On Energy-optimal Cooperation Strategy in Cognitive Radio Networks
Taking into account the overall energy consumption during consecutive processes of opportunistic spectrum access in cognitive radio networks, including sensing locally, reporting sensing results and transmitting data, etc., an energy efficient cooperation strategy is investigated in this paper. First, we formulate the energy-efficient cooperation problem for two special scenarios with SUs in different distribution ranges. By determining how many SUs to cooperate and which SUs to cooperate in the spectrum sensing, the overall sensing and transmitting energy is minimized. Based on the theoretic analysis, a low-complexity heuristic algorithm is proposed to find the most appropriate set of cooperative SUs corresponding to the minimal energy consumption. The simulation results show that the proposed algorithm can achieve a near-optimal performance.
Qiufang Wang Wei Wang Zhaoyang Zhang
Department of Information Science and Electronic Engineering, Zhejiang Provincial Key Laboratory of Department of Information Science and Electronic Engineering,Zhejiang Provincial Key Laboratory of I
国际会议
2011亚太信号与信息处理协会年度峰会(APSIPAASC 2011)
西安
英文
1-7
2011-10-18（万方平台首次上网日期，不代表论文的发表时间）