Spectrum allocation algorithm based on spectrum aggregation and user demands in cognitive radio
Hu Qin · Journal of Chongqing University of Posts and Telecommunications · 2014
In the system of cognitive radio,spectrum allocation is the key of improving the utilization of spectrum. In order to take full advantage of discontinuous spectrum after the spectrum sensing,a spectrum allocation algorithm based on spectrum aggregation and user demands was proposed. The algorithm was depend on the group coloring model,comprehensive considered the diversity of available spectrum,the aggregation of discontinuous spectrum and the max span of spectrum aggregation,then the algorithm were designed with the spectrum aggregation technology and the current demand information of cognitive users. The algorithm proposed three different label rules and their system benefits were compared through the simulation result. The results also proved that the proposed algorithm could balance fairness among cognitive users and achieve better allocation rate and throughput when the spectrum resources were tense and cognitive user demand was large.