感知无线电中频谱共享技术的研究

ognitive radio technology is developed to utilize the unused authorized spectrum and increase the efficiency of spectrum by dynamic spectrum access, Spectrum sharing technology is a very important research direction in cognitive radio. a lot of spectrum sharing methods simply improve the network throughput ,it my result in a severe bias on spectrum allocation. it is very important to research the fair spectrum sharing technology. In this paper, we study joint spectrum allocation and scheduling problems in cognitive radio wireless networks with the objectives of achieving fair spectrum sharing. This paper proposes the spectrum allocation algorithm for the protocol model, The scheduling algorithms are used to schedule the transmission modes obtained by the spectrum allocation algorithms.Based on the proposed algorithm,three scheduling algorithms are compared in this paper through simulation. The results show that, the algorithms considering fairness perform less throughput,the average throughput is about 96% of the maximum achievable throughput,but the traffic demands of all the users can be satisfacted,it can achieve a good tradeoff between throughput and fairness.