download - Radio Frequency Systems

3G indoors
with
Alcatel
The historic building housing
Alcatel’s global headquarters is
located in Paris’s 8th precinct.
Alcatel, Orange France and Radio
Frequency Systems band together
to deploy a broadband indoor
distribution network at Alcatel’s
Paris headquarters.
Alcatel has unveiled one of Europe’s first
integrated indoor distribution systems—a
solution that encompasses a third-generation
(3G) passive distributed antenna system
(DAS). This broadband distribution network,
6
CONFINED COVERAGE
supplied by Radio Frequency Systems, was
installed in the historic building housing
Alcatel’s headquarters, located near the
Champs Elysées in Paris. It will give all
employees permanent access to the recently
launched Orange Intense 3G services.
Alcatel developed a solution centred on its
Evolium universal mobile telecommunications
system (UMTS) platform, its
field-proven service radio technologies,
with RFS providing the essential in-building
RF system. According to Benoît de Corn,
Alcatel’s Director of Mobile Network
Services, Alcatel determined the building’s
RF distribution requirements, working in
close collaboration with cellular operator
Orange France, with RFS evolving this into a
complete turnkey broadband RF system
design. “This is a live demonstration of our
joint capabilities—Alcatel 3G solutions
perfectly completed by RFS products—in
partnership with Orange. This is in
continuation to 3G Paris infrastructure
already provided to Orange,” said de Corn.
3G wall-to-wall
The RFS design was developed to meet
exacting performance specifications
determined by Alcatel. “We were required
to provide power levels between five and
10 dBm at each antenna connector port
across the two buildings, with each
building comprising six office levels and
three parking levels,” said Philippe
Parmentier, RFS Global Program Manager.
“This was particularly important on floors
four to six, where we had to deal with
cell-to-cell interference from UMTS
coverage external to the building.”
A further challenge was that posed by the
historic nature of the building, which—with
its narrow vertical riser, and small horizontal
ceiling cavities—presented cable-routing
complexities. “The administrator of the
building was quite strict on the positioning
of antennas,” said de Corn. “We had to
hide a number of the antennas in lamps
and specific devices so that they were
not visible.”
A number of the antennas were
hidden in lamps and specific
devices to reduce the visual impact.