[OZAPRS] VK3 IGate / Zone system.

Tue Nov 7 21:26:14 EST 2006

At the moment you wouldn't get an RF path to Mildura as they are on a
different frequency to Melbourne. In the future you would not get a
reliable
RF path to Mildura from Melbourne either so you'd rely on the Mildura
IGate.

But to answer your hypothetical you would use RELAY,WIDE at present.
ZONEn-n
would complicate the process.

Cheers
Richard
VK3JFK

> -----Original Message-----
> From: ozaprs-bounces at aprs.net.au [mailto:ozaprs-bounces at aprs.net.au] On
> Behalf Of Mike Townsend
> Sent: Tuesday, 7 November 2006 7:54 PM
> To: VK / ZL APRS Users
> Subject: Re: [OZAPRS] VK3 IGate / Zone system.
> 
> Hypothetical question.
> 
> I'm in Melbourne from Mildura on business driving around with APRS. The
> good
> lady at home is keeping an eye on my where abouts with an RF only APRS
> setup. How do I  set my tracker so the beacons only go up the RF path to
> the
> Mildura region?
> Would using a designated ZONEn-n make this easier or complicate the
> process?
> 
> 
> ----- Original Message -----
> From: "Richard Hoskin" <vk3jfk at amsat.org>
> To: "'VK / ZL APRS Users'" <ozaprs at aprs.net.au>
> Sent: Tuesday, November 07, 2006 6:30 PM
> Subject: Re: [OZAPRS] VK3 IGate / Zone system.
> 
> 
> > Dion,
> >
> > This is a flexible system that uses the UI-Digi Pre-emptive
digipeating.
> >
> > Don't think of it in the terms that are being discussed here with
> > SSn-n/Zonen-n as it uses a different concept based on cells with an
> > Internet
> > backbone. It is a holistic coverage approach that minimises traffic
> while
> > providing all station with a full view of the network on RF.
> >
> > The system is transparent to the users, they only need to set a path
of
> > RELAY,WIDE (or WIDE1-1,WIDE2-1) for mobiles and 'Their closest
> digi',WIDE
> > for home stations. We've tried to used the KISS principle but for
those
> > that
> > need a little extra help with a local path they can visit
> > http://vk3.aprs.net.au/packet_path_guide.htm
> >
> > Once setup there is no additional maintenance required and some
> redundancy
> > is built in.
> >
> > Cheers
> > Richard
> > VK3JFK
> >
> >
> >> -----Original Message-----
> >> From: ozaprs-bounces at aprs.net.au [mailto:ozaprs-bounces at aprs.net.au]
On
> >> Behalf Of Dion Bramich
> >> Sent: Tuesday, 7 November 2006 5:22 PM
> >> To: VK / ZL APRS Users
> >> Subject: Re: [OZAPRS] VK3 IGate / Zone system.
> >>
> >> How do you limit traffic to one zone?  How do you do interzone
routing
> >> without involving other zones? How do you identify/define the zones
> >> easily?  How do you explain in simple terms to a newcomer how to
> >> configure
> >> his path?  IMHO you have a unnecessarily high maintenance, hard to
> >> understand system.
> >>
> >> Dion.
> >>
> >>
> >> On Tue, 07 Nov 2006 17:04:22 +1100, Richard Hoskin <vk3jfk at amsat.org>
> >> wrote:
> >>
> >> >
> >> > This is a brief explanation of the way IGates are zoned in VK3, Mt
> >> > Gambier
> >> > (VK5) & southern NSW (VK2).
> >> >
> >> >
> >> >
> >> > Summary
> >> >
> >> >
> >> > To maintain high levels of efficiency and provide the widest
possible
> >> > mobile
> >> > coverage on the APRS Network it is important to have a
well-designed
> >> > network
> >> > based on a sound strategy. To this end the APRS network has been
> >> > divided
> >> > into Zones, which are linked together by the internet through
IGates.
> >> The
> >> > concept is similar to the GSM mobile phone network.
> >> >
> >> >
> >> > Details
> >> >
> >> > An IGate Zone is an area that is covered by a single RX Only IGate.
> The
> >> > Zone
> >> > extends a maximum of 2 hops (Wide Digipeaters) from the RX Only
> IGate.
> >> > The
