IEEE 802.11 NGV Ranging Discussions Summary
Discussed in the documents are various aspects of ranging and locationing within the IEEE 802.11 NGV framework. Use cases related to ranging between cars and locationing of vehicles are explored. The presentations highlight ranging methodologies such as FTM-based ranging, NDP SU ranging, and NDP MU ranging, proposing possible enhancements to decrease TXOPs and enable snoop-based ranging. Different MAC protocols are considered for ranging applications.
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July 2018 doc.: IEEE 802.11-18/1250r0 NGV Ranging Discussions Date: 2018-07-08 Authors: Name Affiliations Address Phone email Liwen Chu Christian Berger Niranjan Grandhe Hongyuan Zhang Marvell 5488 Marvell Ln, Santa Clara, CA 95054 Submission Slide 1 Liwen Chu, Marvell
July 2018 doc.: IEEE 802.11-18/1250r0 Use Cases Related Ranging Ranging measurement between cars (V2V): Find the range between cars when other technology is not applicable Locationing of car (V2I): Find the car s location when other technology is not applicable. Example: the Urban canyon scenario, where GPS is not available or not accurate. Submission Slide 2 Liwen Chu, Marvell
03/06/2018 doc.: IEEE 802.11-18/1250r0 Recap: Ranging/Locationing in 802.11 11mc: FTM based ranging Multiple TXOPs for one ranging (one Action (FTM Request, FTM) and its acknowledgment in one TXOP) Applicable to associated/unassociated STAs 11az: NDP SU ranging At least Three TXOPs for one ranging (11az FTM Request + Ack, 11az FTM + Ack, UL NDPA + UL NDP + DL NDP + DL measurement feedback) Applicable to associated/unassociated STAs 11az: NDP MU ranging one negotiation + multiple MU NDP measurement where each measurement is in one TXOP Applicable to associated/unassociated STAs with one AP 11az: snoop-based ranging variant of NDP MU ranging Listening STAs need to decode Trigger frame Submission Slide 3 Hongyuan Zhang, Marvell, et al
July 2018 doc.: IEEE 802.11-18/1250r0 Possible Enhancement for NGV Ranging NDP based ranging Decreasing the number of TXOPs for each non-snoop based ranging Enabling decoding of Trigger for snoop-based NDP ranging Either OCB based or BSS based MAC may be used for ranging. Submission Slide 4 Liwen Chu, Marvell
