三方面的方法实施例中的行为的功能。所述功能可以通过执行相应的硬件或软件实现。所述硬件或软件可包括一个或多个上述功能相对应的单元。在一种可能的设计中，该装置包括：通信单元，用于接收来自第一ECS的第一请求信息，所述第一请求信息用于请求所述第二网络对应的第二边缘使能服务器EES的信息；通信单元，还用于向所述第一ECS发送所述第二EES的信息；其中，所述第二ECS、所述第二EES分别对应于第二网络，所述第一ECS对应于第一网络，所述第一网络为终端设备的归属网络，所述第二网络为终端设备的服务网络。这些单元可以执行上述第三方面方法示例中的相应功能，具体参见方法示例中的详细描述，此处不做赘述。
第七方面提供了一种装置，该装置可以为上述第一方面方法实施例中的第一ECS，或者为设置在第一ECS中的芯片。该装置包括通信接口以及处理器，可选的，还包括存储器。其中，该存储器用于存储计算机程序或指令，处理器与存储器、通信接口耦合，当处理器执行所述计算机程序或指令时，使装置执行上述第一方面方法实施例中由第一ECS所执行的方法。
第八方面，提供了一种装置，该装置可以为上述第二方面方法实施例中的第一设备，或者为设置在第一设备中的芯片。该装置包括通信接口以及处理器，可选的，还包括存储器。其中，该存储器用于存储计算机程序或指令，处理器与存储器、通信接口耦合，当处理器执行所述计算机程序或指令时，使装置执行上述第二方面方法实施例中由第一设备所执行的方法。
第九方面，提供了一种装置，该装置可以为上述第三方面方法实施例中的第二ECS， 或者为设置在第二ECS中的芯片。该装置包括通信接口以及处理器，可选的，还包括存储器。其中，该存储器用于存储计算机程序或指令，处理器与存储器、通信接口耦合，当处理器执行所述计算机程序或指令时，使装置执行上述第三方面方法实施例中由第二ECS所执行的方法。
第十方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码并运行时，使得上述第一方面中由第一ECS执行的方法被执行。
第十一方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码被运行时，使得上述第二方面中由第一设备执行的方法被执行。
第十二方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码被运行时，使得上述第三方面中由第二ECS执行的方法被执行。
第十三方面，本申请提供了一种芯片系统，该芯片系统包括处理器，用于实现上述第一方面的方法中第一ECS的功能。在一种可能的设计中，所述芯片系统还包括存储器，用于保存程序指令和/或数据。该芯片系统，可以由芯片构成，也可以包括芯片和其他分立器件。
第十四方面，本申请提供了一种芯片系统，该芯片系统包括处理器，用于实现上述第二方面的方法中第一设备的功能。在一种可能的设计中，所述芯片系统还包括存储器，用于保存程序指令和/或数据。该芯片系统，可以由芯片构成，也可以包括芯片和其他分立器件。
第十五方面，本申请提供了一种芯片系统，该芯片系统包括处理器，用于实现上述第三方面的方法中第二ECS的功能。在一种可能的设计中，所述芯片系统还包括存储器，用于保存程序指令和/或数据。该芯片系统，可以由芯片构成，也可以包括芯片和其他分立器件。
第十六方面，本申请提供了一种计算机可读存储介质，该计算机可读存储介质存储有计算机程序，当该计算机程序被运行时，实现上述第一方面中由第一ECS执行的方法。
第十七方面，本申请提供了一种计算机可读存储介质，该计算机可读存储介质存储有计算机程序，当该计算机程序被运行时，实现上述第二方面中由第一设备执行的方法。
第十八方面，本申请提供了一种计算机可读存储介质，该计算机可读存储介质存储有计算机程序，当该计算机程序被运行时，实现上述第三方面中由第二ECS执行的方法。
附图说明
图1为本申请实施例提供的MEC网络的架构；
图2为本申请实施例提供的无线网络的架构；
图3为本申请实施例提供的PLMN网络与EDN网络的示意图；
图4为本申请实施例一提供的通信方法的流程图；
图5为本申请实施例二提供的通信方法的流程图；
图6为本申请实施例三提供的通信方法的流程图；
图7为本申请实施例四提供的通信方法的流程图；
图8为本申请实施例提供的装置的一结构示意图；
图9为本申请实施例提供的装置的另一结构示意图。
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。其中，在本申请的描述中，除非另有说明，“/”表示前后关联的对象是一种“或”的关系，例如，A/B可以表示A或B；本申请中的“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，其中A,B可以是单数或者复数。并且，在本申请的描述中，除非另有说明，“多个”是指两个或多于两个。“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。另外，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”等字样对功能和作用基本相同的相同项或相似项进行区分。本领域技术人员可以理解“第一”、“第二”等字样并不对数量和执行次序进行限定，并且“第一”、“第二”等字样也并不限定一定不同。
此外，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。
参照图1，在第三代合作伙伴计划(3rd generation partnership project，3GPP)的SA6的多接入边缘计算(multi-accEES edge computing，MEC)研究中，定义了如下架构模型：
边缘数据网络(edge data network，EDN)，一种理解为，EDN只对应一个数据网络，是一个特别的本地数据网络(local，data network，DN)，包含边缘使能功能，可以使用数据网络接入标识符(DN accEES identifier，DNAI)和数据网络标识(data network name，DNN)标识，是网络逻辑概念。另一种理解为，EDN是中心云的对等概念，可以理解为是一个本地的数据中心(地理位置概念)，可以使用DNAI来标识，可以包含多个本地数据网络(local DN)。以华为手机中的“应用市场”应用程序为例，在深圳总部可以设置一个“应用市场”的中心云。为了方便北京和上海的用户使用，北京和上海可分别设置一个“应用市场”的本地EDN网络。后续，北京的用户可通过北京设置的“应用市场”的本地EDN网络，来获取应用服务。而上海用户可通过上海设置的“应用市场”的本地EDN网络，来获取应用服务，各EDN网络就近为各用户提供应用服务，可给用户提供更高质量的网络体验。
应用实例或边缘应用，部署在EDN中的应用称为应用实例。具体是指一个服务器应用程序，例如社交媒体软件、增强现实(augmented reality，AR)、虚拟现实(virtual reality，VR)部署运行在EDN中的实例(instance)。一个应用可以在一个或多个EDN中部署一个或多个边缘应用服务器(edge application server，EAS)，部署运行在不同的EDN中的EAS可以认为是一个应用的不同EAS，它们可以共享一个域名，可以使用一个任播IP地址，也可以使用不同的IP地址等，不作限定。EAS还称为应用实例、边缘应用实例、MEC应用服务器、EAS功能等。
边缘应用客户端(edge application client，EAC)，是EAS在终端设备侧的对等实体。EAC用于应用用户从EAS中获取应用业务。EAC是应用在终端侧的客户端程序，EAC可以连接到中心云上的EAS获取应用业务，也可以连接到部署运行在一个或多个EDN中的EAS以获取业务应用。
边缘使能服务器(edge enabler server，EES)，可以为部署在EDN中的实例提供使能能力，可以更好的支持应用在MEC的部署情况。例如，EES可以支持边缘应用的注册，对终端设备的认证和鉴权，为终端设备提供应用实例的IP地址信息等。进一步的，EES还可支持获取应用实例的标识和IP地址信息，并将应用实例的标识和IP地址信息发送给ECS。EES部署在EDN中。一般情况下，EAS注册到一个EES上，或者，通过管理系统将一个EAS的信息配置在一个EES上，该EES称为该EAS关联的EES，EES可以控制、管理、注册或配置在该EES关联的EAS等。
边缘使能客户端(edge enabler client，EEC)，是EES在终端设备侧的对等实体。EEC用于向EES注册EEC的信息及应用客户端的信息、执行安全认证和鉴权、从EES获取EAS的IP地址、向应用客户端提供边缘计算使能能力，如EAS发现服务，将EAS的IP地址返回给应用客户端。
边缘配置服务器(edge configuration server，ECS)，负责EDN的配置，如向终端设备提供EES的信息。还可以向终端设备提供应用实例的信息，以及和应用的DNS交互获取应用实例的信息。进一步，还可以从其他功能实体获取并保存应用实例和IP地址的信息等。
其中，应用用户可以与应用的提供商签订服务协议，从而为应用用户提供服务，而应用用户通过登录终端设备上的应用客户端，通过应用客户端与EAS连接进行通信。使能客户端(例如，EEC)可以为中间件层，一般位于操作系统中，或者位于应用客户端与操作系统中间，也可以实现在应用客户端内部。应用客户端可以以应用编程接口(appilcation program interface，API)的方式从使能客户端获取边缘使能服务。
