CN111436160B

CN111436160B - Local area network communication method, device and system

Info

Publication number: CN111436160B
Application number: CN201910036573.2A
Authority: CN
Inventors: 朱强华; 姚琦; 朱奋勤; 吴问付
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-01-15
Filing date: 2019-01-15
Publication date: 2022-04-29
Anticipated expiration: 2039-01-15
Also published as: CN111436160A; WO2020147760A1

Abstract

The embodiment of the application discloses a local area network communication method, a device and a system, which are used for selecting an SMF network element for a terminal when the terminal initiates a PDU session. The method comprises the following steps: an AMF network element receives a PDU session establishment request sent by a terminal, wherein the PDU session establishment request carries information of a requested network; the AMF network element determines whether the network indicated by the requested network information supports local area network service; and under the condition that the network indicated by the information of the requested network supports the local area network service, the AMF network element acquires the SMF identifier for managing the PDU session according to the association relation between the SMF identifier and the information of the network and the information of the requested network.

Description

Local area network communication method, device and system

Technical Field

The present application relates to the field of communications technologies, and in particular, to a local area network communication method, apparatus, and system.

Background

A Local Area Network (LAN) service is a service provided by a 5G network, and can provide an Internet Protocol (IP) type or a non-IP type private communication for terminals (UEs) belonging to the same LAN group. UEs may join a LAN group depending on traffic needs or proprietary attributes, and UEs belonging to the LAN group may communicate using 5GLAN type services.

A 5GLAN type service may provide point-to-point data transmission between a UE and the UE, and an association needs to be established between Protocol Data Unit (PDU) sessions of the two UEs before data transmission can be performed. Sessions in which all UEs in the same LAN group connect to the 5GLAN are under the management control of a Session Management Function (SMF) network element. When the UE initiates a PDU session, only if the same SMF network element is selected for all UEs in the LAN group, the data exchange between the UEs in the LAN group can be realized under the management of the SMF network element.

Therefore, when the UE initiates a 5GLAN session, how to select an SMF network element for the UE is an urgent problem to be solved.

Disclosure of Invention

The embodiment of the application provides a local area network communication method, device and system, which are used for selecting an SMF network element for UE when the UE initiates a PDU session.

In a first aspect, an embodiment of the present application provides a local area network communication method, including 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, wherein the PDU session establishment request carries information of a requested network; the AMF network element determines whether the network indicated by the requested network information supports local area network service; and under the condition that the network indicated by the requested network information supports the local area network service, the AMF network element acquires the SMF identifier for managing the PDU session according to the incidence relation between the session management function SMF identifier and the network information and the requested network information.

Wherein the information of the requested network may include a data network name DNN; alternatively, the DNN and the single network slice selection assistance information S-NSSAI.

By adopting the above scheme, after determining whether the network indicated by the requested network information supports the local area network service, the AMF network element may obtain the SMF identifier according to the association relationship, and the SMF network element identified by the SMF identifier may be used to manage the PDU session initiated by the terminal in the LAN group and used to establish the local area network communication. Since the association relationship is the association relationship between the SMF identifier and the network information, 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 association relationship, thereby selecting the same SMF identifier for each terminal in the LAN group. That is to say, with the above-mentioned scheme, when a terminal initiates a PDU session, the same SMF network element may be selected for all terminals in the same LAN group for session management.

In addition, in the method, the AMF network element may obtain subscription data of the terminal from the UDM network element, where the subscription data of the terminal includes an association relationship.

In a possible implementation manner, the AMF network element obtains subscription data of the terminal from the UDM network element, specifically: and the AMF network element acquires the subscription data of the terminal from the unified data management UDM network element in the registration process of the terminal.

By adopting the scheme, the association relation can be acquired in the registration process of the terminal.

In another possible implementation manner, the AMF network element obtains subscription data of the terminal from the UDM network element, which specifically includes: the method comprises the steps that a UDM network element receives a data updating request from an application function NEF network element or an operation maintenance management OAM entity, the data updating request comprises a LAN configuration parameter and an SMF identifier, and the LAN configuration parameter comprises the identifier of the LAN, information of a network corresponding to the LAN and a member list corresponding to the LAN; the UDM network element stores the association relation between the SMF identification and the information of the network corresponding to the LAN into the signing data of the terminal; the UDM network element sends the association relation to the AMF network element; and the AMF network element receives the association relation.

By adopting the scheme, if the association relation is not configured in the subscription data of the terminal or the association relation is updated during LAN configuration, the association relation can be stored in the subscription data of the terminal through the scheme, and then the association relation is sent to the AMF network element through the process of sending the subscription data by the UDM network element.

In the local area network communication method provided in the first aspect, the AMF network element may determine whether the network indicated by the requested network information supports the local area network service by: the information of the requested network comprises first indication information of whether the network indicated by the information supports local area network service; and the AMF network element determines whether the network indicated by the information of the requested network supports the local area network service or not according to the first indication information.

By adopting the scheme, the AMF network element directly determines whether the network indicated by the information of the requested network supports the local area network service according to the information of the requested network.

In the local area network communication method provided in the first aspect, the AMF network element may determine whether the network indicated by the requested network information supports the local area network service by: the AMF network element determines whether the network indicated by the requested network information supports local area network service according to the local configuration information; or, the AMF network element determines whether the network indicated by the requested network information supports the local area network service according to the subscription data of the terminal; or, the PDU session establishment request further includes second indication information that the network indicated by the information of the requested network supports the local area network service, and the AMF network element determines that the network indicated by the information of the requested network supports the local area network service according to the second indication information.

By adopting the scheme, the AMF network element determines whether the network indicated by the information of the requested network supports the local area network service according to other information except the information of the requested network.

In a second aspect, an embodiment of the present application provides a local area network communication method, including: the method comprises the steps that a UDM network element receives a data updating request sent by an operation, maintenance and management (OAM) entity or a network open function (NEF) network element, wherein the data updating request comprises a LAN configuration parameter, and the LAN configuration parameter comprises an identifier of a LAN, information of a network corresponding to the LAN and a member list corresponding to the LAN; the UDM network element stores the association relation between the SMF identification and the information of the network corresponding to the LAN into the subscription data of the terminal indicated by the member list corresponding to the LAN; the SMF network element corresponding to the SMF identifier is used for managing the PDU session of the terminal indicated by the member list corresponding to the LAN.

Further, the UDM network element may also send a subscription data update notification to the AMF network element, where the subscription data update notification includes an association relationship.

The information of the network corresponding to the LAN may include a data network name DNN; alternatively, the DNN and the single network slice selection assistance information S-NSSAI.

By adopting the scheme, the UDM network element can configure the association relation into the subscription data of the terminal through the data updating request, the AMF network element can obtain the SMF identifier according to the association relation, and the SMF network element identified by the SMF identifier can be used for managing the PDU session initiated by the terminal in the LAN group and used for establishing the local area network communication. Since the association relationship is the association relationship between the SMF identifier and the network information, 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 association relationship, thereby selecting the same SMF identifier for each terminal in the LAN group. That is to say, with the above-mentioned scheme, when a terminal initiates a PDU session, the same SMF network element may be selected for all terminals in the same LAN group for session management.

In addition, the data updating request also comprises an SMF identification.

The SMF identifier may be an SMF identifier obtained by the NEF network element through the network function repository function NRF network element.

If the data update request includes the SMF identifier, the UDM network element may directly determine the association relationship between the SMF identifier and the information of the network corresponding to the LAN. If the data updating request does not include the SMF identifier, the UDM network element can acquire the SMF identifier by inquiring the NRF network element and then establish the association relationship.

In a third aspect, an embodiment of the present application provides a local area network communication method, including the following steps: the method comprises the steps that an NRF network element receives an SMF query request message sent by an AMF network element, wherein the SMF query request message is used for requesting to acquire an SMF identifier for managing a PDU session requested to be established by a terminal, and the SMF query request message carries information of a requested network; the NRF network element determines whether the network indicated by the requested network information supports local area network services; under the condition that the network indicated by the information of the requested network supports the local area network service, the NRF network element acquires an SMF identifier for managing the PDU session requested to be established by the terminal according to the association relation between the SMF identifier and the information of the network and the information of the requested network; and the NRF network element sends an SMF query response message to the AMF network element, wherein 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 includes: DNN; alternatively, DNN and S-NSSAI.

By adopting the above scheme, after the NRF network element determines whether the network indicated by the requested network information supports the local area network service, the SMF identifier can be obtained according to the association relationship, and the SMF network element identified by the SMF identifier can be used for managing a PDU session initiated by a terminal in the LAN group and used for establishing local area network communication. Since the association relationship is the association relationship between the SMF identifier and the network information, 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 association relationship, thereby selecting the same SMF identifier for each terminal in the LAN group. That is to say, with the above-mentioned scheme, when a terminal initiates a PDU session, the same SMF network element may be selected for all terminals in the same LAN group for session management.

In a possible implementation manner, before the NRF network element receives the SMF query request message sent by the AMF network element, the method further includes: receiving LAN configuration parameters sent by a NEF network element or an OAM entity, wherein the LAN configuration parameters comprise information of a network corresponding to the LAN; selecting an SMF for session management for the LAN; and associating and storing the information of the SMF selected by the NRF and the network corresponding to the LAN to obtain an association relation.

By adopting the scheme, a scheme for obtaining the association relation by the NRF network element is provided.

In a possible implementation manner, an NRF network element obtains a LAN configuration parameter and an SMF identifier sent by an NEF network element or an OAM entity, where the LAN configuration parameter includes information of a network corresponding to a LAN; the NRF may thus establish an association of the SMF with information identifying the network to which the LAN corresponds.

By adopting the scheme, another scheme for the NRF network element to acquire the association relation is provided.

In addition, the NRF network element determines whether the network indicated by the requested network information supports the local area network service, which may be specifically implemented as follows: the information of the requested network comprises first indication information of whether the network indicated by the information supports local area network service; and the NRF network element determines whether the network indicated by the information of the requested network supports the local area network service or not according to the first indication information.

By adopting the scheme, the NRF network element directly determines whether the network indicated by the information of the requested network supports the local area network service according to the information of the requested network.

In addition, the NRF network element determines whether the network indicated by the requested network information supports the local area network service, which may be specifically implemented as follows: and the NRF network element determines whether the network indicated by the information of the requested network supports the local area network service or not according to the local configuration information.

By adopting the scheme, the NRF network element determines whether the network indicated by the information of the requested network supports the local area network service according to other information except the information of the requested network.

In a fourth aspect, an embodiment of the present application provides a local area network communication method, including the following steps: an AMF network element receives a PDU session establishment request sent by a terminal, wherein the PDU session establishment request carries information of a requested network; the AMF network element determines whether the network indicated by the requested network information supports local area network service; under the condition that the network indicated by the requested network information supports the local area network service, the AMF network element sends an SMF query request message to the NRF network element, wherein the SMF query request message carries the requested network information and LAN indication information, and the LAN indication information is used for indicating that the network indicated by the requested network information supports the local area network service; and the AMF network element receives an SMF query response message sent by the NRF network element, wherein the SMF query response message comprises an SMF identifier for managing the PDU session requested to be established by the terminal.

Wherein the information of the requested network comprises a DNN; alternatively, DNN and S-NSSAI.

