Title :
Slotted Aloha for cognitive radio users and its tagged user analysis
Author :
Sanqing Hu ; Yu-Dong Yao ; Sheikh, Asrar U.
Author_Institution :
Dept. of Electr. & Comput. Eng., Stevens Inst. of Technol., Hoboken, NJ, USA
Abstract :
Cognitive radio (CR) is a promising dynamic spectrum access technique to improve the utilization of the licensed spectrum. In this paper, we investigate the medium access control (MAC) protocol for CR networks and propose a cognitive MAC using slotted Aloha to enable CR users to access spectrum holes in a licensed frequency band. In order to avoid the high computational complexities of traditional Markovian analysis, we investigate the tagged user analysis (TUA) based on queuing theories in CR scenarios and use TUA to analyze the proposed cognitive MAC performance. The theoretical derivations based on TUA are presented and computer simulations are performed to evaluate the CR network performance as well as TUA accuracy. The network throughput, packet blocking probability, queue length, packet waiting time and response time are evaluated.
Keywords :
Markov processes; access protocols; cognitive radio; computational complexity; probability; queueing theory; CR network performance; CR networks; Markovian analysis; TUA; cognitive MAC protocol; cognitive radio users; computational complexity; computer simulations; dynamic spectrum access technique; licensed frequency band; medium access control protocol; network throughput; packet blocking probability; packet response time; packet waiting time; queue length; queuing theories; slotted ALOHA; spectrum holes; tagged user analysis; Accuracy; cognitive radio; medium access control; queuing theory; slotted Aloha; tagged user analysis;
Conference_Titel :
Wireless and Optical Communications Conference (WOCC), 2012 21st Annual
Conference_Location :
Kaohsiung
Print_ISBN :
978-1-4673-0940-0
DOI :
10.1109/WOCC.2012.6198140
