EXCLUSIF: test THEA pour les interférences V2X dans la bande 5,9 GHz
La Tampa Hillsborough Expressway Authority (THEA) entreprend de nouveaux tests d’interférence dans la bande de sécurité des communications de transport de 5,9 GHz, après l’annonce de l’année dernière que le Wi-Fi sans licence sera autorisé à fonctionner dans la moitié inférieure du spectre.
S’exprimant exclusivement dans la dernière édition du podcast TTI, le directeur de l’innovation de THEA, Bob Frey, qui aide à superviser le pilote de véhicule connecté de l’USDOT en Floride, a expliqué que, tandis que la transition du protocole de communication DSRC au C-V2X, également mandaté dans les communications fédérales de l’année dernière La décision du Comité (FCC), était susceptible de progresser sans heurts, il y avait plus d’inquiétude quant au potentiel d’interférence si le spectre disponible est réduit.
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Frey revealed that as part of the fourth phase (CV4) of the pilot in Tampa, Florida – which leads directly on from the first three phases: planning, deployment and data collection – testing is being undertaken specifically aimed at identifying potentially dangerous interference from unlicensed wi-fi. Although it should be noted that ITS America and AASHTO are still advocating for the spectrum to be preserved.
“We are actually installing a signal generator, and we’re going to do some testing on the impacts of different signals on real-time safety applications,” says Frey. “We’re interested in red-light violations and wrong-way warnings, that drivers are going to rely on. These have to happen extremely quickly to be useful. As opposed to traffic information systems, which you have a little more time on. They might tell you there’s a crash up ahead and you need to take a different route – that gives us a little more time on getting that information out.
“But the real-time safety ones are where we need to be wary of interference – we need to make sure that we’re putting these out there, that they’re safe and they work, and that the public can count on them as traffic safety management, similar to what we do with signals.”
You can hear the full interview with Bob Frey in Episode 11 of the TTI Podcast.