The Wi-Fi throughput is worse than the expect result on nRF7002

[Sudhakar V]

Hi,

I want to run the throughput test under Coexistence condition with Separate  and Shared antenna. These tests were run with WLAN  connected to an AP in 5 GHz band, 802.11n and 802.11ac mode  According to the  nRF7002 Product specification document  it says that for 20 MHz wide channels can deliver a PHY data rate of 86 Mbps (MCS7). but We are not able to achieve the data throughput performance.  We getting very low throughputs  i.e.., (20 to 22) Mbps only.

I follow the test steps as sr_coex sample. ( https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/samples/wifi/sr_coex/README.html )

THANKS IN ADVANCE,

YOUR HELP IS MUCH APPRICIEATED,

V Sudhakar.

[Marte Myrvold]

Hi,

According to the  nRF7002 Product specification document  it says that for 20 MHz wide channels can deliver a PHY data rate of 86 Mbps (MCS7)

86 Mbps is the data rate for the PHY layer, but this will not be the same as the application throughput. The application throughput will be affected by several factors such as QSPI throughput, what type of data is transferred, the network stack and test environment.

What the sr_coex sample shows is the UDP throughput, but the 802.11 protocol has some overhead, such as the MAC header, IP header and UDP header. So the actual UDP data is just a part of the whole packet. This means that if you have a PHY data rate of 86 Mbps, only part of this data will be the UDP data, and thus the UDP throughput will be lower than the PHY data rate.

Best regards,
Marte

[Sudhakar V]

Hi,

I want to test the PHY data rate of 86 Mbps (MCS7), could you please suggest me is there any specific sample available or if any configurations are required?

Your guidance on the necessary steps for testing would be greatly appreciated,

THANKS IN ADVANCE,

V Sudhakar

  

[Marte Myrvold]

Hi,

Can you explain the reason for why you want to test the PHY data rate?

Best regards,
Marte

[Sudhakar V]

Hi,

Because I want to check  maximum throughputs in nRF7002DK.

[Marte Myrvold]

Hi,

Maximum throughput of what? The PHY data rate is not representative of what you will see in the application, so it would be more useful to test the throughput of the application layer.

If you want to test PHY data rate you need to perform RF testing.

Best regards,
Marte