基于MP2P网络的内容分发机制研究

doi:10.3969/j.issn.1000-436x.2013.05.019

Abstract

Abstract:

In consideration of the current MP2P network disturbance from frequent location changes of the mobile nodes,the limited computing power and storage capacity,a flexible strategy of partition management by assigning different functions to nodes according to some standards,regarding a subnet as a unit and using super-nodes to manage subnets were proposed.In order to speed up the data transmission and replacement efficiency,data was processed with partial network coding technology.Additionally,a trans-subnet query algorithm was proposed to link subnets,conduct informa-tion exchange between subnets and resource location.Results of the experiment manifested that this strategy can effi-ciently increase the resource download success rate and hit rate,reduce the average delay,improve the content distribu-tion efficiency of MP2P networks,and simultaneously enhance system robustness.

Key words: MP2P, content distribution, opportunistic routing, node choice, network topology, partial network coding

Guo-yin ZHANG,Lu LI,Jian-guo SUN,Xiang-hui WANG. Research on content distribution mechanism of MP2P networks[J]. Journal on Communications, 2013, 34(5): 168-175.

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硬件环境	软件环境
CPU P4 3.0GB	OverSim2010
内存1GB硬盘160GB	OMNeT++ 4.0Inet2010、Linux Fedora 10

仿真参数	参数值
网络范围	3 000m×3 000m
节点数量	400个
节点V_max	20m/s
节点V_min	0m/s
带宽	250kbit/s
数据块容量	512kbit
TTL	6

Research on content distribution mechanism of MP2P networks

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