CN102316602B - A kind of system, Apparatus and method for of subscriber equipment access to mobile network - Google Patents

Abstract

The invention discloses the system of a kind of subscriber equipment (UE) access to mobile network, comprise UE, fixed network and mobile network; This system also comprises the mobile anchor point gateway X-MAG be arranged between fixed network and mobile network; Described X-MAG is provided with Y interface, and described UE is provided with Y interface, and X-MAG and UE is connected by Y interface; Described X-MAG, for the treatment of the control signal of UE access to mobile network, and route UE is through the data of mobile network's outgoing or reception; Connect UE side in the chain of command protocol stack of described X-MAG and be provided with Y Interface Controller surface layer Y-C, connect UE side in the user face protocol stack of described X-MAG and be provided with Y Interface User surface layer Y-U.The present invention also also discloses a kind of method of X-MAG and UE access to mobile network, adopt the present invention to make UE realize trusted non-3 gpp by the mode of simple possible? IP accesses.

Description

A kind of system, Apparatus and method for of subscriber equipment access to mobile network

Technical field

The present invention relates to the integration technology of fixed network and mobile network, refer to system, the Apparatus and method for of a kind of subscriber equipment (UE) access to mobile network especially.

Background technology

Third generation partner program (3GPP, 3rdGenerationPartnershipProject) grouping system (the EPS of evolution, EvolvedPacketSystem), as shown in Figure 1, by the universal mobile telecommunications system land radio access web (E-UTRAN of evolution, EvolvedUniversalTerrestrialRadioAccessNetwork), Mobility Management Entity (MME, MobilityManagementEntity), gateway (S-GW, ServingGateway), grouped data network gateway (P-GW/PDNGW, PacketDataNetworkGateway), home subscriber server (HSS, HomeSubscriberServer), 3GPP authentication and authorization charging (AAA) server, "Policy and Charging Rules Function (PCRF, PolicyandChargingRulesFunction) entity, and other support nodes composition.Wherein, MME is responsible for the chain of command related works such as mobile management, the process of Non-Access Stratum signaling, the contextual management of mobile management of user; S-GW is the accessing gateway equipment be connected with E-UTRAN, forwarding data between E-UTRAN and PDNGW, and is responsible for carrying out buffer memory to pending datas such as pagings; P-GW is then the grouping system of 3GPP evolution and the borde gateway of packet data network (PDN, PacketDataNetwork), be responsible for realizing PDN access and between EPS and PDN the function such as forwarding data.Hereinafter, by 3GPPAAA server referred to as 3GPPAAA.

In EPS, when UE is accessed by E-UTRAN, general data transfer platform (GTP, GeneralDataTransferPlatform) can be adopted between S-GW and P-GW, also can adopt proxy mobile IPv 6 (PMIPv6) agreement; Further, EPS passes through the intercommunication of S2a/b/c Interface realization and non-3 GPP network, and P-GW is as the anchor point between 3GPP and non-3 GPP network.Wherein, as shown in Figure 1, non-3 GPP system is divided into trusted non-3 gpp IP access and trustless non-3 gpp IP accesses, and trusted non-3 gpp IP access can directly by S2a and P-GW interface; Trustless non-3 gpp IP access need be connected with P-GW through the packet data gateway (ePDG, EvolvedPacketDataGateway) of evolution, and the interface between ePDG and P-GW is S2b.S2a interface supports mobile IPv 4 (MIPv4) agreement and PMIPv6 agreement; S2b interface supports PMIPv6 agreement; S2c is the interface between UE and P-GW, adopts two stack mobile IP v 6 (DSMIPv6, DualStackMobileIPv6) agreement, provides control and mobile management.

In EPS, strategy and charge execution function (PCEF, Policyandchargingenforcementfunction) are present in P-GW, and PCRF and P-GW is by Gx interface exchange message.When interface between S-GW and P-GW is based on PMIPv6, resident in S-GW have bearing binding and event reporting function (BBERF, BearerBindingandEventReportingFunction) entity, by Gxc interface exchange message between S-GW and PCRF; When UE is by the access of trusted non-3 gpp IP connecting system, also resident in trusted non-3 gpp IP IAD have BBERF, by Gxa interface exchange message between trusted non-3 gpp IP IAD and PCRF.

Fig. 2 is the structure composed schematic diagram of existing fixed network, UE is by routing gateway (RG, RoutingGateway), Access Network (AN, AccessNetwork), wideband network gateway/Broadband Remote Access Server (BNG//BRAS, BroadbandNetworkGateway/BroadbandRemoteAccessServer) is linked into external network PDN according to this.Here, described Access Network comprises the network element such as DSLAM (DSLAM, DigitalSubscriberLineAccessMultiplexer), Optical Network Terminal (ONT, OpticalNetworkTerminal); Described external network PDN can be Internet or operator's enterprise network etc.Wherein, UE is linked into Broadband Forum AAA (BBFAAA, BroadbandForumAAA) server by BNG/BRAS, completes access authentication and authentication; BNG/BRAS obtains carrying and charging control strategy from BPCF, completes the management to fixed network access-in resource and charging.Hereinafter, by BBFAAA server referred to as BBFAAA.

Each interface is described for convenience, herein using two of each interface end points network elements as the title of each interface, such as: the interface between BNG/BRAS and BBFAAA can be called (BNG/BRAS-BBFAAA) interface; Interface between BNG/BRAS and BPCF can be called (BNG/BRAS-BPCF) interface, and the rest may be inferred.

Conveniently can unified management to mobile network and fixed network, operator wishes the fusion realizing fixed network and mobile network, and like this, terminal can be linked into mobile, the fixing network merged by unified identity from different access points respectively.

According to the above-mentioned description to mobile network and fixed network, fixed network can access as the non-3 gpp IP access module of mobile network EPS, and the access way having S2a, S2b and S2c etc. different.But, when fixed network is linked into EPS as non-3 gpp IP trusty, when namely adopting S2a access way, need fixed network BNG/BRAS to support the function of the mobile anchor point gateway (MAG, MobileAnchorGateway) in PMIPv6 agreement, this just means the BNG/BRAS of fixed network of will upgrading, but each BNG/BRAS of upgrading fixed network, concerning operator arranges net, the cost paid is very large, and also little real.At present, also nobody proposes simple possible and supports the scheme of trusted non-3 gpp IP access.

Summary of the invention

In view of this, main purpose of the present invention is the system, the Apparatus and method for that provide a kind of UE access to mobile network, makes UE realize trusted non-3 gpp IP by the mode of simple possible and accesses.

For achieving the above object, technical scheme of the present invention is achieved in that

The invention provides a kind of system of UE access to mobile network, comprise UE, fixed network and mobile network; This system also comprises the mobile anchor point gateway X-MAG be arranged between fixed network and mobile network; Described X-MAG is provided with Y interface, and described UE is provided with Y interface, and X-MAG and UE is connected by Y interface;

Described X-MAG, for the treatment of the control signal of UE access to mobile network, and route UE is through the data of mobile network's outgoing or reception;

Connect UE side in the chain of command protocol stack of described X-MAG and be provided with Y Interface Controller surface layer Y-C, connect UE side in the user face protocol stack of described X-MAG and be provided with Y Interface User surface layer Y-U; Described Y-C layer, for being carried on the chain of command signaling on IP layer; Described Y-U layer, for realizing the double-deck IP encapsulation/decapsulation of packet.

Wherein, connect UE side in the chain of command protocol stack of described X-MAG and be also provided with IP layer and bottom bearing bed, be positioned under Y-C layer successively; Connect UE side in the user face protocol stack of described X-MAG and be also provided with IP layer and bottom bearing bed, be positioned at successively under Y-U layer.

