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Joint Radio Company Ltd.

Independent Radio Spectrum Management for the UK Energy Industry
 

Representational Activities:

Little LEO Compatability

Radiocommunications Committees

JRC Advisory Committees

Representational Activities

JRC represents its membership in many ways, perhaps the best way to illustrate this is to describe a few case studies:

ORBCOMMLIVE Trials

The JRC, in association with the UK Radiocommunications Agency, has been conducting field trials on a live PMR system in order to ascertain the interference potential of sharing our PMR mobile transmit spectrum with ground-based terminals (Communicators) from the ORBCOMM Little-Low-Earth-Orbit (Little-LEO) system. The results are surprising and the interference potential is far worse than we suspected. This boils down to the fact that the ORBCOMM system (and all similar Little-LEO systems) is very similar in basic operation to our MPT1327 systems and the two systems are completely incompatible with each other, i.e. sharing just isn't feasable.

In the USA, trunked systems have a right to exclusive spectrum as the FCC recognise that channel sharing is not possible in the same geographic area. Because of this, and in recognition of the incompatibilities between the different Little-LEO networks, the operators had agreed a bandplan amongst themselves to avoid sharing the same spectrum.

Unfortunately, the rules regarding the sharing of trunked spectrum in the USA were not made known to the UK and European Regulators who assumed that, like most other types of terrestrial PMR, MPT1327 systems were not susceptable to interference from Little-LEO systems. Recognising the incompatibility, the UK Radiocommunications Agency has now implemented a band-sharing arrangement which keeps the two incompatible systems apart in the UK. For more information, click HERE!

Radiocommunications Committees

The JRC Represents its Members in many committees and fora, including:

  • Radiocommunications Agency
    • Technical Advisory Group (TAG) incorporating the former Civil TETRA Experts Committee (C-TEC)
    • Mobile Services Committee (MSC)
    • Joint RA/FCS Digital Project Group
    • Scanning Telemetry Working Group
    • We also keep a watching brief on other RA Mobile and Fixed Services Committees
  • CEPT
    • Spectrum Engineering 28 (SE28) - MSS and RNSS technical standards, operational and compatibility issues

In addition, JRC has its own internal Advisory Committees which advise on the long-term policy and operational matters of the JRC.

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Page Last Modified: Thursday March 08, 2007
Print Date: Tuesday October 07, 2008