CN102123463B

CN102123463B - Wideband code division multiple access (WCDMA) core network and WCDMA core network-based switching method

Info

Publication number: CN102123463B
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: 2013-01-16
Anticipated expiration: 2030-01-12
Also published as: CN102123463A; WO2011085636A1

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 the 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 the 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 main effect 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 of user selection is to determine according to user's CAMEL-Subscription-Information and the Access Point Name of user's request in packet data protocol (PDP:Packet DataProtocol) context activation process as gateway.

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

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 Deta bearer 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 retransmission and transportation level that weakened.

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

Reorientation flow process completing 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 retransmission, routing update.

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

-SRNS Serving Radio Network Subsystem (SRNS) reorientation;

Direct-cut operation and the SRNS reorientation of-associating;

Residential quarter/URA and the SRNS reorientation of-associating;

-SRNS reorientation cancellation.

Wherein, front 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 the second.

The below describes repositioning process as an example of associating direct-cut operation and SRNS reorientation example, and without the Iur interface, and this process is only carried out when MS is in packet domain mobile management-connection (PMM-CONNECTED) state between the RNC.

When associating direct-cut operation and SRNS repositioning process are used for carrying out the direct-cut operation that is determined by UTRAN, from source RNC to Target RNC, UTRAN is moved to the CN tie point in the UTRAN side.In this process, the Iu link is relocated.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 from 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 front SGSN and the front 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 associating direct-cut operation and the SRNS reorientation in PS territory;

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

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: front SGSN is according to Target cell ID, as determining that the SRNS reorientation is the SRNS reorientation between SGSN, send " transmitting re-positioning request (Forward Relocation Required) " message and initiate the reorientation resource allocation process to new SGSN;

Step 304a: new SGSN sends RELOCATION REQUEST message to Target RNC; According to the positional information of the terminal of asking 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 Target RNC transparent vessel and the RAB (RAB) that will arrange 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 is to new SGSN;

Comprise in the re-positioning request acknowledgement message: Target RNC to source RNC transparent vessel, RAB arranges, the RAB of setup failed etc.Transparent vessel comprise that MS switches needs all be complete RRC message (reconfiguring such as the physical channel) with wireless relevant information, send to pellucidly MS 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 arrange (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 front 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: front SGSN sends reorientation order (Relocation Command) message to 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 retransmission restriction.Front SGSN determines to be subjected to the RAB of data retransmission restriction according to QoS, and those RAB should be included among the RAB that is subjected to the data retransmission restriction.

Step 307: after source RNC received the reorientation command messages from the PS territory, the log-on data repeating timer began as being subjected to the RAB forwarding data of data retransmission restriction;

Data retransmission 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 copies in the RNC of source and send to Target RNC at the IP layer.

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 front 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 occurs the SRNS context to be moved to Target RNC from source RNC.Target RNC resets and is connected the RLC connection, and exchanges PDCP sequence number (PDCP-SNU, PDCP-SND) between Target RNC and MS.

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 radio bearer Release complete to 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 to new SGSN, initiate the reorientation complete process.

Step 312, new SGSN sends the forwarding reorientation and finishes the front SGSN of (Forward Relocation Complete) message informing, the SRNS repositioning process is finished, and front 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 to relevant GGSN, carry new SGSN address, SGSN endpoint of a tunnel identifier and agreed QoS.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, front SGSN sends Iu release command (IuRelease Command) message to source RNC, when RNC data retransmission 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 positional information that MS is current is registered in new SGSN, and a new SGSN information updating is in HLR.One subset 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.In the situation that the user is moved, might move on to the place far and nearer apart from service source apart from GGSN like this, thereby cause the path circuitous.

Use static publicly-owned address as the IP address of terminal, can considerable restraint be arranged to user's mobility.Static public ip address can only be out from fixing gateway owing to route planning.In case move to far place, can't access 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 again built carrying.

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, such as Host Based realization such as HIP technology, and based on realization such as location identity separated protocol (LISP) technology of router, there are again relevant multiple technologies to support 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 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, route and the forwarding of the inter-terminal data message that backbone network is responsible for accessing.In the network, AID remains constant as the User Identity of terminal in the fast mobile terminal process; 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, such as mobile phone, landline telephone, computer and server etc.

