北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2012, Vol. 35 ›› Issue (4): 68-71.doi: 10.13190/jbupt.201204.68.liumx

• 论文 • 上一篇    下一篇

Ad Hoc网络中基于传输状态的自适应退避算法

刘洺辛1,于倩2   

  1. 燕山大学 信息科学与工程学院
  • 收稿日期:2011-10-21 修回日期:2012-03-30 出版日期:2012-08-28 发布日期:2012-07-08
  • 通讯作者: 于倩 E-mail:aqi1987@126.com
  • 作者简介:刘洺辛(1976-),男,副教授,硕士生导师,E-mail:liumx@ysu.edu.cn
  • 基金资助:

    河北省自然科学基金项目(F2011203067,F2011103092)

An Adaptive Backoff Algorithm for Ad Hoc Network Based  on Transmission State

LIU Ming-Xin1,YU Qian2   

  1. College of Information Science and Engineering, Yanshan University
  • Received:2011-10-21 Revised:2012-03-30 Online:2012-08-28 Published:2012-07-08

摘要:

提出一种适用于Ad Hoc网络、基于传输状态的自适应退避 (ABTS) 算法. 为了预测信道状态,ABTS算法采用局部竞争节点估计的方法,并且针对不同的信道状态采用退避窗口乘性或线性增加的策略. 鉴于重传多次的数据容易被丢弃,ABTS赋予重传多次的数据高传输优先级,以减少数据丢失. 理论分析和仿真结果表明,ABTS算法能满足Ad Hoc网络多跳特性,并对网络吞吐量、延时和冲突概率有明显地改善,性能优于经典的二进制指数退避(BEB)算法

关键词: Ad Hoc网络, 二进制指数退避, 重传次数, 竞争节点数

Abstract:

An adaptive backoff algorithm based on transmission state (ABTS) for Ad Hoc network is proposed. Used with ABTS, the channel status is sensed by calculating amount of competitive nodes locally and the contention window is adjusted linearly or multiplicatively according to different channel status. To reduce data losses, ABTS algorithm gives frames retransmitted repeatedly higher priority to send. Experiment demonstrates that ABTS algorithm has suitable performances in multi-hop Ad Hoc network, and, compared to Binary Exponential Backoff algorithm, ABTS algorithm has better performances in term of throughput, endtoend delay and collision rate.

Key words: Ad Hoc network, binary exponential backoff, retransmission times, number of contention nodes

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