The explosive increase in the volume and variety of Internet traffic has placed a growing emphasis on congestion control and fairness in Internet routers. Approaches to the problem of congestion, such as active queue management schemes like Random Early Detection (RED) use congestion avoidance techniques and are successful with TCP flows. Approaches to the problem of fairness, such as Fair Random Early Drop (FRED), keep per-flow state and punish misbehaved, non-TCP flows. Unfortunately, these punishment mechanisms also result in a significant performance drop for multimedia flows that use flow control. We extend Class-Based Threshold (CRT) [12], and propose a new active queue management mechanism as an extension to RED called Dynamic Class-Based Threshold (D- CBT) to improve multimedia performance on the Internet. Also, as an effort to reduce multimedia jitter, we propose a lightweight packet scheduling called Cut-In Packet Scheduling (ChIPS) as an alternative to FIFO packet scheduling. The performance of our proposed mechanisms is measured, analyzed and compared with other mechanisms (RED and CBT) in terms of throughput, fairness and multimedia jitter through simulation using NS. The study shows that D-CBT improves fairness among different classes of flows and ChIPS improves multimedia jitter without degrading fairness.
Internet流量的数量和种类的爆炸性增长已经越来越重视Internet路由器的拥塞控制和公平性。解决拥塞问题的方法,例如像随机早期检测(RED)这样的活动队列管理方案,都使用拥塞避免技术,并且在TCP流中很成功。解决公平问题的方法,例如公平随机早期丢弃(FRED),保持每流状态并惩罚行为不端的非TCP流。不幸的是,这些惩罚机制还导致使用流控制的多媒体流的性能显着下降。我们扩展了基于类别的阈值(CRT)[12],并提出了一种新的主动队列管理机制作为RED的扩展,称为动态基于类别的阈值(D-CBT),以提高Internet上的多媒体性能。另外,为了减少多媒体抖动,我们提出了一种称为切入数据包调度(ChIPS)的轻量级数据包调度,作为FIFO数据包调度的替代方法。通过使用NS进行仿真,可以在吞吐量,公平性和多媒体抖动方面对我们提出的机制的性能进行测量,分析并与其他机制(RED和CBT)进行比较。研究表明,D-CBT改善了不同类别的流之间的公平性,ChIPS改善了多媒体抖动,而又不降低公平性。 P>
机译:互联网平台上基于多媒体的培训可提高手术性能:一项随机对照试验
机译:提高非英语专业研究生的阅读表现:将元认知阅读策略教学的知识型学习加模型与基于互联网的语言实验室支持相结合
机译:ST利用电缆专业知识来支持下一代多媒体和Internet服务
机译:动态CBT和chIPS路由器支持,可提高Internet上的多媒体性能
机译:在Internet上支持速率自适应多媒体流。
机译:互联网平台上基于多媒体的培训可提高手术性能:一项随机对照试验
机译:动态CBT和ChIps - 路由器支持改善Internet上的多媒体性能