Hi,
First of all thanks alot for your fast response.
You have said that :
"To answer your question: NO, it is absolutely not realistic to deduce
from a result of 150m transmission range to be in an indoor scenario."
Do you mean that I cannot assume an indoor range to be 150m, or I cannot
assume that an infrastructured network is working in an indoor environment?
The point that I want to get to, is that in the standard it is specified that
the maximum transmit power for 802.11a cards in the range 5.725-5.825 GHz can
reach 800 mW, following this can I assume a range of 150m (for example) for a
card using 600 mW as its transmit power, apart from the propagation model or
lets say I am working with TwoRayGround model, can I assume this or one can
argue that my simulation settings are not real?
Thanks again and waiting your reply,
gaby
Daniel Mahrenholz <[EMAIL PROTECTED]> wrote:
Hi,
Gabrial Monty schrieb:
> I have to simulate an infrastructured wireless network behavior using
> different wireless cards specifications. I want to test the network
> performance using 802.11a cards with high transmit power level (not less than
> 600 mW). I have choosen the XtremeRange5 card but what I have realized is
> that its outdoor range is over 50 km and it indoor range is 150 m, during
> simulation if two nodes are further than 150 m the link throughput is 0, so
> is it realistic to assume that I deal with indoor networks? what I mean I am
> dealing with similar networks topology to wireless mesh networks, can I
> assume this network to be indoor and apply this NIC card specifications
Basically there is no difference if you increase the transmission power
or use a high gain antenna. So, apart from the transmission power, the
sensitivity of the transceiver is what makes the most important
difference between two wireless cards.
Before you proceed with your work you should read something about
wireless propagation. Just as an example, an outdoor range of 50km is
only possible if the transmitter is placed high enough above ground.
Otherwise you will not have a free line of sight and fresnel zone. When
I remember right, for 50km distance the transmitter needs to be placed
about 80m above ground. The environment defines how the transmitted
signal is attenuated. Just imaging you are inside a metal elevator -
then you probably get an "indoor range" of 1m.
To answer your question: NO, it is absolutely not realistic to deduce
from a result of 150m transmission range to be in an indoor scenario.
I suggest that you start by selecting a propagation model that mimics
the effects experienced in an indoor environment (e.g. multipath
propagation, shadowing, interference ...). If you have such a
propagation model, you can start to investigate effects caused by the
transmission power, cars specification, protocol ... whatever you like.
Hope that gets you started,
Daniel.
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