NDLI: Broadcasting with a battery limited energy harvesting rechargeable transmitter

Content Provider	IEEE Xplore Digital Library
Author	Ozel, O. Jing Yang Ulukus, S.
Copyright Year	2011
Description	Author affiliation: Department of Electrical and Computer Engineering, University of Maryland, College Park, MD 20742 (Ozel, O.; Ulukus, S.) \|\| Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI 53706 (Jing Yang)
Abstract	We consider the minimization of the transmission completion time with a battery limited energy harvesting transmitter in a two-user AWGN broadcast channel. The transmitter has fixed number of packets for each receiver and energy is modeled to arrive (be harvested) at the transmitter at random instants. The battery at the transmitter has a finite storage capacity, hence energy may overflow without being utilized for data transmission. We derive the optimal offline transmission policy that minimizes the time by which all of the data packets are delivered to their respective destinations. We analyze the structural properties of the optimal transmission policy using a dual problem. We find the optimal total transmit power sequence by a directional water-filling algorithm. We prove that there exists a cut-off power level such that if the allocated power is lower than this level, then only the stronger user is served in that epoch; otherwise, the power above this level is allocated to the weaker user. Based on these properties, we propose an algorithm that gives the globally optimal offline policy. The proposed algorithm uses directional water-filling repetitively.
Starting Page	205
Ending Page	212
File Size	524304
Page Count	8
File Format	PDF
ISBN	9781612848228
e-ISBN	9781612848242
DOI	10.1109/WIOPT.2011.5930017
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-05-09
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Transmitters AWGN Receivers Batteries Energy harvesting Data communication Resource management
Content Type	Text
Resource Type	Article

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