Method and apparatus for establishing a mobile communication local area network

Abstract

The embodiment of the application discloses a mobile communication LAN establishment method and device, and the method comprises the following steps: a gateway sends first information when a first user plane network unit or the gateway is disconnected with a core network, wherein the first information is used for indicating to establish a local area network among at least two first user terminals (UEs), and the first UEs are UEs served by the first user plane network unit or the gateway. In the application, the gateway establishes the local area network among the first UEs by sending the first information after being disconnected with the core network, so that the local area network service of the first UEs is ensured to be normal when being disconnected with the core network.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication technology, in particular to a mobile communication local area network establishment method and device. BACKGROUND

[0002] 5G LAN is one of the most marketable technologies in the related stages of 3GPP, which can provide customized 5G industry LAN for partners, so that enterprise terminals and enterprise clouds are in the same "local area network". It mainly faces the fields of enterprise cloud access and intelligent manufacturing, and realizes flexible group management, direct communication and access to enterprise clouds at any time and anywhere. In the 5G LAN technology, the concept of virtual network group (VN group) is introduced in the 5G network, and users in the same "local area network" belong to a group. All users in a 5G LAN VN group are served by one or more user plane functions (UPF) and one session management function (SMF) or a group of session management network elements. Users can transfer data of the data local area network to the target UE without passing through the data network (DN) through the user plane network element. The session management network element can configure the user plane network element to realize different service forwarding, such as local area network services under the protocol data unit (PDU) session anchor (PSA) user plane network element, which are directly forwarded through the PSA user plane network element, cross-PSA local area network services are forwarded through N19 tunnel, and services to the data network (DN) are forwarded through N6 port. The VN group of the current 5G LAN is managed and configured by the core network, and once disconnected from the core network, the 5G LAN is invalid. SUMMARY

[0003] The embodiments of the present application provide a mobile communication local area network establishment method and device, which can ensure normal local area network service when disconnected from the core network.

[0004] In a first aspect, the embodiments of the present application provide a mobile communication local area network establishment method applied to a gateway, and the method comprises the following steps:

[0005] When the first user plane network element or the gateway is disconnected from the core network, the gateway sends first information, and the first information is used to indicate to establish a local area network between at least two first user terminals (UEs), and the first UE is a UE served by the first user plane network element or the gateway.

[0006] In a second aspect, the embodiments of the present application provide a mobile communication local area network establishment method, applied to a first user plane network element, and the method comprises:

[0007] The first user plane network element receives first information, and the first information is used to indicate establishment of a local area network between at least two first UEs, the first UEs being UEs served by the first user plane network element.

[0008] According to the first information, the first user plane network element is determined as a first protocol data unit session anchor point.

[0009] In a third aspect, the embodiments of the present application provide a mobile communication local area network establishment method, applied to a session management network element, and the method comprises

[0010] The session management network element sends first information to a first user plane network element, and the first information is used to indicate establishment of a local area network between at least two first UEs, the first UEs being UEs served by the first user plane network element.

[0011] In a fourth aspect, the embodiments of the present application provide a mobile communication local area network establishment device, applied to a gateway, and the device comprises:

[0012] A transceiver unit is configured to send first information when a first user plane network element or the gateway is disconnected from a core network, and the first information is used to indicate establishment of a local area network between at least two first user terminals (UEs), the first UEs being UEs served by the first user plane network element or the gateway.

[0013] In a fifth aspect, the embodiments of the present application provide a mobile communication local area network establishment device, applied to a first user plane network element, and the device comprises:

[0014] A transceiver unit is configured to receive first information, and the first information is used to indicate establishment of a local area network between at least two first UEs, the first UEs being UEs served by the first user plane network element.

[0015] A processing unit is configured to determine, according to the first information, the first user plane network element as a first protocol data unit session anchor point.

[0016] In a sixth aspect, the embodiments of the present application provide a mobile communication local area network establishment device, applied to a session management network element, and the device comprises:

[0017] A transceiver unit is configured to send first information to a first user plane network element, and the first information is used to indicate establishment of a local area network between at least two first UEs, the first UEs being UEs served by the first user plane network element.

[0018] In a seventh aspect, an embodiment of the present application provides a chip, configured to send first information when a first user plane network element or the gateway is disconnected from a core network, the first information being used to indicate establishment of a local area network between at least two first user equipment (UE), the first UE being a UE served by the first user plane network element or the gateway.

[0019] In an eighth aspect, an embodiment of the present application provides a chip module, comprising a transceiver assembly and a chip, wherein the chip is configured to send first information when a first user plane network element or the gateway is disconnected from a core network through the transceiver assembly, the first information being used to indicate establishment of a local area network between at least two first user equipment (UE), the first UE being a UE served by the first user plane network element or the gateway.

[0020] In a ninth aspect, an embodiment of the present application provides a chip, configured to receive first information, the first information being used to indicate establishment of a local area network between at least two first user equipment (UE), the first UE being a UE served by the first user plane network element.

[0021] The chip is further configured to determine, according to the first information, that the first user plane network element is a first protocol data unit session anchor point.

[0022] In a tenth aspect, an embodiment of the present application provides a chip module, comprising a transceiver assembly and a chip, wherein the chip is configured to receive first information through the transceiver assembly, the first information being used to indicate establishment of a local area network between at least two first user equipment (UE), the first UE being a UE served by the first user plane network element.

[0023] The chip is configured to determine, according to the first information, that the first user plane network element is a first protocol data unit session anchor point.

[0024] In an eleventh aspect, an embodiment of the present application provides a chip, configured to send first information to a first user plane network element, the first information being used to indicate establishment of a local area network between at least two first user equipment (UE), the first UE being a UE served by the first user plane network element.

[0025] In a twelfth aspect, an embodiment of the present application provides a chip module, comprising a transceiver assembly and a chip, wherein the chip is configured to send first information to a first user plane network element through the transceiver assembly, the first information being used to indicate establishment of a local area network between at least two first user equipment (UE), the first UE being a UE served by the first user plane network element.

[0026] In a thirteenth aspect, an electronic device is provided, and the electronic device includes a processor, a memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the program including instructions for performing some or all of the steps described in the method of any one of the first aspect, the second aspect, or the third aspect.

[0027] In a fourteenth aspect, a computer-readable storage medium is provided, and the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program causes a computer to perform some or all of the steps described in the method of any one of the first aspect, the second aspect, or the third aspect.

[0028] In a fifteenth aspect, a computer program product is provided, and the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to perform some or all of the steps described in the method of any one of the first aspect, the second aspect, or the third aspect. The computer program product can be a software installation package.

