IEEE 802.11-18/0791r0 FDMA MU Wakeup Operations Summary
"Explore the FDMA MU Wakeup Operations in IEEE 802.11-18/0791r0 document, detailing channel access procedures, wakeup signal transmission, and constraints for non-AP STAs during WUR Duty Cycle. Understand the WUR modes, primary and secondary bandwidth usage, and implications for Wake-Up Signal transmission."
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May 2018 doc.: IEEE 802.11-18/0791r0 Preamble Punctured WUR FDMA Transmission Date: 2018-05-04 Authors: Name Affiliations Address Phone email 2840 Junction Ave, San Jose, CA 95134 yongho.seok@mediatek .com Yongho Seok MediaTek Inc. Jianhan Liu MediaTek Inc. James Yee MediaTek Inc. Thomas Pare MediaTek Inc. Rojan Chitrakar Panasonic Submission Slide 1 Yongho Seok, MediaTek Inc.
May 2018 doc.: IEEE 802.11-18/0791r0 Recap: FDMA MU Wakeup Operations Each 20MHz only contain one 4MHz sub-channel for Wake-Up Signal transmission. Similar to 11ax s 20MHz-only STA operation, one WUR receiver can stay in one of the sub-channel in a wide bandwidth. BPS K- Mark L- STF L- LTF L- SIG Wake-Up Signal for WUR STA #m Secondary 40MHz BPS K- Mark L- STF L- LTF L- SIG Wake-Up Signal for WUR STA #n BPS K- Mark BPS K- Mark L- STF L- LTF L- STF L- LTF L- SIG Wake-Up Signal for WUR STA #m L- SIG Wake-Up Signal for WUR STA #o Secondary 20MHz Secondary 20MHz BPS K- Mark BPS K- Mark L- STF L- LTF L- SIG Wake-Up Signal for WUR STA #n L- STF L- LTF L- SIG Wake-Up Signal for WUR STA #p Primary 20MHz Primary 20MHz FDMA MU Wakeup Operation using 40MHz FDMA MU Wakeup Operation using 80MHz Submission Slide 2 Yongho Seok, MediaTek Inc.
May 2018 doc.: IEEE 802.11-18/0791r0 Channel Access Procedure for WUR FDMA Transmission Once a WUR Mode Setup that enabled the FDMA MU Wakeup Operations is completed, In a WUR mode, during the WUR Duty Cycle, the non-AP STA shall listen on the WUR in the negotiated WUR channel specified by WUR Mode Setup frame. In the below figure, STA2, STA3, and STA4 are using the FDMA MU Wakeup Operations 802.11 Main Radio of STA1, 2, 3, and 4 Power Off WUR RX of STA4 is activated WUR RX of STA4 is activated WUR of STA1, 2, 3, and 4 Secondary 40MHz WUR RX of STA3 is activated WUR RX of STA3 is activated WUR RX of STA2 is activated WUR RX of STA2 is activated Secondary 20MHz WUR RX of STA1 is activated WUR RX of STA1 is activated Primary 20MHz Submission Slide 3 Yongho Seok, MediaTek Inc.
May 2018 doc.: IEEE 802.11-18/0791r0 Channel Access Procedure for WUR FDMA Transmission During the WUR RX activated time of the non-AP STA, the AP may transmit Wakeup frames to the non-AP STA in the negotiated WUR channel specified by WUR Mode Setup frame if the WUR channel is idle. 802.11 Main Radio Wakeup addressed to STA4 Wakeup addressed to STA3 Wakeup addressed to STA2 Wakeup addressed to STA1 PIFS PIFS Wakeup to STA4 WUR TX PIFS PIFS Wakeup to STA3 PIFS PIFS Wakeup to STA2 Wakeup to STA1 Back-off Back-off 802.11 Main Radio of STA1, 2, 3, and 4 Power Off WUR RX of STA4 is activated WUR RX of STA4 is activated WUR of STA1, 2, 3, and 4 Secondary 40MHz WUR RX of STA3 is activated WUR RX of STA3 is activated WUR RX of STA2 is activated WUR RX of STA2 is activated Secondary 20MHz WUR RX of STA1 is activated WUR RX of STA1 is activated Primary 20MHz Submission Slide 6 Yongho Seok, MediaTek Inc.
