WO2012051897A1

WO2012051897A1 - System and method for integrating fixed network with mobile network

Info

Publication number: WO2012051897A1
Application number: PCT/CN2011/080063
Authority: WO
Inventors: 霍玉臻; 毕以峰
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-10-22
Filing date: 2011-09-22
Publication date: 2012-04-26
Also published as: CN102457444B; CN102457444A

Abstract

The invention provides a system and method for integrating a fixed network with a mobile network. For the fixed network which is in a bridging mode, a mobile archor gateway X-MAG is set for implementing a trusty non 3GPP access and connected between the fixed network and the mobile network; a Ya interface is set between a UE and a BNG/BRAS, a Yb interface is set between the BNG/BRAS and the X-MAG, and therefore the UE can, via the X-MAG through the fixed network which is in a bridging mode, access EPS of the mobile network with the trusty non 3GPP IP access mode. With the present invention, the UE can implement a trusty non 3GPP access with a simple and feasible mode, that is, the mobile network is accessed through the fixed network which is in the bridging mode or in the routing mode to integrate the fixed network with the mobile network.

Description

System and method for integrating fixed network and mobile network

The present invention relates to a fixed network and mobile network convergence technology, and more particularly to a system and method for converging a fixed network and a mobile network. Background technique

Figure 1 is a schematic diagram of an Evolved Packet System (EPS) architecture of the 3rd Generation Partnership Project (3GPP). As shown in Figure 1, the EPS is evolved by the Universal Mobile Telecommunications System (LTE) Terrestrial Radio Access Network. (Evolved Universal Terrestrial Radio Access Network, E-UTRAN), Mobility Management Entity (MME), Serving Gateway (S-GW), Packet Data Network Gateway (P-GW/) PDN GW), Home Subscriber Server (HSS), 3GPP Authentication and Authorization Accounting (3GPP AAA), Policy and Charging Rules Function (PCRF) entity, and other supporting nodes . The MME is responsible for control plane related operations such as mobility management, non-access stratum signaling processing, and user mobility management context management; the S-GW is an access gateway device connected to the E-UTRAN, in the E-UTRAN and The P-GW forwards data and is responsible for buffering the paging waiting data. The P-GW is a border gateway of the 3GPP evolved packet system and the Packet Data Network (PDN), which is responsible for implementing PDN access, And the ability to forward data between EPS and PDN.

In the EPS system, when the UE accesses through the E-UTRAN, the S-GW and the P-GW may use a General Data Transfer Platform (GTP) or a Proxy Mobile IPv6 (ΡΜΙΡνό) protocol; Moreover, the EPS system implements interworking with a non-3GPP network through an S2a/b/c interface, and the P-GW serves as an anchor point between the 3GPP and the non-3GPP network. As shown in FIG. 1 , the non-3GPP system is divided into a trusted non-3GPP IP access and an untrusted non-3GPP IP access, and the trusted non-3GPP IP access can directly interface with the P-GW through the S2a; The 3GPP IP access needs to be connected to the P-GW through an Evolved Packet Data Gateway (ePDG). The interface between the ePDG and the P-GW is S2b. The S2a interface supports the Mobile IPv4 (MIPv4) protocol and the PMIPv6 protocol; the S2b interface supports the PMIPv6 protocol; the S2c is the interface between the UE and the P-GW, and uses the Dual Stack Mobile IPv6 (DSMIPv6) protocol to provide control and mobility. Sexual management.

In the EPS system, the Policy and charging enforcement function (PCEF) exists in the P-GW, and the PCRF and the P-GW exchange information through the Gx interface. When the interface between the S-GW and the P-GW is based on the PMIPv6, the Bearer Binding and Event Reporting Function (BBERF) entity resides in the S-GW, and the S-GW and the PCRF pass through The Gxc interface exchanges information; when the UE accesses through the trusted non-3GPP IP access system, the BBERF is also resident in the trusted non-3GPP IP access gateway, and the trusted non-3GPP IP access gateway and the PCRF pass the Gxa interface. Exchange information.

2 is a schematic structural diagram of an existing fixed network. As shown in FIG. 2, the UE passes through a Routing Gateway (RG), an Access Network (AN), and a broadband network gateway/broadband remote access server (Broadband). Network Gateway/Broadband Remote Access Server, BNG〃BRAS) accesses the external network PDN. Here, the access network includes a network element such as a Digital Subscriber Line Access Multiplexer (DSLAM) and an Optical Network Terminal (ONT); the external network PDN may be the Internet. Or the carrier's corporate network. The UE can access the Broadband Forum AAA (BBF AAA) server through the BNG/BRAS to complete the access authentication and authentication; the BNG/BRAS obtains the bearer and charging control policy from the BPCF, and completes the connection to the fixed network. Management and billing of resources.

In a fixed network deployment, there are two deployment modes: 1) Routing mode, ie RG exists as a router. In this scenario, the UE accesses the RG through a WiFi AP (Wireless Fidelity Access Point WiFi access point) and accesses the BNG//BRAS through the AN. At this time, the IP address of the UE is allocated by the RG (for example: UE access RG, the user name and password are used to authenticate on the RG. The authentication succeeds RG to assign the internal address to the user;), and the IP address of the RG is allocated by the BRAS/BNG (for example, when the RG is powered on, the RG initiates authentication to the BRAS/BNG) BRAS/BNG allocates an address for the RG;), at which point the RG needs to perform IP address translation.

2) Bridge mode, ie RG exists as a bridge device. In this scenario, the UE accesses through the WiFi AP and accesses the BNG〃BRAS through the AN (of course, there may be an RG in it, but the RG at this time is only a Layer 2 device, and the user is not assigned an IP address, and the UE and The connection between the BRASs is a Layer 2 connection), at which point the IP address of the UE is allocated by the BRAS/BNG.

In order to facilitate the unified management of the mobile network and the fixed network, the operator hopes to achieve the convergence of the fixed network and the mobile network, so that the terminal can access the mobile and fixed convergence network from different access points through a unified identity. .

According to the above description of the mobile network and the fixed network, the fixed network can be accessed as a non-3GPP IP access mode of the mobile network EPS, and has different access modes such as S2a, S2b and S2c.

When the S2a access mode is adopted and the fixed network is in the routing mode, the mobility anchor gateway (X-MAG) is connected between the BNG/BRAS of the fixed network and the P-GW of the mobile network, and is used to implement the trusted non-3GPP connection. In. The UE and the X-MAG are connected through the Y interface, so that the UE can access the EPS of the mobile network through the X-MAG via the fixed network and the trusted non-3GPP access mode. The X-MAG is used to process control signaling of the UE accessing the mobile network, and to route data that the UE sends out or receives via the mobile network. FIG. 3 and FIG. 4 are respectively schematic diagrams of two network architectures for a UE to access a mobile network through a fixed network in a routing mode in the prior art. In FIG. 3, the X-MAG passes through a BBF AAA server in a fixed network, and a 3GPP AAA server or 3GPP AAA. The proxy is connected; in Figure 4, the X-MAG is directly connected to the 3GPP AAA or 3GPP AAA proxy. However, the architecture proposed in FIG. 3 and FIG. 4 is only applicable to the fixed network in the routing mode, and the fusion between the fixed network in the bridge mode and the mobile network through the S2a interface cannot be realized.

In addition, in order to implement the architecture proposed in FIG. 3 and FIG. 4, a simple UE that directly supports the PPP protocol on the IP layer to access the EPS through the X-MAG is used, but the method is not correct and cannot be implemented. Because PPP is a point-to-point protocol first, when there is BNG/BRAS in the path, PPP signaling cannot reach X-MAG. Secondly, according to the prior art, the PPP protocol cannot be directly carried on the IP layer. Therefore, there is currently no specific process for implementing the architecture proposed in Figure 3 and Figure 4. Summary of the invention

In view of this, the main object of the present invention is to provide a system and method for converging a fixed network and a mobile network, which enables a UE to access a mobile network through a fixed network in a bridging mode or a routing mode, thereby realizing convergence between a fixed network and a mobile network. .

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

A system for converging a fixed network and a mobile network, comprising: a fixed network, a mobile network, a mobile anchor gateway X-MAG, and a UE;

The X-MAG is connected between the broadband network gateway/broadband remote access server BNG/BRAS of the fixed network and the packet data network gateway P-GW of the mobile network, and is used for processing control signaling of the UE accessing the mobile network, and Routing data sent or received by the UE via the mobile network;

A Ya interface is set between the UE and the BNG/BRAS, and a Yb interface is set between the BNG/BRAS and the X-MAG.

The control plane protocol stack of the X-MAG includes at least an L1/L2 layer and an IP layer, and an L1/L2 layer is an underlying bearer layer; on the IP layer, a side connected to the P-GW is carried on the IP layer. The UDP layer and the PMIPv6 layer are connected to the BNG/BRAS side, and the UDP layer and the Yb control plane protocol layer are carried on the IP layer; correspondingly, the protocol stack on the Yb interface of the BNG/BRAS, IP a UDP layer and a Yb control plane protocol layer are set on the layer; a control plane protocol of the Ya interface of the UE In the stack, on the Ethernet/802.11 series protocol layer, the Ya control plane protocol is directly carried; correspondingly, the control plane protocol stack on the Ya interface of the BNG/BRAS directly carries the Ya control plane protocol on the Ethernet layer; The control plane protocol stack of the P-GW is the same as the control plane protocol stack of the side of the X-MAG connected to the P-GW.

The control signaling of the X-MAG processing UE accessing the mobile network is:

When the UE needs to send control plane signaling, the UE sends control plane signaling to the BNG/BRAS; after receiving the control plane signaling from the UE, the BNG/BRAS creates or searches for a correct tunnel for the user, and is responsible for The control plane signaling is encapsulated in the tunnel and forwarded to the X-MAG. After receiving the signaling from the BNG/BRAS, the X-MAG takes out the control plane signaling from the UE in the signaling, and performs corresponding Operation

When the X-MAG needs to send control plane signaling, the X-MAG encapsulates the control plane signaling in the tunnel and sends it to the BNG/BRAS through the correct tunnel; the BNG/BRAS receives the letter from the X-MAG After the command, the control plane signaling is taken out and forwarded to the UE; the UE performs corresponding operations according to the received control plane signaling.

The user plane protocol stack of the X-MAG includes at least an L1/L2 layer and an IP layer, and an L1/L2 layer is an underlying bearer layer. On the IP layer, a side connected to the P-GW is carried on the IP layer. The UDP layer and the PMIPv6 layer are connected to the BNG/BRAS side, and the UDP layer and the Yb user plane protocol layer are carried on the IP layer; correspondingly, the user plane protocol stack on the Yb interface of the BNG/BRAS is The UDP layer and the Yb user plane protocol layer are disposed on the IP layer; the user plane protocol stack of the Ya interface of the UE carries the Ya user plane protocol layer on the Ethernet/802.11 series protocol layer, and the Ya user plane protocol layer Hosting an IP layer; correspondingly, in the user plane protocol stack on the Ya interface of the BNG/BRAS, directly carrying the Ya user plane protocol on the Ethernet layer; the control plane protocol stack of the P-GW is in the The X-MAG connects to the uppermost layer of the user plane protocol stack on one side of the P-GW and then carries the IP layer.

The data sent or received by the X-MAG routing UE via the mobile network is: When the UE needs to send the user plane data, the uplink data packet encapsulates the IP address allocated by the 3GPP core network in the IP layer, and then is encapsulated by the Ya interface user plane protocol layer, and then forwarded to the BNG/BRAS; the YB interface user is performed by the BNG/BRAS. The surface protocol is encapsulated and transmitted to the X-MAG; the X-MAG decapsulates the uplink data packet, and decapsulates the Yb interface user plane protocol encapsulation and the Ya interface user plane protocol encapsulation, retains the inner layer IP address, and then encapsulates Passed into the tunnel and sent to the P-GW;

When the X-MAG needs to send user plane data, that is, downlink data received from the tunnel of the P-GW, for the downlink data, the X-MAG de-decapsulates the tunnel, retains the inner IP address, and then passes the Yb interface user plane protocol. After the encapsulation and the Ya interface user plane protocol are encapsulated, the BNG/BRAS is transmitted to the BNG/BRAS; after the BNG/BRAS is removed from the Yb interface user plane protocol encapsulation, the data packet is forwarded to the UE; after receiving the downlink data, the UE performs the downlink data. Decapsulation processing, the Ya interface user plane protocol encapsulation is removed, and then sent to the IP layer of the UE side for subsequent processing.

