An Investigation of the Impact of Signal Strength on Wi-Fi Link ...

AP at Position “E-3M”
Figure 5.9 shows <strong>the</strong> measurement results <strong>of</strong> distance, RSS and throughput when <strong>the</strong> AP
was located at position “E-3M”. With different AP locations, RSS and throughput may
also change at <strong>the</strong> same time. For example, RSS <strong>of</strong> measurement point “(C-2m)C-D”
was -63 dBm with a throughput <strong>of</strong> 10.325 Mbps when <strong>the</strong> AP was located at position
“E-3M” (refer table B.3). In <strong>the</strong> previous scenario (AP at position “G”) at <strong>the</strong> same
measurement point “(C-2m)C-D”, RSS was -70 dBm with a throughput <strong>of</strong> 7.566 Mbps
(refer table B.2). The results revealed that position <strong>of</strong> AP has an important impact on
RSS and throughput.
40
20
0
-20
-40
-60
-80
-100
Access Point at position "E-3m" : Distance/RSSI/Throughput
A B C D E F G H I L M J K N O P Q R S
RX Position
Figure 5.9: Distance/RSSI/Throughput for AP at position “E-3M”.
- 70 -
RSSI (dBm)
Throughput (Mbps)
Distance (meter)
Figure 5.10 shows throughput map <strong>of</strong> <strong>the</strong> AP when it was placed at position “E-3M”.
The throughput was adequate on <strong>the</strong> “left-hand side” and <strong>the</strong> center <strong>of</strong> <strong>the</strong> <strong>of</strong>fice.
However, throughput is still quite low in <strong>the</strong> corner <strong>of</strong> <strong>the</strong> “right-hand side” <strong>of</strong> <strong>the</strong> <strong>of</strong>fice