Proposal on Sensing Session Identification and Measurement Exchange
This document presents a proposal on identifying Sensing Sessions and Sensing Measurement exchanges in the context of WLAN sensing measurements. It discusses the setup, phases, and participants involved in the measurement exchange process.
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May 2021 Sensing session and measurement exchange identification Date: 2021-05-10 doc.: IEEE 802.11-21/0644r0 Authors: Name Solomon Trainin Qualcomm Affiliations Address Phone email strainin@qti.qualcomm.com eitana@qti.qualcomm.com Alecs Eitan Qualcomm akasher@qti.qualcomm.com Assaf Kasher Qualcomm smerlin@qti.qualcomm.com Simone Merlin Qualcomm alirezar@qti.qualcomm.com Ali Raissinia Qualcomm Submission Slide 1 Solomon Trainin, Qualcomm
May 2021 doc.: IEEE 802.11-21/0644r0 Abstract A proposal on how to identify the Sensing Session and the Sensing Measurement exchange Submission Slide 2 Solomon Trainin, Qualcomm
May 2021 doc.: IEEE 802.11-21/0644r0 Observation of the coverage 1. A WLAN sensing measurement collects channel state information from 802.11 compatible PPDUs 2. Only sensing receiver performs the CSI/sensing measurement 3. While in the coordinated measurement, the sensing measurement participants may be in the roles of sensing initiator, responder, transmitter, and receiver 4. One initiator may coordinate multiple responders 5. The measurement exchange is comprised of four phases setup phase, measurement phase, reporting phase, and termination phase 6. Negotiation is used to exchange and agree on operational parameters Submission Slide 3 Solomon Trainin, Qualcomm
May 2021 doc.: IEEE 802.11-21/0644r0 Sensing session 1. In the setup phase of a sensing session, a sensing session is established, and operational parameters associated with the sensing session are determined and may be exchanged between STAs (Motion 15, 20/1851r4). Keep the sensing session pairwise as in FTM/.11az Why? 1. The sensing session is identified by pair of the MAC addresses and/or by the pair of AID and AID/UID The .11az enables the unassociated STA to participate in the session with AP and it is identified by RSID. The ID of the unassociated STA is named UID in this presentation 2. One entity identified by an individual MAC address or associated AID may have a sensing session with more than one other entity identified by the individual MAC address or associated AID/UID 3. Add/terminate responders one by one 4. Enable pairwise (re)negotiation of the sensing measurement parameters 5. Use Association/Authentication and Pre-association security negotiation (PASN) to assert the AID/UID. AID/UID identifies the STA when a single frame addresses multiple STAs. 6. Provide pairwise keys for MAC and PHY secure protection 7. Reuse existing solution of .11az 2. 3. Submission Slide 4 Solomon Trainin, Qualcomm
May 2021 doc.: IEEE 802.11-21/0644r0 Sensing session identification The Sensing Session is pairwise and is identified by MAC addresses and/or associated AID/UID Submission Slide 5 Solomon Trainin, Qualcomm
May 2021 doc.: IEEE 802.11-21/0644r0 Sensing measurement exchange The measurement exchange may involve many phases. For example, all or part of the following phases may happen in the measurement exchange The 11bf amendment shall define an optional negotiation process in the sensing setup phase for a sensing initiator and sensing responder(s) to exchange and agree on operational parameters associated with a sensing session (Motion 17, 20/0370r1). The optional negotiation process is named as the Measurement setup in this presentation Submission Slide 6 Solomon Trainin, Qualcomm
May 2021 doc.: IEEE 802.11-21/0644r0 Sensing measurement exchange (cont. 1) In the measurement phase of a sensing session, sensing measurements are performed (Motion 15, 20/1851r4). In the reporting phase of a sensing session, sensing measurement results are reported (Motion 15, 20/1851r4). A Measurement instance may have one or part of the following: Polling addressed to multiple stations in one message Triggering or Announcement addressed to multiple stations in one message Individual reporting Submission Slide 7 Solomon Trainin, Qualcomm
May 2021 doc.: IEEE 802.11-21/0644r0 Sensing measurement exchange (cont. 2) Some phases, for example, the reporting may be delayed and may happen in the middle of a forthcoming measurement instance If the renegotiation is required, the measurement instance(s) and the negotiation in which the agreed parameters/attributes are used shall be terminated and the new negotiation and measurement instance shall be initiated The measurement instances may belong to different sets of the operational parameters/attributes negotiated at any time, independent of the previous negotiations The identifications of the sensing measurement exchange helps to keep the integrity of different phases in the measurement exchange Submission Slide 8 Solomon Trainin, Qualcomm
May 2021 doc.: IEEE 802.11-21/0644r0 Measurement Setup ID The Measurement Setup ID may be used to identify attributes used in the sensing measurement instance The measurement setup is provided separately to each responder at the negotiation phase The Measurement Setup ID is set to the same value among the responders that share the same measurement instances Submission Slide 9 Solomon Trainin, Qualcomm
May 2021 doc.: IEEE 802.11-21/0644r0 Measurement Instance ID The sensing measurement instance may contain several frames (poll, trigger, NDP announcement, NDP, reports) to perform complete measurement among one or more responders The Measurement Instance ID uniquely identifies the sensing measurement instance per the Measurement Setup ID The Measurement Instance ID is used to identify the frames that belong to the same sensing measurement instance The Dialog Token field of the frames used in the measurement instance may contain both the Measurement Setup ID and the Measurement Instance ID Submission Slide 10 Solomon Trainin, Qualcomm
May 2021 doc.: IEEE 802.11-21/0644r0 Example of the sensing measurement Legend Session establishment Non-AP STA 1 Measurement setup. Negotiation of measurement and reporting attributes/parameters Polling AP STA Initiator NDP Triggering/ NDP Announcement Non-AP STA 3 Unassociated TX/RX of measurement PPDUs Non-AP STA 2 LTF key renewal Reporting Sensing measurement exchange that may be identified by the Measurement Setup ID Sensing measurement instance that may be identified by the Measurement Instance ID Solomon Trainin, Qualcomm Submission Slide 11
May 2021 doc.: IEEE 802.11-21/0644r0 Example of the sensing measurement timeline Solomon Trainin, Qualcomm Submission Slide 12
May 2021 doc.: IEEE 802.11-21/0644r0 SP1 Do you agree with the following: The Sensing Session is pairwise and is identified by MAC addresses and/or associated AID/UID? Submission Slide 13 Solomon Trainin, Qualcomm
May 2021 doc.: IEEE 802.11-21/0644r0 SP2 Do you agree with the following: The Measurement Setup ID may be used to identify attributes of the sensing measurement instances The Measurement Instance ID may be used to identify the sensing measurement instance that utilizes attributes of the same Measurement Setup ID The Dialog Token field may contain both IDs Submission Slide 14 Solomon Trainin, Qualcomm