The fixed network is a fixed network in a bridge mode.

A method for merging a fixed network and a mobile network, comprising: X-MAG processing control signaling of a UE accessing a mobile network, and routing data sent or received by a UE via a mobile network, where the X-MAG is connected to a fixed network A Ya interface is set between the BNG/BRAS and the P-GW of the mobile network, and the YB interface is set between the BNG/BRAS and the X-MAG.

The control plane protocol stack of the X-MAG includes at least an L1/L2 layer and an IP layer, and an L1/L2 layer is an underlying bearer layer; on the IP layer, a side connected to the P-GW is carried on the IP layer. The UDP layer and the PMIPv6 layer are connected to the BNG/BRAS side, and the UDP layer and the Yb control plane protocol layer are carried on the IP layer; correspondingly, the control plane protocol stack on the Yb interface of the BNG/BRAS is The UDP layer and the Yb control plane protocol layer are disposed on the IP layer; the control plane protocol stack of the Ya interface of the UE directly carries the Ya control plane protocol on the Ethernet/802.11 series protocol layer; correspondingly, the BNG /BRAS on the Ya interface on the control plane protocol stack, in the Ethernet layer The control plane protocol stack of the P-GW is the same as the control plane protocol stack of the side of the X-MAG connected to the P-GW.

The user plane protocol stack of the X-MAG includes at least an L1/L2 layer and an IP layer, and an L1/L2 layer is an underlying bearer layer. On the IP layer, a side connected to the P-GW is carried on the IP layer. The UDP layer and the PMIPv6 layer are connected to the BNG/BRAS side, and the UDP layer and the Yb user plane protocol layer are carried on the IP layer; correspondingly, the user plane protocol stack on the Yb interface of the BNG/BRAS is The UDP layer and the Yb user plane protocol layer are disposed on the IP layer; the user plane protocol stack of the Ya interface of the UE carries the Ya user plane protocol layer on the Ethernet/802.11 series protocol layer, and the Ya user plane protocol layer The user plane protocol stack on the Ya interface of the BNG/BRAS, in the user plane protocol stack of the BNG/BRAS, directly carries the Ya user plane protocol on the Ethernet layer; the user plane protocol stack of the P-GW is in the The X-MAG connects to the uppermost layer of the user plane protocol stack on one side of the P-GW and then carries the IP layer.

The data sent or received by the X-MAG routing UE via the mobile network is:

When the UE needs to send the user plane data, the uplink data packet encapsulates the IP address allocated by the 3GPP core network in the IP layer, and is encapsulated by the user interface protocol layer of the Ya interface, and then forwarded to the BNG/BRAS; The BNG/BRAS is transmitted to the X-MAG after being encapsulated by the Yb interface user plane protocol; the X-MAG decapsulates the uplink data packet, and the Yb interface user plane protocol encapsulation and the Ya interface user plane protocol encapsulation are removed. , retaining the inner IP address, and then encapsulating it into the tunnel and sending it to the P-GW;

The fixed network is a fixed network in a bridge mode.

A method for merging a fixed network and a mobile network, comprising: X-MAG processing control signaling of a UE accessing a mobile network, and routing data sent or received by a UE via a mobile network, where the X-MAG is connected to a fixed network Between the BNG/BRAS and the P-GW of the mobile network, the UE and the X-MAG support the use of the L2TP protocol to carry PPP signaling.

The control plane protocol stack of the X-MAG includes at least an L1/L2 layer and an IP layer, and an L1/L2 layer is an underlying bearer layer; on the IP layer, a side connected to the P-GW is carried on the IP layer. The UDP layer and the PMIPv6 layer are connected to the UE. The UDP layer, the L2TP layer, and the PPP layer are carried on the IP layer. Correspondingly, in the protocol stack of the UE, the UDP layer and L2TP are set on the IP layer. Layer and PPP layer to implement PPP control signaling interaction between the UE and the X-MAG.

When the UE needs to send the control plane signaling, the UE creates or searches for the correct L2TP tunnel, and encapsulates the PPP signaling in the L2TP signaling and sends it to the X-MAG. The X-MAG receives the L2TP from the UE. After the signaling, the PPP signaling in the signaling is taken out, and corresponding operations are performed according to the content thereof; When the X-MAG needs to send the control plane signaling, the X-MAG encapsulates the PPP signaling in the L2TP signaling and sends the P2 signaling to the UE through the correct L2TP tunnel. After receiving the L2TP signaling from the X-MAG, the UE receives the L2TP signaling. It is necessary to extract PPP signaling from it and perform corresponding operations according to the received PPP signaling.

The user plane protocol stack of the X-MAG includes at least an L1/L2 layer and an IP layer, and an L1/L2 layer is an underlying bearer layer. On the IP layer, a side connected to the P-GW is carried on the IP layer. The UDP layer and the PMIPv6 layer are connected to the UE. The UDP layer, the L2TP layer, and the PPP layer are carried on the IP layer. In the user plane protocol stack of the UE, the UDP layer and the L2TP layer are set on the IP layer. And the PPP protocol layer carries the IP layer on the PPP layer; the user plane protocol stack of the P-GW further carries the IP layer at the uppermost layer of the user plane protocol stack on the side of the X-MAG connected to the P-GW.

The data sent or received by the X-MAG routing UE via the mobile network is:

When the UE needs to send the user plane data, the uplink data packet is encapsulated in the IP layer of the 3GPP core network, and then encapsulated in the PPP layer and the L2TP layer, and then sent to the X-MAG; the X-MAG pairs the uplink data packet. Perform decapsulation processing, remove the L2TP and PPP encapsulation, retain the inner IP address, and then encapsulate it into the tunnel and send it to the P-GW;

When the X-MAG needs to send user plane data, that is, when receiving downlink data from the tunnel of the P-GW, for the downlink data, the X-MAG de-decapsulates the tunnel, retains the inner IP address, and then enters both the PPP and the L2TP. After the layer is encapsulated, it is sent to the UE. After receiving the downlink data, the UE performs decapsulation processing, decapsulates the L2TP and PPP, and then sends the packet to the IP layer of the UE side for subsequent processing.

The fixed network is a fixed network in a routing mode.

The system and method for merging a fixed network and a mobile network, and for a fixed network in a bridge mode, setting a mobile anchor gateway X-MAG for implementing trusted non-3GPP access, connecting between a fixed network and a mobile network, A Ya interface is set between the UE and the BNG/BRAS, and a Yb interface is set between the BNG/BRAS and the X-MAG, so that the UE can access through the X-MAG via the fixed network in the bridge mode and in the trusted non-3GPP IP access mode. EPS for mobile networks. Fixed network for routing mode, based on existing architecture (as shown in Figure 3 and Figure 4), at the terminal and X-MAG The L2TP protocol is supported to carry PPP signaling. Through the invention, the UE can implement trusted non-3GPP access in a simple and feasible manner, that is, the fixed network can access the mobile network through the bridge mode or the routing mode, and realize the fusion of the fixed network and the mobile network. DRAWINGS

Figure 1 is a schematic diagram of an EPS architecture;

2 is a schematic diagram of a composition structure of an existing fixed network;

3 is a schematic diagram of a network architecture of a UE accessing a mobile network through a fixed network in a routing mode in the prior art;

4 is a schematic diagram of another network architecture in which a UE accesses a mobile network through a fixed network in a routing mode in the prior art;

5 is a schematic diagram of a control plane protocol stack of an X-MAG and its associated network element in a network architecture of a UE connected to a mobile network through a fixed network in a bridge mode;

6 is a schematic diagram of a user plane protocol stack of an X-MAG and its associated network element in a network architecture of a UE connected to a mobile network through a fixed network in a bridge mode;

7 is a schematic diagram of a control plane protocol stack of an X-MAG and its associated network element in a network architecture of a UE connected to a mobile network through a fixed network in a routing mode;

8 is a schematic diagram of a network architecture of a UE accessing a mobile network through a fixed network in a bridging mode according to Embodiment 1 of the present invention;

9 is a schematic diagram of a network architecture of a UE accessing a mobile network through a fixed network in a bridging mode according to Embodiment 2 of the present invention;

10 is a schematic diagram of a network architecture of a UE accessing a mobile network through a fixed network in a bridge mode according to Embodiment 3 of the present invention;

11 is a schematic diagram of a network architecture of a UE accessing a mobile network through a fixed network in a bridge mode according to Embodiment 4 of the present invention;

12 is a schematic diagram of a UE accessing a mobile network through a fixed network in a bridge mode according to Embodiment 5 of the present invention; Schematic diagram of the network architecture;

13 is a schematic diagram of a network architecture of a UE accessing a mobile network through a fixed network in a bridge mode according to Embodiment 6 of the present invention;

14 is a schematic flowchart of an implementation process of UE access/attachment in a network architecture of a UE connected to a mobile network through a fixed network in a bridging mode according to Embodiment 7 of the present invention;

15 is a schematic flowchart of implementing offline/de-attachment of a UE in a network architecture of a UE connected to a mobile network through a fixed network in a bridging mode according to Embodiment 8 of the present invention;

FIG. 16 is a schematic flowchart of a process for a UE to switch from a 3GPP IP access network to a fixed network in a network architecture of a fixed network accessing a mobile network in a bridging mode according to Embodiment 9 of the present invention; FIG. 17 is a schematic diagram of a UE according to Embodiment 10 of the present invention; A schematic diagram of an implementation process for establishing an additional PDN connection establishment in a network architecture of a fixed network access mobile network in a bridge mode;

FIG. 18 is a schematic flowchart of an implementation process of UE access/attachment in a network architecture of a UE that accesses a mobile network through a fixed network in a routing mode according to Embodiment 11 of the present invention;

19 is a schematic flowchart of implementing offline/de-attachment of a UE in a network architecture of a mobile network that accesses a mobile network by using a fixed network in a routing mode according to Embodiment 12 of the present invention;

FIG. 20 is a schematic flowchart of an implementation process of a UE switching from a 3GPP IP access network to a fixed network in a network architecture of a fixed network accessing a mobile network in a routing mode according to Embodiment 13 of the present invention; FIG. 21 is a UE according to Embodiment 14 of the present invention; A schematic diagram of an implementation process for establishing an additional PDN connection establishment in a network architecture of a fixed network access mobile network through a routing mode;

22 is a schematic diagram of a control plane protocol stack 2 of an X-MAG and its associated network element in a network architecture of a UE that accesses a mobile network through a fixed network in a routing mode according to the present invention;

FIG. 23a is a third schematic diagram of a control plane protocol stack of an X-MAG and its associated network element in a network architecture of a UE that accesses a mobile network through a fixed network in a routing mode;

FIG. 23b is a third schematic diagram of a user plane protocol stack of an X-MAG and its associated network element in a network architecture of a UE connected to a mobile network through a fixed network in a routing mode; FIG. 24 is a schematic diagram of a control plane protocol stack of an X-MAG and its related network elements in a network architecture of a UE connected to a mobile network through a fixed network in a routing mode according to the present invention. detailed description

The basic idea of the present invention is: for a fixed network in a bridging mode, a mobile anchor gateway X-MAG for implementing trusted non-3GPP access is connected between a fixed network and a mobile network, in the UE and BNG/BRAS The Ya interface is set, and the Yb interface is set between the BNG/BRAS and the X-MAG, so that the UE can access the EPS of the mobile network through the X-MAG via the fixed network in the bridge mode and the trusted non-3GPP IP access mode. For the fixed network of the routing mode, based on the existing architecture (as shown in Figure 3 and Figure 4), the L2TP protocol is supported on the terminal and the X-MAG to carry PPP signaling.

