NDLI: Best beam selection and PHY switching policy for hybrid FSO/RF inter-satellite communication link

Content Provider	IET Digital Library
Author	Apoorva Bitragunta, Sainath Nitundil, Sumukh
Abstract	Free space optical (FSO) inter-satellite links could often be non-reliable due to the imperfect line of sight (LOS) links. To achieve more reliable communication, the authors propose hybrid inter-satellite links. However, this leads to new challenges like switching physical (PHY) layers at the satellite's transmitter. In this work, they propose a novel hybrid radio frequency-FSO (RF/FSO) satellite system. For it, they develop a novel best beam selection policy (BBSP) and switching of FSO and RF to improve the reliability of the inter-satellite links. To obtain more insights, they investigate the performance of BBSP by deriving expressions for the outage probability, average spectral efficiency, and average bit error rate of the BBSP. For the PHY switching, they compare the instantaneous error probabilities of RF and FSO links and find the signal-to-noise ratio threshold at which it is more efficient to switch to RF. They further improve this threshold by considering a satellite transmitting multiple beams and choosing the best source beam. To validate the analytical findings, they simulate the proposed model with CubeSat level parameters. They and that the BBSP delivers superior performance in terms of various performance measures, which shows its applicability in next-generation satellite systems.
Starting Page	3350
Ending Page	3362
Page Count	13
ISSN	17518628
Volume Number	14
e-ISSN	17518636
Issue Number	Issue 19, Dec (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/14/19
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2020.0515
Journal	IET Communications
Publisher Date	2020-09-09
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Average Bit Error Rate BBSP Best Beam Selection Policy Best Source Beam CubeSat Level Parameter Error Statistics Free Space Optical Communication Free Space Optical Inter-satellite Link Free Space Optical Link FSO FSO Link Hybrid FSO-RF Inter-satellite Communication Link Hybrid Inter-satellite Link Imperfect Line of Sight Link Instantaneous Error Probabilities Inter-satellite Link Reliability Multiplexing And Switching in Optical Communication Next-generation Satellite System Nonreliable Link Novel Hybrid Radio Frequency-FSO Satellite System Outage Probability PHY PHY Switching PHY Switching Policy Physical Layer Reliability Reliable Communication Satellite Communication System Satellite Link Satellite Transmitter Signal-to-noise Ratio Threshold Statistics Telecommunication Network Reliability Telecommunication Switching
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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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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