METHOD, SYSTEM AND APPARATUS FOR CARRYING OUT COMMUNICATION CALLING AND RELEASING

摘要

A method for carrying out communication calling includes receiving the calling message from a user terminal; controlling the establishment of the media plane association between the evolution media gateway EMGW and the user terminal according to the calling message; controlling the establishment of the bearer between the user terminal and the packet switching domain gateway, where the bearer transmitting the analog circuit domain service data of the user terminal in the packet switching domain. And a releasing method, a user device, a packet switching control plane entity, a control entity at network side and a system for carrying out communication calling. When the terminal accesses the PS domain, it may call the CS domain in the PS domain or the opposite terminal in the fixed network, which enables the UMTS evolution network to be backward compatible with the current CS domain.