CN102056151A

CN102056151A - System for implementing mobile communication based on WCDMA core network and terminal access method

Info

Publication number: CN102056151A
Application number: CN2009102084689A
Authority: CN
Inventors: 王志海; 吴强; 符涛
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2009-11-01
Filing date: 2009-11-01
Publication date: 2011-05-11
Anticipated expiration: 2029-11-01
Also published as: WO2011050724A1; CN102056151B

Abstract

The invention discloses a system for implementing mobile communication based on a WCDMA (Wideband Code Division Multiple Access) core network and a terminal access method. The system comprises a wireless access network, a service GPRS (General Packet Radio Service) node (SGSN Serving GPRS Supporting Node), a gateway GPRS node (GGSN Gateway GPRS Supporting Node), and an identity location register (ILR) connected with the SGSN and/or the GGSN, wherein the GGSN is used for maintaining the session connection of a terminal, allocating an RID (Radio Identifier) to the terminal, directly or indirectly inquiring the RID of a communication end to the ILR, maintaining Access Identifiers (AID) and RID mapping information of the terminal and the communication end, implementing the routing and forwarding of data messages and controlling the cross-GGSN switching of the terminal; the SGSN or the GGSN is used for registering and deregistering the RID of the terminal to the ILR; and the ILR is used for receiving a registering request and a deregistering request to a home subscriber terminal thereof, maintaining AID-RID mapping information of the home subscriber terminal, receiving an inquiry request to the RID of the terminal and returning the RID in the request, corresponding to the AID of the terminal, to an inquiry requester.

Description

Realize the system and the terminal access method of mobile communication based on the WCDMA core net

Technical field

The present invention relates to moving communicating field, particularly relate under WCDMA core network system framework, realize the system of mobile communication and the method that terminal inserts this system.

Background technology

Existing WCDMA system is current important system and the method that realizes service access based on wireless WCDMA technology.Its core network architecture as shown in Figure 1a.

This system has defined following critical function in order to finish effective access of user:

● network access control functions

● packet routing and transfer functions

● the mobile management function

● logical link management functions

● radio resource management function

● Network Management Function

Wherein, the funtion part relevant with the present invention comprises network insertion control, grouping route and forwarding, and the mobile management function.

Network insertion is the user is used for being connected to a telecommunication network in order to use the professional and/or convenient of that network a way.An access protocol is the process of a cover definition, makes the user can use the professional and/or convenient of network.User network inserts and can take place from the mobile side of network, and perhaps the fixation side from network takes place.The fixed network interface can be supported the multiple access protocol of outer data network, such as IP.The access protocol group of supporting is determined by PLMN network operator.Network insertion control can be divided into:

● registration function

Registration is that the mobile ID of user terminal is associated with user's packet data protocol and the address in the PLMN net, and the means that arrive the user access point of outside PDP network.Association can be static, such as, be stored in the signatory register (HLR or HSS are expressed as HLR/HSS) of user attaching, or dynamic, such as, distribute by each Demand Base.

● identify and authorization function

This function is finished discriminating and the authentication of service requester, and the affirmation of service request type, makes the user be authorized to use the particular network business.Authentication functions and mobile management function association ground are carried out.

● admission control function

The purpose of access control is the Quality of Service that the Internet resources of computation requirement provide request, if those resources of decision can be used, keeps those resources so.Access control is carried out with radio resource management function relatedly, so that evaluating wireless resource requirement in each sub-district.

● the message screening function

Need about the function of shielding of message that filters out unauthorized or not request.This will support by the packet filtering function.All types of message screenings are left network operator's control for, such as, adopt the Internet fire compartment wall.

● packet terminal adaptation function

This function is adaptive from terminal equipment packet to that receive and that send to a terminal equipment suitable form that transmits by packet field network.

● the billing data acquisition function

Signatory and/or the required data of traffic expense of this function collection support.

Grouping route and forwarding are used for data message is sent to suitable destination according to certain path.Route is an ordered list that is used in PLMN (cellular mobile communication networks) and transmits each node of message between the PLMN.Each route comprises source node, zero or a plurality of via node and destination node.Routing procedure is according to set of rule, the process of decision and use certain route of message transfer in PLMN and between the PLMN.Realize the grouping route and transmit needing a series of subfunction, comprising:

● relay function

Relay function is the method for changeing the data that receive from the last node next node to the route before the node.

● routing function

The network node that the routing function decision message will preceding be forwarded to, and the bottom service that determines to be used for arriving that GPRS Support Node (GSN) are by the destination address of message.Routing function is chosen the transmission path of next jumping in route.

Transfer of data between GSN can be crossed over outer data network, and outer data network provides themselves inside routing function, as X.25, and frame relay or atm network.

● address translation and mapping function

Address translation is the conversion of an address to another dissimilar address.Address translation can be used to be used in the PLMN to an external network protocols address mapping to one and the internal network address of routing packets between the PLMN.

Map addresses is to be route and relay message in PLMN and between the PLMN, is used for shining upon the network address of a network address to another same type.Such as from a network node forward packets to another node.

● encapsulation function

Encapsulation be in PLMN and between routing packets extra address and control information on data cell.Decapsulation is to obtain the initial data unit from dividing into groups removal addressing and control information.

Encapsulation is conciliate and to be encapsulated between the packet domain PLMN support node and to finish between serving GPRS support node and MS.

● tunnelling function

Tunnelling function is the transmission of decorateeing from the encapsulation point to the deblocking in PLMN and between the PLMN encapsulated data units.

Among the WCDMA, employing GTP agreement is finished encapsulation and the tunnel transmission at this WCDMA core net network internal data message.

● compression function

Compression function keeps the information that comprises wherein simultaneously by the least possible SDU of transmission (such as, outside PDP PDU), optimizes the use to the capacity of wireless path.Having only IP packet header to be compressed among the UMTS supports.

● encryption function

The encryption function preservation is by the user data of wireless channel transmission and the confidentiality of signaling, and prevents the invasion to PLMN.

● domain name server function

Domain name server function resolution logic GSN name is to the GSN address.This function is the Internet function of standard, according to RFC1034, allows to resolve any title for GSN with other nodes in packet domain PLMN backbone networks.

The mobile management function is used to keep the tracking to the MS current location in PLMN or in another PLMN.It passes through definition user's current state, positional information, relevant bearer information and the realization of the corresponding mobile management process mobility service to the user, and important flow process comprises routing update flow process, switching flow or the like.

The above-mentioned core net function of WCDMA system is distributed in the core network element.These network elements comprise:

The signatory register (HLR/HSS) of service GPRS node (SGSN), critical point GPRS node (GGSN) and user attaching etc.

SGSN is the basic composition network element of of GPRS network, is a new network element device of introducing in the GSM network for gprs service is provided.Its significant feature is exactly the IP grouping of transmitting I/O for the MS of this SGSN coverage, and its status is similar to the VMSC in the GSM circuit network.SGSN provides following function:

● the route and the forwarding capability of the packet data package in this SGSN area, for all the GPRS users in this SGSN area provide service

● encrypt and authentication functions

● conversation management functional

● the mobile management function

● logical link management functions

● with the interface function of wireless RNC, HLR/HSS, MSC, SMS-GMSC, SMS-IWMSC

● ticket produces and output function, mainly collects the operating position of user to Radio Resource

In addition, when the user is in GPRS Attach (GPRS adheres to) state, stored among the SGSN among the SGSN with grouping relevant user profile and positional information.And the most of user profile among the SGSN is obtained from HLR/HSS in the routing update process.

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

Interface function with the external IP packet network, GGSN need provide MS to insert the critical point function of extenal grouped network, from the viewpoint of extranets, GGSN just looks like to be the router of all User IPs in the addressable GPRS network, need be with the external network exchanging routing information

The GPRS session management is finished MS and is set up process with the communication of extranets

Mobile subscriber's grouped data is mail to the function of correct SGSN

The generation of ticket and output function mainly embody the operating position of user to external network

The Network Element Function module of SGSN, GGSN as shown in Figure 2.

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

The WCDMA system has also defined the network architecture in single tunnel simultaneously, shown in Fig. 1 d.This framework is that with the difference of the framework of Fig. 1 a Data-carrying is directly linked to each other with GGSN by RNC, has effectively saved the processing of data message, and the function of SGSN in data forwarding and transportation level that weakened.With regard to the function that the present invention relates to,, all unaffected no matter whether based on single tunnel framework.Therefore the present invention is the improved description that example is carried out the framework aspect with Fig. 1 a framework.

Mobile communication can be supported the rich data business, as: PTP (Point To Point, point-to-point) data service, PTM-M (Point To Multipoint, point-to-multipoint) broadcast data business, PTM-G (Point To Multipoint-Group, Point To Multipoint Group Call) data service, IP-M broadcasting service.Main application can be: E-mail Email, WWW browse, WAP business, ecommerce, information inquiry, remote monitoring etc.

Portable terminal is in order to use data service, need to insert the WCDMA network, finish registration, authenticate, set up tunnel, routing update, data encapsulation, switch a series of functions such as (reorientations), relevantly with the present invention in it comprise registration, carry foundation, routing update and reorientation etc.

Wherein registering functional is included in and adheres in (attach) flow process, and this finishes user's function such as access authentication, location registers.Specifically as shown in Figure 3.

Step 301: user terminal initiates to adhere to request, carries the ability information, type of attachment of user's identify label (IMSI or P-TMSI), preceding RAI (route area id), terminal etc. in the request.

Step 302:SGSN obtains authentication vector according to identify label from HSS/HLR, finishes the authentication to the user.If terminal uses P-TMSI as identify label, there is not IMSI, then SGSN carries out authentication again behind terminal request IMSI, distributes to the new P-TMSI of this UE after the authentication.If terminal is used IMSI, then after authentication, distribute to the new P-TMSI of UE.If SGSN has had the still unspent authentication vector of this user, then do not need to obtain from HSS.Before the RAI information SGSN that can help SGSN to find UE before this to adhere to, and obtain user's relevant information, and do not need to obtain to UE from this SGSN.

Step 303:SGSN declares this UE current position information to HSS/HLR, and HSS/HLR writes down this positional information and SGSN address, and the subscription data that the user is all sends to SGSN.

Step 304:SGSN responds UE, carries P-TMSI information in the message, and attachment flow is finished.

This flow process is characterised in that user's authentication uses IMSI, and this sign is unknowable to user's business; SGSN and HSS/HLR be registered user's positional information respectively, SGSN registration route district information, HSS/HLR registration SGSN information; Adhere to finish after, SGSN preserves user's mobility management information, comprises state information, positional information, authentication vector, CAMEL-Subscription-Information or the like.This flow process and user's independent of service.

Carrying is set up correlation function and is included in the PDP activation process.Specifically as shown in Figure 4.

