RPL enhancement using a new objective function based on combined metrics
Hanane Lamaazi, Nabil Benamar · 2017
The routing protocol for low-power and lossy networks (RPL) defines an objective function (OF) to choose the optimal route toward destination. OF can operate according to a set of metrics and constraints used in a single or combined way. The use of a single metric in the OF can improve routing performances while degrades others. To overcome these limitations, we present in this paper a new approach to enhance the RPL routing protocol. We propose OF-EC (objective function based combined metric using fuzzy logic method), a new objective function that considers both link and node metrics, namely ETX (expected transmission count), HC (hop count) and EC (energy consumption) based on fuzzy logic concepts. Our results show that the new OF-EC in comparison to the OF based ETX and OF based energy consumption only and OF_FUZZY allows improving RPL performances in terms of PDR and overhead. In addition, this new metric allows equalizing the energy consumption of nodes throughout the network.