Explore the key characteristics of millimeter wave communication, focusing on line-of-sight transmission and beam training for reducing service delay. Learn about subchannel beam refinement, time-division multiplexing, and beam scanning procedures in dynamic environments. Discover innovative solutions for optimizing data transmission in mmWave technology.
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Presentation Transcript
May. 2025 Doc.: IEEE 802.11-25/xxxx Subchannel Beam Training for IMMW Communication Submission Qisheng Huang, et al. (ZTE)
May. 2025 Doc.: IEEE 802.11-25/xxxx Recap of Previous Beam Sweeping Procedure Note There may be extra beam refinement procedure defined in 11ay. Submission Slide 2 Qisheng Huang, et al. (ZTE)
May. 2025 Doc.: IEEE 802.11-25/xxxx Millimeter Wave Communication Overview Key Characteristics of mmWave Line-of-Sight (LoS) Transmission: Millimeter wave (mmWave) primarily relies on LoS transmission. Dynamic Environments: Optimal propagation path can change with environmental variations (e.g., door/window opening/closing). Periodic Scanning: Necessary to optimize the link in mmWave communication. Beam Scanning and Data Transmission: Time-Division Multiplexing: Beam scanning and data transmission are performed in a time-division manner. Scanning Process: Involves multiple sectors and occupies data transmission time. Impact of Frequent Scanning: Reduces data transmission time, increasing service delay and reducing system throughput. Submission Slide 3 Qisheng Huang, et al. (ZTE)
May. 2025 Doc.: IEEE 802.11-25/xxxx Motivation Main Purpose: Reducing Service Delay in mmWave Beam Scanning Solution: Use a sub-channel for simultaneous beam refinement and data communication. Implementation: Select a sub-channel within the mmWave bandwidth for beam calibration. Enables concurrent data transmission and beam calibration (sector measurement and alignment). Minimal impact: Only a small portion of bandwidth is used for calibration. Key Consideration: Frequency beam squint effect: Choosing sub-channels with smaller center frequency differences reduces beam calibration errors. Submission Slide 4 Qisheng Huang, et al. (ZTE)
May. 2025 Doc.: IEEE 802.11-25/xxxx Motivation Main Purpose: Convert frequency domain overhead to time domain Submission Slide 5 Qisheng Huang, et al. (ZTE)
May. 2025 Doc.: IEEE 802.11-25/xxxx Mode 1: Independent Link for Scanning Key features: Mode Description: Uses an independent link to perform sub- bandwidth scanning. Simultaneous Operations: Beam scanning and data transmission can occur concurrently. AP can send/receive beam calibration frames via the sub-channel while transmitting/receiving PPDU data packets via the main channel to/from STA. Submission Slide 6 Qisheng Huang, et al. (ZTE)
May. 2025 Doc.: IEEE 802.11-25/xxxx Mode 2: Shared RF Front-End Key features: Synchronization Requirement: Main channel and beam calibration sub- channel must be synchronized If the main channel is transmitting/receiving, the sub-channel must also be transmitting/receiving. Alignment Methods: Header Alignment: Beam calibration frames aligned with the header of the PPDU on the main channel. Tail Alignment: Beam calibration frames aligned with the tail of the PPDU on the main channel. Submission Slide 7 Qisheng Huang, et al. (ZTE)
May. 2025 Doc.: IEEE 802.11-25/xxxx Summary Frequent beam scanning in millimeter wave (mmWave) systems increases service delays, impacting performance in latency-sensitive applications. Therefore this proposal utilize a dedicated sub-channel within the mmWave bandwidth for beam calibration Provides detailed analysis and design of scanning and feedback frame interactions specific to each work mode. Designs of sub-channel scanning modes are tailored to current device capabilities, optimizing for efficiency and compatibility. Submission Slide 8 Qisheng Huang, et al. (ZTE)
May. 2025 Doc.: IEEE 802.11-25/xxxx Staw Poll Do you agree to set up subchannel for beam training in IMMW The specific position of the subchannel is TBD. Submission Slide 9 Qisheng Huang, et al. (ZTE)
May. 2025 Doc.: IEEE 802.11-25/xxxx THANK YOU Submission Slide 10 Qisheng Huang, et al. (ZTE)
