无线环境下具有实时约束的主动队列管理机制

发布时间：2018-02-23 22:09

本文关键词： 无线网络服务质量主动队列管理实时约束　出处：《电子与信息学报》2013年05期 　论文类型：期刊论文

【摘要】：实时流业务的超期丢包率是衡量无线网络传输过程服务质量的常用参数,但是该参数并不能反映出具有不同重要度的数据包对视频质量的影响。该文将实时传输流的数据包重要度与超期丢包率结合,提出加权超期丢包率的概念,更加准确地描述丢包与视频质量的关系,在无线环境下提出基于数据包不同重要度的适用于实时约束流的主动队列管理算法,通过主动丢弃数据包以最小化服务过程中实时流的加权超期丢包率。仿真结果表明,相比于传统的队列管理算法和实时视频流滤波器算法,该超期数据包主动丢弃算法能够有效降低加权超期丢包率,提供更好的服务质量,提高大约0.5-1.5 dB的峰值信噪比(PSNR)增益。
[Abstract]:The out-of-date packet loss rate of real-time streaming services is a commonly used parameter to measure the quality of service in wireless network transmission process. However, this parameter can not reflect the influence of packets with different importance on video quality. In this paper, the concept of weighted out-of-date packet loss rate is proposed by combining the packet importance of real-time transport stream with the out-of-date packet loss rate. The relationship between packet loss and video quality is described more accurately. An active queue management algorithm for real-time constrained flow is proposed based on different importance of packet in wireless environment. In order to minimize the weighted overrun packet loss rate of real-time stream in the process of service, the simulation results show that compared with the traditional queue management algorithm and the real-time video stream filter algorithm, the proposed algorithm is more efficient than the traditional queue management algorithm and the real-time video stream filter algorithm. This algorithm can effectively reduce the weighted overrun packet loss rate, provide better quality of service, and improve the PSNR gain of about 0.5-1.5 dB peak SNR.
【作者单位】：中国科学技术大学电子工程与信息科学系;
【基金】：国家自然科学基金(61170231)资助课题
【分类号】：TP393.06

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