In such scheme, described X-MAG is connected with the P-GW being arranged in mobile network; Connect P-GW side in the chain of command protocol stack of described X-MAG and be disposed with bottom bearing bed, IP layer, PMIPv6 layer from bottom to top; Connect P-GW side in the user face protocol stack of described X-MAG and be disposed with bottom bearing bed, IP layer, tunnel layer from bottom to top.

In such scheme, described X-MAG is acted on behalf of with 3GPPAAA server or 3GPPAAA by the BBFAAA server in fixed network and is connected; Or described X-MAG directly acts on behalf of with 3GPPAAA or 3GPPAAA and is connected.

In such scheme, described mobile network is local network; Described X-MAG is connected with the P-GW being positioned at local network by local interface; Described mobile network is divided into home network and visited network; Described X-MAG is connected with the P-GW being positioned at home network by roaming interface; Or described X-MAG is connected with the P-GW being positioned at visited network by local interface.

Present invention also offers a kind of X-MAG, this X-MAG is provided with Y interface, and in the chain of command protocol stack of X-MAG, connects UE side be provided with Y-C layer, connects UE side and be provided with Y-U layer in the user face protocol stack of X-MAG; Described Y-C layer, for being carried on the chain of command signaling on IP layer; Described Y-U layer, for realizing the double-deck IP encapsulation/decapsulation of packet.

Invention further provides a kind of method of UE access to mobile network, the X-MAG be connected between fixed network and mobile network is set, and Y interface is set for X-MAG and UE;

In the chain of command protocol stack of described X-MAG, connect UE side Y-C layer is set, in the user face protocol stack of described X-MAG, connect UE side Y-U layer is set; And Y-C layer and Y-U layer are set respectively in the chain of command protocol stack and user face protocol stack of UE;

When UE is via mobile network's outgoing data, UE sends the data to X-MAG, is sent to mobile network side via X-MAG; Or UE is received by X-MAG and forwards by mobile network side the data of coming;

When UE and mobile network's interactive control information, the control signal carrying control information is sent to X-MAG by UE, triggers the associative operation in X-MAG initiation mobile network; Or, after the X-MAG signaling received from mobile network side network element or own event triggers, send Downlink Control Information to UE.

In such scheme, described UE sends the data to X-MAG, being sent to mobile network side via X-MAG is: UE first encapsulates as object IP address as internal layer source IP address, Correspondent Node IP address with the IP address that 3GPP core net is distributed upstream data, again with fixed network be the IP address distributed of UE as outer source IP address, carry out encapsulation location as outer object IP address X-MAG, after through Y-U layer by the transmitting uplink data after encapsulating to X-MAG; X-MAG is to the packet from UE side received, and outer source IP address and object IP address are fallen in decapsulation, retains internal layer source IP address and object IP address, is encapsulated into afterwards in PMIPv6 tunnel and sends;

UE receives by X-MAG the data come by the forwarding of mobile network side: X-MAG encapsulates downlink data solution PMIPv6, retain internal layer source IP address and object IP address, then with fixed network be the address of the IP address distributed of UE as outer object IP address, X-MAG as after the encapsulation of outer source IP address, be transferred to UE through Y-U layer; UE, to the downlink data from X-MAG received, carries out the decapsulation process of two-layer IP address, obtains payload.

In such scheme, the control signal carrying control information is sent to X-MAG by UE, triggering the associative operation that X-MAG initiates in mobile network is: UE as behind object IP address, sends to X-MAG through Y-C layer to the address of upstream control signaling fixed network to be IP address that UE distributes be source IP address, X-MAG; After X-MAG receives the control signal of encapsulation, remove IP address encapsulation, obtain the content of control signal, and initiate follow-up associative operation according to the content of control signal;

After the X-MAG signaling received from mobile network side network element or own event triggers, sending descending control signaling to UE is: X-MAG receives and triggers from the signaling triggering of P-GW and/or 3GPPAAA of mobile network side or the signaling of own event, using control signal fixed network be the IP address distributed of UE as destination address, X-MAG address as after source address encapsulates, send to UE; UE receives rear releasing IP address encapsulation, obtains control signal content.

In such scheme, described upstream control signaling is: the PPPLCP configuring request that UE sends to X-MAG or PPPNCP configuring request or PPPLCP stops request or PPPNCP stops request; Described descending control signaling is: X-MAG replys to the PPPNCP configuration that UE sends or PPPLCP configuration is replied or PPPLCP stops response or PPPNCP termination response.

In such scheme, described UE and mobile network also comprise alternately: UE is by carrying out the access authentication of user's access to mobile network between X-MAG and 3GPPHSS/AAA.

In such scheme, when UE accesses/be attached to mobile network, described UE and mobile network's interactive control information specifically comprise:

A1.UE by certification and obtain fixed network be self distribute IP address after, via fixed network and the session of "Policy and Charging Rules Function PCRF Establishment strategy;

A2.UE sends access/attachment request to X-MAG, and to carry fixed network be the IP address that UE distributes, and it is that IP address that UE distributes to be associated with UE relation that X-MAG receives request according to fixed network;

A3. the access authentication of user's access to mobile network is carried out based on X-MAG;

A4.X-MAG is mutual as MAG and the P-GW of PMIPv6, and obtaining 3GPP core net is the IP address that UE distributes, and the IP address of acquisition is sent to UE;

A5.UE completes data transmit-receive by two the IP addresses obtained.

In such scheme, when UE is from mobile network's off-line/attachment removal, described UE and mobile network's interactive control information specifically comprise:

When b1.UE needs off-line/attachment removal or deletes PDN connection, UE sends to X-MAG the request of termination by Y interface;

B2.X-MAG and P-GW is mutual, and request and P-GW remove tunnel binding, and P-GW removes the IP-CAN session between PCRF, and notifies that 3GPPAAA deletes the mark of P-GW;

B3.X-MAG returns termination response by Y interface to UE, and notice UE off-line/attachment removal/PDN connects deletion to be completed.

In such scheme, when UE switches from 3GPP Access Network to fixed network, described UE and mobile network's interactive control information specifically comprise:

When c1.UE determines to be switched to fixed network, first obtaining fixed network is behind the IP address self distributed, and via fixed network and the session of "Policy and Charging Rules Function PCRF Establishment strategy;

C2.UE sends access/attachment request to X-MAG, and to carry fixed network be the IP address that UE distributes, and it is that IP address that UE distributes to be associated with UE relation that X-MAG receives request according to fixed network;

C3. the access authentication of user's access to mobile network is carried out based on X-MAG;

C4.X-MAG is mutual as MAG and the P-GW of PMIPv6, and obtaining 3GPP core net is the IP address that UE distributes, and the IP address of acquisition is sent to UE;

C5.P-GW initiates 3GPP access network resource deexcitation flow process.

In such scheme, when UE sets up the connection of additional packet data net, described UE and mobile network's interactive control information specifically comprise:

When d1.UE needs additional PDN to connect, send PPPNCP configuring request to X-MAG, carry out PPPNCP negotiation with X-MAG;

After d2.X-MAG receives the PPPNCP configuring request of UE transmission, obtaining fixed network is the IP address that UE distributes;

D3.X-MAG is mutual as MAG and the P-GW of PMIPv6, and request and the tunnel binding of P-GW, obtain the IP address that 3GPP core net is UE distribution;

D4.X-MAG completes PPPNCP by Y interface and UE and consults, and will send to UE by PPPNCP configuration response.

