Aquacom: Underwater Visible Light Communication

This was presented at Indiacom 2018 Conference.
I. Janveja, N. Garg , C. Chawla, J. Parikh, "Aquacom: Underwater Visible Light Communication," The 12th IEEE INDIAcom, 2018

Transcript

1. AQUACOM Underwater Visible Light Communication Presented by Chetan Chawla 1 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
2. Table of Contents Visible Light Communication Introduction Applications of VLC with special focus on Underwater communication AQUACOM System Design Experimental Results Concluding Remarks 2 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
3. Table of Contents Visible Light Communication Introduction Applications of VLC with special focus on Underwater communication AQUACOM System Design Experimental Results Concluding Remarks 3 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
4. Table of Contents Visible Light Communication Introduction Applications of VLC with special focus on Underwater communication AQUACOM System Design Experimental Results Concluding Remarks 4 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
5. Visible Light Communication Introduction • Visible Light Communication (VLC) is a data communication variant that uses visible light between 400 and 800THz (780-370 nm) • This technology exploits the high switching rates offered by the light emitting diodes. 5 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
6. Introduction • Visible Light Communication (VLC) is a data communication variant that uses visible light between 400 and 800THz (780-370 nm) • This technology exploits the high switching rates offered by the light emitting diodes. Visible Light Communication 6 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
7. Applications • Internet anywhere: street lamps, light of vehicles can be used to access internet anywhere in footpaths, roads, malls, anywhere where light source is available. • Health sector: Since WIFI is not safe to be used in hospitals and other various health care sectors because it penetrates human body. LIFI can be implemented and well suit in this sector. • Underwater communications: Since radio waves cannot be used under water because these waves are strongly absorbed by sea water within feet of their transmission and this renders it unusable underwater but LIFI is suitable for underwater communication Visible Light Communication 7 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
8. Applications • Internet anywhere: street lamps, light of vehicles can be used to access internet anywhere in footpaths, roads, malls, anywhere where light source is available. • Health sector: Since WIFI is not safe to be used in hospitals and other various health care sectors because it penetrates human body. LIFI can be implemented and well suit in this sector. • Underwater communications: Since radio waves cannot be used under water because these waves are strongly absorbed by sea water within feet of their transmission and this renders it unusable underwater but LIFI is suitable for underwater communication Visible Light Communication 8 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
9. Applications • Internet anywhere: street lamps, light of vehicles can be used to access internet anywhere in footpaths, roads, malls, anywhere where light source is available. • Health sector: Since WIFI is not safe to be used in hospitals and other various health care sectors because it penetrates human body. LIFI can be implemented and well suit in this sector. • Underwater communications: Since radio waves cannot be used under water because these waves are strongly absorbed by sea water within feet of their transmission and this renders it unusable underwater. Acoustic techniques make a better approach thereby. But they are unstable near the surface where it experiences a gradient. Hence we propose the use of visible light as a means of communication underwater. Visible Light Communication 9 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
10. AQUACOM : Underwater Visible Light Communication Overview • A device for establishing wireless communication underwater between divers, explorers, etc. • Near-field communication up-to 2 meters. • Prototyped using Raspberry Pi 3 Model B as the processing unit. • Data rate upto 300bps achieved during experimental tests. 10 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
11. AQUACOM : Underwater Visible Light Communication Overview • A device for establishing wireless communication underwater between divers, explorers, etc. • Near-field communication up-to 2 meters. • Prototyped using Raspberry Pi 3 Model B as the processing unit. • Data rate upto 300bps achieved during experimental tests. 11 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
12. AQUACOM : Underwater Visible Light Communication Overview • A device for establishing wireless communication underwater between divers, explorers, etc. • Near-field communication up-to 2 meters. • Prototyped using Raspberry Pi 3 Model B as the processing unit. • Data rate upto 300bps achieved during experimental tests. 12 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
13. AQUACOM : Underwater Visible Light Communication Overview • A device for establishing wireless communication underwater between divers, explorers, etc. • Near-field communication up-to 2 meters. • Prototyped using Raspberry Pi 3 Model B as the processing unit. • Data rate upto 300bps achieved during experimental tests. 13 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
14. AQUACOM : Underwater Visible Light Communication Overview • A device for establishing wireless communication underwater between divers, explorers, etc. • Near-field communication up-to 2 meters. • Prototyped using Raspberry Pi 3 Model B as the processing unit. • Data rate upto 300bps achieved during experimental tests. 14 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
15. System Design AQUACOM : Underwater Visible Light Communication 15 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
16. System Design The following basic units are packed together as a waterproofed device that can be used underwater for communication : • Input Unit : A 4x4 keyboard that takes the message to be transmitted as input. • Transceiver : LEDs for transmitting and photodiode array for receiving data. • Output unit : An LCD screen for displaying or a speaker for sounding the received messages. • Processing Unit : Processes data (transmitted and received) as per the UART protocols and works as a black-box between the other units. AQUACOM : Underwater Visible Light Communication 16 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