> >> > RX Only IGate is located as close as possible to the centre of the
> >> > Zone.
> >> >
> >> >
> >> > The central TX IGate injects local internet APRS traffic into the
RF
> >> > network
> >> > which propagates through the state's RF network. This reduces the
> >> > possible
> >> > complications of hidden transmitters and timing issues allowing for
a
> >> > more
> >> > efficient RF system. It also means that data entering the system
from
> >> any
> >> > one of the zones RX Only IGates is propagated through all other
zones
> >> via
> >> > the central TX IGate. This again reduces network traffic while
> >> > providing
> >> > a
> >> > mechanism which allows the APRS users data to propagate through the
> RF
> >> > Network.
> >> >
> >> >
> >> > An IGate Zone is defined in detail in the document 'APRS Network
> Design
> >> > for
> >> > VK3'. For an explanation on Wide Digipeaters read the document
'APRS
> >> > New
> >> > User Path Information Guide'
> >> >
> >> >
> >> > Traffic levels are the greatest limiting factor in the size of the
> >> > IGate
> >> > Zone.
> >> >
> >> >
> >> > To prevent packet duplication and network looping problems, (that
> very
> >> > quickly overload the local RF network) only one RX Only IGate per
> Zone
> >> is
> >> > used. It is also much more cost effective to have only one IGate in
a
> >> > zone.
> >> >
> >> >
> >> > The RX Only IGates will also function as a local message gateway
> which
> >> RX
> >> > and TX local APRS messages for the area. The coverage area of the
> Local
> >> > message zone is considered to be a maximum of two hops from the
local
> >> > RX
> >> > Only IGate. The local RX Only IGate shall have a path of APRS via
> "the
> >> > Local
> >> > Wide Digi",WIDE.
> >> >
> >> >
> >> > APRS 'Wide Digipeaters' are currently programmed to digipeat the
> >> > alias's
> >> > RELAY, WIDE, TRACE, INETZ[x], WIDEn-N, Tracen-N.
> >> >
> >> >
> >> > Victorian Zones
> >> >
> >> >
> >> > Victoria has been divided into 6 IGate Zones; 5 Zones operate RX
Only
> >> > IGates
> >> > and 1 Zone is the main State TX IGate as well as the local RX IGate
> >> >
> >> >
> >> > The IGate Zones are listed below.
> >> >
> >> >
> >> >
> >> > IGate Zone
> >> >
> >> > IGate Callsign
> >> >
> >> > Designation
> >> >
> >> > RX Coverage Area
> >> >
> >> > APRS Digipeaters Covering Area
> >> >
> >> >
> >> > 1
> >> >
> >> > VK3SB-1
> >> >
> >> > TX/RX
> >> >
> >> > Melbourne, Ballarat, Geelong
> >> >
> >> > VK3CV-1, VK3RMD-1, VK3RBU-1, VK3JFK-1 (VK3ROW-1)
> >> >
> >> >
> >> > 2
> >> >
> >> > VK3JTM-5
> >> >
> >> > RX Only
> >> >
> >> > Western Victoria, South Eastern South Australia,
> >> >
> >> > VK3RPG-2, VK3SSS-1, VK3RMK-1, VK5JFK-1, VK3KAY-1
> >> >
> >> >
> >> > 3
> >> >
> >> > VK3JFK
> >> >
> >> > RX Only
> >> >
> >> > (Backup TX)
> >> >
> >> > North Central Victoria, Southern NSW
> >> >
> >> > VK3RMG-1, VK3YWY-1, VK3RCV-1, VK3ECH-1
> >> >
> >> >
> >> > 4
> >> >
> >> > VK3VHF-1
> >> >
> >> > RX Only
> >> >
> >> > Gippsland
> >> >
> >> > VK3ZV-1, VK3RGI-1,VK3REB-1, VK3BLE-1, VK3VHF-1
> >> >
> >> >
> >> > 5
> >> >
> >> > VK3KAW
> >> >
> >> > RX Only
> >> >
> >> > North East Victoria, Southern NSW
> >> >
> >> > VK3RGR-1, VK3RAW-1, VK2RBY-1, VK3RLE-1, VK3HJQ-1
> >> >
> >> >
> >> > 6
> >> >
> >> > VK3WRM
> >> >
> >> > RX Only
> >> >
> >> > North West Victoria
> >> >
> >> > VK2RBX-1, VK3RON-1
> >> >
> >> >
> >> >
> >> > Cheers
> >> >
> >> > Richard
> >> >
> >> > VK3JFK
> >> >
> >> >
> >> > _______________________________________________
> >> > Ozaprs mailing list
> >> > Ozaprs at aprs.net.au
> >> > http://aprs.net.au/mailman/listinfo/ozaprs
> >>
> >>
> >>
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> >
> >
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