System, the Apparatus and method for of UE access to mobile network provided by the present invention, the mobile anchor point gateway X-MAG accessed for realizing trusted non-3 gpp IP is set between fixed network and mobile network, make UE realize trusted non-3 gpp IP by X-MAG via fixed network to access, and then the EPS of access to mobile network.

The present invention does not need to improve each BNG/BRAS in fixed network, make the XMG function that it supports in PMIPv6, as long as increase between fixed network and mobile network and arrange X-MAG, and make X-MAG support the MAG function of PMIPv6, UE access to mobile network can be realized; Not only make network topology simple and convenient, be easy to realize, and can operation cost be reduced for operator.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of EPS framework;

Fig. 2 is the structure composed schematic diagram of existing fixed network;

Fig. 3 is the chain of command protocol stack schematic diagram of X-MAG and related network elements thereof in the present invention;

Fig. 4 is the user face protocol stack schematic diagram of X-MAG and related network elements thereof in the present invention;

Fig. 5 is the first network architecture schematic diagram of UE access to mobile network of the present invention;

Fig. 6 is the second network architecture schematic diagram of UE access to mobile network of the present invention;

Fig. 7 is the third network architecture schematic diagram of UE access to mobile network of the present invention;

Fig. 8 is the 4th kind of network architecture schematic diagram of UE access to mobile network of the present invention;

Fig. 9 is the 5th kind of network architecture schematic diagram of UE access to mobile network of the present invention;

Figure 10 is the 6th kind of network architecture schematic diagram of UE access to mobile network of the present invention;

Figure 11 is the realization flow schematic diagram of UE access/attachment under network integration framework of the present invention;

Figure 12 is the realization flow schematic diagram of UE off-line/attachment removal under network integration framework of the present invention;

Figure 13 is the realization flow schematic diagram that under network integration framework of the present invention, UE switches from 3GPPIP Access Network to fixed network;

Figure 14 is the realization flow schematic diagram setting up additional PDN connection establishment under network integration framework of the present invention.

Embodiment

Basic thought of the present invention is: arrange the mobile anchor point gateway X-MAG accessed for realizing trusted non-3 gpp IP, be connected between fixed network and mobile network, and Y interface is set between UE and X-MAG, make UE by X-MAG via fixed network, with the EPS of trusted non-3 gpp IP access way access to mobile network.

Concrete, described X-MAG is connected between the BNG/BRAS of fixed network and the P-GW of mobile network, is provided with Y interface; And described UE strengthens the function having and support Y interface, by the intercommunication of Y interface between UE and X-MAG; Described X-MAG is for the treatment of the control signal of UE access to mobile network, and route UE is through the data of mobile network's outgoing or reception.Based on set X-MAG network element, network system of the present invention supports user's access/attachment, many PDN connection establishment, user's off-line/attachment removal and the handover operation of user between 3GPP Access Network and fixed network.

For realizing the transmission between X-MAG and UE, need the protocol stack that X-MAG is set, and improve the protocol stack of UE, make UE, X-MAG be carried on the chain of command signaling on IP layer in the support of Y interface, the double-deck IP encapsulation/decapsulation of supported data bag.When X-MAG communicates with UE, P-GW, BNG/BRAS respectively, the protocol stack of X-MAG, UE, P-GW and BNG/BRAS is arranged as shown in Figure 3 and Figure 4 respectively, wherein, Fig. 3 is that the chain of command protocol stack of X-MAG and related network elements thereof is arranged, and Fig. 4 is that the user face protocol stack of X-MAG and related network elements thereof is arranged.Concrete:

As shown in Figure 3, the chain of command protocol stack of X-MAG at least comprises L1/L2 (Layer1/Layer2) layer, IP layer, and L1/L2 layer is bottom bearing bed; On IP layer, connect the side of P-GW, being carried on IP layer is PMIPv6 layer, that is, mutual by PMIPv6 layer on IP layer between X-MAG and P-GW; Connect the side of UE, being carried on IP layer is Y-C layer, that is: the control surface layer of Y interface, for being carried on the chain of command signaling on IP layer, that is, between X-MAG and UE on IP layer by Y-C layer interactive controlling signaling.Accordingly, in the protocol stack of UE side, also increase on IP layer and be provided with Y-C layer, mutual with the control signal realized between UE and X-MAG.

For chain of command transmission, in UE side, control signal behind the IP address that IP layer encapsulation 3GPP core net is distributed, then in the IP address that Y-C layer encapsulation fixed network is distributed, is transferred to the Y-C layer of X-MAG side afterwards; Accordingly, the Y-C layer of X-MAG side, to the control signal from UE side Y-C layer received, carries out decapsulation process, removes outer IP address, retains internal layer IP address, is encapsulated into PMIPv6 tunnel afterwards and issues P-GW.Further, in X-MAG side, the decapsulation of Y-C layer, from the control signal in the PMIPv6 tunnel of P-GW, retains internal layer IP address, after the IP address encapsulation then with fixed network distribution, is transferred to the Y-C layer of UE side; Accordingly, the Y-C layer of UE side, to the control signal from X-MAG side Y-C layer received, carries out decapsulation process, removes outer IP address, is handed down to the IP layer of UE side afterwards, carries out subsequent treatment.The IP layer of UE side and X-MAG side, the process of L1/L2 layer are all identical with the process of prior art.

As shown in Figure 4, the user face protocol stack of X-MAG at least comprises L1/L2 layer, IP layer; On IP layer, connect the side of P-GW, being carried on IP layer is tunnel layer, that is, mutual by tunnel layer (Tunnel) on IP layer between X-MAG and P-GW; Connect the side of UE, being carried on IP layer is Y-U layer, that is: user's surface layer of Y interface, for realizing the double-deck IP encapsulation/decapsulation of packet, that is: the encapsulation/decapsulation of IPoverIP data; That is, on IP layer, Y-U layer interaction data is passed through between X-MAG and UE.Accordingly, in the protocol stack of UE side, also increase on IP layer and be provided with Y-U layer, to realize the data interaction between UE and X-MAG.Here, described IPoverIP data refer to as payload transmission data transmit time outside be packaged with two-layer IP address, one be 3GPP core net distribute IP address, one be fixed network distribute IP address.

For the transmission of user face, in UE side, after upstream data wraps in the IP address of IP layer encapsulation 3GPP core net distribution, then in the IP address that Y-U layer encapsulation fixed network is distributed, be transferred to the Y-U layer of X-MAG side afterwards; Accordingly, the Y-U layer of X-MAG side, to the packet from UE side Y-U layer received, carries out decapsulation process, removes outer IP address, retains internal layer IP address, is encapsulated in tunnel afterwards and issues P-GW.Further, in X-MAG side, the decapsulation of Y-U layer, from the downlink data in the tunnel of P-GW, retains internal layer IP address, after the IP address encapsulation then with fixed network distribution, is transferred to the Y-U layer of UE side; Accordingly, the Y-U layer of UE side, to the downlink data from X-MAG side Y-U layer received, carries out decapsulation process, removes outer IP address, is handed down to the IP layer of UE side afterwards, carries out subsequent treatment.The IP layer of UE side and X-MAG side, the process of L1/L2 layer are all identical with the process of prior art.