[0029] The technical solution provided in the present application is that the gateway sends first information when the first user plane network element or the gateway is disconnected from the core network, and the first information is used to indicate that a local area network between at least two first user terminals (UEs) is established, where the first UEs are UEs served by the first user plane network element. In the present application, the gateway establishes the local area network between the first UEs by sending the first information after being disconnected from the core network, so that the local area network service of the first UEs is ensured to be normal when being disconnected from the core network. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0031] Figure 1a is a local area network network diagram provided by an embodiment of the present application based on local conversion and N19 tunnel conversion;

[0032] Figure 1b is a diagram of disconnection from the core network provided by an embodiment of the present application;

[0033] Figure 2FIG. 1 is a flow diagram of a method for establishing a mobile communication LAN according to an embodiment of the present application;

[0034] Figure 2a FIG. 2 is a network diagram of a LAN according to an embodiment of the present application;

[0035] Figure 3 FIG. 3 is a flow diagram of another method for establishing a mobile communication LAN according to an embodiment of the present application;

[0036] Figure 3a FIG. 4 is another network diagram of a LAN according to an embodiment of the present application;

[0037] Figure 4 FIG. 5 is a flow diagram of another method for establishing a mobile communication LAN according to an embodiment of the present application;

[0038] Figure 4a FIG. 6 is another network diagram of a LAN according to an embodiment of the present application;

[0039] Figure 5 FIG. 7 is a function unit component block diagram of another mobile communication LAN establishment device according to an embodiment of the present application;

[0040] Figure 6 FIG. 8 is a structure diagram of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0041] The embodiments of the present application will be described below with reference to the drawings.

[0042] The technical solutions of the embodiments of the present application can be applied to a Global System for Mobile Communication (CSM), a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a Worldwide Interoperability for Microwave Access (Wi-MAX) system, a Long Term Evolution (LTE) system, a 5G communication system (for example, a New Radio (NR)), a communication system integrating multiple communication technologies (for example, a communication system integrating LTE technology and NR technology), or a new communication system in the future, such as a 6G communication system or a 7G communication system, and the embodiments of the present application are not limited thereto. The technical solutions of the embodiments of the present application are also applicable to different network architectures, including but not limited to a relay network architecture, a dual-link architecture, a Vehicle-to-Everything (V2X) architecture, and the like.

[0043] The user equipment provided by the embodiments of the present application can be a mobile phone, a tablet computer, a notebook computer, an Ultra-Mobile Personal Computer (UMPC), a netbook, a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a wearable device, or a vehicle-mounted device, and the like.

[0044] A user terminal (User Equipment, UE) is connected to a 5G core network through an access network, and is connected to other nodes of the 5G core network, such as a Session Management Function (SMF) node, through an Access Mobility Management (AMF) node of the 5G core network. A Protocol Data Unit (PDU) session is established through a User Plane Function (UPF) node to realize transmission of data with a Digital Network (DN). One PDU session can be connected to a data network through one or more UPF nodes through different N6 interfaces, and the UPF node corresponding to the N6 interface plays the role of a PDU Session Anchor (PSA).

[0045] According to the current research progress of 3GPP in indoor enhancement, indoor users can access the operator network through PRAS and eRG, and indoor devices can establish local area network communication based on 5G (i.e. terminal-to-terminal communication without passing through a third-party data network). The current 5GLAN is established based on the core network of the operator, and the nodes of convergence and routing are on the UPF of the core network, as shown in Figure 1a The SMF can configure the UPF to implement different service forwarding. For example, the local area network services of UE1 and UE2 under the same PSA UPF are directly forwarded locally through the PSA UPF, the local area network services of UE3 and UE4 across the PSA are forwarded through the N19 tunnel, and the services to the data network (DN) are forwarded outward through the N6 port. However, when the home or enterprise gateway is disconnected from the core network, as shown in Figure 1b Although the local area network devices based on 5GLAN are in the same gateway and the same virtual network group, the local area network service cannot be provided between the UEs in the same virtual network group, which causes loss and inconvenience to users.

[0046] In the embodiments of the present application, when the user plane network element is disconnected from the core network, i.e. the gateway is disconnected from the core network, the gateway can construct a local area network between the UEs belonging to the same virtual network group through the gateway by sending first information, so as to ensure the normal local area network service between the UEs when disconnected from the core network.

[0047] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0048] In specific implementations, the 5G network described in the embodiments of the present application refers to a network with a 5G core network. The access network (Access Network, AN) described in the embodiments of the present application can be at least one of the following access networks: an access network based on Long Term Evolution (Long Term Evolution, LTE) technology, an access network based on 5G air interface technology, and a non-3GPP access network connected to the 5G core network. The user terminal signaling is connected to the 5G core network through the access network, connected to other nodes of the 5G core network through the AMF node of the 5G core network, such as the SMF node, and the data is connected to the UPF of the 5G core network through the access network, and then connected to the data network (DN) through the UPF.

[0049] In the embodiment of the application, the gateway can be a 5G home gateway 5G-RG, an evolved home gateway eRG, a 5G enterprise gateway, etc., which can realize data communication between UEs in the same virtual network group and connection with an external network (Internet), and provide functions such as bridging / routing, protocol conversion, address management and conversion, QoS management, etc. Of course, other gateways that can realize the same functions are also applicable to the application.

[0050] Exemplarily, the user plane network element in the embodiment of the application can be a UPF in a 5G system, which is responsible for functions such as routing and forwarding of user data packets, service identification and policy execution; or can be other network elements with UPF functions, such as a core network (Evolved Packet Core, EPC) control and user plane separation (Control and User Plane Separation, CUPS) in a 4G system. Of course, network elements that can realize the same functions in other standards are also applicable to the application, that is, the application does not limit the specific implementation of the user plane network element.

[0051] Exemplarily, the session management network element in the embodiment of the application can be a SMF in a 5G system, which is responsible for functions such as life cycle management of a 5G user session, Internet Protocol (Internet Protocol, IP) address allocation, data routing selection, service continuity management, policy rule matching, and traffic billing processing; or can be other network elements with SMF functions, such as a mobility management entity (Mobility Management Entity, MME) in a 4G system, a serving gateway (Serving Gateway, SGW), a packet data network gateway (Packet Data Network Gateway, PGW) session management, etc. The functions of the control plane. Of course, network elements that can realize the same functions in other standards are also applicable to the application, that is, the application does not limit the specific implementation of the session management network element.

[0052] Referring to Figure 2 , Figure 2 A mobile communication local area network establishment method flow chart provided by the embodiment of the application. As Figure 2 shown, the method comprises the following steps.

[0053] S210, when the gateway is disconnected from the core network, the gateway sends first information, the first information is used to indicate to establish a local area network between at least two first user terminals UE, the first UE is a UE served by the gateway.

