Brocade Mobility Access Point System Reference Guide (Supporting software release 5.5.0.0 and later) User Manual
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Brocade Mobility Access Point System Reference Guide
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6
FIGURE 20
Advanced WLAN - Rate Settings 5 GHz-WLAN screen
7. For 5.0 GHz WLAN radio transmission rate settings, define the minimum Basic and Supported
rates in the 802.11a Rates, and 802.11n Rates sections. These rates are applicable to client
traffic associated with this WLAN only.
If supporting 802.11n, select a Supported MCS index. Set a MCS (modulation and coding scheme)
in respect to the radio’s channel width and guard interval. A MCS defines (based on RF channel
conditions) an optimal combination of 8 data rates, bonded channels, multiple spatial streams,
different guard intervals and modulation types. Clients can associate as long as they support basic
MCS (as well as non-11n basic rates).
802.11n MCS rates are defined as follows both with and without short guard intervals (SGI):
MCS Index
Number of Streams 20 MHz
No SGI
20 MHz
With SGI
40 MHz
No SGI
40MHz
With SGI
0
1
6.5
7.2
13.5
15
1
1
13
14.4
27
30
2
1
19.5
21.7
40.5
45
3
1
26
28.9
54
60
4
1
39
43.4
81
90
5
1
52
57.8
108
120
6
1
58.5
65
121.5
135
7
1
65
72.2
135
150