WO2020147760A1 - 一种局域网通信方法、装置及系统 - Google Patents

一种局域网通信方法、装置及系统 Download PDF

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Publication number
WO2020147760A1
WO2020147760A1 PCT/CN2020/072318 CN2020072318W WO2020147760A1 WO 2020147760 A1 WO2020147760 A1 WO 2020147760A1 CN 2020072318 W CN2020072318 W CN 2020072318W WO 2020147760 A1 WO2020147760 A1 WO 2020147760A1
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WIPO (PCT)
Prior art keywords
network
information
lan
network element
smf
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PCT/CN2020/072318
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English (en)
French (fr)
Inventor
朱强华
姚琦
朱奋勤
吴问付
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华为技术有限公司
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Publication of WO2020147760A1 publication Critical patent/WO2020147760A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • 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]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Definitions

  • This application relates to the field of communication technology, and in particular to a method, device and system for local area network communication.
  • the 5G local area network (LAN) service is a service provided by the 5G network, which can provide Internet Protocol (IP) type or non-IP type private for terminals (user equipment, UE) belonging to the same LAN group Communication.
  • IP Internet Protocol
  • UEs can join a LAN group based on service requirements or proprietary attributes, and UEs belonging to the LAN group can communicate using 5G LAN type services.
  • the 5GLAN type service can provide point-to-point data transmission between the UE and the UE. Before data transmission, it is necessary to establish an association between the protocol data unit (PDU) sessions of the two UEs.
  • PDU protocol data unit
  • the sessions of all UEs in the same LAN group connected to the 5GLAN are under the management and control of the same session management function (SMF) network element.
  • SMF session management function
  • the embodiments of the present application provide a local area network communication method, device and system for selecting SMF network elements for the UE when the UE initiates a PDU session.
  • an embodiment of the present application provides a local area network communication method.
  • the method includes the following steps: an access and mobility management function AMF network element receives a protocol data unit PDU session establishment request sent by a terminal.
  • the PDU session establishment request is Carrying the requested network information;
  • the AMF network element determines whether the network indicated by the requested network information supports LAN services; in the case that the network indicated by the requested network information supports LAN services, the The AMF network element obtains the SMF identifier for managing the PDU session according to the association relationship between the session management function SMF identifier and the information of the network and the information of the requested network.
  • the requested network information may include the data network name DNN; or, DNN and single network slice selection auxiliary information S-NSSAI.
  • the AMF network element determines whether the network indicated by the requested network information supports LAN services, it can obtain the SMF identifier according to the association relationship.
  • the SMF network element identified by the SMF identifier can be used to communicate to the terminals in the LAN group. PDU sessions initiated and used to establish LAN communications are managed. Since the association relationship is the association relationship between the SMF identifier and the information of the network, for all terminals in the LAN group, after the terminal initiates a PDU session establishment request, the AMF network element determines the SMF identifier according to the above association relationship, and thus is the LAN group Each terminal in the group selects the same SMF ID. In other words, with the above solution, when the terminal initiates a PDU session, the same SMF network element can be selected for session management for all terminals in the same LAN group.
  • the AMF network element can obtain the contract data of the terminal from the unified data management UDM network element, where the contract data of the terminal includes the association relationship.
  • the AMF network element obtains the contract data of the terminal from the unified data management UDM network element, specifically: the AMF network element obtains the contract data of the terminal from the unified data management UDM network element in the terminal registration process .
  • the AMF network element obtains the subscription data of the terminal from the unified data management UDM network element, specifically: the UDM network element receives a data update request from the application function NEF network element or the operation maintenance management OAM entity,
  • the data update request contains the LAN configuration parameters and the SMF identification.
  • the LAN configuration parameters contain the identification of the LAN, the information of the network corresponding to the LAN, and the member list corresponding to the LAN; the UDM network element associates the SMF identification with the information of the network corresponding to the LAN It is saved in the contract data of the terminal; the UDM network element sends the association relationship to the AMF network element; the AMF network element receives the association relationship.
  • the association relationship can be saved in the terminal's contract data through the above solution, and then sent through the UDM network element The process of signing data sends the association relationship to the AMF network element.
  • the AMF network element can determine whether the network indicated by the requested network information supports the LAN service by the following method: the requested network information includes whether the indicated network supports the LAN service One indication information; the AMF network element determines whether the network indicated by the requested network information supports LAN services according to the first indication information.
  • the AMF network element directly determines whether the network indicated by the requested network information supports LAN services according to the requested network information.
  • the AMF network element can determine whether the network indicated by the requested network information supports the LAN service by the following method: the AMF network element determines the requested network information according to the local configuration information. Whether the network supports LAN services; or, the AMF network element determines whether the network indicated by the requested network information supports LAN services according to the subscription data of the terminal; or, the PDU session establishment request also includes the network support indicated by the requested network information For the second indication information of the local area network service, the AMF network element determines, according to the second indication information, that the network indicated by the requested network information supports the local area network service.
  • the AMF network element determines whether the network indicated by the requested network information supports LAN services based on other information other than the requested network information.
  • an embodiment of the present application provides a local area network communication method, including: a UDM network element receives a data update request sent by an operation, maintenance and management OAM entity or a network open function NEF network element.
  • the data update request includes LAN configuration parameters and LAN configuration.
  • the parameters include the identification of the LAN, the information of the network corresponding to the LAN, and the member list corresponding to the LAN; the UDM network element saves the association relationship between the SMF identification and the information of the network corresponding to the LAN into the contract data of the terminal indicated by the member list corresponding to the LAN ;
  • the SMF network element corresponding to the SMF identifier is an SMF network element used to manage the PDU session of the terminal indicated by the member list corresponding to the LAN.
  • the UDM network element may also send a subscription data update notification to the AMF network element, and the subscription data update notification includes the association relationship.
  • the information of the network corresponding to the LAN may include the data network name DNN; or, the DNN and the single network slice selection auxiliary information S-NSSAI.
  • the UDM network element can configure the above-mentioned association relationship in the subscription data of the terminal through a data update request, and the AMF network element can obtain the SMF identifier according to the association relationship.
  • the SMF network element identified by the SMF identifier can be used to connect the LAN group.
  • the PDU session initiated by the terminal in the group and used to establish LAN communication is managed. Since the association relationship is the association relationship between the SMF identifier and the information of the network, for all terminals in the LAN group, after the terminal initiates a PDU session establishment request, the AMF network element determines the SMF identifier according to the above association relationship, and thus is the LAN group Each terminal in the group selects the same SMF ID. In other words, with the above solution, when the terminal initiates a PDU session, the same SMF network element can be selected for session management for all terminals in the same LAN group.
  • the data update request also includes the SMF identifier.
  • the SMF identifier may be the SMF identifier obtained by the NEF network element through the network function repository function NRF network element.
  • the UDM network element can directly determine the association relationship between the SMF identifier and the information of the network corresponding to the LAN. If the SMF identifier is not included in the data update request, the UDM network element can obtain the SMF identifier by querying the NRF network element, and then establish the association relationship.
  • an embodiment of the present application provides a local area network communication method.
  • the method includes the following steps: an NRF network element receives an SMF query request message sent by an AMF network element, and the SMF query request message is used to request to obtain a PDU session requested to establish a terminal
  • the SMF identification for management, the SMF query request message carries the information of the requested network
  • the NRF network element determines whether the network indicated by the requested network information supports LAN services; the situation where the network indicated by the requested network information supports LAN services
  • the NRF network element obtains the SMF identifier for managing the PDU session requested by the terminal according to the association relationship between the SMF identifier and the network information and the information of the requested network
  • the NRF network element sends an SMF query response message to the AMF network element, SMF The query response message carries the SMF identifier.
  • the information of the network corresponding to the LAN or the information of the requested network includes: DNN; or, DNN and S-NSSAI.
  • the NRF network element can obtain the SMF identifier according to the association relationship.
  • the SMF network element identified by the SMF identifier can be used to communicate to the terminals in the LAN group. PDU sessions initiated and used to establish LAN communications are managed. Since the association relationship is the association relationship between the SMF identifier and the information of the network, for all terminals in the LAN group, after the NRF network element receives the SMF query request message, the NRF network element determines the SMF identifier according to the above association relationship.
  • Each terminal in the LAN group selects the same SMF ID. In other words, with the above solution, when the terminal initiates a PDU session, the same SMF network element can be selected for session management for all terminals in the same LAN group.
  • the NRF network element before the NRF network element receives the SMF query request message sent by the AMF network element, it further includes: receiving the LAN configuration parameters sent by the NEF network element or the OAM entity, and the LAN configuration parameters include the information of the network corresponding to the LAN. Information; select the SMF for session management for the LAN; associate the SMF selected by the NRF with the information of the network corresponding to the LAN to obtain the association relationship.
  • the NRF network element obtains the LAN configuration parameters and SMF identifiers sent by the NEF network element or OAM entity.
  • the LAN configuration parameters include the information of the network corresponding to the LAN; therefore, the NRF can establish the SMF identifier and the LAN corresponding The relationship of network information.
  • the NRF network element determines whether the network indicated by the requested network information supports LAN services, which can be specifically implemented in the following manner: the requested network information includes the first indication information of whether the indicated network supports LAN services; NRF network The element determines whether the network indicated by the requested network information supports LAN services according to the first indication information.
  • the NRF network element directly determines whether the network indicated by the requested network information supports the local area network service according to the requested network information.
  • the NRF network element determines whether the network indicated by the requested network information supports LAN services, which can be specifically implemented in the following manner: The NRF network element determines whether the network indicated by the requested network information supports LAN services according to local configuration information.
  • the NRF network element determines whether the network indicated by the requested network information supports local area network services based on other information other than the requested network information.
  • an embodiment of the present application provides a local area network communication method.
  • the method includes the following steps: an AMF network element receives a PDU session establishment request sent by a terminal, and the PDU session establishment request carries information about the requested network; and an AMF network element determination request Whether the network indicated by the network information supports LAN services; in the case that the network indicated by the requested network information supports LAN services, the AMF network element sends an SMF query request message to the NRF network element, and the SMF query request message carries the request Network information and LAN indication information, which is used to indicate that the network indicated by the requested network information supports LAN services; the AMF network element receives the SMF query response message sent by the NRF network element, and the SMF query response message includes the terminal The SMF identifier for the management of the requested PDU session.
  • the requested network information includes DNN; or, DNN and S-NSSAI.
  • the AMF network element can send LAN indication information to the NRF network element.
  • the NRF network element determines that the network indicated by the requested network information supports LAN services, and then can obtain the SMF identifier according to the association relationship.
  • the SMF network element identified by the SMF identifier can be used to communicate to the terminals in the LAN group. PDU sessions initiated and used to establish LAN communications are managed.
  • the association relationship is the association relationship between the SMF identifier and the information of the network
  • the NRF network element determines the SMF identifier according to the above association relationship.
  • Each terminal in the LAN group selects the same SMF ID. In other words, with the above solution, when the terminal initiates a PDU session, the same SMF network element can be selected for session management for all terminals in the same LAN group.
  • the AMF network element determines whether the network indicated by the requested network information supports LAN services, which can be specifically implemented in the following manner: the requested network information includes first indication information whether the indicated network supports LAN services; AMF network The element determines whether the network indicated by the requested network information supports LAN services according to the first indication information.
  • the AMF network element directly determines whether the network indicated by the requested network information supports LAN services according to the requested network information.
  • the AMF network element determines whether the network indicated by the requested network information supports LAN services, which can also be implemented in the following manner: The AMF network element determines whether the network indicated by the requested network information supports LAN services according to local configuration information; Alternatively, the AMF network element determines whether the network indicated by the requested network information supports the LAN service according to the subscription data of the terminal; or, the PDU session establishment request also includes the second indication that the network indicated by the requested network information supports the LAN service According to the second indication information, the AMF network element determines that the network indicated by the requested network information supports the LAN service.
  • the AMF network element determines whether the network indicated by the requested network information supports LAN services based on other information other than the requested network information.
  • an embodiment of the present application provides a local area network communication method.
  • the method includes the following steps: an NRF network element receives an SMF query request message sent by an AMF network element, and the SMF query request message is used to request to obtain a PDU session requested to establish a terminal
  • the SMF identifier for management, the SMF query request message carries the requested network information and LAN indication information.
  • the LAN indication information is used to indicate that the requested network information indicates that the network supports LAN services; the NRF network element determines according to the LAN indication information Obtain the SMF identifier corresponding to the requested network information from the association relationship between the SMF identifier and the information of the network; the NRF network element sends an SMF query response message to the AMF network element, and the SMF query response message carries the acquired SMF identifier.
  • the NRF network element determines whether the network indicated by the requested network information supports LAN services, and then can obtain the SMF identifier according to the association relationship, and the SMF network element identified by the SMF identifier is available It manages the PDU session initiated by the terminal in the LAN group and used to establish LAN communication. Since the association relationship is the association relationship between the SMF identifier and the information of the network, for all terminals in the LAN group, after the NRF network element receives the SMF query request message, the NRF network element determines the SMF identifier according to the above association relationship. Each terminal in the LAN group selects the same SMF ID. In other words, with the above solution, when the terminal initiates a PDU session, the same SMF network element can be selected for session management for all terminals in the same LAN group.
  • the method before the NRF network element receives the SMF query request message sent by the AMF network element, the method further includes: the NRF network element receives the LAN configuration parameters sent by the NEF network element or the OAM entity, and the LAN configuration parameters include LAN Corresponding network information; select the SMF for session management for the LAN; associate the SMF selected by the NRF and the information of the network corresponding to the LAN to obtain the association relationship.
  • association relationship in the NRF network element may also be provided by the AF network element through the NEF network element, or provided by the OAM entity, which will not be repeated here.
  • the embodiments of the present application also provide a local area network communication device, which is applied to an AMF network element, and the beneficial effects can be referred to the description of the first aspect and will not be repeated here.
  • the device has the function of realizing the behavior in the method example of the first aspect described above.
  • the functions can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the structure of the device includes a receiving unit, a processing unit, and a sending unit. These units can perform the corresponding functions in the method example of the first aspect. For details, please refer to the detailed description in the method example. Do repeat.
  • an embodiment of the present application also provides a local area network communication device, which is applied to a UDM network element, and the beneficial effects can be referred to the description of the second aspect and will not be repeated here.
  • the device has the function of realizing the behavior in the method example of the second aspect described above.
  • the functions can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the structure of the device includes a receiving unit and a sending unit, and may also include a processing unit. These units can perform the corresponding functions in the method example of the second aspect. For details, refer to the detailed description in the method example. Do not repeat them here.
  • an embodiment of the present application also provides a local area network communication device, which is applied to an NRF network element, and the beneficial effects can be referred to the description of the third aspect, which will not be repeated here.
  • the device has the function of realizing the behavior in the method example of the third aspect.
  • the functions can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the structure of the device includes a receiving unit, a processing unit, and a sending unit. These units can perform the corresponding functions in the method example of the third aspect. For details, please refer to the detailed description in the method example. Do repeat.
  • an embodiment of the present application also provides a local area network communication device.
  • the local area network communication device is applied to an AMF network element.
  • the device has the function of realizing the behavior in the method example of the fourth aspect.
  • the functions can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the structure of the device includes a receiving unit, a processing unit, and a sending unit. These units can perform the corresponding functions in the method example of the fourth aspect. For details, please refer to the detailed description in the method example. Do repeat.
  • an embodiment of the present application also provides a local area network communication device.
  • the local area network communication device is applied to an NRF network element.
  • the device has the function of realizing the behavior in the method example of the fifth aspect.
  • the functions can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the structure of the device includes a receiving unit, a processing unit, and a sending unit. These units can perform the corresponding functions in the method example of the fifth aspect. For details, please refer to the detailed description in the method example. Do repeat.
  • an embodiment of the present application also provides a local area network communication device, which is applied to an AMF network element, and the beneficial effects can be referred to the description of the first aspect and will not be repeated here.
  • the structure of the local area network communication device includes a processor and a memory, and the processor is configured to support the terminal to perform the corresponding function in the above-mentioned method of the first aspect.
  • the memory is coupled with the processor, and stores the program instructions and data necessary for the local area network communication device.
  • the structure of the local area network communication device also includes a communication interface for communicating with other devices.
  • an embodiment of the present application also provides a local area network communication device, which is applied to a UDM network element, and the beneficial effects can be referred to the description of the second aspect and will not be repeated here.
  • the structure of the local area network communication device includes a processor and a memory, and the processor is configured to support the terminal to perform the corresponding function in the above-mentioned second aspect method.
  • the memory is coupled with the processor, and stores the program instructions and data necessary for the local area network communication device.
  • the structure of the local area network communication device also includes a communication interface for communicating with other devices.
  • the embodiments of the present application also provide a local area network communication device, which is applied to an NRF network element, and the beneficial effects can be referred to the description of the third aspect and will not be repeated here.
  • the structure of the local area network communication device includes a processor and a memory, and the processor is configured to support the terminal to perform the corresponding function in the method of the third aspect.
  • the memory is coupled with the processor, and stores the program instructions and data necessary for the local area network communication device.
  • the structure of the local area network communication device also includes a communication interface for communicating with other devices.
  • an embodiment of the present application also provides a local area network communication device, which is applied to an AMF network element, and the beneficial effects can be referred to the description of the fourth aspect, which will not be repeated here.
  • the structure of the local area network communication device includes a processor and a memory, and the processor is configured to support the terminal to execute the corresponding function in the above-mentioned fourth aspect method.
  • the memory is coupled with the processor, and stores the program instructions and data necessary for the local area network communication device.
  • the structure of the local area network communication device also includes a communication interface for communicating with other devices.
  • the embodiments of the present application also provide a local area network communication device.
  • the local area network communication device is applied to an NRF network element.
  • the structure of the local area network communication device includes a processor and a memory, and the processor is configured to support the terminal to perform the corresponding function in the above-mentioned fifth aspect method.
  • the memory is coupled with the processor, and stores the program instructions and data necessary for the local area network communication device.
  • the structure of the local area network communication device also includes a communication interface for communicating with other devices.
  • an embodiment of the present application provides a local area network communication system, including an AMF network element and a UDM network element.
  • the UDM network element is used to receive the data update request sent by the OAM entity or NEF network element.
  • the data update request includes LAN configuration parameters.
  • the LAN configuration parameters include the identification of the LAN, the information of the network corresponding to the LAN, and the member list corresponding to the LAN;
  • the association relationship between the SMF identifier and the information of the network corresponding to the LAN is stored in the subscription data of the terminal indicated by the member list corresponding to the LAN; wherein the SMF network element corresponding to the SMF identifier is used to indicate the terminal to the member list corresponding to the LAN
  • the SMF network element that manages the PDU session sends the association relationship to the AMF network element.
  • the AMF network element is used to receive the association relationship from the UDM network element; to receive the PDU session establishment request sent by the first terminal, the PDU session establishment request carries the requested network information, and the first terminal is indicated by the member list corresponding to the LAN Any one of the terminals; determine whether the network indicated by the requested network information supports LAN services; in the case that the network indicated by the requested network information supports LAN services, obtain according to the association relationship and the requested network information The SMF identifier for managing the PDU session requested by the first terminal to be established.
  • the LAN communication system also includes AF network elements and NEF network elements: AF network elements are used to send LAN management requests to NEF network elements, and the LAN management requests carry LAN configuration parameters; NEF network elements, Used to receive LAN management requests; send data update requests to UDM network elements.
  • the data update request also includes an SMF identifier for managing the PDU session of the terminal indicated by the member list corresponding to the LAN.
  • the NEF network element is also used to obtain the SMF identifier for managing the PDU session of the terminal indicated by the member list corresponding to the LAN through the NRF network element.
  • the information of the requested network includes the first indication information of whether the indicated network supports the LAN service; when the AMF network element determines whether the network indicated by the requested network information supports the LAN service, the specific It is used to determine whether the network indicated by the requested network information supports local area network services according to the first indication information.
  • the AMF network element determines whether the network indicated by the requested network information supports LAN services, it is specifically used to determine whether the network indicated by the requested network information supports the LAN service according to the local configuration information Service; or, according to the subscription data of the terminal, determine whether the network indicated by the requested network information supports LAN services; or, the PDU session establishment request also includes the second indication information that the network indicated by the requested network information supports LAN services ; According to the second indication information, it is determined that the network indicated by the requested network information supports LAN services.
  • the information of the network corresponding to the LAN or the information of the requested network includes DNN; or, DNN and S-NSSAI.
  • an embodiment of the present application provides a communication system including an NRF network element and an AMF network element.
  • the AMF network element is used to receive the PDU session establishment request sent by the terminal.
  • the PDU session establishment request carries the requested network information; and sends the SMF query request message to the NRF network element.
  • the SMF query request message is used to request the establishment of the terminal request.
  • the SMF query request message carries the information of the requested network.
  • the NRF network element is used to receive the SMF query request message sent by the AMF network element; determine whether the network indicated by the requested network information supports LAN services; in the case that the network indicated by the requested network information supports LAN services, according to The association relationship between the SMF identifier and the information of the network and the information of the requested network is obtained, and the SMF identifier for managing the PDU session requested to be established by the terminal is obtained.
  • the NRF network element is also used to: receive the LAN configuration parameters sent by the NEF network element or OAM entity, the LAN configuration parameters include the information of the network corresponding to the LAN; select the managed SMF for the LAN; and store the NRF in association The selected SMF and the information of the network corresponding to the LAN obtain the association relationship.
  • the local area network communication system further includes: AF network element, used to send LAN configuration parameters to NRF network element through NEF network element; NEF network element, used to receive LAN configuration parameters from AF network element ; Send LAN configuration parameters to NRF network element.
  • the information of the requested network includes the first indication information of whether the indicated network supports the LAN service; when the NRF network element determines whether the network indicated by the requested network information supports the LAN service, the specific It is used to determine whether the network indicated by the requested network information supports local area network services according to the first indication information.
  • the NRF network element determines whether the network indicated by the requested network information supports LAN services, it is specifically used to determine whether the network indicated by the requested network information supports the LAN service according to the local configuration information business.
  • the information of the network corresponding to the LAN or the information of the requested network includes DNN; or, DNN and S-NSSAI.
