基于联合信道与缓冲区的QoS控制策略  

QoS control strategy based on joint channel and buffer

作　　者：龙昭华[1] 罗浪[1] 龚俊[1] 

机构地区：[1]重庆邮电大学计算机科学与技术学院,重庆400065

出　　处：《计算机工程与设计》2016年第7期1714-1719,共6页Computer Engineering and Design

摘　　要：分析通用数据传输服务质量(quality of service,QoS)技术,探讨实时传输及实时传输控制协议(real-time transport protocol/real-time transport control protocol,RTP/RTCP)、H.264数据预测编码等相关技术在无线传输过程中的作用,提出一种智能丢包和速率控制的联合策略。在分析视频数据帧结构相似特性的基础上,建立数据差错传输模型,引入一种数据帧重要性评估方案,通过对发送数据包的标记,利用RTCP反馈机制,在不同的带宽和缓冲区阈值实现动态智能丢包或改变速率。将其应用于自主研发的多平台无线投影装置,测试结果表明,添加QoS保障后,无线投影仪具有实时、高清的效果,该联合信道和缓冲区的QoS控制策略是有效的。The common data transmission quality of service （quality of service,QoS）technology was analyzed,and the effect of the real-time transmission and real-time transmission control protocol （real-time transport protocol/real-time transport control protocol,RTP/RTCP）,H.264 data predictive coding and other related technologies in the wireless transmission process were explored,and a joint strategy of intelligent packet loss rate control was proposed.A data error transfer model was established based on analyzing video data frame structure similar properties,and a data frame importance assessment program was intro-duced in which the dynamic intelligent packet loss or rate of change was implemented in different bandwidths and buffers thresholds by sending packets of markers and using RTCP feedback mechanism.To test its effectiveness,the strategy was applied to the self-organizing multi-platform wireless projection apparatus.Experimental results show that wireless projector is characterized by real-time and high-definition effect after adding QoS guarantee,indicating that the control strategy is effective.

关 键 词：服务质量 RTP/RTCP协议 智能丢帧 速率控制 缓冲区 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]