CN102123463A

CN102123463A - Wideband code division multiple access (WCDMA) core network and WCDMA core network-based switching method

Info

Publication number: CN102123463A
Application number: CN2010100022464A
Authority: CN
Inventors: 王志海; 吴强; 符涛
Original assignee: ZTE Corp
Current assignee: Jiangsu Dashi Aviation Technology Co ltd
Priority date: 2010-01-12
Filing date: 2010-01-12
Publication date: 2011-07-13
Anticipated expiration: 2030-01-12
Also published as: WO2011085636A1; CN102123463B

Abstract

The invention discloses a wideband code division multiple access (WCDMA) core network and a WCDMA core network-based switching method. In the terminal switching process which relates to serving radio network subsystem (SRNS) repositioning among serving general packet radio service (GPRS) support nodes (SGSNs), if a new SGSN selects a new gateway GPRS support node (GGSN), a packet data protocol (PDP) bearer between the new SGSN and the new GGSN is established for a terminal, and the access identifier (AID) of the terminal is transmitted to the new GGSN; the GGSN allocates a new routing identifier (RID) for the terminal and saves the mapping information of the AID and the new RID of the terminal; the new GGSN or the new SGSN transmits an RID registration request to an identity location register (ILR) to which the terminal belongs and carries the new RID; the ILR to which the terminal belongs updates the saved RID of the terminal; after the switching is finished, the bearer related to the terminal between a former SGSN and the former GGSN is realized; and the terminal is connected to an outside packet data network by the new SGSN and the new GGSN. The WCDMA core network-based switching method can realizes the switching without a fixed anchor point on the basis of the WCDMA core network so as to avoid routing detour.

Description

A kind of WCDMA core net reaches the changing method based on the WCDMA core net

Technical field

The present invention relates in the moving communicating field the WCDMA core net and based on the changing method of WCDMA core net.

Background technology

Existing WCDMA system is current important system and the method that realizes service access based on wireless WCDMA technology.Its core net framework as shown in Figure 1a.Comprise network elements such as the signatory register of service GPRS node (SGSN), critical point GPRS node (GGSN) and home subscriber, in the literary composition home subscriber server (HSS) among attaching position register among the 2G (HLR) and the 3G is referred to as the signatory register of home subscriber, represents with HLR/HSS.

SGSN is the basic composition network element of of GPRS network, is a new network element device of introducing in the GSM network for gprs service is provided.Its significant feature is exactly the IP grouping of transmitting I/O for the MS of this SGSN coverage.

GGSN provides data message in WCDMA net and route and encapsulation between the external data network.Which GGSN the user selects as gateway, is to determine according to user's the CAMEL-Subscription-Information and the Access Point Name of user's request in packet data protocol (PDP:Packet DataProtocol) context activation process.

HLR/HSS storage user's packet domain subscription data and routing iinformation.HLR/HSS can be visited by Gr interface by SGSN, and GGSN is by the Gc interface accessing.For the MS of roaming, HLR/HSS may be in different PLMN with current SGSN.

The WCDMA system has also defined the network architecture in single tunnel simultaneously, shown in Fig. 1 b.This framework is that with the difference of the framework of Fig. 1 a Data-carrying is directly linked to each other with GGSN by RNC, has effectively saved the processing of data message, and the function of SGSN in data forwarding and transportation level that weakened.

Mobile network's a key property is the continuity transmitting-receiving that still keeps professional in the process that terminal continue to move, Here it is handoff functionality.For the WCDMA core net, handoff functionality is realized in the switching flow (Inter-system change) between reorientation flow process and system.

The reorientation flow process is finished the user makes the access path of data in core net change with terminal location in the process of using business datum, thereby guarantees professional continuity.The reorientation flow process is the most complicated flow process in the mobile communication core net.Relate to the function of data forwarding, routing update.

The reorientation flow process is divided into by the scene that takes place:

-SRNS Serving Radio Network Subsystem (SRNS) reorientation;

The direct-cut operation and the SRNS reorientation of-associating;

Sub-district/the URA and the SRNS reorientation of-associating;

-SRNS reorientation cancellation.

Wherein, preceding two kinds by having or not the Iur interface to distinguish between the RNC, be main flow process.What the present invention relates to is second kind.

Be that example is described repositioning process with associating direct-cut operation and SRNS reorientation below, no Iur interface between the RNC, and this process is carried out when MS is in packet domain mobile management-connection (PMM-CONNECTED) state.

When associating direct-cut operation and SRNS repositioning process are used to carry out by the direct-cut operation of UTRAN decision, in the UTRAN side from source RNC to Target RNC, UTRAN is moved to the CN tie point.In this process, Iu links by reorientation.If Target RNC and source RNC are connected on the same SGSN, then the repositioning process of SGSN SRNS inside is performed.If the SGSN that Target RNC is connected to is different with the SGSN that source RNC is connected to, then the SRNS repositioning process between SGSN is performed.Carry out the Routing Area Update process of then carrying out after this process between the SGSN.The present invention pays close attention to is SRNS repositioning process between SGSN.

Fig. 2 a is depicted as when source RNC is connected on the different SGSN with Target RNC, the situation before associating direct-cut operation and SRNS reorientation and Routing Area Update.Fig. 2 b is depicted as the situation after associating direct-cut operation and SRNS reorientation and Routing Area Update are finished.As shown in the figure, before SRNS reorientation and the Routing Area Update, MS is registered among preceding SGSN and the preceding MSC/VLR.Source RNC is as Serving RNC (SRNC).After SRNS reorientation and RA upgraded, MS registered in new SGSN and new MSC/VLR.For new SGSN, MS is in the PMM-CONNECTED state, and for new MSC/VLR, MS is in MM IDLE state, and Target RNC is as Serving RNC.

The associating direct-cut operation in PS territory and the SRNS repositioning process between SGSN comprise reorientation set-up procedure, reorientation implementation and reorientation complete process shown in Fig. 3 a and Fig. 3 b, specific as follows:

Step 301: source RNC initiates the associating direct-cut operation and the SRNS reorientation in PS territory;

Step 302: source RNC gives preceding SGSN (Old SGSN) by sending re-positioning request (Relocation Required) message, initiates the reorientation set-up procedure;

The reorientation type that comprises in this re-positioning request, reason, cell-of-origin ID, Target cell ID, source RNC are to contents such as Target RNC transparent vessels.The reorientation type is set to " relating to UE ".

Step 303: preceding SGSN is the SRNS reorientation between SGSN according to Target cell ID as determining the SRNS reorientation, sends " transmitting re-positioning request (Forward Relocation Required) " message and gives new SGSN, initiates the reorientation resource allocation process;

Step 304a: new SGSN sends RELOCATION REQUEST message to Target RNC; According to the location information of terminals of request reorientation, find the address of corresponding new SGSN,

Comprise in this RELOCATION REQUEST message that permanent NAS UE identifier, reason, CN territory indicating device, source RNC are to the Target RNC transparent vessel and the RAB (RAB) that will be provided with etc.

Step 304b: after Target RNC is accepted resource that RAB is necessary and comprised that Iu user's face becomes the distribution of work, set up the RAB carrying with new SGSN, send re-positioning request and confirm that (Relocation RequestAcknowledge) message gives new SGSN;

Comprise in the re-positioning request acknowledgement message: Target RNC to source RNC transparent vessel, RAB is provided with, is provided with the RAB of failure etc.Transparent vessel comprise that MS switches needs all be complete RRC message (reconfiguring) with wireless relevant information as the physical channel, send to MS pellucidly by CN and source RNC.Target RNC receives the descending PDU of the descending PDU that transmits from source RNC and the SGSN that makes a fresh start for each RAB that will be provided with (by IP address and tunnel endpoint identifier definition).

Step 305: the resource that transmits user data between Target RNC and the new SGSN is distributed, and after the reorientation that new SGSN has been SRNS was ready, new SGSN sent " transmitting relocation response (Forward Relocation Response) " message to preceding SGSN;

Transmit in the relocation response message and comprise: reason, UTRAN transparent vessel, RANAP reason, and Target RNC information.The expression Target RNC has been ready to receive the downlink grouped bag that is not also confirmed by MS from source RNC.So far, the reorientation resource allocation process is successfully terminated.

Step 306: preceding SGSN sends reorientation order (Relocation Command) message and gives source RNC, continues the reorientation of source RNS;

Comprise in the reorientation command messages: Target RNC is to source RNC transparent vessel, the RAB that discharge, and be subjected to the RAB of data forwarding restriction.Before SGSN determine to be subjected to the RAB of data forwarding restriction according to QoS, those RAB should be included among the RAB that is subjected to the data forwarding restriction.

Step 307: after source RNC received the reorientation command messages from the PS territory, the log-on data repeating timer began to transmit data for the RAB that is subjected to the data forwarding restriction;

Data forwarding in the SRNS reorientation should be carried out by the Iu interface, means in the data that exchange between source RNC and the Target RNC and duplicates in the RNC of source and send at IP course Target RNC.

Step 308: when the reorientation set-up procedure is successfully stopped, and source RNC is ready, source RNC by send " Target RNC to source RNC transparent vessel " in the RRC message that provides to MS, the execution of triggering SRNS reorientation.

Above-mentioned RRC message is carried UE information word and CN transparent vessel as being physical channel reconfiguration message (Physical ChannelReconfiguration) in the message.

Step 309: source RNC sends " transmitting SRNS context (Forward SRNS Context) " (RAB context) message to Target RNC through preceding SGSN (old SGSN) and new SGSN (new SGSN), continue to carry out the reorientation of SRNS, confirm (Forward SRNSContext Acknowledge) message confirmation by transmitting the SRNS context;

The purpose of this process is when the switching in CN takes place the SRNS context to be moved to Target RNC from source RNC.Target RNC is reset and is restarted RLC and be connected, and between Target RNC and MS exchange PDCP sequence number (PDCP-SNU, PDCP-SND).

Step 310: Target RNC detects terminal, and when receiving reorientation execution triggering message, Target RNC sends reorientation and detects (Relocation Detect) message to new SGSN;

For the SRNS reorientation type of " UE Involved ", reorientation is carried out triggering message and may be received from the Uu interface.After relocation detect-message was sent out, Target RNC should start the operational mode of SRNC.

Step 311: after terminal reconfigures, send RRC message such as physical channel and reconfigure and finish (Physical Channel Reconfiguration Complete) message or the radio bearer Release complete is given Target RNC, the expression Target RNC can begin and MS exchange grouping bag;

Receive the message of UE transmission when Target RNC after, send reorientation and finish (RelocationComplete) message, initiate the reorientation complete process to new SGSN.

