CN102137467A

CN102137467A - WiMAX (Worldwide Interoperability for Microwave Access) system for switching without fixed anchors and switching method thereof

Info

Publication number: CN102137467A
Application number: CN201010100122XA
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: 2011-07-27
Anticipated expiration: 2030-01-22
Also published as: CN102137467B; WO2011088606A1

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

Realize Wimax system and changing method thereof that no fixed anchor point switches

Technical field

The present invention relates to the switching of communication technical field, relating in particular to a kind of the realization does not have Wimax system and the changing method thereof that fixed anchor point switches.

Background technology

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

There is following deficiency in the existing network technology of using ICP/IP protocol:

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

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

The purpose that identify label and position separation problem propose is for problems such as the semanteme overload that solves the IP address and routing overhead are serious, the dual-use function of IP address is separated, realize the support that the problems such as exchanging visit between the heterogeneous networks zone in routing overhead and the 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 a kind of network frames that makes up for this deficiency that overcomes the existing network technology.Host Based HIP agreement etc. need be done bigger change to terminal and upper-layer service, disposes difficulty; Move simultaneously at the communication two ends, the position update stage needs network to participate in the maintain communications link, otherwise the message dropping problem will take place.Based on network LISP agreement is that the subsidiary problem that solves in back is separated in the identity position for mobility and many caves property, does not also have 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 generally is made up of three parts: terminal, Wimax access business network (Wimax Access ServiceNetwork, abbreviation W-ASN) is 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 finishes the WiMAX terminal connects, (Authentication, Authorization and Accounting are chargeed in the devolved authentication mandate, AAA) (Network Service Provider, is that three layers (L3) of WiMAX terminal are connected tunnel maintenance between relaying, RRM, W-ASN and the W-CSN is provided at network selecting NSP) and discovery to message to H-CSN (ownership CSN), network service provider.Under the scene that moves, 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 also is used for managing I EEE 802.16 air interfaces, for the WiMAX terminal use provides wireless access.At least (Base Station, BS) (W-ASNGateway AGW) forms W-ASN, can comprise single AGW or a plurality of AGW with an IAD by a base station.(Mobile Station, the intercommunication that MS) (is referred to as terminal in the literary composition) is in R3 reference point and W-CSN intercommunication, in R4 reference point and another W-ASN intercommunication at R1 reference point and travelling carriage for W-ASN.Wherein, the operator of management W-ASN is called NAP (Network Access Provider, network insertion operator).

W-CSN is the combination of a cover network function, and W-CSN can be made up 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 permission control, W-ASN and the W-CSN, roaming, the mobile management between W-CSN and the WiMAX business between W-CSN.

Wherein:

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

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

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

Interface R4 is the interface between the IAD.

Interface when the R5 interface is roaming between visit W-CSN and the ownership W-CSN.

The R6 interface is the interface between base station and the IAD.

The R8 interface is the interface between the base station.

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

The switching of W-ASN grappling is an anchor point with the grappling IAD that comprises grappling datapath function (DPF), and terminal switches to target BS from source base station during switching, and source grappling IAD is constant; When target BS is not the direct service object of source grappling IAD,, transmit the data message of terminal by this passage for setting up data channel between the target access gateway of target BS service and the source grappling IAD;

The switching of W-CSN grappling is anchor point with the home agent, finish the switching of W-ASN grappling when terminal after, if the grappling IAD need change, source grappling IAD or target access gateway are initiated the switching of W-CSN grappling, after switching is finished, terminal inserts to become from target access gateway from source grappling IAD and inserts, and the data channel between source grappling IAD and the target access gateway can be deleted, and the anchor point home agent does not change; At this moment, the identity of target access gateway also changes target grappling IAD into.

In sum, the switching in the existing WiMAX system all needs the support of fixed anchor point to finish, and the introducing of fixed anchor point has brought the circuitous problem of packet path, has increased the weight of transmission delay and bandwidth waste.To insert sign and be applied to the WiMAX network with the position isolation technics, can support that in theory the WiMAX conventional terminal does not have the mobility of fixed anchor point, solve the circuitous problem of packet path, but also can reach the purpose that solves IP address dual identity, but how to realize not having fixed anchor point switch, also do not have relevant solution at present based on the WiMAX system.

Summary of the invention

The technical problem to be solved in the present invention, providing a kind of the realization does not have WiMAX system and the changing method thereof that fixed anchor point switches, and described point switches to realize not having fixedly, and the path of having reduced packet is circuitous, has reduced transmission delay and bandwidth waste.

For solving above technical problem, the invention provides the changing method of the no fixed anchor point of a kind of Wimax system, comprising:

After terminal is finished the switching of Wimax access business network grappling, source access gateway (AGW) sends the AGW handoff request to target AGW, this target AGW select target identity position core router (ILCR), and this target ILCR between set up this tunnel when not setting up the tunnel that this terminal data message transmits;

This target ILCR with source ILCR not simultaneously, point to the new RID of this ILCR for this terminal distribution, preserve the map information of this terminal identity sign (AID) and new RID; This target ILCR or this target AGW initiate the 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, receives that the gateway that inserts to all Correspondent Nodes of this terminal after the triggering message of upgrading Correspondent Node sends the RID update notification, carries the AID of this terminal and new RID;

This target AGW sends the AGW handoff response to this source AGW, switch finish after, transmit message between this terminal and the Correspondent Node by this target ILCR and this target AGW.

Further,

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

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

After this terminal attaching ILR receives the RID register requirement of this purpose ILCR transmission, initiate more new technological process of RID, and described link information is safeguarded according to the link information of this terminal received and Correspondent Node.

Further,

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

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 the RID register flow path, with 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 register requirement of arriving after this terminal attaching ILR receives, initiate more new technological process of RID, and described link information is safeguarded according to the link information of terminal of receiving and Correspondent Node.

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 purpose ILCR; Wherein this source AGW sends this switching notice to this source ILCR after receiving the handoff response that this purpose AGW sends; This purpose ILCR sends this switching notice to this source ILCR after setting up the tunnel with this purpose 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:

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

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

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

Obtain the AID-RID map information of Correspondent Node and be kept at this locality from source AGW or source ILCR inquiry.

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, determine the gateway that described Correspondent Node inserts according to the map information of Correspondent Node AID-RID, local configuration information or DNS inquiry, the gateway that inserts to described Correspondent Node sends the RID update notification, carries the map information of this terminal AID and new RID;

After the gateway that described Correspondent Node inserts is received the RID update notification, the AID-RID map information of this terminal of preserving is updated to the described map information that carries in this notice.

Further,

Message between this terminal and the Correspondent Node is transmitted to the other side in this target AGW and this target ILCR tunnel by between the two;

After tunnel between this target AGW and the target ILCR is this target AGW select target ILCR, set up the dynamic tunnel of this terminal that flow process sets up by the tunnel, target ILCR sets up the AID that flow process is obtained this terminal by this tunnel, is the new RID of this terminal distribution again; Perhaps, the tunnel between this target AGW and the target ILCR is the back static tunnel of setting up for both power on, and target ILCR is according to notice or the AID by checking that data message is known to be had the terminal switching and obtain this terminal of target AGW.

Further,

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

Setting up between target AGW and the target ILCR before tunnel or this target AGW selected to establish the target ILCR in static tunnel with this AGW, this target AGW sends to this terminal by the data message of source AGW being sent with the data channel of this terminal;

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

Further,

In this handoff procedure, this source ILCR receives after Correspondent Node sends to the data message of this terminal this data message separated the RID encapsulation and is transmitted to this source AGW, this source AGW receive behind this data message by and this target AGW between the forwarding tunnel be forwarded to this target AGW; This target AGW sends to this terminal by the data message of source AGW being sent with the data channel of this terminal.

Further, in this handoff procedure:

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

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

Further, in this handoff procedure:

At this source ILCR and target ILCR not simultaneously, set up between two ILCR and transmit the tunnel, this forwarding tunnel discharges after switching is finished;

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

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

This source AGW sends to this target AGW with the identification information of source ILCR, and this target AGW re-sends to this target ILCR with the identification information of this source ILCR at the target ILCR that selects and this source ILCR not simultaneously, and this target ILCR is established to the forwarding tunnel of this source ILCR; Perhaps

Behind this target AGW select target ILCR, the identification information of this target ILCR is issued this source AGW, this source AGW re-sends to this source ILCR with the identification information of this target ILCR at this target ILCR and source ILCR not simultaneously, and this source ILCR is established to the forwarding tunnel of this target ILCR.

Further,

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

Further,

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

If have this terminal AID-RID map information among the Correspondent Node ownership ILR, then the gateway of Correspondent Node access or this terminal attaching ILR notifying communication opposite end 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 the Correspondent Node that inserts 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 with this data message forwarding, this source ILCR carries out the RID encapsulation to this data message and transmits, and sends to the gateway that this Correspondent Node inserts through the broad sense Forwarding plane; Perhaps

In handoff procedure, adopt described path one to transmit earlier, after this target AGW and target ILCR set up dynamic tunnel or after this target AGW selected to establish 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 the RID encapsulation to this data message and transmits, and sends to the gateway that this Correspondent Node inserts through the 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, this target AGW and target ILCR set up after the dynamic tunnel or this target AGW has selected to establish after the target ILCR in static tunnel with this AGW, and AGW returns the AGW handoff response to this source; Perhaps

When this target ILCR is identical with source ILCR, this target ILCR divides new RID for this terminal and preserves this terminal AID and the map information of new RID, and adopts the mode not identical simultaneously with source ILCR with this target ILCR to initiate the RID register flow path and to the RID of opposite end new technological process more.