  • an embodiment of the present application provides a communication system, including an AMF network element and an NRF network element.
  • the AMF network element is used to receive the PDU session establishment request sent by the terminal.
  • the PDU session establishment request carries the information of the requested network; determines whether the network indicated by the requested network information supports LAN services; and is indicated by the requested network information If the network supports LAN services, an SMF query request message is sent to the NRF network element.
  • the SMF query request message is used to carry the requested network information and LAN indication information in the request, and the LAN indication information is used to indicate the information of the requested network.
  • the indicated network supports LAN services.
  • the NRF network element is used to receive the SMF query request message sent by the AMF network element; according to the LAN indication information, determine to obtain the SMF identifier corresponding to the requested network information from the association relationship between the SMF identifier and the information of the network; to the AMF network element Send an SMF query response message, and the SMF query response message carries the acquired SMF identifier.
  • the NRF network element is also used to: receive the LAN configuration parameters sent by the NEF network element or the OAM entity, the LAN configuration parameters include the information of the network corresponding to the LAN; select the SMF for session management for the LAN; associate storage The SMF selected by the NRF and the information of the network corresponding to the LAN obtain the association relationship.
  • the information of the requested network includes the first indication information of whether the indicated network supports the LAN service; when the AMF network element determines whether the network indicated by the requested network information supports the LAN service, the specific It is used to determine whether the network indicated by the requested network information supports local area network services according to the first indication information.
  • the AMF network element determines whether the network indicated by the requested network information supports LAN services, it is specifically used to determine whether the network indicated by the requested network information supports the LAN service according to the local configuration information Service; or, according to the subscription data of the terminal, determine whether the network indicated by the requested network information supports LAN services; or, the PDU session establishment request also includes the second indication information that the network indicated by the requested network information supports LAN services ; According to the second indication information, it is determined that the network indicated by the requested network information supports LAN services.
  • the information of the network corresponding to the LAN or the information of the requested network includes DNN; or, DNN and S-NSSAI.
  • this application also provides a computer-readable storage medium that stores instructions in the computer-readable storage medium, which when run on a computer, causes the computer to execute the methods described in the above aspects.
  • the present application also provides a computer program product containing instructions, which when run on a computer, causes the computer to execute the methods described in the above aspects.
  • the present application also provides a computer chip connected to a memory, and the chip is configured to read and execute a software program stored in the memory, and execute the methods described in the foregoing aspects.
  • FIG. 1 is a schematic structural diagram of the first network architecture provided by an embodiment of this application.
  • Figure 2 is a schematic structural diagram of a second network architecture provided by an embodiment of the application.
  • FIG. 3 is a schematic structural diagram of a third network architecture provided by an embodiment of this application.
  • FIG. 4 is a schematic flowchart of a first local area network communication method provided by an embodiment of this application.
  • FIG. 5 is a schematic flowchart of a second local area network communication method provided by an embodiment of this application.
  • Fig. 6 is a schematic structural diagram of a first LAN communication system provided by an embodiment of the application.
  • FIG. 7 is a schematic flowchart of a third local area network communication method provided by an embodiment of the application.
  • FIG. 8 is a schematic flowchart of a fourth local area network communication method provided by an embodiment of this application.
  • FIG. 9 is a schematic flowchart of a fifth local area network communication method provided by an embodiment of this application.
  • FIG. 10 is a schematic structural diagram of a second local area network communication system provided by an embodiment of the application.
  • FIG. 11 is a schematic flowchart of a sixth local area network communication method provided by an embodiment of this application.
  • FIG. 12 is a schematic flowchart of a seventh local area network communication method provided by an embodiment of this application.
  • FIG. 13 is a schematic structural diagram of a third local area network communication system provided by an embodiment of this application.
  • FIG. 14 is a schematic flowchart of an eighth local area network communication method provided by an embodiment of this application.
  • the network architecture is a 5G network architecture.
  • the network elements in the network architecture include a terminal, an access network (AN), a core network (Core), and a data network (DN).
  • the access network may be a radio access network (radio access network, RAN).
  • radio access network radio access network
  • terminal, AN and Core are the main parts of this network architecture.
  • the control plane is responsible for the management of the mobile network
  • the user plane is responsible for the transmission of business data.
  • the NG2 reference point is between the RAN control plane and the Core control plane
  • the NG3 reference point is between the RAN user plane and the Core user plane
  • the NG6 reference point is between the Core user plane and the DN. between.
  • the terminal is a device with wireless transceiver function, which is the entry point for mobile users to interact with the network. It can provide basic computing and storage capabilities, and display business windows to users and accept users. Operation input.
  • the terminal will use the new air interface technology to establish a signal connection and data connection with the AN to transmit control signals and service data to the network.
  • the terminal can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; it can also be deployed on the water (such as a ship, etc.); it can also be deployed in the air (such as aeroplane, balloon, satellite, etc.).
  • the terminal may be a mobile phone (mobile phone), a tablet computer (pad), a computer with wireless transceiver function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, and an industrial control (industrial control) Wireless terminals in, self-driving (self-driving), wireless terminals in remote medical, wireless terminals in smart grid, wireless terminals in transportation safety, Wireless terminals in a smart city, wireless terminals in a smart home, etc.
  • the AN is similar to the base station in the traditional communication network. It is deployed close to the terminal to provide network access functions for authorized users in a specific area. It can be determined according to the user's level and service requirements. Quality transmission tunnel to transmit user data. AN can manage and reasonably use its own resources, provide access services for terminals on demand, and be responsible for forwarding control signals and service data between the terminal and the Core.
  • the Core is responsible for maintaining mobile network subscription data, managing the network elements of the mobile network, and providing the terminal with functions such as session management, mobility management, policy management, and security authentication.
  • the terminal when the terminal is attached, the terminal is provided with network access authentication; when the terminal has a service request, the terminal is allocated network resources; when the terminal is moving, the terminal is updated with network resources; when the terminal is idle, the terminal is provided with fast recovery Mechanism: When the terminal is detached, it releases network resources for the terminal; when the terminal has service data, it provides the terminal with data routing functions, such as forwarding uplink data to DN, or receiving downlink data from DN and forwarding to AN.
  • data routing functions such as forwarding uplink data to DN, or receiving downlink data from DN and forwarding to AN.
  • DN is a data network that provides business services to users.
  • the client is usually located at the terminal, and the server is usually located at the DN.
  • the DN can be a private network, such as a local area network, or an external network that is not under the control of operators, such as the Internet, or a private network jointly deployed by operators, such as providing IP multimedia core network subsystem, IMS) service network.
  • IMS IP multimedia core network subsystem
  • the network architecture is a 5G network architecture.
  • the network elements in the 5G architecture include a terminal, a radio access network (RAN), and a data network (DN).
  • the terminal is a user equipment (UE) as an example.
  • the network architecture also includes core network elements, which include user plane function (UPF) network elements and control plane function network elements.
  • the control plane function network elements include but are not limited to access and mobility management function (AMF) network elements, session management function (session management function, SMF) network elements, and authentication server function (authentication server).
  • AMF access and mobility management function
  • SMF session management function
  • authentication server function authentication server
  • AUSF application function
  • AF application function
  • UDM unified data management
  • PCF policy control function
  • NEF network exposure function
  • NF repository function NF repository function, NRF
  • network slice selection function network slice selection function
  • control plane function network element may also include a local area network service management function network element (LAN service management function, LSMF).
  • LAN service management function LSMF
  • the LSMF network element can be used as an independent physical function entity, or as a logical function entity deployed in other network elements (such as NEF network elements, PCF network elements, UDM network elements, and SMF network elements).
  • control plane functional network elements adopt point-to-point communication, that is, the interface communication between the control plane functional network elements adopts a set of specific messages, and the control plane functional network at both ends of the interface Yuan can only communicate using this specific set of messages.
  • control plane adopts a service-oriented architecture, that is, the interaction between the control plane functional network elements adopts the method of service invocation, and the control plane functional network element will open services to other control plane functional network elements for other control Face function network element call.
  • each network element in the network architecture shown in FIG. 2 is described in detail below. Since the functions of UE, RAN, and DN have been introduced in the related description of the network architecture shown in FIG. 1, the following focuses on the functions of each core network element.
  • UPF network element is a functional network element of the user plane, which is mainly responsible for connecting to external networks. It includes long term evolution (LTE) serving gateway (SGW) and packet data network gateway (PDN) -GW) related functions. Specifically, the UDF can perform user data packet forwarding according to the routing rules of the SMF, for example, uplink data is sent to a DN or other UPF; downlink data is forwarded to another UPF or RAN.
  • LTE long term evolution
  • SGW serving gateway
  • PDN packet data network gateway
  • the AMF network element is responsible for the access management and mobility management of the UE, such as the state maintenance of the UE, the reachability management of the UE, and the forwarding of the mobility management non-access-stratum (MM NAS) message , Session management (session management, SM) N2 message forwarding.
  • the AMF network element can implement the mobility management function in the MME in the LTE network framework, and can also implement the access management function.
  • the SMF network element is responsible for session management, allocating and releasing resources for the UE's session; the resources include session quality of service (QoS), session path, forwarding rules, etc.
  • QoS session quality of service
  • the AUSF network element is used to perform security authentication of the UE.
  • the AF network element can be a third-party application control platform or the operator’s own equipment.
  • the AF network element can provide services for multiple application servers.
  • the UDM network element can store the subscription information of the UE.
  • the PCF network element is used for user policy management, similar to the policy and charging rules function (PCRF) network element in LTE. It is mainly responsible for the generation of policy authorization, service quality and charging rules, and will respond accordingly.
  • the rules are issued to the UPF network elements through the SMF network element to complete the installation of corresponding policies and rules.
  • NEF network elements are used to open network functions to third parties in the form of northbound application programming interface (API).
  • API application programming interface
  • NRF network elements are used to provide storage and selection functions of network function entity information for other network elements.
  • the NSSF network element is used to select network slices for the UE.
  • the network architecture shown in Figure 2 may also include LSMF network elements.
  • the LSMF network element is used for LAN type service area management.
  • the network elements related to this application mainly include: UE, AMF, SMF, UDM, NRF and NEF.
  • AMF, SMF, UDM, NRF, NEF, etc. are referred to as network elements, which are merely illustrative.
  • a network element may also be called an instance or a network functional entity.
  • UDM network elements may also be called UDM instances or UDM network function entities;
  • AMF network elements may also be called AMF instances or AMF network function entities.
  • the UDM network elements described in the embodiments of this application can realize their functions by interacting with the same data repository (UDR) network element, and the UDR network element is used to store UDM network elements for execution UDM network element is used to interact with other network elements for the data required for its operation.
  • data such as the association relationship between the SMF identifier and the information of the requested network, the SMF selection subscription data of the terminal, and the like may be stored as subscription data or application data in the UDR network element.
  • the UDR network element and the UDM network element may be two independent physical entities, and the UDR network element may also be integrated in the UDM network element, which is not specifically limited in comparison with the embodiments of this application.
  • the network architecture supporting 5GLAN type services may be as shown in FIG. 3.
  • the UE establishes a session to the UPF node to access the user plane of the 5GLAN; UDM network elements/UDR network elements mainly provide management functions of 5GLAN type services; after the UE initiates the session, the embodiments of this application are used to provide The solution selects the SMF network element, and the selected SMF network element is responsible for managing the session initiated by the UE.
  • the SMF network element identified by the SMF identifier (also referred to as SMF ID) is used to manage the PDU session initiated by the terminal.
  • SMF ID can be a character string, an address (for example, an IP address), or a fully qualified domain name (FQDN).
  • the sessions in which all terminals in the same LAN group connect to the 5GLAN are under the management and control of the same SMF network element.
  • a terminal initiates a 5GLAN session it needs to select the same SMF network element for all terminals in the LAN group, so that data exchange between terminals in the LAN group can be realized under the management of the SMF network element.
  • the SMF identifier described in the embodiment of the present application can also be replaced with an SMF set (SMF Set) identifier.
  • the SMF Set can contain multiple SMF network elements, and each SMF network element shares context. Multiple SMF network elements in an SMF Set are mutually backup, that is, multiple SMF network elements in an SMF Set can cooperate with each other. When one SMF network element crashes, other SMF network elements in the SMF Set can replace the SMF network element. Then, it is not difficult to understand that for a terminal in the same LAN group, any SMF network element in the SMF Set can be used to manage the PDU session initiated by the terminal and used to establish LAN communication.
  • the SMF Set contains four SMF network elements, namely SMF1, SMF2, SMF3, and SMF4; when the terminal A in the LAN group initiates a PDU session, any SMF network element of SMF1, SMF2, SMF3, and SMF4 can be used.
  • the element manages the PDU session, for example, SMF1; when terminal A initiates a new PDU session again, any SMF network element among SMF1, SMF2, SMF3, and SMF4 may manage the PDU session, for example, SMF2.
  • the SMF network element identified by the SMF ID can be used to manage the PDU session initiated by the terminal and used to establish LAN communication; if adopted
  • the solution provided in the embodiments of the present application obtains the SMF Set ID, and then any SMF network element in the SMF Set identified by the SMF Set ID can manage the PDU session initiated by the terminal and used to establish LAN communication.
  • obtaining the SMF ID is taken as an example for introduction, and the implementation of obtaining the SMF Set ID will not be repeated.
  • the network information carried in the PDU session establishment request may be used to indicate the network that the terminal requests to access when initiating the PDU session.
  • the data network name such as DNN
  • the network slice information such as S-NSSAI
  • the data network name corresponding to the PDU session of the terminal may also be indicated.
  • the network information can be fully qualified domain name (FQDN), single network slice selection assistance information (S-NSSAI), virtual local area network (VLAN) identification (VLAN identity, VID), character string, character string, internal group identifier (internal group identifier), external group identifier (external group identifier), serial number, or a special domain name, such as data network name (data network name, DNN).
  • FQDN fully qualified domain name
  • S-NSSAI single network slice selection assistance information
  • VLAN virtual local area network identification
  • VLAN identity, VID virtual local area network
  • character string character string
  • character string character string
  • internal group identifier internal group identifier
  • external group identifier external group identifier
  • serial number or a special domain name, such as data network name (data network name, DNN).
  • the network information can also adopt some special formats.
  • the network information can also include provider information, operator information, network information, domain information, and so on.
  • the network information can also be a combination of the above
  • the implementation purpose of the embodiments of this application is to select SMF network elements for PDU session management for the terminals in the LAN group. Therefore, after the network side (for example, the AMF network element) receives the PDU session establishment request of the terminal, it is determined When the PDU session initiated by the terminal this time is to request a LAN type service (that is, it is determined that the network indicated by the information of the network requested by the terminal supports LAN services), the SMF will be selected for the PDU session according to the solution provided in the embodiment of this application. Network element. Specifically, there can be two determination methods as follows.
  • the first way directly determine according to the first indication information in the network information.
  • the first indication information in the DNN may be used to indicate that the DNN is reserved for LAN type services.
  • some domains in the DNN can be used to identify the LAN category, and some domains can be used to identify the group information of the LAN.
  • the LAN category information and the LAN group information can be regarded as the first indication information.
  • the network side (such as the AMF network element or the NRF network element) can directly determine the terminal according to the first indication information in the DNN
  • the network indicated by the requested network information supports LAN services.
  • DNN+S-NSSAI the information of the network as DNN+S-NSSAI as an example
  • some domains in DNN can be used to identify the LAN category
  • some domains in S-NSSAI can be used to identify the group information of LAN
  • some of DNN Domains can be used to identify, and certain domains in the group information S-NSSAI of the LAN can be used to identify the LAN category.
  • the LAN category information and the LAN group information can be regarded as the first indication information
  • the network side such as the AMF network element or the NRF network element
  • the second way Determine based on information other than the information on the network.
  • the AMF network element or the NRF network element can determine whether the network indicated by the network information supports LAN services according to the local configuration information;
  • the local configuration information can be, for example, a list that records all the supported LAN services Collection of information about the network.
  • the information of the network requested by the terminal is included in the list, it indicates that the network indicated by the information of the network requested by the terminal supports LAN services.
  • the above-mentioned local configuration information is pre-configured on the AMF network element or the NRF network element.
  • the AMF network element or the NRF network element When the AMF network element or the NRF network element receives the network information carried in the PDU session establishment request sent by the terminal, it is based on the pre-configured local configuration Information, which determines that the network indicated by the information of the network requested by the terminal supports LAN services. In this way, the network supporting LAN services is specially reserved by the operator for the LAN.
  • the AMF network element can also determine whether the network indicated by the network information supports LAN services according to the subscription data of the terminal.
  • the subscription data of the terminal may also include corresponding indication information to indicate whether the network indicated by the network information supports local area network services.
  • the AMF network element when the AMF network element receives the PDU session establishment request of the terminal, it queries whether there is an association relationship between the SMF identifier and the information of the requested network according to the information of the network requested in the PDU session establishment request. If so, the terminal is determined The network indicated by the requested network information supports LAN services.
  • the AMF network element may also determine that the network indicated by the information of the network requested by the terminal supports the LAN service according to the second indication information carried in the PDU session establishment request sent by the terminal.
  • the second indication information may be one or more of request type information (request type), session type information (session type), or new information element (information element, IE) (such as a LAN identifier).
  • request type request type
  • session type session type
  • new information element information element, IE
  • a new information element such as 5GLAN ID or 5GLAN indication
  • a new information element can be added to the PDU session establishment request based on the existing technology to indicate that the network indicated by the network information requested in the PDU session establishment request supports LAN services .
  • the LAN identification can be understood as an identification of a LAN group, and can also be referred to as a LAN identification.
  • the LAN identification can be used to identify a LAN group or a specific LAN type service.
  • the terminals identified by the same LAN identifier belong to the same LAN group, and the LAN type service corresponding to the LAN identifier can be used, that is, the terminals identified by the same LAN identifier can perform LAN communication.
  • the LAN identification Under the 5G network architecture, the LAN identification can also be referred to as the 5GLAN identification.
  • a terminal when a terminal initiates a session, it may carry a LAN identifier in the non-access-stratum (NAS) message of the PDU session establishment request to indicate that the terminal belongs to the LAN group corresponding to the LAN identifier .
  • the LAN configuration parameters sent by the operation administration and maintenance (OAM) entity or AF network element to the UDM network element or NRF network element through the NEF network element may also carry the LAN identifier to indicate that the LAN configuration parameter is used for the
  • the LAN group corresponding to the LAN ID is configured.
  • the OAM entity is a configuration interface in the operator's network management system and is oriented to the operator; the operator can directly configure the parameters on the network element in the mobile network through the OAM entity.
  • LAN configuration parameters also can be called 5GLAN configuration parameters
  • the LAN configuration parameters can be provided by the AF network element through the NEF network element, or can be provided by the OAM entity.
  • the LAN configuration parameters can include one or more of the following parameters:
  • LAN identifier also called group identifier
  • group identifier used to define 5GLAN groups in 5G networks
  • the information of the network corresponding to the LAN is used to identify the network corresponding to the LAN group, for example, it may include DNN or DNN+S-NSSAI;
  • the member list corresponding to the LAN is used to indicate the member terminals in the LAN group
  • the LAN configuration parameters may also include PDU session type information.
  • the UDM network element After the UDM network element (or NRF network element) receives the 5GLAN configuration parameters, it can write the relevant data in the 5GLAN configuration parameters into the subscription data of each member terminal in the LAN group.
  • the association relationship between the SMF identifier and the information of the network corresponding to the LAN can be written into the LAN.
  • the network indicated by the information indicating the network corresponding to the LAN in the subscription data of the terminal supports the LAN service.
  • the SMF identifier may be provided by the NEF network element or the OAM entity, or may be obtained by the NEF network element or UDM network element querying the NRF network element, which is not limited in the embodiment of this application.
  • the association relationship is the association relationship between the SMF identifier and the information of the network.
  • the SMF network element identified by the SMF identifier is used to manage the PDU session initiated by the terminal and used to establish LAN communication.
  • the PDU sessions initiated by all terminals in the same LAN group for establishing LAN communication need to be under the management and control of the same SMF network element (or the same SMF set).
  • the same SMF network element can also be selected for the terminal according to the association relationship, so that all terminals in the LAN group request LAN type services. , PDU sessions are all managed by the same SMF network element.
  • the implementation of this application provides a local area network communication method, device, and system for selecting SMF network elements for the terminal when the terminal initiates a PDU session.
  • FIG. 4 is a schematic flowchart of a local area network communication method provided by an embodiment of this application.
  • the AMF network element receives a PDU session establishment request sent by the terminal.
  • the PDU session establishment request carries information of the requested network.
  • the requested network information may be DNN, S-NSSAI, or DNN+S-NSSAI.
  • the AMF network element determines whether the network indicated by the requested network information supports LAN services.
  • the AMF network element determines that the network indicated by the requested network information supports LAN services, which means that the PDU session initiated by the terminal this time requests a LAN type service.
  • the PDU session can be considered a LAN session, and the AMF network element can Perform subsequent steps to select an SMF network element for the PDU session establishment request initiated by the terminal according to the method of the embodiment of the present application.
  • the terminal cannot simultaneously subscribe to the LAN service and other non-LAN services for the information of the requested network.
  • the AMF network element may determine whether the network indicated by the requested network information supports LAN services in multiple ways. For details, please refer to the above description, which will not be repeated here.
  • the AMF network element obtains the SMF identifier according to the association relationship between the SMF identifier and the information of the network and the information of the requested network.
  • the SMF network element identified by the SMF identifier is used to manage the PDU session initiated by the terminal and used to establish LAN communication.
  • the AMF network element can obtain the terminal's contract data from the UDM network element, and the terminal's contract data carries the above-mentioned association relationship.
  • the AMF network element may obtain the aforementioned subscription data in the registration process of the terminal.
  • the above-mentioned association relationship may be carried in the SMF selected subscription data, and the SMF selected subscription data is a part of the terminal's subscription data.
  • the AMF network element sends a Nudm_SDM_Get Request message to the UDM network element to request the subscription data of the terminal, which carries the information of the requested network, the identification of the terminal, and can also carry the subscription data type information (subscription data type).
  • the UDM network element can send a Nudm_SDM_Get Response message to the AMF network element, which carries the subscription data of the terminal.
