[OZAPRS] RE: [ui-view] Removal of the UI-Viewmessageextensions fromUI-View32

[Alan Wallace (ZL1AMW)]

In support of Richard on this one,  the UI-View message protocol sends
each line immediately it is typed, allowing a number of lines to be
"outstanding" before they are acknowledged one at a time.  

APRS format requires each line to be acknowledged before the next is
sent.

Multi-line messages in the UI-View format are therefore delivered very
much faster than the APRS format, which is appreciated here.

On a bad or busy path, a message conversation in APRS format often gets
so slow it is boring and the operators have gone away (or to sleep)
before the text gets to the far end.

Cheers

Alan ZL1AMW

-----Original Message-----
From: ozaprs-bounces at marconi.ics.mq.edu.au
[mailto:ozaprs-bounces at marconi.ics.mq.edu.au] On Behalf Of Tony Hunt
Sent: Tuesday, 20 April 2004 10:04 p.m.
To: vk3jfk at amsat.org; ozaprs at marconi.ics.mq.edu.au;
ui-view at yahoogroups.com
Cc: ozaprs at marconi.ics.mq.edu.au
Subject: Re: [OZAPRS] RE: [ui-view] Removal of the UI-View
messageextensions fromUI-View32

Richard, Can you explain this ?? Why is Ui-View messaging more efficient
??
Why do the messages pass better ?? I have not seen this at all.. Is it
really a matter of the paths used and not so much the message type?? Are
Ui-View messages that much shorter frames that it makes a difference and
propagates better on hard paths ? I must say I am fascinated though!

Although we have discouraged its use here in VK5 as its not compatible
with
D7's D700's APRS-Dos etc and some operators have no idea of what a
UI-View
message is as opposed to a APRS type message let alone the fact that
they
are sending one (a Ui-View style message).. You also probably remember
that
Ui-Digis are/were not compatible with Ui-View messaging. In earlier
versions
of Ui-Digi we had major problems with the digis treating the frames as
though they were to be digied with the SSIDs decreasing in the style of
SSID
directional digipeating on the destination address.. Now we have the
option
in Ui-Digi to defeat this problem with the UIMsg command.. Sending a
Ui-View
type mesaage to a station with a SSID other than -0 was invariably a
mess
that didnt work.. In early days of Ui-Digi we found that there was no
way
you could send a Ui-View message to some stations even though they were
running Ui-View because of the destination address and the Digis..
Suffice
to say my conclusion was that its all too hard..

It would seem with the evolution of the APRS spec and also various APRS
clients and software that we need a commonality to be able to send
messages
regardless of what software we choose to run.. I can see were Roger is
comming from..

Still if there is some advantage to it all then lets explore it. I am
all
ears..

Tony Hunt VK5AH

----- Original Message -----
From: "Richard Hoskin" <lhoskin at bigpond.com>
To: <ui-view at yahoogroups.com>
Cc: <ozaprs at marconi.ics.mq.edu.au>
Sent: Tuesday, April 20, 2004 6:36 PM
Subject: [OZAPRS] RE: [ui-view] Removal of the UI-View message
extensions
fromUI-View32


>
> Roger,
>
> I disagree with the removal of the UI-View message format and request
that
> it is kept as part of UI-View in the future.
>
> Here in Australia the main APRS program that 99% of people use is
UI-View.
>
> We have been experimenting with ARPS messaging for some time using
both
the
> APRS standard and the UI-View extensions. We have found that the
UI-View
> extensions work in a more efficient and reliable manner on our RF
Networks
> than the APRS standard.
>
> If we send a message to a set path using ARPS standard the message
will be
> received about 70% of the time an ACK received by the sender about 50%
of
> the time. Using the UI-View extensions we are finding an increase in
success
> to message reception of about 90% and ACKs received by sender of about
80%.
>
> This indicates that the UI-View message system tends to be more
reliable
> than the APRS standard.
>
> It is also felt that the UI-View message extension system is more
efficient
> and faster to communicate with than the standard APRS messaging.
>
> Regards
> Richard
> VK3JFK
>


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