Improving network lifetime and reliability in internet of things

Abstract

The Internet of Things (IoT) is the next revolution that will change the way we newlinecommunicate and interact with our environment. Low-power wireless sensors are newlinethe most important components towards the realization of IoT due to their ease of newlinedeployment and infrastructure-less operation. The wireless sensor nodes are newlineconstrained in power, memory, and bandwidth, and are mainly battery operated newlinedevices. The lightweight on-demand ad-hoc distance-vector - next generation newline(LOADng) is a reactive routing protocol proposed for low-power and lossy networks newline(LLNs). ITU-T G.9903 standard for power line communication specifies LOADng newlineas its default routing protocol. LOADng establishes bidirectional routes and has newlinerouting mechanisms for unicast, multicast and broadcast packets. newlineThe main objective of this thesis is to improve the reliability and network newlinelifetime of LOADng based LLNs. An energy and bandwidth efficient multipath newlinerouting scheme is proposed based on LOADng. It has reduced energy consumption newlineand communication overhead in terms of the number and size of the control packets newlinegenerated. An analytical model for evaluating its energy overhead and newlinecommunication overhead is developed. The analytical results are verified via newlinesimulations using the LOADng simulation module. This simulation module is newlinedeveloped using the generic framework proposed in this thesis. The generic newlineframework proposed for implementation of on-demand routing protocols is newlineextensible, in the sense that new features can be added to the basic module. Further, newlinea new composite route metric, namely LRRE is proposed. The LRRE composite newlineroute metric combines the residual energy, live route count, and the hop-count newlinemetrics. The LRRE metric is integrated with LOADng simulation module, and the newlineresults show that the proposed composite metric improves the packet delivery ratio newline(PDR) and network lifetime. It also reduces the energy wastage. newline