Further,

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

After this terminal attaching ILR receives described RID register requirement, the RID of this terminal of preserving is updated to this new RID.

Further,

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

Further,

This target AGW is after this terminal attaching ILR sends described RID register requirement, perhaps, this target AGW and target ILCR between the tunnel set up finish after, send the AGW handoff response to source AGW;

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

For solving above technical problem, the present invention also provides a kind of the realization not have the Wimax system that fixed anchor point switches, comprise access business network and be connected business network, comprise base station and IAD (AGW) in the access business network, comprise identity location register (ILR) in the described connection business network

Also comprise identity position core router (ILCR) in the described connection business network, have data-interface between described connection business network and access business network and the broad sense Forwarding plane;

Described ILCR is used for when terminal is 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; Reach the data message of cutting, cut out terminal is transmitted processing;

Described AGW is used to realize the switching of Wimax access business network (W-ASN) grappling of terminal, and for cutting terminal select target ILCR, and this target ILCR between also set up this tunnel when setting up the tunnel that incision terminal data message transmits, transmit the data message of incision terminal by this tunnel.

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

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

The changing method of the no fixed anchor point of Wimax of the present invention system and the mobile communications network that identify label is separated with the position of Wimax system are applied to the 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 that the notifying communication opposite end is inserted, ILCR or other gateway such as borde gateway) new terminal AID-RID map information more, thereby realize the switching of no fixed anchor point, the path of having reduced packet is circuitous, reduce transmission delay and bandwidth waste, but also can reach the purpose that solves IP address dual identity.

Description of drawings

Description of drawings is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.

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

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

Fig. 3 is existing WiMAX network architecture schematic diagram.

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

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

Fig. 5 is the flow chart that the present invention realizes not having the embodiment one of the changing method that fixed anchor point switches.

Fig. 6 is the flow chart that the present invention realizes not having the embodiment two of the changing method that fixed anchor point switches.

Fig. 7 is the flow chart that the present invention realizes not having the embodiment three of the changing method that fixed anchor point switches.

Fig. 8 is the flow chart that the present invention realizes not having the embodiment four of the changing method that fixed anchor point switches.

Fig. 9 is the flow chart that the present invention realizes not having the embodiment five of the changing method that fixed anchor point switches.

Figure 10 is the flow chart that the present invention realizes not having the embodiment six of the changing method that fixed anchor point switches.

Figure 11 is the flow chart that the present invention realizes not having the embodiment seven of the changing method that fixed anchor point switches.

Figure 12 is the flow chart that the present invention realizes not having the embodiment eight of the changing method that fixed anchor point switches.

Figure 13 is the flow chart that the present invention realizes not having the embodiment nine of the changing method that fixed anchor point switches.

Figure 14 is the flow chart that the present invention realizes not having the embodiment ten of the changing method that fixed anchor point switches.

Figure 15 is the flow chart that the present invention realizes not having the embodiment 11 of the changing method that fixed anchor point switches.

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

Embodiment

The changing method of the no fixed anchor point of Wimax of the present invention system and the main thought of Wimax system are, the mobile communications network that identify label is separated with the position is applied to the 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 that the notifying communication opposite end is inserted, ILCR or other gateway such as borde gateway) new terminal AID-RID map information more, thereby realize the switching of no fixed anchor point, the path of having reduced packet is circuitous, reduce transmission delay and bandwidth waste, but also can reach the purpose that solves IP address dual identity.

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

Two kinds of sign types are arranged: insert sign (AID:Access Identifier) and Route Distinguisher (RID:Routing Identifier) in the network of SILSN framework.Wherein, AID is the User Identity of terminal, and network remains constant in the terminal moving process for each terminal use distributes an AID; RID is that network is the station location marker of terminal distribution, uses at backbone network.It should be noted that identify label can have different titles with station location marker at different SILSN frameworks, but essence is the same.After the user contracts and becomes this architecture network user, the operation of distributing telephone numbers of can in this user attaching authentication center and ownership ILR, opening an account, authentication center and ILR write down this attribute of user data, are included as the AID that this user distributes.After the processing that finishing 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 the SILSN framework, terminal can be one or more in portable terminal, fixed terminal and the roam terminals, as mobile phone, landline telephone, computer and server or the like.

In the 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 the ASN are provided.Two layers of possible access means comprise: cellular mobile network technology (GSM/CDMA/TD-SCDMA/WCDMA/Wimax/LTE), DSL, band optical fiber insert or WiFi inserts or the like.

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

In the 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 insert backbone network through ASN.The RID that ASN distributes comprises the address information of this ASN, and during as the destination address of data message, this data message will be routed to this ASN with this RID.

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

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

Alternatively, backbone network can also comprise:

Packet forward function (PTF:Packet Transfer Function) is also referred to as the packet forward functional node, and being used for route and transmitting with AID is the data message of destination address.

Interconnect services node (ISN), has interface with generic router, ASN and ILR, be used to inquire about, safeguard the AID-RID map information of present networks terminal, the data message that comes and goes between encapsulation, route and forwarding present networks and the traditional IP is realized interconnecting of two networks.

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

The SILSN framework initial stage can traditional IP one or more isolated island forms exist and development, 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 is in same plane with Traditional IP, by ISN and traditional IP intercommunication.The SILSN framework possesses the ability of independent networking, can form to break away from the network that traditional IP develops alone, and in this stage, functional entity ISN will no longer exist.

The present invention in the WiMAX system, realizes above-mentioned SILSN framework applications not have fixed anchor point and switches.SILSN framework and operation principle thereof according to the background technology record can be understood, and when terminal moved the switching of striding ASN, the target ASN that cuts a side will be terminal distribution RID, initiate registration to this terminal attaching ILR; 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 these all Correspondent Nodes of terminal.For the message that makes Correspondent Node send to this terminal can be routed to target ASN rapidly, need send the RID update notification to the gateway that Correspondent Node inserts.In handoff procedure, source ASN need transmit the message that Correspondent Node sends to this terminal to target ASN.

Hereinafter be primarily aimed to realizing that no fixed anchor point switches the improvement of carrying out and described on original system, comprise relevant function and flow process.In the literary composition, the network element that the Correspondent Node of terminal is inserted abbreviates the opposite end network element as; 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 terminal, is called Correspondent Node with the user terminal of the user terminal communication that inserts this network element.In addition, because the present invention's realization is that no fixed anchor point switches, so the source grappling IAD in the former switching flow is referred to as source access gateway, target grappling IAD is referred to as target access gateway.

Fig. 4 a, Fig. 4 b are applied to system behind the WiMAX network with 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 terminal, with the Correspondent Node that is called of the user terminal communication that inserts this network element.

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, can be implemented so that those skilled in the art can better understand the present invention also, 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 using a kind of Wimax system of above-mentioned identify label and position isolation technics, and solid line is represented the connection of loading end among the figure, and dotted line is represented the connection of chain of command.This Wimax network architecture comprises access business network (W-ASN) and is connected business network (W-CSN).The connection business network has the data surface interface to the broad sense Forwarding plane, is expressed as D interface.The broad sense Forwarding plane can be the packet data network of supporting by RID route and forwarding data message, and other embodiment together.

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

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

In the 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 not to be 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, the data message is carried out RID encapsulation and decapsulation, and the route and the forwarding that realize data message according to RID.

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

ILR, be arranged in W-CSN, be used to receive 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 reception is to the query requests of terminal RID, the RID of this terminal AID correspondence in the request is returned to query requests side, and receive that the gateway that inserts to all Correspondent Nodes of this terminal after the triggering message of upgrading Correspondent Node sends the RID update notification.

With switch relevant, (following do not particularly point out, corresponding to embodiment one to three):

AGW is used for when terminal is cut, and 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 resource to this terminal distribution; And incision, the data message that cuts out terminal transmitted processing;

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

Particularly, AGW comprises:

Cut out control module, be used for sending the AGW handoff request, after switching is finished, be released to the resource of this terminal distribution to target AGW;

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

The described control module that cuts out is grappling datapath function (DPF) handoff request to the AGW handoff request that target AGW sends; Described incision control module is a grappling DPF handoff response to the AGW handoff response that source AGW sends.

