Proposed Changes for 60GHz Direction Measurement in January 2018 IEEE Document

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"This presentation outlines the necessary modifications to the SFD for enabling angle of arrival and angle of departure measurements at 60GHz frequency. Details include capability exchange, FTM measurements, parameters exchange, feedback requirements, and proposed changes to the packet format. The slides suggest adding capabilities for AOA and AOD measurements as transmitter and receiver, AOD feedback types, and enhancements to the training fields and channel measurement feedback. The goal is to improve accuracy and efficiency in location tracking at 60GHz. Presented by Assaf Kasher from Qualcomm in January 2018."

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January 2018 doc.: IEEE 802.11-18/0140r0 60GHz Direction Measurement SFD text Date: 2018-01-10 Authors: Name Assaf Kasher Affiliations Address Qualcomm Phone email akasher@qti.qualcomm.com Eitan Alecsander Qualcomm eitana@qti.qualcomm.com Solomon Trainin Qualcomm strainin@qti.qualcomm.com Submission Slide 1 Assaf Kasher, Qualcomm

January 2018 doc.: IEEE 802.11-18/0140r0 Abstract [place presentation abstract text here] Submission Slide 2 Assaf Kasher, Qualcomm

Slide 3 January 2018 doc.: IEEE 802.11-18/0140r0 Introduction This presentation proposes the changes required to the SFD to enable angle of arrival and angle of departure measurement for location in 60GHz. Submission Assaf Kasher, Qualcomm

Slide 4 January 2018 doc.: IEEE 802.11-18/0140r0 What are the changes need in the draft To enable 60GHz AOA and AOD measurement we need the following changes: Capability exchange AOA, AOD capabilities as transmitter and receiver. Measuring FTM at the end of the packet (both transmitter and receiver) AOD feedback types Parameters exchange Length of training fields For FTM For AOA For AOD AOA or AOD in each direction Density of direction measurement in a burst Packet format modification Addition Of training field to FTM frames (Standard 11ad/11ay feature) Feedback AOA and Accuracy results Feedback need for AOD calculations (similar to feedback used today for BRP packets) Submission Assaf Kasher, Qualcomm

Slide 5 January 2018 doc.: IEEE 802.11-18/0140r0 Capability Exchange We need capability exchange for the following: AOA measurement as transmitter and receiver AOD measurement as transmitter and receiver AOD feedback capabilities Best TRN subfield Channel measurement feedback We propose to add these set of capabilities as an extended capability to the EDMG extended capabilities element Submission Assaf Kasher, Qualcomm

Slide 6 January 2018 doc.: IEEE 802.11-18/0140r0 Capabilities Element B1 B2 1O 1O B0 B3 B4 B5 B6 B7 AOD Channel Measurement Feedback AOD Feedback Best TRN subfield (sub)Element ID Length AOA TX capability AOA RX capability AOD TX capability AOD RX capability reserved This can be a separate capability element or a sub-element of an existing capabilities set. AOA TX capability indicates support for AOA TX ability to add RX TRN field AOA RX capability indicates support for AOA RX ability to measure RX TRN field and estimate AOA AOD TX capability indicates support for AOA TX ability to transmit TX TRN field for AOA estimation AOD RX capability indicates support for AOA RX ability to measure TX TRN field for AOD estimation AOD Channel Measurement Feedback ability to measure and send channel feedback information as in DMG channel measurement feedback element. Submission Assaf Kasher, Qualcomm

Slide 7 January 2018 doc.: IEEE 802.11-18/0140r0 Responding STA Initiating STA Protocol Initial FTM Request(Parameters) ACK FTM_1(0,0,Parameters) ACK Parameters are exchanged in the initial FTM request Remain constant until changed. AOD may be sent not in the immediately following FTM measurement FTM Request(Trigger) ACK t1 (m=1) FTM_2(0,0,TRN field) t2 (m=1) t3 (m=1) ACK+TRN Field t4 (m=1) t1 (m=2) FTM_3(t1_2,t4_2,AOA) t2 (m=2) t3 (m=2) ACK t4 (m=2) t1 (m=3) FTM_4(t1_3,t4_3) t2 (m=3) t3 (m=3) ACK t4 (m=3) FTM_5(t1_4,t4_4,AOA) ACK Submission Assaf Kasher, Qualcomm

Slide 8 January 2018 doc.: IEEE 802.11-18/0140r0 Parameters Exchange Initiator Request may ask for AOA on FTM AOD on FTM AOA on ACK AOD on ACK Parameters: Number of TRN subfields AOA measurement density Assumption: The request of the initiator must be obeyed by the responder if it has published these capability The responder requests for TRN subfields and for AOA measurement density (assuming it is the AP) Submission Assaf Kasher, Qualcomm

Slide 9 January 2018 doc.: IEEE 802.11-18/0140r0 Direction Measurement Parameters Element 1O 1O B0 1O B1 B2 B3 Element Length Element ID Extension Element Id UL AOA request DL AOA request UL AOD request DL AOD request B4 B11 B12 B15 B16 B17 B18 B19 B20 B23 Direction Measurement Density L_RX TRN-M TRN-P Reserved To be added to iFTM request and iFTM measurement frames Fields: UL AOA request, DL AOA request, UL AOD request, DL AOD request: request for Angel of Arrival, Angle of Departure in uplink (ACK) and downlink (FTM). L-RX, TRN-M, TRN-P are the number of TRN-Units (DMG) and TRN-Units construction (EDMG). These parameters are requests from the other device for AOA training. Direction measurement Density: in next slide Submission Assaf Kasher, Qualcomm

Slide 10 January 2018 doc.: IEEE 802.11-18/0140r0 Direction Measurement Parameters element The AOA Density is determined by the AP (responder), This parameter in the responder (AP) overrides the same parameter in initiator It can take the values: Only first exchange in burst Every 1, 2, 4, 8 measurement in burst. This parameter is needed because of the additional length needed for angle measurement Under default parameter, every 6 AWV measurements require 3.5usec, while transferring 100bytes require 4usec. Calculation of AOA may be expensive (compared to FTM). Submission Assaf Kasher, Qualcomm

Slide 11 January 2018 doc.: IEEE 802.11-18/0140r0 AOA results AOA (in earth coordinates), Degrees Includes azimuth and elevation Other formats possible AOA accuracy (estimate) AOD response Best sector Channel measurement feedback An element added to the FTM response Channel Measurement feedback as a different element. Submission Assaf Kasher, Qualcomm

Slide 12 January 2018 doc.: IEEE 802.11-18/0140r0 AOA results element 1O 1O 1O 1O B0 B10 B11 B21 B22 B28 B29 B35 B36 B39 Element ID Extension Element Id Element Length AOA Azimuth Accuracy AOA Elevation Accuracy AOA Azimuth AOA Elevation Reserved The AOA results are in deg/4 accuracy (0-360 Accuracy results are in deg/4 accuracy ) Submission Assaf Kasher, Qualcomm

Slide 13 January 2018 doc.: IEEE 802.11-18/0140r0 Strawpoll Do you agree to add to the SFD: The capabilities element as defined in slide 6 The measurement parameters as defined in slide 9 The AOA results element as defined in slide 12 Submission Assaf Kasher, Qualcomm