1. doc.: IEEE 802.11-07/0105r0 Submission January 16, 2007 Todor Cooklev, Hitachi America Ltd.Slide 1 Requirements towards video over 802.11 Date: 2007-01-16Authors:

2. doc.: IEEE 802.11-07/0105r0 Submission January 16, 2007 Todor Cooklev, Hitachi America Ltd.Slide 2 Authors (cont.)

3. doc.: IEEE 802.11-07/0105r0 Submission January 16, 2007 Todor Cooklev, Hitachi America Ltd.Slide 3 Abstract The requirements towards video over 802.11 include: Video resolution and number of channels Multicast Power efficiency QoS management

4. doc.: IEEE 802.11-07/0105r0 Submission January 16, 2007 Todor Cooklev, Hitachi America Ltd.Slide 4 Video resolution and number of channels What video resolutions and data rates are of interest? –all resolutions, up to 1080p, –up to 48 Mb/s (The BlueRay HD format supports up to 48 Mb/s) Number of simultaneous channels? –For now, single-hop 3-4 video channels @ 25 Mb/s each, across 3 walls at a distance of 50 feet. In addition, one voice and one data channel should be supported. Aggregate capacity – 100 Mb/s. –For one video stream there could be multiple audio (e.g. multiple languages) and multiple data (Closed Captions) channels. –Furthermore, the synchronization of the different audio and data streams with the video stream is not an easy problem. –Depends on the product architecture!! (This is for further study).

5. doc.: IEEE 802.11-07/0105r0 Submission January 16, 2007 Todor Cooklev, Hitachi America Ltd.Slide 5 Multicast ? Multicast deserves further study. Multifamily dwellings are one important case. In the case of multicast transmission to several speakers, not only the speakers must be synchronized among themselves, but they must be synchronized with the video as well. Conclusion: It seems like multicast is a requirement even in the consumer marketplace. 802.11 needs to make multicast better and more efficient.

6. doc.: IEEE 802.11-07/0105r0 Submission January 16, 2007 Todor Cooklev, Hitachi America Ltd.Slide 6 Power efficiency Power efficiency is important for home networking. Video can be watched on laptops while they are battery powered. Therefore additional measures for power efficiency are appropriate. Power efficiency is a parameter that in general depends on both the PHY and the MAC.

7. doc.: IEEE 802.11-07/0105r0 Submission January 16, 2007 Todor Cooklev, Hitachi America Ltd.Slide 7 QoS management QoS management is, in general, the dynamic negotiation of a number of QoS parameters. Is a standard-based QoS management necessary? –It is important not to compromise other services that also require QoS. For example, E911. Video format negotiation is desirable. Some of this capability is provided by the DLNA (format, codec parameters). The quality of compressed video is subjective; negotiation of acceptable quality is important. Prioritization among multiple video streams is an important issue. (802.11e provides only one AC – video).

8. doc.: IEEE 802.11-07/0105r0 Submission January 16, 2007 Todor Cooklev, Hitachi America Ltd.Slide 8 Summary For one video channel, there could be multiple audio and data channels Multicast capability is required (and needs to be investigated more). Power efficiency is increasingly important QoS management is required –Video format negotiation –Prioritization among different video streams –Protect other services that require QoS