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 be through ASN access backbone network.ASN is the address information that the RID of terminal distribution comprises this ASN, points in other words this ASN, and during as the destination address of data message, this data message will be routed to this ASN with this RID.

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

Identity location register (ILR:Identity Location Register), ILR is used for preserving and safeguarding 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, process registration to terminal location, go registration and inquiry;

Alternatively, backbone network can also comprise:

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

Interconnect services node (ISN) has the interface with generic router, ASN and ILR, is used for realizing interconnecting of two networks.

Above-mentioned ILR, or ILR and PTF consisted of the mapping forward plane of backbone network, CR, or CR and ISN have consisted of the broad sense Forwarding plane of backbone network.

In the SILSN framework, the form of the data message of transmitting between ASN is 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 for being addressed to the ASN of this terminal access, and the RID of Correspondent Node is used for being addressed to the ASN of Correspondent Node access.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, comprise in the data message of terminal AID and Correspondent Node AID as source address is encapsulated in take terminal RID, be forwarded to the ASN of Correspondent Node access 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 mapping forward plane, perhaps in message, after inquiring the RID of Correspondent Node, carry out RID encapsulation and forward process by above-mentioned in the mode of local search during to the RID of Correspondent Node by this ASN again.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.

Can find out that ASN need to 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 accesses.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 each this terminal of terminal maintenance 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 in application, such as being connected with traditional IP, borde gateway is to inquiry and the authentication process of the forward process of data message, data message form, signaling, processing of mobile management etc. 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 effectively solved.

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 registration request 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 front 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 front SGSN also will safeguard client information is sent to this new SGSN; Front 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, to the gateway transmission RID update notification of described Correspondent Node access, carry 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 front 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; Front GGSN or new GGSN find the RID of this terminal communication opposite end from this locality, to the gateway transmission RID update notification of described Correspondent Node access, 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 front GGSN will safeguard is sent to new GGSN, new GGSN receives behind the data message of this terminal namely 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 front GGSN receives the data message of issuing this terminal, issue source wireless side network element through front SGSN, be forwarded to the target side network element through the forwarding channel 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 channel before setting up between GGSN and the front GGSN after front GGSN receives the data message of issuing this terminal, is issued new GGSN through this forwarding channel, 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 alternately the PDP carrying of this terminal 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 registration request 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 registration request 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 front SGSN by transmitting relocation response message with this new RID, after this front SGSN receives this new RID, 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, gateway to described Correspondent Node access 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 of this Correspondent Node access.

After front 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 of Correspondent Node access according to this AID to Correspondent Node in the client information, sends the RID update notification to the gateway of described Correspondent Node access.

This new GGSN is after being the new RID of terminal distribution, by new SGSN, front SGSN forward GGSN send information request, after front 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 front SGSN, new SGSN, the AID to Correspondent Node in the client information that new GGSN basis is received inquires the RID of Correspondent Node, to the gateway transmission RID update notification of Correspondent Node access.

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

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

Mode two, front SGSN is when sending the forwarding re-positioning request to new SGSN, send the address information of front 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 front GGSN, the forwarding channel of this terminal between foundation and front GGSN;

After this forwarding channel was set up, the message that sends to this terminal that front 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 forwarding channel adopts mode one to set up, and the address information of this GGSN is the new RID of this terminal; Perhaps, this forwarding channel adopts mode two to set up, and the message RID that this terminal is new when new SGSN sets up by forwarding channel issues this front GGSN;

After this front GGSN receives the new RID of this terminal, 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, gateway to described Correspondent Node access 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 front GGSN is sent to new GGSN.

When front GGSN sets up this forwarding tunnel with new GGSN or after this forwarding tunnel is set up, front 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, gateway to described Correspondent Node access 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 registration request 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 registration request to this terminal attaching ILR.

This new GGSN is sent to new SGSN with this new RID, and this new SGSN is sent to front SGSN with this new RID; After front SGSN receives, 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, to the gateway transmission RID update notification of described Correspondent Node access, carry the AID of this terminal and new RID; 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, client information is sent to new SGSN the preserving and safeguard of this terminal that will safeguard again.

After this new GGSN or new SGSN send the RID registration request to this terminal attaching ILR, 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, to the gateway transmission RID update notification of described Correspondent Node access.

