WO2018233484A1 - 会话管理方法、及装置 - Google Patents

会话管理方法、及装置 Download PDF

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Publication number
WO2018233484A1
WO2018233484A1 PCT/CN2018/089974 CN2018089974W WO2018233484A1 WO 2018233484 A1 WO2018233484 A1 WO 2018233484A1 CN 2018089974 W CN2018089974 W CN 2018089974W WO 2018233484 A1 WO2018233484 A1 WO 2018233484A1
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WIPO (PCT)
Prior art keywords
session
agf
user equipment
identifier
pdu session
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PCT/CN2018/089974
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English (en)
French (fr)
Inventor
于游洋
李汉成
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to KR1020217041057A priority Critical patent/KR102570017B1/ko
Priority to KR1020197036476A priority patent/KR20200006104A/ko
Priority to EP18821581.8A priority patent/EP3618561B1/en
Priority to JP2020517255A priority patent/JP6908781B2/ja
Publication of WO2018233484A1 publication Critical patent/WO2018233484A1/zh
Priority to US16/703,314 priority patent/US11252775B2/en
Priority to US17/582,152 priority patent/US11785663B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/14—Session management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/25—Maintenance of established connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2854—Wide area networks, e.g. public data networks
    • H04L12/2856—Access arrangements, e.g. Internet access
    • H04L12/2858—Access network architectures
    • H04L12/2859—Point-to-point connection between the data network and the subscribers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/04—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration using triggered events
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/08—Upper layer protocols
    • H04W80/10—Upper layer protocols adapted for application session management, e.g. SIP [Session Initiation Protocol]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a session management method and apparatus.
  • a User Equipment is also referred to as a Customer Premises Equipment (CPE).
  • CPE Customer Premises Equipment
  • the present application also includes a hardware entity on the user side, for example: Residential Gateway (RG), Fixed Network Residential Gateway (FNRG), etc.
  • the 3GPP standards group has developed a next-generation mobile communication network architecture (NGS) called 5G network architecture.
  • NGS next-generation mobile communication network architecture
  • the 5G network architecture not only supports the use of the 3GPP standard group defined wireless technology to access the 5G core network (Core network, CN), but also supports the non-3GPP (non-3GPP) access technology through the non-3GPP conversion function (non-3GPP Interworking Function) , N3IWF) or next generation packet data gateway (ngPDG) accesses the 5G core network.
  • the wireless technologies defined by the 3GPP standard group include: Long Term Evolution (LTE), 5G Radio Access Network (RAN), and the like.
  • the functions of the 5G core network are divided into User plane function (UPF) devices and Control plane function (CPF) devices.
  • the user plane network element is mainly responsible for packet data packet forwarding, quality of service (QoS) control, and accounting information statistics.
  • the control plane network element is mainly responsible for user registration authentication, mobility management, and sending packet forwarding policies and QoS control policies to the UPF, which can be further subdivided into Core Access and Mobility Management Function (AMF) devices and sessions.
  • AMF Core Access and Mobility Management Function
  • Management Function (SMF) device Specifically, the AMF is responsible for the registration process when the user equipment is accessed and the location management during the movement of the user equipment.
  • the network side When the SMF is responsible for the user equipment to initiate the service, the network side establishes a corresponding session connection, and provides a specific service for the user equipment.
  • the NG4 interface between the SMF and the UPF sends a packet forwarding policy and a QoS policy to the UPF.
  • user equipment initiates session establishment in two forms: establishing a session through a fixed network to establish a fixed network, and establishing a session through a mobile network to initiate a connection to the mobile network.
  • the 5G CN does not support user equipment to access the 5G CN through the fixed network.
  • the technical problem to be solved by the embodiments of the present invention is to provide a session management method and device, and implement the user equipment to access the 5G CN through the fixed network, which is referred to as a 5G fusion core network in this application.
  • an embodiment of the present invention provides a session management method, including:
  • the user equipment sends a Non Access Stratum (NAS) message to an Access Gateway Function (AGF), the NAS message including a PDU for requesting establishment of a packet data unit (PDU) session.
  • AMF Access Gateway Function
  • PDU packet data unit
  • AMF Access Gateway Function
  • the user equipment sends a NAS message to establish a PDU session, and establishes an access session with the AGF. Since the access session is related to the PDU session, the user equipment can associate the PDU session to the access session, so that the user equipment is solid.
  • the access session includes:
  • PPPoE Point-to-Point Protocol Over Ethernet
  • L2 Layer 2
  • L3 Layer 3
  • GRE General routing Generic Routing Encapsulation
  • L2 is a data link later
  • L3 is a network layer.
  • an implementation of the AGF to identify the NAS is also provided, as follows:
  • the NAS message is encapsulated in the NAS message identifier, and the NAS message identifier is used to identify the NAS message.
  • the NAS message identifier may be any information that can be recognized by the AGF, and the NAS message identifier is agreed between the user equipment and the AGF to distinguish between the NAS message and the user plane data.
  • two optional implementations of sending a NAS message are also provided, as follows: before the user equipment sends a non-access stratum NAS message to the AGF, the method further includes: establishing the a PPPoE session between the user equipment and the AGF; the user equipment sending the non-access stratum NAS message to the AGF, the user equipment encapsulating the NAS message in the PPPoE session, where the PPPoE session identifier is Said NAS message identifier;
  • the sending, by the user equipment, the non-access stratum NAS message to the AGF includes: a PPPoE discovery process, an Internet Protocol Control Protocol (IPCP) process, and a Link Control Protocol (LCP) process.
  • IPCP Internet Protocol Control Protocol
  • LCP Link Control Protocol
  • the former first establishes a PPPoE session for transmitting NAS messages.
  • the PPPoE session itself can be used to let the AGF know that the NAS message is sent, so that no new identification information can be used.
  • the latter implementation provides several application scenarios for sending NAS messages.
  • the AGF is further configured to let the AGF know the PDU session is related to the access session, and the PDU session establishment request message further includes a session identifier, where the session identifier is Identification information of the access session related to the PDU session.
  • the session identifier may be any one that is agreed between the AGF and the PDU to identify which access session the PDU session is associated with. Since the PDU session establishment request is used to request to establish a PDU session, the session identifier may be any identifier capable of identifying an access session or corresponding to an access session or corresponding to a user equipment.
  • the method further includes: the AGF receiving PDU session information sent by the SMF; the AGF assigning a session identifier to the PDU session; and the AGF sending the session identifier to The SMF, the SMF sends the session identifier to the user equipment in a PDU session establishment success message;
  • the AGF receives the PDU session establishment success message sent by the SMF, and the AGF allocates a session identifier to the PDU session; the AGF encapsulates the PDU session establishment success message in the session identifier and sends the message to the user equipment.
  • the device on the network side is also provided.
  • the AGF informs the user equipment which PDU session the new PDU session is related to, and the following is as follows: the PDU session establishment success message includes the session. And identifying, the session identifier is identifier information of an access session related to the PDU session; or the PDU session establishment success message is encapsulated in a session identifier, where the session identifier is an access session related to the PDU session Identification information.
  • the session identifier included in the session establishment success message may be any identifier information that can identify the access session or corresponds to the access session or corresponds to the user equipment.
  • the session identifier includes: a MAC address of the AGF, an Internet Protocol IP address of the AGF, and a virtual local area network. At least one of a VLAN tag, a GRE tunnel identity, a Multi-Protocol Label Switching (MPLS) tag, a PPPoE session identifier, a MAC address of the user equipment, and an Internet Protocol IP address of the user equipment.
  • MPLS Multi-Protocol Label Switching
  • establishing an access session between the user equipment and the AGF includes:
  • the user equipment sends a PPPoE message or an access session message to the AGF, where the PPPoE message is used to establish a PPPoE session, and the PPPoE session is bound to a PDU session corresponding to the session identifier;
  • the access session message is used to request to establish an access session, and the access session is bound to a PDU session corresponding to the session identifier.
  • the binding may be considered as obtaining or saving a correspondence between the access session and the PDU session corresponding to the session identifier, and the correspondence may be stored by some, for example, a table or other data structure.
  • the PPPoE message is used to establish a PPPoE session, including: PPPoE Active Discovery Initiation (PADI), PPPoE Active Discovery Offer (PADO), PPPoE Active Discovery Request (PADR), PPPoE acknowledgment (PPPoE). PPPoE Active Discovery Session-Confirmation (PADS), PPPoE Active Discovery Terminate (PADT), Link Control Protocol (LCP), and Internet Protocol Control Protocol (IPCP) messages.
  • PADI PPPoE Active Discovery Initiation
  • PADO PPPoE Active Discovery Offer
  • PADR PPPoE Active Discovery Request
  • PPPoE acknowledgment PPPoE
  • PPPoE Active Discovery Session-Confirmation (PADS) PPPoE Active Discovery Terminate
  • LCP Link Control Protocol
  • IPCP Internet Protocol Control Protocol
  • a solution for performing data transmission after the PDU session and the access session are established is also provided, where the method further includes:
  • the user equipment sends a data packet of a PDU session, and encapsulates the data packet by using a session identifier corresponding to the PDU session.
  • the AGF can know which PDU session the data packet of the data packet is, thereby continuing the subsequent data packet forwarding and processing flow.
  • the specific encapsulation manner of the data packet corresponding to the PDU session is also provided, as follows:
  • the method further includes:
  • the user equipment determines a PPPoE session identifier corresponding to the PDU session, and encapsulates the data packet of the PDU session into the PPPoE session identifier and sends the data packet to the AGF;
  • the user equipment determines a MAC address of the AGF corresponding to the PDU session or an Internet Protocol IP address of the AGF, and encapsulates a data packet of the PDU session to a MAC address of the AGF or the AGF.
  • the Internet Protocol IP address is sent to the AGF;
  • the user equipment determines a virtual wireless local area network (VLAN) VLAN tag corresponding to the PDU session, and the multi-protocol label switching MPLS label, the data packet of the PDU session is encapsulated into the VLAN tag and sent to the AGF;
  • VLAN virtual wireless local area network
  • the user equipment determines the GRE tunnel identifier corresponding to the PDU session, and encapsulates the data packet of the PDU session into the GRE tunnel and sends the data packet to the AGF;
  • the user equipment determines the user equipment MAC address corresponding to the PDU session, and encapsulates the data packet of the PDU session into the user equipment MAC address and sends the data packet to the AGF.
  • an optional implementation of the NAS message identifier is further provided as follows: the NAS message is encapsulated in a layer 2 data packet, and the NAS message identifier includes: a virtual local area network VLAN tag, or, AGF MAC address, or, Ethernet type;
  • the NAS message is encapsulated in a layer 3 data packet, where the NAS message identifier includes: a user datagram protocol UDP port number, or a predetermined destination IP address;
  • the NAS message is encapsulated in a PPPoE session, and the NAS message identifier includes: the PPPoE session identifier;
  • the NAS message is encapsulated in a GRE tunnel, and the NAS message identifier includes: an identifier of the GRE tunnel;
  • the NAS message is encapsulated in an Extensible Authentication Protocol EAP message, where the NAS message identifier includes: the EAP parameter type;
  • the NAS message is encapsulated in a predetermined protocol layer, and the NAS message identifier includes: the predetermined protocol layer.
  • the second embodiment of the present invention further provides a session management method, including:
  • the access gateway function AGF receives a non-access stratum NAS message sent by the user equipment, where the NAS message includes a PDU session establishment request message for requesting to establish a PDU session;
  • the AGF sends the NAS message to the mobility management function AMF; after receiving the PDU session establishment success message, the AGF sends the PDU session establishment success message to the user equipment;
  • An access session is established between the AGF and the user equipment, where the access session is an access session related to the PDU session.
  • the PDU session established by the user equipment and the access session between the AGF and the user equipment are known, so that the access session and the PDU session can be associated with each other, so that the user equipment accesses the 5G through the fixed network.
  • the purpose of CN is the PDU session established by the user equipment and the access session between the AGF and the user equipment.
  • the access session includes:
  • the encapsulation mode of the NAS is further provided as follows: the NAS message is encapsulated in the NAS message identifier, and the NAS message identifier is used to identify the NAS message.
  • the NAS message is encapsulated into the NAS message identifier, and the AGF can distinguish the NAS message according to the NAS message.
  • an optional implementation of the NAS is also provided, as follows: Before the access gateway function AGF receives the non-access stratum NAS message sent by the user equipment, the method further includes: Establishing a PPPoE session between the user equipment and the AGF; the access gateway function AGF receiving the non-access stratum NAS message sent by the user equipment includes: receiving the NAS message encapsulated in the PPPoE session, where The PPPoE session identifier is the NAS message identifier;
  • the access gateway function AGF receiving the non-access stratum NAS message sent by the user equipment includes: receiving any one of the user equipment through a PPPoE discovery process, a network control protocol IPCP process, and a link control protocol LCP process. Message to the NAS message sent by the AGF.
  • the former first establishes a PPPoE session for transmitting NAS messages.
  • the PPPoE session itself can be used to let the AGF know that the NAS message is sent, so that no new identification information can be used.
  • the latter implementation provides several application scenarios for sending NAS messages.
  • a specific sending scheme of the PDU session establishment request message is further provided, where the PDU session establishment request message further includes a session identifier, where the session identifier is related to the PDU session. Identification information of the access session.
  • the PDU session establishment request message is used to carry the session identifier, so that the AGF can determine which access session is related to the PDU session that is requested to be established according to the session identifier.
  • establishing an access session between the user equipment and the AGF includes:
  • the AGF receives a PPPoE message or an access session message that is sent by the user equipment, and the PPPoE message is used to establish a PPPoE session; the PPPoE session is bound to a PDU session corresponding to the session identifier; The access session message is used to establish an access session, and the access session is bound to a PDU session corresponding to the session identifier.
  • the binding may be considered as obtaining or saving a correspondence between the access session and the PDU session corresponding to the session identifier, and the correspondence may be stored by some, for example, a table or other data structure.
  • the session identifier includes: the MAC address of the AGF, the Internet Protocol IP address of the AGF, the VLAN tag of the virtual local area network, and the GRE. At least one of a tunnel identity, a multi-protocol label switching MPLS label, a PPPoE session identifier, a MAC address of the user equipment, and an internet protocol IP address of the user equipment.
  • the method further includes:
  • the AGF sends the Internet Protocol IP address of the user equipment allocated by the received SMF to the user equipment by using a PPPoE message.
  • the implementation of the data transmission is performed after the PDU session and the access session are established, and the method is as follows:
  • the AGF can forward the packet accordingly.
  • the specific encapsulation scheme of the data packet is further provided, as follows: after the access session is corresponding to the PDU session, the method further includes:
  • the data packet is encapsulated into a PPPoE session identifier, and the PDU session corresponding to the data packet is determined according to the PPPoE session identifier;
  • the data packet is encapsulated into the MAC address of the AGF or the Internet Protocol IP address of the AGF, and the corresponding location of the data packet is determined according to the MAC address of the AGF or the Internet Protocol IP address of the AGF.
  • the data packet is encapsulated into a virtual WLAN VLAN tag or a multi-protocol label switching MPLS label, and the PDU session corresponding to the data packet is determined according to the VLAN tag or the multi-protocol label switching MPLS label;
  • the data packet is encapsulated into a GRE tunnel, and the PDU session corresponding to the data packet is determined according to the GRE tunnel identifier;
  • the data packet is encapsulated into a MAC address of the user equipment or a user equipment Internet Protocol IP address, and the PDU session corresponding to the data packet is determined according to the MAC address of the user equipment or the user equipment IP address.
  • the third embodiment of the present invention further provides a session management method, including:
  • the session management function SMF receives a PDU session establishment request message, where the PDU session establishment request message is used to request to establish a PDU session;
  • the SMF obtains the session identifier corresponding to the PDU session, and sends the session identifier to the access gateway function AGF or the user equipment; the session identifier is identifier information of the access session related to the PDU session.
  • the SMF establishes a PDU session for the user equipment, and obtains the session identifier. After the AGF or the user equipment is notified, the user equipment and the AGF can be instructed to learn which access session the PDU session corresponds to.
  • the specific implementation of the session identifier is sent to the AGF or the user equipment, as follows: the session identifier corresponding to the PDU session is obtained, and the session identifier is sent to the AGF or User equipment includes:
  • the SMF After receiving the session identifier, the SMF sends a PDU session establishment success message to the user equipment, and the session identifier is included in the PDU session establishment success message;
  • the SMF sends the SM information to the AGF after receiving the session identifier that is allocated by the user equipment, and the session identifier is included in the SM information.
  • the session identifier includes:
  • the MAC address of the AGF, the Internet Protocol IP address of the AGF, the virtual local area network VLAN tag, the GRE tunnel identity, the multi-protocol label switching MPLS label, the peer-to-peer protocol PPPoE session identifier on the Ethernet, the MAC address of the user equipment, and the user equipment At least one of the Internet Protocol IP addresses.