[0054] The at least two first UEs belong to the same virtual network group, and the at least two first UEs are connected to a gateway, and are connected to a first user plane network unit through the gateway, and are connected to a core network. When the gateway is disconnected from the core network, the gateway acts as an SMF, and establishes a local area network between the at least two first user terminals UE by sending first information. As shown in Figure 2a The UEs 1, 2, 3, 4, 5 and 6 belong to the same virtual network group, and the UEs 3, 4, 5 and 6 are connected to the core network through the gateway eRG. When the gateway is disconnected from the core network, the gateway establishes a local area network between the UEs 3, 4, 5 and 6 by sending first information.

[0055] It should be noted that the gateway in the embodiments of the present application can be connected to a UPF in the core network, and the UPF acts as an I-UPF or PSA UPF in a PDU session between the first UE and the DN.

[0056] In the present application, the gateway has a configuration function of wired network local area network or wireless local area network, and the first UE also supports the corresponding local area network configuration. That is, when at least two first UEs access the gateway using wired network, the gateway configures the wired local area network to build a local area network between the at least two first UEs, which has the same authority as the original 5G local area network, and the members of the local area network are the UEs accessed through the same eRG in the virtual network group corresponding to the original 5G local area network; when at least two first UEs access the gateway using wireless network, the gateway configures the wireless local area network to build a local area network between the at least two first UEs, which has the same authority as the original 5G local area network, and the members of the local area network are the UEs accessed through the same eRG in the virtual network group corresponding to the original 5G local area network.

[0057] Optionally, the first UE connects to the gateway using non-3GPP access technology.

[0058] Specifically, when the first UE accesses the gateway using non-3GPP technology, for example, a user goes from outdoor to indoor, so that the first UE is handed over from an outdoor macro base station to a customer premises network (CPN) composed of eRG and PRAS, the first UE supports 3GPP access technology and non-3GPP access technology at the same time, but at this time the first UE is disconnected from the core network, so that the 5G local area network formed by the first UE through 3GPP access cannot work normally, the first UE accesses the gateway using non-3GPP access technology, at this time the gateway configures the wireless local area network to build a local area network between the at least two first UEs, which has the same authority as the original 5G local area network, and the members of the local area network are the UEs accessed through the same eRG in the virtual network group corresponding to the original 5G local area network.

[0059] The first information includes virtual network group information. Each virtual network group includes the following parameters: PDU session type, data network name (DNN), single network slice selection assistance information (S-NSSAI), a list of generic public subscription identifiers (GPSI), and the like.

[0060] Optionally, the method further includes: when the gateway is connected to the core network, the gateway sends an authentication request to the AMF for user authentication; and the gateway receives the virtual network group information from the unified data management (UDR).

[0061] The unified data management (UDM) is responsible for 5G user subscription data management, user authentication data management, and user identification management. In order to establish a 5G local area network between the first UEs when the gateway is disconnected from the core network, the gateway can send an authentication request to the access and mobility management function (AMF) of the core network when the gateway is connected to the core network. The AMF authenticates the gateway based on user authentication. After successful authentication, the UDR can send the stored virtual network group information to the gateway based on user subscription, so that the gateway can establish a local area network based on the virtual network group information.

[0062] Optionally, the gateway sending the first information includes: the gateway sending the first information to the non-3GPP communication module.

[0063] Specifically, the at least two first UEs are connected to the gateway using non-3GPP access technology, so when the gateway is disconnected from the core network, the gateway sends the virtual network group information to its non-3GPP communication module, so that the non-3GPP communication module continues to use the previous virtual network group information to establish a local area network between the at least two first UEs, thereby realizing the connection between the first UEs. Specifically, after the gateway establishes a local area network based on the virtual network group information, it can broadcast the local area network name, the IP address and / or IP address network prefix assigned by the gateway to the at least two first UEs. After receiving the broadcast message, the first UE can access the local area network corresponding to the local area network name based on the assigned IP address and / or IP address network prefix.

[0064] In the embodiment of the present application, the virtual network group information includes a plurality of virtual network group identifiers and a GPSI list corresponding to each virtual network group. The GPSI list includes at least one GPSI and a mapping relationship between a user permanent identifier (SUPI) and the GPSI, wherein each GPSI can be associated with one SUPI.

[0065] Optionally, the method further includes: when the second UE is located in the service range of the gateway and requests to join the local area network, the gateway checks the GPSI of the second UE; and when the GPSI of the second UE belongs to the GPSI list, the gateway allows the second UE to join the local area network.

[0066] In a specific implementation, when the second UE (new UE) appears in the service range of the gateway and requests to join the local area network, the gateway needs to check the GPSI of the second UE. If the GPSI of the second UE is in the GPSI list in the virtual network group information issued by the UDR, it indicates that the second UE has passed the authentication of the core network and belongs to the same virtual network group as the first UE. Therefore, the gateway can allow the second UE to join the local area network.

[0067] It can be seen that the present application proposes a mobile communication local area network establishment method. When the first user plane network element is disconnected from the core network, the gateway sends first information, which is used to indicate the establishment of a local area network between at least two first user terminals (UEs). The first UE is a UE served by the first user plane network element. In the present application, the gateway establishes the local area network between the first UEs by sending the first information after being disconnected from the core network, so as to ensure the normal service of the local area network of the first UEs when being disconnected from the core network.

[0068] Please refer to Figure 3 , Figure 3 A flowchart of a mobile communication local area network establishment method provided by the embodiment of the present application is shown in FIG. 1. As shown in FIG. 1, the method includes the following steps. Figure 3

[0069] S310, when the first user plane network element is disconnected from the core network, the gateway sends first information, which is used to indicate the establishment of a local area network between at least two first user terminals (UEs). The first UE is a UE served by the first user plane network element.

[0070] ​In the embodiment of the present application, a UPF, i.e., a first user plane network unit, is introduced in the gateway. It should be noted that the gateway and the first user plane network unit can be the same entity, i.e., some software code is added in the gateway, which can realize the function of the UPF; or the gateway and the first user plane network unit are two entities, the gateway connects the first user plane network unit, and the first user plane network unit connects the UPF in the core network. When the first user plane network unit is normally connected with the core network, the first user plane network unit acts as an I-UPF in the PDU session between the first UE and the DN; when the first user plane network unit is disconnected from the core network, the first user plane network unit acts as a PSA UPF to realize the local forwarding of the local area network service under the first user plane network unit.

