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http://dx.doi.org/10.7840/KICS.2012.37A.4.205

Measurement-based Channel Hopping Scheme against Jamming Attacks in IEEE 802.11 Wireless Networks  

Jeong, Seung-Myeong (아주대학교 정보통신대학원)
Jeung, Jae-Min (아주대학교 NCW 학과)
Lim, Jae-Sung (아주대학교 정보통신전문대학원 정보통신공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.37, no.4A, 2012 , pp. 205-213 More about this Journal
Abstract
In this paper, we propose a new channel hopping scheme based on IEEE 802.11h as a good countermeasure against jamming attacks in IEEE 802.11 wireless networks. 802.11h Dynamic Frequency Selection (DFS) is a mechanism which enables hopping to a best channel with full channel measurement, not a randomly chosen channel, when the current link quality degradation occurs due to interferers such as military radars. However, under jammer attacks, this needs a time for full channel measurement before a new channel hopping and due to link disconnection during the time network performance degradation is inevitable. In contrast, our proposed schemes make an immediate response right after a jammer detection since every device is aware of next hopping channel in advance. To do this, a next hopping channel is announced by Beacon frames and the channel is selected by full channel measurement within Beacon intervals. Simulation results show that proposed scheme minimizes throughput degradation and keeps the advantages of DFS.
Keywords
WLAN; IEEE 802.11h; DFS; Channel Hopping; Jamming Attacks;
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