  • the AMF network element may obtain the above-mentioned association relationship from the UDM network element in the subscription document update notification procedure of the terminal (Subscription Profile Update Notification procedure).
  • the AMF network element obtains updated subscription data from the UDM network element through subscription. That is, when the subscription data of a certain terminal in the UDM network element changes, the UDM network element will notify the AMF network element of the updated subscription data through a notification message (for example, Nudm_SDM_Notification Notify message).
  • the UDM network element before the UDM network element sends the above-mentioned association relationship to the AMF network element, the above-mentioned association relationship must be acquired first; then, the UDM network element stores the association relationship in the subscription data of each member terminal in the LAN group.
  • the association relationship may be stored in the SMF selection subscription data (SMF selection subscription data) of each member terminal in the LAN group.
  • the association relationship is stored in the terminal's subscription data, then the AMF network element receives the information sent by any terminal in the LAN group for establishing LAN communication After the PDU session establishment request, the AMF network element can obtain the association relationship from the subscription data of the terminal, and then select the same SMF network element for management of the PDU session initiated by all terminals in the LAN group for establishing LAN communication.
  • the AMF network element does not need to go to the NRF network element to query the SMF ID list for managing the PDU session as in the prior art, but directly obtain the association relationship from the contract data, and then according to the association relationship and the network information requested by the terminal The information determines the SMF identifier of the SMF network element used to manage the PDU session initiated by the terminal this time and used to establish LAN communication.
  • the UDM network element can obtain the above-mentioned association relationship in a variety of ways.
  • the UDM receives the data update request sent by the AF network element through the NEF network element; or the UDM network element receives the data update request sent by the OAM entity.
  • the data update request carries the LAN configuration parameters, where the definition of the LAN configuration parameters is as described above, and will not be repeated here.
  • the data update request also includes an SMF identifier.
  • the UDM network element After receiving the data update request, the UDM network element saves the association relationship between the SMF identifier and the information of the network corresponding to the LAN (that is, the information of the network carried in the LAN configuration parameters) in the subscription data of each terminal indicated by the member list corresponding to the LAN .
  • the data update request does not include the SMF identifier; in this case, there are two possible ways to obtain the association relationship: (1) NEF network element queries NRF according to the data update request The network element obtains the candidate SMF identifier for managing the session initiated by the terminal; the NEF network element selects one of the candidate SMF identifiers as the SMF identifier (the NRF network element can also directly return only one SMF identifier); then, the NEF network element sends the UDM The network element sends the SMF identifier and the LAN configuration parameters; the UDM network element saves the association relationship between the SMF identifier and the information of the network corresponding to the LAN in the subscription data of each terminal indicated by the member list corresponding to the LAN.
  • UDM After UDM receives the data update request, it queries the NRF network element according to the data update request, and obtains the candidate SMF identifier for managing the session initiated by the terminal; the UDM network element selects one of the candidate SMF identifiers as the SMF identifier (NRF network element It is also possible to directly return only one SMF identifier); the UDM network element saves the association relationship between the SMF identifier and the information of the network corresponding to the LAN in the subscription data of each terminal indicated by the member list corresponding to the LAN.
  • the UDM network element may send a subscription data update notification to the AMF network element, and the subscription data update notification includes the association relationship. Then, after the terminal sends the PDU session establishment request, the SMF identifier can be determined according to the updated association relationship.
  • the local area network communication method provided in the first embodiment may be as shown in FIG. 5.
  • the UDM network element receives the data update request sent by the NEF network element, and the data update request carries the LAN configuration parameters and the SMF identifier.
  • the LAN configuration parameters include information about the network corresponding to the LAN.
  • the UDM network element After receiving the data update request, the UDM network element saves the association relationship between the SMF identifier and the information of the network corresponding to the LAN in the subscription data of the LAN member terminal, and notifies the AMF network element of the updated subscription data through the subscription data update notification .
  • the AMF network element receives the PDU session establishment request of the terminal, it can determine the SMF identifier according to the association relationship in the updated subscription data.
  • the communication system includes an AMF network element and a UDM network element.
  • the UDM network element is used to perform related operations of the UDM network element in the first embodiment
  • the AMF network element is used to perform related operations of the AMF network element in the first embodiment.
  • the communication system shown in FIG. 6 further includes AF network elements and NEF network elements.
  • the AF network element is used to send a LAN management request to the NEF network element, and the LAN management request carries LAN configuration parameters.
  • NEF network element is used to receive LAN management request; send data update request to UDM network element.
  • the data update request also includes an SMF identifier for managing the PDU session of the terminal indicated by the member list corresponding to the LAN.
  • FIG. 7 another local area network communication method provided by this embodiment of the application can be regarded as a specific implementation manner of Embodiment 1.
  • the network information is DNN as an example.
  • the method includes the following steps:
  • NEF obtains the 5GLAN management request of AF.
  • the 5G LAN management request may include LAN configuration information and SMF ID, or may only include LAN configuration information, for example, the LAN configuration information includes DNN.
  • the SMF ID in the 5GLAN management request is used to indicate the SMF network element that manages the PDU session for LAN communication established by the member terminal corresponding to the LAN. If the 5GLAN management request does not contain the SMF ID, NEF can query the NRF and select an SMF ID from the SMF list returned by the NRF network element as a PDU session for LAN communication established to the member terminal corresponding to the LAN. Managed SMF network element.
  • OAM or NEF configures DNN, SMF ID, and UE ID to UDM.
  • the OAM or NEF can also configure the UDM with other 5GLAN configuration parameters as described above. Since other 5GLAN configuration parameters are less relevant to the solution of the embodiment of the present application, they will not be repeated here.
  • UDM After UDM receives the configuration, it can save the association relationship between DNN and SMF ID in the UE subscription data indicated by the UE ID.
  • the UE sends a NAS message to the AMF network element.
  • the NAS message can carry the PDU session ID and DNN.
  • the NAS message can be regarded as a PDU session establishment request.
  • DNN can be regarded as the information of the network requested by the terminal.
  • the DNN may include the first indication information.
  • the AMF can determine, based on the first indication information, that the network indicated by the information of the network requested by the terminal supports LAN services, and then determine to perform the subsequent steps, which are initiated by the terminal,
  • the SMF network element is selected for establishing the PDU session for LAN communication.
  • the AMF may also determine that the NAS message carries the DNN reserved for 5GLAN type services through other implementations described in the first embodiment, which will not be repeated here.
  • the AMF sends a Nudm_SDM_Get request message to the UDM to request to obtain the subscription data.
  • UDM sends Nudm_SDM_Get response message to AMF.
  • the Nudm_SDM_Get response message carries UE subscription data
  • the UE subscription data includes the association relationship between DNN and SMF ID.
  • the AMF authenticates the UE request according to the contract; and selects the SMF according to the above-mentioned association relationship and the DNN obtained from the NAS message.
  • the selected SMF is used to manage the PDU session initiated by the UE in step 4.
  • each network element in FIG. 7 can interactively execute steps 3-20 of the PDU session establishment process in the existing standard to establish a PDU session.
  • FIG. 8 another local area network communication method provided by this embodiment of the application can be regarded as a specific implementation manner of Embodiment 1.
  • the network information is DNN as an example.
  • NEF obtains the 5GLAN management request of AF.
  • OAM or NEF sends 5GLAN configuration parameters to UDM.
  • 5GLAN configuration parameters include DNN.
  • UDM After receiving the 5GLAN configuration parameters, UDM sends a request to NRF to obtain the SMF list for managing this session.
  • UDM receives the SMF list returned by NRF.
  • UDM selects an SMF ID from the SMF list, and establishes the association relationship between DNN and SMF ID. UDM inserts the association relationship into the UE subscription data indicated by the UE ID.
  • the SMF ID selected by UDM is the ID of the SMF for this session management.
  • the UE sends a NAS message to the AMF.
  • the NAS message can carry the PDU session ID and DNN.
  • the NAS message can be regarded as a PDU session establishment request.
  • DNN can be regarded as the information of the network requested by the terminal.
  • the DNN may contain the first indication information.
  • the AMF can determine according to the first indication information that the network indicated by the information of the network requested by the terminal supports the local area network service, and then determine that the subsequent steps are initiated and used by the terminal.
  • SMF network element is selected for establishing a PDU session for LAN communication.
  • the AMF may also determine that the NAS message carries the DNN reserved for 5GLAN type services through other implementations described in the first embodiment, which will not be repeated here.
  • the AMF sends a Nudm_SDM_Get request message to the UDM to request the UE's subscription data.
  • UDM sends Nudm_SDM_Get response message to AMF.
  • the Nudm_SDM_Get response message carries the subscription data of the UE, and the subscription data contains the association relationship between the DNN and the SMF ID.
  • the AMF authenticates the UE request according to the contract; and selects the SMF according to the above-mentioned association relationship and the DNN obtained from the NAS message.
  • the selected SMF is used to manage the PDU session initiated by the UE in step 6.
  • each network element in FIG. 8 can interactively execute steps 3-20 of the PDU session establishment procedure in the existing standard to establish a PDU session.
  • the SMF ID is determined by AMF as an example for introduction.
  • the NRF query can also be the SMF Set ID list, and the final AMF can also be the SMF. Set ID, and select SMF network elements according to SMF Set ID. The specific meaning and corresponding implementation of the SMF Set have been introduced above, and therefore will not be repeated in the embodiment.
  • FIG. 9 is a schematic flowchart of a local area network communication method provided by an embodiment of this application.
  • the NRF network element receives the SMF query request message sent by the AMF network element.
  • the SMF query request message is used to request to obtain the SMF identifier of the SMF network element that manages the PDU session requested by the terminal, and the SMF query request message carries information of the requested network.
  • the AMF network element may send an SMF query request message to the NRF network element after receiving the PDU session establishment request sent by the terminal.
  • the SMF query request message may be a Nnrf_NFDiscovery Request message.
  • the requested network information includes DNN; or includes DNN and S-NSSAI.
  • the NRF network element determines whether the network indicated by the requested network information supports LAN services.
  • the NRF network element determines whether the network indicated by the requested network information supports LAN services, that is, indicates that the requested network indication information supports LAN type services.
  • the NRF network element After the NRF network element determines that the network indicated by the requested network information supports LAN services, it will perform the following steps to select an SMF network element for the PDU session requested by the terminal, and initiate the PDU session for the terminal to establish LAN communication. To manage.
  • the NRF network element determines whether the network indicated by the requested network information supports the local area network service, which can be implemented in the foregoing multiple ways. I won't repeat it here.
  • the NRF network element obtains the SMF identifier according to the association relationship between the SMF identifier and the information of the network and the information of the requested network.
  • the SMF network element identified by the SMF identifier is used to manage the PDU session.
  • the NRF network element sends an SMF query response message to the AMF network element, and the SMF query response message carries the SMF identifier.
  • the SMF query response message may be a Nnrf_NFDiscoveryResponse message.
  • the NRF network element may obtain the foregoing association relationship before receiving the SMF query request message sent by the AMF network element.
  • the NRF network element can obtain the above-mentioned association relationship through the following two implementation methods.
  • the NRF network element can obtain the LAN configuration parameters and SMF identifier sent by the NEF network element or OAM entity.
  • the NRF network element After receiving the LAN configuration parameter and the SMF identifier, the NRF network element can save the association relationship between the SMF identifier and the information of the network corresponding to the LAN (that is, the information of the network carried in the LAN configuration parameter).
  • the NRF network element can obtain the association relationship in the following manner: before the NRF network element obtains the association relationship, the NRF network element receives the LAN configuration parameters sent by the NEF network element or the OAM entity, and the LAN configuration parameters include information about the network corresponding to the LAN.
  • the NRF network element selects an SMF for session management for the LAN; then, the NRF network element associates and stores the SMF selected by the NRF and the information of the network corresponding to the LAN to obtain the association relationship.
  • the information of the network corresponding to the LAN includes DNN; or includes DNN and S-NSSAI.
  • the NRF network element may first determine the candidate SMF identifier for managing the PDU session; then, select the SMF identifier from the candidate SMF identifiers; finally, establish the association relationship between the SMF identifier and network information.
  • the UDM network element can also directly obtain the SMF identifier after querying the NRF network element.
  • the LAN configuration parameters include the information of the network corresponding to the LAN, but the LAN configuration parameters do not clearly indicate the SMF identifier of the SMF network element used to manage the PDU session.
  • the NRF network element cannot directly obtain the above-mentioned association relationship, but needs to obtain candidate SMF identifiers through local query, and then select one of the SMF identifiers and establish the association relationship between the SMF identifier and network information.
  • the communication system includes an AMF network element and an NRF network element.
  • the AMF network element is used to perform related operations of the AMF network element in the second embodiment
  • the NRF network element is used to perform related operations of the NRF network element in the second embodiment.
  • the communication system shown in FIG. 10 further includes AF network elements and NEF network elements.
  • the AF network element is used to send LAN configuration parameters to the NRF network element through the NEF network element; the NEF network element is used to receive the LAN configuration parameters from the AF network element; and the LAN configuration parameters are sent to the NRF network element.
  • another local area network communication method provided by this embodiment of the application can be regarded as a specific implementation manner of the second embodiment.
  • the information of the network is DNN as an example.
  • NEF obtains the 5GLAN management request of AF.
  • the 5GLAN management request may include LAN configuration information and SMF ID, or may only include LAN configuration information.
  • the LAN configuration information includes DNN.
  • the SMF ID in the 5GLAN management request is used to indicate the SMF network element that manages the PDU session for LAN communication established by the member terminal corresponding to the LAN. If the SMF ID is not included in the 5GLAN management request, NEF can query the NRF network element and select an SMF ID from the SMF list returned by the NRF network element as a PDU for LAN communication established to the member terminal corresponding to the LAN SMF network element for session management.
  • OAM or NEF configures DNN and SMF ID to NRF.
  • NRF After receiving the configuration, NRF can save the association relationship between DNN and SMF ID.
  • NRF can directly obtain the association relationship.
  • the OAM or NEF only configures the DNN for the NRF, the NRF can establish the aforementioned association relationship by querying and selecting candidate SMF IDs.
  • the UE sends a NAS message to the AMF network element.
  • the AMF can interact with the UDM to obtain the subscription data of the UE. This process is an existing technology, and will not be repeated here.
  • the NAS message can carry the PDU session ID and DNN.
  • the NAS message can be regarded as a PDU session establishment request.
  • the DNN can be regarded as the network information requested by the terminal.
  • AMF sends Nnrf_NFDiscovery request message to NRF, which carries DNN.
  • NRF determines DNN; and selects SMF ID according to the association relationship saved in step 3.
  • the DNN may contain the first indication information.
  • the meaning of NRF determining DNN is that after receiving the DNN, NRF can determine according to the first indication information that the network indicated by the information of the network requested by the terminal supports LAN services, and then determine that the subsequent steps are initiated by the terminal and used to establish The SMF network element is selected for the PDU session of the LAN communication.
  • the NRF can also determine that the NAS message carries a DNN reserved for 5GLAN type services through other implementations introduced in the second embodiment, which will not be repeated here.
  • the NRF sends an Nnrf_NFDiscovery response message to the AMF, which carries the SMF ID selected in step 6.
  • each network element in FIG. 11 can interactively execute steps 3-20 of the PDU session establishment process in the existing standard to establish a PDU session.
  • FIG. 12 is a schematic flowchart of a local area network communication method provided by an embodiment of this application.
  • the AMF network element receives the PDU session establishment request sent by the terminal.
  • the PDU session establishment request carries the information of the requested network.
  • the requested network information may be DNN, S-NSSAI, or DNN+S-NSSAI.
  • the AMF network element determines whether the network indicated by the requested network information supports LAN services.
  • the AMF network element determines that the network indicated by the requested network information supports LAN services, which means that the PDU session initiated by the terminal this time requests a LAN type service.
  • the PDU session can be considered a LAN session, and the AMF network element can Perform subsequent steps to select an SMF network element for the LAN type service requested by the terminal, and manage the PDU session initiated by the terminal for establishing LAN communication.
  • the AMF network element may determine whether the network indicated by the requested network information supports LAN services in multiple ways. For details, please refer to the previous description, which will not be repeated here.
  • the SMF query request message carries information of the requested network and LAN indication information, and the LAN indication information is used to indicate that the network indicated by the requested network information supports local area network services.
  • the SMF query request message may be a Nnrf_NFDiscovery Request message.
  • the NRF network element determines to acquire the SMF identifier corresponding to the requested network information from the association relationship between the SMF identifier and the network information according to the LAN indication information.
  • the NRF network element determines, according to the LAN indication information in the SMF query request message, that the network indicated by the information of the network requested by the terminal supports the LAN service. Then, the NRF network element can perform subsequent steps to select an SMF network element for the PDU session requested by the terminal to manage the PDU session.
  • the NRF network element may first determine the candidate SMF identifier for managing the PDU session of the terminal in the LAN group when acquiring the SMF identifier; Select the SMF identifier from the candidate SMF identifiers; at the same time, the NRF network element can establish the above-mentioned association relationship.
  • the NRF network element when the NRF network element obtains the SMF identifier, it can determine the SMF identifier according to the previously saved association relationship and the requested network information.
  • the NRF network element can also obtain the foregoing association relationship by interacting with the NEF network element or the OAM entity by referring to the method described in Embodiment 1 or Embodiment 2, which will not be repeated here.
  • the NRF network element sends an SMF query response message to the AMF network element, and the SMF query response message carries the SMF identifier.
  • the SMF query response message may be a Nnrf_NFDiscoveryResponse message.
  • the communication system includes an AMF network element and an NRF network element.
  • the AMF network element is used to perform related operations of the AMF network element in the third embodiment
  • the NRF network element is used to perform related operations of the NRF network element in the third embodiment.
  • the communication system may also include an AF network element and a NEF network element, and the functions of both are the same as those of the AF network element and NEF network element in the second embodiment, which will not be repeated here.
  • FIG. 14 another local area network communication method provided by this embodiment of the application can be regarded as a specific implementation manner of Embodiment 2.
  • the information of the network is a DNN as an example.
  • NEF obtains the 5GLAN management request of AF.
  • the 5GLAN management request may include LAN configuration information and SMF ID, or may only include LAN configuration information, and the LAN configuration information includes DNN.
  • the SMF ID in the 5GLAN management request is used to indicate the SMF network element that manages the PDU session for LAN communication established by the member terminal corresponding to the LAN. If the SMF ID is not included in the 5GLAN management request, NEF can query the NRF network element and select an SMF ID from the SMF list returned by the NRF network element as a PDU for LAN communication established to the member terminal corresponding to the LAN SMF network element for session management.
  • OAM or NEF sends 5GLAN configuration parameters to NRF, including DNN.
  • OAM or NEF can also send SMF ID to NRF.
  • the UE sends a NAS message to the AMF.
  • the AMF can interact with the UDM to obtain SMF selection subscription data. This process is an existing technology, and will not be repeated here.
  • the NAS message can carry the PDU session ID and DNN.
  • the NAS message can be regarded as a PDU session establishment request.
  • the DNN can be regarded as the information of the network requested by the terminal.
  • the AMF can determine according to the first indication information in the DNN that the DNN is a DNN reserved for LAN-type services, and then determine that the subsequent steps are initiated by the terminal.
  • the SMF network element is selected for establishing the PDU session for LAN communication.
  • the AMF can also determine that the NAS message carries the DNN reserved for 5GLAN type services through the other methods described above, which will not be repeated here.
  • AMF sends Nnrf_NFDiscovery request message to NRF, which carries DNN and 5GLAN instructions.
  • the DNN carried in the Nnrf_NFDiscovery request message can be regarded as the information of the network requested by the terminal.
  • NRF queries the SMF list according to the instructions of the DNN and 5GLAN, selects the SMF ID from the SMF list; then saves the association relationship between the DNN and the SMF ID.
  • the NRF can determine that the Nnrf_NFDiscovery request message carries the DNN reserved for 5GLAN type services, that is, it determines that the network indicated by the information of the network requested by the terminal supports the LAN service, so as to perform the subsequent steps, as The PDU session initiated by the terminal selects the SMF network element.
  • the NRF sends the Nnrf_NFDiscovery response message to the AMF, which carries the SMF ID selected in step 6.
  • each network element in FIG. 14 can interactively execute steps 3-20 of the PDU session establishment procedure in the existing standard to establish a PDU session.
  • Another member UEs in the 5GLAN group corresponding to the DNN initiates a session establishment request.
  • AMF can interact with UDM to obtain UE subscription data.
  • AMF sends an Nnrf_NFDiscovery request message to NRF, which carries DNN and 5GLAN indications.
  • NRF selects SMF ID based on DNN and the saved association relationship.
  • the NRF can determine that the Nnrf_NFDiscovery request message carries the DNN reserved for the 5GLAN type service, so as to perform the subsequent steps to select the SMF network element for the PDU session initiated by the terminal.
  • the NRF sends the Nnrf_NFDiscovery response message to the AMF, which carries the SMF ID selected in step 9.
  • the SMF ID selected in step 9 is the SMF ID selected in step 6.
  • each network element in FIG. 14 can interactively execute steps 3-20 of the PDU session establishment procedure in the existing standard to establish a PDU session.
  • the first embodiment implements the solution of the application through the interaction of AMF network elements and UDM network elements
  • the second and third embodiments both implement the solution of the application through the interaction of AMF network elements and NRF network elements.
  • the difference between the second embodiment and the third embodiment is that in the second embodiment, after receiving the PDU session establishment request, the AMF network element does not determine whether the network indicated by the information of the network requested by the terminal supports the LAN service, but Send an SMF query request message to the NRF network element as in the prior art, and then the NRF network element determines whether the network indicated by the network information requested by the terminal supports the network according to the local configuration or according to the first indication information in the requested network information LAN business, and then execute the follow-up process.
  • the AMF network element after receiving the PDU session establishment request, the AMF network element first determines whether the network indicated by the network information requested by the terminal supports LAN services, and then carries a LAN indication information in the SMF query request message.
  • the element can determine, according to the LAN indication information, that the network indicated by the information of the network requested by the terminal supports the LAN service, and then execute the subsequent process.
