[pskmail] Unconnected email
- From: Pär Crusefalk <per@xxxxxxxxxxxx>
- To: pskmail@xxxxxxxxxxxxx
- Date: Thu, 21 Apr 2011 09:50:40 +0200
Hi all,
This is mostly just an idea but perhaps it should be investigated
further?
Yesterday I talked to Oleg Kazharsky that participated in the polar ring
arctic expedition. Unfortunately they had some technical difficulties
with their vehicles so the expedition has been aborted. Unfortunate but
the main thing is of course that they are safe and can possibly try
again later (provided there are sponsors etc).
The plan was to use pskmail during the expedition and the main use was
to be aprs with position reports and short web page updates by using
unconnected pskaprs emails. When I asked Oleg what else he would want to
see in there then he wanted something similar to pskaprs email but in
the opposite direction. Like push email from server to client.
With the conditions on the pole, and the tiny vertical antenna on the
vehicles, it can sometimes be difficult to establish a stable arq
connection. There are time constraints as well as varying conditions and
a vehicle that moves up and down a lot.
They are also using iridium but it doesnt work very well and is
difficult to use so he would like to avoid it as much as possible.
What we could do is have the client send unconnected frames addressed to
a certain server with a few commands. Provided the user is registered at
the server then the client could send unconnected frames that can be
interpreted like:
client->server: get list of my 10 or x latest emails.
client->server: get my message no x.
The answer to both of these should probably be a short broadcast from
the server, possibly with a nice and robust mode too. A very robust FEC
mode would be good here.
This would open up two way email handling also for stations with
restrictions on use of power (solar powered sailboat for instance).
The query is short, uses very little power. QRP email :-).
Yes, the negative side of this is that the broadcast from the server can
be disturbed and an arq connection is of course much better for handling
emails. But, this new way is extremly fast and consumes very little
power with the client. Your ideas and worries about this?
73 de Per,
sm0rwo
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