The PDP activation process will be set up data tunnel in the core net for the user, and distribute pdp address (being the employed IP of access service address) for the user

Step 401: terminal is sent one and is activated PDP Context request (NSAPI, TI, PDP type, pdp address, APN (access point name, Access Point Name), OoS request, PDP config option) message to SGSN.MS should use the PDP type to represent that it need use static PDP address or dynamic PDP addresses.It is that sky is asked a dynamic PDP addresses that MS should make pdp address.Terminal can use Access Point Name to select one to the reference point of a particular outer network and/or select a service.Access Point Name is to want the external packet data network that is connected to and/or a logical name of a service about the user.

Step 402: wireless side is finished relevant carrying and is set up.

Step 403:SGSN verifies the parameter information that activates in the request according to subscription data.Meet under the signatory situation in parameter, SGSN is according to the address of APN inquiry GGSN.And send to this GGSN and to create the carrying request, carry the Tunnel Identifier that SGSN distributes in the request, the tunnel that uses when this sign is used for GGSN encapsulation downlink data packet.

Step 404:GGSN stores relevant parameter, for the user distributes pdp address and Tunnel Identifier, sends to SGSN.This pdp address asks the business of types such as Internet to be used as the user, Tunnel Identifier is that SGSN has specified the tunnel that uses when sending the upstream data bag.

Step 405:SGSN responds to UE and finishes message.

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

Problem one: GGSN is constant, exists route circuitous.

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

Problem two: data service is according to IP address route, and user terminal uses dynamic IP addressing, and user's accessibility is impacted.

When terminal used dynamic address to insert, the each connection all used different IP addresses possibly.Like this this terminal is being sent in the professional time that will only limit to once connect by the IP address.And if think for a long time to be that terminal sends data service, can only use static public ip address, so dynamic IP addressing is being sought and there is defective in customer-side.

Problem three: use the IP address of static publicly-owned address, can considerable restraint be arranged to user's mobility as terminal.

Static public ip address can only be from fixing gateway striking out owing to route planning.In case move to far place, can't insert external network nearby.Inevitably cause route circuitous.

Problem four: the mobile management flow process of carrying out in order to guarantee business continuance is very complicated

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

Problem five: the multi-link use that causes a plurality of IP address needs terminal to support many IP address.

When the user needs multiple differently when professional, may use different APN, may obtain different GGSN as IAD, this moment, gateway can distribute a plurality of IP address.This needs terminal to support many IP address.

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 to adopt user identity to separate with the address.The solution of separating with the position about identify label in the prior art mainly contains two kinds, a kind of realization such as HIP technology that is based on main frame, another kind is based on the realization such as location identity separated protocol (LISP) technology of router, there are relevant multiple technologies to support again in every kind of realization, terminal use's identify label in these schemes (being expressed as AID in the literary composition) does not change in moving process, realizes the route and the forwarding of data message according to the position otherwise allocated station location marker (being expressed as RID in the literary composition) of terminal.

But, realize having the communication network of identify label and position separation architecture for how based on the WCDMA system, corresponding implementation is not all proposed.

Summary of the invention

The technical problem to be solved in the present invention provides a kind of communication network of realizing based on the WCDMA network, can realize that the identify label of based on network user terminal separates with the position.

The another technical problem that the present invention will solve provides a kind of communication network of realizing based on the WCDMA network, can support the application scenarios of portable terminal, solves the alternate route problem under this scene.

The another technical problem that the present invention will solve provides a kind of communication network of realizing based on the WCDMA network, considers the demand of compatible terminal, compatible upper-layer service in the deployment of this framework, only needs the upgrade of network side apparatus, the compatible application scenarios of not changing terminal.

In order to solve the problems of the technologies described above, the invention provides a kind of system that realizes mobile communication based on the WCDMA core net, comprise wireless access network, service GPRS node (SGSN) and critical point GPRS node (GGSN), it is characterized in that, also comprise the identity location register (ILR) that is connected with SGSN and/or GGSN, wherein:

Described GGSN is used for the session connection of maintenance terminal, be terminal distribution RID, directly or indirectly to the RID of ILR query communication opposite end, identify label of maintenance terminal and Correspondent Node (AID) and RID map information, realize the route and the forwarding of data message, and control terminal is striden the switching of GGSN;

Described SGSN or GGSN are used for registering and going to ILR the RID of registration terminal;

Described ILR is used to receive to the registration of this ILR home subscriber terminal and goes register requirement, safeguards the AID-RID map information of home subscriber terminal, and receives the query requests to terminal RID, and the RID of this terminal AID correspondence in the request is returned to query requests side.

Further, described system also can have following characteristics, and described GGSN comprises:

The station location marker distribution module is used for inserting or set up first carrying or cut process in terminal request and points to the RID of this GGSN for terminal distribution, and the AID of this RID and this terminal is sent to the mapping management module;

The mapping management module is used for the AID-RID map information and the maintenance of buffer memory terminal and Correspondent Node;

Packet forwarding module, after being used to receive the uplink data messages that comprises terminal AID and Correspondent Node AID, do not insert this GGSN as Correspondent Node, the Correspondent Node RID that will inquire from mapping management module or Correspondent Node ownership place ILR is as destination address, the RID of terminal is encapsulated in the data message as source address, through the PDN route and be forwarded to the gateway that Correspondent Node inserts, and be used for downlink data message decapsulation that PDN is sent, send to terminal after peelling off RID wherein;

The switching controls module is used for the control that terminal moves to the switching that triggers another GGSN coverage, comprises cutting out control unit, is used for control terminal and cuts out, and terminal cuts out back notice mapping management module; The incision control unit is used for the control terminal incision, notice station location marker distribution module during the terminal incision.

Further, described system also can have following characteristics, and described GGSN also comprises the processed offline module:

Described processed offline module is used for after determining to insert the terminal off-line of this GGSN, notice mapping management module; When definite Correspondent Node off-line, notice mapping management module;

Described mapping management module is known that terminal cuts out or during off-line, is deleted the AID-RID map information of this terminal, deletes the AID-RID map information that does not have the Correspondent Node of correspondence in this terminal communication opposite end with the other-end that inserts this GGSN; When knowing all terminal communications terminations of Correspondent Node off-line or Correspondent Node and this GGSN of access, the AID-RID information of deleting this Correspondent Node;

Further, described system also can have following characteristics, and described packet forwarding module comprises first retransmission unit and second retransmission unit, wherein:

First retransmission unit is used for after receiving that Correspondent Node does not insert the uplink data messages of this GGSN, peel off the GTP head, as inquire the RID of Correspondent Node in the mapping management module, the RID of this terminal and Correspondent Node is encapsulated in the data message as source, destination address respectively, sends to the PDN network; As the RID of inquiry less than Correspondent Node, from the RID of Correspondent Node ownership place ILR query communication opposite end, the AID-RID of the Correspondent Node that inquires is saved in the mapping management module;

Second retransmission unit is used for the downlink data message decapsulation to receiving, peel off RID wherein, in the encapsulation behind the GTP head, by the GGSN corresponding with Correspondent Node AID in this data message with being connected of this terminal mail to this terminal, and whether the AID-RID map information of judging Correspondent Node in this data message exist in the mapping management module, then is saved in the mapping management module as not existing.

Further, described system also can have following characteristics:

Described system also comprises packet forward function (PTF), be used for after receiving the data message that GGSN or other PTF send to, after finding corresponding RID and be encapsulated in the data message according to Correspondent Node AID in the data message, this data message is sent to the PDN network as destination address;

After described first retransmission unit was received uplink data messages, as inquire about the RID less than Correspondent Node in the mapping management module, RID was encapsulated in the data message as source address with this terminal, is forwarded to Correspondent Node ownership place PTF.

Further, described system also can have following characteristics:

After described first retransmission unit is received uplink data messages, as inquire about RID in the mapping management module less than Correspondent Node, the described data message of elder generation's buffer memory, after inquiring the RID of Correspondent Node, again the RID of this terminal and Correspondent Node is encapsulated in the data message as source, destination address, sends to the PDN network.

Further, described system also can have following characteristics:

First retransmission unit of the switching controls module among the described GGSN is during from the RID of Correspondent Node ownership place ILR query communication opposite end, utilize the chain of command interface between GGSN and the ILR, according to the RID of Correspondent Node AID to Correspondent Node ownership place ILR query communication opposite end; Perhaps

The interface that has query communication opposite end RID between described SGSN and the ILR; First retransmission unit of the switching controls module among the described GGSN is to send query requests to SGSN during from the RID of Correspondent Node ownership place ILR query communication opposite end, carries the AID of Correspondent Node, and receives the Query Result that SGSN returns; Comprise a map query module among the described SGSN, this map query module is used for after receiving query requests, utilize the interface between SGSN and the ILR, to the corresponding RID of this Correspondent Node ownership place ILR inquiry, and the AID-RID map information of the Correspondent Node that inquires returned to query requests side according to Correspondent Node AID.

Further, described system also can have following characteristics, has the interface of registering and removing registration terminal RID between described SGSN and the ILR, comprises among the described SGSN:

The Register Cancel module is used for asking this terminal attaching ground ILR this terminal RID to be registered the AID of carried terminal and RID after receiving terminal AID and being the RID of this terminal distribution; After knowing the terminal off-line, ask this terminal attaching ground ILR to remove to register the RID of this terminal;

The processed offline module is used for notice Register Cancel module when determining the terminal off-line that inserts;

It will be that the RID of terminal distribution and the AID of this terminal send to SGSN that station location marker distribution module among the described GGSN also is used for.

Further, described system also can have following characteristics, has the interface of registering and removing registration terminal RID between described GGSN and the ILR, and described GGSN also comprises the Register Cancel module, wherein:

Register Cancel module among the described GGSN is used for asking this terminal attaching ground ILR this terminal RID to be registered the AID of carried terminal and RID after receiving terminal AID and being the RID of this terminal distribution; After knowing the terminal off-line, ask this terminal attaching ground ILR to remove to register the RID of this terminal;

It will be that the RID of terminal distribution and the AID of this terminal send to the Register Cancel module that station location marker distribution module among the described GGSN also is used for;

Processed offline module among the described GGSN also is used for after determining to insert the terminal off-line of this GGSN, notice Register Cancel module.

Further, described system also can have following characteristics:

Mapping management module among the described GGSN is come the AID-RID map information of maintenance terminal and Correspondent Node based on terminal, includes the correspondence relationship information that terminal AID communicates with opposite end AID in the described map information; Perhaps

Mapping management module among the described GGSN will insert all terminals of this GGSN and the AID-RID map information of Correspondent Node is safeguarded together, not comprise the correspondence relationship information that terminal AID communicates with opposite end AID in the described map information.