  • the difference between the first embodiment and the third embodiment is that, in the first embodiment, after the AMF network element determines that the network indicated by the information of the network requested by the terminal supports the LAN service, it directly determines the SMF based on the terminal's subscription data, and does not need to The SMF ID is requested from the NRF network element in the prior art; in the third embodiment, after the AMF network element determines that the network indicated by the information of the network requested by the terminal supports LAN services, it still requests the SMF ID from the NRF network element as in the prior art. However, when requesting the SMF ID from the NRF network element, one more LAN indication information is carried compared to the prior art.
  • an embodiment of the present application also provides a local area network communication device, which can be used to perform the function of the AMF network element in the method shown in the first embodiment.
  • the local area network communication device 1500 includes a receiving unit 1501 and a processing unit 1502.
  • the receiving unit 1501 is configured to receive a meta PDU session establishment request sent by a terminal, and the PDU session establishment request carries information of the requested network;
  • the processing unit 1502 is configured to determine whether the network indicated by the requested network information supports LAN services; in the case that the network indicated by the requested network information supports LAN services, according to the association relationship between the SMF identifier and the network information and the request The information of the network to obtain the SMF identifier for managing the PDU session.
  • the requested network information includes DNN; or, DNN and S-NSSAI.
  • the receiving unit 1501 is further configured to obtain the contract data of the terminal from the UDM network element, where the contract data of the terminal includes the association relationship.
  • the receiving unit 1501 obtains the contract data of the terminal from the UDM network element, it is specifically configured to obtain the contract data of the terminal from the UDM network element in the registration process of the terminal.
  • the receiving unit 1501 is specifically configured to: obtain the contract data of the terminal from the UDM network element in the process of updating the contract document of the terminal.
  • the information of the requested network includes the first indication information of whether the indicated network supports LAN services; the processing unit 1502 specifically uses the information when determining whether the network indicated by the requested network information supports LAN services. Yu: According to the first indication information, determine whether the network indicated by the requested network information supports LAN services.
  • the processing unit 1502 when determining whether the network indicated by the requested network information supports LAN services, is specifically configured to: according to local configuration information, determine whether the requested network information supports the LAN service. Service; or, according to the subscription data of the terminal, determine whether the network indicated by the requested network information supports LAN services; or, the PDU session establishment request also includes the second indication information that the network indicated by the requested network information supports LAN services , According to the second indication information, it is determined that the network indicated by the requested network information supports the LAN service.
  • an embodiment of the present application also provides a local area network communication device, which can be used to perform the function of the UDM network element in the method shown in the first embodiment.
  • the local area network communication device 1600 includes a receiving unit 1601 and a processing unit 1602.
  • the receiving unit 1601 is configured to receive a data update request sent by an OAM entity or NEF network element, the data update request includes LAN configuration parameters, and the LAN configuration parameters include the identification of the LAN, the information of the network corresponding to the LAN, and the member list corresponding to the LAN;
  • the processing unit 1602 is configured to save the association relationship between the SMF identifier and the information of the network corresponding to the LAN in the subscription data of the terminal indicated by the member list corresponding to the LAN; wherein, the SMF network element corresponding to the SMF identifier is used to correspond to the LAN.
  • the SMF network element that manages the PDU session of the terminal indicated by the member list.
  • the information of the network corresponding to the LAN includes DNN; or, DNN and S-NSSAI.
  • the data update request also includes the SMF identifier.
  • the NEF network element obtains the SMF identifier through the NRF network element.
  • the device 1600 further includes a sending unit, configured to send a subscription data update notification to the AMF network element, and the subscription data update notification includes an association relationship.
  • an embodiment of the present application also provides a local area network communication device, which can be used to perform the function of the NRF network element in the method shown in the second embodiment.
  • the local area network communication device 1700 includes a receiving unit 1701, a processing unit 1702, and a sending unit 1703.
  • the receiving unit 1701 is configured to receive an SMF query request message sent by an AMF network element, the SMF query request message is used to request to obtain an SMF identifier for managing the PDU session requested by the terminal, and the SMF query request message carries information of the requested network;
  • the processing unit 1702 is configured to determine whether the network indicated by the requested network information supports LAN services; in the case that the network indicated by the requested network information supports LAN services, according to the association relationship between the SMF identifier and the network information and the request To obtain the SMF identifier for managing the PDU session requested by the terminal;
  • the sending unit 1703 is configured to send an SMF query response message to the AMF network element, and the SMF query response message carries the SMF identifier.
  • the information of the network corresponding to the LAN or the information of the requested network may include: DNN; or, DNN and S-NSSAI.
  • the receiving unit 1701 is further configured to: before receiving the SMF query request message sent by the AMF network element, receive the LAN configuration parameters sent by the NEF network element or the OAM entity, where the LAN configuration parameters include information about the network corresponding to the LAN; the processing unit 1702 also Used to: select the SMF for session management for the LAN; associate and store the SMF selected by the NRF and the information of the network corresponding to the LAN to obtain the association relationship.
  • the receiving unit 1701 is further configured to obtain LAN configuration parameters and SMF identifiers sent by the NEF network element or OAM entity, where the LAN configuration parameters include information about the network corresponding to the LAN. Therefore, an association relationship between the SMF identifier and the information of the network corresponding to the LAN can be established.
  • the information of the requested network includes the first indication information of whether the indicated network supports the LAN service; when the processing unit 1702 determines whether the network indicated by the requested network information supports the LAN service, Specifically, it is used to determine whether the network indicated by the requested network information supports LAN services according to the first indication information.
  • the processing unit 1702 when determining whether the network indicated by the requested network information supports LAN services, is specifically configured to:
  • the local configuration information it is determined whether the network indicated by the requested network information supports LAN services.
  • an embodiment of the present application also provides a local area network communication device, which can be used to perform the function of the AMF network element in the method shown in the third embodiment.
  • the local area network communication device 1800 includes a receiving unit 1801, a processing unit 1802, and a sending unit 1803.
  • the receiving unit 1801 is configured to receive a PDU session establishment request sent by a terminal, and the PDU session establishment request carries information of the requested network.
  • the processing unit 1802 is configured to determine whether the network indicated by the requested network information supports LAN services.
  • the sending unit 1803 is configured to send an SMF query request message to the NRF network element when the network indicated by the requested network information supports the LAN service.
  • the SMF query request message carries the requested network information and LAN indication information.
  • the indication information is used to indicate that the network indicated by the requested network information supports LAN services.
  • the receiving unit 1801 is further configured to receive an SMF query response message sent by an NRF network element, and the SMF query response message includes an SMF identifier for managing the PDU session requested by the terminal.
  • the requested network information may include DNN; or, DNN and S-NSSAI.
  • the information of the requested network includes the first indication information of whether the indicated network supports LAN services; when the processing unit 1802 determines whether the network indicated by the requested network information supports LAN services, Specifically, it is used to determine whether the network indicated by the requested network information supports LAN services according to the first indication information.
  • the processing unit 1802 when determining whether the network indicated by the requested network information supports LAN services, is specifically configured to: according to the local configuration information, determine whether the requested network information indicates whether the network Support local area network services; or, according to the subscription data of the terminal, determine whether the network indicated by the requested network information supports the local area network service; or, the PDU session establishment request also includes the second part of the network indicated by the requested network information that supports the local area network service.
  • the indication information according to the second indication information, determines that the network indicated by the requested network information supports the local area network service.
  • an embodiment of the present application also provides a local area network communication device, which can be used to perform the function of the NRFF network element in the method shown in the third embodiment.
  • the local area network communication device 1900 includes a receiving unit 1901, a processing unit 1902, and a sending unit 1903.
  • the receiving unit 1901 is configured to receive the SMF query request message sent by the AMF network element.
  • the SMF query request message is used to request to obtain the SMF identifier for managing the PDU session requested by the terminal.
  • the SMF query request message carries the requested network information and LAN indication information, which is used to indicate that the network indicated by the requested network information supports local area network services;
  • the processing unit 1902 is configured to determine, according to the LAN indication information, to obtain the SMF identifier corresponding to the requested network information from the association relationship between the SMF identifier and the network information;
  • the sending unit 1902 is configured to send an SMF query response message to the AMF network element, and the SMF query response message carries the acquired SMF identifier.