  • the SMF sends the SM information to the AGF to notify the session identifier of the specific implementation, as follows: the sending the SM information to the AGF includes:
  • the SMF sends the SM information to the AGF, where the SM information includes a virtual local area network (VLAN) VLAN tag, a GRE tunnel identity, a multi-protocol label switching MPLS label, a PPPoE session identifier, or an Internet Protocol IP address or user equipment of the user equipment. At least one of the MAC address addresses.
  • VLAN virtual local area network
  • a specific implementation scheme for informing the session identifier to the user equipment by using the PDU session establishment success message is also provided, as follows: The method further includes:
  • the SMF sends a PDU session establishment success message to the user equipment, where the PDU session establishment success message includes the MAC address of the AGF, the Internet Protocol IP address of the AGF, the virtual local area network VLAN tag, the GRE tunnel identity, and the multi-protocol. At least one of a label switched MPLS label and a PPPoE session identifier.
  • the embodiment of the present invention further provides a user equipment, including:
  • a sending unit configured to send a non-access stratum NAS message to the access gateway function AGF, where the NAS message includes a PDU session establishment request message for requesting to establish a PDU session;
  • a receiving unit configured to receive a PDU session establishment success message returned by the network side device
  • a session establishing unit configured to establish an access session with the AGF, where the access session is an access session related to the PDU session.
  • the access session includes:
  • the NAS message is encapsulated in an NAS message identifier, and the NAS message identifier is used to identify the NAS message.
  • the session establishing unit is further configured to establish a PPPoE session between the user equipment and the AGF before the user equipment sends a non-access stratum NAS message to the AGF;
  • the sending unit configured to send the non-access stratum NAS message to the AGF, includes: encapsulating the NAS message in the PPPoE session, where the PPPoE session identifier is the NAS message identifier;
  • the sending unit configured to send the non-access stratum NAS message to the AGF, includes: sending, by using a message of any one of a PPPoE discovery process, a network control protocol IPCP process, and a link control protocol LCP process, to the AGF The NAS message.
  • the PDU session establishment request message further includes a session identifier, where the session identifier is identifier information of the access session related to the PDU session.
  • the receiving unit is further configured to receive PDU session information sent by the SMF;
  • the sending unit is further configured to send the session identifier to the SMF, and the SMF sends the session identifier to the user equipment in a PDU session establishment success message;
  • the receiving unit is further configured to receive a PDU session establishment success message sent by the SMF, where the AGF allocates a session identifier to the PDU session;
  • the sending unit is further configured to encapsulate the PDU session establishment success message in the session identifier and send the message to the user equipment.
  • the PDU session establishment success message includes the session identifier, where the session identifier is identifier information of an access session related to the PDU session; or the PDU session establishment success message Encapsulated in the session identifier, the session identifier is identifier information of an access session related to the PDU session.
  • the session identifier includes: a MAC address of the AGF, an Internet Protocol IP address of the AGF, a virtual local area network VLAN tag, a GRE tunnel identity, a multi-protocol label switching MPLS label, and a PPPoE session identifier. At least one of a MAC address of the user equipment and an Internet Protocol IP address of the user equipment.
  • the session establishing unit configured to establish an access session with the AGF, includes: sending, by the sending unit, a PPPoE message or an access that includes the session identifier to the AGF.
  • a session message the PPPoE message is used to establish a PPPoE session, and the PPPoE session is bound to a PDU session corresponding to the session identifier;
  • the access session message is used to request to establish an access session, and the access session and the session are The PDU session binding corresponding to the session identifier.
  • the sending unit is further configured to send a data packet of the PDU session, and encapsulate the data packet by using a session identifier corresponding to the PDU session.
  • the user equipment further includes:
  • the encapsulating unit is configured to determine a PPPoE session identifier corresponding to the PDU session, and encapsulate the data packet of the PDU session into the PPPoE session identifier and send the data to the AGF;
  • the user equipment MAC address corresponding to the PDU session is determined, and the data packet of the PDU session is encapsulated into the user equipment MAC address and sent to the AGF.
  • the NAS message is encapsulated in a layer 2 data packet, where the NAS message identifier includes: a virtual local area network VLAN tag, or a MAC address of the AGF, or an Ethernet type;
  • the NAS message is encapsulated in a layer 3 data packet, where the NAS message identifier includes: a user datagram protocol UDP port number, or a predetermined destination IP address;
  • the NAS message is encapsulated in a PPPoE session, and the NAS message identifier includes: the PPPoE session identifier;
  • the NAS message is encapsulated in a GRE tunnel, and the NAS message identifier includes: an identifier of the GRE tunnel;
  • the NAS message is encapsulated in an Extensible Authentication Protocol EAP message, where the NAS message identifier includes: the EAP parameter type;
  • the NAS message is encapsulated in a predetermined protocol layer, and the NAS message identifier includes: the predetermined protocol layer.
  • the embodiment of the present invention further provides an access gateway function device, including:
  • a receiving unit configured to receive a non-access stratum NAS message sent by the user equipment, where the NAS message includes a PDU session establishment request message for requesting to establish a PDU session;
  • a sending unit configured to send the NAS message to the mobility management function AMF;
  • the receiving unit is further configured to receive a PDU session establishment success message
  • the sending unit is further configured to: after the receiving unit receives the PDU session establishment success message, send the PDU session establishment success message to the user equipment;
  • the session establishing unit is configured to establish an access session with the user equipment, where the access session is an access session related to the PDU session.
  • the access session includes:
  • the NAS message is encapsulated in an NAS message identifier, and the NAS message identifier is used to identify the NAS message.
  • the session establishing unit is further configured to establish a PPPoE session between the user equipment and the AGF before the receiving unit receives the non-access stratum NAS message sent by the user equipment.
  • the receiving unit configured to receive the non-access stratum NAS message sent by the user equipment, includes: receiving the NAS message encapsulated in the PPPoE session, where the PPPoE session identifier is the NAS message identifier;
  • the receiving unit configured to receive the non-access stratum NAS message sent by the user equipment, includes: receiving any one of the user equipment through a PPPoE discovery process, a network control protocol IPCP process, and a link control protocol LCP process. Message to the NAS message sent by the AGF.
  • the PDU session establishment request message further includes a session identifier, where the session identifier is identifier information of the access session related to the PDU session.
  • the session establishing unit configured to establish an access session with the user equipment, includes:
  • a PPPoE message or an access session message that is sent by the user equipment, where the PPPoE message is used to establish a PPPoE session; and the PPPoE session is bound to a PDU session corresponding to the session identifier.
  • the access session message is used to establish an access session, and the access session is bound to a PDU session corresponding to the session identifier.
  • the session identifier includes: a MAC address of the AGF, an Internet Protocol IP address of the AGF, a virtual local area network VLAN tag, a GRE tunnel identity, a multi-protocol label switching MPLS label, a PPPoE session identifier, and a user. At least one of a MAC address of the device and an internet protocol IP address of the user device.
  • the sending unit is further configured to send, by using a PPPoE message, the Internet Protocol IP address of the user equipment that is received by the received SMF to the user equipment.
  • the receiving unit is further configured to receive a data packet of a PDU session sent by the user equipment, where the data packet carries a session identifier;
  • the sending unit is further configured to send the data packet to a PDU session corresponding to the session identifier.
  • the receiving unit is further configured to: after the access session is corresponding to the PDU session, receive a data packet sent by the user equipment;
  • the session establishing unit configured to determine, according to the PPPoE session identifier, the PDU session corresponding to the data packet, if the data packet is encapsulated into a PPPoE session identifier;
  • the session establishing unit is configured to use an IP address of the AGF or an Internet Protocol IP of the AGF. Determining, by the address, the PDU session corresponding to the data packet;
  • the session establishing unit is configured to determine, according to the VLAN tag or the multi-protocol label switching MPLS label, the data packet corresponding The PDU session;
  • the data packet is encapsulated into a GRE tunnel, where the session establishing unit is configured to determine, according to the GRE tunnel identifier, the PDU session corresponding to the data packet;
  • the session establishing unit configured to determine, according to the MAC address of the user equipment or the user equipment IP address, that the data packet is encapsulated into a MAC address of the user equipment or a user equipment Internet Protocol IP address.
  • the PDU session corresponding to the data packet.
  • the sixth embodiment of the present invention further provides a session management function device, including:
  • a receiving unit configured to receive a PDU session establishment request message, where the PDU session establishment request message is used to request to establish a PDU session;
  • An identifier obtaining unit configured to acquire a session identifier corresponding to the PDU session, where the session identifier is identifier information of an access session related to the PDU session;
  • a sending unit configured to send the session identifier to the access gateway function AGF or the user equipment.
  • the acquiring the session identifier corresponding to the PDU session, and sending the session identifier to the AGF or the user equipment includes:
  • the identifier obtaining unit is configured to receive the session identifier by the AGF, and the sending unit is configured to send a PDU session establishment success message to the user equipment, where the session is included in the PDU session establishment success message.
  • the identifier obtaining unit is configured to receive the session identifier that is allocated by the user equipment, and the sending unit is configured to send the SM information to the AGF, where the session identifier is included in the SM information.
  • the session identifier includes:
  • the MAC address of the AGF, the Internet Protocol IP address of the AGF, the virtual local area network VLAN tag, the GRE tunnel identity, the multi-protocol label switching MPLS label, the peer-to-peer protocol PPPoE session identifier on the Ethernet, the MAC address of the user equipment, and the user equipment At least one of the Internet Protocol IP addresses.
  • the sending unit configured to send the SM information to the AGF, includes: sending, to the AGF, SM information, where the SM information includes a virtual local area network VLAN tag, a GRE tunnel identifier, and multiple The protocol label exchanges at least one of an MPLS label, a PPPoE session identifier, or an Internet Protocol IP address of the user equipment or a MAC address of the user equipment.
  • the sending unit is further configured to send a PDU session establishment success message to the user equipment, where the PDU session establishment success message includes the MAC address of the AGF, and an AGF internet protocol. At least one of an IP address, a virtual local area network VLAN tag, a GRE tunnel identity, a multi-protocol label switching MPLS label, and a PPPoE session identifier.
  • an embodiment of the present invention further includes an electronic device, including: an input and output device, a processor, and a memory, wherein
  • An executable instruction is stored in the memory, and the processor executes the executable instruction to implement the method flow according to any one of the embodiments of the present invention.
  • the embodiment of the present invention further provides a computer storage medium, where the computer storage medium includes executable instructions, and in the case that the executable instructions are executed, implementing any one of the embodiments provided by the embodiments of the present invention. Method flow.
  • the embodiment of the present invention further provides a computer program product, where the computer program product includes executable instructions, and in the case that the executable instructions are executed, the method flow of any one of the embodiments provided by the embodiments of the present invention is implemented. .
  • FIG. 1 is a schematic structural diagram of a 5G system according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a system architecture including a 5G fusion core network according to an embodiment of the present invention
  • FIG. 3 is a schematic flow chart of a method according to an embodiment of the present invention.
  • FIG. 4 is a schematic flow chart of a method according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of an access network function device according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a session management function device according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • the UE includes a UE, a Radio Access Network (RNA), or an Access Network (AN), and a user plane function.
  • UPF Data Network
  • DN Data Network
  • AMF Access Management
  • SMF Policy Control Function
  • PCF Policy Control Function
  • AF Application Function
  • AUSF Authentication Server Function
  • UDM Unified Data Management
  • FIG. 2 is a schematic diagram of a system of a 5G convergence core network according to an embodiment of the present invention
  • the dotted frame portion is a next generation control plane network element function (Next Generation).
  • Control plane function (NG CP); Added fixed network AN on the access network side.
  • NG CP next generation control plane network element function
  • In the CPE position in addition to CPE, it can be UE, RG, FNRG, and wireless fidelity (wifi) access point.
  • Access Point, AP Access Point
  • BNG-UP Broadband Network Gateway-User plane function
  • the CPE and the RAN can communicate using the NR or Uu interface
  • FIG. 2 includes the PPPoE session and the packet data unit PDU session.
  • the CPE sending a registration request to the AMF.
  • the fixed network user plane is terminated in the AGF, and is independent of the fixed network and the 5G CN-UPF.
  • the AMF device, the SMF device, the UPF device, and the PCF device may be simply referred to as AMF, SMF, UPF, and PCF, respectively.
  • the following is a schematic diagram of a process for a user equipment to access a 5G CN through a fixed network, as shown in FIG. 3, based on the system of the 5G converged core network shown in FIG. 2 above.
  • the AGF is an upper aggregation point of the AN, and is deployed on the fixed network access network side, corresponding to the fixed network AN in FIG.
  • the PPPoE session establishment process establishes a PPPoE connection between the CPE and the AGF.
  • the authentication process can be set to be omitted.
  • the AGF allocates a PPPoE session ID to the CPE, and stores the PPPoE session ID as a non-access stratum NAS session of the CPE, that is, a PPPoE session dedicated to transmitting NAS messages.
  • the CPE sends a PADI message to the AGF.
  • the AGF returns a PPPoE Active Discovery Offer (PADO) message to the CPE.
  • PADO PPPoE Active Discovery Offer
  • the CPE sends a PPPoE active discovery request (PADR) message to the AGF.
  • PADR PPPoE active discovery request
  • the AGF returns a PPPoE active discovery session-confirmation (PADS) to the CPE, and carries the PPPoE session ID in the PADS message;
  • PADS PPPoE active discovery session-confirmation
  • the CPE sends a parameter request to the AGF (Parameters Request);
  • the AGF returns a parameter response (Parameters Respond) to the CPE.
  • a more detailed PPPoE session establishment process may be in accordance with the relevant protocol, which is not described in detail in this embodiment of the present invention.
  • the CPE initiates a registration procedure.
  • the CPE sends a registration request message to the AMF using the PPPoE session of the NAS, thereby initiating the registration process. That is, the CPE sends a registration request message to the AMF, and the registration request message is encapsulated in the first PPPoE session using the NAS message.
  • the NAS message may include a PPPoE session ID, or a Virtual Local Area Network (VLAN) ID or a special IP address.
  • VLAN Virtual Local Area Network
  • the AGF identifies the NAS message based on the PPPoE session ID described above, and then the AGF sends the NAS message to the AMF. Then the network side completes the CPE registration process.
  • the CPE triggers a PDU session establishment process based on the service requirement.
  • the CPE sends a PDU session establishment request message to the AGF.
  • the PDU session establishment request message includes parameters such as a PDU session ID and a type identifier.
  • the above PDU session establishment request message is sent to the AGF in the NAS message using the PPPoE session of the NAS.
  • the CPE may encapsulate the NAS message with the PPPoE session ID, the VLAN ID, or a special IP address or a special MAC address.
  • the PPPoE session ID or VLAN ID is encapsulated in the L2 header of the NAS message.
  • Other ways in which the AGF message can be used to identify the NAS message can achieve the same effect, and the embodiment of the present invention is not limited.
  • the AGF identifies the NAS message based on the PPPoE Session ID, and forwards the PDU session establishment request message to the AMF through the N2 interface.
  • the NAS message may also be identified based on the foregoing VLAN ID in this step.
  • the AGF acquires and stores the VLAN ID in the L2 message header.
  • the AMF forwards the foregoing PDU session establishment request message to the SMF through the N11 interface message.
  • the SMF forwards the foregoing PDU session establishment request message to the UPF by using an N4 interface message. Thereby the network side establishes a PDU session.
  • the two schemes (A) and (B) implement the AGF to allocate a specific AGF MAC address to the CPE, and establish a binding relationship between the AGF MAC address and the PDU session.
  • the scheme (A) is specifically as follows:
  • the SMF sends an N11 interface reply message, which includes a PDU session establishment accept message and a PDU session information.
  • the PDU session establishment success message may include: a QoS policy, a service continuity mode, and the like.
  • the PDU session information may include: a PDU session identifier, a QoS file, and core network tunnel identification information.
  • the SMF allocates the IP address of the CPE to the CPE, and sends the IP address of the CPE to the AGF through the AMF based on the type identifier. That is, the SMF carries the IP address of the CPE in the session management (SM) information and sends it to the AGF based on the type identifier.
  • SM session management
  • the AMF sends the PDU session establishment success message and the PDU session information received in step 306A to the AGF through the N2 interface, and the AGF sends a PDU session establishment success message to the CPE.
  • the AGF parses the PDU session information to obtain a PDU session identifier, and the AGF allocates a special AGF MAC address to the PDU session, and encapsulates the PDU session establishment success message by using the MAC address as the AGF source address.
  • the special AGF MAC address here is specifically that the AGF MAC address and the PDU session establish a binding relationship, which may also be referred to as a dedicated AGF MAC address.
  • the CPE may obtain the AGF MAC address corresponding to the PDU session from the L2 source MAC address of the PDU session establishment success message.
  • the CPE can store the correspondence between the PDU session identifier and the special AGF MAC address.