Further, described system also can have following characteristics, and described GGSN also comprises the connection maintenance module, wherein:

Connection maintenance module among the described GGSN, the link information that is used to preserve terminal and Correspondent Node comprises the correspondence relationship information of terminal AID and Correspondent Node AID; At the terminal off-line or shift out or communicate by letter and stop the link information of back this terminal of deletion and Correspondent Node with Correspondent Node; After knowing the Correspondent Node off-line or stopping, delete the link information of this Correspondent Node and terminal with terminal communication;

Processed offline module among the described GGSN also is used for behind definite terminal and Correspondent Node off-line, the connection maintenance module among the notice GGSN;

The control unit that cuts out of the switching controls module among the described GGSN also is used for cutting out the connection maintenance module that GGSN is notified in the back in terminal;

After first retransmission unit of the packet forwarding module among the described GGSN and second retransmission unit also are used to receive data message, whether terminal AID has been kept at local being connected in the maintenance module with the correspondence relationship information of Correspondent Node AID in the judgment data message, as do not have, be saved in the connection maintenance module of this GGSN.

Further, described system also can have following characteristics, and described SGSN comprises:

Connect maintenance module, the link information that is used to preserve terminal and Correspondent Node comprises the correspondence relationship information of terminal AID and Correspondent Node AID; At the terminal off-line or shift out or communicate by letter and stop the link information of back this terminal of deletion and Correspondent Node with Correspondent Node.After knowing the Correspondent Node off-line or stopping, delete the link information of this Correspondent Node and terminal with terminal communication;

The processed offline module is used for the connection maintenance module of notice SGSN when determining the terminal off-line; When definite Correspondent Node off-line, the connection maintenance module of notice SGSN;

The switching controls module is used for terminal is moved to the control of the switching that another SGSN coverage triggers, and comprising: cut out control unit, be used to realize cut out control that terminal is cut out the back notice in terminal and connect maintenance module; The incision control unit is used to realize the control to the terminal incision.

Further, described system also can have following characteristics:

After first retransmission unit of the packet forwarding module among the described GGSN and second retransmission unit also are used to receive data message, whether terminal AID has been kept at local being connected in the maintenance module with the correspondence relationship information of Correspondent Node AID in the judgment data message, as do not have, send to SGSN; Perhaps

When described SGSN also comprises packet forwarding module, be used for after receiving data message, whether terminal AID and the corresponding relation of Correspondent Node AID have been kept at the maintenance module that is connected of this SGSN in the judgment data message, as preserving, are saved in the connection maintenance module of this SGSN.

Further, described system also can have following characteristics:

The processed offline module of described GGSN or SGSN also is used for sending terminal off-line notice to this terminal attaching ground ILR behind definite terminal off-line, carries this terminal AID;

Described ILR also is used for after receiving terminal off-line notice, and according to the RID of this terminal communication opposite end, the gateway that inserts to the opposite end sends terminal off-line notice, carries the AID of this terminal, or carries the AID of this terminal and Correspondent Node thereof;

The processed offline module is carried the AID of this terminal and the RID of Correspondent Node among described SGSN or the GGSN in the terminal off-line notice that sends to terminal attaching ground ILR, or carries the AID-RID map information of this terminal AID and Correspondent Node; Perhaps, SGSN or GGSN also comprise an information synchronization module, are used for the RID with the terminal communication opposite end, or the AID-RID map information is synchronized to terminal attaching ground ILR in real time or regularly;

Further, described system also can have following characteristics:

Processed offline module among the described SGSN also is used for when definite terminal off-line, to connecting the AID that finds this terminal communication opposite end in the maintenance module, the AID that finds is sent to GGSN with terminal off-line notice according to this terminal AID;

Processed offline module among the described GGSN also is used for after receiving terminal off-line notice, finds the RID of Correspondent Node in the mapping management module according to the AID of Correspondent Node, and the gateway that inserts to the opposite end sends terminal off-line notice; And after receiving the terminal off-line notice of sending the opposite end, determine this terminal off-line, and send terminal off-line notice to SGSN as Correspondent Node;

The processed offline module of described SGSN is determined this terminal off-line as Correspondent Node after receiving this processed offline notice;

Further, described system also can have following characteristics:

Processed offline module among the described GGSN also is used for when definite terminal off-line, according to the AID that finds this terminal communication opposite end in the connection maintenance module of this terminal AID in this locality or the SGSN, in local mapping management module, find the RID of this terminal communication opposite end according to finding AID again, thereby send terminal off-line notice to the gateway that the opposite end is inserted;

Processed offline module among the described GGSN is determined this terminal off-line as Correspondent Node after receiving the terminal off-line notice of sending the opposite end, and this terminal off-line notice is forwarded to the processed offline module of SGSN;

The processed offline module of described SGSN is determined this terminal off-line as Correspondent Node after receiving this processed offline notice.

Further, described system also can have following characteristics:

Processed offline module among the described SGSN also is used for when definite terminal off-line, find the AID of this terminal communication opposite end from the connection maintenance module according to the AID of this terminal, from this locality or Correspondent Node ownership place subscribed services device inquire the gateway that inserts the opposite end such as the positional information of SGSN, the gateway that inserts to the opposite end sends terminal off-line notice; And after receiving this processed offline notice, determine this terminal off-line, and send terminal off-line notice to GGSN as Correspondent Node.

Further, described system also can have following characteristics:

Also comprise the connection maintenance module among described SGSN and/or the GGSN, be used to preserve the link information with maintenance terminal and Correspondent Node, comprise the correspondence relationship information of terminal AID and Correspondent Node AID;

The control unit that cuts out of the switch control unit among the described SGSN sends to incision SGSN with the link information that cuts out terminal and Correspondent Node that connects the maintenance module preservation among this SGSN or the GGSN;

The incision control unit of the switch control unit among the described SGSN also is used for being saved in the maintenance module that is connected of this SGSN and/or GGSN with cutting out terminal that side sends and the link information of Correspondent Node.

Further, described system also can have following characteristics:

The control unit that cuts out of the switch control unit among the described GGSN sends to incision GGSN with the link information that cuts out terminal and Correspondent Node that connects the maintenance module preservation among this GGSN or the SGSN;

The incision control unit of the switch control unit among the described GGSN also is used for being saved in the maintenance module that is connected of this GGSN and/or SGSN with cutting out terminal that side sends and the link information of Correspondent Node.

Further, described system also can have following characteristics:

The control unit that cuts out of the switch control unit among the described GGSN also is used for the AID-RID map information that cuts out the terminal communication opposite end that the mapping management module is preserved is sent to incision GGSN.

Further, described system also can have following characteristics:

The control unit that cuts out of the switch control unit among the GGSN also is used for the AID-RID map information that cuts out the terminal communication opposite end that the mapping management module is preserved is sent to SGSN;

The control unit that cuts out of the switch control unit among the SGSN also is used for behind the AID-RID map information of receiving the terminal communication opposite end that GGSN sends, sends to incision SGSN;

The incision control unit of the switch control unit among the SGSN also is used to receive the AID-RID map information that cuts out the terminal communication opposite end that SGSN sends, and sends to GGSN.

Further, described system also can have following characteristics:

Described SGSN or GGSN also comprise the information synchronization module, are used for the RID of Correspondent Node of incision terminal or AID-RID map information in real time or regularly or be synchronized to ILR when switching;

Described ILR also is used to safeguard the RID or the AID-RID map information of the Correspondent Node of each home subscriber terminal, after in handoff procedure, receiving the register requirement of carrying the current AID-RID map information of incision terminal of SGSN or GGSN Register Cancel module transmission, according to the RID of this terminal communication opposite end of safeguarding, the gateway that inserts to the opposite end sends terminal RID update notification.

Further, described system also can have following characteristics:

Station location marker distribution module among the described GGSN also is used for also this RID being returned the incision control unit of the switching controls module among this GGSN for terminal distribution RID after receiving terminal incision notice;

The incision control unit of the switching controls module among the GGSN also is used at the RID that receives to the incision terminal distribution, and after receiving the AID-RID map information of the link information that cuts out this terminal that side transmits and Correspondent Node and this terminal communication opposite end, find the AID of Correspondent Node from the connection maintenance module of this GGSN or SGSN according to the AID of this terminal, find the RID of Correspondent Node again from the AID-RID map information of this terminal communication opposite end, the gateway that inserts to the opposite end sends terminal RID update notification then.

Further, described system also can have following characteristics:

Station location marker distribution module among the GGSN also is used for after receiving terminal incision notice, sends to for this terminal distribution RID and with this RID and cuts out GGSN;

The control unit that cuts out of the switching controls module among the GGSN is received to behind the RID that cuts out terminal distribution, find this terminal communication opposite end AID according to this terminal that connects the maintenance module preservation among this GGSN or the SGSN and the link information of Correspondent Node, the AID-RID map information of this terminal communication opposite end that the mapping management module is preserved in this GGSN finds the RID of this terminal communication opposite end again, and the gateway that inserts to the opposite end sends terminal RID update notification.

Further, described system also can have following characteristics:

After station location marker distribution module among the described GGSN also is used to receive terminal incision notice, also this RID is sent to the incision control unit of the switching controls module among the SGSN for this terminal distribution RID;

The incision control unit of the switching controls module among the described SGSN also is used for after receiving that RID and having preserved for the incision terminal distribution cuts out the link information of terminal that a side transmits and Correspondent Node, find the AID of this terminal communication opposite end from the connection maintenance module according to the AID of this terminal, from this locality or the signatory register of Correspondent Node ownership place inquire the gateway that the opposite end is inserted, the gateway that inserts to the opposite end sends terminal RID update notification then;

Switching controls module among the described SGSN also is used for being forwarded to GGSN after receiving the terminal RID update notification that send the opposite end.

Further, described system also can have following characteristics:

Station location marker distribution module among the described GGSN also is used for after receiving terminal incision notice, sends to for this terminal distribution RID and with this RID and cuts out GGSN;

The control unit that cuts out of the switching controls module among the described GGSN also is used for after receiving to the RID that cuts out terminal distribution, send terminal RID update notification to SGSN, as SGSN the connection maintenance module is not set, in this terminal RID update notification, also will carries the AID of this terminal communication opposite end that connects the maintenance module preservation among the GGSN;

Cutting out after control unit receives terminal RID update notification of switching controls module among the described SGSN, according to the AID of this terminal from the AID of this terminal communication opposite end of connecting maintenance module and finding or from this notice the direct AID of this terminal communication opposite end of extraction, from this locality or Correspondent Node ownership place HLR/HSS inquire the gateway that inserts the opposite end such as the positional information of SGSN, the gateway that inserts to the opposite end sends terminal RID update notification then;

Further, described system also can have following characteristics:

Described ILR preserves or upgrades the AID-RID map information of this terminal after receiving the register requirement of home subscriber terminal, it is invalid to receive after the de-registration request of home subscriber terminal the AID-RID map information of this terminal being deleted or is changed to; If receive registration, de-registration request, then be transmitted to this terminal attaching ground ILR and handle the non-attribution user terminal.