如图2所示，3GPP标准TS 23.501中定义的网络架构如下，包括：无线接入网络(radio accEES network，RAN)和核心网。不同接入网设备之间可通过Xn接口连接，接入网设备与核心网之间可通过NG接口连接。
RAN用于实现无线接入有关的功能，例如RAN可以为终端设备提供无线资源管理、服务质量管理、数据加密和压缩等功能。示例地，接入网设备可以包括以下几种类型：
1、下一代节点(next generation nodeB，gNB)，为终端设备提供新无线(new radio，NR)的控制面和/或用户面的协议和功能，并且接入到核心网。例如，5G核心网(5th generation core，5GC)。
2、下一代演进型节点(next generation evolved Node B，ng-eNB)，为终端设备提供演进的通用陆地无线接入(evolved universal terrestrial radio accEES，E-UTRA)的控制面和/或用户面的协议和功能，并且接入到核心网。例如，5GC等。
可选的，接入网设备可以由集中式单元(central unit，CU)和分布式单元(distributed unit，DU)构成，即可对原接入网设备的功能进行拆分，将原接入网设备的部分功能部置在CU，剩余的部分功能部署在DU，多个DU共用一个CU，节省成本，易于网络扩展。CU和DU之间可通过FI接口连接。CU可以代表接入网设备通过NG接口与核心网相连，CU还可以代表接入网设备通过Xn接口和其它接入网设备相连。更进一步的，CU的功能还可被划分为：
1、集中单元-控制平面(central unit–control plane，CU-CP)：主要包括了CU中的RRC层，以及PDCP层中的控制面；
2、集中单元-用户平面(central unit–user plane，CU-UP)：主要包括了CU中的SDAP层，以及PDCP层中的用户面。
核心网主要用于对终端设备进行管理，并提供与外网通信的功能。核心网设备可包括以下中的一个或多个网元：
用户面功能(user plane function，UPF)网元：主要负责用户数据的转发和接收。在下行传输中，UPF网元可以从数据网络(data network，DN)接收用户数据，通过接入网设备传输给终端设备；在上行传输中，UPF网元可以通过接入网设备从终端设备接收用户数据，向DN转发该用户数据。可选的，UPF网元中为终端设备提供服务的传输资源和调度功能可以由SMF网元管理控制。
接入和移动管理功能(accEES and mobility management function，AMF)网元：主要负责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。
会话管理功能(sEESion management function，SMF)网元：主要负责移动网络中的会话管理，如会话建立、修改、释放。具体功能如为用户分配IP地址、选择提供报文转发功能的UPF网元等。
策略控制功能(policy control function，PCF)网元：主要支持提供统一的策略框架来控制网络行为，提供策略规则给控制层网络功能，同时负责获取与策略决策相关的用户签约信息。
应用功能(application function，AF)网元：主要支持与3GPP核心网交互来提供服务，例如影响数据路由决策，策略控制功能或者向网络侧提供第三方的一些服务。
统一数据管理(unified data management，UDM)网元：主要用于生成认证信任状，用户标识处理(如存储和管理用户永久身份等)，接入授权控制和签约数据管理等。
需要说明的是，在不同的通信系统中，上述核心网中的网元可以有不同的名称。在上述图1所示的示意图中，是以第五代移动通信系统为例进行说明的，并不作为对本申请的限定。
可选的，图1所示的网络架构中，还可包括：终端设备。终端设备可以简称为终端，是一种具有无线收发功能的设备，终端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)。所述终端设备可以是手机、平板电脑、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、无人驾驶中的无线终端设备、远程医疗中的无线终端设备、智能电网中的无线终端设备、运输安全中的无线终端设备、智慧城市中的无线终端设备、或智慧家庭中的无线终端设备等。终端设备还可以是蜂窝电话、无绳电话、会话启动协议(sEESion initiation protocol，SIP)电话、无线本地环路(wirelEES local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，未来第五代(the 5th generation，5G)网络中的终端设备或者未来演进的公用陆地移动通信网络(public land mobile network，PLMN)中的终端设备等。终端设备有时也可以称为用户设备(user equipment，UE)、接入终端设备、车载终端设备、工业控制终端设备、UE单元、UE站、移动站、移动台、远方站、远程终端设备、移动设备、无线通信设备、UE代理或UE装置等。终端设备也可以是固定的或者移动的。本申请实施例对此并不限定。
可选的，图1所示的网络架构中，还可包括：数据网络(data network，DN)。DN可以是为用户提供数据传输服务的网络。例如，DN可以是IP多媒体业务(IP multi-media  service)网络或互联网络。DN中可包括多个应用服务器。其中，终端设备可以建立从终端设备到DN的协议数据单元(protocol data unit，PDU)会话，来访问DN。其中，一个数据网络可以有一个或多个本地数据网络(local data network，Local DN)，这些本地数据网络为靠近用户附着点(point of attachment)的数据网络接入点(accEES point)。
在本申请实施例中，上述图1所示架构中的ECS、EES和EAS可以配置于上述一个或多个DN中。或者，可描述为，上述DN中包括一个或多个EDN，每个EDN包括EES和EAS，还可以包含ECS。除此之外，上述DN中还可配置有应用中心云平台。应用中心云平台与上述EAS可以认为是对等的概念。每个EAS可以就近为用户提供应用服务，而应用中心云平台可以为所有用户提供应用服务。应用中心云平台，还可称为中心云平台。在以下描述中，以中心云平台为例进行描述。以“华为音乐”客户端为例说明，说明EDN网络与中心云平台的关系：在深圳总部可以设置一个关于“华为音乐”的中心云平台，该中心云平台可以为全球用户的“华为音乐”客户端提供服务。同时为了方便给北京和上海的用户提供音乐服务，可以分别在北京地区和上海地区的EDN网络部署华为音乐的EAS。此后，北京地区的用户，可访问北京对应的EDN网络中的华为音乐的EAS，以获取华为音乐服务。而上海地区的用户，可以访问上海对应的EDN网络中的华为音乐的EAS，以获取华为音乐服务。进一步，当北京地区或上海地区的EDN网络故障，或者对应的华为音乐EAS出现问题，如过载等，或者，不能提供某些特定的服务时，北京地区或上海地区的用户，可访问位于深圳地区的华为音乐的中心云平台，以获取相应音乐服务。
进一步，在本申请实施例中，一个EDN网络对应于一个PLMN网络，不同的PLMN网络可对应于一个或多个EDN网络。例如，如图3所示，PLMN网络A对应于EDN1，PLMN网络B对应于EDN2。其中，EDN1中包括第一EAS和第一EES，还可以包括第一ECS。EDN2中包括第二EAS和第二EES，还可以包括第二ECS。其中，当终端设备发生漫游，由PLMN网络A漫游到PLMN网络B，如何为终端设备确定上述PLMN网络B所对应的第二EES，是本申请实施例待解决的技术问题。
为了便于理解，首先对下述实施例中所涉及的场景进行说明，在以下描述中：第一网络可以为终端设备的归属(home)网，可简称为H网络，第二网络可以为终端设备的拜访(Visted)网络，可简称为V网络，或者，称为服务网络。终端设备可由第一网络漫游到第二网络。
其中，第一ECS对应于第一网络，还可以描述为：第一ECS部署在第一网络中，或者第一ECS是与第一网络关联的ECS，或者第一ECS是第一网络所属运营商的ECS等。第一EES对应于第一网络，还可描述为：第一EES部署在第一网络的边缘，或者第一EES可以归属于第一网络运营商，或者第一EES是和第一网络的运营商签约的EES。第一EAS对应于第一网络，还可描述为：第一EAS部署在第一网络的边缘。
第二ECS对应于第二网络，还可以描述为：第二ECS部署在第二网络中，或者第二ECS是与第二网络关联的ECS，或者第二ECS是第二网络所属运营商的ECS等。第二EES对应于第二网络，还可描述为：第二EES部署在第二网络的边缘，或者第二EES可以是归属于第二网络运营商，或者第二EES是和第二网络的运营商签约的EES。第二EAS对应于第二网络，还可描述为：第二EAS部署在第二网络的边缘等。
除此之外，在下述描述中，第二ECS的信息可包括第二ECS的地址信息，或第二ECS的标识信息。在以下描述，第二ECS的信息、第二ECS的地址信息、第二ECS的标识信 息，三者之间不作区分，可相互替换。
此外，在下述描述中，第二EES的信息可包括第二EES的标识信息，或者第二EES的地址信息。
