Objective function based routing protocol to improve the quality of service in industrial internet of things

Abstract

Wireless Sensor Networks (WSN) consists of small sensing devices newlinecalled sensors used to monitor and gather information from real-time newlineenvironments. As the sensors are not connected to the internet they cannot newlineprovide information to the users or act on the environment. This scenario results newlinein the emergence of a new technology called the Internet of Things (IoT). IoT is newlinemade up of uniquely addressable low-power devices deployed in an environment newlineto form a Low-power and Lossy Network (LLN). Reliable and energy efficient newlinecommunication between the devices deployed in applications like industries, newlineforest fire monitoring, health care, home automation is necessary for the newlineefficiency of real-time IoT applications. It can be achieved by an efficient newlinerouting protocol. The routing protocol strives to find the reliable path from the newlinesource to the destination for data transmission with good Quality of Service newline(QoS) and energy efficiency. newlineThe Routing Protocol for Low-power and Lossy Networks (RPL) is newlineone of the recommended routing protocols for LLN. RPL uses two objective newlinefunctions, Objective Function Zero (OF 0) and Minimum Rank with Hysteresis newlineObjective Function (MRHOF) to select the optimal path for communication. newlineThe design of the objective functions OF 0 and MRHOF is based on the node newlinemetric hop-count and the link metric Expected Transmission count (ETX). newlineThe sensors deployed in the real-time applications must quickly sense, analyze, newlineand react to the data within a time frame, so QoS and energy efficiency are newlineimportant qualities required for data communication. The QoS depends on the newlinemeasures of throughput, packet delivery ratio and latency. But the metrics newlinehop-count and ETX are not sufficient to achieve QoS and energy efficient newlinerouting. newline