The present invention also provides a kind of terminal to insert the method for said system, comprising:

Insert in the process of described communication network in terminal, service GPRS node (SGSN) obtains the identify label (AID) of terminal and sends to critical point GPRS node (GGSN);

When described GGSN does not preserve the identify label of this terminal and station location marker (AID-RID) map information in this locality, be terminal distribution station location marker (RID), preserve the map information of this terminal AID and this RID, and this RID is sent to described SGSN;

Described SGSN sends register requirement to this terminal attaching ground ILR, carries the AID and the RID of this terminal; After this ILR receives this register requirement, preserve the current AID-RID map information of this terminal.

Further, described method also can have following characteristics:

Described SGSN is after receiving packet data protocol (PDP) the activation request that terminal sends, and obtains the AID of terminal, by the establishment PDP Context request that sends to GGSN this AID is sent to described GGSN; Described GGSN sends to described SGSN by the PDP Context described RID that will distribute of receiveing the response.

Further, described method also can have following characteristics, and described SGSN obtains the AID of terminal in the following manner:

Described SGSN inserts in the authentication and identifying procedure carry out in terminal, obtain the AID of this terminal from this terminal attaching ground subscribed services device, and described SGSN is accepting in the message this AID to be sent to terminal in the PDP activation of responding to terminal; Perhaps

The signaling that has disposed the AID of this terminal in the described terminal and sent when inserting is taken SGSN to.

Further, described method also can have following characteristics, the IP address allocated when AID of described terminal contracts for the terminal use.

Further, described method also can have following characteristics, and described GGSN if the current AID-RID map information of this terminal is not also preserved in this locality, then writes down the map information of this terminal AID and RID after being terminal distribution RID,

The present invention also provides another kind of terminal to insert the method for said system, comprising:

When described GGSN does not preserve the identify label of this terminal and station location marker (AID-RID) map information in this locality, be terminal distribution station location marker (RID), preserve the map information of this terminal AID and this RID, and send register requirement, carry the AID and the RID of this terminal to this terminal attaching ground ILR; After this ILR receives this register requirement, preserve the current AID-RID map information of this terminal.

Further, described method also can have following characteristics:

Described SGSN is after receiving packet data protocol (PDP) the activation request that terminal sends, and obtains the AID of terminal, by the establishment PDP Context request that sends to GGSN this AID is sent to described GGSN's.

Such scheme can reach following technique effect at least:

1, user terminal can change core net service access gateway (GGSN), has effectively avoided route circuitous, is better than technology such as using mobile IP.

Keep business continuance when 2, mobile, kept mobile network's characteristic.

3, user's identity is fixed (being that AID is constant), efficiently solves user's accessibility problem.

4, do not influence existing elements structure and basic flow process mechanism, change less.

5, terminal and wireless nothing are changed, further reduced the cost of change network.

6, mobile management flow process is simple, only is the maintenance to the mapping relation table.

Description of drawings

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

Fig. 1 a is the Organization Chart of existing WCDMA system packet domain;

Fig. 1 b is a kind of new identify label separates (SILSN) framework with the position a network topology schematic diagram;

Fig. 1 c is the schematic diagram of the topological relation of SILSN network and traditional IP among Fig. 2.

Fig. 1 d is for having the Organization Chart based on the WCDMA system packet domain in single tunnel now;

Fig. 2 is the schematic diagram of the existing capability module of the SGSN of WCDMA system, GGSN;

Fig. 3 is the existing attachment flow figure of WCDMA system;

Fig. 4 is the form schematic diagram of the data message transmitted between the ASN in the SILSN network of Fig. 1 b;

Fig. 5 is the schematic diagram of the embodiment of the invention one network architecture;

Fig. 6 is the functional mode figure of SGSN, GGSN in the network architecture of Fig. 5;

Fig. 7 is the schematic diagram of the embodiment of the invention one data message form;

Fig. 8 is the flow chart based on the registration of the embodiment of the invention one framework and data granting;

Fig. 9 is the schematic diagram of the embodiment of the invention two network architectures;

Figure 10 is the functional mode figure of SGSN, GGSN in the network architecture of Fig. 9;

Figure 11 is the flow chart based on the registration of the embodiment of the invention two frameworks and data granting;

Figure 12 is the schematic diagram of the embodiment of the invention three network architectures;

Figure 13 is the functional mode figure of SGSN, GGSN in the network architecture of Figure 12;

Figure 14 is based on the registration of the embodiment of the invention three network architectures and the flow chart of inquiry.

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.

Be that a kind of novel identify label separates (SILSN:Subscriber Identifier﹠amp with the position shown in Fig. 1 b; Locator Separation Network) framework, the network topology of this SILSN framework is divided into does not have overlapping Access Network and backbone network on the topological relation, Access Network is positioned at the edge of backbone network, be responsible for the access of all terminals, the route and the forwarding of the inter-terminal data message that backbone network is responsible for inserting.

Two kinds of sign types are arranged: insert sign (AID:Access Identifier) and Route Distinguisher (RID:Routing Identifier) in the network of SILSN framework.Wherein, AID is the User Identity of terminal, and network remains constant in the terminal moving process for each terminal use distributes an AID; RID is that network is the station location marker of terminal distribution, uses at backbone network.It should be noted that identify label can have different titles with station location marker at different SILSN frameworks, but essence is the same.After the user contracts and becomes this architecture network user, the operation of distributing telephone numbers of can in this user attaching authentication center and ownership ILR, opening an account, authentication center and ILR write down this attribute of user data, are included as the AID that this user distributes.After the processing that finishing opens an account distributes telephone numbers, AID is given this user by static allocation, and in effective legal duration of this user, this user's AID is constant.

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

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

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

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

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

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

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

Alternatively, backbone network can also comprise:

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

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

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

The SILSN framework initial stage can traditional IP one or more isolated island forms exist and development, or as the expansion of traditional IP.The topological relation of SILSN framework and traditional IP is shown in Fig. 1 c, and the backbone network of SILSN framework part is in same plane with Traditional IP, by ISN and traditional IP intercommunication.The SILSN framework possesses the ability of independent networking, can form to break away from the network that traditional IP develops alone, and in this stage, functional entity ISN will no longer exist.

In the SILSN framework, the form of the data message of transmitting between ASN is shown in Figure 5.Wherein source AID and purpose AID are respectively the User Identity of terminal and Correspondent Node thereof, source RID and purpose RID are respectively the station location marker (RID) of terminal and Correspondent Node thereof, the RID of terminal should point to the ASN that this terminal inserts, the RID of Correspondent Node should point to the ASN that Correspondent Node inserts, and so-called certain network element that points to is that the data message of destination address will and be forwarded to this network element by broad sense Forwarding plane route with this RID promptly.Two layers of header are the encapsulation of carrying out when between two ASN the tunnel being arranged.

Aspects such as the advantage of this SILSN framework is that management is simple, supports mobility and business continuance, and user ID is permanent.The framework of it and existing WCDMA has a lot of similarities on using, such as being connected with traditional IP, borde gateway is to the processing of data message forwarding, data message form, the inquiry of signaling and authentication process, processing of mobile management or the like aspect.Therefore novel mobile management framework applications mobile management and service access can be realized in existing WCDMA core net, the problems referred to above that WCDMA exists can be solved effectively.Also to consider during application how to use and be only effectively and low cost (change to existing network is as far as possible little).

To realize in the WCDMA system that terminal identity sign separates with the position, at least comprised an identity data storage network element (the following identity location register (ILR) that all is called) in the system, come the AID and the RID of storage terminal, wherein RID is variable, and AID is constant.Terminal can be with the IP address that is assigned to or the be signed in to AID as oneself, and the source address that sends as data with AID, is that destination address sends datagram with the AID such as the IP address of Correspondent Node.Data message is at core gateway GGSN, the RID of terminal in the encapsulation (points to the GGSN that terminal inserts, or perhaps the address of this GGSN) as new source address, the RID of Correspondent Node (pointing to the GGSN that Correspondent Node inserts) is as new destination address encapsulation, and keep the AID of original terminal and Correspondent Node, packaged IP message transmits in supporting press the external network (corresponding to above-mentioned broad sense Forwarding plane) of RID route and forwarding, to the gateway GGSN of opposite end, after opposite end gateway GGSN unpacks, peel off the wherein RID of terminal and Correspondent Node, the internal layer message is continued transmission.

The borde gateway GGSN of WCDMA core net need write down the AID of home subscriber terminal and distribute to the corresponding relation of the station location marker of this terminal, it is the AID-RID map information, and can be according to the AID of Correspondent Node AID, to realize the encapsulation of outer address layer from Correspondent Node ownership place ILR obtaining communication opposite end.

In order to realize writing function, the borde gateway GGSN of WCDMA core net need store network element with identity data and have an interface.

In order to realize writing function, the borde gateway GGSN of WCDMA core net can know the identify label and the station location marker of this user terminal.

In order to realize above-mentioned functions, ILR need be the network element of a global scope, perhaps the network element that can be inquired about in global scope.

(W-NodeB, TD-NodeB RNC) do not have any influence, can transmit for user's external IP address as User Identity the WCDMA system assignment to having terminal equipment and wireless device now in order to realize above-mentioned functions.For guaranteeing the uniqueness of user identity, this address can be the public ip address of static signing, comprises IPV4/V6 address etc.

In the literary composition, the network element that the Correspondent Node of terminal is inserted abbreviates the opposite end network element as; When terminal was switched, the network element that terminal is cut out abbreviated as and cuts out network element, and the network element that terminal is cut into is called the incision network element; Describing when transmitting information between two network elements, be the opposite end network element as not particularly pointing out certain network element, the information that is interpreted as between the network element of the same side that terminal inserts transmits; In order to express easily, when the function of certain network element of statement, the user terminal that is linked into this network element is called terminal, with the Correspondent Node that is called of the user terminal communication that inserts this network element.

In addition, when a network element is received the information of another network element transmission, can be with this distribution of information to the module of preserving or handle this information, this function is explanation no longer separately hereinafter.

Embodiment one:

Fig. 5 is the schematic diagram of the present embodiment network architecture, in the present embodiment, newly-increased network element ILR, be used to store present networks user terminal AID-RID map information (being AID and RID corresponding informance) and safeguard, can also increase network element PTF newly, be used to GGSN to transmit ephemeral data.Compare with the SILSN framework of Fig. 1 b, GGSN among Fig. 5 and SGSN need carry out function expansion, strengthen as the what's new module or to former module function, and finishing the function of ASN jointly, Fig. 6 is the functional schematic of GGSN and SGSN in this framework.Hereinafter being primarily aimed at functional module relevant with the function expansion among GGSN and the SGSN describes.GGSN is connected to the PDN network of outside outside, and this PDN network should be supported by RID route and forwarding, the broad sense Forwarding plane among the pie graph 1b.

