End-to-End QoS Project Overview in IEEE 802.11-23 Documents

Nov 2023 doc.: IEEE 802.11-23/1206r2 WBA E2E QoS QoS over Wi-Fi Links Date: 2023-07-07 Authors: Name Ganesh Venkatesan Affiliations Address Intel Corporation Phone 503-334-6720 Ganesh.venkatesan@intel. com email 2111 NE 25th Ave, Hillsboro, OR 97124 Sukru.kuran@airties.com Mehmet Sukru Kuran Enis Akay Airties enisakay@meta.com Meta Elif.salik@lifemote.com Elif Dilek Salik Lifemote Submission Slide 1 Ganesh Venkatesan, Intel Corporation

Nov 2023 doc.: IEEE 802.11-23/1206r2 Abstract Summarization of the work done thus far in WBA E2E QoS project and call for participation. This is a follow up to the liaison letter from WBA to IEEE802.11 WG -- https://mentor.ieee.org/802.11/dcn/23/11-23-0838-01-0000-wba-liaison- re-qos.docx 1206r2: Added slides (slide 10 and beyond) to include topics related to End-to-End QoS enablement in wired/wireless (IEEE802.11) networks; related standard specifications and issues that may require work in IEEE802.11. Submission Slide 2 Ganesh Venkatesan, Intel Corporation

Nov 2023 doc.: IEEE 802.11-23/1206r2 Agenda 1. About WBA 2. About E2E QoS and its phases 3. E2E QoS Phase-1 overview focus on the Wi-Fi Link 4. Whitepaper 5. Test Plan, Field Trials and Phase-1 Report 6. Future Phases of E2E QoS 7. Call for Participation 8. Q&A Submission Slide 3 Ganesh Venkatesan, Intel Corporation

Nov 2023 doc.: IEEE 802.11-23/1206r2 About WBA Use standards-based implementations (across multiple OSI network layers), deploy them in real- world scenarios, collect Key Performance Indices and Demonstrate how known issues are mitigated and provide deployment guidelines, and/or Identify issues that may need additional standards work Develop technical specifications where needed Submission Slide 4 Ganesh Venkatesan, Intel Corporation

Nov 2023 doc.: IEEE 802.11-23/1206r2 About WBA E2E QoS and Phase-1 focus (QoS over Wi-Fi links) Identify common Use Cases where performance of QoS-Sensitive applications is poor Key: E2E QoS: Home-A Home-A Office to Conf-12 Home-B office to Conf-8 Home-A Office to Home-B Office Home-A Den to Home-B Den E2E QoS Phase-1 Wi-Fi Links within Home-A Wi-Fi Links within Home-B Wi-Fi Links within Acme Corporation Use off the shelf implementations of QoS mechanisms defined in IEEE802, IETF and WFA in real service provider networks to demonstrate how performance of QoS-Sensitive applications can be improved and sustained to acceptable levels. Home-A Den Laptop Home-A Office ACME Corporation Publish report(s) from the field trials to incentivize OS Vendors, Application Developers and Service Providers to implement and deploy relevant QoS Mechanisms. Office Cubicles Break Rooms Laboratories Identify bottlenecks leading to poor QoS and provide feedback to relevant SDOs for enhancements to existing mechanisms or development of new mechanisms Home-B 12 8 Home-B Den 6 Follow QoS-Specific developments in IEEE802, IETF and WFA and when corresponding implementations become available kickoff a new phase Home-B Office Laptop Submission Slide 5 Ganesh Venkatesan, Intel Corporation

Nov 2023 doc.: IEEE 802.11-23/1206r2 White Paper Overview WBA E2E QoS Phase-1 Whitepaper accessible via https://mentor.ieee.org/802.11/dcn/23/11-23-0838-01-0000-wba-liaison- re-qos.docx (the whitepaper is embedded in the document) Compilation of common residential and enterprise use cases including cloud gaming scenarios Residential use cases are limited to single AP topologies (EasyMesh topologies to be considered in the next phase) Discussion on higher layer optimizations for Queue Management for QoS optimization (e.g., CAKE, Per Hop Behavior, etc.) Appendix demonstrating effectiveness of Stream Classification Service (SCS) to maintain QoS Description of the test setup for trials Topics that are not directly related to QoS (e.g., channel selection, CODEC selection, ideal MCS selection) Submission Slide 6 Ganesh Venkatesan, Intel Corporation

Nov 2023 doc.: IEEE 802.11-23/1206r2 Test Plan, Field Trials and Phase-1 Report Test Plan with a set of test cases describing test setup and tools to assess Key Performance Indices (including ITU-T SG12 P1203/P1204 Recommendations based Objective MOS assessment) Working on including features from BBF TR-398 Field Trials are awaiting availability of off-the-shelf implementations supporting mechanisms defined in WFA QoS Management R1/R2 Technical Specification; and Service Provider Volunteers for the trial Does not include Triggered Access (.11ax/.11be) The goal is to compile the results from the trial and publish a report that includes guidelines for deploying networks that are tuned to provide the best QoS performance; and any bottlenecks discovered (potentially feedback to the relevant standards organization) Submission Slide 7 Ganesh Venkatesan, Intel Corporation

Nov 2023 doc.: IEEE 802.11-23/1206r2 Future Phases Extend the trials to WFA EasyMesh (that is WFA QoS Mgmt-aware) topology Include newer amendments/specifications from IEEE802.11 (.11be) and Wi-Fi Alliance (WFA QoS Mgmt R3) Adopt learnings from other technologies (e.g., DOCSIS) to Wi-Fi links optimizations both at the MAC layer and at higher layers Adopt media agnostic IETF RFCs that govern queue management across the nodes in the network to improve end-to-end QoS performance (also DETNET and RAW) Extend the study beyond the Wi-Fi link to maintain prioritization of QoS traffic over others resulting in optimized End-to-End QoS Submission Slide 8 Ganesh Venkatesan, Intel Corporation

Nov 2023 doc.: IEEE 802.11-23/1206r2 Call for Participation Native support in the OS Vendors for IEEE802.11/WFA QoS Mechanisms Collaborate with Microsoft Windows, Google Android, Apple iOS Documentation on what is currently supported in the OS for QoS (specifically QoS over Wi-Fi) QoS-Aware Applications Collaborate with Application Developers Service Provider Volunteers for trials (in Phase-1 and beyond) Feedback on additional Use Cases, network topologies to consider in future phases Submission Slide 9 Ganesh Venkatesan, Intel Corporation

Nov 2023 doc.: IEEE 802.11-23/1206r2 General Approach to mitigating latency issues At each node in the path between the Talker and the Listener, keep buffering small enough to meet latency requirements Proactively signal congestion conditions and Leverage drop-eligibility, if available Provide feedback to the Talker to take corrective action(s) E.g., adapt to congestion conditions by reducing requirements (drop to a lower video resolution, more aggressive compression, etc.) Other IEEE802.1 techniques like Congestion Avoidance, Congestion Isolation (IEEE802.1Q-2022 and IEEE802.1Qcz- 2023) Some implementation-specific strategies Distinct queues for latency-bound and non-latency-bound traffic (in some cases DSCP-agnostic) Submission Slide 10 Ganesh Venkatesan, Intel Corporation

Nov 2023 doc.: IEEE 802.11-23/1206r2 End-to-End QoS Enablement in Wired/Wireless (IEEE802.11) deployments Leveraging .1Qcz mechanisms (IEEE802.1Qcz-2023 Cl. 49) and IEEE802.1Q-2022 Clause 30 (Principles of Congestion Notification) Low Latency Low Loss Scalable Throughput (L4S) a fast and explicit feedback loop from the network node managing the queue latency to the end systems and applications Submission Slide 11 Ganesh Venkatesan, Intel Corporation

Nov 2023 doc.: IEEE 802.11-23/1206r2 What is needed? Decision on supported topologies Is Wi-Fi Mesh (not .11s) a candidate? Support for ECN IP Headers, LLDP TLV (Access Points) IEEE802.11 STAs need to be .1Q compliant does this mean support for .11ak? Support for Accurate ECN above the IP layer (e.g., RTP over UDP or TCP headers) L2 Signaling in 802.1 for support (in higher layers)? Submission Slide 12 Ganesh Venkatesan, Intel Corporation

Nov 2023 doc.: IEEE 802.11-23/1206r2 References https://mentor.ieee.org/802.11/dcn/23/11-23-2065-00-0wng- l4s-and-implications-for-wi-fi.pptx Greg White (CableLabs) L4S Architecture: https://www.ietf.org/archive/id/draft-ietf- tsvwg-l4s-arch-19.html Discussion on considerations prior to deploying L4S over Wi-Fi: domos.no/blog/an-introduction-to-l4s Submission Slide 13 Ganesh Venkatesan, Intel Corporation

Nov 2023 doc.: IEEE 802.11-23/1206r2 Backup Submission Slide 14 Ganesh Venkatesan, Intel Corporation

Nov 2023 doc.: IEEE 802.11-23/1206r2 Why E2E QoS in WBA? Field experience indicates poor QoS performance for common applications Deadlocked situation awaiting compelling reason for supporting QoS Mechanisms QoS issues mitigated with solutions that sometimes works (red arrow progression) WBA E2E QoS Charter break the deadlock and enable the blue arrow progression Field Experience E2E QoS is poor for common applications Explosion of QoS-Sensitive Applicsations Emergence of more demanding QoS-Sensitive Applicationa Deploy workarounds (e.g., Deep Packet Inspection and traffic classification) Excellent QoS Service Providers -- Waiting Waiting Issues from Field Experience Mitigated QoS Mechanism Aware Applications QoS Mechanisms Natively Exposed by the OS Performance Data with QoS Enabled Application Vendors -- Waiting Applications use the QoS Mechanisms Natively Exposed by the OS OS Vendors -- Waiting QoS Mechanisms Natively Exposed by the OS Deploy workarounds (middleware implementing Deep Packet Inspection and traffic classification) Submission Slide 15 Ganesh Venkatesan, Intel Corporation