Telia deploys mobile-network signaling on Oslo metro

Telia said it deployed a digital signaling system on the Oslo metro that Radio Access Network (RAN) over the operator’s commercial 4G/5G mobile network, a claim the company described as a European first. Sporveien was identified in the release as the Oslo subway transport operator.

The release said the system used communications-based train control technology to provide more precise train-position tracking than legacy signaling, and that this capability allowed operators to reduce headways and run trains closer together.

Siemens Mobility developed the solution and the release said CBTC linked trains, trackside equipment and central control systems. The delivery to Sporveien formed part of Telia’s Enterprise Mobile Network portfolio, which the release said could use 4G, 5G or a combination to provide customized connectivity; the prior signaling system had been in place since the Metro opened in 1966 and the initial deployment covered line 4 between Brattlikollen and Bergkrystallen.

“As far as we know, only the New York City Subway uses a mobile network as part of a signaling system. It places high demands on availability and service quality, and Telia is ready to deliver. We congratulate Sporveien on this new system, and we’re very proud of our innovative collaboration with both Sporveien and Siemens Mobility.” Morten Karlsen Sørby said.

“The subway can only operate with a well-functioning signaling system, so this project is extremely important for Oslo’s residents. By replacing technology that has passed its useful life, we’ll reap additional benefits such as more frequent departures and increased capacity in the years to come.” Birte Sjule said.

Implementation across the entire subway was scheduled for 2030.