By adopting the above scheme, after determining that the network indicated by the requested network information supports local area network services, the AMF network element may send LAN indication information to the NRF network element. After receiving the LAN indication information, the NRF network element determines that the network indicated by the information of the requested network supports the local area network service, and then may obtain the SMF identifier according to the association relationship, where the SMF network element identified by the SMF identifier may be used to manage a PDU session initiated by a terminal in the LAN group and used to establish local area network communication. Since the association relationship is the association relationship between the SMF identifier and the network information, 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 association relationship, thereby selecting the same SMF identifier for each terminal in the LAN group. That is to say, with the above-mentioned scheme, when a terminal initiates a PDU session, the same SMF network element may be selected for all terminals in the same LAN group for session management.

In addition, the AMF network element determines whether the network indicated by the requested network information supports the local area network service, which may specifically be implemented as follows: the information of the requested network comprises first indication information of whether the network indicated by the information supports local area network service; and the AMF network element determines whether the network indicated by the information of the requested network supports the local area network service or not according to the first indication information.

In addition, the AMF network element determines whether the network indicated by the requested network information supports the local area network service, which may also be implemented as follows: the AMF network element determines whether the network indicated by the requested network information supports local area network service according to the local configuration information; or, the AMF network element determines whether the network indicated by the requested network information supports the local area network service according to the subscription data of the terminal; or, the PDU session establishment request further includes second indication information that the network indicated by the information of the requested network supports the local area network service, and the AMF network element determines that the network indicated by the information of the requested network supports the local area network service according to the second indication information.

In a fifth aspect, an embodiment of the present application provides a local area network communication method, including the following steps: the method comprises the steps that an NRF network element receives an SMF query request message sent by an AMF network element, the SMF query request message is used for requesting to acquire an SMF identifier for managing a PDU session requested to be established by a terminal, the SMF query request message carries requested network information and LAN indication information, and the LAN indication information is used for indicating that the network indicated by the requested network information supports local area network services; the NRF network element determines to acquire an 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; and the NRF network element sends an SMF query response message to the AMF network element, wherein the SMF query response message carries the acquired SMF identifier.

By adopting the above scheme, after receiving the LAN indication information, the NRF network element determines whether the network indicated by the requested network information supports the local area network service, and then may obtain the SMF identifier according to the association relationship, where the SMF network element identified by the SMF identifier may be used to manage the PDU session initiated by the terminal in the LAN group and used to establish the local area network communication. Since the association relationship is the association relationship between the SMF identifier and the network information, 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 association relationship, thereby selecting the same SMF identifier for each terminal in the LAN group. That is to say, with the above-mentioned scheme, when a terminal initiates a PDU session, the same SMF network element may be selected for all terminals in the same LAN group for session management.

In one possible design, 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 LAN configuration parameters sent by the NEF network element or the OAM entity, wherein the LAN configuration parameters comprise information of a network corresponding to the LAN; selecting an SMF for session management for the LAN; and associating and storing the information of the SMF selected by the NRF and the network corresponding to the LAN to obtain an association relation.

In addition, the 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 is not described herein again.

In a sixth aspect, an embodiment of the present application further provides a local area network communication device, where the local area network communication device is applied to an AMF network element, and for beneficial effects, reference may be made to the description of the first aspect and details are not repeated here. The apparatus has the functionality to implement the actions in the method instance of the first aspect described above. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions. In a possible design, the structure of the apparatus includes a receiving unit, a processing unit, and a sending unit, and these units may perform corresponding functions in the method example of the first aspect, for which specific reference is made to the detailed description in the method example, and details are not repeated here.

In a seventh aspect, an embodiment of the present application further provides a local area network communication device, where the local area network communication device is applied to a UDM network element, and for beneficial effects, reference may be made to description of the second aspect and details are not repeated here. The apparatus has the functionality to implement the actions in the method instance of the second aspect described above. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions. In a possible design, the structure of the apparatus includes a receiving unit and a sending unit, and may further include a processing unit, where these units may perform corresponding functions in the method example of the second aspect, for specific reference, detailed description in the method example is given, and details are not repeated here.

In an eighth aspect, an embodiment of the present application further provides a local area network communication apparatus, where the local area network communication apparatus is applied to an NRF network element, and for beneficial effects, reference may be made to the description of the third aspect and details are not repeated here. The apparatus has the function of implementing the actions in the method instance of the third aspect described above. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions. In a possible design, the structure of the apparatus includes a receiving unit, a processing unit, and a sending unit, and these units may perform corresponding functions in the method example of the third aspect, for specific reference, detailed description in the method example is given, and details are not repeated here.

In a ninth aspect, an embodiment of the present application further provides a local area network communication device, where the local area network communication device is applied to an AMF network element, and for beneficial effects, reference may be made to the description of the fourth aspect and details are not repeated here. The apparatus has the functionality to implement the actions in the method instance of the fourth aspect described above. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions. In a possible design, the structure of the apparatus includes a receiving unit, a processing unit, and a sending unit, and these units may perform corresponding functions in the method example of the fourth aspect, for specific reference, detailed description in the method example is given, and details are not repeated here.

In a tenth aspect, an embodiment of the present application further provides a local area network communication apparatus, where the local area network communication apparatus is applied to an NRF network element, and for beneficial effects, reference may be made to the description of the fifth aspect and details are not repeated here. The apparatus has the function of implementing the actions in the method example of the fifth aspect described above. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions. In a possible design, the structure of the apparatus includes a receiving unit, a processing unit, and a sending unit, and these units may perform corresponding functions in the method example of the fifth aspect, for specific reference, detailed description in the method example is given, and details are not repeated here.

In an eleventh aspect, an embodiment of the present application further provides a local area network communication device, where the local area network communication device is applied to an AMF network element, and for beneficial effects, reference may be made to the description of the first aspect and details are not 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 functions in the method of the first aspect. The memory is coupled to the processor and retains program instructions and data necessary for the local area network communication device. The structure of the local area network communication device also comprises a communication interface used for communicating with other equipment.

In a twelfth aspect, an embodiment of the present application further provides a local area network communication apparatus, where the local area network communication apparatus is applied to a UDM network element, and for beneficial effects, reference may be made to the description of the second aspect and details are not 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 functions in the method of the second aspect. The memory is coupled to the processor and retains program instructions and data necessary for the local area network communication device. The structure of the local area network communication device also comprises a communication interface used for communicating with other equipment.

In a thirteenth aspect, an embodiment of the present application further provides a local area network communication apparatus, where the local area network communication apparatus is applied to an NRF network element, and for beneficial effects, reference may be made to the description of the third aspect and details are not 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 functions in the method of the third aspect. The memory is coupled to the processor and retains program instructions and data necessary for the local area network communication device. The structure of the local area network communication device also comprises a communication interface used for communicating with other equipment.

In a fourteenth aspect, an embodiment of the present application further provides a local area network communication device, where the local area network communication device is applied to an AMF network element, and for beneficial effects, reference may be made to the description of the fourth aspect and details are not 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 functions in the method of the fourth aspect. The memory is coupled to the processor and retains program instructions and data necessary for the local area network communication device. The structure of the local area network communication device also comprises a communication interface used for communicating with other equipment.

In a fifteenth aspect, an embodiment of the present application further provides a local area network communication apparatus, where the local area network communication apparatus is applied to an NRF network element, and for beneficial effects, reference may be made to the description of the fifth aspect and details are not 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 functions in the method of the fifth aspect. The memory is coupled to the processor and retains program instructions and data necessary for the local area network communication device. The structure of the local area network communication device also comprises a communication interface used for communicating with other equipment.

In a sixteenth aspect, 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 for receiving a data updating request sent by the OAM entity or the NEF network element, wherein the data updating request comprises LAN configuration parameters, and the LAN configuration parameters comprise an identifier of the LAN, information of a network corresponding to the LAN and a member list corresponding to the LAN; storing the association relationship between the SMF identification and the information of the network corresponding to the LAN into the subscription data of the terminal indicated by the member list corresponding to the LAN; the SMF network element corresponding to the SMF identifier is used for managing a PDU session of the terminal indicated by the member list corresponding to the LAN; and sending the association relation to the AMF network element.

The AMF network element is used for receiving the association relation from the UDM network element; receiving a PDU session establishment request sent by a first terminal, wherein the PDU session establishment request carries information of a requested network, and the first terminal is any one of terminals indicated by a member list corresponding to the LAN; determining whether a network indicated by the information of the requested network supports a local area network service; and under the condition that the network indicated by the information of the requested network supports the local area network service, acquiring the SMF identifier for managing the PDU session requested to be established by the first terminal according to the association relation and the information of the requested network.

In one possible design, the local area network communication system further includes an AF network element and an NEF network element: the AF network element is used for sending a LAN management request to the NEF network element, and the LAN management request carries LAN configuration parameters; the NEF network element is used for receiving the LAN management request; and sending a data updating request to the UDM network element.

In one possible design, the data update request further includes an SMF identifier for managing a PDU session of the terminal indicated by the member list corresponding to the LAN.

In one possible design, the NEF network element is further configured to: and acquiring an SMF identifier for managing the PDU session of the terminal indicated by the member list corresponding to the LAN through the NRF network element.

In one possible design, the information of the requested network includes first indication information of whether the network indicated by the information of the requested network supports local area network services; when determining whether the network indicated by the requested network information supports the local area network service, the AMF network element is specifically configured to: and determining whether the network indicated by the information of the requested network supports the local area network service according to the first indication information.

In one possible design, when determining whether the network indicated by the information of the requested network supports the local area network service, the AMF network element is specifically configured to: determining whether the network indicated by the requested network information supports local area network service according to the local configuration information; or, according to the subscription data of the terminal, determining whether the network indicated by the information of the requested network supports the local area network service; or, the PDU session setup request further includes second indication information that the network indicated by the information of the requested network supports the local area network service; and determining that the network indicated by the information of the requested network supports the local area network service according to the second indication information.

In one possible design, the information of the network to which the LAN corresponds or the information of the requested network includes DNN; alternatively, DNN and S-NSSAI.

In a seventeenth aspect, 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 for receiving a PDU session establishment request sent by a terminal, wherein the PDU session establishment request carries the information of a requested network; and sending an SMF query request message to an NRF network element, wherein the SMF query request message is used for requesting to acquire an SMF identifier for managing the PDU session requested to be established by the terminal, and the SMF query request message carries the information of the requested network.

The NRF network element is used for receiving the SMF query request message sent by the AMF network element; determining whether a network indicated by the information of the requested network supports a local area network service; and under the condition that the network indicated by the information of the requested network supports the local area network service, acquiring the SMF identifier for managing the PDU session requested to be established by the terminal according to the association relation between the SMF identifier and the information of the network and the information of the requested network.

In one possible design, the NRF network element is further configured to: receiving LAN configuration parameters sent by a NEF network element or an OAM entity, wherein the LAN configuration parameters comprise information of a network corresponding to the LAN; selecting an SMF for management for the LAN; and associating and storing the information of the SMF selected by the NRF and the network corresponding to the LAN to obtain an association relation.

In one possible design, the local area network communication system further includes: the AF network element is used for sending the LAN configuration parameters to the NRF network element through the NEF network element; the NEF network element is used for receiving the LAN configuration parameters from the AF network element; and sending the LAN configuration parameters to the NRF network element.

In one possible design, the information of the requested network includes first indication information of whether the network indicated by the information of the requested network supports local area network services; when determining whether the network indicated by the requested network information supports the local area network service, the NRF network element is specifically configured to: and determining whether the network indicated by the information of the requested network supports the local area network service according to the first indication information.

