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Re: [STDS-802-11-TGBE] [EXT] RE: Modified text of PDT-PHY-Packet-Extension



Hi Youhan,

 

  I am not propose any new capability.  Maybe my wording is not accurate for this statement” I don’t think the statement above indicates every non-AP STA has to support 20us PE duration since AP can schedule the non-AP STAs in EHT MU PPDU or EHT TB PPDU according to their PE support indications”. What I mean is Nominal packet padding value support.

 

Regards

Yan

 

From: Youhan Kim <youhank@xxxxxxxxxxxxxxxx>
Sent: Monday, December 14, 2020 9:32 PM
To: Yan(msi) Zhang <yan.zhang_5@xxxxxxx>; STDS-802-11-TGBE@xxxxxxxxxxxxxxxxx
Subject: [EXT] RE: Modified text of PDT-PHY-Packet-Extension

 

Caution: EXT Email

Hi, Yan.

 

Thanks for the update.

Non-AP STA support of transmit/receive 20us PE duration should be described in HE PHY capabilities subfield “Nominal Packet Padding”, and PPE Thresholds field section, as in 11ax. Besides, I don’t think the statement above indicates every non-AP STA has to support 20us PE duration since AP can schedule the non-AP STAs in EHT MU PPDU or EHT TB PPDU according to their PE support indications.

 

It sounds like you are proposing that 11be adds capabilities through which non-AP STAs declare what PE duration they support in “transmission”, and AP has the responsibility not to send Trigger frames w/ PE duration which the non-AP STA declares not to support (i.e., non-AP STAs with different PE TX capabilities cannot be grouped in the same UL OFDMA/MU-MIMO).  Is this correct?  There was no such capability in 11ax.  If that is your proposal, why do we need such new capability in 11be?

 

Regards,

Youhan

 

From: Yan(msi) Zhang <yan.zhang_5@xxxxxxx>
Sent: Monday, December 14, 2020 7:57 PM
To: STDS-802-11-TGBE@xxxxxxxxxxxxxxxxx
Subject: Re: [STDS-802-11-TGBE] Modified text of PDT-PHY-Packet-Extension

 

CAUTION: This email originated from outside of the organization.

Hi Ross,

   It is optional feature for both transmit/receive.

The duration of the PE field in EHT MU PPDU may take value of 20 µs for any modes with constellation > 1024 or NSS > 8 or RU > 2×996. 

[Motion 137, #SP268, [3] and [139]]

 

The EHT Nominal Packet Padding has two capability bits that are defined as follows.

Nominal Packet Padding

Encoding

0

Set to 0 if the nominal packet padding is 0 μs for all constellations, NSS and RU allocations the STA supports.

1

Set to 1 if the nominal packet padding is 8 μs for all constellations, NSS and RU allocations the STA supports.

2

Set to 2 if the nominal packet padding is 16 μs for all constellations, NSS and RU allocations the STA supports.

3

Set to 3 if the nominal packet padding is 16 μs for all modes with constellation ≤ 1024, NSS ≤ 8 and RU 2×996, and

20 µs for all other modes the STA supports.

[Motion 137, #SP269, [3] and [139]]

 

BR

Yan

From: Yujian (Ross Yu) <ross.yujian@xxxxxxxxxx>
Sent: Monday, December 14, 2020 7:19 PM
To: Yan(msi) Zhang <yan.zhang_5@xxxxxxx>; STDS-802-11-TGBE@xxxxxxxxxxxxxxxxx
Subject: 答复: Modified text of PDT-PHY-Packet-Extension

 

Hi Yan,

 

Could you remind me if we have any conclusion or discussion about the M/O of 20us PE reception or transmission? Thanks.

 

regards

于健 Ross Jian Yu

Huawei Technologies

 

发件人: Yan(msi) Zhang [mailto:yan.zhang_5@xxxxxxx]
发送时间: 20201215 11:13
收件人: STDS-802-11-TGBE@xxxxxxxxxxxxxxxxx
主题: [STDS-802-11-TGBE] Modified text of PDT-PHY-Packet-Extension

 

Hi all,

 

   Based on the comments raised regarding the allowed transmission modes with 20us PE duration. My modifications are highlighted in yellow.

 

A PE field of duration 20 µs is only allowed in an EHT PPDU with at least one participating STA being modulated with 4096-QAM, or in an EHT PPDU with more than 8 spatial streams transmitted on at least one RU/MRU, or in a 320 MHz EHT MU PPDU if the size of the one of the allocated RU or MRU is greater than 2x996, or in a 320MHz (TBD) EHT TB PPDU.

 

  I don’t think we need to talk about non-AP STA support of 20us transmit/receive in this section. Non-AP STA support of transmit/receive 20us PE duration should be described in HE PHY capabilities subfield “Nominal Packet Padding”, and PPE Thresholds field section, as in 11ax. Besides, I don’t think the statement above indicates every non-AP STA has to support 20us PE duration since AP can schedule the non-AP STAs in EHT MU PPDU or EHT TB PPDU according to their PE support indications.

 

  In this section, we just clarify what the specific properties are required for an EHT PPDU to be allowed to transmit with 20us PE duration.

 

  The statement an EHT PPDU with at least one participating STA being modulated with 4096-QAM, or in an EHT PPDU with more than 8 spatial streams transmitted on at least one RU/MRU covers EHT MU PPDU with OFDMA, or MU-MIMO, and EHT TB PPDU with OFDMA, or MU-MIMO, and EHT MU PPDU with only one STA.

 

  Please let me know if you have other concerns.

 

Thanks

Yan


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