To facilitate the description of each interface, the two endpoint network elements of each interface are used as the names of each interface. For example: The interface between BNG/BRAS and BBF AAA can be called (BNG/BRAS-BBF AAA) interface. The interface between BNG/BRAS and BPCF can be called the (BNG/BRAS-BPCF) interface, and so on.

For a fixed network of a bridge mode, the present invention proposes a system for converging a fixed network and a mobile network, the system for the fixed fixed network and the mobile network comprises: a fixed network, a mobile network, a mobile anchor gateway (X-MAG) and a UE The X-MAG is connected between the fixed network and the mobile network for implementing trusted non-3GPP access, and the Ya interface is set between the UE and the BNG/BRAS of the fixed network, where the BNG/BRAS and the X-MAG are Setting the Yb interface to enable the UE to access the EPS of the mobile network in a trusted network through the X-MAG via the bridge mode, and the X-MAG, for processing the UE access mobile Control signaling of the network, and routing data that the UE sends or receives over the mobile network.

Specifically, the X-MAG is connected between the BNG/BRAS of the fixed network and the P-GW of the mobile network, and the Ya and Yb interfaces are provided; and the UE has the function of supporting the Ya interface, and the UE and the BNG/BRAS Interworking through the Ya interface, passing between BNG/BRAS and X-MAG The Yb interface is used for interworking; the X-MAG is configured to process control signaling of the UE accessing the mobile network, and route data that the UE sends or receives via the mobile network. Based on the set X-MAG network element, the network system of the present invention supports user access/attachment, multi-PDN connection establishment, user offline/de-attachment, and user switching operations between the 3GPP access network and the fixed network.

To implement signaling and data transmission between the X-MAG and the UE, it is necessary to set a protocol stack of each network element in the system. On the Ya and Yb interfaces, the control plane protocol and the user plane protocol are respectively set. The protocol can adopt various existing protocols. The present invention uses the PPP protocol as an example to describe the setting of the protocol stack. Since PPP is a point-to-point protocol, when there is a BNG/BRAS between the UE and the X-MAG, PPP signaling cannot directly interact between the UE and the X-MAG. To solve this problem, L2TP can be used to carry PPP signaling. In the present system, the protocol stacks of the UE, the RG, the BNG/BRAS, the X-MAG, and the P-GW are respectively set as shown in FIG. 5 and FIG. 6, wherein FIG. 5 is a fixed network access of the UE in the bridge mode according to the present invention. Schematic diagram of the control plane protocol stack of the X-MAG and its related network elements in the network architecture of the mobile network, FIG. 6 is a schematic diagram of the X-MAG and its related network elements of the UE under the network structure of the fixed network accessing the mobile network through the bridge mode Schematic diagram of the user plane protocol stack. Specifically, as shown in FIG. 5, the control plane protocol stack of the X-MAG includes at least an L1/L2 (Layer 1/Layer 2) layer and an IP layer, and the L1/L2 layer is an underlying bearer layer; On one side of the P-GW, the UDP layer and the PMIPv6 layer are carried over the IP layer. That is, the X-MAG and the P-GW interact with each other over the IP layer; the side that connects the BNG/BRAS The UDP layer and the Yb control plane protocol layer (such as the L2TP layer and the PPP layer) are carried on the IP layer. Correspondingly, in the protocol stack on the Yb interface on the BNG/BRAS side, a UDP layer and a Yb control plane protocol layer (such as an L2TP layer and a PPP layer) are set on the IP layer to implement forwarding between the UE and the X-MAG. Control signaling (such as PPP). Ya control plane protocol stack interface of the UE in the Ethernet / 802.11 family protocol layers, directly bearing Ya control plane protocols (e.g., PPP protocol) ₀ corresponding to the control plane protocol stack on Ya interface BNG / BRAS side In the Ethernet layer, the Ya control plane protocol (such as the PPP protocol) is directly carried; the control plane protocol stack of the P-GW and the X-MAG are connected to the side of the P-GW. The interface protocol stack is the same.

For control plane transmission, the UE sends control plane signaling to the BNG/BRAS. After receiving the control plane signaling from the UE, the BNG/BRAS can create or find the correct tunnel for the user, and is responsible for encapsulating the PPP signaling in the tunnel. Forwarding to the X-MAG; after receiving the signaling from the BNG/BRAS, the X-MAG needs to take out the control plane signaling from the UE in the signaling and perform operations according to its content (such as authentication, establishing PMIPv6). Binding, etc.). When the X-MAG needs to send control plane signaling

(When the authentication process, ΡΜΙΡνό binding process, etc. need to perform signaling interaction with the UE), the X-MAG can encapsulate the control plane signaling in the tunnel and send it to the BNG/BRAS through the correct tunnel; BNG/ After receiving the signaling from the X-MAG, the BRAS takes out the control plane signaling and forwards it to the UE. The UE performs corresponding operations according to the received control plane signaling.

Specifically, when the PPP protocol is adopted, the UE sends PPP signaling to the BNG/BRAS for the control plane transmission; after receiving the PPP control plane signaling from the UE, the BNG/BRAS needs to create or find the correct L2TP tunnel for the user. And the PPP signaling is encapsulated in the L2TP signaling and forwarded to the X-MAG. After receiving the L2TP signaling from the BNG/BRAS, the X-MAG needs to take out the PPP signaling in the signaling, and according to the content thereof. Perform operations (such as authentication, establishing PMIPv6 bindings, etc.). When the X-MAG needs to send control plane signaling (such as the authentication process, ΡΜΙΡνό binding process, etc.), the X-MAG encapsulates the signaling in the L2TP signaling and passes The correct L2TP tunnel is sent to the BNG/BRAS. After receiving the BNG/BRAS, the PPP signaling is taken out and forwarded to the UE. The UE performs corresponding operations according to the received PPP signaling.

Figure 6 shows the user plane protocol stack of the X-MAG and its associated network elements. As shown in Figure 6, the user plane protocol stack of each network element is basically the same as the control plane protocol stack, but only for the UE and the P-GW. It also carries a layer of IP. Specifically, the X-MAG user plane protocol stack includes at least an L1/L2 layer and an IP layer, and an L1/L2 layer is an underlying bearer layer. On the IP layer, a side connected to the P-GW is carried on the IP layer. The UDP layer and the PMIPv6 layer; the side that connects to the BNG/BRAS, carried on the IP Above the layer is the UDP layer and the Yb user plane protocol layer; correspondingly, in the protocol stack on the Yb interface of the BNG/BRAS, the UDP layer and the Yb control plane protocol layer are set on the IP layer; the Ya interface of the UE In the user plane protocol stack, the Ya user plane protocol layer is carried on the Ethernet/802.11 series protocol layer, and the Ya user plane protocol layer carries the IP layer; correspondingly, in the user plane protocol stack on the Ya interface of the BNG/BRAS, On the Ethernet layer, the Ya user plane protocol is directly carried; the control plane protocol stack of the P-GW is to carry the IP layer at the uppermost layer of the user plane protocol stack on the side of the X-MAG connection P-GW.

For the user plane transmission, on the UE side, the uplink data packet is encapsulated in the IP layer by the IP address assigned by the 3GPP core network, and then encapsulated by the Ya interface user plane protocol layer, and then forwarded to the BNG/BRAS; and then the BNG/BRAS is used for the Yb interface user. The face protocol is encapsulated and transmitted to the X-MAG; the X-MAG decapsulates the upstream data packet from the UE, unpacks the Yb interface user plane protocol encapsulation and the Ya interface user plane protocol encapsulation, retains the inner layer IP address, and then encapsulates It is sent to the P-GW in the tunnel. For the downlink data from the tunnel of the P-GW, the X-MAG de-encapsulates the tunnel, retains the inner IP address, and then encapsulates it through the Yb interface user plane protocol encapsulation and the Ya interface user plane protocol, and then transmits it to the BNG/BRAS; BNG/ After the BRAS is removed from the Yb interface user plane protocol encapsulation, the data packet is forwarded to the UE. After receiving the downlink data from the X-MAG, the BPDU is decapsulated, and the Ya interface user plane protocol encapsulation is performed, and then sent to the UE. The IP layer on the side is processed for subsequent processing.

Specifically, when the PPP protocol is used, for the user plane transmission, on the UE side, the uplink data packet is encapsulated in the IP layer by the IP address allocated by the 3GPP core network, and then encapsulated by the PPP layer and forwarded to the BNG/BRAS; The BRAS is transmitted to the X-MAG after L2TP encapsulation; the X-MAG decapsulates the uplink data packet from the UE, decapsulates the L2TP and PPP encapsulation, retains the inner IP address, and then encapsulates it into the tunnel and sends it to the P-GW. . For the downlink data from the tunnel of the P-GW, the X-MAG de-tunes the tunnel encapsulation, retains the inner IP address, and then passes through the PPP and L2TP two-layer encapsulation, and then transmits it to the BNG/BRAS; after the BNG/BRAS is removed from the L2TP encapsulation , will data The packet is forwarded to the UE; after receiving the downlink data from the X-MAG, the UE performs decapsulation processing, de-PPP encapsulation, and then sends the packet to the IP layer of the UE side for subsequent processing.

Based on the settings of UE, BNG/BRAS and X-MAG control plane and user plane protocol stack, X-MAG supports connection with UE, P-GW, BNG/BRAS, and supports MAG function in PMIPv6 protocol to implement packet routing and forwarding. Features;

X-MAG also supports L2TP protocol and PPP protocol to implement user authentication, data packet routing and forwarding.

The X-MAG can also receive the trigger signaling/access request signaling sent by the UE, and establish a correspondence between the L2TP tunnel, the PPP session, and the PMIPv6 tunnel for the user.

When the X-MAG receives the trigger signaling/access request signaling sent by the UE, it can parse the parameters carried in the received signaling, and can also send a lifetime zero (PBU) message to the P-GW, and the PBU The message carries all the parameters in the access request signaling. Correspondingly, the trigger signaling/access request signaling sent by the UE to the X-MAG may or may not carry the IP address and terminal acquired by the UE on the fixed network. The identifier, the access network identifier, and the like; the UE further receives an access request response message;

The X-MAG can also receive the offline request message sent by the UE, and parse the parameters carried in the message, and send the PBU message to the P-GW. The PBU message carries the parameters in all/part of the access request message; correspondingly, the UE Sending an offline request message to the X-MAG, which may carry parameters such as a terminal identifier and an access network identifier, and the UE also receives an offline request response message;

The X-MAG can also receive a Binding Revocation Indication (BRI) message sent by the P-GW, and parse the parameters carried in the message, and send a corresponding disconnect request to the UE.

In addition, the X-MAG can also implement the P-GW selection function; the X-MAG is also responsible for address forwarding and delivery in the UE's IPv4 address and IPv6 address prefix allocation process;

The X-MAG can be directly connected to the 3GPP AAA/3GPP AAA Proxy (Proxy) or connected to the 3GPP AAA/3GPP AAA Proxy via the BBF AAA server/proxy. Now based on 3GPP user access authentication, and as an authenticator, correspondingly, the UE supports 3GPP-based user access authentication. The connection between the specific X-MAG and the 3GPP AAA/3GPP AAA proxy or the BBF AAA server/proxy may be implemented by using a protocol stack corresponding to the connected network element, and how the protocol stack is set as the prior art.

Based on the control plane protocol stack and user plane protocol stack settings, the Ya interface supports the PPP protocol; the Yb interface supports the L2TP protocol stack and the PPP protocol stack; supports the encapsulation/decapsulation of data packets; supports access request/response signaling, and offline requests. / Transmission of signaling such as response signaling. The support encapsulation refers to: for the uplink data packet, the UE encapsulates the data packet by using the IP address allocated by the 3GPP core network, and then fixes the IP address assigned by the network on the outer package; after the data reaches the X-MAG, X- The MAG strips the outermost IP address and encapsulates it into the PMIPv6 tunnel between the X-MAG and the P-GW and sends it to the P-GW. The support decapsulation refers to: For the downlink data packet, the P-GW After the X-MAG is removed, the X-MAG removes the PMIP tunnel header of the data, and encapsulates the local IP address allocated by the fixed network in the outer layer of the data packet, and routes the packet to the UE. After receiving the data packet, the UE sequentially strips the data packet. The IP addresses of the outer and outer outer layers get the payload.