本申请实施例提供一种通信方法，可解决上述当终端设备发生漫游，由第一网络切换到第二网络时，如何确定第二网络对应的EDN网络中的EES的技术问题，该方法包括：第一ECS接收来自第一设备的第二网络的PLMN标识，第一设备可以是终端设备或第一EES等。第一ECS根据第二网络的PLMN标识，向第二ECS发送第一请求信息，第一请求信息用于请求所述第二网络对应的第二EES的信息。第二ECS在接收到第一请求信息后，向第一ECS发送第二EES的信息。
可选的，该方法还包括：第一ECS根据第二网络的PLMN标识确定第二ECS的信息。之后，第一ECS根据第二ECS的信息，向第二ECS发送上述第一请求信息。
可选的，该方法还包括：第二ECS根据第一请求信息确定第二EES的信息。例如，第二ECS根据第一请求信息确定第二EES的地址信息或者第二EES的标识信息；或者，第二ECS根据第一请求信息确定是否有匹配第一请求信息的第二EES。
例如，第二ECS根据第一请求信息确定第二EES的信息，可以包括如下几种情况中的任一种：
(1)第二ECS根据第一请求信息中的应用信息，检索第二网络对应的EES信息。当第二网络对应的EES的信息中包含该应用的信息(即第二网络对应的EES中注册了该应用，或第二网络对应的EES中上线(onboard)或实例化了该应用)，则第二ECS确定存在匹配第一请求信息的第二EES。
(2)第二ECS根据第一请求信息中的位置信息，检索第二网络对应的EES的信息。当第二网络对应的EES的服务区域(或最佳服务区域)与位置信息匹配，则第二ECS确定存在匹配第一请求信息的第二EES。例如，EES的服务区域或最佳服务区域可以为服务区域(service area)对应的一组小区标识或追踪区标识或一组DNAI列表。例如，上述匹配可以理解为：位置信息位于第二网络对应的EES的服务区域或与之有重叠的区域等。
(3)第二ECS根据第一请求信息中的位置信息和应用信息，检索第二网络对应的EES的信息。当第二网络对应的EES的服务区域与位置信息匹配，并且，当第二网络对应的EES的信息中包含该应用的信息，则第二ECS确定存在匹配第一请求信息的第二EES。
可选的，第一请求信息包括终端设备在第二网络中的位置信息、终端设备的应用信息中的一项或多项。例如，终端设备在第二网络中的位置信息包括终端设备在第二网络中的小区信息cell ID或追踪区信息(tracking area information，TAI)等；终端设备的应用信息表示来自UE的应用信息，这些应用信息可以是安装在UE上的应用、UE正在启动运行的应用、UE即将访问的应用、UE感兴趣的应用等。UE的应用信息包括应用的标识或应用客户端的标识，应用的标识用来唯一标识一个应用(application)，例如完全限定域名(fully qualified domain name，FQDN)，EAS ID，统一资源定位符(uniform resource locator，URL)等，客户端的标识用来标识一个应用的在UE上的客户端，例如应用客户端的包名(package name)，操作系统标识和应用标识(OSId和APPId)，UE的应用信息还可以包括应用提供商(application provider)、应用的类型(application category或application type)，如车联网应用，应用描述(application description)、应用特征(application characteristics)、应用运行的地理位置(geographical area of operation)、应用对应的时延(latency)、应用对应的带宽 (bandwidth)、应用对应的服务连续性需求(service continuity requirement)。应用的信息还可以是三元组、DNN、或DNN和切片信息的组合。在一种可能的实现方案中，当第一设备由第一网络漫游到第二网络时，第一设备可自己确定上述第二网络对应的第二ECS的信息，然后自己向第二ECS请求合适的第二EES的信息。如此，当第一设备发生移动，漫游到多个地区时，需要分别感知上述多个地区的网络所对应的ECS的地址信息，和多个ECS交互进行鉴权授权，由此对第一设备的要求较高，第一设备的边缘业务访问授权鉴权复杂，不易控制，实现逻辑复杂。而在本申请实施例中，当第一设备由第一网络漫游到第二网络时，第一网络对应的第一ECS通过与第二网络对应的第二ECS进行交互，可获取第二EES的信息，且将第二EES的信息发送给第一设备。如此，第一设备无需自己感知第二ECS的信息，从而可解决对第一设备的要求较高，第一设备的边缘业务访问授权鉴权复杂，不易控制，实现逻辑复杂等问题。
可选的，第一ECS可向第一设备发送第二EES的信息。在一种可能的实现方式中，上述第二EES的信息可包括第二EES的地址信息或第二EES的标识信息。若第二ECS确定存在匹配第一请求信息的第二EES，可将第二EES的地址信息或第二EES的标识信息返回第一ECS。可选的，第一ECS将第二EES的地址信息或第二EES的标识信息，发送给第一设备。
或者，在另一种可能的实现方式中，上述第二EES的信息可用于指示是否存在匹配第一请求信息的第二EES的指示信息，且将上述用于指示是否存在匹配第一请求信息的第二EES的信息，返回第一ECS。可选的，在存在匹配第一请求信息的第二EES时，第一ECS将第二ECS的信息，返回给第一设备。第一设备向第二ECS请求第二EES的信息。或者，可选的，在不存在匹配第一请求信息的第二EES时，第一ECS将第一信息，返回给第一设备，第一信息可用于应用的接入点的获取。例如，上述第一信息可为中心云平台的信息，或者，中心云平台DNS服务器的信息等。上述第一信息可为第一ECS预配置的，或者第一ECS从第二ECS获取的。
以下分四个实施例，分别介绍本申请实施例的方案。其中，实施例一和实施例二以第一设备为终端设备为例进行说明。且实施例一和实施例二的区别在于，在实施例一中，第二ECS在存在匹配第一请求信息的第二EES之后，向第一ECS返回匹配第一请求信息的第二EES的地址信息或第二EES的标识信息。在实施例二中，第二ECS向第一ECS返回是否存在匹配第一请求信息的第二EES的指示信息。且如果存在匹配第一请求信息的第二EES，则第一ECS向终端设备返回第二ECS的信息。终端设备根据上述第二ECS的信息，向第二ECS请求第二EES的信息，这样可避免EES的拓扑结构泄露。实施例三和实施例四以第一设备为第一EES为例。实施例三和实施例四的区别，与上述实施例一和实施例二的区别相似，不再一一说明。
实施例一
在本申请实施例中，第一ECS可接收来自终端设备的第二网络的PLMN标识，所述第二网络可以为PLMN网络。第一ECS可根据第二网络的PLMN标识，确定第二ECS的信息。之后，第一ECS向第二ECS发送第一请求信息。第二ECS在接收到所述第一请求信息后，可确定是否存在匹配第一请求信息的第二EES；如果存在，将第二EES的地址信息或第二EES的标识信息，发送给第一ECS，第一ECS再将第二EES的地址信息或第二 EES的标识信息发送给终端设备。如果不存在，则第二ECS可向第一ECS发送第一信息，所述第一信息可用于应用的接入点的获取。例如，上述第一信息可为中心云平台的信息，或中心云平台的DNS服务器信息。或者，第二ECS可不返回任何信息等，不作限定。第一ECS向终端设备发送第一信息。当上述第二ECS返回第一信息时，上述第一信息可以从第二ECS获取的，而当上述第二ECS不返回第一信息时，上述第一信息可为第一ECS本地匹配等，不作限定。
如图4所示，提供实施例一的具体流程，在该流程中以终端设备为UE，第一网络为归属(home)网络(简称H网络)，第二网络为拜访(visited)网络(简称V网络)，第一ECS、第一EAS分别为H-ECS和H-EAS，第二ECS、第二EES、第二EAS分别为V-ECS、V-EES和V-EAS为例进行描述，包括但不限于：
可选的，步骤500，UE接入到V网络。
步骤501，UE向H-ECS发送第一请求信息，上述第一请求信息用于请求EES的信息。可选的，第一请求信息可以通过配置请求provision request消息来发送。
可选的，上述第一请求信息中可包括以下至少一项：V网络的PLMN ID；UE在V网络中的位置，UE的应用信息。
可选的，步骤502，H-ECS根据V网络的PLMN ID，确定V-ECS的信息。该V-ECS的信息可以是预配置在H-ECS中的，或者，是由H-ECS根据PLMN ID推演出来的。例如，该V-ECS的信息可以为V-ECS的地址信息或者V-ECS的标识信息。
例如，H-ECS中可配置有PLMN ID与ECS信息的映射表，则H-ECS根据上述V网络的PLMN ID，在上述映射表中，查找出上述V网络的PLMN对应的ECS信息，即V-ECS的信息。或者，H-ECS可根据PLMN ID推演出V-ECS的信息。例如，利用某推演公式，输入PLMN ID即可得到ECS的信息等。
步骤503a，H-ECS向V-ECS发送第二请求信息，用于请求第二网络对应的V-EES的信息。可选的，上述第二请求信息可以通过配置请求provision request，或者，EES请求EES request，或者，EES可用请求EES Availability request等消息发送。上述第二请求信息中可包括应用信息，位置信息等中的一项或多项。
在一种可能的实现方式中，如果H-ECS同一时刻或同一时间窗内收到一个或多个UE的请求信息，即上述第一请求信息，则H-ECS可以聚合多个UE的请求信息中的应用信息发送给V-ECS，聚合多个UE的请求信息中的UE的位置信息发送给V-ECS。因此，上述第二请求信息中的应用信息可以包含一个或多个UE的应用信息，上述第二请求信息中的位置信息可以包含该一个或多个UE的位置信息，不作限定。