Step 312, new SGSN sends the forwarding reorientation and finishes the preceding SGSN of (Forward Relocation Complete) message informing, the SRNS repositioning process is finished, and preceding SGSN returns the forwarding reorientation and finishes confirmation (Forward Relocation Complete Acknowledge) message to new SGSN;

The purpose of reorientation complete process is to show finishing of SRNS reorientation by Target RNC to CN.If user's face does not also switch in reorientation detects, CN receives and user's face should be switched to Target RNC from source RNC after message is finished in reorientation.

Step 313: after new SGSN receives relocation detect-message, send and upgrade PDP Context request (Update PDP Context Request) message, carry new SGSN address, SGSN endpoint of a tunnel identifier and agreed QoS to relevant GGSN.GGSN upgrades their PDP Context field and returns one and upgrade PDP Context response (Update PDP Context Response) message, carries GGSN endpoint of a tunnel identifier;

Step 314: receive and transmit after reorientation finishes message, preceding SGSN sends Iu release command (IuRelease Command) message and gives source RNC, when RNC data forwarding timer expired, Iu of source RNC response discharged and finishes (Iu Release Complete) message;

After step 315:MS finished the process of reconfiguring, if new Routing Area Identifier and former different, MS can initiate the Routing Area Update process.

The Routing Area Update process is for the MS current position information is registered in new SGSN, and new SGSN information updating in HLR.A subclass of the RA renewal process that the Routing Area Update in this flow process is partly just carried out is because MS is in the PMM-CONNECTED state.

The WCDMA system can provide polytype service application for the user, but also has the problem on a lot of the application, as:

GGSN is constant, exists route circuitous.Terminal is once connecting and is using in the professional process, and GGSN remains unchanged.Under the situation that the user is moved, might move on to the place far and nearer like this, thereby cause the path circuitous apart from service source apart from GGSN.

Use the IP address of static publicly-owned address, can considerable restraint be arranged user's mobility as terminal.Static public ip address can only be from fixing gateway striking out owing to route planning.In case move to far place, can't insert external network nearby.Inevitably cause route circuitous.

The mobile management flow process of carrying out in order to guarantee business continuance is very complicated.Present mobile management flow process is very complicated, shown in each top flow process.Main cause is for guaranteeing business continuance, and IP address of terminal is immutable, and GGSN is immutable, and relevant carrying must have an anchor point.All information of response are all wanted accurate transfer and are built carrying again.

Be in the question essence of above-mentioned existence that the community of the address of TCP/IP and identity causes.In order to address these problems, industry has proposed multiple new mobile management technology at present.Its essential idea is user identity and position isolation technics.Existing relevant identify label separates (SILSN:Subscriber Identifier ﹠amp in the prior art with the position; Locator Separation Network) solution, as Host Based realization such as HIP technology, and based on the realization such as location identity separated protocol (LISP) technology of router, there are relevant multiple technologies to support again in every kind of realization, terminal use's identify label in these schemes (being expressed as AID in the literary composition) does not change in moving process, realizes the route and the forwarding of data message according to the position otherwise allocated station location marker (being expressed as RID in the literary composition) of terminal.

Fig. 4 a shows a kind of identify label separates (SILSN) with the position the network architecture, 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.In the network, AID remains constant in the terminal moving process as the User Identity of terminal; 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.

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.

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, and to the RID of ILR registration and inquiry terminal, and the route of realization data message and forwarding etc.Terminal must insert backbone network through ASN.ASN is the address information that the RID of terminal distribution comprises this ASN, points to this ASN in other words, 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 and safeguard the identify label and the station location marker map information of home subscriber terminal, also be written as the AID-RID map information in the literary composition, handle registration, go registration and inquiry 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 the interface with generic router, ASN and ILR, is used to realize 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.

In the SILSN framework, the form of the data message of transmitting between ASN is for shown in Fig. 4 b.Wherein the source AID of internal layer encapsulation is the AID of terminal, and purpose AID is the AID of Correspondent Node, and source RID is the RID of terminal, and purpose RID is the RID of Correspondent Node.The RID of terminal is used to be addressed to the ASN that this terminal inserts, and the RID of Correspondent Node is used to be addressed to the ASN that Correspondent Node inserts.Two layers of header are the encapsulation of carrying out when between two ASN the tunnel being arranged.

When communicating in the SILSN framework, ASN receives that uplink data messages will carry out RID encapsulation and transmit.Particularly, ASN is at the RID of local search Correspondent Node, as inquires, with the RID of Correspondent Node as destination address, with terminal RID is that source address is encapsulated in the data message that comprises terminal AID and Correspondent Node AID, is forwarded to the ASN that Correspondent Node inserts through the broad sense Forwarding plane.As inquiry less than, arrive Correspondent Node and belong to ILR and inquire the RID of Correspondent Node and be kept at this locality.At this moment, after the RID of terminal can be encapsulated, be forwarded to the broad sense Forwarding plane by the mapping Forwarding plane, perhaps in message, after inquiring the RID of Correspondent Node, carry out the RID encapsulation and transmit and handle in the mode of local search during by above-mentioned by this ASN again to the RID of Correspondent Node.At down direction, ASN separates the RID encapsulation after receiving the data message that the broad sense Forwarding plane sends, and sends to terminal after peelling off RID wherein.

As can be seen, ASN need be this terminal distribution RID, and need to register this RID to ILR, to upgrade the RID of this terminal among the ILR in order to realize the normal forwarding of message when terminal inserts.ASN also needs the AID-RID map information of maintenance terminal and Correspondent Node thereof, realizes the RID encapsulation to message.In one example, ASN (also can be described as the link information of terminal and Correspondent Node for what each terminal was safeguarded this terminal to client information, or the correspondence information of terminal and Correspondent Node), the correspondence relationship information that wherein comprises this terminal AID and Correspondent Node AID thereof is as preserving the AID of terminal and Correspondent Node thereof in the table of opposite end.The AID-RID map information that can also comprise this terminal, simultaneously, the unified AID-RID map information of safeguarding the Correspondent Node of all terminals of ASN.Certainly, ASN safeguards respectively that for each terminal the AID-RID map information of its all Correspondent Nodes also is fine.

The framework of this SILSN framework and existing WCDMA has a lot of similarities on using, such as being connected with traditional IP, borde gateway is to the inquiry and the authentication process of the processing of data message forwarding, data message form, signaling, processing of mobile management or the like aspect.Therefore the SILSN framework applications mobile management and service access can be realized in existing WCDMA core net, the problems referred to above that WCDMA exists can be solved effectively.

But, prior art for how in the handoff procedure of WCDMA system the identify label of support terminal separate with the position, it is circuitous to avoid occurring route, does not all propose corresponding implementation.

Summary of the invention

The technical problem to be solved in the present invention provides a kind of WCDMA core net and based on the changing method of WCDMA core net, can avoid route circuitous.

In order to solve the problems of the technologies described above, the invention provides a kind of changing method based on the WCDMA core net, comprising:

In the terminal switching process that relates to SRNS Serving Radio Network Subsystem between SGSN (SRNS) reorientation, new SGSN has been as having selected new critical point GPRS node (GGSN), then sets up for this terminal that PDP between new SGSN and this new GGSN carries and sends the AID of this terminal to this new GGSN;

This new GGSN is the new station location marker of this terminal distribution (RID), and preserves the map information of this terminal identity sign (AID) and this new RID;

This new GGSN or new SGSN send the RID register requirement to this terminal attaching identity location register (ILR), carry this new RID, and this terminal attaching ILR upgrades the RID of this terminal of preserving;

Switch finish after, the relevant carrying of this terminal between SGSN and preceding GGSN before discharging, this terminal is connected to the packet data network of outside by new SGSN and new GGSN.

Further, above-mentioned changing method also can have following characteristics:

SGSN in this WCDMA core net be responsible for safeguarding this terminal to client information, comprise the correspondence relationship information of this terminal AID and Correspondent Node AID thereof;

In this handoff procedure, this terminal that this preceding SGSN also will safeguard client information is sent to this new SGSN; Preceding SGSN or new SGSN find the address information of the gateway of Correspondent Node access according to the AID to Correspondent Node in the client information of this terminal, and the gateway that inserts to described Correspondent Node sends the RID update notification, carries this terminal AID and new RID.

GGSN in this WCDMA core net is responsible for safeguarding the AID-RID map information to client information and this terminal communication opposite end of this terminal, and this opposite end information comprises the correspondence relationship information of this terminal AID and Correspondent Node AID thereof;

In this handoff procedure, this terminal that this preceding GGSN also will safeguard to the interface of client information between GGSN, perhaps through should before SGSN, new SGSN be sent to this new GGSN; Preceding GGSN or new GGSN find the RID of this terminal communication opposite end from this locality, the gateway that inserts to described Correspondent Node sends the RID update notification, carry AID and this new RID of this terminal.

GGSN in this WCDMA core net is responsible for safeguarding the AID-RID map information of this terminal communication opposite end;

In this handoff procedure, the AID-RID map information of this terminal communication opposite end that preceding GGSN will safeguard is sent to new GGSN, new GGSN receives behind the data message of this terminal promptly the AID-RID map information in this terminal communication opposite end of local maintenance, behind this AID-RID map information that GGSN transmits before receiving, this AID-RID map information that receive and local maintenance is merged.

In this handoff procedure, after preceding GGSN receives the data message of issuing this terminal, issue source wireless side network element through preceding SGSN, be forwarded to the target side network element through the forwarding passage between source wireless side network element and Target Wireless side network element, issue this terminal by the target side network element; Perhaps

In this handoff procedure, forwarding passage before setting up between GGSN and the preceding GGSN after preceding GGSN receives the data message of issuing this terminal, is issued new GGSN through this forwarding passage, new GGSN issues Target Wireless side network element through new SGSN again, issues this terminal by this target side network element;

After the forwarding re-positioning request that this new SGSN is SGSN before receiving, for this terminal is chosen new GGSN, set up the PDP carrying of this terminal alternately and send the AID of this terminal to new GGSN with this new GGSN, new GGSN is the new RID of this terminal distribution after receiving the AID of this terminal;

This new GGSN sends the RID register requirement to this terminal attaching ILR, perhaps, message or newly-increased message that this new GGSN sets up by the PDP carrying are sent to new SGSN with this new RID, after this new SGSN and Target RNC are set up the RAB of this terminal alternately, send the RID register requirement to this terminal attaching ILR, and GGSN returns the forwarding relocation response message forward.

