Name
Title | ||
|---|---|---|
Measurement Scheduling for Soil Moisture Sensing: From Physical Models to Optimal Control |
Abstract | ||
|---|---|---|
In this paper, we consider the problem of monitoring soil moisture evolution using a wireless network of in situ sensors. Continuously sampling moisture levels with these sensors incurs high-maintenance and energy consumption costs, which are particularly undesirable for wireless networks. Our main hypothesis is that a sparser set of measurements can meet the monitoring objectives in an energy-efficient manner. The underlying idea is that we can trade off some inaccuracy in estimating soil moisture evolution for a significant reduction in energy consumption. We investigate how to dynamically schedule the sensor measurements so as to balance this tradeoff. Unlike many prior studies on sensor scheduling that make generic assumptions on the statistics of the observed phenomenon, we obtain statistics of soil moisture evolution from a physical model. We formulate the optimal measurement scheduling and estimation problem as a partially observable Markov decision problem (POMDP). We then utilize special features of the problem to approximate the POMDP by a computationally simpler finite-state Markov decision problem (MDP). The result is a scalable, implementable technology that we have tested and validated numerically and in the field. |
Year | DOI | Venue |
|---|---|---|
2010 | 10.1109/JPROC.2010.2052532 | Proceedings of the IEEE |
Keywords | Field | DocType |
markov processes,moisture measurement,optimal control,soil,wireless sensor networks,energy conservation,energy-efficient manner,measurement scheduling,partially observable markov decision problem,physical models,soil moisture sensing,wireless sensor network,dynamic programming,markov decision process,scheduling,stochastic optimal control,physical model,stability,wireless network,sensors,state,horizon,energy efficient,dynamic scheduling,soil moisture,systems,algorithms | Wireless network,Mathematical optimization,Optimal control,Markov process,Partially observable Markov decision process,Scheduling (computing),Markov decision process,Control engineering,Engineering,Wireless sensor network,Energy consumption | Journal |
Volume | Issue | ISSN |
98 | 11 | 0018-9219 |
Citations | PageRank | References |
8 | 0.88 | 10 |
Authors | ||
9 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| David I. Shuman | 1 | 472 | 22.38 |
| Ashutosh Nayyar | 2 | 240 | 30.84 |
| Aditya Mahajan | 3 | 183 | 22.16 |
| Yuriy Goykhman | 4 | 16 | 2.17 |
| Ke Li | 5 | 15 | 1.43 |
| Mingyan Liu | 6 | 2569 | 224.92 |
| Demosthenis Teneketzis | 7 | 612 | 85.73 |
| Mahta Moghaddam | 8 | 730 | 88.81 |
| Dara Entekhabi | 9 | 416 | 75.14 |