IEEE 802.11-24/1135r1 ITU Liaison Ad Hoc Group Agenda Summary

July 2024 doc.: IEEE 802.11-24/1135r1 ITU Liaison Ad Hoc Group Agenda Date: 2024-18-07 Authors: Name Affiliations Address Phone email 3600 Juliette Ln Santa Clara, CA 95054 7305 Napier Trail Hassan Yaghoobi Intel Corp. hassan.yaghoobi at intel.com Rich Kennedy Bluetooth SIG rkennedy1000@gmail.com Agenda Slide 1 Hassan Yaghoobi (Intel Corp.)

July 2024 doc.: IEEE 802.11-24/1135r1 Abstract Agenda for: 802.11 ITU AHG (ITU Liaison Ad Hoc Group) July 18, 2024 Chair: Hassan Yaghoobi (Intel Corp.) Secretary: Richard Kennedy (Bluetooth SIG) Agenda Slide 2 Hassan Yaghoobi (Intel Corp.)

July 2024 doc.: IEEE 802.11-24/1135r1 Reminders and Rules Reminders to attendees: Please record your attendance Please mute any noise making devices No recordings Rules No formal rules agree to our own process No motions (straw polls are okay) Participation in the ITU AHG at this meeting counts towards 802.11 voting rights; capture your attendance on IMAT https://imat.ieee.org/attendance Agenda Slide 3 Hassan Yaghoobi (Intel Corp.)

July 2024 doc.: IEEE 802.11-24/1135r1 Guidelines for IEEE-SA Meetings All IEEE-SA standards meetings shall be conducted in compliance with all applicable laws, including antitrust and competition laws. Don t discuss the interpretation, validity, or essentiality of patents/patent claims. Don t discuss specific license rates, terms, or conditions. Relative costs, including licensing costs of essential patent claims, of different technical approaches may be discussed in standards development meetings. Technical considerations remain primary focus Don t discuss or engage in the fixing of product prices, allocation of customers, or division of sales markets. Don t discuss the status or substance of ongoing or threatened litigation. Don t be silent if inappropriate topics are discussed do formally object. --------------------------------------------------------------- If you have questions, contact the IEEE-SA Standards Board Patent Committee Administrator at patcom@ieee.org or visit http://standards.ieee.org/about/sasb/patcom/index.html See IEEE-SA Standards Board Operations Manual, clause 5.3.10 and Promoting Competition and Innovation: What You Need to Know about the IEEE Standards Association's Antitrust and Competition Policy for more details. This slide set is available at https://development.standards.ieee.org/myproject/Public/mytools/mob/preparslides.ppt Agenda Slide 4 Hassan Yaghoobi (Intel Corp.)

July 2024 doc.: IEEE 802.11-24/1135r1 Resources URLs Link to IEEE Disclosure of Affiliation http://standards.ieee.org/faqs/affiliationFAQ.html Links to IEEE Antitrust Guidelines http://standards.ieee.org/resources/antitrust-guidelines.pdf Link to IEEE Code of Ethics http://www.ieee.org/web/membership/ethics/code_ethics.html Link to IEEE Patent Policy http://standards.ieee.org/board/pat/pat-slideset.ppt Agenda Slide 5 Hassan Yaghoobi (Intel Corp.)