This new GGSN is sent to new SGSN with this new RID, this new SGSN sends to this preceding SGSN by transmitting relocation response message with this new RID, after SGSN receives this new RID before being somebody's turn to do, find the address information of the gateway of Correspondent Node access according to the AID to Correspondent Node in the client information of this terminal of safeguarding, the gateway that inserts to described Correspondent Node sends the RID update notification, carries the AID of this terminal and new RID;

Should before SGSN by transmitting reorientation and finish acknowledgement message or transmitting the SRNS context message or newly-increased message is sent to new SGSN with this terminal of current maintenance to client information, before transmitting, should before SGSN as finding this terminal new Correspondent Node be arranged, this terminal to client information in this Correspondent Node of registration AID and send the RID update notification to the gateway that this Correspondent Node inserts.

Before after SGSN receives the forwarding relocation response message that new SGSN returns, finish acknowledgement message or transmit SRNS context message or newly-increased message by the forwarding reorientation that sends to new SGSN in the reorientation complete process, this terminal of safeguarding is sent to new SGSN to client information, new SGSN finds the address information of the gateway that Correspondent Node inserts according to this AID to Correspondent Node in the client information, and the gateway that inserts to described Correspondent Node sends the RID update notification.

This new GGSN is after being the new RID of terminal distribution, by new SGSN, preceding SGSN forward GGSN send information request, after preceding SGSN receives this information request, the AID-RID map information to client information and/or this terminal communication opposite end of this terminal of safeguarding is sent to new GGSN through preceding SGSN, new SGSN, the AID to Correspondent Node in the client information that new GGSN basis is received inquires the RID of Correspondent Node, and the gateway that inserts to Correspondent Node sends the RID update notification.

Further, above-mentioned changing method also can have following characteristics, a kind of forwarding passage of setting up this terminal between preceding GGSN and new GGSN in the following manner also in this handoff procedure:

Mode one, this new SGSN sends to this preceding SGSN by transmitting the address information that relocation response will this new GGSN, and the address information that preceding SGSN will this new GGSN sends preceding GGSN to; Preceding GGSN is mutual with this new GGSN according to this address information, the forwarding passage of this terminal between foundation and new GGSN; Perhaps

Mode two, preceding SGSN is when sending the forwarding re-positioning request to new SGSN, send the address information of preceding GGSN to new SGSN, new SGSN sends this address information to new GGSN when the PDP carrying of setting up this terminal with new GGSN, new GGSN according to this address information after, mutual with preceding GGSN, the forwarding passage of this terminal between foundation and preceding GGSN;

After this transmitted passage foundation, the message that sends to this terminal that preceding GGSN receives was forwarded to new GGSN by this forwarding tunnel, and new GGSN sends to Target Wireless side network element by new SGSN again.

This is transmitted passage and adopts mode one to set up, and the address information of this GGSN is the new RID of this terminal; Perhaps, this is transmitted passage and adopts mode two to set up, and the message RID that this terminal is new when new SGSN sets up by transmitting passage issues this preceding GGSN;

After GGSN receives the new RID of this terminal before being somebody's turn to do, find the RID of Correspondent Node according to the AID-RID map information to client information and this terminal communication opposite end of this terminal of safeguarding, the gateway that inserts to described Correspondent Node sends the RID update notification, carries the AID of this terminal and new RID; Afterwards, the AID-RID map information to the Correspondent Node of client information and/or this terminal of this terminal that will safeguard of this preceding GGSN is sent to new GGSN.

When preceding GGSN sets up this forwarding tunnel with new GGSN or after this forwarding tunnel is set up, preceding GGSN is sent to new GGSN with the AID-RID map information to client information and/or this terminal communication opposite end of this terminal, new GGSN inquires the RID of Correspondent Node according to the AID to Correspondent Node in the client information that sends, the gateway that inserts to described Correspondent Node sends the RID update notification, carries the AID of this terminal and new RID.

New SGSN is that this terminal is selected new GGSN after the reorientation complete process receives that transmitting reorientation finishes acknowledgement message, and the PDP that sets up this terminal between this new GGSN carries and send the AID of this terminal to new GGSN;

New GGSN is the new RID of terminal distribution, send the RID register requirement to this terminal attaching ILR, perhaps, message or newly-increased message that this new GGSN sets up by the PDP carrying are sent to new SGSN with this new RID, and this new SGSN sends the RID register requirement to this terminal attaching ILR.

This new GGSN is sent to new SGSN with this new RID, and this new SGSN is sent to preceding SGSN with this new RID; After preceding SGSN receives,,, carry the AID of this terminal and new RID to the gateway transmission RID update notification that described Correspondent Node inserts according to the address information that the AID to Correspondent Node in the client information of this terminal of safeguarding finds the gateway of Correspondent Node access; This new GGSN initiate RID more new technological process follow-up continuous safeguard this terminal to client information, at this RID after more new technological process finishes, this terminal that will safeguard sends new SGSN to client information and preserves and safeguard again.

This new GGSN or new SGSN are after this terminal attaching ILR sends the RID register requirement, new GGSN is GGSN forward, perhaps by new SGSN forward SGSN request to client information, receive return client information after, this new GGSN or new SGSN are according to the AID to Correspondent Node in the client information that receives, the gateway that inserts to described Correspondent Node sends the RID update notification.

This new GGSN is sent to new SGSN with this new RID, and this new SGSN is sent to preceding SGSN with this new RID; After preceding SGSN received, the RID that this is new sent to preceding GGSN;

GGSN finds the address information of the gateway of Correspondent Node access according to the AID to Correspondent Node in the client information of this terminal of preserving before being somebody's turn to do, to the gateway transmission RID of described Correspondent Node access update notification; Perhaps, what GGSN will preserve before being somebody's turn to do is sent to new SGSN to client information, this new SGSN finds the address information of the gateway of Correspondent Node access according to the AID to Correspondent Node in the client information of this terminal of receiving, and the gateway that inserts to described Correspondent Node sends the RID update notification.

SGSN is when new SGSN transmission forwarding reorientation is finished acknowledgement message or transmitted re-positioning request before being somebody's turn to do, send the address information of preceding GGSN to new SGSN, new SGSN sends this address information to new GGSN when the PDP carrying of setting up this terminal with new GGSN, before new GGSN gets access to after the address information of GGSN, and set up the forwarding passage of this terminal between the preceding GGSN;

This new GGSN receive before GGSN send to behind the client information, GGSN transmits the AID of Correspondent Node in the next data message of issuing this terminal before checking, as find that new Correspondent Node or RID upgrade not successful Correspondent Node, the gateway that inserts to these Correspondent Nodes sends and retransmits the RID update notification, and with the AID of new Correspondent Node register to this terminal in the client information.

The terminal switching process of SRNS Serving Radio Network Subsystem between the described SGSN of relating to (SRNS) reorientation is meant the associating direct-cut operation in PS territory and the repositioning process of terminal SGSN-spanning, or the sub-district/URA of associating and the process of Serving Radio Network System reorientation.

Before SGSN or new SGSN when finding the address information of the gateway that Correspondent Node inserts according to the AID to Correspondent Node in the client information of this terminal, be the address information that inquires the gateway that Correspondent Node inserts according to the AID of this terminal communication opposite end from this locality configuration or Correspondent Node ownership place subscribed services device (HLR/HSS) or dns server or ILR;

When the gateway that the Correspondent Node that inquires inserts is SGSN, after this GGSN receives the RID update notification, the RID in the AID-RID map information of this terminal of preserving is updated to this new RID; When the gateway that the Correspondent Node that inquires inserts is SGSN, after the gateway that this Correspondent Node inserts is received the RID update notification, also to send the RID update notification to the GGSN that this Correspondent Node inserts; RID in the AID-RID map information of this terminal that will preserve again after this GGSN receives is updated to this new RID.

In the Routing Area Update process that reorientation complete process terminal is initiated, the GGSN address that need this terminal be inserted to the signatory register (HLR/HSS) of this terminal attaching is updated to the address of this new GGSN.

This new SGSN judges whether to select new GGSN according to location information of terminals and/or network configuration information, is being connected different GGSN as this new SGSN with preceding SGSN on physical connection, and then this new SGSN selects new GGSN; If new SGSN is being connected identical a plurality of GGSN with preceding SGSN, then new SGSN does the selection judgement according to zone, terminal position and/or APN.

The GGSN of this new GGSN as inserting after having selected preceding GGSN as reorientation, and the SGSN maintenance terminal to client information the time, the RELOCATION REQUEST message that SGSN sends to new SGSN by the reorientation set-up procedure before being somebody's turn to do, or the reorientation complete process finishes acknowledgement message to the forwarding reorientation that new SGSN sends, or newly-increased message is sent to this new SGSN with this terminal to client information.

SGSN or GGSN are when safeguarding client information, by flowing real-time testing mechanism and/or checking that the AID in the data message of this terminal finds the Correspondent Node that new Correspondent Node maybe need be deleted, with the AID of new Correspondent Node register to this terminal in the client information, with this to needing AID deletion of deleting communication opposite end in the client information.

SGSN or GGSN are when safeguarding client information, by flowing real-time testing mechanism and/or checking AID in the data message of this terminal, with the AID of the new Correspondent Node found register to this terminal in the client information, with the AID of the Correspondent Node of need deletion from this to deleting the client information.

Correspondingly, WCDMA core net provided by the invention comprises critical point GPRS node (GGSN), service GPRS node (SGSN) and the home subscriber register (HLR/HSS) of contracting, and also comprises identity location register (ILR), wherein:

Described SGSN is used in the terminal cut process that relates to SRNS Serving Radio Network Subsystem between SGSN (SRNS) reorientation, select GGSN, when having selected new critical point GPRS node (GGSN), also set up the PDP carrying between new SGSN and this new GGSN and send the AID of this terminal to this new GGSN for this terminal;

Described GGSN is used to the new station location marker of this terminal distribution (RID), and preserves the map information of this terminal identity sign (AID) and this new RID;

Described GGSN or SGSN also are used for sending the RID register requirement to incision terminal attaching ILR, carry this new RID, and this terminal attaching ILR upgrades the RID of this terminal of preserving.

Further, above-mentioned WCDMA core net also can have following characteristics:

Described SGSN comprises:

Cut out control module, be used at the handoff procedure that relates to SRNS Serving Radio Network Subsystem between SGSN (SRNS) reorientation, receive that source wireless side network element sends at after the re-positioning request that cuts out terminal, send the forwarding re-positioning request to new SGSN, after message is finished in the forwarding reorientation of receiving the target SGSN transmission, reply forwarding reorientation to this target SGSN and finish acknowledgement message;

The incision control module, be used at the handoff procedure that relates to SRNS Serving Radio Network Subsystem between SGSN (SRNS) reorientation, SGSN sends before receiving at the forwarding re-positioning request of incision terminal or transmit after reorientation finishes acknowledgement message, select GGSN, when having selected new GGSN, for this incision terminal is set up PDP carrying between this SGSN and new GGSN, send the AID of this incision terminal to new GGSN;

Packet forwarding module, the data message that is used between GGSN and wireless side network element, transmitting the incision terminal and cuts out terminal;

Described GGSN comprises:

Cut out control module, be used for after terminal cuts out, be released to the resource that this cuts out terminal distribution;

The incision control module, be used for the AID of the incision terminal that forwarding re-positioning request that receiving before SGSN sends and new SGSN transmit after, call the RID distribution module, be this incision terminal set up and this new SGSN between PDP carry;

The RID distribution module is used to the incision terminal distribution to point to the new RID of this GGSN, preserves the map information of this incision terminal AID and this new RID;

Packet forwarding module is used for incision terminal, the data message that cuts out terminal are transmitted processing.

