COVERING LETTER & BRIEFING PAPER
From:
To:
Professor Paul A Brown
CEO, White Box Solutions Ltd, UK
E-mail(1): fi61@dial.pipex.com
E-mail(2): paulbrown@whiteboxsolutions.co.uk
Tel: +44 (0)1539 737272
Mobile: +44 (0)7860 616176
Professor Cave
Date: 17th August 2001
Subject: SPECTRUM MANAGEMENT REVIEW, 2001
Dear Professor Cave,
Spectrum Management Review, 2001
Please find attached our response to your on-going review, which consists of a
briefing paper, entitled 'Towards Wireless and Wireline Harmonisation', together
with two supporting, power-point, presentation packs.
These presentation packs describe simple experiments, which we feel underpin
the development of more enhanced spectrum management techniques in order
to realise a more effective utilisation of the electromagnetic spectrum for the
benefit of all.
Yours sincerely,
Professor Paul A Brown,
White Box Solutions, UK
Document continues below…………….
TOWARDS WIRELESS AND WIRELINE HARMONISATION
A briefing paper by Dr Paul A Brown, White Box Solutions, UK
In order to realise the 'Information Age' we require broadband, digital,
telecommunication networks with 'access-connectivity' to every home and small
office. If we require these access services to be interactive and broadband then
we need bandwidth, which in turn necessitates frequency spectrum and is not
optional. Furthermore, we require some form of communication infrastructure to
carry the broadband access communication signals. If we look to new cable
infrastructure then we incur high installation costs, which might be an
unacceptable burden in terms of the required capital investment and have both
short and long term adverse environmental impacts.
If we consider existing metallic infrastructures, such as the incumbent
Telcommunication Operator's (Telco) local loop and the regional electricity
company's (RECs) Low Voltage Electricity Distribution Network (LVEDN), which
collectively interconnect to almost every home and office in the industrialised
world, then we might have an opportunity to provide new, interactive, high
bandwidth wireline access solutions, via such metallic infrastructures, which offer
cost-effective and competitive alternatives.
Why should we choose fixed wireline infrastructures to access the home and
small office? Why not choose wireless instead? I suggest that one very good
reason is that the devices we need to communicate and interact with are located
in the home and permanently utilise an electricity supply and/or a traditional
telephone line. If we consider personal communications then wireless solutions
are ideal for voice telephony, but no one ever really personalised television, no
matter how small you made the screen!
Existing infrastructures, such as the LVEDN and the Telco local loop were
designed to carry electrical energy, at ultra low frequency (i.e. 50 Hz) or direct
current impulses and voice frequency signals at up to approximately 4 kHz,
respectively. Neither of these ubiquitous networks was designed, primarily, to
carry high bandwidth signals, with frequency components extending well into the
high frequency bands, and which are, as a result, susceptible to levels of unintentional radiated emissions.
Therefore, we now consider that there should be a focus to determine the
radiation efficiencies of such networks at high frequencies, their radiation
profiles, the potential near and far field effects and any cumulative effects of their
exploitation on existing and future, high frequency, wireless services. If we can
re-use spectrum over and over again on existing metallic infrastructure in order
to provide cost-effective, competitive, broadband, interactive, local access
services whilst minimising the impact on existing wireless services then we might
achieve a further utilisation of the high frequency spectrum on a massive scale.
Details of experiments, conducted in conjunction with Lancaster University, are
appended in power point format. They illustrate wireline and wireless systems
operating in close proximity and consider high frequency spectrum re-use.
Doc. Ref.: WBSSPECTRUMMANAGEMENTCAVEPAB01