July 2024 doc.: IEEE 802.11-24/1135r1 Participation in IEEE 802 Meetings Participation in any IEEE 802 meeting (Sponsor, Sponsor subgroup, Working Group, Working Group subgroup, etc.) is on an individual basis Participants in the IEEE standards development individual process shall act based on their qualifications and experience. (https://standards.ieee.org/develop/policies/bylaws/sb_bylaws.pdf section 5.2.1) IEEE 802 Working Group membership is by individual; Working Group members shall participate in the consensus process in a manner consistent with their professional expert opinion as individuals, and not as organizational representatives . (subclause 4.2.1 Establishment , of the IEEE 802 LMSC Working Group Policies and Procedures) Participants have an obligation to act and vote as an individual and not under the direction of any other individual or group. A Participant s obligation to act and vote as an individual applies in all cases, regardless of any external commitments, agreements, contracts, or orders. Participants shall not direct the actions or votes of any other member of an IEEE 802 Working Group or retaliate against any other member for their actions or votes within IEEE 802 Working Group meetings, see https://standards.ieee.org/develop/policies/bylaws/sb_bylaws.pdf section 5.2.1.3 and the IEEE 802 LMSC Working Group Policies and Procedures, subclause 3.4.1 Chair , list item x. By participating in IEEE 802 meetings, you accept these requirements. If you do not agree to these policies then you shall not participate. (Latest revision of IEEE 802 LMSC Working Group Policies and Procedures: http://www.ieee802.org/devdocs.shtml) Agenda Slide 6 Hassan Yaghoobi (Intel Corp.)

July 2024 doc.: IEEE 802.11-24/1135r1 Registration for the July IEEE 802 plenary session This meeting is part of the July IEEE 802 plenary session You must pay the registration fee whether attending in-person or remotely If you have not already done so, you can register here: https://cvent.me/dkO9BB If you do not intend to register for this session you must leave this meeting and, if you have logged attendance on IMAT, email the 802.11 chair or vice chairs to have your attendance cancelled Agenda Slide 7 Marc Emmelmann (SELF)

July 2024 doc.: IEEE 802.11-24/1135r1 Agenda 1. 2. 3. 4. 5. Administrative: Reminders, Rules, Guidelines, Resources Roll Call Approval of Agenda Approval of Minutes of Previous Meeting Contributions a. N/A 6. Updates from ITU-R WP5A a. Monday 2024-05-13 - Thursday 2024-05-23 7. Discussion Items a. 5A/93 ITU-R WP5B LS to WP5A: Liaison statement to ITU-R Working Party 5A (copy to World Meteorological Organization for information) - Solid-state transmitter radars and wireless access systems and radio local area networks in the 5 GHz frequency band 8. Ad Hoc Endorsement a. N/A 9. Plan for going forward 10. Any Other Business? 11. Next Meetings Agenda Slide 8 Hassan Yaghoobi (Intel Corp.)

July 2024 doc.: IEEE 802.11-24/1135r1 Approval of Minutes of Previous Meeting Minutes for March 14, 2024 Meeting https://mentor.ieee.org/802.11/dcn/24/11-24-0282-00-0itu-itu-ahg-minutes-for-march-2024- plenary.docx Agenda Slide 9 Hassan Yaghoobi (Intel Corp.)

July 2024 doc.: IEEE 802.11-24/1135r1 Contributions New Contributions a. N/A Contribution for Further Discussion a. N/A References N/A Agenda Slide 10 Hassan Yaghoobi (Intel Corp)

July 2024 doc.: IEEE 802.11-24/1135r1 Updates from ITU-R WP5A: Input Contributions WP-5A-1: Systems and standards (Chair: Kraemer, Michael) ITU-R M.1450 Input Documents: 5A/837 (Annex 6) (WP 5A): 5A/40 (IEEE), 5A/42 (UK), 5A/43 (Canada), 5A/46 (Japan), 5A/47 (Multi- Country), 5A/51 (Germany), 5A/54 (China) Broadband Wireless Access Systems and standards ITU-R M.1801 Input Documents: 5A/837 (Annex 7) (WP 5A): 5A/44 (Canada) Support WG 4 with characteristics for sharing & coexistence studies RLAN characteristics [ 54 ] Proposal on the modification of the working document towards a preliminary draft revision of Recommendation ITU-R M.1450-5 Finalisation of the revision of Recommendation ITU-R M.1450 China [ 51 ] [ 47 ] [ 46 ] Germany Revision of Recommendation ITU-R M.1450-5 Japan , Korea (Rep. of) , Saudi Arabia , United States Japan Proposed modifications to the working document towards the preliminary draft revision of Recommendation ITU-R M.1450-5 - Characteristics of broadband radio local area networks Working document towards a preliminary draft revision of Recommendation ITU-R M.1450-5 - Characteristics of broadband radio local area networks Revision of Recommendation ITU-R M.1450-5 [ 43 ] Canada [ 42 ] [ 40 ] [ 44 ] United Kingdom Institute of Electrical and Electronics Engineers, Inc. (IEEE) (United States) Canada Proposed modification to Annex 6 to Document 5A/837 Revision of Recommendation ITU-R M.1801-2 Agenda Slide 11 Hassan Yaghoobi (Intel Corp.)

