CN101039334A

CN101039334A - Method for canceling IP address

Info

Publication number: CN101039334A
Application number: CN200610059822.2A
Authority: CN
Inventors: 李振东
Original assignee: ZTE Corp
Priority date: 2006-03-15
Filing date: 2006-03-15
Publication date: 2007-09-19
Anticipated expiration: 2026-03-15
Also published as: WO2007104191A1; CN100536484C

Abstract

The present invention discloses an IP address logout method for a 3GPP2 IP multimedia subsystem network, wherein, when an user equipment performs login, an user sign and IP address are sent to an adscription user server which memorizes the relevancy relationship between the user sign and IP address; when a meeting gateway for supporting the user equipment initiates the IP address logout of the user equipment, the IP address releases messages, and after authentication, authorization and accounting server (also called AAA server), those messages are sent to a adscription user server of a multimedia subsystem adscription network; the adscription user server determines whether a relevancy relationship is existed between the login user equipment and the IP address in those messages, if yes, the normal logout process for the user equipment is initiated. The invention solves the problem of out-synchronization which may exist in a PS region logout and an IMS region logout, changes little about the user login/logout process in present IMS standards, and has excellent compatibility.

Description

A kind of IP address cancel method

Technical field

The present invention relates to the mobile communication technology field, particularly the method that IP address is nullified in 3GPP2 IMS network.

Background technology

Along with the development of wireless technology, mobile communication can not only provide traditional speech business, and various multimedia application simultaneously are as video, meeting, to present (presence) professional or the like.Simultaneously, mobile core network is also experiencing from the evolution of traditional circuit switching to the ALL IP network.

Under this background, third generation partner program (3GPP) and third generation partner program 2 (3GPP2) tissue have all successively proposed the IP Multimedia System (IPmultimedia subsystem is hereinafter to be referred as IMS) based on the ALL IP network.

IMS is the call control system of an application layer, and it is to be superimposed upon on packet switching (PacketSwitch is hereinafter to be referred as the PS) territory.Be that the PS territory can individualism, provide Packet Service, and IMS must be based upon on the PS territory.

Fig. 1 has described the process of user IMS registration in the existing standard, subscriber equipment (UserEquipment, hereinafter to be referred as UE) at first and IAD (Access Gate Way, hereinafter to be referred as AGW) set up peer-peer protocol (Point-to-Point Protocol, be called for short PPP) session, AGW gives UE distributing IP address; Thereafter, UE initiates Proxy-Call Session Control Function (Proxy-Call SessionControl Function is hereinafter to be referred as P-CSCF) discovery procedure; At last, initiate the registration of IMS application layer.

Simultaneously, 3GPP standard TS23.228 and 3GPP2 standard x .S0013-002 have proposed following 3 kinds of IMS and have nullified mode:

A) IMS that initiatively initiates of UE nullifies;

B) IMS of home subscriber server (Home Subscriber Server is hereinafter to be referred as HSS) initiation nullifies;

C) IMS of service-call session control function (Serving CSCF is hereinafter to be referred as S-CSCF)/application server (Application Server is called for short AS) initiation nullifies.

More than three kinds of modes all be the cancellation of application layer in essence, its starting point all is that the carrying of bottom is normal.But the IMS territory is superimposed upon on the PS territory, an IMS user, and it at first also is the user in PS territory.When making that owing to specific reasons the IP address of UE has been nullified in the PS territory, present mechanism can't in time be notified IMS territory control network element, and this user also should be canceled in the IMS territory.

Do not address the above problem and will cause, user's IP address has been canceled, and the IP carrying of bottom is also no longer valid, but this user still is in login state in the IMS application layer.This just causes in some IMS business, and state of user is wrong, be canceled as the IP address of user A, but the IMS registration is normal, and find that this user A unreachable when exhaling at this user's end this moment.For simple IP, because the IP address is a dynamic assignment, AGW is behind the IP address of logging off users A, other user can have been distributed in this IP address, for example distributes to user B, and this moment is in the IMS application layer, think and this IP address and user A binding still come down to the address of user B.This will cause the inconsistent of system mode, may have potential safety hazard.And everything may to arrive always IMS regularly heavily registration could solve when expiring, this moment, the user was canceled in the IMS territory owing to heavily registering less than IMS on time.

