[digitalradio] Re: The digital throughput challenge on H

2006-08-28 Thread Dave Bernstein
Those are all low-occurrence events that could be implemented with 
one-to-one messages with no significant performance degradation.

One-to-one messaging with ARQ would seem optimal. KISS, remember?

   73,

   Dave, AA6YQ


--- In digitalradio@yahoogroups.com, "DuBose Walt Civ AETC CONS/LGCA" 
<[EMAIL PROTECTED]> wrote:
>
> New/updated Routing Information...station availibility, frequency 
changes, etc?  Currently in NTS called net bulletins.
> 
> 73...K5YFW
> 
> -Original Message-
> 
> "...under what circumstances would a message transport layer 
> require one-to-many transmission?
> 
>73,
>   Dave, AA6YQ
>







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RE: [digitalradio] Re: The digital throughput challenge on H

2006-08-28 Thread DuBose Walt Civ AETC CONS/LGCA
New/updated Routing Information...station availibility, frequency changes, etc? 
 Currently in NTS called net bulletins.

73...K5YFW

-Original Message-

"...under what circumstances would a message transport layer 
require one-to-many transmission?

   73,
  Dave, AA6YQ



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[digitalradio] Re: The digital throughput challenge on H

2006-08-24 Thread Dave Bernstein
If messages to N recipients are converted to N messages to 1 
recipient, under what circumstances would a message transport layer 
require one-to-many transmission?

   73,

  Dave, AA6YQ

--- In digitalradio@yahoogroups.com, KV9U <[EMAIL PROTECTED]> wrote:
>
> Chris,
> 
> There are several amateur radio to e-mail systems available now and 
they 
> all use ARQ.
> 
> For sending a shared resource, such as is done all the time on 
SSTV, the 
> stations are often using WinDream or Hampal which allow you to send 
out 
> replacements for bad segments. It can be time consuming, but it 
will 
> allow for perfect copy on the receiving end without repeating the 
entire 
> data stream.
> 
> The timing issue for ARQ has been solved for the PC side. And most 
any 
> rig would be able to handle it easily. The one exception was Amtor 
and 
> that is pretty much obsolete as an ARQ mode as it only transmitted 
three 
> characters on each "chirp."
> 
> 73,
> 
> Rick, KV9U







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