Described SGSN also comprises the RID Registering modules, is used for sending register requirement to incision terminal attaching identity location register (ILR), carries the AID of this incision terminal and new RID; The incision control module of described GGSN also is used for the new RID for the incision terminal distribution is sent to new SGSN; The incision control module of described SGSN also is used for calling described RID Registering modules after receiving this new RID; Perhaps

Described GGSN also comprises the RID Registering modules, is used for sending register requirement to incision terminal attaching identity location register (ILR), carries the AID of this incision terminal and new RID; The incision control module of described GGSN is called this RID Registering modules after also being used to obtain to cut the new RID of terminal.

Described SGSN also comprises opposite end maintenance of information module, be used for maintenance terminal to client information, comprise the correspondence relationship information of this terminal AID and Correspondent Node AID thereof;

The control module that cuts out of described SGSN also is used at handoff procedure, cuts out terminal client information is sent to new SGSN and notifies opposite end maintenance of information module to stop to safeguard with what safeguard;

The incision control module of described SGSN also is used at handoff procedure, the incision terminal that SGSN transmits before receiving to client information, notify the opposite end maintenance of information module of this SGSN to preserve and safeguard;

Described SGSN also comprises the RID update module, be used for finding the address of the gateway that Correspondent Node inserts according to incision terminal or the AID that cuts out terminal to the client information Correspondent Node, the gateway that inserts to described Correspondent Node sends the RID update notification, carries this terminal AID and new RID.

The incision control module of described GGSN also is used for the new RID for the incision terminal distribution is sent to new SGSN;

The control module that cuts out of described SGSN also is used for after receiving the new RID that cuts out terminal that new SGSN transmits, and calling the RID update module is to cut out the RID renewal that terminal is initiated to the opposite end; And by transmit reorientation finish acknowledgement message transmit the SRNS context message or newly-increased message will be safeguarded cut out terminal client information is sent to new SGSN;

The incision control module of described SGSN is that the forwarding re-positioning request at the incision terminal that SGSN sends before receiving is selected GGSN, and also be used for after receiving the new RID that new GGSN sends, this new RID be sent to preceding SGSN by transmitting relocation response message.

The control module that cuts out of described SGSN also is used for after receiving the forwarding relocation response message that new SGSN returns, finish acknowledgement message or transmit SRNS context message or newly-increased message by transmitting reorientation, with safeguard cut out terminal client information is sent to new SGSN;

The incision control module of described SGSN is that the forwarding re-positioning request at the incision terminal that SGSN sends before receiving is selected GGSN, and also be used for incision terminal that before receiving SGSN transmits to behind the client information, call the RID update module and upgrade for the RID that the incision terminal is initiated to the opposite end.

Described GGSN also comprises opposite end maintenance of information module, be used for maintenance terminal to client information, comprise the correspondence relationship information of this terminal AID and Correspondent Node AID thereof;

The control module that cuts out of described GGSN also is used at handoff procedure, with safeguard cut out terminal client information is sent to new GGSN;

The incision control module of described GGSN also is used at handoff procedure, the incision terminal that GGSN transmits before receiving to client information, notify the opposite end maintenance of information module of this SGSN to preserve and safeguard;

Described GGSN also comprises the RID update module, be used for finding corresponding RID according to incision terminal of safeguarding or the AID that cuts out terminal to the client information Correspondent Node, the gateway that inserts to described Correspondent Node sends the RID update notification, carries this terminal AID and new RID.

The incision control module of described GGSN also is used for after for the new RID of incision terminal distribution, by new SGSN, preceding SGSN forward GGSN send information request; And receive the incision terminal that sends to client information after, call the RID update module and upgrade for the RID that the incision terminal is initiated to the opposite end;

Described GGSN cuts out after control module also is used for information request that before receiving GGSN sends, and the AID-RID map information of safeguarding to client information and/or this terminal communication opposite end that cuts out terminal is sent to new GGSN through preceding SGSN, new SGSN;

The incision control module of described GGSN also is used for sending the new RID for the incision terminal distribution to preceding GGSN;

Described GGSN cut out that control module is used for also that before receiving GGSN transmits cut out the new RID of terminal after, calling the RID update module is to cut out the RID renewal that terminal is initiated to the opposite end, after renewal was finished, the AID-RID map information to the Correspondent Node of client information and/or this terminal of this terminal that this preceding GGSN will be safeguarded was sent to new GGSN.

Described GGSN cuts out that control module also is used for when setting up this forwarding tunnel with new GGSN or after this forwarding tunnel is set up, the AID-RID map information to client information and/or this terminal communication opposite end that cuts out terminal is sent to new GGSN,

The incision control module of described GGSN also be used for incision terminal that before receiving GGSN transmits to behind the client information, call the RID update module and upgrade for the RID that the incision terminal is initiated to the opposite end.

Described GGSN also comprises the map information maintenance module, be used at handoff procedure, receive behind the data message of incision terminal promptly at the AID-RID map information of the Correspondent Node of local maintenance this incision terminal, behind the AID-RID map information of the Correspondent Node of this terminal that the preceding GGSN that receives transmits with this AID-RID map information merging of local maintenance;

The control module that cuts out of described GGSN also is used at handoff procedure, and the AID-RID map information of the Correspondent Node that cuts out terminal safeguarded is sent to new GGSN;

The incision control module of described GGSN also is used at handoff procedure, the AID-RID map information of the Correspondent Node of the incision terminal that GGSN transmits before receiving, and notify the map information maintenance module of this SGSN to preserve and maintenance.

The packet forwarding module of described GGSN is used for giving preceding SGSN with the data message forwarding of receiving that cuts out terminal of issuing, and gives new SGSN with the data message forwarding of receiving of issuing the incision terminal; The data message forwarding that the packet forwarding module of described SGSN is used for issuing of receiving cut out terminal is to source wireless side network element, and the data message forwarding that will issue the incision terminal is to Target Wireless side network element; Perhaps

Described GGSN comprises that also transmitting passage sets up module, is used for setting up forwarding passage between this GGSN and the former GGSN at handoff procedure for the incision terminal, or sets up forwarding passage between this GGSN and the preceding GGSN for cutting out terminal; The packet forwarding module of described GGSN be used for receive issue the data message that cuts out terminal after, issue new GGSN through this forwarding passage, and receive issue the incision terminal data message after, be transmitted to new SGSN; The data message forwarding that the packet forwarding module of described SGSN is used for issuing of receiving cut out terminal is to source wireless side network element, with the data message forwarding of issuing the incision terminal received to Target Wireless side network element.

The incision control module of described SGSN is that the forwarding re-positioning request at the incision terminal that SGSN sends before receiving is selected GGSN, and also is used for by transmitting relocation response the address information of new GGSN being sent to preceding SGSN; Described SGSN cut out control module receive new GGSN address information send preceding GGSN to; Described GGSN comprises that also transmitting passage sets up module, and is mutual with this new GGSN after the address information of the new GGSN that SGSN transmits before being used to receive, sets up and newly cut out between GGSN the forwarding passage of terminal; Perhaps

The incision control module of described SGSN is that the forwarding re-positioning request at the incision terminal that SGSN sends before receiving is selected GGSN; The control module that cuts out of described SGSN is sending to new SGSN when transmitting re-positioning request, sends the address information of preceding GGSN to new SGSN; The incision control module of described SGSN sends new GGSN in the address information of setting up the preceding GGSN that the PDP carrying of this terminal the time will receive with new GGSN; Described GGSN comprises that also transmitting passage sets up module, be used for the address information of GGSN receiving before after, mutual with preceding GGSN, set up and preceding GGSN between this cut the forwarding passage of terminal.

The control module that cuts out of described SGSN is to transmit reorientation when finishing acknowledgement message or transmitting re-positioning request sending to new SGSN, sends the address information of preceding GGSN to new SGSN; The incision control module of described SGSN is that the address information of the preceding GGSN that will receive when the PDP carrying of setting up the incision terminal with new GGSN sends new GGSN to; Described GGSN comprises that also transmitting passage sets up module; After the address information of GGSN, call described forwarding passage and set up module before the incision control module of described GGSN is received; The forwarding passage of described GGSN set up that module is used for and preceding GGSN between the mutual forwarding passage of setting up the incision terminal.

The opposite end maintenance of information module of described GGSN also be used for GGSN sends before preservation incision terminal to behind the client information, GGSN transmits the AID of Correspondent Node in the next data message of issuing this incision terminal before checking, as find that new Correspondent Node or RID upgrade not successful Correspondent Node, with the AID of new Correspondent Node register to this incision terminal in the client information, and send out update notification to the incision control module of this GGSN, carry the AID of these Correspondent Nodes;

After the incision control module of described GGSN also is used to receive the update notification of opposite end maintenance of information module transmission, call gateway transmission and repeating transmission RID update notification that the RID update module inserts to these Correspondent Nodes.

When the RID update module of described GGSN finds the address information of the gateway that Correspondent Node inserts according to the AID to Correspondent Node in the client information of this terminal, be the address information that inquires the gateway that Correspondent Node inserts according to the AID of this terminal communication opposite end from this locality configuration or Correspondent Node home subscribed services device (HLR/HSS) or dns server or ILR.

The incision control module of described SGSN is to judge whether to select new GGSN according to location information of terminals and/or network configuration information, is being connected different GGSN as this new SGSN with preceding SGSN on physical connection, and then this new SGSN selects new GGSN; If new SGSN is being connected identical a plurality of GGSN with preceding SGSN, then new SGSN does the selection judgement according to zone, terminal position and/or APN.

The link information maintenance module of described SGSN or GGSN is when safeguarding client information, be by flowing real-time testing mechanism and/or checking AID in the data message of this terminal, with the AID of the new Correspondent Node found register to this terminal in the client information, with the AID of the Correspondent Node of need deletion from this to deleting the client information.

Above-mentioned based on the WCDMA core net changing method and corresponding WCDMA core net except can realizing switching, identify label that can support terminal separates with the position, avoids route circuitous.And in certain embodiments, can not influence the consistency of existing reorientation flow process, have feasibility preferably as far as possible based on existing reorientation flow process.

