Capability of Supporting Windowing for Secure LTF in IEEE 802.11-21/0071r0
The document discusses the addition of windowing options, like Flat Top window, to enhance the security of Long Training Fields (LTF) in IEEE 802.11-21/0071r0 standard. Evaluation of different frequency domain windows, recommendations for window usage, and the importance of indicating support for Flat Top window at both transmitter and receiver are highlighted through slides.
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January 2021 doc.: IEEE 802.11-21/0071r0 On Capability of Supporting Windowing for Secure LTF Date: 2021-01-08 Authors: Name Affiliations Address Phone Email Jianhan Liu jianhan.liu@mediatek.com Mediatek 2840 Junction Ave. San Jose, CA, 95134 Thomas Pare Christian Berger NXP Hongyuan Zhang Submission Slide 1 Jianhan Liu, Mediatek Inc.
January 2021 doc.: IEEE 802.11-21/0071r0 Status on Windowing Different Tx frequency-domain (FD) windows had been evaluated and proposed to increase the security of LTF Rectangular window [1] Raised-cosine (RC) window [2] Flat Top window[3] The following straw poll has been conducted in [3]: Do you agree that ISTA/RSTA support following frequency domain windowing? Default is Rectangular window (equivalent to no windowing) Flat Top window is optional, but recommended for improved security Transmitting STA will indicate to receiving STA whether flat top window is used Signaling method TBD No test for ISTA/RSTA Tx window defined in 11az spec Submission Slide 2 Jianhan Liu, Mediatek Inc.
January 2021 doc.: IEEE 802.11-21/0071r0 Adding capability of Supporting Windowing Given the Flat Top window is optional, capability of supporting Flat Top window or not shall be indicated at the TX and RX. Since Flat Top window is optional, TX and RX should have the freedom to implement it or not implement it. A receiver that does not support Flat Top window can avoid potential performance loss caused by TX sending it the secure LTF with Flat Top window. A transmitter that does not support Flat Top window can avoid the receiver to sending it request of adding with Flat Top window. Submission Slide 3 Jianhan Liu, Mediatek Inc.
January 2021 doc.: IEEE 802.11-21/0071r0 Straw Poll #1 Do you agree to add the transmit and receive capability of supporting Flat Top window on Secure LTF? Submission Slide 4 Jianhan Liu, Mediatek Inc.
January 2021 doc.: IEEE 802.11-21/0071r0 References [1] 802.11-20/0836r0, 11az Secure LTF Design [2] 802.11-20/1855r0, Further Updated on 11az Secure LTF Design [3] 802.11-20/1595r2, Tx FD Window Design for Secure LTF Submission Slide 5 Jianhan Liu, Mediatek Inc.