For the uplink data packet, the UE encapsulates the data packet by using the IP address allocated by the 3GPP core network, and then encapsulates the data packet through the PPP layer; after the data arrives at the BNG/BRAS, the BNG/BRAS performs the L2TP encapsulation; after the data reaches the X-MAG, the X-MAG The L2TP and PPP encapsulation are removed, and the inner IP address is reserved, and then encapsulated into the PMIPv6 tunnel between the X-MAG and the P-GW and sent to the P-GW. For downlink data, X-MAG removes the PMIP tunnel header of the data packet, retains the inner IP address, and then encapsulates it through PPP and L2TP. After the data arrives at BNG/BRAS, the BNG/BRAS removes the L2TP encapsulation and then the packet. Forwarding to the UE; after receiving the data packet, the UE removes the PPP encapsulation, strips the IP address, and obtains a payload.

It should be noted that: X-MAG, Ya interface, and Yb interface are referred to herein as a name for a specific gateway and interface in the present invention. In actual applications, any other name may be used. Calling, as long as the corresponding function works the same. In a specific implementation, the X-MAG may be implemented by using a server, or may add the functions described above to the existing mobile anchor gateway.

In a practical application, the mobile network may be an EPS, and includes a roaming scenario and a non-roaming scenario; in a non-roaming scenario, the mobile network is referred to as a local network; in a roaming scenario, the mobile network is classified into a home network. And the visited network; correspondingly, the X-MAG is connected to the fixed network and the mobile network, and the network convergence architecture is configured in different ways, which are applicable to the non-roaming scene and the roaming scene respectively.

Corresponding to the above-mentioned system for converging fixed network (bridge mode) and mobile network, the present invention also provides a method for converging a fixed network and a mobile network, the method comprising: X-MAG processing UE control signaling for accessing the mobile network, and routing The data sent or received by the UE over the mobile network, the fixed network is a fixed network in a bridge mode, the X-MAG is connected between the BNG/BRAS of the fixed network and the P-GW of the mobile network, the UE and the BNG A Ya interface is set between the /BRAS, and a Yb interface is set between the BNG/BRAS and the X-MAG.

The control plane protocol stack of the X-MAG includes at least an L1/L2 layer and an IP layer, and an L1/L2 layer is an underlying bearer layer; on the IP layer, a side connected to the P-GW is carried on the IP layer. The UDP layer and the PMIPv6 layer are connected to the BNG/BRAS side, and the UDP layer and the Yb control plane protocol layer are carried on the IP layer; correspondingly, the protocol stack on the Yb interface of the BNG/BRAS, IP The UDP layer and the Yb control plane protocol layer are disposed on the layer; the control plane protocol stack of the Ya interface of the UE directly carries the Ya control plane protocol on the Ethernet/802.11 series protocol layer; correspondingly, the BNG/BRAS In the control plane protocol stack on the Ya interface, on the Ethernet layer, directly bear the Ya control plane protocol; the control plane protocol stack of the P-GW and the control plane protocol of the side of the X-MAG connected to the P-GW The stack is the same.

When the UE needs to send control plane signaling, the UE sends control plane signaling to the BNG/BRAS; after receiving the control plane signaling from the UE, the BNG/BRAS creates or searches for the correct user. Tunneling, and is responsible for encapsulating the control plane signaling in the tunnel and forwarding it to the X-MAG; after receiving the signaling from the BNG/BRAS, the X-MAG sends control plane signaling from the UE in the signaling Take out and perform the corresponding operation;

The data sent or received by the X-MAG routing UE via the mobile network is:

When the UE needs to send the user plane data, the uplink data packet encapsulates the IP address allocated by the 3GPP core network in the IP layer, and then is encapsulated by the Ya interface user plane protocol layer, and then forwarded to the BNG/BRAS; the YB interface user is performed by the BNG/BRAS. After the facet protocol is encapsulated and transmitted to the X-MAG; the X-MAG decapsulates the uplink data packet from the UE, and decapsulates the Yb interface user plane protocol encapsulation and the Ya interface user plane protocol encapsulation, and retains the inner layer IP address, and then Encapsulated into the tunnel and sent to the P-GW;

When the X-MAG needs to send user plane data, that is, when receiving downlink data from the tunnel of the P-GW, For the downlink data of the tunnel from the P-GW, the X-MAG is de-encapsulated, and the inner IP address is reserved, and then encapsulated by the Yb interface user plane protocol encapsulation and the Ya interface user plane protocol, and then transmitted to the BNG/BRAS; After the BNG/BRAS is decapsulated by the Yb interface user plane protocol, the data packet is forwarded to the UE; after the downlink data received by the UE from the X-MAG, the decapsulation process is performed, and the Ya interface user plane protocol encapsulation is removed. Then, it is sent to the IP layer of the UE side for subsequent processing.

For the fixed network of the routing mode, in order to solve the problem that the PPP signaling cannot directly interact between the UE and the X-MAG, the present invention provides a method for converging a fixed network (routing mode) and a mobile network, so that the UE can be in FIG. Under the architecture proposed in Figure 4, trusted non-3GPP access can be implemented in a simple and feasible manner. The basic idea is: X-MAG processes the control signaling of the UE accessing the mobile network, and routes the data sent or received by the UE via the mobile network, and the X-MAG is connected to the BNG/BRAS of the fixed network and the P of the mobile network. - between the GW, the UE and the X-MAG support the use of the L2TP protocol to carry PPP signaling, and FIG. 7 is a schematic diagram of the X-MAG of the UE under the network architecture of the mobile network through the fixed mode of the routing mode A schematic diagram of a control plane protocol stack of a related network element, as shown in FIG.

The control plane protocol stack of the X-MAG includes at least the L1/L2 (Layer 1 / Layer 2) layer and the IP layer, and the L1/L2 layer is the underlying bearer layer; on the IP layer, the side connected to the P-GW is carried on Above the IP layer is the UDP layer and the PMIPv6 layer. That is to say, the X-MAG and the P-GW interact with each other through the PMIPv6 over the IP layer; the side connected to the UE is carried over the IP layer by the UDP layer. , L2TP layer, PPP layer. Correspondingly, in the protocol stack of the UE side, the UDP layer, the L2TP layer, and the PPP layer are set on the IP layer to implement PPP control signaling interaction between the UE and the X-MAG.

For control plane transmission, the UE needs to create or find the correct L2TP tunnel for the user, and encapsulates the PPP signaling in the L2TP signaling and sends it to the X-MAG. After receiving the L2TP signaling from the UE, the X-MAG needs to The PPP signaling in the signaling is taken out and operated according to its content (for example, authentication, establishment of PMIPv6 binding, etc.). When the X-MAG needs to send control plane signaling (eg, The X-MAG encapsulates the PPP signaling in the L2TP signaling and sends it to the UE through the correct L2TP tunnel. The UE receives the X-X from the X-MAG. After the L2TP signaling of the MAG, the PPP signaling needs to be taken out from the MAG and the corresponding operations are performed according to the received PPP signaling.

The user plane protocol stack of the X-MAG includes at least the L1/L2 layer and the IP layer, and the L1/L2 layer is the underlying bearer layer. On the IP layer, the side connected to the P-GW is carried on the IP layer. The UDP layer, the L2TP layer, and the PPP are set on the IP layer. The protocol layer carries the IP layer on the PPP layer; the user plane protocol stack of the P-GW further carries the IP layer on the uppermost layer of the user plane protocol stack on the side of the X-MAG connection P-GW.

For the user plane transmission, on the UE side, the uplink data packet is encapsulated in the IP layer by the IP layer, and then encapsulated in the PPP layer and the L2TP layer, and then sent to the X-MAG; the X-MAG uplinks from the UE. The data packet is decapsulated, and the L2TP and PPP encapsulation are removed, and the inner IP address is reserved, and then encapsulated into the tunnel and sent to the P-GW. For the downlink data from the tunnel of the P-GW, the X-MAG de-encapsulates the tunnel, retains the inner IP address, and then passes through the PPP and L2TP two-layer encapsulation, and then sends the packet to the UE; the UE receives the downlink from the X-MAG. After the data is decapsulated, the L2TP and PPP encapsulation are performed, and then sent to the IP layer of the UE side for subsequent processing.

Based on the network architecture of FIG. 3 and FIG. 4, the scenario in which the UE accesses the mobile network has different processes according to different operations of the UE, such as: UE access/attachment process, UE offline/de-attachment process, and UE connection from 3GPP IP. The process of switching from the network to the fixed network, and the process of establishing an additional PDN connection. The UE access/attach procedure, the UE offline/de-attachment procedure, the UE handover process from the 3GPP IP access network to the fixed network, and the establishment of an additional PDN are respectively described in detail below with reference to FIG. 18 to FIG. 21 respectively. The process of the connection, the various processing flows are applicable to various network architectures of roaming and non-roaming scenarios. Among them, the BBF AAA in the figure refers to the BBF AAA service. Server / agent.

The implementation of the technical solution of the present invention will be further described in detail below with reference to specific embodiments. Example 1

FIG. 8 is a schematic diagram of a network architecture of a UE accessing a mobile network through a fixed network in a bridging mode according to Embodiment 1 of the present invention. As shown in FIG. 8 , in this embodiment, a UE accesses an EPS core network through a fixed network in a bridging mode. The fixed network is a trusted non-3GPP access of the EPS, and the network architecture shown in FIG. 8 is a network architecture of a non-roaming scenario. In this embodiment, the X-MAG is connected to the 3GPP AAA through a BBF AAA server/proxy (Server/Proxy) to implement user access authentication based on 3GPP AAA.

In this embodiment, the X-MAG is set between the P-GW of the mobile network and the BNG/BRAS of the fixed network, supports the MAG function in the PMHV6 protocol, supports the L2TP protocol and the PPP protocol, and passes the Yb interface and the BNG/BRAS. Connection, BNG/BRAS is connected to the UE through the Ya interface; the control plane protocol stack and user protocol stack settings of X-MAG, BNG/BRAS and UE are respectively shown in Figure 5 and Figure 6, and the control plane protocol stack on the Yb interface and The L2TP layer and the PPP layer are respectively disposed on the IP layer of the user protocol stack, and the PPP layer is respectively disposed on the control plane protocol stack of the Ya interface and the Ethernet layer of the user plane protocol stack, respectively, for implementing X-MAG and UE respectively. Control signaling and transmission of user data.

In actual application, when the UE sends data out via the mobile network, the UE sends the data to the BNG/BRAS, and the BNG/NRAS forwards the data to the X-MAG through the L2TP tunnel, and sends the data to the mobile network side via the X-MAG; or, when the UE When receiving data from the mobile network side, the X-MAG forwards the data from the mobile network side to the BNG/BRAS through the L2TP tunnel, and the BNG/BRAS forwards the data to the UE.

When the UE exchanges control information with the mobile network, the UE sends the control signaling carrying the control information to the X-MAG through the BNG/BRAS, triggering the X-MAG to initiate related operations in the mobile network; or, the X-MAG receives the information from the X-MAG. After the signaling of the mobile network side network element or its own event is triggered, After the BNG/BRAS, the downlink control signaling is sent to the UE.

Specifically, the sending data by the UE via the mobile network is: the UE encapsulates the uplink data with the IP address allocated by the 3GPP core network as the inner layer source IP address and the communication peer IP address as the destination IP address, and then performs PPP encapsulation. And then forwarded to the BNG/BRAS; the BNG/BRAS forwards the received uplink data packet to the X-MAG after L2TP encapsulation; the X-MAG receives the uplink data packet from the UE, and releases the L2TP and PPP encapsulation, and retains The inner source IP address and the destination IP address are encapsulated into a ΡΜΙΡνό tunnel and sent to the P-GW.

