Synchronized multimedia multicast on mobile IP networks
Synchronized multimedia multicast on mobile IP networks
复制标题
移动IP网络上的同步多媒体组播
DOI：
10.1109/icc.2003.1204438
复制
发表时间：
2003
期刊：
影响因子：
--
通讯作者：
Kuo
中科院分区：
文献类型：
--
作者：
Ing;Kuo
使用IP组播技术，源发送方可以高效地将一个多媒体流副本同时发送给多个移动主机。但是，由于移动主机可以漫游到任何无线小区，同一源发出的多媒体流可能沿着不同的路径到达不同的移动主机，这就引入了不同的端到端延迟。一旦移动主机切换到具有不同端到端延迟的另一个无线蜂窝，它将无法接收到用于连续播放的正确流媒体数据。本文提出了同步多媒体组播（SMM）方案，以实现传统家庭订阅（HS）和远程订阅（RS）方案所不能满足的两个最重要的特性。首先，SMM方案支持移动IP网络上的同步多媒体组播，在移动主机切换时实现连续媒体流的无缝回放。此外，结合MPEG-4标准中的细粒度可扩展性（FGS）方法，SMM方案在切换后的短时间内实现了无数次切换，但代价是视频质量下降。
With the IP multicast technique, the source sender can efficiently transmit only one copy of the multimedia stream to multiple mobile hosts simultaneously. However, because the mobile host can roam to any wireless cell, the multimedia stream issued by the same source may follow different paths to different mobile hosts, which introduces different end-to-end delays. As soon as the mobile host handoffs to another wireless cell with a different end-to-end delay, it will not receive the correct streaming multimedia data for continuous playback. In this paper, we propose the synchronised multimedia multicast (SMM) scheme to achieve the two most important characteristics that the traditional home subscription (HS) and remote subscription (RS) schemes cannot support. First, SMM scheme supports synchronized multimedia multicast on mobile IP networks and achieves seamless playback of continuous media stream when the mobile host handoffs. Further, combined with the fine granularity scalability (FGS) approach in the MPEG-4 standard, the SMM scheme achieves unlimited numbers of handoff only at the cost of degraded video quality for a short period after handoff.