This new GGSN is sent to new SGSN with this new RID, and this new SGSN is sent to front SGSN with this new RID; After front SGSN received, the RID that this is new sent to front 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 update notification of described Correspondent Node access; 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, to the gateway transmission RID update notification of described Correspondent Node access.

When SGSN finishes acknowledgement message or transmits re-positioning request to new SGSN transmission forwarding reorientation before being somebody's turn to do, send the address information of front 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, after new GGSN gets access to the address information of front GGSN, and set up the forwarding channel of this terminal between the front GGSN;

This new GGSN receive that front GGSN sends 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, gateway to the access of 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 refers to the associating direct-cut operation in PS territory and the repositioning process of terminal SGSN-spanning, or the residential quarter/URA of associating and the process of Serving Radio Network System reorientation.

When front SGSN or new SGSN find the address information of gateway of Correspondent Node access according to the AID to Correspondent Node in the client information of this terminal, it is the address information that inquires the gateway of Correspondent Node access 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 of the Correspondent Node that inquires access 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 of the Correspondent Node access that inquires is SGSN, after the gateway of this Correspondent Node access is received the RID update notification, also to send the RID update notification to the GGSN of this Correspondent Node access; 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 accessed 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 positional information and/or the network configuration information of terminal, as this new SGSN be connected SGSN and connecting different GGSN in physical connection, then this new SGSN selects new GGSN; If new SGSN be connected SGSN and connecting identical a plurality of GGSN, then new SGSN does according to zone, terminal position and/or APN and selects to judge.

The GGSN of this new GGSN as accessing after having selected front 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 registration request 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 for 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, receive that front SGSN sends for 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, being released to the resource that this cuts out terminal distribution;

Cutting control module, behind the AID for the forwarding re-positioning request of the transmission of SGSN before receiving and the incision terminal of newly SGSN transmission, call the RID distribution module, is that this PDP that cuts between terminal foundation and this new SGSN carries;

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 carried out forward process.

Described SGSN also comprises the RID Registering modules, is used for sending registration request 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 and will be sent to new SGSN for the new RID of incision terminal distribution; 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 registration request 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 obtaining calling this RID Registering modules behind the new RID of incision 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 according to incision terminal or the AID to the client information Correspondent Node that cuts out terminal the address of the gateway of Correspondent Node access, gateway to described Correspondent Node access sends the RID update notification, carries this terminal AID and new RID.

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

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 for 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, by transmitting relocation response message this new RID be sent to front SGSN.

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 for the incision terminal that SGSN sends before receiving is selected GGSN, and also be used for SGSN transmits before receiving incision terminal 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 the incision terminal of safeguarding or the AID to the client information Correspondent Node that cuts out terminal, gateway to described Correspondent Node access 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, front 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;

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

The incision control module of described GGSN also is used for and will sends front GGSN to for the new RID of incision terminal distribution;

Described GGSN cut out that control module is used for also that GGSN transmits before receiving 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 front GGSN will be safeguarded was sent to new GGSN.

The control module that cuts out of described GGSN 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 being sent to new GGSN,

The incision control module of described GGSN also be used for GGSN transmits before receiving incision terminal 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 namely 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 front 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 safeguard.

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

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

The incision control module of described SGSN is that the forwarding re-positioning request for 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 front SGSN; Described SGSN cut out control module receive new GGSN address information send front GGSN to; Described GGSN comprises that also forwarding channel sets up module, and is mutual with this new GGSN after the address information of the new GGSN that is used for receiving that front SGSN transmits, sets up and the forwarding channel that newly cuts out terminal between GGSN; Perhaps

The incision control module of described SGSN is that the forwarding re-positioning request for 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 front GGSN to new SGSN; The incision control module of described SGSN sends new GGSN in the address information of setting up the front GGSN that PDP when carrying of this terminal will receive with new GGSN; Described GGSN comprises that also forwarding channel sets up module, be used for the address information of GGSN before receiving after, mutual with front GGSN, set up with front GGSN between this cut the forwarding channel 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 front GGSN to new SGSN; The incision control module of described SGSN is that the address information of the front 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 forwarding channel sets up module; After the incision control module of described GGSN is received the address information of front GGSN, call described forwarding channel and set up module; The forwarding channel of described GGSN set up that module is used for and front GGSN between the mutual forwarding channel 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 for receiving the update notification of opposite end maintenance of information module transmission, calls the RID update module to the gateway transmission of these Correspondent Nodes accesses and retransmit the RID update notification.