The RID distribution module is used for distributing the notice back to point to the new RID of this AGW for this terminal distribution receiving, preserves the map information of this terminal AID and this new RID;

The RID Registering modules is used for initiating the RID register flow path after receiving registration notification, sends the RID register requirement to terminal attaching identity location register (ILR), upgrades the RID of this terminal of this terminal attaching ILR preservation;

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

Packet forwarding module, being used for data message to the incision terminal carries out RID encapsulation, separates the RID encapsulation and transmit and transmit to target side after will sending to the data message that cuts out terminal receiving, also be used for parsing the link information of terminal and Correspondent Node, and notice link information maintenance module is safeguarded from the data message of the terminal received;

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

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

Described ILR comprises:

The location registration process module is used for after receiving the RID register requirement that AGW sends the AID of register update terminal and the correspondence relationship information of RID;

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

Described ILCR comprises packet forwarding module, and being used for route and transmitting with RID is the data message of 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 register requirement 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 be used for after receiving the handoff response that this purpose AGW sends, sending Correspondent Node information transmission request to terminal attaching ILR, wherein carry this link information maintenance module and also be not updated to the terminal of terminal attaching ILR and the link information of Correspondent Node, and notify this link information maintenance module to stop maintenance the link information that cuts out terminal;

Carry this link information maintenance module in the RID register requirement that described RID Registering modules sends and also be not updated to the terminal of terminal attaching ILR and the link information of Correspondent Node;

The RID update module that triggers this ILR initiate RID more the renewal Correspondent Node of new technological process trigger transmission request of Correspondent Node information or the RID register requirement that arrives after message refers to.

Further,

Described AGW also comprises the map information maintenance module, is used for reporting, upgrading to terminal attaching ILR the AID-RID map information of the Correspondent Node of this terminal, 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:

Resolve acquisition according to the downlink data message of receiving that sends to terminal; Or

Inquire the AID-RID map information of Correspondent Node from Correspondent Node ownership ILR; Or

Inquire about the AID-RID map information that obtains Correspondent Node from source AGW or source ILCR.

Further, (corresponding embodiment one)

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

Further, (corresponding embodiment two, three)

Described ILCR comprises that also the tunnel sets up module, be used to the incision terminal set up with source ILCR between the forwarding tunnel, or for cut out that terminal is set up and target ILCR between the forwarding tunnel, and after switching is finished this forwarding tunnel of release;

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

System one sets up that the mode in tunnel has following two kinds between ILCR: (corresponding embodiment two)

One, (corresponding embodiment two) described control module that cuts out also is used for the identification information of source ILCR is sent to target AGW; Described incision control module also is used at the target ILCR that selects and this source ILCR not simultaneously, and the identification information of source ILCR is sent to target ILCR; The forwarding tunnel that module is used for being established to according to the identification information of the source ILCR that receives this source ILCR is set up in tunnel among the described ILCR;

Two, (corresponding embodiment three) described incision control module also is used for the identification information of target ILCR is issued source AGW; The described control module that cuts out also is used for the target ILCR that will receive and source ILCR not simultaneously, and the identification information of this target ILCR is sent to source ILCR; The forwarding tunnel that module is used for being established to according to the identification information of the target ILCR that receives this target ILCR is set up in tunnel among the described ILCR.

Further,

The described control module that cuts out is when target AGW sends handoff request, and the packet forwarding module in this AGW sends first notice;

Described incision control module receives when source AGW sends handoff request that the packet forwarding module in this AGW sends second notice;

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

Further,

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

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 insert, the ILCR that described permission inserts 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 three all are based on above system one and realize that terminal do not have that fixed anchor point switches.Below in conjunction with accompanying drawing and each embodiment is described in detail.

Embodiment one

Fig. 5 is based on system's one realization terminal does not have first kind of flow chart that fixed anchor point switches, and the forwarding tunnel in handoff procedure between the use AGW carries out the scene of data forwarding, and its concrete steps are described below:

Step 501, move and finish the switching of W-ASN grappling when the terminal that is in connected state after, terminal inserts to switch to from target BS from source base station and inserts, and has set up data channel between source AGW and the target AGW;

Except that particularly pointing out, the terminal of mentioning in the flow process refers to this terminal of switching, other embodiment with.

Terminal can be finished the switching of W-ASN grappling by existing standard.After having set up data channel between source AGW and the target AGW, terminal up-downgoing data message path is shown in D501, D502:

D501, the downlink data message path:

After source ILCR receives that Correspondent Node is issued the data message of terminal, be transmitted to source AGW, source AGW peels off the RID that encapsulates in this data message, after reverting to the form of the data message that Correspondent Node sends, give target AGW by the data channel between source AGW and the target AGW with data message forwarding, target access gateway again with this message by mailing to this terminal with the terminal data passage.

D502, the uplink data messages path:

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

In the literary composition, certain network element carries out in RID encapsulation and forwarding and the background technology ASN to the data message, and the data message is carried out the RID encapsulation is similar with transmitting, 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, with the RID of this terminal and Correspondent Node respectively as the source, destination address is encapsulated in the data message, be forwarded to broad sense Forwarding plane (when this network element is AGW) by source ILCR again after directly being forwarded to broad sense Forwarding plane when not having ILCR (when this network element is ILCR, or) or being forwarded to source ILCR; As not finding, then this network element is encapsulated in the RID of this terminal in the data message as source address, is forwarded to the mapping Forwarding plane or is forwarded to the mapping Forwarding plane through source ILCR, inquires the RID and the buffer memory of Correspondent Node simultaneously to ILR.When not finding the RID of Correspondent Node, can also adopt another kind of RID encapsulation and pass-through mode: earlier data message is cached to this locality, inquire the RID and the buffer memory of Correspondent Node again from ILR, and then the RID of this terminal and Correspondent Node is encapsulated in the data message as source, destination address respectively, be forwarded to the broad sense Forwarding plane by source ILCR again after directly being forwarded to the broad sense Forwarding plane or being forwarded to source ILCR.

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

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

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

In data message transmitting-receiving process, source AGW reports, upgrades Correspondent Node information to terminal attaching ILR, and optionally safeguards, upgrades local Correspondent Node information of preserving.

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

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

Source AGW can send grappling DPF handoff request after receiving target AGW grappling DPF handoff trigger message and agreeing to carry out grappling DPF switching.Send grappling DPF handoff request in the time of also can being source AGW decision initiation grappling AGW reorientation.

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

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

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

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

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

In the literary composition, between AGW and the ILCR, all can there be multiple mode in tunnel between ILCR and the 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 shown in D503, D504:

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

D504, the uplink data messages path: terminal sends the upstream data literary composition to target BS, target BS is given target AGW with data message forwarding, target AGW carries out the RID encapsulation to the data message and transmits, be forwarded to the broad sense Forwarding plane through target ILCR and/or mapping Forwarding plane, send to the gateway that the opposite end is inserted through the broad sense Forwarding plane again.

In the data message process of transmitting, target AGW reports, upgrades Correspondent Node information to terminal attaching ILR, and optionally safeguards, upgrades local Correspondent Node information of preserving.

Step 506, target AGW initiates the RID register flow path to terminal attaching ILR after distributing new RID, by the RID register requirement 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 the local Correspondent Node information of preserving, then the information that will not report is carried at reporting terminal ownership ILR in the message, and this ILR preserves the information of the Correspondent Node of receiving.If preserved Correspondent Node AID-RID map information among the terminal attaching ILR, then target AGW reports the link information that comprises terminal and Correspondent Node in the Correspondent Node information of terminal attaching ILR, Correspondent Node AID-RID map information in this step; Otherwise, only need the link information of reporting terminal and Correspondent Node.

Step 507, after ownership ILR receives the RID register requirement of target AGW, the legitimacy of checking AID, and the map information of the current AID-RID of preservation terminal;

In another embodiment, aaa server may close with ILR and establish, and is expressed as AAA/ILR.At this moment, target AGW can be after being the new RID of terminal distribution, the register flow path of step 506 and step 507 is set up flow process with the tunnel that step 505 target ILCR initiates to be combined, take this terminal AID and new RID to target ILCR, the identifying procedure that this target ILCR uses terminal attaching AAA/ILR again takes the new RID of this terminal AID to this terminal attaching AAA/ILR, and the RID of this terminal that this terminal attaching AAA/ILR will preserve is updated to this new RID that receives.Other embodiment also can do this variation.

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

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

D506, uplink data messages path: same D504.

At this moment, also can have the data message of transmitting by source ILCR, this be since also fail to give notice gateway that Correspondent Node inserts 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, finishes 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 the local Correspondent Node information of preserving, then the information that will not report is carried at reporting terminal ownership ILR in the message, and this ILR preserves the information of the Correspondent Node of receiving.If preserved Correspondent Node AID-RID map information among the terminal attaching ILR, then source AGW reports the link information that comprises terminal and Correspondent Node in the Correspondent Node information of terminal attaching ILR, Correspondent Node AID-RID map information in this step; Otherwise, only need the link information of reporting terminal and Correspondent Node.

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

Step 511 after terminal attaching ILR finishes the Correspondent Node renewal, is responded Correspondent Node information to source AGW and is transmitted response message, and notification source AGWAGW Correspondent Node upgrades to be finished;

Terminal attaching ILR also can be after step 509 execution in step 511 immediately, needn't waiting step 510 finish, this moment, the implication of step 511 was that ILR is to receiving the affirmation of source AGW message.After ILR execution of step 510, send the renewal Correspondent Node can for again source AGW and finish message.

