Introduction
WLAN networks are operating
in non licensed band. As such they do not need frequency planning but also the
interference level is not controlled. A bad communication environment could
significantly to deteriorate the communication quality. Additionally to the
interference imposed limitation the 802.11 family products have limitations
when used for real time communication, like for example for voice
communication.
In this laboratory work we
measure the WLAN radio environment and particularly the channel data
throughput. The laboratory work contains two parts. In the first part we
investigate how the channel attenuation and IP packet size impact the total
throughput. In the second part we measure the quality of voice communication
over WLAN channel.
Material
Background material for the lab work
Laboratory exercises, hints for the part B
Links, downloadables, etc related to the laboratory exercise
The main background
information for this laboratory work is knowledge about the WLAN 802.11
standard.
Wikipedia page about WLAN. A general overview about WLAN standard.
Current 802.11 standards
can be accessed from here.
Mean Opinion Score.
Description of the metrics used for charging the VoIP connection quality. That
metric is defined in the ITU-T standard P.800.
WLAN course in
our laboratory. It contains useful material
for understanding the laboratory work. Unfortunately the course is
discontinued.
Updated
2-10-2009/Kru