Journal
SENSORS
Volume 12, Issue 6, Pages 6837-6856Publisher
MDPI
DOI: 10.3390/s120606837
Keywords
underwater sensor networks; wireless sensor networks; acoustic modems; wake-up; underwater MAC
Funding
- Diseno, Evaluacion e Implementacion de una Red Subacuatica de Sensores-Ministerio de Educacion y Ciencia [DPI2007-66796-C03-01]
- Investigacion basica fundamental sobre tecnologias constitutivas de un sistema de red inalambrica de sensores y su aplicacion para el desarrollo de una plataforma de redes inalambricas de sensores-Ministerio de Ciencia e Innovacion [PET2008-0011]
- Sonorizacion ambiental subacuatica para la inspeccion y monitorizacion de explotaciones de acuicultura marina-Ministerio de Ciencia e Innovacion [CTM2011-29691-C02-01]
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This paper is focused on the description of the physical layer of a new acoustic modem called ITACA. The modem architecture includes as a major novelty an ultra-low power asynchronous wake-up system implementation for underwater acoustic transmission that is based on a low-cost off-the-shelf RFID peripheral integrated circuit. This feature enables a reduced power dissipation of 10 mu W in stand-by mode and registers very low power values during reception and transmission. The modem also incorporates clear channel assessment (CCA) to support CSMA-based medium access control (MAC) layer protocols. The design is part of a compact platform for a long-life short/medium range underwater wireless sensor network.
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