[OZAPRS] VK3 IGate / Zone system.

Tue Nov 7 21:47:33 EST 2006

On Tue, 07 Nov 2006 21:26:14 +1100, Richard Hoskin <vk3jfk at amsat.org>  
wrote:

>
> 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.

However, WIDE1-1,WIDE2-1 is equally as simple as RELAY,WIDE.

>
> 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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