Abstract:

Dynamic spectrum allocation is a key technigue of a CR(Cognitive Radio) system. The existing spectrum allocation method focuses on the conflictfree allocation to maximize spectrum utilization, etc. There is no full account of the statistical information of dynamic spectrum, users of different business do not need different bandwidth and realtimenonrealtime needs. The dynamic spectrum allocation for CR based on statistical information and multiqueue has been studied. Compared the exclusive allocation methods with spectrum pool sharing methods, the simulation results show that in the case of centralized control, spectrum pool sharing ensures better fairness and spectrum switching provides higher throughput of the system.

Key words: cognitive radio, dynamic spectrum allocation, spectrum pool, queue, statistical information