Title :
Cascaded Clear Channel Assessment: Enhanced Carrier Sensing for Cognitive Radios
Author :
Soo Young Shin ; Ramachandran, I. ; Roy, Sandip ; Wook Hyun Kwon
Author_Institution :
Univ. of Washington, Seattle
Abstract :
In this paper, a new clear channel assessment (CCA) method: cascaded-CCA, is proposed that is apropos for next generation cognitive radios. The primary motivation for the proposed approach is to integrate the respective advantages of two ´standard´ CCA mechanisms (energy detection and preamble detection) to arrive at a new dual-threshold CCA family that can provide greater flexibility towards tuning MAC performance. The performance of cascaded-CCA is explored via MATLAB simulations that implement the CCA modules and medium access control (MAC) protocol for IEEE 802.11 and IEEE 802.15.4 as representative examples.
Keywords :
access protocols; cognitive radio; wireless channels; CCA method; IEEE 802.11; IEEE 802.15.4; MAC protocol; clear channel assessment; cognitive radios; medium access control; Access protocols; Chromium; Cognitive radio; Communications Society; Detectors; Energy consumption; Energy efficiency; MATLAB; Media Access Protocol; Throughput;
Conference_Titel :
Communications, 2007. ICC '07. IEEE International Conference on
Conference_Location :
Glasgow
Print_ISBN :
1-4244-0353-7
DOI :
10.1109/ICC.2007.1081