Based on the setting of UE side and X-MAG side chain of command and user face protocol stack, X-MAG supports to be connected with UE, P-GW, BNG/BRAS, and the MAG function in support PMIPv6 agreement, realize packet routing and transfer functions;

X-MAG can also receive triggering signaling/access request signaling that UE sends, and from the signaling received, obtain the IP address that fixed network is UE distribution; Or from triggering the source IP address obtained signaling/access request signaling, set up the corresponding relation between source IP address and PMIPv6 tunnel;

When X-MAG receives triggering signaling/access request signaling that UE sends, can resolve receive the parameter of carrying in signaling, lifetime zero setting (PBU) message can also be sent to P-GW, in PBU message, carry the parameter in all/part access request signaling; Accordingly, UE sends to the triggering signaling/access request signaling of X-MAG, can carry or not carry the parameter such as IP address, terminal iidentification, Access Network mark that UE obtains in fixed network; UE also receives access request response message;

X-MAG can also receive the off-line request message that UE sends, and resolves the parameter of carrying in message, also sends PBU message to P-GW, carries the parameter in all/part access request message in PBU message; Accordingly, UE sends off-line request message to X-MAG, can the parameter such as carried terminal mark, Access Network mark, and UE also receives off-line request-reply message;

X-MAG can also receive the binding that P-GW sends and remove instruction (BRI, BindingRcvocationIndication) message, and resolves the parameter of carrying in message, sends corresponding disconnect request to UE.

In addition, X-MAG can also realize P-GW selection function; X-MAG is also responsible for address and forwards and transmit in the IPv4 address of UE and IPv6 address prefix assigning process;

X-MAG can act on behalf of (Proxy) and directly be connected or be connected with 3GPPAAA/3GPPAAAProxy as agency through BBFAAA servers/proxies with 3GPPAAA/3GPPAAA, realize the access authentication of user based on 3GPP, and as authenticating party, accordingly, UE supports the access authentication of user based on 3GPP.The connection of concrete X-MAG and 3GPPAAA/3GPPAAA agency or BBFAAA servers/proxies, can adopt the protocol stack corresponding with connected network element, how protocol stack is set to prior art.

Arrange based on chain of command protocol stack Y-C layer and user face protocol stack Y-U layer, the support of Y interface is carried on chain of command signaling on IP layer; Support the encapsulation/decapsulation of IPoverIP data; Support the transmission of the signaling such as access request/response signaling, off-line request/response signaling.Wherein, described support encapsulation refers to: for uplink data messages, the IP address encapsulation data message that UE distributes by 3GPP core net, then the IP address that fixed network is distributed on outer envelope; After data arrive X-MAG, outermost layer IP address is peeled off by X-MAG, then is encapsulated in the PMIPv6 tunnel between X-MAG and P-GW, sends to P-GW; Described support decapsulation refers to: for downlink data message, after arriving X-MAG from P-GW, after X-MAG removes the PMIP tunnel head of these data, at the local ip address that data message outer envelope fixed network is distributed, and route is to UE, after UE receives this data message, peel off outermost layer and time outer field IP address successively, obtain payload.

It should be noted that: alleged X-MAG, Y interface, Y-U layer, Y-C layer herein, just give a kind of title call that the particular gateway in the present invention, interface, protocol layer propose for convenience, in practical application, any other title call can be adopted, as long as the function of correspondence is identical.

In specific implementation, X-MAG can adopt server to realize, and also can increase function recited above on existing mobile anchor point gateway basis, as: in protocol stack, increase Y-C layer, Y-U layer etc.

In actual applications, described mobile network can be EPS, and comprises roaming scence and non-roaming scene; Under non-roaming scene, described mobile network is called local network; Under roaming scence, described mobile network is divided into home network and visited network; Accordingly, X-MAG is connected with fixed network and mobile network, and the network integration framework of formation has multiple different mode, is applicable to non-roaming scene and roaming scence respectively.

Embodiment one:

The present embodiment is UE the first network architecture by the EPS of X-MAG access to mobile network, as shown in Figure 5, in the present embodiment, UE is linked into EPS core net by fixed network, wherein fixed network is as the trusted non-3 GPP access of EPS, and the network architecture shown in Fig. 5 is the network architecture of non-roaming scene.In the present embodiment, X-MAG is connected with 3GPPAAA by BBFAAA servers/proxies (Server/Proxy), realizes the access authentication of user based on 3GPPAAA.

In the present embodiment, X-MAG is arranged between the P-GW of mobile network and the BNG/BRAS of fixed network, supports the MAG function in PMIPv6 agreement, and is connected with UE by Y interface; The chain of command protocol stack of X-MAG and UE and User Agreement stack are arranged respectively as shown in Figure 3 and Figure 4, on the chain of command protocol stack of X-MAG and UE and the IP layer of User Agreement stack, be respectively arranged with Y-C layer and Y-U layer, be respectively used to the transmission realizing control signal and user data between X-MAG and UE.

In practical application, when UE is via mobile network's outgoing data, UE sends the data to X-MAG, is sent to mobile network side via X-MAG; Or UE is received by X-MAG and forwards by mobile network side the data of coming;

As UE and mobile network's interactive control information, the control signal carrying control information is sent to X-MAG by UE, triggers the associative operation in X-MAG initiation mobile network; Or, after the X-MAG signaling received from mobile network side network element or own event triggers, send Downlink Control Information to UE.

Concrete, described UE sends the data to X-MAG, being sent to mobile network side via X-MAG is: UE first encapsulates as object IP address as internal layer source IP address, Correspondent Node IP address with the IP address that 3GPP core net is distributed upstream data, again with fixed network be the IP address distributed of UE as outer source IP address, carry out encapsulation location as outer object IP address X-MAG, after through Y-U layer by the transmitting uplink data after encapsulating to X-MAG; X-MAG is to the packet from UE side received, and outer source IP address and object IP address are fallen in decapsulation, retains internal layer source IP address and object IP address, is encapsulated into afterwards in PMIPv6 tunnel and sends;

UE receives by X-MAG the data come by the forwarding of mobile network side: X-MAG encapsulates downlink data solution PMIPv6, retain internal layer source IP address and object IP address, then with fixed network be the address of the IP address distributed of UE as outer object IP address, X-MAG as after the encapsulation of outer source IP address, be transferred to UE through Y-U layer; UE, to the downlink data from X-MAG received, carries out the decapsulation process of two-layer IP address, obtains payload.

The control signal carrying control information is sent to X-MAG by UE, triggering the associative operation that X-MAG initiates in mobile network is: UE as behind object IP address, sends to X-MAG through Y-C layer to the address of upstream control signaling fixed network to be IP address that UE distributes be source IP address, X-MAG; After X-MAG receives the control signal of encapsulation, remove IP address encapsulation, obtain the content of control signal, and initiate follow-up associative operation according to the content of control signal;

After the X-MAG signaling received from mobile network side network element or own event triggers, sending descending control signaling to UE is: X-MAG receives and triggers from the signaling triggering of P-GW and/or 3GPPAAA of mobile network side or the signaling of own event, using control signal fixed network be the IP address distributed of UE as destination address, X-MAG address as after source address encapsulates, send to UE; UE receives rear releasing IP address encapsulation, obtains control signal content.

Wherein, described upstream control signaling can be: the PPPLCP configuring request that UE sends to X-MAG or PPPNCP configuring request or PPPLCP stops request or PPPNCP stops request etc.;

Described descending control signaling can be: X-MAG replys to the PPPNCP configuration that UE sends or PPPLCP configuration is replied or PPPLCP stops response or PPPNCP termination response etc.

Embodiment two:

The present embodiment is the second network architecture of UE by the EPS of X-MAG access to mobile network, as shown in Figure 6, in the present embodiment, UE is linked into EPS core net by fixed network, wherein fixed network is as the trusted non-3 GPP access of EPS, and the network architecture shown in Fig. 6 is the network architecture of non-roaming scene.

With embodiment one unlike: in the present embodiment, X-MAG is not connected with 3GPPAAA by BBFAAA servers/proxies, but is directly connected with 3GPPAAA, realizes the access authentication of user based on 3GPPAAA.

