信息与控制Issue(2)：135-141,7.DOI:10.13976/j.cnki.xk.2015.0135
基于混合流拥塞控制的Ad Hoc网络视频传输
Ad Hoc Network Video Transmission Based on Hybrid Flow Congestion Control
摘要
Abstract
An active queue management (AQM)algorithm,based on TCP feedback,will drop UDP packets indis-tinguishably,leading to a dropin UDP video quality.Congestion window-size,drop probability,and the dif-ferential equations of the hybrid flow queue length are deduced based on TCP/UDP transmission characteris-ticsand hybrid flow queuing mechanisms.An Ad Hoc network hybrid flow AQM control model is obtained through the linearization of these equations.A PI-V AQMalgorithm is proposed,which reduces the drop-rate of UDPs.This algorithm dynamically modifies the drop probability for UDP video stream,adjusting to video frame weight and packet length as the transmission quality changes.NS (network simulator)simulations dem-onstrate that this PI-V algorithm′s performance is better than that of the PI and drop-tail algorithms.The to-be-discussed PI-V AQMalgorithm improves video transmission quality by 0.82 dB-2.22 dB,as determined from the peak signal-to-noise ratio.关键词
无线自组网/拥塞控制/主动队列管理/视频流/服务质量Key words
Ad Hoc network/congestion control/active queue management (AQM)/video stream/quality of service分类
信息技术与安全科学引用本文复制引用
陈亮,顾翔..基于混合流拥塞控制的Ad Hoc网络视频传输[J].信息与控制,2015,(2):135-141,7.基金项目
国家自然科学基金资助项目（61402244）；江苏省高校自然科学研究项目（12KJB520015，14KJB510031）；江苏省交通科学研究计划项目（2012Y24－2）；南通市科技计划项目 （）
