CSMA/CA-based MAC protocol in cognitive radio network
Yanchang Liu, Shaohai Hu, Yang Xiao, Xiaoli Liu, Guangzhi Qu, Kiseon Kim · 2010
Different from the MAC of IEEE 802.11, the application of IEEE 802.22 suffers the uncertain spectrum and frequency width, which can not ensure the access of mobile users to be valid. To solve the problem, in this paper, we modify the CSMA/CA mechanism in order to make it suit the Cognitive Radio environments, in which the spectrum can be effectively used. We validate the modification by numerical analysis.