Ofcom gives green light for ‘TV white space’ wireless technology
12 February 2015
‘White spaces’ are gaps in the radio spectrum in frequency bands, which can be used to offer new wireless applications to benefit consumers and businesses.
Industry is already testing a range of uses for this technology, such as internet access for ships and boats in the Orkney Islands, wireless video streaming of animals at ZSL London Zoo, new ‘machine-to-machine’ networks for flood defence in Oxfordshire and Wi-Fi-like services at the University of Strathclyde.
White space spectrum in the TV frequency band is appealing for industry because it can travel longer distances and more easily through walls than the bands mainly used by other wireless technologies, such as Bluetooth and Wi-Fi.
Ofcom is now putting in place the foundations for industry to use TV white spaces. A key part of this work has been to allow these airwaves to be shared, while managing the risk of interference for current users.
To avoid interference, databases will communicate with these devices to give them technical constraints they must operate within. These databases identify locations, frequencies and times where white space devices will not affect existing users and will apply rules, set by Ofcom, which put limits on the power levels they can operate at.
These frequencies are currently used for digital terrestrial TV, and on a sharing basis with wireless microphones used for programme making and special events (PMSE), among other services.
Based on the trials and stakeholder feedback, there is considerable interest from industry in developing this technology. Ofcom believes commercial applications for this white space technology could emerge by the end of the year.
Ofcom is exploring how the white space in other spectrum bands could be used for similar innovation in the future.
Meeting growing data demand
Ofcom is also supporting other forms of wireless innovation and has already released spectrum which can be used for machine-to-machine networks.
The UK is among the first countries in Europe to provide spectrum specifically for this technology, which will form a major part of what is becoming known as the ‘Internet of Things’, networks of devices communicating with each other online.
Steve Unger, Ofcom Acting Chief Executive said: “This decision helps ensure the UK takes a leading role in the development of innovative new wireless technology.
“It is also an important step in helping the UK’s wireless infrastructure evolve effectively and efficiently.”
Philip Marnick, Ofcom Spectrum Group Director said: “Ofcom is laying the foundations for industry to use database controlled spectrum sharing to deliver innovative new services to benefit consumers and businesses.
“Spectrum is an important but limited resource, which is why we’re exploring new ways of unlocking its potential, while balancing the needs of different users.”
Databases find gaps in the airwaves for white space devices to operate
NOTES FOR EDITORS:
1. There has been considerable interest in the technology with multiple trials running across the UK. Both public and private organisations are taking part, testing a variety of innovative applications, using spectrum temporarily licensed by Ofcom:
- Live video streaming: Google and ZSL London Zoo, along with equipment providers MediaTek and 6Harmonics, have launched a trial this week to use a TV white space network to stream live video of the Zoo's meerkats, Asian otters and giant Galapagos tortoises to YouTube. The trial will use Google's spectrum database and will help ZSL London Zoo test the technology for use in additional efforts to monitor and protect endangered animals in the wild.
- Flood defence: using TV white space technology, Love Hz and Nominet are working with the Oxford Flood Network, a citizen-built wireless sensor network, which provides early flood warnings for the community. Water levels are monitored in real-time and sent over white space using Adaptrum devices.
- Next generation Wi-Fi and city sensing: The University of Strathclyde's Centre for White Space Communications has been working with Microsoft, 6Harmonics, MediaTek, Spectrum Bridge, and Sky - with backing from the Scottish Government. The pilot explores how the latest technology, including triple-band Wi-Fi, can enhance internet coverage in indoor and outdoor urban locations and enable 'smart city' functionality, including linking webcams and other sensors.
- Internet on ships and boats: CloudNet IT Solutions, Fairspectrum and Carlson Wireless Technologies are using white spaces to provide internet connectivity and communications to ferries travelling in the Orkney Islands and Pentland Firth, which have no wireless broadband availability. CloudNet are also looking to extend this trial to other transport operators in the area. Separately, Microsoft, Neul and 6Harmonics have been working with Click 4 Internet on the Isle of Wight to test how the technology could work with boats at sea.
- Broadband coverage enhancement: King's College London, the Joint Research Centre of the European Commission, and Eurecom, are leading an EU effort to investigate various scenarios for providing backhaul over TV white space to achieve broadband access in challenging situations. This includes studying long-distance roof-top white space links and long-distance in-building and between-building white space links. As well as coverage enhancement, these services could provide broadband for security, emergency and disaster relief situations. An important capability being investigated is the aggregation (merging) of TV white space links and channels to maximise capacity and address challenging and innovative communication applications.
2. White space technology is one way of meeting the growing demand for data in the UK. Ofcom is separately planning to free up more spectrum later this year, or early 2016, potentially for high speed mobile broadband. This follows the successful completion of the 4G mobile spectrum auction in 2013.