Hello Sigurd,
> >
Was an alternative interpretation that a VHT AP is not required to support 2SS VHT PPDUs but is required to support 2SS HT PPDUs (as e.g. those instances above suggest) discussed?
> It wasn’t. While that would be a possibility, I strongly suspect we’d be creating backwards compatibility issues by assuming this now. It’s very likely that
VHT implementations exist that only implement single stream in both VHT and HT mode (e.g. mobile AP with single antenna).
OK.
> I looked at the other instances you found:
-
> 19.2.4 NOTE: To be consistent “AP” would have to be replaced with “AP that is not a VHT AP”. It would be even cleaner to remove the NOTE since it just
repeats a requirement given elsewhere.
OK to delete.
-
> Table 19-24: again, simply repeats (for information) the requirement found elsewhere. Either make it consistent or delete.
All PHYs have this kind of table. I've never quite understood what it's for,
but we can't just delete it here. So I think we need to make it consistent,
i.e. separate the VHT HT AP and non-VHT HT AP cases.
-
> HTP2.3.2.1 to HTP2.3.2.8: change condition from (CFHT AND CFAP) to (CFHT AND CFAP AND NOT CFVHT)
You also need to add a
(CFHT AND CFVHT AND CFAP):O
because otherwise it would be saying that a VHT HT AP is not allowed
to support 2SS, which isn't true.
Thanks,
Mark
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From: Sigurd Schelstraete [mailto:sschelstraete@xxxxxxxxxxxxx]
Sent: 08 May 2018 15:31
To: Mark Rison <m.rison@xxxxxxxxxxx>; Dorothy Stanley <dstanley1389@xxxxxxxxx>; STDS-802-11-TGM@xxxxxxxxxxxxxxxxx
Subject: RE: [STDS-802-11-TGM] [STDS-802-11] Updated TGmd agenda posted
Hi Mark,
You asked: “Was an alternative interpretation that a VHT AP is not required to support
2SS VHT PPDUs but is required to support 2SS HT PPDUs (as e.g. those instances above suggest) discussed?”
It wasn’t. While that would be a possibility, I strongly suspect we’d be creating backwards compatibility issues by assuming this now. It’s very likely that VHT
implementations exist that only implement single stream in both VHT and HT mode (e.g. mobile AP with single antenna).
I looked at the other instances you found:
-
19.2.4 NOTE: To be consistent “AP” would have to be replaced with “AP that is not a VHT AP”. It would be even cleaner to remove the NOTE since it just
repeats a requirement given elsewhere.
-
Table 19-24: again, simply repeats (for information) the requirement found elsewhere. Either make it consistent or delete.
-
HTP2.3.2.1 to HTP2.3.2.8: change condition from (CFHT AND CFAP) to (CFHT AND CFAP AND NOT CFVHT)
If that’s acceptable, we should add it to the resolution proposed for CID 1388. I favor deleting of the repeated requirements if they’re for information only.
Regards,
Sigurd
Oh yeah:
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From: Mark Rison [mailto:m.rison@xxxxxxxxxxx]
Sent: Tuesday, May 08, 2018 11:17 AM
To: Dorothy Stanley <dstanley1389@xxxxxxxxx>;
STDS-802-11-TGM@xxxxxxxxxxxxxxxxx; Sigurd Schelstraete <sschelstraete@xxxxxxxxxxxxx>
Subject: RE: [STDS-802-11-TGM] [STDS-802-11] Updated TGmd agenda posted
External Email
Hello,
I have the following comment on the resolution to CID 1388:
I think this is concluding that it is intentional that an HT AP
that is not a VHT AP is required to support 2SS, but an HT AP that
is also a VHT AP is only required to support 1SS.
This seems odd to me, but nonetheless, if that is the intent
then other parts of D1.0 are in conflict with this and will need
to be fixed, e.g.:
- 19.2.4: NOTE—Support of 20 MHz non-HT format and 20 MHz HT format
with one and two spatial streams is mandatory at APs.
