A Survey on Hybrid Free Space Optical and Radio Frequency Systems: Classification, Progress, Observations, and Challenges

<p dir="ltr">Data rate, security, spectral efficiency, energy efficiency and reliability represent the main requirements in most of communication systems. Different wireless technologies can achieve different levels of these requirements, where a specific wireless technology cannot i...

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Main Author: Heyam Hassan (22466887) (author)
Other Authors: Saud Althunibat (16888722) (author), Amneh Al-Mbaideen (22466890) (author), Mazen Hasna (16904661) (author), Khalid A. Qaraqe (16904664) (author)
Published: 2025
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author Heyam Hassan (22466887)
author2 Saud Althunibat (16888722)
Amneh Al-Mbaideen (22466890)
Mazen Hasna (16904661)
Khalid A. Qaraqe (16904664)
author2_role author
author
author
author
author_facet Heyam Hassan (22466887)
Saud Althunibat (16888722)
Amneh Al-Mbaideen (22466890)
Mazen Hasna (16904661)
Khalid A. Qaraqe (16904664)
author_role author
dc.creator.none.fl_str_mv Heyam Hassan (22466887)
Saud Althunibat (16888722)
Amneh Al-Mbaideen (22466890)
Mazen Hasna (16904661)
Khalid A. Qaraqe (16904664)
dc.date.none.fl_str_mv 2025-04-18T12:00:00Z
dc.identifier.none.fl_str_mv 10.1109/access.2025.3558500
dc.relation.none.fl_str_mv https://figshare.com/articles/journal_contribution/A_Survey_on_Hybrid_Free_Space_Optical_and_Radio_Frequency_Systems_Classification_Progress_Observations_and_Challenges/30405736
dc.rights.none.fl_str_mv CC BY 4.0
info:eu-repo/semantics/openAccess
dc.subject.none.fl_str_mv Engineering
Communications engineering
Electronics, sensors and digital hardware
Free space optics
radio frequency
millimeter waves
terahertz
hybrid schemes
mixed schemes
Surveys
Wireless communication
Security
Reliability
Switches
Meteorology
Internet of Things
Free-space optical communication
dc.title.none.fl_str_mv A Survey on Hybrid Free Space Optical and Radio Frequency Systems: Classification, Progress, Observations, and Challenges
dc.type.none.fl_str_mv Text
Journal contribution
info:eu-repo/semantics/publishedVersion
text
contribution to journal
description <p dir="ltr">Data rate, security, spectral efficiency, energy efficiency and reliability represent the main requirements in most of communication systems. Different wireless technologies can achieve different levels of these requirements, where a specific wireless technology cannot individually attain the best performance in all of these system requirements. Free-Space Optical (FSO) and Radio Frequency (RF) communications are fundamental and popular wireless technologies. Although FSO systems can achieve high data rates, maintain high security levels and minimize energy consumption, they suffer from low reliability in some weather conditions (such as fog and haze), require Line-of-Sight (LoS) connections, and are limited to point-to-point communication systems. On the other hand, RF technology has been shown as a reliable system under diverse weather conditions, allows for users and data multiplexing and represents an efficient option for non-LoS communication scenarios. However, compared to FSO, the achievable data rate and security level by RF are limited. To this end, combining both technologies (i.e., FSO and RF) has been widely nominated as an efficient hybrid communication system that exploits the advantages of both technologies in different scenarios and conditions. In the literature, a wide set of hybrid FSO/RF systems has been presented to accomplish different objectives including improving throughput, boosting reliability, maintaining connectivity and enhancing security. This survey paper provides a comprehensive overview of hybrid FSO/RF systems, presenting a classification framework of the different hybrid setups proposed in the literature, and identifying the main design objectives of hybrid FSO/RF systems. The survey includes technical revisions of related literature, followed by a set of the observations made and another set of challenges and open issues in the field of hybrid FSO/RF systems.</p><h2>Other Information</h2><p dir="ltr">Published in: IEEE Access<br>License: <a href="https://creativecommons.org/licenses/by/4.0/deed.en" target="_blank">https://creativecommons.org/licenses/by/4.0/</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.1109/access.2025.3558500" target="_blank">https://dx.doi.org/10.1109/access.2025.3558500</a></p>
eu_rights_str_mv openAccess
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identifier_str_mv 10.1109/access.2025.3558500
network_acronym_str Manara2
network_name_str Manara2
oai_identifier_str oai:figshare.com:article/30405736
publishDate 2025
