The transport capacity of wireless networks over fading channels

doi:10.1109/TIT.2004.842628

CSpace

	The transport capacity of wireless networks over fading channels
	Xue, F ; Xie, LL ; Kumar, PR
	2005-03-01
发表期刊	IEEE TRANSACTIONS ON INFORMATION THEORY
ISSN	0018-9448
卷号	51 期号:3 页码:834-847
摘要	We consider networks consisting of nodes with radios, and without any wired infrastructure, thus necessitating all communication to take place only over the shared wireless medium. The main focus of this paper is on the effect of fading in such wireless networks. We examine the attenuation regime where either the medium is absorptive, a situation which generally prevails, or the path loss exponent is greater than 3. We study the transport capacity, defined as the supremum over the set of feasible rate vectors of the distance weighted sum of rates. We consider two assumption sets. Under the first assumption set, which essentially requires only a mild time average type of bound on the fading process, we show that the transport capacity can grow no faster than 0(n), where n denotes the number of nodes, even when the channel state information (CSI) is available noncausally at both the transmitters and the receivers. This assumption includes common models of stationary ergodic channels; constant, frequency-selective channels; flat, rapidly varying channels; and flat slowly varying channels. In the second assumption set, which essentially features an independence, time average of expectation, and nonzeroness condition on the fading process, we constructively show how to achieve transport capacity of Omega(n) even when the CSI is unknown to both the transmitters and the receivers, provided that every node has an appropriately nearby node. This assumption set includes common models of independent and identically distributed (i.i.d.) channels; constant, flat channels; and constant, frequency-selective channels. The transport capacity is achieved by nodes communicating only with neighbors, and using only point-to-point coding. The thrust of these results is that the multihop strategy, toward which much protocol development activity is currently targeted, is appropriate for fading environments. The low attenuation regime is open.
关键词	capacity fading channels transport capacity wireless networks
DOI	10.1109/TIT.2004.842628
语种	英语
WOS研究方向	Computer Science ; Engineering
WOS类目	Computer Science, Information Systems ; Engineering, Electrical & Electronic
WOS记录号	WOS:000227204100005
出版者	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
引用统计
文献类型	期刊论文
条目标识符	http://ir.amss.ac.cn/handle/2S8OKBNM/2370
专题	中国科学院数学与系统科学研究院
通讯作者	Xue, F
作者单位	1.Univ Illinois, Dept Elect & Comp Engn, Urbana, IL 61801 USA 2.Univ Illinois, Coordinated Sci Lab, Urbana, IL 61801 USA 3.Chinese Acad Sci, Inst Syst Sci, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Xue, F,Xie, LL,Kumar, PR. The transport capacity of wireless networks over fading channels[J]. IEEE TRANSACTIONS ON INFORMATION THEORY,2005,51(3):834-847.
APA	Xue, F,Xie, LL,&Kumar, PR.(2005).The transport capacity of wireless networks over fading channels.IEEE TRANSACTIONS ON INFORMATION THEORY,51(3),834-847.
MLA	Xue, F,et al."The transport capacity of wireless networks over fading channels".IEEE TRANSACTIONS ON INFORMATION THEORY 51.3(2005):834-847.