The U.K. Office of Communications wants input on...

first set of frequencies in which Ofcom has decided to authorize dynamic spectrum access, but it could be enabled more widely in the future, it said. Ofcom decided to permit use of white-space devices in the UHF band in an earlier decision, subject to ensuring low probability of harmful interference to other services in and adjacent to the band, it said. But there’s uncertainty about the risk of interference from such devices, and Ofcom prefers to “err on the side of caution at this early stage” by setting parameters that could be relaxed in the light of more experience, it said. Later this year it will test its proposals to the extent possible in trials around the U.K. by a variety of service providers, it said. As part of the pilot, the regulator will allow increased power levels to be used for limited time periods, it said. It will then redefine its coexistence proposals based on the trials and evidence from stakeholders, and finalize them next summer before launching a full, nationwide solution later in 2014, it said. The consultation proposed parameters and algorithms aimed at ensuring a low risk of harmful interference from white-space devices to DTT services, licensed users of equipment for program making and special events and services above and below the UHF TV band. The proposal also sets out how Ofcom will avoid harmful interference from white-space devices to services used by Britain’s international neighbors, it said. Initial modeling of the potential effects of the coexistence proposals shows white-space availability for four scenarios that vary by device category and antenna height, it said. Comments are due Nov. 15.