Title :
Channel and sensing aware channel access policy for multi-channel cognitive radio networks
Author :
Wang, Shu-Hsien ; Hsu, Chih-Yu ; Hong, Y. -W Peter
Author_Institution :
Inst. of Commun. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan
Abstract :
We propose a reservation-based channel access policy for multi-channel cognitive radio networks. To enhance the throughput of secondary users (SUs), SUs are allowed to select channels opportunistically according to both the local channel state information (CSI) and the spectrum sensing outcomes. SUs will then compete for the right of transmission on the chosen channel by emitting reservation packets to the access point sequentially according to their local CSI. We further devise a proper threshold on channel gains such that only the SUs whose channel gains are sufficiently high can reserve channels and the interference from SUs to the licensed network can be limited. A channel aware splitting algorithm is adopted to schedule the SU with the highest channel gain to transmit at each time instant. From simulations, the proposed channel access policy outperforms the policies that take into consideration only CSI or sensing outcomes.
Keywords :
cognitive radio; wireless channels; access point; channel aware splitting algorithm; channel gains; licensed network; local channel state information; multichannel cognitive radio networks; reservation packets; reservation-based channel access policy; secondary users; sensing aware channel access policy; spectrum sensing outcomes; Channel state information; Cognitive radio; Interference; Media Access Protocol; Sensors; Throughput; Vectors; channel access policy; cognitive radio; multi-user diversity;
Conference_Titel :
Acoustics, Speech and Signal Processing (ICASSP), 2012 IEEE International Conference on
Conference_Location :
Kyoto
Print_ISBN :
978-1-4673-0045-2
Electronic_ISBN :
1520-6149
DOI :
10.1109/ICASSP.2012.6288581