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Performance Evaluation of a Dynamic Medium Access Control Scheme for Mobile Ad-Hoc Networks

机译：移动自组织网络动态媒体访问控制方案的性能评估

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摘要

Recently there have been considerable interests focusing on the enhancement of Mobile Ad-hoc NET works (MANETs) which are a collection of wireless mobile nodes forming a temporary network without using any centralized access point, infrastructure, or centralized administration. The Distributed Coordination Function (DCF) of IEEE 802.11 Medium Access Control (MAC) protocol has been widely employed in MANETs to manage the shared wireless medium. In DCF, the size of contention window is doubled upon a collision regardless of the network loads. This paper presents a dynamic MAC scheme to improve the performance of MANETs, which applies a threshold of the collision rate to switch between two different functions for increasing the size of contention window and two different mechanisms of resting the size of the contention window based on the status of network loads. The performance of this scheme is investigated and compared to the original DCF using the network simulator NS-2. Moreover, the Random WayPoint (RWP) mobility model is adopted to investigate the effects of mobility on network performance. The performance results reveal that the dynamic scheme is able to achieve the higher throughput and energy efficiency as well as lower end-to-end delay than the original DCF with and without mobility.
机译：最近，人们对增强移动自组网作品（MANET）产生了极大的兴趣，移动自组织网作品是形成临时网络而无需使用任何集中式访问点，基础结构或集中式管理的无线移动节点的集合。 IEEE 802.11介质访问控制（MAC）协议的分布式协调功能（DCF）已在MANET中广泛采用，以管理共享无线介质。在DCF中，无论网络负载如何，争用窗口的大小在发生冲突时都会加倍。本文提出了一种动态MAC方案来提高MANET的性能，该方案应用冲突率阈值在两个不同的函数之间进行切换以增加争用窗口的大小，并基于这两种机制来保持争用窗口的大小。网络负载的状态。使用网络模拟器NS-2，研究了该方案的性能并将其与原始DCF进行了比较。此外，采用随机WayPoint（RWP）移动性模型来研究移动性对网络性能的影响。性能结果表明，与具有和不具有移动性的原始DCF相比，该动态方案能够实现更高的吞吐量和能效以及更低的端到端延迟。

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  • 来源
  • 会议地点 Barcelona(ES)
  • 作者

    Mamun I. Abu-Tair; Geyong Min; Qiang Ni; Hong Liu;

  • 作者单位

    Department of Computing, School of Informatics, University of Bradford, Bradford, U.K.;

    Department of Computing, School of Informatics, University of Bradford, Bradford, U.K.;

    Electronic Computer Engineering Division, School of Engineering Design, Brunei University, U.K.;

    Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 计算机网络;
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