Resumo

CAMACHO-ESCOTO, José-Jaime et al. Energy-Efficient Medium Access Control Using Distributed Hash-based Elections. Comp. y Sist. [online]. 2017, vol.21, n.1, pp.91-100. ISSN 2007-9737.  https://doi.org/10.13053/cys-21-1-2477.

In this paper we introduce the Energy-Efficient Multiple Access (EE-MA) protocol for wireless networks where nodes participate in a distributed election to gain interference-free access to the wireless channel. By taking advantage of the information used in the distributed elections, nodes can infer if they are not the intended receiver of a transmission and set their radios in sleeping state to save energy. To save even more energy and avoid false positives derived from the nature of the protocol, EE-MA also implements a sleeping scheme where nodes switch to the sleeping state if no message is received during the beginning of a time-slot. We show that the individual channel access plans computed by the proposed distributed algorithm are collision-free at the intended receivers and that intended receivers are always in receiving state. We also present a simulation-based performance analysis that shows that EE-MA outperforms a state of the art election-based channel access protocol in terms of energy efficiency with no cost in terms of network capacity. Simulations also show that EE-MA outperforms 802.11 contention based protocol in terms of goodput and channel access delay.

Palavras-chave : Energy efficiency; medium access control; wireless networks; distributed elections.

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