[0071] The at least two first UEs belong to UEs in a same virtual network group, and the at least two first UEs are connected with the gateway and the first user plane network unit. When the first user plane network unit is disconnected from the core network, the gateway acts as a role of the SMF to establish the local area network between the at least two first user terminals UE by sending the first information. Figure 3a As shown in the figure, UE1, UE2, UE3, UE4, UE5 and UE6 belong to the same virtual network group, UE3, UE4, UE5 and UE6 are connected with the gateway eRG and the UPF in the gateway, the UPF in the gateway acts as an I-UPF of the local area network of UE3, UE4, UE5 and UE6, the I-UPF is connected with the core network PSA UPF through an N9 tunnel, the PSA UPF is connected with the PSA UPF of the virtual network group through an N19 tunnel, and the PSA UPF of the virtual network group is connected with the DN; UE1 and UE2 are connected with the PSA UPF of the virtual network group through the I-UPF in the core network, and when the I-UPF in the gateway is disconnected from the core network, the I-UPF in the gateway can be used as the PSA UPF to establish the local area network between UE3, UE4, UE5 and UE6.

[0072] The first information includes one or more of virtual network group information, an ID of a first PDU session, and a forwarding quality of service (QoS) rule of the first PDU session, and the first PDU session is established between the at least two first UEs and a data network (DN) through the first user plane network unit.

[0073] Optionally, the gateway sending the first information includes that the gateway sends the first information to the first user plane network unit.

[0074] Specifically, when the first user plane network element fails to connect the PSA UPF and the SMF, a UPF reselection process of the PDU session is triggered. Specifically, the gateway acts as an SMF role, initiates the UPF reselection process, selects the first user plane network element as the PSA UPF, and then sends first information to the first user plane network element, so that the first user plane network element receives the first information and performs local forwarding on the local area network service passing through the first user plane network element, and discards non-local area network services and performances, thereby establishing the local area network between the at least two first UEs.

[0075] Optionally, the method further comprises: when the first user plane network element connects the core network, the gateway receives second information from a session management network element, the second information comprising the first information and third information, the third information comprising an IP address of the first PDU session and / or an IP address network prefix of the first PDU session; and the gateway sends the third information to the first user plane network element.

[0076] When the at least two first UEs establish a PDU session (first PDU session) with a DN through the first user plane network element, for UEs belonging to the same virtual network group, the SMF determines that the UEs of the virtual network group need to establish a PDU session ID passing through the same I-UPF (first user plane network element), and configures the first user plane network element with first information and third information. Specifically, after the first user plane network element connects the core network and establishes the first PDU session, the SMF sends the configured first information and third information to the gateway, so that when the first user plane network element fails to connect the PSA UPF and the SMF, the gateway can trigger a UPF reselection process of the PDU session, and establish a local area network between the first UEs.

[0077] Further, after the gateway selects the first user plane network element as the PSA UPF, the gateway can send the IP address of the first PDU session and / or the IP address network prefix of the first PDU session configured by the SMF to the first user plane network element, so that the first user plane network element keeps the IP address and / or the IP address network prefix allocated to each PDU session unchanged, and uses the forwarding quality of service rule configured by the SMF to perform local forwarding on the local area network service.

[0078] S320, the first user plane network element receives the first information, and determines that the first user plane network element is a first protocol data unit session anchor point according to the first information.

[0079] In a specific implementation, after the first user plane network element receives the first information, the first user plane network element performs the function of the PSA UPF according to the first information. Correspondingly, the first user plane network element receives third information from the gateway, and the third information includes an IP address of the first PDU session and / or an IP address network prefix of the first PDU session. According to the first information and the third information, the first user plane network element keeps the IP address and / or the IP address network prefix allocated to each PDU session unchanged, and performs local forwarding of the local area network service using the forwarding quality of service rule configured by the SMF.

[0080] It can be seen that the present application proposes a mobile communication local area network establishment method. When the first user plane network element is disconnected from the core network, the gateway sends first information, which is used to indicate establishment of a local area network between at least two first user terminals (UEs), and the first UE is a UE served by the first user plane network element. The first user plane network element receives the first information and determines that the first user plane network element is a first protocol data unit session anchor point according to the first information. The present application introduces the first user plane network element in the gateway, so that when the first user plane network element is disconnected from the core network, the gateway can trigger a UPF reselection process of a PDU session, and the first user plane network element is taken as a PSA UPF by sending the first information, and the local area network service of the first UE is locally forwarded through the first user plane network element, so as to ensure normal local area network service of the first UE when disconnected from the core network.

[0081] Please refer to Figure 4 , Figure 4 A mobile communication local area network establishment method flow chart provided by an embodiment of the present application. As shown in Figure 4 , the method includes the following steps.

[0082] S410, the session management network element sends first information to the first user plane network element, and the first information is used to indicate establishment of a local area network between at least two first UEs, and the first UE is a UE served by the first user plane network element.

[0083] In the embodiment of the present application, a UPF, i.e., a first user plane network unit, is introduced in the gateway. It should be noted that the gateway and the first user plane network unit can be the same entity, i.e., some software code is added in the gateway, which can realize the function of the UPF; or the gateway and the first user plane network unit are two entities, the gateway connects the first user plane network unit, and the first user plane network unit connects the UPF in the core network. When the first user plane network unit is normally connected with the core network, the first user plane network unit acts as a PSA UPF in the PDU session between the first UE and the DN; when the first user plane network unit is disconnected from the core network, the first user plane network unit can directly realize the local forwarding of the local area network service.

[0084] The at least two first UEs belong to UEs in a same virtual network group, and the at least two first UEs are connected with the gateway and the first user plane network unit. The first user plane network unit is connected with the core network. When the first user plane network unit is disconnected from the core network, the first user plane network unit can continue to locally forward the service between the first UEs, and ensure that the local area network service of the first UEs is normal. As shown in Figure 4a The UEs 1, 2, 3, 4, 5 and 6 belong to the same virtual network group, the UEs 3, 4, 5 and 6 are connected with the gateway eRG and the UPF in the gateway, the UPF in the gateway acts as a PSA UPF of the local area network of the UEs 3, 4, 5 and 6, the PSA UPF is connected with the UPF in the core network through an N9 tunnel, the UPF also acts as a PSA UPF of the local area network of the UEs 3, 4, 5 and 6, the PSA UPF is connected with the PSA UPF of the virtual network group through an N19 tunnel, and the PSA UPF of the virtual network group is connected with the DN; the UEs 1 and 2 are connected with the PSA UPF of the virtual network group through the I-UPF in the core network, and the PSA UPF in the gateway can be used to establish the local area network between the UEs 3, 4, 5 and 6 when the PSA UPF in the gateway is disconnected from the PSA in the core network.

[0085] The first information includes one or more of virtual network group information, an ID of a first PDU session, and a forwarding quality of service (QoS) rule of the first PDU session. The first PDU session is established between the at least two first UEs and a data network (DN) through the first user plane network unit.

