Customer closedown forwarding method for IP multimedia subsystem centralized service

Abstract

The invention relates to a method of transfer before user shutdown of IP multimedia subsystem concentrated business, which comprises: firstly, an ICCF unit sends converted called request message to a visit mobile switching centre, the visit mobile switching centre finds a called user shutdown, the visit mobile switching centre sends mobile application part error response messages to the ICCF unit, and the mobile application part error response messages carry called user shutdown cause value; then the ICCF unit maps the mobile application part error response messages to session initiation protocol response messages, the session initiation protocol response messages carry the called user shutdown cause value, and the session initiation protocol response messages are transferred to a telecommunications application server; at last, the telecommunications application server controls trigger of business transfer before shutdown according to the called user shutdown cause value carried by the session initiation protocol response messages. In addition, judgement on whether shutdown is needed or not can be carried on a home user server. When the invention is applied, IMS domain does not need to obtain shutdown state of ICS UE as CS is accessed, and the realization of the business transfer before user shutdown of an IMS concentrated business terminal is completed.

Description

technical field [0001] The present invention relates to the field of communication, and more specifically relates to a method for turning off and forwarding centralized service users of an IP multimedia subsystem. Background technique [0002] IP (Internet Protocol, referred to as IP) multimedia subsystem (IP Multimedia Core Network Subsystem, referred to as IMS) is an IP-based network architecture proposed by the 3rd Generation Partnership Project (3GPP) , which builds an open and flexible service environment, supports multimedia applications, and provides users with rich multimedia services. [0003] IMS is an IP-based telecommunications network architecture, which has nothing to do with access technology, except for GPRS (General Packet Radio Service, General Packet Radio Service), WLAN (Wireless Local Area Network, Wireless Local Area Network) and other packet switching (Packet Switched, referred to as PS ) access network to provide services, it can also provide service...

AI Technical Summary

Problems solved by technology

In the existing IMS centralized control service, the IMS domain does not know the shutdown state of the ICS UE, especially the situation where the VLR sets the inactive user to the shutdown state is difficult to solve, so the CS service user shutdown forwarding is realized through the existing technology In IMS domain control is still very difficult to achieve

Images