Hello, We will have an Unofficial Meeting of Scalable Small Group Multicast(SSGM) for IRTF 3/19 20:00-23:00（CST) @ Hilton Anatole (Same hotel of IETF 65th) If you attend the IETF, please come to the meeting too. The room will be assigned by secretariat but not decided yet, But we will announce by put the note on the message board, updating the wiki page below and send place announcement on this ML as soon as she would tell the place. http://www1.tools.ietf.org/bof/trac/wiki -- Yuji IMAI / WIDE Project - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - === Call for participants === Unofficial Meeting of Scalable Small Group Multicast(SSGM) for IRTF http://www.net.itc.nagoya-u.ac.jp/SSGM/ Date : March 19, 2006 (20:00--23:00) Place: Room <TBD> , Hilton Anatole (Same hotel of IETF 65th), Dallas TX, USA Room will be announced on the MLs and the message board. IP Multicast has proved useful in transmitting information such as voice and video to large groups. It has been used to broadcast IETF Working Group meetings to remote participants and will provide a suitable foundation for broadcasting TV programs across the Internet. On the other hand, IP multicast is not well suited to small groups. As the Internet Architecture Board stated in RFC 2902, "Providing for many groups of small conferences ... scales badly given the current multicast model." The ability to efficiently support "small groups" will be important for VoIP conference calls, for videoconferencing and for multi-media e-meetings and as a result several alternative approaches have emerged for the problem of "small group communications". These include. * ALM ([ESM],[YOID],[NICE],[ALMI],[TAG],[DTO],[CAN],[BAYEUX]) * Overlay Multicast([SCX],[OVERCAST],[RMX],[MSN],[OMNI],[AKAMAI],[IBEAM]) * XCAST ([XCID],[XCUG],[XCP],[GXC],[XMIP],[XCBCP]) These make it easy for end-users to start using multi-party communications since they use a datagram distribution layer that is based on ordinary unicast routing. As these alternative approaches have appeared relatively recently, issues remain to be worked out. These issues are discussed in several research papers ([TAON], [SROU], [CMP], [ITOL], [PAA], [EEA]) and include: * Long latency * Selfish routing and bandwidth consumption * Slow routing convergence * Routing instability * Difficulties in deployment and maintenance * Inefficient tree topology Using these technologies as the basis for group communication without solving these problems would cause serious conflicts between carriers and users concerned with bandwidth usage similar to traffic load of popular file sharing systems like Kazaa, Napster, Winny and Bittorrerant. The purpose of the ad hoc meeting is 1. share the results of the various research groups. 2. identify the set of problems that remain to be addressed 3. get rough consensus on the direction and next steps that should be taken to address the problem of small group communication. We expect that the results of this meeting will be reported to the IRTF chair and shared within the IETF/IRTF as well as in the broader academic and engineering community to accelerate the development of novel and useful mechanisms for small group communications. * Agenda 20:00 - 20:05 - Agenda Bash * 20:05 - 21:25 (15 min each) 1. Overlay Multicast and SSGM (Prof. Mark Pullen, GMU) 2. Application Layer Multicast and SSGM (Prof. Bobby Bhattacharjee UMD) 3. XCAST and SSGM (Yuji Imai, WIDE Project) 4. Selfish Routing Implications (Prof. Lili Qiu, UT Austin) 5. Problem statements (Prof. Yoichi Shinoda, JAIST/WIDE Project * 21:30 - 23:00 Draft charter Presentation & General Discussion * Invited Observers - Prof. Kevin Almeroth, UCSB Multicast Expert - Prof. Henning Schulzrinne, Columbia SIP, RTP - Aaron Falk, IRTF chair/ISI -- Yuji IMAI (WIDE Project) John Buford (Panasonic) Rick Boivie (IBM) Bobby Bhattacharjee(UMD) Reference [2902] S. Deering, S. Hares, C. Perkins, R. Perlman, "Overview of the 1998 IAB Routing Workshop", RFC2902, August 2000. [ESM] Y.