Abstract
RPL (IPv6 routing protocol for low power and lossy networks) proposed by the IETF (Internet Engineering Task Force) ROLL (routing over low-power and lossy networks) working group is a de facto standard routing protocol for IoT environments. Since the standardization was proposed, RPL has been extensively improved for diverse application scenarios and environments. Congestion control is one of the most important reasons why RPL has been improved. In an LLN (low power and lossy network), congestion may even lead to network lifetime reduction. In resource-constrained networks where end-to-end congestion control is not feasible, RPL should play a more crucial role in congestion control. In this survey, we review the RPL schemes proposed for congestion control and load-balancing and discuss future research directions.
Highlights
IntroductionIoT (Internet of Things) is one of the key technologies enabling the industrial revolution
IoT (Internet of Things) is one of the key technologies enabling the industrial revolution.As the IoT industry evolves rapidly, IoT standardization has been done by more than 100 working groups over the world
We reviewed the research literature on congestion control and load balancing in RPL
Summary
IoT (Internet of Things) is one of the key technologies enabling the industrial revolution. As the IoT industry evolves rapidly, IoT standardization has been done by more than 100 working groups over the world. The IETF (Internet Engineering Task Force) has many working groups (WGs) focusing on IoT standardization for resource-constrained devices and networks. The 6lo (IPv6 over networks of resource-constrained Nodes) WG defines methods for adapting IPv6 to constrained node networks. The ROLL (routing over low-power and lossy networks) WG focuses on routing issues for resource-constrained devices. The CoRE (constrained restful environments) WG was chartered to provide a framework for resource-oriented applications intended to run on constrained
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