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 a is the Organization Chart of existing WCDMA system packet domain;

Fig. 1 b is the Organization Chart of the single tunnel system of existing WCDMA;

Fig. 2 a is associating direct-cut operation and SRNS reorientation and the preceding schematic diagram of Routing Area Update;

Fig. 2 b is the schematic diagram behind associating direct-cut operation and SRNS reorientation and the Routing Area Update;

Fig. 3 a and Fig. 3 b are the associating direct-cut operation in existing PS territory and the flow chart of the SRNS repositioning process between SGSN;

Fig. 4 a is a kind of schematic diagram of the SILSN network architecture;

Fig. 4 b is the schematic diagram of the form of data message in the SILSN framework shown in Fig. 4 a;

Fig. 5 has the schematic diagram of the WCDMA core net framework one of SILSN framework for the present invention;

Fig. 6 has the schematic diagram of the WCDMA core net framework two of SILSN framework for the present invention;

Fig. 7 has the schematic diagram of the WCDMA core net framework three of SILSN framework for the present invention;

Fig. 8 is the schematic flow sheet of the changing method of the embodiment of the invention one;

Fig. 9 is the schematic flow sheet of the changing method of the embodiment of the invention two;

Figure 10 is the schematic flow sheet of the changing method of the embodiment of the invention three;

Figure 11 is the schematic flow sheet of the changing method of the embodiment of the invention four;

Figure 12 is the schematic flow sheet of the changing method of the embodiment of the invention five.

Embodiment

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.

The present invention in the WCDMA 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, can send the RID update notification to the gateway that Correspondent Node inserts.Source ASN can also transmit the AID-RID map information to client information and/or all Correspondent Nodes of this terminal to target ASN.In addition, in handoff procedure, source ASN need transmit the message that Correspondent Node sends to this terminal to target ASN.

Three kinds of frameworks with WCDMA core net of SILSN framework have been shown in Fig. 5～7:

Framework one has signaling interface between SGSN and the ILR, is used for to ILR registration, removes the RID of registration terminal.GGSN is terminal distribution RID.Also have signaling interface between GGSN and the ILR, be used for RID to ILR query communication opposite end.As shown in Figure 5.

Framework two, GGSN are terminal distribution RID, have signaling interface between GGSN and the ILR, are used for to ILR registration, remove the RID of registration terminal and the RID of query communication opposite end.As shown in Figure 6.

Framework three has signaling interface between SGSN and the ILR, is used for to the ILR registration, removes the RID of registration terminal and the RID of query communication opposite end.GGSN is terminal distribution RID, and does not have direct signaling interface between the ILR, by the RID of SGSN to ILR query communication opposite end.As shown in Figure 7.

More than in three kinds of frameworks, distribute RID by GGSN, the AID-RID map information of the Correspondent Node of maintenance terminal, the data message is carried out the RID encapsulation conciliate the RID encapsulation, the message between the GGSN is by broad sense Forwarding plane (can be realized by the packet data network of supporting RID route and forwarding) route and forwarding.Can on SGSN and/or GGSN, safeguarding of terminal to client information.

Situation for the direct-connected tunnel shown in Fig. 1 b does not influence the division of above-mentioned three kinds of frameworks.All there is the problem of how to carry out intra-system handover in above-mentioned framework, and the switching between SGSN can cause the variation of SGSN, and the variation of possible GGSN.The present invention is not limited to above-mentioned three kinds of frameworks.Because wireless access network may adopt other structure, Target RNC may be other wireless side network element in other frameworks.

In the reorientation set-up procedure based on above WCDMA core net framework, GGSN no longer needs grappling, and new SGSN can select new GGSN.Whether change according to GGSN, be divided into GGSN and SGSN all changes, and GGSN is constant, SGSN changes two kinds of scenes.

Embodiment one and embodiment two at be the constant scene of GGSN, in SGSN maintenance terminal to client information, in repositioning process before SGSN need to cut out terminal client information is sent to new SGSN.If safeguard that at GGSN the same prior art of reorientation flow process does not change to client information.

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, as former side network element terminal is switched when handling describing certain network element, claimed this terminal for cutting out terminal; As the target side network element terminal is switched when handling describing certain network element, claimed this terminal to be the incision terminal.In the literary composition, also the network element that the Correspondent Node of terminal is inserted abbreviates the opposite end network element as; In addition, 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.

Embodiment one

Present embodiment based on WCDMA core net framework can be in above-mentioned 3 kinds of frameworks any, GGSN is constant in the repositioning process.SGSN preserve and maintenance terminal to client information.Before " message is finished in the forwarding reorientation " message of sending to new SGSN by the reorientation complete process of SGSN transmit terminal to client information.

As shown in Figure 8, the reorientation flow process of the associating direct-cut operation in present embodiment PS territory and terminal SGSN-spanning comprises:

Step 801: the step 301 of together existing reorientation flow process is to step 310;

Can judge whether to need to select new GGSN after the forwarding RELOCATION REQUEST message that SGSN sent before wherein new SGSN received, present embodiment is not for needing.

Step 802: Target RNC receive RRC message that terminal sends such as physical channel reconfigure finish message or radio bearer Release complete after, send reorientation to new SGSN and finish message, this step is with the step 311 of existing reorientation flow process;

Step 803: new SGSN SGSN forward sends " transmit reorientation and finish message ";

Message is finished in this forwarding reorientation can also can increase an indication information with this message of prior art in this message of prior art, being used for forward, SGSN asks for client information.

Step 804: after preceding SGSN receives " transmit reorientation and finish message ", this terminal client information is carried in " transmit reorientation and finish acknowledgement message " sent to new SGSN;

If preceding SGSN do not preserve this terminal to client information, can finish to carry in receiveing the response in reorientation have this indication information to client information.

Step 805: new SGSN SGSN forward initiates PDP renewal, the same prior art of follow-up flow process.

Embodiment two

Present embodiment based on WCDMA core net framework can be in above-mentioned 3 kinds of frameworks any, GGSN is constant in the repositioning process.SGSN preserve terminal to client information.Before SGSN by the reorientation set-up procedure to the message of new SGSN transmission as " RELOCATION REQUEST message " transmit terminal to client information.

As shown in Figure 9, the reorientation flow process of the associating direct-cut operation in present embodiment PS territory and terminal SGSN-spanning comprises:

Step 901: switching flow is initiated in RNC decision in source, with step 301;

Step 902: source RNC SGSN forward sends re-positioning request, with step 302;

Step 903: preceding SGSN sends to new SGSN and transmits RELOCATION REQUEST message, carry in the message this terminal that original parameter information and preceding SGSN safeguard to client information;

Step 904: new SGSN judges whether to need to select new GGSN, does not need in the present embodiment to select, and therefore, new SGSN sends re-positioning request to Target RNC, follow-up same prior art.

In this step, new SGSN can judge whether to select new GGSN according to location information of terminals and/or network configuration information.For example, if new SGSN is being connected different GGSN with preceding SGSN on physical connection, so new SGSN selects new GGSN, and new SGSN can know the address of old GGSN from context.If new SGSN is being connected identical a plurality of GGSN with preceding SGSN, so new SGSN can do the selection judgement according to zone, terminal position and/or APN.In one example, new SGSN can be according to terminal place LAI or RNC ID, this terminal of chosen distance nearest and be the GGSN that belongs to same APN.Other embodiment herewith.

In the flow process of above-mentioned two embodiment, preceding SGSN will be sent to new SGSN to client information by existing message, but the present invention is not limited thereto, also can by preceding SGSN to new SGSN send new message transmit terminal to client information.

Following embodiment all at be that the scene that GGSN changes takes place in the repositioning process, the processing relevant with AID, RID that relate to this moment comprises: cut a side and will be the new RID of terminal distribution, register the new RID of this terminal to this terminal attaching ILR; Cut a side or cut out a side direction opposite end gateway (, also may be border gateways such as ISN) and initiate the RID renewal as GGSN.Cut out a side direction cut a side transmit this terminal to client information.Cut out a side direction in the handoff procedure and cut a side and can use Fig. 3 a to the message forwarding that Correspondent Node sends to this terminal, the existing mode among the 3b realizes, also can change by the forwarding tunnel between the GGSN and realize.

Embodiment three:

Present embodiment based on the framework of WCDMA core net be above-mentioned framework one and framework three, GGSN changes in the repositioning process, by the RID of SGSN to ILR registration updating terminal, safeguard and preserve terminal to client information, and cut the side transmission from cutting out side direction.

As shown in figure 10, the reorientation flow process of the associating direct-cut operation in present embodiment PS territory and terminal SGSN-spanning, GGSN comprises:

Step 1001-1003: with step 301-303;

Step 1004: new SGSN receives RELOCATION REQUEST message, as select a new GGSN, then and this new GGSN PDP of setting up this terminal alternately carries and send the AID of this terminal to new GGSN, new GGSN is the new RID of terminal distribution, preserve the map information of this terminal AID and this new RID, and send this new RID to new SGSN as being carried in the PDP carrying foundation response;

If based on second kind of framework, promptly have only between GGSN and ILR and have signaling interface, new GGSN can be behind the new RID that has been terminal distribution, or receive when new SGSN and Target RNC have been set up the message that sends to new GGSN behind the RAB of this terminal as newly-increased message, send register requirement (belonging to registration updating) to this terminal attaching ILR.Correspondingly, new GGSN needn't transmit this new RID to SGSN, also execution in step 1006 again.

Step 1005: new SGSN and Target RNC are mutual, set up the RAB of this terminal, with step 304;

Step 1006: new SGSN sends the RID register requirement to this terminal attaching ILR, carries the AID of this terminal and new RID;

After this ILR receives the RID register requirement, the RID in this terminal AID-RID map information of preserving is updated to this new RID, has also promptly upgraded the AID-RID map information of this terminal.

This step can be after step 1004 be promptly carried out, but initiates the RID registration again after setting up the RAB success, can avoid RAB to set up when carrying out the reorientation cancellation after the failure, also will arrive ILR and cancel renewal to this terminal RID.

Step 1007: new SGSN SGSN forward returns the forwarding relocation response message, carries the new RID into this terminal distribution;

RID register flow path that above-mentioned steps 1006 is initiated and step 1007 are returned the sequencing between the re-positioning request response message, and the present invention does not do qualification.