步骤503b，V-ECS向H-ECS发送V-EES的信息，或者，第一信息。例如，V-EES的信息或第一信息可以通过第一响应消息发送。所述第一信息可以是中心云平台的信息，或云平台DNS服务的信息。
可选的，上述第一响应信息可以是配置响应provision response，或者，EES响应EES response，或者，EES可用响应EES Availability response等消息，不作限定。
例如，V-EES的信息可参考上述第二EES的信息的描述。V-EES的信息可包括V-EES的地址信息或V-EES的标识信息，或者，V-EES的信息可用于指示是否存在匹配第一请求信息的V-EES的指示信息。该云平台的信息或云平台DNS服务器信息可以用于UE获取UE要访问的应用的接入点(endpoint)信息，例如提供部署在云上的应用服务器的IP地址。 上述云平台DNS服务器可认为是一个集中式的DNS服务器等。
其中，V-ECS可根据上述步骤503a中的第二请求信息，确定是否存在匹配第二请求信息的V-EES。如果存在匹配第二请求信息的V-EES，则上述第一响应信息可包括匹配第二请求信息的V-EES的信息。可选的，上述V-EES的信息可以是EES配置profile，或裁剪过的EES配置profile，其中可包括V-EES的地址信息或V-EES的标识信息，例如end point的地址，V-EES支持的应用信息，例如，应用标识，V-EES对应的数据网络名称，例如DNN等。进一步，若上述V-EES与特定切片关联，则上述V-EES的信息中还可包括其对应的切片信息等。可选的，上述第一响应信息中还可包括访问V-EES的安全凭证。
或者，若不存在匹配第二请求信息的V-EES，则上述第一响应信息中可携带不存在匹配第二请求信息的V-EES的指示信息等。或者，上述第一响应中可包括第一信息，第一信息可以是云平台的信息，或云平台DNS服务器的信息。
其中，V-ECS根据第二请求信息确定V-EES的信息的方式，可参考上述第二ECS根据第一请求信息确定第二EES的信息的描述，此处不再赘述。
步骤504，H-ECS向UE返回V-EES的信息，或者第一信息等，所述V-EES的信息可以为V-EES的地址信息或V-EES的标识信息。可选的，上述V-EES的信息，或者，第一信息可以是通过第二响应信息发送，第二响应信息可以是配置响应provision response等。
在一种可能的实现方式中，若存在匹配第二请求信息的V-EES，则上述第二响应信息中可携带V-EES的信息，该V-EES的信息中至少包括V-EES的地址信息或V-EES的标识信息，关于V-EES的信息中包括的具体内容，可参见上述记载。进一步，上述第二响应消息中还可携带用于访问V-EES的安全凭证。或者，若不存在匹配第二请求信息的V-EES，则上述第二响应信息中可携带不存在匹配第二请求信息的V-EES的指示信息，或者，携带云平台的信息，或云平台DNS服务器的信息。所述云平台的信息，或云平台DNS服务器的信息可以是从V-ECS中获得的，也可以是预配置在H-ECS中的，不作限定。
可选的，若UE接收到上述H-ECS返回的V-EES的信息，则执行步骤505，EEC向V-EES发起EAS发现请求流程，以获取应用的EAS的信息。
可选的，步骤505，UE可向V-EES发送EAS发现请求，所述EAS发送请求中携带访问V-EES的安全凭证，V-EES可根据安全凭证，对UE进行认证和授权，认证和授权通过后，则向UE返回EAS发现响应，上述EAS发现响应中携带有在V网络的注册在V-EES的应用实例的信息，即注册在V-EES中的EAS的信息。
在本申请实施例中，当UE注册到拜访网络后，仍然连接到Home网络获取拜访网络的EES的信息，使得UE只需与Home网络的ECS建立连接就可以获取到拜访网络的EES，简化了UE在漫游场景下发现拜访网络的EES的信令逻辑。
实施例二
在本申请实施例中，第一ECS可接收来自终端设备的第二网络的PLMN标识。第一ECS可根据第二网络的PLMN标识，确定第二ECS的信息。之后，第一ECS向第二ECS发送第一请求信息。第二ECS在接收到第一请求信息后，可确定是否存在匹配第一请求信息的第二EES；如果存在，第二ECS向第一ECS发送存在匹配第一请求信息的第二EES的指示信息，否则，第二ECS向第一ECS发送不存在匹配第一请求信息的第二EES的指示信息。而第一ECS在接收到存在匹配第一请求信息的第二EES的指示信息之后，可向 终端设备发送第二ECS的信息。之后，终端设备可根据上述第二ECS的信息，向第二ECS请求第二EES的信息。
如图5所示，提供实施例二的流程，在该流程中以终端设备为UE，第一网络为归属(home)网络(简称H网络)，第二网络为拜访(visited)网络(简称V网络)，第一ECS、第一EAS分别为H-ECS和H-EAS，第二ECS、第二EES、第二EAS分别为V-ECS、V-EES和V-EAS为例进行描述，包括但不限于：
可选的，步骤600，UE接入到V网络。
步骤601，UE向H-ECS发送第一请求信息，第一请求信息用于请求EES的信息。该第一请求信息中可携带有V网络的PLMN ID，UE在V网络中的位置，UE的应用信息等中的一项或多项。可选的，第一请求信息可以通过配置请求provision request等消息发送。
可选的，步骤602，H-ECS根据V网络的PLMN标识，确定V-ECS的信息。例如，该V-ECS的信息可以为V-ECS的地址信息或者V-ECS的标识信息。具体确定V-ECS的方式参考步骤502的描述，不再赘述。
步骤603a，H-ECS向V-ECS发送第二请求信息，该第二请求信息用于请求匹配第二请求信息的V-EES，或者，描述为，第二请求信息用于向V-ECS问询是否存在符合第二请求信息的V-EES。上述第二请求信息中可包括应用信息、位置信息等。可选的，上述第二请求信息可以通过配置请求provision request，或者，EES请求EES request，或者，EES可用请求EES Availability request等消息发送。
其中，步骤600-603a可参考图4中步骤500-503a的描述，此处不再赘述。
步骤603b，V-ECS根据上述第二请求信息，向H-ECS发送是否存在匹配第二请求信息的V-EES的指示信息。V-ECS对于确定是否存在匹配第二请求信息的V-EES的判断方式参考步骤503b中的记载。可选的，上述是否存在匹配第二请求信息的V-EES的指示信息可以通过第一响应信息发送。第一响应信息可以是配置响应provision response，或者，EES响应EES response，或者，EES可用响应EES Availability response等。
在一种可能的实现方式中，若存在匹配第二请求信息的V-EES，则上述第一响应信息中可携带有匹配第二请求信息的V-EES的指示信息。若不存在匹配第二请求信息的V-EES，则上述第一响应信息中可包括不匹配第二请求信息的V-EES的指示信息，或者，返回云平台的信息或云平台DNS服务器信息等。可选的，可用二进制比特1表示存在符合第二请求信息的V-EES的指示信息，可用二进制比特0表示不存在符合第二请求信息的V-EES的指示信息等。
步骤604，H-ECS向UE返回V-ECS的信息，或者第一信息。所述V-ECS的信息可以是V-ECS的地址信息，或者V-ECS的标识信息。所述第一信息可以中心云平台的信息，或者中心云平台DNS服务器的信息。可选的，所述V-EES的信息，或者第一信息可以通过第二响应信息发送。可选的，第二响应信息可以为配置响应provision response消息。
在一种可能的实现方式中，若上述第一响应信息中包括用于指示存在匹配第二请求信息的V-EES的指示信息，则上述第二响应信息中可包括上述V-ECS的地址信息。可选的，该第二响应信息中还可包括用于访问V-ECS的安全凭证。
在另一种可能的实现方式中，若上述第一响应信息中包括用于指示不存在匹配第二请求信息的V-EES的指示信息，或者，上述第一响应信息中包括中心云平台的信息，或云平台DNS服务器的信息等，则上述第二响应信息可包括无符合请求的EES的指示信息(如 失败指示)，或包括云平台的信息或云平台DN服务器信息等。所述云平台的信息，或云平台DNS服务器的信息可以是上述第一响应信息中携带的，即V-ECS返回的。或者，可以为H-ECS本地配置的等，不作限定。
可选的，若上述第二响应信息中携带有V-ECS的地址信息，则UE可自己连接V-ECS并向V-ECS获取V-EES的信息，执行下述步骤605a和步骤605b的步骤。若上述第二响应信息中携带有中心云平台或云平台DNS服务器的信息，则UE可以从云中心云平台或云平台DNS服务器中获取相应应用的服务器的信息。
可选的，步骤605a，UE向V-ECS发送第三请求信息，用于获取V网络对应的V-EES的信息。上述第三请求信息中可以包括UE的应用信息，UE在V网络的位置信息等。可选的，上述第三请求信息可通过配置请求provision request等消息发送。上述第三请求信息中还可携带用于访问V-ECS的安全凭证。
可选的，步骤605b，V-ECS根据安全凭证对UE进行认证和授权，认证和授权通过后，V-ECS根据UE的位置信息，或/或，应用信息等，查找匹配第三请求信息的V-EES，查找成功后向EEC返回V网络对应的V-EES的信息，即V-ECS向UE返回V-EES的信息，V-EES的信息可通过第三响应信息发送，第三响应消息可以是配置响应provision response等。
上述实施例一与实施例二的描述可相互参见。在上述实施例二中，UE从H-ECS获取V-ECS的地址信息，并直接从V-ECS获取V-EES的信息，该方案使得UE可以发现V-EES的同时，也保护V网络的EES的拓扑信息。
