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Cognitive Radio MAC Protocol for Hidden Incumbent System Detection  

Kim, Hyun-Ju (인하대학교 정보통신대학원 멀티미디어통신망연구실)
Jo, Kyoung-Jin (인하대학교 정보통신대학원 멀티미디어통신망연구실)
Hyon, Tae-In (Virginia Polytechnic & State University 전기공학과)
Yoo, Sang-Jo (인하대학교 정보통신대학원 멀티미디어통신망연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.31, no.12B, 2006 , pp. 1058-1067 More about this Journal
Abstract
In this paper, we propose a inband/outband broadcast method for hidden incumbent system detection of medium access control layer for wireless regional area network systems using cognitive radio technology. Through some extra channels that are not currently used, a short message is broadcasted. The message allows CPE detecting an appearance of incumbent system to send sensing report to CR BS. For the hidden incumbent system report message, the BS needs a process or method for allocation of upstream resource to CPEs. And transmitting multiple out-band signals has a possibility to collide with out-band signals of other co-located WRAN BSs. To avoid out-band signal collision, BSs randomly select it out-band signal broadcasting time within the pre-defined explicit out-band signaling, period. And fractional Bandwidth Usage allows WRAN BSs to efficiently use bandwidth.
Keywords
Cognitive radio technology; Hidden incumbent system detection; Fractional bandwidth usage;
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