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spelling A Survey on Hybrid Free Space Optical and Radio Frequency Systems: Classification, Progress, Observations, and ChallengesHeyam Hassan (22466887)Saud Althunibat (16888722)Amneh Al-Mbaideen (22466890)Mazen Hasna (16904661)Khalid A. Qaraqe (16904664)EngineeringCommunications engineeringElectronics, sensors and digital hardwareFree space opticsradio frequencymillimeter wavesterahertzhybrid schemesmixed schemesSurveysWireless communicationSecurityReliabilitySwitchesMeteorologyInternet of ThingsFree-space optical communication<p dir="ltr">Data rate, security, spectral efficiency, energy efficiency and reliability represent the main requirements in most of communication systems. Different wireless technologies can achieve different levels of these requirements, where a specific wireless technology cannot individually attain the best performance in all of these system requirements. Free-Space Optical (FSO) and Radio Frequency (RF) communications are fundamental and popular wireless technologies. Although FSO systems can achieve high data rates, maintain high security levels and minimize energy consumption, they suffer from low reliability in some weather conditions (such as fog and haze), require Line-of-Sight (LoS) connections, and are limited to point-to-point communication systems. On the other hand, RF technology has been shown as a reliable system under diverse weather conditions, allows for users and data multiplexing and represents an efficient option for non-LoS communication scenarios. However, compared to FSO, the achievable data rate and security level by RF are limited. To this end, combining both technologies (i.e., FSO and RF) has been widely nominated as an efficient hybrid communication system that exploits the advantages of both technologies in different scenarios and conditions. In the literature, a wide set of hybrid FSO/RF systems has been presented to accomplish different objectives including improving throughput, boosting reliability, maintaining connectivity and enhancing security. This survey paper provides a comprehensive overview of hybrid FSO/RF systems, presenting a classification framework of the different hybrid setups proposed in the literature, and identifying the main design objectives of hybrid FSO/RF systems. The survey includes technical revisions of related literature, followed by a set of the observations made and another set of challenges and open issues in the field of hybrid FSO/RF systems.</p><h2>Other Information</h2><p dir="ltr">Published in: IEEE Access<br>License: <a href="https://creativecommons.org/licenses/by/4.0/deed.en" target="_blank">https://creativecommons.org/licenses/by/4.0/</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.1109/access.2025.3558500" target="_blank">https://dx.doi.org/10.1109/access.2025.3558500</a></p>2025-04-18T12:00:00ZTextJournal contributioninfo:eu-repo/semantics/publishedVersiontextcontribution to journal10.1109/access.2025.3558500https://figshare.com/articles/journal_contribution/A_Survey_on_Hybrid_Free_Space_Optical_and_Radio_Frequency_Systems_Classification_Progress_Observations_and_Challenges/30405736CC BY 4.0info:eu-repo/semantics/openAccessoai:figshare.com:article/304057362025-04-18T12:00:00Z
spellingShingle A Survey on Hybrid Free Space Optical and Radio Frequency Systems: Classification, Progress, Observations, and Challenges
Heyam Hassan (22466887)
Engineering
Communications engineering
Electronics, sensors and digital hardware
Free space optics
radio frequency
millimeter waves
terahertz
hybrid schemes
mixed schemes
Surveys
Wireless communication
Security
Reliability
Switches
Meteorology
Internet of Things
Free-space optical communication
status_str publishedVersion
title A Survey on Hybrid Free Space Optical and Radio Frequency Systems: Classification, Progress, Observations, and Challenges
title_full A Survey on Hybrid Free Space Optical and Radio Frequency Systems: Classification, Progress, Observations, and Challenges
title_fullStr A Survey on Hybrid Free Space Optical and Radio Frequency Systems: Classification, Progress, Observations, and Challenges
title_full_unstemmed A Survey on Hybrid Free Space Optical and Radio Frequency Systems: Classification, Progress, Observations, and Challenges
title_short A Survey on Hybrid Free Space Optical and Radio Frequency Systems: Classification, Progress, Observations, and Challenges
title_sort A Survey on Hybrid Free Space Optical and Radio Frequency Systems: Classification, Progress, Observations, and Challenges
topic Engineering
Communications engineering
Electronics, sensors and digital hardware
Free space optics
radio frequency
millimeter waves
terahertz
hybrid schemes
mixed schemes
Surveys
Wireless communication
Security
Reliability
Switches
Meteorology
Internet of Things
Free-space optical communication