Title :
Sensing-Delay Tradeoff for Cognitive Radio Networks with QoS Considerations
Author :
Chin-Liang Wang ; Han-Wei Chen ; Yuan-Xiang Cheng
Author_Institution :
Dept. of Electr. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan
Abstract :
In cognitive radio (CR) systems, the longer the sensing duration, the better the sensing performance will be; however, a long sensing duration would cause a large packet delay for CR transmission, which is not desirable for real-time applications. In this paper, we propose a media access control MAC layer model for CR networks and formulate a tradeoff problem between the sensing performance and the packet delay. We then consider quality of service metrics, including the packet drop rate and the achievable throughput when optimizing the sensing duration such that the average packet delay is minimized. Both theoretical and simulation results are given to demonstrate the effectiveness of the proposed approaches for CR networks.
Keywords :
access protocols; cognitive radio; packet radio networks; quality of service; CR transmission; MAC layer; QoS considerations; cognitive radio networks; media access control; packet delay; packet drop rate; quality of service metrics; sensing duration; sensing-delay tradeoff; Cognitive radio; Delays; Optimized production technology; Quality of service; Sensors; Signal to noise ratio; Throughput;
Conference_Titel :
Vehicular Technology Conference (VTC Fall), 2013 IEEE 78th
Conference_Location :
Las Vegas, NV
DOI :
10.1109/VTCFall.2013.6692408