July 2024 doc.: IEEE 802.11-24/1135r1 Chairman Report & Output Docs of WP5A May 2024 REPORT ON THE THIRTY-FIRST MEETING OF WORKING PARTY 5A (Geneva, Switzerland, 14-24 May 2024) [91] Documents were proposed for elevation at the final plenary from working document towards status to preliminary draft status based on the considerable progress made at this meeting and the relative stability of the text. Preliminary draft revision of Recommendation ITU-R M.1450-5, Characteristics of broadband radio local area networks [91] Annex 1.1 - Preliminary draft revision of Recommendation ITU-R M.1450-5 - Characteristics of broadband radio local area networks Documents retained their current status. Contributions are sought to the next meeting to advance work on these documents as well. Preliminary draft revision of Recommendation ITU-R M.1801-2, Radio interface standards for broadband wireless access systems, including mobile and nomadic applications, in the mobile service operating below 6 GHz [91] Annex 1.2 - [Preliminary] draft revision of Recommendation ITU-R M.1801-2 - Radio interface standards for broadband wireless access systems, including mobile and nomadic applications, in the mobile service operating below 6 GHz Both M.1450 and M.1801 are expected to be further elevated/advance the docs for final approval as revisions. Hassan Yaghoobi(Intel Corp.) Agenda Slide 12

July 2024 doc.: IEEE 802.11-24/1135r1 5A/93 ITU-R WP5B LS to WP5A (1/3) Liaison statement to ITU-R Working Party 5A (copy to World Meteorological Organization for information) - Solid-state transmitter radars and wireless access systems and radio local area networks in the 5 GHz frequency band In May 2024 Working Party (WP) 5B received contribution 5B/53 provided information on the future deployment of solid-state transmitter (SSTX) weather radars and the technical coexistence with WAS/RLAN in the 5 GHz frequency band. Frequency band 5 250-5 725 MHz is allocated on a primary basis to the radiolocation service and Nos. 5.446A and 5.450A of the Radio Regulations (RR). RR No. 5.450A states that in the 5 470-5 725 MHz band, the mobile service shall not claim protection from the radiodetermination services. The planned use of SSTX weather radars and current WAS/RLAN operation in the 5 GHz frequency band, in particular in the sub-band 5 600-5 650 MHz, may require further technical coexistence analysis. To facilitate this discussion, WP 5B suggests that the following topics be included in a joint meeting during the November 2024 meeting with WP 5A regarding the use of SSTX weather radars and WAS/RLAN: the technical and operational characteristics of SSTX weather radars in the 5 GHz band; the aspects related to the characteristics and application of DFS in Recommendation ITU R M.1652-1. Agenda Slide 13 Hassan Yaghoobi (Intel Corp)

July 2024 doc.: IEEE 802.11-24/1135r1 5A/93 ITU-R WP5B LS to WP5A (2/3) Future operation of weather radars in the 5 GHz frequency band with solid-state transmitters (SSTX) is covered in Recommendation ITU-R M.1849. More than 1 500 weather radars around the world, lifecycle of up to 20 years. Transition will take decades, even if the SSTX technology becomes common very quickly. Expected that both tube and SSTX will be used even in new system installations in the near future. Differences in the pulse characteristics of SSTX weather radars compared to tube-based weather radar Risk that this will reduce the capacity of RLAN DFS to detect radar signal in the 5 GHz band. Traditional tube Radars are short pulses with high power levels are transmitted. SSTX power is much lower (transmitted peak power, 4-8 kW vs 250-450 kW), leading to poorer detection performance in the RLAN device and possible decreased detection range of SSTX systems. Uncertainty on how RLAN devices will behave as the pulses transmitted by SSTX differ from the parameters assumed in RLAN device. Pulse compression can be up to 200 s (instead of 0.5 to 3.5 s for tube-based systems) to compensate average power. Pulse compression enables the utilization of longer pulses and lower-power transmitters without compromising range resolution. Agenda Slide 14 Hassan Yaghoobi (Intel Corp)

