Terminal and method for realizing seamless switching among different communication network

Abstract

The present invention provides a terminal and method that realizes the seamlessly switch between the IMS network domain and the CS domain network, It could conducted real-time detection of the network condition and switch the communication network when the switching strategy is satisfied. So the continuous conversation during the switch could be ensured. It would also provide technical support to IMS domain network that orients at a variety of access technologies and uses SIP as a session control protocol, and provide the effective technical guarantee for the further development of FMC.

Description

technical field [0001] The invention relates to communication network switching technology, in particular to a terminal and a method for realizing seamless switching between different communication networks. Background technique [0002] With the development of communication technology, it has become the direction of development to realize the integration of communication services and communication networks through various common protocols. The purpose is to make communication more convenient for users. [0003] The IP Multimedia Subsystem (IMS) for multiple access technologies, IP-based multimedia service and session control core network, has both the convergence point "IP" for technology convergence and the convergence point "Multimedia" for service convergence, and is suitable for Fixed-Mobile Convergence (FMC), thus becoming the core of next-generation convergence technology. IMS is a public platform that supports various converged services defined and developed by mult...

AI Technical Summary

Problems solved by technology

The above UMA scheme has brought a large amount of data traffic to the GSM / GPRS core network, causing the main entities of the existing GSM / GPRS network, such as the mobile switching center server (MSC), serving GPRS support node (SGSN) and gateway GPRS support node ( GGSN), etc., must be expanded or even replaced to meet additional requirements, which offsets the advantages of the UMA solution to the existing GSM / GPRS network with less changes, resulting in a higher cost than the IMS solution in the case of large-scale user deployment out a lot

[0009] 3. UMA has less consideration for the needs of enterprise users

Enterprises and public WiFi hotspots usually use wireless LAN or metropolitan area network gateways and AAA models for access, which is quite different from UMA access methods, so users cannot use local wireless access nodes (APs) for access

Moreover, although the UMA solution provides switching between GSM / GPRS and WiFi, it does not support switching between multiple APs, which is a serious problem for large-scale enterprise applications.

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