Woongsoo Na
  Jeongseok Yu
  Along with significant demands on wireless resources, cognitive radio (CR) technology has recently received much attention. In cognitive radio networks (CRN), secondary (or unlicensed) users can periodically search and identify available channels in their spectrum of operation. Based on sensing results, secondary users (SUs) dynamically tune their transceivers to an identified channel to communicate among themselves without disturbing the primary (or licensed) users (PUs). When a SU detects a PU, the SU must release the channel to the PU and continue to use another available channels, if any. This is due to the basic principle that the PUs have the exclusive right to occupy the channel.
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UHF 대역 Cognitive Radio MAC 구조 설계 (A Design of Cognitive Radio MAC), Samsung, 2007.05.01~2008.02 [Progress Report] [Final Report]
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박래혁, 최원석, 조성래, 김기홍, 황성호, "Cognitive Radio 시스템에서의 2차 사용자 채널 할당 기법(Channel Allocation Scheme for Secondary User in Cognitive Radio Systems)," 한국통신학회 하계학술발표대회, 제주, July 2008. [PDF]
박래혁, 조성래, Cognitive Radio 기반 중앙집중 방식 수락제어 알고리즘 성능평가, 국내프로그램 2008-01-121-006412, 2008. 11. 25. [프로그램등록증]

박래혁, 조성래, Cognitive Radio 시스템에서의 2차 사용자 채널 할당 기법 성능분석, 국내프로그램 2008-01-121-006411, 2008. 11. 25. [프로그램등록증]