In the present embodiment, X-MAG is arranged between the P-GW of mobile network and the BNG/BRAS of fixed network, supports the MAG function in PMIPv6 agreement, and is connected with UE by Y interface; The chain of command protocol stack of X-MAG and UE and User Agreement stack are arranged respectively as shown in Figure 3 and Figure 4, on the chain of command protocol stack of X-MAG and UE and the IP layer of User Agreement stack, be respectively arranged with Y-C layer and Y-U layer, be respectively used to the transmission realizing control signal and user data between X-MAG and UE.

In practical application, when UE is via mobile network's outgoing data, UE sends the data to X-MAG, is sent to mobile network side via X-MAG; Or UE is received by X-MAG and forwards by mobile network side the data of coming;

As UE and mobile network's interactive control information, the control signal carrying control information is sent to X-MAG by UE, triggers the associative operation in X-MAG initiation mobile network; Or, after the X-MAG signaling received from mobile network side network element or own event triggers, send Downlink Control Information to UE.

Wherein, concrete between UE and X-MAG control information is mutual and data forwarding process is identical with the detailed description of embodiment one.

Embodiment three:

The present embodiment is UE the third network architecture by the EPS of X-MAG access to mobile network, and as shown in Figure 7, in the present embodiment, UE is linked into EPS core net by fixed network, and wherein fixed network is as the trusted non-3 GPP access of EPS.The network architecture shown in Fig. 7 is the network architecture of roaming scence, local route, comprise local public land mobile network (hPLMN, and Visited PLMN (vPLMN) homePublicLandMobileNetwork), BPCF is connected by vPCRF with hPCRF, vPCRF with hPCRF is connected by roaming interface S9 interface; BBFAAA servers/proxies is connected with 3GPPAAA and HSS by 3GPPAAA agency; Accordingly, in the present embodiment, X-MAG is acted on behalf of with 3GPPAAA by BBFAAA servers/proxies, 3GPPAAA is connected, and realizes the access authentication of user based on 3GPPAAA.

In the present embodiment, P-GW selects to be placed in home network, and X-MAG is connected with P-GW by roaming interface, and here, roaming interface is S2a interface.

In the present embodiment, the protocol stack of X-MAG and UE is arranged, interface function and uplink and downlink transmitting procedure etc. are all identical with the function described by embodiment one, principle.

Embodiment four:

The present embodiment is the four kind network architecture of UE by the EPS of X-MAG access to mobile network, and as shown in Figure 8, in the present embodiment, UE is linked into EPS core net by fixed network, and wherein fixed network is as the trusted non-3 GPP access of EPS.The network architecture shown in Fig. 8 is the network architecture of roaming scence, local route, comprises hPLMN and vPLMN, and P-GW selects to be placed in home network, and X-MAG is connected with P-GW by roaming interface S2a interface; BPCF is connected by vPCRF with hPCRF, vPCRF with hPCRF is connected by roaming interface S9 interface.

With embodiment three unlike: in the present embodiment, X-MAG is not acted on behalf of with 3GPPAAA by BBFAAA servers/proxies, 3GPPAAA is connected, but be directly connected with 3GPPAAA by 3GPPAAA agency, realize the access authentication of user based on 3GPPAAA, accordingly, BBFAAA servers/proxies is not connected with 3GPPAAAProxy.

In the present embodiment, the protocol stack of X-MAG and UE is arranged, interface function and uplink and downlink transmitting procedure etc. are all identical with the function described by embodiment two, principle.

Embodiment five:

The present embodiment is the five kind network architecture of UE by the EPS of X-MAG access to mobile network, and as shown in Figure 9, in the present embodiment, UE is linked into EPS core net by fixed network, and wherein fixed network is as the trusted non-3 GPP access of EPS.The network architecture shown in Fig. 9 is substantially identical with embodiment three, comprises hPLMN and vPLMN, and BPCF is connected by vPCRF with hPCRF, vPCRF with hPCRF is connected by roaming interface S9 interface; BBFAAA servers/proxies is connected by 3GPPAAAProxy and 3GPPAAA and HSS; Accordingly, in the present embodiment, X-MAG is acted on behalf of with 3GPPAAA by BBFAAA servers/proxies, 3GPPAAA is connected, and realizes the access authentication of user based on 3GPPAAA.

The present embodiment and embodiment three unlike: the P-GW in the present embodiment selects to be placed in visited network, and X-MAG is connected with P-GW by local interface.

In the present embodiment, the protocol stack of X-MAG and UE is arranged, interface function and uplink and downlink transmitting procedure etc. are all identical with the function described by embodiment one, principle.

Embodiment six:

The present embodiment is the six kind network architecture of UE by the EPS of X-MAG access to mobile network, and as shown in Figure 10, in the present embodiment, UE is linked into EPS core net by fixed network, and wherein fixed network is as the trusted non-3 GPP access of EPS.The network architecture shown in Figure 10 is substantially identical with embodiment five, comprises hPLMN and vPLMN, and P-GW selects to be placed in visited network, and X-MAG is connected with P-GW by local interface; BPCF is connected by vPCRF with hPCRF, vPCRF with hPCRF is connected by roaming interface S9 interface.

With embodiment five unlike: in the present embodiment, X-MAG is not acted on behalf of with 3GPPAAA by BBFAAA servers/proxies, 3GPPAAA is connected, but be directly connected with 3GPPAAA by 3GPPAAA agency, realize the access authentication of user based on 3GPPAAA, accordingly, BBFAAA servers/proxies is not connected with 3GPPAAAProxy.

In the present embodiment, the protocol stack of X-MAG and UE is arranged, interface function and uplink and downlink transmitting procedure etc. are all identical with the function described by embodiment two, principle.

Based on the above-mentioned various network architecture, for the scene of UE access to mobile network, different from there being different flow processs according to the operation of UE, as: the flow process that UE access/attachment flow, UE off-line/attachment removal flow process, UE switch from 3GPPIP Access Network to fixed network and the flow process etc. that the additional PDN of foundation connects.Introduce UE access/attachment flow respectively in detail below in conjunction with Figure 11 to Figure 14, flow process that UE off-line/attachment removal flow process, UE switch from from 3GPPIP Access Network to fixed network and set up the flow process that additional PDN connects, each handling process described is all applicable to roam, the various network architectures of non-roaming scene.Wherein, the BBFAAA in figure refers to BBFAAA servers/proxies.

Figure 11 is the realization flow of UE access/attachment under network integration framework of the present invention, based on the network architecture be that X-MAG is set between mobile network and fixed network, X-MAG can realize the MAG function in PMIPv6, Y interactive interfacing by arranging between X-MAG and UE, make UE access/be attached to EPS core net by fixed network, fixed network accesses as the trusted non-3 gpp IP of EPS.Concrete, UE access/attachment flow of the present invention as shown in figure 11, comprises the following steps:

Step 1101:UE passes through certification according to existing fixed network authentication mode.

Step 1102:UE and fixed network set up local connection, and obtain the local ip address IP1 that fixed network is self distribution.

Step 1103: the triggering receiving local connection establishment step and/or authentication step, BNG/BRAS initiates fixed network strategy session to BPCF and sets up request, BNG/BRAS and BPCF ask/issues the session of dynamic strategy in setting up, to realize accurately controlling to Resource Allocation in Networks and user admission.

Step 1104: the triggering operated based on step 1103, BPCF initiates strategy session to PCRF and sets up request, Establishment strategy session;

Here, the strategy session set up is similar to the gateway control session defined in 3GPP, and by this session, BPCF obtains relevant QoS and charging policy to tactful universal control point PCRF;

Wherein, under roaming scence, BPCF can arrive hPCRF through vPCRF; Under non-roaming scene, there is not vPCRF.

Step 1105a:UE sends ppp link control protocol (LCP, LinkControlProtocol) configuring request by Y interface to X-MAG, carries out PPPLCP negotiation with X-MAG;

PPPLCP configuring request in the present embodiment belongs to a kind of access/attachment request.

Step 1105b:UE is based on the access authentication carrying out user's access to mobile network between X-MAG and 3GPPHSS/AAA;

Here, adopt the authentication mode based on 3GPP to complete access authentication to user, the described authentication mode based on 3GPP can be EAP-AKA.

Step 1105c:UE sends PPPNCP configuring request to X-MAG, carries out PPPNCP negotiation with X-MAG;

Here, the parameters such as the mobile network ID of UE, APN (APN) are at least carried in described configuring request; UE sends in the PPPNCP configuring request of X-MAG, can carry or not carry the IP address ip 1 that UE obtains in fixed network.

After step 1106:X-MAG receives the PPPNCP configuring request that UE sends, parsing the fixed network of carrying in signaling is the IP address ip 1 that UE distributes, or from signaling head, obtain the IP address ip 1 that UE obtains in fixed network; After follow-up PMIPv6 tunnel has been set up, X-MAG can set up the corresponding relation of IP1 and PMIPv6 address and store.

Step 1107:X-MAG, as the MAG of PMIPv6, sends PBU message to P-GW, the tunnel binding of request and P-GW.

After step 1108:P-GW receives PBU message, create banding cache entrance (BCE, BindingCacheEntry), and distribute the IP address ip 2 of 3GPP core net distribution for UE;

Here, how P-GW sets up IP-CAN session with PCRF is prior art; Wherein, PCRF distinguishes v/hPCRF under roaming scence, there is not vPCRF under non-roaming scene.

It is right that step 1109:P-GW sends APN/P-GW mark by diameter protocol (Diameter) signaling to 3GPPHSS/AAA, stores the mark of this P-GW.

Step 1110:P-GW responds PBA message to X-MAG, and in this PBA message, carry the IP address ip 2 that 3GPP core net is UE distribution.

Step 1111:X-MAG completes PPPNCP by Y interface and UE and consults, and by PPPNCP configuration response, the IP address ip 2 distributing to UE is sent to UE.

Step 1112: if the PCC strategy in PCRF has change, then the PCC strategy of renewal can be sent to BPCF by the strategy session between BPCF and PCRF that set up by PCRF, BPCF also can according to actual conditions to BNG/BRAS update strategy, and BNG/BRAS can operate accordingly according to the strategy execution upgraded.

Step 1113: the transmission completing data service;

Here, UE can complete transfer of data according to IP1 and IP2 obtained, and the transmission of the data between UE and outside PDN between X-MAG and UE adopts the encapsulation format of IPoverIP, is exactly specifically:

For uplink data messages, the IP address ip 2 encapsulation of data message that UE distributes by 3GPP core net, then the IP address ip 1 that fixed network is distributed on outer envelope; After data arrive X-MAG, outermost layer address ip 1 is peeled off by X-MAG, and data is encapsulated in the PMIPv6 tunnel between X-MAG and P-GW again, sends to P-GW.

For downlink data message, after arriving X-MAG from P-GW, after received data are removed PMIPv6 tunnel head by X-MAG, at the local ip address IP1 that packet outer layer encapsulation fixed network is UE distribution, and route is to UE, after UE receives this data message, peel off outermost layer and time outer field IP address ip 1 and IP2 successively, obtain payload.

Figure 12 is the realization flow of UE off-line/attachment removal under network integration framework of the present invention, based on the network architecture be that X-MAG is set between mobile network and fixed network, X-MAG can realize the MAG function in PMIPv6, the Y interactive interfacing by arranging between X-MAG and UE.Described off-line/detachment process is after UE accesses/be attached to EPS core net by fixed network, again from fixed network off-line/attachment removal or delete certain PDN and connect.Concrete, UE of the present invention from mobile network's off-line/attachment removal flow process as shown in figure 12, comprises the following steps:

Step 1201:UE by fixed network access EPS core net, and sets up at least one PDN and connects.

Step 1202:UE sends the request of PPP session termination to X-MAG, and request off-line/attachment removal/deletion PDN connects;

Here, described PPP session is LCP or NCP, corresponding, the request of PPP session termination is that PPPLCP stops request or is that PPPNCP termination is asked; Generally, UE needs for some reason, off-line/attachment removal may be initiated or delete certain PDN connect operation.

Step 1203:X-MAG sends PBU message to P-GW, and carries lifetime zero setting instruction, and request and P-GW remove tunnel binding;

Here, delete if independent PDN connects, only can remove the PMIPv6 tunnel of that PDN connection that will discharge; If off-line/attachment removal, then to remove each PMIPv6 tunnel respectively; Accordingly, after P-GW receives PBU message, the tunnel binding context with X-MAG can be deleted.

Step 1204:P-GW removes the IP-CAN session between PCRF.

It is right that step 1205:P-GW sends APN/P-GW mark by Diameter signaling to 3GPPHSS/AAA, and notice 3GPPHSS/AAA deletes the mark of P-GW.

Step 1206:P-GW responds PBA message to X-MAG.

Step 1207:X-MAG returns PPP by Y interface to UE and stops response, and notice UE off-line/attachment removal/PDN connects deletion to be completed;

Here, described PPP stops response can be that PPPLCP stops response or PPPNCP stops response; Described notice UE off-line/attachment removal/PDN connects deletion and comprises: notice UEPPP session teardown, PDN connect deletion.

Step 1208: if attachment removal/off-line operation, fixed network has also needed local Connection Release, local resource to discharge; Connect if only delete certain PDN, then only discharge corresponding resource, the resource that other PDN connect continues to retain.

Figure 13 is the realization flow that under network integration framework of the present invention, UE switches from 3GPP Access Network to fixed network, based on the network architecture be that X-MAG is set between mobile network and fixed network, X-MAG can realize the MAG function in PMIPv6, the Y interactive interfacing by arranging between X-MAG and UE.After described handoff procedure refers to that UE accesses/be attached to EPS core net by fixed network, need again for some reason to switch to fixed network.Concrete, UE of the present invention to the switching flow of fixed network as shown in figure 13, comprises the following steps from 3GPP Access Network:

Step 1301:UE completes trusted 3GPPIP by fixed network and accesses.

Step 1302:UE determines to switch to fixed network for some reason;

Here, described reason can be 3GPP wireless access signal variation etc.

Step 1303:UE completes local access authentication and authentication via BNG/BRAS and BBFAAA.

This locality that step 1304:UE and BNG/BRAS sets up fixed network connects, and obtains the local ip address IP1 that fixed network is self distribution.

Step 1305: the triggering receiving local connection establishment step and/or authentication step, BNG/BRAS initiates fixed network strategy session to BPCF and sets up request; BNG/BRAS and BPCF sets up the session applying for/issue dynamic strategy, to realize accurately controlling to Resource Allocation in Networks and user admission.

Step 1306: based on the triggering of step 1305, BPCF initiates strategy session to PCRF and sets up request, Establishment strategy session;

Here, described strategy session is similar to the gateway control session defined in 3GPP; By this session, BPCF obtains relevant QoS and charging policy to tactful universal control point PCRF;

Generally, under roaming scence, BPCF can arrive hPCRF through vPCRF; Under non-roaming scene, there is not vPCRF.

Step 1307a:UE sends PPPLCP configuring request by Y interface to X-MAG, carries out PPPLCP negotiation with X-MAG;

PPPLCP configuring request in the present embodiment belongs to a kind of access/attachment request.

Step 1307b:UE is based on the access authentication carrying out user's access to mobile network between X-MAG and 3GPPHSS/AAA;

Here, adopt the authentication mode based on 3GPP to complete access authentication to user, the described authentication mode based on 3GPP can be EAP-AKA.

Step 1307c:UE sends PPPNCP configuring request to X-MAG, carries out PPPNCP negotiation with X-MAG;

Here, the parameters such as mobile network ID, APN of UE are at least carried in described configuring request; UE sends in the PPPNCP configuring request of X-MAG, can carry or not carry the IP address ip 1 that UE obtains in fixed network.

After step 1308:X-MAG receives the PPPNCP configuring request that UE sends, parsing the fixed network of carrying in signaling is the IP address ip 1 that UE distributes, or from signaling head, obtain the IP address ip 1 that UE obtains in fixed network; After follow-up PMIPv6 tunnel has been set up, X-MAG can set up the corresponding relation of IP1 and PMIPv6 address and store.

Step 1309:X-MAG, as the MAG of PMIPv6, sends PBU message to P-GW, the tunnel binding of request and P-GW.

After step 1310:P-GW receives PBU message, set up the PMIPv6 tunnel binding relation of self and X-MAG, and the resource triggering 3GPP access is deleted.

Step 1311:P-GW responds PBA message to X-MAG, and in this PBA message, carry the IP address ip 2 that 3GPP core net is UE distribution.

Step 1312:X-MAG completes PPPNCP by Y interface and UE and consults, and by PPPNCP configuration response, the IP address ip 2 distributing to UE is sent to UE.

Step 1313: if the PCC strategy in PCRF has change, then the PCC strategy of renewal can be sent to BPCF by the strategy session between BPCF and PCRF that set up by PCRF, BPCF also can according to actual conditions to BNG/BRAS update strategy, and BNG/BRAS can operate accordingly according to the strategy execution upgraded.

Step 1314:P-GW initiates 3GPP access network resource deexcitation flow process;

Here, because UE has been switched to fixed network access, therefore, the related resource of 3GPP Access Network all can deexcitation or deletion, and this step is prior art.

Figure 14 is the realization flow setting up additional PDN connection under network integration framework of the present invention, based on the network architecture be that X-MAG is set between mobile network and fixed network, X-MAG can realize the MAG function in PMIPv6, the Y interactive interfacing by arranging between X-MAG and UE.Due in EPS, UE can visit multiple PDN simultaneously, sets up multiple PDN and connects, obtain multiple/to IPv4/IPv6 address, what this flow process described is exactly after UE attachment, sets up the operating process of additional PDN connection.Concrete, the present invention sets up the flow process of additional PDN connection as shown in figure 14, comprises the following steps:

Step 1401:UE accesses/is attached to EPS core net by fixed network, and concrete access/attachment flow as described in Figure 12.

When step 1402:UE needs additional PDN to connect, send PPPNCP configuring request to X-MAG, carry out PPPNCP negotiation with X-MAG;

Here, the parameters such as mobile network ID, APN of UE are at least carried in described configuring request; UE sends in the PPPNCP configuring request of X-MAG, can carry or not carry the IP address ip 1 that UE obtains in fixed network.

After step 1403:X-MAG receives the PPPNCP configuring request that UE sends, parsing the fixed network of carrying in signaling is the IP address ip 1 that UE distributes, or from signaling head, obtain the IP address ip 1 that UE obtains in fixed network; After follow-up PMIPv6 tunnel has been set up, X-MAG can set up the corresponding relation of IP1 and PMIPv6 address and store.

Step 1404:X-MAG, as the MAG of PMIPv6, sends PBU message to P-GW, the tunnel binding of request and P-GW.

After step 1405:P-GW receives PBU message, create BCE, and distribute the IP address ip 2 of 3GPP core net distribution for UE;

Here, how P-GW sets up IP-CAN session with PCRF is prior art; Wherein, PCRF distinguishes v/hPCRF under roaming scence, there is not vPCRF under non-roaming scene.

It is right that step 1406:P-GW sends APN/P-GW mark by Diameter signaling to 3GPPHSS/AAA, stores the mark of this P-GW.

Step 1407:P-GW responds PBA message to X-MAG, and in this PBA message, carry the IP address ip 2 that 3GPP core net is UE distribution.

Step 1408:X-MAG completes PPPNCP by Y interface and UE and consults, and by PPPNCP configuration response, the IP address ip 2 distributing to UE is sent to UE.

Step 1409: if the PCC strategy in PCRF has change, then the PCC strategy of renewal can be sent to BPCF by the strategy session between BPCF and PCRF that set up by PCRF, BPCF also can according to actual conditions to BNG/BRAS update strategy, and BNG/BRAS can operate accordingly according to the strategy execution upgraded.

The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention, and all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (16)

1. a system for user equipment (UE) access to mobile network, comprises UE, fixed network and mobile network; It is characterized in that, this system also comprises the mobile anchor point gateway X-MAG be arranged between fixed network and mobile network; Described X-MAG is provided with Y interface, and described UE is provided with Y interface, and X-MAG and UE is connected by Y interface;

Described X-MAG, for the treatment of the control signal of UE access to mobile network, and route UE is through the data of mobile network's outgoing or reception;

Connect UE side in the chain of command protocol stack of described X-MAG and be provided with Y Interface Controller surface layer Y-C, connect UE side in the user face protocol stack of described X-MAG and be provided with Y Interface User surface layer Y-U; Described Y-C layer, for being carried on the chain of command signaling on IP layer; Described Y-U layer, for realizing the double-deck IP encapsulation/decapsulation of packet;

Described X-MAG is acted on behalf of with 3GPPAAA server or 3GPPAAA by the Broadband Forum authentication and authorization charging BBFAAA server in fixed network and is connected;

Or described X-MAG directly acts on behalf of with 3GPPAAA or 3GPPAAA and is connected.

2. system according to claim 1, is characterized in that, connects UE side and is also provided with IP layer and bottom bearing bed, be positioned under Y-C layer successively in the chain of command protocol stack of described X-MAG;

Connect UE side in the user face protocol stack of described X-MAG and be also provided with IP layer and bottom bearing bed, be positioned at successively under Y-U layer.

3. system according to claim 1, is characterized in that, described X-MAG is connected with the packet data gateway P-GW being arranged in mobile network;

Connect P-GW side in the chain of command protocol stack of described X-MAG and be disposed with bottom bearing bed, IP layer, PMIPv6 layer from bottom to top;

Connect P-GW side in the user face protocol stack of described X-MAG and be disposed with bottom bearing bed, IP layer, tunnel layer from bottom to top.

4. system according to claim 1, is characterized in that, described mobile network is local network; Described X-MAG is connected with the P-GW being positioned at local network by local interface;

Described mobile network is divided into home network and visited network; Described X-MAG is connected with the P-GW being positioned at home network by roaming interface; Or described X-MAG is connected with the P-GW being positioned at visited network by local interface.

5. a mobile anchor point gateway X-MAG, is characterized in that, for the treatment of the control signal of UE access to mobile network, and route UE is through the data of mobile network's outgoing or reception; Described X-MAG is provided with Y interface, and in the chain of command protocol stack of X-MAG, connects UE side be provided with Y-C layer, connects UE side and be provided with Y-U layer in the user face protocol stack of X-MAG;

Described Y-C layer, for being carried on the chain of command signaling on IP layer; Described Y-U layer, for realizing the double-deck IP encapsulation/decapsulation of packet;

Described X-MAG is acted on behalf of with 3GPPAAA server or 3GPPAAA by the Broadband Forum authentication and authorization charging BBFAAA server in fixed network and is connected;

Or described X-MAG directly acts on behalf of with 3GPPAAA or 3GPPAAA and is connected.

6. X-MAG according to claim 5, is characterized in that, connects UE side and is also provided with IP layer and bottom bearing bed, be positioned under Y-C layer successively in the chain of command protocol stack of described X-MAG;

Connect UE side in the user face protocol stack of described X-MAG and be also provided with IP layer and bottom bearing bed, be positioned at successively under Y-U layer.

7. the X-MAG according to claim 5 or 6, is characterized in that, connects P-GW side and be disposed with bottom bearing bed, IP layer, PMIPv6 layer from bottom to top in the chain of command protocol stack of described X-MAG;

Connect P-GW side in the user face protocol stack of described X-MAG and be disposed with bottom bearing bed, IP layer, tunnel layer from bottom to top.

8. a method for UE access to mobile network, is characterized in that, arranges the mobile anchor point gateway X-MAG be connected between fixed network and mobile network, and arranges Y interface for X-MAG and UE;

In the chain of command protocol stack of described X-MAG, connect UE side Y-C layer is set, in the user face protocol stack of described X-MAG, connect UE side Y-U layer is set; And Y-C layer and Y-U layer are set respectively in the chain of command protocol stack and user face protocol stack of UE;

When UE is via mobile network's outgoing data, UE sends the data to X-MAG, is sent to mobile network side via X-MAG; Or UE is received by X-MAG and forwards by mobile network side the data of coming;

When UE and mobile network's interactive control information, the control signal carrying control information is sent to X-MAG by UE, triggers the associative operation in X-MAG initiation mobile network; Or, after the X-MAG signaling received from mobile network side network element or own event triggers, send Downlink Control Information to UE;

Described X-MAG is acted on behalf of with 3GPPAAA server or 3GPPAAA by the Broadband Forum authentication and authorization charging BBFAAA server in fixed network and is connected;

Or described X-MAG directly acts on behalf of with 3GPPAAA or 3GPPAAA and is connected.

9. method according to claim 8, it is characterized in that, described UE sends the data to X-MAG, being sent to mobile network side via X-MAG is: UE first encapsulates as object IP address as internal layer source IP address, Correspondent Node IP address with the IP address that 3GPP core net is distributed upstream data, again with fixed network be the IP address distributed of UE as outer source IP address, carry out encapsulation location as outer object IP address X-MAG, after through Y-U layer by the transmitting uplink data after encapsulating to X-MAG; X-MAG is to the packet from UE side received, and outer source IP address and object IP address are fallen in decapsulation, retains internal layer source IP address and object IP address, is encapsulated into afterwards in PMIPv6 tunnel and sends;

UE receives by X-MAG the data come by the forwarding of mobile network side: X-MAG encapsulates downlink data solution PMIPv6, retain internal layer source IP address and object IP address, then with fixed network be the address of the IP address distributed of UE as outer object IP address, X-MAG as after the encapsulation of outer source IP address, be transferred to UE through Y-U layer; UE, to the downlink data from X-MAG received, carries out the decapsulation process of two-layer IP address, obtains payload.

10. method according to claim 8, it is characterized in that, the control signal carrying control information is sent to X-MAG by UE, triggering the associative operation that X-MAG initiates in mobile network is: UE as behind object IP address, sends to X-MAG through Y-C layer to the address of upstream control signaling fixed network to be IP address that UE distributes be source IP address, X-MAG; After X-MAG receives the control signal of encapsulation, remove IP address encapsulation, obtain the content of control signal, and initiate follow-up associative operation according to the content of control signal;

After the X-MAG signaling received from mobile network side network element or own event triggers, sending descending control signaling to UE is: X-MAG receives and triggers from the signaling triggering of P-GW and/or 3GPPAAA of mobile network side or the signaling of own event, using control signal fixed network be the IP address distributed of UE as destination address, X-MAG address as after source address encapsulates, send to UE; UE receives rear releasing IP address encapsulation, obtains control signal content.

11. methods according to claim 10, it is characterized in that, described upstream control signaling is: the point-to-point link control protocol PPPLCP configuring request that UE sends to X-MAG or point to point network control protocol PPPNCP configuring request or PPPLCP stops request or PPPNCP stops request;

Described descending control signaling is: X-MAG replys to the PPPNCP configuration that UE sends or PPPLCP configuration is replied or PPPLCP stops response or PPPNCP termination response.

12. methods according to claim 8, is characterized in that, described UE and mobile network also comprise alternately: UE is by carrying out the access authentication of user's access to mobile network between X-MAG and 3GPPHSS/AAA.

13. methods according to claim 8, is characterized in that, when UE accesses/be attached to mobile network, described UE and mobile network's interactive control information specifically comprise:

A1.UE by certification and obtain fixed network be self distribute IP address after, via fixed network and the session of "Policy and Charging Rules Function PCRF Establishment strategy;

A2.UE sends access/attachment request to X-MAG, and to carry fixed network be the IP address that UE distributes, and it is that IP address that UE distributes to be associated with UE relation that X-MAG receives request according to fixed network;

A3. the access authentication of user's access to mobile network is carried out based on X-MAG;

A4.X-MAG is mutual as MAG and the P-GW of PMIPv6, and obtaining 3GPP core net is the IP address that UE distributes, and the IP address of acquisition is sent to UE;

A5.UE completes data transmit-receive by two the IP addresses obtained.

14. methods according to claim 8, is characterized in that, when UE is from mobile network's off-line/attachment removal, described UE and mobile network's interactive control information specifically comprise:

When b1.UE needs off-line/attachment removal or deletes PDN connection, UE sends to X-MAG the request of termination by Y interface;

B2.X-MAG and P-GW is mutual, and request and P-GW remove tunnel binding, and P-GW removes the IP-CAN session between PCRF, and notifies that 3GPPAAA deletes the mark of P-GW;

B3.X-MAG returns termination response by Y interface to UE, and notice UE off-line/attachment removal/PDN connects deletion to be completed.

15. methods according to claim 8, is characterized in that, when UE switches from 3GPP Access Network to fixed network, described UE and mobile network's interactive control information specifically comprise:

When c1.UE determines to be switched to fixed network, first obtaining fixed network is behind the IP address self distributed, and via fixed network and the session of "Policy and Charging Rules Function PCRF Establishment strategy;

C2.UE sends access/attachment request to X-MAG, and to carry fixed network be the IP address that UE distributes, and it is that IP address that UE distributes to be associated with UE relation that X-MAG receives request according to fixed network;

C3. the access authentication of user's access to mobile network is carried out based on X-MAG;

C4.X-MAG is mutual as MAG and the P-GW of PMIPv6, and obtaining 3GPP core net is the IP address that UE distributes, and the IP address of acquisition is sent to UE;

C5.P-GW initiates 3GPP access network resource deexcitation flow process.

16. methods according to claim 8, is characterized in that, when UE sets up the connection of additional packet data net, described UE and mobile network's interactive control information specifically comprise:

When d1.UE needs additional PDN to connect, send PPPNCP configuring request to X-MAG, carry out point to point network control protocol PPPNCP with X-MAG and consult;

After d2.X-MAG receives the PPPNCP configuring request of UE transmission, obtaining fixed network is the IP address that UE distributes;

D3.X-MAG is mutual as MAG and the P-GW of PMIPv6, and request and the tunnel binding of P-GW, obtain the IP address that 3GPP core net is UE distribution;

D4.X-MAG completes PPPNCP by Y interface and UE and consults, and will send to UE by PPPNCP configuration response.