When the RID update module of described GGSN finds the address information of gateway of Correspondent Node access according to the AID to Correspondent Node in the client information of this terminal, it is the address information that inquires the gateway of Correspondent Node access 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 the positional information of terminal and/or network configuration information, as this new SGSN be connected SGSN and connecting different GGSN in physical connection, then this new SGSN selects new GGSN; If new SGSN be connected SGSN and connecting identical a plurality of GGSN, then new SGSN does according to zone, terminal position and/or APN and selects to judge.

The link information maintenance module of described SGSN or GGSN is 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.

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 affect the consistency of existing reorientation flow process as far as possible based on existing reorientation flow process, have preferably feasibility.

Description of drawings

Description of drawings is used to provide a further understanding of the present invention, and consists of the part of specification, is used for together with embodiments of the present invention explaining the present invention, is not construed as limiting the invention.

Fig. 1 a is the Organization Chart in existing WCDMA nested design territory;

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 front 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 is the schematic diagram that the present invention has the WCDMA core net framework one of SILSN framework;

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

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

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 to switch without fixed anchor point.SILSN framework and operation principle thereof according to the background technology record can be understood, and when fast mobile terminal was striden the switching of 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 rapidly target ASN, can send the RID update notification to the gateway of Correspondent Node access.Source ASN can also transmit to target ASN the AID-RID map information to client information and/or all Correspondent Nodes of this terminal.In addition, in handoff procedure, source ASN need to 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, for the RID that registers, goes registration terminal to ILR.GGSN is terminal distribution RID.Also have signaling interface between GGSN and the ILR, be used for the 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, for the RID that registers, goes registration terminal to ILR, 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 safeguarding at SGSN and/or GGSN client information of terminal.

Situation for the direct-connected tunnel shown in Fig. 1 b does not affect 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 for 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 to client information that at GGSN the same prior art of reorientation flow process does not change.

Hereinafter mainly for being described in the improvement that original system carries out without the fixed anchor point switching for realizing, comprise relevant function and flow process.

In the literary composition, as former side network element terminal is switched when processing describing certain network element, claimed this terminal for cutting out terminal; As the target side network element terminal is switched when processing describing certain network element, claimed this terminal to be the incision terminal.In the literary composition, also with the network element of the Correspondent Node of terminal access referred to as the opposite end network element; 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 of this network element of access.

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." transmit reorientation and finish message " message that front SGSN sends to new SGSN by the reorientation complete process 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;

Wherein new SGSN can judge whether to need to select new GGSN after receiving the forwarding RELOCATION REQUEST message that front SGSN sends, and 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 forward SGSN 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 front 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 front SGSN do not preserve this terminal to client information, can finish to carry in receiveing the response in reorientation have this to the indication information of client information.

Step 805: new SGSN forward SGSN 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.The message that front SGSN sends to new SGSN by the reorientation set-up procedure 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: source RNC determines to initiate switching flow, with step 301;

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

Step 903: front SGSN sends to new SGSN and transmits RELOCATION REQUEST message, carry in the message this terminal that original parameter information and front 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 positional information and/or the network configuration information of terminal.For example, if new SGSN be connected SGSN and connecting different GGSN in physical connection, so new SGSN selects new GGSN, new SGSN can know the address of old GGSN from the context.If new SGSN be connected SGSN and all connecting identical a plurality of GGSN, so new SGSN can do according to zone, terminal position and/or APN and select to judge.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, front SGSN will be sent to new SGSN to client information by existing message, but the present invention is not limited thereto, also can by front SGSN to new SGSN send new message transmit terminal to client information.

Following embodiment all for be that the scene that GGSN changes occurs 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 (such as GGSN, also may be the border gateways such as ISN) and initiate the RID renewal.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 sends to the message of this terminal to Correspondent Node forwarding and can use Fig. 3 a, 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 alternately this terminal 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 the second framework, namely only have 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 message that the backward new GGSN of the RAB of this terminal sends such as newly-increased message, send registration request (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 registration request to this terminal attaching ILR, carries the AID of this terminal and new RID;

After this ILR receives the RID registration request, the RID in this terminal AID-RID map information of preserving is updated to this new RID, has also namely upgraded the AID-RID map information of this terminal.