The UE accepts data from the mobile network side: X-MAG de-packs the downlink data into PMIPv6 encapsulation, retains the inner source IP address and destination IP address, and then enters the PPP and L2TP two-layer encapsulation and forwards it to BNG/BRAS; BNG After receiving the downlink data packet, the /BRAS forwards the data packet to the UE after the L2TP encapsulation; the UE extracts the downlink data from the X-MAG, decapsulates the PPP encapsulation, strips the inner IP address, and obtains the payload.

The UE sends the control signaling carrying the control information to the X-MAG through the BNG/BRAS, and triggers the X-MAG to initiate the related operations in the mobile network as follows: the UE sends the PPP signaling to the BNG/BRAS; the BNG/BRAS receives the UE from the UE. After the PPP control plane signaling, the user needs to create or find the correct L2TP tunnel for the user, and is responsible for encapsulating the PPP signaling in the L2TP signaling and forwarding it to the X-MAG. The X-MAG receives the L2TP letter from the BNG/BRAS. After the command, the PPP signaling in the signaling needs to be taken out and operated according to its content (for example, authentication, establishment of PMIPv6 binding, etc.).

After receiving the signaling trigger from the mobile network side network element or its own event, the X-MAG sends the downlink control signaling to the UE: X-MAG receives the signaling from the P-GW and/or 3GPP AAA of the mobile network side. The triggering, or the signaling trigger of the own event, when the control plane signaling needs to be sent (for example, when the authentication process, the PMIPv6 binding process, and the like need to perform signaling interaction with the UE), the X-MAG encapsulates the PPP signaling in the In the L2TP signaling, it is sent to the BNG/BRAS through the correct L2TP tunnel. After receiving the BNG/BRAS, the PPP signaling is taken out and forwarded to the UE. The UE performs corresponding operations according to the received PPP signaling. The uplink control signaling may be: a PPP LCP configuration request sent by the UE to the X-MAG, or a PPP NCP configuration request, or a PPP LCP termination request, or a PPP NCP termination request, and the like. ;

The downlink control signaling may be: a PPP NCP configuration response sent by the X-MAG to the UE, or a PPP LCP configuration response, or a PPP LCP termination response, or a PPP NCP termination response, and the like. Example 2

9 is a schematic diagram of a network architecture of a UE accessing a mobile network through a fixed network in a bridging mode according to Embodiment 2 of the present invention. As shown in FIG. 9, in this embodiment, a UE accesses an EPS core network through a fixed network in a bridge mode. The fixed network is a trusted non-3GPP access of the EPS, and the network architecture shown in FIG. 9 is a network architecture of a non-roaming scenario.

The difference from the first embodiment is as follows: In this embodiment, the X-MAG is not connected to the 3GPP AAA through the BBF AAA server/proxy, but is directly connected to the 3GPP AAA to implement user access authentication based on 3GPP AAA. In addition, other aspects of the present embodiment (protocol stack setting, interface function, control signaling interaction, and uplink and downlink data transmission processes, etc.) are the same as those described in Embodiment 1, and are not used herein. A detailed description. Example 3

10 is a schematic diagram of a network architecture of a UE accessing a mobile network through a fixed network in a bridge mode according to Embodiment 3 of the present invention. As shown in FIG. 10, in this embodiment, a UE accesses an EPS core network through a fixed network in a bridge mode. The fixed network is a trusted non-3GPP access of the EPS. The network architecture shown in Figure 10 is a network architecture of roaming scenarios and home routes, including home public land mobile network (hPLMN) and visited PLMN (vPLMN). BPCF is connected by hPCRF and hPCRF, and vPCRF and hPCRF are roamed. The interface S9 interface is connected; the BBF AAA server/proxy is connected to the 3GPP AAA through the 3GPP AAA proxy, and the HSS; correspondingly, in this embodiment, the X-MAG passes the BBF AAA service. The device/proxy is connected to the 3GPP AAA proxy and 3GPP AAA to implement 3GPP AAA-based user access authentication.

In this embodiment, the P-GW is selected to be placed in the home network, and the X-MAG is connected to the P-GW through the roaming interface. Here, the roaming interface is an S2a interface.

The various aspects of the present embodiment (the protocol stack setting, the interface function, the control signaling interaction, and the transmission process of the uplink and downlink data, etc.) are the same as those described in Embodiment 1, and will not be described in detail herein. Example 4

11 is a schematic diagram of a network architecture of a UE accessing a mobile network through a fixed network in a bridging mode according to Embodiment 4 of the present invention. As shown in FIG. 11, in this embodiment, a UE accesses an EPS core network through a fixed network in a bridging mode. The fixed network is a trusted non-3GPP access of the EPS. The network architecture shown in Figure 11 is the network architecture of the roaming scenario and home routing, including hPLMN and vPLMN. The P-GW is selected to be placed in the home network, and the X-MAG is connected to the P-GW through the roaming interface S2a interface. The BPCF passes the vPCRF and hPCRF. Connected, the vPCRF and hPCRF are connected through the roaming interface S9 interface.

The difference from Embodiment 3 is: In this embodiment, the X-MAG is not connected to the 3GPP AAA proxy and the 3GPP AAA through the BBF AAA server/proxy, but is directly connected to the 3GPP AAA through the 3GPP AAA proxy to implement the 3GPP AAA-based user. Access authentication, correspondingly, the BBF AAA server/proxy is not connected to the 3GPP AAA Proxy.

The various aspects of the present embodiment (the protocol stack setting, the interface function, the control signaling interaction, and the transmission process of the uplink and downlink data, etc.) are the same as those described in Embodiment 2, and will not be described in detail herein. Example 5

12 is a schematic diagram of a UE accessing a mobile network through a fixed network in a bridge mode according to Embodiment 5 of the present invention; Schematic diagram of the network architecture, as shown in FIG. 12, in this embodiment, the UE accesses the EPS core network through a fixed network, where the fixed network serves as a trusted non-3GPP access of the EPS. The network architecture shown in FIG. 12 is basically the same as that in the third embodiment, including hPLMN and vPLMN. The BPCF is connected to the hPCRF through the vPCRF, and the vPCRF and the hPCRF are connected through the roaming interface S9 interface; the BBF AAA server/proxy is connected to the 3GPP AAA and the HSS through the 3GPP AAA Proxy; In this embodiment, the X-MAG is connected to the 3GPP AAA proxy and the 3GPP AAA through the BBF AAA server/proxy to implement user access authentication based on 3GPP AAA.

The difference between this embodiment and the embodiment 3 is that the P-GW in this embodiment is selected to be placed in the visited network, and the X-MAG is connected to the P-GW through the local interface.

The various aspects of the present embodiment (the protocol stack setting, the interface function, the control signaling interaction, and the transmission process of the uplink and downlink data, etc.) are the same as those described in Embodiment 1, and will not be described in detail herein. Example 6

13 is a schematic diagram of a network architecture of a UE accessing a mobile network through a fixed network in a bridging mode according to Embodiment 6 of the present invention. As shown in FIG. 13, in this embodiment, a UE accesses an EPS core network through a fixed network in a bridge mode. The fixed network is a trusted non-3GPP access of the EPS. The network architecture shown in Figure 13 is basically the same as that in Embodiment 5, including hPLMN and vPLMN. The P-GW is selected to be placed in the visited network, and the X-MAG is connected to the P-GW through the local interface. The BPCF is connected to the hPCRF through the vPCRF, vPCRF and hPCRF. Connected through the S9 interface of the roaming interface.

The difference from Embodiment 5 is: In this embodiment, the X-MAG is not connected to the 3GPP AAA proxy and the 3GPP AAA through the BBF AAA server/proxy, but is directly connected to the 3GPP AAA through the 3GPP AAA proxy, and implements the 3GPP AAA-based user. Access authentication, correspondingly, the BBF AAA server/proxy is not connected to the 3GPP AAA Proxy.

The various aspects of the embodiment (the protocol stack setting, the interface function, the control signaling interaction, and the transmission process of the uplink and downlink data, etc.) are the same as the functions and principles described in Embodiment 2. It will not be described in detail here.

Based on the foregoing various network architectures, the scenario in which the UE accesses the mobile network has different processes according to the operation of the UE, such as: UE access/attachment process, UE offline/de-attachment process, and UE from the 3GPP IP access network. The process of switching to a fixed network, the process of establishing an additional PDN connection, and the like. The process of the UE access/attach process, the UE offline/de-attachment process, the UE handover from the 3GPP IP access network to the fixed network, and the process of establishing an additional PDN connection are respectively described in detail below with reference to FIG. 14 to FIG. The process is applicable to various network architectures for roaming, non-roaming scenarios. Among them, the BBF AAA in the figure refers to the BBF AAA server/agent. Example 7

14 is a schematic diagram of an implementation process of UE access/attachment in a network architecture of a UE connected to a mobile network through a fixed network in a bridging mode according to Embodiment 7 of the present invention, where the network architecture may be as shown in any of FIG. 8 to FIG. . Specifically, the UE access/attach procedure of the present invention includes the following steps: Step 1401: The UE sends a PPP Link Control Protocol (LCP) configuration request to the BNG/BRAS through the Ya interface, and performs PPP LCP negotiation with the BNG/BRAS. .

The PPP LCP configuration request in this embodiment belongs to an access/attach request.

Step 1402: The BNG/BRAS initiates access authentication to the BBF AAA. Here, the PAP or CHAP or EAP-AKA may be used to complete the access authentication of the fixed network to the user.

At the same time, the BNG/BRAS needs to obtain the L2TP attribute of the UE in this step, that is, whether the PPP session of the UE is terminated in the X-MAG, and whether the establishment of the L2TP tunnel needs to be started. When the user is a 3GPP user, the PPP is terminated in the X-MAG, and an L2TP tunnel between the BNG/BRAS and the X-MAG needs to be established.

The BBF AAA finds that it is a 3GPP user. When the PPP is terminated in the X-MAG, the user PPP is returned to the X-MAG to the BNG/BRAS. Or configure the L2TP attribute of the user on the BNG/BRAS. You no longer need to query the BBF AAA. In this scenario, the access authentication of the fixed network may not be completed or will not be started. Step 1403: After the fixed network access authentication is successfully completed in step 1402, the BNG/BRAS initiates a fixed network policy session establishment request to the BPCF, and the BNG/BRAS and the BPCF establish a session for applying/delivering a dynamic policy, so as to allocate network resources and User acceptance enables accurate control.

Step 1404: The BNG/BRAS initiates an L2TP tunnel establishment with the X-MAG.

Step 1405: The BNG/BRAS sends the user's authentication parameter to the X-MAG to initiate 3GPP access authentication. The X-MAG interacts with the 3GPP HSS/AAA to perform access authentication for the user accessing the mobile network. Here, the access authentication for the user is completed by using the 3GPP-based authentication mode, and the 3GPP-based authentication mode may be EAP-AKA.

When the access authentication of the fixed network is not started in step 1402, this step is not performed, and step 1406 is performed.

When the authentication mode negotiated by the BNG/BRAS with the UE in step 1401 is different from the authentication mode supported by the mobile network, the execution of this step fails, and step 1406 is performed.

Step 1406: When the authentication mode negotiated by the BNG/BRAS with the UE in step 1401 is different from the authentication mode supported by the mobile network, or when the access authentication of the fixed network in step 1402 is not started or completed, the X-MAG triggers. Re-initiate LCP negotiation with the UE.

Step 1407: The terminal performs access authentication of the user accessing the mobile network through interaction between the X-MAG and the 3GPP HSS/AAA. Here, the access authentication for the user is completed by using the 3GPP-based authentication mode, and the 3GPP-based authentication mode may be EAP-AKA.

Step 1408: The UE sends a PPP NCP configuration request to the X-MAG, and performs PPP NCP negotiation with the X-MAG. When the message passes through the BNG/BRAS, the BNG/BRAS matches the message to the L2TP tunnel established for the UE in step 1404, and encapsulates the PPP message in the L2TP tunnel and forwards it to the X-MAGo.

