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Full 4G coverage coming to London Underground… by the mid-2020s


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TechRepublic’s Karen Roby talks with ZDNet’s Scott Fulton about the future of 6G, the current status of 5G, and breaks down the difference between the two. Read more: https://zd.net/2JBhSji

London is finally gearing up to address one of the biggest gripes visitors and commuters have when using the Underground: no mobile connectivity. 

Two years after London Mayor Sadiq Khan announced 4G would arrive in the Tube by 2019, Transport for London (TfL) says it is really coming – just a little later than expected. By March 2020 the eastern half of the Jubilee line will have mobile access within station platforms and tunnels between Westminster and Canning Town. 

The new mobile infrastructure will offer an alternative to the existing Wi-Fi available in some stations (TfL also recently started using Wi-Fi to track passenger flows

“This is a really important step for the millions of people who use the Tube each year,” said Khan.

“Introducing 4G and, in the future, 5G will help Londoners and visitors keep in touch and get the latest travel information while on the go. London is the best place to live, visit and work – and projects like this will help make it even better.”

Mobile service at the London Bridge and Waterloo stations are expected to come online in 2020, subject to approvals. 

While the initial roll out will address major mobile black spots in the city, full coverage of the London Underground isn’t expected until the “mid-2020s”, by which time much of the rest of the country should be using 5G.

TfL says a new procurement phase will commence shortly for coverage of the entire Underground with contracts expected by mid-2020. 

The soon-to-be-launched trial phase is meant to inform the agency and mobile network operators of the challenges in running a mobile network across the Underground.

TfL is installing the cabling required for the network ahead of awarding the contract so that it can “better manage station access, reduce the amount of disruption these works may cause to customers and allow the concessionaire to then quickly utilise infrastructure once the final contract is awarded.” 

The agency says it will lay 2,000 kilometers of cabling to support the full network, which all needs to happen outside of operational hours.

“The London Underground network is an incredibly challenging environment in which to deliver technological improvements, but we are now well on the path to delivering mobile connectivity within our stations and tunnels,” said Shashi Verma, chief technology officer at TfL.   

The Night Tube’s around the clock service on Fridays and Saturdays also restricts available installation hours. Additionally, narrow spaces between the trains and tunnel walls leaves little room to safely install network gear. 

TfL says it has narrowed down the list of contenders for the work to four bidders, which include Axia SC Consortium, BAI Communications, Cellnex UK Ltd, and Wireless Infrastructure Group

The winner will need to have a full grasp of the challenges of working within a transport network that opened 150 years ago. 

The same mobile network will host the Home Office’s troubled Emergency Services Network (ESN) that will replace the legacy Airwave system used by the Britain’s police, fire services and emergency response teams. 

The planned roll out of 4G follows a trial on the Waterloo and City line during 2017 that were carried out with Telefonica O2 and Vodafone using Huawei’s radio units, LampSite base stations and small cells.  BT also provided a backhaul circuit using a Cisco router. 

A Commons select committee gave a damning assessment of the ESN project last week due to massive budget overruns, poor contractor management, unrealistic goals, and missed deadlines. BT, which acquired EE after it won the ESN contract, has also removed Huawei equipment from the core network over its stance on using equipment from the spurned Chinese network vendor.



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I'm a 50 year old PLC programmer from Burnley, UK. I severed my time as an electrician in the baking industry and soon got involved with the up and coming technology of PLC's. Initially this was all based in the Uk but as the years went by I have gradually worked my way around the globe. At first it was mainly Mitsubishi with a bit of Modicon thrown in but these days the industry leaders seem to be the Allen Bradley range of PLC and HMI’s.

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