NDLI: Efficient energy utilization with time constraints in mobile time varying channels

Content Provider	IEEE Xplore Digital Library
Author	Metzner, J.J. Jong-Moon Chung
Copyright Year	1967
Abstract	In this paper, the efficiency in energy utilization under time constraints is compared between two data transmission strategies: (1) transmission through sending a fixed number of copies, and (2) the ARQ technique. The analysis includes a case where each packet repetition is decoded separately, and cases where a combined decision is used. (1) For constant channel conditions and no combining, results are compared for various specifications of probability of failure (P) and maximum number (n) of transmissions. There is a large saving of energy for the ARQ technique, which increases greatly for smaller P values and significantly for larger n. (2) Variable channel conditions and decision combining techniques are assumed for two sub-cases: (a) fast fading channel with a Rayleigh distribution, where it is assumed that successive transmissions or copies relating to a given packet experience independent channel conditions. (b) lognormally shadowed Rayleigh slow fading channel, where successive transmissions or copies relating to a given packet experience identical channel conditions. The (2a) case yields a substantial energy saving compared to sending fixed multiple copies, though not as great as the noncombining case (1). The (2b) case shows a very large saving in energy utilization with some examples of about a 20:1 or more factor reduction in energy utilization when the strategy includes increasing the energy increments with successive transmissions.
Sponsorship	IEEE Vehicular Technology Society
Starting Page	1169
Ending Page	1177
Page Count	9
File Size	251123
File Format	PDF
ISSN	00189545
Volume Number	49
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Time factors Mobile communication Automatic repeat request Feedback Fading Delay effects Wireless communication Power engineering and energy Forward error correction Batteries
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Automotive Engineering Computer Networks and Communications Electrical and Electronic Engineering Aerospace Engineering

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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