Playing CSMA/CA game to deter backoff attacks in ad hoc wireless LANs

  • Authors:
  • Jerzy Konorski

  • Affiliations:
  • Gdansk University of Technology, Gdansk, Poland

  • Venue:
  • ADHOC-NOW'05 Proceedings of the 4th international conference on Ad-Hoc, Mobile, and Wireless Networks
  • Year:
  • 2005

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Abstract

The IEEE 802.11 MAC protocol is vulnerable to selfish backoff attacks exploiting the constituent CSMA/CA mechanism. Administrative prevention of such attacks fails in wireless ad-hoc LANs which cannot mandate stations’ behavior. We take a game-theoretic approach whereby stations are allowed to maximize their payoffs (success rates). Using a fairly accurate performance model we show that a noncooperative CSMA/CA game then arises with a payoff structure characteristic of a Prisoners’ Dilemma. For a repeated CSMA/CA game, a novel SPELL strategy is proposed. If the stations are rational players and wish to maximize a long-term utility, SPELL deters a single attacker by providing a disincentive to deviate from SPELL.