  • the AGF can obtain the PDU session identifier and the IP address of the CPE, and the AGF establishes a binding relationship between the PDU session ID and the CPE IP address. Subsequently, the AGF can identify its correspondence with the PDU session based on the CPE IP address.
  • the AGF can also set or update the previously stored VLAN ID.
  • the AGF carries the VLAN ID in the L2 header to send to the FAN or CPE.
  • the FAN or CPE stores the VLAN ID and the PDU session corresponding to the AGF.
  • the AGF setting VLAN ID may be the case where the VLAN ID is not set before the FAN; the AGF update VLAN ID is the previous VLAN ID.
  • the AGF may also store the core network side tunnel identification information in the PDU session information, and allocate the AGF's own tunnel identifier, that is, assign the AGF tunnel identifier. Then, the AGF sends the AGF tunnel identifier to the AMF through the N2 interface message.
  • the AMF forwards the AGF tunnel identifier to the SMF, and the SMF forwards the AGF tunnel identifier to the UPF for updating the tunnel information. This completes the user plane tunnel establishment process of UPF and AGF.
  • the SMF sends an N11 interface reply message, which includes PDU session information.
  • the PDU session information may include: a PDU session identifier, a QoS file, core network tunnel identification information, and the like.
  • the SMF can also assign an IP address to the CPE and then send it to the AGF.
  • the manner in which the SMF sends the CPE IP address to the AGF can be obtained based on the indication of the type identification.
  • the AMF sends the above PDU session information to the AGF.
  • the AGF allocates an AGF tunnel identity.
  • the AGF obtains the PDU session identifier in the PDU session information, and the AGF allocates a special AGF MAC address to the PDU session.
  • the AGF sends the assigned AGF tunnel identifier and the special AGF MAC address to the AMF, and the AMF forwards it to the SMF.
  • the AGF can also send the VLAN ID to the AMF, and then forward it to the SMF by the AMF.
  • the SMF sends the AGF tunnel identifier to the UPF for updating the tunnel information.
  • the SMF generates a PDU session establishment success message, and sends the message to the CPE through the AMF and the AGF.
  • the above PDU session establishment success message includes an AGF MAC address, and may also include a PDU session identifier.
  • the CPE obtains the AGF MAC address corresponding to the PDU session from the PDU session establishment success message.
  • the CPE stores the correspondence between the PDU session identifier and the AGF MAC address.
  • the AGF MAC address and the PDU session identifier are used to save the correspondence between the PDU session and the access session. Since the PDU session and the access session can be distinguished by using multiple identifiers, in this embodiment, An example is given in the description of the invention; therefore, there are many ways to save the correspondence between the PDU session and the access session, and details are not described herein again.
  • the SMF can also carry the corresponding relationship between the VLAN ID and the PDU session ID through the NAS message, and send the relationship to the CPE.
  • the CPE can store the correspondence between the VLAN ID and the PDU session.
  • the CPE initiates a PPPoE session establishment process, and the CPE encapsulates the PPPoE message by using at least one of a MAC address or a VLAN ID of the AGF corresponding to the PDU session.
  • the AGF completes the PPPoE session establishment process.
  • the AGF sends the previously received CPE IP address to the CPE through the PPPoE process.
  • the AGF identifies the PDU session corresponding to the PPPoE session based on the AGF MAC address, the VLAN ID, or the CPE IP address.
  • the AGF can index the data packet of the CPE to the corresponding PDU session based on at least one of the AGF MAC address, the VLAN ID, the CPE IP address, or the PPPoE session ID, and complete the forwarding of the PPPoE session data packet to the PDU session.
  • This scheme is also applicable to scenarios where multiple PPPoE sessions correspond to unique PDU sessions. In this scenario, the CPE repeats step 11 to establish a correspondence between multiple PPPoE sessions and PDU sessions.
  • the following is a schematic diagram of a process for a user equipment to access a 5G CN through a fixed network, as shown in FIG. 4, based on the system of the 5G converged core network shown in FIG. 2 above.
  • the AGF is an upper layer convergence point of the AN, and is deployed on the fixed network access network side, corresponding to the fixed network AN in FIG.
  • the CPE is registered to the network side, and the registration process may be in accordance with the relevant protocol, which is not described in detail in this embodiment of the present invention.
  • the CPE initiates a PPPoE session establishment process based on the service requirement.
  • the AGF allocates an all-zero IP address (0.0.0.0) to the CPE.
  • the AGF can also set a special server IP address as the NAS encapsulation purpose.
  • the IP address for example, the AGF sends the AMF IP address as the destination IP address of the NAS to the CPE through the PPPoE process.
  • the PPPoE session establishment process establishes a PPPoE connection between the CPE and the AGF.
  • the authentication process can be set to be omitted.
  • the CPE sends a PADI message to the AGF.
  • the AGF returns a PADO message to the CPE.
  • the CPE sends a PADR message to the AGF.
  • AGF returns PADS to CPE
  • the CPE sends a parameter request to the AGF (Parameters Request);
  • the AGF returns a parameter response (Parameters Respond) to the CPE, and the AMF IP address is carried in the parameter response.
  • a special IP address such as an AMF IP address, a non-all-zero predetermined IP address, or the like, may be used to identify the NAS message, so that the AGF can distinguish the NAS message.
  • the AGF needs to distinguish between NAS messages and data packets sent by the CPE to the AGF, where the data packets are sent to the UPF and the NAS messages are sent to the AMF.
  • the foregoing embodiment also uses a PPPoE session identifier to identify the NAS message, so that the AGF can identify the NAS message, and details are not described herein.
  • a more detailed PPPoE session establishment process may be in accordance with the relevant protocol, which is not described in detail in this embodiment of the present invention.
  • a PPPoE session was established after the completion of 01-06.
  • the CPE sends the PDU session establishment request message by using the foregoing PPPoE session, and the PPPoE session ID or the AMF IP address is carried in the PDU session establishment request message and sent to the AGF.
  • the CPE sends the PDU session establishment request message to the AGF by using the NAS message, that is, the CPE may encapsulate the PDU session establishment request message by using the IP address of the NAS, and send the message to the AGF.
  • the above PDF request message may include identification information for the AGF to identify the NAS message, such as a PPPoE session identifier, a PDU session identifier, and a special destination IP address, such as the AMF IP address as exemplified above.
  • identification information for the AGF to identify the NAS message such as a PPPoE session identifier, a PDU session identifier, and a special destination IP address, such as the AMF IP address as exemplified above.
  • the AGF identifies the NAS message, and sends the identified NAS message to the AMF through the N2 interface.
  • the NAS message specifically includes the foregoing PDU session establishment request message.
  • the AMF sends a PDU session establishment request message to the SMF through the N11 interface, and is used to establish a PDU session.
  • the process of establishing a PDU session may be in accordance with the relevant protocol, and is not described in this embodiment.
  • the SMF may allocate a CPE IP address to the CPE, and the SMF may store the correspondence between the CPE identifier, the PPPoE session ID, and the PDU session ID.
  • the SMF sends the SM information to the AMF through the N11 interface, where the message of the N11 interface may include the SM information and the PDU session establishment success message.
  • the SM information may include: a PDU session ID, a PPPoE session ID, and a QoS file.
  • the above CPE IP address may be included in the PDU session establishment success message.
  • the AMF sends the received message of the N11 interface to the AGF through the N2 interface.
  • the AGF parses the SM information, and obtains and stores a correspondence between the PPPoE session ID and the PDU session ID.
  • the AGF forwards the PDU session establishment success message to the CPE.
  • the CPE can parse the PDU session establishment success message to obtain the CPE IP address, thereby obtaining the IP address assigned by the SMF to the CPE, and the CPE replaces the previous use with the parsed IP address. All zero IP address.
  • the CPE sends a data packet of the PDU session.
  • the CPE encapsulates the data packet of the foregoing PDU session into the PPPoE session corresponding to the PDU session, that is, the foregoing data packet is encapsulated into the PPPoE session ID.
  • the AGF obtains the PPPoE session ID.
  • the AGF searches for the PDU session ID based on the correspondence between the stored PPPoE session ID and the PDU session ID.
  • the AGF sends the above data packet to the PDU session identified by the PDU session ID.
  • An embodiment of the present invention further provides a user equipment, as shown in FIG. 5, including:
  • the sending unit 501 is configured to send a non-access stratum NAS message to the access gateway function AGF, where the NAS message includes a PDU session establishment request message for requesting to establish a PDU session;
  • the receiving unit 502 is configured to receive a PDU session establishment success message returned by the network side device.
  • the session establishing unit 503 is configured to establish an access session with the AGF, where the access session is an access session related to the PDU session.
  • the access session includes:
  • the NAS message is encapsulated in an NAS message identifier, and the NAS message identifier is used to identify the NAS message.
  • the session establishing unit 503 is further configured to establish a PPPoE session between the user equipment and the AGF before the user equipment sends a non-access stratum NAS message to the AGF; the sending unit 501
  • the sending, by the AGF, the non-access stratum NAS message includes: encapsulating the NAS message in the PPPoE session, where the PPPoE session identifier is the NAS message identifier;
  • the sending unit 501 configured to send the non-access stratum NAS message to the AGF, to: send the message to the AGF by using any one of a PPPoE discovery process, a network control protocol IPCP process, and a link control protocol LCP process.
  • the PDU session establishment request message further includes a session identifier, where the session identifier is identifier information of the access session related to the PDU session.
  • the PDU session establishment success message includes the session identifier, where the session identifier is identifier information of an access session related to the PDU session; or the PDU session establishment success message is encapsulated in the session identifier.
  • the session identifier is identification information of an access session related to the PDU session.
  • the session identifier includes: a MAC address of the AGF, an Internet Protocol IP address of the AGF, a virtual local area network VLAN tag, a GRE tunnel identifier, a multi-protocol label switching MPLS label, a PPPoE session identifier, and a MAC of the user equipment. At least one of an address and an internet protocol IP address of the user equipment.
  • the session establishing unit 503, configured to establish an access session with the AGF includes: sending, by the sending unit 501, a PPPoE message or an access session message that includes the session identifier to the AGF, where The PPPoE message is used to establish a PPPoE session, and the PPPoE session is bound to a PDU session corresponding to the session identifier; the access session message is used to request to establish an access session, and the access session and the session identifier are used. Corresponding PDU session binding.
  • the sending unit 501 is further configured to send a data packet of the PDU session, and encapsulate the data packet by using a session identifier corresponding to the PDU session.
  • the user equipment further includes:
  • the encapsulating unit 504 is configured to determine a PPPoE session identifier corresponding to the PDU session, and encapsulate the data packet of the PDU session into the PPPoE session identifier and send the data to the AGF.
  • the GRE tunnel identifier corresponding to the PDU session corresponding to the PDU session is determined, and the data packet of the PDU session is encapsulated into the GRE tunnel and sent to the AGF;
  • the user equipment MAC address corresponding to the PDU session is determined, and the data packet of the PDU session is encapsulated into the user equipment MAC address and sent to the AGF.
  • the NAS message is encapsulated in a layer 2 data packet, where the NAS message identifier includes: a virtual local area network VLAN tag, or a MAC address of the AGF, or an Ethernet type;
  • the NAS message is encapsulated in a layer 3 data packet, where the NAS message identifier includes: a user datagram protocol UDP port number, or a predetermined destination IP address;
  • the NAS message is encapsulated in a PPPoE session, and the NAS message identifier includes: the PPPoE session identifier;
  • the NAS message is encapsulated in a GRE tunnel, and the NAS message identifier includes: an identifier of the GRE tunnel;
  • the NAS message is encapsulated in an Extensible Authentication Protocol EAP message, where the NAS message identifier includes: the EAP parameter type;
  • the NAS message is encapsulated in a predetermined protocol layer, and the NAS message identifier includes: the predetermined protocol layer.
  • An embodiment of the present invention further provides an access gateway function device, as shown in FIG. 6, including:
  • the receiving unit 601 is configured to receive a non-access stratum NAS message sent by the user equipment, where the NAS message includes a PDU session establishment request message for requesting to establish a PDU session;
  • the sending unit 602 is configured to send the NAS message to the mobility management function AMF;
  • the receiving unit 601 is further configured to receive a PDU session establishment success message
  • the sending unit 602 is further configured to: after the receiving unit 601 receives the PDU session establishment success message, send the PDU session establishment success message to the user equipment;
  • the session establishing unit 603 is configured to establish an access session with the user equipment, where the access session is an access session related to the PDU session.
  • the access session includes:
  • the NAS message is encapsulated in an NAS message identifier, and the NAS message identifier is used to identify the NAS message.
  • the session establishing unit 603 is further configured to establish a PPPoE session between the user equipment and the AGF before the receiving unit 601 receives the non-access stratum NAS message sent by the user equipment;
  • the unit 601, configured to receive the non-access stratum NAS message sent by the user equipment includes: receiving the NAS message encapsulated in the PPPoE session, where the PPPoE session identifier is the NAS message identifier;
  • the receiving unit 601 configured to receive the non-access stratum NAS message sent by the user equipment, includes: receiving any one of the user equipment through a PPPoE discovery process, a network control protocol IPCP process, and a link control protocol LCP process.
  • the NAS message sent by the item to the AGF includes: receiving any one of the user equipment through a PPPoE discovery process, a network control protocol IPCP process, and a link control protocol LCP process.
  • the PDU session establishment request message further includes a session identifier, where the session identifier is identifier information of the access session related to the PDU session.
  • the receiving unit 601 is further configured to receive PDU session information sent by the SMF;
  • the sending unit 602 is further configured to send the session identifier to the SMF, and the SMF sends the session identifier to the user equipment in a PDU session establishment success message;
  • the receiving unit 601 is configured to receive a PDU session establishment success message sent by the SMF, where the AGF allocates a session identifier to the PDU session;
  • the sending unit 602 is further configured to encapsulate the PDU session establishment success message in the session identifier and send the message to the user equipment.
  • the session establishing unit 603, configured to establish an access session with the user equipment includes:
  • a PPPoE message or an access session message that is sent by the user equipment, where the PPPoE message is used to establish a PPPoE session; the PPPoE session is a PDU session corresponding to the session identifier. Binding; the access session message is used to establish an access session, and the access session is bound to a PDU session corresponding to the session identifier.
  • the session identifier includes: a MAC address of the AGF, an Internet Protocol IP address of the AGF, a virtual local area network VLAN tag, a GRE tunnel identity, a multi-protocol label switching MPLS label, a PPPoE session identifier, a MAC address of the user equipment, and At least one of the Internet Protocol IP addresses of the user equipment.
  • the sending unit 602 is further configured to send, by using a PPPoE message, the Internet Protocol IP address of the user equipment that is received by the received SMF to the user equipment.
  • the receiving unit 601 is further configured to receive a data packet of the PDU session sent by the user equipment, where the data packet carries a session identifier;
  • the sending unit 602 is further configured to send the data packet to a PDU session corresponding to the session identifier.
  • the receiving unit 601 is further configured to: after the access session is corresponding to the PDU session, receive a data packet sent by the user equipment;
  • the session establishing unit 603 is configured to determine, according to the PPPoE session identifier, the PDU session corresponding to the data packet.
  • the session establishing unit 603 is configured to use the MAC address of the AGF or the Internet protocol of the AGF.
  • the IP address determines the PDU session corresponding to the data packet;
  • the session establishing unit 603 is configured to determine the data packet according to the VLAN tag or the multi-protocol label switching MPLS label.
  • the PDU session corresponds to the PDU session;
  • the session establishing unit 603 is configured to determine, according to the GRE tunnel identifier, the PDU session corresponding to the data packet;
  • the session establishing unit 603 is configured to determine, according to the MAC address of the user equipment or the user equipment IP address. Said PDU session corresponding to the data packet.
  • the embodiment of the invention further provides a session management function device, as shown in FIG. 7, comprising:
  • the receiving unit 701 is configured to receive a PDU session establishment request message, where the PDU session establishment request message is used to request to establish a PDU session.
  • An identifier obtaining unit 702 configured to acquire a session identifier corresponding to the PDU session, where the session identifier is identifier information of an access session related to the PDU session;
  • the sending unit 703 is configured to send the session identifier to the access gateway function AGF or the user equipment.
  • the acquiring the session identifier corresponding to the PDU session, and sending the session identifier to the AGF or the user equipment includes:
  • the identifier obtaining unit 702 is configured to receive the session identifier by the AGF, and the sending unit 703 is configured to send a PDU session establishment success message to the user equipment, where the PDU session establishment success message is included.
  • the identifier obtaining unit 702 is configured to receive the session identifier that is allocated by the user equipment, where the sending unit 703 is configured to send the SM information to the AGF, where the SM identifier is included in the SM information. .
  • the session identifier includes:
  • the MAC address of the AGF, the Internet Protocol IP address of the AGF, the virtual local area network VLAN tag, the GRE tunnel identity, the multi-protocol label switching MPLS label, the peer-to-peer protocol PPPoE session identifier on the Ethernet, the MAC address of the user equipment, and the user equipment At least one of the Internet Protocol IP addresses.
