QQ客服 官方微博 反馈留言

	An optimal OSA approach based on channel-usage estimate under collision probability constraint in cognitive radio systems
	Xiao, Qinghai ; Li, Yunzhou ; Zhao, Ming ; Zhou, Shidong ; Wang, Jing
	2010-10-12 ; 2010-10-12
关键词	Opportunistic spectrum access Spectrum holes utilization Collision probability Collision tolerable level Telecommunications
中文摘要	Opportunistic spectrum access system allows the secondary user to access spectrum holes not being utilized by the primary user. Traditional opportunistic spectrum access approaches only sense and utilize current spectrum holes. This can result in uncontrollable collision probability, which exceed the maximum collision probability allowed by the primary user network. In this paper, we consider a cognitive radio system with one primary channel and one secondary user, and then, we introduce a channel-usage pattern model and a fundamental access scheme in this system. Based on the fundamental access scheme, we adopt fixed detection duration and transmission duration ratio approach to analyze what and how to determine spectrum holes utilization and collision probability in this model. On the basis of this model and fundamental access scheme, we study optimal opportunistic spectrum access problem and formulate it as an optimization problem that the secondary user maximizes spectrum holes utilization under the constraint of collision tolerable level, and then we solve this optimization problem in two cases: one is that the idle period is exponential distribution, the other is that the idle period is Pareto distribution. According to the solution of the optimization problem, we respectively propose an optimal opportunistic spectrum access algorithm in each case. Theoretical analysis and simulation results both show that the optimal opportunistic spectrum access algorithms can maximize spectrum holes utilization under the constraint that the collision probability is bounded below collision tolerable level.
语种	英语 ; 英语
出版者	SPRINGER FRANCE ; PARIS ; 22 RUE DE PALESTRO, PARIS, 75002, FRANCE
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/82548]
专题	清华大学
推荐引用方式 GB/T 7714	Xiao, Qinghai,Li, Yunzhou,Zhao, Ming,et al. An optimal OSA approach based on channel-usage estimate under collision probability constraint in cognitive radio systems[J],2010, 2010.
APA	Xiao, Qinghai,Li, Yunzhou,Zhao, Ming,Zhou, Shidong,&Wang, Jing.(2010).An optimal OSA approach based on channel-usage estimate under collision probability constraint in cognitive radio systems..
MLA	Xiao, Qinghai,et al."An optimal OSA approach based on channel-usage estimate under collision probability constraint in cognitive radio systems".(2010).

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。