In the communication network of present embodiment:

SGSN is used to terminal that access service and control are provided, and the RID of terminal is registered and go registration to terminal attaching ground ILR, the link information of maintenance terminal and Correspondent Node, and the switching that cooperates realization terminal SGSN-spanning with other SGSN.

Comprise the relevant module of following and function expansion among the SGSN:

The Register Cancel module is used for asking this terminal attaching ground ILR this terminal RID to be registered the AID of carried terminal and RID after receiving terminal AID and being the RID of this terminal distribution; After knowing the terminal off-line, ask this terminal attaching ground ILR to remove the RID of this terminal of registration (promptly nullifying).

The processed offline module is used for notifying the Register Cancel module when (promptly referring to the terminal attachment removal) at the terminal off-line of determining access.The processed offline module can flow real-time testing mechanism or the like mode and determine the terminal off-line according to the relevant signaling in the terminal off-line procedure, and other embodiment are similar.

The switching controls module is used for terminal is moved to the control of the switching that another SGSN coverage triggers, and comprising: cut out control unit, be used to realize the control that terminal is cut out; And the incision control unit, be used to realize control to the terminal incision.

GGSN is used for the session connection of maintenance terminal, for terminal distribution is pointed to the RID of this GGSN, to the RID of ILR query communication opposite end, the AID-RID map information of maintenance terminal and Correspondent Node, realize the route and the forwarding of data message, and the realization terminal is striden the switching controls of GGSN.

Comprise the relevant module of following and function expansion among the GGSN:

The station location marker distribution module is used for inserting or set up first carrying or terminal cut process in terminal request and points to the RID of this GGSN for terminal distribution, and this RID that distributes and the AID of this terminal are sent to SGSN, the mapping management module of this GGSN.

The mapping management module is used for the AID-RID map information and the maintenance of buffer memory terminal and Correspondent Node; Know that terminal cuts out or during off-line, delete the AID-RID map information of this terminal, delete the AID-RID map information that does not have the Correspondent Node of correspondence in this terminal communication opposite end (Correspondent Node that refers to this terminal is abbreviated as this terminal communication opposite end) with the other-end that inserts this GGSN; When knowing all terminal communications terminations of Correspondent Node off-line or Correspondent Node and this GGSN of access, the AID-RID information of deleting this Correspondent Node; After receiving the terminal RID update notification of sending the opposite end, upgrade the AID-RID map information of local this terminal of preserving.The mapping management module can be safeguarded together to the Correspondent Node of all terminals of inserting this GGSN, does not comprise the correspondence relationship information that terminal AID communicates with opposite end AID, can not repeat to preserve map information like this.But also can come the AID-RID map information of maintenance terminal and Correspondent Node based on terminal, just include correspondence relationship information that terminal AID communicate with opposite end AID in the map information this moment.

The processed offline module is used for after determining to insert the terminal off-line of this GGSN, notice mapping management module; When definite Correspondent Node off-line, notice mapping management module.

Packet forwarding module, be used for after receiving that Correspondent Node does not insert the uplink data messages of this GGSN, the RID of the Correspondent Node that will inquire from mapping management module or Correspondent Node ownership place ILR is as destination address, with terminal RID is that source address is encapsulated in the data message that comprises terminal AID and Correspondent Node AID, through the PDN route and be forwarded to the gateway that Correspondent Node inserts, and, send to terminal after peelling off RID wherein with the downlink data message decapsulation that PDN sends.

Packet forwarding module comprises first retransmission unit and second retransmission unit, wherein:

First retransmission unit be used for receive that SGSN sends comprise terminal AID and Correspondent Node AID and Correspondent Node and do not insert the uplink data messages of this GGSN after, peel off the GTP head, as inquire the RID of Correspondent Node in the mapping management module, the RID of this terminal and Correspondent Node is encapsulated in the data message as source, destination address respectively, through outside PDN network route and be forwarded to gateway such as the GGSN that the opposite end is inserted, also can be the borde gateway etc. of legacy network and this architecture network;

As the RID of inquiry less than Correspondent Node, to the RID of Correspondent Node ownership place ILR query communication opposite end, the AID-RID of the Correspondent Node that inquires is saved in the mapping management module.Can as source address be encapsulated in this terminal RID in data message the data message this moment, sends to Correspondent Node ownership place PTF earlier, is forwarded to the gateway that the opposite end is inserted by this PTF through PDN; Also can first buffer memory, after inquiring the RID of Correspondent Node, again the RID of this terminal and Correspondent Node is encapsulated in the data message as source, destination address respectively, through the PDN route and be forwarded to the gateway that the opposite end is inserted.

First retransmission unit can be determined Correspondent Node ownership place ILR/PTF by inquiring about local AID that disposes and the corresponding relation of PTF.When in addition data message being sent to Correspondent Node ownership place PTF, first retransmission unit can be with the RID of Correspondent Node ownership place PTF as destination address, also can be with the RID of the visit that connected ground PTF as destination address, PTF is routed to Correspondent Node ownership place PTF by visit ground.

Second retransmission unit is used for downlink data message decapsulation that the PDN that receives is sent, peels off RID wherein, in the encapsulation behind the GTP head, by the GGSN corresponding with Correspondent Node AID in the data message with being connected of this terminal mail to this terminal; Alternatively, whether the AID-RID map information of Correspondent Node exists in the mapping management module in the judgment data message, then is saved in the mapping management module as not existing.

When the terminal in the uplink data messages and Correspondent Node inserted this GGSN, first retransmission unit can not inquired about RID, does not carry out the encapsulation of RID, directly issued this GGSN second retransmission unit and handled.Mode when can certainly not insert this GGSN by above-mentioned Correspondent Node encapsulates and route.

First retransmission unit can directly send query requests to Correspondent Node ownership place ILR according to the AID section of configuration and the corresponding relation between ILR during to the RID of Correspondent Node ownership place ILR query communication opposite end; Also can send to visit ground ILR earlier, according to the AID section of configuration and the corresponding relation between ILR, send query requests to Correspondent Node ownership place ILR by this visit ground ILR.

Form before and after the data message forwarding as shown in Figure 7.Comprise GTP head, source AID, purpose AID and data message payload between terminal and the GGSN in the data message; Wherein source AID is the AID of the terminal that sends datagram, and purpose AID is that the terminal that data message sends to is the AID of Correspondent Node, and the AID of terminal is the static ip address of its distribution in the time of can adopting this terminal use signatory.Peelled off the GTP head in the data message after the GGSN encapsulation, increased as the terminal of source address RID (being expressed as source RID among the figure) and as the RID (being expressed as purpose RID among the figure) of the Correspondent Node of destination address.Data message in the PDN network delivery has also added two layers of header on the data message of GGSN encapsulation, GGSN re-sends to the PDN network after also can encapsulating two layers of header.

The switching controls module is used for the control that terminal moves to the switching that triggers another GGSN coverage, AID mainly is described, the relevant treatment of RID here.This switching controls module comprises:

Cutting out control unit is used to realize control that terminal is cut out cut out back notice mapping management module in this terminal;

The incision control unit is used to realize the control to the terminal incision, this terminal incision of notice station location marker distribution module.

Identity location register (ILR) can close with home subscriber server HLR/HSS and establish, be used to receive to the registration of home subscriber terminal and go register requirement, safeguard the AID-RID map information of this terminal, and after the query requests of receiving terminal, the pairing RID of this terminal AID that comprises in the request is returned to query requests side.ILR can preserve or upgrade the AID-RID map information of this terminal after receiving the register requirement of home subscriber terminal, receive to the home subscriber terminal go after the register requirement with the AID-RID map information deletion of this terminal or be changed to invalid.If receive registration, go register requirement, then be transmitted to this terminal attaching ground ILR and handle the non-attribution user terminal.

Data forwarding functional module (PTF) is used for after receiving the data message that GGSN or other PTF send to, after finding corresponding RID and be encapsulated in the data message head according to Correspondent Node AID, this data message is sent to the gateway that the opposite end is inserted through PDN as destination address.

PTF is responsible for GGSN and transmits ephemeral data, this part ephemeral data is when temporarily not having opposite end RID information on the GGSN, temporarily change PTF over to,, after PTF obtains RID information, transmit (purpose of this way is that GGSN does not need to increase the support caching function) by the PTF buffer memory.When treating that GGSN gets access to RID information, data will no longer be forwarded to PTF, and directly be encapsulated and sent by GGSN.PTF can close with ILR and establish, and to obtain RID information faster, promptly PTF will not need cache mapping information; PTF also can close with GGSN and establish, as the cache module of GGSN.When PTF did not exist, GGSN need increase caching function.Packet forward function (PTF) is optional.

For sake of clarity, this concentrated being described that be embodied in regard to other several functions, relate to the maintenance of terminal AID and Correspondent Node AID corresponding relation, terminal off-line notice is to the transmission of opposite end, terminal RID update notification cuts out the processing such as AID-RID map information, terminal AID and Correspondent Node AID corresponding relation that side direction incision side is transmitted the terminal communication opposite end to the transmission of opposite end during switching.

● about the maintenance of terminal AID and Correspondent Node AID corresponding relation, be divided into following several mode by the difference that connects the maintenance module setting:

The mode that present embodiment adopts is designated as mode A1

Be provided with one respectively at SGSN and GGSN and be connected maintenance module, be used to preserve the link information of terminal and Correspondent Node, comprise the correspondence relationship information of terminal AID and Correspondent Node AID, can also preserve the AID-RID map information of terminal; At the terminal off-line or shift out or communicate by letter and stop the link information of back this terminal of deletion and Correspondent Node with Correspondent Node.After knowing the Correspondent Node off-line or stopping, delete the link information of this Correspondent Node and terminal with terminal communication.

Correspondingly:

Processed offline module among the SGSN also is used for the connection maintenance module of notice SGSN when determining the terminal off-line; When definite Correspondent Node off-line, the connection maintenance module of notice SGSN.

The control unit that cuts out of the switching controls module among the SGSN also is used for cutting out the connection maintenance module that SGSN is notified in the back in terminal.

Processed offline module among the GGSN also is used for behind definite terminal off-line notice and connects maintenance module, and when definite Correspondent Node off-line, notifies the connection maintenance module among the GGSN.

The control unit that cuts out of the switching controls module among the GGSN also is used for cutting out the connection maintenance module that GGSN is notified in the back in terminal.

