Optimal Energy Management Policies for Energy Harvesting Sensor Nodes

Details Optimal Energy Management Policies for Energy Harvesting Sensor Nodes Optimal Energy Management Policies for Energy Harvesting Sensor Nodes

2008-09-23

arxiv.org/abs/0809.3908v1

Computer Science

Networking and Internet Architecture

Submitted to the IEEE Transactions on Wireless Communications; 22 pages with 10 figures

Scientific paper

We study a sensor node with an energy harvesting source. The generated energy can be stored in a buffer. The sensor node periodically senses a random field and generates a packet. These packets are stored in a queue and transmitted using the energy available at that time. We obtain energy management policies that are throughput optimal, i.e., the data queue stays stable for the largest possible data rate. Next we obtain energy management policies which minimize the mean delay in the queue.We also compare performance of several easily implementable sub-optimal energy management policies. A greedy policy is identified which, in low SNR regime, is throughput optimal and also minimizes mean delay.

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