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

To each Correspondent Node of this terminal, if this Correspondent Node is not communicated by letter with the other-end that inserts source AGW, then source AGW also deletes the AID-RID map information of this Correspondent Node, otherwise continues to keep the AID-RID map information of this Correspondent Node.

This step can start in step 508 back, also can receive ILR finish 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, initiate the release in tunnel behind the timer expiry again after step 508 or step 511.

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 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 was set up, uplink data messages was promptly transmitted from this tunnel, as D504, D506.Optionally, this moment, uplink data messages also can be transmitted from the tunnel between target AGW and the source AGW, and promptly data message is forwarded to source AGW from target AGW, arrives source ILCR again.

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

Among 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, and select as indicating according to local policy or terminal, can select the mode of HA with reference to AGW.Under the roaming condition, this needs to transmit by the visit aaa server alternately, the ILCR information notification target AGW that the visit aaa server can will allow target AGW to connect in repeating process.

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

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

The said Correspondent Node information of the present invention comprises the link information of terminal and Correspondent Node at least, the map information that can also comprise Correspondent Node, wherein the link information of terminal and Correspondent Node comprises the correspondence relationship information of this terminal AID and all Correspondent Node AID, and 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 (as target AGW, target ILCR) of the client information map information of obtaining communication opposite end in the following manner

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

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

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

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

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

Step 1601 after terminal inserts AGW, is communicated by letter with Correspondent Node foundation, and after this, terminal up-downgoing data message path is shown in D1601, D1602;

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

D1602, the uplink data messages path: terminal sends the upstream data literary composition to the base station, and AGW is given with data message forwarding in the base station, is forwarded to the broad sense Forwarding plane through homonymy ILCR and/or mapping Forwarding plane again, sends to the gateway that the opposite end is inserted through the broad sense Forwarding plane again.

Step 1602,1603, for the AGW of this Terminal Service in the transceive data process, find new Correspondent Node,, 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 as according to the real-time testing mechanism of stream;

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, promptly notify once changing; Perhaps, AGW also can be in batches report the information of Correspondent Node to ownership ILR, for example, and at set intervals or when the number of Correspondent Node reaches predetermined quantity, to belonging to the information that ILR reports Correspondent Node.

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

Step 1606, ownership ILR returns response to AGW;

After receiving the success response returned of ownership ILR, AGW can be according to setting the information that the Correspondent Node that has reported was stayed or deleted to policy selection in the Correspondent Node table relaying continuation of insurance of terminal.And if set strategy is the mode that adopts real-time report, then need not to preserve again the Correspondent Node table among the AGW, thereby solved among the AGW the excessive and problem of committed memory and handling property of Correspondent Node table greatly.

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

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

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

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

Among 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 source grappling to insert the triggering of IAD or source ILCR, be that source AGW or source ILCR need not send the transmission of Correspondent Node information and ask triggering terminal ownership ILR to upgrade the process of Correspondent Node, this moment, terminal attaching ILR was after the RID registration of receiving target grappling IAD or target ILCR, directly started the Correspondent Node process of upgrading.

(2) AGW or ILCR adopt the non real-time mode when terminal attaching ILR reports Correspondent Node information, transmission request of Correspondent Node information or RID register requirement that the triggering message of upgrading Correspondent Node arrives after being;

Among all embodiment of the present invention, when AGW or ILCR adopt the non real-time mode, for example, at set intervals or when the number of Correspondent Node reaches predetermined quantity, to belonging to the information that ILR reports Correspondent Node.Target AGW or target ILCR need report the local Correspondent Node information of preserving to give terminal attaching ILR when carrying out the RID registration simultaneously.Terminal attaching ILR receives the Correspondent Node information transmission request that source AGW or source ILCR send or receives target AGW or during RID register requirement that target ILCR sends, be triggered and initiate more new technological process of Correspondent Node.

It is that example describes when terminal attaching ILR reports Correspondent Node information that the idiographic flow of each embodiment all adopts the non real-time mode with AGW or ILCR.

In all embodiment of the present invention, after terminal attaching ILR finishes the Correspondent Node renewal, optionally, can finish message to target AGW or target ILCR transmission renewal, target AGW or target ILCR can be provided with the timer wait at this moment and discharge the forwarding tunnel.

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

B, if there is a Correspondent Node AID-RID map information, determine the gateway that Correspondent Node inserts (as can be, perhaps DNS inquiry etc.) according to Correspondent Node AID-RID map information again according to configuration querying; If there is not Correspondent Node AID-RID map information, then 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 that Correspondent Node inserts, the gateway that inserts to described Correspondent Node sends the RID update notification, carries the map information of this terminal AID and new RID;

After the gateway that C, Correspondent Node insert is received update notification, upgrade the terminal AID-RID map information of local cache, finish renewal after, ILR returns response message to terminal attaching;

If have terminal AID-RID map information among the Correspondent Node ownership ILR, then the gateway of Correspondent Node access or terminal attaching ILR also need more new terminal AID-RID map information of notifying communication opposite end ownership ILR.

D, terminal attaching ILR finish and return success the AGW that message inserts to terminal after Correspondent Node upgrades.

Finish Correspondent Node more before the new technological process at terminal attaching ILR, the Correspondent Node link information of terminal, Correspondent Node AID-RID map information may have renewal, as receive the notice of upgrading the Correspondent Node map information, increase new Correspondent Node etc.The gateway that this moment, terminal inserted should be with 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 having sent the more notice of new terminal map information to the original gateway that inserts of this Correspondent Node, then also need to send the more notice of new terminal map information to the new gateway that inserts of this Correspondent Node once more.

Embodiment two

Present embodiment is based on the network architecture of the WiMAX system of the application identity of system one sign and position isolation technics, in realizing the flow process that no fixed anchor point switches, use the forwarding tunnel between the ILCR to carry out data forwarding, and initiate the scene that the forwarding tunnel between ILCR is set up by target ILCR, concrete steps are as follows:

Step 601,602 is with step 501,502;

D601, D602, same D501, D502.

In the data message process of transmitting, source AGW reports, upgrades Correspondent Node information to terminal attaching ILR, and optionally safeguards, upgrades local Correspondent Node information of preserving.

Step 603, after source AGW received target access gateway grappling DPF handoff trigger message, when perhaps the AGW reorientation was initiated in AGW decision in source, source AGW sent grappling DPF handoff request message to target AGW, needed to carry the identification information of source ILCR in the message;

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

Step 604 is with step 504;

Step 605, target AGW select target ILCR initiates the tunnel to target ILCR and sets up flow process, simultaneously source ILCR identification information is notified to target ILCR;

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

Wherein can there be multiple mode in the tunnel between IAD and the 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 then initiates to transmit the flow process of setting up in tunnel according to the identification information of the source ILCR that obtains to source ILCR in step 605;

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

Wherein can there be multiple mode in the tunnel between the 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 shown in D603, D604.

D603, the downlink data message path.After source ILCR receives that Correspondent Node is issued the terminal data message, be transmitted to target ILCR by transmitting the tunnel, target ILCR is transmitted to target AGW again, target AGW peels off the RID that encapsulates in this data message, after reverting to the form of the data message that Correspondent Node sends, target access gateway with this message by mailing to this terminal with the terminal data passage.

D604, same D504.

If step 606 and step 605 executed in parallel, it is the tunnel of setting up simultaneously in the tunneling process of target ILCR between foundation and target AGW between the ILCR, step 606 may be finished before step 605, this moment downlink data message need be on target ILCR first buffer memory, treat to be handed down to target AGW again after step 605 is finished.And the same D602 in uplink data messages path of this moment is just encapsulated and decapsulation the data message by target AGW this moment.In the data message process of transmitting, target AGW reports, upgrades Correspondent Node information to terminal attaching ILR, and optionally safeguards, upgrades local Correspondent Node information of preserving.

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

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

At this moment, may also can have the data message of transmitting by source ILCR, this be since also fail to give notice gateway that Correspondent Node inserts 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 and source ILCR are inequality, then carry out this step.

Step 616 is with step 514;

In the present embodiment, after the tunnel between target AGW and target ILCR was set up, uplink data messages was promptly transmitted from this tunnel, as D604, D606.Optionally, this moment, uplink data messages also can be transmitted from the tunnel between target AGW and the source AGW, and promptly data message is forwarded to source AGW from target AGW, arrives source ILCR again; Perhaps transmit from the forwarding tunnel between target ILCR and source ILCR.

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

Embodiment three

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

Step 701 is with step 601;

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

Step 702, when target AGW prepared to initiate the AGW reorientation, select target ILCR sent grappling DPF handoff trigger message to source AGW, and carry target ILCR identification information in message;

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

Step 703, after source AGW receives target AGW grappling DPF handoff trigger message, and agree to carry out grappling DPF when switching, go out needs as if identification information judgment and stride the switching of ILCR (inequality) as source ILCR and target ILCR according to target ILCR, send the ILCR handoff request to source ILCR, carry target ILCR identification information simultaneously; Otherwise execution in step 703 to 705;

Step 704, source ILCR initiates to transmit the flow process of setting up in tunnel according to the identification information of the target ILCR that obtains to target ILCR in step 703;

Wherein can there be multiple mode in the tunnel between the 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 the ILCR handoff response to source AGW;

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

D703, the downlink data message path: after source ILCR receives that Correspondent Node is issued the terminal data message, be transmitted to target ILCR by transmitting the tunnel, this moment downlink data message need be on target ILCR first buffer memory.

