CN101106802A

CN101106802A - A method for preventing call session control function entity from active resource hangup

Info

Publication number: CN101106802A
Application number: CNA200610098756XA
Authority: CN
Inventors: 孙闵; 汤凯; 张宝健; 汪军
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2006-07-12
Filing date: 2006-07-12
Publication date: 2008-01-16
Anticipated expiration: 2026-07-12
Also published as: CN100589641C

Abstract

The invention provides a method for preventing call/session control functional entity active resource from hanging. After recovery of session border controller failure is finished, a failure recovery message is transmitted to an access call/session control functional entity; and after receiving the failure recovery message, the access call/session control functional entity releases all the user resources of active session accessed from the session border control and notifies other call/session control functional entities to release all user resources of active session accessed from the session border control. The inventive method can notify a call/session control functional entity to release correspondent resources after a session border controller failure is recovered, thereby preventing resources hanging.

Description

A kind of method that prevents the call conversation control function entity active resource hangup

Technical field

When carrying out session, the processing policy after the abnormal conditions appears in SBC from SBC (Session Border Control, session border control appliance) access IMS (IP Multimedia Subsystem) to the present invention relates to the user.

Background technology

Development along with mobile communication technology, single speech communication mode can not satisfy user's needs, what the user needed is a kind of emerging multi-media communication mode, this communication modes can not only be handled basic voice and video communication, can also support functions such as instant message, collaborative work and Streaming Media.3GPP has proposed IP Multimedia System (IMS, IP MultimediaSubsystem) on the basis of packet domain.

Topmost functional entity has CSCF (Call Session Control Function among the IMS, call conversation control function entity), HSS (Home Subscriber Server, home subscriber server) and and network element BGCF (the Border Gateway Control Function of CS/PSTN intercommunication, the Breakout Gateway Control Function entity), MGCF (Media Gateway Control Function, MGCF entity).CSCF has three kinds of logic entity P-CSCF (access call conversation control function entity), I-CSCF (enquiry call conversation control function entity) and S-CSCF (service call session control function entity).Wherein, P-CSCF is the access point that the user inserts the IMS network; I-CSCF can serve as all users' of network tie point when called (), also can be as the Service Access Point of roamer in the current network service area.S-CSCF finishes CCF, finishes professional the triggering and professional control.BGCF is used for selecting the network that links to each other with the CS/PSTN point of interface.Main and the media gateway of MGCF is finished media control function together.

When fixed-line subscriber inserts IMS, SBC (Session BorderControl) equipment will appear on the access border of network.This equipment can be carried out band-width tactics to each Media Stream as a dynamic pin fire compartment wall, and protection IMS core net exempts from DoS attack, and hides the topology information of core net to Access Network; Can carry out and insert specific permission control, and when QoS identifies, carry out the strategy of operator; Can support the NAT Firewall Traversing in the B2BUA mode, the functions such as connection of SIP client behind the support NAT fire compartment wall.

When the user carried out session from SBC access IMS network, session control signaling found the called subscriber by the CSCF that SBC is delivered to the IMS core network by route.After session is set up, the medium between the user will send to the session opposite end by SBC.In conversation procedure, if SBC equipment is owing to break down unusually, because CSCF does not have the Media Stream process, after the SBC fault recovery, CSCF can't check whether the session of having set up discharge.

Summary of the invention

The present invention solves the user when SBC inserts IMS and carries out session, and SBC occurs unusual, prevents that after the SBC fault recovery active session resource from hanging dead problem.

In order to solve the problems of the technologies described above, the invention provides a kind of method that prevents the call conversation control function entity active resource hangup, may further comprise the steps:

Step 110: after the fault recovery of session border control appliance is finished, send fault recovery message to inserting call conversation control function entity;

Step 120: after described access call conversation control function entity is received the fault recovery notification message, release is controlled the user resources of all active session that insert from session border, and notifies other call conversation control function entities to discharge from the user resources of all active session of session border control access.

Further, said method can also have following characteristics: it is characterized in that, before the described step 110, comprise that also caller passes through the session border control appliance and send message to call conversation control function entity, call out calledly, called terminal ringing and off-hook are set up and the active session of caller, in caller and incoming call process, abnormal failure appears in the session border control appliance.

