DocumentCode :
21561
Title :
Energy Harvesting Receivers: Packet Sampling and Decoding Policies
Author :
Yates, Roy D. ; Mahdavi-Doost, Hajar
Author_Institution :
Dept. of Electr. & Comput. Eng., Rutgers Univ., North Brunswick, NJ, USA
Volume :
33
Issue :
3
fYear :
2015
fDate :
Mar-15
Firstpage :
558
Lastpage :
570
Abstract :
When receivers rely on stochastic energy harvesting, power outages will reduce the reliable communication rate. To model the receiver, we decompose the processing tasks in two parts: (1) sampling or Analog-to-Digital Conversion (ADC), which includes all RF front-end processing, and (2) decoding. This work considers a time-slotted system in which a source transmits coded packets through a time-invariant channel to a receiver with a finite battery and a decoder whose energy consumption can be adapted from slot to slot. Based on the relative energy costs of sampling and decoding and a stochastic model for the energy harvesting, we determine sampling and decoding policies that maximize the packet throughput. When the receiver is battery-constrained, we show that the throughput is maximized by a deferred decoding policy that samples packets at every opportunity but decodes backlogged packets using only excess energy that would otherwise be discarded. This result is shown to hold for Markov-modulated energy harvesting processes with arbitrary memory. In addition, when the average energy harvesting rate is not sufficient to decode all packets, a modified policy that defers decoding only when the backlog is below a threshold is shown to perform well when the threshold is carefully chosen.
Keywords :
analogue-digital conversion; decoding; energy harvesting; power consumption; power system reliability; Markov-modulated energy harvesting; RF front-end processing; analog-to-digital conversion; backlogged packets; coded packets; decoding policy; energy consumption; energy harvesting receivers; packet sampling; power outages; stochastic energy harvesting; time-invariant channel; time-slotted system; Batteries; Decoding; Energy harvesting; Markov processes; Receivers; Throughput; Wireless communication; energy harvesting receivers; renewable energy sources; wireless communication,;
fLanguage :
English
Journal_Title :
Selected Areas in Communications, IEEE Journal on
Publisher :
ieee
ISSN :
0733-8716
Type :
jour
DOI :
10.1109/JSAC.2015.2391834
Filename :
7010904
Link To Document :
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