Adaptive Scheduling of Collaborative Sensing in Cognitive Radio Networks
نویسندگان
چکیده
In this paper, we aim to discover more spectrum opportunities in limited sensing delay. We construct a MAC-layer sensing framework for fast discovery of spectrum opportunities. Specifically, we employ the sequential probability ratio test and develop a collaborative sensing scheme for multiuser to collaborate during multi-slot. Moreover, we propose a novel adaptive scheduling of collaborative sensing, in which we effectively utilize the resources of secondary users to sense the channels for fast discovery of spectrum opportunities. Subsequently, we maximize the sum of channels available probability to fast discover the spectrum opportunities, and give an effective heuristic solution based on probability table, which has a low complexity. Simulation results show that the proposed scheme could offer good performance with fast discovery of spectrum opportunities.
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