An Energy-Efficient Adaptive Modulation Suitable for Wireless Sensor Networks with SER and Throughput Constraints
| Autor: | J. Joaquín Escudero Garzás, Carlos Bousoño Calzón, Ana García Armada |
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| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: | |
| Zdroj: | EURASIP Journal on Wireless Communications and Networking, Vol 2007 (2007) |
| Druh dokumentu: | article |
| ISSN: | 1687-1472 1687-1499 |
| DOI: | 10.1155/2007/41401 |
| Popis: | 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. |
| Databáze: | Directory of Open Access Journals |
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