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Jeganath
Beginner
1,035 Views

Intel(R) Wireless-AC 9560 160MHz reports incorrect RCPI for all 802.11k beacon measurement report

Hello,

This is Jeganath G T, from Technicolor connected Home Pvt Ltd.
We are leading Home Gateway routers and CPE manufacturers.

We use Dell Latitude 5591 STA with Intel 9590 wireless card runs Microsoft Windows 10 Enterprise (64-bit).
We use 802.11k beacon measurement feature for some of our software solutions.
We face issues related to 802.11k beacon measurement  in Intel 9560 cards, where RCPI for all 802.11k beacon measurement report is incorrect in report.

Below is the table from 802.11 2016 specification.

RCPI Description
0 Represents P < –109.5 dBm
1 - 219 Power levels in the range -109.5 < P< 0  are represented by  RCPI = [2 x  (P + 110) ]
220 Represents P> 0 dBm
221 - 254 Reserved
225 Measurement not available


The issue is that the 802.11k beacon measurement reports RCPI value for closely available BSS as very low and far away BSS as high value near to 220.

As per spec,
1) the High RCPI around 220 represents BSS with good signal strength.
2) the Low RCPI near to 0 represents BSS which is very far with poor signal strength.

 Intel(R) Wireless-AC 9560 160MHz reports RCPI in 802.11k in inverse way and violates spec.

We do not see this issue with other  STA like Samsung, Oneplus, redmi.

I am attaching  .text containing beacon response and .JPG file shows corresponding signal strength using InSSIDer.

Kindly provide some feedback about this issue.

Thanks,
Jeganath

0 Kudos
20 Replies
Jeganath
Beginner
982 Views

The same incorrect RCPI  in 802.11k beacon metrics is seen in Intel AX200  11ax wireless devices as well.

Maria_R_Intel
Moderator
966 Views

Hello Jeganath,


Thank you for posting on the Intel* Community.


To better assist you, please provide us the below information:


  • Can you please provide more details? Are you develop software for wireless devices?
  • How many systems are affected?
  • You said that it worked fine in different systems (like Samsung, Oneplus, Redmi) are those devices phones/tablets? Are you able to test this in a different computer/Laptop? If possible, provide the model, wireless card, and driver version.

 


Please run the following tool in Windows* and attach the report generated. 

  

Intel® System Support Utility (Intel® SSU) 

 

  • Intel® SSU Download
  • Open the application and click on "Scan" to see the system and device information. By default, Intel® SSU will take you to the "Summary View". 
  • Click on the menu where it says "Summary" to change to "Detailed View". 
  • To save your scan, click on "Next", then "Save". 


Best regards,

Maria R.

Intel Customer Support Technician


Jeganath
Beginner
952 Views

Hello Maria

We are developing software solution using Wifi-Alliance Easymesh standard for our Home wifi routers.
Our solution will assist WiFi stations for Seamless roaming across Multi APs. 
We use 802.11k beacon measurement report as key input parameter for our solution.

We tested our solution with Wifi devices like Samsung smartphones like S10, Note 2,  Oneplus 6 & 7, Redmi K20.

We used to get proper 802.11k beacon measurement report from the above mentioned Wifi devices.

We tried with two different Dell Laptops having Intel wireless (Ax200 and AC9560), we get incorrect 802.11k beacon measurement report.


Maria_R_Intel
Moderator
946 Views

Hello Jeganath,


My first recommendation is to have the system up to date.


Please, complete all the Windows* pending installations and updates.


I noticed that you are using the driver version 21.40.1.4. The best thing to do is using the drivers that are provided by the system manufacturer or via Windows Update to eliminate the potential impact caused by loading non-customized drivers (Intel's generic drivers that were not tested on your specific system). The system manufacturers regularly customize Intel generic drivers to meet the needs of their specific system design. In such cases, the use of the Intel generic driver update is not recommended.


Please, follow these steps to install the latest driver provided by Dell*.


Step 1: Download and save the latest driver, version  21.110.2.1.


Step 2: Uninstall the Wi-Fi driver.

  1. Go to Device Manager.
  2. Expand the Network Adapters category.
  3. Right-click your Intel Wireless Adapter and choose to uninstall it.
  4. Make sure to select the option to Delete the driver software for this device.
  5. Repeat steps A through D until the option to Delete the driver software for this device is greyed out.
  6. Restart your computer.


Step 3: Driver installation.

Locate the driver you downloaded back in Step 1 and install it.


After these steps, you can try the test again, please, let us know the outcome.


Best regards,

Maria R.

Intel Customer Support Technician


Jeganath
Beginner
936 Views

Hello Maria,

I see the same issue even with latest driver  21.110.2.1. from Dell site.

I feel that the issue is likely to present in all Intel wireless, because 802.11k is core of wireless and most of system manufacturers will not modify/change anything in such core area.

Let me know your thoughts.

Maria_R_Intel
Moderator
920 Views

Hello Jeganath,


Thank you for let us know.


We will proceed to check this internally, the thread will be updated as soon as we have more details to share.


Best regards,

Maria R.

Intel Customer Support Technician


DavidO_Intel
Moderator
887 Views

Hello @Jeganath ,

Your case has been escalated to engineering. Details will be sent by email.

Thank you,

David O

Jeganath
Beginner
867 Views

Thanks for reply.

Looking forward for reply from engineering team.

Jeganath
Beginner
826 Views

Hello David

 

Any feedback from engineering team?

Thanks,

 

DavidO_Intel
Moderator
818 Views

Hello @Jeganath 

I have sent a few emails to your email address. Could you please confirm if you have received them? 

I will send you a PM to confirm your address.

 

thanks

David O

Jeganath
Beginner
805 Views

Hello David,

Thanks for the reply.
I got mail about engineering status.

How do i reply back for such private mail?

Thanks,

DavidO_Intel
Moderator
767 Views

Thank you @Jeganath 

Will keep you updated.  Please check your email address for updates.

 

Thanks

David O.

DavidO_Intel
Moderator
712 Views

hello @Jeganath .

Please review your email for new updates on your case.

Thanks

David O

samooo
Beginner
676 Views

I have the same problem with Intel(R) Wireless-AC 9560 160MHz

DavidO_Intel
Moderator
654 Views

@Jeganath 

Hi, 

wondering if you have any updates about testing? 

Please let us know.

 

thanks

David O.

 

Jeganath
Beginner
529 Views

Hello David,

Unfortunately I didn't receive this email and further. I am not sure whether its firewall or something.
I was waiting for test driver.

If you can share the driver, i will try by tomorrow and provide result soon.

Thanks,
Jeganath G T

DavidO_Intel
Moderator
516 Views

@Jeganath 

Hi. No problem . Please check you private messages.

 

Thanks

David O.

Jeganath
Beginner
301 Views

Hi David,

Thanks for the effort.
I see the issue is fixed in the test driver.
I will continue monitoring further for issues.

Thanks,
Jeganath G T

Alberto_Sykes
Employee
567 Views

Hello Jeganath, I just wanted to check if you were able to test the driver, what were the results and if you need further assistance on this matter?


Regards,

Albert R.


Intel Customer Support Technician

A Contingent Worker at Intel


Alberto_Sykes
Employee
546 Views

Hello Jeganath, Since I have not heard back from you, we are closing the case, but if you have any additional questions, please post them on a new thread so we can further assist you with this matter.


Regards,

Albert R.


Intel Customer Support Technician

A Contingent Worker at Intel


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