Step 1008: after preceding SGSN receives the re-positioning request response,,, carry the AID of this terminal and new RID to opposite end gateway transmission RID update notification according to the address that the AID to Correspondent Node in the client information of this terminal of safeguarding determines the opposite end gateway;

SGSN can be according to the AID of this terminal communication opposite end, inquires the address information of opposite end gateway such as SGSN, GGSN, borde gateway etc. from this locality configuration or Correspondent Node ownership place HLR/HSS or dns server or ILR.If send to opposite end SGSN, then opposite end SGSN also will send the RID update notification to corresponding opposite end GGSN, after opposite end GGSN receives this notice, the RID in the AID-RID map information of this terminal of preservation is updated to this new RID.

Before SGSN at RID after more new technological process begins to the opposite end, for the Correspondent Node of all registered and new registrations, preceding SGSN will can both be routed to new GGSN with the message of guaranteeing all Correspondent Nodes transmissions of this terminal to the gateway transmission RID of its access update notification.Among each embodiment, SGSN is when safeguarding client information, as can be by flowing real-time testing mechanism and/or the modes such as AID in the data message of this terminal of checking are found the Correspondent Node that new Correspondent Node maybe need be deleted, with the AID of new Correspondent Node register to this terminal in the client information, from to deleting the client information, GGSN also herewith with the AID of need deleting communication opposite end.Preceding SGSN can this stops to safeguard behind new SGSN to client information in transmission.In another example, also can be by triggering a timer, the message of receiving in during this timer is is regularly detected and/or checks, the message again received of timer after then all will abandon.

Step 1009: preceding SGSN sends the reorientation command messages to source RNC, carries out the reorientation implementation, with step 306 to 310;

To the sequencing of SGSN transmission reorientation order before SGSN transmission RID update notification and the step 1009 before the above-mentioned steps 1008, the present invention does not do qualification.

Step 1010: Target RNC detect RRC message that UE sends such as physical channel reconfigure finish message or radio bearer Release complete after, send reorientation to new SGSN and finish message, with step 311;

Step 1011: new SGSN SGSN transmission forwarding reorientation forward finishes message, and preceding SGSN returns the forwarding reorientation to new SGSN and finishes acknowledgement message, with step 313;

Before SGSN by what transmit that reorientation finishes this terminal that acknowledgement message will safeguard client information is communicated to new SGSN, newly SGSN preserves this to client information and safeguard.In other examples, preceding SGSN also can be sent to new SGSN with this to client information by forwarding SRNS context message or other newly-increased message.

Step 1012: after preceding SGSN received message, notification source RNC discharged the Iu mouth, GGSN deletion relevant bearer before the notice;

After preceding GGSN receives the notice of deletion relevant bearer, also delete the AID-RID map information of this terminal of local maintenance, delete the AID-RID map information that has not had the Correspondent Node of correspondence in this terminal communication opposite end with the other-end that inserts preceding GGSN.

Step 1013: the routing update flow process, with the step 315 of existing reorientation flow process, but can increase the address that GGSN address among the HLR/HSS is updated to new GGSN, if HLR preserves the RID information of terminal, can also increase renewal to this terminal RID information.

Data forwarding paths in the present embodiment handoff procedure can same prior art, and the downlink message that preceding GGSN receives arrives source RNC by preceding SGSN, is transmitted to terminal by the forwarding passage between source RNC and the Target RNC again.

In the above-mentioned flow process, preceding SGSN in the past GGSN obtains the AID-RID map information of these all Correspondent Nodes of terminal, by and new SGSN between message finish acknowledgement message and be sent to new SGSN as transmitting reorientation, can be with client information is transmitted.New SGSN again this AID-RID map information is set up message by the PDP carrying or newly-increased message sends to new GGSN preservation.

Switch finish after, terminal will be carried out the RID encapsulation of message by Target RNC, new SGSN and new GGSN and outside packet data network communication by new GGSN] decapsulation and forwarding, thereby realized the switching of no fixed anchor point, can avoid route to make a circulation.

Above-mentioned flow process can also have other change example, and is as follows:

Become example one

This becomes in the example, sends the RID update notification by new SGSN, and multiple mode is arranged again:

Mode one

In step 1003, preceding SGSN by transmit RELOCATION REQUEST message with terminal client information is sent to new SGSN, new SGSN preserves this to client information;

In step 1007, new SGSN SGSN forward returns the new RID that does not carry when transmitting relocation response message to terminal distribution, in addition, need send the RID update notification to client information to the opposite end gateway according to what preserve.

Cancellation step 1008.

Under the manner, preceding SGSN transmits that stream detects to proceeding in real time after the client information, notifies new SGSN with the AID of the new Correspondent Node found.This detection can finish after the time when certain receiving when transmitting relocation response message or postpone.

Mode two

In step 1007, new SGSN SGSN forward returns the new RID that does not carry when transmitting relocation response message to terminal distribution;

Cancellation step 1008.

Preceding SGSN receives and transmits after the relocation response message, message by former flow process is finished acknowledgement message as transmitting reorientation, transmits the SRNS context message, perhaps by newly-increased message, with this terminal of safeguarding client information is sent to new SGSN, new SGSN receives that the back initiates RID to the opposite end and upgrade.

Under the manner, because preceding SGSN transmits after the ILR registration updating client information at new SGSN or new GGSN again, therefore newly-increased Correspondent Node can send to downlink message new GGSN, and preceding SGSN needn't detect message or check after transmitting again.

Become example two

This becomes in the example, client information is safeguarded in GGSN, new GGSN is being the new RID of terminal distribution, after registering the new RID of this terminal to this terminal attaching ILR, by new SGSN, preceding SGSN forward GGSN send information request, before after SGSN receives this information request, this terminal is sent to new GGSN to client information through preceding SGSN, new SGSN.New GGSN is at the message that just may receive this terminal to ILR registration back, after new GGSN is the new RID of this terminal distribution, according to the message of this terminal of receiving client information is safeguarded (as the AID of Correspondent Node in the detection messages and/or flow detection in real time to this terminal, Correspondent Node that at this moment may be new inquires new RID from ILR), receive send to behind the client information, with that receive and this terminal local maintenance client information is merged.

What SGSN was sent to new SGSN before above-mentioned also can be the AID-RID map information (comprising client information) of this terminal communication opposite end, or comprises the AID-RID map information to client information and this terminal communication opposite end simultaneously.

If there is signaling interface between the GGSN, above-mentioned information can directly be passed on by the signaling interface between the GGSN.

Embodiment four

Present embodiment is applicable to above-mentioned framework one and framework three, GGSN changes in the repositioning process, GGSN safeguards client information is upgraded with the RID that is initiated to the opposite end, forwarding passage by between GGSN before the signaling interface foundation between the GGSN and the new GGSN utilizes this forwarding passage to transmit the downlink data message of this terminal in handoff procedure.

As shown in figure 11, the reorientation flow process of the associating direct-cut operation in present embodiment PS territory and terminal SGSN-spanning, GGSN comprises:

Step 1101-1303: with step 301～303 of existing reorientation flow process;

Step 1104～1107: with step 1004～1007, new SGSN selects new GGSN for this terminal, set up the PDP carrying of this terminal alternately and send the AID of this terminal to new GGSN with this new GGSN, new GGSN is the new RID of terminal distribution and this new RID is sent to new SGSN; After new SGSN and Target RNC are set up the RAB of this terminal alternately, register the new RID of this terminal, and this new RID is sent to preceding SGSN by transmitting the re-positioning request response message to ILR;

During based on framework two, need are registered the new RID of this terminal to ILR after distributing new RID by new GGSN.

Step 1108: preceding SGSN GGSN forward sends signaling, notifies this terminal RID that renewal has taken place, and carries the AID of this terminal and new RID; After preceding GGSN receives this signaling, set up the forwarding passage of this terminal with new GGSN, according to this terminal of safeguarding client information is sent the RID update notification to the opposite end gateway, and the AID-RID map information to the Correspondent Node of client information and/or this terminal of this terminal is sent to new GGSN;

Before GGSN can obtain the address information of new GGSN according to new RID, thereby set up and the new forwarding passage between the GGSN.Before safeguard the AID-RID map information that this terminal is arranged among GGSN or the new GGSN to the Correspondent Node of client information and this terminal, therefore can directly find the RID of Correspondent Node from this locality, obtain the address information of opposite end gateway such as GGSN.

In this step, also can the AID-RID map information to the Correspondent Node of client information and/or this terminal of this terminal be sent to new GGSN by preceding GGSN, the signaling that sends to new GGSN as GGSN before when set up transmitting passage is carried, and the RID that new GGSN can be initiated to corresponding opposite end gateway according to the AID to Correspondent Node in the client information that sends is new technological process more.In addition, new GGSN just can begin client information is safeguarded to this terminal by the modes such as message of checking this terminal behind the terminal distribution RID, GGSN sends before receiving to behind the client information, with that receive and this terminal local maintenance client information is merged.The AID-RID map information of this terminal communication opposite end can transmit together with link information, also can adopt at preceding GGSN and new GGSN and safeguard respectively, is handled by the mode that new GGSN merges.

After preceding GGSN sets up with the forwarding passage of new GGSN, the message that sends to this terminal that preceding GGSN receives just directly is forwarded to new GGSN, new GGSN receives that the back sends to Target RNC by new SGSN, preceding GGSN transmits separating the RID encapsulation by preceding GGSN before the client information, maintenance is to client information, can separate the RID encapsulation by new GGSN afterwards, safeguard client information.The data message that sends to terminal that new GGSN receives sends to Target RNC by new SGSN.Needn't data have been transmitted by source RNC to Target RNC again.Data message as for terminal sends before switching to Target RNC, still is forwarded to the broad sense Forwarding plane through source RNC, preceding SGSN, preceding GGSN, after switching to Target RNC, then can be through Target RNC, and new SGSN and new GGSN transmit.

Alternatively, preceding GGSN triggers a timer after receiving above-mentioned signaling, timer then before the Correspondent Node of all registered and new registrations, preceding SGSN will send the RID update notification to the gateway of its access.

Step 1109, basic reorientation implementation with existing reorientation flow process just adopts the mode of transmitting data between the GGSN, and source RNC does not need to transmit data to Target RNC;

Step 1110-1111 is with the step 311-312 of existing reorientation flow process;

Step 1112: with step 1012, preceding SGSN and preceding GGSN discharge related resource;

Step 1113: with step 1013, the routing update flow process increases the address that GGSN address among the HLR/HSS is updated to new GGSN, can also increase the renewal to this terminal RID information.

The above-mentioned flow process of embodiment four can also have other change example, for example:

Become example one

This change example is different with the mode that above-mentioned flow process is set up forwarding passage between the GGSN.In this change example, sending to new SGSN when transmitting re-positioning request by preceding SGSN, send the address information of preceding GGSN to new SGSN, new SGSN is when setting up the PDP carrying of this terminal with new GGSN, send this address information to new GGSN again, before new GGSN gets access to after the address information of GGSN, and set up the forwarding passage of this terminal between the preceding GGSN.At this moment, preceding SGSN does not need new RID is sent to preceding GGSN, does not need to send signaling yet, and renewal has taken place this terminal of GGSN RID before informing.At this moment, be initiated to the registration updating of ILR in this way by GGSN, new GGSN does not need the RID that this is new to be sent to new SGSN.

