Abstract
The inherent many-to-one flow of traffic in wireless sensor networks produces a skewed distribution of energy consumption rates leading to the early demise of those sensors that are critical to the ability of surviving nodes to communicate their readings to the data collection center. Numerous previous approaches aimed at balancing the consumption of energy in wireless networks are based on a linear programming-based minmax formulation that seeks to maximize the minimum lifetime of sensors in a network. However, this approach fails to provide a clear picture of the cost at which this optimization is achieved and focuses attention on a single sensor, the minimum lifetime sensor. This paper makes two contributions: it puts forward a new understanding of sensor network lifetime based on statistical measures, mean and variance, of node power consumption rates that provides a more inclusive view of the consumption rates, and it provides an optimal quadratic programming (QP) formulation that provides an upper bound on the lifetime under a given set of topological and energy budgetary constraints. Our results demonstrate that the QP formulation has the ability to provide a soft trade-off between the mean and variance of power consumption rates.
Original language | English |
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Title of host publication | 2007 41st Annual Conference on Information Sciences and Systems |
Publisher | IEEE |
Pages | 214-219 |
Number of pages | 6 |
ISBN (Print) | 1-4244-1037-1 |
DOIs | |
Publication status | Published - 16 Mar 2007 |
Event | 2007 41st Annual Conference on Information Sciences and Systems - Baltimore, MD, USA Duration: 14 Mar 2007 → 16 Mar 2007 |
Conference
Conference | 2007 41st Annual Conference on Information Sciences and Systems |
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Period | 14/03/07 → 16/03/07 |
Keywords
- Wireless sensor networks
- Energy consumption
- Base stations
- Telecommunication traffic
- Quadratic programming
- Energy measurement
- Sensor systems
- Routing
- Fluid flow measurement
- Minimax techniques