移动对等直播流媒体系统的服务质量保证机制研究

J4 ›› 2012, Vol. 34 ›› Issue (10): 11-16.

移动对等直播流媒体系统的服务质量保证机制研究

蒋文斌1，余林琛1, 2，廖光贤1，廖小飞1，王鹏程1，陈珍1

(1.华中科技大学计算机学院服务计算技术与系统教育部重点实验室，湖北武汉 430074；
2.中国地质大学（武汉）计算机学院，湖北武汉 430074)

收稿日期:2012-04-25 修回日期:2012-07-10 出版日期:2012-10-25 发布日期:2012-10-22
基金资助:
国家自然科学基金资助项目（60903173, 60973133）

Research on QoS Mechanism for Mobile P2P Live Streaming System

JIANG Wenbin1,YU Linchen1,2,LIAO Guangxian1,LIAO Xiaofei1,WANG Pengcheng1,CHEN Zhen1

(1.Services Computing Technology and System Laboratory,School of Computer Science and Technology,
Huazhong University of Science and Technology,Wuhan 430074;
2.School of Computer Science,China University of Geosciences,Wuhan 430074,China)

Received:2012-04-25 Revised:2012-07-10 Online:2012-10-25 Published:2012-10-22

摘要/Abstract

摘要：

随着移动网络及移动智能终端的发展和日益普及，移动对等（P2P）网络流媒体方面的研究已成为当前的热点。然而，P2P流媒体的移动化面临两大问题，一是流媒体的差异化服务，二是终端移动过程中的服务质量保证。针对终端的差异性，本文提出了自适应多码率服务的思想，在一个P2P节目流拓扑中，发布多个子流，用户根据自己的网络状况和能力，缓冲全部或者部分子流，并根据网络环境的变化，动态地改变自身缓冲和播放的流，为邻居节点提供差异化的服务；同时提出了一种跨域移动服务质量保证机制，包括数据预缓存、数据暂存等策略。实验证明上述方法能有效提高移动对等直播流媒体系统的服务质量。

关键词: 移动对等网络, 流媒体, 跨域移动, 多码率

Abstract:

With the development of mobile networks and smart mobile terminals, researches on mobile P2P live streaming systems become popular. However, extending the P2P live streaming system faces two obstacles: one is the differentiated services and the other is the Quality of Service (QoS) during the domainacross movement of mobile terminals . In the paper, an adaptive multirate streaming service method is proposed to deal with the differences between mobile terminals and PCs. Multiple substreams of one stream with different rates are distributed in one P2P distribution topology. Clients buffer all or part of substreams according to their situations and abilities. They can adaptively change their buffer and the playing substream according to the variation of the network environment, and provide differentiated services for their neighbors. Meanwhile, a crossdomain mobile QoS mechanism containing data prebuffering and temporarystoring is proposed. Experimental results demonstrate the efficiency of the ways presented for the QoS in the Mobile P2P Live Streaming System.

Key words: mobile P2P network;streaming;crossdomain movement;multirate

蒋文斌1，余林琛1, 2，廖光贤1，廖小飞1，王鹏程1，陈珍1. 移动对等直播流媒体系统的服务质量保证机制研究[J]. J4, 2012, 34(10): 11-16.

JIANG Wenbin1,YU Linchen1,2,LIAO Guangxian1,LIAO Xiaofei1,WANG Pengcheng1,C. Research on QoS Mechanism for Mobile P2P Live Streaming System[J]. J4, 2012, 34(10): 11-16.

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