Method for user terminal dynamic position management by IP multimedia sub-system

Abstract

The invention provides a method used for leading an IP multimedia sub-system to carry out dynamic position management on a user end (UE); the position management of UE is carried out by a dynamic position updating mechanism DLU method; the conversation behaviour of UE is led in a position updating process, namely, corresponding operation on register timer (RT) is added during the conversation process of UE without changing the register process in an IMS, thus reducing the generation frequency of periodic position updating request and the generation times of the periodic position updating request on the basis of extremely little changing quantity. Furthermore, when the UE roams from the home network to the visit network and IOS event or re-register CCRR or PRR event occurs, the method of the invention adopts a two-step position management mechanism TTLM method where home network and visit network are respectively registered and a dynamic position updating mechanism DLU method to carry out the position management on the UE. The method of the invention solves the defects of the prior art better, effectively reduces the load of the HSS and S-CSCF, reduces the transmission quantity of the position updating signals, and improves the utilization ratio of the network resource.

Description

Technical field [0001] The invention relates to a method for dynamic position management of a user terminal by an IP multimedia subsystem, and belongs to the technical field of mobile communication. Background technique [0002] UMTS (Universal Mobile Telecommunications system) is one of the main standards of the third generation of mobile communications. In the UMTS system, the purpose of introducing the IP multimedia subsystem IMS (IP Multimedia subsystem) is to provide voice and video to mobile terminal users. , Data and other multimedia services, unify the core network to an all-IP network structure, and realize the integration of fixed and mobile communication networks. [0003] Location management is one of the key technologies of IMS network. In the IMS network, location management is mainly based on the SIP-based REGISTER request message in the Serving-Call Session Control Function (S-CSCF) server to generate the public user identity of the registered user and the user te...

AI Technical Summary

Problems solved by technology

However, the frequent PRR process is easy to generate a large load pressure on the network, affecting the system performance and capacity of the network

[0005] However, the current registration and re-registration methods make the core network elements in the home network, such as the home subscriber server HSS (Home Subscriber Server) and the S-CSCF server, need to participate in each location registration process and location query process

With the expansion of the user scale and the increase of call traffic, the load on the HSS server and the S-CSCF server will become heavier and heavier, and more location update signaling will also occupy network bandwidth and processing resources. serious adverse effect on business

At the same time, the re-registration process still requires all IMS network elements on the registration path to participate, resulting in low utilization of network resources and inflexible mobility management

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