Method for realizing emergency call, and system and user equipment thereof

Abstract

The invention discloses a method for realizing an emergency call. The method comprises the steps as follows: user equipment uses a visited network IP address to initiate an emergency call request; the emergency call request is transferred to a public data network gateway of the visited network; the public data network gateway triggers the process for discovering a proxy-call session control function (P-CSCF) at the visited network; and the discovered P-CSCF processes the emergency call request. In addition, the invention also discloses a system for realizing the emergency call and the user equipment thereof. The technical proposal can realize the emergency call processing within a short time, and the invention does not require arranging an interface and is easy for realizing.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a method and system for implementing an emergency call, and a user equipment. Background technique [0002] IP Multimedia Subsystem (IP Multimedia Subsystem, referred to as IMS) is the standard of the next generation network defined by the third generation partnership organization (3rd Generation Partnership Project, referred to as 3GPP). Initiation Protocol, referred to as SIP) system, in the SIP system, communication has nothing to do with access, and can have a variety of separation of media service control functions and bearer capabilities (for example, separation of calls and sessions, separation of applications and services, separation of business and network Separation), and multiple capabilities such as mobile network and Internet service integration, the proposal of IMS conforms to the development trend of communication network integration. [0003] In the IMS system,...

AI Technical Summary

Problems solved by technology

[0019] From the above steps, it can be seen that there are the following problems in related technologies: First, the timeliness of the above method is low. For emergency calls initiated on the visited network, they need to be forwarded to the user's home network, and then rely on the home network and the visited network. An interface for emergency call forwarding between networks, which forwards emergency calls back to the visited network, which is not very time-sensitive

Secondly, to be able to forward emergency call services between the visited network and the home network, it is necessary to configure an interface for handling emergency calls between the two networks. If there is no such interface between the networks, emergency call forwarding will not be successful.

Moreover, according to the existing network deployment, the setting of this interface is very difficult, and the requirements are very high, which will easily make the network deployment more complicated

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