Skip to main content

Paris Metro is now 100% covered with LTE

Paris Metro may not be the oldest in the world but it is still one of the world's oldest. Having first opened in 1900, it was last expanded in 2013. It it no doubt that this was the main motivation for the Régie Autonome des Transports Parisiens or RATP excitedly announced that 100% of Paris metro is now covered in 4G!

Mobile Europe reported:

The network was a joint effort between France’s four mobile operators – Bouygues Telecom, Free Mobile, SFR and Orange. 

The service works in the Metro's tunnels and on trains, according to Régie Autonome des Transports Parisiens (RATP), the authority that runs the city’s Metro and the Réseau Express Régional (RER – the city’s suburban rail network).

There is also coverage at the RER stations that intersect with Metro lines.

The service enables access to passenger information such as via the RATP and Via Navigo applications.

According to RATP, operators had to jointly manage many technical constraints for the installation of 300km of cables, 3,000 antennas and 280 technical hubs or rooms, many underground, and sometimes more than 100 years old.

Some 321 telecom sites have been set up on the network to cover 304 underground stations, including access to them, plus platforms and tunnels.

Three sites have also been created to house operators’ equipment outside certain stations to work round space and air conditioning constraints.

RATP says it is the first historic transport network to offer access to 4G on its entire network.

While I am not sure who is the vendor for the Paris metro, Nokia has been conducting extensive tests in the Paris underground. Nokia, within a consortium called SYSTUF, conducted a trial project in real-world conditions on Paris metro line 14. The white paper available here presents this project and its results.

The video embedded below presents the SYSTUF project and its results. It is in French with English voiceover.

In another recent announcement, Nokia said that they and ENGIE Solutions will be deploying LTE wireless network for Grand Paris Express lines 15, 16, 17.

The Société du Grand Paris (SGP) has selected a consortium comprising Nokia and ENGIE Solutions to deploy an industrial grade LTE private wireless network for new automated lines of the Grand Paris Express metro.

The project will cover over 200 kilometers of new lines, 68 new metro stations and all of the metro trains running on Paris metro lines 15, 16 and 17 routes.

The project will provide critical, high-speed wireless connectivity services that will meet all future Grand Paris Express operational and maintenance requirements, as well as its transportation network emergency and security needs.

Deployment of a private wireless network is part of an innovative approach by the Société du Grand Paris, as it replaces conventional technologies traditionally used in metro transport with LTE – a highly reliable, secure, broadband technology.

Nokia will deploy an LTE private mobile radio solution designed for operational communications and indoor/outdoor connectivity across all Grand Paris Express stations, lines and depots. These include voice, data (file transfer and multimedia support) and video services (transmission, on-board video surveillance). The global leader in rail communications network deployments, and pioneering the private wireless space across many verticals, Nokia now has over 130 large enterprise customers using 4.9G/LTE and 5G private wireless networks around the world.

While the news is all about 4G, in the 2019 annual results (published in March 2020), RATP announced:

The upgrading of stations and passenger information (€170m), encompassing significant advances in service quality: continuing the deployment of 3G/4G (90% of stations covered at the end of 2019), new display screens for waiting times on metro line 4 and RER suburban line A, launch of the new RATP app in June 2019, the possibility to charge Navigo passes and buy travel passes via smartphone, upgrading and renovation of spaces with, in particular, the improvement of cleaning devices for stations and trains, and “nudge” operations on 3 metro lines and 10 multimodal hubs.
RATP Connect continued to deploy 3G/4G throughout the Paris metro, with 325 stations equipped at the end of 2019, reaching 90% of the network. 

Good to know that the lines have 3G along with 4G as this is very useful considering many devices still do not use 4G VoLTE for voice calls.

Related Posts:


Popular posts from this blog

Laser Inter-Satellite Links (LISLs) in a Starlink Constellation

When we first talked about Starlink back in 2019 , we saw in the video that the concept involved laser communication to communicate between the satellites. While the initially launched satellites did not have the laser communication mechanism built in, it looks like they are being added to the newer ones.  A report from Fast Company in late 2021 said: One of the next big upgrades in telecom will involve satellites firing lasers at each other—to beam data, not blow stuff up. The upside of replacing traditional radio-frequency communication with lasers, that encode data as pulses of light, can be much like that of deploying fiber-optic cable for terrestrial broadband: much faster speeds and much lower latency. “Laser links in orbit can reduce long-distance latency by as much as 50%, due to higher speed of light in vacuum & shorter path than undersea fiber,” SpaceX founder Elon Musk tweeted in July about the upgrade now beginning for that firm’s Starlink satellite constellation. The

CSI-RS vs SRS Beamforming

In an issue of Signals Flash by Signals Research Group (SRG), they talked about 2 different types of MIMO. Quoting from their journal, "CSI-RS versus SRS. Those operators that have tested or made token use of MU-MIMO leverage a flavor of MU-MIMO that is based on CSI-RS. The MU-MIMO network we tested was based on SRS, which makes it far more likely to observe sixteen spatial layers (versus eight)." I reached out to Emil Björnson, Visiting Professor at KTH Royal Institute of Technology and Associate Professor at Linköping University to see if he has explained this in any of his videos. Here is what he said: " I'm not talking about 3GPP terminology in any of my videos. But you can listen to the slides that starts around 12:40 in this video (embedded below) . If you are looking for CSI-RS vs SRS based MU-MIMO, then jump to around 12:40 in this video where you can see CSI-RS being referred to as "grid of beams" and SRS is similar to the other option, which is t

IEEE 802.11be Extremely High Throughput (EHT), a.k.a. Wi-Fi 7

We have been writing about Wi-Fi for a long time, weather it's to do with indoor connectivity , competition with 5G or just a name change to something simpler. When we last wrote about WiFi 6, a.k.a. 802.11ax, we were expecting a quick adoption of the technology in the industry. We are still not there yet.  You know what's strange? None of the new @madebygoogle gadgets from yesterday support Wi-Fi 6. Not the Pixel 5, not the Pixel 4a 5G, not the Nest Audio, and not the new Chromecast. — Ry Crist (@rycrist) October 1, 2020 Take for instance the new iPhone 12 supports Wi-Fi 6 in all their models as one would expect but none of the new Google Pixel phones (4a, 4a 5G and 5) support it. In fact none of the new Google devices support it. Which is rather bizarre. While we are still looking forward to Wi-Fi 6 becoming widespread, IEEE has already started working on the successor of 802.11ax, 802.11be - Standard for Information technology--Telecommunicati