A Fuzzy-based Dynamic Channel Allocation Scheme in Cognitive Radio Networks

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Title:	A Fuzzy-based Dynamic Channel Allocation Scheme in Cognitive Radio Networks
Authors:	王英宏;廖守立;童翊嘉
Contributors:	淡江大學資訊工程學系
Keywords:	Cognitive Radio Networks;Fuzzy Interference System;Channel Allocation
Date:	2014-08-22
Issue Date:	2014-12-25 16:15:26 (UTC+8)
Publisher:	北京建築大學
Abstract:	In traditional wireless networks, fixed allocation of spectrum is one of the main reason causing low utilization of spectrum. In order to solve this problem, a new wireless communication model has been proposed, which called Cognitive Radio Networks (CRN). CRN adopts Dynamic Spectrum Access (DSA) technology, thus it can flexibly use the spectrum which primary user temporarily unused. In cognitive radio networks, due to each secondary user (SU) has different location and surrounding spectrum environment, it may have variety of available channels. How to assign these available channels is the crucial point of system performance. However, existing methods doesn’t consider the problem of multipath fading; therefore, this study proposed an improved channel allocation scheme. We consider the received signal strength to define the channel access priority of secondary users applied by fuzzy theory. Finally, the simulation results show the superior of our approach and verify the effectiveness of the proposed scheme.
Relation:	2014 The 8th Cross-Strait Conference on Information Science and Technology
Appears in Collections:	[Graduate Institute & Department of Computer Science and Information Engineering] Proceeding

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