MAC Design Considerations for NBA-MMS-UWB Ranging Protocols
Explore MAC design considerations for narrow-band assisted (NBA) multi-millisecond (MMS) ultra-wideband (UWB) ranging protocols in this document submitted by Yong Liu and team from Apple Inc. The document discusses interference mitigation techniques, proposed solutions for high throughput data use cases, backward compatibility with enhanced ranging capable devices, coexistence improvements, and various enhancements for accuracy, reliability, and interoperability. It also covers improvements in link budget, reduced air-time, additional channels and operating frequencies, complexity reduction, power consumption optimization, and support for different network protocols.
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January 2022 doc.: < 15-22-0080-00-04ab > Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: NBA-MMS-UWB MAC Followup Date Submitted: Jan. 24, 2022 Source: Yong Liu, Santhosh Kumar Mani, Sam Schaevitz, Robert Golshan (Apple Inc.) Address: One Apple Park Way, Cupertino, CA 95104, USA E-Mail: Abstract: MAC design considerations for narrow-band assisted (NBA)-multi-millisecond (MMS)-UWB ranging protocols Purpose: Notice: discussion and is not binding on the authoring individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The authors(s) reserve(s) the right to add, amend or withdraw material contained herein. This document has been prepared to assist the IEEE P802.15. It is offered as a basis for NBA-MMS-UWB Slide 1 Yong Liu, et. al. (Apple Inc.)
January 2022 doc.: < 15-22-0080-00-04ab > PAR Objective Safeguards so that the high throughput data use cases will not cause significant disruption to low duty-cycle ranging use cases Interference mitigation techniques to support higher density and higher traffic use cases Other coexistence improvement Proposed Solution (how addressed) Backward compatibility with enhanced ranging capable devices (ERDEVs) Improved link budget and/or reduced air-time Use coordinated PHY signaling (NB and UWB) to improve link budget and/or to reduce air-time Additional channels and operating frequencies Improvements to accuracy / precision / reliability and interoperability for high-integrity ranging Reduced complexity and power consumption Off-loading of functionality to lower-complexity/power NB PHY helps reduce complexity of heavier UWB sub-system Exploit tightly coupled concurrent operation of NB to help UWB Hybrid operation with narrowband signaling to assist UWB Enhanced native discovery and connection setup mechanisms Sensing capabilities to support presence detection and environment mapping Low-power low-latency streaming Higher data-rate streaming allowing at least 50 Mbit/s of throughput Support for peer-to-peer, peer-to-multi-peer, and station-to- infrastructure protocols Infrastructure synchronization mechanisms NBA-MMS-UWB Slide 2 Yong Liu, et. al. (Apple Inc.)
January 2022 doc.: < 15-22-0080-00-04ab > Contents Recap (15-21-0605) NB Channel Hopping Protocol Design Considerations Conclusions NBA-MMS-UWB Slide 3 Yong Liu, et. al. (Apple Inc.)
January 2022 doc.: < 15-22-0080-00-04ab > NBA-MMS-UWB Ranging Session (Recap) NBA-MMS-UWB Slide 4 Yong Liu, et. al. (Apple Inc.)
January 2022 doc.: < 15-22-0080-00-04ab > NB MAC Considerations (Recap) Low power Contention free channel access (no LBT) Small protocol overhead Short NB packets Channel congestion / fading mitigation UNII-3 @ 5GHz band (refer to 15-21-0593-02-04ab-more-on-nba-mms) Channel hopping every ranging round Adaptive configuration Configurable ranging block/round, # of UWB fragments per round, ranging report methods, etc. NBA-MMS-UWB Slide 5 Yong Liu, et. al. (Apple Inc.)
January 2022 doc.: < 15-22-0080-00-04ab > NB Channel Hopping hop_channel = hop_function(shared_context, block/round_index) where: shared_context = some random bits generated per device pair or group block/round_index = monotonically increasing (in sync on both sides) hop_function = a pseudorandom function (outputs: 0 to N-1, where N=number of channels in the selected band) Channel blocklist Channels in the blocklist are skipped NBA-MMS-UWB Slide 6 Yong Liu, et. al. (Apple Inc.)
January 2022 doc.: < 15-22-0080-00-04ab > Protocol Design Considerations NBA-MMS-UWB Slide 7 Yong Liu, et. al. (Apple Inc.)
January 2022 doc.: < 15-22-0080-00-04ab > Conclusions NB assisted MMS UWB can provide substantial link budget gains. We propose to explore the usage of UNII-3@5GHz band and channel hopping to mitigate NB channel contention and fading. Some high-level protocol design considerations are presented to support an efficient and flexible NBA-MMS-UWB ranging sequence. NBA-MMS-UWB Slide 8 Yong Liu, et. al. (Apple Inc.)
January 2022 doc.: < 15-22-0080-00-04ab > References 15-21-0409-01-04ab-narrowband-assisted-multi-millisecond-uwb 15-21-0593-02-04ab-more-on-nba-mms 15-21-0605-00-04ab-nba-mms-uwb-mac-considerations NBA-MMS-UWB Slide 9 Yong Liu, et. al. (Apple Inc.)
