P2P流媒体系统的激励机制

J4 ›› 2010, Vol. 45 ›› Issue (3): 29-33.

P2P流媒体系统的激励机制

秦丰林^1,2,江林³,葛连升^2*

1. 山东大学信息科学与工程学院, 山东济南 250100;
2. 山东大学网络与信息中心, 山东济南 250100;
3. 山东山大鸥玛软件有限公司, 山东济南 250100

收稿日期:2009-11-09 出版日期:2010-03-16 发布日期:2010-04-02
通讯作者: 葛连升(1967-),男,博士研究生,副教授,主要研究方向为网络路由与组播算法、网络与系统安全等．Email:lsge@sdu.edu.cn
作者简介:秦丰林(1978-),男,博士研究生,主要研究方向为P2P网络与流媒体技术.Email:qfl@sdu.edu.cn
基金资助:
国家自然科学基金资助项目(60773101, 60872024);山东省自然科学基金资助项目(Y2007G42)

Incentive mechanisms in P2P streaming systems

QIN Feng-lin^1,2, JIANG Lin³, GE Lian-sheng^2*

1. School of Information Science and Engineering, Shandong University, Jinan 250100, Shandong, China;
2. Network and Information Center, Shandong University, Jinan 250100, Shandong, China;
3. Shandong Shanda Ouma Software Co., Ltd, Jinan 250100, Shandong, China

Received:2009-11-09 Online:2010-03-16 Published:2010-04-02

摘要/Abstract

摘要：

目前P2P流媒体技术已经成为Internet上大规模流媒体应用的最流行的实现方案,但其服务质量会受到搭便车问题的影响。本文提出了一种基于内容差分服务的激励机制,该机制根据节点的贡献值和节目的流行度两个因素来计算节点的信誉,节目列表服务器按照节点的信誉值返回相应的节目列表,这样可以实现内容差分服务以避免搭便车问题。仿真结果表明,该激励机制可以有效提高视频播放质量。

关键词: P2P流媒体;搭便车;激励机制;内容差分服务

Abstract:

Recently peer-to-peer (P2P) streaming media technology has been of the most popular solution for large-scale streaming applications over the Internet, but its quality of service (QoS) can be seriously degraded by the free-riding problem. In this paper, a content differentiation service (CDS) based incentive mechanism was proposed, wherein the peer’s reputation was computed with two factors: its contribution level and the popularity of the program, then a differentiated program list was returned to the peer in accordance with its reputation value. Hence, the free-riding problem could be restrained by the implementation of content differentiation service. The simulation results demonstrate that the proposed incentive mechanism can efficiently improve the playback quality in P2P streaming systems.

Key words: P2P streaming; free-riding;　incentive mechanism;　content differentiation service

秦丰林1,2,江林3,葛连升2*. P2P流媒体系统的激励机制[J]. J4, 2010, 45(3): 29-33.

QIN Feng-lin1,2, JIANG Lin3, GE Lian-sheng2*. Incentive mechanisms in P2P streaming systems[J]. J4, 2010, 45(3): 29-33.

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