J4 ›› 2010, Vol. 37 ›› Issue (5): 789-794+800.doi: 10.3969/j.issn.1001-2400.2010.05.003

• Original Articles • Previous Articles     Next Articles

Game-theoretic approach for concurrent transmission in a single-channel for wireless Ad Hoc networks

LI Xiao-ji1;CHEN Chen1;QIU Hong-bing2;MO Wei2
  

  1. (1. State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an  710071, China;
    2. Information & Comm. College, Guilin Univ. of Electronic Tech., Guilin  541004, China)
  • Received:2010-04-09 Online:2010-10-20 Published:2010-10-11
  • Contact: LI Xiao-ji E-mail:lixiaoji@mail.xidian.edu.cn

Abstract:

Based on the interference-aware SINR (Signal to Interference and Noise Ratio, SINR) model, we formulate a channel access game model, which considers nodes concurrently transmitting in a single-channel in wireless Ad Hoc networks. Then we achieve a Nash Equilibrium Solution (NES) as the transmission threshold, and propose a decentralized concurrent transmission strategy that determines whether to transmit or wait depending on channel conditions for multiple nodes in a single-channel. Simulation results show that the proposed H-MAC protocol achieves about 35%~53% improvement in network throughput over the 802.11a scheme, and that the transmission threshold should be adaptively tuned depending on the number of active nodes, cross-interference ratio, transmission cost and the sensitivity of the radio receiver. We allow multiple nodes to concurrently transmit in a single-channel, which improves network throughput while reducing the energy consumption and communication overhead.

Key words: Ad Hoc networks, game theory, Nash Equilibrium Solution, SINR, concurrent transmission