实施例三
在本申请实施例中，第一ECS可接收来自第一EES的第二网络的PLMN标识。第一ECS可根据第二网络的PLMN标识，确定第二ECS的信息。之后，第一ECS向第二ECS发送第一请求信息。第二ECS在接收到第一请求信息后，可确定是否存在匹配第一请求信息的第二EES；如果存在，将第二EES的地址信息或第二EES的标识信息，发送给第一ECS，第一ECS再将第二EES的地址信息或第二EES的标识信息发送给第一EES。如果不存在，则第二ECS可向第一ECS发送第一信息，该第一信息可用于应用的接入点的获取。而第一ECS向第一EES发送第一信息。上述第一信息可以从第二ECS获取的，或者，第一ECS本地匹配等，不作限定。
如图6所示，提供实施例三的具体流程。该流程中，以终端设备为UE，第一网络为归属(home)网络(简称H网络)，第二网络为拜访(visited)网络(简称V网络)，第一EES、第一ECS、第一EAS分别为S-EES、H-ECS、H-EAS，第二EES、第二ECS、第二EAS分别为V-EES、V-ECS、V-EAS为例进行描述，包括但不限于：
可选的，步骤700，UE注册到V网络。
可选的，步骤701，UE连接到归属网络对应的S-EES，并向S-EES发送第一请求信息，第一请求信息可通过连接请求等消息发送。该第一请求信息中包括V网络的PLMN ID，或者，UE在V网络中的位置，例如，UE在V网络中的小区ID等。可选的，上述第一请求信息中还可包括UE的IP地址等。其中S-EES为当前服务于终端设备的应用客户端连接的EAS对应的EES。终端设备的不同应用客户端连接的不同EAS可由不同的EES提供服务。
可选的，步骤702，S-EES检测到UE移动到V网络。例如，S-EES接收到用户面路 径管理事件(UP path management event)通知，该通知中包括目标DNAI，以及UE新的IP地址。S-EES可根据UE的PLMN ID变化，或者，目标DNAI指示对应于V网络，或者，UE的IP地址发生变化，确定当前S-EES不是最优的EES，S-EES触发应用迁移。
步骤703，S-EES连接到其对应的归属网络对应的ECS，即H-ECS，并向H-ECS发送第二请求信息，用于请求EES的信息。可选的，第二请求信息可以通过配置请求provision request消息发送。该第二请求信息中可以携带UE的应用信息，UE在V网络中的位置，V网络的PLMN ID、UE的IP地址等中的一项或多项。
可选的，步骤704，H-ECS根据V网络的PLMN ID，获取V-ECS的信息。例如，V-ECS的信息可以是V-ECS的地址信息，或者V-ECS的标识信息等。该地址可以是预配置在H-ECS中的，或者，是由H-ECS根据PLMN ID推演出来的。具体确定V-ECS的方式参考步骤502的描述，不再赘述。步骤705a，H-ECS向V-ECS发送第三请求信息，用于请求第二网络对应的V-EES。该第三请求信息中可包括位置信息，应用信息等。上述第三请求信息可以通过配置请求provision request，或者，EES请求EES request，或者，EES可用请求EES Availability request等消息发送，不作限定。
步骤705b，V-ECS向H-ECS发送V-EES的信息，或者，第一信息。V-EES的信息可以是V-EES的标识信息，或者,V-EES的地址信息等。第一信息可以是中心云平台的信息，或者中心云平台DNS服务器的信息等。所述V-EES的信息或第一信息可通过第一响应信息发送。可选的，第一响应信息可以是配置响应provision response，或者，EES响应EES response，或者，EES可用响应EES Availability response等，不作限定。
其中，V-ECS可根据上述步骤705a中的第三请求信息，确定是否存在匹配第三请求信息的V-EES。如果存在匹配第三请求信息的V-EES，则上述第一响应信息可包括匹配第三请求信息的V-EES的信息。可选的，上述V-EES的信息可以是EES配置profile，或裁剪过的EES配置profile，其中可包括V-EES的地址信息，例如end point的地址，V-EES支持的应用信息，例如，应用标识，V-EES对应的数据网络名称，例如DNN等。进一步，若上述V-EES是切片的V-EES，则上述V-EES的信息中还可包括其对应的切片信息等。可选的，上述第一响应信息中还可包括访问V-EES的安全凭证。
或者，若不存在匹配第三请求信息的V-EES，则上述第一响应信息中可携带不存在匹配第三请求信息的V-EES的指示信息等。或者，上述第一响应中还可包括云平台的信息，或云平台DNS服务器的信息。
步骤706，H-ECS向S-EES发送V-EES的信息，或者，第一信息。上述V-EES的信息，或者第一信息，可通过第二响应信息发送。可选的，第二响应信息可以为配置响应provision response等消息。
在一种可能的实现方式中，若存在匹配第三请求信息的V-EES，则上述第二响应信息中可携带V-EES的信息。或者，若不存在匹配第三请求信息的V-EES，则上述第二响应信息中可携带不存在匹配第三请求信息的V-EES的指示信息，或者，携带云平台的信息，或者云平台DNS服务器的信息。所述云平台的信息，或云平台DNS服务器的信息可以是从V-ECS中获得的，也可心以是预配置在H-ECS中的，不作限定。
可选的，若上述第二响应消息中包括匹配第三请求信息的V-EES的信息，则执行下述步骤707。
可选的，步骤707，S-EES向V-EES发送应用上下文迁移请求，以使得UE的应用上 下文从H-EAS切换到V-EAS。
可选的，上述上下文迁移请求中可携带UE的应用信息和UE的位置信息。可选的，还可携带安全凭证。V-EES可根据上述安全凭证和S-EES的请求，认证和授权通过后，处理S-EES的上下文请求信息，以实现H-EAS和V-EAS的IP地址交换，完成UE的应用上下文迁移，将UE的应用上下文从H-EAS迁移到V-EAS。
在本申请实施例中，当UE注册到V网络之后，仍然可以连接到S-EES和H-EAS。S-EES根据UE的PLMN ID发生变化，或者，UE的IP地址发生变化，判断UE已经移动到V网络，当前的H-EAS或S-EES已经不再是最合适的EAS或EES了，H-ECS作为EES的代理和V-ECS变互，获取V-EES的信息，进而减少了V网络对外交互的接口。
上述流程主要描述了UE在移动并注册到V网络时，UE仍然可以连接到归属网络的S-EES，并向S-EES上报自己的PLMN ID。当然，S-EES还可通过其它方法检测到UE移动并注册到V网络，进而触发应用的上下文迁移，找到V网络中的V-EES，实现UE的应用上下文迁移，保证UE的业务体验和业务连续性。
实施例四
在本申请实施例中，第一ECS可接收来自第一EES的第二网络的PLMN标识。第一ECS可根据第二网络的PLMN标识，确定第二ECS的信息。之后，第一ECS向第二ECS发送第一请求信息。第二ECS在接收到第一请求信息后，可确定是否存在匹配第一请求信息的第二EES；如果存在，第二ECS向第一ECS发送匹配第一请求信息的第二EES的指示信息，否则，第二ECS向第一ECS发送不存在匹配第一请求信息的第二EES的指示信息。而第一ECS在接收到存在匹配第一请求信息的第二EES的指示信息之后，可向第一EES发送第二ECS的信息。之后，第一EES可自己向第二ECS请求第二EES的信息。
如图7所示，提供实施例四的具体流程，该流程中，以终端设备为UE，第一网络为归属(home)网络，第二网络为拜访(visited)网络(简称V网络)，第一EES、第一ECS、第一EAS分别为S-EES、H-ECS、H-EAS，第二EES、第二ECS、第二EAS分别为V-EES、V-ECS、V-EAS为例进行描述，包括但不限于：
可选的，步骤800，UE注册到V网络。
可选的，步骤801，UE连接到位于归属网络的S-EES，并向S-EES发送第一请求信息，第一请求信息还可称为连接请求，该第一请求信息中可包括V网络的PLMN ID，或者，UE在V网络中的位置信息等中的一项或多项。可选的，上述第一请求信息中还可包括UE的IP地址等。
可选的，步骤802，S-EES检测到UE移动到V网络。
步骤803，S-EES连接到其对应的归属网络的ECS，即H-ECS，并向H-ECS发送第二请求信息，用于请求EES的信息。该第二请求信息中可以携带UE的应用信息，UE在V网络中的位置，V网络的PLMN ID、UE的IP地址等中的一项或多项。可选的，第二请求信息可以通过配置请求provision request等消息发送。
可选的，步骤804，H-ECS根据V网络的PLMN ID，获取V-ECS的信息。例如，V-ECS的信息可以为V-ECS的标识信息，或者V-ECS的地址信息。
步骤805a，H-ECS向V-ECS发送第三请求信息，用于请求第二网络对应V-EES。该第二请求信息中可包括位置信息，应用信息等中的一项或多项。上述第三请求信息可以通 过配置请求provision request，或者，EES请求EES request，或者，EES可用请求EES Availability request等消息发送，不作限定。
步骤805b，V-ECS向H-ECS发送是否存在匹配第三请求信息的V-EES的指示信息。上述是否存在匹配第三请求信息的V-EES的指示信息可以通过第一响应信息发送，第一响应消息可以是配置响应provision response，或者，EES响应EES response，或者，EES可用响应EES Availability response等，不作限定。
