一种面向视频流业务的异构IP网络垂直切换机制  

Vertical Handoff Mechanism in Heterogeneous IP Network for Streaming Video Service

作　　者：王一鸿[1] 周云[1] 王莹[1] 

机构地区：[1]北京邮电大学电信工程学院,北京100876

出　　处：《北京邮电大学学报》2007年第4期50-54,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(60318004;60496312)

摘　　要：为了实现异构IP网络中的视频流业务无缝切换,提出一种快速移动IPv6(FMIPv6)协议框架下的链路层触发垂直切换机制,通过多次触发保证垂直切换的准确性.并且利用视频流业务接收端存在防抖动缓存的特点,在防抖动缓存窗口时间内进行链路层切换.理论分析和仿真结果表明,所提机制能实现低时延垂直切换,满足业务的实时性要求.In response to the request of seamless handoff for streaming video service in heterogeneous IP network, a step-by-step link-layer trigger mechanism is proposed to guarantee the veracity of handoff under fast mobile IPv6 （FMIPv6） protocol structure. Analysis and simulation results show that handoff latency could be reduced by making use of de-jitter buffer window of streaming video traffic to satisfy the near real-time service.

关 键 词：异构IP网络 垂直切换 视频流业务 触发 

分 类 号：TN929.5[电子电信—通信与信息系统]