Mais uma nova sigla para nossa “sopa de letrinhas”: WSAN.

WSAN significa Wireless Sensor and Actor Networks (Redes de Sensores e Atores sem fio).

Essas redes são capazes de observar o mundo físico, processar dados, tomar decisões baseadas nas observações realizadas e realizar ações apropriadas.Atores (ou atuadores) são as entidades que agem na rede.

Mas qual a diferença de uma WSAN para uma WSN (Wireless Sensor Network), já que as duas usam sensores em rede sem fio?

Vejamos algumas diferenças:

• Enquanto sensores são pequenos, baratos, e possuem capacidade limitada de processamento e comunicação, os atores são nós ricos (em recursos), equipados com processadores melhores e com maior tempo de vida.

• Em uma WSN, o número de sensors pode chegar a milhões. Numa WSAN, devido a diferentes requisitos de cobertura e métodos de interação, o número de atores é bem menor do que de sensores.

• Em uma WSAN é necessário ter mecanismos de coordenação de distribuição local entre sensores e atuadores.

Vejam algumas sugestões de leitura:

·         Ian F. Akyildiz, Ismail H. Kasimoglu, Wireless sensor and actor networks: research challenges. Ad Hoc Networks 2 (2004) 351–367.

·         Wireless Sensor and Actor Networks (WSAN), em http://www.ece.gatech.edu/research/labs/bwn/actors/.

·         Everything You Always Wanted to Know About Sensor/Actuator Networks But Were Afraid to Ask. Em http://icapeople.epfl.ch/iaad/teaching/SC001C/WSAN.pdf

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