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학술대회 Performance Evaluation of a CR-Based WRAN System using Spectrum Utilization Efficiency
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강현덕, 홍헌진, 김창주
International Conference on Wireless Communications, Networking and Mobile Computing (WiCOM) 2008, pp.1-4
08MR4500, 스펙트럼 공학 및 밀리미터파대 전파자원 이용기술개발, 김창주
A cognitive radio system is one of promising solutions that can relieve the spectrum shortage problem by using spectrum overlay sharing. The performance of a cognitive radio system can be evaluated by the spectral utilization efficiency. Considering net system coverage, we propose area efficiency in order to measure the spectrum utilization efficiency of a CRbased wireless regional area network (WRAN) system over TV bands. Based on a coexistence scenario between WRAN and DTV systems, we evaluate area efficiency and compare it with the conventional ones such as spectral/coverage efficiency. From simulation results it is observed that area efficiency Is more useful than spectral/coverage efficiency under spectrum sharing environment such as the number of available frequency bands and the available amount of given geographical area. © 2008 IEEE.
KSP 제안 키워드
Cognitive Radio System, Coverage efficiency, Performance evaluation, Spectrum utilization, TV Band, Utilization efficiency, Wireless Regional Area Network, area efficiency, coexistence scenario, cognitive radio(CR), frequency band