Delay Sensitive Communications over Cognitive Radio Networks

doi:10.1109/TWC.2012.020812.110133

CORC > 北京大学 > 信息科学技术学院

	Delay Sensitive Communications over Cognitive Radio Networks
	Wang, Feng ; Huang, Jianwei ; Zhao, Yuping
刊名	ieee transactions on wireless communications
	2012
关键词	Admission control Markov decision process Bellman&apos rollout algorithm cognitive radio networks spectrum overlay CALL ADMISSION CONTROL RESOURCE-ALLOCATION SPECTRUM ACCESS s equation
DOI	10.1109/TWC.2012.020812.110133
英文摘要	Supporting the quality of service of unlicensed users in cognitive radio networks is very challenging, mainly due to the dynamic resource availability induced by the licensed users' activities. In this paper, we derive the optimal admission control and channel allocation decisions in cognitive overlay networks to support delay sensitive communications of unlicensed users. We formulate it as a Markov decision process problem, and solve it by transforming the original formulation into a stochastic shortest path problem. We then propose a simple heuristic control policy, which includes a threshold-based admission control scheme and and a largest-delay-first channel allocation scheme, and prove the optimality of the largest-delay-first channel allocation scheme. We further propose an improved policy using the rollout algorithm. By comparing the performance of both proposed policies with the upper-bound of the maximum revenue, we show that our policies achieve close-to-optimal performances with low complexities.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000303068900021&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Engineering, Electrical & Electronic; Telecommunications; SCI(E); EI; 14; ARTICLE; 4; 1402-1411; 11
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/152490]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Wang, Feng,Huang, Jianwei,Zhao, Yuping. Delay Sensitive Communications over Cognitive Radio Networks[J]. ieee transactions on wireless communications,2012.
APA	Wang, Feng,Huang, Jianwei,&Zhao, Yuping.(2012).Delay Sensitive Communications over Cognitive Radio Networks.ieee transactions on wireless communications.
MLA	Wang, Feng,et al."Delay Sensitive Communications over Cognitive Radio Networks".ieee transactions on wireless communications (2012).