[0086] Optionally, the method further comprises: the session management network element selecting the first user plane network element as a first PSA UPF and selecting a second user plane network element as a second PSA UPF, the first PSA UPF being a PSA UPF for the first PDU session, the second user plane network element being a core network user plane network element, and the second PSA UPF being a PSA UPF for a second PDU session.

[0087] In the PDU session establishment, for a PDU session establishment request initiated by a UE passing through a PRAS and an eRG, the session management network element can select a UPF element in the eRG as a PSA UPF to establish a PDU session in a UPF selection process, or preferentially select a UPF element in the eRG close to the UE as a PSA UPF to establish a PDU session. Meanwhile, according to an operator policy and virtual network group information, the session management network element can additionally select another UPF in an operator core network as a PSA UPF to establish a PDU session, thereby establishing two PDU sessions.

[0088] Specifically, in the PDU session establishment, for PDU sessions initiated by at least two first UEs passing through a gateway, the session management network element directly selects a first user plane network element in the gateway as a PSA UPF to establish PDU sessions (first PDU sessions) between the at least two first UEs and a DN, and according to an operator policy and virtual network group information, the session management network element further selects a core network UPF as a PSA UPF to establish PDU sessions (second PDU sessions) between the at least two first UEs and the DN, so that two PDU sessions are established between the first UEs and the DN, and when the first user plane network element is disconnected from the core network, traffic forwarding between the first UEs can be implemented through the first user plane network element.

[0089] Optionally, the method further comprises: the session management network element sending third information and fourth information to the first user plane network element, the third information comprising an IP address of the first PDU session and / or an IP address network prefix of the first PDU session, the fourth information comprising first indication information and / or second indication information, the first indication information being used to indicate that all PDU sessions with the first user plane network element as the first PSA UPF use the third information until receiving new third information from the session management network element, and the second indication information being used to indicate that all PDU sessions with the first user plane network element as the first PSA UPF use one or more of forwarding quality of service (QoS) rules of the first PDU session until receiving new one or more of forwarding quality of service (QoS) rules of the first PDU session from the session management network element.

[0090] In the establishment of the first PDU session, the session management network element needs to configure and send the IP address and / or the IP address network prefix of the first PDU session and the forwarding quality of service (QoS) rules to the first user plane network element, so that the first user plane network element can forward the local area network traffic according to the forwarding quality of service (QoS) rules when receiving the traffic of the first UE.

[0091] In the embodiments of the present application, for the first user plane network element, in addition to the IP address and / or the IP address network prefix of the first PDU session and the forwarding quality of service (QoS) rules, the fourth information also needs to be configured, which is used to indicate that the IP address and / or the IP address network prefix of all PDU sessions with the first user plane network element as the anchor point remain unchanged and are permanently retained before the first user plane network element receives new IP address and / or IP address network prefix allocated by the session management network element, and the forwarding quality of service (QoS) rules of all PDU sessions with the first user plane network element as the anchor point remain unchanged and are permanently retained before the first user plane network element receives new forwarding quality of service (QoS) rules.

[0092] S420, the first user plane network element receives the first information, and determines that the first user plane network element is an anchor point of the first protocol data unit session according to the first information.

[0093] In specific implementations, when the first user plane network element receives the first information, the first user plane network element performs the function of the PSA UPF according to the first information.

[0094] Correspondingly, the first user plane network element receives third information and fourth information from the session management network element, and according to the third information and the fourth information, the first user plane network element locally forwards the local area network service by using the configured IP address and / or IP address network prefix and the forwarding quality of service rule of the first PDU session before receiving a new IP address and / or IP address network prefix and a forwarding quality of service rule configured by the session management network element.

[0095] It can be seen that the present application proposes a mobile communication local area network establishment method, the session management network element sends first information to the first user plane network element, the first information is used to indicate to establish a local area network between at least two first UEs, the first UE is a UE served by the first user plane network element; The first user plane network element receives the first information, and determines that the first user plane network element is the first protocol data unit session anchor point according to the first information. When the first UE requests to establish a PDU session, the session management network element establishes two PDU sessions with the first user plane network element as PSA UPF and the core network UPF as PSA UPF, so that when the first user plane network element is disconnected with the core network, the first user plane network element as PSA UPF can continue to locally forward the local area network service, so as to ensure the normal local area network service of the first UE when disconnected with the core network.

[0096] The above mainly introduces the scheme of the embodiments of the present application from the perspective of method execution process. It can be understood that the network device comprises the corresponding hardware structure and / or software module for executing each function in order to realize the above functions. Those skilled in the art should easily realize that, in combination with the unit and algorithm steps of each example described in the embodiments provided herein, the present application can be realized in the form of hardware or combination of hardware and computer software. Whether a certain function is executed in the form of hardware or computer software driven hardware depends on the specific application and design constraints of the technical solution. The skilled person can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0097] Please refer to Figure 5 , Figure 5 is a functional unit composition block diagram of a mobile communication local area network establishment device 500 provided by the embodiments of the present application. The device 500 can be a gateway, the device 500 can also be a first user plane network element, and the device can also be a session management network element. The device 500 comprises a transceiver unit 510 and a processing unit 520.

[0098] In a possible implementation, the apparatus 500 is configured to perform each process and step of the gateway in the mobile communication LAN establishment method described above.

[0099] The transceiver 510 is configured to send, by the gateway, first information when the first user plane network element or the gateway is disconnected from the core network, the first information being used to indicate establishment of a local area network between at least two first user terminals (UEs), the first UEs being UEs served by the first user plane network element or the gateway.

[0100] Optionally, the first information includes one or more of virtual network group information, an ID of a first PDU session, and a forwarding quality of service (QoS) rule of the first PDU session, the first PDU session being a PDU session established between the at least two first UEs and a data network (DN) through the first user plane network element.

[0101] In the sending of the first information, the transceiver 510 is specifically configured to send the first information to the first user plane network element.

[0102] Optionally, the transceiver 510 is further configured to receive, from a session management network element, second information when the first user plane network element is connected to the core network, the second information including the first information and third information, the third information including an IP address of the first PDU session and / or an IP address network prefix of the first PDU session; and send the third information to the first user plane network element.

[0103] Optionally, the first UEs connect to the gateway using a non-3GPP access technology.

[0104] Optionally, the first information includes virtual network group information.

[0105] In the sending of the first information, the transceiver 510 is specifically configured to send the first information to a non-3GPP communication module.

[0106] Optionally, the transceiver 510 is further configured to send, to an access and mobility management function (AMF), an authentication request for user authentication and authorization when the first user plane network element is connected to the core network.

[0107] The virtual network group information is received from a unified data management (UDR).

