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Joined: Nov 04, 2003 Posts: 2225 Location: Bedfordshire, UK
Posted: Sat Mar 25, 2006 10:40 pm Post subject: Re: Destinator 6 - Trafficmaster only? or TM/ITIS combined?
Petekk wrote:
Does anyone have any info on the impending D6?
Destinator only has a license with Trafficmaster, so I would not expect it to ship with iTIS support. Because of the way the technology works, you cannot support two providers at the same time (without a lot of extra hardware and some very clever software).
Destinator had a licence for iTIS with Destinator PN? Has this agreement ended?
I see no reason why a product cannot use more than one TMC provider.
The UK is unusual that it not not have a Free TMC service (such as in France or Germany). The destinator press release implies that the "premium pay data" is avaliable "as with the freely avalible information". Surely in the contries that have "free" information avaliable, this information is not ignored in preference to once provider?
In Germany, the free TMC system is broadcast by 10 public broadcasters & private stations. Using a location table of 32500 locations, covering the entire motorway network, plus major highways, and all major access roads to stadiums used in World Cup 2006.
The Pay system (TMC Pro), is similar to TM/Itis using 4000 IR detectors, plus 5500 inductive loops, plus Floating data, plus police reports.
Joined: Nov 04, 2003 Posts: 2225 Location: Bedfordshire, UK
Posted: Thu Mar 30, 2006 10:31 am Post subject:
jase_31 wrote:
Destinator had a licence for iTIS with Destinator PN? Has this agreement ended?
Did they? I can't find any information saying they had an RDS-TMC agreement with iTIS - they may have had (and may still have) a license for the traffic information to provide it over GPRS, but they don't appear to have an RDS-TMC license.
Quote:
I see no reason why a product cannot use more than one TMC provider.
It's more a hardware limitation - the radio has to listen to the radio channel to receive the messages - this takes time, as it's a slow data feed. If there were 300 odd messages, it would take most of 3-5 minutes. Given the data updates approx. every 5 minutes, it needs to constantly listen.
To receive 2 different RDS-TMC signals (reliably and in good time) you would need another radio listening to the other frequency data feed.
This is the main limitation - although there are other software limitations of how to handle the conflicting details from 2 different sources, but the hardware issue means this never happens. Even Siemens VDO, the one supplier who offer their customers RDS-TMC from either Trafficmaster or iTIS only allow the customer to select one feed at a time.
Quote:
Surely in the contries that have "free" information avaliable, this information is not ignored in preference to once provider?
I would be careful with their press release - they claim to be the first to offer RDS-TMC data in the first place, yet others have had it for a year or two. Again, the unit will choose 1 frequency to tune to, and only listen to that 1 signal.
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