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- Open Access
An Energy-Efficient Adaptive Modulation Suitable for Wireless Sensor Networks with SER and Throughput Constraints
EURASIP Journal on Wireless Communications and Networking volume 2007, Article number: 041401 (2007)
We consider the problem of minimizing transmission energy in wireless sensor networks by taking into account that every sensor may require a different bit rate and reliability according to its particular application. We propose a cross-layer approach to tackle such a minimization in centralized networks for the total transmission energy consumption of the network: in the physical layer, for each sensor the sink estimates the channel gain and adaptively selects a modulation scheme; in the MAC layer, each sensor is correspondingly assigned a number of time slots. The modulation level and the number of allocated time slots for every sensor are constrained to attain their applications bit rates in a global energy-efficient manner. The signal-to-noise ratio gap approximation is used in our exposition in order to jointly handle required bit rates, transmission energies, and symbol error rates.
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Garzás, J.J.E., Calzón, C.B. & Armada, A.G. An Energy-Efficient Adaptive Modulation Suitable for Wireless Sensor Networks with SER and Throughput Constraints. J Wireless Com Network 2007, 041401 (2007) doi:10.1155/2007/41401
- Wireless Sensor Network
- Time Slot
- Modulation Scheme
- Channel Gain
- Transmission Energy