Cisco Cisco Aironet 3500i Access Point Libro blanco
Copyright © 2010 Miercom
Cisco CleanAir Competitive
Page 7
Test Results
Impact of Interference
Tests were performed to determine what the impact was on performance from different types of
non-Wi-Fi signals. The client was an 802.11n laptop and a Cisco 3500 served as the access
point. Baseline throughput was measured in clean spectrum on a 40 MHz channel in the 5 GHz
band. Individual interference signals were turned on and the throughput measurement was
taken. Multiple runs were performed to obtain an average. Baseline throughput was 164.8 Mbps
on the clean spectrum.
non-Wi-Fi signals. The client was an 802.11n laptop and a Cisco 3500 served as the access
point. Baseline throughput was measured in clean spectrum on a 40 MHz channel in the 5 GHz
band. Individual interference signals were turned on and the throughput measurement was
taken. Multiple runs were performed to obtain an average. Baseline throughput was 164.8 Mbps
on the clean spectrum.
When a 5GHz wireless video surveillance camera was activated, Channel 153 was jammed with
continuous wave interference and the client was knocked off the air. Network throughput was
0% while the video camera was operating.
continuous wave interference and the client was knocked off the air. Network throughput was
0% while the video camera was operating.
We used 5GHz DECT to record the signaling impact of frequency hopping. We used three
phones: two were conferenced, and one was the base station connected to a landline. With
three phones in use, network throughput dropped to 102 Mbps, and the AP measured an air
quality of 86% out of a 100% for the 5GHz.
phones: two were conferenced, and one was the base station connected to a landline. With
three phones in use, network throughput dropped to 102 Mbps, and the AP measured an air
quality of 86% out of a 100% for the 5GHz.
See
Figure 1
for the 5.0GHz baseline values.
Figure 1: 5.0GHz Baseline Measurements with Impact of Interference on Throughput
Baseline measurement comparison with Cordless Phone and Video Camera
164.8
101.8
0.0
0.0
25.0
50.0
75.0
100.0
125.0
150.0
175.0
5GHz Baseline
Cordless
Phone
Video Camera
TC
P Thr
o
ughpu
t (
M
bps
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