Co-ordination
As an increasing number of systems compete for use of the radio
spectrum, so the need to protect existing users grows. The
protection of existing radio systems is ensured through a formal
process known as co-ordination, which is invoked before a new system
is introduced. During this process, negotiations are undertaken with
a view to making system adjustments or defining operational criteria
that ensure a mutually satisfactory frequency sharing environment.
 Examples
of where co-ordination is likely to arise include:
- between satellite networks
- between satellite Earth stations and terrestrial services in
the territory of a different Administration
- between satellite networks and terrestrial services (as
illustrated in the map of Canadian terrestrial stations
opposite)
- between terrestrial services of neighbouring Administrations
Aegis is able to provide comprehensive support for co-ordination
activities, including:
- System level planning, including the derivation of link
budgets to achieve service level objectives while taking account
of propagation conditions and equipment performance.
- System filing with ITU (advance notification, co-ordination,
Resolution 46 procedure related to use of Non-Geostationary
Orbits, etc.), based on the system design and associated link
budgets.
- The analysis (including simulation) of specific interference
situations involving space and/or terrestrial systems, including
the identification of possible interference mitigation
techniques. Preparation of a report suitable for presentation to
other parties, such as Administrations or the operator of a
sharing service.
- The presentation and justification of results to other parties
as part of the co-ordination process.
- Negotiation with other parties in order to overcome any
perceived difficulties during the co-ordination process.
- Further interference analysis in order to demonstrate a
mutually acceptable interference environment arising from
technical changes negotiated during the co-ordination process.
The above co-ordination process is typical of that applied at an
international level and a similar process is often followed at a
national level when obtaining a licence for the introduction of a
new radio system. Aegis can provide support for both national and
international co-ordination activities.
To discuss how Aegis could help your organisation to achieve
success in national or international co-ordination, contact us at enquiry-2008@aegis-systems.co.uk.
See also:
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