Does 88W9098 support VHT, 40MHz at 2.4GHz band

[Moore_Lin]

Dear sirs

About 88W9098, does it support VHT, 40MHz with uAP / STA mode at 2.4GHz band?

Thanks

Regards

Moore Lin

[Moore_Lin]

Hello @Christine_Li 

Thanks for your feedback. 

I have no more question about this case. 

you could close it. 

Thanks

Regards

Moore Lin

[Christine_Li]

Hi, @Moore_Lin 

Thanks for creating case to us.

I will check it and reply to you soon.

Best regards,

Christine.

[Christine_Li]

Hi, @Moore_Lin 

As you know, VHT is required STA works in 5GHz, not 2.4GHz.

So 88W9098 doesn't support VHT 40MHz at 2.4GHz, but support VHT 40MHz at 5GHz.

Best regards,

Christine.

[Moore_Lin]

Hello @Christine_Li 

Yes, we knew the 802.11ac VHT usually applied in 5GHz band. 

However, in 88W9098 data sheet (page2) , it note "88W9098 also supports 802.11ac capabilities in the 2.4GHz band" 

As we tested, the vht , 20MHz could be activated in 2.4ghz and linked with the other 88W9098. 

However, in vht 40MHz, it seems the ap mode still could be setup but sta could not link with it.

We would like to know if vht only support 20MHz in 2.4GHz band?

Thanks

Regards

Moore Lin

[Christine_Li]

Hi, @Moore_Lin 

Thanks for your reply.

I got your point, could you provide the related successful sniffer logs for VHT 20MHz in 2.4GHz and failed sniffer logs for VHT 40MHz in 2.4GHz to me for further checking?

Best regards,

Christine.

[Moore_Lin]

Hello @Christine_Li 

Could you please help to confirm if 88W9098 VHT could support 40MHz in 2.4GHz band ?

If yes, then we can setup again and  capture the log for you to see the issue?

If it's not supported, then we will not go on this topic. 

Thanks

Regards

Moore Lin

[Christine_Li]

Hi, @Moore_Lin 

Thanks for you reply.

Today, I checked it locally, and tried to set it to support VHT 40MHz in 2.4GHz, but seems there is no any VHT info in the association request frame(trying to connect to AP which is working in 2.4G 40MHz.).

May I know how did you check for 20MHz(You mentioned successfully in 2.4GHz 20MHz)? 

And also for your information, I escalated this issue into our internal AE team to ask further support. Once have any updates, I will let you know.

Best regards,

Christine.

[Christine_Li · Accepted solution]

Hi, @Moore_Lin 

I received our internal team's feedback as below:

======

We have discussed this topic and confirmed the VHT capability is not supported on the 2.4GHz, We are working internally to revise the datasheets.

=======

Please do not hesitate to let me know if you have any other concerns related to this topic.

Best regards,

Christine.

[Moore_Lin]

Hello @Christine_Li 

One more question, 

As you mentioned, the VHT is not supported in 2.4G and datasheet will be revised. 

Is this revise/change also put on 88Q9098?

Thanks

Regards

Moore Lin

[Christine_Li]

Hi, @Moore_Lin  

88W9098 and 88Q9098 follow the same SW, so yes It will be for both.

Best regards,

Christine.

[Moore_Lin]

Hello @Christine_Li 

Thanks for confirmation. 

Does it means the VHT 20MHz we now succeed to activated will be disabled in future firmware?

Regards

Moore Lin

[Christine_Li]

Hi, @Moore_Lin 

Can you please let me know which release you verified VHT 20MHz in 2.4GHz?

So that we can track internally and give you an answer about this.

Best regards,

Christine.

[Moore_Lin]

Hello @Christine_Li 

The driver I used for vht 20/40 test is 

PCIE-WLAN-UART-BT-9098-U16-X86-17.68.1.p136.19-17.26.1.p136.19-MXM5X17366_P7_V0V1-MGPL

Thanks

Regards

Moore Lin

[Christine_Li]

Hi, @Moore_Lin 

Sorry for my late reply because of our internal India team is in public Diwali holiday last week.

I received our internal team's feedback as below:

The release now you are using(PCIE-WLAN-UART-BT-9098-U16-X86-17.68.1.p136.19-17.26.1.p136.19-MXM5X17366_P7_V0V1-MGPL) is very old(Released in 2022).

Can you please help verify with the latest release(PCIE-WLAN-UART-BT-9098-U16-X86-17.68.1.p149.50-17.26.1.p149.50-MXM5X17405_P40_V0V1-MGPL)?

VHT is already disabled in 2.4 GHz in most recent releases.

Best regards,

Christine.

[Christine_Li]

Hi, @Moore_Lin 

I just double confirmed with our internal team, 

20 MHz VHT is also disabled for 2.4 GHz in our recent release. The feature is disabled from FW side.

Please let me know whether have any other concerns on this case.

Other wise, I will close this ticket for now.

Please feel free to create new case to us if you need any help from us in the future.

Have a nice day~

Best regards,

Christine.