July 2024 doc.: IEEE 802.11-24/1135r1 Characteristics (1/2) Pulse compression ratio (PCR): the ratio of uncompressed pulse length to the compressed pulse. Long transmission pulse (x 60) with low peak power (15-20 dB less) can achieve a better and longer range. This exceeds the 15 dB margin for Dynamic Frequency Selection (DFS) detection in RLAN devices. Pulse compression allows the independent adjustment of range resolution and range sensitivity. Tube transmitters and SSTX sensitivity depends on transmitted energy (product of the pulse length multiplied by the peak power). Blind range is the range where the receiver is blocked during the transmission of the compressed pulse. SSTX still requires the transmission of a short uncompressed pulse. Technical parameters for tube-based and SSTX radar systems Tube based radar SSTX Frequency range 5.4-5.8 GHz Transmitter peak power 450 kW in total => 225 kW per polarization 2-8 kW per polarization Pulse length 0.5-3.5 s 200 s PRF 3 000 Hz Duty cycle 0,12 % 10% Agenda Slide 15 Hassan Yaghoobi (Intel Corp.)

July 2024 doc.: IEEE 802.11-24/1135r1 Characteristics (2/2) SSTX are also using short uncompressed pulses (approx. 1 s) to cover the blind range, caused by the transmission of the compressed pulse. DFS mechanism detects this. There are three ways to implement. Dual Pulse Transmission on the same frequency Dual pulse transmission on two separate frequencies (frequency separation between 3-6 MHz) Long pulse transmission only (future, to detect the short-range targets using a long-compressed pulse) Dynamic Frequency Selection (DFS) detection Compared with tube transmitters the SSTX transmitter power is much lower, leading to a poorer detection performance in the RLAN device and possible decreased detection range of SSTX systems. When both pulses are transmitted on the same frequency, the DFS detection algorithm might work better because the uncompressed short pulse is clearly separated and visible. The Radio Regulations (2020) incorporates the Recommendation ITU-R M.1652-1 (05/2011) Dynamic frequency selection in wireless access systems including radio local area networks for the purpose of protecting the radiodetermination service in the 5 GHz band by reference. The Recommendation ITU-R M.1849-3 (02/2023) Technical and operational aspects of ground-based meteorological radars addresses among other things the technical and operational characteristics of meteorological radars. The interference impact on weather radar system is more severe than the other way round. Agenda Slide 16 Hassan Yaghoobi (Intel Corp.)

July 2024 doc.: IEEE 802.11-24/1135r1 5A/93 ITU-R WP5B LS to WP5A (3/3) This presentation is given to Coex SC. Feedback from Nov WP5A-WP5B joint session will be given to 802.11 specifically Coex SC to be considered for possible next steps. ITU AHG can help with interacting with WP5A; technical discussions/contributions is expected to be happen in other 802,11 groups such as Coex SC. WP5A Contribution Tuesday 2024-11-19 - Friday 2024-11-29 IEEE 802 may need to participate and contribute to the subject starting November 2024. No contribution is required for November session. Coex SC may consider submitting a preliminary analysis if ready by November. Agenda Slide 17 Hassan Yaghoobi (Intel Corp)

July 2024 doc.: IEEE 802.11-24/1135r1 Ad Hoc Approval a. N/A Agenda Slide 18 Hassan Yaghoobi (Intel Corp.)

