[OZAPRS] VK3 IGate / Zone system.
Dion Bramich
vk7ybi at yahoo.com.au
Tue Nov 7 22:09:35 EST 2006
On Tue, 07 Nov 2006 21:54:25 +1100, Ron Perry <ronk at sunlinux.com.au>
wrote:
> On Tue, 2006-11-07 at 19:54 +1100, Mike Townsend wrote:
>> 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?
>>
>>
> How it happens now. Please note that VK3WRM is and has always been apart
> of the 145.175MHz APRS network...we just have to remember to change
> frequencies when travelling south. :-/
> Being a local, you would have your posits broadcast locally, via the
> Igate, VK3WRM. A Melbourne Igate would hear your posit directly or
> indirectly. As there has been no demand, we currently don't broadcast
> the whole state of Vic's traffic, but I have in the past on request.
>
> If you used MILDn-n in Melbourne unless seen direct by an Igate, then
> they would be ignored. (I suspect)
> Would all the Igates broadcast it?
>
> The change in the Vic Frequency would not change the operation.
>
> Zonen-n packets I can see being used only by Igates and should be used
> to limit the broadcast of Internet sourced data. I don't think there is
> a need for home stations to adopt Zonen-n, unless they were being heard
> by 2 RX Igates, and wanted a choice.
>
> Your thoughts?
>
My thoughts, youve seen the light! How is there another way you can
prevent I-Gate traffic from arriving here, NSW or VK5? Simple path
limiting doesnt account for propagation, there is a path from Mt Barrow to
many well sited digis in Victoria more often than not. ZONE-ing doesnt
have to be limited to I-Gates though, I will be using a ZONEd path here, I
simply dont wish to be seen in Victoria via RF only. One less packet of
mine that traverses that path makes room for one more mobile or message.
Dion.
> Regards,
> Ron
> vk3ecv
>
>
>> ----- 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
>> >>
>> >>
>> >>
>> >> --
>> >> Using Opera's revolutionary e-mail client:
http://www.opera.com/mail/
>> >> Send instant messages to your online friends
>> >> http://au.messenger.yahoo.com
>> >> _______________________________________________
>> >> Ozaprs mailing list
>> >> Ozaprs at aprs.net.au
>> >> http://aprs.net.au/mailman/listinfo/ozaprs
>> >
>> > _______________________________________________
>> > Ozaprs mailing list
>> > Ozaprs at aprs.net.au
>> > http://aprs.net.au/mailman/listinfo/ozaprs
>> >
>> >
>> >
>> > --
>> > No virus found in this incoming message.
>> > Checked by AVG Free Edition.
>> > Version: 7.1.409 / Virus Database: 268.13.29/520 - Release Date:
>> 6/11/2006
>> >
>> >
>>
>> _______________________________________________
>> Ozaprs mailing list
>> Ozaprs at aprs.net.au
>> http://aprs.net.au/mailman/listinfo/ozaprs
>
> _______________________________________________
> Ozaprs mailing list
> Ozaprs at aprs.net.au
> http://aprs.net.au/mailman/listinfo/ozaprs
--
Using Opera's revolutionary e-mail client: http://www.opera.com/mail/
Send instant messages to your online friends http://au.messenger.yahoo.com
_______________________________________________
Ozaprs mailing list
Ozaprs at aprs.net.au
http://aprs.net.au/mailman/listinfo/ozaprs
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://second.aprs.net.au/pipermail/ozaprs/attachments/20061107/aa1ad429/attachment.htm
More information about the Ozaprs
mailing list