May 2001 Doc IEEE 802 11 01274 AV

May 2001 Doc. : IEEE 802. 11 -01/274 AV Multicast for 802. 11 e: Benefits/Challenges Sharp Corporation John Kowalski Submission John M. Kowalski et al, Sharp.

May 2001 Doc. : IEEE 802. 11 -01/274 CONTENTS • • • Multicast Applications Limitations of Current & Draft Standard Requirements for AV Multicast Options to meet this challenge Discussion Points of AV Multicast Summary Submission John M. Kowalski et al, Sharp.

May 2001 Doc. : IEEE 802. 11 -01/274 Multicast Application – 1 • For the Home Application, there are many AV devices. • “ 1 to n” communication will be necessary especially for the AV application. - e. g. Tuner and TV TV on 2 nd floor Mobile Viewer BS/CS Tuner CATV STB Submission TV in Living room John M. Kowalski et al, Sharp.

May 2001 Doc. : IEEE 802. 11 -01/274 Multicast Application – 2 • For the Home Application, Several AV devices will be used for realizing the one AV application. – e. g. Home theater System Stereo Monitor DVD Player Rear surround speaker Submission John M. Kowalski et al, Sharp.

May 2001 Doc. : IEEE 802. 11 -01/274 Multicast Application – 3 • For Office, Multicast also might be useful. – e. g. Video conference System VIDEO Sharing White Board Sharing Center Projector Submission John M. Kowalski et al, Sharp.

May 2001 Doc. : IEEE 802. 11 -01/274 Limitations of Current & Draft Standard • Multicast groups need to be defined -that take advantage of 11 e- in order to do true multicasting (as opposed to multiple synch’d streams) • AND – Multicast is an unacknowledged service (in 802. 2) – BUT we need some ACK mechanism at least in the near term. Submission John M. Kowalski et al, Sharp.

May 2001 Doc. : IEEE 802. 11 -01/274 Discussion Points of AV Multicast • Groupcast address definition for AV Multicast – Which kind of address should be used? – How to make a standard? • Grouping sequence – How to decide the address? HC? Image source? – How does the ESTA join the group? – How to inform the group address? Submission John M. Kowalski et al, Sharp.

May 2001 Doc. : IEEE 802. 11 -01/274 Requirements for AV Multicast • For realizing the AV application, the followings are required for the Multicast transfer. – Forward error collection (RS-code) – Delayed Acknowledgement – Retransmission mechanism Submission John M. Kowalski et al, Sharp.

May 2001 Doc. : IEEE 802. 11 -01/274 So what are our options? (1) • Do nothing – Positive: We don’t have to do anything. – Negative: We miss out on a huge application market OR use multiple synch’d streams, which are horrendously inneficient. Submission John M. Kowalski et al, Sharp.

May 2001 Doc. : IEEE 802. 11 -01/274 So what are our options? (2) • Work with 802. ? to develop recommended practice for Qo. S enabled multicast groups with acknowledged service – Positive: Would provide a single solution for all 802. X wireless systems. Long term solution – Negative: Takes time. Problems with legacy equipment? Submission John M. Kowalski et al, Sharp.

May 2001 Doc. : IEEE 802. 11 -01/274 So what are our options? (3) • Provide a solution that works for 802. 11 – Positive: Would harmonize well with work going on to integrate 802. 11 with AV/1394 systems. Could be done relatively quickly. – Negative: Would have to provide an interface, and services that would not be conformant to current 802. 2 standard. Submission John M. Kowalski et al, Sharp.

May 2001 Summary Doc. : IEEE 802. 11 -01/274 • We believe the AV multicast expands the wireless application market greatly for 802. 11. • We want to start the discussion about the AV multicast. • Any help/additional options would be greatly appreciated. Submission John M. Kowalski et al, Sharp.