Summary of the invention

The problem to be solved in the present invention provides a kind of IP address cancel method, guarantees in the IMS core net consistency between IP address and the user.That is, when the IP address of UE was canceled, the IMS user ID of registering on this IP address (User Identity) also should be canceled.

In order to solve the problems of the technologies described above, the invention provides a kind of IP address cancel method, be used for 3GPP2 IP Multimedia System network, may further comprise the steps:

(a) in the process of user equipment registration, user ID and IP address are sent to its home subscriber server, this home subscriber server is preserved the incidence relation of this user ID and IP address thereof;

(b) in the process that subscriber equipment is nullified, the IAD of carrying subscriber equipment is initiated user device IP address and is nullified, and IP address release message is sent to the AAA server of consolidated network, i.e. aaa server;

(c) described aaa server judges whether this subscriber equipment is the present networks user, if, then this aaa server is exactly the aaa server of this subscriber equipment home network, direct execution in step (d), otherwise, IP address release message is sent to the aaa server of the packet switching network of this subscriber equipment ownership, execution in step (d) again;

(d) after the aaa server of home network is received described IP address release message, this message is sent to the home subscriber server of User IP IP multimedia subsystem, IMS home network;

(e) home subscriber server of described home network judges whether the IP address correlation in registered subscriber equipment and this message, if having, then initiates the normal logout flow path to this subscriber equipment, if do not have, directly finishes.

Further, said method also has following characteristics: in the registration process of described step (a), after service-call session control function was received user's registration message, Put and Pull message to described home subscriber server transmission Cx interface comprised described user device IP address in the message; After described home subscriber server is received this message, preserve the incidence relation of this subscriber equipment and IP address thereof, and return service inventory.

Further, said method also has following characteristics: the IAD of the subscriber equipment of carrying described in the described step (b) is nullified user device IP address earlier, IP address release message is sent to the aaa server of consolidated network again.

Further, said method also has following characteristics: aaa server described in the described step (c) is to judge according to the network access identifier of subscriber equipment whether this subscriber equipment is the present networks user.

Further, said method also has following characteristics: described IAD is a packet data serving node.

Compared with prior art, the invention has the advantages that having solved the cancellation of PS territory nullifies the asynchronous problem that may exist with the IMS territory, and the present invention is very little to the registration of the user in the existing IMS standard, the change of cancellation related procedure, has good compatibility.

Description of drawings

Fig. 1 is the IMS register flow path figure of UE;

Fig. 2 is a network annexation schematic diagram;

Fig. 3 is the logout flow path figure of first embodiment of the invention UE at visited network;

Fig. 4 is the logout flow path figure of second embodiment of the invention UE at home network.

Embodiment

The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.

Fig. 2 is the signaling interface annexation between UE, visited network, the home network.Among the figure, the dotted line between the network element is represented signaling interface, the solid lines represent data interface.At this moment, UE is in the visited network.AGW is packet data serving node (Packet Data Serving Node is called for short PDSN).AAA is AAA server (Authentication, Authorization, Accounting are called for short AAA or aaa server).

Existing signaling flow between UE and the AGW also has data flow; Between UE and the P-CSCF, between P-CSCF and the I/S-CSCF (I-CSCF, Interrogating CSCF, interrogation-call session control function), between I/S-CSCF and the HSS IMS Applied layer interface is arranged; Between visit AAA and the ownership AAA signaling interface is arranged; Between ownership AAA and the ownership HSS signaling interface is arranged.

Between AGW and the AAA, between visit AAA and the ownership AAA, ownership AAA and ownership all can adopt Diameter or Radius agreement between the HSS.

Wherein, described P-CSCF can be positioned at visited network, also can be positioned at home network, and these two kinds of situations do not impact this method.

