Title :
A distributed relay selection algorithm for cognitive radio ad-hoc networks
Author :
Li, Yun ; Zhang, Ruifeng ; Wang, Chonggang ; Daneshmand, Ali ; You, Xiaohu
Author_Institution :
Special Res. Center for Opt. Internet & Wireless Inf. Networks, Chongqing Univ. of Post & Telecommun., Chongqing, China
Abstract :
Cognitive radio has been proposed as the means for secondary users to promote the efficient utilization of spectrum. Meanwhile, Cooperative relay is well known as a powerful technology to combat signal fading in a wireless medium. In this paper, we discuss a new relay selection algorithm for cognitive radio ad-hoc networks by utilizing cooperative relay to improve spectrum diversity and transmission rate. We define a cooperation-table which considers several aspects including channel gain, channel available probability and spectrum heterogeneity of secondary nodes. Based on this cooperation-table, a new distributed relay selection algorithm is proposed that choose a relay node to maximize the transmission rate of the source node. Simulation results demonstrate the effectiveness of the relay selection algorithm.
Keywords :
ad hoc networks; cognitive radio; cooperative communication; fading channels; telecommunication network routing; ad hoc networks; channel available probability; channel gain; cognitive radio; cooperative relay; distributed relay selection; secondary users; signal fading; spectrum diversity; spectrum heterogeneity; transmission rate; Ad hoc networks; Algorithm design and analysis; Cognitive radio; Peer to peer computing; Relays; Strontium; Throughput; Cognitive radio; cooperation-table; cooperative communications; relay selection;
Conference_Titel :
Network and Service Management (CNSM), 2010 International Conference on
Conference_Location :
Niagara Falls, ON
Print_ISBN :
978-1-4244-8910-7
Electronic_ISBN :
978-1-4244-8908-4
DOI :
10.1109/CNSM.2010.5691264