[0108] Optionally, the virtual network group information includes a plurality of virtual network group identifiers and a general public subscription identifier (GPSI) list corresponding to each virtual network group.

[0109] The processing unit 520 is configured to: when a second UE is located in a service range of the gateway and requests to join the local area network, check a GPSI of the second UE; and allow the second UE to join the local area network when the GPSI of the second UE belongs to the GPSI list.

[0110] In another possible implementation, the apparatus 500 is configured to perform each process and step of the above-mentioned method for establishing a mobile communication local area network.

[0111] The transceiver 510 is configured to receive first information, the first information being used to indicate establishment of a local area network between at least two first UEs, the first UEs being UEs served by the first user plane network unit.

[0112] The processing unit 520 is configured to determine, according to the first information, that the first user plane network unit is a first protocol data unit session anchor point.

[0113] Optionally, the first information includes one or more of virtual network group information, an ID of a first PDU session, and forwarding quality of service (QoS) rules of the first PDU session, the first PDU session being a PDU session established between the at least two first UEs and a data network (DN) through the first user plane network unit.

[0114] In the aspect of receiving the first information, the transceiver 510 is specifically configured to receive the first information from a gateway or a session management network unit.

[0115] Optionally, the transceiver 510 is further configured to receive third information from the gateway or the session management network unit, the third information including an IP address of the first PDU session and / or an IP address network prefix of the first PDU session.

[0116] Optionally, the transceiver 510 is further configured to receive fourth information from the session management network unit, the fourth information including first indication information and / or second indication information, the first indication information being used to indicate that all PDU sessions using the first user plane network unit as a first protocol data unit (PDU) session anchor (PSA) user plane function (UPF) use the third information until receiving new third information from the session management network unit, and the second indication information being used to indicate that all PDU sessions using the first user plane network unit as the first PSA UPF use one or more of the forwarding QoS rules of the first PDU session until receiving new one or more of the forwarding QoS rules of the first PDU session from the session management network unit.

[0117] In another possible implementation, the apparatus 500 is configured to perform each process and step of the session management network element in the above-described mobile communication local area network establishment method.

[0118] The transceiver 510 is configured to send first information to a first user plane network element, the first information being used to indicate establishment of a local area network between at least two first UEs, the first UEs being UEs served by the first user plane network element.

[0119] Optionally, the first information includes one or more of virtual network group information, an ID of a first PDU session, and forwarding quality of service (QoS) rules of the first PDU session, the first PDU session being a PDU session established between the at least two first UEs and a data network (DN) through the first user plane network element.

[0120] Optionally, the processing unit 520 is configured to select the first user plane network element as a first PSA UPF and select a second user plane network element as a second PSA UPF, the first PSA UPF being a PSA UPF of the first PDU session, and the second user plane network element being a core network user plane network element, the second PSA UPF being a PSA UPF of a second PDU session.

[0121] Optionally, the transceiver 510 is further configured to send third information and fourth information to the first user plane network element, the third information including an IP address of the first PDU session and / or an IP address network prefix of the first PDU session, and the fourth information including first indication information and / or second indication information, the first indication information being used to indicate that all PDU sessions using the first user plane network element as the first PSA UPF use the third information until receiving new third information from the session management network element, and the second indication information being used to indicate that all PDU sessions using the first user plane network element as the first PSA UPF use one or more of the forwarding QoS rules of the first PDU session until receiving new one or more of the forwarding QoS rules of the first PDU session from the session management network element.

[0122] Optionally, the transceiver 510 is further configured to send second information to a gateway, the second information including the first information and the third information.

[0123] It can be understood that the functions of each program module of the mobile communication local area network establishment apparatus according to the embodiments of the present application can be implemented according to the methods in the above-described method embodiments, and the specific implementation process can be referred to the related description of the above-described method embodiments, which will not be described here in detail.

[0124] It should be understood that the apparatus 500 herein is embodied in the form of functional units. The term "unit" herein can refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (for example, a shared processor, a dedicated processor, or a group processor, etc.) and a memory for executing one or more software or firmware programs, a combination of logic circuitry and / or other suitable components that support the described functions. In an optional example, those skilled in the art can understand that the apparatus 500 can be embodied in the terminal device in the above embodiments, and the apparatus 500 can be used to execute the respective processes and / or steps corresponding to the terminal device in the above method embodiments. To avoid repetition, details are not described here.

[0125] The apparatus 500 of each of the above schemes has a function of implementing the corresponding steps performed by the terminal device in the above method; the function can be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions; for example, the transceiver unit 510 can be replaced by a transmitter and a receiver, and the processing unit 520 can be replaced by a processor, which respectively perform the transceiving operations and related processing operations in each method embodiment.

[0126] In the embodiments of the present application, the apparatus 500 can also be a chip or a chip system, for example, a system on chip (SoC). Correspondingly, the detection unit can be a detection circuit of the chip, which is not limited here.

[0127] Please refer to Figure 6 , Figure 6 is a structural schematic diagram of an electronic device provided in an embodiment of the present application. The terminal device includes one or more processors, one or more memories, one or more communication interfaces, and one or more programs; the one or more programs are stored in the memory and configured to be executed by the one or more processors.

[0128] In a possible implementation, the electronic device is a gateway, and the above program includes instructions for performing the following steps:

[0129] When the first user plane network element or the gateway is disconnected from the core network, the first information is sent, and the first information is used to indicate that a local area network between at least two first user terminals (UEs) is established, and the first UE is a UE served by the first user plane network element or the gateway.

[0130] In a possible implementation, the electronic device is a first user plane network element, and the above program includes instructions for performing the following steps:

[0131] receiving first information, the first information being used for indicating to establish a local area network between at least two first UEs, the first UEs being UEs served by the first user plane network element;

[0132] determining, according to the first information, the first user plane network element as a first protocol data unit session anchor point.

[0133] In a possible implementation, the electronic device is a session management network element, and the program includes instructions for performing the following steps:

[0134] sending, to a first user plane network element, first information, the first information being used for indicating to establish a local area network between at least two first UEs, the first UEs being UEs served by the first user plane network element.

[0135] All related contents of each scenario involved in the method embodiments can be referred to the function description of the corresponding function modules, which will not be repeated here.

[0136] It should be understood that the above-mentioned memory can include read-only memory and random access memory, and provide instructions and data for the processor. A part of the memory can also include non-volatile random access memory. For example, the memory can also store device type information.

[0137] In the embodiments of the present application, the processor of the apparatus can be a central processing unit (CPU), and the processor can also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0138] It should be understood that "at least one" in the embodiments of the present application refers to one or more, and "multiple" refers to two or more. The "and / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural. The character " / " generally represents that the associated objects before and after it are in an "or" relationship. "At least one of the following" or similar expressions means any combination of these items, including any combination of single item or multiple items. For example, at least one of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, and c can be single or multiple.

