Title :
A Cross-Layer Rethink on the Sensing-Throughput Tradeoff for Cognitive Radio Networks
Author :
Shaojie Zhang ; Haitao Zhao ; Shan Wang ; Jibo Wei
Author_Institution :
Sch. of Electron. Sci. & Eng., Nat. Univ. of Defense Technol., Changsha, China
Abstract :
This letter investigates the sensing-throughput tradeoff problem in cognitive radio networks from a cross-layer perspective, jointly considering the impact of imperfect spectrum sensing and access contention. Furthermore, the optimized solution to this tradeoff is formulated via taking the interference probability, rather than the detection probability, as the optimization constraint. Compared with the results obtained only from the physical layer, the proposed solutions can improve the secondary throughput significantly.
Keywords :
cognitive radio; optimisation; radio spectrum management; radiofrequency interference; signal detection; access contention; cognitive radio networks; cross-layer perspective; cross-layer rethink; detection probability; imperfect spectrum sensing; interference probability; optimization constraint; secondary throughput; sensing-throughput tradeoff; Cognitive radio; Interference; Optimization; Physical layer; Radiation detectors; Throughput; Cognitive radio networks; cross-layer design; sensing-throughput tradeoff;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2014.2325021
