Resumo

HERNANDEZ ONTIVEROS, Juan Miguel et al. 802.15.4 MAC protocol applied to efficient energy consumption. Ing. Investig. [online]. 2010, vol.30, n.1, pp.71-74. ISSN 0120-5609.

This work focused on the problem of finding a suitable medium access control protocol so that the nodes of a given cluster could communicate efficiently within their respective activity window. The nodes thus saved energy by turning off their transceivers during the time that they did not have to exchange information. This work´s main objective was to ensure that the nodes were mainly focused on energy efficiency and delivering packages, taking quality of service (QoS) requirements into account and comparing their performance to an existing protocol called sensor medium access control (S-MAC). The parameters being compared were the time that the nodes were asleep, energy consumption and average delay. This work was completed by using the OPNET simulator tool (OPNET Modeler, version 11.5.A PL3, OPNET Technologies Company Inc). This approach greatly improved the “PCF + Sleep”  performance proposed in this work over the earlier S-MAC.

Palavras-chave : wireless sensor networks (WSN); medium access control (MAC) protocol; quality of service (QoS); energy efficiency.

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