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A reinforcement learning-based link quality estimation strategy for RPL and its impact on topology management - 2017

Research Area:  Internet of Things

Abstract:

Over the last few years, standardisation efforts are consolidating the role of the Routing Protocol for Low-Power and Lossy Networks (RPL) as the standard routing protocol for IPv6-based Wireless Sensor Networks (WSNs). Although many core functionalities are well defined, others are left implementation dependent. Among them, the definition of an efficient link-quality estimation (LQE) strategy is of paramount importance, as it influences significantly both the quality of the selected network routes and nodes energy consumption. In this paper, we present RL-Probe, a novel strategy for link quality monitoring in RPL, which accurately measures link quality with minimal overhead and energy waste. To achieve this goal, RL-Probe leverages both synchronous and asynchronous monitoring schemes to maintain up-to-date information on link quality and to promptly react to sudden topology changes, e.g. due to mobility. Our solution relies on a reinforcement learning model to drive the monitoring procedures in order to minimise the overhead caused by active probing operations. The performance of the proposed solution is assessed by means of simulations and real experiments. Results demonstrated that RL-Probe helps in effectively improving packet loss rates, allowing nodes to promptly react to link quality variations as well as to link failures due to node mobility.

Author(s) Name:  EmilioAncillotti,Carlo Vallati,Raffaele Bruno and Enzo Mingozzi

Journal name:  Computer Communications

Conferrence name:  

Publisher name:  ELSEVIER

DOI:  10.1016/j.comcom.2017.08.005

Volume Information:  Volume 112, 1 November 2017, Pages 1-13