(In recent years, with the rapid development of mobile communications, 3G mobile services are about to open in China. Facing higher requirements of 3G services on managing multiple media such as pictures, music and video streams, IMS is considered to be the core technology of the next generation network, and also an important method to solve the integration of mobile and fixed networks and introduce differentiated services such as voice, data and video. This document includes the following annexes:)
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