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

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

The 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 restriction.

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

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.

After more new technological process begins, for the Correspondent Node of all registered and new registrations, front SGSN will send the RID update notification to the gateway of its access to front SGSN, can both be routed to new GGSN to guarantee the message that all Correspondent Nodes of this terminal send at the RID to the opposite end.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 that check 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.Front 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: front SGSN sends the reorientation command messages to source RNC, carries out the reorientation implementation, with step 306 to 310;

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

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 forward SGSN transmission forwarding reorientation finishes message, and front SGSN returns the forwarding reorientation to new SGSN and finishes acknowledgement message, with step 313;

Front SGSN is communicated to new SGSN by what transmit that reorientation finishes this terminal that acknowledgement message will safeguard to client information, and newly SGSN preserves this to client information and safeguards.In other examples, front 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 front SGSN received message, notification source RNC discharged the Iu mouth, GGSN deletion relevant bearer before the notice;

Front GGSN also deletes the AID-RID map information of this terminal of local maintenance after receiving the notice of deletion relevant bearer, deletes the AID-RID map information that has not had the Correspondent Node of correspondence in this terminal communication opposite end with the other-end of the front GGSN of access.

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 the renewal to this terminal RID information.

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

In the above-mentioned flow process, front 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 by Target RNC, new SGSN and new GGSN and outside packet data network communication, be carried out the RID encapsulation of message by new GGSN] decapsulation and forwarding, thereby realized switching without 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 various ways is arranged again:

Mode one

In step 1003, front 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 forward SGSN returns the new RID that does not carry when transmitting relocation response message as terminal distribution, in addition, need to send the RID update notification to client information to the opposite end gateway according to what preserve.

Cancellation step 1008.

Under the manner, front SGSN transmits and detects proceeding real-time streams after the client information, notifies new SGSN with the AID of the new Correspondent Node found.This detection can or postpone to finish behind the timing when receiving the forwarding relocation response message again.

Mode two

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

Cancellation step 1008.

Front 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 backward opposite end initiates RID and upgrade.

Under the manner, because front SGSN transmits client information after the ILR registration updating at new SGSN or new GGSN again, therefore newly-increased Correspondent Node can send to downlink message new GGSN, and front 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, front SGSN forward GGSN send information request, after front SGSN receives this information request, this terminal is sent to new GGSN to client information through front SGSN, new SGSN.New GGSN is at the message that just may receive this terminal after the ILR registration, after new GGSN is the new RID of this terminal distribution, according to the message of this terminal of receiving client information is safeguarded (such as the AID of Correspondent Node in the detection messages and/or carry out real-time streams and detect 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 above-mentioned front SGSN was sent to new SGSN also can be the AID-RID map information (comprising client information) of this terminal communication opposite end, or comprises simultaneously the AID-RID map information to client information and this terminal communication opposite end.

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 channel by between GGSN before the signaling interface foundation between the GGSN and the new GGSN utilizes this forwarding channel 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 the step 301 that has the reorientation flow process now～303;

Step 1104～1107: with step 1004～1007, new SGSN selects new GGSN for this terminal, set up alternately the PDP carrying of this terminal 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 to ILR, and by transmitting the re-positioning request response message this new RID is sent to front SGSN;

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: front SGSN forward GGSN sends signaling, notifies this terminal RID that renewal has occured, and carries the AID of this terminal and new RID; After front GGSN receives this signaling, set up the forwarding channel 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;

Front GGSN can obtain according to new RID the address information of new GGSN, thus set up and new GGSN between forwarding channel.Safeguard the AID-RID map information to the Correspondent Node of client information and this terminal that this terminal is arranged among front GGSN or the new GGSN, 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 front GGSN, the signaling that sends to new GGSN such as GGSN before when setting up forwarding channel 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 by the modes such as message that check this terminal client information is safeguarded to this terminal behind the terminal distribution RID, receive that front GGSN sends 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 front GGSN and new GGSN and safeguard respectively, is processed by the mode that new GGSN merges.

