Modeling and Performance Evaluation of Backoff Misbehaving Nodes in CSMA/CA Networks

11 years 6 months ago

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—Backoff misbehavior, in which a wireless node deliberately manipulates its backoff time, can induce signiﬁcant network problems, such as severe unfairness and denial-of-service. Although great progress has been made towards the design of countermeasures to backoff misbehavior, little attention has been focused on quantifying the gain of backoff misbehaviors. In this paper, to assess the gain that misbehaving nodes can obtain, we deﬁne and study two general classes of backoff misbehavior: continuous misbehavior, which keeps manipulating the backoff time unless it is disabled by countermeasures, and intermittent misbehavior, which tends to evade the detection of countermeasures by performing misbehavior sporadically. Our approach is to introduce a new performance metric, namely order gain, to characterize the performance beneﬁts of misbehaving nodes in comparison to legitimate nodes in CSMA/CA-based wireless networks. We derive the order gains of both continuous and intermittent...

Zhuo Lu, Wenye Wang, Cliff Wang

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