LiFi...

Discussion in 'Off-Topic' started by cmartinez, Nov 26, 2015.

  1. cmartinez

    Thread Starter AAC Fanatic!

    Jan 17, 2007
    3,554
    2,509
  2. spinnaker

    AAC Fanatic!

    Oct 29, 2009
    4,866
    988
    I don't see how it could be practical.
     
  3. DerStrom8

    Well-Known Member

    Feb 20, 2011
    2,428
    1,328
    Seems like a step back to me. While speeds may increase, there are plenty of downfalls. You can't use your computer to access the internet in a dark room, for example, can't use it outside, can't use it when it's bright and sunny, not to mention having to route internet cables along next to your AC power cables. I just don't think it's viable, personally.

    Matt
     
  4. spinnaker

    AAC Fanatic!

    Oct 29, 2009
    4,866
    988
    The way I understand it is each light source will be fitted with an a receiver transmitter so the light does not necessarily be on. But would that mean special lighting fitted with those devices? And how do you communicate from room to room?
     
  5. DerStrom8

    Well-Known Member

    Feb 20, 2011
    2,428
    1,328
    As I understood it the data would be transmitted by the light.
     
  6. spinnaker

    AAC Fanatic!

    Oct 29, 2009
    4,866
    988
    Then the light would need to be on? That would not be practical.
     
    djsfantasi likes this.
  7. DerStrom8

    Well-Known Member

    Feb 20, 2011
    2,428
    1,328
    My point exactly.
     
  8. cmartinez

    Thread Starter AAC Fanatic!

    Jan 17, 2007
    3,554
    2,509
    Infrared, anyone?
     
  9. DerStrom8

    Well-Known Member

    Feb 20, 2011
    2,428
    1,328
    Would still require LOS, and still would not work in a brightly-sunlit room. Not practical.
     
  10. spinnaker

    AAC Fanatic!

    Oct 29, 2009
    4,866
    988
    Yes unless the team somehow magically eliminated the laws of physics. :)
     
    DerStrom8 likes this.
  11. Wendy

    Moderator

    Mar 24, 2008
    20,764
    2,534
    My experience is the computer you are using is usually the slow link. Most of us do not use gaming or hyperfast machines.
     
  12. cmartinez

    Thread Starter AAC Fanatic!

    Jan 17, 2007
    3,554
    2,509
    What I'm wondering is, if you really take the necessary steps to optically isolate the room that you'd be working at, then you don't really need a perfect line of sight to the source, since the entire room would be lit with the modulated light and the computer could use the optical signals from all reflective (and illuminated) sources.
    Transmitting from the computer to the link would be a different thing, though.
     
  13. spinnaker

    AAC Fanatic!

    Oct 29, 2009
    4,866
    988
    You would need a light in every room (to have devices in all rooms). My whole house is rarely all light up. At night all the lights are off but I still listen to iHeart Radio on my tablet.

    And what happens in the day time?
     
  14. spinnaker

    AAC Fanatic!

    Oct 29, 2009
    4,866
    988
    Now if you can figure some way to modulate existing ambient light then that would be way cool!
     
  15. DickCappels

    Moderator

    Aug 21, 2008
    2,647
    632
    This has been tried before and failed to catch on. Maybe these people have fixed whatever the problem was (maybe financing or licensing). But what about outdoor use?
     
  16. cmartinez

    Thread Starter AAC Fanatic!

    Jan 17, 2007
    3,554
    2,509
    The article does mention that outdoor use is a weakness. But maybe they have solved key technical issues with indoors use that give the technology a competitive opportunity.
     
  17. cmartinez

    Thread Starter AAC Fanatic!

    Jan 17, 2007
    3,554
    2,509
  18. wayneh

    Expert

    Sep 9, 2010
    12,089
    3,027
    Could be a solution for the tinfoil hat crowd that doesn't want to be surrounded by wifi all the time.

    I wonder what bandwidth you could get from a streetlight.
     
  19. GopherT

    AAC Fanatic!

    Nov 23, 2012
    5,984
    3,722
    Outdoor use? Imagine a nice cool white LED source with lots of stray blue/UV emissions. Like attracting May Flies with a Mercury Vapor light. Imagine the bugs in the communications.

    Rain Drops...

    Fog...

    Beijing pollution...
     
    #12 likes this.