17. System Design The following basic units are packed together as a waterproofed device that can be used underwater for communication : • Input Unit : A 4x4 keyboard that takes the message to be transmitted as input. • Transceiver : LEDs for transmitting and photodiode array for receiving data. • Output unit : An LCD screen for displaying or a speaker for sounding the received messages. • Processing Unit : Processes data (transmitted and received) as per the UART protocols and works as a black-box between the other units. AQUACOM : Underwater Visible Light Communication 17 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
18. System Design The following basic units are packed together as a waterproofed device that can be used underwater for communication : • Input Unit : A 4x4 keyboard that takes the message to be transmitted as input. • Transceiver : LEDs for transmitting and photodiode array for receiving data. • Output unit : An LCD screen for displaying or a speaker for sounding the received messages. • Processing Unit : Processes data (transmitted and received) as per the UART protocols and works as a black-box between the other units. AQUACOM : Underwater Visible Light Communication 18 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
19. System Design The following basic units are packed together as a waterproofed device that can be used underwater for communication : • Input Unit : A 4x4 keyboard that takes the message to be transmitted as input. • Transceiver : LEDs for transmitting and photodiode array for receiving data. • Output unit : An LCD screen for displaying or a speaker for sounding the received messages. • Processing Unit : Processes data (transmitted and received) as per the UART protocols and works as a black-box between the other units. AQUACOM : Underwater Visible Light Communication 19 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
20. System Design The following basic units are packed together as a waterproofed device that can be used underwater for communication : • Input Unit : A 4x4 keyboard that takes the message to be transmitted as input. • Transceiver : LEDs for transmitting and photodiode array for receiving data. • Output unit : An LCD screen for displaying or a speaker for sounding the received messages. • Processing Unit : Processes data (transmitted and received) as per the UART protocols and works as a black-box between the other units. AQUACOM : Underwater Visible Light Communication 20 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
21. Experimental Results 1. Transmitter - LEDs vs Laser diodes • LED : Data Rate = 300bps Distance Range = 1-2 meters • Laser Diode : Data Rate = 400bps Distance Range = 3-4 meters Laser diode transmitter requires precise aligning before the receiver. Therefore, LED transmitter was chosen. AQUACOM : Underwater Visible Light Communication 21 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
22. Experimental Results 1. Transmitter - LEDs vs Laser diodes • LED : Data Rate = 300bps Distance Range = 1-2 meters • Laser Diode : Data Rate = 400bps Distance Range = 3-4 meters Laser diode transmitter requires precise aligning before the receiver. Therefore, LED transmitter was chosen. AQUACOM : Underwater Visible Light Communication 22 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
23. Experimental Results 1. Transmitter - LEDs vs Laser diodes • LED : Data Rate = 300bps Distance Range = 1-2 meters • Laser Diode : Data Rate = 400bps Distance Range = 3-4 meters Laser diode transmitter requires precise aligning before the receiver. Therefore, LED transmitter was chosen. AQUACOM : Underwater Visible Light Communication 23 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
24. Experimental Results 1. Transmitter - LEDs vs Laser diodes • LED : Data Rate = 300bps Distance Range = 1-2 meters • Laser Diode : Data Rate = 400bps Distance Range = 3-4 meters Laser diode transmitter requires precise aligning before the receiver. Therefore, LED transmitter was chosen. AQUACOM : Underwater Visible Light Communication 24 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
25. Experimental Results 2. Receiver - Photodiodes vs Photo-resistors (LDR) AQUACOM : Underwater Visible Light Communication Property under observantion PHOTODIODES PHOTO-RESISTORS Response Time High Low Maximum achievable Baud Rate High Low 25 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
26. Experimental Results 2. Receiver - Photodiodes vs Photo-resistors (LDR) AQUACOM : Underwater Visible Light Communication Property under observantion PHOTODIODES PHOTO-RESISTORS Response Time High Low Maximum achievable Baud Rate High Low 26 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
27. Experimental Results 2. Receiver - Photodiodes vs Photo-resistors (LDR) AQUACOM : Underwater Visible Light Communication Property under observantion PHOTODIODES PHOTO-RESISTORS Response Time High Low Maximum achievable Baud Rate High Low 27 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
28. Experimental Results 2. Receiver - Photodiodes vs Photo-resistors (LDR) AQUACOM : Underwater Visible Light Communication Property under observantion PHOTODIODES PHOTO-RESISTORS Response Time High Low Maximum achievable Baud Rate High Low 28 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
29. Experimental Results 2. Receiver - Photodiodes vs Photo-resistors (LDR) AQUACOM : Underwater Visible Light Communication Property under observantion PHOTODIODES PHOTO-RESISTORS Response Time High Low Maximum achievable Baud Rate High Low 29 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
30. Concluding Remarks With the recent uproar in the field of communication about LiFi, the area has been leveraged with significant research being done in the area. It might not be a feasible idea to replace the entire existent infrastructure to incorporate light as a medium of communication by replacing existent wireless RF systems. However, visible light communication can establish itself as a standard where the standard RF systems fail. This is what we aimed to do with AQUACOM for underwater communication. 30 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
31. Future Scope Aquacom can be used as a framework for a number of applications for underwater communication. In addition to the communication application for divers, it can be used as a form of communication in various underwater vehicles. Visible light has benefits over both RF communication (Strong absorption) and Acoustic techniques. They also have application to replace the existing light house technology. 31 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh
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34. Thank You. 34 Indiacom’18 I Janveja, N Garg, C Chawla, J Parikh chchawla@yahoo.co.in