可选的，V-ECS可根据上述步骤805a中的第三请求信息，确定是否存在匹配第三请求信息的V-EES。如果存在匹配第三请求信息的V-EES，则上述第一响应信息中可携带存在匹配第三请求信息的V-EES的指示信息，例如，该指示信息可用比特1表示等。如果不存在匹配第三请求信息的V-EES的信息，则上述第一响应信息中可携带不存在匹配第三请求信息的V-EES的指示信息，例如，该指示信息可用比特0表示等，或者，上述第一响应信息中可携带中心云平台的信息，或中心云平台DNS服务的信息等。
步骤806，H-ECS向S-EES发送V-ECS的信息，或者第一信息等。可选的,V-ECS的信息可以是V-ECS的地址信息，或者V-ECS的标识信息。上述第一信息可以是中心云平台的信息，或者中心云平台DNS服务器的信息等。上述V-ECS的地址信息，或者第一信息可以通过第二响应信息发送。可选的，第二响应信息可以为配置响应provision response消息等。
在一种可能的实现方式中，若上述第一响应信息中携带有存在匹配第三请求信息的V-EES的指示信息时，则上述第二响应信息中可携带V-ECS的地址信息。
在另一种可能的实现方式中，若上述第一响应信息中没有携带存在匹配第三请求信息的V-EES的指示信息，或者，携带有中心云平台的信息或中心云平台的DNS服务器的信息，则上述第二响应信息中可携带中心云平台的信息，或云平台DNS服务器的信息等。该中心云平台的信息，或云平台DNS服务器的信息，可以是从V-ECS获取的，或者，可以是预先配置在H-ECS中的。
可选的，步骤807a，S-EES向V-ECS发送第四请求信息，该第四请求信息可以通过配置请求provision request等发送，该第四请求信息用于获取V网络对应的EES信息。该第四请求信息中可携带有UE的应用信息、UE在V网络中的位置信息、访问V-ECS的安全凭证等。
可选的，步骤807b，V-ECS向S-EES发送V-EES的信息。该V-EES的信息可以通过第四响应信息发送，该第四响应信息可以是配置响应provision response消息。该第四响应信息中包括V-EES的信息。可选的，第四响应信息中还可包括访问V-EES的安全凭证。
可选的，步骤808，S-EES发起应用上下文迁移，将UE的应用上下文从H-EAS迁移到V-EAS。
在上述实施例中，UE在注册到V网络之后，仍然可以连接到归属网络的S-EES和H-EAS。H-WWS可根据UE的PLMN ID发生变化，或者，IP地址发生变化，确定UE已经移动到V网络，当前的归属网络的H-EAS或S-EES已经不再是最适合的EAS和EES了。H-ECS和V-ECS交互，确认V-ECS有满足应用和位置信息的V-EES之后，S-EES才向V-ECS请求满足应用和位置信息的V-EES，从而确保请求的有效性，实现用户业务的连续性。
以上结合图1至图7详细说明了本申请实施例所提供的方法，以下结合图8和图9详 细说明本申请实施例所提供的装置。应理解，装置实施例的描述与方法实施例的描述相互对应。因此，未详细描述的内容可参见上文方法实施例中的描述。
图8为本申请实施例提供的装置900的示意性框图，用于实现上述方法中第一ECS、第一设备或第二ECS的功能。例如，该装置可以是软件单元或芯片系统。所述芯片系统可以由芯片构成，也可以包括芯片和其它分立器件。该装置包括通信单元901，还可包括处理单元902。通信单元901，可以与外部进行通信。处理单元902，用于进行处理。通信单元901，还可以称为通信接口、收发单元、输入\输出接口等。
在一种示例中，装置900可实现对应于上文方法实施例中第一ECS执行的步骤，所述装置900可以是第一ECS，或者配置于第一ECS中的芯片或电路。通信单元901执行上文方法实施例中第一ECS的收发操作，处理单元902用于执行上文方法实施例中第一ECS的处理相关操作。
例如，通信单元901，用于接收来自第一设备的第二网络的公共陆地移动网络PLMN标识，所述第一设备包括终端设备或第一EES；处理单元902，用于根据所述PLMN标识，向所述第二ECS发送第一请求信息，所述第一请求信息用于请求所述第二网络对应的第二EES的信息；通信单元901，还用于接收来自所述第二ECS的所述第二EES的信息；
其中，所述终端设备的归属网络为第一网络，所述第一ECS、所述第一EES分别对应所述第一网络，第二网络为所述终端设备的服务网络，所述第二ECS、所述第二EES分别对应所述第二网络。
可选的，通信单元901，还用于接收来自所述第一设备的所述终端设备在所述第二网络中的位置信息、所述终端设备的应用信息中的一项或多项。
可选的，所述第一请求信息包括所述终端设备在所述第二网络中的位置信息、所述终端设备的应用信息中的一项或多项。
可选的，所述第二EES的信息中包括匹配所述第一请求信息的第二EES的地址信息或第二EES的标识信息，通信单元901，还用于向所述第一设备发送所述第二EES的信息。
可选的，通信单元901，还用于接收来自所述第二ECS的用于访问所述第二EES的安全凭证，以及向所述第一设备发送所述第二EES的安全凭证。
可选的，所述第二EES的信息用于指示存在匹配所述第一请求信息的第二EES，通信单元901，还用于向所述第一设备发送所述第二ECS的信息。
可选的，通信单元901，还用于接收来自所述第二ECS的用于访问所述第二ECS的安全凭证，以及向所述第一设备发送所述第二ECS的安全凭证。
可选的，所述第二EES的信息用于指示不存在匹配所述第一请求信息的第二EES，通信单元901，还用于向所述第一设备发送第一信息，所述第一信息是从所述第二ECS获取的或者本地配置的，所述第一信息用于应用的接入点的获取。
在一种示例中，装置900可实现对应于上文方法实施例中第一设备执行的步骤，所述装置900可以是第一设备，或者配置于第一设备中的芯片或电路。通信单元901执行上文方法实施例中第一设备的收发操作，处理单元902用于执行上文方法实施例中第一设备的处理相关操作。
例如，通信单元901，用于向第一ECS发送第二网络的公共陆地移动网络PLMN标识，所述PLMN标识用于第二ECS的信息的确认；通信单元901，还用于接收第二EES的信息；其中，所述第一设备包括终端设备或第一EES，所述终端设备的归属网络为第一网络， 所述第一EES、所述第一ECS分别对应所述第一网络，所述第二网络为所述终端设备的服务网络，所述第二ECS、所述第二EES分别对应所述第二网络。
可选的，通信单元901，还用于向所述第一ECS发送以下信息中的一项或多项：所述终端设备在所述第二网络中的位置信息、所述终端设备的应用信息。
可选的，所述第二EES的信息中包括匹配所述第一请求信息的第二EES的地址信息或第二EES的标识信息；
所述接收第二EES的信息，包括：接收来自所述第一ECS的所述第二EES的信息。
可选的，通信单元901，还用于接收来自所述第一ECS的用于访问所述第二EES的安全凭证。
可选的，所述第二EES的信息用于指示存在匹配所述第一请求信息的第二EES，所述接收第二EES的信息，包括：接收来自所述第一ECS的所述第二ECS的信息；向所述第二ECS发送第二请求信息，所述第二请求信息用于请求所述第二EES的信息；接收来自所述第二ECS的所述第二EES的信息，所述第二EES的信息中包括匹配所述第一请求信息的第二EES的地址信息或第二EES的标识信息。
可选的，通信单元901，还用于：接收来自所述第一ECS的用于访问所述第二ECS的安全凭证。
可选的，所述第二EES的信息用于指示不存在匹配所述第一请求信息的第二EES，通信单元901，还用于：接收来自所述第一ECS的第一信息，所述第一信息用于应用的接入点的获取。
可选的，所述第一设备为第一EES，通信单元901，还用于：接收来自所述终端设备的第三请求信息，所述第三请求信息中包括所述第二网络的PLMN标识。
在一种示例中，装置900可实现对应于上文方法实施例中第二ECS执行的步骤，所述装置900可以是第二ECS，或者配置于第二ECS中的芯片或电路。通信单元901执行上文方法实施例中第二ECS的收发操作，处理单元902用于执行上文方法实施例中第二ECS的处理相关操作。
例如，通信单元901，用于接收来自第一ECS的第一请求信息，所述第一请求信息用于请求所述第二网络对应的第二边缘使能服务器EES的信息；通信单元901，还用于向所述第一ECS发送所述第二EES的信息；其中，所述第二ECS、所述第二EES分别对应于第二网络，所述第一ECS对应于第一网络，所述第一网络为终端设备的归属网络，所述第二网络为终端设备的服务网络。
可选的，所述第一请求信息中包括所述终端设备在第二网络中的位置信息、所述终端设备的应用信息中的一项或多项。
可选的，所述第二EES的信息中包括匹配所述第一请求信息的第二EES的地址信息或第二EES的标识信息。
可选的，通信单元901，还用于向所述第一ECS发送用于访问所述第二EES的安全凭证。
可选的，所述第二EES的信息用于指示是否存在匹配所述第一请求信息的第二EES。
可选的，通信单元901，还用于向所述第一ECS发送用于访问所述第二ECS的安全凭证。
可选的，所述第二EES的信息指示不存在匹配所述第一请求信息的第二EES，通信单 元901，还用于向所述第一ECS发送第一信息，所述第一信息用于应用的接入点的获取。
