Hi Genadiy,
Thanks for feedback.
No worries. Alfred put this contribution in next week joint meeting queue. We have some time.
J
In MAC, I don’t know whether we can use “Validate” or not.
Currently my proposed resolution is as follows.
Revised.
16 antennas will be supported in 11be release 2. The size of Nc and Nr in 11be release 1 is just for reserving space for future extension.
Rather than defining “Order of angels in the compressed beamforming feedback matrix” for 16 antennas, we can limit Nr and Nc index up to 7.
In addition, we can modify Nc subfield in NDP-A to Nc Index subfield which cause some confusion. Note that in VHT NDP announcement frame, it is Nc index.
Note that I have following proposed modification in MIMO Control.
Table 9-91i—EHT MIMO Control field encoding
|
Subfield |
Description |
|
Nc Index |
If the Feedback Type subfield indicates SU or MU, the Nc Index subfield indicates the number of columns in the compressed beamforming feedback matrix minus 1,
Nc – 1(#1639).
If the Feedback Type subfield indicates CQI, the Nc Index subfield indicates the number of
spatialstreams,
Nc, in the CQI report and is set to Nc – 1.
The valid range of Nc Index is from 0 to 7. (#1639) |
|
Nr Index |
If the Feedback Type subfield indicates SU or MU, the Nr Index subfield indicates the number of rows in the compressed beamforming feedback matrix minus 1Nr
– 1(#1639). The value 0 is reserved.
If the Feedback Type subfield indicates CQI, then the Nr Index subfield is reserved.
The valid range of Nr Index is from 1 to 7. (#1639) |
Do you want to additional restriction on Nc value in NDP-A as in red text?
In a
broadcast EHT
NDP Announcement
frame that
has more
than one
STA Info
field, the following applies:
— If
the Feedback
Type And
Ng subfield
and the
Codebook Size
subfield indicate
SU or
MU, the
Nc Index subfield indicates the number of columns in the compressed beamforming feedback matrix minus 1Nc
– 1. The valid range of Nc Index is from 0 to 7. (#1639)
— If
the Feedback
Type And
Ng subfield
and the
Codebook Size
subfield indicate
CQI, the
Nc Index subfield indicates the number of spatial streams in the CQI report minus 1Nc
– 1. The valid range of Nc Index is from 0 to 7. (#1639)
Best regards,
Wook Bong Lee
From: Genadiy Tsodik(TRC) [mailto:genadiy.tsodik@xxxxxxxxxx]
Sent: Tuesday, March 2, 2021 11:29 PM
To: Wook Bong Lee <wookbong.lee@xxxxxxxxxxx>; STDS-802-11-TGBE@xxxxxxxxxxxxxxxxx
Subject: RE: [CR-Joint] spatial stream and mimo enhancement
Hi Wook Bong,
Sorry for the late response.
I have suggestion for CID #1639 to define the values of Nc Index and Nr Index fields from 8 to 15 as Validate.
It will be consistent with other spec definitions (e.g. values 6-7 of BW field in U-SIG).
BTW, although this CID refers only to EHT MIMO Control Field, I think we can add same definition for Nc Index field in NDP-A.
Thanks.
Genadiy Tsodik
Algorithm Expert
Huawei TLV Research Center
Office: +972-74-7198101 | Mobile: +972-526773161 | fax: +972-9-9511218
From: Wook Bong Lee [mailto:wookbong.lee@xxxxxxxxxxx]
Sent: Saturday, February 27, 2021 12:31 AM
To: STDS-802-11-TGBE@xxxxxxxxxxxxxxxxx
Subject: [STDS-802-11-TGBE] [CR-Joint] spatial stream and mimo enhancement
Hi all,
I just uploaded CR for spatial stream and MIMO enhancement.
It includes proposed resolutions for 22 CIDs,
- 1094, 1103, 1115, 1120, 1487, 1493, 1639, 1641, 1939, 2221, 2222, 2223, 2224, 2225, 2226, 2227, 2228, 2229, 2941, 3124, 3125, 3242
Since there are two accepted PDTs,
11-21/0011r9 and
11-21/0137r4, which are not reflected in the draft yet, I included all those in the 11-21/0272r0.
All the proposed resolutions have a tag (#CID), so you can look at those changes only as well.
Please feel free to give your feedback.
Best regards,
Wook Bong Lee
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