Green Access Point Selection for Wireless Local Area Networks Enhanced by Cognitive Radio

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	Green Access Point Selection for Wireless Local Area Networks Enhanced by Cognitive Radio
	Ge, Wendong; Chen, Shanzhi; Ji, Hong; Li, Xi; Leung, Victor C. M.
刊名	MOBILE NETWORKS & APPLICATIONS
	2013-08-01
卷号	18 期号:4;4 页码:553-566
关键词	Wlans Cognitive Radio Access Point Selection Green Communication Restless Bandits
文献子类	Article
英文摘要	In wireless local area networks (WLANs) made up of Extended Service Sets, access point (AP) selection is a key issue to improve the network performance and balance the traffic load. WLANs operating in the shared Industrial, Scientific and Medical band can benefit from the use of cognitive radio (CR) techniques to enable dynamic access to spectrum holes that are free from interference. In this paper, we propose an optimal Green AP Selection (GAPS) scheme, in which AP selection is optimized to maximize the system throughput while minimizing the energy consumption, for multi-rate WLANs enhanced by CRs. Different from most existing AP selection schemes, GAPS takes into account of the state transition tendency of APs and the influence of Automatic Rate Fallback mechanism in the Distributed Coordination Function. The AP selection problem is formulated as a restless bandit problem and solved by the primal-dual index heuristic algorithm based on first order relaxation to yield the GAPS scheme with the "indexability" property and hence a low complexity. GAPS is further divided into offline computation, which accounts for the bulk of the computations, and online selection, with a low complexity to facilitate implementation. Extensive simulation results illustrate the significant performance improvements of GAPS compared with existing AP selection schemes in different scenarios.
WOS关键词	DISTRIBUTED COORDINATION FUNCTION ; THROUGHPUT ANALYSIS ; CHANNEL ASSIGNMENT ; FADING CHANNELS ; 802.11 WLANS ; INTERFERENCE ; INDEX ; LAN
WOS研究方向	Computer Science ; Telecommunications
语种	英语
WOS记录号	WOS:000321870400010
内容类型	期刊论文
源URL	[http://ir.ia.ac.cn/handle/173211/40887]
专题	数字内容技术与服务研究中心_听觉模型与认知计算
推荐引用方式 GB/T 7714	Ge, Wendong,Chen, Shanzhi,Ji, Hong,et al. Green Access Point Selection for Wireless Local Area Networks Enhanced by Cognitive Radio[J]. MOBILE NETWORKS & APPLICATIONS,2013,18(4;4):553-566.
APA	Ge, Wendong,Chen, Shanzhi,Ji, Hong,Li, Xi,&Leung, Victor C. M..(2013).Green Access Point Selection for Wireless Local Area Networks Enhanced by Cognitive Radio.MOBILE NETWORKS & APPLICATIONS,18(4;4),553-566.
MLA	Ge, Wendong,et al."Green Access Point Selection for Wireless Local Area Networks Enhanced by Cognitive Radio".MOBILE NETWORKS & APPLICATIONS 18.4;4(2013):553-566.