CN102137467B

CN102137467B - WiMAX (Worldwide Interoperability for Microwave Access) system for switching without fixed anchors and switching method thereof

Info

Publication number: CN102137467B
Application number: CN201010100122.XA
Authority: CN
Inventors: 霍玉臻; 吴强; 符涛
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2010-01-22
Filing date: 2010-01-22
Publication date: 2014-12-10
Anticipated expiration: 2030-01-22
Also published as: WO2011088606A1; CN102137467A

Abstract

The invention relates to a WiMAX (Worldwide Interoperability for Microwave Access) system for switching without fixed anchors and a switching method thereof. In the system, an ILCR (Identity Location Control Router) is used for distributing a new location identification for a terminal when the terminal is switched in, releasing resources distributed for the terminal after the terminal is switched out and forwarding data messages for switching the terminal in and out; an AGW (W-ASN Gateway) is used for realizing W-ASN (Wimax Access Service Network)-anchored switching of the terminal, selecting a target ILCR for the switched-in terminal, building a tunnel between the switched-in terminal and the target ILCR and forwarding data messages of the terminal through the tunnel; the ILCR or the AGW is also used for registering the new location identification of the terminal to an ILR (Identity Location Register) of the terminal; and the ILR is used for registering and updating the location identification of the terminal and transmitting a location identification updating notification to all gateways accessed from correspondent nodes of the terminal after receiving a triggering message for updating the correspondent nodes. Through the method and system disclosed by the invention, the switching without fixed anchors can be realized, path circuity of data packages is reduced and transmission delay and bandwidth wastes are decreased.

Description

Wimax system and changing method thereof that realization is switched without fixed anchor point

Technical field

The present invention relates to the switching of communication technical field, relate in particular to a kind of Wimax system and changing method thereof switching without fixed anchor point of realizing.

Background technology

At traditional transmission control protocol/procotol (Transmission Control Protocol/InternetProtocol, TCP/IP) in network environment, IP is that internet (Internet) provides routing function, it has all distributed logical address to all nodes (comprising main frame and router), be IP address, and each port of every main frame all distribute an IP address.IP address packet includes network prefix and host machine part, the IP address of the All hosts on same link has identical network prefix and different host machine part conventionally.This makes IP partly to carry out Route Selection according to the network prefix of the IP address of destination node, thereby makes router order preserve a simple prefix router, and needn't be that every main frame is preserved an independent route.In this case, owing to having adopted prefix router, therefore when node does not change its IP address from a link switching to another link, this node can not receive data message on new link, thereby also just cannot communicate with other nodes.

The network technology of existing application ICP/IP protocol exists following not enough:

Adopt the mobility of the mode support terminal of fixed anchor point, as, Long Term Evolution (Long TermEvlution, LTE) in network, adopt GPRS Tunnel Protocol (GPRS Tunnelling Protocol, GTP), regulation grouped data network gateway (Packet Data Network Gateway, referred to as PGW or PDN GW) is as the mobile anchor point of terminal; In Wimax network, adopt Mobile IP agreement, using home agent (Home Agent, HA) as anchor point.The introducing of fixed anchor point has brought the roundabout problem of packet path, has increased the weight of transmission delay and bandwidth waste.And the route optimization process of MIPV6 need to participate in the main frame support MIPV6 agreement of communication, dispose difficulty.

IP address has dual-use function: both station location markers in network topology as the communication terminal host network interface of network layer, and again as the access sign of transport layer host network interface.When the IP address of main frame changes, not only route will change, and the access sign of communication terminal main frame also can change, and can cause like this routing overhead more and more heavier, and the variation of host identification can cause application and the interruption being connected.

The object that identify label and position separation problem propose is in order to solve the problems such as the semanteme of IP address transships and routing overhead is serious, the dual-use function of IP address is carried out to separation, realize the support that the problems such as exchanging visit between heterogeneous networks region in routing overhead and Next Generation Internet are dynamically heavily distributed, alleviated in mobility, many locals property, IP address.Existing identify label and position split-frame HIP, LISP etc. are in order to overcome this kind of network frame not enough and that build of existing network technology.Host Based HIP agreement etc. need to be done larger change to terminal and upper-layer service, disposes difficulty; Move simultaneously at communication two ends, position more the new stage need network to participate in maintain communications link, otherwise will there is message dropping problem.Network LISP agreement, is the separated subsidiary problem solving afterwards in identity position for mobility and many caves property, also there is no concrete scheme and implementation method now.

Fig. 1 is the network architecture of existing Wimax system, as shown in the figure, the Wimax system of prior art is generally comprised of three parts: terminal, Wimax access business network (Wimax Access ServiceNetwork, abbreviation W-ASN) be connected business network (Wimax Connect ServiceNetwork is called for short W-CSN) with Wimax.

W-ASN mainly carries out following function: two layers (L2) that completes WiMAX terminal connects, devolved authentication mandate charging (Authentication, Authorization and Accounting, AAA) message is selected and finds, is that three layers (L3) of WiMAX terminal are connected tunnel maintenance between relaying, RRM, W-ASN and W-CSN is provided to the network of H-CSN (ownership CSN), network service operator (Network Service Provider, NSP).Under mobile scene, W-ASN also needs to support following function: the mobile management of W-CSN grappling (W-CSN AnchoredMM), paging and idle pulley (Idle Mode) operation;

W-ASN is also for managing I EEE 802.16 air interfaces, for WiMAX terminal use provides wireless access.W-ASN is at least comprised of a base station (Base Station, BS) and an IAD (W-ASNGateway, AGW), can comprise single AGW or a plurality of AGW.W-ASN is in R1 reference point and travelling carriage (Mobile Station, MS) (being referred to as terminal in literary composition) intercommunication, in R3 reference point and W-CSN intercommunication, in R4 reference point and another W-ASN intercommunication.Wherein, the operator of management W-ASN is called NAP (Network Access Provider, network insertion operator).

W-CSN is the combination of a set of network function, and W-CSN can be comprised of HA, AAA agency or server (AAA Proxy/Server), accounting server, interconnecting gateway equipment etc.Wherein, the operator of management W-CSN is called NSP.

W-CSN mainly provides following function: the IP address assignment of end-user session connection, terminal, Internet access, AAA agency or server, terminal use's strategy and tunnel maintenance, terminal use's charging and clearing between license control, W-ASN and W-CSN, roaming, the mobile management between W-CSN and the WiMAX business between W-CSN.

Wherein:

R1 interface is the interface (being called again reference point) between terminal and IAD.

Interface R2 is the logic interfacing between terminal and W-CSN.

Interface R3 is the interface between IAD and W-CSN, and when roaming, Interface R3 is the interface between IAD and visit W-CSN.

Interface R4 is the interface between IAD.

When being roaming, R5 interface visits the interface between W-CSN and ownership W-CSN.

R6 interface is the interface between base station and IAD.

R8 interface is the interface between base station.

In existing WiMAX system, there is the switching of two types: the switching of the switching of W-ASN grappling and W-CSN grappling; Wherein,

It is anchor point that the grappling IAD that comprises grappling datapath function (DPF) is take in the switching of W-ASN grappling, and during switching, terminal is switched to target BS from source base station, and source grappling IAD is constant; When target BS is not grappling IAD in source directly during the object of service, for setting up data channel between the target access gateway of target BS service and source grappling IAD, by this passage, forward the data message of terminal;

The switching of W-CSN grappling be take home agent as anchor point, when terminal completes after the switching of W-ASN grappling, if grappling IAD need to change, source grappling IAD or target access gateway are initiated the switching of W-CSN grappling, after having switched, terminal becomes from target access gateway access from the access of source grappling IAD, and the data channel between source grappling IAD and target access gateway can be deleted, and anchor point home agent does not change; Now, the identity of target access gateway also changes target grappling IAD into.

In sum, the switching in existing WiMAX system, all needs the support of fixed anchor point to complete, and the introducing of fixed anchor point has brought the roundabout problem of packet path, has increased the weight of transmission delay and bandwidth waste.Access sign is applied to WiMAX network with position isolation technics, can support that in theory WiMAX conventional terminal carries out the mobility without fixed anchor point, solve the roundabout problem of packet path, but also can reach the object that solves IP address dual identity, but how based on WiMAX system, to realize without fixed anchor point and switching, also there is no relevant solution at present.

Summary of the invention

The technical problem to be solved in the present invention, is to provide a kind of WiMAX system and changing method thereof switching without fixed anchor point of realizing, and to realize without fixedly described point switching, the path of having reduced packet is roundabout, has reduced transmission delay and bandwidth waste.

For solving above technical problem, the invention provides a kind of changing method without fixed anchor point of Wimax system, comprising:

Terminal completes after the switching of Wimax access business network grappling, source access gateway (AGW) sends AGW handover request to target AGW, this target AGW select target identity position core router (ILCR), and this target ILCR between set up this tunnel while not setting up the tunnel of this terminal data message repeating;

This target ILCR, when different from source ILCR, points to for this terminal distribution the RID that this ILCR is new, preserves the map information of this terminal identity sign (AID) and new RID; This target ILCR or this target AGW initiate RID register flow path, upgrade the RID of this terminal of this terminal attaching identity location register (ILR) preservation; And this terminal attaching ILR initiates more new technological process of RID, receive that the gateway accessing to all Correspondent Nodes of this terminal after the triggering message of upgrading Correspondent Node sends RID update notification, carries the AID of this terminal and new RID;

This target AGW sends AGW handoff response to this source AGW, after having switched, by this target ILCR and this target AGW, forwards the message between this terminal and Correspondent Node.

Further,

In described Wimax system, ILCR or AGW obtain and safeguard according to the data message of the terminal receiving and be not updated to the terminal of terminal attaching ILR and the link information of Correspondent Node;

In handoff procedure, this source, target ILCR or source, target AGW by Correspondent Node information notice request in real time to the link information of this terminal attaching ILR transmitting terminal and Correspondent Node;

This terminal attaching ILR receives after the RID registration request of this object ILCR transmission, initiates more new technological process of RID, and described link information is safeguarded according to the link information of this terminal of receiving and Correspondent Node.

Further,

In this handoff procedure, this source, target ILCR or source, target AGW are by the timing of Correspondent Node information notice request or the quantitative link information to this terminal attaching ILR transmitting terminal and Correspondent Node;

This source ILCR or source AGW send Correspondent Node information transmission request to this terminal attaching ILR, wherein carry this source ILCR and are not updated to the terminal of terminal attaching ILR and the link information of Correspondent Node;

When this target ILCR or target AGW initiate RID register flow path, by target ILCR or target AGW is not updated to the terminal of terminal attaching ILR and the link information of Correspondent Node sends to this terminal attaching ILR;

After the transmission request of Correspondent Node information or RID registration request of arriving after this terminal attaching ILR receives, according to the link information of the terminal of receiving and Correspondent Node, initiate more new technological process of RID, and described link information is safeguarded.

Further,

During the link information of ILCR maintenance terminal and Correspondent Node, source ILCR sends Correspondent Node information transmission request to this terminal attaching ILR after the switching notice of receiving source AGW or this object ILCR; Wherein this source AGW sends this switching notice to this source ILCR after receiving the handoff response that this object AGW sends; This object ILCR sends this switching notice setting up Hou Xianggai source, tunnel ILCR with this object AGW;

During the link information of AGW maintenance terminal and Correspondent Node, source AGW sends Correspondent Node information transmission request to terminal attaching ILR after receiving the handoff response that target AGW sends.

Further,

In described Wimax system, ILCR reports, upgrades the AID-RID map information of the Correspondent Node of this terminal to terminal attaching ILR, and the AID-RID map information of safeguarding the Correspondent Node of this terminal that is not updated to terminal attaching ILR;

Maintain communications is to the target ILCR of client information obtaining communication opposite end AID-RID map information in the following manner:

Receive after the downlink data message that sends to incision terminal, obtain the Correspondent Node AID-RID map information in message; Or

According to the AID of Correspondent Node in data message at the AID-RID of local search Correspondent Node map information; Or

From Correspondent Node ownership, ILR inquires the AID-RID map information of Correspondent Node and is kept at this locality; Or

From AGWHuo source, source ILCR inquiry, obtain the AID-RID map information of Correspondent Node and be kept at this locality.

Further,

In described Wimax system, ILCR or AGW transmit the link information of terminal and Correspondent Node to terminal attaching ILR, and maintenance is not delivered to the terminal of terminal attaching ILR and the link information of Correspondent Node;

This terminal attaching ILR initiates RID more during new technological process, according to the map information of Correspondent Node AID-RID, local configuration information or DNS inquiry, determine the gateway of described Correspondent Node access, gateway to the access of described Correspondent Node sends RID update notification, carries the map information of this terminal AID and new RID;

The gateway of described Correspondent Node access is received after RID update notification, and the AID-RID map information of this terminal of preserving is updated to the described map information carrying in this notice.

Further,

This target AGW and this target ILCR forward the message between this terminal and Correspondent Node by tunnel between the two to the other side;

After tunnel between this target AGW and target ILCR is this target AGW select target ILCR, the dynamic tunnel of this terminal of setting up by tunnel Establishing process, target ILCR obtains the AID of this terminal by this tunnel Establishing process, then is the RID that this terminal distribution is new; Or, the static tunnel that the tunnel between this target AGW and target ILCR is set up after powering on for both, target ILCR is according to the notice of target AGW or by checking that data message knows the AID that has terminal to switch and obtain this terminal.

Further,

In this handoff procedure, this source ILCR receives that Correspondent Node sends to and this data message separated to RID after the data message of this terminal and encapsulate and be transmitted to this source AGW, this source AGW receive after this data message by and this target AGW between forwarding tunnel be forwarded to this target AGW;

Between target AGW and target ILCR, setting up before tunnel or this target AGW selected to set up and to have the target ILCR in static tunnel with this AGW, the data message that this target AGW sends source AGW by the data channel with this terminal sends to this terminal;

Between target AGW and target ILCR, set up after tunnel or this target AGW selected to set up and to have the target ILCR in static tunnel with this AGW, this target AGW by and this target ILCR between the first special-purpose tunnel of setting up data message forwarding that source AGW is sent to target ILCR, target ILCR by and target AGW between the second tunnel of setting up be forwarded to this target AGW, this target AGW sends to this terminal by the data channel with this terminal by this data message again.

Further,

In this handoff procedure, this source ILCR receives that Correspondent Node sends to and this data message separated to RID after the data message of this terminal and encapsulate and be transmitted to this source AGW, this source AGW receive after this data message by and this target AGW between forwarding tunnel be forwarded to this target AGW; The data message that this target AGW sends source AGW by the data channel with this terminal sends to this terminal.

Further, in this handoff procedure:

Setting up between target AGW and target ILCR before tunnel or this target AGW selected to set up and to have the target ILCR in static tunnel with this AGW, by this source ILCR, the data message that sends to this terminal of receiving is separated to RID and encapsulate; This sends to the path of the data message of terminal to be: this source ILCR is transmitted to this source AGW, this source AGW receive after this data message by and this target AGW between forwarding tunnel be forwarded to this target AGW; The data message that this target AGW sends source AGW by the data channel with this terminal sends to this terminal;

Between target AGW and target ILCR, set up after tunnel or this target AGW selected to set up and to have the target ILCR in static tunnel with this AGW, by source ILCR, before receiving the switching notice that target ILCR or source AGW send, after sending to the data message of this terminal, carry out decapsulation, this source ILCR stops after decapsulation, by target ILCR, to carrying out the data message of decapsulation, does not carry out decapsulation; This sends to the path of the data message of terminal to be: this source ILCR receive Correspondent Node send to the data message of this terminal after and be transmitted to this source AGW, this source AGW receive after this data message by and this target AGW between forwarding tunnel be forwarded to this target AGW; This target AGW by and this target ILCR between the first special-purpose tunnel of setting up data message forwarding that source AGW is sent to target ILCR, target ILCR by and target AGW between the second tunnel of setting up be forwarded to this target AGW, this target AGW sends to this terminal by the data channel with this terminal by this data message again.

