New PHY Features for UHR MU PPDU Signaling in IEEE 802.11-24
Explore the latest developments in new PHY features and signaling for UHR MU PPDU in IEEE 802.11-24 standard. The proposal includes changes in UHR-SIG design, U-SIG encoding structure, and user-specific fields to accommodate advanced functionalities. Enhancements like UEQM patterns and new MCS configurations are detailed for improved performance.
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2024 November doc.: IEEE 802.11-24/1840r1 UHR MU PPDU User Info Field Signaling Date: 2024-11 Authors: Name Rui Cao Amer Al- Baidhani Hongyuan Zhang Affiliations NXP Address 350 Holger Way, San Jose, CA 95134 Phone email rui.cao_2@nxp.com amer.al-baidhani@nxp.com hongyuan.zhang@nxp.com Submission Slide 1 Rui Cao, etc. (NXP)
2024 November doc.: IEEE 802.11-24/1840r1 Introduction New PHY features are defined for UHR Unequal modulation New MCSs 2x1944 LDPC code Several contributions discuss about the UHR MU PPDU signaling the new features [1~5]. In this contribution, we proposes our preference of UHR-SIG design Submission Slide 2 Rui Cao, etc. (NXP)
2024 November doc.: IEEE 802.11-24/1840r1 Recap: UHR MU PPDU UHR-LTF UHR-Data UHR-STF UHR-SIG U-SIG L-STF LLTF L-SIG RL-SIG L-STF/LLTF/L-SIG/RL-SIG definition: no change U-SIG: keep the encoding structure Version-independent fields (B1:B19): PHY version identifier Version-dependent fields UHR-SIG: follow the same structure as EHT-SIG Common field: U-SIG over flow bits User specific field: changes needed to accommodate new features 1 Submission Slide 3 Rui Cao, etc. (NXP)
2024 May doc.: IEEE 802.11-24/1840r1 New Features UEQM: max four patterns per Nss Need 2-bits to indicate Total Nss 1st ss M M M M M M M M M 2nd ss M-1 M-2 M M M-1 M M M M-1 3rd ss 4th ss 2ss M-1 M-2 M-2 M M M-1 M-1 3ss M-1 M-2 M-2 M-2 4ss New MCSs: four new MCS QPSK-2/3, 16QAM-2/3, 16QAM-5/6, 256QAM-2/3 Expand current 4-bit to 5-bits 2x1944 code: 1-bit Submission Slide 4 Rui Cao, etc. (NXP)
2024 November doc.: IEEE 802.11-24/1840r1 User Field in UHR MU PPDU Proposal: UHR user info field, expands 22-bits to 23-bits Non-MUMIMO Allocation Beamforming B20 Coding B21 STA-ID B0-B10 MCS B11-B15 Nss UEQM B19 2x1944 B22 B16-B18 Modulation pattern B20-B21 New MCS: expand to 5-bit MCS and shrink Nss to 3-bit (8 Nss) UEQM: 1-bit UEQM + 2-bit (BF and coding/Modulation pattern) Bit 19 set to 0 (EQM) : B20 (Beamforming) and B21 (Coding) Bit 19 set to 1 (UEQM): B20-B21 (Modulation pattern) One bit to indicate 2x1944 code Submission Slide 5 Rui Cao, etc. (NXP)
2024 November doc.: IEEE 802.11-24/1840r1 Non-MUMIMO Allocation (2) Modulation pattern (B20-B21) B20-B21 Nss = 2 Nss = 3 Nss = 4 00 [M, M-1] [M, M, M-1] [M, M, M, M-1] 01 [M, M-2] [M, M, M-2] [M, M, M, M-2] 10 Reserved [M, M-1, M-2] [M, M, M-1, M-2] 11 Reserved Reserved [M, M-1, M-1, M-2] Submission Slide 6 Rui Cao, etc. (NXP)
2024 November doc.: IEEE 802.11-24/1840r1 MUMIMO Allocation STA-ID B0-B10 MCS B11-B15 Spatial configuration B16-B19 Reserved B20 Coding B21 2x1944 B22 MUMIMO mode does not define unequal modulation Expand to 5-bit MCS subfield Reduce Spatial Configuration bits from 6 to 4, limit Nss,tot = 8 same as HE-SIGB Spatial Configuration Table One bit to indicate 2x1944 code Submission Slide 7 Rui Cao, etc. (NXP)
2024 November doc.: IEEE 802.11-24/1840r1 UHR SIG: Common field U-SIG overflow bits for non-OFDMA transmission User info field increase to 23-bits SU transmission: good to keep UHR-SIG in two symbols for MCS0 Total overflow bits: 20 19 Spatial Reuse 4 GI+LTF size 2 Number of EHT-LTF symbols 3 LDPC extra symbol segment 1 UHR-SIG (U-SIG Overflow) Pre-FEC padding 2 PE disambiguity 1 Disregard 4 3 Number of Non-OFDMA Users 3 Total # of Overflow Bits 19 Submission Slide 8 Rui Cao, etc. (NXP)
2024 November doc.: IEEE 802.11-24/1840r1 Summary Propose UHR-SIG User info field design to indicate the new PHY features 23-bits user info field design of non-MUMIMO and MUMIMO allocation UHR-SIG U-SIG overflow bits for non-OFDMA transmission change to keep SU transmission to 2 symbols with MCS 0. Submission Slide 9 Rui Cao, etc. (NXP)
2024 November doc.: IEEE 802.11-24/1840r1 Reference [1] 11-24/1695, 11bn-signaling-design-for-extra-mcs- ueqm-2xldpc [2] 11-24/1427, signaling-for-mcs-and-ueqm-in-11bn [3] 11-24/1411, signaling-for-uhr-ppdu [4] 11-24/1431, a-unified-signaling-scheme-for-eqm-and- ueqm [5] 11-24-0876, uhr-ppdu-phy-version Submission Slide 10 Rui Cao, etc. (NXP)
2024 November doc.: IEEE 802.11-24/1840r1 SP1 Do you agree that the Disregard bits reduce from 4 bits to 3 bits in UHR-SIG common field for a non- OFDMA transmission? Note: other bits definition unchanged Submission Slide 11 Rui Cao, etc. (NXP)
2024 November doc.: IEEE 802.11-24/1840r1 SP2 Do you agree to define user info field for non- MUMIMO allocation in UHR MU PPDU as? Beamforming B20 Coding B21 STA-ID B0-B10 MCS B11-B15 Nss UEQM B19 2x1944 B22 B16-B18 Modulation pattern B20-B21 Submission Slide 12 Rui Cao, etc. (NXP)
2024 November doc.: IEEE 802.11-24/1840r1 SP3 Do you agree to define user info field for MUMIMO allocation in UHR MU PPDU as? STA-ID B0-B10 MCS B11-B15 Spatial configuration B16-B19 Reserved B20 Coding B21 2x1944 B22 Submission Slide 13 Rui Cao, etc. (NXP)
2024 November doc.: IEEE 802.11-24/1840r1 SP4 Do you support to include the following to the 11bn SFD? The four new MCSs are defined for both BCC and LDPC for UHR The four new MCSs are QPSK-2/3, 16QAM-2/3, 16QAM-5/6, 256QAM-2/3 Submission Slide 14 Rui Cao, etc. (NXP)
