NDLI: Energy-efficient bi-directional visible light communication using thin-film corner cube retroreflector for self-sustainable IoT

Content Provider	IET Digital Library
Author	Chellam, Jenila Jeyachitra, Ramasamy Kandasamy
Abstract	This study presents the design and analysis of energy-efficient visible light communication-based downlink and uplink using a thin-film corner cube retroreflector (TCCR). The uplink establishment from the user device (UD) to base station (BS) is achieved with the retroreflection of the downlink light beams using TCCR in UD. It eliminates the requirement of active optical source in the UD that reduces the power consumption for communication from the battery-constrained devices. Additionally, the photoelectric effect-based energy harvesting from lighting sources is also incorporated in the UD. By utilising the thin-film deposition of photosensitive alkali metals Na, K, Rb, and Cs, light energy has been harvested, and the harvested energy is utilised in the UD for the uplink modulation process. It makes the real self-sustainable communication towards the battery-less execution of internet of things (IoT). The proposed system offers the downlink and uplink for the distance of 2.15 m with the data rates of 10 Gbps and 1 kbps, respectively. The maximum harvested energy from the 18 W optical source by using the 100 nm Cs-TCCR is 104.40 µJ, and it can serve the energy consumption of the uplink modulator to transmit the UD data to the BS.
Starting Page	223
Ending Page	233
Page Count	11
ISSN	17518768
Volume Number	14
e-ISSN	17518776
Issue Number	Issue 5, Oct (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-opt/14/5
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-opt.2019.0086
Journal	IET Optoelectronics
Publisher Date	2020-03-31
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Battery-constrained Device Downlink Light Beam Retroreflection Energy 104.4 MuJ Energy Conservation Energy Harvesting Energy-efficient Bidirectional Visible Light Communication Free Space Optical Communication Free Space Optical Link Internet of Things Light Energy Harvesting Optical Communication Equipment Photoelectric Effect-based Energy Harvesting Photoelectricity Photosensitive Alkali Metals Power 18.0 W Retroreflectors Self-sustainable IoT TCCR Telecommunication Power Management Thin-film Corner Cube Retroreflector Thin-film Deposition
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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