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Method and base station for switching IP multimedia subsystem emergency calls

A multimedia subsystem and emergency call technology, applied in emergency/dangerous communication services, nan, electrical components, etc., can solve problems such as abnormal interruption of emergency calls, achieve the effect of ensuring normal progress, continuous emergency call services, and improving user experience

Inactive Publication Date: 2009-11-11
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0034] In view of this, the present invention provides an IP multimedia subsystem emergency call switching method and a base station to solve the problem in the prior art that the emergency call is abnormally interrupted because the target cell is the UE's roaming restricted cell

Method used

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  • Method and base station for switching IP multimedia subsystem emergency calls
  • Method and base station for switching IP multimedia subsystem emergency calls
  • Method and base station for switching IP multimedia subsystem emergency calls

Examples

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Embodiment 1

[0094] In this embodiment, taking intra-MME handover as an example, the foregoing handover method provided by the embodiment of the present invention is described.

[0095] Figure 7 It is a specific flow chart of this embodiment. In this embodiment, the UE moves to the target cell and is currently making a call, such as Figure 7 As shown, the intra-MME handover according to the above handover method provided by the embodiment of the present invention mainly includes the following steps:

[0096] Step S701, the source eNodeB judges whether the UE is currently making an emergency call according to the emergency call bearer identifier carried in the bearer information of the media bearer of the current call, if yes, prepares to initiate a handover, and proceeds to step S702, if not, follows figure 2 in the process;

[0097] Step S702, in the handover execution stage, the source eNodeB notifies the UE to switch to the target eNodeB, and is responsible for forwarding the downl...

Embodiment 2

[0101] In this embodiment, taking cross-MME handover as an example, the specific implementation of the technical solution provided by the embodiment of the present invention is described in detail.

[0102] Figure 8 It is the implementation flowchart of this embodiment, such as Figure 8 As shown, this embodiment mainly includes the following steps:

[0103] Step S801, the source eNodeB judges whether the UE is making an emergency call according to the emergency call bearer identifier carried in the bearer information of the media bearer of the current call, if yes, it needs to initiate a handover, and proceed to step S802; image 3 process for processing;

[0104] In this way, even though the target cell is in the roaming restriction list of the UE, since the UE is currently making an emergency call, the source eNodeB still determines to initiate a handover to the target cell.

[0105] Step S802-Step S803, after receiving the handover request message from the source eNode...

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Abstract

The invention discloses a method and a base station for switching IP multimedia subsystem emergency calls. In the method, when a source base station determines to initiate a switch, the source base station determines that user equipment currently carries out an emergency call and then initiates the switch to a target cell according to an emergency-call bearing identifier carried in bearing information of a media bearer of the emergency call. According to a technical proposal provided by the invention, the normal proceeding of the emergency call can be guaranteed so as to provide continuous emergency call service for users and improve user experience.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a switching method and a base station of an IP multimedia subsystem emergency call. Background technique [0002] IP Multimedia Core Network Subsystem (IMS for short) is an IP-based network architecture proposed by the 3rd Generation Partnership Project (3GPP for short), which builds an open and flexible business environment, support multimedia applications, and provide users with rich multimedia services. [0003] IMS is an IP-based telecommunications network architecture and has nothing to do with access technology, except for general packet radio service (General Packet Radio Service, referred to as GPRS), wireless local area network (Wireless Local Area Network, referred to as WLAN) and other packet access networks In addition to providing services, it can also provide services for mobile cellular networks such as Global System for Mobile communications (GSM for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/22H04W36/08H04W4/90
Inventor 余志铭李志军
Owner ZTE CORP
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