H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 507)

486
Item Description
802.11b
Configure rates (in Mbps) for 802.11b.
By default:
• Mandatory rates—1 and 2.
• Supported rates—5.5 and 11.
• Multicast rate—Automatically selected from the mandatory rates. The transmission
rate of multicasts in a BSS is selected from the mandatory rates supported by all the
clients.
802.11g
Configure rates (in Mbps) for 802.11g.
By default:
• Mandatory rates—2, 5.5, and 11.
• Supported rates—6, 9, 12, 18, 24, 36, 48, and 54.
• Multicast rate—Automatically selected from the mandatory rates. The transmission
rate of multicasts in a BSS is selected from the mandatory rates supported by all the
clients.
Configuring 802.11n MCS
Introduction to MCS
Configuration of mandatory and supported 802.11n rates is achieved by specifying the maximum
Modulation and Coding Scheme (MCS) index. The MCS data rate table shows relations between data
rates, MCS indexes, and parameters that affect data rates. Sample MCS data rate tables for 20 MHz
and 40 MHz are shown in Table 150 and Table 151 , respectively. For the entire table, see IEEE P802.11n
D2.00.
Table 150 and Table 151 indicate that MCS 0 through 7 are for one single spatial stream, and when the
MCS is 7, the data rate is the highest. MCS 8 through 15 are for two spatial streams, and when the MCS
is 15, the data rate is the highest. For the whole table, see IEEE 802.11n-2009.
Support for MCS indexes depends on the device model.
Table 150 MCS index table (20 MHz)
MCS index
Number of
spatial streams
Modulation
Data rate (Mbps)
800ns GI
400ns GI
0 1 BPSK 6.5 7.2
1 1 QPSK 13.0 14.4
2 1 QPSK 19.5 21.7
3 1 16-QAM 26.0 28.9
4 1 16-QAM 39.0 43.3
5 1 64-QAM 52.0 57.8
6 1 64-QAM 58.5 65.0
7 1 64-QAM 65.0 72.2
8 2 BPSK 13.0 14.4
9 2 QPSK 26.0 28.9