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Correct packet path whilst mobile.
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Alex Greenland
Whilst mobile it has been suggested that I change my packet path to
'RELAY,TRACE2-2' for the IGATE. Could sombody please explain why this is required. I have read thru the aprs spec and cannot find a reference to this, unless I have missed it ! Please don't take this out of context, I am willing to change but would like an explanation of why and I suspect this would be useful information for other mobile staions. |
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PE1RDW (Andre)
On Thu, 16 Mar 2000, Alex Greenland wrote:
From: "Alex Greenland" <alex.greenland@...>I don't know youre local net layout but my gues is that a path of relay,trace2-2 is all it take's to get to the igate 73 de Andre PE1RDW aprsdigi co-ordinator Netherlands member aprs workgroup Netherlands |
From: "Alex Greenland" <alex.greenland@...>Hi Alex, you will most likely get several different answers to the best path when mobile; but my version goes like this: All stations should include the alais RELAY (as well as others as required), so a mobile station sending to the path RELAY WIDE, for example then has the best chance of hitting a digi and getting his position passed onv even when in a poor location. Also, the path dosent need to change as the mobile moves area. Fixed stations should NOT use RELAY anywhere in the path (execpt in exceptional circumstances) because this will generate a LOT of QRM. This happens because EVERY station should respond to RELAY. My own view on the best path is RELAY,WIDE,WIDE.. (as many WIDE's as you think necessary to cover the range you require. My reason for not using TRACE is that there are quite a few standalone digi's that dont respond to TRACEn-n so they wont relay your beacon. I an ideal world only well sited stations should use WIDE & TRACE so there should be no degradation by using WIDE rather than TRACE. BUT this isnt an ideal world so you may have to experiment to find the best setting for your area. Hope that is some help 73 Jeff |
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Brian Davies
Message text written by INTERNET:ui-view@...
Fixed stations should NOT use RELAY anywhere in the path (execptin exceptional circumstances) because this will generate a LOT of QRM. This happens because EVERY station should respond to RELAY. < Hi All I'm confused! Not difficult to do that I hear you say! I was recommended to use RELAY, WIDE................... Please can someone who knows what they are talking about - and are known to know what they are talking about - like Roger please explain this to me. What should I have in my digi path? Many thanks 73 Brian |
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Roger Barker
In article <200003170356_MC2-9D72-CEF@...>, Brian Davies
<brian_j_davies@...> writes [snip] Please can someone who knows what they are talking about - and are known toI only write the program... What digi aliases you should use is an APRS thing, unrelated to any particular software application. -- Roger Barker, G4IDE - roger@... For UI-View goto to - For WinPack goto to - |
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Steve Sampson
Here's how to find your correct digi path:
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1. Can you hear the WIDE node? 2. Can the WIDE node hear you? If the answer to 1 or 2 is no, then you need a RELAY. Have fun, Steve ----- Original Message -----
Please can someone who knows what they are talking about - and are known toI only write the program... What digi aliases you should use is an APRS thing, unrelated to any particular software application. |
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Ian Wade
In article <200003170356_MC2-9D72-CEF@...>, Brian Davies
<brian_j_davies@...> writes From: Brian Davies <brian_j_davies@...> Brian, the generally accepted path (throughout the world) for MOBILE, repeat MOBILE, stations is to have RELAY as the first digi callsign in the UNPROTO path, and all FIXED stations should have at least one *ALIAS*; i.e. RELAY. Thus when a mobile passes in range of any fixed station anywhere, the mobile's signal will be relayed by the fixed station. Regarding any digi callsigns following RELAY in the MOBILE's UNPROTO path, most people (throughout the world) seem to use WIDE, but that isn't obligatory. It depends on the network around the fixed station -- if there isn't another station in range of the fixed station that recognizes WIDE, the mobile signal won't get any further. Don't confuse a FIXED station's ALIAS(es) with its UNPROTO digi path. The ALIAS(es) specify what callsigns it is *listening* for. The UNPROTO path specifies the path it *transmits* to. The UNPROTO path of a FIXED station should not contain RELAY (for the reasons mentioned by the other person above). Hope this helps :-)) 73 Ian, G3NRW Technical Editor, APRS Protocol Specification -- +-----------------------------------------------------------------+ | APRS on 144.800 [IO91SX] ~55km/35 miles NNW of London | | email: g3nrw@... | | | | APRS PROTOCOL SPEC: +-----------------------------------------------------------------+ |
