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http://dx.doi.org/10.7840/KICS.2012.37B.3.189

The Coexistence Solution using Transmission Schedule and User's Position Information in Cognitive Radio Networks  

Lee, Kyu-Ho (인하대학교 정보통신대학원)
Choi, Jae-Kark (인하대학교 정보통신대학원)
Yoo, Sang-Jo (인하대학교 정보통신대학원)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.37, no.3B, 2012 , pp. 189-203 More about this Journal
Abstract
In cognitive radio networks, a secondary user opportunistically accesses an empty channel based on periodic sensing results for avoiding possible interference to the primary users. However, local sensing does not guarantee the full protection of the primary users because hidden primary receivers may exist within the interference range of the secondary transmitter. To protect primary systems and simultaneously to maximize utilization of the secondary users, we need to derive carefully designed coexistence solutions for various network scenarios. In this paper, we propose coexistence conditions without any harmful interference in accordance with the uplink/downlink schedule and user position. We have classified the coexistence conditions into four different scenario cases depending on the provided information to the secondary network basestations. Computer simulation results demonstrated that the proposed method can be applied to the real cognitive radio system to improve the communication probability of CR devices.
Keywords
Coexistence; Cognitive Radio; Geo-location database; Uplink/Downlink; Interference-free;
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