The Realization Of Soft Handover Function Between Different Nets In Mgcs

In this paper, the problem to be solved by Japan Telecom’s3G network in the IP and ATM, the existence of mobile users in the communications network from ATM to IP mobile networks and vice versa, the transfer mode of the two networks and transport protocol is not compatible, The issue of communication interruption occurred. How to achieve inter-network communication channel soft handoff (Soft HandOver) is the objective of exploring the topic. To this end, we will not only channel ATM switching network principle applies to the CS-IP network, that is, through ALCAP (based on the STM transmission access link control application protocol) and IP-ALCAP (access based on IP transmission link application layer control protocol) protocol information packet two CS-IP network in the conversion of voice transmission and control, the completion of a new communication channel link signaling to establish and slashing business processes to achieve. Development in our target media gateway control server (MGCS), it is essential to the completion of ALCAP and IP-ALCAP agreement to receive information packets to send, signal recognition, conversion information, call state control, sound transmission control, routing, channel resources management functions.The paper first discusses the research background and the development of IP-based status quo, to point out the content and objectives of the study, followed by the analysis of the existing ATM network function H.O. to switch channels on the basis of the proposed inter-CS-IP network channel soft H.O. switching function MGCS external demand and domestic demand. MGCS system based on software architecture, design and function for H.O. module division, and detailed communication control module, signaling the control module and control module scenes scenario design and implementation in order to gradually resolve the entire function of the realization of the key issues. After the final assessment of a series of rigorous testing to verify the inter-network H.O. channel to achieve seamless switching function.The server has been well tested to make sure that the function is well verified. In Japan it has good user feedback; the market has an important significance.