UMTS网络中一种媒体感知的AQM方法  

Media-aware AQM scheme for UMTS networks

作　　者：彭宇珏[1] 董育宁[1] 黄超[1] 

机构地区：[1]南京邮电大学通信与信息工程学院,南京210003

出　　处：《中国科技论文》2013年第7期663-667,共5页China Sciencepaper

基　　金：国家自然科学基金资助项目(60972038;61271233);高等学校博士学科点专项科研基金资助项目(20103223110001)

摘　　要：由于UMTS(universal mobile telecommunications system)网络中RNC(radio network controller)节点的队列管理方法没有考虑视频数据包的不同重要性等级,导致用户接收的视频质量下降,因此提出了基于媒体感知的主动队列管理(AQM,activequeue management)方法。该方法根据视频数据包的重要性在RNC的RLC(radio link control)层对接收队列进行队列管理。由于不同帧类型的数据包对接收视频质量的贡献不同,通过减少I帧数据包的丢失,可提高视频业务在UMTS网络中的用户体验质量(QoE,quality of experience)。仿真结果显示,该方法能有效提升视频质量,并且随着无线链路质量下降或拥塞程度上升,提升效果更加显著。The queue management scheme of RNC nodes in UMTS networks fails to take into account the different priorities of video data packets, thus resulting in poor video quality at end-users. A media-aware active queue management scheme for UMTS network is proposed in this paper. The scheme manages the receive queue of RLC layer in RNC according to the priorities of packets. Packets of I frame are given higher priority to those of P and B frames. By reducing the loss of I frame packets, the QoE of video service in UMTS networks is improved. Simulation results show that the proposed AQM scheme outperforms the exist- ing schemes in terms of video quality, and the improvement becomes more significant when the wireless channel quality decreases or the congestion level increases.

关 键 词：通信网络技术 主动队列管理 拥塞控制 视频传输 

分 类 号：TN929.53[电子电信—通信与信息系统]