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Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article MAC Layer Jamming Mitigation Using a Game Augmented by Intervention | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2011 Article ID 453947 14 pages doi 10.1155 2011 453947 Research Article MAC Layer Jamming Mitigation Using a Game Augmented by Intervention Zhichu Lin and Mihaela van der Schaar Department of Electrical Engineering University of California Los Angeles UCLA Los Angeles CA 90095-1594 USA Correspondence should be addressed to Zhichu Lin linzhichu@gmail.com Received 13 April 2010 Revised 21 August 2010 Accepted 11 November 2010 Academic Editor Ashish Pandharipande Copyright 2011 Z. Lin and M. van der Schaar. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. MAC layer jamming is a common attack on wireless networks which is easy to launch by the attacker and which is very effective in disrupting the service provided by the network. Most of the current MAC protocols for wireless networks for example IEEE 802.11 do not provide sufficient protection against MAC layer jamming attacks. In this paper we first use a non-cooperative game model to characterize the interactions among a group of self-interested regular users and a malicious user. It can be shown that the Nash equilibrium of this game is either inefficient or unfair for the regular users. We introduce a policer an intervention user who uses an intervention function to transform the original non-cooperative game into a new non-cooperative game augmented by the intervention function in which the users will adjust to play a Nash equilibrium of the augmented game. By properly designing the intervention function we show that the intervention user can effectively mitigate the jamming attacks from the malicious user and at the same time let the regular users choose more efficient transmission strategies. It is proved that any feasible point in the rate region can be .
