Optimal Sleep-Wake Policies for an Energy Harvesting Sensor Node

Joseph, Vinay and Sharma, Vinod and Mukherji, Utpal (2009) Optimal Sleep-Wake Policies for an Energy Harvesting Sensor Node. In: IEEE International Conference on Communications (ICC 2009), JUN 14-18, 2009, Dresden, pp. 52-57.

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Abstract

We study a sensor node with an energy harvesting source. In any slot,the sensor node is in one of two modes: Wake or Sleep. The generated energy is stored in a buffer. The sensor node senses a random field and generates a packet when it is awake. These packets are stored in a queue and transmitted in the wake mode using the energy available in the energy buffer. We obtain energy management policies which minimize a linear combination of the mean queue length and the mean data loss rate. Then, we obtain two easily implementable suboptimal policies and compare their performance to that of the optimal policy. Next, we extend the Throughput Optimal policy developed in our previous work to sensors with two modes. Via this policy, we can increase the through put substantially and stabilize the data queue by allowing the node to sleep in some slots and to drop some generated packets. This policy requires minimal statistical knowledge of the system. We also modify this policy to decrease the switching costs.

Item Type:	Conference Paper
Series.:	IEEE International Conference on Communications
Publisher:	IEEE
Additional Information:	Copyright 2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords:	Energy harvesting sensor nodes;Sleep-Wake Policies;Throughput Optimal Policies.
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	08 Sep 2010 08:28
Last Modified:	19 Sep 2010 06:15
URI:	http://eprints.iisc.ac.in/id/eprint/32035

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