D704, same D702.Just by target AGW the data message is encapsulated and decapsulation this moment.

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

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

D705, same D603.The downlink data message that is buffered in D703 on the target ILCR also needs to be transmitted at this moment 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 was set up, uplink data messages was promptly transmitted from this tunnel, as D706, D708.Optionally, this moment, uplink data messages also can be transmitted from the tunnel between target AGW and the source AGW, and promptly data message is forwarded to source AGW from target AGW, arrives source ILCR again; Perhaps transmit from the forwarding tunnel between target ILCR and source ILCR.

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

In the switching flow in the system one, AGW changes, not necessarily can cause the variation of ILCR, therefore source AGW need be according to target ILCR identification information, and perhaps target AGW need judge whether to take place the variation of ILCR according to source ILCR identification information, when ILCR does not change, source ILCR and target ILCR unification, do not exist the tunnel between source ILCR and the target ILCR this moment, do not need to set up, delete tunnel between the two.

System two

The Wimax network architecture that native system is used above-mentioned identify label and position isolation technics still shown in Fig. 4 a, comprises access business network (W-ASN) and is connected business network (W-CSN) that W-NSP also is identical with the functional module that W-CSN comprises.Connect in the business network and also comprise identity position core router (ILCR), each ILCR and support by the RID route and transmit between the broad sense Forwarding plane of data message to have data-interface, but the ILCR among the AGW among the W-CSN and the W-NSP is with to realize that identify label separates relevant function with the position different with embodiment one.

In the 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, the data message is carried out RID encapsulation and decapsulation, and the route and the forwarding that realize data message according to RID.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 register, delete the AID-RID map information to ILR.

ILR, be arranged in W-CSN, be used to receive 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 reception is to the query requests of terminal RID, the RID of this terminal AID correspondence in the request is returned to query requests side, and receive that the gateway that inserts to all Correspondent Nodes of this terminal after the triggering of upgrading Correspondent Node sends the RID update notification.

With switch relatively (corresponding embodiment four to ten if no special instructions)

Described ILR is used to register, the RID of cancellation, inquiry terminal, and receives that the gateway that inserts to all Correspondent Nodes of this terminal after the triggering message of upgrading Correspondent Node sends the RID update notification.

Particularly,

Described AGW comprises:

Cut out control module, be used for sending the AGW handoff request, after switching is finished, be released to the resource that cuts out terminal distribution to target AGW;

The incision control module, be used for after receiving the AGW handoff request, select target ILCR, target ILCR and source ILCR not simultaneously notification target ILCR the terminal incision is arranged and carries the AID of incision terminal, and and this target ILCR between set up this tunnel when not setting up the tunnel that this incision terminal data message transmits, also be used for sending the AGW handoff response to this source AGW;

The control module that cuts out among the described AGW is grappling datapath function (DPF) handoff request to the AGW handoff request that target AGW sends; Incision control module among the described AGW is a grappling DPF handoff response to the AGW handoff response that source AGW sends.

Packet forwarding module is used for the data message of cutting, cut out terminal is transmitted processing.

Described ILCR comprises:

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

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

The RID distribution module is used for distributing the notice back to point to the new RID of this ILCR for this terminal distribution receiving, preserves the map information of this terminal AID and this new RID;

Packet forwarding module is used for the data message of cutting, cut out terminal is transmitted processing;

Described AGW or ILCR also comprise:

The RID Registering modules is used for initiating the RID register flow path after the registration notification of the incision control module of receiving AGW or ILCR, send register requirement and carry the AID of this incision terminal and new RID to incision terminal attaching identity location register (ILR);

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

Described ILR comprises:

The location registration process module is used for after the register requirement of receiving ILCR or AGW, the AID of register update terminal and the correspondence relationship information of RID;

The RID update module, be used for triggering message and initiate more new technological process of RID according to the renewal Correspondent Node of receiving, the gateway that inserts to all Correspondent Nodes of this terminal sends the RID update notification, carry the AID of this terminal and new RID, particularly, the RID update module is being initiated RID more during new technological process, determine the gateway that described Correspondent Node inserts according to the map information of Correspondent Node AID-RID, local configuration information or DNS inquiry, the gateway that inserts to described Correspondent Node sends the 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 register requirement 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 be used for sending Correspondent Node information transmission request to terminal attaching ILR, wherein carry this link information maintenance module and also be not updated to the terminal of terminal attaching ILR and the link information of Correspondent Node, and notify this link information maintenance module to stop maintenance the link information that cuts out terminal;

Further, (corresponding embodiment four, five, six, seven)

The link information maintenance module is in ILCR the 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 purpose ILCR, wherein this source AGW sends this switching notice to this source ILCR after receiving the handoff response that this purpose AGW sends; This purpose ILCR sends this switching notice to this source ILCR after setting up the tunnel with this purpose AGW;

Described ILCR also comprises the map information maintenance module, is used for reporting, upgrading to terminal attaching ILR the AID-RID map information of the Correspondent Node of this terminal, 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 to terminal attaching ILR and also carries this map information maintenance module in the Correspondent Node information transmission request and also be not updated to the map information of the Correspondent Node of terminal attaching ILR, and notifies this map information maintenance module to stop maintenance to the map information that cuts out the terminal communication opposite end;

Also carry the map information that this map information maintenance module also is not updated to the Correspondent Node of terminal attaching ILR in the RID register requirement that described RID Registering modules sends.

Further, (corresponding embodiment eight, nine, ten)

The link information maintenance module is in AGW the 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, after terminal attaching ILR sends Correspondent Node information transmission request, sends switching notice to source ILCR;

ILCR cuts out control module, after receiving the switching notice of source AGW transmission, send Correspondent Node information transmission request to terminal attaching ILR, wherein carry this map information maintenance module and also be not updated to the map information of the Correspondent Node of terminal attaching ILR, and notify this map information maintenance module to stop maintenance the map information that cuts out the 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 comprises that also the tunnel sets up module; The incision control module of described AGW is also set up module to this tunnel and is sent tunnel foundation notice behind select target ILCR; Described tunnel is set up module and is used for after receiving that notice is set up in the tunnel, sets up flow process by the tunnel and is the dynamic tunnel between the foundation of incision terminal and this target ILCR; Perhaps

Described AGW comprises that also the tunnel sets up module, described tunnel set up module be used for the back that powers on set up and ILCR between static tunnel; Target ILCR is according to notice or the AID by checking that data message is known to be had the terminal switching and obtain this terminal of target AGW.

Further, (mapping mode of corresponding embodiment four, eight need not to set up downlink dedicated and transmits the tunnel)

Described RID Registering modules is arranged in ILCR, and after the incision control module of described ILCR was received the new RID of incision terminal that the RID distribution module returns, ILR sent the RID register requirement to this incision terminal attaching;

In the handoff procedure, issuing that the packet forwarding module among the described ILCR will be received is transmitted to source AGW after the data message that cuts out terminal is separated the RID encapsulation; Be transmitted to target AGW after the data message of receiving of issuing the incision terminal separated RID encapsulation;

After packet forwarding module among the described AGW is received and is issued the data message that cuts out terminal, by and target AGW between the forwarding tunnel be forwarded to this target AGW; Receive issue the 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 descending forwarding tunnel, and source ILCR stops decapsulation according to notice, corresponding embodiment four, five, eight conversion)

Module is set up after the tunnel foundation notice of receiving at the incision terminal in tunnel among the described AGW, and sets up or select first tunnel and second tunnel for the incision terminal between this target ILCR;

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

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

Among the described ILCR cut out the switching notice that control module receives that target ILCR or source AGW send after, notify the packet forwarding module among the described ILCR to stop the data message that cuts out terminal is carried out decapsulation.

Further, (target AGW and target ILCR set up descending forwarding tunnel, carry out decapsulation by source ILCR always, corresponding embodiment four, five, eight conversion)

After packet forwarding module among the described ILCR is received and issued the data message that cuts out terminal, this data message is separated the RID encapsulation and is transmitted to source AGW; Be transmitted to target AGW by second tunnel after receiving the data message of the incision terminal of sending from first tunnel; Separate the RID encapsulation after receiving the data message of the incision terminal of sending from the broad sense Forwarding plane, be transmitted to target AGW by second tunnel;

Packet forwarding module among the described AGW is forwarded to this target AGW after receiving and issuing the data message that cuts out terminal; The source AGW of receiving is forwarded to target ILCR by described first tunnel after issuing the data message of incision terminal; Receive target ILCR issue the 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 among the described ILCR between source, target ILCR set up, be transmitted to source AGW again after the data message of receiving of issuing this terminal separated RID encapsulation, the data message of issuing this terminal that will receive after described forwarding tunnel is set up directly is forwarded to this target ILCR by this forwarding tunnel; The data message of issuing the incision terminal that forwarding tunnel between source, target ILCR will be received before setting up directly is transmitted to this target AGW; After setting up in the forwarding tunnel between source, target ILCR, with the data message of receiving of issuing the incision terminal separate transmit again after the RID encapsulation or buffer memory after be transmitted to this target AGW again;

Packet forwarding module among the 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 the incision terminal data message after, by and this incision terminal between data channel send to this incision terminal.

