Opportunistic Spectrum Scheduling for Mobile Cognitive Radio Networks in White Space

Date Added: Jan 2011
Format: PDF

Recent works have shown that the white-space spectrum opened to cognitive radio devices is far less than what the lobbyists claimed. With fast growing number of secondary users, carefully scheduling the spectrum allocation in cognitive radio networks operating on white space becomes vital. However, the frequent ON/OFF activity of Primary Users (PU) and the mobility of the cognitive users make the problem of spectrum scheduling extremely hard. By modeling the PUs activity in an opportunistic manner, this paper studies how to schedule the spectrum assignment for mobile cognitive radio devices. With the mobility information, the authors formally define the related problem as the Maximum Throughput Channel Scheduling problem (MTCS) which seeks a channel assignment schedule for each cognitive radio device such that the maximum expected throughput can be achieved.