BlueTorrent-ED:一种采用无比率编码改进的蓝牙移动P2P网络协议  

BlueTorrent-ED:a Rateless Coding-used Bluetooth Protocol in Mobile Peer-to-Peer Networks

作　　者：叶晖[1] 陈志刚[1] 夏卓群[1] 曾锋[1] 

机构地区：[1]中南大学信息科学与工程学院,湖南长沙410083

出　　处：《小型微型计算机系统》2009年第5期830-834,共5页Journal of Chinese Computer Systems

基　　金：国家自然科学基金项目(60573127)资助;国家自然科学基金项目(60773012)资助

摘　　要：移动P2P网络目前得到了研究者的广泛关注.同时蓝牙智能终端的普及和移动应用环境的逐渐成熟使得基于蓝牙实现的移动P2P网络具有较高的实际应用意义与广阔的发展前景.然而由于有限的带宽,较短的通讯范围,移动性等特点给蓝牙移动P2P网络带来了新的挑战.本文在蓝牙通讯参数选择,数据分发策略上展开研究,提出一种基于BlueTorrent协议改进的协议:BlueTorrent-ED.该协议通过控制蓝牙随机退避时间精度来降低网络连接建立延迟,并采用On-Line编码算法进行数据分发优化以提高网络可靠性,实验仿真的结果表明BlueTorrent-ED能有效地降低网络拓扑变化,丢包率带来的影响,同时提高网络吞吐量.Now, Mobile Peer-to-Peer（P2P） network becomes extensive focus of researchers. The popularity of Bluetooth intelligent terminals and the maturity of mobile application environment bring practical significance and bright prospect for mobile Bluetooth P2P networks. However, there are new challenges caused by the limit bandwidth, short communication range in mobile Bltietooth P2P networks. In this paper, we investigate the ways of selection of Bluetooth communicating parameter and data dissemination strategy. A new Bluetooth protocol is proposed. It is improved upon Bluetorrent, referred as Bluetorrent-ED. Bluetorrent-ED controls Blue- tooth back off time＇s granularity to reduce network connection delay. Furthermore, To improve network＇s reliability, On-Line coding algorithm is used for optimization in data dissemination. The results of simulation show that Bluetorrent-ED can reduce the impact of network topology changing and the ratio of packet loss. Furthermore, it can improve network throughput.

关 键 词：移动P2P网络 蓝牙 On—Line编码 数据分发 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]