应理解以上装置中单元的划分仅仅是一种逻辑功能的划分，实际实现时可以全部或部分集中到一个物理实体上，也可以物理上分开。且装置中的单元可以全部以软件通过处理元件调用的形式实现；也可以全部以硬件的形式实现；还可以部分单元以软件通过处理元件调用的形式实现，部分单元以硬件的形式实现。例如，各个单元可以为单独独立的处理元件，也可以集成在装置的某一个芯片中实现。此处，也可以以程序的形式存储于存储器中，由装置的某一个处理元件调用并执行该单元的功能。此处这些单元全部或部分可以集成在一起，也可以独立实现。这里所述的处理元件又可以称为处理器，可以是一种具有信号的处理能力的集成电路。在实现过程中，上述方法的各步骤或以上各个单元可以通过处理器元件中的硬件的集成逻辑电路实现或者以软件通过处理元件调用的形式实现。
在一个例子中，以上任一装置中的单元可以是被配置成实施以上方法的一个或多个集成电路，例如：一个或多个特定集成电路(Application Specific Integrated Circuit，ASIC)，或，一个或多个微处理器(digital singnal processor，DSP)，或，一个或者多个现场可编程门阵列(Field Programmable Gate Array，FPGA)，或这些集成电路形式中至少两种的组合。再如，当装置中的单元可以通过处理元件调度程序的形式实现时，该处理元件可以是通用处理器，例如中央处理器(Central Processing Unit，CPU)或其它可以调用程序的处理器。再如，这些单元可以集成在一起，以片上系统(system-on-a-chip，SOC)的形式实现。
以上用于接收的单元是一种该装置的接口电路，用于从其它装置接收信号。例如，当该装置以芯片的方式实现时，该接收单元是该芯片用于从其它芯片或装置接收信号的接口电路。以上用于发送的单元是一种该装置的接口电路，用于向其它装置发送信号。例如，当该装置以芯片的方式实现时，该发送单元是该芯片用于向其它芯片或装置发送信号的接口电路。
图9是本申请实施例提供的装置1000的示意性框图，图9所示的装置1000可以为图8所示的装置的一种硬件电路的实现方式。该装置可适用上文方法实施例中的流程中，执行上文方法实施例中第一ECS、第一设备或第二ECS的功能。为了便于说明，图9仅示出该通信装置的主要部件。
图9所示的通信装置1000包括至少一个处理器1001。通信装置1000还可以包括至少一个存储器1002，用于存储程序指令和/或数据。存储器1002和处理器1001耦合。本申请实施例中的耦合是装置、单元或模块之间的间接耦合或通信连接，可以是电性、机械性或其它的形式，用于装置、单元或模块之间的信息交互。处理器1001可以和存储器1002协同操作，处理器1001可以执行存储器1002中存储的程序指令，所述至少一个存储器中1002中的至少一个可以包括于处理器1001中。
装置1000还可以包括通信接口1003，用于通过传输介质和其它设备进行通信，从而用于通信装置1000可以和其它设备进行通信。在本申请实施例中，通信接口可以是收发器、电路、总线、模块或其它类型的通信接口。在本申请实施例中，通信接口为收发器时，收发器可以包括独立的接收器、独立的发射器；也可以集成收发功能的收发器、或者是接口电路。
应理解，本申请实施例中不限定上述处理器1001、存储器1002以及通信接口1003之间的连接介质。本申请实施例在图9中以存储器1002、处理器1001以及通信接口1003之间通过通信总线1004连接，总线在图9中以粗线表示，其它部件之间的连接方式，仅是 示意性说明，并不作为限定。所述总线可以包括地址总线、数据总线、控制总线等。为了便于表示，图9中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线等。
在一种示例中，装置1000用于实现上文方法实施例中第一ECS执行的步骤。通信接口1003用于执行上文实施例中第一ECS的收发相关操作，处理器1001用于执行上文方法实施例中第一ECS的处理相关操作。
例如，通信接口1003，用于接收来自第一设备的第二网络的公共陆地移动网络PLMN标识，所述第一设备包括终端设备或第一EES；处理器1001，用于根据所述PLMN标识，向所述第二ECS发送第一请求信息，所述第一请求信息用于请求所述第二网络对应的第二EES的信息；通信接口1003，还用于接收来自所述第二ECS的所述第二EES的信息；
其中，所述终端设备的归属网络为第一网络，所述第一ECS、所述第一EES分别对应所述第一网络，第二网络为所述终端设备的服务网络，所述第二ECS、所述第二EES分别对应所述第二网络。
可选的，通信接口1003，还用于接收来自所述第一设备的所述终端设备在所述第二网络中的位置信息、所述终端设备的应用信息中的一项或多项。
可选的，所述第一请求信息包括所述终端设备在所述第二网络中的位置信息、所述终端设备的应用信息中的一项或多项。
可选的，所述第二EES的信息中包括匹配所述第一请求信息的第二EES的地址信息或第二EES的标识信息，通信接口1003，还用于向所述第一设备发送所述第二EES的信息。
可选的，通信接口1003，还用于接收来自所述第二ECS的用于访问所述第二EES的安全凭证，以及向所述第一设备发送所述第二EES的安全凭证。
可选的，所述第二EES的信息用于指示存在匹配所述第一请求信息的第二EES，通信接口1003，还用于向所述第一设备发送所述第二ECS的信息。
可选的，通信接口1003，还用于接收来自所述第二ECS的用于访问所述第二ECS的安全凭证，以及向所述第一设备发送所述第二ECS的安全凭证。
可选的，所述第二EES的信息用于指示不存在匹配所述第一请求信息的第二EES，通信接口1003，还用于向所述第一设备发送第一信息，所述第一信息是从所述第二ECS获取的或者本地配置的，所述第一信息用于应用的接入点的获取。
在一种示例中，装置1000用于实现上文方法实施例中第一设备执行的步骤。通信接口1003用于执行上文实施例中第一设备的收发相关操作，处理器1001用于执行上文方法实施例中第一设备的处理相关操作。
例如，通信接口1003，用于向第一ECS发送第二网络的公共陆地移动网络PLMN标识，所述PLMN标识用于第二ECS的信息的确认；通信接口1003，还用于接收第二EES的信息；其中，所述第一设备包括终端设备或第一EES，所述终端设备的归属网络为第一网络，所述第一EES、所述第一ECS分别对应所述第一网络，所述第二网络为所述终端设备的服务网络，所述第二ECS、所述第二EES分别对应所述第二网络。
可选的，通信接口1003，还用于向所述第一ECS发送以下信息中的一项或多项：所述终端设备在所述第二网络中的位置信息、所述终端设备的应用信息。
可选的，所述第二EES的信息中包括匹配所述第一请求信息的第二EES的地址信息或第二EES的标识信息；
所述接收第二EES的信息，包括：接收来自所述第一ECS的所述第二EES的信息。
可选的，通信接口1003，还用于接收来自所述第一ECS的用于访问所述第二EES的安全凭证。
可选的，所述第二EES的信息用于指示存在匹配所述第一请求信息的第二EES，所述接收第二EES的信息，包括：接收来自所述第一ECS的所述第二ECS的信息；向所述第二ECS发送第二请求信息，所述第二请求信息用于请求所述第二EES的信息；接收来自所述第二ECS的所述第二EES的信息，所述第二EES的信息中包括匹配所述第一请求信息的第二EES的地址信息或第二EES的标识信息。
可选的，通信接口1003，还用于：接收来自所述第一ECS的用于访问所述第二ECS的安全凭证。
可选的，所述第二EES的信息用于指示不存在匹配所述第一请求信息的第二EES，通信接口1003，还用于：接收来自所述第一ECS的第一信息，所述第一信息用于应用的接入点的获取。
可选的，所述第一设备为第一EES，通信接口1003，还用于：接收来自所述终端设备的第三请求信息，所述第三请求信息中包括所述第二网络的PLMN标识。
在一种示例中，装置1000用于实现上文方法实施例中第二ECS执行的步骤。通信接口1003用于执行上文方法实施例中第二ECS的收发相关操作，处理器1001用于执行上文方法实施例中第二ECS的处理相关操作。
例如，通信接口1003，用于接收来自第一ECS的第一请求信息，所述第一请求信息用于请求所述第二网络对应的第二边缘使能服务器EES的信息；通信接口1003，还用于向所述第一ECS发送所述第二EES的信息；其中，所述第二ECS、所述第二EES分别对应于第二网络，所述第一ECS对应于第一网络，所述第一网络为终端设备的归属网络，所述第二网络为终端设备的服务网络。
可选的，所述第一请求信息中包括所述终端设备在第二网络中的位置信息、所述终端设备的应用信息中的一项或多项。
可选的，所述第二EES的信息中包括匹配所述第一请求信息的第二EES的地址信息或第二EES的标识信息。
可选的，通信接口1003，还用于向所述第一ECS发送用于访问所述第二EES的安全凭证。
可选的，所述第二EES的信息用于指示是否存在匹配所述第一请求信息的第二EES。
可选的，通信接口1003，还用于向所述第一ECS发送用于访问所述第二ECS的安全凭证。
可选的，所述第二EES的信息指示不存在匹配所述第一请求信息的第二EES，通信接口1003，还用于向所述第一ECS发送第一信息，所述第一信息用于应用的接入点的获取。
进一步的，本申请实施例还提供一种装置，所述装置用于执行上文方法实施例中的方法。一种计算机可读存储介质，包括程序，当所述程序被处理器运行时，上文方法实施例中的方法被执行。一种计算机程序产品，所述计算机程序产品包括计算机程序代码，当所述计算机程序代码在计算机上运行时，使得计算机实现上文方法实施例中的方法。一种芯片，包括：处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得装置执行上文方法实施例中的方法。