Further, said method can also have following characteristics: it is characterized in that after caller and incoming call were set up, caller sent Media Stream to called by the session border control appliance.

Further, said method can also have following characteristics: it is characterized in that in the described step 110, the session border control appliance sends fault recovery message, adopts registration message.

Further, said method can also have following characteristics: it is characterized in that, described registration message, wherein, what filled in the contact address is the sign of session border control appliance, the inefficacy parameter of carrying equals 0, and FROM and TO fill in the sign of session border control appliance, and the request row is filled in the sign that inserts call conversation control function entity.

Further, said method can also have following characteristics: it is characterized in that, in the described step 120, to be linked into all active session that insert all users on the call conversation control function entity from this session border control appliance, send byebye message to call conversation control function entity by the session border control appliance, notice all-calls conversation control function entity discharges all active session that insert from the session border control appliance.

Adopt method of the present invention after the SBC fault recovery, to notify CSCF to discharge corresponding resource, prevent that the resource extension is dead.

Description of drawings

The block diagram that Fig. 1 carries out session for the terminal that the present invention inserts from SBC.Solid line partly is a signaling flow among the figure, and dotted portion is a Media Stream.

Embodiment

The present invention proposes a kind of when inserting IMS from SBC and carry out session, and SBC breaks down in caller and the incoming call process, and after fault recovery, prevents that CSCF from going up resource and hanging dead method.May further comprise the steps:

After step 110:SBC fault recovery is finished, its fault recovery of access CSCF that notice is connected with this SBC;

Before the described step 110, comprise that also caller passes through the session border control appliance and send message to call conversation control function entity, call out called, called terminal ringing and off-hook, the active session of foundation and caller, in caller and incoming call process, abnormal failure appears in the session border control appliance.

After caller and incoming call were set up, caller sent Media Stream to called by the session border control appliance.

The mode of notice can be to send REGISTER (registration) message, and what wherein CONTACT (contact address) filled in is the sign of SBC, and the EXPIRES that carries (inefficacy) parameter equals 0; FROM and TO fill in the sign-on ID of SBC, and REQUESTLINE (request row) fills in the sign that inserts CSCF.Can certainly be other message or self-defining message.

Described FROM and TO specifically refer to the initiator and the side of being registered of this time registration.If it is consistent that FROM and TO fill in, show that the SBC representative is own to register; If TO extends this as other, show that SBC represents content registration that TO identifies.

Step 120: after access CSCF receives the fault recovery notification message of SBC, know that the SBC equipment fault recovers to finish, discharge all user resources by the active session of this SBC access.Simultaneously, insert CSCF and send a notification message, notify it to discharge all user resources by the active session of this SBC access to other CSCF.

Described other movable CSCF refer to the user and are initiated to called calling by SBC, not only relate to inserting CSCF, also relate to other CSCF on the call chain.

For example, send BYE (goodbye) message by SBC and give other CSCFs relevant, notify these CSCF releasing activity sessions with these sessions at be linked into all active session that insert all users on the CSCF from this SBC.

Though describe embodiments of the invention in detail in conjunction with the above-mentioned application of diagrammatic sketch, but this is not a practical application unique method of the present invention, for those skilled in the art, still can modify and do not change the spirit and scope of the invention above-mentioned execution mode.

Claims

1. method that prevents the call conversation control function entity active resource hangup may further comprise the steps:

Step 110: after the fault recovery of session border control appliance was finished, the transmission fault recovery was notified to the access call conversation control function entity with this session border control connection;

2. method according to claim 1 is characterized in that:

3. as method as described in the claim 2, it is characterized in that:

4. method according to claim 1 is characterized in that:

In the described step 110, the fault recovery notice that the session border control appliance sends adopts registration message.

5. as method as described in the claim 4, it is characterized in that:

Described registration message, wherein, what filled in the contact address is the sign of session border control appliance, and the inefficacy parameter of carrying equals 0, and FROM and TO fill in the sign of session border control appliance, and the request row is filled in the sign that inserts call conversation control function entity.

6. method according to claim 1 is characterized in that:

In the described step 120, to be linked into all active session that insert all users on the call conversation control function entity from this session border control appliance, send byebye message to call conversation control function entity by the session border control appliance, notice all-calls conversation control function entity discharges all active session that insert from the session border control appliance.