IPv6 based routing in building automation network

Building automation technology has got great improvement by the Internet of Things and Web of Things appearance. Internet of Things allows all devices to be IP enabled and be accessible through the Internet in buildings. Specific protocol stack has been standardized suitable for resource constrained devices. Now these kinds of devices are capable to connect to the Internet directly and can serve light weight web services. Routing Protocol for Low Power and Lossy Networks (RPL) is an IPv6 routing protocol designed to be used in the network of constrained devices attending in the Internet of Things. RPL route construction process is configurable through Objective Function (OF). OF formulates Nodes and link metrics to calculate nodes' Rank which numerates the quality of a route that a node provides. In this paper a Compound Metric Objective Function (CMOF) is proposed and evaluated with Minimum Rank with Hysteresis Objective Function (MRHOF). CMOF is designed to satisfy building automation application requirements and provide a reliable and low latency communication. The proposed objective function operates based on hop count and link latency metrics. Simulation results approve the superiority of CMOF in terms of packet delivery ratio and average end-to-end delay.