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.