  • the receiving unit 1901 is further configured to: before receiving the SMF query request message sent by the AMF network element, receive the LAN configuration parameters sent by the NEF network element or the OAM entity, where the LAN configuration parameters include information about the network corresponding to the LAN; processing unit 1902 is also used to: select an SMF for session management for the LAN; associate and store the SMF selected by the NRF and the information of the network corresponding to the LAN to obtain an association relationship.
  • the division of the units in the embodiments of the present application is schematic, and is only a division of logical functions. In actual implementation, there may be other ways of division.
  • the functional units in the embodiments of the present application may be integrated in one process. In the device, it can also exist alone physically, or two or more units can be integrated into one module.
  • the above integrated unit may be implemented in the form of hardware or software function module.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium.
  • the technical solution of the present application essentially or part of the contribution to the existing technology or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , Including several instructions to enable a terminal device (which may be a personal computer, mobile phone, or network device, etc.) or processor to execute all or part of the steps of the method in various embodiments of the present application.
  • the foregoing storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes .
  • the AMF network element, UDM network element, and NRF network element can be presented in the form of dividing each functional module in an integrated manner.
  • the "module” herein may refer to a specific ASIC, circuit, processor and memory that execute one or more software or firmware programs, integrated logic circuits, and/or other devices that can provide the above-mentioned functions.
  • AMF network element UDM network element
  • NRF network element can all adopt the form shown in FIG. 20.
  • the local area network communication device 2000 as shown in FIG. 20 includes at least one processor 2001, a memory 2002, and optionally, a communication interface 2003.
  • the memory 2002 may be a volatile memory, such as random access memory; the memory may also be a non-volatile memory, such as read-only memory, flash memory, hard disk drive (HDD) or solid-state drive (solid-state drive, SSD) or the memory 2002 is any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.
  • the memory 2002 may be a combination of the above-mentioned memories.
  • the embodiment of the present application does not limit the specific connection medium between the processor 2001 and the memory 2002.
  • the memory 2002 and the processor 2001 are connected through a bus 2004, and the bus 2004 is represented by a thick line in the figure.
  • the connection mode between other components is only for schematic illustration and is not cited Is limited.
  • the bus 2004 can be divided into an address bus, a data bus, a control bus, and so on. For ease of presentation, only one thick line is used to represent in FIG. 20, but it does not mean that there is only one bus or one type of bus.
  • the processor 2001 may have a data transceiver function and can communicate with other devices.
  • an independent data transceiver module such as a communication interface 2003, may be used to send and receive data; the processor 2001 is communicating with other devices. When communicating, data can be transmitted through the communication interface 2003.
  • the processor 2001 in FIG. 20 can call the computer to execute instructions stored in the memory 2002, so that the AMF network element can execute the AMF network element in any of the foregoing method embodiments. Method of execution.
  • the functions/implementation processes of the sending unit, the receiving unit, and the processing unit in FIG. 15 can all be implemented by the processor 2001 in FIG. 20 calling a computer execution instruction stored in the memory 2002.
  • the function/implementation process of the processing unit in FIG. 15 may be implemented by the processor 2001 in FIG. 20 calling a computer execution instruction stored in the memory 2002, and the function/implementation process of the sending unit and the receiving unit in FIG. 15 may be implemented by The communication interface 2003 in Figure 20 is implemented.
  • the functions/implementation processes of the sending unit, the receiving unit, and the processing unit in FIG. 18 can all be implemented by the processor 2001 in FIG. 20 calling a computer execution instruction stored in the memory 2002.
  • the function/implementation process of the processing unit in FIG. 18 may be implemented by the processor 2001 in FIG. 20 calling computer execution instructions stored in the memory 2002, and the function/implementation process of the sending unit and the receiving unit in FIG. 18 may be implemented by The communication interface 2003 in Figure 20 is implemented.
  • the processor 2001 in FIG. 20 can invoke the computer execution instructions stored in the memory 2002, so that the UDM network element can execute the UDM network in any of the foregoing method embodiments. Meta-execution method.
  • the functions/implementation processes of the sending unit, the receiving unit, and the processing unit in FIG. 16 can all be implemented by the processor 2001 in FIG. 20 calling the computer execution instructions stored in the memory 2002.
  • the function/implementation process of the processing unit in FIG. 16 may be implemented by the processor 2001 in FIG. 20 calling a computer execution instruction stored in the memory 2002, and the function/implementation process of the sending unit and the receiving unit in FIG. 16 may be implemented by The communication interface 2003 in Figure 20 is implemented.
  • the processor 2001 in FIG. 20 can call the computer execution instructions stored in the memory 2002, so that the NRF network element can execute the NRF network in any of the foregoing method embodiments. Meta-execution method.
  • the functions/implementation processes of the receiving unit, the sending unit, and the processing unit in FIG. 17 can all be implemented by the processor 2001 in FIG. 20 calling the computer execution instructions stored in the memory 2002.
  • the function/implementation process of the processing unit in FIG. 17 may be implemented by the processor 2001 in FIG. 20 calling a computer execution instruction stored in the memory 2002, and the function/implementation process of the receiving unit and the sending unit in FIG. 17 may be implemented by The communication interface 2003 in Figure 20 is implemented.
  • the functions/implementation processes of the receiving unit, the sending unit, and the processing unit in FIG. 19 can all be implemented by the processor 2001 in FIG. 20 calling a computer execution instruction stored in the memory 2002.
  • the function/implementation process of the processing unit in FIG. 19 can be implemented by the processor 2001 in FIG. 20 calling computer execution instructions stored in the memory 2002, and the function/implementation process of the receiving unit and the sending unit in FIG. 19 can be implemented by The communication interface 2003 in Figure 20 is implemented.
  • These computer program instructions may also be stored in a computer readable memory that can guide a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, the instructions
  • the device implements the functions specified in one block or multiple blocks of the flowchart one flow or multiple flows and/or block diagrams.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operating steps are performed on the computer or other programmable device to generate computer-implemented processing, which is executed on the computer or other programmable device
  • the instructions provide steps for implementing the functions specified in one block or multiple blocks of the flowchart one flow or multiple flows and/or block diagrams.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a dedicated computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be from a website site, computer, server or data center Transmission to another website, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device including one or more available medium integrated servers, data centers, and the like.
  • the usable medium may be a magnetic medium (eg, floppy disk, hard disk, magnetic tape), optical medium (eg, DVD), or semiconductor medium (eg, solid state disk (SSD)), or the like.

Abstract

本申请实施例公开了一种局域网通信方法、装置及系统，用以在终端发起PDU会话时，为终端选择SMF网元。方法包括：AMF网元接收终端发送的PDU会话建立请求，PDU会话建立请求中携带请求的网络的信息；AMF网元确定请求的网络的信息所指示的网络是否支持局域网业务；在请求的网络的信息所指示的网络支持局域网业务的情况下，AMF网元根据SMF标识与网络的信息的关联关系以及请求的网络的信息，获取对PDU会话进行管理的SMF标识。

Description

一种局域网通信方法、装置及系统
相关申请的交叉引用
本申请要求在2019年01月15日提交中国专利局、申请号为201910036573.2、申请名称为“一种局域网通信方法、装置及系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种局域网通信方法、装置及系统。
背景技术
5G局域网(local area network，LAN)服务是5G网络提供的一种服务，能够为属于同一LAN群组的终端(user equipment，UE)提供互联网协议(internet protocol，IP)类型或者非IP类型的私有通信。UE可依据业务需求或者专有属性加入一个LAN群组，属于该LAN群组的UE可以使用5GLAN类型服务进行通信。
5GLAN类型服务可提供UE和UE之间的点对点的数据传输，在进行数据传输之前，需要在两个UE的协议数据单元(protocol data unit，PDU)会话之间建立关联。同一LAN群组内的所有UE连接到5GLAN的会话都在同一个会话管理功能(session management function，SMF)网元的管理控制下。UE发起PDU会话时，只有为LAN群组内的所有UE选择同一个SMF网元，才能在该SMF网元的管理下，实现LAN群组内UE之间的数据交换。
因此，当UE发起5GLAN会话时，如何为UE选择SMF网元是一个亟需解决的问题。
发明内容
本申请实施例提供一种局域网通信方法、装置及系统，用以在UE发起PDU会话时，为UE选择SMF网元。
第一方面，本申请实施例提供一种局域网通信方法，该方法包括如下步骤：接入和移动性管理功能AMF网元接收终端发送的协议数据单元PDU会话建立请求，所述PDU会话建立请求中携带请求的网络的信息；所述AMF网元确定所述请求的网络的信息所指示的网络是否支持局域网业务；在所述请求的网络的信息所指示的网络支持局域网业务的情况下，所述AMF网元根据会话管理功能SMF标识与网络的信息的关联关系以及所述请求的网络的信息，获取对所述PDU会话进行管理的SMF标识。
其中，请求的网络的信息可以包括数据网络名称DNN；或者，DNN和单个网络切片选择辅助信息S-NSSAI。
采用上述方案，AMF网元确定所述请求的网络的信息所指示的网络是否支持局域网业务后，可以根据关联关系获取SMF标识，该SMF标识所标识的SMF网元可用于对LAN群组内终端发起的、用于建立局域网通信的PDU会话进行管理。由于关联关系是SMF标识与网络的信息的关联关系，因而对于LAN群组内的所有终端，在该终端发起PDU会话 建立请求后，AMF网元均根据上述关联关系确定SMF标识，从而为LAN群组内的每个终端选择同一个SMF标识。也就是说，采用上述方案，可以在终端发起PDU会话时，为同一LAN群组内的所有终端选择同一SMF网元进行会话管理。
此外，在该方法中，AMF网元可以从统一数据管理UDM网元获取终端的签约数据，其中，终端的签约数据中包括关联关系。
在一种可能的实现方式中，AMF网元从统一数据管理UDM网元获取终端的签约数据，具体为：AMF网元在终端的注册流程中，从统一数据管理UDM网元获取终端的签约数据。
采用上述方案，可以在终端的注册流程中获取上述关联关系。
在另一种可能的实现方式中，AMF网元从统一数据管理UDM网元获取终端的签约数据，具体为：UDM网元接收来自应用功能NEF网元或者操作维护管理OAM实体的数据更新请求，数据更新请求中包含LAN配置参数和SMF标识，LAN配置参数中包含LAN的标识、LAN对应的网络的信息和LAN对应的成员列表；UDM网元将SMF标识和LAN对应的网络的信息的关联关系保存到终端的签约数据中；UDM网元向AMF网元发送关联关系；AMF网元接收关联关系。
采用上述方案，若LAN配置时未将上述关联关系配置在终端的签约数据中或者上述关联关系发生了更新，则可以通过上述方案将关联关系保存至终端的签约数据中，再通过UDM网元发送签约数据的过程将该关联关系发送至AMF网元。
在第一方面提供的局域网通信方法中，AMF网元可通过如下方法确定请求的网络的信息所指示的网络是否支持局域网业务：请求的网络的信息包括其所指示的网络是否支持局域网业务的第一指示信息；AMF网元根据第一指示信息，确定请求的网络的信息所指示的网络是否支持局域网业务。
采用上述方案，AMF网元直接根据请求的网络的信息确定请求的网络的信息所指示的网络是否支持局域网业务。
在第一方面提供的局域网通信方法中，AMF网元可通过如下方法确定请求的网络的信息所指示的网络是否支持局域网业务：AMF网元根据本地配置信息，确定请求的网络的信息所指示的网络是否支持局域网业务；或者，AMF网元根据终端的签约数据，确定请求的网络的信息所指示的网络是否支持局域网业务；或者，PDU会话建立请求还包括请求的网络的信息所指示的网络支持局域网业务的第二指示信息，AMF网元根据第二指示信息，确定请求的网络的信息所指示的网络支持局域网业务。
采用上述方案，AMF网元根据请求的网络的信息之外的其他信息确定请求的网络的信息所指示的网络是否支持局域网业务。
第二方面，本申请实施例提供一种局域网通信方法，包括：UDM网元接收操作维护管理OAM实体或者网络开放功能NEF网元发送的数据更新请求，数据更新请求中包括LAN配置参数，LAN配置参数包含LAN的标识、LAN对应的网络的信息和LAN对应的成员列表；UDM网元将SMF标识和LAN对应的网络的信息的关联关系保存至LAN对应的成员列表所指示的终端的签约数据中；其中，SMF标识对应的SMF网元为用于对LAN对应的成员列表所指示的终端的PDU会话进行管理的SMF网元。
进一步地，UDM网元还可以向AMF网元发送签约数据更新通知，签约数据更新通知包括关联关系。
其中，LAN对应的网络的信息可以包括数据网络名称DNN；或者，DNN和单个网络 切片选择辅助信息S-NSSAI。
采用上述方案，UDM网元可通过数据更新请求将上述关联关系配置到终端的签约数据中，AMF网元可根据该关联关系获取SMF标识，该SMF标识所标识的SMF网元可用于对LAN群组内终端发起的、用于建立局域网通信的PDU会话进行管理。由于关联关系是SMF标识与网络的信息的关联关系，因而对于LAN群组内的所有终端，在该终端发起PDU会话建立请求后，AMF网元均根据上述关联关系确定SMF标识，从而为LAN群组内的每个终端选择同一个SMF标识。也就是说，采用上述方案，可以在终端发起PDU会话时，为同一LAN群组内的所有终端选择同一SMF网元进行会话管理。
此外，数据更新请求中还包括SMF标识。
其中，该SMF标识可以是NEF网元通过网络功能存储库功能NRF网元获取的SMF标识。
若数据更新请求中包括SMF标识，则UDM网元可直接确定SMF标识与LAN对应的网络的信息的关联关系。若数据更新请求中不包括SMF标识，则UDM网元可通过查询NRF网元获取该SMF标识，然后再建立该关联关系。
第三方面，本申请实施例提供一种局域网通信方法，该方法包括如下步骤：NRF网元接收AMF网元发送的SMF查询请求消息，SMF查询请求消息用于请求获取对终端请求建立的PDU会话进行管理的SMF标识，SMF查询请求消息携带请求的网络的信息；NRF网元确定请求的网络的信息所指示的网络是否支持局域网业务；在请求的网络的信息所指示的网络支持局域网业务的情况下，NRF网元根据SMF标识与网络的信息的关联关系以及请求的网络的信息，获取对终端请求建立的PDU会话进行管理的SMF标识；NRF网元向AMF网元发送SMF查询响应消息，SMF查询响应消息中携带SMF标识。
其中，LAN对应的网络的信息或者请求的网络的信息包括：DNN；或者，DNN和S-NSSAI。
采用上述方案，NRF网元确定所述请求的网络的信息所指示的网络是否支持局域网业务后，可以根据关联关系获取SMF标识，该SMF标识所标识的SMF网元可用于对LAN群组内终端发起的、用于建立局域网通信的PDU会话进行管理。由于关联关系是SMF标识与网络的信息的关联关系，因而对于LAN群组内的所有终端，在NRF网元接收到SMF查询请求消息后，NRF网元均根据上述关联关系确定SMF标识，从而为LAN群组内的每个终端选择同一个SMF标识。也就是说，采用上述方案，可以在终端发起PDU会话时，为同一LAN群组内的所有终端选择同一SMF网元进行会话管理。
在一种可能的实现方式中，在NRF网元接收AMF网元发送的SMF查询请求消息之前，还包括：接收NEF网元或OAM实体发送的LAN配置参数，LAN配置参数包含LAN对应的网络的信息；为LAN选择进行会话管理的SMF；关联存储NRF选择的SMF与LAN对应的网络的信息，得到关联关系。
采用上述方案，提供了一种NRF网元获取上述关联关系的方案。
在一种可能的实现方式中，NRF网元获取NEF网元或OAM实体发送的LAN配置参数和SMF标识，LAN配置参数中包括LAN对应的网络的信息；因而NRF可建立SMF标识与LAN对应的网络的信息的关联关系。
采用上述方案，提供了另一种NRF网元获取上述关联关系的方案。
此外，NRF网元确定请求的网络的信息所指示的网络是否支持局域网业务，具体可通 过如下方式实现：请求的网络的信息包括其所指示的网络是否支持局域网业务的第一指示信息；NRF网元根据第一指示信息，确定请求的网络的信息所指示的网络是否支持局域网业务。
采用上述方案，NRF网元直接根据请求的网络的信息确定请求的网络的信息所指示的网络是否支持局域网业务。
此外，NRF网元确定请求的网络的信息所指示的网络是否支持局域网业务，具体可通过如下方式实现：NRF网元根据本地配置信息，确定请求的网络的信息所指示的网络是否支持局域网业务。
采用上述方案，NRF网元根据请求的网络的信息之外的其他信息确定请求的网络的信息所指示的网络是否支持局域网业务。