From: "Steve Sampson" <ssampson@...>Hi Steve, How can you tell when mobile????!!!!! theat is why the accepted unproto path WHEN MOBILE is: RELAY,WIDE... that gives you the best chance of being relayed. Fixed stations should NOT use RELAY in their unproto path, for the reasons previously stated, BUT THEY ALL should have RELAY set as one of their ALIASES so that they digi mobiles sending to RELAY... If a fixed station cant get to a WIDE directly they should not use RELAY before the wide (unless local circumstances mean that there is no other path due to poor seting up in the area)they should put in the callsign of the intervening digi station. Also they might ask that station to set WIDE as an alias so that they see the traffic that they would otherwise miss! 73 Jeff G8HUL |
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Ciemon G0TRT
As my bulletin is set up to send:" /M use RELAY,TRACE2- for the IGATE
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please", I'll explain. In this area, from the Wash right down to Kent, there are no "WIDE" digis, they all have the ability to TRACE. I run an IGATE (MB7UPG) alongside Keith G6NHU (MB7UIV) My beacon (and bulletins) go out to APRS,TRACE3-3 Anyone who hears my beacon can get into my IGATE by following a return path of RELAY,TRACE2-2 Keith will also hear this, so...... To be seen and workable through an IGATE in the east/south east whilst mobile use a path of RELAY,TRACE2-2 Hope this explains the thinking behind the bulletin 73.....Ciemon GTRT sysop MB7UPG IGATE g0trt@... From: "Alex Greenland" <alex.greenland@...> |
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Carl
Fixed stations should NOT use RELAY in their unproto path, for theThe second paragraph contradicts the first a bit. Essentially when there are loads of stations about, fixed stations should use well located callsigns to get out of the area. If activity is up/down (or off/on as here) then RELAY has a better chance of getting out regularly. I hope to go to the Blackpool rally so there will be at least one RELAY digi around. Carl gw0tqm gw0tqm@... |
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John Parr
theres at least one RELAY digi on your way to Blackpool round about J23 M6
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...ME de G6WVL John.. -----Original Message-----
From: Carl <carl_mail@...> To: ui-view@... <ui-view@...> Date: 17 March 2000 23:02 Subject: Re: [ui-view] Correct packet path whilst mobile. From: Carl <carl_mail@...>callsignsFixed stations should NOT use RELAY in their unproto path, for theThe second paragraph contradicts the first a bit. Essentially when there to get out of the area. If activity is up/down (or off/on as here) thendigi around. |
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Jon Eyes
I have turned relay on also, for the benefit of the rally - it's a clear
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path from Blackpool to here across open water (about 10 miles).... ~~~~~~~~~~~~~~~ Jon Eyes. G7OMN Southport. U.K. Sysop: GB7OMN.#16.GBR.EU AX25 Packet BBS -----Original Message-----
From: John Parr [mailto:john@...] Sent: 17 March 2000 23:42 To: ui-view@... Subject: Re: [ui-view] Correct packet path whilst mobile. From: "John Parr" <john@...> theres at least one RELAY digi on your way to Blackpool round about J23 M6 ...ME de G6WVL John.. |
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Keith Maton
Ciemon has got this absolutely spot on here... In OUR local situation, if
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you're mobile in the South-East and can hear either of the two I-GATE's, then a path of RELAY,TRACE2-2 should (in theory) give you a extremely good chance of getting back to it. Keith SysOp MB7UIV -- Keith Maton, G6NHU feek@... ICQ: 1776683 Get paid to surf the net - I do! See: - Careful with that Axe -----Original Message----- |
From: Brian Davies <brian_j_davies@...>If you are finding out by experimentation, why would that be 'wrong' Brian? Basically, try all the suggestions, then try a few of your own ideas and settle on what seems to work best for you in your area. Cheers de Dave (G0DJA) |
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