  • the sending unit 703, configured to send the SM information to the AGF includes: sending, to the AGF, SM information, where the SM information includes a virtual local area network VLAN tag, a GRE tunnel identifier, and a multi-protocol label switching MPLS.
  • the sending unit 703 is further configured to send a PDU session establishment success message to the user equipment, where the PDU session establishment success message includes the MAC address of the AGF, an Internet Protocol IP address of the AGF, and a virtual local area network. At least one of a VLAN tag, a GRE tunnel identity, a multi-protocol label switching MPLS label, and a PPPoE session identifier.
  • FIG. 8 is an electronic device 80 according to an embodiment of the present invention.
  • the electronic device 80 includes a processor 801, a memory 802, and a transceiver 803.
  • the processor 801, the memory 802, and the transceiver 803 can pass.
  • the buses are connected to each other.
  • the memory 802 includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), an Erasable Programmable Read Only Memory (EPROM), or A Compact Disc Read-Only Memory (CD-ROM) for storing related instructions and data.
  • the transceiver 803 is configured to receive and transmit data. Therefore, in this embodiment, the transceiver 803 may correspond to the transmitting unit and the receiving unit in the foregoing embodiments, and the functions of other units may correspond to the functions of the processor 801.
  • the processor 801 may be one or more central processing units (CPUs). In the case where the processor 801 is a CPU, the CPU may be a single core CPU or a multi-core CPU.
  • CPUs central processing units
  • the processor 801 in the device 80 is configured to read the program code stored in the memory 802, and perform the steps in the foregoing method embodiment or the method in the invention, and details are not described herein again.
  • the electronic device may be a user device, an AGF, an AMF or the like related to the embodiment of the present invention, depending on the specific content executed by the electronic device.
  • the user equipment can be any user equipment including a mobile phone, a tablet computer, a PDA (Personal Digital Assistant), a POS (Point of Sales), a car computer, and the like:
  • FIG. 9 is a block diagram showing a partial structure of a mobile phone related to a user equipment provided by an embodiment of the present invention.
  • the mobile phone includes: a radio frequency (RF) circuit 910, a memory 920, an input unit 930, a display unit 940, a sensor 950, an audio circuit 960, a wireless fidelity (WiFi) module 970, and a processor 980. And power supply 990 and other components.
  • RF radio frequency
  • the RF circuit 910 can be used for receiving and transmitting signals during the transmission or reception of information or during a call. Specifically, after receiving the downlink information of the base station, it is processed by the processor 980. In addition, the uplink data is designed to be sent to the base station. Generally, RF circuit 910 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like. In addition, RF circuitry 910 can also communicate with the network and other devices via wireless communication. The above wireless communication may use any communication standard or protocol, including but not limited to Global System of Mobile communication (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (Code Division). Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), E-mail, Short Messaging Service (SMS), and the like.
  • GSM Global System of Mobile communication
  • GPRS General Packet Radio Service
  • the memory 920 can be used to store software programs and modules, and the processor 980 executes various functional applications and data processing of the mobile phone by running software programs and modules stored in the memory 920.
  • the memory 920 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may be stored according to Data created by the use of the mobile phone (such as audio data, phone book, etc.).
  • memory 920 can include high speed random access memory, and can also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
  • the input unit 930 can be configured to receive input numeric or character information and to generate key signal inputs related to user settings and function controls of the handset.
  • the input unit 930 may include a touch panel 931 and other input devices 932.
  • the touch panel 931 also referred to as a touch screen, can collect touch operations on or near the user (such as a user using a finger, a stylus, or the like on the touch panel 931 or near the touch panel 931. Operation), and drive the corresponding connecting device according to a preset program.
  • the touch panel 931 may include two parts of a touch detection device and a touch controller.
  • the touch detection device detects the touch orientation of the user, and detects a signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts the touch information into contact coordinates, and sends the touch information.
  • the processor 980 is provided and can receive commands from the processor 980 and execute them.
  • the touch panel 931 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic waves.
  • the input unit 930 may also include other input devices 932.
  • other input devices 932 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control buttons, switch buttons, etc.), trackballs, mice, joysticks, and the like.
  • the display unit 940 can be used to display information input by the user or information provided to the user as well as various menus of the mobile phone.
  • the display unit 940 can include a display panel 941.
  • the display panel 941 can be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.
  • the touch panel 931 can cover the display panel 941. When the touch panel 931 detects a touch operation on or near it, the touch panel 931 transmits to the processor 980 to determine the type of the touch event, and then the processor 980 according to the touch event. The type provides a corresponding visual output on display panel 941.
  • touch panel 931 and the display panel 941 are used as two independent components to implement the input and input functions of the mobile phone in FIG. 9, in some embodiments, the touch panel 931 and the display panel 941 may be integrated. Realize the input and output functions of the phone.
  • the handset may also include at least one type of sensor 950, such as a light sensor, motion sensor, and other sensors.
  • the light sensor may include an ambient light sensor and a proximity sensor, wherein the ambient light sensor may adjust the brightness of the display panel 941 according to the brightness of the ambient light, and the proximity sensor may close the display panel 941 and/or when the mobile phone moves to the ear. Or backlight.
  • the accelerometer sensor can detect the magnitude of acceleration in all directions (usually three axes). When it is stationary, it can detect the magnitude and direction of gravity.
  • the mobile phone can be used to identify the gesture of the mobile phone (such as horizontal and vertical screen switching, related Game, magnetometer attitude calibration), vibration recognition related functions (such as pedometer, tapping), etc.; as for the mobile phone can also be configured with gyroscopes, barometers, hygrometers, thermometers, infrared sensors and other sensors, no longer Narration.
  • the gesture of the mobile phone such as horizontal and vertical screen switching, related Game, magnetometer attitude calibration
  • vibration recognition related functions such as pedometer, tapping
  • the mobile phone can also be configured with gyroscopes, barometers, hygrometers, thermometers, infrared sensors and other sensors, no longer Narration.
  • An audio circuit 960, a speaker 961, and a microphone 962 can provide an audio interface between the user and the handset.
  • the audio circuit 960 can transmit the converted electrical data of the received audio data to the speaker 961, and convert it into a sound signal output by the speaker 961.
  • the microphone 962 converts the collected sound signal into an electrical signal, and the audio circuit 960 After receiving, it is converted into audio data, and then processed by the audio data output processor 980, sent to the other mobile phone via the RF circuit 910, or outputted to the memory 920 for further processing.
  • WiFi is a short-range wireless transmission technology
  • the mobile phone can help users to send and receive emails, browse web pages, and access streaming media through the WiFi module 970, which provides users with wireless broadband Internet access.
  • FIG. 9 shows the WiFi module 970, it can be understood that it does not belong to the essential configuration of the mobile phone, and can be omitted as needed within the scope of not changing the essence of the invention.
