To see how the 834B handled mixed draft 11n and 11g clients, I set up a second notebook with a Linksys WPC54G V3 11b/g card (Broadcom chipset). Both it and the Netgear WN511B were associated with the 834B, which I set to its default 20 MHz bandwidth mode. I then ran two IxChariot throughput.scr streams, alternating the STA that got on the air first.
Figure 18 shows how uplink throughput was shared when the 11n pair started first, while Figure 19 shows the 11g pair starting first.
Figure 18: Mixed 11n, 11g STAs - Uplink, N starts first
Results were very similar to those obtained with the 845T. Figure 19 shows that best-case 11g throughput is knocked down to about 5 Mbps from its normal 22 Mbps or so, or about 75%. The 11n pair's throughput hit is only about 40%.
Figure 19: Mixed 11n, 11g STAs - Uplink, G starts first
I also ran these tests in downlink and saw similar behavior, but with only a 50% throughput reduction of the 11g STA (Figure 20).
Figure 20: Mixed 11n, 11g STAs - Downlink, G starts first
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