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CC3301: Lower throughput than expected

Part Number: CC3301
Other Parts Discussed in Thread: BP-CC33-BBB-ADAPT, , BEAGL-BONE-BLACK

Hello,

during throughput test were expecting ~50Mbps speed for all modes, unfortunalety we have results as below:

iperf3 -c 192.168.1.123 -b 100M                    33Mbps
iperf3 -c 192.168.1.123 -b 100M -w 256K      33-34Mbps
iperf3 -c 192.168.1.123 -b 100M -R                27Mbps

iperf3 -c 192.168.1.123 -u -b 100M                51Mbps
iperf3 -c 192.168.1.123 -u -b 100M -R           35-36Mbps

Only for UDP mode in, one direction we were exceeding 50 Mbps. The test has been performed with the old Linksys AP which supports 802.11n mode only. BLE was not used. No modifications in SDK were done.

We tested in normal conditions as well as in a silent RF chamber. We tested EVB also with embedded and next external antenna, without any spectacular improvements. The question is what may be the reason for that and how we can increase throughput numbers.

The test was done on your EVBs + Beagle Bone ( BEAGL-BONE-BLACK + BP-CC33-BBB-ADAPT + BP-CC3301 )

The system reports such status after connection establishment:

root@am335x-evm:~# iw dev wlan0 link
Connected to 24:f5:a2:ab:84:56 (on wlan0)
        SSID: Linksys01549
        freq: 2427
        RX: 823253 bytes (8615 packets)
        TX: 25157375 bytes (16603 packets)
        signal: -17 dBm
        rx bitrate: 65.0 MBit/s MCS 7
        tx bitrate: 65.0 MBit/s MCS 7

        bss flags:      CTS-protection short-preamble short-slot-time
        dtim period:    1
        beacon int:     100
root@am335x-evm:~#

Thank you for help.

Regards,

Robert