TV white spaces: PMSE coexistence tests

12 November 2014

This document contains the data from Ofcom’s tests to examine to what extent a new class of devices, white space devices (WSDs), could cause interference resulting in audio quality degradation into existing wireless equipment used by theatres, broadcasters, and others in the Programme Making and Special Events (PMSE) industry.

All wireless equipment uses radio waves, also known as spectrum. We are currently piloting a new type of technology called dynamic spectrum access. Use of dynamic spectrum technology potentially allows WSDs to use the same spectrum that is currently used for Digital Terrestrial Television and PMSE but at locations, frequencies and times such that those services will not be adversely impacted. In this way, WSDs can use valuable spectrum that would otherwise lie fallow, and provide useful new wireless services, while ensuring a low probability of harmful interference into other services. The tests described in this report are one component of this pilot, which also include:

  • similar tests in relation to the potential of interference from WSDs into TV reception via Freeview;
  • tests of processes, software and databases required to make the technology work, and
  • trials of services using WSDs.

We will use the information in this report, along with any other relevant evidence from the pilot, responses to our previous consultations and any other relevant stakeholder input or further evidence to inform our approach to co-existence and our decisions on the rules for authorising WSD operation, which we intend to set out in a forthcoming statement. We currently anticipate that this statement will be published in early 2015.

Full report

TV white spaces: PMSE coexistence tests (PDF, 4.2 MB)