May 2018 doc.: IEEE 802.11-18/0791r0 Channel Access Procedure for WUR FDMA Transmission The FDMA MU Wakeup Operations has following constraints. If the PHY-CCA.indication(BUSY, {secondary}) is issued from the PHY, the AP can t transmit Wakeup frames to the non-AP STA whose the negotiated WUR channel is in the secondary 40/80 MHz channels even though the secondary 40/80 MHz channels are idle. If the PHY-CCA.indication(BUSY, {secondary40}) is issued from the PHY, the AP can t transmit Wakeup frames to the non-AP STA whose the negotiated WUR channel is in the secondary 80 MHz channels even though the secondary 80 MHz channels are idle. Submission Slide 5 Yongho Seok, MediaTek Inc.
May 2018 doc.: IEEE 802.11-18/0791r0 Channel Access Procedure for WUR FDMA Transmission The FDMA MU Wakeup Operations has following constraints. If the AP has no pending Wakeup frames to the non-AP STA whose the negotiated WUR channel is in the secondary 20 MHz channel, the AP can t transmit Wakeup frames to the non-AP STA whose the negotiated WUR channel is in the secondary 40/80 MHz channels. If the AP has no pending Wakeup frames to the non-AP STA whose the negotiated WUR channel is in the secondary 40 MHz channel, the AP can t transmit Wakeup frames to the non-AP STA whose the negotiated WUR channel is in the secondary 80 MHz channels. Submission Slide 6 Yongho Seok, MediaTek Inc.
May 2018 doc.: IEEE 802.11-18/0791r0 Preamble Punctured WUR FDMA Transmission When a WUR channel assigned from non-primary channels is busy, an AP does not transmit any signal to the corresponding WUR channel but it can transmit Wakeup frames on other idle channels. I.e., The Legacy preamble (L-STF, L-LTF, L-SIG, BPSK-Mark) and the Wake-up Signal are not transmitted on the corresponding the WUR channel. BPS K- Mark BPS K- Mark L- STF L- LTF L- SIG Wake-Up Signal for WUR STA #m L- STF L- LTF L- SIG Wake-Up Signal for WUR STA #m Secondary 40MHz Secondary 40MHz CCA Busy CCA Busy BPS K- Mark L- STF L- LTF L- SIG Wake-Up Signal for WUR STA #o Secondary 20MHz Secondary 20MHz BPS K- Mark BPS K- Mark L- STF L- LTF L- SIG Wake-Up Signal for WUR STA #p L- STF L- LTF L- SIG Wake-Up Signal for WUR STA #p Primary 20MHz Primary 20MHz Submission Slide 7 Yongho Seok, MediaTek Inc.
May 2018 doc.: IEEE 802.11-18/0791r0 Preamble Punctured WUR FDMA Transmission When a WUR channel assigned from non-primary channels is idle but there is no pending Wakeup frames to transmit in the WUR channel, an AP does not transmit any signal to the corresponding WUR channel but it can transmit Wakeup frames on other idle channels. BPS K- Mark BPS K- Mark L- STF L- LTF L- SIG Wake-Up Signal for WUR STA #m L- STF L- LTF L- SIG Wake-Up Signal for WUR STA #m Secondary 40MHz Secondary 40MHz CCA idle but no pending Wakeup frames CCA Idle but no pending Wakeup frames BPS K- Mark L- STF L- LTF L- SIG Wake-Up Signal for WUR STA #o Secondary 20MHz Secondary 20MHz BPS K- Mark BPS K- Mark L- STF L- LTF L- SIG Wake-Up Signal for WUR STA #p L- STF L- LTF L- SIG Wake-Up Signal for WUR STA #p Primary 20MHz Primary 20MHz Submission Slide 8 Yongho Seok, MediaTek Inc.
May 2018 doc.: IEEE 802.11-18/0791r0 Conclusion When the AP supports the preamble punctured HE MU PPDU transmission, the proposed preamble punctured WUR FDMA transmission can be easily supported though the basic primitives of the 802.11ax. The CCA of the preamble punctured WUR FDMA transmission is based on per20MHzbitmap. Submission Slide 9 Yongho Seok, MediaTek Inc.
May 2018 doc.: IEEE 802.11-18/0791r0 References [1] https://mentor.ieee.org/802.11/dcn/17/11-17-1625-06- 00ba-efficient-fdma-transmission-schemes-for-wur- wlan.pptx Submission Slide 10 Yongho Seok, MediaTek Inc.
May 2018 doc.: IEEE 802.11-18/0791r0 Straw Poll 1 Do you support the following preamble punctured WUR FDMA transmission? When an AP that supports the preamble punctured HE MU PPDU transmission on the 802.11 main radio meets one of the following conditions on a WUR channel assigned from non-primary channels, busy idle but there is no pending Wakeup frames to transmit in the WUR channel the AP does not transmit any signal to the corresponding WUR channel but it can transmit Wakeup frames on other idle channels. Submission Slide 11 Yongho Seok, MediaTek Inc.
