Energy-constrained cooperative spectrum sensing in cognitive radio networks - Details

author：

Feng, Xinxin (Feng, Xinxin.) ^[1] (Scholars：冯心欣) | Gan, Xiaoying (Gan, Xiaoying.) ^[2] | Wang, Xinbing (Wang, Xinbing.) ^[3]

Indexed by：

EI Scopus

Abstract：

How　to　set　spectrum　sensing　duration　is　an　important　issue　in　Cognitive　Radio　(CR)　networks,　which　could　greatly　affect　energy　efficiency　and　system　throughput.　Over　sensing　would　result　in　insufficient　transmission　period,　while　inadequate　sensing　would　incur　false　alarm　and　miss　detection.　This　paper　studies　how　to　choose　an　optimal　sensing　duration　to　strike　a　balance　between　energy　consumption　and　system　throughput.　We　focus　on　a　cooperative　sensing　scenario,　where　several　secondary　users　form　a　group　to　guarantee　more　accurate　sensing　results.　By　formulating　the　transmission　cost　in　terms　of　the　energy　consumption　of　sensing　process　and　transmission　process,　we　propose　a　comprehensive　utility　function.　The　maximization　of　the　utility　function　is　obtained　with　the　constraints　of　sufficient　protect　for　primary　users.　The　existence　of　the　optimal　sensing　duration　is　proved　accordingly.　Numerical　results　show　that　secondary　users　can　achieve　almost　the　maximum　throughput　with　significant　energy　saving　when　utilizing　optimal　sensing　duration.　©　2011　IEEE.

Keyword：

Cognitive radio Energy efficiency Energy utilization

Community：

[ 1 ] [Feng, Xinxin]Dept. of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
[ 2 ] [Feng, Xinxin]College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, China
[ 3 ] [Gan, Xiaoying]Dept. of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
[ 4 ] [Wang, Xinbing]Dept. of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China