In one possible design, when determining whether the network indicated by the requested network information supports the local area network service, the NRF network element is specifically configured to: and determining whether the network indicated by the information of the requested network supports the local area network service according to the local configuration information.

In an eighteenth aspect, an embodiment of the present application provides a communication system, which includes an AMF network element and an NRF network element.

The AMF network element is used for receiving a PDU session establishment request sent by a terminal, wherein the PDU session establishment request carries the information of a requested network; determining whether a network indicated by the information of the requested network supports a local area network service; and under the condition that the network indicated by the information of the requested network supports the local area network service, sending an SMF query request message to an NRF network element, wherein the SMF query request message is used for carrying the information of the requested network and LAN indication information in the request, and the LAN indication information is used for indicating that the network indicated by the information of the requested network supports the local area network service.

The NRF network element is used for receiving the SMF query request message sent by the AMF network element; according to the LAN indication information, determining to acquire an SMF identifier corresponding to the requested network information from the association relationship between the SMF identifier and the network information; and sending an SMF query response message to the AMF network element, wherein the SMF query response message carries the acquired SMF identifier.

In one possible design, the NRF network element is further configured to: receiving LAN configuration parameters sent by a NEF network element or an OAM entity, wherein the LAN configuration parameters comprise information of a network corresponding to the LAN; selecting an SMF for session management for the LAN; and associating and storing the information of the SMF selected by the NRF and the network corresponding to the LAN to obtain an association relation.

In a nineteenth aspect, the present application further provides a computer-readable storage medium having stored therein instructions, which, when executed on a computer, cause the computer to perform the method of the above aspects.

In a twentieth aspect, the present application also provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the above aspects.

In a twenty-first aspect, the present application further provides a computer chip, where the chip is connected to a memory, and the chip is configured to read and execute a software program stored in the memory, and execute the method in the foregoing aspects.

Drawings

Fig. 1 is a schematic structural diagram of a first network architecture according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a second network architecture according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a third network architecture according to an embodiment of the present application;

fig. 4 is a flowchart illustrating a first local area network communication method according to an embodiment of the present application;

fig. 5 is a flowchart illustrating a second local area network communication method according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a first local area network communication system according to an embodiment of the present application;

fig. 7 is a flowchart illustrating a third local area network communication method according to an embodiment of the present application;

fig. 8 is a flowchart illustrating a fourth local area network communication method according to an embodiment of the present application;

fig. 9 is a flowchart illustrating a fifth local area network communication method according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a second local area network communication system according to an embodiment of the present application;

fig. 11 is a flowchart illustrating a sixth local area network communication method according to an embodiment of the present application;

fig. 12 is a flowchart illustrating a seventh local area network communication method according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of a third lan communication system according to an embodiment of the present application;

fig. 14 is a flowchart illustrating an eighth local area network communication method according to an embodiment of the present application;

fig. 15 to 20 are schematic structural diagrams of a lan communication device according to an embodiment of the present disclosure.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more clear, the present application will be further described in detail with reference to the accompanying drawings. The particular methods of operation in the method embodiments may also be applied to apparatus embodiments or system embodiments.

Fig. 1 is a schematic diagram of a possible network architecture to which the present application is applicable. The network architecture is a 5G network architecture. 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 (RAN). In the network architecture, terminals, AN and Core are the main parts constituting the network architecture. For network elements in the AN and Core, the network elements can be logically divided into two parts, namely a user plane and a control plane, wherein the control plane is responsible for management of the mobile network, and the user plane is responsible for transmission of service data. For example, in the network architecture shown in fig. 1, the NG2 reference point is located between the RAN control plane and the Core control plane, the NG3 reference point is located between the RAN user plane and the Core user plane, and the NG6 reference point is located between the Core user plane and the DN.

In the network architecture shown in fig. 1, the terminal is a device with wireless transceiving function, is a portal for mobile users to interact with the network, can provide basic computing power and storage capability, and displays service windows to users and accepts user operation input. In a 5G communication system, a terminal establishes signal connection and data connection with AN using a new air interface technology, thereby transmitting a control signal and service data to a network.

In particular, the terminal may be deployed on land, including indoors or outdoors, hand-held or vehicle-mounted; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.). The terminal may be a mobile phone (mobile phone), a tablet computer (pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal, an Augmented Reality (AR) terminal, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like.

In the network architecture shown in fig. 1, AN, similar to a base station in a conventional communication network, is deployed at a position close to a terminal, provides a network access function for authorized users in a specific area, and can determine transmission tunnels of different qualities according to user levels, service requirements, and the like to transmit user data. The AN can manage and reasonably utilize its own resources, provide access services to the terminal as needed, and is responsible for forwarding control signals and traffic data between the terminal and the Core.

In the network architecture shown in fig. 1, Core is responsible for maintaining subscription data of a mobile network, managing network elements of the mobile network, and providing functions such as session management, mobility management, policy management, security authentication, and the like for a terminal. For example, when the terminal is attached, the network access authentication is provided for the terminal; when a terminal has a service request, network resources are allocated to the terminal; updating network resources for the terminal when the terminal moves; when the terminal is idle, a fast recovery mechanism is provided for the terminal; when the terminal is detached, releasing network resources for the terminal; when the terminal has service data, a data routing function is provided for the terminal, such as forwarding uplink data to the DN, or receiving downlink data from the DN and forwarding to the AN.

In the network architecture shown in fig. 1, the DN is a data network that provides service to subscribers. In the actual communication process, the client is usually located at the terminal, and the server is usually located at the DN. The DN may be a private network, such as a local area network, or an external network not controlled by an operator, such as the Internet, or a proprietary network co-deployed by an operator, such as a network providing an IP multimedia network subsystem (IMS) service.

Fig. 2 is a schematic diagram of a specific network architecture suitable for the present application. The network architecture is a 5G network architecture. The network element in the 5G architecture includes a terminal, a Radio Access Network (RAN), and a Data Network (DN), and in fig. 2, the terminal is taken as User Equipment (UE) as an example. In addition, the network architecture further includes a core network element, where the core network element includes a User Plane Function (UPF) network element and a control plane function (rpf) network element. Specifically, the control plane function network element includes, but is not limited to, an access and mobility management function (AMF) network element, a Session Management Function (SMF) network element, an authentication server function (AUSF) network element, an Application Function (AF) network element, a Unified Data Management (UDM) network element, a Policy Control Function (PCF) network element, a network open function (network open function, NEF) network element, an NF repository function (NF) network element, an NRF) network element, and a Network Slice Selection Function (NSSF) network element.

Optionally, in the network architecture, the control plane function network element may further include a local area network service management function (LSMF).

In practical applications, the LSMF network element may serve as an independent physical functional entity, or may serve as a logical functional entity deployed in other network elements (e.g., NEF network element, PCF network element, UDM network element, and SMF network element).

It should be noted that, in a conventional core network architecture, a point-to-point communication mode is adopted between control plane function network elements, that is, interface communication between control plane function network elements adopts a set of specific messages, and control plane function network elements at two ends of an interface can only use the set of specific messages for communication. In the 5G core network architecture, the control plane adopts a service architecture, that is, the interaction between the control plane functional network elements adopts a service call mode, and the control plane functional network elements open services to other control plane functional network elements for the other control plane functional network elements to call.

The functions of each network element in the network architecture shown in fig. 2 are described in detail below. Since the functions of the UE, RAN and DN have been introduced in the description related to the network architecture shown in fig. 1, the following description focuses on the functions of the network elements of the respective core networks.

The UPF network element is a functional network element of a user plane, and is mainly responsible for connecting an external network, and includes related functions of a Serving Gateway (SGW) and a packet data network gateway (PDN-GW) of Long Term Evolution (LTE). Specifically, the UDF may perform user packet forwarding according to the routing rule of the SMF, such as sending uplink data to the DN or other UPFs; the downlink data is forwarded to other UPFs or RANs.

The AMF network element is responsible for access management and mobility management of the UE, such as responsible for state maintenance of the UE, reachability management of the UE, forwarding of a non-mobility management non-access-stratum (MM NAS) message, and forwarding of a Session Management (SM) N2 message. In practical application, the AMF network element can implement a mobility management function in an MME in an LTE network framework and also implement an access management function.

The SMF network element is responsible for session management, and allocates and releases resources for the session of the UE; including quality of service (QoS) for the session, session path, forwarding rules, etc.

The AUSF network element is used for executing the safety authentication of the UE.

The AF network element may be an application control platform of a third party, or may be a device of an operator itself, and the AF network element may provide services for a plurality of application servers.

The UDM network element may store subscription information for the UE.

The PCF network element is used for performing user policy management, and is similar to a Policy and Charging Rules Function (PCRF) network element in LTE, and is mainly responsible for generating policy authorization, service quality and charging rules, and issuing corresponding rules to a UPF network element through the SMF network element, thereby completing installation of corresponding policies and rules.

The NEF network element is configured to open a network function to a third party in a manner of an Application Programming Interface (API).

The NRF network element is used for providing the storage and selection functions of the network function entity information for other network elements.

The NSSF network element is configured to select a network slice for the UE.

The network architecture shown in fig. 2 may also include LSMF network elements. The LSMF network element is used for LAN type service area management.

The network element related to the present application mainly includes: UE, AMF, SMF, UDM, NRF and NEF.

It should be noted that, in the embodiment of the present application, the AMF, SMF, UDM, NRF, NEF, and the like are referred to as network elements only for illustration. In practice, a network element may also be referred to as an instance or network function entity. For example, a UDM network element may also be referred to as a UDM instance, UDM network functional entity; the AMF network element may also be referred to as an AMF instance, AMF network functional entity.

It should also be noted that, when implementing the functions of the UDM network element described in this embodiment of the present application, the UDM network element may be implemented by interacting with a same data repository (UDR) network element, where the UDR network element is used to store data required by the UDM network element when performing the operations thereof, and the UDM network element is used to interact with other network elements. For example, data such as an association between the SMF identifier and information of the requested network, SMF selection subscription data of the terminal, and the like may be stored as subscription data or application data in the UDR network element. In actual implementation, 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.

In particular, a network architecture supporting 5GLAN type services may be as shown in fig. 3. In fig. 3, the UE establishes a session to the UPF node, thereby accessing to the user plane of the 5 GLAN; the UDM network element/UDR network element mainly provides a management function of 5GLAN type services; after the UE initiates a session, the scheme provided by the embodiment of the application is adopted to select the SMF network element, and the selected SMF network element is responsible for managing the session initiated by the UE.

In the following, basic concepts related to embodiments of the present application are explained. It should be noted that these explanations are intended to make the present application more understandable, and should not be construed as limiting the scope of protection claimed in the present application.

One, SMF mark

In this embodiment of the present application, the SMF network element identified by the SMF identifier (which may also be referred to as an SMF ID) is used to manage a PDU session initiated by a terminal. Specifically, the SMF identifier may be a character string, an address (e.g., an IP address), or a Full Qualified Domain Name (FQDN) in format.

As described in the background, sessions in which all terminals within the same LAN group are connected to the 5GLAN are under the management control of the same SMF network element. When a terminal initiates a 5GLAN session, it is necessary to select the same SMF network element for all terminals in the LAN group, so that data exchange between the terminals in the LAN group can be realized under the management of the SMF network element.

