Sigma Routing Metric for RPL Protocol
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Fecha
2018-04
Autores
Sanmartin, Paul
Rojas, Aldo
Fernandez, Luis
Avila, Karen
Jabba, Daladier
Valle, Sebastian
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Editor
MDPI.
Resumen
This paper presents the adaptation of a specific metric for the RPL protocol in the objective
function MRHOF. Among the functions standardized by IETF, we find OF0, which is based on
the minimum hop count, as well as MRHOF, which is based on the Expected Transmission Count
(ETX). However, when the network becomes denser or the number of nodes increases, both OF0
and MRHOF introduce long hops, which can generate a bottleneck that restricts the network.
The adaptation is proposed to optimize both OFs through a new routing metric. To solve the above
problem, the metrics of the minimum number of hops and the ETX are combined by designing a new
routing metric called SIGMA-ETX, in which the best route is calculated using the standard deviation
of ETX values between each node, as opposed to working with the ETX average along the route.
This method ensures a better routing performance in dense sensor networks. The simulations are
done through the Cooja simulator, based on the Contiki operating system. The simulations showed
that the proposed optimization outperforms at a high margin in both OF0 and MRHOF, in terms of
network latency, packet delivery ratio, lifetime, and power consumption.
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Palabras clave
LLN, RPL, Objective function, Routing metric