Cognitive Software-Radio Enabled Fair Spectrum Access in Open Spectrum
Systems
Collaboration
and Fairness in Opportunistic Spectrum Access Haitao Zheng,
Chunyi Peng IEEE International Conference on Communications(ICC)2005
Korea, May,2005 Also as MSR Technical Report, Feb. 2005
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
significant 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 confirm that user collaboration yields
significant benefits (as much as 50% improvement) in opportunistic spectrum
access.
