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Statistical Approach to Neighborhood Congestion Control in Ad hoc Wireless Networks

机译：临时无线网络中邻域拥塞控制的统计方法

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摘要

The concept of Active Queue Management (AQM), broadly used in Internet Congestion Control, has been recently introduced to ad hoc wireless networks as a means to mitigate the severe TCP unfairness across flows. In particular, Neighborhood RED (NRED) has been proposed as an extension to the Random Early Detection (RED) mechanism with the goal of ensuring fair bandwidth allocation across flows in the networks. NRED provides improvements but suffers from limitations that can make its broad implementation difficult. This paper describes two fundamental principles governing neighborhood congestion among TCP flows in ad hoc wireless networks which are exploited to develop an improved control mechanism. The first principle indicates that the likelihood of the channel being captured by a node grows exponentially with the disparity between the node's channel utilization and the expected utilization level. The second principle indicates that traditional random packet marking in NRED leads to reduced fairness across flows, pointing to a simple dropping/marking strategy based on the concept of error diffusion where packet marks are spread apart as homogeneously as possible. The power of these fundamental principles is demonstrated in a Fairness Control scheme referred to as Neighborhood Diffusion Early Marking (NDEM) which results in significant fairness improvement over NRED while maintaining high overall network throughput.
机译：最近将广泛用于互联网拥塞控制的活动队列管理（AQM）的概念已被引入临时无线网络，以减轻流动严重的TCP不公平性的方法。特别地，已经提出了邻域红色（NRED）作为随机早期检测（红色）机制的扩展，其目的是确保网络中流动的公平带宽分配。 NRED提供了改进，但遭受了困难的局限性困难。本文介绍了在临时无线网络中的TCP流中的邻域拥塞的两个基本原则，这些原则在临时无线网络中被利用以发展改进的控制机制。第一原理表明，节点被节点捕获的信道的可能性以节点的信道利用率和预期利用率之间的视差呈指数级增长。第二原理表明，NRED中的传统随机分组标记导致跨越流动降低，指向基于误差扩散概念的简单滴定/标记策略，其中分组标记尽可能均匀地分开。这些基本原则的力量在公平控制方案中证明了作为邻域扩散早期标记（NDEM）的公平控制方案，这导致在保持高整体网络吞吐量的同时对NRED的显着公平改善。

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