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Method for implementing session switch in IP multimedia subsystem centralized control service

A multimedia subsystem and centralized control technology, applied in communication supplementary services, wireless network protocols, electrical components, etc., can solve the problem of not implementing ICS architecture single wireless channel voice business continuity domain switching, etc., to save session control paths, The effect of simplified switching techniques

Inactive Publication Date: 2009-06-17
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0073] In the prior art, there is a problem that single-session handover requires the session control path to perform the above-mentioned VCC domain handover; in addition, there is no technology in the existing SRVCC technology to realize single-radio channel voice business continuity domain handover under the ICS architecture

Method used

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  • Method for implementing session switch in IP multimedia subsystem centralized control service
  • Method for implementing session switch in IP multimedia subsystem centralized control service
  • Method for implementing session switch in IP multimedia subsystem centralized control service

Examples

Experimental program
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no. 1 example

[0154] The core idea of ​​the first embodiment is: UE-A directly uses the VDN to initiate a session establishment to the CSCF, the CSCF anchors the established session to the ICS AS, and the ICS AS then uses the VDN as the routing number to route the established session To the DTF, the DTF switches the session from the IMS domain to the CS domain at the service layer according to the VDN, and notifies the remote end to update the bearer.

[0155] image 3 It is a flow chart of implementing single-session domain switching without using session control path in the first embodiment of the present invention, as shown in image 3 As shown, UE-A establishes a session with UE-B in the IMS domain, and the session is anchored in ICS AS and DTF. The specific process is as follows:

[0156] 301. UE-A initiates a call establishment request to MSC to establish a bearer control path. The request carries a VDN, which is allocated by DTF when UE-A establishes a session with UE-B, or is a def...

no. 2 example

[0236] The core idea of ​​the second embodiment is: UE-A directly uses the VDN to initiate a call establishment request to the MSC, and the MSC sends an intelligent message to the ICS AS according to the calling intelligent service information, and the ICS AS assigns an ICS ASid to the MSC; ASid is used as the called number to initiate a session to CSCF, CSCF routes the established session to ICS AS through ICS ASid, ICS AS replaces the ICS ASid of the session with VDN, and uses VDN to route the established session to DTF, The DTF switches the session from the IMS domain to the CS domain at the service layer according to the VDN.

[0237] Figure 4 It is a flow chart of implementing single-session domain switching without using session control path in the second embodiment of the present invention, as shown in Figure 4 As shown, UE-A establishes a session with UE-B in the IMS domain, and the session is anchored in ICS AS and DTF. The specific process is as follows:

[0238]...

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Abstract

The invention relates to a method for controlling a business configuration to realize the session switching in an IP multimedia sub-system, when first session which is anchored in an ICS AS and a DTF is established on the a first user end UE-A and a second user end UE-B, and when the UE-A needs switching the conversion into a CS region for accessing, the method comprises the following steps: the UE-A or an S-IWF accessed by the UE-A transmits the calling requirement with a VDN to an ICS AS for establishing a loading control path, the ICS AS transfers the SIP session requirement information which is corresponding to the calling requirement and comprises the VDN to a DTF, and the DTF switches the first session into the CS region for accessing from a business layer according to the VDN. Adopting the method of the invention can realize the switching of a VCC between a double-communication channel and a single session channel, and the session control path is not used when switching the VCC of the single session, which simplifies the switching technique and saves the session control path.

Description

technical field [0001] The invention relates to a method for realizing session switching under the centralized control service of an IP (Internet Protocol) multimedia subsystem. Background technique [0002] The IP Multimedia Core Network Subsystem (IMS) is an IP-based next-generation network architecture proposed by the 3rd Generation Partnership Project (3GPP), which builds an open and Flexible business environment supports multimedia applications and provides users with rich multimedia services. [0003] IMS has nothing to do with access technology, except that it can provide services for packet switched (Packet Switched, PS) access networks such as GPRS (General Packet Radio Service, General Packet Radio Service), WLAN (Wireless Local Area Network, Wireless Local Area Network), It can also provide basic voice services for GSM (Global System for Mobile communications, Global System for Mobile Communications), UMTS (Universal Mobile Telecommunications System, Unified Mobi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/14H04W4/16H04W36/14H04W80/04
Inventor 游世林余志铭郝振武蔡继燕胡英
Owner ZTE CORP