E1.31 ipv6 and increased number of universes.

Discussion in 'DMX, E1.31 & Networking' started by multicast, Jul 18, 2016.

  1. multicast

    multicast Senior Elf Generous Elf

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    Moving ahead we are looking at expanding the universe..


    in ipv6, the organisations ipv6 multicase address's are ffx8::/16 which is just a miserable 112 bits for usable multicast address's. ( this assumes we mirror the design of ipv4 sACN ).


    That gives us just 2^112 or ~ 5.2E33 universes.
    Thats ~8.9E33 pixels

    A Galaxy S6, has the highest pixel desnity of all cell phones at 22.7 pixels/mm, but for this discussion lets round up to 30pix/mm. This would be 300 times the pixel density of the video panels used at eurovision this year.


    thats 30 x 1000 x 1000 = 30,000,000 pixels/km or 9e14 pixels / square km


    The surface area of all 8 planets and the sun is 6.22e+12/km2.


    That gives us enough pixels to cover them 159,297,963 times.




    Should be just enough.
     
  2. cjd

    cjd New Elf

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    That's all very well if you are only planning on covering the surfaces of the Sun/planets.
    What about those of us aiming to run strings in the areas between the planets?
     
  3. OP
    OP
    multicast

    multicast Senior Elf Generous Elf

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    We all know that is going to be impossible due to power injection issues. Stop being so redicolus.
     
  4. cjd

    cjd New Elf

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    Each section will be powered by a small solar array - thereby avoiding any long power injection runs
     
  5. tuppetsdad

    tuppetsdad Funding & Tech Support

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    What's the point of calling them Universes when you only want to cover one solar system?? 8)
     
  6. OP
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    multicast

    multicast Senior Elf Generous Elf

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    whoa.... that is deep.
     
  7. OP
    OP
    multicast

    multicast Senior Elf Generous Elf

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    heres a question for you..


    if you where viewing the show from earth, and wanted the show to "appear" as if it was in sync, when would you need to send the first data...
     
  8. lithgowlights

    lithgowlights Senior Elf

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    Are the controllers on Earth or the sun? If they are on the sun, 8 minutes 20 seconds before viewing time, if they are on earth, 16 minutes 40 seconds plus any transmission processing delays
     
  9. logandc99

    logandc99 Dedicated Elf

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    Aren't we all viewing our shows from earth? [emoji6]


    Sent from my iPhone using Tapatalk
     
  10. OP
    OP
    multicast

    multicast Senior Elf Generous Elf

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    Lets assume all the controllers are on the earth, ( in a large datacenter, i suspect we'll need quite a few running in a large cluster to generate enough data ).. And for this though experiment we'll assume that devices can drive 1000universes each and they are even distributed over all the covered surfaces...
     
  11. lithgowlights

    lithgowlights Senior Elf

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    Then the issue is not likely to be the synchronizing, but the bandwidth required to be sent would likely far exceed the bandwidth of all radio telescopes on earth, let alone those pointing to the sun
     
  12. tuppetsdad

    tuppetsdad Funding & Tech Support

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    No point to view from earth as you could only see a small bit. Moon probably closest observation point (well until Branson space flights take off) and you could see with the naked eye. Tickets for seats are expensive though and you need to book about 10 years in advance.


    So I am suggesting better to have a large curtain of pixels in space .... When you turn on the pixels will there be a net force because of the light emission so they travel backwards?? and would that stuff up your time calculations....??


    Better show that the guy in Canberra with the 500k LED spaghetti lighting :cool:
     
  13. Barnabybear

    Barnabybear New Elf

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    Hi, isn't that why FPP remotes where created? But the more intresting point is did they prempt this problem?
     

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