Further,

Incision control module among the described AGW also is used for the identification information of target ILCR is sent to source AGW; The identification information that cuts out the target ILCR different with source ILCR that control module also is used for target AGW is sent among the described AGW sends to source ILCR; Tunnel among the described ILCR set up module according to the identification information of target ILCR be cut out that terminal is set up and target ILCR between the forwarding tunnel; Perhaps

The control module that cuts out among the described AGW also is used for the identification information of source ILCR is sent to target AGW; The identification information that incision control module among the described AGW also is used for the source ILCR that is different from target ILCR that source AGW is sent sends to target ILCR; Tunnel among the described ILCR set up that module is set up for the incision terminal according to the identification information of source ILCR and source ILCR between the forwarding tunnel.

Further,

The data message forwarding that the incision terminal that packet forwarding module among the described AGW will be received sends is to source AGW; With cutting out of sending of the target AGW data message forwarding that terminal sends to source ILCR; And the data message that cuts out the terminal transmission that the packet forwarding module among the described ILCR is sent source AGW carries out the RID encapsulation and is forwarded to the broad sense Forwarding plane; Perhaps

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

Further,

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

Further,

Described RID Registering modules is arranged in ILCR; Incision control module among the described ILCR sends registration notification and carries the AID of this incision terminal and new RID to the RID Registering modules after the RID distribution module sends the distribution notice and is retrieved as the new RID of incision terminal distribution; Perhaps

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

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 four

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

Step 801 is with step 501;

D801, the downlink data message path: source ILCR receives that Correspondent Node issues the terminal data message, peel off the RID that encapsulates in this data message, after reverting to 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 the target AGW with data message forwarding to target AGW, target access gateway with this message by mailing to this terminal with the terminal data passage.

D802, the uplink data messages path: terminal sends the upstream data literary composition to target BS, target BS is given target AGW with data message forwarding, target AGW gives source AGW by the data channel between source AGW and the target AGW with data message forwarding, source AGW is transmitted to source ILCR again, the AID of ILCR obtaining communication opposite end, source, and the AID-RID map information in the inquiry local cache, as find the RID of Correspondent Node, then with the RID of this Correspondent Node as destination address, the RID of this terminal is encapsulated in this data message as source address, and the data message forwarding after will encapsulating then is to the broad sense Forwarding plane; As not finding the RID of Correspondent Node, be forwarded to the mapping Forwarding plane after data message done tunnel encapsulation, and to the RID of ILR query communication opposite end.Perhaps data message is cached to this locality, after waiting to obtain the RID of Correspondent Node, again with the RID of this Correspondent Node as destination address, the RID of this terminal is as source address, be encapsulated in this data message, the data message forwarding after will encapsulating then is to the broad sense Forwarding plane.

In the data message process of transmitting, source ILCR reports, upgrades Correspondent Node information to terminal attaching ILR, and optionally safeguards, upgrades local Correspondent Node information of preserving.

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

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

Step 804, target AGW select target ILCR initiates to transmit the tunnel to target ILCR and sets up flow process, and being used between foundation and the target ILCR transmits from the private downlink of this terminal downlink data message of source ILCR and transmits the tunnel, carries 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 transmits the downlink data that source AGW comes.In addition, if step 802 is not carried out, target AGW need be at the select target ILCR of this step elder generation.

Wherein can there be multiple mode in the tunnel between IAD and the 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 the tunnel to target ILCR and sets up flow process;

Step 805a, target ILCR are the new RID of this terminal distribution, and preserve this terminal of renewal AID-RID map information in this locality;

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

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

D804, the uplink data messages path: terminal sends the upstream data literary composition to target BS, target BS is given target AGW with data message forwarding, target AGW is transmitted to target ILCR again, the AID of target ILCR obtaining communication opposite end, and the AID-RID map information in the inquiry local cache, as find the RID of Correspondent Node, then with the RID of this Correspondent Node as destination address, the RID of this terminal is as source address, be encapsulated in this data message, the data message forwarding after will encapsulating then is to the broad sense Forwarding plane; As not finding the RID of Correspondent Node, be forwarded to the mapping Forwarding plane after data message done tunnel encapsulation, and to the RID of ILR query communication opposite end.Perhaps data message is cached to this locality, after waiting to obtain the RID of Correspondent Node, again with the RID of this Correspondent Node as destination address, the RID of this terminal is as source address, be encapsulated in this data message, the data message forwarding after will encapsulating then is to the broad sense Forwarding plane.

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

Step 806, target ILCR initiates the RID register flow path to terminal attaching ILR after distributing new RID, bring ILR with newly assigned RID, upgrades ILR and goes up terminal AID-RID map information;

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

Step 807, after ownership ILR receives the RID register requirement of target ILCR, the legitimacy of checking AID, and the map information of the current AID-RID of preservation terminal;

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

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

D806, the uplink data messages path.Same D804.

In the data message process of transmitting, target ILCR reports, upgrades Correspondent Node information to terminal attaching ILR, and optionally safeguards, upgrades local Correspondent Node information of preserving.

At this moment, may also can have the data message of transmitting by source ILCR, this be since also fail to give notice ILCR that Correspondent Node inserts 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, finishes the switching of AGW.

Step 809, source AGW initiates switching notice to source ILCR, and notification source ILCR switching is finished, and triggers source ILCR notice ILR and initiates to upgrade the 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 the local Correspondent Node information of preserving, then the information that will not report is carried at reporting terminal ownership ILR in the message, and this ILR preserves the information of the Correspondent Node of receiving.If preserved Correspondent Node AID-RID map information among the terminal attaching ILR, then source ILCR reports the link information that comprises terminal and Correspondent Node in the Correspondent Node information of terminal attaching ILR, Correspondent Node AID-RID map information in this step; Otherwise, only need the link information of reporting terminal and Correspondent Node.

Step 811, the ILCR that terminal attaching ILR notifying communication opposite end is inserted is new terminal AID-RID map information more;

Step 812 after terminal attaching ILR finishes the Correspondent Node renewal, is responded Correspondent Node information to source ILCR and is transmitted response message, and notification source ILCR Correspondent Node upgrades to be finished;

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

Terminal attaching ILR also can be after step 810 execution in step 812 immediately, needn't waiting step 811 finish, this moment, the implication of step 812 was that ILR is to receiving the affirmation of source ILCR message.After ILR execution of step 811, send the renewal Correspondent Node can for again source ILCR and finish message, source ILCR also can send message for subsequently source AGW again.

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

This step can start in step 808 back, also can receive ILR finish 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, initiate the release in tunnel behind the timer expiry again after step 808 or step 813.

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

Step 816, the descending forwarding tunnel between target AGW release and target ILCR;

Step 817, target AGW initiates context report flow process to target BS, and new AGW is issued 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 the tunnel when successfully set up, therefore source ILCR issues the data message of terminal for the Correspondent Node of receiving, can carry out the RID decapsulation all the time, this moment, target ILCR was with no longer decapsulation, as D803.Optionally, also can set up, use the forwarding tunnel between target AGW and the target ILCR this moment, directly uses target AGW and the direct tunnel of source AGW to carry out data forwarding, as D801.Optionally, after the tunnel between target AGW and the target ILCR is set up successfully, target AGW can stop the decapsulation of downlink message by source AGW notification source ILCR, after this downlink data message path is: after source ILCR receives that Correspondent Node is issued the data message of terminal, be transmitted to source AGW, source AGW gives target AGW by the data channel between source AGW and the target AGW with data message forwarding, target AGW transmits the tunnel by private downlink again and issues target ILCR, target ILCR peels off the RID that encapsulates in this data message, after reverting to 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 with this message by mailing to this terminal with the terminal data passage.

In the present embodiment, after the tunnel between target AGW and target ILCR was set up, uplink data messages was promptly transmitted from this tunnel, as D804, D806.Optionally, this moment, uplink data messages also can be transmitted from the tunnel between target AGW and the source AGW, and promptly data message is forwarded to source AGW from target AGW, arrives source ILCR again.

In the present embodiment, source AGW just triggers source ILCR notice ILR in step 809 and initiates ILR renewal Correspondent Node flow process, optionally, step 809 also can advance to step 803 carries out simultaneously, in this case, after terminal attaching ILR receives the Correspondent Node information transmission request of source ILCR, do not start the more new technological process of Correspondent Node, wait to receive after RID registers and restart.

In the present embodiment, the mode of the RID of target ILCR obtaining communication opposite end is identical with the mode cardinal principle of AGW obtaining communication opposite end RID in the system one, only the executor need be become 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.