Other are as transmitting client information, and RID upgrades can adopt the mode of mentioning in the above-mentioned flow process.And, new GGSN can be by the AID of Correspondent Node in the data message of issuing this terminal of GGSN forwarding before checking, as find that new Correspondent Node or RID upgrade not successful Correspondent Node, the gateway that inserts to these Correspondent Nodes sends or retransmits the RID update notification, and the assurance opposite end can both successfully be upgraded.The AID of new Correspondent Node also to register to this terminal in the client information.At this moment, the downlink data message to preceding GGSN receives can be transmitted to new GGSN, separates the RID encapsulation by new GGSN.This flow process for embodiment four also is suitable for.

Some technological means of above-mentioned two embodiment also can combine, obtain new embodiment, for example, in adopting embodiment three during by SGSN maintenance terminal client information and the RID that is initiated to the opposite end are upgraded, forwarding passage before can adopting embodiment four simultaneously and becoming the method foundation of mentioning in the example of between GGSN, setting up the forwarding passage between GGSN and the new GGSN, with embodiment three, the forwarding of downlink data message is then with embodiment four to the transmission of client information and RID update mode.

Embodiment five

Present embodiment is in repositioning process, and GGSN changes, and carries out AID and RID relevant treatment again in the reorientation complete process.

As shown in figure 12, the reorientation flow process of the associating direct-cut operation in present embodiment PS territory and terminal SGSN-spanning, GGSN comprises:

Step 1201-1210: with step 301～310 of existing reorientation flow process;

Step 1211: with the step 311 of existing reorientation flow process, terminal sends RRC message such as physical channel and reconfigures and finish message or radio bearer Release complete to Target RNC, Target RNC sends reorientation to new SGSN and finishes message, initiates the reorientation complete process;

Step 1212: new SGSN SGSN transmission forwarding reorientation forward finishes message;

Step 1213: preceding SGSN sends out reorientation to new SGSN revolution and finishes acknowledgement message;

Alternatively, preceding SGSN is carried at reorientation with the AID-RID map information to client information and/or this terminal communication opposite end of this terminal and finishes and send to new SGSN in the acknowledge message, and preceding SGSN GGSN in the past obtain above-mentioned information.

Step 1214: after new SGSN receives that transmitting reorientation finishes acknowledgement message, for this terminal is selected new GGSN, and set up the PDP carrying of this terminal between this new GGSN and send the AID of this terminal to new GGSN, new GGSN is the new RID of terminal distribution, and is sent to new SGSN;

During based on framework two, send register requirement to this terminal attaching ILR by new GGSN; During based on framework one and framework three, send register requirement to this terminal attaching ILR by SGSN.

New SGSN can preserve receive to client information and safeguard that new SGSN also need send to new GGSN and preserve as receiving the map information of this terminal communication opposite end, send as the message set up by carrying or newly-increased message.

Step 1215: new SGSN SGSN forward sends renewal opposite end information request, carries the new RID of this terminal;

Step 1216: after preceding SGSN received this new RID, the RID that is initiated to the opposite end is new technological process more, with step 1008;

Preceding SGSN as having transmitted client information, can keep this to client information in this locality simultaneously in step 1213, and the RID that is accomplished to the opposite end upgrades the back and deletes this to client information.Certainly, also can not transmit, more client information be sent this terminal to new SGSN as transmitting by the response message that upgrades the opposite end information request again behind the new technological process at RID that step 1216 is accomplished to the opposite end to client information in step 1213.

Step 1217: GGSN deletion relevant bearer before the preceding SGSN notice, notification source RNC discharges the Iu mouth, with step 1012.

Step 1218: the routing update flow process, with step 1013.

The above-mentioned flow process of embodiment five can also have other change example, for example:

Become example one

This becomes in example, in the reorientation set-up procedure, after the new SGSN RELOCATION REQUEST message that SGSN sends receiving before, can be the new GGSN of this terminal selection earlier, and and this new GGSN between set up this terminal PDP carry.In the reorientation complete process, new SGSN no longer carries out the processing that GGSN selected and set up the PDP carrying, and other become example with above-mentioned embodiment five and other.

The difference of the network element that upgrades according to the RID that is initiated to the opposite end, it is routine to obtain following changes:

Become example two

This becomes in the example, at new GGSN or after newly SGSN is initiated to the RID register flow path of ILR, by new GGSN GGSN forward, perhaps by new SGSN forward SGSN request to client information, after receiving to client information, determine the address of opposite end gateway according to the AID that receives, send the RID update notification to the opposite end gateway to Correspondent Node in the client information.

Become example three

This change example is safeguarded on GGSN client information, on the basis of embodiment five, in step 1216, after preceding SGSN receives newly assigned RID, do not initiate more new technological process of RID, but new RID sent to preceding GGSN, by preceding GGSN according to the RID that client information is initiated to the opposite end of this terminal of preserving new technological process more, perhaps by preceding GGSN will preserve client information is sent to new SGSN after, the RID that is initiated to the opposite end by new SGSN is new technological process more.Specifically can and become example with reference to embodiment four.Before GGSN can also be according to should new RID setting up and the new forwarding passage of GGSN, the message that Correspondent Node in the handoff procedure is sent to this terminal is forwarded to new GGSN.

Become example four

By preceding SGSN to new SGSN send transmit that acknowledgement message is finished in reorientation or the message that sends before when transmitting re-positioning request, send the address information of preceding GGSN to new SGSN, new SGSN is when setting up the PDP carrying of this terminal with new GGSN, send this address information to new GGSN again, before new GGSN gets access to after the address information of GGSN, and set up the forwarding passage of this terminal between the preceding GGSN.

Transmit in the RID renewal with to client information, GGSN transmitted as the message of setting up flow process by the forwarding passage before new GGSN can send new RID to, before GGSN receive that the RID that is initiated to the opposite end behind this new RID upgrades, and this terminal that preceding GGSN is safeguarded client information is sent to new GGSN.Perhaps, client information (and/or AID-RID map information of this terminal communication opposite end) is sent to new GGSN sets up in the message of flow process as being carried at the tunnel of this terminal that to be safeguarded by preceding GGSN, new GGSN upgrades the RID that client information is initiated to the opposite end according to this.And new GGSN can be known newly-increased Correspondent Node by the data message of issuing this terminal that GGSN before checking transmits, and the not successful Correspondent Node of RID renewal, and the gateway that inserts to these Correspondent Nodes sends and send once more the RID update notification.

For the sub-district/URA of associating and the flow process of Serving Radio Network System reorientation, its difference with the reorientation flow process of the associating direct-cut operation in PS territory and terminal SGSN-spanning is wireless side, so does not influence the description of the foregoing description.Therefore, the switching that the present invention mentions can be based on the reorientation flow process of the associating direct-cut operation and the terminal SGSN-spanning in PS territory, also can be based on the sub-district/URA of associating and the flow process of Serving Radio Network System reorientation.

Correspondingly, the present invention also provides a kind of WCDMA core net, comprises critical point GPRS node (GGSN), service GPRS node (SGSN), the signatory register (HLR/HSS) of home subscriber and identity location register (ILR), wherein:

SGSN is used in the terminal cut process that relates to SRNS Serving Radio Network Subsystem between SGSN (SRNS) reorientation, select GGSN, when having selected new critical point GPRS node (GGSN), also set up the PDP carrying between new SGSN and this new GGSN and send the AID of this terminal to this new GGSN for this terminal;

GGSN is used to the new station location marker of this terminal distribution (RID), and preserves the map information of this terminal identity sign (AID) and this new RID;

GGSN or SGSN also are used for sending the RID register requirement to incision terminal attaching ILR, carry this new RID, and this terminal attaching ILR upgrades the RID of this terminal of preserving.

In the above flow process about RID registration, RID upgrade, to the transmission of the maintenance at the maintenance of client information and transmission, mapping letter place, the foundation in GGSN tunnel etc. except that mutual formation is conflicted, all but combination in any is used, the functional module of corresponding GGSN that obtains and SGSN is listed below, and special scene is limited.

Further,

SGSN comprises:

GGSN comprises:

Further,

SGSN also comprises the RID Registering modules, is used for sending register requirement to incision terminal attaching identity location register (ILR), carries the AID of this incision terminal and new RID; The incision control module of GGSN also is used for the new RID for the incision terminal distribution is sent to new SGSN; The incision control module of SGSN also is used for calling the RID Registering modules after receiving this new RID; Perhaps

GGSN also comprises the RID Registering modules, is used for sending register requirement to incision terminal attaching identity location register (ILR), carries the AID of this incision terminal and new RID; The incision control module of GGSN is called this RID Registering modules after also being used to obtain to cut the new RID of terminal.

Further, (corresponding SGSN safeguards the scene to client information)

SGSN also comprises opposite end maintenance of information module, be used for maintenance terminal to client information, comprise the correspondence relationship information of this terminal AID and Correspondent Node AID thereof;

The control module that cuts out of SGSN also is used at handoff procedure, cuts out terminal client information is sent to new SGSN and notifies opposite end maintenance of information module to stop to safeguard with what safeguard;

The incision control module of SGSN also is used at handoff procedure, the incision terminal that SGSN transmits before receiving to client information, notify the opposite end maintenance of information module of this SGSN to preserve and safeguard;

SGSN also comprises the RID update module, be used for finding the address of the gateway that Correspondent Node inserts according to incision terminal or the AID that cuts out terminal to the client information Correspondent Node, the gateway that inserts to Correspondent Node sends the RID update notification, carries this terminal AID and new RID.

Further, (corresponding SGSN safeguards client information and preceding SGSN is initiated the scene that RID upgrades)

The incision control module of GGSN also is used for the new RID for the incision terminal distribution is sent to new SGSN;

The control module that cuts out of SGSN also is used for after receiving the new RID that cuts out terminal that new SGSN transmits, and calling the RID update module is to cut out the RID renewal that terminal is initiated to the opposite end; And by transmit reorientation finish acknowledgement message transmit the SRNS context message or newly-increased message will be safeguarded cut out terminal client information is sent to new SGSN;

The incision control module of SGSN is that the forwarding re-positioning request at the incision terminal that SGSN sends before receiving is selected GGSN, and also is used for after receiving the new RID that new GGSN sends, and by transmitting relocation response message this new RID is sent to preceding SGSN.