第四方面，本申请实施例提供一种局域网通信方法，该方法包括如下步骤：AMF网元接收终端发送的PDU会话建立请求，PDU会话建立请求中携带请求的网络的信息；AMF网元确定请求的网络的信息所指示的网络是否支持局域网业务；在请求的网络的信息所指示的网络支持局域网业务的情况下，AMF网元向NRF网元发送SMF查询请求消息，SMF查询请求消息中携带请求的网络的信息以及LAN指示信息，LAN指示信息用于指示请求的网络的信息所指示的网络支持局域网业务；AMF网元接收NRF网元发送的SMF查询响应消息，SMF查询响应消息中包括对终端请求建立的PDU会话进行管理的SMF标识。
其中，请求的网络的信息包括DNN；或者，DNN和S-NSSAI。
采用上述方案，AMF网元确定所述请求的网络的信息所指示的网络支持局域网业务后，可以向NRF网元发送LAN指示信息。NRF网元接收到LAN指示信息后，确定请求的网络的信息所指示的网络支持局域网业务，然后可以根据关联关系获取SMF标识，该SMF标识所标识的SMF网元可用于对LAN群组内终端发起的、用于建立局域网通信的PDU会话进行管理。由于关联关系是SMF标识与网络的信息的关联关系，因而对于LAN群组内的所有终端，在NRF网元接收到SMF查询请求消息后，NRF网元均根据上述关联关系确定SMF标识，从而为LAN群组内的每个终端选择同一个SMF标识。也就是说，采用上述方案，可以在终端发起PDU会话时，为同一LAN群组内的所有终端选择同一SMF网元进行会话管理。
此外，AMF网元确定请求的网络的信息所指示的网络是否支持局域网业务，具体可通过如下方式实现：请求的网络的信息包括其所指示的网络是否支持局域网业务的第一指示信息；AMF网元根据第一指示信息，确定请求的网络的信息所指示的网络是否支持局域网业务。
采用上述方案，AMF网元直接根据请求的网络的信息确定请求的网络的信息所指示的网络是否支持局域网业务。
此外，AMF网元确定请求的网络的信息所指示的网络是否支持局域网业务，还可通过如下方式实现：AMF网元根据本地配置信息，确定请求的网络的信息所指示的网络是否支持局域网业务；或者，AMF网元根据终端的签约数据，确定请求的网络的信息所指示的网络是否支持局域网业务；或者，PDU会话建立请求还包括请求的网络的信息所指示的网络支持局域网业务的第二指示信息，AMF网元根据第二指示信息，确定请求的网络的信息所指示的网络支持局域网业务。
采用上述方案，AMF网元根据请求的网络的信息之外的其他信息确定请求的网络的信 息所指示的网络是否支持局域网业务。
第五方面，本申请实施例提供一种局域网通信方法，该方法包括如下步骤：NRF网元接收AMF网元发送的SMF查询请求消息，SMF查询请求消息用于请求获取对终端请求建立的PDU会话进行管理的SMF标识，SMF查询请求消息中携带请求的网络的信息以及LAN指示信息，LAN指示信息用于指示请求的网络的信息所指示的网络支持局域网业务；NRF网元根据LAN指示信息，确定从SMF标识与网络的信息的关联关系中获取与请求的网络的信息对应的SMF标识；NRF网元向AMF网元发送SMF查询响应消息，SMF查询响应消息中携带获取的SMF标识。
采用上述方案，NRF网元接收到LAN指示信息后，确定所述请求的网络的信息所指示的网络是否支持局域网业务，然后可以根据关联关系获取SMF标识，该SMF标识所标识的SMF网元可用于对LAN群组内终端发起的、用于建立局域网通信的PDU会话进行管理。由于关联关系是SMF标识与网络的信息的关联关系，因而对于LAN群组内的所有终端，在NRF网元接收到SMF查询请求消息后，NRF网元均根据上述关联关系确定SMF标识，从而为LAN群组内的每个终端选择同一个SMF标识。也就是说，采用上述方案，可以在终端发起PDU会话时，为同一LAN群组内的所有终端选择同一SMF网元进行会话管理。
在一种可能的设计中，在NRF网元接收AMF网元发送的SMF查询请求消息之前，该方法还包括：NRF网元接收NEF网元或OAM实体发送的LAN配置参数，LAN配置参数包含LAN对应的网络的信息；为LAN选择进行会话管理的SMF；关联存储NRF选择的SMF和LAN对应的网络的信息，得到关联关系。
采用上述方案，提供了一种NRF网元获取上述关联关系的方案。
此外，NRF网元中的关联关系还可由AF网元通过NEF网元提供，或者由OAM实体提供，此处不再赘述。
第六方面，本申请实施例还提供了一种局域网通信装置，所述局域网通信装置应用于AMF网元，有益效果可以参见第一方面的描述此处不再赘述。该装置具有实现上述第一方面的方法实例中行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。在一个可能的设计中，所述装置的结构中包括接收单元、处理单元和发送单元，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。
第七方面，本申请实施例还提供了一种局域网通信装置，所述局域网通信装置应用于UDM网元，有益效果可以参见第二方面的描述此处不再赘述。该装置具有实现上述第二方面的方法实例中行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。在一个可能的设计中，所述装置的结构中包括接收单元和发送单元，还可以包括处理单元，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。
第八方面，本申请实施例还提供了一种局域网通信装置，所述局域网通信装置应用于NRF网元，有益效果可以参见第三方面的描述此处不再赘述。该装置具有实现上述第三方面的方法实例中行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。在一个可能的设计中，所述装置的结构中包括接收单元、处理单元和发送单元，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。
第九方面，本申请实施例还提供了一种局域网通信装置，所述局域网通信装置应用于AMF网元，有益效果可以参见第四方面的描述此处不再赘述。该装置具有实现上述第四方面的方法实例中行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。在一个可能的设计中，所述装置的结构中包括接收单元、处理单元和发送单元，这些单元可以执行上述第四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。
第十方面，本申请实施例还提供了一种局域网通信装置，所述局域网通信装置应用于NRF网元，有益效果可以参见第五方面的描述此处不再赘述。该装置具有实现上述第五方面的方法实例中行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。在一个可能的设计中，所述装置的结构中包括接收单元、处理单元和发送单元，这些单元可以执行上述第五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。
第十一方面，本申请实施例还提供了一种局域网通信装置，所述局域网通信装置应用于AMF网元，有益效果可以参见第一方面的描述此处不再赘述。所述局域网通信装置的结构中包括处理器和存储器，所述处理器被配置为支持所述终端执行上述第一方面方法中相应的功能。所述存储器与所述处理器耦合，其保存所述局域网通信装置必要的程序指令和数据。所述局域网通信装置的结构中还包括通信接口，用于与其他设备进行通信。
第十二方面，本申请实施例还提供了一种局域网通信装置，所述局域网通信装置应用于UDM网元，有益效果可以参见第二方面的描述此处不再赘述。所述局域网通信装置的结构中包括处理器和存储器，所述处理器被配置为支持所述终端执行上述第二方面方法中相应的功能。所述存储器与所述处理器耦合，其保存所述局域网通信装置必要的程序指令和数据。所述局域网通信装置的结构中还包括通信接口，用于与其他设备进行通信。
第十三方面，本申请实施例还提供了一种局域网通信装置，所述局域网通信装置应用于NRF网元，有益效果可以参见第三方面的描述此处不再赘述。所述局域网通信装置的结构中包括处理器和存储器，所述处理器被配置为支持所述终端执行上述第三方面方法中相应的功能。所述存储器与所述处理器耦合，其保存所述局域网通信装置必要的程序指令和数据。所述局域网通信装置的结构中还包括通信接口，用于与其他设备进行通信。
第十四方面，本申请实施例还提供了一种局域网通信装置，所述局域网通信装置应用于AMF网元，有益效果可以参见第四方面的描述此处不再赘述。所述局域网通信装置的结构中包括处理器和存储器，所述处理器被配置为支持所述终端执行上述第四方面方法中相应的功能。所述存储器与所述处理器耦合，其保存所述局域网通信装置必要的程序指令和数据。所述局域网通信装置的结构中还包括通信接口，用于与其他设备进行通信。
第十五方面，本申请实施例还提供了一种局域网通信装置，所述局域网通信装置应用于NRF网元，有益效果可以参见第五方面的描述此处不再赘述。所述局域网通信装置的结构中包括处理器和存储器，所述处理器被配置为支持所述终端执行上述第五方面方法中相应的功能。所述存储器与所述处理器耦合，其保存所述局域网通信装置必要的程序指令和数据。所述局域网通信装置的结构中还包括通信接口，用于与其他设备进行通信。
第十六方面，本申请实施例提供一种局域网通信系统，包括AMF网元和UDM网元。
UDM网元，用于接收OAM实体或者NEF网元发送的数据更新请求，数据更新请求 中包括LAN配置参数，LAN配置参数包含LAN的标识、LAN对应的网络的信息和LAN对应的成员列表；将SMF标识和LAN对应的网络的信息的关联关系保存至LAN对应的成员列表所指示的终端的签约数据中；其中，SMF标识对应的SMF网元为用于对LAN对应的成员列表所指示的终端的PDU会话进行管理的SMF网元；向AMF网元发送关联关系。
AMF网元，用于接收来自UDM网元的关联关系；接收第一终端发送的PDU会话建立请求，PDU会话建立请求中携带请求的网络的信息，第一终端为LAN对应的成员列表所指示的终端中的任意一个终端；确定请求的网络的信息所指示的网络是否支持局域网业务；在请求的网络的信息所指示的网络支持局域网业务的情况下，根据关联关系以及请求的网络的信息，获取对第一终端请求建立的PDU会话进行管理的SMF标识。
在一种可能的设计中，该局域网通信系统还包括AF网元和NEF网元：AF网元，用于向NEF网元发送LAN管理请求，LAN管理请求中携带LAN配置参数；NEF网元，用于接收LAN管理请求；向UDM网元发送数据更新请求。
在一种可能的设计中，数据更新请求中还包括对LAN对应的成员列表所指示的终端的PDU会话进行管理的SMF标识。
在一种可能的设计中，NEF网元还用于：通过NRF网元，获取对LAN对应的成员列表所指示的终端的PDU会话进行管理的SMF标识。
在一种可能的设计中，请求的网络的信息包括其所指示的网络是否支持局域网业务的第一指示信息；AMF网元在确定请求的网络的信息所指示的网络是否支持局域网业务时，具体用于：根据第一指示信息，确定请求的网络的信息所指示的网络是否支持局域网业务。
在一种可能的设计中，AMF网元在确定请求的网络的信息所指示的网络是否支持局域网业务时，具体用于：根据本地配置信息，确定请求的网络的信息所指示的网络是否支持局域网业务；或者，根据终端的签约数据，确定请求的网络的信息所指示的网络是否支持局域网业务；或者，PDU会话建立请求还包括请求的网络的信息所指示的网络支持局域网业务的第二指示信息；根据第二指示信息，确定请求的网络的信息所指示的网络支持局域网业务。
在一种可能的设计中，LAN对应的网络的信息或者请求的网络的信息包括DNN；或者，DNN和S-NSSAI。
第十七方面，本申请实施例提供一种通信系统，包括NRF网元和AMF网元。
AMF网元，用于接收终端发送的PDU会话建立请求，PDU会话建立请求中携带请求的网络的信息；向NRF网元发送SMF查询请求消息，SMF查询请求消息用于请求获取对终端请求建立的PDU会话进行管理的SMF标识，SMF查询请求消息携带请求的网络的信息。
NRF网元，用于接收AMF网元发送的SMF查询请求消息；确定请求的网络的信息所指示的网络是否支持局域网业务；在请求的网络的信息所指示的网络支持局域网业务的情况下，根据SMF标识与网络的信息的关联关系以及请求的网络的信息，获取对终端请求建立的PDU会话进行管理的SMF标识。
在一种可能的设计中，NRF网元还用于：接收NEF网元或OAM实体发送的LAN配置参数，LAN配置参数包含LAN对应的网络的信息；为LAN选择进行管理的SMF；关联存储NRF选择的SMF和LAN对应的网络的信息，得到关联关系。
在一种可能的设计中，该局域网通信系统还包括：AF网元，用于向通过NEF网元向NRF网元发送LAN配置参数；NEF网元，用于接收来自AF网元的LAN配置参数；向NRF网元发送LAN配置参数。
在一种可能的设计中，请求的网络的信息包括其所指示的网络是否支持局域网业务的第一指示信息；NRF网元在确定请求的网络的信息所指示的网络是否支持局域网业务时，具体用于：根据第一指示信息，确定请求的网络的信息所指示的网络是否支持局域网业务。
在一种可能的设计中，NRF网元在确定请求的网络的信息所指示的网络是否支持局域网业务时，具体用于：根据本地配置信息，确定请求的网络的信息所指示的网络是否支持局域网业务。
在一种可能的设计中，LAN对应的网络的信息或者请求的网络的信息包括DNN；或者，DNN和S-NSSAI。
第十八方面，本申请实施例提供一种通信系统，包括AMF网元和NRF网元。
AMF网元，用于接收终端发送的PDU会话建立请求，PDU会话建立请求中携带请求的网络的信息；确定请求的网络的信息所指示的网络是否支持局域网业务；在请求的网络的信息所指示的网络支持局域网业务的情况下，向NRF网元发送SMF查询请求消息，SMF查询请求消息用于请求中携带请求的网络的信息以及LAN指示信息，LAN指示信息用于指示请求的网络的信息所指示的网络支持局域网业务。
NRF网元，用于接收AMF网元发送的SMF查询请求消息；根据LAN指示信息，确定从SMF标识与网络的信息的关联关系中获取与请求的网络的信息对应的SMF标识；向AMF网元发送SMF查询响应消息，SMF查询响应消息中携带获取的SMF标识。
在一种可能的设计中，NRF网元还用于：接收NEF网元或OAM实体发送的LAN配置参数，LAN配置参数包含LAN对应的网络的信息；为LAN选择进行会话管理的SMF；关联存储NRF选择的SMF和LAN对应的网络的信息，得到关联关系。
在一种可能的设计中，请求的网络的信息包括其所指示的网络是否支持局域网业务的第一指示信息；AMF网元在确定请求的网络的信息所指示的网络是否支持局域网业务时，具体用于：根据第一指示信息，确定请求的网络的信息所指示的网络是否支持局域网业务。
在一种可能的设计中，AMF网元在确定请求的网络的信息所指示的网络是否支持局域网业务时，具体用于：根据本地配置信息，确定请求的网络的信息所指示的网络是否支持局域网业务；或者，根据终端的签约数据，确定请求的网络的信息所指示的网络是否支持局域网业务；或者，PDU会话建立请求还包括请求的网络的信息所指示的网络支持局域网业务的第二指示信息；根据第二指示信息，确定请求的网络的信息所指示的网络支持局域网业务。
在一种可能的设计中，LAN对应的网络的信息或者请求的网络的信息包括DNN；或者，DNN和S-NSSAI。
第十九方面，本申请还提供一种计算机可读存储介质，所述计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行上述各方面所述的方法。
第二十方面，本申请还提供一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述各方面所述的方法。
第二十一方面，本申请还提供一种计算机芯片，所述芯片与存储器相连，所述芯片用于读取并执行所述存储器中存储的软件程序，执行上述各方面所述的方法。
附图说明
图1为本申请实施例提供的第一种网络架构的结构示意图；
图2为本申请实施例提供的第二种网络架构的结构示意图；
图3为本申请实施例提供的第三种网络架构的结构示意图；
图4为本申请实施例提供的第一种局域网通信方法的流程示意图；
图5为本申请实施例提供的第二种局域网通信方法的流程示意图；
图6为本申请实施例提供的第一种局域网通信系统的结构示意图；
图7为本申请实施例提供的第三种局域网通信方法的流程示意图；
图8为本申请实施例提供的第四种局域网通信方法的流程示意图；
图9为本申请实施例提供的第五种局域网通信方法的流程示意图；
图10为本申请实施例提供的第二种局域网通信系统的结构示意图；
图11为本申请实施例提供的第六种局域网通信方法的流程示意图；
图12为本申请实施例提供的第七种局域网通信方法的流程示意图；
图13为本申请实施例提供的第三种局域网通信系统的结构示意图；
图14为本申请实施例提供的第八种局域网通信方法的流程示意图；
图15～20为本申请实施例提供的一种局域网通信装置的结构示意图。
具体实施方式
为了使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请作进一步地详细描述。方法实施例中的具体操作方法也可以应用于装置实施例或系统实施例中。
参阅图1所示，为本申请适用的一种可能的网络架构示意图。该网络架构为5G网络架构。该网络架构中的网元包括终端、接入网(access network，AN)、核心网(Core)以及数据网络(data network，DN)。其中，接入网可以为无线接入网(radio access network，RAN)。在该网络架构中，终端、AN和Core是构成该网络架构的主要部分。对于AN和Core中的网元来说，从逻辑上可以分为用户面和控制面两部分，控制面负责移动网络的管理，用户面负责业务数据的传输。例如，在图1所示的网络架构中，NG2参考点位于RAN控制面和Core控制面之间，NG3参考点位于RAN用户面和Core用户面之间，NG6参考点位于Core用户面和DN之间。
在图1所示的网络架构中，终端是一种具有无线收发功能的设备，是移动用户与网络交互的入口，能够提供基本的计算能力，和存储能力，并向用户显示业务窗口、接受用户操作输入。在5G通信系统中，终端会采用新空口技术与AN建立信号连接和数据连接，从而传输控制信号和业务数据到网络。
具体地，终端可以部署在陆地上，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)。所述终端可以是手机(mobile phone)、平板电脑(pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端、增强现实(augmented reality，AR)终端、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等。
在图1所示的网络架构中，AN类似于传统通信网络里面的基站，部署在靠近终端的位置，为特定区域的授权用户提供入网功能，并能够根据用户的级别、业务的需求等确定不同质量的传输隧道来传输用户数据。AN能够管理并合理利用自身的资源，按需为终端提供接入服务，并负责把控制信号和业务数据在终端和Core之间转发。
在图1所示的网络架构中，Core负责维护移动网络的签约数据、管理移动网络的网元，并为终端提供会话管理、移动性管理、策略管理、安全认证等功能。例如，在终端附着的时候，为终端提供入网认证；在终端有业务请求时，为终端分配网络资源；在终端移动的时候，为终端更新网络资源；在终端空闲的时候，为终端提供快恢复机制；在终端去附着的时候，为终端释放网络资源；在终端有业务数据时，为终端提供数据路由功能，如转发上行数据到DN，或者从DN接收下行数据并转发到AN。
在图1所示的网络架构中，DN是为用户提供业务服务的数据网络。实际通信过程中，客户端通常位于终端，服务端通常位于DN。DN可以是私有网络，如局域网，也可以是不受运营商管控的外部网络，如Internet，还可以是运营商共同部署的专有网络，如提供IP多媒体网络子系统(IP multimedia core network subsystem，IMS)服务的网络。
参阅图2所示，为本申请适用的一种具体的网络架构示意图。该网络架构为5G网络架构。该5G架构中的网元包括终端、无线接入网(radio access network，RAN)和数据网络(data network，DN)，图2中以终端为用户设备(user equipment，UE)为例。此外，该网络架构还包括核心网网元，核心网网元包括用户面功能(user plane function，UPF)网元和控制面功能网元。具体地，控制面功能网元包括但不限于接入和移动性管理功能(access and mobility management function，AMF)网元、会话管理功能(session management function，SMF)网元、认证服务器功能(authentication server function，AUSF)网元、应用功能(application function，AF)网元、统一数据管理(unified data management，UDM)网元、策略控制功能(policy control function，PCF)网元、网络开放功能网元(network exposure function，NEF)网元、NF存储库功能(NF repository function，NRF)网元和网络切片选择功能(network slice selection function，NSSF)网元。
可选地，在该网络架构中，控制面功能网元还可以包括局域网服务管理功能网元(LAN service management function，LSMF)。
实际应用中，LSMF网元可以作为独立的物理功能实体，也可以作为部署在其他网元(例如NEF网元，PCF网元，UDM网元，SMF网元)中的逻辑功能实体。
需要说明的是，在传统的核心网架构中，控制面功能网元之间采用点对点通信方式，即控制面功能网元之间的接口通信采用一套特定的消息，接口两端的控制面功能网元仅能使用这套特定的消息进行通信。而在5G核心网架构中，控制面采用服务化架构，即控制面功能网元之间的交互采用服务调用的方式，控制面功能网元会向其他控制面功能网元开放服务，供其他控制面功能网元调用。
下面对图2所示的网络架构中各网元的功能进行详细介绍。由于UE、RAN以及DN的功能在图1所示网络架构的相关描述中已经介绍过，下面重点介绍各个核心网网元的功能。
UPF网元是用户面的功能网元，主要负责连接外部网络，其包括了长期演进(long term evolution，LTE)的服务网关(serving gateway，SGW)和分组数据网网关(packet data network  gateway，PDN-GW)的相关功能。具体地，UDF可以根据SMF的路由规则执行用户数据包转发，如上行数据发送到DN或其他UPF；下行数据转发到其他UPF或者RAN。
AMF网元负责UE的接入管理和移动性管理，例如负责UE的状态维护、UE的可达性管理、非移动性管理接入层(mobility management non-access-stratum，MM NAS)消息的转发、会话管理(session management，SM)N2消息的转发。在实际应用中，AMF网元可实现LTE网络框架中MME里的移动性管理功能，还可实现接入管理功能。
SMF网元负责会话管理，为UE的会话分配资源、释放资源；其中资源包括会话服务质量(quality of service，QoS)、会话路径、转发规则等。
AUSF网元用于执行UE的安全认证。
AF网元可以是第三方的应用控制平台，也可以是运营商自己的设备，AF网元可以为多个应用服务器提供服务。
UDM网元可存储UE的签约信息。
PCF网元用于进行用户策略管理，类似于LTE中的策略与计费规则功能(policy and charging rules function，PCRF)网元，主要负责策略授权、服务质量以及计费规则的生成，并将相应规则通过SMF网元下发至UPF网元，完成相应策略及规则的安装。
NEF网元用于以北向应用程序编程接口(application programming interface，API)的方式向第三方开放网络功能。
NRF网元用于为其他网元提供网络功能实体信息的存储和选择功能。
NSSF网元用于为UE选择网络切片。
在图2所示的网络架构中还可包含LSMF网元。LSMF网元用于进行LAN类型服务区管理。
其中，与本申请有关的网元主要包括：UE、AMF、SMF、UDM、NRF和NEF。
需要说明的是，本申请实施例将AMF、SMF、UDM、NRF和NEF等称为网元仅为一种示意。实际中，网元也可以称为实例或者网络功能实体。例如，UDM网元也可以称为UDM实例、UDM网络功能实体；AMF网元也可以称为AMF实例、AMF网络功能实体。
同样需要说明的是，本申请实施例中所述的UDM网元在实现其功能时可以通过和同一数据仓储(unified data repository，UDR)网元交互实现，UDR网元用于存储UDM网元执行其操作时所需的数据，UDM网元用于与其他网元进行交互。例如，可将SMF标识与请求的网络的信息之间的关联关系、终端的SMF选择签约数据等数据作为签约数据或者应用数据保存在UDR网元中。实际实现时，UDR网元和UDM网元可以是两个独立的物理实体，UDR网元也可集成在UDM网元中，本申请实施例对比不做具体限定。
具体地，支持5GLAN类型服务的网络架构可以如图3所示。在图3中，UE建立到UPF节点的会话，从而接入到5GLAN的用户面；UDM网元/UDR网元主要提供5GLAN类型服务的管理功能；在UE发起会话后，采用本申请实施例提供的方案选择SMF网元，选择的SMF网元负责对UE发起的会话进行管理。
下面，对本申请实施例涉及的基本概念进行解释。需要说明的是，这些解释是为了让本申请更容易被理解，而不应该视为对本申请所要求的保护范围的限定。
一、SMF标识
本申请实施例中，SMF标识(也可以称为SMF ID)所标识的SMF网元用于对终端发起的PDU会话进行管理。具体地，从格式上来说，SMF标识可以是字符串，可以是地址 (例如IP地址)，也可以是全量域名标识符(fully qualified domain name，FQDN)。
如背景技术中所述，同一LAN群组内的所有终端连接到5GLAN的会话都在同一个SMF网元的管理控制下。终端发起5GLAN会话时，需要为该LAN群组内的所有终端选择同一个SMF网元，才能在该SMF网元的管理下实现LAN群组内终端之间的数据交换。
此外，需要说明的是，本申请实施例中所述的SMF标识也可以替换为SMF集合(SMF Set)标识。SMF Set中可以包含多个SMF网元，每个SMF网元共享上下文，一个SMF Set中的多个SMF网元互为备份，即一个SMF Set中的多个SMF网元可以相互协同，在某个SMF网元崩溃的情况下，SMF Set中的其他SMF网元可替代该SMF网元。那么，不难理解，对于同一LAN群组内的终端，可通过SMF Set中的任一SMF网元对该终端发起的、用于建立局域网通信的PDU会话进行管理。
示例性地，若SMF Set中包含四个SMF网元，即SMF1、SMF2、SMF3和SMF4；LAN群组内的终端A发起PDU会话时，可由SMF1、SMF2、SMF3和SMF4中的任一SMF网元对该PDU会话进行管理，例如可以是SMF1；终端A再次发起新的PDU会话时，可由SMF1、SMF2、SMF3和SMF4中的任一SMF网元对该PDU会话进行管理，例如可以是SMF2。
也就是说，若采用本申请实施例提供的局域网通信方案获取到SMF ID，则可通过该SMF ID所标识的SMF网元对终端发起的、用于建立局域网通信的PDU会话进行管理；若采用本申请实施例提供的方案获取到SMF Set ID，则可通过该SMF Set ID所标识的SMF Set中的任一SMF网元对终端发起的、用于建立局域网通信的PDU会话进行管理。在本申请实施例的描述中，均以获取SMF ID为例进行介绍，关于获取SMF Set ID的实现方式不再赘述。
二、网络的信息
本申请实施例中，PDU会话建立请求中携带的网络的信息可以用于指示终端在发起PDU会话时所请求访问的网络。例如，可以指示终端的PDU会话对应的数据网络名称(如DNN)，或者也可以指示终端的PDU会话对应的网络切片信息(如S-NSSAI)和数据网络名称。
从格式上来说，网络的信息可以是全量域名(fully qualified domain name，FQDN)、单个切换选择辅助信息(single network slice selection assistance information,S-NSSAI)、虚拟局域网(virtual local area network，VLAN)标识(VLAN identity，VID)、字符串、字符串、内部组标识(internal group identifier)、外部组标识(external group identifier)、序列号，也可以是特殊的域名，例如数据网络名称(data network name，DNN)。此外，网络的信息还可采用一些特殊的格式，例如网络的信息中还可包括提供商信息、运营商信息、网络信息、域信息等。特别地，网络的信息还可以是上述各种选项的组合，如DNN+S-NSSAI。
本申请实施例的实施目的是为LAN群组中的终端选择用于进行PDU会话管理的SMF网元，因而在网络侧(例如AMF网元)接收到终端的PDU会话建立请求后，只有在确定终端此次发起的PDU会话是要请求LAN类型服务(即确定终端请求的网络的信息所指示的网络支持局域网业务)的情况下，才会根据本申请实施例提供的方案为该PDU会话选择SMF网元。具体地，确定方式可以有如下两种。
第一种方式：根据网络的信息中的第一指示信息直接确定。
以网络的信息为DNN为例，DNN中的第一指示信息可以用来指示该DNN是为LAN 类型服务预留的。例如，DNN中的某些域可以用来标识LAN类别，某些域可以用来标识LAN的组信息。那么，LAN类别信息和LAN的组信息可以视为第一指示信息，网络侧(例如AMF网元或NRF网元)在接收到该DNN之后，即可直接根据DNN中的第一指示信息确定终端请求的网络的信息所指示的网络支持局域网业务。
