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Introduction

1.1 Ofcom has announced in the Spectrum Framework Review: Implementation Plan (“SFR:IP”) (published on 13 January 2005) proposals to make available for award the band 872-876MHz paired with 917-921MHz. This band was previously licensed to a company in the Inquam group for the provision of a Public Access Mobile Radio (PAMR) network but when the licence was revoked in July 2004 the network had not been rolled out.

1.2 This note provides a summary of recent work undertaken by Ofcom in relation to the potential technical characteristics of this band, and in particular the constraints that may be appropriate to avoid interference to existing GSM network(s) in adjacent bands.

1.3 This note is provided to assist potential respondents to the SFR:IP consultation. Ofcom considers that the technical analysis included in this note is relevant to the consultation, as any significant constraint on the technical use of the bands may impact on the potential use of the spectrum.

1.4 The note identifies, in Annex A, a proposed specification for use of 917-921 MHz. This proposal takes into account the desirability of avoiding interference to adjacent GSM networks.

1.5 This document has been prepared because Ofcom is required to consider the constraints that it would be appropriate to impose on use of the 917-921 MHz band if the band is to be released for use. Ofcom has a duty to secure optimal use of the electro-magnetic spectrum, and in considering the constraints that should be set for the 917-921 MHz band, Ofcom considers that it is appropriate to take into account any adverse effects that use of this band may have on the users of adjacent bands. This document does not, however, imply that the users of those adjacent bands enjoy a guarantee of freedom from any particular level of interference.

The full document is available via the link below.

• 917 921 MHz technical constraints [pdf]
  Full print version

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