- Table 19-24: MCS 0–15 for 20 MHz mandatory at AP
- B.4.17.2: HTP2.3.2.1-8: (CFHT AND CFAP):M
Was an alternative interpretation that a VHT AP is not required
to support 2SS VHT PPDUs but is required to support 2SS HT PPDUs
(as e.g. those instances above suggest) discussed?
Thanks,
Mark
Note: Pursuant to the notice at the end of this email, this email
is addressed to everyone involved in 802.11 work, and does
not contain protected information. Full dissemination,
distribution, copying and use is authorised.
--
Mark RISON, Standards Architect, WLAN English/Esperanto/Français
Samsung Cambridge Solution Centre Tel: +44 1223 434600
Innovation Park, Cambridge CB4 0DS Fax: +44 1223 434601
ROYAUME UNI WWW:
http://www.samsung.com/uk
From: ***** 802.11 REVm - Revision Maintainance List ***** [mailto:STDS-802-11-TGM@xxxxxxxx]
On Behalf Of Dorothy Stanley
Sent: 07 May 2018 20:08
To: STDS-802-11-TGM@xxxxxxxxxxxxxxxxx
Subject: Re: [STDS-802-11-TGM] [STDS-802-11] Updated TGmd agenda posted
--- This message came from the IEEE 802.11 Task Group M Technical Reflector ---
Thank you Sigurd.
TGmd members,
Please review the resolution proposed by Sigurd in 11-18-701r1, which incorporates
feedback from the discussion in PM1 today.
If there are no further comments, we'll proceed with the proposed revised resolution for CID 1359
in 11-18-701r1.
Dorothy
----------------------
Dorothy Stanley
IEEE 802.11 WG Chair, dstanley@xxxxxxxx
Hewlett Packard Enterprise
dorothy.stanley@xxxxxxx
dstanley1389@xxxxxxxxx
+1 630-363-1389
On Mon, May 7, 2018 at 8:57 AM, Sigurd Schelstraete <sschelstraete@xxxxxxxxxxxxx> wrote:
I have uploaded a new revision of document 701.
Regards,
Sigurd
From: Dorothy Stanley [mailto:dstanley1389@xxxxxxxxx]
Sent: Monday, May 07, 2018 11:57 AM
To: Sigurd Schelstraete <sschelstraete@xxxxxxxxxxxxx>
Subject: Re: [STDS-802-11] Updated TGmd agenda posted
External Email
Hello Sigurd,
Can you come to TGmd today PM1?
Thanks,
Dorothy
----------------------
Dorothy Stanley
IEEE 802.11 WG Chair, dstanley@xxxxxxxx
Hewlett Packard Enterprise
dorothy.stanley@xxxxxxx
dstanley1389@xxxxxxxxx
+1 630-363-1389
On Sun, May 6, 2018 at 11:23 PM, Sigurd Schelstraete <sschelstraete@xxxxxxxxxxxxx> wrote:
Hi Dorothy,
I uploaded document 701 a while ago with two resolutions that Mike assigned to me (CID 1388 and 1359).
Regards,
Sigurd
From: Dorothy Stanley [mailto:dstanley1389@xxxxxxxxx]
Sent: Sunday, May 06, 2018 11:27 PM
To: STDS-802-11@xxxxxxxxxxxxxxxxx
Subject: [STDS-802-11] Updated TGmd agenda posted
External Email
--- This message came from the IEEE 802.11 Working Group Reflector ---
The first TGmd time-slot is Monday PM1. Please let me know of any additional agenda requests.
Thanks,
Dorothy
----------------------
Dorothy Stanley
IEEE 802.11 WG Chair, dstanley@xxxxxxxx
Hewlett Packard Enterprise
dorothy.stanley@xxxxxxx
dstanley1389@xxxxxxxxx
+1 630-363-1389
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