ODM-RPL: Optimized Dual MOP RPL

Nowadays, small objects endowed with a communication device are collaborating to execute specific tasks. Due to their large number and limited capabilities, they are being supported by Low Power and Lossy Networks (LLNs). LLNs are often used in data collection oriented applications in which nodes collect data and forward it to a border router using the RPL protocol. RPL is a standard routing protocol which has been especially designed for LLNS. To introduce more interoperability and flexibility in RPL, DUAL-MOP RPL has been designed, thus enabling nodes having different Modes Of Operations (MOPs) to function in the same network. However, to solve the long source header problem, in DUAL-MOP RPL, a large number of source routing operations are being executed which conducts to a high processing load. To tackle this issue, we introduce in this paper an extension of DUAL-MOP RPL called ODM-RPL that proposes a trade-off between the source routing header length and the storing nodes' processing load by first optimizing the source routing header and introducing a concept of preferred source routing header maximum length. The simulations results show the effectiveness of our solution in terms of performances.