Here, the configuration request carries at least parameters such as a mobile network ID and an access point name (APN) of the UE; the PPP NCP configuration request sent by the UE to the X-MAG may carry or not carry the IP acquired by the UE on the fixed network. Address IP1. Step 1409: After receiving the L2TP message from the BNG/BRAS, the X-MAG removes the L2TP encapsulation and obtains the PPP NCP configuration request sent by the UE. As the PMG of the PMIPv6, the X-MAG sends a PBU message to the P-GW to request tunnel binding with the P-GW. After the subsequent establishment of the PMIPv6 tunnel is complete, the X-MAG needs to establish and store the corresponding relationship between the L2TP tunnel, the PPP session, and the PMIPv6 tunnel.

Step 1410: After receiving the PBU message, the P-GW creates a Binding Cache Entry (BCE) and allocates an IP address IP2 assigned by the 3GPP core network to the UE.

Here, how the P-GW establishes an IP-CAN session with the PCRF is a prior art; wherein, the PCRF distinguishes the v/hPCRF in the roaming scenario, and the vPCRF does not exist in the non-roaming scenario.

Step 1411: The P-GW sends an APN/P-GW identity pair to the 3GPP HSS/AAA through Diameter signaling, and stores the identifier of the P-GW.

Step 1412: The P-GW responds to the X-MAG with a PBA message, and carries the IP address IP2 allocated by the 3GPP core network to the UE in the PBA message.

Step 1413: The X-MAG completes the PPP NCP negotiation with the UE, and sends the IP address IP2 assigned to the UE to the UE through the PPP NCP configuration response. The X-MAG encapsulates the PPP NCP configuration response message in the L2TP tunnel and sends it to the BNG/BRAS. The BNG/BRAS removes the L2TP tunnel encapsulation, extracts the PPP message, and forwards it to the UE.

Step 1414: Based on the trigger of the operation of step 1410, the PCRF initiates a policy session establishment request to the BPCF to establish a policy session.

Here, the established policy session is similar to the gateway control session defined in 3GPP. Through this session, the BPCF obtains the relevant QoS and charging policies from the policy unified control point PCRF;

In the roaming scenario, the vPCRF is passed between the BPCF and the hPCRF; in the non-roaming scenario, the vPCRF does not exist.

Step 1415: When the step 1403 is not performed, the establishment of the fixed network policy session is started. Step 1416: Complete the transmission of the data service. For the uplink data packet, the UE encapsulates the uplink data with the IP address assigned by the 3GPP core network as the inner source IP address and the communication peer IP address as the destination IP address, and then performs PPP encapsulation, and then forwards the packet to the BNG/BRAS. The BNG/BRAS forwards the received uplink data packet to the X-MAG after L2TP encapsulation; the X-MAG intercepts the received uplink data packet from the UE, decapsulates the L2TP and PPP encapsulation, and retains the inner layer source IP address and destination IP address. The address is then encapsulated into a ΡΜΙΡνό tunnel and sent to the P-GW;

For downlink data packets, X-MAG decapsulates the downlink data, stores the inner source IP address and destination IP address, and then passes through the PPP and L2TP two-layer encapsulation and forwards it to BNG/BRAS; BNG/BRAS receives After the downlink data packet, after the L2TP encapsulation, the data packet is forwarded to the UE; the UE receives the downlink data from the X-MAG, decapsulates the PPP encapsulation, strips the inner layer IP address, and obtains the payload. Example 8

15 is a schematic flowchart of implementing offline/de-attachment of a UE in a network architecture of a mobile network in a fixed network in a bridging mode according to Embodiment 8 of the present invention, where the network architecture may be as shown in any of FIG. 8 to FIG. . Specifically, the UE offline/de-attaching process from the mobile network includes the following steps:

Step 1501: The UE accesses the EPS core network through a fixed network, and establishes at least one PDN connection.

Step 1502: The UE sends a PPP session termination request to the X-MAG to request offline/de-attach/delete the PDN connection. When the message passes through the BNG/BRAS, the BNG/BRAS matches the message to the L2TP tunnel established for the UE, and encapsulates the PPP message in the L2TP tunnel and forwards it to the X-MAG.

Here, the PPP session is an LCP or an NCP. Correspondingly, the PPP session termination request is a PPP LCP termination request or a PPP NCP termination request. Generally, the UE may initiate offline/de-attach, or delete some for some reason. The operation of the PDN connection.

Step 1503: After receiving the L2TP message from the BNG/BRAS, the X-MAG removes the L2TP. Encapsulation, obtaining a PPP session termination request sent by the UE. As the PMG of the PMIPv6, the X-MAG sends a PBU message to the P-GW, and carries a lifetime zero indication, requesting to cancel the tunnel binding with the P-GW;

Here, if a separate PDN connection is deleted, only the PMIPv6 tunnel of the PDN connection to be released may be released; if it is offline/de-attach, each PMIPv6 tunnel is to be removed separately; correspondingly, after receiving the PBU message, the P-GW receives the PBU message. , will delete the tunnel binding context with X-MAG.

Step 1504: The P-GW tears down the IP-CAN session with the PCRF.

Step 1505: The P-GW sends an APN/P-GW identity pair to the 3GPP HSS/AAA through Diameter signaling, and notifies the 3GPP HSS/AAA to delete the identifier of the P-GW.

Step 1506: The P-GW responds to the X-MAG with a PBA message.

Step 1507: The X-MAG returns a PPP termination response to the UE, and notifies the UE that the offline/de-attach/PDN connection deletion is completed. The X-MAG encapsulates the PPP termination response message in the L2TP tunnel and sends it to the BNG/BRAS. The BNG/BRAS removes the L2TP tunnel encapsulation, extracts the PPP message, and forwards it to the

UE.

Here, the PPP termination response may be a PPP LCP termination response, or a PPP NCP termination response; the notification UE offline/de-attach/PDN connection deletion includes: notifying the UE that the PPP session is removed and the PDN connection is deleted.

Step 1508: The X-MAG and the BNG/BRAS complete the release of the L2TP tunnel.

Step 1509: If the detach/offline operation is performed, the fixed network needs to complete the local connection release and the local resource release; if only one PDN connection is deleted, only the corresponding resource is released, and the other

Resources for PDN connections continue to be retained. Example 9

16 is a schematic diagram of an implementation process of a UE switching from a 3GPP IP access network to a fixed network in a network architecture of a UE connected to a mobile network through a fixed network in a bridge mode according to Embodiment 9 of the present invention; The network architecture based on this can be as shown in any of Figures 8-13. The handover process refers to that after the UE has accessed/attached to the EPS core network through the fixed network, it needs to switch to the fixed network for some reasons. Specifically, the process for the UE to switch from the 3GPP access network to the fixed network includes the following steps:

Step 1601: The UE completes the trusted 3GPP access through the fixed network.

Step 1602: The UE decides to switch to the fixed network for some reason;

Here, the reason may be that the 3GPP radio access signal is deteriorated or the like.

Step 1603: Same steps 1401-1415.

Step 1604: The P-GW initiates a 3GPP access network resource deactivation process.

Here, since the UE has switched to the fixed network access, the related resources of the 3GPP access network are deactivated or deleted, and this step is a prior art. Example 10

FIG. 17 is a schematic flowchart of an implementation process for establishing an additional PDN connection establishment in a network architecture of a fixed network accessing a mobile network in a bridge mode according to the embodiment of the present invention. The network architecture based on the network architecture may be as shown in any one of FIG. 8 to FIG. . In the EPS, the UE can access multiple PDNs at the same time, establish multiple PDN connections, and obtain multiple/pair IPv4/IPv6 addresses. This process describes the operation of establishing an additional PDN connection after the UE is attached. Specifically, the process of establishing an additional PDN connection by the present invention includes the following steps:

Step 1701: The UE has been connected/attached to the EPS core network by the fixed network, and the specific access/attachment process is as shown in FIG. 14.

Step 1702: When the UE needs to attach a PDN connection, the UE sends a PPP NCP configuration request to the X-MAG, and performs PPP NCP negotiation with the X-MAG. When the message passes through the BNG/BRAS, the BNG/BRAS matches the message to the L2TP tunnel established for the UE, and encapsulates the PPP message in the L2TP tunnel and forwards it to the X-MAG.

Here, the configuration request carries at least parameters of a mobile network ID, an APN, and the like of the UE; The PPP NCP configuration request sent to the X-MAG may carry or not carry the IP address IP1 acquired by the UE on the fixed network.

Step 1703: After receiving the L2TP message from the BNG/BRAS, the X-MAG removes the L2TP encapsulation and obtains the PPP NCP configuration request sent by the UE. As the PMG of the PMIPv6, the X-MAG sends a PBU message to the P-GW to request tunnel binding with the P-GW. After the establishment of the subsequent PMIPv6 tunnel, the X-MAG needs to establish and store the corresponding relationship between the L2TP tunnel, the PPP session, and the PMIPv6 tunnel.

Step 1704: After receiving the PBU message, the P-GW creates a BCE, and allocates an IP address IP2 allocated by the 3GPP core network to the UE.

Step 1705: The P-GW sends an APN/P-GW identity pair to the 3GPP HSS/AAA through Diameter signaling, and stores the identifier of the P-GW.

Step 1706: The P-GW responds to the X-MAG with a PBA message, and carries the IP address IP2 allocated by the 3GPP core network to the UE in the PBA message.

Step 1707: The X-MAG completes the PPP NCP negotiation with the UE, and sends the IP address IP2 assigned to the UE to the UE through the PPP NCP configuration response. The X-MAG encapsulates the PPP NCP configuration response message in the L2TP tunnel and sends it to the BNG/BRAS. The BNG/BRAS removes the L2TP tunnel encapsulation, extracts the PPP message, and forwards it to the UE.

Step 1708: If the PCC policy in the PCRF is changed, the PCRF sends the updated PCC policy to the BPCF through the policy session between the established BPCF and the PCRF, and the BPCF also updates the policy to the BNG/BRAS according to the actual situation, BNG. /BRAS performs the appropriate actions based on the updated policy. Example 11

18 is a schematic diagram of a UE accessing a mobile network through a fixed network in a routing mode according to Embodiment 11 of the present invention; The schematic diagram of the implementation process of UE access/attachment under the network architecture is shown in Figure 3 and Figure 4. Specifically, the UE access/attach procedure of the present invention includes the following steps:

Step 1801: The RG passes the access authentication according to the existing fixed network authentication mode. The RG establishes a local connection with the fixed network and obtains the local IP address assigned to it by the fixed network. The UE accesses the RG, and the RG allocates the private network address IP1.

Step 1802: Upon receiving the triggering of the local connection establishment step and/or the authentication step, the BNG/BRAS initiates a fixed network policy session establishment request to the BPCF, and the BNG/BRAS establishes a session for applying/delivering a dynamic policy with the BPCF, so as to Assignment and user acceptance enable accurate control.

Step 1803: The UE initiates an L2TP tunnel establishment to the X-MAG through the Y interface, and establishes a tunnel between the UE and the X-MAG.

Step 1804: The UE sends a PPP LCP configuration request to the X-MAG through the Y interface, and performs PPP LCP negotiation with the X-MAG. The UE matches the message to the L2TP tunnel established for the UE in step 1803, and the PPP signaling is encapsulated in the L2TP signaling and sent to the X-MAG. After receiving the L2TP message from the BNG/BRAS, the X-MAG removes the L2TP encapsulation, obtains the PPP message sent by the UE, and performs corresponding operations according to the PPP information.

Step 1805: The terminal performs access authentication of the user accessing the mobile network through interaction between the X-MAG and the 3GPP HSS/AAA. Here, the access authentication for the user is completed by using the 3GPP-based authentication mode, and the 3GPP-based authentication mode may be EAP-AKA. The UE encapsulates the PPP signaling in the L2TP signaling and sends it to the X-MAGo. The X-MAG receives the L2TP message from the BNG/BRAS, removes the L2TP encapsulation, obtains the PPP message sent by the UE, and performs corresponding operations according to the PPP information.

Step 1806: The UE sends a PPP NCP configuration request to the X-MAG, and performs PPP NCP negotiation with the X-MAG. The UE encapsulates the PPP message in the L2TP tunnel and forwards it to the X-MAG.

Here, the configuration request carries at least a mobile network ID and an access point name (APN) of the UE. The PPP NCP configuration request sent by the UE to the X-MAG may or may not carry the IP address IP1 acquired by the UE on the fixed network.