  • the processor 980 is the control center of the handset, which connects various portions of the entire handset using various interfaces and lines, by executing or executing software programs and/or modules stored in the memory 920, and invoking data stored in the memory 920, executing The phone's various functions and processing data, so that the overall monitoring of the phone.
  • the processor 980 may include one or more processing units; preferably, the processor 980 may integrate an application processor and a modem processor, where the application processor mainly processes an operating system, a user interface, an application, and the like.
  • the modem processor primarily handles wireless communications. It will be appreciated that the above described modem processor may also not be integrated into the processor 980.
  • the handset also includes a power source 990 (such as a battery) that supplies power to the various components.
  • a power source 990 such as a battery
  • the power source can be logically coupled to the processor 980 through a power management system to manage functions such as charging, discharging, and power management through the power management system.
  • the mobile phone may further include a camera, a Bluetooth module, and the like, and details are not described herein again.
  • the processor 980 included in the user equipment has the function corresponding to the processor 801 of the foregoing embodiment, and the RF circuit 910 and the WiFi module 970 can correspond to the functions of the sending unit and the receiving unit of the user equipment.
  • the RF circuit 910 and the WiFi module 970 can correspond to the functions of the sending unit and the receiving unit of the user equipment.
  • the embodiment of the present invention further provides a computer program product, which comprises executable instructions, and in the case that the executable instructions are executed, implements a method flow of any one of the embodiments provided by the embodiments of the present invention.
  • the embodiment of the present invention further provides a computer storage medium, wherein the computer storage medium includes executable instructions, and in the case that the executable instructions are executed, the method flow of any one of the embodiments of the present invention is implemented.
  • the computer storage medium includes executable instructions, and in the case that the executable instructions are executed, the method flow of any one of the embodiments of the present invention is implemented.
  • One of ordinary skill in the art can understand all or part of the process of implementing the above embodiments, which can be completed by a computer program to instruct related hardware, the program can be stored in a computer readable storage medium, when the program is executed The flow of the method embodiments as described above may be included.
  • the foregoing storage medium includes various media that can store program codes, such as a ROM or a random access memory RAM, a magnetic disk, or an optical disk.

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Abstract

本发明实施例公开了会话管理方法、及装置，其中方法包括：用户设备向AGF发送NAS消息，所述NAS消息包含用于请求建立PDU会话的PDU会话建立请求消息,所述用户设备接收网络侧设备返回的PDU会话建立成功消息；所述用户设备与所述AGF之间建立接入会话，所述接入会话为所述PDU会话相关的接入会话。用户设备发送NAS消息建立PDU会话，与AGF建立接入会话，由于接入会话与PDU会话相关，那么用户设备能够将PDU会话对应到接入会话，实现了用户设备通过固网接入到5G CN的目的。

Description

会话管理方法、及装置
本申请要求于2017年6月20日提交中国专利局、申请号为201710471482.2、发明名称为“会话管理方法、及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域，尤其涉及一种会话管理方法、及装置。
背景技术
用户设备(User Equipment，UE)也称为用户终端设备(Customer Premises Equipment，CPE)，在本申请文件中除了指代用户直接操作的硬件实体外，还包括在用户一侧的硬件实体，例如：家庭网关(Residential Gateway，RG)、固网住宅网关(fixed Network Residential Gateway，FNRG)等。
为了应对无线宽带技术的挑战，保持第三代移动通信伙伴项目(Third Generation Partnership Project，3GPP)网络的领先优势，3GPP标准组制定了下一代移动通信网络架构(Next Generation System，NGS)，称为5G网络架构。5G网络架构不但支持采用3GPP标准组定义的无线技术接入5G核心网(Core network，CN)，而且支持采用非3GPP(non-3GPP)接入技术通过non-3GPP转换功能(non-3GPP Interworking Function，N3IWF)或下一代接入网关(next Generation packet data Gateway，ngPDG)接入5G核心网。3GPP标准组定义的无线技术包括：长期演进(Long Term Evolution，LTE)，5G无线接入网(Radio Access Network，RAN)等。
5G核心网的功能分为用户面功能(User plane function，UPF)设备和控制面功能(Control plane function，CPF)设备。用户面网元主要负责分组数据包的转发、服务质量(Quality of Service，QoS)控制、计费信息统计等。控制面网元主要负责用户注册认证、移动性管理及向UPF下发数据包转发策略、QoS控制策略等，可进一步细分为移动性管理功能(Core Access and Mobility Management Function，AMF)设备与会话管理功能(Session Management Function，SMF)设备。具体的，AMF负责用户设备接入时的注册流程及用户设备移动过程中的位置管理。SMF负责用户设备发起业务时网络侧建立相应的会话连接，为用户设备提供具体服务，尤其是基于SMF与UPF之间的NG4接口向UPF下发数据包转发策略、QoS策略等。
目前，用户设备发起会话建立有两种形式分别为：通过固网发起接入到固网建立会话、通过移动网络发起接入到移动网络建立会话。目前5G CN并不支持用户设备通过固网接入到5G CN。
发明内容
本发明实施例所要解决的技术问题在于，提供会话管理方法、及装置，实现用户设备通过固网接入到5G CN，在本申请中称为5G融合核心网。
一方面，本发明实施例提供了一种会话管理方法，包括：
用户设备向接入网关功能(Access Gateway Function，AGF)发送非接入层(Non Access Stratum，NAS)消息，所述NAS消息包含用于请求建立分组数据单元(packet data unit，PDU)会话的PDU会话建立请求消息,所述用户设备接收网络侧设备返回的PDU会话建立成功消息；
所述用户设备与所述AGF之间建立接入会话，所述接入会话为所述PDU会话相关的接入会话。
在本实施例中，用户设备发送NAS消息建立PDU会话，与AGF建立接入会话，由于接入会话与PDU会话相关，那么用户设备能够将PDU会话对应到接入会话，实现了用户设备通过固网接入到5G CN的目的。
在一个可选的实现方式中，还提供了接入会话的几种具体的形式，如下：所述接入会话包括：
以太网上的点对点协议(Point-to-Point Protocol Over Ethernet，PPPoE)会话，或，层2(Layer 2，L2)以太网会话，或层3(Layer 3，L3)互联网协议会话，或，通用路由封装(Generic Routing Encapsulation，GRE)隧道。
上述L2为数据链路层(data link later)，L3为网络层(network Layer)。
在一个可选的实现方式中，还提供了AGF识别NAS的实现方案，具体如下：所述NAS消息封装在NAS消息标识中，所述NAS消息标识用于标识所述NAS消息。
上述NAS消息标识可以是任意的能够被AGF所识别的信息，该NAS消息标识在用户设备和AGF之间约定用于区分NAS消息和用户面数据。
在一个可选的实现方式中，还提供了发送NAS消息的两种可选的实现方案，如下：在所述用户设备向AGF发送非接入层NAS消息之前，所述方法还包括：建立所述用户设备与所述AGF之间的PPPoE会话；所述用户设备向AGF发送非接入层NAS消息包括：用户设备将所述NAS消息封装在所述PPPoE会话中，所述PPPoE会话标识为所述NAS消息标识；
或者，所述用户设备向AGF发送非接入层NAS消息包括：通过PPPoE的发现过程、网络网络控制协议(Internet Protocol Control Protocol，IPCP)过程以及链路控制协议(Link Control Protocol，LCP)过程中的任意一项的消息向所述AGF发送的所述NAS消息。
以上两种可选的实现方式中，前一种首先建立了PPPoE会话用来传输NAS消息，此时可以使用PPPoE会话本身来让AGF知道发送的是NAS消息，因此可以不用新增标识信息。后一种实现方式则提供了发送NAS消息的几种应用场景。
在一个可选的实现方式中，还提供了让AGF知道PDU会话与哪一个接入会话是相关的实现方案，具体如下：所述PDU会话建立请求消息中还包含会话标识，所述会话标识为所述PDU会话相关的所述接入会话的标识信息。
上述会话标识可以是任意的在AGF和PDU之间约定的用来标识该PDU会话与哪一个接入会话相关。由于PDU会话建立请求，用于请求建立PDU会话，那么该会话标识可以是任意能够标识接入会话或者对应到接入会话或者对应到用户设备的标识。
在一个可选的实现方式中，所述方法还包括：所述AGF接收所述SMF发送的PDU会话信息；所述AGF为所述PDU会话分配会话标识；所述AGF将所述会话标识发送给所述SMF， SMF将所述会话标识携带在PDU会话建立成功消息中发送给所述用户设备；
或者，所述AGF接收所述SMF发送的PDU会话建立成功消息，所述AGF为所述PDU会话分配会话标识；所述AGF将PDU会话建立成功消息封装在上述会话标识中发送给用户设备。
在一个可选的实现方式中，还提供了网络侧的设备，例如：AGF告知用户设备新建的PDU会话与哪一个接入会话相关，具体如下：所述PDU会话建立成功消息中包含所述会话标识，所述会话标识为所述PDU会话相关的接入会话的标识信息；或者，所述PDU会话建立成功消息封装在会话标识中，所述会话标识为所述PDU会话相关的接入会话的标识信息。
在上述会话建立成功消息中包含的会话标识可以是任意能够标识接入会话或者对应到接入会话或者对应到用户设备的标识信息。
在一个可选的实现方式中，还提供了上述会话标识的几种可选的实现方案，如下：所述会话标识包括：所述AGF的MAC地址、所述AGF的互联网协议IP地址、虚拟局域网VLAN标签、GRE隧道标识、多协议标签交换(Multi-Protocol Label Switching，MPLS)标签、PPPoE会话标识、用户设备的MAC地址以及所述用户设备的互联网协议IP地址中的至少一项。
在一个可选的实现方式中，还提供了用户设备与AGF之间建立接入会话的具体实现方案，如下：所述用户设备与所述AGF之间建立接入会话包括：
所述用户设备向所述AGF发送包含所述会话标识的PPPoE消息或接入会话消息，所述PPPoE消息用于建立PPPoE会话，所述PPPoE会话与所述会话标识对应的PDU会话绑定；所述接入会话消息用于请求建立接入会话，所述接入会话与所述会话标识对应的PDU会话绑定。
在本实施例中，绑定可以认为是获得或保存了接入会话与会话标识对应的PDU会话之间的对应关系，这种对应关系可以通过某些例如：表格或者其他数据结构来存储。
上述PPPoE消息是用于建立PPPoE会话的消息，包括：PPPoE发起(PPPoE Active Discovery Initiation，PADI)，PPPoE发现(PPPoE Active Discovery Offer，PADO)，PPPoE请求(PPPoE Active Discovery Request，PADR)，PPPoE确认(PPPoE Active Discovery Session-confirmation，PADS)，PPPoE终止(PPPoE Active Discovery Terminate，PADT),链路控制协议(Link Control Protocol，LCP)，互联网联系控制协议(Internet Protocol Control Protocol，IPCP)消息。该消息可以通过用户面来发送，或者使用NAS请求消息内包含的PPPoE消息来发送。
在一个可选的实现方式中，还提供了在PDU会话和接入会话建立后，进行数据发送的方案，如下：所述方法还包括：
所述用户设备发送PDU会话的数据包，使用所述PDU会话对应的会话标识封装所述数据包。
由于使用会话标识封装数据包，因此AGF能够获知该数据包是哪一个PDU会话的数据包，从而继续后续数据包的转发和处理流程。
在一个可选的实现方式中，还提供了PDU会话对应的数据包的具体封装方式，具体如下：所述方法还包括：
所述用户设备确定所述PDU会话对应的PPPoE会话标识，将所述PDU会话的数据包封装到所述PPPoE会话标识中发送给所述AGF；
或者，所述用户设备确定所述PDU会话对应的所述AGF的MAC地址或所述AGF的互联网协议IP地址，将所述PDU会话的数据包封装到所述AGF的MAC地址或所述AGF的互联网协议IP地址中发送给所述AGF；
或者，所述用户设备确定所述PDU会话对应的虚拟无线局域网VLAN标签，多协议标签交换MPLS标签、将所述PDU会话的数据包封装到所述VLAN标签中发送给所述AGF；
或者，所述用户设备确定所述PDU会话对应的GRE隧道标识，将所述PDU会话的数据包封装到所述GRE隧道中发送给所述AGF；
或者，所述用户设备确定所述PDU会话对应的用户设备MAC地址，将所述PDU会话的数据包封装到所述用户设备MAC地址中发送给所述AGF。
在一个可选的实现方式中，还提供了NAS消息标识的可选实现方案具体如下：所述NAS消息封装在层2数据包中，所述NAS消息标识包括：虚拟局域网VLAN标签，或，AGF的MAC地址，或，以太网类型；
或者，所述NAS消息封装在层3数据包中，所述NAS消息标识包括：用户数据报协议UDP端口号，或，预定目的IP地址；
或者，若建立所述PPPoE会话，所述NAS消息封装在PPPoE会话中，所述NAS消息标识包括：所述PPPoE会话标识；
或者，若建立所述GRE隧道，所述NAS消息封装在GRE隧道中，所述NAS消息标识包括：所述GRE隧道的标识；
或者，所述NAS消息封装在可扩展认证协议EAP消息中，所述NAS消息标识包括：所述EAP参数类型；
或者，所述NAS消息封装在预定协议层中，所述NAS消息标识包括：所述预定协议层。
二方面，本发明实施例还提供了一种会话管理方法，包括：
接入网关功能AGF接收用户设备发送的非接入层NAS消息，所述NAS消息包含用于请求建立PDU会话的PDU会话建立请求消息；
所述AGF将所述NAS消息发送给移动性管理功能AMF；所述AGF在接收到PDU会话建立成功消息后，将所述PDU会话建立成功消息发送给所述用户设备；
所述AGF与所述用户设备之间建立接入会话，所述接入会话为所述PDU会话相关的接入会话。
在AGF一侧，已知用户设备建立的PDU会话，以及AGF与用户设备之间的接入会话，这样可以将接入会话和PDU会话建立关联关系，实现了用户设备通过固网接入到5G CN的目的。
在一个可选的实现方式中，还提供了接入会话的几种可能的情况，具体如下：所述接入会话包括：
以太网上的点对点协议PPPoE会话，或，L2以太网会话，或，L3互联网协议会话，或，通用路由封装GRE隧道。
在一个可选的实现方式中，还提供了NAS的封装方式，具体如下：所述NAS消息封装 在NAS消息标识中，所述NAS消息标识用于标识所述NAS消息。
在本实施例中，NAS消息被封装到了NAS消息标识中，那么AGF在收到该NAS消息后可以据此区分出NAS消息。
在一个可选的实现方式中，还提供了接受NAS的可选实现方案，具体如下：在所述接入网关功能AGF接收用户设备发送的非接入层NAS消息之前，所述方法还包括：建立所述用户设备与所述AGF之间的PPPoE会话；所述接入网关功能AGF接收用户设备发送的非接入层NAS消息包括：接收封装在所述PPPoE会话中的所述NAS消息，所述PPPoE会话标识为所述NAS消息标识；
