The Open Spectrum approach to spectrum access can achieve near-optimal spectrum utilization by letting users sense and utilize available spectrum opportunistically. However, naive spectrum assignment can lead to signi\ufb01cant interference. We propose a network controlled spectrum access scheme where users behave collaboratively to optimize spectrum allocation for the entire network. We develop a graph-theoretical model to characterize the spectrum access problem under a number of different optimization functions, and devise rules for users to utilize available spectrum while avoiding interference with its neighbors. Experimental results con\ufb01rm that user collaboration yields signi\ufb01cant bene\ufb01ts (as much as 50% improvement) in opportunistic spectrum access.<\/p>\n","protected":false},"excerpt":{"rendered":"
The Open Spectrum approach to spectrum access can achieve near-optimal spectrum utilization by letting users sense and utilize available spectrum opportunistically. However, naive spectrum assignment can lead to signi\ufb01cant interference. We propose a network controlled spectrum access scheme where users behave collaboratively to optimize spectrum allocation for the entire network. 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