Many of the same companies are working at the European level and within
ETSI. According to ETSI documentation work on the proposed standard
EN301598 for white space devices and wireless access systems operating
in the 470-MHz to 790-MHz frequency band is being supported by Ofcom,
Nokia, BT Group, Microsoft, CSR, Sky Interactive and Research in Motion
UK. The draft ETSI standard is described as "stable" and is due to be
finalized by June 1, 2013 and then begin an approval process with a view
to delivery to the European Commission by June 2014.
common in matters of wireless communication standards the situation is
inherently complicated. In the matter of TVWS itself there are issues
related to wireless microphones that already share television broadcast
spectrum. "They are a licensed user and they have to be protected," said
Robin Heydon, responsible for global standards at CSR.
made the point that spectrum is a finite resource but that demand to
use it is set to grow exponentially. "Cognitive radio is a way of
managing spectrum in the future. That's why we are excited," he said, adding that might be done either by way of the current method, a
database look-up, or autonomous radio sensing.
Heydon made it
clear that the opportunity for dynamic spectrum allocation extends beyond television white space.
Heydon gave the example of radar used to check railway level crossings
"Railways have radar to check for obstructions. Before we start sharing
that spectrum we need a non life-critical application to demonstrate
white-space. TV is non safety-critical application."
and European trials have to be specially licensed to use otherwise
licensed and allocated frequencies the situation in the U.S. is more
liberal. On March 1, 2013 the Federal Communications Commission
announced that is had authorized approved TVWS database systems to
provide services to unlicensed radio devices that operate in the unused
spectrum in the TV as defined by the database.
Related links and articles:
First silicon for M2M Weightless applications
M2M group launches its Weightless standard
Weightless standard for IoT outlined in book