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Detection of selfish manipulation of carrier sensing in 802.11 networks

Pelechrinis, K and Yan, G and Eidenbenz, S and Krishnamurthy, SV (2012) Detection of selfish manipulation of carrier sensing in 802.11 networks. IEEE Transactions on Mobile Computing, 11 (7). 1086 - 1101. ISSN 1536-1233

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Recently, tuning the clear channel assessment (CCA) threshold in conjunction with power control has been considered for improving the performance of WLANs. However, we show that, CCA tuning can be exploited by selfish nodes to obtain an unfair share of the available bandwidth. Specifically, a selfish entity can manipulate the CCA threshold to ignore ongoing transmissions; this increases the probability of accessing the medium and provides the entity a higher, unfair share of the bandwidth. We experiment on our 802.11 testbed to characterize the effects of CCA tuning on both isolated links and in 802.11 WLAN configurations. We focus on AP-client(s) configurations, proposing a novel approach to detect this misbehavior. A misbehaving client is unlikely to recognize low power receptions as legitimate packets; by intelligently sending low power probe messages, an AP can efficiently detect a misbehaving node. Our key contributions are: 1) We are the first to quantify the impact of selfish CCA tuning via extensive experimentation on various 802.11 configurations. 2) We propose a lightweight scheme for detecting selfish nodes that inappropriately increase their CCAs. 3) We extensively evaluate our system on our testbed; its accuracy is 95 percent while the false positive rate is less than 5 percent. © 2012 IEEE.


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Item Type: Article
Status: Published
CreatorsEmailPitt UsernameORCID
Pelechrinis, Kkpele@pitt.eduKPELE0000-0002-6443-3935
Yan, G
Eidenbenz, S
Krishnamurthy, SV
Date: 1 July 2012
Date Type: Publication
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Journal or Publication Title: IEEE Transactions on Mobile Computing
Volume: 11
Number: 7
Page Range: 1086 - 1101
DOI or Unique Handle: 10.1109/tmc.2011.131
Institution: University of Pittsburgh
Schools and Programs: School of Information Sciences > Telecommunications
Refereed: Yes
ISSN: 1536-1233
Date Deposited: 12 Jun 2012 17:52
Last Modified: 31 Jul 2020 14:55


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