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Unofficial IRTF meeting of SSGM (Scalable Small Group Multicast) - Why we are here? -

UG (Yuji IMAI) XCAST fan club Evangelist (Past Co-chair) of WIDE XCAST WG. Unofficial IRTF meeting of SSGM (Scalable Small Group Multicast) - Why we are here? -. Raise your hands!. Who has been taught “what multicast is” in the lecture?

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Unofficial IRTF meeting of SSGM (Scalable Small Group Multicast) - Why we are here? -

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  1. UG (Yuji IMAI) XCAST fan club Evangelist (Past Co-chair) of WIDE XCAST WG Unofficial IRTF meeting of SSGM (Scalable Small Group Multicast)-Why we are here?-

  2. Raise your hands! • Who has been taught “what multicast is” in the lecture? • Who experienced video-conference by multicast (or alternatives, OM, ALM, XCAST)? • Who did from your research lab in univ./office? • Who did from your home?

  3. Raise your hands! • Who has been taught “what multicast is” in the lecture? • Who experienced video-conference by multicast (or alternatives, OM, ALM, XCAST)? • Who did from your research lab in univ./office? • Who did from your home? • Who believe that your partner can establish a multicast based world-wide conference call using existing technologies?

  4. Let's get rough consensus, first. • Group address multicast did almost complete standardization and get into real business world. • mboned, MBGP, (PIM, rmt, msec...) • Digital TV redistribution is about to start on v6 multiast. • On the other hand, it was stated as the IAB note. (RFC 2902) • “For example, providing for many groups of small conferences (a small number of widely-dispersed people) with global topological scope scales badly given the current multicast model.”

  5. Let's get rough consensus, first. • Recently, several alternative schemes were proposed. It looks working well in testbed. • It's because there are strong demands for SSGM (Scalable Small Group Multicast). • Especially from academic. Still in research quality. • They state “future works” in their paper by themselves.

  6. Let's gather and discuss. • Listed up the significant works. • Application Layer Multicast • Overlay Multicast • eXplicit Multi-Unicast • Selfish-routing • Gather them and show&know us each other. • What's the goal? • Same, different, Sharing partially? • What we enabled? • Is it really impossible by group address multicast? • What we have to solve. What is remained?

  7. What's we can do together? • Spin-out achievements, step by step. • Find and summarize the current best researches. • What we did, what we didn't. • What we should do. • Collaborate to make current researches matured. • To share rough goals and clarified problems. • To evaluate each others. • To share test-beds if necessary. • To report and recommend for community as RFC via IAB/IETF. • Not to select 1 beautiful scheme. (Not one-fit all approach.) • Spin-out results for IETF one by one. • Like RSVP, Diffserv, MPLS, msec, reliable multicast....

  8. Purpose & issues, for example. • Purpose of research group • To explore the problems and issues related to a scalable solution for user-oriented small group multicast. • Example issues • Long latency / Inefficient tree topology • Selfish routing and congestion avoidance • Slow routing convergence / Routing instability • Difficulties in deployment and maintenance • Group membership / Session management • Harmonize w/ group address multicast

  9. Agenda bushing • 20:00 - 20:05 Opening & Agenda Bash • 20:05 - 21:25 show & know each other (15min) • Overlay Multicast and SSGM (Prof. Mark Pullen, GMU) • Application Layer Multicast and SSGM (Prof. Bobby Bhattacharjee UMD) • XCAST and SSGM (Yuji Imai, WIDE Project) • Selfish Routing Implications (Prof. Lili Qiu, UT Austin) • Problem statements (Prof. Yoichi Shinoda, JAIST/WIDE Project • 21:30 - 23:00 Discussion & Draft charter

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