[pskmail] Re: Ecuador's emergency network
- From: karel Fassotte <karel.fassotte@xxxxxxxxx>
- To: pskmail@xxxxxxxxxxxxx
- Date: Mon, 31 Jan 2011 08:31:11 -0500
Thanks John for your comments. I will check the on the fly
compression/descompression..
We will some more testing and evaluation.
I feel that you adressed well the most vital elements.
I will have to think about it and discuss this with the 'central de Reisgos'
and ham operators overhere in Ecuador.
greetings
Karel
HC1AKP
2011/1/31 John Douyere <vk2eta@xxxxxxxxx>
> Karel,
>
> Responding to your two previous emails:
>
> 1. Creating a new software modem (with out without specs) is not a
> trivial exercise. It could easily be several man-weeks and more likely
> man-months to get is coded, tested, optimized and debugged.
>
> 2. Producing a derivative of an existing modem like I did when I
> developed the robust version of PSK for the Pskmail application can
> limit the effort to several man-weeks but I don't see it being below
> that.
>
> 3. Integrating the Winmor TNC with Pskmail would work for Windows and
> would require a fair amount of work (man weeks), but would not be a
> trivial affair at all for Linux (read complicated and most likely not
> reliable in my opinion).
>
> 4. To take full benefit of the speed of fast modems Pskmail would
> need to be optimized for that purpose. This would be in the order of a
> few man-weeks (I would *guess* 2 to 6 man-weeks).
>
> 5. Just to make sure you don't interpret the previous points as a
> selling speech, I personally don't have the time to do any of the
> above. If you have to source such a capability, the typical "profile"
> of persons developing such modem software is that of a DSP engineer
> (although many others can be competent in the matter due to personal
> interest such as you find in the HAM sphere).
>
>
> The above should give you an idea of the efforts ahead for your
> investigation, as you requested.
>
> But at the end this is the beauty of open source: other people's
> solutions are available as a starting point for new needs. This is
> exactly what happened with the Intermar version of Pskmail, which is
> focussed on Sailor's needs (see www.pskmail.eu) or with the
> development o fthe PSK Robust modes in Fldigi.
>
>
> 6. I don't understand your comments about compression/decompression on
> the fly. Pskmail does have compression and decompression on the fly.
> This is totally transparent to the user. You must tick the "Compress
> OTA" box in the preferences to enable it.
>
> 7. I agree with you the software modems have and will continue to gain
> place vs hardware ones in the HAM community (I am not speaking about
> commercial applications here).
>
> 8. Maybe you have or your group has done the simulation and/or field
> trials and you may have a good handle on the priority of that speed
> issue versus the rest, as in for example, topology of the network
> (with/without internet, central server vs distributed, number of
> parallel networks, routing, types of messages as in message/document
> passing vs email passing vs web pages vs others), volume of messages,
> expected time distribution of messages, maximum message latency
> acceptable, robustness in regards to installation of the applications
> on various PC brands and with different hardware capabilities, ease of
> field usage, training requirements, effectiveness versus (and
> integration with) voice networks during different grades of
> emergencies, etc... but that is not visible to us.
>
> So in my opinion, and based on what I consider limited information
> supplied, I would seriously weight how much that speed issue is
> important versus your other criteria.
>
> I am totally convinced that the success of the deployment and the
> continued use of such a system on such a scale will most likely be
> related to a number of criteria, which all need to be addressed,
> rather than a single issue of *raw data speed*. Therefore I really
> feel that if development time is spent it would need to be across a
> number of points, not just raw data speed, to make the application a
> good fit for your situation.
>
>
> Hope this helps,
>
> Regards,
>
> John (VK2ETA)
>
>
> On Mon, Jan 31, 2011 at 1:36 PM, karel Fassotte
> <karel.fassotte@xxxxxxxxx> wrote:
> > Larry first it will not be my money. If so I woud like to see some
> benfits.
> > In this case it will be no commercial project I am working on.
> > Thanks Larry for being so direct about the money and my mouth.
> > I think its not oanly the resources the economics, that make it
> feasinable
> > or not. Yu must see the need for it. If PSKMAIL is fast enough for the
> users
> > now, there will be no motivation to get to a more rapid speedy modem.
> > The pactor III modems can do the job also, but that makes the burden much
> > higher for the amateurs. Another hardware another modem.
> > I think sound cards got so sofisiticated the software solutions will gain
> > terrain.
> > Larry
> > I am not sitting back but I am investigating possibilities. If we can get
> > the picture complete we can see what we can do.
> > If were are talking about money how much would it cost to bind the
> different
> > advanced modems to the PSKmail??
> > F.I. the WINMOR, OFDM/PSK specifications are well documented, also the
> > 188-110 modems are documented and some software sourcecode is available.
> > What woud be a reasonable timeline?
> > Larry and others now its your turn, inviting you to get the clear
> picture.
> > greetings
> > Karel
> > HC1AKP
> >
> > 2011/1/30 Larry Levesque <ka1vgm@xxxxxxxxx>
> >>
> >> On Sun, Jan 30, 2011 at 05:40:53PM -0500, karel Fassotte wrote:
> >> > Needs: a message 1KB, 2KB, shoud be handled in 1 minute, to maintain
> >> > channel
> >> > capacity.
> >> >
> >> > I wish PSKMAIL to integrate a faster modem, like WINMOR capable of
> >> > handling
> >> > a message in 1 minute. Simple and fast.
> >> >
> >> > I am aware of the fact that I a not in the position to urge a
> solution,
> >> > but
> >> > however I would like to discuss possiblities to get it done. The
> authors
> >> > of
> >> > FLDIGI, tell me that they have no plans doing so but.... I would like
> >> > FLDIGI, PSKMAIL be the solutions for reasons of open source,
> >> > multiplatform.
> >> >
> >> > Please let me know all what you think about my proposal and the
> >> > possiblities
> >> > to have it done.
> >> > I woud like to stop dreaming and get the networks running.
> >> >
> >> > greetings
> >> > Karel
> >> > HC1AKP
> >> >
> >> >
> >> >
> >> >
> >>
> >>
> >> I say you need to find and pay a programmer to do this. If you are not
> >> willing to put your money where your mouth is, just sit back and wait.
> >>
> >>
> >>
> >>
> >> --
> >> Larry Levesque
> >> KA1VGM
> >>
> >>
> >
> >
>
>
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