In addition, it should be noted that the SMF flag described in the embodiment of the present application may also be replaced by an SMF Set flag (SMF Set). The SMF Set may include a plurality of SMF network elements, each of the SMF network elements shares a context, and the plurality of SMF network elements in one SMF Set are backup to each other, that is, the plurality of SMF network elements in one SMF Set may cooperate with each other, and when a certain SMF network element crashes, other SMF network elements in the SMF Set may replace the SMF network element. It is understood that, for terminals in the same LAN group, the PDU session initiated by the terminal and used for establishing local area network communication may be managed by any SMF network element in the SMF Set.

Illustratively, if the SMF Set includes four SMF network elements, i.e., SMF1, SMF2, SMF3, and SMF 4; when a terminal a in the LAN group initiates a PDU session, the PDU session may be managed by any SMF network element of SMF1, SMF2, SMF3 and SMF4, for example, SMF 1; when the terminal a initiates a new PDU session again, the PDU session may be managed by any SMF network element of SMF1, SMF2, SMF3 and SMF4, which may be, for example, SMF 2.

That is to say, if the local area network communication scheme provided by the embodiment of the present application is adopted to obtain the SMF ID, the PDU session initiated by the terminal and used for establishing the local area network communication may be managed through the SMF network element identified by the SMF ID; if the scheme provided by the embodiment of the application is adopted to obtain the SMF Set ID, the PDU session initiated by the terminal and used for establishing the local area network communication can be managed through any SMF network element in the SMF Set identified by the SMF Set ID. In the description of the embodiment of the present application, the acquisition of the SMF ID is taken as an example for introduction, and details about the implementation manner of acquiring the SMF Set ID are not described again.

Second, information of network

In the embodiment of the present application, the network information carried in the PDU session establishment request may be used to indicate a network requested to be accessed by the terminal when initiating the PDU session. For example, a data network name (e.g., DNN) corresponding to the PDU session of the terminal may be indicated, or network slice information (e.g., S-NSSAI) and a data network name corresponding to the PDU session of the terminal may also be indicated.

The information of the network may be a Full Qualified Domain Name (FQDN), a single handover selection assistance information (S-NSSAI), a Virtual Local Area Network (VLAN) identifier (VID), a string, an internal group identifier (internal group identifier), an external group identifier (external group identifier), a serial number, or a special domain name, such as a Data Network Name (DNN). In addition, the information of the network may also be in some special formats, for example, the information of the network may also include provider information, operator information, network information, domain information, and the like. The information of the network may also be, in particular, a combination of the various options mentioned above, such as DNN + S-NSSAI.

An implementation objective of the embodiment of the present application is to select an SMF network element for PDU session management for a terminal in a LAN group, so that after a network side (e.g., an AMF network element) receives a PDU session establishment request of the terminal, only when it is determined that a PDU session initiated by the terminal this time is to request a LAN-type service (i.e., it is determined that a network indicated by information of the network requested by the terminal supports a local area network service), the SMF network element is selected for the PDU session according to the scheme provided by the embodiment of the present application. Specifically, the determination may be performed in the following two ways.

The first mode is as follows: the first indication information in the information of the network is directly determined.

Taking the information of the network as DNN as an example, the first indication information in the DNN may be used to indicate that the DNN is reserved for LAN-type services. For example, certain fields in the DNN may be used to identify LAN categories and certain fields may be used to identify group information for LANs. Then, the LAN class information and the group information of the LAN may be regarded as first indication information, and after receiving the DNN, the network side (e.g., an AMF network element or an NRF network element) may determine, directly according to the first indication information in the DNN, that the network indicated by the information of the network requested by the terminal supports the local area network service.

Taking the information of the network as DNN + S-NSSAI as an example, some fields in DNN can be used for identifying the LAN type, and some fields in S-NSSAI can be used for identifying the group information of the LAN; alternatively, certain fields in the DNN may be used to identify and certain fields in the group information S-NSSAI for the LAN may be used to identify the LAN class. Then, the LAN class information and the group information of the LAN may be regarded as first indication information, and after receiving the DNN + S-NSSAI, the network side (e.g., an AMF network element or an NRF network element) may directly 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.

The second mode is as follows: determined from information other than that of the network.

In the second way, the AMF network element or the NRF network element may determine whether the network indicated by the network information supports the local area network service according to the local configuration information; the local configuration information may be, for example, a list that describes the set of information for all networks that support local network services. When 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 the local area network service. For example, the AMF network element or the NRF network element is preconfigured with the local configuration information, and when the AMF network element or the NRF network element receives network information carried in a PDU session establishment request sent by the terminal, it determines, according to the preconfigured local configuration information, that the network indicated by the network information requested by the terminal supports the local network service. In this manner, the network supporting the local area network services is operator specific reserved for the LAN.

In the second manner, the AMF network element may further determine whether the network indicated by the network information supports the local area network service according to the subscription data of the terminal. For example, the subscription data of the terminal may further include corresponding indication information to indicate whether the network indicated by the information of the network supports the local area network service.

In addition, when receiving a PDU session establishment request of a terminal, the AMF network element inquires whether an association relationship between an SMF identifier and information of the requested network exists according to the information of the network requested in the PDU session establishment request, and if so, the AMF network element determines that the network indicated by the information of the network requested by the terminal supports local area network service.

In the second manner, the AMF network element may also determine, according to second indication information carried in a PDU session establishment request sent by the terminal, that the network indicated by the information of the network requested by the terminal supports the local area network service. Specifically, the second indication information may be one or more of request type information (request type), session type information (session type), or a new element (IE) (such as a LAN id). For example, an information element (e.g. 5GLAN ID or 5GLAN indication) may be added in the PDU session setup request based on the prior art, for indicating that the network requested in the PDU session setup request supports the local area network service.

It should be noted that, in the following description of the embodiments of the present application, the above three modes may be partially or completely applied, and the details will be described in the following embodiments.

Three, LAN identification

The LAN identity may be understood as an identity of a LAN group, which may also be referred to as a LAN identity. That is, the LAN identification may be used to identify a LAN group or a particular LAN type service. The terminals identified by the same LAN identifier belong to the same LAN group, and can use the LAN type service corresponding to the LAN identifier, that is, LAN communication can be performed between the terminals identified by the same LAN identifier. Under the 5G network architecture, the LAN identity may also be referred to as a 5GLAN identity.

Illustratively, when initiating a session, a terminal may carry a LAN identifier in a non-access-stratum (NAS) message of a PDU session establishment request to indicate that the terminal belongs to a LAN group to which the LAN identifier corresponds. An operation and maintenance administration and maintenance (OAM) entity or an AF network element may also carry a LAN identifier in a LAN configuration parameter sent to the UDM network element or the NRF network element by the NEF network element, so as to indicate that the LAN configuration parameter is used for configuring a LAN group corresponding to the LAN identifier. The OAM entity is a configuration interface in a network management system of an operator and faces the operator; an operator may configure parameters on network elements in a mobile network directly through an OAM entity.

Fourth, LAN configuration parameters (also can be called 5GLAN configuration parameters)

The LAN configuration parameters may be provided by the AF network element through the NEF network element, or may be provided by the OAM entity. The LAN configuration parameters may include one or more of the following:

(1) LAN identification (also referred to as group identifier) to define a 5GLAN group in a 5G network;

(2) information of the network corresponding to the LAN for identifying the network corresponding to the LAN group, which may include, for example, DNN, or DNN + S-NSSAI;

(3) a member list corresponding to the LAN, for indicating member terminals in the LAN group;

(4) the LAN configuration parameters may also include PDU session type information.

After the UDM network element (or the NRF network element) receives the 5GLAN configuration parameters, it may write the relevant data in the 5GLAN configuration parameters into the subscription data of each member terminal in the LAN group.

In particular, in order to select the same SMF network element for session management for a PDU session initiated by a terminal in the 5GLAN group and used for establishing local area network communication, an association relationship between the SMF identifier and information of a network corresponding to the LAN may be written into subscription data of each member terminal of the LAN. Meanwhile, optionally, the network indicated by the information indicating the network corresponding to the LAN in the subscription data of the terminal may support the local area network service. The SMF identifier may be provided by an NEF network element or an OAM entity, or an NRF network element may be queried and obtained by the NEF network element or a UDM network element, which is not limited in this embodiment of the present application.

Fifth, association relationship

In the embodiment of the present application, the association relationship is an association relationship between the SMF identifier and information of the network. The SMF network element identified by the SMF identification is used for managing a PDU session initiated by the terminal and used for establishing local area network communication.

As mentioned above, all the PDU sessions initiated by all terminals in the same LAN group for establishing LAN communication need to be under the management control of the same SMF network element (or the same SMF set).

In addition, after the association relationship is established, if any terminal in the LAN group initiates a session again, the same SMF network element may be selected for the terminal according to the association relationship, so that when all terminals in the LAN group request LAN-type services, PDU sessions are managed by the same SMF network element.

The application provides a local area network communication method, device and system, which are used for selecting an SMF network element for a terminal when the terminal initiates a PDU session.

In the present application, the plural number means two or more. In addition, it is to be understood that the terms first, second, etc. in the description of the present application are used for distinguishing between the descriptions and not necessarily for describing a sequential or chronological order.

In the following, three embodiments will be described for the lan communication scheme provided in the present application.

Example one

Referring to fig. 4, a flowchart of a local area network communication method provided in the embodiment of the present application is schematically shown.

S401: and the AMF network element receives a PDU session establishment request sent by the terminal.

Wherein, the PDU session establishment request carries the information of the requested network. Illustratively, the requested network information may be DNN, S-NSSAI, or DNN + S-NSSAI.

S402: the AMF network element determines whether the network indicated by the information of the requested network supports local area network services.

The AMF network element determines that the network indicated by the requested network information supports local area network services, that is, the terminal requests a LAN type service when initiating a PDU session this time, and the PDU session may be regarded as a LAN session.

It should be noted that, in the embodiment of the present application, the terminal cannot sign a local area network service and other non-local area network services for the requested information of the network at the same time.

Specifically, in S402, there may be various ways for the AMF network element to determine whether the network indicated by the information of the requested network supports the local area network service. For details, reference may be made to the above description, which is not repeated here.

S403: and under the condition that the network indicated by the information of the requested network supports the local area network service, the AMF network element acquires the SMF identifier according to the association relation 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 identification is used for managing a PDU session initiated by the terminal and used for establishing local area network communication.

The AMF network element may obtain subscription data of the terminal from the UDM network element, and the subscription data of the terminal carries the association relationship.

In a possible implementation manner, the AMF network element may obtain the subscription data in a registration process of the terminal.

Optionally, the association relationship may be carried in SMF selective subscription data, where the SMF selective subscription data is a part of subscription data of the terminal.

In another possible implementation manner, the AMF network element sends a numm _ SDM _ Get Request message to the UDM network element to Request to acquire subscription data of the terminal, where the subscription data carries information of a requested network and an identifier of the terminal, and may also carry subscription data type information (subscription data type). After receiving the numm _ SDM _ Get Request message, the UDM network element may send a numm _ SDM _ Get Response message, which carries subscription data of the terminal, to the AMF network element.

In another possible implementation manner, the AMF network element may obtain the association relationship from the UDM network element in a Subscription Profile Update Notification procedure (Subscription Profile Update Notification procedure) of the terminal. In the prior art, the AMF network element obtains updated subscription data from the UDM network element in a subscription manner. That is, after the subscription data of a certain terminal in the UDM network element changes, the UDM network element will Notify the updated subscription data to the AMF network element through a Notification message (e.g., numm _ SDM _ Notification message).

