[OZAPRS] VK3 IGate / Zone system.

Tue Nov 7 19:54:18 EST 2006

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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