或者，所述接入网关功能AGF接收用户设备发送的非接入层NAS消息包括：接收所述用户设备通过PPPoE的发现过程、网络控制协议IPCP过程以及链路控制协议LCP过程中的任意一项的消息向所述AGF发送的所述NAS消息。
以上两种可选的实现方式中，前一种首先建立了PPPoE会话用来传输NAS消息，此时可以使用PPPoE会话本身来让AGF知道发送的是NAS消息，因此可以不用新增标识信息。后一种实现方式则提供了发送NAS消息的几种应用场景。
在一个可选的实现方式中，还提供了PDU会话建立请求消息的具体发送方案，如下：所述PDU会话建立请求消息中还包含会话标识，所述会话标识为所述PDU会话相关的所述接入会话的标识信息。
在本实施例中，使用PDU会话建立请求消息来携带会话标识，这样AGF可以依据会话标识确定哪一个接入会话与请求建立的PDU会话相关。
在一个可选的实现方式中，还提供了用户设备与AGF之间建立接入会话的具体实现方案，如下：所述AGF与所述用户设备之间建立接入会话包括：
所述AGF接收所述用户设备发送的包含所述会话标识的PPPoE消息或接入会话消息，所述PPPoE消息用于建立PPPoE会话；所述PPPoE会话与所述会话标识对应的PDU会话绑定；所述接入会话消息用于建立接入会话，所述接入会话与所述会话标识对应的PDU会话绑定。
在本实施例中，绑定可以认为是获得或保存了接入会话与会话标识对应的PDU会话之间的对应关系，这种对应关系可以通过某些例如：表格或者其他数据结构来存储。
在一个可选的实现方式中，还提供了会话标识的几种可能的实现方案，如下：所述会话标识包括：所述AGF的MAC地址、AGF的互联网协议IP地址、虚拟局域网VLAN标签、GRE隧道标识、多协议标签交换MPLS标签、PPPoE会话标识、用户设备的MAC地址以及所述用户设备的互联网协议IP地址中的至少一项。
进一步地，所述方法还包括：
所述AGF将收到的SMF分配的所述用户设备的互联网协议IP地址通过PPPoE消息发送给所述用户设备。
在一个可选的实现方式中，还提供了在PDU会话和接入会话建立后，进行数据传输的实现方案，具体如下：所述方法还包括：
接收所述用户设备发送的PDU会话的数据包，所述数据包中携带会话标识；
将所述数据包发送给会话标识对应的PDU会话。
由于会话标识可以告知AGF该数据包对应到了哪一个PDU会话，那么AGF可以据此转发数据包。
在一个可选的实现方式中，还提供了数据包的具体封装方案，如下：在所述将所述接入会话对应到所述PDU会话之后，所述方法还包括：
接收所述用户设备发送的数据包；
所述数据包被封装到PPPoE会话标识中，依据所述PPPoE会话标识确定所述数据包对应的所述PDU会话；
或者，所述数据包被封装到所述AGF的MAC地址或所述AGF的互联网协议IP地址中，依据所述AGF的MAC地址或所述AGF的互联网协议IP地址确定所述数据包对应的所述PDU会话；
或者，所述数据包被封装到虚拟无线局域网VLAN标签或多协议标签交换MPLS标签中，依据所述VLAN标签或多协议标签交换MPLS标签确定所述数据包对应的所述PDU会话；
或者，所述数据包被封装到GRE隧道中，依据所述GRE隧道标识确定所述数据包对应的所述PDU会话；
或者，所述数据包被封装到所述用户设备的MAC地址或用户设备互联网协议IP地址中，依据所述用户设备的MAC地址或用户设备IP地址确定所述数据包对应的所述PDU会话。
三方面本发明实施例还提供了一种会话管理方法，包括：
会话管理功能SMF接收PDU会话建立请求消息，所述PDU会话建立请求消息用于请求建立PDU会话；
所述SMF获取所述PDU会话对应的会话标识，并将所述会话标识发送给接入网关功能AGF或用户设备；所述会话标识为所述PDU会话相关的接入会话的标识信息。
在本实施例中，SMF为用户设备建立了PDU会话，并且获得了会话标识；告知AGF或用户设备后，可以指导用户设备和AGF后据此获知PDU会话对应到哪一个接入会话。
在一个可选的实现方式中，还提供了将会话标识发送给AGF或者用户设备的具体实现方案，如下：所述获取所述PDU会话对应的会话标识，并将所述会话标识发送给AGF或用户设备包括：
所述SMF收到所述AGF分配所述会话标识后，向所述用户设备发送PDU会话建立成功消息，在所述PDU会话建立成功消息中包含所述会话标识；
或者，所述SMF收到所述用户设备分配的所述会话标识后，向所述AGF发送SM信息，在所述SM信息中包含所述会话标识。
在一个可选的实现方式中，还提供了会话标识的可选实现方案，如下：所述会话标识包括：
所述AGF的MAC地址、AGF的互联网协议IP地址、虚拟局域网VLAN标签、GRE隧道标识、多协议标签交换MPLS标签、以太网上的点对点协议PPPoE会话标识、用户设备的MAC地址以及所述用户设备的互联网协议IP地址中的至少一项。
在一个可选的实现方式中，还提供了SMF发送SM信息给AGF告知会话标识的具体实现方案，如下：所述向所述AGF发送SM信息包括：
所述SMF向所述AGF发送SM信息，在所述SM信息中包含虚拟局域网VLAN标签、GRE隧道标识、多协议标签交换MPLS标签、PPPoE会话标识或所述用户设备的互联网协议IP地址或用户设备的MAC地址地址中的至少一个。
在一个可选的实现方式中，还提供了通过PDU会话建立成功消息告知会话标识给用户设备的具体实现方案，如下：所述方法还包括：
所述SMF向所述用户设备发送PDU会话建立成功消息，在所述PDU会话建立成功消息中包含所述AGF的MAC地址、AGF的互联网协议IP地址、虚拟局域网VLAN标签、GRE隧道标识、多协议标签交换MPLS标签以及PPPoE会话标识中的至少一个。
四方面，本发明实施例还提供了一种用户设备，包括：
发送单元，用于向接入网关功能AGF发送非接入层NAS消息，所述NAS消息包含用于请求建立PDU会话的PDU会话建立请求消息；
接收单元，用于接收网络侧设备返回的PDU会话建立成功消息；
会话建立单元，用于与所述AGF之间建立接入会话，所述接入会话为所述PDU会话相关的接入会话。
在一个可选的实现方式中，所述接入会话包括：
以太网上的点对点协议PPPoE会话，或，L2以太网会话，或，L3互联网协议会话，或，通用路由封装GRE隧道。
在一个可选的实现方式中，所述NAS消息封装在NAS消息标识中，所述NAS消息标识用于标识所述NAS消息。
在一个可选的实现方式中，所述会话建立单元，还用于在所述用户设备向AGF发送非接入层NAS消息之前，建立所述用户设备与所述AGF之间的PPPoE会话；所述发送单元，用于向AGF发送非接入层NAS消息包括：将所述NAS消息封装在所述PPPoE会话中，所述PPPoE会话标识为所述NAS消息标识；
或者，所述发送单元，用于向AGF发送非接入层NAS消息包括：通过PPPoE的发现过程、网络控制协议IPCP过程以及链路控制协议LCP过程中的任意一项的消息向所述AGF发送的所述NAS消息。
在一个可选的实现方式中，所述PDU会话建立请求消息中还包含会话标识，所述会话标识为所述PDU会话相关的所述接入会话的标识信息。
在一个可选的实现方式中，所述接收单元，还用于接收所述SMF发送的PDU会话信息；
所述发送单元；还用于将为所述PDU会话分配会话标识发送给所述SMF，SMF将所述会话标识携带在PDU会话建立成功消息中发送给所述用户设备；
或者，所述接收单元，还用于接收所述SMF发送的PDU会话建立成功消息，所述AGF为所述PDU会话分配会话标识；
所述发送单元，还用于将所述PDU会话建立成功消息封装在所述会话标识中发送给用户设备。
在一个可选的实现方式中，所述PDU会话建立成功消息中包含所述会话标识，所述会话标识为所述PDU会话相关的接入会话的标识信息；或者，所述PDU会话建立成功消息封装在会话标识中，所述会话标识为所述PDU会话相关的接入会话的标识信息。
在一个可选的实现方式中，所述会话标识包括：所述AGF的MAC地址、所述AGF的互联网协议IP地址、虚拟局域网VLAN标签、GRE隧道标识、多协议标签交换MPLS标签、PPPoE会话标识、用户设备的MAC地址以及所述用户设备的互联网协议IP地址中的至少一项。
在一个可选的实现方式中，所述会话建立单元，用于与所述AGF之间建立接入会话包括：通过所述发送单元向所述AGF发送包含所述会话标识的PPPoE消息或接入会话消息，所述PPPoE消息用于建立PPPoE会话，所述PPPoE会话与所述会话标识对应的PDU会话绑定；所述接入会话消息用于请求建立接入会话，所述接入会话与所述会话标识对应的PDU会话绑定。
在一个可选的实现方式中，所述发送单元，还用于发送PDU会话的数据包，使用所述PDU会话对应的会话标识封装所述数据包。
在一个可选的实现方式中，所述用户设备还包括：
封装单元，用于确定所述PDU会话对应的PPPoE会话标识，将所述PDU会话的数据包封装到所述PPPoE会话标识中发送给所述AGF；
或者，用于确定所述PDU会话对应的所述AGF的MAC地址或所述AGF的互联网协议IP地址，将所述PDU会话的数据包封装到所述AGF的MAC地址或所述AGF的互联网协议IP地址中发送给所述AGF；
或者，用于确定所述PDU会话对应的虚拟无线局域网VLAN标签或多协议标签交换MPLS标签，将所述PDU会话的数据包封装到所述VLAN标签或多协议标签交换MPLS标签中发送给所述AGF；
或者，用于确定所述PDU会话对应的用户设备MAC地址，将所述PDU会话的数据包封装到所述用户设备MAC地址中发送给所述AGF。
在一个可选的实现方式中，所述NAS消息封装在层2数据包中，所述NAS消息标识包括：虚拟局域网VLAN标签，或，AGF的MAC地址，或，以太网类型；
或者，所述NAS消息封装在层3数据包中，所述NAS消息标识包括：用户数据报协议UDP端口号，或，预定目的IP地址；
或者，若建立所述PPPoE会话，所述NAS消息封装在PPPoE会话中，所述NAS消息标识包括：所述PPPoE会话标识；
或者，若建立所述GRE隧道，所述NAS消息封装在GRE隧道中，所述NAS消息标识包括：所述GRE隧道的标识；
或者，所述NAS消息封装在可扩展认证协议EAP消息中，所述NAS消息标识包括：所述EAP参数类型；
或者，所述NAS消息封装在预定协议层中，所述NAS消息标识包括：所述预定协议层。
五方面，本发明实施例还提供了一种接入网关功能设备，包括：
接收单元，用于接收用户设备发送的非接入层NAS消息，所述NAS消息包含用于请求建立PDU会话的PDU会话建立请求消息；
发送单元，用于将所述NAS消息发送给移动性管理功能AMF；
所述接收单元，还用于接收PDU会话建立成功消息；
所述发送单元，还用于在所述接收单元接收到PDU会话建立成功消息后，将所述PDU会话建立成功消息发送给所述用户设备；
会话建立单元，用于与所述用户设备之间建立接入会话，所述接入会话为所述PDU会话相关的接入会话。
在一个可选的实现方式中，所述接入会话包括：
以太网上的点对点协议PPPoE会话，或，L2以太网会话，或，L3互联网协议会话，或，通用路由封装GRE隧道。
在一个可选的实现方式中，所述NAS消息封装在NAS消息标识中，所述NAS消息标识用于标识所述NAS消息。
在一个可选的实现方式中，所述会话建立单元，还用于在所述接收单元接收用户设备发送的非接入层NAS消息之前，建立所述用户设备与所述AGF之间的PPPoE会话；所述接收单元，用于接收用户设备发送的非接入层NAS消息包括：接收封装在所述PPPoE会话中的所述NAS消息，所述PPPoE会话标识为所述NAS消息标识；
或者，所述接收单元，用于接收用户设备发送的非接入层NAS消息包括：接收所述用户设备通过PPPoE的发现过程、网络控制协议IPCP过程以及链路控制协议LCP过程中的任意一项的消息向所述AGF发送的所述NAS消息。
在一个可选的实现方式中，所述PDU会话建立请求消息中还包含会话标识，所述会话标识为所述PDU会话相关的所述接入会话的标识信息。
在一个可选的实现方式中，所述会话建立单元，用于与所述用户设备之间建立接入会话包括：
通过所述接收单元接收所述用户设备发送的包含所述会话标识的PPPoE消息或接入会话消息，所述PPPoE消息用于建立PPPoE会话；所述PPPoE会话与所述会话标识对应的PDU会话绑定；所述接入会话消息用于建立接入会话，所述接入会话与所述会话标识对应的PDU会话绑定。
在一个可选的实现方式中，所述会话标识包括：所述AGF的MAC地址、AGF的互联网协议IP地址、虚拟局域网VLAN标签、GRE隧道标识、多协议标签交换MPLS标签、PPPoE会话标识、用户设备的MAC地址以及所述用户设备的互联网协议IP地址中的至少一项。
进一步地，所述发送单元，还用于将收到的SMF分配的所述用户设备的互联网协议IP地址通过PPPoE消息发送给所述用户设备。
在一个可选的实现方式中，所述接收单元，还用于接收所述用户设备发送的PDU会话的数据包，所述数据包中携带会话标识；
所述发送单元，还用于将所述数据包发送给会话标识对应的PDU会话。
在一个可选的实现方式中，所述接收单元，还用于在所述将所述接入会话对应到所述PDU会话之后，接收所述用户设备发送的数据包；
若所述数据包被封装到PPPoE会话标识中，所述会话建立单元，用于依据所述PPPoE会话标识确定所述数据包对应的所述PDU会话；
或者，若所述数据包被封装到所述AGF的MAC地址或所述AGF的互联网协议IP地址中，所述会话建立单元，用于依据所述AGF的MAC地址或所述AGF的互联网协议IP地址 确定所述数据包对应的所述PDU会话；
或者，若所述数据包被封装到虚拟无线局域网VLAN标签或多协议标签交换MPLS标签中，所述会话建立单元，用于依据所述VLAN标签或多协议标签交换MPLS标签确定所述数据包对应的所述PDU会话；
或者，所述数据包被封装到GRE隧道中，所述会话建立单元，用于依据所述GRE隧道标识确定所述数据包对应的所述PDU会话；
或者，若所述数据包被封装到所述用户设备的MAC地址或用户设备互联网协议IP地址中，所述会话建立单元，用于依据所述用户设备的MAC地址或用户设备IP地址确定所述数据包对应的所述PDU会话。
六方面本发明实施例还提供了一种会话管理功能设备，包括：
接收单元，用于接收PDU会话建立请求消息，所述PDU会话建立请求消息用于请求建立PDU会话；
标识获取单元，用于获取所述PDU会话对应的会话标识，所述会话标识为所述PDU会话相关的接入会话的标识信息；
发送单元，用于将所述会话标识发送给接入网关功能AGF或用户设备。
在一个可选的实现方式中，所述获取所述PDU会话对应的会话标识，并将所述会话标识发送给AGF或用户设备包括：
所述标识获取单元，用于接收所述AGF分配所述会话标识；所述发送单元，用于向所述用户设备发送PDU会话建立成功消息，在所述PDU会话建立成功消息中包含所述会话标识；
或者，所述标识获取单元，用于接收所述用户设备分配的所述会话标识；所述发送单元，用于向所述AGF发送SM信息，在所述SM信息中包含所述会话标识。
在一个可选的实现方式中，所述会话标识包括：
所述AGF的MAC地址、AGF的互联网协议IP地址、虚拟局域网VLAN标签、GRE隧道标识、多协议标签交换MPLS标签、以太网上的点对点协议PPPoE会话标识、用户设备的MAC地址以及所述用户设备的互联网协议IP地址中的至少一项。
在一个可选的实现方式中，所述发送单元，用于向所述AGF发送SM信息包括：向所述AGF发送SM信息，在所述SM信息中包含虚拟局域网VLAN标签、GRE隧道标识、多协议标签交换MPLS标签、PPPoE会话标识或所述用户设备的互联网协议IP地址或用户设备的MAC地址地址中的至少一个。
在一个可选的实现方式中，所述发送单元，还用于向所述用户设备发送PDU会话建立成功消息，在所述PDU会话建立成功消息中包含所述AGF的MAC地址、AGF的互联网协议IP地址、虚拟局域网VLAN标签、GRE隧道标识、多协议标签交换MPLS标签以及PPPoE会话标识中的至少一个。
七方面，本发明实施例还体用过了一种电子设备，包括：输入输出设备、处理器以及存储器，其特征在于，
在所述存储器中存储有可执行指令，所述处理器在执行所述可执行指令实现本发明实施例提供的任意一项所述的方法流程。
八方面，本发明实施例还提供了一种计算机存储介质，所述计算机存储介质中包含可执行指令，在所述可执行指令被执行的情况下，实现本发明实施例提供的任意一项的方法流程。
九方面，本发明实施例还提供了一种计算机程序产品，该计算机程序产品包含可执行指令，在所述可执行指令被执行的情况下，实现本发明实施例提供的任意一项的方法流程。
附图说明
为了更清楚地说明本发明实施例或背景技术中的技术方案，下面将对本发明实施例或背景技术中所需要使用的附图进行说明。
图1是本发明实施例5G系统架构示意图；
图2是本发明实施例包含5G融合核心网的系统架构示意图；
图3是本发明实施例方法流程示意图；
图4是本发明实施例方法流程示意图；
图5是本发明实施例用户设备结构示意图；
图6是本发明实施例接入网功能设备结构示意图；
图7是本发明实施例会话管理功能设备结构示意图；
图8是本发明实施例电子设备结构示意图；
图9是本发明实施例用户设备结构示意图。
具体实施方式
下面结合本发明实施例中的附图对本发明实施例进行描述。
如果1所示，为5G通信系统的系统举例，在图1中包含：UE、无线接入网(Radio Access Network，RNA)或者接入网(Access Network，AN)、用户面功能(User plane function，UPF)、数据网络(Data Network，DN)、AMF、SMF、策略控制功能(Policy Control Function，PCF)、应用功能(Application Function，AF)、鉴权服务器功能(Authentication Server Function，AUSF)、归一化数据管理(Unified Data Management，UDM)；分别使用N1-N15接口进行通信。
如图2所示，为本发明实施例提供的5G融合核心网的系统示意图；可以对照图1的5G通信系统结构，在图2中，虚线框部分为下一代控制面网元功能(Next Generation Control plane function，NG CP)；在接入网一侧新增了固网(Fixed)AN，在CPE这个位置，除了CPE外还可以是UE、RG、FNRG、无线保真(wifi)接入点(Access Point，AP)，其中(Broadband Network Gateway-User plane function，BNG-UP)与UPF采用N3接口通信。CPE和RAN之间可以使用NR或者Uu接口通信，图2中包含PPPoE会话和分组数据单元PDU会话。在图2中还示意了CPE向AMF发送注册请求。在以上图2中固网用户面终结在AGF，与固网与5G的CN-UPF保持独立。
上述AMF设备、SMF设备、UPF设备以及PCF设备，可以分别简称为AMF、SMF、UPF以及PCF。
以下基于以上图2所示5G融合核心网的系统，提供了用户设备通过固网接入到5G CN 的流程示意图，如图3所示。在图3中，AGF是AN的上层汇聚点，部署在固网接入网侧，对应到图2中的固网AN。
01-06:为PPPoE会话建立流程,该PPPoE会话建立流程建立了CPE与AGF之间的PPPoE连接。其中鉴权过程可以设置为省略。在该PPPoE会话建立流程中，AGF为CPE分配PPPoE session ID，并存储上述PPPoE session ID作为CPE的非接入层NAS会话，即专门用来传输NAS消息的PPPoE会话。
具体地，以上01-06分别为：
O1：CPE向AGF发送PADI消息；
02：AGF向CPE返回PPPoE提供(PPPoE Active Discovery Offer，PADO)消息；
03：CPE向AGF发送PPPoE请求(PPPoE active discovery request，PADR)消息；
04：AGF向CPE返回PPPoE会话证实(PPPoE active discovery session-confirmation，PADS)，在该PADS消息中携带了PPPoE session ID；
05：CPE向AGF发送参数请求(Parameters Request)；
06：AGF向CPE返回参数响应(Parameters Respond)。
更详细的PPPoE会话建立流程可以遵循相关协议规定，本发明实施例对此不作赘述。
具体地，在CPE建立了PPPoE会话以后，具体流程如下：
301：CPE发起注册流程(Registration procedure)。
该步骤是CPE使用NAS的PPPoE会话发送注册请求(Registration request)消息给AMF，从而发起注册流程。即：CPE向AMF发送注册请求消息，该注册请求消息使用NAS消息封装在第一条PPPoE会话中。
为了让AGF识别到该NAS消息，可以在该NAS消息中包含PPPoE session ID、或者虚拟局域网(Virtual Local Area Network，VLAN)ID或者特殊的IP地址。以下已NAS消息中包含PPPoE session ID为例进行举例说明。
