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一种采用价格机制的无线接入网络拥塞控制策略

A Congestion Control Scheme Based on the Price Mechanism in Wireless Access Networks
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摘要 由于无线接入网络中存在着时延大、吞吐量小、丢包率高等特性,传统的AQM拥塞机制难以应用于有线/无线异构网络。本文通过分析经典的随机指数标记算法(REM)中价格的产生机制,指出了其存在的不足,并通过引入队列缓存比对REM价格使其更能适应无线环境,从而提出了一种新的基于价格的拥塞控制策略—PREM。PREM利用队列缓存比和链路虚拟容量作为拥塞度量指标。最后,通过NS2仿真平台对所提算法进行了验证,与传统的有线拥塞控制经典算法REM算法、PI算法和无线Prox-y-RED算法做了对比实验,最后证实该算法能有效减少丢包现象。 Due to the wireless access networks＇ characteristics of large delay,small throughput and high packet loss rate,the current active queue management（AQM） is not applicable to the wired-cum-wireless network.This paper analyzes the price production mechanism of Random Exponential Marking（REM） and points out its shortcomings.By improving the price with queue-buffer proportion,a new price-based congestion control mechanism（PREM） is proposed.PREM uses queue-buffer proportion and virtual capacity as congestion measures.Finally,the proposed algorithm is validated on the NS2 simulation platform and compared with REM,PI and Proxy-RED.It is proved that PREM can reduce the packet loss effectively.
作者 严黎明 牛玉刚
机构地区 华东理工大学化工过程先进控制和优化技术教育部重点实验室
出处 《计算机工程与科学》 CSCD 北大核心 2011年第12期7-11,共5页 Computer Engineering & Science
基金 国家自然科学基金资助项目(61074041) 上海市重点学科资助项目(B504)
关键词 无线接入网络 拥塞控制 主动队列管理 队列缓存比 虚拟容量 wireless access network congestion control active queue management queue-buffer proportion virtual capacity
分类号 TP393 [自动化与计算机技术—计算机应用技术]
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参考文献10

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计算机工程与科学
2011年 第12期

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