IMMW Channelization Proposal for IEEE 802.11-25/0363r0 in March 2025
Explore the proposed channelization and bandwidth design for IMMW PHY leveraging sub-7GHz PHY design in IEEE 802.11 standard. Discover the non-overlapping channel proposal to optimize frequency bands and avoid complex signaling. Dive into examples and mathematical representations for channel center frequencies. Gain insights into the relationship between IMMW and sub-7GHz bandwidths for efficient tone planning and subcarrier spacing.
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March 2025 doc.: IEEE 802.11-25/0363r0 Channelization in IMMW Date: 2025-3-9 Authors: Name Yapu Li Affiliations OPPO Address 15F, Building A2, Central Park Plaza, Chao Yang, Beijing, China Phone email liyapu1@oppo.com Dong Wei Weijie Xu Chaoming Luo Ning Gao Submission Slide 1 Yapu Li, OPPO
March 2025 doc.: IEEE 802.11-25/0363r0 Introduction The IMMW PHY is proposed to leverage sub-7GHz PHY design[1]. In [2], high level design for IMMW channelization is proposed Align or not align with 11ay. Overlapping or non-overlapping channels. In this presentation, we will share more details on IMMW channelization and BW design. Submission Slide 2 Yapu Li, OPPO
March 2025 doc.: IEEE 802.11-25/0363r0 Recap: 11ay There are totally 8 channels with BW=2.16GHz. Larger BWs consists of 2, 3 or 4 consecutive 2.16GHz channels. We can use 8*2.16GHz=17.28GHz BW to do channelization for IMMW. Submission Slide 3 Yapu Li, OPPO
March 2025 doc.: IEEE 802.11-25/0363r0 IMMW Channelization proposal Channels are non-overlapped Based on the available mmW frequency band of 11ay, we can define enough channels Avoid complex signaling design No channel aggregation, such as 320+320 MHz Similar design has been abandoned since EHT Submission Slide 4 Yapu Li, OPPO
March 2025 doc.: IEEE 802.11-25/0363r0 IMMW Channelization Example An example with minimum BWmin=320MHz. The channel center frequency is defined as an integer multiple of BWmin/2=160MHz. 320MHz channel number is 1, 3, 5, , 105, 107. 640MHz channel number is 2, 6, 10, , 102, 106. 1280MHz (if any) channel number is 4, 12, 20, 28, , 84, 92, 100. 100 4 1280MHz 2 6 10 102 106 640MHz 103 101 105 107 7 11 1 3 5 9 320MHz 7 103 1 2 3 4 5 6 8 9 10 11 12 101 102 104 105 106 107 108 100 Channel number Channel Starting 160MHz 160MHz 160MHz 160MHz 160MHz 160MHz 160MHz 160MHz 160MHz 160MHz 160MHz 160MHz 160MHz 160MHz 160MHz 160MHz 160MHz 160MHz 160MHz 160MHz Frequency Channel center frequency = Channel starting frequency + 0.16*nch (GHz) Where nch is channel number, and equals to 1, 2, 3, , 108. Submission Slide 5 Yapu Li, OPPO
March 2025 doc.: IEEE 802.11-25/0363r0 Bandwidth Proposal IMMW BW can be multiplied on the sub-7GHz BW. There can be a mapping relationship: ??????= ????? 7??? scaling factor, where ????? 7???=20,40,80,160MHz. For a given BW, it s better to keep same number of tones between IMMW and sub-7GHz, so that we can reuse tone plan. Thus, the subcarrier spacing also has the following relationship: ?????= ???? 7??? scaling factor, where ???? 7???=78.125 or 312.5kHz. The scaling factor need further studied. Submission Slide 6 Yapu Li, OPPO
March 2025 doc.: IEEE 802.11-25/0363r0 Summary We propose IMMW channels are non-overlapped and non- aggregation. Low complexity for signaling and implementation. The channel center frequency is defined as an integer multiple of BWmin/2. This definition provides a unique numbering system for all channels. It s flexible to define channelization sets for next generation IMMW. Based on sub-7GHz, we can use same scaling factor to design IMMW BW and IMMW subcarrier spacing. Submission Slide 7 Yapu Li, OPPO
March 2025 doc.: IEEE 802.11-25/0363r0 SP 1 Do you agree to add the following into 11bq SFD? IMMW channels are non-overlapped and non-aggregation. Y N A Submission Slide 8 Yapu Li, OPPO
March 2025 doc.: IEEE 802.11-25/0363r0 SP 2 Do you agree to add the following into 11bq SFD? The IMMW channel center frequency is defined as an integer multiple of BWmin/2. Note: The BWmin is TBD Y N A Submission Slide 9 Yapu Li, OPPO
March 2025 doc.: IEEE 802.11-25/0363r0 References [1] P802.11bq_PAR [2] 11-23-1878-01-immw-high-level-design-considerations-of-immw Submission Slide 10 Yapu Li, OPPO
