Optimal Cooperative Sensing Order Using Inactive Secondary Users in Cognitive Radio Networks  

作　　者：LIU Xinyi LI Jiandong JIANG Jian 

机构地区：[1]State Key Laboratory of Integrated Service Networks, Xidian University [2]China Academy of Space Technology

出　　处：《Chinese Journal of Electronics》2014年第2期394-398,共5页电子学报（英文版）

基　　金：supported by National Nature Science Foundation of China(No.61231008,No.61101143);National Basic Research Program of China(973 Program)(No.2009CB320404);the Program for Changjiang Scholars and Innovative Research Team in University(No.IRT0852);the 111 Project(No.B08038)

摘　　要：A novel cooperative spectrum sensing order which utilizes inactive Secondary users(SUs) efficiently based on maximum throughput has been proposed in Cognitive radio networks(CRNs). In order to predict the states of Primary users(PUs), we build the PU's traffic pattern as a Continuous-time Markov chain(CTMC) process. CRNs obtain the maximum throughput while SUs sense the licensed channels with the optimal order. The numerical simulation results show that the proposed order based on spectrum sensing scheme can achieve larger channel utilization and lower sensing overhead as compared with the spectrum sensing scheme without using the optimal order sensing. After considering the report overhead of SUs, the optimal number of inactive SUs for the maximum throughput can be found.A novel cooperative spectrum sensing or- der which utilizes inactive Secondary users （SUs） efficiently based on maximum throughput has been proposed in Cog- nitive radio networks （CRNs）. In order to predict the states of Primary users （PUs）, we build the PU＇s traffic pattern as a Continuous-time Markov chain （CTMC） pro- cess. CRNs obtain the maximum throughput while SUs sense the licensed channels with the optimal order. The numerical simulation results show that the proposed or- der based on spectrum sensing scheme can achieve larger channel utilization and lower sensing overhead as compared with the spectrum sensing scheme without using the opti- mal order sensing. After considering the report overhead of SUs, the optimal number of inactive SUs for the maxi- mum throughput can be found.

关 键 词：Cognitive radio networks Optimal coop- erative sensing order Inactive secondary users~ Prediction~ Maximum throughput. 

分 类 号：TN925[电子电信—通信与信息系统]