Above-mentioned SGSN can or flow modes such as real-time testing mechanism and determine the terminal off-line with processed offline module among the GGSN according to the relevant signaling in the terminal off-line procedure, the terminal off-line notice that can send according to the opposite end or flow real-time testing mechanism and wait to determine the Correspondent Node off-line, but be not limited to this.Other situations that shift out as for terminal, and the terminal termination of communicating by letter with Correspondent Node, connecting maintenance module can know from the module that realizes these functions, no longer describes in detail here.

The mode that connection maintenance module among the GGSN obtains the correspondence relationship information of terminal AID and Correspondent Node AID can be: after first retransmission unit of the packet forwarding module among the GGSN and second retransmission unit also are used to receive data message, whether terminal AID has been kept at local being connected in the maintenance module with the correspondence relationship information of Correspondent Node AID in the judgment data message, as do not have, be saved in the connection maintenance module of this GGSN.

Connection maintenance module among the SGSN obtains terminal AID: first retransmission unit of the packet forwarding module among the GGSN and second retransmission unit terminal AID and the correspondence relationship information of Correspondent Node AID are saved in this GGSN be connected maintenance module in, also send to SGSN, preserve by the connection maintenance module among the SGSN; When having packet forwarding module among the SGSN, also can be after receiving data message by this module, whether terminal AID and the corresponding relation of Correspondent Node AID have been kept at the maintenance module that is connected of this SGSN in the judgment data message, as preserving, are saved in the connection maintenance module.

Another kind of variation pattern is designated as mode A2

The manner only is provided with the connection maintenance module at SGSN, and function is identical with mode A1.

Correspondingly,

Processed offline module among the SGSN also is used for when definite terminal off-line and when determining the Correspondent Node off-line, notifies the connection maintenance module of SGSN.

Data forwarding module among the SGSN is used for after receiving data message, judges that whether wherein terminal AID and the corresponding relation of Correspondent Node AID has been kept at the maintenance module that is connected of this SGSN, as preservation, is saved in the connection maintenance module.

Another variation pattern is designated as mode A3

The manner only is provided with the connection maintenance module at GGSN, and function is identical with mode A1.

Correspondingly,

After first retransmission unit of the packet forwarding module among the GGSN and second retransmission unit also are used to receive data message, whether terminal AID has been kept at local being connected in the maintenance module with the correspondence relationship information of Correspondent Node AID in the judgment data message, as do not have, be saved in the connection maintenance module of this GGSN.

The setting of above-mentioned connection maintenance module is alternatively, if preserve the AID-RID map information of each terminal communication opposite end respectively in the mapping management module, this moment, the correspondence relationship information of terminal AID and Correspondent Node AID was safeguarded in the mapping management module.

● send terminal off-line notice to Correspondent Node during about the terminal off-line

This terminal off-line notice is alternatively, and Correspondent Node can detect definite this terminal off-line as Correspondent Node by real-time stream.Terminal off-line notice in a separate paper is not restricted to the message that special notification terminal off-line is sent, and the message that the opposite end can define the terminal off-line according to this promptly belongs to terminal off-line notice.

The processed offline module of GGSN or SGSN is when determining the terminal off-line that inserts, and the gateway that inserts to all opposite ends transmits terminal off-line notice, need carry the AID of this terminal in the terminal off-line notice.Specifically can realize in the following ways, but be not limited to this:

The mode that present embodiment adopts is designated as mode B1

Under this mode, the gateway that is inserted to the opposite end by ILR sends terminal off-line notice, correspondingly:

The processed offline module of GGSN or SGSN also is used for sending terminal off-line notice to this terminal attaching ground ILR behind definite terminal off-line, carries this terminal AID; Certain network element that sends this notice must have the chain of command interface with ILR.

Described ILR also is used for after receiving terminal off-line notice, and according to the RID of this terminal communication opposite end, the gateway that inserts to the opposite end sends terminal off-line notice, carries the AID of this terminal, or carries the AID of this terminal and Correspondent Node thereof.

Under this mode, can in the terminal off-line notice that sends to terminal attaching ground ILR, carry the AID of this terminal and the RID of Correspondent Node by processed offline module among SGSN or the GGSN, or carry the AID-RID map information of this terminal AID and Correspondent Node; Perhaps

In ILR, safeguard the RID of the Correspondent Node of each home subscriber terminal, or the AID-RID map information.At this moment, SGSN or GGSN need increase an information synchronization module newly, are used for the RID with the terminal communication opposite end, or the AID-RID map information is synchronized to terminal attaching ground ILR in real time or regularly.

Another kind of mode is designated as B2

There is the chain of command interface under the manner between the GGSN, sends the off-line notice by this interface

Processed offline module among the SGSN also is used for when definite terminal off-line, to connecting the AID that finds this terminal communication opposite end in the maintenance module, the AID that finds is sent to GGSN with terminal off-line notice according to this terminal AID;

Processed offline module among the GGSN also is used for after receiving terminal off-line notice, finds the RID of Correspondent Node in the mapping management module according to the AID of Correspondent Node, and the gateway that inserts to the opposite end sends terminal off-line notice; And after receiving the terminal off-line notice of sending the opposite end, determine this terminal off-line, and send terminal off-line notice to SGSN as Correspondent Node.

The processed offline module of SGSN is determined this terminal off-line as Correspondent Node after receiving this processed offline notice.

Another kind of mode is designated as B3

Increase the chain of command interface under the manner between the GGSN, send the off-line notice by this interface

Processed offline module among the GGSN also is used for when definite terminal off-line, according to the AID that finds this terminal communication opposite end in the connection maintenance module of this terminal AID in this locality or the SGSN, in local mapping management module, find the RID of this terminal communication opposite end according to finding AID again, thereby send terminal off-line notice to the gateway that the opposite end is inserted;

Processed offline module among the GGSN is determined this terminal off-line as Correspondent Node after receiving the terminal off-line notice of sending the opposite end, and this terminal off-line notice is forwarded to the processed offline module of SGSN.

Another mode is designated as B4

The interface that the manner sends a notice between the SGSN sends terminal off-line notice, correspondingly:

Processed offline module among the SGSN also is used for when definite terminal off-line, find the AID of this terminal communication opposite end from the connection maintenance module according to the AID of this terminal, from this locality or Correspondent Node ownership place HLR/HSS inquire the gateway that inserts the opposite end such as the positional information of SGSN, thereby send terminal off-line notice to the gateway that the opposite end is inserted; And after receiving this processed offline notice, determine this terminal off-line, and send terminal off-line notice to GGSN as Correspondent Node.The correspondence relationship information of last configurable AID of SGSN and ownership place HLR/HSS.

● about redistribute RID for terminal after, send terminal RID update notification to Correspondent Node

Terminal RID update notification in the literary composition is not restricted to special notification terminal RID and upgrades the message that is sent, and the message that the opposite end can define terminal RID renewal according to this promptly belongs to terminal RID update notification.

Switching controls module among GGSN or the SGSN also is used for after the station location marker distribution module is the new RID of terminal distribution, the gateway that inserts to the opposite end sends terminal RID update notification, need carry the AID and the newly assigned RID (being the current AID-RID of terminal) of this terminal in the terminal RID update notification.Specifically can realize in the following ways, but be not limited to this:

The mode that present embodiment adopts, mode C1

Under this mode, the gateway that is inserted to the opposite end by ILR sends terminal RID update notification, correspondingly:

SGSN or GGSN need increase an information synchronization module newly, are used for the RID (or AID-RID map information) of the Correspondent Node of incision terminal in real time or regularly or be synchronized to ILR when switching.

ILR also is used to safeguard the RID of the Correspondent Node of each home subscriber terminal, or AID-RID map information, after in handoff procedure, receiving the register requirement of carrying the current AID-RID map information of incision terminal of SGSN or GGSN Register Cancel module transmission, according to the RID of this terminal communication opposite end of safeguarding, the gateway that inserts to the opposite end sends terminal RID update notification.

Another kind of mode, mode C2

There is the chain of command interface under the manner between the GGSN, sends terminal RID update notification by this interface by incision GGSN.Correspondingly,

Station location marker distribution module among the GGSN also is used for also this RID being returned the incision control unit of the switching controls module among this GGSN for this terminal distribution RID after receiving terminal incision notice.

The incision control unit of the switching controls module among the GGSN also is used at the RID that receives to the incision terminal distribution, and after receiving the AID-RID map information of the link information that cuts out this terminal that side transmits and Correspondent Node and this terminal communication opposite end, from described link information, find the AID of Correspondent Node according to the AID of this terminal, and then finding the RID of Correspondent Node from the AID-RID map information of this terminal communication opposite end, gateway such as the GGSN that inserts to the opposite end sends terminal RID update notification then.

Another kind of mode, mode C3

There is the chain of command interface under the manner between the GGSN, in handoff procedure, sends terminal RID update notification by this interface by cutting out GGSN.Correspondingly,

Station location marker distribution module among the GGSN also is used for after receiving terminal incision notice, sends to for this terminal distribution RID and with this RID and cuts out GGSN.

The control unit that cuts out of the switching controls module among the GGSN is received to behind the RID that cuts out terminal distribution, according to this terminal that connects the maintenance module preservation among this GGSN or the SGSN and the link information of Correspondent Node, and the AID-RID map information of this terminal communication opposite end that the mapping management module is preserved among this GGSN, find the RID of this terminal communication opposite end, the gateway that inserts to the opposite end sends terminal RID update notification.

Another kind of mode, mode C4

Under the manner, send terminal RID update notification by gateway such as the SGSN that the interface between the SGSN inserts to the opposite end by incision one side.Correspondingly

Station location marker distribution module among the GGSN also is used for also this RID being sent to the incision control unit of the switching controls module among the SGSN for this terminal distribution RID after receiving terminal incision notice.

The incision control unit of the switching controls module among the SGSN also is used for after receiving that RID and having preserved for the incision terminal distribution cuts out the link information of terminal that a side transmits and Correspondent Node, find the AID of this terminal communication opposite end from the connection maintenance module according to the AID of this terminal, from this locality or Correspondent Node ownership place HLR/HSS inquire the gateway that inserts the opposite end such as the positional information of SGSN, the gateway that inserts to the opposite end sends terminal RID update notification then.

Switching controls module among the SGSN also is used for being forwarded to GGSN after receiving the terminal RID update notification that send the opposite end.

Another kind of mode, mode C5

The control unit that cuts out of the switching controls module among the GGSN also is used for after receiving to the RID that cuts out terminal distribution, send terminal RID update notification to SGSN, as SGSN the connection maintenance module is not set, in this terminal RID update notification, also will carries the AID of this terminal communication opposite end that connects the maintenance module preservation among the GGSN;

Cutting out after control unit receives terminal RID update notification of switching controls module among the SGSN, according to the AID of this terminal from the AID of this terminal communication opposite end of connecting maintenance module and finding or from this notice the direct AID of this terminal communication opposite end of extraction, from this locality or Correspondent Node ownership place HLR/HSS inquire the gateway that inserts the opposite end such as the positional information of SGSN, the gateway that inserts to the opposite end sends terminal RID update notification then.

