System Planning
From satellite systems to multimedia wireless, from rural fixed
telephony to urban mobile cellular systems, we are able to help our
clients plan their systems to maximise the efficiency of spectrum
use, ensure that performance objectives are achieved and minimise
the cost of required infrastructure.
Examples of how we can help include:
- Designing radio links in order to achieve a particular
performance objective based on equipment and propagation
behaviour taking account of intra- and inter-system
interference.
- Trading-off different network or system parameters including
multiple access methods, diversity, performance objectives,
coverage requirements and network architecture.
- Collating, verifying and processing the technical data that
has to be submitted both at a national and international level
for the purposes of licensing and co-ordination.
- Client support and, if required, representation during the
licensing and co-ordination process.
We have experience in system planning across a wide range of
radio applications including broadcast, fixed, mobile and satellite
systems.
Cellular Network Design
Our engineering staff have been actively involved in the design
and optimisation of cellular networks. We are able to help our
clients at all stages of the design process including rf system
engineering design, cellular network operation performance analysis
and optimisation, and traffic engineering and planning. We are also
able to offer to our clients consultancy and technical support
services regarding cellular network design and expansion.
Our engineers have extensive experience in analysing cellular
network scenarios and environments. We conduct radio propagation
modelling and interference analysis using the Aegis Spectrum
Engineering Toolkit, together with a variety of mathematical tools
deploying a wide range of empirical and theoretical propagation
models that take into consideration parameters such as network
environment (dense urban, urban, suburban or rural), terrain,
atmospheric and building penetration losses. Our extensive knowledge
of base-station sub-system (BSS) equipment combined with expertise
in rf spectrum management enables us to assist our clients in all
the issues related to cellular network planning.
Rural Telecommunications
Although there is a considerable demand for telecommunications in
rural areas, providing cost-effective telecommunication services is
a challenging task, as density and clustering of subscribers is too
low to make the provision of cable or conventional radio solutions
economic. Desirable features of rural communication systems are:
- economy of installation and operation
- ease of maintenance
- structural simplicity
Our expertise in rural communication network system planning
comprises a thorough awareness and understanding of appropriate
technologies for provision of communication systems in rural areas,
particularly in developing countries. We have built up considerable
skill and experience in the modelling and analysis of radio systems
and the use of propagation modelling related to the rural networks.
In particular, we specialise in:
- the definition of meaningful measures of spectrum efficiency
for rural network applications
- the derivation of straightforward design rules to ensure that
networks meet the performance measures
- the development of discrete event simulation platforms to
simulate the spectral usage with various levels of detail in
order to predict, correctly, the network performance observed in
real applications
- the development of routing, channel assignment and power
control algorithms for improvement of network spectrum
efficiency
Satellite Communications
The user demands placed on satellite systems require that a
careful balance be struck during the satellite system design. This
balance has to take account not only of the most cost-effective
overall architecture, but also the technical regulation under which
the transmissions must operate. We have provided expertise in
satellite communication system design for over a decade, enabling us
to advise our clients in areas such as:
- The design of innovative satellite systems, where existing
technical regulations will not always embrace the particular
application being considered. It is then necessary to take
account of the technical background to the existing regulations
so that, on the basis of a justifiable extrapolation from this
technical background, the system design can be undertaken.
- Satisfaction of a multiplicity of communication requirements,
where it is essential that the flexibility designed into the
architecture is not dominated by a single requirement.
- System operation at higher frequencies where propagation
impairments become a significant design factor.
- Interference prediction and international co-ordination.
Broadcast
Aegis engineers have practical experience of the planning of
terrestrial broadcast networks, for both radio and television
services, at frequencies ranging from LF to UHF. We have also
undertaken studies related to the implementation of digital
broadcast networks using the COFDM
techniques that form the basis of the European standards for both
digital TV and radio in Europe.
Elements of broadcast planning with which we have been concerned
include:
- the estimation of network coverage in terms of area and
population
- the prediction of interference to or from proposed new
services, taking into account agreed assignment plans (e.g.
Geneva '84 or Wiesbaden '95)
- the specification of transmitter and antenna characteristics
- site survey and testing
To discuss how Aegis could help plan your fixed, mobile,
broadcast or satellite system, contact us at enquiry-2008@aegis-systems.co.uk.
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