Further, in this handoff procedure:

When this source ILCR is different from target ILCR, between two ILCR, set up forwarding tunnel, this forwarding tunnel discharges after switching completes;

Before the forwarding tunnel between these two ILCR is set up, source ILCR receives that Correspondent Node is issued after separating RID encapsulation after the data message of this terminal and is transmitted to this source AGW, this source AGW is forwarded to this target AGW, and this target AGW sends to this terminal by the data channel with this terminal by this data message again;

After forwarding tunnel between these two ILCR is set up, source ILCR receives after Correspondent Node is issued the data message of this terminal and is forwarded to this target ILCR by this forwarding tunnel, this target ILCR separates after RID encapsulation this this data message, after forwarding or buffer memory, be forwarded to this target AGW, this target AGW sends to this terminal by the data channel with this terminal by this data message again.

The described mode of setting up forwarding tunnel between two ILCR is:

The identification information of AGWJiang source, this source ILCR sends to this target AGW, and this target AGW, when the target ILCR selecting is different from this source ILCR, re-sends to this target ILCR by the identification information of this source ILCR, and this target ILCR is established to the forwarding tunnel of this source ILCR; Or

After this target AGW select target ILCR, the identification information of this target ILCR is issued to this source AGW, this source AGW, when this target ILCR is different from source ILCR, re-sends to this source ILCR by the identification information of this target ILCR, and this source ILCR is established to the forwarding tunnel of this target ILCR.

Further,

In this handoff procedure, this target ILCR receives that Correspondent Node sends to after the downlink data message solution RID encapsulation of this terminal by broad sense Forwarding plane, by the tunnel between this target ILCR and target AGW, by this data message forwarding, give this target AGW, this target AGW sends to this terminal by the data channel with this terminal by this data message again.

Further,

This terminal attaching ILR completes Correspondent Node more before new technological process, if receive new Correspondent Node information, according to this new Correspondent Node information, determines the gateway of this Correspondent Node access, and again sends RID update notification to the gateway of this Correspondent Node access;

If there is this terminal AID-RID map information in Correspondent Node ownership ILR, the gateway of Correspondent Node access or this terminal attaching ILR notice Correspondent Node ownership ILR upgrade this terminal AID-RID map information.

Further,

In this handoff procedure, it is as follows that this terminal sends to the data message path of Correspondent Node of access different I LCR:

In handoff procedure, all adopt path one forwarding: this target AGW by and this source AGW between forwarding tunnel data message forwarding that this terminal is sent to this source AGW, this source AGW arrives this source ILCR by this data message forwarding, this source ILCR carries out RID encapsulation and forwarding to this data message, sends to the gateway of this Correspondent Node access through broad sense Forwarding plane; Or

In handoff procedure, first adopt one forwarding of described path, after this target AGW and target ILCR set up dynamic tunnel or after this target AGW selected to set up and have the target ILCR in static tunnel with this AGW, change path two forwardings into: this target AGW by and this target ILCR between tunnel data message forwarding that this terminal is sent to this target ILCR, this target ILCR carries out RID encapsulation and forwarding to this data message, sends to the gateway of this Correspondent Node access through broad sense Forwarding plane.

Further,

When this target ILCR is identical with source ILCR, this target ILCR adopts the RID encapsulation of carrying out data message for the RID of this terminal distribution, after this target AGW and target ILCR set up after dynamic tunnel or this target AGW selected to set up and have the target ILCR in static tunnel with this AGW, to this source, AGW returns to AGW handoff response; Or

When this target ILCR is identical with source ILCR, this target ILCR divides new RID and preserves this terminal AID and the map information of new RID for this terminal, and adopts identical mode when different with source ILCR from this target ILCR to initiate RID register flow path and to the RID of opposite end new technological process more.

Further,

This target ILCR, after being the RID that this terminal distribution is new, initiates RID register flow path by this target ILCR, to this terminal attaching ILR, sends RID registration request, carries AID and this new RID of this terminal; Or this target ILCR, after being the RID that this terminal distribution is new, sends to this target AGW by this new RID, by this target AGW, initiate RID register flow path, to this terminal attaching ILR, send described RID registration request;

This terminal attaching ILR receives after described RID registration request, and the RID of this terminal of preserving is updated to this new RID.

Further,

AGW in described Wimax system is arranged in access business network, comprises datapath function (DPF); ILCR in described Wimax system is arranged in and connects business network, the function that comprises home agent (HA) and/or W-CR (Wimax core router), between ILCR and broad sense Forwarding plane, have data-interface, described broad sense Forwarding plane is supported route and the forwarding of the data message of RID encapsulation.

Further,

This target AGW is after this terminal attaching ILR sends described RID registration request, or, this target AGW and target ILCR between tunnel set up after, to source AGW, send AGW handoff response;

AGWHe source, this source ILCR discharge for the resource of this terminal distribution at least comprises the forwarding tunnel between this source AGW and this target AGW, between the ILCR of AGWHe source, this source, be this terminal of Ji Gai source, the tunnel AGWHuo source ILCR preservation of this terminal foundation and the link information of Correspondent Node.

For solving above technical problem, the present invention also provides a kind of Wimax system of switching without fixed anchor point that realizes, comprise access business network and be connected business network, access business network comprises base station and IAD (AGW), described connection business network comprises identity location register (ILR)

In described connection business network, also comprise identity position core router (ILCR), between described connection business network and access business network and broad sense Forwarding plane, there is data-interface;

Described ILCR is for when terminal cut, for the new station location marker of this terminal distribution (RID) and preserve the map information of this terminal identity sign (AID) and this new RID; After terminal cuts out, be released to the resource of this terminal distribution; And carry out forward process to cutting, cut out the data message of terminal;

Described AGW is for realizing the switching of Wimax access business network (W-ASN) grappling of terminal, and be incision terminal select target ILCR, and this target ILCR between also set up this tunnel while not setting up the tunnel of incision terminal data message repeating, by this tunnel, forward the data message of incision terminal.

Described ILCR or AGW are also for registering to incision terminal attaching ILR the RID that this terminal is new;

Described ILR, for the RID of register update terminal, and receives that the gateway accessing to all Correspondent Nodes of this terminal after the triggering message of upgrading Correspondent Node sends RID update notification.

The changing method without fixed anchor point of Wimax system of the present invention and Wimax system the identify label mobile communications network separated with position is applied to WiMAX network, when terminal is moved switching, by terminal attaching identity location register (ILR) after receiving the triggering message of upgrading Correspondent Node, gateway (the AGW of notice Correspondent Node access, ILCR or other gateway are as borde gateway) new terminal AID-RID map information more, thereby realize the switching without fixed anchor point, the path of having reduced packet is roundabout, transmission delay and bandwidth waste have been reduced, but also can reach the object that solves IP address dual identity.

Accompanying drawing explanation

Accompanying drawing explanation is used to provide a further understanding of the present invention, and forms a part for specification, for explaining the present invention, is not construed as limiting the invention together with embodiments of the present invention.

Fig. 1 is the network topology schematic diagram based on identify label and position separation.

Fig. 2 is the schematic diagram of the topological relation of network based on identify label and position separation and Legecy IP network (traditional IP).

Fig. 3 is existing WiMAX network architecture schematic diagram.

Fig. 4 a is the identify label WiMAX network architecture separated with position schematic diagram one.

Fig. 4 b is the identify label WiMAX network architecture separated with position schematic diagram two.

Fig. 5 is the flow chart that the present invention realizes the embodiment mono-of the changing method switching without fixed anchor point.

Fig. 6 is the flow chart that the present invention realizes the embodiment bis-of the changing method switching without fixed anchor point.

Fig. 7 is the flow chart that the present invention realizes the embodiment tri-of the changing method switching without fixed anchor point.

Fig. 8 is the flow chart that the present invention realizes the embodiment tetra-of the changing method switching without fixed anchor point.

Fig. 9 is the flow chart that the present invention realizes the embodiment five of the changing method switching without fixed anchor point.

Figure 10 is the flow chart that the present invention realizes the embodiment six of the changing method switching without fixed anchor point.

Figure 11 is the flow chart that the present invention realizes the embodiment seven of the changing method switching without fixed anchor point.

Figure 12 is the flow chart that the present invention realizes the embodiment eight of the changing method switching without fixed anchor point.

Figure 13 is the flow chart that the present invention realizes the embodiment nine of the changing method switching without fixed anchor point.

Figure 14 is the flow chart that the present invention realizes the embodiment ten of the changing method switching without fixed anchor point.

Figure 15 is the flow chart that the present invention realizes the embodiment 11 of the changing method switching without fixed anchor point.

Figure 16 is that AGW of the present invention or ILCR report, upgrade Correspondent Node information flow chart to ILR.

Embodiment

The main thought of the changing method without fixed anchor point of Wimax system of the present invention and Wimax system is, the identify label mobile communications network separated with position is applied to WiMAX network, when terminal is moved switching, by terminal attaching identity location register (ILR) after receiving the triggering message of upgrading Correspondent Node, gateway (the AGW of notice Correspondent Node access, ILCR or other gateway are as borde gateway) new terminal AID-RID map information more, thereby realize the switching without fixed anchor point, the path of having reduced packet is roundabout, transmission delay and bandwidth waste have been reduced, but also can reach the object that solves IP address dual identity.

It shown in Fig. 2, is a kind of identify label separated with position (SILSN:Subscriber Identifier & Locator Separation Network) framework, the network topology of this SILSN framework is divided into does not have overlapping Access Network and backbone network on topological relation, Access Network is positioned at the edge of backbone network, be responsible for the access of all terminals, backbone network is responsible for route and the forwarding of the inter-terminal data message of access.

In the network of SILSN framework, there are two kinds of sign types: access sign (AID:Access Identifier) and Route Distinguisher (RID:Routing Identifier).Wherein, AID is the User Identity of terminal, and network, for each terminal use distributes an AID, remains constant in fast mobile terminal process; RID is that network is the station location marker of terminal distribution, at backbone network, uses.It should be noted that identify label and station location marker can have different titles at different SILSN frameworks, but essence is the same.User is signing to be become after this architecture network user, can Gai user attaching authentication center and ownership ILR in the operation of distributing telephone numbers of opening an account, authentication center and ILR record this user's attribute data, are included as the AID of this user assignment.After the processing that completing opens an account distributes telephone numbers, AID is given this user by static allocation, and in effective legal duration of this user, this user's AID is constant.

In SILSN framework, terminal can be one or more in mobile terminal, fixed terminal and roam terminals, as mobile phone, landline telephone, computer and server etc.

In SILSN framework, Access Network is used to terminal that two layers of (physical layer and link layer) access means, the physics access link between maintenance terminal and ASN are provided.Two layers of possible access means comprise: cellular mobile network technology (GSM/CDMA/TD-SCDMA/WCDMA/Wimax/LTE), DSL, Broadband optical access or WiFi access etc.

In SILSN framework, access service node is used to terminal to provide access service, maintenance terminal to be connected with network, is terminal distribution RID, safeguards AID-RID map information, to mapping forward plane, register and the RID of inquiry terminal, and realize the functions such as the route of data message and forwarding.

In SILSN framework, the main network element of backbone network comprises:

Access service node (ASN:Access Service Node) is used to terminal distribution RID, the AID-RID map information of maintenance terminal, to the RID of ILR registration and inquiry terminal, and the route and the forwarding that realize data message, terminal must be through ASN access backbone network.The address information that the RID that ASN distributes comprises this ASN, during destination address using this RID as data message, this data message will be routed to this ASN.

Generic router (CR:Common Router), for carrying out routing according to the RID of data message, forwards and take the data message that RID is destination address.

Identity location register (ILR:Identity Location Register), ILR, for preserving identify label and the station location marker map information of terminal, is also written as AID-RID map information in literary composition, process the registration of terminal location, cancellation and inquiry;

Alternatively, backbone network can also comprise:

Packet forwarding (PTF:Packet Transfer Function), also referred to as packet forwarding node, for route with forward and take the data message that AID is destination address.

Interconnect services node (ISN), there is the interface with generic router, ASN and ILR, for inquiring about, safeguard the AID-RID map information of present networks terminal, the data message coming and going between encapsulation, route and forwarding present networks and traditional IP, realizes interconnecting of two networks.

Above-mentioned ILR, or ILR and PTF formed the mapping forward plane of backbone network, CR, or CR and ISN have formed the broad sense Forwarding plane of backbone network.In backbone network, can also comprise other network elements such as authentication center.

The SILSN framework initial stage can traditional IP one or more isolated island form Existence and developments, or as the expansion of traditional IP.The topological relation of SILSN framework and traditional IP as shown in Figure 3, the backbone network of SILSN framework part with Traditional IP in same plane, by ISN and traditional IP intercommunication.SILSN framework possesses the ability of independent networking, can form and depart from the network that traditional IP develops alone, and in this stage, functional entity ISN will no longer exist.

The present invention in WiMAX system, realizes above-mentioned SILSN framework applications without fixed anchor point and switches.SILSN framework and the operation principle thereof according to background technology, recorded can be understood, and when fast mobile terminal occurs across the switching of ASN, the target ASN of incision one side will be terminal distribution RID, to this terminal attaching ILR, initiates registration; The source ASN that cuts out a side will delete the AID-RID map information of this terminal, and safeguards the AID-RID map information of all Correspondent Nodes of this terminal.In order to make Correspondent Node send to the message of this terminal can be routed to rapidly target ASN, need to send RID update notification to the gateway of Correspondent Node access.In handoff procedure, source ASN need to forward the message that Correspondent Node sends to this terminal to target ASN.

Below, mainly for being described for realize the improvement of carrying out without fixed anchor point switching on original system, comprise relevant function and flow process.In literary composition, the network element that the Correspondent Node of terminal is accessed is referred to as opposite end network element; In order to express easily, when the function of certain network element of statement, the user terminal that is linked into this network element is called to terminal, is called Correspondent Node with the user terminal that accesses the user terminal communication of this network element.In addition,, because the present invention's realization is to switch without fixed anchor point, therefore the source grappling IAD in former switching flow is referred to as to source access gateway, target grappling IAD is referred to as target access gateway.

Fig. 4 a, Fig. 4 b are applied to the system after WiMAX network by above-mentioned identify label and position isolation technics.

In order to express easily, when the function of certain network element of statement, the user terminal that is linked into this network element is called to terminal, with the user terminal communication of this network element of access be called Correspondent Node.

In the present invention, Correspondent Node information comprise following one or more: the link information of terminal and Correspondent Node (being the mapping of terminal AID and Correspondent Node AID), Correspondent Node AID-RID map information.

Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is described in further detail, so that those skilled in the art can better understand the present invention also, can be implemented, but illustrated embodiment is not as a limitation of the invention.

System one

Fig. 4 a is the schematic diagram of the network architecture of a kind of Wimax system of application above-mentioned identify label and position isolation technics, and in figure, solid line represents the connection of loading end, and dotted line represents the connection of chain of command.This Wimax network architecture comprises access business network (W-ASN) and is connected business network (W-CSN).Connect business network and there is the data surface interface to broad sense Forwarding plane, be expressed as D interface.Broad sense Forwarding plane can be to support by the packet data network of RID route and forwarding data packets, and other embodiment are same.

In W-CSN, there is original network elements such as authentication and authorization charging (AAA) agency or server (AAAProxy/Server), also be provided with identity position core router (Identity LocationCore Route, abbreviation ILCR), identity location register (ILR) and packet forwarding (PTF), ILR and PTF can close and establish, be expressed as ILR/PTF, the ILR/PTF in each W-CSN has formed mapping forward plane.Wherein, ILCR has gathered the function of HA and/or W-CR (Wimax core router), and has the identify label of realizing required new function separated with position.

W-ASN comprises base station and IAD, on the basis of the functional entity that the IAD of IAD wherein in Wimax framework has (as grappling datapath function (Anchor DPF), authentication device etc.), expanded and realized identify label required new function separated with position.

In native system; IAD (AGW) is arranged in WiMAX access business network (W-ASN), be used to terminal distribution RID, RID to ILR registration and unregistration terminal, RID to ILR query communication opposite end, safeguard and be not updated to the terminal of ILR and the link information of Correspondent Node, maintenance terminal and Correspondent Node AID-RID map information, report, upgrade Correspondent Node information to terminal attaching ILR, data message is carried out to RID encapsulation and decapsulation, and the route and the forwarding that according to RID, realize data message.