本申请实施例中，处理器可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列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处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。
在本申请实施例中，存储器可以是非易失性存储器，比如硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)等，还可以是易失性存储器(volatile memory)，例如随机存取存储器(random-access memory，RAM)。存储器是能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。本申请实施例中的存储器还可以是电路或者其它任意能够实现存储功能的装置，用于存储程序指令和/或数据。
本申请实施例提供的方法中，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指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本发明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、用户设备或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，简称DSL))或无线(例如红外、无线、微波等)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可以存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、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)、光介质(例如，数字视频光盘(digital video disc，简称DVD))、或者半导体介质(例如,SSD)等。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (26)

  1. 一种通信方法，其特征在于，包括：
    第一边缘配置服务器ECS接收来自第一设备的第二网络的公共陆地移动网络PLMN标识，所述第一设备包括终端设备或第一边缘使能服务器EES；
    所述第一ECS根据所述PLMN标识，向所述第二ECS发送第一请求信息，所述第一请求信息用于请求所述第二网络对应的第二EES的信息；
    所述第一ECS接收来自所述第二ECS的所述第二EES的信息；
    其中，所述终端设备的归属网络为第一网络，所述第一ECS、所述第一EES分别对应所述第一网络，第二网络为所述终端设备的服务网络，所述第二ECS、所述第二EES分别对应所述第二网络。
  2. 如权利要求1所述的方法，其特征在于，还包括：
    所述第一ECS接收来自所述第一设备的所述终端设备在所述第二网络中的位置信息、所述终端设备的应用信息中的一项或多项。
  3. 如权利要求1或2所述的方法，其特征在于，所述第一请求信息包括所述终端设备在所述第二网络中的位置信息、所述终端设备的应用信息中的一项或多项。
  4. 如权利要求1至3中任一项所述的方法，其特征在于，所述第二EES的信息中包括匹配所述第一请求信息的第二EES的地址信息，所述方法还包括：
    所述第一ECS向所述第一设备发送所述第二EES的信息。
  5. 如权利要求4所述的方法，其特征在于，还包括：
    所述第一ECS接收来自所述第二ECS的用于访问所述第二EES的安全凭证；
    所述第一ECS向所述第一设备发送所述第二EES的安全凭证。
  6. 如权利要求1至3中任一项所述的方法，其特征在于，所述第二EES的信息用于指示存在匹配所述第一请求信息的第二EES，所述方法还包括：
    所述第一ECS向所述第一设备发送所述第二ECS的信息。
  7. 如权利要求6所述的方法，其特征在于，还包括：
    所述第一ECS接收来自所述第二ECS的用于访问所述第二ECS的安全凭证；
    所述第一ECS向所述第一设备发送所述第二ECS的安全凭证。
  8. 如权利要求1至3中任一项所述的方法，其特征在于，所述第二EES的信息用于指示不存在匹配所述第一请求信息的第二EES，所述方法还包括：
    所述第一ECS向所述第一设备发送第一信息，所述第一信息是从所述第二ECS获取的或者本地配置的，所述第一信息用于应用的接入点的获取。
  9. 一种通信方法，其特征在于，包括：
    第一设备向第一边缘配置服务器ECS发送第二网络的公共陆地移动网络PLMN标识，所述PLMN标识用于第二ECS的信息的确认；
    所述第一设备接收第二边缘使能服务器EES的信息；
    其中，所述第一设备包括终端设备或第一EES，所述终端设备的归属网络为第一网络，所述第一EES、所述第一ECS分别对应所述第一网络，所述第二网络为所述终端设备的服务网络，所述第二ECS、所述第二EES分别对应所述第二网络。
  10. 如权利要求9所述的方法，其特征在于，还包括：
    所述第一设备向所述第一ECS发送以下信息中的一项或多项：所述终端设备在所述第二网络中的位置信息、所述终端设备的应用信息。
  11. 如权利要求9或10所述的方法，其特征在于，所述第二EES的信息中包括匹配所述第一请求信息的第二EES的地址信息；所述第一设备接收第二EES的信息，包括：
    所述第一设备接收来自所述第一ECS的所述第二EES的信息。
  12. 如权利要求11所述的方法，其特征在于，还包括：
    所述第一设备接收来自所述第一ECS的用于访问所述第二EES的安全凭证。
  13. 如权利要求9或10所述的方法，其特征在于，所述第二EES的信息用于指示存在匹配所述第一请求信息的第二EES；所述第一设备接收第二EES的信息，包括：
    所述第一设备接收来自所述第一ECS的所述第二ECS的信息；
    所述第一设备向所述第二ECS发送第二请求信息，所述第二请求信息用于请求所述第二EES的信息；
    所述终端设备接收来自所述第二ECS的所述第二EES的信息，所述第二EES的信息中包括匹配所述第一请求信息的第二EES的地址信息。
  14. 如权利要求13所述的方法，其特征在于，还包括：
    所述第一设备接收来自所述第一ECS的用于访问所述第二ECS的安全凭证。
  15. 如权利要求9或10所述的方法，其特征在于，所述第二EES的信息用于指示不存在匹配所述第一请求信息的第二EES，所述方法还包括：
    所述第一设备接收来自所述第一ECS的第一信息，所述第一信息用于应用的接入点的获取。
  16. 如权利要求9至15中任一项所述的方法，其特征在于，所述第一设备为第一EES，所述方法还包括：
    所述第一EES接收来自所述终端设备的第三请求信息，所述第三请求信息中包括所述第二网络的PLMN标识。
  17. 一种通信方法，其特征在于，包括：
    第二边缘配置服务器ECS接收来自第一ECS的第一请求信息，所述第一请求信息用于请求所述第二网络对应的第二边缘使能服务器EES的信息；
    所述第二ECS向所述第一ECS发送所述第二EES的信息；
    其中，所述第二ECS、所述第二EES分别对应于第二网络，所述第一ECS对应于第一网络，所述第一网络为终端设备的归属网络，所述第二网络为终端设备的服务网络。
  18. 如权利要求17所述的方法，其特征在于，所述第一请求信息中包括所述终端设备在第二网络中的位置信息、所述终端设备的应用信息中的一项或多项。
  19. 如权利要求17或18所述的方法，其特征在于，所述第二EES的信息中包括匹配所述第一请求信息的第二EES的地址信息。
  20. 如权利要求19所述的方法，其特征在于，还包括：
    所述第二ECS向所述第一ECS发送用于访问所述第二EES的安全凭证。
  21. 如权利要求17或18所述的方法，其特征在于，所述第二EES的信息用于指示是否存在匹配所述第一请求信息的第二EES。
  22. 如权利要求21所述的方法，其特征在于，还包括：
    所述第二ECS向所述第一ECS发送用于访问所述第二ECS的安全凭证。
  23. 如权利要求17或18所述的方法，其特征在于，所述第二EES的信息指示不存在匹配所述第一请求信息的第二EES，所述方法还包括：
    所述第二ECS向所述第一ECS发送第一信息，所述第一信息用于应用的接入点的获取。
  24. 一种装置，其特征在于，包括用于执行权利要求1至8任一项所述的方法的各步骤的单元，或者，包括用于执行权利要求9至16任一项所述的方法的各步骤的单元，或者，包括用于执行权利要求17至23中任一项所述的方法的各步骤的单元。
  25. 一种装置，其特征在于，包括处理器，所述处理器与至少一个存储器耦合，所述处理器用于读取所述至少一个存储器所存储的计算机程序，以执行如权利要求1至8中任一项所述的方法，或者，执行权利要求9至16中任一项所述的方法，或者，执行权利要求17至23中任一项所述的方法。
  26. 一种计算机可读存储介质，其特征在于，包括程序，当所述程序被处理器运行时，如权利要求1至8中任一项所述的方法被执行，或者，如权利要求9至16中任一项所述的方法被执行，或者，如权利要求17至23中任一项所述的方法被执行。
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