During recent years, there has been a growing interest on wireless sensor networks (WSNs) and on the opportunities opened by this technology. Since the energy consumption is a bottleneck in WSNs, reducing it has a significant impact on the applicability of this technology. Typically, the energy consumed by wireless communication and by power-hungry sensors as CMOS imagers or Gas sensors, is dominant over the power required for computation or other activities of the node. Hence, an efficient management of the resources leading to a reduction of unnecessary communication and minimizing the use of power-hungry sensor while keeping the same performance is desirable to extend the life-time of the network. In this paper we address the challenges of exploiting wake-up receivers and heterogeneous sensors in WSN applications to reduce the average power consumption of individual nodes. In particular, we show how to configure a WSN which includes Pyroelectric InfraRed (PIR) sensors, smart camera sensors and a nano-Watt wake up radio as secondary radio receiver to efficiently extend the autonomy of the system. The evaluation of the proposed approach shows a significant reduction of the activity of the primary radio and of the high power sensor while keeping the same accuracy. We prototyped and tested the nodes, and used their characterization to demonstrate through simulations the power consumption reduction and the life-time extension of the network in a typical surveillance application.
Scheda prodotto non validato
I dati visualizzati non sono stati ancora sottoposti a validazione formale da parte dello Staff di IRIS, ma sono stati ugualmente trasmessi al Sito Docente Cineca (Loginmiur).
|Titolo:||Combined methods to extend the lifetime of power hungry WSN with multimodal sensors and nanopower wakeups|
|Autori:||M., Magno; S., Marinkovic; Brunelli, Davide; L., Benini; E., Popovici|
|Titolo del volume contenente il saggio:||2012 8th International Wireless Communications and Mobile Computing Conference (IWCMC)|
|Luogo di edizione:||NY|
|Anno di pubblicazione:||2012|
|Codice identificativo Scopus:||2-s2.0-84869192719|
|Codice identificativo ISI:||WOS:000312146500019|
|Appare nelle tipologie:||04.1 Saggio in atti di convegno (Paper in proceedings)|