DocumentCode :
2975324
Title :
Full duplex spectrum sensing in non-time-slotted cognitive radio networks
Author :
Cheng, Wenchi ; Zhang, Xi ; Hailin Zhang
Author_Institution :
Dept. of Electr. & Comput. Eng., Texas A&M Univ., College Station, TX, USA
fYear :
2011
fDate :
7-10 Nov. 2011
Firstpage :
1029
Lastpage :
1034
Abstract :
In cognitive radio networks, previous works almost assume that the primary (licensed) traffic is time-slotted. In time-slotted cognitive radio networks, the secondary (unlicensed) users only need to spend a short time to sense the spectrum because the primary users´ states (active or not active) are not changed during the whole secondary frame. However, in realistic cases, the primary traffic is non-time-slotted, which means the primary users can become to be active or not active at any time during the whole secondary frame. Obviously, using the traditional half duplex spectrum sensing scheme, it is impossible for the secondary users to detect the state change in their transmission periods. In this paper, we derive the probability of detection and the probability of false alarm for non-time-slotted cognitive radio networks. We propose the continuous-time Markov chain model to analyze the achievable throughput of primary users and secondary users. To achieve the required primary users´ throughput, we develop the full duplex spectrum sensing scheme for non-time-slotted cognitive radio networks. Analyses and numerical results show that using our proposed full duplex spectrum sensing scheme, the primary users can achieve their required throughput and the secondary users´ achievable throughput can be increased compared with that of using the half duplex spectrum sensing scheme in non-time-slotted cognitive radio networks.
Keywords :
Markov processes; cognitive radio; radio spectrum management; telecommunication traffic; continuous-time Markov chain; detection probability; false alarm; full duplex spectrum sensing; half duplex spectrum sensing scheme; nontime-slotted cognitive radio network; Cognitive radio; Educational institutions; Markov processes; Receivers; Sensors; Signal to noise ratio; Throughput; Cognitive radio networks (CRNs); continuous-time Markov chain; full duplex spectrum sensing; non-timeslotted CRNs;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
MILITARY COMMUNICATIONS CONFERENCE, 2011 - MILCOM 2011
Conference_Location :
Baltimore, MD
ISSN :
2155-7578
Print_ISBN :
978-1-4673-0079-7
Type :
conf
DOI :
10.1109/MILCOM.2011.6127431
Filename :
6127431
Link To Document :
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