IEEE 802.11-23/2118r0 End-to-End QoS Optimization Project
"Explore the IEEE 802.11-23/2118r0 project focusing on improving end-to-end Quality of Service (QoS) over Wi-Fi links. The project delves into latency optimization, higher layer protocol integration, congestion management, and network enablement for wired/wireless deployments. Join the discussion on key implementation requirements and supported topologies."
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Nov 2023 doc.: IEEE 802.11-23/2118r0 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 Submission Slide 1 Ganesh Venkatesan, Intel Corporation
Nov 2023 doc.: IEEE 802.11-23/2118r0 Abstract Document 23/1206 was presented in the July 23 Plenary where we described the WBA E2E QoS project Phase-1. We also mentioned a Phase-2 of the project where E2E QoS (optimizing QoS end-to- end over links that are not exclusively IEEE802.11 links). This presentation is a follow up, identifying higher layer protocols for latency optimization, and intends to start a discussion to determine (a) What information needs to be exchanged between the IEEE802.11 MAC layer and higher layers to facilitate higher layer protocols over IEEE802.11 MAC? (b) Is there a need for over-the-air signaling between IEEE802.11 MAC peers? And if so, what are they? (c) Is there any implementation requirements in the IEEE802.11 MAC layer to support the higher layer functions/features? Submission Slide 2 Ganesh Venkatesan, Intel Corporation
Nov 2023 doc.: IEEE 802.11-23/2118r0 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 3 Ganesh Venkatesan, Intel Corporation
Nov 2023 doc.: IEEE 802.11-23/2118r0 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 4 Ganesh Venkatesan, Intel Corporation
Nov 2023 doc.: IEEE 802.11-23/2118r0 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 Network Congestion Notification above the IP layer (e.g., RTP over UDP or TCP headers) L2 Signaling in 802.1 for support (in higher layers)? Submission Slide 5 Ganesh Venkatesan, Intel Corporation
Nov 2023 doc.: IEEE 802.11-23/2118r0 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 6 Ganesh Venkatesan, Intel Corporation
Nov 2023 doc.: IEEE 802.11-23/2118r0 Backup Submission Slide 7 Ganesh Venkatesan, Intel Corporation