July 2024 doc.: IEEE 802.11-24/1135r1 Plan for Going Forward, New Business, Next Meeting Call for contributions on RLAN Coex with SSTX Radar 5 GHz band Working Party 5A Next Meeting Dates Tuesday 2024-11-19 - Friday 2024-11-29 M.1450 and M.1801: No IEEE contribution is required/expected Coex with SSTX Radar at 5 GHz: Monitor WP5A-WP5B joint discussion Next ITU AHG Meeting: IEEE 802 September Interim Session Any New Business? TBD Agenda Slide 19 Hassan Yaghoobi (Intel Corp.)

Appendix July 2024 doc.: IEEE 802.11-24/1135r1 ITU AHG Background Material 1. ITU-R M.1450-5 (R-REC-M.1450-5-201404-I!!PDF-E): Characteristics of broadband radio local area networks, (02/2014) https://mentor.ieee.org/802.18/dcn/19/18-19-0157-00-0000-an-update-on-the-recommendation-itu-r-m-1450-5.pptx 2. ITU-R M.1801-2 (R-REC-M.1801-2-201302-I!!PDF-E): Radio interface standards for broadband wireless access systems, including mobile and nomadic applications, in the mobile service operating below 6 GHz, (02/2013) https://www.itu.int/dms_pubrec/itu-r/rec/m/R-REC-M.1801-2-201302-I!!PDF-E.pdf IEEE 802 contributions to WP5A Decy 2020 Meeting under agenda item RLAN characteristics 1. Proposed modification to Recommendation ITU-R M.1450-5 [44] 2. Proposed modification to Recommendation ITU-R M.1801-2 [43] IEEE 802 contributions to WP5A Nov 2020 Meeting under agenda item RLAN characteristics 1. Proposed modification to Recommendation ITU-R M.1450-5 [154] 2. Proposed modification to Recommendation ITU-R M.1801-2 [153] IEEE 802 contributions to WP5A April-May 2021 Meeting under agenda item RLAN characteristics 1. Proposed modification to Recommendation ITU-R M.1450-5 [ 245 ] 2. Proposed modification to Recommendation ITU-R M.1801-2 [ 246 ] IEEE 802 contributions to WP5A Nov 2021 Meeting under agenda item RLAN characteristics 1. Proposed modification to Recommendation ITU-R M.1801-2 [ 439 ] 2. Proposed modification to Recommendation ITU-R M.1450-5 [ 438 ] IEEE 802 contributions to WP5A May-Jun 2022 Meeting under agenda item RLAN characteristics 1. Proposed modification to Recommendation ITU-R M.1801-2 [ 547 ] 2. Proposed modification to Recommendation ITU-R M.1450-5 [ 546 ] IEEE 802 contributions to WP5A Nov 2022 Meeting under agenda item RLAN characteristics 1. IEEE 802 S VIEWS ON ANNEX 17 TO DOCUMENT 5A/597[675] 2. Proposed modification to Recommendation ITU-R M.1450-5 [674] IEEE 802 contributions to WP5A May 2023 Meeting under agenda item RLAN characteristics 1. IEEE 802 S VIEWS ON ANNEX 17 TO DOCUMENT 5A/597 2. Proposed modification to Recommendation ITU-R M.1450-5 IEEE-01-E IEEE 802 contributions to WP5A Sep 2023 Meeting under agenda item RLAN characteristics 1. IEEE 802'S views on Annex 17 to Document 5A/597 [ 799 ] 2. Proposed modification to Annex 10 to Document 5A/769 (Recommendation ITU-R M.1801-2) [ 798 ] 3. Proposed modification to Annex 9 to Document 5A/769 (Recommendation ITU-R M.1450-5) [ 797 ] IEEE 802 contributions to WP5A Sep 2023 Meeting under agenda item RLAN characteristics 1. Proposed modification to Annex 6 to Document 5A/837 [ 40 ] Agenda Slide 20 Hassan Yaghoobi (Intel Corp.)

July 2024 doc.: IEEE 802.11-24/1135r1 Backup Agenda Slide 21 Hassan Yaghoobi (Intel Corp.)