Re: [STDS-802-11-TGAC] IEEE 802.11ac telecon
I will not be able to attend, but assuming 1021r3 will be presented, I
have the following comments thereon:
- I think "ensure that there is no more than one immediate response
required for an A-MPDU" in the first NOTE is a statement of the
blindingly obvious, and should be deleted. I also think "indicate"
should be changed to "ensure". The NOTE should read simply "NOTE---
All MPDUs transmitted within an MU PPDU are contained within A-MPDUs
and the rules specified in 8.6.3 (A-MPDU contents) ensure that there
can only be one immediate response to an MU PPDU."
- The figure should show BA/ACK rather than just BA in the green boxes
(for the reasons given in NOTE 1). The last of the three figures
shown (page 5) is correct.
- The NOTE 1 should just be a NOTE (since there's only one of them).
- "BAR frames" should be "BlockAckReq frames" (twice).
- "STA transmitting the MU PPDU" should be changed to "AP" (to match
the figure).
- "HT-delayed BlockAck" should be "HT-delayed Block Ack" (it's not the
frame, it's the behaviour).
- I think the baseline mostly calls for a "frame" after "A BlockAck or
an ACK" and "No BlockAckRequest".
- The case where none of the A-MPDUs in the MU PPDU requires immediate
acknowledgement is not covered. What happens in this case? Does a
BAR follow the MU PPDU after SIFS?
- I'm guessing the "should" in the "No BlockAckRequest should be sent
to a STA in the case where the A-MPDU to that STA contained no MPDUs
requiring acknowledgement." is to cover the case where although the
A-MPDU did not have any MPDUs requiring ack, the AP wants to get a
BA for some MPDUs sent earlier which do require ack. But this is
not clear and should be spelt out (perhaps another NOTE?).
Mark, who hadn't realised MU ack was such a can of worms!
--
Mark RISON, Systems Architect, Wi-Fi English/Esperanto/Francais
CSR, Cambridge Business Park Tel: +44 1223 692000
Cowley Road, Cambridge CB4 0WZ Fax: +44 1223 692001
ROYAUME UNI WWW: http://www.csr.com
> -----Original Message-----
> From: *** 802.11 TGac - VHT below 6GHz*** [mailto:STDS-802-11-TGAC@xxxxxxxx] On Behalf Of Osama
> AboulMagd
> Sent: 28 August 2012 13:04
> To: STDS-802-11-TGAC@xxxxxxxxxxxxxxxxx
> Subject: Re: [STDS-802-11-TGAC] IEEE 802.11ac telecon
>
> Hello All,
>
> There is a TGac conference call scheduled for Thursday, August 30 at 20:00 ET. Please let me know if
> you plan a presentation.
>
> Dial in information is available below.
>
> The latest revision of LB188 Comment spread sheet is available at:
> https://mentor.ieee.org/802.11/dcn/12/11-12-0752-08-00ac-lb188-comments-tgac-d3-0.xls
> <https://mentor.ieee.org/802.11/dcn/12/11-12-0752-08-00ac-lb188-comments-tgac-d3-0.xls>
>
> Teleconferences are bound by the conditions stipulated by the documentation below. Please review them
> and bring up any questions/concerns you may have before proceeding with the teleconference.
>
>
> *
> http://standards.ieee.org/resources/anthttp://www.ieee.org/web/membership/ethics/code_ethics.html
> <http://standards.ieee.org/resources/anthttp://www.ieee.org/web/membership/ethics/code_ethics.html>
> * http://standards.ieee.org/faqs/affiliationFAQ.htmlitrust-guidelines.pdf
> <http://standards.ieee.org/faqs/affiliationFAQ.htmlitrust-guidelines.pdf>
> * http://standards.ieee.org/board/pat/loa.pdf <http://standards.ieee.org/board/pat/loa.pdf>
> * http://standards.ieee.org/board/pat/index.html <http://standards.ieee.org/board/pat/index.html>
> * http://standards.ieee.org/board/pat/pat-slideset.ppt <http://standards.ieee.org/board/pat/pat-
> slideset.ppt>
> * http://standards.ieee.org/board/pat/faq.pdf <http://standards.ieee.org/board/pat/faq.pdf>
> * http://www.ieee802.org/policies-and-procedures.pdf <http://www.ieee802.org/policies-and-
> procedures.pdf>
> * http://www.ieee802.org/PNP/2008-11/LMSC_OM_approved_081114.pdf
> <http://www.ieee802.org/PNP/2008-11/LMSC_OM_approved_081114.pdf>
>
>
> Regards;
> Osama.
>
>
>
> -----Original Appointment-----
> From: Brian Hart (brianh) [mailto:brianh@xxxxxxxxx]
> Sent: Monday, July 23, 2012 12:15 PM
> To: Brian Hart (brianh); Reza Hedayat (rehedaya); Perahia, Eldad; Osama AboulMagd; Stephens, Adrian P
> Cc: Luoyi (Roy); auyehara@xxxxxxxxxxx; Daniel Camps Mur; mesem@xxxxxxxxxxxx
> Subject: IEEE 802.11ac telecon
> When: Thursday, August 30, 2012 8:00 PM-10:00 PM (UTC-05:00) Eastern Time (US & Canada).
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