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Re: [STDS-802-11-TGM] Do S1G STAs do SPP?

--- This message came from the IEEE 802.11 Task Group M Technical Reflector ---
Hi Mark,

On Wed, Mar 16, 2022 at 6:21 PM Mark Rison <m.rison@xxxxxxxxxxx> wrote:

Hello Dave,

 

>> A question arose in the TGme session yesterday: do S1G STAs always send A-MSDUs as SPP A-MSDUs (like DMG STAs, but unlike HT STAs)?

A-MSDU support is optional for S1G STAs. SPP A-MSDU is optional for an S1G STA that supports A-MSDUs. I think that is the case for all non-DMG STAs.

 

OK, let me make my question clearer:

 

If an S1G STA sends an A-MSDU, does it always send it as an SPP A-MSDU

(if encryption is enabled, of course)?

 


The answer is not necessarily, since it depends on the setting of the SPP capable and SPP required bits in the RSN capabilities field. As I answered previously, SPP A-MSDU is optional for S1G and all other STAs except DMG STAs. If an S1G STA implements A-MSDU then it acts the same as a VHT STA, for example. There is no difference in behavior for S1G STAs vs other non-DMG STAs in this area as far as I can see.
 

>> If they don't, does anyone actually implement SPP A-MSDUs in S1G STAs?

 

Unknown. As far as I know, industry is not yet conducting interoperability testing for S1G support of A-MSDUs. If/when that happens SPP A-MSDUs will probably be the requirement.

 

Well, the alternative question is: do S1G STAs use the SPPR and SPPC

bits in the RSN Capabilities field to determine whether, if A-MSDUs

are used, these are SPP A-MSDUs or not?


Yes, the behavior is the same as for any non-DMG STA.
 

 

The above comments apply to PV0 frames. I'm not sure what the context was for the discussion in TGme. Why are we picking on S1G in particular? :-)

 

Because the rules are clear for HT STAs (look at the bits to determine

whether SPP) and DMG STAs (always SPP) but not for other STAs.

 


The original 802.11ah-2016 text did specifically reference HT STAs but that seems to have been removed in the latest 802.11me draft. What part of the current 802.11me draft are you referring to?

- Dave

 

Thanks,

 

Mark

 

--

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: David Goodall <dave@xxxxxxxxxxxxxx>
Sent: Wednesday, 16 March 2022 03:35
To: STDS-802-11-TGM@xxxxxxxxxxxxxxxxx
Subject: Re: [STDS-802-11-TGM] Do S1G STAs do SPP?

 

--- This message came from the IEEE 802.11 Task Group M Technical Reflector ---

>> A question arose in the TGme session yesterday: do S1G STAs always send A-MSDUs as SPP A-MSDUs (like DMG STAs, but unlike HT STAs)?

 

A-MSDU support is optional for S1G STAs. SPP A-MSDU is optional for an S1G STA that supports A-MSDUs. I think that is the case for all non-DMG STAs.

 

>> If they don't, does anyone actually implement SPP A-MSDUs in S1G STAs?

 

Unknown. As far as I know, industry is not yet conducting interoperability testing for S1G support of A-MSDUs. If/when that happens SPP A-MSDUs will probably be the requirement.

 

The above comments apply to PV0 frames. I'm not sure what the context was for the discussion in TGme. Why are we picking on S1G in particular? :-)

 

If it relates to CID 1555, which concerns A-MSDUs in an S1G PV1 frame, then I think there are definitely issues for A-MSDUs in that context but that is a separate discussion.

 

- Dave

 

On Tue, Mar 15, 2022 at 11:59 PM M Montemurro <montemurro.michael@xxxxxxxxx> wrote:

Copying the TGm reflector

 

On Tue, Mar 15, 2022 at 5:40 AM Mark Rison <m.rison@xxxxxxxxxxx> wrote:

Hello,

 

A question arose in the TGme session yesterday: do S1G STAs always

send A-MSDUs as SPP A-MSDUs (like DMG STAs, but unlike HT STAs)?

 

If they don't, does anyone actually implement SPP A-MSDUs in S1G STAs?

 

Thanks,

 

Mark

 

--

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

 



--

Dave Goodall

Morse Micro

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--
Dave Goodall
Morse Micro

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