Transcript https://mentor.ieee.org/802.11/dcn/14/11-14-0424-00-0hew-hew-sg-par-and-csd-comments-and-resolutions.pptx

March 2014
doc.: IEEE 802.11-14/0424r0
HEW SG PAR and CSD Comments and
Resolutions
Date: 2014-03-18
Authors:
Name
Affiliations
Address
Osama AboulMagd
Huawei
Technologies
303 Terry Fox Drive 613-287-1405
Ottawa, ONT,
CANADA
Submission
Slide 1
Phone
email
Osama.aboulmagd@huaw
ei.com
Osama Aboul-Magd, Huawei Technologies
March 2014
doc.: IEEE 802.11-14/0424r0
Abstract
This submission include comments related to HEW SG
proposed PAR and CSD, and SG response to these
comments
Submission
Slide 2
Osama Aboul-Magd, Huawei Technologies
March 2014
doc.: IEEE 802.11-14/0424r0
Comments from Bob Grow
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•
•
•
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IEEE P802.11tbd HEW (High Efficiency WLAN) Non substantive comments on
the PAR.
Draft PAR: <https://mentor.ieee.org/802.11/dcn/14/11-14-0165-00-0hew-802-11hew-sg-proposed-par.docx>
1. Did notice that the Abstract per the 802.11 document is for CSD, but not
important for EC consideration.
2. As the provided draft does not appear to be from myProject, I assume it hasn't
been presubmitted, if it had been submitted, then the supplied material should be
myProject output. (The dates are an indicator -- PAR date empty, and approval
and expiration dates filled in. But, the approval date can only be achieved if it was
presubmitted.)
The PDF file is attached.
3. 4.3 will likely raise comment from NesCom (planning on an extension on initial
submittal), but I prefer honesty rather than avoiding NesCom comment.
The projected completion date is changed to March 2018
Submission
Slide 3
Osama Aboul-Magd, Huawei Technologies
March 2014
doc.: IEEE 802.11-14/0424r0
Comments from Bob Grow
• 4. 5.1 appears to be the number of WG members, not the number
of people on the project.
• Based on HEW SG attendance 200 is the expected number of
people participating in 802.11ax. The total number of 802.11
voting members is 332.
• 5. 5.2b second paragraph, missing space (This amendment).
• We accept the comment and we’ve already made the necessary
edits.
• 6. 5.5 typo in 5th line of first paragraph "( ".
• We accept the comment and we’ve already made the necessary
edits.
• Draft CSD: <https://mentor.ieee.org/802.11/dcn/14/11-14-0169-000hew-ieee-802-11-hew-sg-proposed-csd.docx
Submission
Slide 4
Osama Aboul-Magd, Huawei Technologies
March 2014
doc.: IEEE 802.11-14/0424r0
Comments from Mark Hamilton (1/2)
•
I am wondering about the band restrictions. To quote from the draft PAR: “This
amendment defines operations in frequency bands between 1 GHz and 6 GHz.” It
was confirmed at the plenary that the intent is to not cover the TV white space
bands. These leads me to two questions:
–
The PAR talks about making changes to both/either MAC and PHY. If the MAC is changed,
how are those changed envisioned to be band-specific? This seems to me to be some
combination of cumbersome in the text (a lot of added “If such-and-such MIB attribute is true”
language around all of the changes), and complex and unnecessary restriction in
implementations to only use the new features if the specified bands are in use.
•
–
If there are changes to the PHY, for example the 11ac PHY (which is specifically called out as
focus for the improvements, per the PAR), will those changes not be reflected in the 11af PHY
(which is currently an intentional “copy” of the 11ac PHY)? This again seems unnecessary and
an unfortunate complication for implementations.
•
Submission
MAC specifications may be general or specific for a certain PHY, e.g. MAC extensions for MU
MIMO are specific for 11ac. The group will strive to make additional MAC features general.
A new PHY clause wouldn’t be reflected in 11af. Future evolution to 11af can extend 802.11ax
features to white spaces. As a recent example, IEEE802.11 ac extended the 11n features to 5 GHz
only.
Slide 5
Osama Aboul-Magd, Huawei Technologies
March 2014
doc.: IEEE 802.11-14/0424r0
Comments from Mark Hamilton (2/2)
•
•
I also wonder about the language discussing mobility.
–
The PAR has this bullet: “Outdoor operation is limited to stationary and pedestrian speeds.” (In
the section 5.2.b extended comments at the bottom – which is an excellent addition, by the way
– this made the PAR one of the most clear about its intent in recent memory!) There seems to
be no matching discussion of indoor operation while mobile.
–
Between the above sentence, and the specific mention of mobile devices as a target stakeholder,
I am assuming that some aspect of mobility is being considered as part of the problem set of the
scope. Although, I don’t see any other discussion that clarifies this. (As many of you know, I
am very interested in mobility performance, and would like to understand if there is overlap or
other relationship to the proposed work.) If mobility factors are to be considered, I believe
more language describing that is needed in the PAR. If mobility is not going to be considered, I
don’t understand the discussion of (outdoor) mobility speeds, and suggest that bullet be
changed to say that mobility is not being considered.
The PAR doesn’t address mobility (BSS transition, vehicular speed)
Submission
Slide 6
Osama Aboul-Magd, Huawei Technologies
March 2014
doc.: IEEE 802.11-14/0424r0
IEEE 802.22 WG Comments
• There are many acronyms that are not defined. E. g. CAGR in the
CSD Document
• We accept the comment and we’ve made the necessary editorial
changes.
• •Typo: “Thisamendment” in the Scope of the Project
• Section 5.2.b
• We accept the comment and we’ve made the necessary editorial
changes.
Submission
Slide 7
Osama Aboul-Magd, Huawei Technologies
March 2014
doc.: IEEE 802.11-14/0424r0
References
• •The frequency range of operation for this standard should be
refined. 1 GHz to 6 GHz seems to be quite broad.
• •Suggestion – The focus of this amendment is on WLAN indoor
and outdoor operation in the 2.4 GHz and the 5 GHz frequency
bands. Additional bands between 1 GHz and 6 GHz may be added
as they become available.
• Current 802.11 spec consider bands from sub 1GHz up to 60 GHz.
This amendment will focus on a subset of the current range of
frequencies. Moreover the suggested changes are captured in the
explanatory notes.
• Section 5.5 –
• Please define what 5th percentile is.
• Editorial changes were made to clarify the sentence.
Submission
Slide 8
Osama Aboul-Magd, Huawei Technologies