AGF基于上述PPPoE session ID识别NAS消息，然后AGF将该NAS消息发送给AMF。然后网络侧完成CPE的注册流程。
NAS消息的发送方式还有很多，在发明内容中给出了其他的可选实现方案；本实施例作为一个应用例的举例，NAS消息中包含的用于AGF识别该NAS消息的方式，不应理解为对本发明实施例的唯一性限定。
302：CPE基于业务的需求触发PDU会话建立流程。
CPE发送PDU会话建立请求消息给AGF，上述PDU会话建立请求消息中含有PDU会话标识(PDU session ID)、类型标识等参数。上述PDU会话建立请求消息在NAS消息中，使用NAS的PPPoE会话发送该给AGF。
为了让AGF识别该NAS消息，CPE可以将PPPoE session ID、VLAN ID或者特殊的IP地址或特殊MAC地址封装NAS消息。例如：将PPPoE session ID或VLAN ID封装在NAS消息的L2消息头中。其他让AGF消息识别NAS消息的方式若可以达到相同的效果，本发明实施例不作唯一性限定。
303.AGF基于PPPoE Session ID识别NAS消息，通过N2接口转发上述PDU会话建立请求消息给AMF。
基于前述说明，本步骤中也可以基于上述VLAN ID识别该NAS消息；可选的，AGF获取并存储L2消息头中的VLAN ID。
304：AMF通过N11接口消息转发上述PDU会话建立请求消息给SMF。
305：SMF通过N4接口消息转发上述PDU会话建立请求消息给UPF。从而网络侧建立PDU会话。
在本实施例中，有(A)和(B)两种方案实现AGF分配特殊的AGF的MAC地址给CPE，并建立AGF的MAC地址与PDU会话之间的绑定关系。
其中方案(A)具体为：
306A:SMF发送N11接口回复消息，其中包括PDU会话建立成功(PDU session establishment accept)消息，PDU会话信息。
PDU会话建立成功消息可以包含：QoS策略，业务连续性模式等。PDU会话信息可以包含：PDU会话标识，QoS文件，核心网络隧道标识信息。
另外，SMF为CPE分配CPE的IP地址，并基于类型标识将CPE的IP地址通过AMF发送给AGF。即：SMF基于类型标识将CPE的IP地址携带在会话管理(Session Management，SM)信息中发送给AGF。
307A：AMF将步骤306A中收到的PDU会话建立成功消息和PDU会话信息通过N2接口发送给AGF，AGF将PDU会话建立成功消息发送给CPE。
具体的，AGF解析PDU会话信息获取PDU会话标识，AGF为上述PDU会话分配特殊的AGF MAC地址，并使用上述MAC地址作为AGF源地址封装PDU会话建立成功消息。此处特殊的AGF MAC地址，特殊在于该AGF MAC地址和PDU会话建立了绑定关系，也可以称为专用的AGF MAC地址。
此处，CPE可以从上述PDU会话建立成功消息的L2源MAC地址获取该PDU会话对应的AGF MAC地址。CPE可以存储PDU会话标识与特殊AGF MAC地址对应关系。
另外，AGF可以获取PDU会话标识和上述CPE的IP地址，AGF建立PDU session ID与CPE IP地址之间的绑定关系。后续，AGF可以基于该CPE IP地址来识别其与PDU session之间的对应关系。
可选的，AGF还可以设置或更新之前存储的VLAN ID，具体地：AGF将VLAN ID携带在L2消息头中发送给FAN或CPE。FAN或CPE存储AGF发送的VLAN ID与PDU会话对应关系。其中，AGF设置VLAN ID可以是FAN之前没有设置VLAN ID的情况；AGF更新VLAN ID则是之前已有VLAN ID。
308A：AGF还可以存储PDU会话信息中的核心网络侧隧道标识信息，并分配AGF自己的隧道标识，即分配AGF隧道标识；然后，AGF将AGF隧道标识通过N2接口消息发送给AMF。
309A：AMF转发AGF隧道标识给SMF，SMF转发上述AGF隧道标识给UPF，用于更新隧道信息。至此完成UPF与AGF的用户面隧道建立流程。
方案(B)如下：
306B：SMF发送N11接口回复消息，其中包括PDU会话信息。
该PDU会话信息可以包括：PDU会话标识，QoS文件，核心网络隧道标识信息等。在 本步骤中，SMF还可以为CPE分配IP地址，然后发送给AGF。SMF发送CPE IP地址给AGF的方式可以基于类型标识的指示来获得。
307B：AMF将上述PDU会话信息发送AGF。AGF分配AGF隧道标识。此外，AGF获取PDU会话信息中的PDU会话标识，AGF为上述PDU会话分配特殊的AGF MAC地址。
308B：AGF将分配的AGF隧道标识以及特殊的AGF MAC地址发送给AMF，由AMF转发给SMF。
另外，在本步骤中，AGF还可以将VLAN ID发送给AMF，然后由AMF转发给SMF。
309B：SMF将AGF隧道标识发送给UPF，用于更新隧道信息。
310B：SMF生成PDU会话建立成功消息，并通过AMF、AGF发送给CPE。上述PDU会话建立成功消息中含有AGF MAC地址，还可以包含PDU会话标识。
CPE从PDU会话建立成功消息中获取该PDU会话对应的AGF MAC地址。CPE存储PDU会话标识与AGF MAC地址之间的对应关系。在本实施例中，使用AGF MAC地址和PDU会话标识来保存PDU会话与接入会话之间的对应关系，由于PDU会话以及接入会话均可以使用多种标识信息来进行区分，本实施例中以及发明内容中均给出了举例；因此保存PDU会话与接入会话之间的对应关系的方式还有很多，在此不再一一赘述。
另外，SMF还可以通过NAS消息携带上述VLAN ID与PDU session ID对应关系，并发送给CPE。这样，CPE可以存储VLAN ID与PDU会话之间的对应关系。
311：CPE发起PPPoE会话建立流程，CPE使用与PDU会话相对应的AGF的MAC地址或VLAN ID中的至少一个封装PPPoE消息。
AGF完成PPPoE会话建立流程，AGF将之前收到的SMF分配的CPE IP地址通过PPPoE流程发送给CPE。AGF基于AGF MAC地址、VLAN ID或CPE IP地址识别上述PPPoE会话对应的PDU会话。至此，AGF可以基于AGF MAC地址、VLAN ID、CPE IP地址或PPPoE session ID中的至少一个将CPE的数据包索引到相应的PDU session，完成PPPoE会话数据包到PDU会话的转发。此方案也适用于多个PPPoE会话对应唯一PDU会话的场景。在此场景下，CPE重复步骤11，建立多个PPPoE会话与PDU会话对应关系。
以下基于以上图2所示5G融合核心网的系统，提供了用户设备通过固网接入到5G CN的流程示意图，如图4所示。在图4中，AGF是AN的上层汇聚点，部署在固网接入网侧，对应到图2中的固网AN。
0：CPE注册到网络侧，注册过程可以遵循相关协议规定，本发明实施例对此不作赘述。
01-06:CPE基于业务需求发起PPPoE会话建立流程,在上述PPPoE会话建立流程中，AGF为CPE分配全零IP地址(0.0.0.0)，另外，AGF还可以设置特殊服务器IP地址作为NAS封装目的IP地址，如：AGF将AMF IP地址作为NAS目的IP地址通过PPPoE流程发送给CPE。上述PPPoE会话建立流程建立了CPE与AGF之间的PPPoE连接。其中鉴权过程可以设置为省略。
具体地，以上01-06分别为：
O1：CPE向AGF发送PADI消息；
02：AGF向CPE返回PADO消息；
03：CPE向AGF发送PADR消息；
04：AGF向CPE返回PADS；
05：CPE向AGF发送参数请求(Parameters Request)；
06：AGF向CPE返回参数响应(Parameters Respond)，在该参数响应中携带了AMF IP地址。
在本实施例中可以使用特殊的IP地址，例如：AMF IP地址、非全零预定IP地址等来标识NAS消息，使AGF分辨出NAS消息。AGF需要区分CPE发送给AGF的NAS消息和数据包，其中数据包发送给UPF，NAS消息发送给AMF。前面实施例中还给出了使用PPPoE会话标识等方式来标识NAS消息，使AGF能够识别出NAS消息，在此不再赘述。
更详细的PPPoE会话建立流程可以遵循相关协议规定，本发明实施例对此不作赘述。在执行完01-06后建立了PPPoE会话。
401：CPE使用上述PPPoE会话发送PDU会话建立请求消息，可以将PPPoE session ID或者上述AMF IP地址携带在上述PDU会话建立请求消息中发送给上述AGF。
上述CPE使用NAS消息将上述PDU会话建立请求消息发送给上述AGF，即：CPE可以采用NAS的IP地址封装上述PDU会话建立请求消息，发送给上述AGF。
在本步骤中，上述PDF请求消息中可以包含用于AGF识别该NAS消息的标识信息，例如：PPPoE会话标识、PDU会话标识、特殊的目的IP地址，例如前面举例的AMF IP地址。
402：AGF识别NAS消息，将识别出的NAS消息通过N2接口发送给AMF。
这里NAS消息具体包含上述PDU会话建立请求消息。
403：AMF通过N11接口将PDU会话建立请求消息发送给SMF，用于建立PDU会话。
建立PDU会话的过程可以遵循相关的协议规定，本实施例不予赘述。
在本实施例中，SMF在接收到PDU会话建立请求后，SMF可以为CPE分配CPE IP地址，SMF可以存储CPE标识、PPPoE session ID与PDU session ID对应关系。
404：SMF通过N11接口将SM信息发送给AMF，该N11接口的消息可以包含SM信息以及PDU会话建立成功消息。
其中，SM信息可以包含：PDU session ID、PPPoE session ID以及QoS文件等。在PDU会话建立成功消息中可以包含上述CPE IP地址。
405：AMF将收到的N11接口的消息通过N2接口发送给AGF。
AGF解析上述SM信息，得到并存储PPPoE session ID与PDU session ID对应关系。
406：AGF转发PDU会话建立成功消息给CPE。
由于上述PDU会话建立成功消息中包含有CPE IP地址，因此CPE可以解析该PDU会话建立成功消息获得该CPE IP地址，从而得到SMF为CPE分配的IP地址，CPE使用解析得到的IP地址替换前面使用的全零IP地址。
407：更新隧道信息。具体更新隧道信息的流程，可以参考前一实施例，在此不再赘述。
408：CPE发送PDU会话的数据包。CPE将上述PDU会话的数据包封装到PDU会话对应的PPPoE会话中，即上述数据包封装到PPPoE session ID中。AGF接收该PDU会话的数 据包后，获取PPPoE session ID。AGF基于存储PPPoE session ID与PDU session ID对应关系查找PDU session ID。AGF将上述数据包发给PDU session ID标识的PDU会话。
本发明实施例还提供了一种用户设备，如图5所示，包括：
发送单元501，用于向接入网关功能AGF发送非接入层NAS消息，所述NAS消息包含用于请求建立PDU会话的PDU会话建立请求消息；
接收单元502，用于接收网络侧设备返回的PDU会话建立成功消息；
会话建立单元503，用于与所述AGF之间建立接入会话，所述接入会话为所述PDU会话相关的接入会话。
可选地，所述接入会话包括：
以太网上的点对点协议PPPoE会话，或，L2以太网会话，或，L3互联网协议会话，或，通用路由封装GRE隧道。
可选地，所述NAS消息封装在NAS消息标识中，所述NAS消息标识用于标识所述NAS消息。
可选地，所述会话建立单元503，还用于在所述用户设备向AGF发送非接入层NAS消息之前，建立所述用户设备与所述AGF之间的PPPoE会话；所述发送单元501，用于向AGF发送非接入层NAS消息包括：将所述NAS消息封装在所述PPPoE会话中，所述PPPoE会话标识为所述NAS消息标识；
或者，所述发送单元501，用于向AGF发送非接入层NAS消息包括：通过PPPoE的发现过程、网络控制协议IPCP过程以及链路控制协议LCP过程中的任意一项的消息向所述AGF发送的所述NAS消息。
可选地，所述PDU会话建立请求消息中还包含会话标识，所述会话标识为所述PDU会话相关的所述接入会话的标识信息。
可选地，所述PDU会话建立成功消息中包含所述会话标识，所述会话标识为所述PDU会话相关的接入会话的标识信息；或者，所述PDU会话建立成功消息封装在会话标识中，所述会话标识为所述PDU会话相关的接入会话的标识信息。
可选地，所述会话标识包括：所述AGF的MAC地址、所述AGF的互联网协议IP地址、虚拟局域网VLAN标签、GRE隧道标识、多协议标签交换MPLS标签、PPPoE会话标识、用户设备的MAC地址以及所述用户设备的互联网协议IP地址中的至少一项。
可选地，所述会话建立单元503，用于与所述AGF之间建立接入会话包括：通过所述发送单元501向所述AGF发送包含所述会话标识的PPPoE消息或接入会话消息，所述PPPoE消息用于建立PPPoE会话，所述PPPoE会话与所述会话标识对应的PDU会话绑定；所述接入会话消息用于请求建立接入会话，所述接入会话与所述会话标识对应的PDU会话绑定。
进一步地，所述发送单元501，还用于发送PDU会话的数据包，使用所述PDU会话对应的会话标识封装所述数据包。
进一步地，所述用户设备还包括：
封装单元504，用于确定所述PDU会话对应的PPPoE会话标识，将所述PDU会话的数据包封装到所述PPPoE会话标识中发送给所述AGF；
或者，用于确定所述PDU会话对应的所述AGF的MAC地址或所述AGF的互联网协议IP地址，将所述PDU会话的数据包封装到所述AGF的MAC地址或所述AGF的互联网协议IP地址中发送给所述AGF；
或者，用于确定所述PDU会话对应的所述PDU会话对应的GRE隧道标识，将所述PDU会话的数据包封装到所述GRE隧道中发送给所述AGF；
或者，用于确定所述PDU会话对应的虚拟无线局域网VLAN标签或多协议标签交换MPLS标签，将所述PDU会话的数据包封装到所述VLAN标签或多协议标签交换MPLS标签中发送给所述AGF；
或者，用于确定所述PDU会话对应的用户设备MAC地址，将所述PDU会话的数据包封装到所述用户设备MAC地址中发送给所述AGF。
可选地，所述NAS消息封装在层2数据包中，所述NAS消息标识包括：虚拟局域网VLAN标签，或，AGF的MAC地址，或，以太网类型；
或者，所述NAS消息封装在层3数据包中，所述NAS消息标识包括：用户数据报协议UDP端口号，或，预定目的IP地址；
或者，若建立所述PPPoE会话，所述NAS消息封装在PPPoE会话中，所述NAS消息标识包括：所述PPPoE会话标识；
或者，若建立所述GRE隧道，所述NAS消息封装在GRE隧道中，所述NAS消息标识包括：所述GRE隧道的标识；
或者，所述NAS消息封装在可扩展认证协议EAP消息中，所述NAS消息标识包括：所述EAP参数类型；
或者，所述NAS消息封装在预定协议层中，所述NAS消息标识包括：所述预定协议层。
本发明实施例还提供了一种接入网关功能设备，如图6所示，包括：
接收单元601，用于接收用户设备发送的非接入层NAS消息，所述NAS消息包含用于请求建立PDU会话的PDU会话建立请求消息；
发送单元602，用于将所述NAS消息发送给移动性管理功能AMF；
所述接收单元601，还用于接收PDU会话建立成功消息；
所述发送单元602，还用于在所述接收单元601接收到PDU会话建立成功消息后，将所述PDU会话建立成功消息发送给所述用户设备；
会话建立单元603，用于与所述用户设备之间建立接入会话，所述接入会话为所述PDU会话相关的接入会话。
可选地，所述接入会话包括：
以太网上的点对点协议PPPoE会话，或，L2以太网会话，或，L3互联网协议会话，或，通用路由封装GRE隧道。
可选地，所述NAS消息封装在NAS消息标识中，所述NAS消息标识用于标识所述NAS消息。
进一步地，所述会话建立单元603，还用于在所述接收单元601接收用户设备发送的非接入层NAS消息之前，建立所述用户设备与所述AGF之间的PPPoE会话；所述接收单元601，用于接收用户设备发送的非接入层NAS消息包括：接收封装在所述PPPoE会话中的 所述NAS消息，所述PPPoE会话标识为所述NAS消息标识；
或者，所述接收单元601，用于接收用户设备发送的非接入层NAS消息包括：接收所述用户设备通过PPPoE的发现过程、网络控制协议IPCP过程以及链路控制协议LCP过程中的任意一项的消息向所述AGF发送的所述NAS消息。
可选地，所述PDU会话建立请求消息中还包含会话标识，所述会话标识为所述PDU会话相关的所述接入会话的标识信息。
进一步地，所述接收单元601，还用于接收所述SMF发送的PDU会话信息；
所述发送单元602；还用于将为所述PDU会话分配会话标识发送给所述SMF，SMF将所述会话标识携带在PDU会话建立成功消息中发送给所述用户设备；
或者，所述接收单元601，用于接收所述SMF发送的PDU会话建立成功消息，所述AGF为所述PDU会话分配会话标识；
所述发送单元602，还用于将PDU会话建立成功消息封装在上述会话标识中发送给用户设备
可选地，所述会话建立单元603，用于与所述用户设备之间建立接入会话包括：
通过所述接收单元601接收所述用户设备发送的包含所述会话标识的PPPoE消息或接入会话消息，所述PPPoE消息用于建立PPPoE会话；所述PPPoE会话与所述会话标识对应的PDU会话绑定；所述接入会话消息用于建立接入会话，所述接入会话与所述会话标识对应的PDU会话绑定。
可选地，所述会话标识包括：所述AGF的MAC地址、AGF的互联网协议IP地址、虚拟局域网VLAN标签、GRE隧道标识、多协议标签交换MPLS标签、PPPoE会话标识、用户设备的MAC地址以及所述用户设备的互联网协议IP地址中的至少一项。
进一步地，所述发送单元602，还用于将收到的SMF分配的所述用户设备的互联网协议IP地址通过PPPoE消息发送给所述用户设备。
进一步地，所述接收单元601，还用于接收所述用户设备发送的PDU会话的数据包，所述数据包中携带会话标识；
所述发送单元602，还用于将所述数据包发送给会话标识对应的PDU会话。
进一步地，所述接收单元601，还用于在所述将所述接入会话对应到所述PDU会话之后，接收所述用户设备发送的数据包；
若所述数据包被封装到PPPoE会话标识中，所述会话建立单元603，用于依据所述PPPoE会话标识确定所述数据包对应的所述PDU会话；
或者，若所述数据包被封装到所述AGF的MAC地址或所述AGF的互联网协议IP地址中，所述会话建立单元603，用于依据所述AGF的MAC地址或所述AGF的互联网协议IP地址确定所述数据包对应的所述PDU会话；
或者，若所述数据包被封装到虚拟无线局域网VLAN标签或多协议标签交换MPLS标签中，所述会话建立单元603，用于依据所述VLAN标签或多协议标签交换MPLS标签确定所述数据包对应的所述PDU会话；
或者，若所述数据包被封装到GRE隧道中，所述会话建立单元603，用于依据所述GRE隧道标识确定所述数据包对应的所述PDU会话；
或者，若所述数据包被封装到所述用户设备的MAC地址或用户设备互联网协议IP地址中，所述会话建立单元603，用于依据所述用户设备的MAC地址或用户设备IP地址确定所述数据包对应的所述PDU会话。
本发明实施例还提供了一种会话管理功能设备，如图7所示，包括：
接收单元701，用于接收PDU会话建立请求消息，所述PDU会话建立请求消息用于请求建立PDU会话；
标识获取单元702，用于获取所述PDU会话对应的会话标识，所述会话标识为所述PDU会话相关的接入会话的标识信息；
发送单元703，用于将所述会话标识发送给接入网关功能AGF或用户设备。
可选地，所述获取所述PDU会话对应的会话标识，并将所述会话标识发送给AGF或用户设备包括：
所述标识获取单元702，用于接收所述AGF分配所述会话标识；所述发送单元703，用于向所述用户设备发送PDU会话建立成功消息，在所述PDU会话建立成功消息中包含所述会话标识；
或者，所述标识获取单元702，用于接收所述用户设备分配的所述会话标识；所述发送单元703，用于向所述AGF发送SM信息，在所述SM信息中包含所述会话标识。
可选地，所述会话标识包括：
所述AGF的MAC地址、AGF的互联网协议IP地址、虚拟局域网VLAN标签、GRE隧道标识、多协议标签交换MPLS标签、以太网上的点对点协议PPPoE会话标识、用户设备的MAC地址以及所述用户设备的互联网协议IP地址中的至少一项。
可选地，所述发送单元703，用于向所述AGF发送SM信息包括：向所述AGF发送SM信息，在所述SM信息中包含虚拟局域网VLAN标签、GRE隧道标识、多协议标签交换MPLS标签、PPPoE会话标识或所述用户设备的互联网协议IP地址或用户设备的MAC地址地址中的至少一个。
进一步地，所述发送单元703，还用于向所述用户设备发送PDU会话建立成功消息，在所述PDU会话建立成功消息中包含所述AGF的MAC地址、AGF的互联网协议IP地址、虚拟局域网VLAN标签、GRE隧道标识、多协议标签交换MPLS标签以及PPPoE会话标识中的至少一个。
