[摘要] 文章通过对全球IP多媒体子系统(IMS)终端服务质量(QoS)研究情况的调查、分析,提出了IMS终端QoS控制的实现方法。文章基于区分服务的QoS策略,设计了一套基于终端设备的QoS控制机制,该机制按服务优先级进行流量调节,对包进行缓存和调度输出实现多媒体通信。
[关键词] IP多媒体子系统;服务质量;预置条件;会话启动协议;智能终端
[Abstract] In this paper, we analyze QoS in IP multimedia subsystem (IMS) terminals and discuss methods for controlling QoS. We propose a QoS control mechanism in the terminal. The mechanism controls flow according to service priority and uses packet caching and output scheduling for multimedia communication.
[Keywords] IP multimedia subsystem; QoS; precondition; session initiation protocol; intelligent terminals