北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2009, Vol. 32 ›› Issue (6): 14-18.doi: 10.13190/jbupt.200906.14.zhangdch

• 论文 • 上一篇    下一篇

MANET中基于局部拓扑的暴露终端并发传输算法

张岱臣;于卫波;杨盘隆;王海   

  1. (1.解放军理工大学 通信工程学院, 南京 210007; 2.南京大学 计算机系, 南京 21009
    3)
  • 收稿日期:2009-03-13 修回日期:1900-01-01 出版日期:2009-12-28 发布日期:2009-12-28
  • 通讯作者: 张岱臣

Algorithm of Exposed Terminals Concurrent Transmission Based on Local Topology in MANET

ZHANG Dai-chen;YU Wei-bo;YANG Pan-long;WANG Hai   

  1. (1.Department of Telecommunications Engineering, People's Liberation Army University of Science and Technology, Nanjing 210007, China; 
    2.Department of Computer Science and Technology, Nanjing University, Nanjing 210093, China)
  • Received:2009-03-13 Revised:1900-01-01 Online:2009-12-28 Published:2009-12-28
  • Contact: ZHANG Dai-chen

摘要:

为了解决移动自组织网络(MANET)中暴露终端导致信道利用率降低的问题,指出暴露终端问题的关键在于局部拓扑,并提出一种基于局部拓扑的并发传输算法. 该算法中,暴露终端节点通过局部拓扑判断并发传输是否冲突,并通过同步算法完成并发传输. 结合IEEE 802.11的DCF协议和跨层设计的思想,开发了local topology based_distributed coordination function(LTB_DCF)协议. 仿真结果表明,相比DCF协议,LTB_DCF在增加较少额外开销的基础上,显著提高了网络的吞吐量.

关键词: 移动自组织网络, 局部拓扑, 暴露终端, 并发传输

Abstract:

To solve the problem of channel resource wasted by exposed terminals in mobile Ad hoc network, exposed terminals is researched. It is pointed out that the key problem is local network topology. Then a concurrent transmission algorithm based on local topology is proposed. In this algorithm, exposed terminals determines whether conflict happens in concurrent transmission through local network topology and complete concurret transmission by synchronization algorithm. Combined with IEEE 802.11 DCF protocol and cross layer mechanisms, a new protocol local topology based distributed coordination function(LTB_DCF) is developed. Simulation results show that compared with DCF, LTB_-DCF protocol improves the network throughput greatly with moderately low overhead.

Key words: mobile Ad hoc network, local topology, exposed terminals, concurrent transmission