以网络的信息为DNN+S-NSSAI为例，DNN中的某些域可以用来标识LAN类别，S-NSSAI中的某些域可以用来标识LAN的组信息；或者，DNN中的某些域可以用来标识，LAN的组信息S-NSSAI中的某些域可以用来标识LAN类别。那么，LAN类别信息和LAN的组信息可以视为第一指示信息，网络侧(例如AMF网元或NRF网元)在接收到DNN+S-NSSAI之后，即可直接根据其中的第一指示信息确定终端请求的网络的信息所指示的网络支持局域网业务。
第二种方式：根据网络的信息之外的其他信息确定。
在第二种方式中，AMF网元或NRF网元可以根据本地配置信息确定网络的信息所指示的网络是否支持局域网业务；该本地配置信息例如可以是一个列表，该列表记载了所有支持局域网业务的网络的信息的集合。当终端请求的网络的信息包含在该列表中时，则表明终端请求的网络的信息所指示的网络支持局域网业务。例如，AMF网元或NRF网元上预先配置有上述本地配置信息，当AMF网元或NRF网元接收到终端发送的PDU会话建立请求中携带的网络的信息时，根据该预先配置的本地配置信息，确定终端请求的网络的信息所指示的网络支持局域网业务。在这种方式中，支持局域网业务的网络是运营商为LAN特别预留的。
在第二种方式中，AMF网元还可以根据终端的签约数据确定网络的信息所指示的网络是否支持局域网业务。例如终端的签约数据中还可包括相应指示信息，以指示网络的信息所指示的网络是否支持局域网业务。
此外，当AMF网元接收到终端的PDU会话建立请求时，根据PDU会话建立请求中请求的网络的信息查询是否存在一个SMF标识与该请求的网络的信息的关联关系，如果存在，则确定终端请求的网络的信息所指示的网络支持局域网业务。
在第二种方式中，AMF网元也可以根据终端发送的PDU会话建立请求中携带的第二指示信息来确定终端请求的网络的信息所指示的网络支持局域网业务。具体地，第二指示信息可以是请求类型信息(request type)、会话类型信息(session type)或新信元(information element,IE)(如LAN标识)中的一个或者多个。例如，在PDU会话建立请求中可以在现有技术的基础上新增一个信元(如5GLAN ID或者5GLAN指示)，用于指示PDU会话建立请求中请求的网络的信息所指示的网络支持局域网业务。
需要说明的是，在后面对本申请实施例的介绍中，上述三种方式可能部分适用也可能全部适用，具体情况将在后面的实施例中进行详细介绍。
三、LAN标识
LAN标识可以理解为一个LAN群组的标识，也可以称为LAN标识。也就是说，LAN标识可用于标识一个LAN群组或者一个特定的LAN类型服务。用同一LAN标识标识的终端属于同一LAN群组，可以使用该LAN标识对应的LAN类型服务，即用同一LAN标识标识的终端之间可以进行LAN通信。在5G网络架构下，LAN标识也可以称为5GLAN标识。
示例性地，终端在发起会话时，可以在PDU会话建立请求这一非接入层 (non-access-stratum，NAS)消息中携带LAN标识，以指示该终端属于该LAN标识对应的LAN群组。操作维护管理(operation administration and maintenance，OAM)实体或者AF网元通过NEF网元向UDM网元或者NRF网元发送的LAN配置参数中也可以携带LAN标识，以指示该LAN配置参数用于对该LAN标识对应的LAN群组进行配置。其中，OAM实体是运营商网管系统中的配置接口，面向运营商；运营商可以直接通过OAM实体在移动网络中的网元上配置参数。
四、LAN配置参数(也可以称为5GLAN配置参数)
LAN配置参数可以由AF网元通过NEF网元提供，也可以由OAM实体提供。LAN配置参数中可以包括如下参数中的一种或多种：
(1)LAN标识(也可以称为组标识符)，用来在5G网络中定义5GLAN群组；
(2)LAN对应的网络的信息，用来标识该LAN群组对应的网络，例如可以包括DNN，或者包括DNN+S-NSSAI；
(3)LAN对应的成员列表，用于指示LAN群组内的成员终端；
(4)LAN配置参数中还可以包括PDU会话类型信息。
UDM网元(或者NRF网元)接收到5GLAN配置参数后，可以将5GLAN配置参数中的相关数据写入LAN群组内每个成员终端的签约数据中。
特别地，为了便于为5GLAN群组内的终端发起的用于建立局域网通信的PDU会话选择同一个SMF网元进行会话管理，可以将SMF标识与LAN对应的网络的信息的关联关系写入LAN的每一个成员终端的签约数据中。同时，可选的，也可以在终端的签约数据中指示LAN对应的网络的信息所指示的网络支持局域网业务。SMF的标识可以由NEF网元或者OAM实体提供，也可以有NEF网元或者UDM网元查询NRF网元获取，本申请实施例不做限定。
五、关联关系
本申请实施例中，关联关系即SMF标识与网络的信息之间的关联关系。其中，该SMF标识所标识的SMF网元用于对终端发起的、用于建立局域网通信的PDU会话进行管理。
如前所述，同一LAN群组内的所有终端发起的用于建立局域网通信的PDU会话都需要在同一个SMF网元(或者同一个SMF set)的管理控制下。
此外，建立上述关联关系后，若LAN群组内的任一终端再次发起会话时，则同样可根据该关联关系为该终端选择同一SMF网元，使得LAN群组内所有终端请求LAN类型服务时，PDU会话均由同一SMF网元管理。
本申请实施提供一种局域网通信方法、装置及系统，用以在终端发起PDU会话时，为终端选择SMF网元。
需要说明的是，本申请中所涉及的多个，是指两个或两个以上。另外，需要理解的是，在本申请的描述中，“第一”、“第二”等词汇，仅用于区分描述的目的，而不能理解为指示或暗示相对重要性，也不能理解为指示或暗示顺序。
下面，将分别三个实施例对本申请提供的局域网通信方案进行介绍。
实施例一
参见图4，为本申请实施例提供的局域网通信方法的流程示意图。
S401：AMF网元接收终端发送的PDU会话建立请求。
其中，该PDU会话建立请求中携带请求的网络的信息。示例性地，该请求的网络的信息可以是DNN，可以是S-NSSAI，也可以是DNN+S-NSSAI。
S402：AMF网元确定请求的网络的信息所指示的网络是否支持局域网业务。
其中，AMF网元确定请求的网络的信息所指示的网络支持局域网业务，即表示终端此次发起的PDU会话时请求的是LAN类型服务，该PDU会话可以认为是LAN会话，AMF网元则可执行后续步骤，从而按照本申请实施例的方法为终端发起的PDU会话建立请求选择一个SMF网元。
需要说明的是，本申请实施例中，终端不能同时为请求的网络的信息签约局域网业务和其他非局域网业务。
具体地，S402中，AMF网元确定请求的网络的信息所指示的网络是否支持局域网业务的方式可以有多种。具体可以参见上面的描述，这里不再赘述。
S403：在请求的网络的信息所指示的网络支持局域网业务的情况下，AMF网元根据SMF标识与网络的信息的关联关系以及请求的网络的信息获取SMF标识。
其中，SMF标识所标识的SMF网元用于对终端发起的、用于建立局域网通信的PDU会话进行管理。
AMF网元中可以从UDM网元获取终端的签约数据，终端的签约数据中携带上述关联关系。
一种可能的实现方式中，AMF网元可以在终端的注册流程中获取上述签约数据。
可选地，上述关联关系可以携带在SMF选择签约数据中，SMF选择签约数据是终端的签约数据的一部分。
另一种可能的实现方式中，AMF网元向UDM网元发送Nudm_SDM_Get Request消息，以请求获取终端的签约数据，其中携带请求的网络的信息、终端的标识，还可以携带签约数据类型信息(subscription data type)。UDM网元在接收到Nudm_SDM_Get Request消息后，可以向AMF网元发送Nudm_SDM_Get Response消息，其中携带终端的签约数据。
另一种可能的实现方式中，AMF网元可以在终端的签约文档更新通知流程(Subscription Profile Update Notification procedure)中从UDM网元获取上述关联关系。现有技术中，AMF网元通过订阅的方式，从UDM网元获取更新的签约数据。即当UDM网元中某个终端的签约数据发生变化后，UDM网元会通过通知消息(例如Nudm_SDM_Notification Notify message)将更新的签约数据告诉AMF网元。
在上述实现方式中，UDM网元向AMF网元发送上述关联关系之前，首先要获取上述关联关系；然后，UDM网元将该关联关系保存在LAN群组内每一个成员终端的签约数据中。可选的，可以将该关联关系保存在LAN群组中每一个成员终端的SMF选择签约数据(SMF selection subscription data)中。
因此，对于LAN群组中的每个成员终端，在该终端的签约数据中均保存有该关联关系，那么，在AMF网元接收到LAN群组内任一终端发送的用于建立局域网通信的PDU会话建立请求后，AMF网元均可从该终端的签约数据中获取该关联关系，进而为LAN群组内所有终端发起的用于建立局域网通信的PDU会话选择同一SMF网元进行管理。采用这种方案，AMF网元不必像现有技术那样去NRF网元查询管理PDU会话的SMF ID list，而是直接从签约数据中获取该关联关系，进而根据该关联关系以及终端请求的网络的信息确定用于对终端此次发起的、用于建立局域网通信的PDU会话进行管理的SMF网元的 SMF标识。
具体实现时，UDM网元可通过多种方式获取上述关联关系。
UDM接收AF网元通过NEF网元发送的数据更新请求；或者UDM网元接收OAM实体发送的数据更新请求。数据更新请求中携带LAN配置参数，其中，LAN配置参数的定义如上面所述，这里不再赘述。
一种可能的实现方式中，该数据更新请求中还包括SMF标识。UDM网元接收到数据更新请求之后，将SMF标识和LAN对应的网络的信息(即LAN配置参数中携带的网络的信息)的关联关系保存至LAN对应成员列表指示的每一个终端的签约数据中。
另一种可能的实现方式中，该数据更新请求中不包括SMF标识；这种情况下，可以有如下两种可能的方式获取所述关联关系：(1)NEF网元根据数据更新请求查询NRF网元，获取对终端发起的会话进行管理的候选SMF标识；NEF网元选择候选SMF标识中的一个作为SMF标识(NRF网元也可以直接只返回一个SMF标识)；然后，NEF网元向UDM网元发送SMF标识与所述LAN配置参数；UDM网元将SMF标识和LAN对应的网络的信息的关联关系保存至LAN对应成员列表指示的每一个终端的签约数据中。(2)UDM接收到数据更新请求之后，根据数据更新请求查询NRF网元，获取对终端发起的会话进行管理的候选SMF标识；UDM网元选择候选SMF标识中的一个作为SMF标识(NRF网元也可以直接只返回一个SMF标识)；UDM网元将SMF标识和LAN对应的网络的信息的关联关系保存至LAN对应成员列表指示的每一个终端的签约数据中。
进一步地，UDM网元可向AMF网元发送签约数据更新通知，签约数据更新通知中包括该关联关系。那么，在终端发送PDU会话建立请求后，可根据更新后的关联关系确定SMF标识。
采用上述实现方式时，实施例一提供的局域网通信方法可以如图5所示。在图5所示的方法中，UDM网元接收NEF网元发送的数据更新请求，该数据更新请求中携带LAN配置参数和SMF标识。其中，LAN配置参数包括LAN对应的网络的信息。UDM网元在接收到数据更新请求后将SMF标识和LAN对应的网络的信息的关联关系保存在LAN成员终端的签约数据中，并通过签约数据更新通知将更新后的签约数据通知到AMF网元。AMF网元在接收到终端的PDU会话建立请求后即可根据更新后的签约数据中的关联关系来确定SMF标识。
此外，在实施例一中，还提供一种通信系统，如图6所示，该通信系统包括AMF网元和UDM网元。
其中，UDM网元用于执行实施例一中UDM网元的相关操作，AMF网元用于执行实施例一中AMF网元的相关操作。
可选地，图6所示的通信系统还包括AF网元和NEF网元。
其中，AF网元用于向NEF网元发送LAN管理请求，LAN管理请求中携带LAN配置参数。NEF网元用于接收LAN管理请求；向UDM网元发送数据更新请求。
其中，该数据更新请求中还包括对LAN对应的成员列表所指示的终端的PDU会话进行管理的SMF标识。
参见图7，为本申请实施例提供的另一局域网通信方法，该方法可视为实施例一的一种具体实现方式，该方法中以网络的信息为DNN为例。该方法包括如下步骤：
1、NEF获取AF的5GLAN管理请求。
其中，该5GLAN管理请求中可以包括LAN配置信息与SMF ID，也可以仅包括LAN配置信息，例如，LAN配置信息中包含DNN。5GLAN管理请求中SMF ID用于指示对LAN对应的成员终端建立的用于局域网通信的PDU会话进行管理的SMF网元。若该5GLAN管理请求中不包含SMF ID，则NEF可通过查询NRF，并从NRF网元返回的SMF list中选择一个SMF ID，作为对LAN对应的成员终端建立的用于局域网通信的PDU会话进行管理的SMF网元。
2、OAM或NEF向UDM配置DNN、SMF ID、UE ID。
除了DNN之外，OAM或NEF还可向UDM配置如前所述的其他5GLAN配置参数，由于其他5GLAN配置参数与本申请实施例的方案相关性较小，此处不再赘述。
3、UDM在接收到该配置后，可在UE ID指示的UE签约数据中保存DNN和SMF ID的关联关系。
4、UE向AMF网元发送NAS消息。
其中，NAS消息可携带PDU会话ID、DNN。该NAS消息可以视为PDU会话建立请求。
其中，DNN可以视为终端请求的网络的信息。DNN中可以包含第一指示信息，AMF在接收到该DNN后即可根据第一指示信息判断确定终端请求的网络的信息所指示的网络支持局域网业务，进而确定执行后续步骤，为终端发起的、用于建立局域网通信的PDU会话选择SMF网元。
此外，AMF也可通过实施例一中描述的其他实现方式确定NAS消息中携带的是为5GLAN类型服务预留的DNN，此处不再赘述。
5、可选地，如果AMF本地没有保存UE的签约数据，AMF向UDM发送Nudm_SDM_Get请求消息，以请求获取签约数据。
6、UDM向AMF发送Nudm_SDM_Get响应消息。
其中，Nudm_SDM_Get响应消息中携带UE签约数据，该UE签约数据中包含DNN与SMF ID的关联关系。
7、AMF根据签约认证UE请求；并根据上述关联关系以及从NAS消息中获取的DNN选择SMF。选择的SMF用于对UE在步骤4中发起的PDU会话进行管理。
然后，图7中各网元可交互执行现有标准中PDU会话建立流程的步骤3～20，以建立PDU会话。
参见图8，为本申请实施例提供的另一局域网通信方法，该方法可视为实施例一的一种具体实现方式，该方法中以网络的信息为DNN为例。
1、NEF获取AF的5GLAN管理请求。
2、OAM或NEF向UDM发送5GLAN配置参数。
其中，5GLAN配置参数中包含DNN。
3、UDM在接收到5GLAN配置参数后，向NRF发送请求，以获取对此次会话进行管理的SMF list。
4、UDM接收NRF返回的SMF list。
5、UDM从SMF list中选择一个SMF ID，并建立DNN与SMF ID的关联关系。UDM把关联关系插入到UE ID指示的UE签约数据中。
其中，UDM选择的SMF ID即为进行此次会话管理的SMF的ID。
6、UE向AMF发送NAS消息。
其中，NAS消息可携带PDU会话ID、DNN。该NAS消息可以视为PDU会话建立请求。
其中，DNN可以视为终端请求的网络的信息。DNN中可以包含第一指示信息，AMF在接收到该DNN后即可根据第一指示信息判断确定终端请求的网络的信息所指示的网络支持局域网业务，进而确定执行后续步骤为终端发起的、用于建立局域网通信的PDU会话选择SMF网元。
此外，AMF也可通过实施例一中描述的其他实现方式确定NAS消息中携带的是为5GLAN类型服务预留的DNN，此处不再赘述。
7、可选地，如果AMF本地没有保存UE的签约数据，AMF向UDM发送Nudm_SDM_Get请求消息，以请求获取UE的签约数据。
8、UDM向AMF发送Nudm_SDM_Get响应消息。
其中，Nudm_SDM_Get响应消息中携带UE的签约数据，该签约数据中包含DNN与SMF ID的关联关系。
9、AMF根据签约认证UE请求；并根据上述关联关系以及从NAS消息中获取的DNN选择SMF。选择的SMF用于对UE在步骤6中发起的PDU会话进行管理。
然后，图8中各网元可交互执行现有标准中PDU会话建立流程的步骤3～20，以建立PDU会话。
需要说明的是，在本申请实施例的描述中，均为AMF确定SMF ID为例来进行介绍，实际实现时，NRF查询得到的也可以是SMF Set ID list，AMF最终确定的也可以是SMF Set ID，并根据SMF Set ID选择SMF网元。关于SMF Set的具体含义及相应实现方式在前面已介绍，因此实施例中不再赘述。
实施例二
参见图9，为本申请实施例提供的局域网通信方法的流程示意图。
S901：NRF网元接收AMF网元发送的SMF查询请求消息。
其中，SMF查询请求消息用于请求获取对终端请求建立的PDU会话进行管理的SMF网元的SMF标识，SMF查询请求消息携带请求的网络的信息。
具体地，AMF网元可以在接收到终端发送的PDU会话建立请求后向NRF网元发送SMF查询请求消息。
示例性地，SMF查询请求消息可以是Nnrf_NFDiscovery Request消息。请求的网络的信息包括DNN；或者包括DNN和S-NSSAI。
S902：NRF网元确定请求的网络的信息所指示的网络是否支持局域网业务。
其中，NRF网元确定请求的网络的信息所指示的网络是否支持局域网业务，即表示请求的网络的指示信息支持LAN类型服务。
NRF网元确定请求的网络的信息所指示的网络支持局域网业务后，会执行后续步骤，从而为终端请求建立的PDU会话选择一个SMF网元，对终端发起的、用于建立局域网通信的PDU会话进行管理。
其中，NRF网元确定请求的网络的信息所指示的网络是否支持局域网业务，可通过前 述多种方式实现。这里不再赘述。
S903：在请求的网络的信息所指示的网络支持局域网业务的情况下，NRF网元根据SMF标识与网络的信息的关联关系以及请求的网络的信息获取SMF标识。
其中，SMF标识所标识的SMF网元用于对PDU会话进行管理。
S904：NRF网元向AMF网元发送SMF查询响应消息，SMF查询响应消息携带该SMF标识。
示例性地，SMF查询响应消息可以是Nnrf_NFDiscovery Response消息。
具体实现时，NRF网元可以在接收AMF网元发送的SMF查询请求消息之前，获取上述关联关系。NRF网元可通过如下两种实现方式获取上述关联关系。
实现方式一
NRF网元可获取NEF网元或OAM实体发送的LAN配置参数和SMF标识。
NRF网元接收到LAN配置参数和SMF标识之后，可以保存SMF标识和LAN对应的网络的信息(即LAN配置参数中携带的网络的信息)的关联关系。
实现方式二
NRF网元可通过如下方式获取关联关系：在NRF网元获取关联关系之前，NRF网元接收NEF网元或OAM实体发送的LAN配置参数，LAN配置参数中包含LAN对应的网络的信息。NRF网元为LAN选择进行会话管理的SMF；然后，NRF网元关联存储所述NRF选择的SMF和所述LAN对应的网络的信息，得到所述关联关系。
示例性地，LAN对应的网络的信息包括DNN；或者包括DNN和S-NSSAI。
具体地，NRF网元可先确定对PDU会话进行管理的候选SMF标识；然后，从候选SMF标识中选择SMF标识；最后，建立SMF标识与网络的信息的关联关系。
此外，在一种可能的实现方式中，UDM网元查询NRF网元后也可直接获取到该SMF标识。
在实现方式二中，LAN配置参数中包含LAN对应的网络的信息，但LAN配置参数中并未明确指示用于对PDU会话进行管理的SMF网元的SMF标识。也就是说，NRF网元并不能直接获取上述关联关系，而是需要通过本地查询获取候选SMF标识，再选择其中一个SMF标识并建立该SMF标识与网络的信息的关联关系。
此外，在实施例二中，还提供一种通信系统，如图10所示，该通信系统包括AMF网元和NRF网元。
其中，AMF网元用于执行实施例二中AMF网元的相关操作，NRF网元用于执行实施例二中NRF网元的相关操作。
可选地，图10所示的通信系统还包括AF网元和NEF网元。
在一种实现方式中，AF网元用于向通过NEF网元向NRF网元发送LAN配置参数；NEF网元用于接收来自AF网元的LAN配置参数；向NRF网元发送LAN配置参数。
参见图11，为本申请实施例提供的另一局域网通信方法，该方法可视为实施例二的一种具体实现方式，该方法中以网络的信息为DNN为例。
1、NEF获取AF的5GLAN管理请求。
其中，该5GLAN管理请求中可以包括LAN配置信息与SMF ID，也可以仅包括LAN配置信息。LAN配置信息中包含DNN。5GLAN管理请求中的SMF ID用于指示对LAN对应的成员终端建立的用于局域网通信的PDU会话进行管理的SMF网元。若该5GLAN 管理请求中不包含SMF ID，则NEF可通过查询NRF网元，并从NRF网元返回的SMF list中选择一个SMF ID，作为对LAN对应的成员终端建立的用于局域网通信的PDU会话进行管理的SMF网元。
2、OAM或NEF向NRF配置DNN、SMF ID。
3、NRF在接收到该配置后，可保存DNN和SMF ID的关联关系。
若OAM或NEF向NRF配置DNN、SMF ID，则NRF可直接获取该关联关系。在另一种实现方式中，若OAM或NEF仅向NRF配置DNN，则NRF可通过查询并选择候选SMF ID来建立上述关联关系。
4、UE向AMF网元发送NAS消息。
可选地，UE发送NAS消息后，AMF可与UDM进行交互，以获取UE的签约数据。这个过程为现有技术，此处不再赘述。
其中，NAS消息可携带PDU会话ID、DNN。该NAS消息可以视为PDU会话建立请求。其中，该DNN可以视为终端请求的网络的信息。
5、AMF向NRF发送Nnrf_NFDiscovery请求消息，其中携带DNN。
6、NRF确定DNN；并根据步骤3中保存的关联关系选择SMF ID。
DNN中可以包含第一指示信息。NRF确定DNN的含义是：NRF在接收到该DNN后即可根据第一指示信息判断确定终端请求的网络的信息所指示的网络支持局域网业务，进而确定执行后续步骤为终端发起的、用于建立局域网通信的PDU会话选择SMF网元。
此外，NRF也可通过实施例二中介绍的其他实现方式确定NAS消息中携带的是为5GLAN类型服务预留的DNN，此处不再赘述。
7、NRF向AMF发送Nnrf_NFDiscovery响应消息，其中携带步骤6中选择的SMF ID。
然后，图11中各网元可交互执行现有标准中PDU会话建立流程的步骤3～20，以建立PDU会话。
实施例三
参见图12，为本申请实施例提供的局域网通信方法的流程示意图。
S1201：AMF网元接收终端发送的PDU会话建立请求。
其中，PDU会话建立请求中携带请求的网络的信息。示例性地，该请求的网络的信息可以是DNN，可以是S-NSSAI，也可以是DNN+S-NSSAI。
S1202：AMF网元确定请求的网络的信息所指示的网络是否支持局域网业务。
其中，AMF网元确定请求的网络的信息所指示的网络支持局域网业务，即表示终端此次发起的PDU会话时请求的是LAN类型服务，该PDU会话可以认为是LAN会话，AMF网元则可执行后续步骤，从而为终端请求的LAN类型服务选择一个SMF网元，对终端发起的、用于建立局域网通信的PDU会话进行管理。
具体地，S1202中，AMF网元确定请求的网络的信息所指示的网络是否支持局域网业务的方式可以有多种。具体可以参见前面的描述，这里不再赘述。
S1203：在请求的网络的信息所指示的网络支持局域网业务的情况下，AMF网元向NRF网元发送SMF查询请求消息。
其中，SMF查询请求消息中携带请求的网络的信息以及LAN指示信息，LAN指示信息用于指示请求的网络的信息所指示的网络支持局域网业务。
示例性地，SMF查询请求消息可以是Nnrf_NFDiscovery Request消息。
S1204：NRF网元根据所述LAN指示信息，确定从SMF标识与网络的信息的关联关系中获取与所述请求的网络的信息对应的SMF标识。
也就是说，NRF网元在接收到SMF查询请求消息后，根据SMF查询请求消息中的LAN指示信息确定终端请求的网络的信息所指示的网络支持局域网业务。那么，NRF网元可执行后续步骤，从而为终端请求的PDU会话选择一个SMF网元，以管理该PDU会话。
具体地，若终端为LAN群组内第一个发起PDU会话请求的终端，则NRF网元在获取SMF标识时，可先确定对LAN群组内终端的PDU会话进行管理的候选SMF标识；然后从候选SMF标识中选择SMF标识；同时，NRF网元可建立上述关联关系。
具体地，若终端不是LAN群组内第一个发起PDU会话请求的终端，则NRF网元在获取SMF标识时，可根据之前保存的关联关系以及请求的网络的信息确定SMF标识。
此外，NRF网元也可参照实施例一或实施例二中描述的方式通过与NEF网元或OAM实体进行交互来获取上述关联关系，此处不再赘述。
S1205：NRF网元向AMF网元发送SMF查询响应消息，SMF查询响应消息中携带SMF标识。
示例性地，SMF查询响应消息可以是Nnrf_NFDiscovery Response消息。
此外，在实施例三中，还提供一种通信系统，如图13所示，该通信系统包括AMF网元和NRF网元。
其中，AMF网元用于执行实施例三中AMF网元的相关操作，NRF网元用于执行实施例三中NRF网元的相关操作。
此外，该通信系统还可包括AF网元和NEF网元，二者的功能与实施例二中AF网元、NEF网元的功能相同，此处不再赘述。
参见图14，为本申请实施例提供的另一局域网通信方法，该方法可视为实施例二的一种具体实现方式，该方法中以网络的信息为DNN为例。
1、NEF获取AF的5GLAN管理请求。
其中，该5GLAN管理请求中可以包括LAN配置信息与SMF ID，也可以仅包括LAN配置信息，LAN配置信息中包含DNN。5GLAN管理请求中的SMF ID用于指示对LAN对应的成员终端建立的用于局域网通信的PDU会话进行管理的SMF网元。若该5GLAN管理请求中不包含SMF ID，则NEF可通过查询NRF网元，并从NRF网元返回的SMF list中选择一个SMF ID，作为对LAN对应的成员终端建立的用于局域网通信的PDU会话进行管理的SMF网元。
2、OAM或NEF向NRF发送5GLAN配置参数，其中包括DNN。
可选地，OAM或NEF还可向NRF发送SMF ID。
3、UE向AMF发送NAS消息。
可选地，UE发送NAS消息后，AMF可与UDM进行交互，以获取SMF选择签约数据。这个过程为现有技术，此处不再赘述。
其中，NAS消息可携带PDU会话ID、DNN。该NAS消息可以视为PDU会话建立请求。DNN可以视为终端请求的网络的信息，AMF在接收到DNN后即可根据DNN中的第一指示信息判断该DNN是为LAN类型服务预留的DNN，进而确定执行后续步骤为终端 发起的、用于建立局域网通信的PDU会话选择SMF网元。
此外，AMF也可通过前面描述的其他方式确定NAS消息中携带的是为5GLAN类型服务预留的DNN，此处不再赘述。
4、AMF向NRF发送Nnrf_NFDiscovery请求消息，其中携带DNN和5GLAN指示。
其中，Nnrf_NFDiscovery请求消息中携带的DNN可以视为终端请求的网络的信息。
5、NRF根据DNN和5GLAN指示查询SMF list，从SMF list中选择SMF ID；然后保存DNN与SMF ID的关联关系。
其中，NRF在接收到5GLAN指示后，可确定Nnrf_NFDiscovery请求消息中携带的是为5GLAN类型服务预留的DNN，即确定终端请求的网络的信息所指示的网络支持局域网业务，从而执行后续步骤，为终端发起的PDU会话选择SMF网元。
6、NRF向AMF发送Nnrf_NFDiscovery响应消息，其中携带步骤6中选择的SMF ID。
然后，图14中各网元可交互执行现有标准中PDU会话建立流程的步骤3～20，以建立PDU会话。
7、DNN对应的5GLAN群组中的另一成员UEs发起会话建立请求。
可选地，UEs发起会话建立请求后，AMF可与UDM进行交互，以获取UE的签约数据。
8、AMF向NRF发送Nnrf_NFDiscovery请求消息，其中携带DNN和5GLAN指示。
9、NRF根据DNN以及保存的关联关系选择SMF ID。
其中，NRF在接收到5GLAN指示后，可确定Nnrf_NFDiscovery请求消息中携带的是为5GLAN类型服务预留的DNN，从而执行后续步骤，为终端发起的PDU会话选择SMF网元。
10、NRF向AMF发送Nnrf_NFDiscovery响应消息，其中携带步骤9中选择的SMF ID。
其中，步骤9中选择的SMF ID即为步骤6中选择的SMF ID。
然后，图14中各网元可交互执行现有标准中PDU会话建立流程的步骤3～20，以建立PDU会话。
不难看出，实施例一是通过AMF网元和UDM网元交互来实现本申请方案的，实施例二和实施例三均是通过AMF网元和NRF网元交互来实现本申请方案的，但实施例二与实施例三的不同之处在于，在实施例二中，AMF网元在接收到PDU会话建立请求后并未判断终端请求的网络的信息所指示的网络是否支持局域网业务，而是像现有技术一样向NRF网元发送SMF查询请求消息，然后由NRF网元根据本地配置或者根据请求的网络的信息中的第一指示信息来判断终端请求的网络的信息所指示的网络是否支持局域网业务，进而执行后续流程。在实施例三中，AMF网元在接收到PDU会话建立请求后，先确定终端请求的网络的信息所指示的网络是否支持局域网业务，然后在SMF查询请求消息中携带一个LAN指示信息，NRF网元则可根据LAN指示信息确定终端请求的网络的信息所指示的网络支持局域网业务，进而执行后续流程。