[0139] In addition, unless otherwise stated, the ordinal numbers such as "first", "second", etc. mentioned in the embodiments of the present application are used to distinguish different objects, and are not used to limit the order, time sequence, priority or importance of the objects. For example, the first information and the second information are only used to distinguish different information, and do not mean that the contents, priority, sending order or importance of the two kinds of information are different.

[0140] In the implementation process, each step of the above method can be completed by integrated logic circuits of hardware in the processor or instructions in the form of software. The steps of the method disclosed in the embodiments of the present application can be directly embodied as execution completed by a hardware processor, or executed by a combination of hardware and software units in the processor. The software unit can be located in a mature storage medium in the art such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, register, etc. The storage medium is located in the memory, and the processor executes the instructions in the memory to complete the steps of the above method in combination with the hardware thereof. To avoid repetition, it will not be described in detail here.

[0141] The embodiments of the present application provide a chip, which is used for sending first information when a first user plane network element or the gateway is disconnected with a core network, the first information being used for indicating to establish a local area network between at least two first user terminals (UEs), the first UEs being UEs served by the first user plane network element or the gateway.

[0142] The embodiments of the present application provide a chip module, comprising a transceiver assembly and a chip, wherein the chip is used for sending first information through the transceiver assembly when a first user plane network element or the gateway is disconnected with a core network, the first information being used for indicating to establish a local area network between at least two first user terminals (UEs), the first UEs being UEs served by the first user plane network element or the gateway.

[0143] The embodiments of the present application provide a chip, which is used for receiving first information, the first information being used for indicating to establish a local area network between at least two first UEs, the first UEs being UEs served by the first user plane network element; and the chip is further used for determining that the first user plane network element is a first protocol data unit session anchor according to the first information.

[0144] The embodiment of the present application provides a chip module, comprising a transceiver assembly and a chip, wherein the chip is configured to receive first information through the transceiver assembly, the first information is used for indicating establishment of a local area network between at least two first UEs, the first UE is a UE served by the first user plane network element; and the chip is configured to determine the first user plane network element as a first protocol data unit session anchor point according to the first information.

[0145] The embodiment of the present application provides a chip, configured to send first information to a first user plane network element, the first information is used for indicating establishment of a local area network between at least two first UEs, the first UE is a UE served by the first user plane network element.

[0146] The embodiment of the present application provides a chip module, comprising a transceiver assembly and a chip, wherein the chip is configured to send first information to a first user plane network element through the transceiver assembly, the first information is used for indicating establishment of a local area network between at least two first UEs, the first UE is a UE served by the first user plane network element.

[0147] The embodiment of the present application also provides a computer storage medium, wherein the computer storage medium stores a computer program for electronic data exchange, and the computer program causes a computer to execute part or all steps of any method described in the above method embodiments.

[0148] The embodiment of the present application also provides a computer program product, which comprises a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute part or all steps of any method described in the above method embodiments. The computer program product can be a software installation package.

[0149] It should be noted that, for the above-mentioned method embodiments, in order to simply describe, all are described as a series of action combinations, but those skilled in the art should know that the present application is not limited to the action sequence described, because according to the present application, some steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should know that the embodiments described in the specification all belong to preferred embodiments, and the actions and modules involved are not necessarily necessary for the present application.

[0150] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0151] In several embodiments provided in the present application, it should be understood that the disclosed apparatus can be implemented in other manners. For example, the division of the apparatus embodiments is merely illustrative, and the division of the units can be changed according to actual needs. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, devices or units, and can be in electrical, mechanical or other forms.

[0152] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiments of the present application.

[0153] In addition, each functional unit in the various embodiments of the present application can be integrated into a processing unit, or each unit can exist physically, or two or more units can be integrated into one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0154] When the integrated unit is realized in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a TRP, etc.) to execute all or part of the steps of the various embodiments of the method of the present application. The aforementioned storage medium includes: a U disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a mobile hard disk, a magnetic disk or an optical disk, and various media that can store program codes.

[0155] Those of ordinary skill in the art can understand that all or part of the steps of the various methods in the above embodiments can be completed by a program instructing relevant hardware, and the program can be stored in a computer readable storage medium, which can include a flash disk, a ROM, a RAM, a magnetic disk or an optical disk, etc.

[0156] The above has carried out the detailed introduction to the embodiment of the application, the principle and implementation mode of the application have been described by applying specific examples in this paper, the above embodiment explanation is only used for helping understanding the method of the application and its core idea; at the same time, for the general technical personnel in the art, according to the idea of the application, the specific implementation mode and application range will have the change, and the above is described, the content of the specification should not be understood as the limitation of the application.

Claims

1. A method of establishing a mobile communication local area network, characterized by, The method applied to a gateway comprises: When a first user plane network element or the gateway is disconnected with a core network, the gateway sends first information, the first information being used for indicating to establish a local area network between at least two first user terminals (UEs), the first UEs being UEs served by the first user plane network element or the gateway; The gateway comprises the first user plane network element.

2. The method of claim 1, wherein, The first information comprises one or more of virtual network group information, an ID of a first PDU session, and a forwarding quality of service (QoS) rule of the first PDU session, the first PDU session being a PDU session established between the at least two first UEs and a data network (DN) through the first user plane network element; The gateway sending the first information comprises: the gateway sending the first information to the first user plane network element.

3. The method of claim 2, wherein, The method further comprises: When the first user plane network element is connected with the core network, the gateway receives second information from a session management network element, the second information comprising the first information and third information, the third information comprising an IP address of the first PDU session and / or an IP address network prefix of the first PDU session; The gateway sends the third information to the first user plane network element.

4. The method of claim 1, wherein, The first UEs connect the gateway by using a non-3GPP access technology.

5. The method of claim 4, wherein, The first information comprises virtual network group information; The gateway sending the first information comprises: the gateway sending the first information to a non-3GPP communication module.

6. The method of claim 5, wherein, The method further comprises: When the first user plane network element is connected with the core network, the gateway sends an authentication request to an AMF for user authentication and authorization; The gateway receives the virtual network group information from a unified data management (UDR).

7. The method of claim 6, wherein, The virtual network group information comprises a plurality of virtual network group identifications and a general public user identification (GPSI) list corresponding to each virtual network group; The method further comprises: when a second UE is located in a service range of the gateway and requests to join the local area network, the gateway checks a GPSI of the second UE; When the GPSI of the second UE belongs to the GPSI list, the gateway allows the second UE to join the local area network.