请参见图8，图8是本发明实施例提供的一种电子设备80，该电子设备80包括处理器801、存储器802和收发器803，所述处理器801、存储器802和收发器803可以通过总线相互连接。
存储器802包括但不限于是随机存储记忆体(Random Access Memory，RAM)、只读存储器(Read-Only Memory，ROM)、可擦除可编程只读存储器(Erasable Programmable Read Only Memory，EPROM)、或便携式只读存储器(Compact Disc Read-Only Memory，CD-ROM)，该存储器802用于相关指令及数据。收发器803用于接收和发送数据。因此，在本实施例中，收发器803可以对应到前述实施例中发送单元和接收单元，其他单元的功能可以对应到处理器801的功能。
处理器801可以是一个或多个中央处理器(Central Processing Unit，CPU)，在处 理器801是一个CPU的情况下，该CPU可以是单核CPU，也可以是多核CPU。
该设备80中的处理器801用于读取所述存储器802中存储的程序代码，执行前述方法实施例或者发明内容中方法中的步骤，在此不再一一赘述。
该电子设备可以是本发明实施例所涉及的用户设备、AGF，AMF等实体设备，这取决于该电子设备所执行的具体内容。
作为一个举例，如图9所示，为用户设备的一个硬件结构的举例，如图9所示，为了便于说明，仅示出了与本发明实施例相关的部分，具体技术细节未揭示的，请参照本发明实施例方法部分。该用户设备可以为包括手机、平板电脑、PDA(Personal Digital Assistant，个人数字助理)、POS(Point of Sales，销售终端)、车载电脑等任意用户设备，以用户设备为手机为例：
图9示出的是与本发明实施例提供的用户设备相关的手机的部分结构的框图。参考图9，手机包括：射频(Radio Frequency，RF)电路910、存储器920、输入单元930、显示单元940、传感器950、音频电路960、无线保真(Wireless Fidelity，WiFi)模块970、处理器980、以及电源990等部件。本领域技术人员可以理解，图9中示出的手机结构并不构成对手机的限定，可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
下面结合图9对手机的各个构成部件进行具体的介绍：
RF电路910可用于收发信息或通话过程中，信号的接收和发送，特别地，将基站的下行信息接收后，给处理器980处理；另外，将设计上行的数据发送给基站。通常，RF电路910包括但不限于天线、至少一个放大器、收发信机、耦合器、低噪声放大器(Low Noise Amplifier，LNA)、双工器等。此外，RF电路910还可以通过无线通信与网络和其他设备通信。上述无线通信可以使用任一通信标准或协议，包括但不限于全球移动通讯系统(Global System of Mobile communication，GSM)、通用分组无线服务(General Packet Radio Service，GPRS)、码分多址(Code Division Multiple Access，CDMA)、宽带码分多址(Wideband Code Division Multiple Access,WCDMA)、长期演进(Long Term Evolution，LTE)、电子邮件、短消息服务(Short Messaging Service，SMS)等。
存储器920可用于存储软件程序以及模块，处理器980通过运行存储在存储器920的软件程序以及模块，从而执行手机的各种功能应用以及数据处理。存储器920可主要包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序(比如声音播放功能、图像播放功能等)等；存储数据区可存储根据手机的使用所创建的数据(比如音频数据、电话本等)等。此外，存储器920可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他易失性固态存储器件。
输入单元930可用于接收输入的数字或字符信息，以及产生与手机的用户设置以及功能控制有关的键信号输入。具体地，输入单元930可包括触控面板931以及其他输入设备932。触控面板931，也称为触摸屏，可收集用户在其上或附近的触摸操作(比如用户使用手指、触笔等任何适合的物体或附件在触控面板931上或在触控面板931附近的操作)，并根据预先设定的程式驱动相应的连接装置。可选的，触控面板931可包括触摸检测装置 和触摸控制器两个部分。其中，触摸检测装置检测用户的触摸方位，并检测触摸操作带来的信号，将信号传送给触摸控制器；触摸控制器从触摸检测装置上接收触摸信息，并将它转换成触点坐标，再送给处理器980，并能接收处理器980发来的命令并加以执行。此外，可以采用电阻式、电容式、红外线以及表面声波等多种类型实现触控面板931。除了触控面板931，输入单元930还可以包括其他输入设备932。具体地，其他输入设备932可以包括但不限于物理键盘、功能键(比如音量控制按键、开关按键等)、轨迹球、鼠标、操作杆等中的一种或多种。
显示单元940可用于显示由用户输入的信息或提供给用户的信息以及手机的各种菜单。显示单元940可包括显示面板941，可选的，可以采用液晶显示器(Liquid Crystal Display，LCD)、有机发光二极管(Organic Light-Emitting Diode,OLED)等形式来配置显示面板941。进一步的，触控面板931可覆盖显示面板941，当触控面板931检测到在其上或附近的触摸操作后，传送给处理器980以确定触摸事件的类型，随后处理器980根据触摸事件的类型在显示面板941上提供相应的视觉输出。虽然在图9中，触控面板931与显示面板941是作为两个独立的部件来实现手机的输入和输入功能，但是在某些实施例中，可以将触控面板931与显示面板941集成而实现手机的输入和输出功能。
手机还可包括至少一种传感器950，比如光传感器、运动传感器以及其他传感器。具体地，光传感器可包括环境光传感器及接近传感器，其中，环境光传感器可根据环境光线的明暗来调节显示面板941的亮度，接近传感器可在手机移动到耳边时，关闭显示面板941和/或背光。作为运动传感器的一种，加速计传感器可检测各个方向上(一般为三轴)加速度的大小，静止时可检测出重力的大小及方向，可用于识别手机姿态的应用(比如横竖屏切换、相关游戏、磁力计姿态校准)、振动识别相关功能(比如计步器、敲击)等；至于手机还可配置的陀螺仪、气压计、湿度计、温度计、红外线传感器等其他传感器，在此不再赘述。
音频电路960、扬声器961，传声器962可提供用户与手机之间的音频接口。音频电路960可将接收到的音频数据转换后的电信号，传输到扬声器961，由扬声器961转换为声音信号输出；另一方面，传声器962将收集的声音信号转换为电信号，由音频电路960接收后转换为音频数据，再将音频数据输出处理器980处理后，经RF电路910以发送给比如另一手机，或者将音频数据输出至存储器920以便进一步处理。
WiFi属于短距离无线传输技术，手机通过WiFi模块970可以帮助用户收发电子邮件、浏览网页和访问流式媒体等，它为用户提供了无线的宽带互联网访问。虽然图9示出了WiFi模块970，但是可以理解的是，其并不属于手机的必须构成，完全可以根据需要在不改变发明的本质的范围内而省略。
处理器980是手机的控制中心，利用各种接口和线路连接整个手机的各个部分，通过运行或执行存储在存储器920内的软件程序和/或模块，以及调用存储在存储器920内的数据，执行手机的各种功能和处理数据，从而对手机进行整体监控。可选的，处理器980可包括一个或多个处理单元；优选的，处理器980可集成应用处理器和调制解调处理器，其中，应用处理器主要处理操作系统、用户界面和应用程序等，调制解调处理器主要处理无线通信。可以理解的是，上述调制解调处理器也可以不集成到处理器980中。
手机还包括给各个部件供电的电源990(比如电池)，优选的，电源可以通过电源管理系统与处理器980逻辑相连，从而通过电源管理系统实现管理充电、放电、以及功耗管理等功能。
尽管未示出，手机还可以包括摄像头、蓝牙模块等，在此不再赘述。
在本发明实施例中，该用户设备所包括的处理器980具有对应前述实施例处理器801的功能，RF电路910和WiFi模块970，则可以对应到用户设备的发送单元和接收单元的功能。具体执行的功能描述可以参考方法实施例以及用户设备的装置实施例，在此不再赘述。
本发明实施例还提供了一种计算机程序产品，该计算机程序产品包含可执行指令，在所述可执行指令被执行的情况下，实现本发明实施例提供的任意一项的方法流程。
本发明实施例还提供了一种计算机存储介质，所述计算机存储介质中包含可执行指令，在所述可执行指令被执行的情况下，实现本发明实施例任意一项的方法流程。本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程，该流程可以由计算机程序来指令相关的硬件完成，该程序可存储于计算机可读取存储介质中，该程序在执行时，可包括如上述各方法实施例的流程。而前述的存储介质包括：ROM或随机存储记忆体RAM、磁碟或者光盘等各种可存储程序代码的介质。

Claims (29)

  1. 一种会话管理方法，其特征在于，包括：
    用户设备向接入网关功能AGF发送非接入层NAS消息，所述NAS消息包含用于请求建立PDU会话的PDU会话建立请求消息,所述用户设备接收网络侧设备返回的PDU会话建立成功消息；
    所述用户设备与所述AGF之间建立接入会话，所述接入会话为所述PDU会话相关的接入会话。
  2. 根据权利要求1所述方法，其特征在于，所述接入会话包括：
    以太网上的点对点协议PPPoE会话，或，L2以太网会话，或，L3互联网协议会话，或，通用路由封装GRE隧道。
  3. 根据权利要求1所述方法，其特征在于，
    所述NAS消息封装在NAS消息标识中，所述NAS消息标识用于标识所述NAS消息。
  4. 根据权利要求3所述方法，其特征在于，
    在所述用户设备向AGF发送非接入层NAS消息之前，所述方法还包括：建立所述用户设备与所述AGF之间的PPPoE会话；所述用户设备向AGF发送非接入层NAS消息包括：用户设备将所述NAS消息封装在所述PPPoE会话中，所述PPPoE会话标识为所述NAS消息标识；
    或者，所述用户设备向AGF发送非接入层NAS消息包括：通过PPPoE的发现过程、网络控制协议IPCP过程以及LCP过程中的任意一项的消息向所述AGF发送的所述NAS消息。
  5. 根据权利要求1所述方法，其特征在于，所述PDU会话建立请求消息中还包含会话标识，所述会话标识为所述PDU会话相关的所述接入会话的标识信息；
    所述PDU会话建立成功消息中包含所述会话标识；或者，所述PDU会话建立成功消息封装在所述会话标识中。
  6. 根据权利要求5所述方法，其特征在于，所述会话标识包括：所述AGF的MAC地址、所述AGF的互联网协议IP地址、虚拟局域网VLAN标签、GRE隧道标识、多协议标签交换MPLS标签、PPPoE会话标识、用户设备的MAC地址以及所述用户设备的互联网协议IP地址中的至少一项。
  7. 根据权利要求5所述方法，其特征在于，所述用户设备与所述AGF之间建立接入会话包括：
    所述用户设备向所述AGF发送包含所述会话标识的PPPoE消息或接入会话消息，所述PPPoE消息用于建立PPPoE会话，所述PPPoE会话与所述会话标识对应的PDU会话绑定；所述接入会话消息用于建立接入会话，所述接入会话与所述会话标识对应的PDU会话绑定。
  8. 根据权利要求5所述方法，其特征在于，所述方法还包括：
    所述用户设备发送PDU会话的数据包，使用所述PDU会话对应的会话标识封装所述数据包。
  9. 根据权利要求1所述方法，其特征在于，所述方法还包括：
    所述用户设备确定所述PDU会话对应的PPPoE会话标识，将所述PDU会话的数据包封 装到所述PPPoE会话标识中发送给所述AGF；
    或者，所述用户设备确定所述PDU会话对应的所述AGF的MAC地址或所述AGF的互联网协议IP地址，将所述PDU会话的数据包封装到所述AGF的MAC地址或所述AGF的互联网协议IP地址中发送给所述AGF；
    或者，所述用户设备确定所述PDU会话对应的虚拟无线局域网VLAN标签或多协议标签交换MPLS标签，将所述PDU会话的数据包封装到所述VLAN标签或多协议标签交换MPLS标签中发送给所述AGF；
    或者，所述用户设备确定所述PDU会话对应的GRE隧道标识，将所述PDU会话的数据包封装到所述GRE隧道中发送给所述AGF；
    或者，所述用户设备确定所述PDU会话对应的用户设备MAC地址，将所述PDU会话的数据包封装到所述用户设备MAC地址中发送给所述AGF。
  10. 根据权利要求3所述方法，其特征在于，
    所述NAS消息封装在层2数据包中，所述NAS消息标识包括：虚拟局域网VLAN标签，或，AGF的MAC地址，或，以太网类型；
    或者，所述NAS消息封装在层3数据包中，所述NAS消息标识包括：用户数据报协议UDP端口号，或，预定目的IP地址；
    或者，若建立所述PPPoE会话，所述NAS消息封装在PPPoE会话中，所述NAS消息标识包括：所述PPPoE会话标识；
    或者，若建立所述GRE隧道，所述NAS消息封装在GRE隧道中，所述NAS消息标识包括：所述GRE隧道的标识；
    或者，所述NAS消息封装在可扩展认证协议EAP消息中，所述NAS消息标识包括：所述EAP参数类型；
    或者，所述NAS消息封装在预定协议层中，所述NAS消息标识包括：所述预定协议层。
  11. 一种会话管理方法，其特征在于，包括：
    接入网关功能AGF接收用户设备发送的非接入层NAS消息，所述NAS消息包含用于请求建立PDU会话的PDU会话建立请求消息；
    所述AGF将所述NAS消息发送给移动性管理功能AMF；所述AGF在接收到PDU会话建立成功消息后，将所述PDU会话建立成功消息发送给所述用户设备；
    所述AGF与所述用户设备之间建立接入会话，所述接入会话为所述PDU会话相关的接入会话。
  12. 根据权利要求11所述方法，其特征在于，所述接入会话包括：
    以太网上的点对点协议PPPoE会话，或，L2以太网会话，或，L3互联网协议会话，或，通用路由封装GRE隧道。
  13. 根据权利要求11所述方法，其特征在于，
    所述NAS消息封装在NAS消息标识中，所述NAS消息标识用于标识所述NAS消息。
  14. 根据权利要求13所述方法，其特征在于，在所述接入网关功能AGF接收用户设备发送的非接入层NAS消息之前，所述方法还包括：建立所述用户设备与所述AGF之间的PPPoE会话；所述接入网关功能AGF接收用户设备发送的非接入层NAS消息包括：接收封 装在所述PPPoE会话中的所述NAS消息，所述PPPoE会话标识为所述NAS消息标识；
    或者，所述接入网关功能AGF接收用户设备发送的非接入层NAS消息包括：接收所述用户设备通过PPPoE的发现过程、网络控制协议IPCP过程以及链路控制协议LCP过程中的任意一项的消息向所述AGF发送的所述NAS消息。
  15. 根据权利要求11所述方法，其特征在于，所述方法还包括：
    所述AGF接收所述SMF发送的PDU会话信息；所述AGF为所述PDU会话分配会话标识；所述AGF将所述会话标识发送给所述SMF，SMF将所述会话标识携带在PDU会话建立成功消息中发送给所述用户设备；
    或者，所述AGF接收所述SMF发送的PDU会话建立成功消息，所述AGF为所述PDU会话分配会话标识；所述AGF将PDU会话建立成功消息封装在所述会话标识中发送给用户设备。
  16. 根据权利要求11所述方法，其特征在于，
    所述PDU会话建立请求消息中还包含会话标识，所述会话标识为所述PDU会话相关的所述接入会话的标识信息。
  17. 根据权利要求15所述方法，其特征在于，所述AGF与所述用户设备之间建立接入会话包括：
    所述AGF接收所述用户设备发送的包含所述会话标识的PPPoE消息或接入会话消息，所述PPPoE消息用于建立PPPoE会话；所述PPPoE会话与所述会话标识对应的PDU会话绑定；所述接入会话消息用于建立接入会话，所述接入会话与所述会话标识对应的PDU会话绑定。
  18. 根据权利要求15至17任意一项所述方法，其特征在于，所述会话标识包括：所述AGF的MAC地址、AGF的互联网协议IP地址、虚拟局域网VLAN标签、GRE隧道标识、多协议标签交换MPLS标签、PPPoE会话标识、用户设备的MAC地址以及所述用户设备的互联网协议IP地址中的至少一项。
  19. 根据权利要求18所述方法，其特征在于，所述方法还包括：
    所述AGF将收到的SMF分配的所述用户设备的互联网协议IP地址通过PPPoE消息发送给所述用户设备。
  20. 根据权利要求11所述方法，其特征在于，所述方法还包括：
    接收所述用户设备发送的PDU会话的数据包，所述数据包中携带会话标识；
    将所述数据包发送给会话标识对应的PDU会话。
  21. 根据权利要求20所述方法，其特征在于，在所述将所述接入会话对应到所述PDU会话之后，所述方法还包括：
    接收所述用户设备发送的数据包；
    所述数据包被封装到PPPoE会话标识中，依据所述PPPoE会话标识确定所述数据包对应的所述PDU会话；
    或者，所述数据包被封装到所述AGF的MAC地址或所述AGF的互联网协议IP地址中，依据所述AGF的MAC地址或所述AGF的互联网协议IP地址确定所述数据包对应的所述PDU会话；
    或者，所述数据包被封装到虚拟无线局域网VLAN标签或多协议标签交换MPLS标签中，依据所述VLAN标签或多协议标签交换MPLS标签确定所述数据包对应的所述PDU会话；
    或者，所述数据包被封装到GRE隧道中，依据所述GRE隧道标识确定所述数据包对应的所述PDU会话；
    或者，所述数据包被封装到所述用户设备的MAC地址或用户设备互联网协议IP地址中，依据所述用户设备的MAC地址或用户设备IP地址确定所述数据包对应的所述PDU会话。
  22. 一种会话管理方法，其特征在于，包括：
    会话管理功能SMF接收PDU会话建立请求消息，所述PDU会话建立请求消息用于请求建立PDU会话；
    所述SMF获取所述PDU会话对应的会话标识，并将所述会话标识发送给接入网关功能AGF或用户设备；所述会话标识为所述PDU会话相关的接入会话的标识信息。
  23. 根据权利要求22所述方法，其特征在于，所述获取所述PDU会话对应的会话标识，并将所述会话标识发送给AGF或用户设备包括：
    所述SMF收到所述AGF分配所述会话标识后，向所述用户设备发送PDU会话建立成功消息，在所述PDU会话建立成功消息中包含所述会话标识；
    或者，所述SMF收到所述用户设备分配的所述会话标识后，向所述AGF发送SM信息，在所述SM信息中包含所述会话标识。
  24. 根据权利要求23所述方法，其特征在于，所述向所述AGF发送SM信息包括：
    所述SMF向所述AGF发送SM信息，在所述SM信息中包含虚拟局域网VLAN标签、通用路由封装GRE隧道标识、多协议标签交换MPLS标签、PPPoE会话标识或所述用户设备的互联网协议IP地址或用户设备的MAC地址地址中的至少一个。
  25. 根据权利要求22所述方法，其特征在于，所述会话标识包括：
    所述AGF的MAC地址、AGF的互联网协议IP地址、虚拟局域网VLAN标签、GRE隧道标识、多协议标签交换MPLS标签、以太网上的点对点协议PPPoE会话标识、用户设备的MAC地址以及所述用户设备的互联网协议IP地址中的至少一项。
  26. 根据权利要求22所述方法，其特征在于，所述方法还包括：
    所述SMF向所述用户设备发送PDU会话建立成功消息，在所述PDU会话建立成功消息中包含所述AGF的MAC地址、AGF的互联网协议IP地址、虚拟局域网VLAN标签、GRE隧道标识、多协议标签交换MPLS标签以及PPPoE会话标识中的至少一个。
  27. 一种用户设备，其特征在于，包括：用于执行权利要求1-10任意一项所述方法的单元。
  28. 一种接入网关功能设备，其特征在于，包括：用于执行权利要求11-21任意一项所述方法的单元。
  29. 一种会话管理功能设备，其特征在于，包括：用于执行权利要求22-26任意一项所述方法的单元。
PCT/CN2018/089974 2017-06-20 2018-06-05 会话管理方法、及装置 WO2018233484A1 (zh)

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