[aprssig] alternatives to TCP

Steve stevewa206 at gmail.com
Sun Apr 6 10:35:19 PDT 2014


Doesn't the deep space network use a long latency protocol? I also thing it
is free because your tax dollars paid for it.

Steve

On Sunday, April 6, 2014, Bill Vodall <wa7nwp at gmail.com> wrote:

> Here's a note from a week ago on the APRS SIG which I only now noticed
> mentioned DTN.  It's interesting that there's a SF implementation in
> place.
>
> A follow up comment on the ION-DTN note was:
>
>   > Uh --- I don't think we want to be delivering "larger objects or
> files" on a 1200-baud radio network.
>
> To which I have to add - of course we do....
>
> 73
> Bill, WA7NWP
>
> PS.  Anybody not get the First Contact reference yesterday?    I
> wonder if they'll still have cheese steak sandwiches at the Bozeman
> Pickle Barrel 49 years from now.
>
> ---------- Forwarded message ----------
> From: Jim >
> Date: Sun, Mar 30, 2014 at 10:52 AM
> Subject: [aprssig] alternatives to TCP
> To: aprssig at tapr.org <javascript:;>
>
>
> There's been some mails in the digest recently under a subject line of
> passcode alternatives, etc.
> Leaving aside the security/authentication/non-ham traffic issues..
>
> Why not use Disruption/Delay Tolerant Networking using Bundle Protocol
> or LTP?  They are specifically designed for long latency radio links
> without real time acknowledgement (although it can accommodate it).
>
> You put BP protocol data units into whatever link layer you want
> (AX.25, CCSDS AOS, IP UDP, etc.)
>
>
> There's an off the shelf implementation called ION
>
> http://sourceforge.net/projects/ion-dtn/
>
>
> Seems it could interoperate just fine with existing APRS traffic, but
> give you way to do delivery of larger objects  or files.
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