In the above implementation, before the UDM network element sends the association relationship to the AMF network element, the association relationship is first obtained; then, the UDM network element stores the association relationship in the subscription data of each member terminal in the LAN group. Alternatively, the association relationship may be stored in SMF selection subscription data (SMF selection subscription data) of each member terminal in the LAN group.

Therefore, for each member terminal in the LAN group, the association relationship is stored in the subscription data of the terminal, and then, after the AMF network element receives a PDU session establishment request for establishing local area network communication sent by any terminal in the LAN group, the AMF network element can obtain the association relationship from the subscription data of the terminal, and further select the same SMF network element for management of the PDU sessions initiated by all terminals in the LAN group for establishing local area network communication. By adopting the scheme, the AMF network element does not need to go to the NRF network element to inquire the SMF ID list for managing the PDU session like the prior art, but directly obtains the association relationship from the signed data, and further determines the SMF identifier of the SMF network element for managing the PDU session initiated by the terminal and used for establishing local area network communication according to the association relationship and the network information requested by the terminal.

During specific implementation, the UDM network element may obtain the association relationship in a plurality of ways.

The UDM receives a data updating request sent by an AF network element through an NEF network element; or the UDM network element receives a data update request sent by the OAM entity. The data update request carries LAN configuration parameters, where the definition of the LAN configuration parameters is as described above and is not described herein again.

In a possible implementation manner, the data update request further includes an SMF identifier. After receiving the data update request, the UDM network element stores the association relationship between the SMF identifier and the information of the network corresponding to the LAN (i.e., the information of the network carried in the LAN configuration parameters) into the subscription data of each terminal indicated by the member list corresponding to the LAN.

In another possible implementation manner, the data update request does not include the SMF identifier; in this case, the association relationship may be obtained in two possible ways: (1) the NEF network element queries the NRF network element according to the data updating request, and obtains a candidate SMF identifier for managing the session initiated by the terminal; the NEF network element selects one of the candidate SMF identifications as the SMF identification (the NRF network element can also directly return only one SMF identification); then, the NEF network element sends the SMF identification and the LAN configuration parameter to the UDM network element; and the UDM network element stores the association relation between the SMF identification and the information of the network corresponding to the LAN into the subscription data of each terminal indicated by the member list corresponding to the LAN. (2) After receiving the data updating request, the UDM queries an NRF network element according to the data updating request and acquires a candidate SMF identifier for managing a session initiated by a terminal; the UDM network element selects one of the candidate SMF identifications as the SMF identification (the NRF network element can directly return only one SMF identification); and the UDM network element stores the association relation between the SMF identification and the information of the network corresponding to the LAN into the subscription data of each terminal indicated by the member list corresponding to the LAN.

Further, the UDM network element may send a subscription data update notification to the AMF network element, where the subscription data update notification includes the association relationship. Then, after the terminal sends the PDU session establishment request, the SMF id may be determined according to the updated association relationship.

When the above implementation manner is adopted, the local area network communication method provided in the first embodiment may be as shown in fig. 5. In the method shown in fig. 5, the UDM network element receives a data update request sent by the NEF network element, where the data update request carries the LAN configuration parameter and the SMF identifier. The LAN configuration parameters include information of a network corresponding to the LAN. And after receiving the data updating request, the UDM network element stores 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 updated subscription data to the AMF network element through the subscription data updating notification. After receiving the PDU session establishment request from the terminal, the AMF network element may determine the SMF identifier according to the association relationship in the updated subscription data.

In addition, in the first embodiment, a communication system is further provided, as shown in fig. 6, the communication system includes an AMF network element and a UDM network element.

The UDM network element is configured to perform the relevant operations of the UDM network element in the first embodiment, and the AMF network element is configured to perform the relevant operations of the AMF network element in the first embodiment.

Optionally, the communication system shown in fig. 6 further includes an AF network element and an NEF network element.

The AF network element is used for sending a LAN management request to the NEF network element, and the LAN management request carries LAN configuration parameters. The NEF network element is used for receiving the LAN management request; and sending a data updating request to the UDM network element.

The data updating request further includes an SMF identifier for managing a PDU session of the terminal indicated by the member list corresponding to the LAN.

Referring to fig. 7, the method for providing another local area network communication method according to the embodiment of the present application may be regarded as a specific implementation manner of the first embodiment, and the method takes network information as DNN as an example. The method comprises the following steps:

1. the NEF obtains a 5GLAN management request of the AF.

The 5GLAN management request may include LAN configuration information and an SMF ID, or may include only LAN configuration information, for example, the LAN configuration information includes DNN. And 5, the SMF ID in the GLAN management request is used for indicating an SMF network element for managing the PDU session which is established by the member terminal corresponding to the LAN and is used for local area network communication. If the 5g LAN management request does not include the SMF ID, the NEF may query the NRF and select one SMF ID from the SMF list returned by the NRF network element as the SMF network element that manages the PDU session for local area network communication established by the member terminal corresponding to the LAN.

2. OAM or NEF configures DNN, SMF ID, UE ID to UDM.

Besides DNN, OAM or NEF may also configure other 5GLAN configuration parameters to the UDM, as described above, and since the other 5GLAN configuration parameters have less relevance to the scheme of the embodiment of the present application, details are not described here again.

3. After receiving the configuration, the UDM may store the association between the DNN and the SMF ID in the UE subscription data indicated by the UE ID.

4. And the UE sends the NAS message to the AMF network element.

The NAS message may carry PDU session ID, DNN, among others. The NAS message may be considered a PDU session setup request.

The DNN may be regarded as information of a network requested by the terminal. The DNN may include first indication information, and after receiving the DNN, the AMF may determine, according to the first indication information, that the network indicated by the network information requested by the terminal supports the local area network service, and further determine to execute subsequent steps, and select an SMF network element for a PDU session initiated by the terminal and used for establishing local area network communication.

In addition, the AMF may also determine, through other implementation manners described in the first embodiment, that the DNN reserved for the 5GLAN type service is carried in the NAS message, which is not described herein again.

5. Alternatively, if the AMF does not locally save the subscription data of the UE, the AMF sends a Nudm _ SDM _ Get request message to the UDM to request acquisition of the subscription data.

6. The UDM sends a numm SDM Get response message to the AMF.

The Nudm _ SDM _ Get response message carries UE subscription data, and the UE subscription data contains the association relationship between DNN and SMF ID.

7. AMF authenticates UE request according to subscription; and selecting the SMF according to the association relation and the DNN acquired from the NAS message. The selected SMF is used to manage the PDU session initiated by the UE in step 4.

Then, each network element in fig. 7 may interactively execute steps 3 to 20 of the PDU session establishment procedure in the existing standard to establish the PDU session.

Referring to fig. 8, the method for providing another local area network communication method according to the embodiment of the present application may be regarded as a specific implementation manner of the first embodiment, and the method takes network information as DNN as an example.

1. The NEF obtains a 5GLAN management request of the AF.

2. OAM or NEF sends 5GLAN configuration parameters to UDM.

Wherein, the 5GLAN configuration parameters include DNN.

3. And after receiving the 5GLAN configuration parameters, the UDM sends a request to the NRF to acquire an SMF list for managing the session.

4. The UDM receives the SMF list returned by the NRF.

5. And the UDM selects an SMF ID from the SMF list and establishes an association relation between the DNN and the SMF ID. The UDM inserts the association into the UE subscription data indicated by the UE ID.

The SMF ID selected by the UDM is the ID of the SMF performing session management this time.

6. The UE sends a NAS message to the AMF.

The DNN may be regarded as information of a network requested by the terminal. The DNN may include first indication information, and after receiving the DNN, the AMF may determine, according to the first indication information, that the network indicated by the network information requested by the terminal supports the local area network service, and further determine to execute subsequent steps to select an SMF network element for a PDU session initiated by the terminal and used for establishing local area network communication.

7. Optionally, if the AMF does not locally store the subscription data of the UE, the AMF sends a Nudm _ SDM _ Get request message to the UDM to request to acquire the subscription data of the UE.

8. The UDM sends a numm SDM Get response message to the AMF.

The Nudm _ SDM _ Get response message carries subscription data of the UE, and the subscription data contains an association relationship between DNN and SMF ID.

9. AMF authenticates UE request according to subscription; and selecting the SMF according to the association relation and the DNN acquired from the NAS message. The selected SMF is used to manage the PDU session initiated by the UE in step 6.

Then, each network element in fig. 8 may interactively execute steps 3 to 20 of the PDU session establishment procedure in the existing standard to establish the PDU session.

It should be noted that, in the description of the embodiment of the present application, the SMF ID is determined by the AMF as an example for introduction, and in actual implementation, the NRF query may obtain the SMF Set ID list, and the AMF finally determines the SMF Set ID, and selects the SMF network element according to the SMF Set ID. The specific meaning and corresponding implementation of the SMF Set are described above, and therefore are not described in detail in the embodiments.

Example two

Fig. 9 is a schematic flow chart of a local area network communication method provided in the embodiment of the present application.

S901: and the NRF network element receives the SMF query request message sent by the AMF network element.

The SMF query request message is used for requesting to acquire an SMF identifier of an SMF network element for managing a PDU session requested to be established by a terminal, and carries information of the requested network.

Specifically, 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.

Illustratively, the SMF query Request message may be an nrf _ NFDiscovery Request message. The information of the requested network includes DNN; or DNN and S-NSSAI.

S902: the NRF network element determines whether the network indicated by the information of the requested network supports local area network services.

Wherein the NRF network element determines whether the network indicated by the information of the requested network supports local area network traffic, i.e. the indication information indicating the requested network supports LAN type services.

After the NRF network element determines that the network indicated by the requested network information supports the local area network service, the NRF network element executes the subsequent steps, so that an SMF network element is selected for the PDU session requested to be established by the terminal, and the PDU session initiated by the terminal and used for establishing the local area network communication is managed.

The NRF network element determines whether the network indicated by the requested network information supports the local area network service, which may be implemented in various manners as described above. And will not be described in detail herein.

S903: and under the condition that the network indicated by the information of the requested network supports the local area network service, the NRF network element acquires the SMF identifier according to the association relation between the SMF identifier and the information of the network and the information of the requested network.

Wherein, the SMF network element identified by the SMF identification is used for managing the PDU session.

S904: and the NRF network element sends an SMF query response message to the AMF network element, wherein the SMF query response message carries the SMF identifier.

Illustratively, the SMF query Response message may be an nrf _ NFDiscovery Response message.

In a specific implementation, the NRF network element may obtain the association relationship before receiving the SMF query request message sent by the AMF network element. The NRF network element may obtain the association relationship in the following two implementation manners.

Implementation mode one

The NRF network element may obtain the SMF identifier and the LAN configuration parameter sent by the NEF network element or the OAM entity.

After receiving the LAN configuration parameter and the SMF identifier, the NRF network element may store an association relationship between the SMF identifier and information of a network corresponding to the LAN (that is, information of the network carried in the LAN configuration parameter).

Implementation mode two

The NRF network element may obtain the association relationship by: before the NRF network element acquires the association relationship, the NRF network element receives a LAN configuration parameter sent by the NEF network element or the OAM entity, where the LAN configuration parameter includes information of a network corresponding to the LAN. The NRF network element selects SMF for session management for the LAN; then, the NRF network element stores the SMF selected by the NRF and the information of the network corresponding to the LAN in an associated manner to obtain the association relationship.

