| Summary: | 碩士 === 國立臺灣大學 === 電信工程學研究所 === 97 === Cognitive radio (CR) technology is considered as an effective solution to enhance overall spectrum efficiency, while primary radio network (PRN) typically having
relatively low spectrum utilization. However, to realize CR concept, it is essential to provide enough incentives to PRN and extra profit to the service provider such that
cognitive radio mobile stations (CR-MSs) may utilize PRN spectrum bands accordingly, which provides a new challenge for spectrum management. In this paper, we consider a
PRN consisting of a primary system base station (PS-BS) and multiple primary system mobile stations (PS-MSs), and we therefore construct a cognitive radio network (CRN) consisting of a PRN with multiple CR-MSs. We propose a spectrum manage policy framework by Vickrey auction such that CR-MSs can compete to utilize the PRN spectrum bands available for opportunistic transmission of CR-MSs. PRN users are granted incentives at a discounting factor to access spectrum bands and being compensated for possible operating interference from CR-MSs, while the interference is constrained under a tolerance level without losing satisfaction for PS-MSs. Once CR-MSs are granted the spectrum bands, they can utilize the spectrum bands for certain duration without any spectrum handoff. Consequently, in addition to incentives to the PRN, the overall spectrum utilization, the profit of the service provider, and the opportunity of accessing spectrum for the CR-MSs are enhanced to achieve co-win situation for every involved party in cognitive radio networks.
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