● cut out the link information that side direction incision side is transmitted terminal and Correspondent Node

This function is alternatively, can be in the following ways during use, but be not limited to this:

The mode that present embodiment adopts is designated as mode D1

The control unit that cuts out of the switch control unit among the SGSN sends to incision SGSN with the link information that cuts out terminal and Correspondent Node that connects the maintenance module preservation among this SGSN or the GGSN.

The incision control unit of the switch control unit among the SGSN also is used for being saved in the maintenance module that is connected of this SGSN and/or GGSN with cutting out terminal that side sends and the link information of Correspondent Node.

Another kind of mode is designated as mode D2

When having the chain of command interface between the GGSN, the control unit that cuts out of the switch control unit among the GGSN sends to incision GGSN with the link information that cuts out terminal and Correspondent Node that connects the maintenance module preservation among this GGSN or the SGSN.

The incision control unit of the switch control unit among the GGSN also is used for being saved in the maintenance module that is connected of this GGSN and/or SGSN with cutting out terminal that side sends and the link information of Correspondent Node.

● cut out side direction incision side and transmit the AID-RID map information of terminal communication opposite end

The mode that present embodiment adopts is designated as mode E1

When having the chain of command interface between the GGSN, the control unit that cuts out of the switch control unit among the GGSN also is used for the AID-RID map information that cuts out the terminal communication opposite end that the mapping management module is preserved is sent to incision GGSN.

Another kind of mode is designated as mode E2

When not having the chain of command interface between the GGSN, this map information from cut out GGSN through cut out SGSN, the incision SGSN be sent to the incision GGSN.Correspondingly:

The control unit that cuts out of the switch control unit among the GGSN also is used for the AID-RID map information that cuts out the terminal communication opposite end that the mapping management module is preserved is sent to SGSN.

More than the variety of way of each function, as long as do not destroy the other side's service condition each other, all can be used in combination.

Interface newly-increased in this enforcement comprises Gl, Gv and Gi interface, and interface name can change.

The Gl interface is the chain of command interface between SGSN and the ILR, is responsible for registration and removes the RID of registration terminal, alternatively, also is used to transmit and terminal off-line notice, signaling that terminal RID update notification is relevant.The Gl interface can be based on the DIAMETER agreement.Close under the situation of establishing at ILR and HSS, the Gl interface can be realized by the Gr interface expansion.

The Gv interface is the chain of command interface between GGSN and the ILR or between PTF and the ILR, is responsible for the RID of inquiry terminal.The Gv interface can be regarded the subclass of Gl interface as.Close under the situation of establishing at ILR and HSS, the Gv interface can be realized by the expansion of Gc interface.Close under the situation of establishing at PTF and ILR, the Gv interface then is an internal interface.

The Gi interface is the interface in the user plane between GGSN and the PTF, is responsible for PTF and transmits data message to GGSN.

Based on the terminal access process of present embodiment one communication network as shown in Figure 8.

Step 801: terminal is initiated PDP and is activated request (with step 401);

After step 802:SGSN nuclear school parameter information is errorless, find the GGSN address, send to GGSN and create context request according to APN.When the terminal use has contracted the AID of IP address format such as static public ip address, carry this IP address (with step 402) in the request;

AID also can be an extended formatting.SGSN can obtain the AID of this terminal from this terminal attaching HLR/HSS when terminal being carried out authentication and authentication, if AID is configured in lane terminal, then the message that is sent by terminal is taken SGSN to.

After step 803:GGSN finishes the foundation of carrying, if it is local when also not preserving the current AID-RID map information of this terminal, for terminal distribution RID and write down the map information of terminal AID and this RID, give the RID that increases to this terminal distribution in the message of SGSN responding;

Step 804:SGSN sends register requirement to ILR after receiving and creating response, carries the AID and the RID of this terminal;

IMSI information also can be carried in the register requirement as the subscriber identity information of terminal, and is used with the inquiry as relevant information.

Step 805:ILR preserves the AID-RID map information of this terminal, returns registration to SGSN and receives the response, and carries IMSI and/or AID information in the message, is used to identify the registration of this terminal;

Step 806:SGSN responds the PDP activation to UE and accepts message;

If AID is not configured in terminal, SGSN activates at the PDP that responds to terminal and accepts also the AID of this terminal to be sent to this terminal in the message.

This step also can be placed on after the step 803 any time so far.

At this moment, the successful access network of terminal, and can begin to carry out the data message transmission.

Step 807:UE uses self AID to be source address, and Correspondent Node AID is as destination address, and the encapsulation of data payload sends datagram;

After step 808:GGSN receives data message, the AID of reading terminals and Correspondent Node, the RID of inquiry terminal and Correspondent Node from the AID-RID map information of storage if find relevant RID information, then encapsulates the back again to the data message and sends;

Step 809: if GGSN does not find RID information, then ask query communication opposite end RID to terminal attaching ground ILR according to AID, when AID was not the address of Home Network distribution or use, ILR searched this terminal attaching ground ILR according to AID, and request is forwarded to this terminal attaching ground ILR;

When AID is not the address of Home Network distribution or use, the ILR that receives query requests comprises that according to its method that belongs to ILR of AID information searching ILR sends to acting on behalf of ILR, send by acting on behalf of ILR, or in ILR, dispose the ownership place ILR information of AID section correspondence, send to terminal attaching ground ILR then.

Step 810: this terminal attaching ground ILR responds the RID to the Correspondent Node of GGSN inquiry, and GGSN is encapsulated in the data message terminal and Correspondent Node RID and transmission.

When above flow process GGSN searches less than Correspondent Node RID in this locality, also data message can be sent to Correspondent Node ownership place PTF, be forwarded to the gateway that the opposite end is inserted by PTF.

Embodiment two

Fig. 9 is the schematic diagram of present embodiment architectures of communication networks.In the present embodiment, newly-increased network element ILR and PTF, AID of this network termination of ILR storage and maintenance and RID map information.PTF and ILR in the mapping Forwarding plane in the corresponding novel framework of PTF and ILR.PTR is optional network element, for GGSN transmits ephemeral data.GGSN and SGSN need carry out function expansion, comprise the what's new module or former module function is strengthened, and finishing the function of ASN jointly, Figure 10 is the functional schematic of SGSN and GGSN in the present embodiment communication network.GGSN is connected to outside PDN network, and this PDN network should be supported by RID route and forwarding, the broad sense Forwarding plane among the pie graph 1b.

The difference of this framework and embodiment one is: the not responsible intercommunication with ILR of SGSN, and the maintenance of the link information of only responsible terminal and Correspondent Node,, the link information of terminal and Correspondent Node passed to cut SGSN because of routing update move taking place and when switching in terminal.GGSN then be responsible for to distribute AID and RID, with the intercommunication of ILR with registration, go to register and the functions such as RID of inquiry terminal.

SGSN is used to terminal that access service and control are provided, and the link information of maintenance terminal and Correspondent Node cooperates switching that realizes the terminal SGSN-spanning and link information from Correspondent Node to incision SGSN that transmit terminal and with other SGSN.

The module relevant with the function expansion comprises:

Connect maintenance module, the link information that is used to preserve terminal and Correspondent Node comprises the correspondence relationship information of terminal AID and Correspondent Node AID; At the terminal off-line or shift out or communicate by letter and stop the link information of back this terminal of deletion and Correspondent Node with Correspondent Node; After knowing the Correspondent Node off-line or stopping, delete the link information of this Correspondent Node and terminal with terminal communication.

The switching controls module is used for terminal is moved to the control of the switching that triggers another SGSN coverage, comprising:

Cut out control unit, be used to realize cut out control that terminal is cut out the back notice in terminal and connect maintenance module, send to and cut SGSN connecting this terminal that maintenance module preserves link information with Correspondent Node.

The incision control unit is used to realize the control to the terminal incision, is saved in the link information of Correspondent Node and is connected maintenance module cutting out this terminal that SGSN sends.

The processed offline module is used for notice connection maintenance module when determining the terminal off-line that inserts; And when definite Correspondent Node off-line, notice connects maintenance module.

GGSN is used for the session connection of maintenance terminal, point to the RID of this GGSN for terminal distribution, to ILR registration, go to register and the RID of inquiry terminal, the AID-RID map information of maintenance terminal and Correspondent Node, realize the route and the forwarding of data message, and cooperate the realization terminal to stride the switching of GGSN with SGSN and other GGSN.

The module relevant with the function expansion comprises:

The station location marker distribution module is used for inserting or set up first carrying or terminal cut process in terminal request and points to the RID of this GGSN for terminal distribution, and the AID of this RID and this terminal is sent to mapping management module and Register Cancel module.

The Register Cancel module is used for asking this terminal attaching ground ILR this terminal RID to be registered the AID of carried terminal and RID after receiving terminal AID and being the RID of this terminal distribution; After knowing the terminal off-line, ask this terminal attaching ground ILR to remove to register the RID of this terminal.

Connect maintenance module, with the mapping management module among embodiment one GGSN.

The mapping management module is with the mapping management module among embodiment one GGSN.

The processed offline module is used for after determining to insert the terminal off-line of this GGSN notice Register Cancel module and mapping management module; And when definite Correspondent Node off-line, notify the mapping management module.

Packet forwarding module is with the packet forwarding module among embodiment one GGSN.Message format is also with the message format among the embodiment one.

The switching controls module is with the switching controls module among embodiment one GGSN.

Identity location register (ILR) is with the ILR among the embodiment one.

Data forwarding function (PTF) is with the PTF among the embodiment one.

Below clearly in SGSN and GGSN, be provided with and be connected maintenance module, only the connection maintenance module has been set certainly at SGSN or GGSN, and by GGSN to the ILR registration, go the RID of registration terminal also to be fine.

Terminal off-line that embodiment one mentions notice, terminal RID update notification and cut out side direction incision side and transmit each of functions such as AID-RID map information of terminal communication opposite end and finish in the mode, except that because do not have between SGSN and the ILR that this restrictive condition of chain of command interface can't carry out, all can be applicable in the present embodiment.

On the basis of embodiment two, if cancellation SGSN goes up the connection maintenance module that is provided with, promptly not in the link information of SGSN maintenance terminal and Correspondent Node, and has interface between the GGSN, terminal off-line notice, terminal RID update notification, cut out side direction incision side and transmit the link information of terminal and Correspondent Node, and cut out side direction incision side when transmitting the functions such as AID-RID map information of terminal communication opposite end and all can finish by this interface, to obtain one and become example, this becomes in the example, SGSN can be with existing SGSN, the function of GGSN is on the basis of embodiment two, the switching controls module of GGSN increases the link information that cuts out side direction incision side transmission terminal and Correspondent Node again, specifically can join aforesaid way D2.

