Method for reducing system signalling interactive process for multimedia subsystem

Abstract

The invention advances a signaling interacting method in IMS, able to reduce signaling interacting number and improve system stability. In the process of making signaling interaction between network element, SLF and HSS, the method comprises the steps of: a network element receives a message containing user ID; according to the user ID, it inquires HSS information corresponding to the user ID in its buffer memory; and it builds signaling interaction with attribute HSS determined by the HSS information. Thus, by addition of buffer memory to network element, the method omits the interacting process that I-CSCF inquires of SLF about user attribute HSS. Thus, the method reduces signaling interacting number and besides, improves system stability.

Description

Technical field [0001] The invention relates to IMS (IP Multimedia Subsystem, IP multimedia sub-domain), and in particular to a method for simplifying multimedia sub-domain and reducing system signaling interaction process. Background technique [0002] IMS is a sub-system for multimedia services supporting IP defined by the 3GPP (3rd Generation Partnership Project) standard organization. Compared with other communication core networks such as PSTN, GSM, CDMA and 3G CS domain, its salient features include the use of scalable open protocols, independence of communication and access methods, classification of control functions and bearer functions, and call ) And session (Session) separation, calling user session control and called user session control separation, business network and basic network separation and other technologies. Because of these technical advantages, IMS can support fixed and mobile terminals at the same time, while carrying traditional voice services, data and...

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Problems solved by technology

[0012] It can be seen from the above example that if the session / call in the IMS domain needs to access the user's home HSS during the processing of the user's home network, the I-CSCF / S-CSCF / AS must access the centrally set SLF database to query and obtain the home HSS. In this case, there will be two problems: 1) The process of querying SLF increases the number of signaling interactions in the entire system, which also increases the system overhead; 2) SLF is an important single point of the home network, and it may be due to the Faults lead to instability of the entire system

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