IMS allows operators to charge multimedia session appropriately: If a user USES videoconference over the 3g cellular network, there is usually a large data transfer that consists of audio and video.
IMS允许运营商对多媒体会话进行适当收费：如果用户通过3 G移动网络使用了视频会议，则通常会产生包含音频和视频的大量数据传输。
Therefore, the Session Initiation Protocol (SIP) is used for building an application-layer Peer-to-Peer (P2P) network in MANET to fulfill multimedia communications.
因此需要利用会话发起协议(SIP)在MANET中构建一个应用层对等网络(P 2 P)，实现多媒体通信。
SIP-based multimedia conference manage system USES SIP as its session connection, provides floor control and is independent of multimedia.
基于SIP协议的多媒体会议管理系统以SIP协议为会话连接的基础，同时提供发言权控制功能，并且与多媒体应用分离。
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