Interface newly-increased in the present embodiment is Gv and Gi interface.

The Gv interface is the interface between GGSN and the ILR, is responsible for registration, goes to register, the RID of inquiry terminal, alternatively, transmits and terminal off-line notice, the signaling that terminal RID update notification is relevant.The Gv interface can be based on the DIAMETER agreement.Close under the situation of establishing at ILR and HSS, the Gv interface can be realized by the Gr interface expansion.

When PTF independently existed, the Gv interface also was the interface between PTF and the ILR, was responsible for querying mapping information.

Based on the terminal access procedure flow process of this communication network as shown in figure 11.

This flow process is compared with user's access process of embodiment one, and difference is that present embodiment initiates register requirement by GGSN, receive response after, respond to SGSN and to create context response information.Specific as follows:

Step 1101: user terminal is initiated PDP and is activated request (with step 401).

After step 1102:SGSN nuclear school parameter information is errorless, find the GGSN address, send to GGSN and create context request according to APN.When the user has contracted static public ip address, carry this IP address in the request, i.e. user's AID.This step is with step 402.

After step 1103:GGSN finishes the foundation of carrying, if it is local when also not preserving the current AID-RID map information of this terminal, for terminal distribution RID and write down the mapping relations of terminal AID and this RID, then send register requirement to terminal attaching ground ILR, carry this terminal AID and RID information;

IMSI information also can be carried as user's identity information, and is used as the inquiry of relevant information.

Step 1104:ILR preserves the AID-RID map information of this terminal, returns registration and receives the response.Carry IMSI or AID information in the message, be used to identify the registration of this terminal;

After step 1105:GGSN receives response, responding to increasing parameters R ID in the message of SGSN;

Step 1106:SGSN responds the PDP activation to UE and accepts message, as not disposing AID among the UE, AID is carried at sends to UE in the message.

At this moment, the successful access network of terminal, and can begin to carry out the data message transmission.The step of follow-up data message transmission is with embodiment one.

Implement three

Figure 12 is the schematic diagram of present embodiment three communication network frameworks, in the present embodiment, newly-increased network element ILR, be used to store present networks user terminal the AID-RID map information and safeguard, can also increase network element PTF newly, be used to GGSN to transmit ephemeral data.GGSN among the figure and SGSN need carry out the function expansion, strengthen as the what's new module or to former module function, to finish the function of ASN jointly.Figure 13 is the functional schematic of GGSN and SGSN in this framework.GGSN is connected to the packet data network (PDN) of support by RID route and forwarding, the broad sense Forwarding plane of pie graph 1b.

The difference of communication network and embodiment one is in the present embodiment: the not responsible RID to the ILR inquiry terminal of GGSN, all inquiries are finished by SGSN, and notify GGSN.GGSN only finishes and distributes RID, and record AID-RID map information reaches encapsulation and decapsulation, forwarding data message.

SGSN is used to terminal that access service and control are provided, to terminal attaching ground ILR registration, go to register and the RID of inquiry terminal the link information of maintenance terminal and Correspondent Node, and the switching that cooperates realization terminal SGSN-spanning with other SGSN.

The functional module relevant with the function expansion comprises:

The Register Cancel module is with the Register Cancel module among embodiment one SGSN.

Map query module is used for after receiving query requests according to Correspondent Node AID to the corresponding RID of this Correspondent Node ownership place ILR inquiry, the AID-RID map information of the Correspondent Node that inquires is returned to query requests side, as GGSN.

The processed offline module is with the processed offline module among embodiment one SGSN.

The switching controls module is with the switching controls module among embodiment one SGSN.

GGSN is used for the session connection of maintenance terminal, point to the RID of this GGSN for terminal distribution, the AID-RID map information of maintenance terminal and Correspondent Node is realized the route and the forwarding of data message, and cooperates the realization terminal to stride the switching of GGSN with SGSN and other GGSN.

The module relevant with the function expansion comprises:

The station location marker distribution module is with the station location marker distribution module among embodiment one GGSN.

The processed offline module is with the processed offline module among embodiment one GGSN.

The switching controls module is with the hand-off process module among embodiment one GGSN.

Packet forwarding module basically with the packet forwarding module among the GGSN, also comprises first retransmission unit and second retransmission unit.Difference is: GGSN is to send out query requests to SGSN when the RID of query communication opposite end, carries the AID of this Correspondent Node, and the Query Result that reception SGSN returns also is saved in the mapping management module.

Identity location register (ILR) and data forwarding function (PTF) are with ILR and the PTF of embodiment one.

The setting of the connection maintenance module that embodiment one mentions, terminal off-line notice, terminal RID update notification and cut out side direction incision side and transmit each of functions such as AID-RID map information of terminal communication opposite end and finish in the mode, except that because do not have between GGSN and the ILR that this restrictive condition of chain of command interface can't carry out, all can be applicable in the present embodiment.

Interface newly-increased in this enforcement is Gv, Gl and Gi interface.

The Gl interface is the chain of command interface between SGSN and the ILR, is responsible for registration, goes to register and the RID of inquiry terminal, alternatively, also is used to transmit and terminal off-line notice, signaling that terminal RID update notification is relevant.The Gl interface can be based on the DIAMETER agreement.Close under the situation of establishing at ILR and HSS, the Gl interface can be realized by the Gr interface expansion.

Based on the endpoint registration of present embodiment communication network and query script flow process as shown in figure 14.

This flow process is compared with user's access process of embodiment one, and difference is query script.The query script of present embodiment is initiated query requests by GGSN to SGSN, and SGSN inquires about to ILR after the request of receiving.Specific as follows:

Step 1401-1408: with the corresponding step of the corresponding flow process of embodiment one;

Step 1409: in the step 1408,, then, carry Correspondent Node AID in the information to SGSN request inquiry if GGSN does not find Correspondent Node RID information, also can carried terminal AID, the IMSI information of terminal and in the tunnel information one or more;

After step 1410:SGSN receives query requests, if check that the AID-RID map information of the maintenance of oneself does not have relevant information yet, then inquires about to ILR;

After step 1411:ILR receives request, the RID of query communication opposite end AID correspondence.When this AID was not the address of Home Network distribution or use, ILR searched Correspondent Node ownership place ILR according to this AID, and request is forwarded among this ownership place ILR, and this ownership place ILR responds the RID information to the described Correspondent Node of SGSN;

Step 1412:SGSN responds the RID information to the described Correspondent Node of GGSN, and GGSN is encapsulated in data message and transmission as source, destination address the RID of terminal and Correspondent Node.

Annotate: when AID was not the address of Home Network distribution or use, ILR comprised that according to method of its ownership of AID information searching ILR ILR sends to acting on behalf of ILR, sends by acting on behalf of ILR, or dispose the ILR information of AID section correspondence in ILR, ILR transmission then.

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

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

Claims

1. system that realizes mobile communication based on the WCDMA core net, comprise wireless access network, service GPRS node (SGSN) and critical point GPRS node (GGSN), it is characterized in that, also comprise the identity location register (ILR) that is connected with SGSN and/or GGSN, wherein:

2. the system as claimed in claim 1 is characterized in that, described GGSN comprises:

3. system as claimed in claim 2 is characterized in that, described GGSN also comprises the processed offline module:

Described mapping management module is known that terminal cuts out or during off-line, is deleted the AID-RID map information of this terminal, deletes the AID-RID map information that does not have the Correspondent Node of correspondence in this terminal communication opposite end with the other-end that inserts this GGSN; When knowing all terminal communications terminations of Correspondent Node off-line or Correspondent Node and this GGSN of access, the AID-RID information of deleting this Correspondent Node

4. as claim 2 or 3 described systems, it is characterized in that described packet forwarding module comprises first retransmission unit and second retransmission unit, wherein:

5. system as claimed in claim 4 is characterized in that,

6. system as claimed in claim 4 is characterized in that,

7. as claim 4 or 5 or 6 described systems, it is characterized in that,

8. system as claimed in claim 2 is characterized in that, has the interface of registering and removing registration terminal RID between described SGSN and the ILR, comprises among the described SGSN:

9. system as claimed in claim 2 is characterized in that, has the interface of registering and removing registration terminal RID between described GGSN and the ILR, and described GGSN also comprises the Register Cancel module, wherein:

10. system as claimed in claim 2 is characterized in that,

11. system as claimed in claim 3 is characterized in that, described GGSN also comprises the connection maintenance module, wherein:

The control unit that cuts out of the switching controls module among the GGSN also is used for cutting out the connection maintenance module that GGSN is notified in the back in terminal;

12., it is characterized in that described SGSN comprises as the described system of claim 2,3 or 11:

13. system as claimed in claim 12 is characterized in that:

14. system as claimed in claim 8 is characterized in that:

The processed offline module is carried the AID of this terminal and the RID of Correspondent Node among described SGSN or the GGSN in the terminal off-line notice that sends to terminal attaching ground ILR, or carries the AID-RID map information of this terminal AID and Correspondent Node; Perhaps, SGSN or GGSN also comprise an information synchronization module, are used for the RID with the terminal communication opposite end, or the AID-RID map information is synchronized to terminal attaching ground ILR in real time or regularly.

15. system as claimed in claim 12 is characterized in that:

16. system as claimed in claim 11 is characterized in that:

17. system as claimed in claim 12 is characterized in that:

18. system as claimed in claim 8 is characterized in that:

19. system as claimed in claim 2 is characterized in that:

20. system as claimed in claim 2 is characterized in that:

21. system as claimed in claim 8 is characterized in that:

22. system as claimed in claim 8 or 9 is characterized in that:

23., it is characterized in that as claim 18 or 19 described systems:

24. system as claimed in claim 2 is characterized in that:

25., it is characterized in that as claim 18 or 19 described systems:

26. system as claimed in claim 8 is characterized in that:

27. the system as claimed in claim 1 is characterized in that:

28. a terminal inserts the method for system according to claim 1, comprising:

29. method as claimed in claim 28 is characterized in that:

30., it is characterized in that described SGSN obtains the AID of terminal in the following manner as claim 28 or 29 described methods:

31. method as claimed in claim 28 is characterized in that, the IP address allocated when AID of described terminal contracts for the terminal use.

32. method as claimed in claim 28 is characterized in that:

Described GGSN if the current AID-RID map information of this terminal is not also preserved in this locality, then writes down the map information of this terminal AID and RID after being terminal distribution RID.

33. a terminal inserts the method for system according to claim 1, comprising:

34. method as claimed in claim 33 is characterized in that:

35., it is characterized in that described SGSN obtains the AID of terminal in the following manner as claim 33 or 34 described methods:

36. method as claimed in claim 33 is characterized in that, the IP address allocated when AID of described terminal contracts for the terminal use.