8. A method of establishing a mobile communication local area network, characterized by The method applied to a first user plane network element comprises: When the first user plane network element or a gateway is disconnected with a core network, the first user plane network element receives first information, the first information being used for indicating to establish a local area network between at least two first UEs, the first UEs being UEs served by the first user plane network element; The first user plane network element determines, according to the first information, that the first user plane network element is a first protocol data unit (PDU) session anchor point; The first user plane network element is a user plane network element in a gateway.

9. The method of claim 8, wherein, The first information includes one or more of virtual network group information, an ID of the first PDU session, and forwarding quality of service (QoS) rules of the first PDU session, the first PDU session being established by the at least two first UEs through the first user plane network element to establish a PDU session between the first user plane network element and a data network (DN). The first user plane network element receiving the first information includes the first user plane network element receiving the first information from the gateway or the session management network element.

10. The method of claim 9, wherein, The method further includes: The first user plane network element receiving third information from the gateway or the session management network element, the third information including an IP address of the first PDU session and / or an IP address network prefix of the first PDU session.

11. The method of claim 10, wherein, The method further includes: The first user plane network element receiving fourth information from the session management network element, the fourth information including first indication information and / or second indication information, the first indication information indicating that PDU sessions using the first user plane network element as a first PSA UPF use the third information until receiving new third information from the session management network element, and the second indication information indicating that PDU sessions using the first user plane network element as the first PSA UPF use one or more of the forwarding QoS rules of the first PDU session until receiving new one or more of the forwarding QoS rules of the first PDU session from the session management network element.

12. A method of establishing a mobile communication local area network, characterized by The method applied to a session management network element includes When a first user plane network element or a gateway is disconnected from a core network, the session management network element sends first information to the first user plane network element, the first information indicating establishment of a local area network between at least two first UEs, the first UEs being UEs served by the first user plane network element. The first user plane network element is a user plane network element in a gateway.

13. The method of claim 12, wherein, The first information includes one or more of virtual network group information, an ID of the first PDU session, and forwarding quality of service (QoS) rules of the first PDU session, the first PDU session being established by the at least two first UEs through the first user plane network element to establish a PDU session between the first user plane network element and a data network (DN).

14. The method of claim 13, wherein, The method further includes: The session management network element selects the first user plane network element as a first PSA UPF for the first PDU session and selects a second user plane network element as a second PSA UPF, the second user plane network element being a core network user plane network element, the second PSA UPF being a PSA UPF for a second PDU session.

15. The method of claim 14, wherein, The method further includes: The session management network element sends third information and fourth information to the first user plane network element, the third information includes an IP address of the first PDU session and / or an IP address network prefix of the first PDU session, and the fourth information includes first indication information and / or second indication information, the first indication information is used to indicate that all PDU sessions with the first user plane network element as the first PSA UPF use the third information until new third information from the session management network element is received, and the second indication information is used to indicate that all PDU sessions with the first user plane network element as the first PSA UPF use one or more of forwarding quality of service, QoS, rules of the first PDU session until one or more of new forwarding quality of service, QoS, rules of the first PDU session from the session management network element is received.

16. The method of claim 15, wherein, The method further includes: The session management network element sends second information to a gateway, the second information including the first information and the third information.

17. A mobile communication LAN establishing apparatus characterized by comprising: The device applied to a gateway includes: A transceiver unit is configured to send first information when a first user plane network element or the gateway is disconnected from a core network, the first information being used to indicate establishment of a local area network between at least two first user terminals, UE, the first UE being a UE served by the first user plane network element or the gateway. The gateway includes the first user plane network element.

18. A mobile communication LAN establishing apparatus characterized by comprising: The device applied to a first user plane network element includes: A transceiver unit is configured to receive first information when the first user plane network element or a gateway is disconnected from a core network, the first information being used to indicate establishment of a local area network between at least two first UEs, the first UE being a UE served by the first user plane network element. A processing unit is configured to determine, according to the first information, that the first user plane network element is a first protocol data unit session anchor point. The first user plane network element is a user plane network element in a gateway.

19. A mobile communication LAN establishing apparatus characterized by comprising: The device applied to a session management network element includes: A transceiver unit is configured to send first information to a first user plane network element when the first user plane network element or a gateway is disconnected from a core network, the first information being used to indicate establishment of a local area network between at least two first UEs, the first UE being a UE served by the first user plane network element. The first user plane network element is a user plane network element in a gateway.

20. A chip, characterized by The chip is configured to send first information when a first user plane network element or a gateway is disconnected from a core network, the first information being used to indicate establishment of a local area network between at least two first user terminals, UE, the first UE being a UE served by the first user plane network element. The gateway includes the first user plane network element.

21. A chip module, characterized by The chip is configured to receive first information from a first user plane network element or a gateway when the first user plane network element or the gateway is disconnected from a core network, the first information being used to indicate establishment of a local area network between at least two first user equipment (UE), the first UE being a UE served by the first user plane network element. The gateway comprises the first user plane network element.

22. A chip, characterized by The chip is configured to receive first information from a first user plane network element or a gateway when the first user plane network element or the gateway is disconnected from a core network, the first information being used to indicate establishment of a local area network between at least two first user equipment (UE), the first UE being a UE served by the first user plane network element. The chip is further configured to determine, according to the first information, that the first user plane network element is a first protocol data unit session anchor point. The first user plane network element is a user plane network element in a gateway.

23. A chip module, characterized by The chip is configured to receive first information from a first user plane network element or a gateway when the first user plane network element or the gateway is disconnected from a core network, the first information being used to indicate establishment of a local area network between at least two first user equipment (UE), the first UE being a UE served by the first user plane network element. The chip is configured to determine, according to the first information, that the first user plane network element is a first protocol data unit session anchor point. The first user plane network element is a user plane network element in a gateway.

24. A chip, characterized by The chip is configured to send first information to a first user plane network element when the first user plane network element or a gateway is disconnected from a core network, the first information being used to indicate establishment of a local area network between at least two first user equipment (UE), the first UE being a UE served by the first user plane network element. The first user plane network element is a user plane network element in a gateway.

25. A chip module, characterized by The chip is configured to send first information to a first user plane network element when the first user plane network element or a gateway is disconnected from a core network, the first information being used to indicate establishment of a local area network between at least two first user equipment (UE), the first UE being a UE served by the first user plane network element. The first user plane network element is a user plane network element in a gateway.

26. An electronic device, comprising: The electronic device includes a processor, a memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the programs including instructions for performing steps in the method of any one of claims 1-7, or instructions for performing steps in the method of any one of claims 8-11, or instructions for performing steps in the method of any one of claims 12-16.

27. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes a computer to perform the steps of the method according to any one of claims 1 to 7, or the steps of the method according to any one of claims 8 to 11, or the steps of the method according to any one of claims 12 to 16.

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