NDLI: Bounds on Dynamic Modulation Scaling for Wireless Sensor Networks

Content Provider	IEEE Xplore Digital Library
Author	Joshi, G. Jardosh, S. Ranjan, P.
Copyright Year	2007
Description	Author affiliation: DA-IICT, Gandhinagar (Joshi, G.; Jardosh, S.; Ranjan, P.)
Abstract	Wireless communication is the most energy expensive operation for energy constrained wireless sensor networks. Dynamic modulation scaling (DMS) is a technique useful for optimizing transmission energy with respect to number of packets that need to be transmitted at that particular time intervals. In general, DMS trades off transmission energy against transmission delays. Multilevel (M-ary) modulation is the key aspect for dynamic modulation scaling. Dynamically varying the constellation size b (number of bits per symbol) with respect to number of packets that need to be transmitted helps in optimizing transmission power. In this scenario it is very important to decide minimum and maximum bounds on constellation size (scale of modulation) otherwise it may result in performance degradation. In this paper various factors affecting minimum and maximum limit of b are discussed and it is shown that the individual node can decide minimum limit on b but for deciding maximum limit it needs to consider network aspects such as network topology, node density, location of particular node etc. Only proper selection of these limits results in optimized power consumption with satisfactory performance. Otherwise trying to save energy without satisfying performance parameters will require retransmission and the energy cost for that will be much higher than what was saved earlier.
Starting Page	13
Ending Page	16
File Size	3782102
Page Count	4
File Format	PDF
ISBN	9781424418770
DOI	10.1109/WCSN.2007.4475738
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-12-13
Publisher Place	India
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Constraint optimization Wireless communication Wireless sensor networks Energy consumption Transmitters Computer networks Hardware Dynamic voltage scaling Batteries Voltage control
Content Type	Text
Resource Type	Article

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