计算机应用

• 网络与通信(Network and communications) • 上一篇    下一篇

Ad Hoc网络中基于DCF的MAC协议能量效率分析

黄景廉   

  1. 西北民族大学
  • 收稿日期:2008-06-16 修回日期:2008-07-23 发布日期:2008-12-01 出版日期:2008-12-01
  • 通讯作者: 黄景廉

Energy efficiency analysis of DCF-based MAC protocol in Ad Hoc network

HUANG Jing-Lian   

  • Received:2008-06-16 Revised:2008-07-23 Online:2008-12-01 Published:2008-12-01
  • Contact: HUANG Jing-Lian

摘要: 素的前提下,提出了一种对分布式协调功能DCF的基本访问控制、RTS/CTS访问控制机制以及混合访问控制机制的能量效率进行分析的有效方法,并研究了网络中终端数量、平均数据包长度、最大后退次数以及初始竞争窗口大小对能量效率的影响。仿真结果验证了该方法的正确性和有效性。

关键词: 能量效率, 分布式协调功能, 媒体接入控制, Ad Hoc网络

Abstract: IEEE 802.11 Medium Access Control (MAC) protocol provides a competition-based distributed channel access mechanism for mobile stations to share the wireless medium in wireless Ad Hoc networks. Under the precondition of variable packet length, an energy analytical method was proposed, which calculated the energy efficiency of the basic, the RTS/CTS (Request To Send/Clear To Send) and the hybrid access mechanisms of the IEEE 802.11 Distributed Coordination Function (DCF). Furthermore, the effects of the network size, the average packet length, maximum backoff time, and the initial contention window on the energy efficiency of IEEE 802.11 DCF were explored in detail. Correctness and effectiveness of the proposed analytical method were verified through detailed simulation results.

Key words: energy efficiency, Distributed Coordination Function (DCF), Medium Access Control (MAC), Ad Hoc Networks