Step 1807: After receiving the L2TP message from the UE, the X-MAG removes the L2TP encapsulation and obtains the PPP NCP configuration request sent by the UE. As the PMG of the PMIPv6, the X-MAG sends a PBU message to the P-GW to request tunnel binding with the P-GW. After the subsequent establishment of the PMIPv6 tunnel is complete, the X-MAG needs to establish and store the correspondence between the L2TP tunnel, the PPP session, and the PMIPv6 tunnel.

Step 1808: After receiving the PBU message, the P-GW creates a Binding Cache Entry (BCE) and allocates an IP address IP2 allocated by the 3GPP core network to the UE.

Step 1809: The P-GW sends an APN/P-GW identity pair to the 3GPP HSS/AAA through Diameter signaling, and stores the identifier of the P-GW.

Step 1810: The P-GW responds to the X-MAG with a PBA message, and carries the IP address IP2 allocated by the 3GPP core network to the UE in the PBA message.

Step 1811: The X-MAG completes the PPP NCP negotiation with the UE, and sends the IP address IP2 assigned to the UE to the UE through the PPP NCP configuration response. The X-MAG encapsulates the PPP NCP configuration response message in the L2TP tunnel and sends it to the UE. After receiving the L2TP message from the X-MAG, the UE removes the L2TP encapsulation, obtains the PPP message, and performs corresponding processing according to the content of the message.

Step 1812: Based on the trigger of the operation of step 1808, the PCRF initiates a policy session establishment request to the BPCF to establish a policy session.

In the roaming scenario, the VCCF and the hPCRF pass the vPCRF; the non-roaming field Under the scene, there is no vPCRF.

Step 1813: Complete the transmission of the data service.

For the uplink data packet, the UE encapsulates the uplink data with the IP address assigned by the 3GPP core network as the inner source IP address and the communication peer IP address as the destination IP address, and then performs PPP and L2TP encapsulation, and then forwards it to X- The MAG; the X-MAG receives the uplink data packet from the UE, decapsulates the L2TP and PPP encapsulation, and reserves the inner source IP address and the destination IP address, and then encapsulates it into the PMIPv6 tunnel and sends it to the P-GW;

For the downlink data packet, the X-MAG encapsulates the downlink data into the PMIPv6 encapsulation, retains the inner source IP address and the destination IP address, and then forwards the PPP and L2TP encapsulation to the UE. The UE receives the X from the X. - The downstream data of the MAG, the L2TP and PPP encapsulation are removed, the inner IP address is stripped, and the payload is obtained. Example 12

FIG. 19 is a schematic diagram of an implementation process of UE offline/de-attachment in a network architecture of a fixed network accessing a mobile network by a UE in a routing mode according to Embodiment 12 of the present invention. The network architecture based on FIG. 3 and FIG. 4 is shown in FIG. Specifically, the offline/de-attachment process of the UE from the mobile network includes the following steps:

Step 1901: The UE accesses the EPS core network through a fixed network, and establishes at least one PDN connection.

Step 1902: The UE sends a PPP session termination request to the X-MAG to request offline/de-attach/delete the PDN connection. The UE matches the message to the L2TP tunnel established for the UE, and encapsulates the PPP message in the L2TP tunnel and sends it to the X-MAG.

Step 1903: After receiving the L2TP message from the UE, the X-MAG removes the L2TP encapsulation. Get the PPP session termination request sent by the UE. As the PMG of the PMIPv6, the X-MAG sends a PBU message to the P-GW and carries a lifetime zero indication. The request is de-tuned to the P-GW. Here, if the PDN connection is deleted, the X-MAG can be released only. The PMIPv6 tunnel connected to the PDN; if it is offline/de-attached, each PMIPv6 tunnel is removed. Correspondingly, after receiving the PBU message, the P-GW deletes the tunnel binding context with the X-MAG.

Step 1904: The P-GW tears down the IP-CAN session with the PCRF.

Step 1905: The P-GW sends an APN/P-GW identity pair to the 3GPP HSS/AAA through Diameter signaling, and notifies the 3GPP HSS/AAA to delete the identifier of the P-GW.

Step 1906: The P-GW responds to the X-MAG with a PBA message.

Step 1907: The X-MAG returns a PPP termination response to the UE, and notifies the UE that the offline/de-attach/PDN connection deletion is completed. The X-MAG encapsulates the PPP termination response message in the L2TP tunnel and sends it to the UE. After receiving the L2TP message from the X-MAG, the UE removes the L2TP encapsulation, obtains the PPP message, and performs corresponding processing according to the content of the message.

Step 1908: The release of the L2TP tunnel is initiated between the UE and the X-MAG.

Step 1909: If the detach/offline operation is performed, the fixed network needs to complete the local connection release and the local resource release. If only one PDN connection is deleted, only the corresponding resource is released, and the resources of other PDN connections are retained. Example 13

FIG. 20 is a schematic flowchart of a process for a UE to switch from a 3GPP IP access network to a fixed network in a network architecture of a fixed network accessing a mobile network in a routing mode according to Embodiment 13 of the present invention, where the network architecture is based on FIG. 3 and FIG. 4 is shown. The handover process means that the UE has passed the fixed network. After accessing/attaching to the EPS core network, it is necessary to switch to the fixed network for some reason. Specifically, the process for the UE to switch from the 3GPP access network to the fixed network includes the following steps:

Step 2001: The UE completes the trusted 3GPP access through the fixed network.

Step 2002: The UE decides to switch to the fixed network for some reason.

Step 2003: Same as steps 1801-1812.

Step 2004: The P-GW initiates a 3GPP access network resource deactivation process.

Here, since the UE has switched to the fixed network access, the related resources of the 3GPP access network are deactivated or deleted, and this step is a prior art. Example 14

FIG. 21 is a schematic diagram showing an implementation process of establishing an additional PDN connection establishment by a UE in a network mode of a fixed network accessing a mobile network in a routing mode according to Embodiment 14 of the present invention, and the network architecture based on FIG. 3 and FIG. In the EPS, the UE can access multiple PDNs at the same time, establish multiple PDN connections, and obtain multiple/pair IPv4/IPv6 addresses. This procedure describes the operation of establishing an additional PDN connection after the UE is attached. Specifically, the process of establishing an additional PDN connection by the present invention includes the following steps:

Step 2101: The UE has been connected/attached to the EPS core network by the fixed network, and the specific access/attachment process is as shown in FIG. 18.

Step 2102: When the UE needs to attach a PDN connection, the UE sends a PPP NCP configuration request to the X-MAG, and performs PPP NCP negotiation with the X-MAG. The UE matches the message to the L2TP tunnel established for the UE, and the PPP signaling is encapsulated in the L2TP signaling and sent to the X-MAG.

Here, the configuration request carries at least a parameter of the mobile network ID and the APN of the UE. The PPP NCP configuration request sent by the UE to the X-MAG may carry or not carry the IP address IP1 acquired by the UE on the fixed network.

Step 2103: After receiving the L2TP message from the BNG/BRAS, the X-MAG removes the L2TP. Encapsulation, obtaining a PPP NCP configuration request sent by the UE. As the PMG of the PMIPv6, the X-MAG sends a PBU message to the P-GW to request tunnel binding with the P-GW. After the subsequent establishment of the PMIPv6 tunnel is complete, the X-MAG needs to establish and store the corresponding relationship between the L2TP tunnel, the PPP session, and the PMIPv6 tunnel.

Step 2104: After receiving the PBU message, the P-GW creates a BCE, and allocates an IP address IP2 allocated by the 3GPP core network to the UE.

Step 2105: The P-GW sends an APN/P-GW identity pair to the 3GPP HSS/AAA through Diameter signaling, and stores the identifier of the P-GW.

Step 2106: The P-GW responds to the X-MAG with a PBA message, and carries the IP address IP2 allocated by the 3GPP core network to the UE in the PBA message.

Step 2107: The X-MAG completes the PPP NCP negotiation with the UE, and sends the IP address IP2 assigned to the UE to the UE through the PPP NCP configuration response. The X-MAG encapsulates the PPP NCP configuration response message in the L2TP tunnel and sends it to the UE. After receiving the L2TP message from the X-MAG, the UE removes the L2TP encapsulation, obtains the PPP message, and performs corresponding processing according to the content of the message.

Step 2108: If the PCC policy in the PCRF is changed, the PCRF sends the updated PCC policy to the BPCF through the policy session between the established BPCF and the PCRF, and the BPCF also updates the policy to the BNG/BRAS according to the actual situation, BNG. /BRAS performs the appropriate actions based on the updated policy.

It should be noted that FIG. 7 is a better solution for the fixed network of the routing mode. In addition, there are other solutions. For example, FIG. 22, FIG. 23a, FIG. 23b, and FIG. 24 provide other solutions. .

As shown in Figure 22, the basic idea is to support the use of the GTP protocol on the terminal and X-MAG. To implement control signaling interaction between the UE and the X-MAG and packet routing of data. In this method, the control plane protocol stack settings of the X-MAG, the UE, and related network elements are as shown in FIG. 22. Specifically, as shown in FIG. 22, the X-MAG control plane protocol stack includes at least an L1/L2 (Layer 1 / Layer 2) layer and an IP layer, and an L1/L2 layer is an underlying bearer layer; On one side of the P-GW, the UDP layer and the PMIPv6 layer are carried on the IP layer. That is, the X-MAG and the P-GW interact with each other over the IP layer; Above the IP layer are the UDP layer and the GTP layer. Correspondingly, in the protocol stack of the UE side, a UDP layer and a GTP layer are set on the IP layer to implement PPP control signaling interaction between the UE and the X-MAG.

For control plane transmission, the UE sends GTP-C signaling to the X-MAG. After receiving the GTP signaling from the UE, the X-MAG operates according to its content (eg, authentication, establishing PMIPv6 binding, etc.). When the X-MAG needs to send control plane signaling (for example, when the authentication process, the PMIPv6 binding process, and the like need to perform signaling interaction with the UE), the X-MAG sends GTP-C signaling to the UE; After the GTP signaling from the X-MAG, the corresponding operation is performed according to the received GTP signaling.

For the user plane transmission, on the UE side, the uplink data packet is encapsulated in the IP layer by the IP address allocated by the 3GPP core network, and then encapsulated by the GTP layer and sent to the X-MAG; the X-MAG solves the uplink data packet from the UE. The encapsulation process, the GTP encapsulation is removed, the inner IP address is reserved, and then encapsulated into the tunnel and sent to the P-GW. For the downlink data of the tunnel from the P-GW, the X-MAG de-encapsulates the tunnel, retains the inner IP address, and then sends the packet to the UE after being encapsulated in the GTP layer. After receiving the downlink data from the X-MAG, the UE receives the downlink data from the X-MAG. The decapsulation process is performed, and the GTP encapsulation is removed, and then sent to the IP layer of the UE side for subsequent processing.

As shown in Figure 23a, the basic idea is to support the use of Diameter and EAP protocols on the terminal and X-MAG to implement control signaling interaction between the UE and the X-MAG. In this method, the control plane protocol stack settings of the X-MAG, the UE, and its associated network elements are as shown in Figure 23a. specific:

As shown in Figure 23a, the control plane protocol stack of the X-MAG includes at least the L1/L2 (Layer 1 / Layer 2) layer and the IP layer, and the L1/L2 layer is the underlying bearer layer. On the IP layer, the P-GW is connected. One side, Hosted on the IP layer is the UDP layer and the PMIPv6 layer. That is, the X-MAG and the P-GW interact with each other over the IP layer. The side that connects to the UE is carried on the IP layer. UDP layer, Diameter layer, EAP layer. Correspondingly, in the protocol stack of the UE side, a UDP layer, a Diameter layer, and an EAP layer are set on the IP layer to implement PPP control signaling interaction between the UE and the X-MAG.

For control plane transmission, the access authentication of the UE is completed by the EAP protocol, and for other control plane signaling, the Diameter protocol is used.

