A survey on Mobility Under RPL Routing Protocol

The Internet of Things (IoT) is primarily based on constrained devices in memory which are connected by lossy links. These networks are commonly known as Low-power and Lossy Networks (LLNs). Few years ago, the IPv6 Routing Protocol for Low-power and Lossy Networks (RPL) was proposed by IETF as the routing standard designed for LLNs in which both nodes and their interconnects are constrained. Many Applications in IoT need a support of routing for mobile nodes. However, RPL have a slow response to topology changes. In fact, it is necessary to make a modification for RPL to support the mobility of IoT devices in the network. In this context, many improvements have been made in order to make RPL suitable for mobility in multiple use cases. We aim to provide an insight into relevant recent works around RPL protocol under mobility. We highlighted the factors and parameters affected, the scenario and the gain of each studied solution. We draw also some lessons learned and gave useful guidelines for future developments.