The Nurturing School Training Overview
In this training session, core staff members explore the Nurturing Schools project, discuss roles, expectations, and improvement plans. They cover topics like Nurture principles, communication, and staff support in creating a Nurturing School environment. The session also delves into the origins of Nurture, current research, and the significance of a Nurturing School. Theoretical underpinnings and practical applications are emphasized to enhance staff understanding and implementation.
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May 2024 Doc.: IEEE 802.11-24/0224r2 Discussion on A-PPDU follow-up Date: 2024-05-08 Authors: Affiliations Address Phone email Name Ross Jian Yu ross.yujian@huawei.com Ming Gan David Xun Yang Huawei Yan Xin Stephen McCann Submission Slide 1 Ross Jian Yu, et al Huawei Technologies
May 2024 Doc.: IEEE 802.11-24/0224r2 Recap In [1], three preferred modes are proposed: Other modes, for example, EHT+UHR, need further study, depending on the benefits of UHR features, when compared with a standalone EHT PPDU. 80 MHz 80 MHz HE PPDU HE PPDU (by UHR STA) (1) 80 MHz 80 MHz HE PPDU 160 MHz HE PPDU HE PPDU (by UHR STA) 160 MHz 160 MHz UHR PPDU UHR PPDU (a) (d) Opt (1) and (d) are proposed because large bandwidth OFDMA is optional for a non-EHT HE non-AP STA, and seldom applied. Submission Slide 2 Ross Jian Yu, et al Huawei Technologies
May 2024 Doc.: IEEE 802.11-24/0224r2 A-PPDU Q&A clarifications Q1: HE MU PPDU has to be used for PPDU alignment in DL. The use case is limited. Below are the replies: For HE 80 + HE 80, an HE SU PPDU can be used. If Only two users are scheduled, this can be frequently used. For HE + UHR, HE MU PPDU is needed. Case 1: HE MU PPDU is transmitted to two or more users. Case 2: HE MU PPDU is transmitted to one user (optional feature). Case 3: HE MU PPDU is transmitted to one user and one dummy user. Some spectrum is wasted, but can earn more spectrum back. This can also be frequently used. Q2: HE STAs are two generations away. Below are the replies: Legacy devices are used quite often, especially in home scenario. There is report forecasting $7.96 billion of Wi-Fi 6E devices market size by 2030 [2]. Wi-Fi 6 and Wi-Fi 6E devices keep increasing until 2025 (no data beyond that) [3]. Submission Slide 3 Ross Jian Yu, et al Huawei Technologies
May 2024 Doc.: IEEE 802.11-24/0224r2 TB A-PPDU in 11be In 802.11be, the trigger frame can enable an A-PPDU of HE TB PPDU and EHT TB PPDU whilst the spec disallows the AP to do that. Trigger frame 160 MHz HE TB PPDU EHT TB PPDU (BW=320MHz-1/2) 160 MHz Non-HT Duplicate B54 is set to 1 to indicate HE TB PPDU in P160, B55 is set to 0 to indicate presence of Special User Info field, which indicates EHT TB PPDU exists. Then in User Info field, B39 is set to 0 to indicate P160, which means HE variant User Info field, B39 is set to 1 to indicate S160, which means EHT variant User Info field. Submission Slide 4 Ross Jian Yu, et al Huawei Technologies
May 2024 Doc.: IEEE 802.11-24/0224r2 TB A-PPDU in 11bn If we allow a UHR AP can use the last two rows, then TB A-PPDU of HE TB PPDU and EHT TB PPDU is doable with no further efforts. HE non-AP STA and EHT non-AP STA can transmit HE TB PPDU, UHR non-AP STA can transmit EHT TB PPDU. EHT non-AP STA may also participate in EHT TB PPDU if there is no interoperability issue. Furthermore, if PHY Version Identifier is set to UHR, then TB A-PPDU of HE TB PPDU and UHR TB PPDU is straightly doable. Other modes need some further works. Submission Slide 5 Ross Jian Yu, et al Huawei Technologies
