OP2H is a
french project selected by the National Research Agency ANR (www.agence-nationale-recherche.fr).
The wireless systems are increasingly used in domestic environment. Last
ten years, mobile
Over the last decade the cell phone has experienced a great
expansion with a number of GSM users rose from 200 in 1992 to over 40 million.
Today it is the new broadband (WiFi, WiMax) and new wireless systems (ULB,
wireless sensors), which develop significantly. These networks are very dense
urban areas and the distribution of the electromagnetic field is very dependent
on the structure of the city: density, form and nature of buildings.
To ensure sustainable mobility in conjunction with an optimum coverage
and satisfy the constraints related to human exposure, these networks and
their radiated power must take into account the constraints related to power
consumption, the urban environment and that the fields generated by the
antennas and access points.
To meet these multiple and sometimes contradictory, it is essential to
have predictive tools to assess more accurately the radiated fields in order
to allow an optimized implementation of antennas, to reduce to minimum the
power radiated by those it and minimize the power consumed by the system.
The current generation of prediction tools (cover or exposure of people)
do not take into account the local heterogeneities may induce large variations
of the field. Indeed beyond the difficulties in information databases, methods
consider buildings as homogeneous with the most openings. Hence radio resources
are not always used with the greatest efficiency.
With new tools, taking into account the dynamic complexity of local scenes,
the powers used and consumed could be reduced through better siting of antennas
and reduced power output.