而实施例一和实施例三的不同之处在于，实施例一中，AMF网元判断终端请求的网络的信息所指示的网络支持局域网业务后，直接根据终端的签约数据确定SMF，不需要像现有技术那样去NRF网元请求SMF ID；在实施例三中，AMF网元判断终端请求的网络的信息所指示的网络支持局域网业务后，还是像现有技术一样去NRF网元请求SMF ID，但是在向NRF网元请求SMF ID的时候，相比于现有技术会多携带一个LAN指示信息。
基于同一发明构思，本申请实施例还提供一种局域网通信装置，该装置可用于执行实施例一所示方法中AMF网元的功能。参见图15，该局域网通信装置1500包括接收单元1501和处理单元1502。
接收单元1501，用于接收终端发送的元PDU会话建立请求，PDU会话建立请求中携带请求的网络的信息；
处理单元1502，用于确定请求的网络的信息所指示的网络是否支持局域网业务；在请求的网络的信息所指示的网络支持局域网业务的情况下，根据SMF标识与网络的信息的关联关系以及请求的网络的信息，获取对PDU会话进行管理的SMF标识。
其中，请求的网络的信息包括DNN；或者，DNN和S-NSSAI。
此外，接收单元1501还用于：从UDM网元获取终端的签约数据，其中，终端的签约数据中包括关联关系。
具体地，接收单元1501在从UDM网元获取终端的签约数据时，具体用于：在终端的注册流程中，从UDM网元获取终端的签约数据。
可选地，接收单元1501在UDM网元获取终端的签约数据时，具体用于：在终端的签约文档更新通知流程中，从UDM网元获取所述终端的签约数据。
在一种实现方式中，请求的网络的信息包括其所指示的网络是否支持局域网业务的第一指示信息；处理单元1502在确定请求的网络的信息所指示的网络是否支持局域网业务时，具体用于：根据第一指示信息，确定请求的网络的信息所指示的网络是否支持局域网业务。
在另一种实现方式中，处理单元1502在确定请求的网络的信息所指示的网络是否支持局域网业务时，具体用于：根据本地配置信息，确定请求的网络的信息所指示的网络是否支持局域网业务；或者，根据终端的签约数据，确定请求的网络的信息所指示的网络是否支持局域网业务；或者，PDU会话建立请求还包括请求的网络的信息所指示的网络支持局域网业务的第二指示信息，根据第二指示信息，确定请求的网络的信息所指示的网络支持局域网业务。
基于同一发明构思，本申请实施例还提供一种局域网通信装置，该装置可用于执行实施例一所示方法中UDM网元的功能。参见图16，该局域网通信装置1600包括接收单元1601和处理单元1602。
接收单元1601，用于接收OAM实体或者NEF网元发送的数据更新请求，数据更新请求中包括LAN配置参数，LAN配置参数包含LAN的标识、LAN对应的网络的信息和LAN对应的成员列表；
处理单元1602，用于将SMF标识和LAN对应的网络的信息的关联关系保存至LAN对应的成员列表所指示的终端的签约数据中；其中，SMF标识对应的SMF网元为用于对LAN对应的成员列表所指示的终端的PDU会话进行管理的SMF网元。
其中，LAN对应的网络的信息包括DNN；或者，DNN和S-NSSAI。
此外，数据更新请求中还包括SMF标识。
进一步地，NEF网元通过NRF网元获取SMF标识。
此外，装置1600还包括：发送单元，用于向AMF网元发送签约数据更新通知，签约数据更新通知包括关联关系。
基于同一发明构思，本申请实施例还提供一种局域网通信装置，该装置可用于执行实 施例二所示方法中NRF网元的功能。参见图17，该局域网通信装置1700包括接收单元1701、处理单元1702和发送单元1703。
接收单元1701，用于接收AMF网元发送的SMF查询请求消息，SMF查询请求消息用于请求获取对终端请求建立的PDU会话进行管理的SMF标识，SMF查询请求消息携带请求的网络的信息；
处理单元1702，用于确定请求的网络的信息所指示的网络是否支持局域网业务；在请求的网络的信息所指示的网络支持局域网业务的情况下，根据SMF标识与网络的信息的关联关系以及请求的网络的信息，获取对终端请求建立的PDU会话进行管理的SMF标识；
发送单元1703，用于向AMF网元发送SMF查询响应消息，SMF查询响应消息中携带SMF标识。
其中，LAN对应的网络的信息或者请求的网络的信息可以包括：DNN；或者，DNN和S-NSSAI。
此外，接收单元1701还用于：在接收AMF网元发送的SMF查询请求消息之前，接收NEF网元或OAM实体发送的LAN配置参数，LAN配置参数包含LAN对应的网络的信息；处理单元1702还用于：为LAN选择进行会话管理的SMF；关联存储NRF选择的SMF和LAN对应的网络的信息，得到关联关系。
可选地，接收单元1701还用于：获取NEF网元或OAM实体发送的LAN配置参数和SMF标识，LAN配置参数中包括LAN对应的网络的信息。因而可建立SMF标识与LAN对应的网络的信息的关联关系。
在一种可能的实现方式中，请求的网络的信息包括其所指示的网络是否支持局域网业务的第一指示信息；处理单元1702在确定请求的网络的信息所指示的网络是否支持局域网业务时，具体用于：根据第一指示信息，确定请求的网络的信息所指示的网络是否支持局域网业务。
在另一种可能的实现方式中，处理单元1702在确定请求的网络的信息所指示的网络是否支持局域网业务时，具体用于：
根据本地配置信息，确定请求的网络的信息所指示的网络是否支持局域网业务。
基于同一发明构思，本申请实施例还提供一种局域网通信装置，该装置可用于执行实施例三所示方法中AMF网元的功能。参见图18，该局域网通信装置1800包括接收单元1801、处理单元1802和发送单元1803。
接收单元1801，用于接收终端发送的PDU会话建立请求，PDU会话建立请求中携带请求的网络的信息。
处理单元1802，用于确定请求的网络的信息所指示的网络是否支持局域网业务。
发送单元1803，用于在请求的网络的信息所指示的网络支持局域网业务的情况下，向NRF网元发送SMF查询请求消息，SMF查询请求消息中携带请求的网络的信息以及LAN指示信息，LAN指示信息用于指示请求的网络的信息所指示的网络支持局域网业务。
接收单元1801，还用于接收NRF网元发送的SMF查询响应消息，SMF查询响应消息中包括对终端请求建立的PDU会话进行管理的SMF标识。
其中，请求的网络的信息可以包括DNN；或者，DNN和S-NSSAI。
在一种可能的实现方式中，请求的网络的信息包括其所指示的网络是否支持局域网业务的第一指示信息；处理单元1802在确定请求的网络的信息所指示的网络是否支持局域 网业务时，具体用于：根据第一指示信息，确定请求的网络的信息所指示的网络是否支持局域网业务。
在另一种可能的实现方式中，处理单元1802在确定请求的网络的信息所指示的网络是否支持局域网业务时，具体用于：根据本地配置信息，确定请求的网络的信息所指示的网络是否支持局域网业务；或者，根据终端的签约数据，确定请求的网络的信息所指示的网络是否支持局域网业务；或者，PDU会话建立请求还包括请求的网络的信息所指示的网络支持局域网业务的第二指示信息，根据第二指示信息，确定请求的网络的信息所指示的网络支持局域网业务。
基于同一发明构思，本申请实施例还提供一种局域网通信装置，该装置可用于执行实施例三所示方法中NRFF网元的功能。参见图19，该局域网通信装置1900包括接收单元1901、处理单元1902和发送单元1903。
接收单元1901，用于接收AMF网元发送的SMF查询请求消息，SMF查询请求消息用于请求获取对终端请求建立的PDU会话进行管理的SMF标识，SMF查询请求消息中携带请求的网络的信息以及LAN指示信息，LAN指示信息用于指示请求的网络的信息所指示的网络支持局域网业务；
处理单元1902，用于根据LAN指示信息，确定从SMF标识与网络的信息的关联关系中获取与请求的网络的信息对应的SMF标识；
发送单元1902，用于向AMF网元发送SMF查询响应消息，SMF查询响应消息中携带获取的SMF标识。
可选地，接收单元1901还用于：在接收AMF网元发送的SMF查询请求消息之前，接收NEF网元或OAM实体发送的LAN配置参数，LAN配置参数包含LAN对应的网络的信息；处理单元1902还用于：为LAN选择进行会话管理的SMF；关联存储NRF选择的SMF和LAN对应的网络的信息，得到关联关系。
本申请实施例中对单元的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，另外，在本申请各个实施例中的各功能单元可以集成在一个处理器中，也可以是单独物理存在，也可以两个或两个以上单元集成在一个模块中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。
该集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台终端设备(可以是个人计算机，手机，或者网络设备等)或处理器(processor)执行本申请各个实施例该方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
在本申请的各实施例中，AMF网元、UDM网元、NRF网元均可以采用集成的方式划分各个功能模块的形式来呈现。这里的“模块”可以指特定ASIC，电路，执行一个或多个软件或固件程序的处理器和存储器，集成逻辑电路，和/或其他可以提供上述功能的器件。
在一个简单的实施例中，本领域的技术人员可以想到AMF网元、UDM网元、NRF网元均可采用图20所示的形式。
如图20所示的局域网通信装置2000，包括至少一个处理器2001、存储器2002，可选的，还可以包括通信接口2003。
存储器2002可以是易失性存储器，例如随机存取存储器；存储器也可以是非易失性存储器，例如只读存储器，快闪存储器，硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)、或者存储器2002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。存储器2002可以是上述存储器的组合。
本申请实施例中不限定上述处理器2001以及存储器2002之间的具体连接介质。本申请实施例在图中以存储器2002和处理器2001之间通过总线2004连接，总线2004在图中以粗线表示，其它部件之间的连接方式，仅是进行示意性说明，并不引以为限。该总线2004可以分为地址总线、数据总线、控制总线等。为便于表示，图20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。
处理器2001可以具有数据收发功能，能够与其他设备进行通信，在如图20装置中，也可以设置独立的数据收发模块，例如通信接口2003，用于收发数据；处理器2001在与其他设备进行通信时，可以通过通信接口2003进行数据传输。
当AMF网元采用图20所示的形式时，图20中的处理器2001可以通过调用存储器2002中存储的计算机执行指令，使得所述AMF网元可以执行上述任一方法实施例中AMF网元执行的方法。
具体的，图15中的发送单元、接收单元和处理单元的功能/实现过程均可以通过图20中的处理器2001调用存储器2002中存储的计算机执行指令来实现。或者，图15中的处理单元的功能/实现过程可以通过图20中的处理器2001调用存储器2002中存储的计算机执行指令来实现，图15中的发送单元和接收单元的功能/实现过程可以通过图20中的通信接口2003来实现。
具体的，图18中的发送单元、接收单元和处理单元的功能/实现过程均可以通过图20中的处理器2001调用存储器2002中存储的计算机执行指令来实现。或者，图18中的处理单元的功能/实现过程可以通过图20中的处理器2001调用存储器2002中存储的计算机执行指令来实现，图18中的发送单元和接收单元的功能/实现过程可以通过图20中的通信接口2003来实现。
当UDM网元采用图20所示的形式时，图20中的处理器2001可以通过调用存储器2002中存储的计算机执行指令，使得所述UDM网元可以执行上述任一方法实施例中中UDM网元执行的方法。
具体的，图16中的发送单元、接收单元和处理单元的功能/实现过程均可以通过图20中的处理器2001调用存储器2002中存储的计算机执行指令来实现。或者，图16中的处理单元的功能/实现过程可以通过图20中的处理器2001调用存储器2002中存储的计算机执行指令来实现，图16中的发送单元和接收单元的功能/实现过程可以通过图20中的通信接口2003来实现。
当NRF网元采用图20所示的形式时，图20中的处理器2001可以通过调用存储器2002中存储的计算机执行指令，使得所述NRF网元可以执行上述任一方法实施例中的NRF网元执行的方法。
具体的，图17中的接收单元、发送单元和处理单元的功能/实现过程均可以通过图20 中的处理器2001调用存储器2002中存储的计算机执行指令来实现。或者，图17中的处理单元的功能/实现过程可以通过图20中的处理器2001调用存储器2002中存储的计算机执行指令来实现，图17中的接收单元、发送单元的功能/实现过程可以通过图20中的通信接口2003来实现。
具体的，图19中的接收单元、发送单元和处理单元的功能/实现过程均可以通过图20中的处理器2001调用存储器2002中存储的计算机执行指令来实现。或者，图19中的处理单元的功能/实现过程可以通过图20中的处理器2001调用存储器2002中存储的计算机执行指令来实现，图19中的接收单元、发送单元的功能/实现过程可以通过图20中的通信接口2003来实现。
本申请是参照根据本申请的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
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精神和范围。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。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。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、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(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能够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，DVD)、或者半导体介质(例如固态硬盘solid state disk(SSD))等。

Claims (43)

  1. 一种局域网通信方法，其特征在于，包括：
    接入和移动性管理功能AMF网元接收终端发送的协议数据单元PDU会话建立请求，所述PDU会话建立请求中携带请求的网络的信息；
    所述AMF网元确定所述请求的网络的信息所指示的网络是否支持局域网业务；
    在所述请求的网络的信息所指示的网络支持局域网业务的情况下，所述AMF网元根据会话管理功能SMF标识与网络的信息的关联关系以及所述请求的网络的信息，获取对所述PDU会话进行管理的SMF标识。
  2. 如权利要求1所述的方法，其特征在于，所述方法还包括：
    所述AMF网元从统一数据管理UDM网元获取所述终端的签约数据，其中，所述终端的签约数据中包括所述关联关系。
  3. 如权利要求2所述的方法，其特征在于，所述AMF网元从统一数据管理UDM网元获取所述终端的签约数据，具体为：
    所述AMF网元在所述终端的注册流程中，从统一数据管理UDM网元获取所述终端的签约数据。
  4. 如权利要求2所述的方法，其特征在于，所述AMF网元从统一数据管理UDM网元获取所述终端的签约数据，具体为：
    所述UDM网元接收来自网络开放功能NEF网元或者操作维护管理OAM实体的数据更新请求，所述数据更新请求中包括LAN配置参数和SMF标识，所述LAN配置参数中包含所述LAN的标识、所述LAN对应的网络的信息和所述LAN对应的成员列表；
    所述UDM网元将所述SMF标识和所述LAN对应的网络的信息的关联关系保存到所述终端的签约数据中；
    所述UDM网元向所述AMF网元发送所述关联关系；
    所述AMF网元接收所述关联关系。
  5. 如权利要求1-4任一所述的方法，其特征在于，所述请求的网络的信息包括其所指示的网络是否支持局域网业务的第一指示信息；所述AMF网元确定所述请求的网络的信息所指示的网络是否支持局域网业务，包括：
    所述AMF网元根据所述第一指示信息，确定所述请求的网络的信息所指示的网络是否支持局域网业务。
  6. 如权利要求1-4任一所述的方法，其特征在于，所述AMF网元确定所述请求的网络的信息所指示的网络是否支持局域网业务，包括：
    所述AMF网元根据本地配置信息，确定所述请求的网络的信息所指示的网络是否支持局域网业务；或者，
    所述AMF网元根据所述终端的签约数据，确定所述请求的网络的信息所指示的网络是否支持局域网业务；或者，
    所述PDU会话建立请求还包括所述请求的网络的信息所指示的网络支持局域网业务的第二指示信息，所述AMF网元根据所述第二指示信息，确定所述请求的网络的信息所指示的网络支持局域网业务。
  7. 如权利要求1-6任一所述的方法，其特征在于，所述所述请求的网络的信息包括数 据网络名称DNN；或者，
    DNN和单个网络切片选择辅助信息S-NSSAI。
  8. 一种局域网通信方法，其特征在于，包括：
    UDM网元接收操作维护管理OAM实体或者网络开放功能NEF网元发送的数据更新请求，所述数据更新请求中包括LAN配置参数，所述LAN配置参数包含LAN的标识、所述LAN对应的网络的信息和所述LAN对应的成员列表；
    所述UDM网元将SMF标识和所述LAN对应的网络的信息的关联关系保存至所述LAN对应的成员列表所指示的终端的签约数据中；其中，所述SMF标识对应的SMF网元为用于对所述LAN对应的成员列表所指示的终端的PDU会话进行管理的SMF网元。
  9. 如权利要求8所述的方法，其特征在于，所述数据更新请求中还包括所述SMF标识。
  10. 如权利要求9所述的方法，其特征在于，所述方法还包括：
    所述NEF网元通过网络功能存储库功能NRF网元，获取所述SMF标识。
  11. 如权利要求8-10任一所述的方法，其特征在于，所述方法还包括：
    所述UDM网元向所述AMF网元发送签约数据更新通知，所述签约数据更新通知包括所述关联关系。
  12. 如权利要求8-11任一所述的方法，其特征在于，所述LAN对应的网络的信息包括DNN；或者，
    DNN和S-NSSAI。
  13. 一种局域网通信方法，其特征在于，包括：
    NRF网元接收AMF网元发送的SMF查询请求消息，所述SMF查询请求消息用于请求获取对终端请求建立的PDU会话进行管理的SMF标识，所述SMF查询请求消息携带请求的网络的信息；
    所述NRF网元确定所述请求的网络的信息所指示的网络是否支持局域网业务；
    所述NRF网元在所述请求的网络的信息所指示的网络支持局域网业务的情况下，根据SMF标识与网络的信息的关联关系以及所述请求的网络的信息，获取对终端请求建立的PDU会话进行管理的SMF标识；
    所述NRF网元向所述AMF网元发送SMF查询响应消息，所述SMF查询响应消息中携带获取的SMF标识。
  14. 一种局域网通信方法，其特征在于，包括：
    AMF网元接收终端发送的PDU会话建立请求，所述PDU会话建立请求中携带请求的网络的信息；
    所述AMF网元确定所述请求的网络的信息所指示的网络是否支持局域网业务；
    所述AMF网元在所述请求的网络的信息所指示的网络支持局域网业务的情况下，向NRF网元发送SMF查询请求消息，所述SMF查询请求消息中携带所述请求的网络的信息以及LAN指示信息，所述LAN指示信息用于指示请求的网络的信息所指示的网络支持局域网业务；
    所述AMF网元接收所述NRF网元发送的SMF查询响应消息，所述SMF查询响应消息中包括对所述终端请求建立的PDU会话进行管理的SMF标识。
  15. 一种局域网通信方法，其特征在于，包括：
    NRF网元接收AMF网元发送的SMF查询请求消息，所述SMF查询请求消息用于请求获取对终端请求建立的PDU会话进行管理的SMF标识，所述SMF查询请求消息中携带请求的网络的信息以及LAN指示信息，所述LAN指示信息用于指示所述请求的网络的信息所指示的网络支持局域网业务；
    所述NRF网元根据LAN指示信息，确定从SMF标识与网络的信息的关联关系中获取与所述请求的网络的信息对应的SMF标识；
    所述NRF网元向所述AMF网元发送SMF查询响应消息，所述SMF查询响应消息中携带获取的SMF标识。
  16. 一种局域网通信装置，其特征在于，包括：
    接收单元，用于接收终端发送的协议数据单元PDU会话建立请求，所述PDU会话建立请求中携带请求的网络的信息；
    处理单元，用于确定所述请求的网络的信息所指示的网络是否支持局域网业务；在所述请求的网络的信息所指示的网络支持局域网业务的情况下，根据SMF标识与网络的信息的关联关系以及所述请求的网络的信息，获取对所述PDU会话进行管理的SMF标识。
  17. 如权利要求16所述的装置，其特征在于，所述接收单元还用于：
    从UDM网元获取所述终端的签约数据，其中，所述终端的签约数据中包括所述关联关系。
  18. 如权利要求17所述的装置，其特征在于，所述接收单元在从统UDM网元获取所述终端的签约数据时，具体用于：
    在所述终端的注册流程中，从所述UDM网元获取所述终端的签约数据。
  19. 如权利要求17所述的装置，其特征在于，所述接收单元在从UDM网元获取所述终端的签约数据时，具体用于：
    在所述终端的签约文档更新通知流程中，从所述UDM网元获取所述终端的签约数据。
  20. 如权利要求16-19任一所述的装置，其特征在于，所述请求的网络的信息包括其所指示的网络是否支持局域网业务的第一指示信息；所述处理单元在确定所述请求的网络的信息所指示的网络是否支持局域网业务时，具体用于：
    根据所述第一指示信息，确定所述请求的网络的信息所指示的网络是否支持局域网业务。
  21. 如权利要求16-19任一所述的装置，其特征在于，所述处理单元在确定所述请求的网络的信息所指示的网络是否支持局域网业务时，具体用于：
    根据本地配置信息，确定所述请求的网络的信息所指示的网络是否支持局域网业务；或者，
    根据所述终端的签约数据，确定所述请求的网络的信息所指示的网络是否支持局域网业务；或者，
    所述PDU会话建立请求还包括所述请求的网络的信息所指示的网络支持局域网业务的第二指示信息，根据所述第二指示信息，确定所述请求的网络的信息所指示的网络支持局域网业务。
  22. 如权利要求16-21任一所述的装置，其特征在于，所述所述请求的网络的信息包括数据网络名称DNN；或者，DNN和S-NSSAI。
  23. 一种局域网通信装置，其特征在于，包括：
    接收单元，用于接收OAM实体或者NEF网元发送的数据更新请求，所述数据更新请求中包括LAN配置参数，所述LAN配置参数包含LAN的标识、所述LAN对应的网络的信息和所述LAN对应的成员列表；
    处理单元，用于将SMF标识和所述LAN对应的网络的信息的关联关系保存至所述LAN对应的成员列表所指示的终端的签约数据中；其中，所述SMF标识对应的SMF网元为用于对所述LAN对应的成员列表所指示的终端的PDU会话进行管理的SMF网元。
  24. 如权利要求23所述的装置，其特征在于，所述数据更新请求中还包括所述SMF标识。
  25. 如权利要求24所述的装置，其特征在于，所述NEF网元通过NRF网元获取所述SMF标识。
  26. 如权利要求23-25任一所述的装置，其特征在于，所述装置还包括：
    发送模块，用于向AMF网元发送签约数据更新通知，所述签约数据更新通知包括所述关联关系。
  27. 如权利要求23-26任一所述的装置，其特征在于，所述LAN对应的网络的信息包括DNN；或者，DNN和S-NSSAI。
  28. 一种局域网通信系统，其特征在于，包括AMF网元和UDM网元；
    所述UDM网元，用于
    接收OAM实体或者NEF网元发送的数据更新请求，所述数据更新请求中包括LAN配置参数，所述LAN配置参数包含LAN的标识、所述LAN对应的网络的信息和所述LAN对应的成员列表；
    将SMF标识和所述LAN对应的网络的信息的关联关系保存至所述LAN对应的成员列表所指示的终端的签约数据中；其中，所述SMF标识对应的SMF网元为用于对所述LAN对应的成员列表所指示的终端的PDU会话进行管理的SMF网元；
    向所述AMF网元发送所述关联关系；
    所述AMF网元，用于
    接收来自所述UDM网元的所述关联关系；
    接收第一终端发送的PDU会话建立请求，所述PDU会话建立请求中携带请求的网络的信息，所述第一终端为所述LAN对应的成员列表所指示的终端中的任意一个终端；
    确定所述请求的网络的信息所指示的网络是否支持局域网业务；
    在所述请求的网络的信息所指示的网络支持局域网业务的情况下，根据所述关联关系以及所述请求的网络的信息，获取对所述第一终端请求建立的PDU会话进行管理的SMF标识。
  29. 如权利要求28所述的系统，其特征在于，还包括AF网元和所述NEF网元：
    所述AF网元，用于向所述NEF网元发送LAN管理请求，所述LAN管理请求中携带所述LAN配置参数；
    所述NEF网元，用于接收所述LAN管理请求；向所述UDM网元发送所述数据更新 请求。
  30. 如权利要求28或者29所述的系统，其特征在于，所述数据更新请求中还包括对所述LAN对应的成员列表所指示的终端的PDU会话进行管理的SMF标识。
  31. 如权利要求30所述的系统，其特征在于，所述NEF网元还用于：
    通过NRF网元，获取对所述LAN对应的成员列表所指示的终端的PDU会话进行管理的SMF标识。
  32. 如权利要求28-31任一所述的系统，其特征在于，所述请求的网络的信息包括其所指示的网络是否支持局域网业务的第一指示信息；所述AMF网元在确定所述请求的网络的信息所指示的网络是否支持局域网业务时，具体用于：
    根据所述第一指示信息，确定所述请求的网络的信息所指示的网络是否支持局域网业务。
  33. 如权利要求28-31任一所述的系统，其特征在于，所述AMF网元在确定所述请求的网络的信息所指示的网络是否支持局域网业务时，具体用于：
    根据本地配置信息，确定所述请求的网络的信息所指示的网络是否支持局域网业务；或者，
    根据所述终端的签约数据，确定所述请求的网络的信息所指示的网络是否支持局域网业务；或者，
    所述PDU会话建立请求还包括所述请求的网络的信息所指示的网络支持局域网业务的第二指示信息；根据所述第二指示信息，确定所述请求的网络的信息所指示的网络支持局域网业务。
  34. 如权利要求28-33任一所述的系统，其特征在于，所述LAN对应的网络的信息或者所述请求的网络的信息包括DNN；或者，DNN和S-NSSAI。
  35. 一种局域网通信系统，其特征在于，包括NRF网元和AMF网元；
    所述AMF网元，用于接收终端发送的PDU会话建立请求，所述PDU会话建立请求中携带请求的网络的信息；向所述NRF网元发送SMF查询请求消息，所述SMF查询请求消息用于请求获取对所述终端请求建立的PDU会话进行管理的SMF标识，所述SMF查询请求消息携带请求的网络的信息；
    所述NRF网元，用于接收所述AMF网元发送的所述SMF查询请求消息；确定所述请求的网络的信息所指示的网络是否支持局域网业务；在所述请求的网络的信息所指示的网络支持局域网业务的情况下，根据SMF标识与网络的信息的关联关系以及所述请求的网络的信息，获取对所述终端请求建立的PDU会话进行管理的SMF标识。
  36. 一种局域网通信系统，其特征在于，包括NRF网元和AMF网元；
    所述AMF网元，用于接收终端发送的PDU会话建立请求，所述PDU会话建立请求中携带请求的网络的信息；确定所述请求的网络的信息所指示的网络是否支持局域网业务；在所述请求的网络的信息所指示的网络支持局域网业务的情况下，向所述NRF网元发送SMF查询请求消息，所述SMF查询请求消息用于请求中携带所述请求的网络的信息以及LAN指示信息，所述LAN指示信息用于指示所述请求的网络的信息所指示的网络支持局域网业务；
    所述NRF网元，用于接收所述AMF网元发送的所述SMF查询请求消息；根据所述LAN指示信息，确定从SMF标识与网络的信息的关联关系中获取与所述请求的网络的信 息对应的SMF标识；向所述AMF网元发送SMF查询响应消息，所述SMF查询响应消息中携带获取的SMF标识。
  37. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行如权利要求1至7中任一项所述的方法。
  38. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行如权利要求8至12中任一项所述的方法。
  39. 一种计算机芯片，其特征在于，所述芯片与存储器相连，所述芯片用于读取并执行所述存储器中存储的软件程序，执行如权利要求1到12任一项所述的方法。
  40. 一种包含指令的计算机程序产品，其特征在于，当其在计算机上运行时，使得计算机执行如权利要求1到12任一项所述的方法。
  41. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行如权利要求13所述的方法。
  42. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行如权利要求14所述的方法。
  43. 一种计算机芯片，其特征在于，所述芯片与存储器相连，所述芯片用于读取并执行所述存储器中存储的软件程序，执行如权利要求15所述的方法。
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