May 2024 Doc.: IEEE 802.11-24/0224r2 DL(non-TB) A-PPDU in 11bn DL A-PPDU is not discussed in detail in 11be. Within A-PPDU, each PPDU indicates its own bandwidth, with DSO or SST [1]. Moreover, the aggregated bandwidth, or exact bandwidth combinations may also be signaled (needs further study). HE MU- 1 HE-SIG-A BW=80MHz L-STF L-LTF L-SIG RL-SIG HE-SIG-B HE-STF HE-LTF Data PE HE MU- 2 HE-SIG-A BW=80MHz L-STF L-LTF L-SIG RL-SIG HE-SIG-B HE-STF HE-LTF Data PE UHR MU- 3 U-SIG BW=160MHz 80-80-160 UHR- STF L-STF L-LTF L-SIG RL-SIG UHR-SIG UHR-LTF Data PE Submission Slide 6 Ross Jian Yu, et al Huawei Technologies
May 2024 Doc.: IEEE 802.11-24/0224r2 Summary In this contribution, some questions from previous presentations are further clarified. Regarding the benefits, the cases of HE 80 + HE 80 and HE 160 + UHR 160 can double the Tput. The case of HE 80 + HE 80 + UHR 160 can result in a four times Tput gain. They can also reduce the latency. A-PPDU can be used together with dynamic subband operation (DSO) or subband selective transmission (SST). Submission Slide 7 Ross Jian Yu, et al Huawei Technologies
May 2024 Doc.: IEEE 802.11-24/0224r2 Straw Poll #1 Do you agree to include the following into the 11bn SFD? 11bn defines frequency domain aggregation of aggregated PPDUs. A frequency domain aggregated PPDU consists of multiple PPDUs. The PPDU format combinations include HE PPDU, other PPDUs are TBD. The number of PPDUs is TBD. Y N A Submission Slide 8 Ross Jian Yu, et al Huawei Technologies
May 2024 Doc.: IEEE 802.11-24/0224r2 Straw Poll #1 Do you agree to include the following into the 11bn SFD? 11bn defines frequency domain aggregation of PPDUs. A frequency domain aggregated PPDU consists of multiple PPDUs. The PPDU format combinations are TBD. The number of PPDUs is TBD. Y N A Submission Slide 9 Ross Jian Yu, et al Huawei Technologies
May 2024 Doc.: IEEE 802.11-24/0224r2 Straw Poll #2 Do you agree to include the following into the 11bn SFD? 11bn defines frequency domain aggregation of an 80 MHz HE PPDU and 80 MHz HE PPDU. Y N A Submission Slide 10 Ross Jian Yu, et al Huawei Technologies
May 2024 Doc.: IEEE 802.11-24/0224r2 Straw Poll #3 Do you agree to include the following into the 11bn SFD? 11bn defines frequency domain aggregation of a 160 MHz HE PPDU and 160 MHz UHR PPDU. Y N A Submission Slide 11 Ross Jian Yu, et al Huawei Technologies
May 2024 Doc.: IEEE 802.11-24/0224r2 Straw Poll #4 Do you agree to include the following into the 11bn SFD? 11bn defines frequency domain aggregation of an 80 MHz HE PPDU, 80 MHz HE PPDU and 160 MHz UHR PPDU. Y N A Submission Slide 12 Ross Jian Yu, et al Huawei Technologies
May 2024 Doc.: IEEE 802.11-24/0224r2 References 1. https://mentor.ieee.org/802.11/dcn/23/11-23-1865-01-00bn-discussion-on- sst-and-a-ppdu.pptx 2. https://www.industryarc.com/Research/wifi-6E-devices-market-research- 800237#:~:text=Wi%2DFi%206E%20Devices%20Market%20size%20is%2 0estimated%20to%20reach,devices%20that%20require%20wireless%20con nectivity 3. https://www.wi-fi.org/beacon/the-beacon/wi-fi-by-the-numbers-technology- momentum-in-2023 Submission Slide 13 Ross Jian Yu, et al Huawei Technologies
