Doc.: IEEE 802.11-01/492r0 Submission Lim Wei Lih, Matsushita Electric Ind. Slide 1 July 2001 Comments on AV transmission Recommended Practice Yasuo HARADA,

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Presentation transcript:

doc.: IEEE /492r0 Submission Lim Wei Lih, Matsushita Electric Ind. Slide 1 July 2001 Comments on AV transmission Recommended Practice Yasuo HARADA, Lim Wei Lih, Shinichiro OHMI, Tan Pek Yew (Matsushita Electric Ind)

doc.: IEEE /492r0 Submission Lim Wei Lih, Matsushita Electric Ind. Slide 2 July 2001 Requirements for AV Transmission Bandwidth requirement –HD:24mbps x 1ch (unicast) –SD: 7mbps x 3ch (unicast) Guarantee of quality for AV stream –AV streams for interactive applications require very short delay –Enable AV delivery to be registered with HC –Longer term uninterrupted bandwidth allocation for AV delivery To avoid denial of service to other high priority non AV data

doc.: IEEE /492r0 Submission Lim Wei Lih, Matsushita Electric Ind. Slide 3 July 2001 Application Example Home Gateway Home Server Broad Band Network FTTH/ADSL/CATV BS/CS/DTV e 100Base-T Personal Computer 100Base-T Broadband STB 100Base-T HDTV 5G Network Contents Storage

doc.: IEEE /492r0 Submission Lim Wei Lih, Matsushita Electric Ind. Slide 4 July 2001 Protocol Stack IEC61883 AV Data IEEE MAC IEEE PHY IEEE LLC IP TCP/UDP LAN Data AV/ Command AV PAL AV Data AV/ Command (RTP etc) 1394 SystemIP System

doc.: IEEE /492r0 Submission Lim Wei Lih, Matsushita Electric Ind. Slide 5 July 2001 Allocation Structure TBTT Beacon PIFS QoS Request Registration PIFS QoS TXOP Allocation PIFS Contention Free Period DIFS Contention Base Repeat i times Repeat j times Repeat k times Phase 2 : TXOP w/o Registration Phase 1 : TXOP with Registration 0..1 time

doc.: IEEE /492r0 Submission Lim Wei Lih, Matsushita Electric Ind. Slide 6 July 2001 Realization Example of AV transmission 24Mbps over PHY 36Mbps Nominal MSDU size: 1402 bytes –IP header + UDP header + MPEG2-TS Polling Interval: 7 TU Maximum Burst: 18 Data Packets Delay Bound: 70 TU No FEC Inactivity Interval: 1000 (5 sec)

doc.: IEEE /492r0 Submission Lim Wei Lih, Matsushita Electric Ind. Slide 7 July 2001 Comments on Recommended Practice Doc for AVSG Delay-ACK delivery rules Registration Signaling mechanism for AV transmission –Sender initiative (to achieve diff serv) Direct ESTA-To-ESTA Transmission Realization of 24Mbps AV transmission over PHY 36Mbps