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

D1601 is peelled off the RID that encapsulates in this data message by ILCR;

D1602, by the AID of ILCR obtaining communication opposite end, the line data message of going forward side by side encapsulation;

Step 1602,1603, by being that the ILCR of this Terminal Service is in the transceive 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 handled 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 the notice of receiving Correspondent Node ownership ILR, upgrade the local Correspondent Node AID-RID map information of preserving, if in step 1604, Correspondent Node AID-RID map information is reported to ownership ILR, then also needs to notify this terminal attaching ILR to upgrade the AID-RID map information of this Correspondent Node this moment.After the correspondence disconnection or a certain Correspondent Node off-line of terminal and a certain Correspondent Node, the map information of ILCR notice terminal attaching ground ILR deletion related communication opposite end.

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

Embodiment five

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

Step 901-902 is with step 801-802;

D901, D902, same D801, D802.

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

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

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

Step 906, target ILCR is according to the source ILCR identification information that obtains in step 904 or 905, if source ILCR and target ILCR are inequality, then initiate switching notice to source ILCR, notification source ILCR switches, triggering source ILCR notice ILR initiates to upgrade the 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 for target ILCR;

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

D903, the downlink data message path is: after source ILCR receives that Correspondent Node is issued the data message of terminal, be transmitted to source AGW, source AGW gives target AGW by the data channel between source AGW and the target AGW with data message forwarding, target AGW transmits the tunnel by private downlink again and issues target ILCR, target ILCR peels off the RID that encapsulates in this data message, after reverting to 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 with this message by mailing to this terminal with the 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 also can be carried out in step 910 back to 909 in the present embodiment.

In the present embodiment, after the tunnel between target AGW and target ILCR was set up, uplink data messages was promptly transmitted from this tunnel, as D904, D906.Optionally, this moment, uplink data messages also can be transmitted from the tunnel between target AGW and the source AGW, and promptly data message is forwarded to source AGW from target AGW, arrives source ILCR again.

Embodiment six

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

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

D1001, D1002, same D901, D902.

Step 1004 is with step 905;

Step 1005, target ILCR is according to the identification information of the source ILCR that obtains in step 1004, if target ILCR and source ILCR are inequality, then initiates to transmit the flow process of setting up in tunnel to source ILCR;

Step 1004a is with step 905a;

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

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

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

D1004, same D904.

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

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 also can be carried out in step 1010 back to 1009 in the present embodiment.Perhaps execution in step 1006 to 1009 not, in step 1013 or 1003 back execution in step 809 to step 813.

In the present embodiment, after the tunnel between target AGW and target ILCR was set up, uplink data messages was promptly transmitted from this tunnel, as D1004, D1006.Optionally, this moment, uplink data messages also can be transmitted from the tunnel between target ILCR and the source ILCR.

Embodiment seven

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

Step 1101 is with step 1001;

D1101, D1102, same D1001, D1002.

Step 1102, when target AGW prepared to initiate the AGW reorientation, select target ILCR sent grappling DPF handoff trigger message to source AGW, and carry target ILCR identification information in message;

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

Source AGW goes out the switching that needs are striden ILCR as if the identification information judgment according to target ILCR, sends the ILCR handoff request to source ILCR, carries target ILCR identification information simultaneously; Otherwise execution in step 1103-1105 not.

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

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

D1104, same D1102.

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

Step 1107, target AGW initiates the tunnel to target ILCR and sets up flow process.In tunnel establishment procedure, target ILCR may need to finish authentication alternately with the ownership aaa server.Wherein can there be multiple mode in the tunnel between IAD and the 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 is with step 1004a;

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

D1105, same D1003.The downlink data message that is buffered in D1103 on the target ILCR also needs to be transmitted at this moment 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 simultaneously with step 1106, in this case, and after terminal attaching ILR receives the Correspondent Node information transmission request of source ILCR, do not start the more new technological process of Correspondent Node, wait to receive after RID registers and restart.

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

In the present embodiment, after the tunnel between target AGW and target ILCR was set up, uplink data messages was promptly transmitted from this tunnel, as D1106, D1108.Optionally, this moment, uplink data messages also can be transmitted from the tunnel between target ILCR and the source ILCR.

Embodiment eight

Figure 12 is applicable to the scene in the forwarding tunnel between the forwarding of data use IAD in the 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 behind step 1205a, need set up the newly assigned RID of target ILCR and bring target AGW in the flow process in the tunnel.

D1203, D1204, same D803, D804;

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

Step 1206, target AGW initiates the RID register flow path to terminal attaching ILR after receiving newly assigned RID, bring ILR with newly assigned RID, upgrades ILR and goes up terminal AID-RID map information;

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

If also have the not information of reporting terminal ownership ILR in the local Correspondent Node information of preserving, then the information that will not report is carried at reporting terminal ownership ILR in the message, and 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 the local Correspondent Node information of preserving, then the information that will not report is carried at reporting terminal ownership ILR in the message, and 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, source AGW sends switching notice for source ILCR;

If preserved Correspondent Node AID-RID map information among the terminal attaching ILR, then source AGW need trigger source ILCR to reporting this information of ILR.

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

Step 1212, the ILCR that the method notifying communication opposite end that terminal attaching ILR uses ILR to upgrade Correspondent Node is inserted is new terminal AID-RID map information more;

Step 1213-step 1214 after terminal attaching ILR finishes the Correspondent Node renewal, is responded Correspondent Node information to source ILCR and is transmitted response message, and source ILCR closes AGW to the source again and responds switch acknowledgment message;

Step 1215 after terminal attaching ILR finishes the Correspondent Node renewal, is responded Correspondent Node information to source AGW and is transmitted response message;

Terminal attaching ILR also can be after step 1209,1211 execution in step 1215,1213 immediately, needn't waiting step 1212 finish, this moment, step 1213,1215 implication were that ILR is to receiving the affirmation of source ILCR, source AGW message.After ILR execution of step 1212, send the renewal Correspondent Node can for again source ILCR, source AGW and finish 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 the tunnel when successfully set up, therefore source ILCR issues the data message of terminal for the Correspondent Node of receiving, can carry out the RID decapsulation all the time, this moment, target ILCR was with no longer decapsulation, as D1203.Optionally, also can set up, use the forwarding tunnel between target AGW and the target ILCR this moment, directly uses target AGW and the direct tunnel of source AGW to carry out data forwarding, as D1201.Optionally, after the tunnel between target AGW and the target ILCR is set up successfully, target AGW can stop the decapsulation of downlink message by source AGW notification source ILCR, after this downlink data message path is: after source ILCR receives that Correspondent Node is issued the data message of terminal, be transmitted to source AGW, source AGW gives target AGW by the data channel between source AGW and the target AGW with data message forwarding, target AGW transmits the tunnel by private downlink again and issues target ILCR, target ILCR peels off the RID that encapsulates in this data message, after reverting to 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 with this message by mailing to this terminal with the terminal data passage.

In the present embodiment, after the tunnel between target AGW and target ILCR was set up, uplink data messages was promptly transmitted from this tunnel, as D1204, D1206.Optionally, this moment, uplink data messages also can be transmitted from the tunnel between target AGW and the source AGW, and promptly data message is forwarded to source AGW from target AGW, arrives source ILCR again.

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

In the present embodiment, in the mode of the RID of target ILCR obtaining communication opposite end and the system two among other embodiment target ILCR to close the mode of obtaining communication opposite end RID identical.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 safeguard that according to the real-time testing result notice of stream AGW perhaps AGW oneself detects and safeguards by ILCR in the present embodiment.

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

D1601 is peelled off the RID that encapsulates in this data message by ILCR;

Step 1602,1603, by be the ILCR of this Terminal Service in the transceive 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 the link information (being the AID map information of terminal and Correspondent Node) of notice IAD preservation terminal and Correspondent Node; The IAD that perhaps is this Terminal Service is found new Correspondent Node in the transceive data process, 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 need report the AID-RID map information of Correspondent Node to terminal attaching ILR, then AGW sends message to IICR, triggers ILCR and reports the Correspondent Node AID-RID map information that does not report ILR to terminal attaching ILR.

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

Handle the terminal of local cache and the link information of Correspondent Node by AGW.

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

In the switching flow of embodiment eight to embodiment ten, the method for terminal attaching ILR renewal Correspondent Node is identical with the method among the embodiment four to embodiment seven.

Embodiment nine

Figure 13 is applicable to the forwarding tunnel between the forwarding of data use ILCR in the handoff procedure, and is initiated to transmit the scene that the tunnel is set up between ILCR by target ILCR, 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 is with step 1205b;

Step 1305 is 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 was set up, uplink data messages was promptly transmitted from this tunnel, as D1304, D1306.Optionally, this moment, uplink data messages also can be transmitted from the tunnel between target AGW and the source AGW, and promptly data message is forwarded to source AGW from target AGW, arrives source ILCR again.