In this method, the user plane protocol stack settings of the X-MAG, the UE, and related network elements are as shown in Figure 23b. In this scenario, a GRE tunnel is established between the UE and the X-MAG for data packet transmission.

For the user plane transmission, on the UE side, the uplink data packet encapsulates the IP address allocated by the 3GPP core network in the IP layer, and is encapsulated by the GRE layer, and then sent to the X-MAG; the X-MAG solves the uplink data packet from the UE. The encapsulation process, the GRE encapsulation is removed, the inner IP address is reserved, and then encapsulated into the tunnel and sent to the P-GW. For the downlink data of the tunnel from the P-GW, the X-MAG de-encapsulates the tunnel, retains the inner IP address, and then sends the packet to the UE after being encapsulated in the GRE layer. After receiving the downlink data from the X-MAG, the UE receives the downlink data from the X-MAG. The decapsulation process is performed, and the GRE encapsulation is removed, and then sent to the IP layer of the UE side for subsequent processing.

As shown in FIG. 24, the basic idea is to support the use of the SIP protocol on the terminal and the X-MAG to implement control signaling interaction between the UE and the X-MAG and packet routing of data. The control plane protocol stack setting of the X-MAG, the UE and its related network elements in the method is as shown in FIG. 24 . Specifically, as shown in FIG. 22, the X-MAG control plane protocol stack includes at least an L1/L2 (Layer 1 / Layer 2) layer and an IP layer, and an L1/L2 layer is an underlying bearer layer; On one side of the P-GW, the UDP layer and the PMIPv6 layer are carried on the IP layer. That is, the X-MAG and the P-GW interact with each other over the IP layer; Above the IP layer are the UDP layer and the SIP layer. Correspondingly, in the protocol stack on the UE side, UDP is set on the IP layer. The layer and the SIP layer are used to implement control signaling interaction between the UE and the X-MAG.

For control plane transmission, SIP is used between the UE and the X-MAG to complete related procedures such as authentication and access.

All the methods in the present invention are described by using PMIPv6 between X-MAG and P-GW as an example. A GTP tunnel can also be used between X-MAG and P-GW. In this case, the process is similar to that of using ΡΜΙΡνό. Just use GTP messages to implement the corresponding functions.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

Claim

A system for merging a fixed network and a mobile network, wherein the system comprises: a fixed network, a mobile network, a mobile anchor gateway X-MAG, and a UE;

The X-MAG is connected between the broadband network gateway/broadband remote access server BNG/BRAS of the fixed network and the packet data network gateway P-GW of the mobile network, and is configured to process control signaling of the UE accessing the mobile network, and The data is sent or received by the UE via the mobile network; a Ya interface is set between the UE and the BNG/BRAS, and a Yb interface is set between the BNG/BRAS and the X-MAG.

2. The system according to claim 1, wherein

3. The system according to claim 1, wherein the control signaling of the X-MAG processing UE accessing the mobile network is:

When the UE needs to send control plane signaling, the UE sends control plane signaling to the BNG/BRAS; after receiving the control plane signaling from the UE, the BNG/BRAS creates or searches for a correct tunnel for the user, and is responsible for The control plane signaling is encapsulated in the tunnel and forwarded to the X-MAG. After receiving the signaling from the BNG/BRAS, the X-MAG takes out the control plane signaling from the UE in the signaling, and performs corresponding Operation When the X-MAG needs to send control plane signaling, the X-MAG encapsulates the control plane signaling in the tunnel and sends it to the BNG/BRAS through the correct tunnel; the BNG/BRAS receives the letter from the X-MAG After the command, the control plane signaling is taken out and forwarded to the UE; the UE performs corresponding operations according to the received control plane signaling.

4. The system according to claim 1, wherein the user plane protocol stack of the X-MAG includes at least an L1/L2 layer and an IP layer, and an L1/L2 layer is an underlying bearer layer; and above the IP layer, a connection P On the side of the GW, the UDP layer and the PMIPv6 layer are carried on the IP layer; the NB layer and the Yb user plane protocol layer are carried on the side of the BNG/BRAS connected to the IP layer; In the user plane protocol stack on the Yb interface of the BNG/BRAS, the UDP layer and the Yb user plane protocol layer are set on the IP layer; the user plane protocol stack of the Ya interface of the UE is carried on the Ethernet/802.11 series protocol layer. In the Ya user plane protocol layer, the Ya user plane protocol layer carries an IP layer; correspondingly, the user plane protocol stack on the Ya interface of the BNG/BRAS directly carries the Ya user plane protocol on the Ethernet layer; The control plane protocol stack of the P-GW further carries an IP layer on the uppermost layer of the user plane protocol stack on the side of the X-MAG connection P-GW.

5. The system according to claim 1, wherein the data sent or received by the X-MAG routing UE via the mobile network is:

When the UE needs to send the user plane data, the uplink data packet encapsulates the IP address allocated by the 3GPP core network in the IP layer, and then is encapsulated by the Ya interface user plane protocol layer, and then forwarded to the BNG/BRAS; the YB interface user is performed by the BNG/BRAS. The surface protocol is encapsulated and transmitted to the X-MAG; the X-MAG decapsulates the uplink data packet, and decapsulates the Yb interface user plane protocol encapsulation and the Ya interface user plane protocol encapsulation, retains the inner layer IP address, and then encapsulates Passed into the tunnel and sent to the P-GW;

When the X-MAG needs to send user plane data, that is, downlink data received from the tunnel of the P-GW, for the downlink data, the X-MAG de-decapsulates the tunnel, retains the inner IP address, and then passes the Yb interface user plane protocol. The encapsulation and the Ya interface user plane protocol are encapsulated and transmitted to the BNG/BRAS; After the BNG/BRAS is decapsulated by the Yb interface user plane protocol, the data packet is forwarded to the UE; after receiving the downlink data, the UE performs decapsulation processing, unpacks the Ya interface user plane protocol, and then delivers the data. The UE layer on the UE side performs subsequent processing.

The system according to any one of claims 1 to 5, wherein the fixed network is a fixed network in a bridge mode.

A method for merging a fixed network and a mobile network, wherein the method comprises: X-MAG processing control signaling of a UE accessing a mobile network, and routing data sent or received by the UE via the mobile network, where the X- The MAG is connected between the BNG/BRAS of the fixed network and the P-GW of the mobile network, and the Ya interface is set between the UE and the BNG/BRAS, and the Yb interface is set between the BNG/BRAS and the X-MAG.

8. The method according to claim 7, wherein the control plane protocol stack of the X-MAG includes at least an L1/L2 layer and an IP layer, and an L1/L2 layer is an underlying bearer layer; and above the IP layer, a connection P On the side of the GW, the UDP layer and the PMIPv6 layer are carried on the IP layer; the NB layer and the Yb control plane protocol layer are carried on the side of the BNG/BRAS connected to the IP layer; In the control plane protocol stack on the Yb interface of the BNG/BRAS, the UDP layer and the Yb control plane protocol layer are set on the IP layer; the control plane protocol stack of the Ya interface of the UE is on the Ethernet/802.11 series protocol layer. Directly carrying the Ya control plane protocol; correspondingly, the control plane protocol stack on the Ya interface of the BNG/BRAS directly carries the Ya control plane protocol on the Ethernet layer; the control plane protocol stack of the P-GW The control plane protocol stack on the side where the X-MAG is connected to the P-GW is the same.

9. The method according to claim 7, wherein the control signaling of the X-MAG processing UE accessing the mobile network is:

When the UE needs to send control plane signaling, the UE sends control plane signaling to the BNG/BRAS; after receiving the control plane signaling from the UE, the BNG/BRAS creates or searches for a correct tunnel for the user, and is responsible for The control plane signaling is encapsulated in the tunnel and forwarded to the X-MAG; the X-MAG After receiving the signaling from the BNG/BRAS, the control plane signaling from the UE in the signaling is taken out, and corresponding operations are performed;

10. The method according to claim 7, wherein the user plane protocol stack of the X-MAG includes at least an L1/L2 layer and an IP layer, and an L1/L2 layer is an underlying bearer layer; and above the IP layer, a connection P On the side of the GW, the UDP layer and the PMIPv6 layer are carried on the IP layer; the NB layer and the Yb user plane protocol layer are carried on the side of the BNG/BRAS connected to the IP layer; In the user plane protocol stack on the Yb interface of the BNG/BRAS, the UDP layer and the Yb user plane protocol layer are set on the IP layer; the user plane protocol stack of the Ya interface of the UE is carried on the Ethernet/802.11 series protocol layer. In the Ya user plane protocol layer, the Ya user plane protocol layer carries an IP layer; correspondingly, the user plane protocol stack on the Ya interface of the BNG/BRAS directly carries the Ya user plane protocol on the Ethernet layer; The user plane protocol stack of the P-GW carries the IP layer at the uppermost layer of the user plane protocol stack on the side of the X-MAG connection P-GW.

The method according to claim 7, wherein the data sent or received by the X-MAG routing UE via the mobile network is:

When the X-MAG needs to send user plane data, that is, when receiving downlink data from the tunnel of the P-GW, For the downlink data, the X-MAG is de-encapsulated, and the inner IP address is reserved, and then encapsulated by the Yb interface user plane protocol encapsulation and the Ya interface user plane protocol, and then transmitted to the BNG/BRAS; the BNG/BRAS is solved. After the Yb interface user plane protocol is encapsulated, the data packet is forwarded to the UE. After receiving the downlink data, the UE performs decapsulation processing, and then decapsulates the Ya interface user plane protocol encapsulation, and then sends the packet to the IP layer of the UE side. Follow up.

The method according to any one of claims 7 to 11, wherein the fixed network is a fixed network in a bridge mode.

13. A method of converging a fixed network and a mobile network, wherein the method comprises: X-MAG processing control signaling of a UE accessing a mobile network, and routing data sent or received by the UE via the mobile network, the X- The MAG is connected between the BNG/BRAS of the fixed network and the P-GW of the mobile network, and the UE and the X-MAG support the use of the L2TP protocol to carry PPP signaling.

14. The method according to claim 13, wherein the control plane protocol stack of the X-MAG includes at least an L1/L2 layer and an IP layer, and an L1/L2 layer is an underlying bearer layer; and above the IP layer, a connection P On the GW side, the UDP layer and the PMIPv6 layer are carried on the IP layer; the UDP layer, the L2TP layer, and the PPP layer are carried on the side connected to the UE; correspondingly, in the UE In the protocol stack, the UDP layer, the L2TP layer, and the PPP layer are set on the IP layer to implement PPP control signaling interaction between the UE and the X-MAG.

The method according to claim 13, wherein the control signaling of the X-MAG processing UE accessing the mobile network is:

When the UE needs to send the control plane signaling, the UE creates or searches for the correct L2TP tunnel, and encapsulates the PPP signaling in the L2TP signaling and sends it to the X-MAG. The X-MAG receives the L2TP from the UE. After the signaling, the PPP signaling in the signaling is taken out, and corresponding operations are performed according to the content thereof;

When the X-MAG needs to send control plane signaling, the X-MAG encapsulates the PPP signaling in the L2TP signaling and sends it to the UE through the correct L2TP tunnel; the UE receives the L2TP from the X-MAG. After signaling, PPP signaling needs to be taken out from it, and corresponding operations are performed according to the received PPP signaling.

16. The method according to claim 13, wherein the user plane protocol stack of the X-MAG includes at least an L1/L2 layer and an IP layer, and an L1/L2 layer is an underlying bearer layer; On the GW side, the UDP layer and the PMIPv6 layer are carried over the IP layer; the UA layer, the L2TP layer, and the PPP co-layer are carried on the side connected to the UE; the user plane protocol in the UE In the stack, the UDP layer, the L2TP layer, and the PPP protocol layer are set on the IP layer, and the IP layer is carried on the PPP layer; the user plane protocol stack of the P-GW is on the side of the X-MAG connected to the P-GW. The top layer of the user plane protocol stack carries the IP layer.

17. The method according to claim 13, wherein the data sent or received by the X-MAG routing UE via the mobile network is:

The method according to any one of claims 13 to 17, wherein the fixed network is a fixed network of a routing mode.