After front GGSN sets up with the forwarding channel of new GGSN, the message that sends to this terminal that front GGSN receives just directly is forwarded to new GGSN, after receiving, new GGSN sends to Target RNC by new SGSN, front GGSN transmits separating the RID encapsulation by front 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 be again by source RNC to the Target RNC forwarding data.Data message as for terminal sends before switching to Target RNC, or is forwarded to the broad sense Forwarding plane through source RNC, front SGSN, front GGSN, after switching to Target RNC, then can be through Target RNC, and new SGSN and new GGSN transmit.

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

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

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

Step 1112: with step 1012, front SGSN and front 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

It is different that this change example and above-mentioned flow process are set up between the GGSN mode of forwarding channel.In this change example, sent to new SGSN when transmitting re-positioning request by front SGSN, send the address information of front 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, after new GGSN gets access to the address information of front GGSN, and set up the forwarding channel of this terminal between the front GGSN.At this moment, front SGSN does not need new RID is sent to front GGSN, does not need to send signaling yet, informs that renewal has occured this terminal of front GGSN RID.At this moment, be initiated in this way the registration updating of ILR 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 that checks front GGSN forwarding, as find that new Correspondent Node or RID upgrade not successful Correspondent Node, gateway to these Correspondent Node accesses 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 front 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 channel before can adopting simultaneously embodiment four and becoming the method foundation of between GGSN, setting up forwarding channel of mentioning in the example 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 in the reorientation complete process again.

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 the step 301 that has the reorientation flow process now～310;

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 forward SGSN transmission forwarding reorientation finishes message;

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

Alternatively, front 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 front SGSN in the past GGSN 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 registration request by new GGSN to this terminal attaching ILR; During based on framework one and framework three, send registration request by SGSN to this terminal attaching ILR.

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 such as the message set up by carrying or newly-increased message.

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

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

Front SGSN can keep this to client information in this locality simultaneously in step 1213 as transmitted client information, after the RID that is accomplished to the opposite end upgrades deletion this to client information.Certainly, also can not transmit client information in step 1213, 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.

Step 1217: GGSN deletion relevant bearer before the front 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 before receiving, can select new GGSN for this terminal first, 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 client information, determine the address of opposite end gateway according to the AID to Correspondent Node in the client information that receives, send the RID update notification to the opposite end gateway.

Become example three

This change example is safeguarded at GGSN client information, on the basis of embodiment five, in step 1216, after front SGSN receives newly assigned RID, do not initiate more new technological process of RID, but new RID sent to front GGSN, by front 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 front 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.Front GGSN can also according to the forwarding channel of this new RID foundation with new GGSN, send to Correspondent Node in the handoff procedure message repeating of this terminal to new GGSN.

Become example four

By front 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 front 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, after new GGSN gets access to the address information of front GGSN, and set up the forwarding channel of this terminal between the front GGSN.

Transmit in the RID renewal with to client information, new GGSN can send new RID to front GGSN and transmit such as the message by the forwarding channel Establishing process, front GGSN receives that the RID that is initiated to the opposite end behind this new RID upgrades, and this terminal that front GGSN is safeguarded client information is sent to new GGSN.Perhaps, this terminal that to be safeguarded by front GGSN client information (and/or AID-RID map information of this terminal communication opposite end) is sent to new GGSN as in the message that is carried at the building tunnel flow process, 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 checking the data message of issuing this terminal that front GGSN transmits, and the not successful Correspondent Node of RID renewal, and the gateway that accesses to these Correspondent Nodes sends and again send the RID update notification.

For the residential quarter/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 affect the description of above-described embodiment.Therefore, the switching that the present invention mentions can be based on the reorientation flow process of associating direct-cut operation and the terminal SGSN-spanning in PS territory, also can be based on the residential quarter/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 registration request 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 mutual formation is conflicted, all but combination in any is used, the functional module of the 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 registration request 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 and will be sent to new SGSN for the new RID of incision terminal distribution; 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 registration request 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 obtaining calling this RID Registering modules behind the new RID of incision 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 according to incision terminal or the AID to the client information Correspondent Node that cuts out terminal the address of the gateway of Correspondent Node access, gateway to the Correspondent Node access sends the RID update notification, carries this terminal AID and new RID.

