Title: Reliable wireless MAC layer for industrial internet of things using polarisation diversity

Authors: Ritesh Kumar Kalle

Addresses: Hitachi India Pvt. Ltd., Unit No. S 704, 7th floor, World Trade Center, No. 26/1, Malleswaram, Bangalore, 560-055, India

Abstract: Industrial internet of things (IIoT) requires superior reliability from underlying communication technology that consumer wireless technologies often fail to meet. Utilising polarisation diversity techniques through rotating polarisation waves (RPWs) have been recently proposed to improve the coverage and reliability of IIoT network. However, the design of medium access (MAC) layer that optimally utilises the key features of the underlying physical layer is a key challenge especially when considering multihop networks. Adopting conventional MAC protocols based on carrier sensing or time division alone would not utilise the physical layer in its optimal manner leading to lower throughput and higher end-to-end latency. In this paper, novel medium access techniques to improve the reliability in the RPW wireless communication have been described. We also consider extensions to the MAC layer to support multihop network using the tree topology. An overview of MAC layer methods and comparative mathematical analysis is provided that clearly show the benefits of multi-hop RPW over conventional networks.

Keywords: IoT; reliable wireless network; polarisation diversity; orthogonal code; packet combination; priority; multihop; tree topology; transmission airtime.

DOI: 10.1504/IJDET.2018.092636

International Journal of Digital Enterprise Technology, 2018 Vol.1 No.1/2, pp.96 - 120

Received: 28 Jun 2017
Accepted: 21 Oct 2017
Published online: 26 Jun 2018 *