Identity position core router (ILCR) is arranged in W-CSN, and for route with forward and take the data message that RID is source address and destination address, this function is similar to router of the prior art;

ILR, be arranged in W-CSN, for receiving the registration and unregistration request of described AGW to this ILR home subscriber terminal, safeguard the AID-RID map information of home subscriber terminal, and the inquiry request of reception to terminal RID, RID corresponding to this terminal AID in request returned to inquiry request side, and receive that the gateway accessing to all Correspondent Nodes of this terminal after the triggering message of upgrading Correspondent Node sends RID update notification.

Relevant to switching, (not particularly pointing out below, corresponding to embodiment mono-to three):

AGW is for when terminal cut, for the new station location marker of this terminal distribution (RID) and preserve the map information of this terminal identity sign (AID) and this new RID, registers the RID of this terminal to this terminal attaching ILR; After terminal cuts out, discharge the resource to this terminal distribution; And carry out forward process to cutting, cut out the data message of terminal;

ILR, is arranged in W-CSN, for registering, the RID of cancellation, inquiry terminal, and receives that the gateway to all Correspondent Nodes accesses of this terminal sends RID update notification after the triggering message of upgrading Correspondent Node.

Particularly, AGW comprises:

Cut out control module, for sending AGW handover request to target AGW, after having switched, be released to the resource of this terminal distribution;

Incision control module, for after receiving AGW handover request, sends and distributes notice to station location marker (RID) distribution module, carries incision terminal AID, afterwards, sends registration notification, and return to AGW handoff response to source AGW to RID Registering modules; Also, for select target ILCR after receiving AGW handover request, to this tunnel, set up module and send tunnel foundation notice;

It is described that to cut out the AGW handover request that control module sends to target AGW be grappling datapath function (DPF) handover request; The AGW handoff response that described incision control module sends to source AGW is grappling DPF handoff response.

RID distribution module, for point to the new RID of this AGW for this terminal distribution after receiving distribution notice, preserves the map information of this terminal AID and this new RID;

RID Registering modules, for initiate RID register flow path after receiving registration notification, sends RID registration request to terminal attaching identity location register (ILR), upgrades the RID of this terminal of this terminal attaching ILR preservation;

Link information maintenance module, for reporting, upgrade this terminal and Correspondent Node link information to terminal attaching ILR, and maintenance is not updated to the terminal of terminal attaching ILR and the link information of Correspondent Node, the correspondence relationship information that the link information of this terminal and Correspondent Node comprises this terminal AID and all Correspondent Node AID;

Packet forwarding module, for the data message of incision terminal is carried out to RID encapsulation, separate RID encapsulation and forward and to target side, forward receiving after will sending to the data message that cuts out terminal, also for the data message of the terminal from receiving, parse the link information of terminal and Correspondent Node, and notify link information maintenance module to safeguard;

The data message of the said terminal of the present invention comprises and sends to the uplink data messages that the downlink data message of terminal and terminal send.

Module is set up in tunnel, for after receiving tunnel foundation notice, is the dynamic tunnel between the foundation of incision terminal and this target ILCR;

Described ILR comprises:

Location registration process module, for after receiving the RID registration request that AGW sends, the AID of register update terminal and the correspondence relationship information of RID;

RID update module, for trigger message according to the renewal Correspondent Node of receiving, initiate more new technological process of RID, gateway to all Correspondent Node accesses of this terminal sends RID update notification, carry the AID of this terminal and new RID, particularly, initiating RID more during new technological process, according to the map information of Correspondent Node AID-RID, local configuration information or DNS inquiry, determine the gateway of described Correspondent Node access, gateway to the access of described Correspondent Node sends RID update notification, carries the map information of this terminal AID and new RID.

Described ILCR comprises packet forwarding module, for route with forward and take the data message of RID as source address and destination address.

Further,

Described link information maintenance module reports, upgrades the link information of this terminal and Correspondent Node in real time to terminal attaching ILR; The RID update module that triggers this ILR initiate RID more the renewal Correspondent Node of new technological process trigger the RID registration request that message refers to that AGW sends.

Further,

Described link information maintenance module timing or the quantitative link information that reports, upgrades this terminal and Correspondent Node to terminal attaching ILR;

Cut out control module, also for send Correspondent Node information transmission request to terminal attaching ILR after receiving the handoff response that this object AGW sends, wherein carry this link information maintenance module and be not also updated to the terminal of terminal attaching ILR and the link information of Correspondent Node, and notify this link information maintenance module to stop cutting out the maintenance of the link information of terminal;

In the RID registration request that described RID Registering modules sends, carry this link information maintenance module and be not also updated to the terminal of terminal attaching ILR and the link information of Correspondent Node;

Trigger the RID update module of this ILR and initiate RID the transmission request of Correspondent Node information or RID registration request that more the renewal Correspondent Node triggering message of new technological process arrives after referring to.

Further,

Described AGW also comprises map information maintenance module, for report, upgrade the AID-RID map information of the Correspondent Node of this terminal to terminal attaching ILR, and the AID-RID map information of safeguarding the Correspondent Node of this terminal that is not updated to terminal attaching ILR.

The map information maintenance module of described AGW is the AID-RID map information of obtaining communication opposite end in the following manner:

According to the downlink data message that sends to terminal of receiving, resolve and obtain; Or

From Correspondent Node ownership ILR, inquire the AID-RID map information of Correspondent Node; Or

From AGWHuo source, source ILCR inquiry, obtain the AID-RID map information of Correspondent Node.

Further, (corresponding embodiment mono-)

Packet forwarding module in described AGW is received and is issued after the downlink data message that cuts out terminal, by and target AGW between forwarding tunnel be forwarded to this target AGW, while receiving the downlink data message of issuing incision terminal, by the data channel with this terminal, send to this terminal.

Further, (corresponding embodiment bis-, three)

Described ILCR also comprises that tunnel sets up module, be used to incision terminal set up with source ILCR between forwarding tunnel, or for cutting out the forwarding tunnel between terminal foundation and target ILCR, and after switching completes, discharge this forwarding tunnel;

Packet forwarding module in described ILCR is in handoff procedure, and the data message that issuing of receiving is cut out to terminal is first transmitted to source AGW, after the forwarding tunnel between source, target ILCR is set up, by this forwarding tunnel, is forwarded to this target ILCR; To receive issue incision terminal data message, by and target AGW between tunnel be transmitted to this target AGW.

System one is set up the mode in tunnel between ILCR following two kinds: (corresponding embodiment bis-)

One, described in (corresponding embodiment bis-), cut out control module also for the identification information of source ILCR is sent to target AGW; When described incision control module is also different from this source ILCR for the target ILCR selecting, the identification information of source ILCR is sent to target ILCR; Module is set up for be established to the forwarding tunnel of this source ILCR according to the identification information of the source ILCR receiving in tunnel in described ILCR;

Two, (corresponding embodiment tri-) described incision control module is also for issuing source AGW by the identification information of target ILCR; The described control module that cuts out also when the target ILCR receiving is different from source ILCR, sends to source ILCR by the identification information of this target ILCR; Module is set up for be established to the forwarding tunnel of this target ILCR according to the identification information of the target ILCR receiving in tunnel in described ILCR.

Further,

Described when cutting out control module and sending handover request to target AGW, the packet forwarding module in this AGW sends the first notice;

Described incision control module receives when source AGW sends handover request, and the packet forwarding module in this AGW sends the second notice;

Packet forwarding module in described AGW, before receiving described the first notice, is separated after RID encapsulates and is forwarded to target AGW again the downlink data message that cuts out terminal of receiving, receives that described the first notice is directly forwarded to target AGW afterwards; Before receiving described the second notice, the downlink data message that source AGW is forwarded to the incision terminal of coming directly sends to terminal, receives that described the second notice re-sends to terminal afterwards after separating RID encapsulation; The downlink data message that target ILCR is forwarded to the incision terminal of coming is all separated RID encapsulation, then sends to this terminal by the data channel with this terminal.

Further,

Packet forwarding module in described AGW is forwarded to source ILCR by the uplink data messages that cuts out terminal of receiving, before receiving described the first notice, also this uplink data messages is carried out to RID encapsulation; The uplink data messages that the incision terminal of receiving is sent, as and target ILCR between tunnel do not set up, this uplink data messages is forwarded to source AGW, after receiving described the second notice, also this uplink data messages is carried out to RID encapsulation, as and target ILCR between tunnel set up, to this uplink data messages carry out after RID encapsulation by and target ILCR between tunnel be forwarded to this target ILCR or by and source AGW between tunnel be forwarded to source AGW.

Further,

Corresponding to all embodiment of the present invention, the mode of described incision control module select target ILCR is a kind of in following mode:

Mode one, described incision control module are mutual with the aaa server of incision terminal attaching, obtain the information of the ILCR that this target AGW can connect, therefrom select an ILCR as target ILCR;

The ILCR that the incision terminal that mode two, described incision control module are sent from source AGW allows to access, select an ILCR as target ILCR, the ILCR of described permission access is that the aaa server of this incision terminal attaching sends to source AGW;

Mode three, described incision control module are according to the configuration information select target ILCR of this AGW.

Following examples one to embodiment tri-all realize terminal based on above system one to be switched without fixed anchor point.Below in conjunction with accompanying drawing and to each embodiment, be described in detail.

Embodiment mono-

Fig. 5 realizes based on system one the first flow chart that terminal is switched without fixed anchor point, uses forwarding tunnel between AGW to carry out the scene of data retransmission in handoff procedure, and its concrete steps are described below:

Step 501, when the fast mobile terminal in connected state and complete after the switching of W-ASN grappling, terminal switches to from target BS access from source base station access, and has set up data channel between source AGW and target AGW;

Except particularly pointing out, the terminal of mentioning in flow process refers to this terminal switching, and other embodiment are same.

Terminal can complete by existing standard the switching of W-ASN grappling.Between source AGW and target AGW, set up after data channel, terminal up-downgoing data message path is as shown in D501, D502:

D501, downlink data message path:

Source ILCR receives that Correspondent Node issues after the data message of terminal, be transmitted to source AGW, source AGW peels off the RID encapsulating in this data message, revert to after the form of the data message that Correspondent Node sends, by the data channel between source AGW and target AGW by data message forwarding to target AGW, target access gateway again by this message by mailing to this terminal with terminal data passage.

D502, uplink data messages path:

Terminal sends upstream data literary composition to target BS, target BS by data message forwarding to target AGW, target AGW by the data channel between source AGW and target AGW by data message forwarding to source AGW, source AGW carries out RID encapsulation and forwarding to data message, through this source ILCR and/or mapping forward plane, be forwarded to broad sense Forwarding plane, then through broad sense Forwarding plane, send to the gateway of opposite end access, as AGW, ILCR can be also that other gateway is as borde gateway.

In literary composition, certain network element carries out RID encapsulation to data message, and to ASN in background technology, data message to be carried out to RID encapsulation with forwarding be similar with forwarding, specifically: this network element is searched the RID of Correspondent Node from the AID-RID map information of local cache according to the AID of Correspondent Node, as find, using the RID of this terminal and Correspondent Node respectively as source, destination address is encapsulated in data message, directly be forwarded to broad sense Forwarding plane (when this network element is ILCR, or while there is no ILCR) or be forwarded to source ILCR after by source ILCR, be forwarded to broad sense Forwarding plane (when this network element is AGW) again, as do not found, this network element is encapsulated in data message the RID of this terminal as source address, is forwarded to mapping forward plane or is forwarded to mapping forward plane through source ILCR, inquires RID the buffer memory of Correspondent Node to ILR simultaneously.When not finding the RID of Correspondent Node, can also adopt another kind of RID encapsulation and pass-through mode: first data message is cached to this locality, from ILR, inquire again RID the buffer memory of Correspondent Node, and then using the RID of this terminal and Correspondent Node respectively as source, destination address is encapsulated in data message, after being directly forwarded to broad sense Forwarding plane or being forwarded to source ILCR, is forwarded to broad sense Forwarding plane again by source ILCR.

The described uplink and downlink data message of each embodiment path is all the situations while accessing different AGW (while not there is not ILCR) or ILCR for terminal and Correspondent Node, if terminal and Correspondent Node access identical AGW (while not there is not AGW) or ILCR, AGW or ILCR can not carry out encapsulation and/or the inquiry RID of RID, directly by this AGW or ILCR, be forwarded to Correspondent Node, during forwarding, also do not need to peel off the encapsulation of RID.Certainly AGW or ILCR also can not judge whether to access identical AGW or ILCR, and the mode while all adopting the different AGW of above-mentioned access or ILCR encapsulates, route and forwarding.Other embodiment herewith.

In addition, in literary composition, between two network elements, comprised the processing of tunnel encapsulation and decapsulation during by tunnel forwarding data, also explanation no longer one by one in literary composition.

In data message process of transmitting, source AGW safeguards the link information of terminal and Correspondent Node, as upgraded this link information (as deleted the AID of the Correspondent Node that is defined as off-line) according to the real-time testing mechanism of stream, can check data message, the AID of Correspondent Node new in data message, RID are added in link information, and preserve the RID etc. of the Correspondent Node inquire to ILR.

In data message transmitting-receiving process, source AGW reports, upgrades Correspondent Node information to terminal attaching ILR, and the optional Correspondent Node information of safeguarding, upgrading local preservation.

Step 502, when target AGW prepares to initiate AGW reorientation, sends grappling DPF handoff trigger message to source AGW, and this step is optional;

Step 503, source AGW sends grappling DPF handover request to target AGW;

Source AGW can carry out after grappling DPF switching receiving target AGW grappling DPF handoff trigger message and agree to, sends grappling DPF handover request.Also in the time of can being source AGW decision initiation grappling AGW reorientation, send grappling DPF handover request.

After this, terminal up-downgoing data message path is still as shown in D501, D502.Just now by target AGW, data message is encapsulated and decapsulation.

In data message process of transmitting, target AGW reports, upgrades Correspondent Node information to terminal attaching ILR, and the optional Correspondent Node information of safeguarding, upgrading local preservation.May exist for same Correspondent Node, source AGW has upgraded ILR, and target AGW upgrades ILR once more, and now, ILR covers original data or do not process, and in system one other embodiment, occurs this situation, also does same processing, follow-up no longer detailed description.

Step 504, target AGW is the RID that this terminal distribution is new, and in this locality, preserves and upgrade this terminal AID-RID map information;

Step 505, target AGW select target ILCR, and to target ILCR, initiate tunnel Establishing process, the tunnel between foundation and target ILCR;

In tunnel establishment procedure between target AGW and target ILCR, target AGW sends to target ILCR by the AID of this terminal, and the dynamic tunnel in literary composition is all that this terminal for switching is set up, and other embodiment herewith.Target ILCR also may need to complete alternately authentication with ownership aaa server.

In literary composition, between AGW and ILCR, all can there be various ways in tunnel between ILCR and ILCR, and as L2TPv3, IP-in-IP, MPLS (LDP-based and RSVP-TE based), GRE, MIP and IPsec etc., the present invention is not limited to any specific mode.When adopting MIP, the establishment in tunnel, maintenance are identical with existing WiMAX network.

After this, terminal up-downgoing data message path is as shown in D503, D504:

D503, downlink data message path: source ILCR receives that Correspondent Node issues after terminal data message, be transmitted to source AGW, source AGW by the data channel between source AGW and target AGW by data message forwarding to target AGW, target AGW peels off the RID encapsulating in this data message, revert to after the form of the data message that Correspondent Node sends, target access gateway by this message by mailing to this terminal with terminal data passage.

D504, uplink data messages path: terminal sends upstream data literary composition to target BS, target BS by data message forwarding to target AGW, target AGW carries out RID encapsulation and forwarding to data message, through target ILCR and/or mapping forward plane, be forwarded to broad sense Forwarding plane, then through broad sense Forwarding plane, send to the gateway of opposite end access.

In data message process of transmitting, target AGW reports, upgrades Correspondent Node information to terminal attaching ILR, and the optional Correspondent Node information of safeguarding, upgrading local preservation.

Step 506, target AGW, after distributing new RID, initiates RID register flow path to terminal attaching ILR, by RID registration request, the map information of the AID of this terminal and new RID is sent to this ILR;

If also have the not information of reporting terminal ownership ILR in local Correspondent Node information of preserving, the information not reporting is carried to reporting terminal ownership ILR in message, this ILR preserves the information of the Correspondent Node of receiving.If preserved Correspondent Node AID-RID map information in terminal attaching ILR, the Correspondent Node information that target AGW reports terminal attaching ILR in this step comprises the link information of terminal and Correspondent Node, Correspondent Node AID-RID map information; Otherwise, only need the link information of reporting terminal and Correspondent Node.

Step 507, ownership ILR receives after the RID registration request of target AGW, verifies the legitimacy of AID, and preserves the map information of the current AID-RID of terminal;

In another embodiment, aaa server may close and establish with ILR, is expressed as AAA/ILR.Now, target AGW can be after being the RID that terminal distribution is new, the register flow path of step 506 and step 507 is combined with the tunnel Establishing process that step 505 target ILCR initiates, take this terminal AID and new RID to target ILCR, the identifying procedure that this target ILCR recycles terminal attaching AAA/ILR takes the new RID of this terminal AID to this terminal attaching AAA/ILR, and this terminal attaching AAA/ILR is updated to by the RID of this terminal of preserving this new RID receiving.Other embodiment also can do this variation.

After this, terminal up-downgoing data message path is as shown in D505, D506:

D505, downlink data message path: target ILCR receives that Correspondent Node issues after terminal data message, be transmitted to target AGW, target AGW peels off the RID encapsulating in this data message, revert to after the form of the data message that Correspondent Node sends, target AGW by this message by mailing to this terminal with terminal data passage.

D506, uplink data messages path: same D504.

Now, also can there is the data message being forwarded by source ILCR, this be due to also fail to give notice Correspondent Node access gateway not more new terminal AID-RID map information cause, the same D503 in downlink data message path at this moment.

Step 508, target AGW sends grappling DPF handoff response to source AGW, completes the switching of AGW;

Step 509, source AGW sends Correspondent Node information transmission request to terminal attaching ILR;

If also have the not information of reporting terminal ownership ILR in local Correspondent Node information of preserving, the information not reporting is carried to reporting terminal ownership ILR in message, this ILR preserves the information of the Correspondent Node of receiving.If preserved Correspondent Node AID-RID map information in terminal attaching ILR, the Correspondent Node information that source AGW reports terminal attaching ILR in this step comprises the link information of terminal and Correspondent Node, Correspondent Node AID-RID map information; Otherwise, only need the link information of reporting terminal and Correspondent Node.

Step 510, terminal attaching ILR, according to the RID of Correspondent Node, to the gateway transmission RID update notification of all opposite ends access, carries the AID of this terminal and new RID;

Step 511, terminal attaching ILR completes after Correspondent Node renewal, responds Correspondent Node information transmit response message to source AGW, and notification source AGWAGW Correspondent Node has upgraded;

Terminal attaching ILR also can perform step immediately 511 after step 509, needn't waiting step 510 complete, now the implication of step 511 is that ILR is to receiving the confirmation of source AGW message.After ILR execution of step 510, send renewal Correspondent Node can to again source AGW and complete message.

Step 512, source AGW or target AGW discharge data channel between the two, and source AGW discharges the user's context of preservation, the terminal that may exist and the link information of Correspondent Node simultaneously, the AID-RID map information of all Correspondent Nodes of this terminal;

Each Correspondent Node to this terminal, if this Correspondent Node is not communicated by letter with the other-end of access source AGW, source AGW also deletes the AID-RID map information of this Correspondent Node, otherwise continues to retain the AID-RID map information of this Correspondent Node.

This step can be in the rear startup of step 508, also can receive ILR complete the notice of upgrading Correspondent Node after (as step 511) start, in order better to guarantee the continuity of data, also can trigger by timer, as timer is set after step 508 or step 511, after timer expiry, initiate again the release in tunnel.

Step 513, the tunnel between source AGW release and source ILCR;

Step 514, target AGW initiates context report flow process to target BS, and new AGW is issued to target BS, and this step can be carried out after step 508;

In the present embodiment, after the tunnel between target AGW and target ILCR is set up, uplink data messages forwards from this tunnel, as D504, D506.Optionally, now uplink data messages also can forward from the tunnel between target AGW and source AGW, and data message is forwarded to source AGW from target AGW, then to source ILCR.

In the present embodiment, source AGW just triggers ILR in step 509 and upgrades Correspondent Node flow process, optionally, step 509 also can advance to step 503 carries out simultaneously, in this case, terminal attaching ILR receives after the Correspondent Node information transmission request of source AGW, does not start the more new technological process of Correspondent Node, after receiving RID registration, restarts.

In each embodiment, during target AGW select target ILCR, can take following manner:

The aaa server of mode one, target AGW and terminal attaching is mutual, obtain the information of the ILCR that this target AGW can connect, and therefrom select an ILCR as target ILCR, as indicated to select according to local policy or terminal, can select with reference to AGW the mode of HA.Under roaming condition, this need to forward by visit aaa server alternately, and visit aaa server can be by the ILCR information notification target AGW that allows target AGW to connect in repeating process.

When mode two, terminal initial network, the aaa server of terminal attaching, visit aaa server allow the ILCR of access to notify this terminal to source AGW, when carrying out above-mentioned switching, by source AGW, in step 503, this information is notified to target AGW, target AGW therefrom selects an ILCR as target ILCR according to configuration, certainly also may only have one.

Mode three, target AGW are according to the configuration information of self (ILCR as attachable in AGW, network topology) select target ILCR.

The said Correspondent Node information of the present invention at least comprises the link information of terminal and Correspondent Node, the map information that can also comprise Correspondent Node, the correspondence relationship information that wherein link information of terminal and Correspondent Node comprises this terminal AID and all Correspondent Node AID, this correspondence relationship information is obtained from the upstream or downstream data message of the terminal of reception by maintain communications opposite end information network element (AGW or ILCR).

Each embodiment, maintain communications is to the target side network element of client information (as target AGW, the target ILCR) map information of obtaining communication opposite end in the following manner

1, from receiving the downlink data message that sends to terminal, obtain the map information of the Correspondent Node in message, or

2, target side network element according to the AID of Correspondent Node in data message at the AID-RID of local search Correspondent Node map information, wherein, other terminal of communicating by letter with Correspondent Node accessing by target side network element, may preserve in this locality the AID-RID map information of Correspondent Node; Or

3, as target side network element, in this locality, do not find the AID-RID map information of Correspondent Node, from Correspondent Node ownership place ILR, inquire the AID-RID map information of Correspondent Node and be kept at this locality; Or

If 4 target side network elements are not found the AID-RID map information of Correspondent Node in this locality, from the inquiry of source network element, obtain the AID-RID map information of Correspondent Node and be kept at this locality.

As shown in figure 16, the method that responsible maintain communications reported, upgraded Correspondent Node information to the AGW of client information (source AGW or target AGW) to ILR in the switching flow of system one is:

Step 1601, after terminal access AGW, sets up and communicates by letter with Correspondent Node, and after this, terminal up-downgoing data message path is as shown in D1601, D1602;

D1601, downlink data message path: the ILCR of homonymy receives that Correspondent Node issues after the data message of terminal, is transmitted to AGW, and AGW peels off the RID encapsulating in this data message, revert to after the form of the data message that Correspondent Node sends, by mailing to this terminal with terminal data passage.

D1602, uplink data messages path: terminal sends upstream data literary composition to base station, base station to AGW, then is forwarded to broad sense Forwarding plane through homonymy ILCR and/or mapping forward plane by data message forwarding, then through broad sense Forwarding plane, sends to the gateway of opposite end access.

Step 1602,1603, for the AGW of this Terminal Service is in transceiving data process, find new Correspondent Node, as according to the real-time testing mechanism of stream, preserve terminal and the link information (being the AID map information of terminal and Correspondent Node) of Correspondent Node and the AID-RID map information of Correspondent Node;

Step 1604, AGW sends Correspondent Node information notification request message to terminal attaching ILR, the link information of carried terminal and Correspondent Node, the while can also be carried the AID-RID map information of Correspondent Node;

AGW can report the information of Correspondent Node in real time according to set strategy to terminal attaching ILR, once changing, notify; Or AGW also can be in batches report the information of Correspondent Node to ownership ILR, for example, at set intervals or when the number of Correspondent Node reaches predetermined quantity, to the information that belongs to ILR and report Correspondent Node.

Step 1605, the terminal that ownership ILR preservation is received and link information and/or the AID-RID map information of Correspondent Node;

Step 1606, ownership ILR returns to response to AGW;

Receive after the success response returned of ownership ILR, AGW can be according to the information of setting policy selection and staying or delete in the Correspondent Node table relaying continuation of insurance of terminal the Correspondent Node having reported.And if set strategy is the mode that adopts real-time report, in AGW without preserving again Correspondent Node table, thereby greatly solved in AGW the excessive and problem of committed memory and handling property of Correspondent Node table.

When the AID-RID mapping relations of a certain Correspondent Node of terminal change (as switching), AGW is after receiving the notice of Correspondent Node ownership ILR, upgrade the local Correspondent Node AID-RID map information of preserving, if Correspondent Node AID-RID map information is reported to ownership ILR in step 1604, now also needs to notify this terminal attaching ILR to upgrade the AID-RID map information of this Correspondent Node.After the correspondence disconnection or a certain Correspondent Node off-line of terminal and a certain Correspondent Node, IAD notification terminal ownership place ILR deletes the map information of related communication opposite end.

In each embodiment, the method that terminal attaching ILR upgrades Correspondent Node is:

A, terminal attaching identity location register (ILR), after receiving the triggering message of upgrading Correspondent Node, start to upgrade the flow process of Correspondent Node, according to terminal and Correspondent Node link information, find all Correspondent Nodes of terminal that need renewal;

(1), when AGW or ILCR adopt real-time mode to report Correspondent Node information to terminal attaching ILR, the triggering message of upgrading Correspondent Node is the RID login request message that target AGW or target ILCR send;

In all embodiment of the present invention, when AGW or ILCR adopt the mode of real-time report Correspondent Node information, in handoff procedure, terminal attaching ILR can not need the triggering of source grappling access IAD or source ILCR, be that AGWHuo source, source ILCR need not send the transmission of Correspondent Node information and asks triggering terminal ownership ILR to upgrade the process of Correspondent Node, now terminal attaching ILR, after the RID registration of receiving target grappling IAD or target ILCR, directly starts the Correspondent Node process of upgrading.

(2), when AGW or ILCR adopt non real-time mode to report Correspondent Node information to terminal attaching ILR, the triggering message of upgrading Correspondent Node is the rear transmission request of Correspondent Node information or the RID registration request arriving;

In all embodiment of the present invention, when AGW or ILCR adopt non real-time mode, for example, at set intervals or when the number of Correspondent Node reaches predetermined quantity, to ownership ILR, report the information of Correspondent Node.Target AGW or target ILCR need to report the local Correspondent Node information of preserving to terminal attaching ILR when carrying out RID registration simultaneously.Terminal attaching ILR receives the Correspondent Node information transmission request that AGWHuo source, source ILCR sends or receives target AGW or during RID registration request that target ILCR sends, more new technological process of initiating communication opposite end is triggered.

The idiographic flow of each embodiment all take AGW or ILCR while adopting non real-time mode to report Correspondent Node information to terminal attaching ILR as example describes.

In all embodiment of the present invention, terminal attaching ILR completes after Correspondent Node renewal, optional, sends to target AGW or target ILCR and upgrade message, and target AGW or target ILCR can arrange at this moment timer and wait for release forwarding tunnel.

The Correspondent Node that terminal attaching ILR can be only more obtains before new terminal RID register flow path, the new Correspondent Node obtaining after RID register flow path does not need to upgrade.Or simple process is for upgrading all Correspondent Nodes.

If B exists Correspondent Node AID-RID map information, then according to Correspondent Node AID-RID map information, determine the gateway (as can be according to configuration querying, or DNS inquiry etc.) of Correspondent Node access; If there is not Correspondent Node AID-RID map information, can be according to local configuration information (as the corresponding relation of configuration communication opposite end AID and IAD in ILR) or DNS inquiry etc., determine the gateway of Correspondent Node access, gateway to the access of described Correspondent Node sends RID update notification, carries the map information of this terminal AID and new RID;

The gateway of C, Correspondent Node access is received after update notification, upgrades the terminal AID-RID map information of local cache, completes after renewal, and to terminal attaching, ILR returns to response message;

If there is terminal AID-RID map information in Correspondent Node ownership ILR, the gateway of Correspondent Node access or terminal attaching ILR also need to notify more new terminal AID-RID map information of Correspondent Node ownership ILR.

D, terminal attaching ILR complete after Correspondent Node upgrades and return success message the AGW to terminal access.

At terminal attaching ILR, complete Correspondent Node more before new technological process, the Correspondent Node link information of terminal, Correspondent Node AID-RID map information may have renewal, as receive the notice of upgrading Correspondent Node map information, increase new Correspondent Node etc.The gateway of now terminal access should be by Correspondent Node lastest imformation real-time report terminal attaching ground ILR.After ownership place ILR receives that this reports, upgrade the map information of the described Correspondent Node of preserving, as sent the more notice of new terminal map information to the original gateway accessing of this Correspondent Node, also need again to the new gateway accessing of this Correspondent Node, to send the more notice of new terminal map information.

Embodiment bis-

The network architecture of the WiMAX system of the application identity of the present embodiment based on system one sign and position isolation technics, in realizing the flow process of switching without fixed anchor point, use the forwarding tunnel between ILCR to carry out data retransmission, and by target ILCR, initiate the scene that the forwarding tunnel between ILCR is set up, concrete steps are as follows:

Step 601,602, with step 501,502;

D601, D602, same D501, D502.

In data message process of transmitting, source AGW reports, upgrades Correspondent Node information to terminal attaching ILR, and the optional Correspondent Node information of safeguarding, upgrading local preservation.

Step 603, source AGW receives after target access gateway grappling DPF handoff trigger message, or source AGW is while determining to initiate AGW reorientation, source AGW sends grappling DPF handover request message to target AGW, needs to carry the identification information of source ILCR in message;

Wherein identification information can be address, can be also specific identity.After this, terminal up-downgoing data message path is still as shown in D601, D602.Just now by target AGW, to terminal attaching ILR, report, upgrade Correspondent Node information, and the optional Correspondent Node information of safeguarding, upgrading local preservation.

Step 604, with step 504;

Step 605, target AGW select target ILCR, initiates tunnel Establishing process to target ILCR, source ILCR identification information is notified to target ILCR simultaneously;

In tunnel establishment procedure, target ILCR may need to complete alternately authentication with ownership aaa server.

Wherein can there be various ways in the tunnel between IAD and ILCR, and as L2TPv3, IP-in-IP, MPLS (LDP-based and RSVP-TE based), GRE, MIP and IPsec etc., the present invention is not limited to any specific tunnel style.When adopting MIP, the establishment in tunnel, maintenance are identical with existing WiMAX network.

Step 606, target ILCR, according to the identification information of the source ILCR obtaining in step 605, initiates the Establishing process of forwarding tunnel to source ILCR;

If target ILCR is identical with source ILCR, otherwise do not carry out this step.

Wherein can there be various ways in the tunnel between ILCR, and as L2TPv3, IP-in-IP, MPLS (LDP-based and RSVP-TE based), GRE, MIP and IPsec etc., the present invention is not limited to any specific tunnel style.After this, terminal up-downgoing data message path is as shown in D603, D604.

D603, downlink data message path.Source ILCR receives that Correspondent Node issues after terminal data message, by forwarding tunnel, be transmitted to target ILCR, target ILCR is transmitted to target AGW again, target AGW peels off the RID encapsulating in this data message, revert to after the form of the data message that Correspondent Node sends, target access gateway by this message by mailing to this terminal with terminal data passage.

D604, same D504.

If step 606 and step 605 executed in parallel, be to set up the tunnel between ILCR in the tunneling process of target ILCR between foundation and target AGW simultaneously, step 606 may complete before step 605, now downlink data message need to be on target ILCR first buffer memory, after step 605 completes, be handed down to again target AGW.And the same D602 in uplink data messages path now is just now encapsulated and decapsulation data message by target AGW.In data message process of transmitting, target AGW reports, upgrades Correspondent Node information to terminal attaching ILR, and the optional Correspondent Node information of safeguarding, upgrading local preservation.

Step 607 is to step 608, with step 506 to step 507;

After this, terminal up-downgoing data message path as shown in D605, D606, D605, D606, same D505, D506.

Now, may also can there is the data message being forwarded by source ILCR, this be due to also fail to give notice Correspondent Node access gateway not more new terminal AID-RID map information cause, the same D603 in downlink data message path at this moment.

Step 609 is to step 614, with step 508 to step 513;

Step 615, source ILCR or target ILCR initiate the release of data forwarding tunnel between the two;

If target ILCR is not identical with source ILCR, carry out this step.

Step 616, with step 514;

In the present embodiment, after the tunnel between target AGW and target ILCR is set up, uplink data messages forwards from this tunnel, as D604, D606.Optionally, now uplink data messages also can forward from the tunnel between target AGW and source AGW, and data message is forwarded to source AGW from target AGW, then to source ILCR; Or forward from the forwarding tunnel between target ILCR and source ILCR.

In the present embodiment, source AGW just triggers ILR in step 610 and upgrades Correspondent Node flow process, optionally, step 610 also can advance to step 603 carries out simultaneously, in this case, terminal attaching ILR receives after the Correspondent Node information transmission request of source AGW, does not start the more new technological process of Correspondent Node, after receiving RID registration, restarts.

Embodiment tri-

Fig. 7 is applicable to the forwarding of data in handoff procedure and uses the forwarding tunnel between ILCR, and initiates by source ILCR the scene that the forwarding tunnel between ILCR is set up, and its concrete steps are described below:

Step 701, with step 601;

After this, terminal up-downgoing data message path as shown in D701, D702, D701, D702, same D601, D602.

Step 702, when target AGW prepares to initiate AGW reorientation, select target ILCR, sends grappling DPF handoff trigger message to source AGW, and in message, carries target ILCR identification information;

Wherein identification information can be address, can be also specific identity.

Step 703, source AGW receives after target AGW grappling DPF handoff trigger message, and agree to carry out grappling DPF while switching, if go out the switching (as not identical with target ILCR in source ILCR) that need to carry out across ILCR according to the identification information judgment of target ILCR, to source ILCR, send ILCR handover request, carry target ILCR identification information simultaneously; Otherwise do not perform step 703 to 705;

Step 704, source ILCR, according to the identification information of the target ILCR obtaining in step 703, initiates the Establishing process of forwarding tunnel to target ILCR;

Wherein can there be various ways in the tunnel between ILCR, and as L2TPv3, IP-in-IP, MPLS (LDP-based and RSVP-TE based), GRE, MIP and IPsec etc., the present invention is not limited to any specific tunnel style.

Step 705, source ILCR responds ILCR handoff response to source AGW;

After this, terminal up-downgoing data message path is as shown in D703, D704:

D703, downlink data message path: source ILCR receives that Correspondent Node issues after terminal data message, is transmitted to target ILCR by forwarding tunnel, now downlink data message need to be on target ILCR first buffer memory.

D704, same D702.Just now by target AGW, data message is encapsulated and decapsulation.

Step 706 is to step 708, with step 503 to 505;

After this, terminal up-downgoing data message path is as shown in D705, D706.

D705, same D603.The downlink data message being buffered in D703 on target ILCR now also needs to be transmitted to target AGW.

D706, same D604.

Subsequent step 709 is to step 718, with step 607 to step 616;

Follow-up data message path D707, the same D605 of D708, D606.

In above-mentioned flow process, step 703 to step 705 can be carried out after step 708 again.

In the present embodiment, after the tunnel between target AGW and target ILCR is set up, uplink data messages forwards from this tunnel, as D706, D708.Optionally, now uplink data messages also can forward from the tunnel between target AGW and source AGW, and data message is forwarded to source AGW from target AGW, then to source ILCR; Or forward from the forwarding tunnel between target ILCR and source ILCR.

In the present embodiment, source AGW just triggers ILR in step 712 and upgrades Correspondent Node flow process, optionally, step 712 also can advance to step 706 carries out simultaneously, in this case, terminal attaching ILR receives after the Correspondent Node information transmission request of source AGW, does not start the more new technological process of Correspondent Node, after receiving RID registration, restarts.

In switching flow in system one, AGW changes, not necessarily can cause the variation of ILCR, therefore source AGW need to be according to target ILCR identification information, or target AGW need to, according to source ILCR identification information, judge whether to occur the variation of ILCR, when ILCR does not change,, now there is not the tunnel between source ILCR and target ILCR in source ILCR and target ILCR unification, does not need to set up, delete tunnel between the two.

System two

The Wimax network architecture that native system is applied above-mentioned identify label and position isolation technics still, as shown in Fig. 4 a, comprises access business network (W-ASN) and is connected business network (W-CSN), and the functional module that W-NSP and W-CSN comprise is also identical.Connect in business network and also comprise identity position core router (ILCR), each ILCR and supporting by thering is data-interface between the broad sense Forwarding plane of RID route and forwarding data packets, but AGW in W-CSN and ILCR in W-NSP are to realize identify label relevant function separated with position different with embodiment mono-.

In native system: identity position core router (ILCR) is used to terminal distribution RID, RID to ILR registration and unregistration terminal, RID to ILR query communication opposite end, maintenance terminal and Correspondent Node AID-RID map information and report, upgrade Correspondent Node AID-RID map information to terminal attaching ILR, data message is carried out to RID encapsulation and decapsulation, and the route and the forwarding that according to RID, realize data message.AGW or ILCR safeguard and be not updated to the terminal of ILR and the link information of Correspondent Node, to terminal attaching ILR report, the link information of new terminal and Correspondent Node more, and to ILR register, deletion AID-RID map information.

ILR, be arranged in W-CSN, for receiving the registration and unregistration request of described AGW to this ILR home subscriber terminal, safeguard the AID-RID map information of home subscriber terminal, and the inquiry request of reception to terminal RID, RID corresponding to this terminal AID in request returned to inquiry request side, and receive that the gateway accessing to all Correspondent Nodes of this terminal after the triggering of upgrading Correspondent Node sends RID update notification.

With switch relatively, (corresponding embodiment tetra-to ten if no special instructions)

Described ILR, for registering, the RID of cancellation, inquiry terminal, and receives that the gateway to all Correspondent Nodes accesses of this terminal sends RID update notification after the triggering message of upgrading Correspondent Node.

Particularly,

Described AGW comprises:

Cut out control module, for sending AGW handover request to target AGW, after having switched, be released to the resource that cuts out terminal distribution;

Incision control module, for after receiving AGW handover request, select target ILCR, when target ILCR is different from source ILCR, notification target ILCR has terminal to cut and carry the AID of incision terminal, and and this target ILCR between set up this tunnel while not setting up the tunnel of this incision terminal data message repeating, also for sending AGW handoff response to this source AGW;

In described AGW to cut out the AGW handover request that control module sends to target AGW be grappling datapath function (DPF) handover request; The AGW handoff response that incision control module in described AGW sends to source AGW is grappling DPF handoff response.

Packet forwarding module, for carrying out forward process to cutting, cut out the data message of terminal.

Described ILCR comprises:

Cut out control module, after cutting out for terminal, be released to the resource of this terminal distribution;

Incision control module, for after receiving the notice of terminal incision, sends and distributes the AID that notifies and carry incision terminal to RID distribution module;

RID distribution module, for point to the new RID of this ILCR for this terminal distribution after receiving distribution notice, preserves the map information of this terminal AID and this new RID;

Packet forwarding module, for carrying out forward process to cutting, cut out the data message of terminal;

Described AGW or ILCR also comprise:

RID Registering modules, for initiate RID register flow path after the registration notification of incision control module of receiving AGW or ILCR, sends registration request and carries the AID of this incision terminal and new RID to incision terminal attaching identity location register (ILR);

Link information maintenance module, for report, upgrade this terminal and Correspondent Node link information to terminal attaching ILR, and maintenance is not updated to the terminal of terminal attaching ILR and the link information of Correspondent Node;

The packet forwarding module of AGW or ILCR, parses the link information of terminal and Correspondent Node for the data message of the terminal from receiving, and notifies this link information maintenance module to safeguard;

Described ILR comprises:

Location registration process module, for after receiving the registration request of ILCR or AGW, the AID of register update terminal and the correspondence relationship information of RID;

RID update module, for trigger message according to the renewal Correspondent Node of receiving, initiate more new technological process of RID, gateway to all Correspondent Node accesses of this terminal sends RID update notification, carry the AID of this terminal and new RID, particularly, RID update module is being initiated RID more during new technological process, according to the map information of Correspondent Node AID-RID, local configuration information or DNS inquiry, determine the gateway of described Correspondent Node access, gateway to the access of described Correspondent Node sends RID update notification, carries the map information of this terminal AID and new RID.

Further,

The link information maintenance module of this AGW or ILCR reports, upgrades the link information of this terminal and Correspondent Node in real time to terminal attaching ILR; The RID update module that triggers this ILR initiate RID more the renewal Correspondent Node of new technological process trigger the RID registration request that message refers to that AGW sends.

Further,

The link information maintenance module timing of this AGW or ILCR or the quantitative link information that reports, upgrades this terminal and Correspondent Node to terminal attaching ILR;

This AGW or ILCR cut out control module, also for send Correspondent Node information transmission request to terminal attaching ILR, wherein carry this link information maintenance module and be not also updated to the terminal of terminal attaching ILR and the link information of Correspondent Node, and notify this link information maintenance module to stop cutting out the maintenance of the link information of terminal;

Further, (corresponding embodiment tetra-, five, six, seven)

Link information maintenance module is in ILCR time, the control module that cuts out of ILCR sends Correspondent Node information transmission request to terminal attaching ILR after the switching notice of receiving source AGW or this object ILCR, and wherein this source AGW sends this switching notice to this source ILCR after receiving the handoff response that this object AGW sends; This object ILCR sends this switching notice setting up Hou Xianggai source, tunnel ILCR with this object AGW;

Described ILCR also comprises map information maintenance module, for report, upgrade the AID-RID map information of the Correspondent Node of this terminal to terminal attaching ILR, and the AID-RID map information of safeguarding the Correspondent Node of this terminal that is not updated to terminal attaching ILR;

The control module that cuts out of ILCR sends and in Correspondent Node information transmission request, also to carry this map information maintenance module and be not also updated to the map information of the Correspondent Node of terminal attaching ILR to terminal attaching ILR, and notifies this map information maintenance module to stop cutting out the maintenance of the map information of terminal communication opposite end;

In the RID registration request that described RID Registering modules sends, also carry the map information that this map information maintenance module is not also updated to the Correspondent Node of terminal attaching ILR.

Further, (corresponding embodiment eight, nine, ten)

Link information maintenance module is in AGW time, and the control module that cuts out of AGW sends Correspondent Node information transmission request to terminal attaching ILR after receiving the handoff response that target AGW sends;

AGW cuts out control module, to terminal attaching ILR, sends after Correspondent Node information transmission request, to source ILCR, sends switching notice;

ILCR cuts out control module, receive after the switching notice of source AGW transmission, to terminal attaching ILR, send Correspondent Node information transmission request, wherein carry this map information maintenance module and be not also updated to the map information of the Correspondent Node of terminal attaching ILR, and notify this map information maintenance module to stop cutting out the maintenance of the map information of terminal communication opposite end;

Further,

The map information maintenance module of described ILCR is obtaining communication opposite end AID-RID map information in the following manner:

Further,

Described AGW also comprises that tunnel sets up module; The incision control module of described AGW, after select target ILCR, is also set up module and is sent tunnel foundation notice to this tunnel; Module is set up for after receiving tunnel foundation notice in described tunnel, by tunnel Establishing process, is the dynamic tunnel between the foundation of incision terminal and this target ILCR; Or

Described AGW also comprises that tunnel sets up module, described tunnel set up module for after powering on, set up and ILCR between static tunnel; Target ILCR knows according to the notice of target AGW or by inspection data message the AID that has terminal to switch and obtain this terminal.

Further, and (mapping mode of corresponding embodiment tetra-, eight, without setting up downlink dedicated forwarding tunnel)

Described RID Registering modules is arranged in ILCR, and the incision control module of described ILCR receives that after the RID that incision terminal that RID distribution module returns is new, ILR sends RID registration request to this incision terminal attaching;

In handoff procedure, the packet forwarding module in described ILCR is transmitted to source AGW after issuing of receiving being cut out to the data message solution RID encapsulation of terminal; To after the data message solution RID encapsulation of issuing incision terminal of receiving, be transmitted to target AGW;

Packet forwarding module in described AGW receives and issues after the data message that cuts out terminal, by and target AGW between forwarding tunnel be forwarded to this target AGW; Receive issue incision terminal data message after, by and this incision terminal between data channel send to this incision terminal.

Further, (target AGW and target ILCR set up and down forward tunnel, and source ILCR stops decapsulation according to notice, corresponding embodiment tetra-, five, eight conversion)

Module is set up after the tunnel foundation notice of receiving for incision terminal in tunnel in described AGW, and between this target ILCR, in order to cut, terminal is set up or selection the first tunnel and the second tunnel;

Packet forwarding module in described ILCR is received and is issued after the data message that cuts out terminal, this data message separated to RID and encapsulate and be transmitted to source AGW; Receive the incision terminal of sending from the first tunnel or broad sense Forwarding plane is not also separated the data message of RID encapsulation and separate RID encapsulation, by the second tunnel, be transmitted to target AGW;

Packet forwarding module in described AGW is forwarded to this target AGW after receiving and issuing the data message that cuts out terminal; The source AGW of receiving issues after the data message of incision terminal, by described the first tunnel, is forwarded to target ILCR; Receive target ILCR issue incision terminal data message after, by and this incision terminal between data channel send to this incision terminal;

The control module that cuts out in described ILCR is received after the switching notice of target ILCR or source AGW transmission, notifies the packet forwarding module in described ILCR to stop carrying out decapsulation to cutting out the data message of terminal.

Further, (target AGW and target ILCR set up and down forward tunnel, carry out decapsulation by source ILCR always, corresponding embodiment tetra-, five, eight conversion)

Packet forwarding module in described ILCR is received and is issued after the data message that cuts out terminal, this data message separated to RID and encapsulate and be transmitted to source AGW; Receiving the data message of the incision terminal of sending from the first tunnel, by the second tunnel, be transmitted to target AGW; Receiving the data message of the incision terminal of sending from broad sense Forwarding plane, separate RID encapsulation, by the second tunnel, be transmitted to target AGW;

Packet forwarding module in described AGW is forwarded to this target AGW after receiving and issuing the data message that cuts out terminal; The source AGW of receiving issues after the data message of incision terminal, by described the first tunnel, is forwarded to target ILCR; Receive target ILCR issue incision terminal data message after, by and this incision terminal between data channel send to this incision terminal.

Further, (corresponding embodiment six, seven, nine, ten)

Before the forwarding tunnel of packet forwarding module in described ILCR between source, target ILCR set up, after the data message of issuing this terminal of receiving is separated to RID encapsulation, be transmitted to again source AGW, after described forwarding tunnel is set up, the data message of issuing this terminal of receiving be directly forwarded to this target ILCR by this forwarding tunnel; Forwarding tunnel between source, target ILCR is directly transmitted to this target AGW by the data message of issuing incision terminal of receiving before setting up; After forwarding tunnel between source, target ILCR is set up, by the data message of issuing incision terminal of receiving separate forward again after RID encapsulation or buffer memory after be transmitted to again this target AGW;

Packet forwarding module in described AGW is forwarded to this target AGW after receiving and issuing the data message that cuts out terminal; Receive source AGW or target ILCR issue incision terminal data message after, by and this incision terminal between data channel send to this incision terminal.

Further,

Incision control module in described AGW is also for sending to source AGW by the identification information of target ILCR; The control module that cuts out in described AGW also sends to source ILCR for the identification information of the target ILCR different from source ILCR that target AGW is sent; It is the forwarding tunnel cutting out between terminal foundation and target ILCR according to the identification information of target ILCR that module is set up in tunnel in described ILCR; Or

In described AGW, cut out control module also for the identification information of source ILCR is sent to target AGW; Incision control module in described AGW also sends to target ILCR for the identification information of the source ILCR that is different from target ILCR that source AGW is sent; It is the forwarding tunnel between the foundation of incision terminal and source ILCR according to the identification information of source ILCR that module is set up in tunnel in described ILCR.

Further,

The data message forwarding that packet forwarding module in described AGW sends the incision terminal of receiving is to source AGW; The data message forwarding that cuts out terminal transmission that target AGW is sent is to source ILCR; And the data message that cuts out terminal transmission that the packet forwarding module in described ILCR is sent source AGW carries out RID encapsulation and is forwarded to broad sense Forwarding plane; Or

The data message that packet forwarding module in described AGW sends the incision terminal of receiving, as also do not set up the tunnel of this incision terminal data message repeating between this AGW and target ILCR, is transmitted to source AGW, otherwise is forwarded to target ILCR; The data message that cuts out terminal transmission that target AGW is sent, is transmitted to source ILCR; And the data message that the data message that cuts out terminal transmission that the packet forwarding module in described ILCR is sent source AGW and the incision terminal that target AGW is sent send, carries out being forwarded to broad sense Forwarding plane after RID encapsulation.

Further,

The mode of incision control module select target ILCR in described AGW is a kind of in following mode:

Further,

Described RID Registering modules is arranged in ILCR; Incision control module in described ILCR sends and distributes after the new RID that notifies and be retrieved as incision terminal distribution to RID distribution module, to RID Registering modules, sends registration notification and carries the AID of this incision terminal and new RID; Or

Described RID Registering modules is arranged in AGW; Incision control module in described ILCR sends and distributes after the new RID that notifies and be retrieved as incision terminal distribution to RID distribution module, and this new RID is sent to target AGW; Incision control module in described AGW is received after the new RID for incision terminal distribution of target ILCR transmission, to RID Registering modules, is sent registration notification and carry the AID of this incision terminal and new RID.

Following examples four to embodiment ten are application identity of the present invention signs with the WiMAX network system two of position isolation technics in switching flow figure.

Embodiment tetra-

The scene of the forwarding tunnel between IAD is used in the forwarding that Fig. 8 is applicable to data in handoff procedure, and its concrete steps are described below:

Step 801, with step 501;

D801, downlink data message path: source ILCR receives that Correspondent Node issues terminal data message, peel off the RID encapsulating in this data message, revert to after the form of the data message that Correspondent Node sends, be transmitted to source AGW, source AGW by the data channel between source AGW and target AGW by data message forwarding to target AGW, target access gateway by this message by mailing to this terminal with terminal data passage.

D802, uplink data messages path: terminal sends upstream data literary composition to target BS, target BS by data message forwarding to target AGW, target AGW by the data channel between source AGW and target AGW by data message forwarding to source AGW, source AGW is transmitted to source ILCR again, the AID of ILCR obtaining communication opposite end, source, and inquire about the AID-RID map information in local cache, as find the RID of Correspondent Node, using the RID of this Correspondent Node as destination address, the RID of this terminal is as source address, be encapsulated in this data message, then by encapsulation after data message forwarding to broad sense Forwarding plane, as do not found the RID of Correspondent Node, after being done to tunnel encapsulation, data message is forwarded to mapping forward plane, and to the RID of ILR query communication opposite end.Or data message is cached to this locality, after obtaining the RID of Correspondent Node, then using the RID of this Correspondent Node as destination address, the RID of this terminal is as source address, be encapsulated in this data message, then by encapsulation after data message forwarding to broad sense Forwarding plane.

In data message process of transmitting, source ILCR reports, upgrades Correspondent Node information to terminal attaching ILR, and the optional Correspondent Node information of safeguarding, upgrading local preservation.

Step 802, when target AGW prepares to initiate AGW reorientation, sends grappling DPF handoff trigger message to source AGW, and this step is optional,

Step 803, source AGW receives after target access gateway grappling DPF handoff trigger message, and agrees to carry out grappling DPF while switching, source AGW sends grappling DPF handover request message to target AGW;

Step 804, target AGW select target ILCR, initiates forwarding tunnel Establishing process to target ILCR, set up and target ILCR between for forwarding the private downlink forwarding tunnel from this terminal downlink data message of source ILCR, carry the AID of this terminal;

The data of setting up dedicated tunnel and being for target ILCR can be distinguished from target AGW are that upstream data or the target AGW that terminal sends forwards the downlink data that source AGW comes.In addition, if step 802 is not carried out, target AGW need to be at the first select target ILCR of this step.

Wherein can there be various ways in the tunnel between IAD and ILCR, and as L2TPv3, IP-in-IP, MPLS (LDP-based and RSVP-TE based), GRE, MIP and IPsec etc., the present invention is not limited to any specific tunnel style.

Step 805, target AGW initiates tunnel Establishing process to target ILCR;

Step 805a, target ILCR is the RID that this terminal distribution is new, and in this locality, preserves and upgrade this terminal AID-RID map information;

After this, terminal up-downgoing data message path is as shown in D803, D804.

D803, downlink data message path: source ILCR receives that Correspondent Node issues after the data message of terminal, peel off the RID encapsulating in this data message, revert to the form of the data message of Correspondent Node transmission, be transmitted to source AGW, source AGW by the data channel between source AGW and target AGW by data message forwarding to target AGW, target AGW issues target ILCR by private downlink forwarding tunnel again, target ILCR is transmitted to target AGW by data by the tunnel between target AGW and target ILCR, target AGW again by this message by mailing to this terminal with terminal data passage.

D804, uplink data messages path: terminal sends upstream data literary composition to target BS, target BS by data message forwarding to target AGW, target AGW is transmitted to target ILCR again, the AID of target ILCR obtaining communication opposite end, and inquire about the AID-RID map information in local cache, as find the RID of Correspondent Node, using the RID of this Correspondent Node as destination address, the RID of this terminal is as source address, be encapsulated in this data message, then by encapsulation after data message forwarding to broad sense Forwarding plane; As do not found the RID of Correspondent Node, after being done to tunnel encapsulation, data message is forwarded to mapping forward plane, and to the RID of ILR query communication opposite end.Or data message is cached to this locality, after obtaining the RID of Correspondent Node, then using the RID of this Correspondent Node as destination address, the RID of this terminal is as source address, be encapsulated in this data message, then by encapsulation after data message forwarding to broad sense Forwarding plane.

In data message process of transmitting, target ILCR and/or source ILCR report, upgrade Correspondent Node information to terminal attaching ILR, and the optional Correspondent Node information of safeguarding, upgrading local preservation.May exist for same Correspondent Node, source ILCR has upgraded ILR, and target ILCR upgrades ILR once more, now, ILR covers original data or does not process, and occurs this situation in system two in other embodiment, also do same processing, follow-up no longer detailed description.

Step 806, target ILCR, after distributing new RID, initiates RID register flow path to terminal attaching ILR, by newly assigned RID, brings ILR, upgrades the upper terminal AID-RID map information of ILR;

If also have the not information of reporting terminal ownership ILR in local Correspondent Node information of preserving, the information not reporting is carried to reporting terminal ownership ILR in message, this ILR preserves the information of the Correspondent Node of receiving.If preserved Correspondent Node AID-RID map information in terminal attaching ILR, the Correspondent Node information that target ILCR reports terminal attaching ILR in this step comprises the link information of terminal and Correspondent Node, Correspondent Node AID-RID map information; Otherwise, only need the link information of reporting terminal and Correspondent Node.

Step 807, ownership ILR receives after the RID registration request of target ILCR, verifies the legitimacy of AID, and preserves the map information of the current AID-RID of terminal;

This step can be carried out by ILCR in step 805 in ownership aaa authentication flow process.After this, terminal up-downgoing data message path is as shown in D805, D806.

D805, downlink data message path: target ILCR receives that Correspondent Node issues after terminal data message, peel off the RID encapsulating in this data message, after reverting to the form of the data message that Correspondent Node sends, be transmitted to target AGW, target AGW by this message by mailing to this terminal with terminal data passage.

D806, uplink data messages path.Same D804.

In data message process of transmitting, target ILCR reports, upgrades Correspondent Node information to terminal attaching ILR, and the optional Correspondent Node information of safeguarding, upgrading local preservation.

Now, may also can there is the data message being forwarded by source ILCR, this be due to also fail to give notice Correspondent Node access ILCR not more new terminal AID-RID map information cause, the same D803 in downlink data message path at this moment.

Step 808, target AGW sends grappling DPF handoff response to source AGW, completes the switching of AGW.

Step 809, AGWXiang source, source ILCR initiates switching notice, and notification source ILCR has switched, and trigger source ILCR notice ILR initiates to upgrade Correspondent Node flow process;

Step 810, source ILCR sends Correspondent Node information transmission request to terminal attaching ILR;

If also have the not information of reporting terminal ownership ILR in local Correspondent Node information of preserving, the information not reporting is carried to reporting terminal ownership ILR in message, this ILR preserves the information of the Correspondent Node of receiving.If preserved Correspondent Node AID-RID map information in terminal attaching ILR, the Correspondent Node information that source ILCR reports terminal attaching ILR in this step comprises the link information of terminal and Correspondent Node, Correspondent Node AID-RID map information; Otherwise, only need the link information of reporting terminal and Correspondent Node.

Step 811, the ILCR of terminal attaching ILR notice Correspondent Node access is new terminal AID-RID map information more;

Step 812, terminal attaching ILR completes after Correspondent Node renewal, responds Correspondent Node information transmit response message to source ILCR, and notification source ILCR Correspondent Node has upgraded;

Step 813, source ILCR responds switch acknowledgment message to source AGW;

Terminal attaching ILR also can perform step immediately 812 after step 810, needn't waiting step 811 complete, now the implication of step 812 is that ILR is to receiving the confirmation of source ILCR message.After ILR execution of step 811, send renewal Correspondent Node can to again source ILCR and complete message, source ILCR also can send message to subsequently source AGW again.

Step 815, source AGW discharges or target AGW discharges data channel between the two;

This step can be in the rear startup of step 808, also can receive ILR complete the notice of upgrading Correspondent Node after (as step 813) start, in order better to guarantee the continuity of data, also can trigger by timer, as timer is set after step 808 or step 813, after timer expiry, initiate again the release in tunnel.

Step 815, the tunnel between source AGW release and source ILCR;

Step 816, target AGW discharge and target ILCR between down forward tunnel;

Step 817, target AGW initiates context report flow process to target BS, and new AGW is issued to target BS;

This step can be carried out after step 808.

In the present embodiment, source ILCR does not know whether and has target ILCR, with and and target AGW between tunnel when successfully set up, therefore source ILCR issues the data message of terminal for the Correspondent Node of receiving, can carry out all the time RID decapsulation, now target ILCR is by no longer decapsulation, as D803.Optionally, now also can set up, use the forwarding tunnel between target AGW and target ILCR, directly use target AGW and the direct tunnel of source AGW to carry out data retransmission, as D801.Optionally, after the tunnel between target AGW and target ILCR is successfully established, target AGW can stop by source AGW notification source ILCR the decapsulation of downlink message, after this downlink data message path is: source ILCR receives that Correspondent Node issues after the data message of terminal, be transmitted to source AGW, source AGW by the data channel between source AGW and target AGW by data message forwarding to target AGW, target AGW issues target ILCR by private downlink forwarding tunnel again, target ILCR peels off the RID encapsulating in this data message, revert to after the form of the data message that Correspondent Node sends, data are transmitted to target AGW by the tunnel between target AGW and target ILCR, target AGW again by this message by mailing to this terminal with terminal data passage.

In the present embodiment, after the tunnel between target AGW and target ILCR is set up, uplink data messages forwards from this tunnel, as D804, D806.Optionally, now uplink data messages also can forward from the tunnel between target AGW and source AGW, and data message is forwarded to source AGW from target AGW, then to source ILCR.

In the present embodiment, source AGW initiates ILR at step 809 ability trigger source ILCR notice ILR and upgrades Correspondent Node flow process, optionally, step 809 also can advance to step 803 carries out simultaneously, in this case, terminal attaching ILR receives after the Correspondent Node information transmission request of source ILCR, does not start the more new technological process of Correspondent Node, after receiving RID registration, restarts.

In the present embodiment, the mode of the RID of target ILCR obtaining communication opposite end is substantially identical with the mode of AGW obtaining communication opposite end RID in system one, only executor need to be become to target ILCR, and in mode three, target ILCR obtains relevant information from source ILCR.Other embodiment of system two also can adopt same procedure to obtain the RID of Correspondent Node.

The method that ILCR in the switching flow of embodiment tetra-to embodiment seven (comprising source ILCR and target ILCR) reports, upgrades to ILR in the method and system one of Correspondent Node information is substantially identical, and difference is that executor is ILCR.Concrete difference following (only describe difference part herein, same section no longer describes in detail):

D1601, peels off by ILCR the RID encapsulating in this data message;

D1602, by the AID of ILCR obtaining communication opposite end, and carries out data message encapsulation;

Step 1602,1603, by being that the ILCR of this Terminal Service is in transceiving data process, find new Correspondent Node, as according to the real-time testing mechanism of stream, preserve terminal and the link information (being the corresponding relation of the AID of terminal AID and Correspondent Node) of Correspondent Node and the AID-RID map information of Correspondent Node.

Step 1604, sends Correspondent Node information notification request message by ILCR to terminal attaching ILR, carries relevant information;

Step 1606, ownership ILR responds to ILCR, is processed the relevant information of local cache by ILCR.

When the AID-RID mapping relations of a certain Correspondent Node of terminal change (as switching), ILCR is after receiving the notice of Correspondent Node ownership ILR, upgrade the local Correspondent Node AID-RID map information of preserving, if Correspondent Node AID-RID map information is reported to ownership ILR in step 1604, now also needs to notify this terminal attaching ILR to upgrade the AID-RID map information of this Correspondent Node.After the correspondence disconnection or a certain Correspondent Node off-line of terminal and a certain Correspondent Node, ILCR notification terminal ownership place ILR deletes the map information of related communication opposite end.

In the switching flow of embodiment tetra-to embodiment seven, the method in the method and system one of terminal attaching ILR renewal Correspondent Node is substantially identical, only the IAD in method need to be become to ILCR.

Embodiment five

Fig. 9 is applicable to the scene of the forwarding tunnel between data retransmission use IAD in handoff procedure, and its concrete steps are described below:

Step 901-902, with step 801-802;

D901, D902, same D801, D802.

Step 903, source AGW receives after target AGW grappling DPF handoff trigger message, and agrees to carry out grappling DPF while switching, source AGW sends grappling DPF handover request message to target AGW, needs to carry the identification information of source ILCR in message;

Step 904 with step 804, can bring target ILCR by the identification information of source ILCR in tunnel establishment procedure;

Step 905 with step 805, can bring target ILCR by the identification information of source ILCR in tunnel establishment procedure;

Step 906, target ILCR is according to the source ILCR identification information obtaining in step 904 or 905, if source ILCR is not identical with target ILCR, to source ILCR, initiate switching notice, notification source ILCR switches, trigger source ILCR notice ILR initiates to upgrade Correspondent Node flow process, otherwise does not carry out this step;

Step 907,908 is with step 810,812;

Step 909, source ILCR responds switch acknowledgment message to target ILCR;

After this, terminal up-downgoing data message path is as shown in D903, D904.

D903, downlink data message path is: source ILCR receives that Correspondent Node issues after the data message of terminal, be transmitted to source AGW, source AGW by the data channel between source AGW and target AGW by data message forwarding to target AGW, target AGW issues target ILCR by private downlink forwarding tunnel again, target ILCR peels off the RID encapsulating in this data message, revert to after the form of the data message that Correspondent Node sends, data are transmitted to target AGW by the tunnel between target AGW and target ILCR, target AGW again by this message by mailing to this terminal with terminal data passage.

The same D804 of D904.

Step 905a, step 910, step 911, step 912, step 913, step 914 be to 917, with step 805a, step 806, step 807, step 811, step 808, step 815 to 818.

The same D805 of D905, D906, D806.

Step 906 is to 909 also can be in the rear execution of step 910 in the present embodiment.

In the present embodiment, after the tunnel between target AGW and target ILCR is set up, uplink data messages forwards from this tunnel, as D904, D906.Optionally, now uplink data messages also can forward from the tunnel between target AGW and source AGW, and data message is forwarded to source AGW from target AGW, then to source ILCR.

Embodiment six

Figure 10 is applicable to the forwarding of data in handoff procedure and uses the forwarding tunnel between ILCR, and initiates by target ILCR the scene that between ILCR, forwarding tunnel is set up, and its concrete steps are described below:

Step 1001 is to 1003, with step 901 to 903;

D1001, D1002, same D901, D902.

Step 1004, with step 905;

Step 1005, target ILCR, according to the identification information of the source ILCR obtaining in step 1004, if target ILCR is not identical with source ILCR, initiates the Establishing process of forwarding tunnel to source ILCR;

Step 1004a, with step 905a;

Step 1006 is to step 1009, with step 906 to step 909;

After this, terminal up-downgoing data message path is as shown in D1003, D1004.

D1003, downlink data message path: source ILCR receives that Correspondent Node issues after terminal data message, by forwarding tunnel, be transmitted to target ILCR, target ILCR peels off the RID encapsulating in this data message, revert to after the form of the data message that Correspondent Node sends, be transmitted to again target AGW, target AGW by this message by mailing to this terminal with terminal data passage.

D1004, same D904.

If step 1005 and step 1004 executed in parallel, be to set up the tunnel between ILCR in the tunneling process of target ILCR between foundation and target AGW simultaneously, step 1005 may complete before step 1004, now downlink data message need to be on target ILCR first buffer memory, after step 1004 completes, be handed down to again target AGW.And the same D1002 in uplink data messages path now.

Step 1010 is to step 1014, step 1016, step 1017, with step 910 to step 914, step 915, step 917;

The same D905 of D1005, D1006, D906.

Step 1015, source ILCR or target ILCR initiate the release of data forwarding tunnel between the two;

Step 1006 is to 1009 also can be in the rear execution of step 1010 in the present embodiment.Or do not perform step 1006 to 1009, in step 1013 or 1003 rear execution steps 809 to step 813.

In the present embodiment, after the tunnel between target AGW and target ILCR is set up, uplink data messages forwards from this tunnel, as D1004, D1006.Optionally, now uplink data messages also can forward from the tunnel between target ILCR and source ILCR.

Embodiment seven

Figure 11 is applicable to data retransmission in handoff procedure and uses the forwarding tunnel between ILCR, and initiates by source ILCR the scene that between ILCR, forwarding tunnel is set up, and its concrete steps are described below:

Step 1101, with step 1001;

D1101, D1102, same D1001, D1002.

Step 1102, when target AGW prepares to initiate AGW reorientation, select target ILCR, sends grappling DPF handoff trigger message to source AGW, and in message, carries target ILCR identification information;

Step 1103 is to step 1105, with step 703 to 705;

If source AGW goes out to carry out the switching across ILCR according to the identification information judgment of target ILCR, to source ILCR, send ILCR handover request, carry target ILCR identification information simultaneously; Otherwise do not perform step 1103-1105.

After this, terminal up-downgoing data message path is as shown in D1103, D1104.

D1103, downlink data message path: source ILCR receives that Correspondent Node issues after terminal data message, peel off the RID encapsulating in this data message, revert to the form of the data message of Correspondent Node transmission, by forwarding tunnel, be transmitted to target ILCR, now downlink data message need to be on target ILCR first buffer memory.

D1104, same D1102.

Step 1106, source AGW sends grappling DPF handover request message to target AGW.

Step 1107, target AGW initiates tunnel Establishing process to target ILCR.In tunnel establishment procedure, target ILCR may need to complete alternately authentication with ownership aaa server.Wherein can there be various ways in the tunnel between IAD and ILCR, and as L2TPv3, IP-in-IP, MPLS (LDP-based and RSVP-TE based), GRE, MIP and IPsec etc., the present invention is not limited to any specific tunnel style.When adopting MIP, the establishment in tunnel, maintenance are identical with existing WiMAX network.

Step 1107a, with step 1004a;

After this, terminal up-downgoing data message path is as shown in D1105, D1106.

D1105, same D1003.The downlink data message being buffered in D1103 on target ILCR now also needs to be transmitted to target AGW.

D1106, same D1004.

Step 1108 is to step 1117, step 1119, with step 806 to step 815, step 817;

The same D805 of D1107, D1108, D806.

Step 1118, source ILCR or target ILCR initiate the release of data forwarding tunnel between the two;

In the present embodiment, step 1111 to step 1115 can be carried out with step 1106 simultaneously, and in this case, terminal attaching ILR receives after the Correspondent Node information transmission request of source ILCR, do not start the more new technological process of Correspondent Node, after receiving RID registration, restart.

In the present embodiment, also can not perform step 1111 to step 1115, but in step 1107 or 1108 rear execution steps 1006 to 1009.

In the present embodiment, after the tunnel between target AGW and target ILCR is set up, uplink data messages forwards from this tunnel, as D1106, D1108.Optionally, now uplink data messages also can forward from the tunnel between target ILCR and source ILCR.

Embodiment eight

The scene of the forwarding tunnel between IAD is used in the forwarding that Figure 12 is applicable to data in handoff procedure, and flow process and Fig. 8 are basic identical.Its concrete steps are described below:

Step 1201 is to step 1205, step 1205a, with step 801 to step 805, step 805a;

D1201, D1202, same D801, D802.

Step 1205b after step 1205a, need to bring target AGW by the newly assigned RID of target ILCR in tunnel Establishing process.

D1203, D1204, same D803, D804;

In data message process of transmitting, target AGW or source AGW can report, upgrade to terminal attaching ILR Correspondent Node information, and the optional Correspondent Node information of safeguarding, upgrading local preservation.May exist for same Correspondent Node, source AGW has upgraded ILR, and target AGW upgrades ILR once more, and now, ILR covers original data or do not process, and occurs this situation in system two in other embodiment, also does same processing, follow-up no longer detailed description.

Step 1206, target AGW, after receiving newly assigned RID, initiates RID register flow path to terminal attaching ILR, by newly assigned RID, brings ILR, upgrades the upper terminal AID-RID map information of ILR;

Optionally, this step also can be undertaken by target ILCR.

If also have the not information of reporting terminal ownership ILR in local Correspondent Node information of preserving, the information not reporting is carried to reporting terminal ownership ILR in message, this ILR preserves the information of the Correspondent Node of receiving.The Correspondent Node information that target AGW reports comprises the link information of terminal and Correspondent Node.

1207 to 1208, with step 807 to 808;

The same D805 of D1205, D1206, D808.

Step 1209, source AGW sends Correspondent Node information transmission request to terminal attaching ILR;

If also have the not information of reporting terminal ownership ILR in local Correspondent Node information of preserving, the information not reporting is carried to reporting terminal ownership ILR in message, this ILR preserves the information of the Correspondent Node of receiving.The Correspondent Node information that source AGW reports comprises the link information of terminal and Correspondent Node.

Step 1210, AGWGei source, source ILCR sends switching notice;

If preserved Correspondent Node AID-RID map information in terminal attaching ILR, source AGW needs trigger source ILCR to reporting this information of ILR.

Step 1211, source ILCR receives after the message of source AGW, to terminal attaching ILR, sends Correspondent Node information transmission request, carries the not Correspondent Node AID-RID map information of reporting terminal ownership ILR in message;

Step 1212, the ILCR that the method notice Correspondent Node that terminal attaching ILR is used ILR to upgrade Correspondent Node accesses is new terminal AID-RID map information more;

Step 1213-step 1214, terminal attaching ILR completes after Correspondent Node renewal, responds Correspondent Node information transmit response message to source ILCR, and source ILCR closes AGW again and responds switch acknowledgment message to source;

Step 1215, terminal attaching ILR completes after Correspondent Node renewal, responds Correspondent Node information transmit response message to source AGW;

Terminal attaching ILR also can perform step immediately 1215,1213 after step 1209,1211, needn't waiting step 1212 complete, now step 1213,1215 implication are that ILR is to receiving the confirmation of source ILCR, source AGW message.After ILR execution of step 1212, send renewal Correspondent Node can to again source ILCR, source AGW and complete message.

Step 1216 to step 1219 with step 814 to step 817.

In the present embodiment, source ILCR does not know whether and has target ILCR, with and and target AGW between tunnel when successfully set up, therefore source ILCR issues the data message of terminal for the Correspondent Node of receiving, can carry out all the time RID decapsulation, now target ILCR is by no longer decapsulation, as D1203.Optionally, now also can set up, use the forwarding tunnel between target AGW and target ILCR, directly use target AGW and the direct tunnel of source AGW to carry out data retransmission, as D1201.Optionally, after the tunnel between target AGW and target ILCR is successfully established, target AGW can stop by source AGW notification source ILCR the decapsulation of downlink message, after this downlink data message path is: source ILCR receives that Correspondent Node issues after the data message of terminal, be transmitted to source AGW, source AGW by the data channel between source AGW and target AGW by data message forwarding to target AGW, target AGW issues target ILCR by private downlink forwarding tunnel again, target ILCR peels off the RID encapsulating in this data message, revert to after the form of the data message that Correspondent Node sends, data are transmitted to target AGW by the tunnel between target AGW and target ILCR, target AGW again by this message by mailing to this terminal with terminal data passage.

In the present embodiment, after the tunnel between target AGW and target ILCR is set up, uplink data messages forwards from this tunnel, as D1204, D1206.Optionally, now uplink data messages also can forward from the tunnel between target AGW and source AGW, and data message is forwarded to source AGW from target AGW, then to source ILCR.

In the present embodiment, step 1209, to step 1215, also can advance to step 1203 and carry out simultaneously, in this case, terminal attaching ILR receives after the Correspondent Node information transmission request of source AGW, source ILCR, does not start the more new technological process of Correspondent Node, after receiving RID registration, restarts.

In the present embodiment, the mode of the RID of target ILCR obtaining communication opposite end is identical with the mode that target ILCR in other embodiment in system two closes obtaining communication opposite end RID.Other embodiment of system two also can adopt same procedure to obtain the RID of Correspondent Node.

The mode of the link information of AGW maintenance terminal and Correspondent Node can be to be safeguarded according to the real-time testing result notice of stream AGW by ILCR in the present embodiment, or AGW oneself detects maintenance.

The method that in the switching flow of embodiment eight to embodiment ten, AGW reports, upgrades to ILR in the method and system one of Correspondent Node information is substantially identical, difference is the link information to ILR reporting terminal and Correspondent Node by AGW, triggers ILCR report Correspondent Node AID-RID map information to ILR by AGW.Concrete difference following (only describe difference part herein, same section no longer describes in detail):

D1601, peels off by ILCR the RID encapsulating in this data message;

Step 1602,1603, by be the ILCR of this Terminal Service in transceiving data process, find new Correspondent Node, as according to the real-time testing mechanism of stream, preserve the AID-RID map information of Correspondent Node.And notify IAD to preserve the link information (being the AID map information of terminal and Correspondent Node) of terminal and Correspondent Node; Or be the IAD of this Terminal Service in transceiving data process, find new Correspondent Node, as according to the real-time testing mechanism of stream, the link information of preserving terminal and Correspondent Node.

Step 1604, AGW sends Correspondent Node information notice request, carried terminal and Correspondent Node link information to terminal attaching ILR;

If desired to terminal attaching ILR, report the AID-RID map information of Correspondent Node, AGW sends message to IICR, triggers ILCR and to terminal attaching ILR, reports the Correspondent Node AID-RID map information that does not report ILR.

Step 1606, ownership ILR returns to response to AGW, ILCR.

By AGW, process the terminal of local cache and the link information of Correspondent Node.

When the AID-RID mapping relations of a certain Correspondent Node of terminal change (as switching), ILCR is after receiving the notice of Correspondent Node ownership ILR, upgrade the local Correspondent Node AID-RID map information of preserving, if Correspondent Node AID-RID map information is reported to ownership ILR in step 1604, now also needs to notify this terminal attaching ILR to upgrade the AID-RID map information of this Correspondent Node.After the correspondence disconnection or a certain Correspondent Node off-line of terminal and a certain Correspondent Node, ILCR notification terminal ownership place ILR, IAD are deleted the map information of related communication opposite end.

In the switching flow of embodiment eight to embodiment ten, the method that terminal attaching ILR upgrades Correspondent Node is identical with the method in embodiment tetra-to embodiment seven.

Embodiment nine

Figure 13 is applicable to the forwarding of data in handoff procedure and uses the forwarding tunnel between ILCR, and initiates by target ILCR the scene that between ILCR, forwarding tunnel is set up, and flow process and Figure 10 are basic identical, and its concrete steps are described below:

Step 1301 is to step 1304, step 1304a, with step 1001 to step 1004,1004a;

The same D1001 of D1301, D1302, D1002.

Step 1304b, with step 1205b;

Step 1305, with step 1005;

D1303, D1304, same D1003,1004.

Step 1306 is to step 1317, step 1319, with step 1206 to step 1217, step 1219;

The same D1005 of D1305, D1306, D1006.

Step 1318, source ILCR or target ILCR initiate the release of data forwarding tunnel between the two;

In the present embodiment, after the tunnel between target AGW and target ILCR is set up, uplink data messages forwards from this tunnel, as D1304, D1306.Optionally, now uplink data messages also can forward from the tunnel between target AGW and source AGW, and data message is forwarded to source AGW from target AGW, then to source ILCR.

In the present embodiment, step 1309, to step 1315, also can advance to step 1303 and carry out simultaneously, in this case, terminal attaching ILR receives after the Correspondent Node information transmission request of source AGW, source ILCR, does not start the more new technological process of Correspondent Node, after receiving RID registration, restarts.

Embodiment ten

Figure 14 is applicable to data retransmission in handoff procedure and uses the forwarding tunnel between ILCR, and initiates by source ILCR the scene that between ILCR, forwarding tunnel is set up, and flow process and Figure 11 are basic identical.Its concrete steps are described below:

Step 1401 is to step 1407, step 1407a, with step 1101 to step 1107, step 1107a;

D1401, D1402, D1403, D1404, same D1101, D1102, D1103, D1104.

Step 1407b, with step 1207b;

D1405, D1406, same D1105, D1106.

Step 1408 is to step 1421, with step 1306 to step 1319;

D1407, D1408, same D1107, D1108.

In the present embodiment, after the tunnel between target AGW and target ILCR is set up, uplink data messages forwards from this tunnel, as D1406, D1408.Optionally, now uplink data messages also can forward from the tunnel between target AGW and source AGW, and data message is forwarded to source AGW from target AGW, then to source ILCR.

In the present embodiment, step 1409, to step 1415, also can advance to step 1403 and carry out simultaneously, in this case, terminal attaching ILR receives after the Correspondent Node information transmission request of source AGW, source ILCR, does not start the more new technological process of Correspondent Node, after receiving RID registration, restarts.

In switching flow in system two, AGW changes, not necessarily can cause the variation of ILCR, therefore source AGW need to be according to target ILCR identification information, or target AGW need to, according to source ILCR identification information, judge whether to occur the variation of ILCR, when ILCR does not change,, now there is not the tunnel between source ILCR and target ILCR in source ILCR and target ILCR unification, does not need to set up, delete tunnel between the two.When target ILCR is identical, whether ILCR can be also the RID that terminal distribution is new according to strategy decision, when being the new RID of terminal distribution, can adopt the flow chart of this patent.

Embodiment mono-to embodiment ten shown in Fig. 5-Figure 14 all be take and between AGW and ILCR, is existed dynamic tunnel to set forth switching flow as example, it is the scene in static tunnel that the various embodiments described above also go between AGW and ILCR, now in handoff procedure, between target AGW and target ILCR, no longer need to set up dynamic tunnel, tunnel between the two has created successfully when both power on, and other steps are identical.Target AGW has selected after target ILCR, can utilize tunnel notification target ILCR between the two to have terminal switch and the AID of this terminal is sent to target ILCR, or target ILCR knows by checking data message the AID that has terminal to switch and obtain this terminal.

System three

Fig. 4 b is the schematic diagram of the network architecture of the another kind of Wimax system of application above-mentioned identify label and position isolation technics, and in figure, solid line represents the connection of loading end, and dotted line represents the connection of chain of command.This Wimax network architecture comprises access business network (W-ASN) and is connected business network (W-CSN).Between W-ASN and broad sense Forwarding plane, there is data surface interface, be expressed as D1 interface.Between W-CSN and broad sense Forwarding plane, also can there is data surface interface, be expressed as D2.Broad sense Forwarding plane can be the packet data network of supporting RID route and forwarding data packets.

In W-CSN, there is the original network element in the Wimax frameworks such as AAA agency or server (AAA Proxy/Server), accounting server, interconnecting gateway equipment, also be provided with identity location register (ILR)/packet forwarding (PTF), the ILR/PTF in each W-CSN has formed mapping forward plane.

In W-CSN, HA and/or W-CR (core router) can retain, and also its function also can be transferred to AGW and realize.W-ASN comprises base station and AGW, on the basis of the functional entity that the AGW of AGW wherein in Wimax framework has (comprising DPF functional entity), has expanded and has realized the required new function of SILSN.

In the present embodiment, in WiMAX network, there is not ILCR, AGW is as external data channel end points, be used to terminal distribution RID, RID to ILR registration and unregistration terminal, RID to ILR query communication opposite end, safeguard and be not updated to the terminal of ILR and the link information of Correspondent Node, maintenance terminal and Correspondent Node AID-RID map information, to terminal attaching ILR, report, upgrade Correspondent Node information, data message is carried out to RID encapsulation and decapsulation, and realize the functions such as the route of data message and forwarding according to RID.

Described ILR is for receiving the registration and unregistration request of described AGW to this ILR home subscriber terminal, safeguard the AID-RID map information of home subscriber terminal, and the inquiry request of reception to terminal RID, RID corresponding to this terminal AID in request returned to inquiry request side, receive after the triggering message of upgrading Correspondent Node, the gateway of notice Correspondent Node access is new terminal AID-RID map information more.

With switch relatively:

Described AGW is for when terminal cut, for the new station location marker of this terminal distribution (RID) and preserve the map information of this terminal identity sign (AID) and this new RID, registers the RID of this terminal to this terminal attaching ILR; After terminal cuts out, discharge the resource to this terminal distribution; And carry out forward process to cutting, cut out the data message of terminal;

Particularly,

Described AGW comprises:

Incision control module, for after receiving AGW handover request, to station location marker (RID) distribution module, send and distribute notice, carry incision terminal AID, afterwards, to RID Registering modules, send registration notification, to ILR, send Correspondent Node information transmission request, and return to AGW handoff response to source AGW;

RID Registering modules, for initiate RID register flow path after receiving registration notification, upgrades the RID of this terminal of this terminal attaching identity location register (ILR) preservation;

Packet forwarding module, for carrying out RID encapsulation to the data message of incision terminal, separating RID encapsulation; Receive and issue after the downlink data message that cuts out terminal, by and target AGW between forwarding tunnel be forwarded to this target AGW, receive issue incision terminal downlink data message time, by the data channel with this terminal, send to this terminal; Also for the data message of the terminal from receiving, parse the link information of terminal and Correspondent Node, and notify link information maintenance module to safeguard;

Described ILR comprises:

Location registration process module, for after receiving the registration request of the RID that AGW sends, the AID of register update terminal and the correspondence relationship information of RID;

Further,

Described link information maintenance module reports, upgrades the link information of this terminal and Correspondent Node in real time to terminal attaching ILR, the RID update module that triggers this ILR initiate RID more the renewal Correspondent Node of new technological process trigger the RID registration request that message refers to that AGW sends.

Further,

The mode of map information maintenance module institute's obtaining communication opposite end AID-RID map information of described AGW is identical with system one;

Further,

Packet forwarding module in described AGW carries out the uplink data messages that cuts out terminal of receiving to be forwarded to broad sense Forwarding plane after RID encapsulation; Before receiving described the second notice, the uplink data messages that the incision terminal of receiving is sent is directly forwarded to source AGW, after receiving described the second notice, this uplink data messages is carried out being forwarded to broad sense Forwarding plane after RID encapsulation.

Embodiment 11

Figure 15 is that the present invention applies switching flow figure in the WiMAX network system three that accesses sign and position isolation technics.The scene of the forwarding tunnel between IAD is used in the forwarding that Figure 15 is applicable to data in handoff procedure, and its concrete steps are described below:

Step 1501, with step 501;

After this, terminal up-downgoing data message path is as shown in D1501, D1502.

D1501, downlink data message path: source AGW receives that Correspondent Node issues after terminal data message, peel off the RID encapsulating in this data message, revert to after the form of the data message that Correspondent Node sends, by the data channel between source AGW and target AGW by data message forwarding to target AGW, target access gateway by this message by mailing to this terminal with terminal data passage.

D1502, uplink data messages path: terminal sends upstream data literary composition to target BS, target BS by data message forwarding to target AGW, target AGW by the data channel between source AGW and target AGW by data message forwarding to source AGW, the AID of AGW obtaining communication opposite end, source, and inquire about the AID-RID map information in local cache, as find the RID of Correspondent Node, using the RID of this Correspondent Node as destination address, the RID of this terminal is as source address, be encapsulated in this data message, then by encapsulation after data message forwarding to target broad sense Forwarding plane, as do not found the RID of Correspondent Node, after being done to tunnel encapsulation, data message is forwarded to mapping forward plane, and to the RID of ILR query communication opposite end.Or data message is cached to this locality, after obtaining the RID of Correspondent Node, then using the RID of this Correspondent Node as destination address, the RID of this terminal is as source address, be encapsulated in this data message, then by encapsulation after data message forwarding to broad sense Forwarding plane.

Step 1502 is to step 1504, with step 502 to step 504;

After this, terminal up-downgoing data message path is as shown in D1503, D1504.

D1503, downlink data message path: source AGW receives that Correspondent Node issues after the data message of terminal, by the data channel between source AGW and target AGW by data message forwarding to target AGW, target AGW peels off the RID encapsulating in this data message, revert to after the form of the data message that Correspondent Node sends, target AGW by this message by mailing to this terminal with terminal data passage.

D1504, uplink data messages path: terminal sends upstream data literary composition to target BS, target BS by data message forwarding to target AGW, the AID of target AGW obtaining communication opposite end, and inquire about the AID-RID map information in local cache, as find the RID of Correspondent Node, using the RID of this Correspondent Node as destination address, the RID of this terminal, as source address, is encapsulated in this data message, then by encapsulation after data message forwarding to broad sense Forwarding plane; As do not found the RID of Correspondent Node, after being done to tunnel encapsulation, data message is forwarded to mapping forward plane, and to the RID of ILR query communication opposite end.Or data message is cached to this locality, after obtaining the RID of Correspondent Node, then using the RID of this Correspondent Node as destination address, the RID of this terminal is as source address, be encapsulated in this data message, then by encapsulation after data message forwarding to broad sense Forwarding plane.

Step 1505 is to step 1511, with step 506 to step 512;

D1505, downlink data message path: target AGW receives that Correspondent Node issues after terminal data message, peel off the RID encapsulating in this data message, revert to after the form of the data message that Correspondent Node sends, target access gateway by this message by mailing to this terminal with terminal data passage.

D1506, uplink data messages path, same D1504.

Before step 1509, may also can there is the data message being forwarded by source AGW, this be due to also fail to give notice Correspondent Node access gateway more new terminal AID-RID map information cause.At this moment the same D1503 in downlink data message path.

Step 1512, with step 514;

In the present embodiment, when target AGW receives after handover request, uplink data messages directly forwards from target AGW, as D1504, D1506.Optionally, now uplink data messages also can forward from the tunnel between target AGW and source AGW, and data message is forwarded to source AGW from target AGW.

In the present embodiment, source AGW just triggers ILR in step 1507 and upgrades Correspondent Node flow process, optionally, step 1508 also can advance to step 1503 carries out simultaneously, in this case, terminal attaching ILR receives after the Correspondent Node information transmission request of source AGW, does not start the more new technological process of Correspondent Node, after receiving RID registration, restarts.

In the present embodiment, the mode of obtaining communication opposite end RID during the mode homology of the RID of target AGW obtaining communication opposite end is unified.

In the present embodiment, AGW reports, upgrades the method homology of Correspondent Node information to ILR and to ILR, reports, upgrades the method for Correspondent Node information in unified, and just AGW no longer carries out with ILCR alternately.

In the present embodiment, the method for upgrading Correspondent Node in the method and system one of terminal attaching ILR renewal Correspondent Node is identical.

In all embodiment of the present invention, all by having IAD or the ILCR of target side to carry out terminal RID registration to terminal attaching ILR, optionally, can in mutual with target side network element, be obtained after the RID that target side network element is terminal distribution by IAD or the ILCR of source, to ILR, carry out terminal RID registration.

Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, or they are made into respectively to each integrated circuit modules, or a plurality of modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.

For simplified characterization, the above is not only applicable to WiMAX network, goes for other mobile communications networks yet.The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims

1. the changing method without fixed anchor point of Wimax system, is characterized in that, the method comprises: the identify label using access sign AID as terminal, the station location marker using Route Distinguisher RID as terminal;

Terminal completes after the switching of Wimax access business network grappling, source access gateway AGW sends AGW handover request to target AGW, this target AGW select target identity position core router ILCR, and this target ILCR between set up this tunnel while not setting up the tunnel of this terminal data message repeating;

This target ILCR, when different from source ILCR, points to for this terminal distribution the station location marker RID that this ILCR is new, preserves the map information of this terminal identity sign AID and new RID; This target ILCR or this target AGW initiate RID register flow path, upgrade the RID of this terminal of this terminal attaching identity location register ILR preservation; And this terminal attaching ILR initiates more new technological process of RID, receive that the gateway accessing to all Correspondent Nodes of this terminal after the triggering message of upgrading Correspondent Node sends RID update notification, carries the AID of this terminal and new RID;

2. changing method as claimed in claim 1, is characterized in that:

3. changing method as claimed in claim 1, is characterized in that:

4. changing method as claimed in claim 3, is characterized in that:

5. the changing method as described in claim 2,3 or 4, is characterized in that:

6. changing method as claimed in claim 1, is characterized in that:

7. changing method as claimed in claim 1, is characterized in that:

8. changing method as claimed in claim 1, is characterized in that:

9. changing method as claimed in claim 1, is characterized in that:

10. changing method as claimed in claim 1, is characterized in that:

In this handoff procedure:

11. changing methods as claimed in claim 1, is characterized in that, in this handoff procedure:

After forwarding tunnel between these two ILCR is set up, source ILCR receives after Correspondent Node is issued the data message of this terminal and is forwarded to this target ILCR by this forwarding tunnel, this target ILCR separates after RID encapsulation this data message, after forwarding or buffer memory, be forwarded to this target AGW, this target AGW sends to this terminal by the data channel with this terminal by this data message again.

12. changing methods as claimed in claim 11, is characterized in that, the described mode of setting up forwarding tunnel between two ILCR is:

13. changing methods as claimed in claim 8 or 9, is characterized in that:

14. changing methods as described in claim 1 or 6, is characterized in that:

15. changing methods as described in claim 1,8 or 9, is characterized in that:

16. changing methods as claimed in claim 1, is characterized in that, the mode of this target AGW select target ILCR is a kind of in following mode:

Mode one, this target AGW directly or mutual by visit aaa server and this terminal attaching aaa server, are obtained the information of the ILCR that this target AGW can connect, and are therefrom selected an ILCR as target ILCR;

When mode two, this terminal initial network, terminal attaching aaa server allows the ILCR of access directly or by visit aaa server to notify this terminal to this source AGW, source AGW allows the ILCR of access to notify this terminal to this target AGW in this handoff procedure, and target AGW therefrom selects an ILCR as target ILCR;

Mode three, this target AGW are according to the configuration information select target ILCR of self.

17. changing methods as claimed in claim 1, is characterized in that:

18. changing methods as claimed in claim 1, is characterized in that:

AGW in described Wimax system is arranged in access business network, comprises datapath function DPF; ILCR in described Wimax system is arranged in and connects business network, the function that comprises home agent HA and/or Wimax core router W-CR, between ILCR and broad sense Forwarding plane, have data-interface, described broad sense Forwarding plane is supported route and the forwarding of the data message of RID encapsulation.

19. changing methods as claimed in claim 1, is characterized in that:

The AGW handover request that this source AGW sends to this target AGW is grappling datapath function DPF handover request;

The AGW handoff response that this target AGW sends to this source AGW is grappling DPF handoff response.

20. changing methods as claimed in claim 1, is characterized in that:

Can realize the Wimax system of switching without fixed anchor point for 21. 1 kinds, comprise access business network and be connected business network, access business network comprises base station and access gateway AG W, described connection business network comprises identity location register ILR, identify label using access sign AID as terminal, the station location marker using Route Distinguisher RID as terminal; It is characterized in that:

In described connection business network, also comprise identity position core router ILCR, between described connection business network and access business network and broad sense Forwarding plane, there is data-interface;

Described ILCR is for when terminal cut, for the new station location marker RID of this terminal distribution and preserve the map information that this terminal identity identifies AID and this new RID; After terminal cuts out, be released to the resource of this terminal distribution; And carry out forward process to cutting, cut out the data message of terminal;

Described AGW is for realizing the switching of the Wimax access business network W-ASN grappling of terminal, and be incision terminal select target ILCR, and this target ILCR between also set up this tunnel while not setting up the tunnel of incision terminal data message repeating, by this tunnel, forward the data message of incision terminal;

22. Wimax systems as claimed in claim 21, is characterized in that, described AGW comprises:

23. want the Wimax system as described in 22 as right, it is characterized in that,

Described ILCR comprises:

Described AGW or ILCR also comprise:

RID Registering modules, for initiate RID register flow path after the registration notification of incision control module of receiving AGW or ILCR, to incision terminal attaching identity location register, ILR sends registration request and carries the AID of this incision terminal and new RID;

Described ILR comprises:

RID update module, initiates more new technological process of RID for trigger message according to the renewal Correspondent Node of receiving, receives that the gateway accessing to all Correspondent Nodes of this terminal after the triggering of upgrading Correspondent Node sends RID update notification, carries the AID of this terminal and new RID.

24. Wimax systems as claimed in claim 23, is characterized in that:

25. Wimax systems as claimed in claim 23, is characterized in that:

26. Wimax systems as claimed in claim 25, is characterized in that:

Link information maintenance module is in ILCR time, the control module that cuts out of this ILCR sends this Correspondent Node information transmission request to terminal attaching ILR after the switching notice of receiving source AGW or this object ILCR, and wherein this source AGW sends this switching notice to this source ILCR after receiving the handoff response that this object AGW sends; This object ILCR sends this switching notice setting up Hou Xianggai source, tunnel ILCR with this object AGW;

27. Wimax systems as claimed in claim 25, is characterized in that:

Link information maintenance module is in AGW time, and the control module that cuts out of AGW sends this Correspondent Node information transmission request to terminal attaching ILR after receiving the handoff response that target AGW sends;

28. Wimax systems as described in claim 26 or 27, is characterized in that:

29. Wimax systems as claimed in claim 23, is characterized in that:

The RID update module of described ILR, initiating RID more during new technological process, according to the map information of Correspondent Node AID-RID, local configuration information or DNS inquiry, determine the gateway of described Correspondent Node access, gateway to the access of described Correspondent Node sends RID update notification, carries the map information of this terminal AID and new RID.

30. Wimax systems as claimed in claim 23, is characterized in that:

31. Wimax systems as claimed in claim 23, is characterized in that:

32. Wimax systems as claimed in claim 23, is characterized in that:

33. Wimax systems as claimed in claim 23, is characterized in that:

34. Wimax systems as claimed in claim 23, is characterized in that:

Packet forwarding module in described ILCR issues by receiving the data message that cuts out terminal, before forwarding tunnel between source, target ILCR is set up, after the data message of issuing this terminal of receiving is separated to RID encapsulation, be transmitted to again source AGW, after described forwarding tunnel is set up, the data message of issuing this terminal of receiving be directly forwarded to this target ILCR by this forwarding tunnel; Forwarding tunnel between source, target ILCR is directly transmitted to this target AGW by the data message of issuing incision terminal of receiving before setting up; After forwarding tunnel between source, target ILCR is set up, by the data message of issuing incision terminal of receiving separate forward again after RID encapsulation or buffer memory after be transmitted to again this target AGW;

35. Wimax systems as claimed in claim 34, is characterized in that:

36. Wimax systems as claimed in claim 23, is characterized in that:

37. Wimax systems as claimed in claim 23, is characterized in that, the mode of the incision control module select target ILCR in described AGW is a kind of in following mode:

38. Wimax systems as claimed in claim 23, is characterized in that:

39. Wimax systems as claimed in claim 23, is characterized in that:

In described AGW to cut out the AGW handover request that control module sends to target AGW be grappling datapath function DPF handover request; The AGW handoff response that incision control module in described AGW sends to source AGW is grappling DPF handoff response.