NDLI: A Retransmission Based Collision Solution for Cognitive Radio Networks

Content Provider	IEEE Xplore Digital Library
Author	Li Na Wang Ye Gao Bo Zhang Qinyu
Copyright Year	2012
Abstract	In cognitive radio (CR) networks, the secondary users are allowed to use the licensed frequency bands of the primary users (PUs) when these bands are vacant. However,once the PUs come back, they may collide with the transmitting secondary users. Therefore, the secondary users are generally required to sense the channel periodically to ensure that the primary users are absent during their data transmission in order to avoid the collisions with primary users. In this paper, we ﬁrst analyze the performance of the periodic sensing scheme. Then retransmission scheme based on the cooperation of the primary base station(PBS) and secondary access point (AP) associated with Independent Component Analysis (ICA) algorithm is proposed, which relieves the impact of packet loss for primary users,while improving the transmission eﬃciency for secondary users.The computer simulation shows that under the limited spectrum access chances, the proposed scheme outperforms periodical sensing schemes.
Starting Page	1
Ending Page	5
File Size	317569
Page Count	5
File Format	PDF
ISBN	9781612846842
ISSN	21619654
e-ISBN	9781612846835
DOI	10.1109/WiCOM.2012.6478363
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-09-21
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Base stations Throughput Sensors Data communication Cognitive radio Optimization Signal to noise ratio
Content Type	Text
Resource Type	Article

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