Further, (corresponding SGSN safeguards client information and new SGSN is initiated the scene that RID upgrades)

The control module that cuts out of SGSN also is used for after receiving the forwarding relocation response message that new SGSN returns, finish acknowledgement message or transmit SRNS context message or newly-increased message by transmitting reorientation, with safeguard cut out terminal client information is sent to new SGSN;

The incision control module of SGSN is that the forwarding re-positioning request at the incision terminal that SGSN sends before receiving is selected GGSN, and also be used for incision terminal that before receiving SGSN transmits to behind the client information, call the RID update module and upgrade for the RID that the incision terminal is initiated to the opposite end.

Further, (corresponding GGSN safeguards the scene to client information)

GGSN also comprises opposite end maintenance of information module, be used for maintenance terminal to client information, comprise the correspondence relationship information of this terminal AID and Correspondent Node AID thereof;

The control module that cuts out of GGSN also is used at handoff procedure, with safeguard cut out terminal client information is sent to new GGSN;

The incision control module of GGSN also is used at handoff procedure, the incision terminal that GGSN transmits before receiving to client information, notify the opposite end maintenance of information module of this SGSN to preserve and safeguard;

GGSN also comprises the RID update module, is used for finding corresponding RID according to incision terminal of safeguarding or the AID to the client information Correspondent Node that cuts out terminal, and the gateway that inserts to Correspondent Node sends the RID update notification, carries this terminal AID and new RID.

Further, (corresponding GGSN safeguards client information and new GGSN is initiated the scene that RID upgrades)

The incision control module of GGSN also is used for after for the new RID of incision terminal distribution, by new SGSN, preceding SGSN forward GGSN send information request; And receive the incision terminal that sends to client information after, call the RID update module and upgrade for the RID that the incision terminal is initiated to the opposite end;

GGSN cuts out after control module also is used for information request that before receiving GGSN sends, and the AID-RID map information of safeguarding to client information and/or this terminal communication opposite end that cuts out terminal is sent to new GGSN through preceding SGSN, new SGSN;

Further, (corresponding GGSN safeguards client information and preceding GGSN is initiated the scene that RID upgrades)

The incision control module of GGSN also is used for sending the new RID for the incision terminal distribution to preceding GGSN;

GGSN cut out that control module is used for also that before receiving GGSN transmits cut out the new RID of terminal after, calling the RID update module is to cut out the RID renewal that terminal is initiated to the opposite end, after renewal was finished, the AID-RID map information to the Correspondent Node of client information and/or this terminal of this terminal that this preceding GGSN will be safeguarded was sent to new GGSN.

GGSN cuts out that control module also is used for when setting up this forwarding tunnel with new GGSN or after this forwarding tunnel is set up, the AID-RID map information to client information and/or this terminal communication opposite end that cuts out terminal is sent to new GGSN,

The incision control module of GGSN also be used for incision terminal that before receiving GGSN transmits to behind the client information, call the RID update module and upgrade for the RID that the incision terminal is initiated to the opposite end.

Further,

GGSN also comprises the map information maintenance module, be used at handoff procedure, receive behind the data message of incision terminal promptly at the AID-RID map information of the Correspondent Node of local maintenance this incision terminal, behind the AID-RID map information of the Correspondent Node of this terminal that the preceding GGSN that receives transmits with this AID-RID map information merging of local maintenance;

The control module that cuts out of GGSN also is used at handoff procedure, and the AID-RID map information of the Correspondent Node that cuts out terminal safeguarded is sent to new GGSN;

The incision control module of GGSN also is used at handoff procedure, the AID-RID map information of the Correspondent Node of the incision terminal that GGSN transmits before receiving, and notify the map information maintenance module of this SGSN to preserve and maintenance.

Further,

The packet forwarding module of GGSN is used for giving preceding SGSN with the data message forwarding of receiving that cuts out terminal of issuing, and gives new SGSN with the data message forwarding of receiving of issuing the incision terminal; The data message forwarding that the packet forwarding module of SGSN is used for issuing of receiving cut out terminal is to source wireless side network element, and the data message forwarding that will issue the incision terminal is to Target Wireless side network element; Perhaps

GGSN comprises that also transmitting passage sets up module, is used for setting up forwarding passage between this GGSN and the former GGSN at handoff procedure for the incision terminal, or sets up forwarding passage between this GGSN and the preceding GGSN for cutting out terminal; The packet forwarding module of GGSN be used for receive issue the data message that cuts out terminal after, issue new GGSN through this forwarding passage, and receive issue the incision terminal data message after, be transmitted to new SGSN; The data message forwarding that the packet forwarding module of SGSN is used for issuing of receiving cut out terminal is to source wireless side network element, with the data message forwarding of issuing the incision terminal received to Target Wireless side network element.

Further,

The incision control module of SGSN is that the forwarding re-positioning request at the incision terminal that SGSN sends before receiving is selected GGSN, and also is used for by transmitting relocation response the address information of new GGSN being sent to preceding SGSN; SGSN cut out control module receive new GGSN address information send preceding GGSN to; GGSN comprises that also transmitting passage sets up module, and is mutual with this new GGSN after the address information of the new GGSN that SGSN transmits before being used to receive, sets up and newly cut out between GGSN the forwarding passage of terminal; Perhaps

The incision control module of SGSN is that the forwarding re-positioning request at the incision terminal that SGSN sends before receiving is selected GGSN; The control module that cuts out of SGSN is sending to new SGSN when transmitting re-positioning request, sends the address information of preceding GGSN to new SGSN; The incision control module of SGSN sends new GGSN in the address information of setting up the preceding GGSN that the PDP carrying of this terminal the time will receive with new GGSN; GGSN comprises that also transmitting passage sets up module, be used for the address information of GGSN receiving before after, mutual with preceding GGSN, set up and preceding GGSN between this cut the forwarding passage of terminal.

Further,

The control module that cuts out of SGSN is to transmit reorientation when finishing acknowledgement message or transmitting re-positioning request sending to new SGSN, sends the address information of preceding GGSN to new SGSN; The incision control module of SGSN is that the address information of the preceding GGSN that will receive when the PDP carrying of setting up the incision terminal with new GGSN sends new GGSN to; GGSN comprises that also transmitting passage sets up module; After the address information of GGSN, call the forwarding passage and set up module before the incision control module of GGSN is received; The forwarding passage of GGSN set up that module is used for and preceding GGSN between the mutual forwarding passage of setting up the incision terminal.

Further, (corresponding GGSN safeguards the scene to client information)

The opposite end maintenance of information module of GGSN also be used for GGSN sends before preservation incision terminal to behind the client information, GGSN transmits the AID of Correspondent Node in the next data message of issuing this incision terminal before checking, as find that new Correspondent Node or RID upgrade not successful Correspondent Node, with the AID of new Correspondent Node register to this incision terminal in the client information, and send out update notification to the incision control module of this GGSN, carry the AID of these Correspondent Nodes;

After the incision control module of GGSN also is used to receive the update notification of opposite end maintenance of information module transmission, call gateway transmission and repeating transmission RID update notification that the RID update module inserts to these Correspondent Nodes.

Further,

When the RID update module of GGSN finds the address information of the gateway that Correspondent Node inserts according to the AID to Correspondent Node in the client information of this terminal, be the address information that inquires the gateway that Correspondent Node inserts according to the AID of this terminal communication opposite end from this locality configuration or Correspondent Node home subscribed services device (HLR/HSS) or dns server or ILR.

Further,

The incision control module of SGSN is to judge whether to select new GGSN according to location information of terminals and/or network configuration information, is being connected different GGSN as this new SGSN with preceding SGSN on physical connection, and then this new SGSN selects new GGSN; If new SGSN is being connected identical a plurality of GGSN with preceding SGSN, then new SGSN does the selection judgement according to zone, terminal position and/or APN.

Further,

The link information maintenance module of SGSN or GGSN is when safeguarding client information, be by flowing real-time testing mechanism and/or checking AID in the data message of this terminal, with the AID of the new Correspondent Node found register to this terminal in the client information, with the AID of the Correspondent Node of need deletion from this to deleting the client information.

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.

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. changing method based on the WCDMA core net 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. as claim 1 or 2 or 3 described changing methods, it is characterized in that:

5. as claim 1 or 2 or 3 described changing methods, it is characterized in that:

6. as claim 1 or 2 or 3 described changing methods, it is characterized in that:

7. as claim 2 or 6 described changing methods, it is characterized in that:

8. as claim 2 or 6 described changing methods, it is characterized in that:

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

10. as claim 1 or 6 described changing methods, it is characterized in that a kind of forwarding passage of between preceding GGSN and new GGSN, setting up this terminal in the following manner also in this handoff procedure:

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

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

13., it is characterized in that as claim 1 or 2 or 3 described changing methods:

14. changing method as claimed in claim 13 is characterized in that:

15. changing method as claimed in claim 13 is characterized in that:

16. changing method as claimed in claim 13 is characterized in that:

17., it is characterized in that as claim 13 or 16 described changing methods:

18., it is characterized in that as claim 11 or 12 or 16 described changing methods:

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

20., it is characterized in that as claim 2 or 14 or 16 described changing methods:

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

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

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

24., it is characterized in that as claim 2 or 3 described changing methods:

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

26. a WCDMA core net comprises critical point GPRS node (GGSN), service GPRS node (SGSN) and the home subscriber register (HLR/HSS) of contracting, and it is characterized in that, also comprises identity location register (ILR), wherein:

27. WCDMA core net as claimed in claim 26 is characterized in that:

Described SGSN comprises:

Described GGSN comprises:

28. WCDMA core net as claimed in claim 27 is characterized in that:

29., it is characterized in that as claim 27 or 28 described WCDMA core net:

30. WCDMA core net as claimed in claim 29 is characterized in that:

31. WCDMA core net as claimed in claim 29 is characterized in that:

32. WCDMA core net as claimed in claim 27 is characterized in that:

33. WCDMA core net as claimed in claim 32 is characterized in that:

34. WCDMA core net as claimed in claim 32 is characterized in that:

35. WCDMA core net as claimed in claim 27 is characterized in that:

36., it is characterized in that as claim 27 or 28 described WCDMA core net:

37., it is characterized in that as claim 27 or 28 described WCDMA core net:

38., it is characterized in that as claim 27 or 28 described WCDMA core net:

39. WCDMA core net as claimed in claim 27 is characterized in that:

40., it is characterized in that as claim 33 or 34 or 35 described WCDMA core net:

41. WCDMA core net as claimed in claim 27 is characterized in that:

42. WCDMA core net as claimed in claim 27 is characterized in that:

43. WCDMA core net as claimed in claim 27 is characterized in that:

44., it is characterized in that as claim 29 or 32 described WCDMA core net: