1. doc.: IEEE 802.11-06/0360r0 Submission March 2006 Todor CooklevSlide 1 Update on HD Video over WLAN Notice: This document has been prepared to assist IEEE 802.11. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE 802.11. Patent Policy and Procedures: The contributor is familiar with the IEEE 802 Patent Policy and Procedures, including the statement "IEEE standards may include the known use of patent(s), including patent applications, provided the IEEE receives assurance from the patent holder or applicant with respect to patents essential for compliance with both mandatory and optional portions of the standard." Early disclosure to the Working Group of patent information that might be relevant to the standard is essential to reduce the possibility for delays in the development process and increase the likelihood that the draft publication will be approved for publication. Please notify the Chair as early as possible, in written or electronic form, if patented technology (or technology under patent application) might be incorporated into a draft standard being developed within the IEEE 802.11 Working Group. If you have questions, contact the IEEE Patent Committee Administrator at.http:// ieee802.org/guides/bylaws/sb-bylaws.pdfstuart.kerry@philips.compatcom@ieee.org Date: 2006-03-08 Authors:

2. doc.: IEEE 802.11-06/0360r0 Submission March 2006 Todor CooklevSlide 2 Abstract We make a summary of our activities on HD video over WLAN. We discuss trends, use-cases in HD video, and relevant MAC enhancements with respect to these cases. We discuss the scope of a possible amendment to 802.11.

3. doc.: IEEE 802.11-06/0360r0 Submission March 2006 Todor CooklevSlide 3 Outline Motivation and goals HD video trends Scenarios General criteria Possible standard architecture Possible scope Relationship to other 802.11 activity Conclusions

4. doc.: IEEE 802.11-06/0360r0 Submission March 2006 Todor CooklevSlide 4 Motivation and goals Entertainment use-cases are challenging LAN evolution HD video content is fast becoming mainstream WLAN most convenient solution for local area entertainment networking TGk, TGv, TGt can enable higher level of QoS Our goals are: –Build on 802.11e (QoS) and 802.11n (throughput) –Leverage also 802.11k, 802.11v, 802.11t for QoS –Consider additional video-specific MAC improvements –Position 802.11 as the foundation for future entertainment networking

5. doc.: IEEE 802.11-06/0360r0 Submission March 2006 Todor CooklevSlide 5 Scenarios Environments –Home - support multiple HD video streams at meaningful range, seamlessly with voice, data, gaming traffic –Office – corporate video broadcasts; training –Airplane, train, bus - support multiple HD video streams in various network architectures –Other – hotels (elevators ), convention centers, gaming arcade, etc. Network architectures –Point to multi-point (e.g. Home video distribution from media server) –Point to point (e.g. Cam-coder to PC) Transmission –Unicast/Multicast/Broadcast Devices –Video storage devices –Gateways / STBs –Game consoles –HD video displays

6. doc.: IEEE 802.11-06/0360r0 Submission March 2006 Todor CooklevSlide 6 General criteria Little or no mobility Primary metric - video quality –must be the same as wired! Secondary metrics –Bandwidth –Latency –Jitter –Packet loss –Inter stream synchronization (Broadcast) Network performance –Capacity - number of simultaneous streams

7. doc.: IEEE 802.11-06/0360r0 Submission March 2006 Todor CooklevSlide 7 Possible standard architecture MAC PLCP Sublayer PMD Sublayer MAC Management Sub-entity PHY Management Sub-entity Data Link Layer Physical Layer HD Video specific MAC extensions

8. doc.: IEEE 802.11-06/0360r0 Submission March 2006 Todor CooklevSlide 8 Possible scope I HD Video MAC 802.11 PHY 802.11e Extensions- Multicast, Broadcast Improved Access Methods Content Protection Error Concealment, FEC/Rate Adaptation Bandwidth Prediction Real-time Video Quality Assessment Influencing Video-specific Technologies Core MAC Enhancements

9. doc.: IEEE 802.11-06/0360r0 Submission March 2006 Todor CooklevSlide 9 Possible scope II An amendment to the 802.11 MAC –PHY independent! MAC enhancements –Multi-dimensional QoS (not just priority, but PER, jitter) –High network throughput (possibly multi-channel operation) –Supports multicast and broadcast Video-specific technologies –Content-specific dynamic link rate adaptation may be specified –Stream-based FEC (possibly packet-based) –Error Concealment: Transmission parameters and WLAN operation that optimizes video quality. –Bandwidth Prediction: It is important for HD video streams which require huge bandwidth allocation –Content protection (security)

10. doc.: IEEE 802.11-06/0360r0 Submission March 2006 Todor CooklevSlide 10 Relationship to other 802.11 activity 802.11k (RRM) –channels; time channel busy; load, etc. 802.11v (management) –rate control, channel selection, etc. 802.11u (interworking) –affects end-to-end QoS 802.11t –Test Conditions – bidirectional, unidirectional, etc. –Secondary metrics - latency, jitter, packet loss –Primary metric - VoIP Quality –Video quality? (802.11t is moving towards testing video quality) The network has a lot more information than before. The next step is to use this information to achieve higher QoS.

11. doc.: IEEE 802.11-06/0360r0 Submission March 2006 Todor CooklevSlide 11 Conclusions HD video over WLAN represents a very broad opportunity The envisioned here 802.11 video-specific amendment builds on 802.11e, 802.11n, and also on the work of other relevant Task Groups to achieve a higher level of QoS We feel this is worthy of future study within 802.11 We welcome comments and feedback

12. doc.: IEEE 802.11-06/0360r0 Submission March 2006 Todor CooklevSlide 12 References 1.Emily Qi, 11-05-1615-02-000k-qos-metrics 2.Sasha Tolpin, 11-05-0949-00-000t-presentation-latency-sensitive- applications-metrics 3.Philip Corriveau, 11-05-0887-00-000t-video-testing-strategy 4.Cheng Hong, 11-05-0721-00-000u-qos-in-wlan-interworking 5.Omer Ben-Shalom, 11-05-0420-01-0wng-multicast-over-wlan 6.Amjad Soomro, 11-05-0164-02-000k-monitoring-qos-delays-in-802-11- wlans 7.Simon Black, 11-05-0074-00-000k-qos-statistics 8.Royce Fernald, 11-06-0144-01-000t-video-over-wireless-methodology 9.Chris Trecker, 11-06-0005-00-000t-test-methodology-measuring-loss-delay- and-jitter 10.Fahd Pirzada, 11-05-0951-00-000t-streaming-media-performance