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

Embodiment ten

Figure 14 is applicable to the forwarding tunnel between the data forwarding use ILCR in the handoff procedure, and is initiated to transmit the scene that the tunnel is set up between ILCR by source ILCR, 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 is 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 was set up, uplink data messages was promptly transmitted from this tunnel, as D1406, D1408.Optionally, this moment, uplink data messages also can be transmitted from the tunnel between target AGW and the source AGW, and promptly data message is forwarded to source AGW from target AGW, arrives source ILCR again.

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

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

Fig. 5-embodiment one to embodiment ten shown in Figure 14 is that example is set forth switching flow there to be dynamic tunnel between AGW and the ILCR all, the various embodiments described above also go for being between AGW and ILCR the scene in static tunnel, this moment is in handoff procedure, no longer need to set up dynamic tunnel between target AGW and target ILCR, success has been created in tunnel between the two when both power on, other steps are identical.After target AGW has selected target ILCR, can utilize between the two tunnel notification target ILCR to have terminal to switch and the AID of this terminal is sent to target ILCR, or target ILCR is known the AID that has terminal to switch and obtain this terminal by checking data message.

System three

Fig. 4 b is the schematic diagram of the network architecture of using the another kind of Wimax system of above-mentioned identify label and position isolation technics, and solid line is represented the connection of loading end among the figure, and dotted line is represented the connection of chain of command.This Wimax network architecture comprises access business network (W-ASN) and is connected business network (W-CSN).Have the data surface interface between W-ASN and the broad sense Forwarding plane, be expressed as the D1 interface.Also can have the data surface interface between W-CSN and the broad sense Forwarding plane, be expressed as D2.The broad sense Forwarding plane can be the packet data network of supporting the RID route and transmitting data message.

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

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

In the present embodiment, there is not ILCR in the WiMAX network, 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, report, upgrade Correspondent Node information to terminal attaching ILR, the data message is carried out RID encapsulation and decapsulation, and realize functions such as the route of data message and forwarding according to RID.

Described ILR is used to receive 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 reception is to the query requests of terminal RID, the RID of this terminal AID correspondence in the request is returned to query requests side, after receiving the triggering message of upgrading Correspondent Node, the gateway that the notifying communication opposite end is inserted is new terminal AID-RID map information more.

With switch relatively:

Described AGW is used for when terminal is cut, and 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 resource to this terminal distribution; And incision, the data message that cuts out terminal transmitted processing;

Particularly,

Described AGW comprises:

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

The RID Registering modules is used for initiating the 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 is used for the data message of incision terminal is carried out the RID encapsulation, separates the RID encapsulation; Receive issue the downlink data message that cuts out terminal after, by and target AGW between the forwarding tunnel be forwarded to this target AGW, receive issue the incision terminal downlink data message the time, send to this terminal by data channel with this terminal; Also be used for parsing the link information of terminal and Correspondent Node, and notice link information maintenance module is safeguarded from the data message of the terminal received;

Described ILR comprises:

The location registration process module is used for after the register requirement of receiving 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 register requirement that message refers to that AGW sends.

Further,

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

Further,

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

Embodiment 11

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

Step 1501 is with step 501;

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

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

D1502, the uplink data messages path: terminal sends the upstream data literary composition to target BS, target BS is given target AGW with data message forwarding, target AGW gives source AGW by the data channel between source AGW and the target AGW with data message forwarding, the AID of AGW obtaining communication opposite end, source, and the AID-RID map information in the inquiry local cache, as find the RID of Correspondent Node, then with the RID of this Correspondent Node as destination address, the RID of this terminal is as source address, be encapsulated in this data message, the data message forwarding after will encapsulating then is to target broad sense Forwarding plane; As not finding the RID of Correspondent Node, be forwarded to the mapping Forwarding plane after data message done tunnel encapsulation, and to the RID of ILR query communication opposite end.Perhaps data message is cached to this locality, after waiting to obtain the RID of Correspondent Node, again with the RID of this Correspondent Node as destination address, the RID of this terminal is as source address, be encapsulated in this data message, the data message forwarding after will encapsulating then is to the 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 shown in D1503, D1504.

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

D1504, the uplink data messages path: terminal sends the upstream data literary composition to target BS, target BS is given target AGW with data message forwarding, the AID of target AGW obtaining communication opposite end, and the AID-RID map information of inquiry in the local cache, as find the RID of Correspondent Node, then with the RID of this Correspondent Node as destination address, the RID of this terminal is encapsulated in this data message as source address, and the data message forwarding after will encapsulating then is to the broad sense Forwarding plane; As not finding the RID of Correspondent Node, be forwarded to the mapping Forwarding plane after data message done tunnel encapsulation, and to the RID of ILR query communication opposite end.Perhaps data message is cached to this locality, after waiting to obtain the RID of Correspondent Node, again with the RID of this Correspondent Node as destination address, the RID of this terminal is as source address, be encapsulated in this data message, the data message forwarding after will encapsulating then is to the broad sense Forwarding plane.

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

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

D1506, uplink data messages path, same D1504.

Before step 1509, may also can have the data message of transmitting by source AGW, this be since also fail to give notice gateway that Correspondent Node inserts more new terminal AID-RID map information cause.At this moment the same D1503 in downlink data message path.

Step 1512 is with step 514;

In the present embodiment, after target AGW received handoff request, uplink data messages was promptly directly transmitted from target AGW, as D1504, D1506.Optionally, this moment, uplink data messages also can be transmitted from the tunnel between target AGW and the source AGW, and promptly data message is forwarded to source AGW from target AGW.

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

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.

AGW reports, upgrades the method homology of Correspondent Node information to ILR and reports, upgrades the method for Correspondent Node information to ILR in unified in the present embodiment, 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.

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

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

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

Claims

1. the changing method of the no fixed anchor point of a Wimax system is characterized in that, this method comprises:

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. as claim 2,3 or 4 described changing methods, it 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 method as claimed in claim 1 is characterized in that, in this handoff procedure:

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

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

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

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

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

17. changing method as claimed in claim 1 is characterized in that, the mode of this target AGW select target ILCR is a kind of in the 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 networking, the terminal attaching aaa server allows the ILCR that inserts directly or by the visit aaa server to be notified to this source AGW this terminal, source AGW allows the ILCR that inserts to be notified to this target AGW this terminal 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.

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

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

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

This source AGW is grappling datapath function (DPF) handoff request to the AGW handoff request that this target AGW sends;

This target AGW is a grappling DPF handoff response to the AGW handoff response that this source AGW sends.

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

22. can realize not having the Wimax system that fixed anchor point switches for one kind, comprise access business network and be connected business network, comprise base station and IAD (AGW) in the access business network, comprise identity location register (ILR) in the described connection business network, it is characterized in that:

Described AGW is used to realize the switching of Wimax access business network (W-ASN) grappling of terminal, and for cutting terminal select target ILCR, and this target ILCR between also set up this tunnel when setting up the tunnel that incision terminal data message transmits, transmit the data message of incision terminal by this tunnel;

23. Wimax as claimed in claim 22 system is characterized in that described AGW comprises:

24. want 23 described Wimax systems as right, it is characterized in that,

Described ILCR comprises:

Described AGW or ILCR also comprise:

Described ILR comprises:

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

25. Wimax as claimed in claim 24 system is characterized in that:

26. Wimax as claimed in claim 24 system is characterized in that:

27. Wimax as claimed in claim 26 system is characterized in that:

The link information maintenance module is in ILCR the 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 purpose ILCR, wherein this source AGW sends this switching notice to this source ILCR after receiving the handoff response that this purpose AGW sends; This purpose ILCR sends this switching notice to this source ILCR after setting up the tunnel with this purpose AGW;

28. Wimax as claimed in claim 26 system is characterized in that:

The link information maintenance module is in AGW the 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;

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

30. Wimax as claimed in claim 24 system is characterized in that:

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

31. Wimax as claimed in claim 24 system is characterized in that:

32. Wimax as claimed in claim 24 system is characterized in that:

33. Wimax as claimed in claim 24 system is characterized in that:

34. Wimax as claimed in claim 24 system is characterized in that:

35. Wimax as claimed in claim 24 system is characterized in that:

Packet forwarding module among the described ILCR will be received and issue the data message that cuts out terminal, before forwarding tunnel between source, target ILCR is set up, be transmitted to source AGW again after the data message of receiving of issuing this terminal separated RID encapsulation, the data message of issuing this terminal that will receive after described forwarding tunnel is set up directly is forwarded to this target ILCR by this forwarding tunnel; The data message of issuing the incision terminal that forwarding tunnel between source, target ILCR will be received before setting up directly is transmitted to this target AGW; After setting up in the forwarding tunnel between source, target ILCR, with the data message of receiving of issuing the incision terminal separate transmit again after the RID encapsulation or buffer memory after be transmitted to this target AGW again;

36. Wimax as claimed in claim 35 system is characterized in that:

37. Wimax as claimed in claim 24 system is characterized in that:

38. Wimax as claimed in claim 24 system is characterized in that, the mode of the incision control module select target ILCR among the described AGW is a kind of in the following mode:

39. Wimax as claimed in claim 24 system is characterized in that:

40. Wimax as claimed in claim 24 system is characterized in that: