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Why is GSM so poor inside buildings?



 
 
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  #1  
Old February 2nd 05, 11:41 PM
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Default Why is GSM so poor inside buildings?

I work in Research Triangle Park, North Carolina. There are cell
towers all around. If I'm outside I have no problem with my Cingular
GSM service. But inside the moment I step away from the window the
signal drops to zero.

It's to be expected I thought; the building is made of lots of concrete
and steel. Just a fact of life that I won't get a usable signal
inside.

But plenty of people come through the building where I work and just
keep talking on their Nextel and Verizon phones. The concrete and
steel all around seem to have little effect.

What gives? Why does my GSM signal die at the window but others seem
to penetrate right through.

You may have noticed that I haven't said what I phone I've been using
since the last 4: Ericsson 688, 888, T28 and current Motorola V400 have
all exhibited the same behavior. The common denominator seems to the
Cingular GSM network.

Frank

  #2  
Old February 3rd 05, 05:06 PM
Michael Schmidt
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Experience is Europe tells us that it simply takes several years until
the GSM coverage is so dense that you have a sufficiently strong signal
in all (or most) buildings. The situation in Germany is that the two
premium providers offer a coverage which makes GSM communication in
almost all buildings possible. If you (have to) use on one of the two
other providers, you also suffer from missing communication in some
(maybe 1/3) of the buildings.


Michael



schrieb:
I work in Research Triangle Park, North Carolina. There are cell
towers all around. If I'm outside I have no problem with my Cingular
GSM service. But inside the moment I step away from the window the
signal drops to zero.

It's to be expected I thought; the building is made of lots of concrete
and steel. Just a fact of life that I won't get a usable signal
inside.

But plenty of people come through the building where I work and just
keep talking on their Nextel and Verizon phones. The concrete and
steel all around seem to have little effect.

What gives? Why does my GSM signal die at the window but others seem
to penetrate right through.

You may have noticed that I haven't said what I phone I've been using
since the last 4: Ericsson 688, 888, T28 and current Motorola V400 have
all exhibited the same behavior. The common denominator seems to the
Cingular GSM network.

Frank



--
Michael Schmidt
University of Siegen, Germany
http:
www.dcs.uni-siegen.de
e-mail: schmidt _at_ nue.et-inf.uni-siegen.de
  #3  
Old February 3rd 05, 11:02 PM
C Antoine
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Default

Michael Schmidt a formulé ce jeudi :

Experience is Europe tells us that it simply takes several years until the
GSM coverage is so dense that you have a sufficiently strong signal in all
(or most) buildings. The situation in Germany is that the two premium
providers offer a coverage which makes GSM communication in almost all
buildings possible. If you (have to) use on one of the two other providers,
you also suffer from missing communication in some (maybe 1/3) of the
buildings.


The premium providers always got 900Mhz spectrum, while others often
got 1800 only, which is poor for indoor coverage. In Frank's case, the
spectrum seems to be 1900MHz, even poorer for indoor penetration...

--
Christophe

Couverture GSM Oléron 2003
http://chantoine3.free.fr

  #4  
Old February 4th 05, 02:05 AM
John S.
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Default

The common denominator seems to the
Cingular GSM network.


I don't know, so I will ask, but is it that the Cingulalr Network there is
1900PCS and not 800 Cellular?

Keep in mind that the technology really doesn't keep penetration down as much
as frequency.

NEXTEL is an 800MHz SMR, Verizon in that part of the country is Cellular
(800MHz). The lower the frequency the better the penetration of things like
buildings.

--
John S.
e-mail responses to - john at kiana dot net
 




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