The design of IP address cancel method described herein is: when the IP address of PS territory logging off users UE, the IP logout message of user UE is sent to the HSS of user IMS home network; If ownership HSS finds the user of this IP address correspondence and does not also nullify in the IMS territory, then initiates normal IMS user log off flow process by ownership HSS.Need on HSS, store IP address, so that the HSS inquiry for this reason.

This moment, UE was in visited network, initiated the registration of IMS application layer.The register flow path and the existing procedure among Fig. 1 of the inventive method are basic identical, and difference is: in the step 160, S-CSCF not only sends user ID, S-CSCF name/address, and comprises the IP address of UE; In step 170, HSS not only preserves user ID, S-CSCF name/address, and preserves the IP address of UE.The step of the inventive method is as follows:

Step 100, UE and AGW set up the PPP session, and AGW gives UE distributing IP address;

Step 105, UE initiates the P-CSCF discovery procedure, obtains P-CSCF title and/or address;

Step 110, UE sends registration message to P-CSCF;

Step 120, P-CSCF sends to registration message the I-CSCF of user attaching network;

Step 130, I-CSCF is to HSS inquiry S-CSCF information;

Step 140, HSS returns the S-CSCF tabulation to I-CSCF;

Step 150, I-CSCF selects a S-CSCF from tabulation, transmits registration message;

Step 160, S-CSCF is to the Put and the Pull message of HSS transmission Cx interface, i.e. Cx-Put/Cx-Pull message (comprising open user identity, private user identity, S-CSCF name and IP address);

Step 170, the IP address of HSS storage user ID, S-CSCF name and UE, and return user's service inventory, i.e. Profile information to S-CSCF;

Step 180, based on the inceptive filtering criterion among the Profile, S-CSCF carries out professional control;

Step 185,190,195, S-CSCF sends sip message 200 OK of standard to the user, and this message arrives UE along I-CSCF and P-CSCF.

First embodiment

Fig. 3 has shown a signaling process example of the present invention, and this moment, UE was in visited network, the signaling process when AGW initiates the IP address cancel, and step is as follows:

Step 210, AGW nullifies the IP address of UE;

Step 220, AGW sends UE IP address cancel message to the AAA of present networks;

Step 230 after AAA receives message, judges that UE is another one network PS field user, and visit AAA inserts identifier (Network Access Identifier is called for short NAI) according to user network, release message is forwarded to the AAA of the PS home network of UE;

Step 240 after ownership AAA receives IP address cancel message, sends IP address cancel message to ownership HSS;

Step 250 after ownership HSS receives IP address cancel message, has judged whether registered user and this IP address correlation, if having, ownership HSS initiates normal IMS user log off flow process, if do not have, finishes.

Second embodiment

Fig. 4 has shown a signaling process example of the present invention, and this moment, UE was in home network, the signaling process when AGW initiates the IP address cancel, and step is as follows:

Step 310, AGW nullifies the IP address of UE;

Step 320, AGW sends UE IP address cancel message to the AAA of present networks;

Step 330 after AAA receives message, judges that UE is present networks PS territory contracted user, sends IP address cancel message to ownership HSS;

Step 340 after ownership HSS receives IP address cancel message, has judged whether registered user and this IP address correlation, if having, ownership HSS initiates normal IMS user log off flow process, if do not have, finishes.

Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.

Claims

1, a kind of IP address cancel method is used for 3GPP2 IP Multimedia System network, may further comprise the steps:

2, the method for claim 1, it is characterized in that, in the registration process of described step (a), after service-call session control function is received user's registration message, Put and Pull message to described home subscriber server transmission Cx interface comprise described user device IP address in the message; After described home subscriber server is received this message, preserve the incidence relation of this subscriber equipment and IP address thereof, and return service inventory.

3, the method for claim 1 is characterized in that, the IAD of the subscriber equipment of carrying described in the described step (b) is nullified user device IP address earlier, IP address release message is sent to the aaa server of consolidated network again.

4, the method for claim 1 is characterized in that, aaa server described in the described step (c) is to judge according to the network access identifier of subscriber equipment whether this subscriber equipment is the present networks user.

5, the method for claim 1 is characterized in that, described IAD is a packet data serving node.