Analysis of Beam Tracking in IEEE 802.11-19/0007r0 Document

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The document "January 2019.doc: IEEE 802.11-19/0007r0" discusses the necessity of beam tracking in the 11md draft. It explores whether beam tracking should be mandatory or optional and provides insights into DMG beam tracking procedures for both TX and RX in wireless communication. The document emphasizes the current mandatory status of beam tracking and highlights key aspects related to antenna pattern adaptation.

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January 2019 doc.: IEEE 802.11-19/0007r0 Beam Tracking Mandatory? Date: 2019-01-03 Authors: Name Assaf Kasher Affiliations Qualcomm Address Phone email akasher@qti.qualcomm.com Eitan Alecsander Qualcomm eitana@qti.qualcomm.com Solomon Trainin Qualcomm strainin@qti.qualcomm.com Submission Slide 1 Assaf Kassher, Qualcomm

January 2019 doc.: IEEE 802.11-19/0007r0 Abstract In this document we examine whether beam tracking should remain mandatory as it is now in the 11md draft, or should we make it or parts of it optional. Submission Slide 2 Assaf Kassher, Qualcomm

January 2019 doc.: IEEE 802.11-19/0007r0 What is DMG beam tracking - TX RX beam tracking is a procedure (in 11md draft) that allows for requesting an RX training field in the next PPDU using PHY header signalling. A STA requests RX beam training by setting Beam Tracking Requested to 1, Packet Type to 0 and TRN- LEN>0 TRN field (for RX) is appended to the next PPDU from the peer STA. The intent is to allow the RX side of the link to adapt antenna pattern around current RX AWV. Submission Slide 3 Assaf Kassher, Qualcomm

January 2019 doc.: IEEE 802.11-19/0007r0 What is DMG beam tracking - TX DMG TX Beam tracking is a process by which a STA appends a TRN field to a PPDU (without including a BRP frame) and signals that it requests TX training by using the PHY header (Beam Tracking Requested=1, Packet Type=1, TRN- LEN >0. The responder is expected to send feedback. It allows the STA to perform TX beam training (when the peer STA uses the same RX pattern used to RX data. Submission Slide 4 Assaf Kassher, Qualcomm

January 2019 doc.: IEEE 802.11-19/0007r0 Recap In Short, beam tracking allows for some beam forming training, around the current pattern for both TX and RX without interrupting data transmission. Other applications may be possible. Submission Slide 5 Assaf Kassher, Qualcomm

January 2019 doc.: IEEE 802.11-19/0007r0 Mandatory Today? It looks like Beam Tracking is mandatory in both RX and TX according to table 10-29. Submission Slide 6 Assaf Kassher, Qualcomm

January 2019 doc.: IEEE 802.11-19/0007r0 Some texts try s to make unsupported This text in 9.4.2.127.4 claims that if this field is 0, Beam tracking is unsupported. There is no normative behavior associated with this field as to making the BF optional there is plenty of other text that makes Beam Tracking Mandatory. Submission Slide 7 Assaf Kassher, Qualcomm

January 2019 doc.: IEEE 802.11-19/0007r0 This is 11md? Yes, but we are the experts on DMG, the decision should come from here. We can provide a liaison to 11md they will vote on text changes Are we fixing history? In a way, but there ambiguity in the text that need to be fixed. Submission Slide 8 Assaf Kassher, Qualcomm

January 2019 doc.: IEEE 802.11-19/0007r0 Options Make All beam tracking optional - add a capability field to DMG beamforming. Make RX tracking mandatory (to transmit the TRN field) but TX tracking optional RX tracking is relatively simple TX tracking require creating the FB and pushing it inside normal data traffic. Keep Beam tracking mandatory Delete the option of setting Beam Tracking Time Limit to 0 Submission Slide 9 Assaf Kassher, Qualcomm

January 2019 doc.: IEEE 802.11-19/0007r0 SP Do you support: Option1: Beam Tracking Fully optional Option2: Beam Tracking Mandatory for RX BT and optional for BT Option3: Beam Tracking Fully Mandatory Submission Slide 10 Assaf Kassher, Qualcomm