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

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

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 for 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 front 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 for the incision terminal that SGSN sends before receiving is selected GGSN, and also be used for SGSN transmits before receiving incision terminal 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 the incision terminal of safeguarding or the AID to the client information Correspondent Node that cuts out terminal, sends the RID update notification to the gateway of Correspondent Node access, 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, front 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;

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

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

The incision control module of GGSN also is used for and will sends front GGSN to for the new RID of incision terminal distribution;

GGSN cut out that control module is used for also that GGSN transmits before receiving 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 front GGSN will be safeguarded was sent to new GGSN.

The control module that cuts out of GGSN 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 being sent to new GGSN,

The incision control module of GGSN also be used for GGSN transmits before receiving incision terminal 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 namely 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 front 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 safeguard.

Further,

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

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

Further,

The incision control module of SGSN is that the forwarding re-positioning request for 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 front SGSN; SGSN cut out control module receive new GGSN address information send front GGSN to; GGSN comprises that also forwarding channel sets up module, and is mutual with this new GGSN after the address information of the new GGSN that is used for receiving that front SGSN transmits, sets up and the forwarding channel that newly cuts out terminal between GGSN; Perhaps

The incision control module of SGSN is that the forwarding re-positioning request for 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 front GGSN to new SGSN; The incision control module of SGSN sends new GGSN in the address information of setting up the front GGSN that PDP when carrying of this terminal will receive with new GGSN; GGSN comprises that also forwarding channel sets up module, be used for the address information of GGSN before receiving after, mutual with front GGSN, set up with front GGSN between this cut the forwarding channel 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 front GGSN to new SGSN; The incision control module of SGSN is that the address information of the front 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 forwarding channel sets up module; After the incision control module of GGSN is received the address information of front GGSN, call forwarding channel and set up module; The forwarding channel of GGSN set up that module is used for and front GGSN between the mutual forwarding channel 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 for receiving the update notification of opposite end maintenance of information module transmission, calls the RID update module to the gateway transmission of these Correspondent Nodes accesses and retransmit the RID update notification.

Further,

When the RID update module of GGSN finds the address information of gateway of Correspondent Node access according to the AID to Correspondent Node in the client information of this terminal, it is the address information that inquires the gateway of Correspondent Node access 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 the positional information of terminal and/or network configuration information, as this new SGSN be connected SGSN and connecting different GGSN in physical connection, then this new SGSN selects new GGSN; If new SGSN be connected SGSN and connecting identical a plurality of GGSN, then new SGSN does according to zone, terminal position and/or APN and selects to judge.

Further,

The link information maintenance module of SGSN or GGSN is 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.

Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and be carried out by calculation element, perhaps they are made into respectively each integrated circuit modules, 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 modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, 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:

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

Wherein, the SGSN in this WCDMA core net be responsible for safeguarding this terminal to client information, in this handoff procedure, this terminal that this front SGSN also will safeguard client information is sent to this new SGSN;

Perhaps, the GGSN in this WCDMA core net be responsible for safeguarding this terminal to client information, in this handoff procedure, this terminal that this front GGSN also will safeguard client information is sent to this new GGSN.

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

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

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

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

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

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

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

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

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

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

10. changing method as claimed in claim 6 is characterized in that, a kind of forwarding channel of setting up this terminal between front GGSN and new GGSN 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. such as claim 1 or 2 or 3 described changing methods, it is characterized in that:

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

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

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

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

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. changing method as claimed in claim 2 or claim 3 is characterized in that:

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:

Described SGSN is used in the terminal cut process that relates to SRNS Serving Radio Network Subsystem between SGSN (SRNS) reorientation, receive that front SGSN sends for the forwarding re-positioning request of incision terminal or transmit after reorientation finishes acknowledgement message, 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;

After described GGSN is used for receiving the AID of the forwarding re-positioning request of front SGSN transmission and the incision terminal that new SGSN transmits, be the new station location marker of this terminal distribution (RID), and preserve the map information of this terminal identity sign (AID) and this new RID;

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

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:

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

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

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

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

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

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

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, it is characterized in that: the incision control module of described SGSN is to judge whether to select new GGSN according to the positional information of terminal and/or network configuration information, as this new SGSN be connected SGSN and connecting different GGSN in physical connection, then this new SGSN selects new GGSN; If new SGSN be connected SGSN and connecting identical a plurality of GGSN, then new SGSN does according to zone, terminal position and/or APN and selects to judge.

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