Illustratively, the information of the network to which the LAN corresponds includes DNN; or DNN and S-NSSAI.

Specifically, the NRF network element may determine a candidate SMF identifier for managing the PDU session first; then, selecting an SMF identifier from the candidate SMF identifiers; and finally, establishing the association relation between the SMF identification and the information of the network.

In addition, in a possible implementation manner, the UDM network element may also directly obtain the SMF identifier after querying the NRF network element.

In the second implementation, the LAN configuration parameter includes information of a network corresponding to the LAN, but the LAN configuration parameter does not explicitly indicate an SMF identifier of an SMF network element for managing the PDU session. That is to say, the NRF network element cannot directly obtain the association relationship, but needs to obtain the candidate SMF identifiers through local query, select one of the SMF identifiers, and establish the association relationship between the SMF identifier and the network information.

In addition, in the second embodiment, a communication system is further provided, as shown in fig. 10, the communication system includes an AMF network element and an NRF network element.

The AMF network element is configured to perform the relevant operation of the AMF network element in the second embodiment, and the NRF network element is configured to perform the relevant operation of the NRF network element in the second embodiment.

Optionally, the communication system shown in fig. 10 further includes an AF network element and an NEF network element.

In one implementation, the AF network element is configured to send the LAN configuration parameters to the NRF network element through the NEF network element; the NEF network element is used for receiving the LAN configuration parameters from the AF network element; and sending the LAN configuration parameters to the NRF network element.

Referring to fig. 11, the method for providing another local area network communication method according to the embodiment of the present application may be regarded as a specific implementation manner of the second embodiment, and the method takes network information as DNN as an example.

1. The NEF obtains a 5GLAN management request of the AF.

The 5GLAN management request may include LAN configuration information and an SMF ID, or may include only LAN configuration information. The LAN configuration information includes DNN. The SMF ID in the 5GLAN management request is used for indicating an SMF network element for managing a PDU session for local area network communication established by a member terminal corresponding to the LAN. If the 5g LAN management request does not include the SMF ID, the NEF may query the NRF network element and select one SMF ID from the SMF list returned by the NRF network element as the SMF network element that manages the PDU session for local area network communication established by the member terminal corresponding to the LAN.

2. OAM or NEF configures DNN and SMF ID to NRF.

3. The NRF may save the association of the DNN and SMF ID after receiving the configuration.

If OAM or NEF configures DNN, SMF ID to NRF, NRF can directly acquire the association relationship. In another implementation, if OAM or NEF only configures DNN to NRF, NRF may establish the above-mentioned association by querying and selecting candidate SMF IDs.

4. And the UE sends the NAS message to the AMF network element.

Optionally, after the UE sends the NAS message, the AMF may interact with the UDM to obtain subscription data of the UE. This process is prior art and will not be described herein.

The NAS message may carry PDU session ID, DNN, among others. The NAS message may be considered a PDU session setup request. The DNN may be regarded as information of a network requested by the terminal.

5. And the AMF sends an Nnrf _ NFdiscovery request message to the NRF, wherein the Nnrf _ NFdiscovery request message carries DNN.

6. NRF determines DNN; and selecting the SMF ID according to the association relationship stored in the step 3.

The DNN may include first indication information. NRF determines the meaning of DNN: after receiving the DNN, the NRF may determine, according to the first indication information, that the network indicated by the network information requested by the terminal supports the local area network service, and further determine to execute the subsequent steps to select an SMF network element for a PDU session initiated by the terminal and used for establishing local area network communication.

In addition, the NRF may also determine, through other implementation manners described in the second embodiment, that the NAS message carries the DNN reserved for the 5 GLAN-type service, which is not described herein again.

7. And the NRF sends an Nnrf _ NFdiscovery response message to the AMF, wherein the Nnrf _ NFdiscovery response message carries the SMF ID selected in the step 6.

Then, each network element in fig. 11 may interactively execute steps 3 to 20 of the PDU session establishment procedure in the existing standard to establish the PDU session.

EXAMPLE III

Referring to fig. 12, a flowchart of a local area network communication method provided in the embodiment of the present application is schematically shown.

S1201: and the AMF network element receives a PDU session establishment request sent by the terminal.

The PDU session establishment request carries the information of the requested network. Illustratively, the requested network information may be DNN, S-NSSAI, or DNN + S-NSSAI.

S1202: the AMF network element determines whether the network indicated by the information of the requested network supports local area network services.

The AMF network element determines that the network indicated by the requested network information supports local area network services, namely the PDU session initiated by the terminal at this time is requested to be LAN type services, the PDU session can be regarded as the LAN session, and the AMF network element can execute subsequent steps, so that an SMF network element is selected for the LAN type services requested by the terminal, and the PDU session initiated by the terminal and used for establishing local area network communication is managed.

Specifically, in S1202, there may be multiple ways for the AMF network element to determine whether the network indicated by the information of the requested network supports the local area network service. Reference is made in detail to the preceding description, which is not repeated here.

S1203: and under the condition that the network indicated by the requested network information supports the local area network service, the AMF network element sends an SMF inquiry request message to the NRF network element.

The SMF inquiry request message carries information of a requested network and LAN indication information, and the LAN indication information is used for indicating that the network indicated by the information of the requested network supports local area network services.

Illustratively, the SMF query Request message may be an nrf _ NFDiscovery Request message.

S1204: and 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.

That is, after receiving the SMF query request message, the NRF network element determines, according to the LAN indication information in the SMF query request message, that the network indicated by the network information requested by the terminal supports the local area network service. The NRF network element may then perform the subsequent steps to select an SMF network element for the terminal-requested PDU session to manage the PDU session.

Specifically, if the terminal is the first terminal initiating a PDU session request in the LAN group, the NRF network element may first determine a candidate SMF identifier for managing a PDU session of the terminal in the LAN group when acquiring the SMF identifier; then selecting an SMF identifier from the candidate SMF identifiers; meanwhile, the NRF network element may establish the above-mentioned association relationship.

Specifically, if the terminal is not the first terminal initiating the PDU session request in the LAN group, the NRF network element may determine the SMF identifier according to the previously stored association relationship and the requested network information when acquiring the SMF identifier.

In addition, the NRF network element may also obtain the association relationship by interacting with the NEF network element or the OAM entity in a manner described in the first embodiment or the second embodiment, which is not described herein again.

S1205: and the NRF network element sends an SMF query response message to the AMF network element, wherein the SMF query response message carries the SMF identifier.

In addition, in the third embodiment, a communication system is further provided, as shown in fig. 13, the communication system includes an AMF network element and an NRF network element.

The AMF network element is configured to perform the relevant operation of the AMF network element in the third embodiment, and the NRF network element is configured to perform the relevant operation of the NRF network element in the third embodiment.

In addition, the communication system may further include an AF network element and an NEF network element, and functions of the AF network element and the NEF network element are the same as those of the AF network element and the NEF network element in the second embodiment, and are not described herein again.

Referring to fig. 14, the method for providing another local area network communication method according to the embodiment of the present application may be regarded as a specific implementation manner of the second embodiment, and the method takes network information as DNN as an example.

1. The NEF obtains a 5GLAN management request of the AF.

The 5GLAN management request may include LAN configuration information and an SMF ID, or may include only LAN configuration information, where the LAN configuration information includes a DNN. The SMF ID in the 5GLAN management request is used for indicating an SMF network element for managing a PDU session for local area network communication established by a member terminal corresponding to the LAN. If the 5g LAN management request does not include the SMF ID, the NEF may query the NRF network element and select one SMF ID from the SMF list returned by the NRF network element as the SMF network element that manages the PDU session for local area network communication established by the member terminal corresponding to the LAN.

2. The OAM or NEF sends 5 the GLAN configuration parameters, including DNN, to the NRF.

Optionally, the OAM or NEF may also send the SMF ID to the NRF.

3. The UE sends a NAS message to the AMF.

Optionally, after the UE sends the NAS message, the AMF may interact with the UDM to obtain SMF selective subscription data. This process is prior art and will not be described herein.

The NAS message may carry PDU session ID, DNN, among others. The NAS message may be considered a PDU session setup request. The DNN may be regarded as information of a network requested by the terminal, and after receiving the DNN, the AMF may determine, according to the first indication information in the DNN, that the DNN is a DNN reserved for a LAN-type service, and further determine to perform subsequent steps to select an SMF network element for a PDU session initiated by the terminal and used for establishing local area network communication.

In addition, the AMF may also determine that the NAS message carries the DNN reserved for the 5GLAN type service in other manners described above, which is not described herein again.

4. And the AMF sends an Nnrf _ NFdiscovery request message to the NRF, wherein the Nnrf _ NFdiscovery request message carries DNN and 5GLAN indications.

The DNN carried in the nrf _ NFDiscovery request message may be regarded as information of a network requested by the terminal.

5. The NRF queries the SMF list according to the DNN and the 5GLAN indication, and selects an SMF ID from the SMF list; the association of the DNN with the SMF ID is then saved.

After receiving the 5GLAN indication, the NRF may determine that DNN reserved for the 5GLAN type service is carried in the nrrf _ NFDiscovery request message, that is, determine that the network indicated by the network information requested by the terminal supports the local area network service, thereby performing subsequent steps and selecting an SMF network element for the PDU session initiated by the terminal.

6. And the NRF sends an Nnrf _ NFdiscovery response message to the AMF, wherein the Nnrf _ NFdiscovery response message carries the SMF ID selected in the step 6.

Then, each network element in fig. 14 may interactively execute steps 3 to 20 of the PDU session establishment procedure in the existing standard to establish the PDU session.

7. And initiating a session establishment request by another member UE in the 5GLAN group corresponding to the DNN.

Optionally, after the UEs initiate the session establishment request, the AMF may interact with the UDM to obtain subscription data of the UEs.

8. And the AMF sends an Nnrf _ NFdiscovery request message to the NRF, wherein the Nnrf _ NFdiscovery request message carries DNN and 5GLAN indications.

9. The NRF selects the SMF ID according to the DNN and the stored association relation.

After receiving the 5GLAN indication, the NRF may determine that DNN reserved for the 5GLAN type service is carried in the nrrf _ NFDiscovery request message, thereby performing subsequent steps and selecting an SMF network element for the PDU session initiated by the terminal.

10. The NRF sends an nrrf _ NFDiscovery response message to the AMF, where the NRF carries the SMF ID selected in step 9.

Wherein, the SMF ID selected in step 9 is the SMF ID selected in step 6.

It is obvious that, in the embodiment, the scheme of the present application is implemented by interacting an AMF network element and a UDM network element, and in both the second embodiment and the third embodiment, the scheme of the present application is implemented by interacting an AMF network element and an NRF network element, but the difference between the second embodiment and the third embodiment is that, in the second embodiment, after receiving a PDU session establishment request, the AMF network element does not determine whether a network indicated by information of a network requested by a terminal supports a local area network service, but sends 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 information of the network requested by the terminal supports the local area network service according to local configuration or according to first indication information in the information of the requested network, thereby performing a subsequent process. In the third embodiment, 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 the local area network service, and then carries a LAN indication information in the SMF query request message, and the NRF network element may determine that the network indicated by the network information requested by the terminal supports the local area network service according to the LAN indication information, thereby performing 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 network information requested by the terminal supports the local area network service, the SMF is directly determined according to the subscription data of the terminal, and it is not necessary to request the SMF ID from the NRF network element as in the prior art; in the third embodiment, after determining that the network indicated by the network information requested by the terminal supports the local area network service, the AMF network element still requests the SMF ID from the NRF network element as in the prior art, but when requesting the SMF ID from the NRF network element, compared with the prior art, the AMF network element carries one more LAN indication information.

Based on the same inventive concept, the embodiment of the present application further provides a local area network communication device, which can be used to execute the function of the AMF network element in the method shown in the first embodiment. Referring to fig. 15, the local area network communication apparatus 1500 includes a reception unit 1501 and a processing unit 1502.

A receiving unit 1501, configured to receive a meta PDU session establishment request sent by a terminal, where the PDU session establishment request carries information of a requested network;

a processing unit 1502, configured to determine whether a network indicated by the information of the requested network supports a local area network service; and under the condition that the network indicated by the information of the requested network supports the local area network service, acquiring the SMF identifier for managing the PDU session according to the association relation between the SMF identifier and the network information and the information of the requested network.

Furthermore, the receiving unit 1501 is further configured to: and acquiring the subscription data of the terminal from the UDM network element, wherein the subscription data of the terminal comprises an association relation.

Specifically, when acquiring the subscription data of the terminal from the UDM network element, the receiving unit 1501 is specifically configured to: and in the registration process of the terminal, acquiring the subscription data of the terminal from the UDM network element.

Optionally, the receiving unit 1501 is specifically configured to, when the UDM network element acquires subscription data of the terminal: and in the process of notifying the update of the subscription document of the terminal, acquiring the subscription data of the terminal from the UDM network element.

In one implementation, the information of the requested network includes first indication information of whether the network indicated by the information of the requested network supports local area network services; when determining whether the network indicated by the requested network information supports the local area network service, the processing unit 1502 is specifically configured to: and determining whether the network indicated by the information of the requested network supports the local area network service according to the first indication information.

In another implementation, when determining whether the network indicated by the information of the requested network supports the local area network service, the processing unit 1502 is specifically configured to: determining whether the network indicated by the requested network information supports local area network service according to the local configuration information; or, according to the subscription data of the terminal, determining whether the network indicated by the information of the requested network supports the local area network service; or, the PDU session establishment request further includes second indication information that the network indicated by the information of the requested network supports the local area network service, and the network indicated by the information of the requested network supports the local area network service is determined according to the second indication information.

Based on the same inventive concept, the embodiment of the present application further provides a local area network communication device, which can be used to execute the function of the UDM network element in the method shown in the first embodiment. Referring to fig. 16, the lan communication apparatus 1600 includes a receiving unit 1601 and a processing unit 1602.

A receiving unit 1601, configured to receive a data update request sent by an OAM entity or an NEF network element, where the data update request includes a LAN configuration parameter, and the LAN configuration parameter includes an identifier of a LAN, information of a network corresponding to the LAN, and a member list corresponding to the LAN;

a processing unit 1602, configured to store an association relationship between the SMF identifier and information of a network corresponding to the LAN in subscription data of a terminal indicated by a member list corresponding to the LAN; the SMF network element corresponding to the SMF identifier is used for managing the PDU session of the terminal indicated by the member list corresponding to the LAN.

The information of the network corresponding to the LAN comprises DNN; alternatively, DNN and S-NSSAI.

In addition, the data updating request also comprises an SMF identification.

Further, the NEF network element obtains the SMF identifier through the NRF network element.

Furthermore, the apparatus 1600 further comprises: and the sending unit is used for sending a subscription data update notification to the AMF network element, wherein the subscription data update notification comprises an association relation.

Based on the same inventive concept, the embodiment of the present application further provides a local area network communication device, which can be used to execute the function of the NRF network element in the method shown in the second embodiment. Referring to fig. 17, the lan communication apparatus 1700 includes a receiving unit 1701, a processing unit 1702, and a transmitting unit 1703.

A receiving unit 1701, configured to receive an SMF query request message sent by an AMF network element, where the SMF query request message is used to request to acquire an SMF identifier for managing a PDU session requested to be established by a terminal, and the SMF query request message carries information of a requested network;

a processing unit 1702, configured to determine whether a network indicated by the information of the requested network supports local area network services; under the condition that the network indicated by the information of the requested network supports the local area network service, acquiring an SMF identifier for managing the PDU session requested to be established by the terminal according to the association relation between the SMF identifier and the network information and the information of the requested network;

a sending unit 1703, configured to send an SMF query response message to the AMF network element, where 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; alternatively, DNN and S-NSSAI.

Further, the receiving unit 1701 is also configured to: before receiving an SMF query request message sent by an AMF network element, receiving LAN configuration parameters sent by a NEF network element or an OAM entity, wherein the LAN configuration parameters comprise information of a network corresponding to the LAN; the processing unit 1702 is further configured to: selecting an SMF for session management for the LAN; and associating and storing the information of the SMF selected by the NRF and the network corresponding to the LAN to obtain an association relation.

Optionally, the receiving unit 1701 is further configured to: and acquiring LAN configuration parameters and SMF identifications sent by the NEF network elements or the OAM entities, wherein the LAN configuration parameters comprise information of networks corresponding to the LANs. An association of the SMF identification with information of the network corresponding to the LAN can thus be established.

In a possible implementation manner, the information of the requested network includes first indication information whether the network indicated by the information of the requested network supports the local area network service; when determining whether the network indicated by the information of the requested network supports the local area network service, the processing unit 1702 is specifically configured to: and determining whether the network indicated by the information of the requested network supports the local area network service according to the first indication information.

In another possible implementation manner, when determining whether the network indicated by the information of the requested network supports the local area network service, the processing unit 1702 is specifically configured to:

and determining whether the network indicated by the information of the requested network supports the local area network service according to the local configuration information.

Based on the same inventive concept, the embodiment of the present application further provides a local area network communication device, which can be used to execute the function of the AMF network element in the method shown in the third embodiment. Referring to fig. 18, the lan communication apparatus 1800 includes a receiving unit 1801, a processing unit 1802, and a transmitting unit 1803.

A receiving unit 1801, configured to receive a PDU session establishment request sent by a terminal, where the PDU session establishment request carries information of a requested network.

A processing unit 1802 configured to determine whether a network indicated by the information of the requested network supports local area network services.

A sending unit 1803, configured to send, to an NRF network element, an SMF query request message when a network indicated by the information of the requested network supports the local area network service, where the SMF query request message carries the information of the requested network and LAN indication information, and the LAN indication information is used to indicate that the network indicated by the information of the requested network supports the local area network service.

The receiving unit 1801 is further configured to receive an SMF query response message sent by the NRF network element, where the SMF query response message includes an SMF identifier for managing a PDU session requested to be established by the terminal.

Wherein the information of the requested network may include the DNN; alternatively, DNN and S-NSSAI.

In a possible implementation manner, the information of the requested network includes first indication information whether the network indicated by the information of the requested network supports the local area network service; when determining whether the network indicated by the requested network information supports the local area network service, the processing unit 1802 is specifically configured to: and determining whether the network indicated by the information of the requested network supports the local area network service according to the first indication information.

In another possible implementation manner, when determining whether the network indicated by the information of the requested network supports the local area network service, the processing unit 1802 is specifically configured to: determining whether the network indicated by the requested network information supports local area network service according to the local configuration information; or, according to the subscription data of the terminal, determining whether the network indicated by the information of the requested network supports the local area network service; or, the PDU session establishment request further includes second indication information that the network indicated by the information of the requested network supports the local area network service, and the network indicated by the information of the requested network supports the local area network service is determined according to the second indication information.

Based on the same inventive concept, the embodiment of the present application further provides a local area network communication device, which can be used to execute the function of the NRFF network element in the method shown in the third embodiment. Referring to fig. 19, the lan communication apparatus 1900 includes a receiving unit 1901, a processing unit 1902, and a transmitting unit 1903.

A receiving unit 1901, configured to receive an SMF query request message sent by an AMF network element, where the SMF query request message is used to request to acquire an SMF identifier for managing a PDU session requested to be established by a terminal, and the SMF query request message carries information of a requested network and LAN indication information, and the LAN indication information is used to indicate that a network indicated by the information of the requested network supports a local area network service;

a processing unit 1902, configured to determine, according to the LAN indication information, to obtain an SMF identifier corresponding to the requested network information from an association relationship between the SMF identifier and the network information;

a sending unit 1902, configured to send an SMF query response message to the AMF network element, where the SMF query response message carries the obtained SMF identifier.

Optionally, the receiving unit 1901 is further configured to: before receiving an SMF query request message sent by an AMF network element, receiving LAN configuration parameters sent by a NEF network element or an OAM entity, wherein the LAN configuration parameters comprise information of a network corresponding to the LAN; the processing unit 1902 is further configured to: selecting an SMF for session management for the LAN; and associating and storing the information of the SMF selected by the NRF and the network corresponding to the LAN to obtain an association relation.

The division of the units in the embodiments of the present application is schematic, and only one logic function division is used, and there may be another division manner in actual implementation, and in addition, each functional unit in each embodiment of the present application may be integrated in one processor, may also exist alone physically, or may also be integrated in one module by two or more units. The integrated unit can be realized in a form of hardware or a form of a software functional module.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a terminal device (which may be a personal computer, a mobile phone, or a network device) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

In the embodiments of the present application, the AMF network element, the UDM network element, and the NRF network element may all be presented in a form of dividing each functional module in an integrated manner. A "module" herein may refer to a particular ASIC, a circuit, a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other device that provides the described functionality.

In a simple embodiment, it is conceivable for those skilled in the art that the AMF network element, the UDM network element, and the NRF network element may all take the form shown in fig. 20.

The lan communication device 2000 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 a random access memory; the memory may also be a non-volatile memory such as, but not limited to, a read-only memory, a flash memory, a Hard Disk Drive (HDD) or solid-state drive (SSD), or the memory 2002 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory 2002 may be a combination of the above.

The embodiment of the present application does not limit a specific connection medium between the processor 2001 and the memory 2002. In the embodiment of the present application, the memory 2002 and the processor 2001 are connected by a bus 2004, the bus 2004 is represented by a thick line in the figure, and the connection manner between other components is only schematically illustrated and is not limited. The bus 2004 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 20, but this is not intended to represent only one bus or type of bus.

The processor 2001 may have a data transceiving function and may be capable of communicating with other devices, and in the apparatus shown in fig. 20, a separate data transceiving module, such as the communication interface 2003, may be provided for transceiving data; the processor 2001 can perform data transmission through the communication interface 2003 when communicating with other devices.

When the AMF network element takes the form shown in fig. 20, the processor 2001 in fig. 20 may execute the instructions by calling a computer stored in the memory 2002, so that the AMF network element may perform the method performed by the AMF network element in any one of the above method embodiments.

Specifically, the functions/implementation procedures of the sending unit, the receiving unit, and the processing unit in fig. 15 can be implemented by the processor 2001 in fig. 20 calling a computer executing instruction stored in the memory 2002. Alternatively, the function/implementation procedure of the processing unit in fig. 15 may be implemented by the processor 2001 in fig. 20 calling a computer-executable instruction stored in the memory 2002, and the function/implementation procedures of the transmitting unit and the receiving unit in fig. 15 may be implemented by the communication interface 2003 in fig. 20.

Specifically, the functions/implementation procedures of the sending unit, the receiving unit, and the processing unit in fig. 18 can be implemented by the processor 2001 in fig. 20 calling a computer executing instruction stored in the memory 2002. Alternatively, the function/implementation procedure of the processing unit in fig. 18 may be realized by the processor 2001 in fig. 20 calling a computer-executable instruction stored in the memory 2002, and the function/implementation procedures of the transmitting unit and the receiving unit in fig. 18 may be realized by the communication interface 2003 in fig. 20.

When the UDM network element takes the form shown in fig. 20, the processor 2001 in fig. 20 may make the UDM network element perform the method performed by the UDM network element in any of the above-described method embodiments by calling a computer stored in the memory 2002 to execute the instructions.

Specifically, the functions/implementation procedures of the sending unit, the receiving unit, and the processing unit in fig. 16 can be implemented by the processor 2001 in fig. 20 calling a computer executing instruction stored in the memory 2002. Alternatively, the function/implementation procedure of the processing unit in fig. 16 may be implemented by the processor 2001 in fig. 20 calling a computer-executable instruction stored in the memory 2002, and the function/implementation procedures of the transmitting unit and the receiving unit in fig. 16 may be implemented by the communication interface 2003 in fig. 20.

When the NRF network element takes the form shown in fig. 20, the processor 2001 in fig. 20 may make the NRF network element perform the method performed by the NRF network element in any of the above method embodiments by calling a computer stored in the memory 2002 to execute the instructions.

Specifically, the functions/implementation procedures of the receiving unit, the sending unit, and the processing unit in fig. 17 may all be implemented by the processor 2001 in fig. 20 calling a computer execution instruction stored in the memory 2002. Alternatively, the function/implementation procedure 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 procedure of the receiving unit and the sending unit in fig. 17 may be implemented by the communication interface 2003 in fig. 20.

Specifically, the functions/implementation procedures of the receiving unit, the sending unit, and the processing unit in fig. 19 may all be implemented by the processor 2001 in fig. 20 calling a computer execution instruction stored in the memory 2002. Alternatively, the function/implementation procedure of the processing unit in fig. 19 may be implemented by the processor 2001 in fig. 20 calling a computer execution instruction stored in the memory 2002, and the function/implementation procedure of the receiving unit and the sending unit in fig. 19 may be implemented by the communication interface 2003 in fig. 20.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

Claims

1. A local area network communication method, comprising:

an access and mobility management function AMF network element receives a Protocol Data Unit (PDU) session establishment request sent by a terminal, wherein the PDU session establishment request carries information of a requested network;

the AMF network element determines whether the network indicated by the requested network information supports local area network service;

and under the condition that the network indicated by the requested network information supports the local area network service, the AMF network element acquires the SMF identifier for managing the PDU session according to the incidence relation between the session management function SMF identifier and the network information and the requested network information.

2. The method of claim 1, wherein the method further comprises:

and the AMF network element acquires the subscription data of the terminal from a Unified Data Management (UDM) network element, wherein the subscription data of the terminal comprises the association relation.

3. The method of claim 2, wherein the AMF network element obtains the subscription data of the terminal from a unified data management UDM network element, specifically:

and the AMF network element acquires the subscription data of the terminal from the Unified Data Management (UDM) network element in the registration process of the terminal.

4. The method of claim 2, wherein the AMF network element obtains the subscription data of the terminal from a unified data management UDM network element, specifically:

the UDM network element receives a data updating request from a network open function (NEF) network element or an operation, maintenance and management (OAM) entity, wherein the data updating request comprises a LAN configuration parameter and an SMF identifier, and the LAN configuration parameter comprises the identifier of the LAN, information of a network corresponding to the LAN and a member list corresponding to the LAN;

the UDM network element stores the association relation between the SMF identification and the information of the network corresponding to the LAN into the signing data of the terminal;

the UDM network element sends the association relation to the AMF network element;

and the AMF network element receives the association relation.

5. The method according to any of claims 1-4, wherein the information of the requested network comprises first indication information whether the network it indicates supports local area network services; the determining, by the AMF network element, whether the network indicated by the information of the requested network supports a local area network service includes:

and the AMF network element determines whether the network indicated by the requested network information supports local area network services or not according to the first indication information.

6. The method of any of claims 1-4, wherein the determining, by the AMF network element, whether the network indicated by the information of the requested network supports local area network services comprises:

the AMF network element determines whether the network indicated by the requested network information supports local area network service according to local configuration information; alternatively, the first and second electrodes may be,

the AMF network element determines whether the network indicated by the requested network information supports local area network service according to the subscription data of the terminal; alternatively, the first and second electrodes may be,

the PDU session establishment request further comprises second indication information of the local area network service supported by the network indicated by the requested network information, and the AMF network element determines that the local area network service supported by the network indicated by the requested network information according to the second indication information.

7. The method according to any of claims 1-4, wherein the information of the requested network comprises a data network name, DNN; alternatively, the first and second electrodes may be,

DNN and single network slice selection assistance information S-NSSAI.

8. A local area network communication method, comprising:

the method comprises the steps that a UDM network element receives a data updating request sent by an operation, maintenance and management (OAM) entity or a network open function (NEF) network element, wherein the data updating request comprises a LAN configuration parameter, and the LAN configuration parameter comprises an identifier of a LAN, information of a network corresponding to the LAN and a member list corresponding to the LAN;

the UDM network element stores the association relationship between the SMF identification and the information of the network corresponding to the LAN into the subscription 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 for managing a PDU session of the terminal indicated by the member list corresponding to the LAN.

9. The method of claim 8, wherein the SMF identification is further included in the data update request.

10. The method of claim 9, wherein the method further comprises:

and the NEF network element acquires the SMF identifier through a network function repository function NRF network element.

11. The method of any of claims 8-10, further comprising:

and the UDM network element sends a subscription data update notification to the AMF network element, wherein the subscription data update notification comprises the association relation.

12. The method of any of claims 8-10, wherein the information for the network to which the LAN corresponds includes DNN; alternatively, the first and second electrodes may be,

DNN and S-NSSAI.

13. A local area network communication device, comprising:

a receiving unit, configured to receive a protocol data unit PDU session establishment request sent by a terminal, where the PDU session establishment request carries information of a requested network;

a processing unit, configured to determine whether a network indicated by the information of the requested network supports a local area network service; and under the condition that the network indicated by the information of the requested network supports the local area network service, acquiring the SMF identifier for managing the PDU session according to the association relation between the SMF identifier and the network information and the information of the requested network.

14. The apparatus of claim 13, wherein the receiving unit is further configured to:

and acquiring the subscription data of the terminal from the UDM network element, wherein the subscription data of the terminal comprises the association relation.

15. The apparatus of claim 14, wherein the receiving unit, when acquiring the subscription data of the terminal from the legacy UDM network element, is specifically configured to:

and acquiring the subscription data of the terminal from the UDM network element in the registration process of the terminal.

16. The apparatus of claim 14, wherein the receiving unit, when obtaining the subscription data of the terminal from the UDM network element, is specifically configured to:

and acquiring the subscription data of the terminal from the UDM network element in the subscription document updating notification process of the terminal.

17. The apparatus according to any of claims 13-16, wherein the information of the requested network comprises first indication information whether the network it indicates supports local area network services; when determining whether the network indicated by the requested network information supports the local area network service, the processing unit is specifically configured to:

and determining whether the network indicated by the information of the requested network supports local area network service or not according to the first indication information.

18. The apparatus according to any one of claims 13 to 16, wherein the processing unit, when determining whether the network indicated by the information of the requested network supports the local area network service, is specifically configured to:

determining whether the network indicated by the information of the requested network supports local area network service or not according to local configuration information; alternatively, the first and second electrodes may be,

determining whether the network indicated by the information of the requested network supports local area network service or not according to the subscription data of the terminal; alternatively, the first and second electrodes may be,

the PDU session establishment request also comprises second indication information of the local area network service supported by the network indicated by the requested network information, and the local area network service supported by the network indicated by the requested network information is determined according to the second indication information.

19. The apparatus of any of claims 13-16, wherein the information of the requested network comprises a data network name, DNN; alternatively, DNN and S-NSSAI.

20. A local area network communication device, comprising:

a receiving unit, configured to receive a data update request sent by an OAM entity or an NEF network element, where the data update request includes LAN configuration parameters, and the LAN configuration parameters include an identifier of a LAN, information of a network corresponding to the LAN, and a member list corresponding to the LAN;

the processing unit is used for storing the association relationship between the SMF identification and the information of the network corresponding to the LAN into the subscription 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 for managing a PDU session of the terminal indicated by the member list corresponding to the LAN.

21. The apparatus of claim 20, wherein the SMF identification is further included in the data update request.

22. The apparatus of claim 21, wherein the NEF network element obtains the SMF identity through an NRF network element.

23. The apparatus of any of claims 20-22, wherein the apparatus further comprises:

and the sending module is used for sending a subscription data update notification to the AMF network element, wherein the subscription data update notification comprises the association relation.

24. The apparatus of any of claims 20-22, wherein the information for the network to which the LAN corresponds comprises a DNN; alternatively, DNN and S-NSSAI.

25. A local area network communication system is characterized by comprising an AMF network element and an UDM network element;

the UDM network element is used for

Receiving a data updating request sent by an OAM entity or a NEF network element, wherein the data updating request comprises LAN configuration parameters, and the LAN configuration parameters comprise an identifier of a LAN, information of a network corresponding to the LAN and a member list corresponding to the LAN;

storing the association relationship between the SMF identification and the information of the network corresponding to the LAN into the subscription data of the terminal indicated by the member list corresponding to the LAN; the SMF network element corresponding to the SMF identifier is used for managing a PDU session of a terminal indicated by the member list corresponding to the LAN;

sending the association relation to the AMF network element;

the AMF network element is used for

Receiving the association relationship from the UDM network element;

receiving a PDU session establishment request sent by a first terminal, wherein the PDU session establishment request carries information of a requested network, and the first terminal is any one of terminals indicated by a member list corresponding to the LAN;

determining whether a network indicated by the information of the requested network supports local area network services;

and under the condition that the network indicated by the information of the requested network supports the local area network service, acquiring the SMF identifier for managing the PDU session requested to be established by the first terminal according to the association relation and the information of the requested network.

26. The system of claim 25, further comprising an AF network element and the NEF network element:

the AF network element is configured to send a LAN management request to the NEF network element, where the LAN management request carries the LAN configuration parameters;

the NEF network element is used for receiving the LAN management request; and sending the data updating request to the UDM network element.

27. The system of claim 25, wherein the data update request further includes an SMF flag that manages a PDU session for the terminal indicated by the member list corresponding to the LAN.

28. The system of claim 27, wherein the NEF network element is further configured to:

and acquiring an SMF identifier for managing the PDU session of the terminal indicated by the member list corresponding to the LAN through the NRF network element.

29. The system according to any of claims 25-28, wherein the information of the requested network comprises first indication information whether the network it indicates supports local area network services; when determining whether the network indicated by the requested network information supports the local area network service, the AMF network element is specifically configured to:

30. The system according to any one of claims 25 to 28, wherein the AMF network element, when determining whether the network indicated by the information of the requested network supports the local area network service, is specifically configured to:

the PDU session establishment request also comprises second indication information of the local area network service supported by the network indicated by the information of the requested network; and determining that the network indicated by the information of the requested network supports local area network service according to the second indication information.

31. The system of any of claims 25-28, wherein the information of the network to which the LAN corresponds or the information of the requested network comprises a DNN; alternatively, DNN and S-NSSAI.