-H. Chu, S. G. Rao, and H. Zhang. A case for end system multicast. In Proceedings of ACM Sigmetrics, June 2000. [YOID] P. Francis. Yoid: Extending the Multicast Internet Architecture. White papar, http://www.aciri.org/yoid/ [NICE] S. Banerjee, C. Kommareddy, and B. Bhattacharjee. Scalable application layer multicast. In Proceedings of ACM SIGCOMM, Aug. 2002. [ALMI] D. Pendarakis, S. Shi, D. Verma, and M. Waldvogel. ALMI: An application level multicast infrastructure. In Proceedings of the 3rd USENIX Symposium on Internet Technologies and Systems, Mar. 2001. [TAG] M. Kwon and S. Fahmy. Topology aware overlay networks for group communication. In Proceedings of NOSSDAV, May 2002 [DTO] J. Liebeherr, M. Nahas, and W. Si. Application-layer multicasting with delaunay triangulation overlays. IEEE Journal on Selected Areas in Communications, 20(8):1472?1488, Oct. 2002. [CAN] S. Ratnasamy, M. Handley, R. Karp, and S. Shenker. Applicationlevel multicast using content-addressable networks. In Proceedings of NGC, Nov. 2001. [BAYEUX] S. Q. Zhuang, B. Y. Zhao, A. D. Joseph, R. H. Katz, and J. D. Kubiatowicz. Bayeux: An architecture for scalable and fault-tolerant wide-area data dissemination. In Proceedings of NOSSDAV'01, June 2001 [SCX] Y. Chawathe, S. McCanne, and E. A. Brewer. An Architecture for Internet Content Distributions as an Infrastructure Service, 2000. Unpublished, http://www.cs.berkeley.edu/yatin/papers/ [OVERCAST] J. Jannotti, D. K. Gifford, K. L. Johnson, M. F. Kaashoek, and J. W. O. Jr. Overcast: Reliable multicasting with an overlay network. In Proceedings of USENIX Symposium on Operating Systems Design and Implementation, Oct. 2000. [RMX] Y. Chawathe, S. McCanne, and E. A. Brewer. RMX: Reliable multicast for heterogeneous networks. In Proceedings of IEEE INFOCOM, Mar. 2000. [MSN] S. Shi and J. S. Turner. Routing in overlay multicast networks. In Proceedings of IEEE INFOCOM, June 2002. [OMNI] S. Banerjee, C. Kommareddy, K. Kar, B. Bhattacharjee, and S. Khuller. Construction of an efficient overlay multicast infrastructure for real-time applications. In Proceedings of IEEE INFOCOM, Apr. 2003. [AKAMAI] Akamai Technologies, Inc. http://www.akamai.com/ [IBEAM] iBeam Broadcasting Corp. http://www.ibeam.com/ [XCID] R. Boivie, N. Feldman , Y. Imai , W. Livens , D. Ooms, O. Paridaens, E. Muramoto, "Explicit Multicast (Xcast) Basic Specification", draft-ooms-xcast-basic-spec-08.txt, July.2005. [XCUG] Yuji Imai, Hiro Kishimoto, Myung-Ki Shin, Young-Han Kim, "XCAST6: eXplicit Multicast on IPv6", IEEE/IPSJ SAINT2003 Workshop 4, IPv6 and Applications, Orland, Jan.2003 [XCP] S. Myung-KI, K. Yong-Jin, P. Ki-Shik, and K. Sang-Ha. Explicit multicast extension (Xcast+) for efficient multicast packet delivery. ETRI Journal, 23(4), December 2001. [GXC] A. Boudani, A. Guitton, B. Cousin. GXcast: Generalized Explicit Multicast Routing Protocol. 9th IEEE Symposium on Computers and Communications (ISCC 2004) [XMIP] Jiwoong Lee, Explicit Multicast over Mobile IP (XMIP) , [XCBCP] C. Hsu, E.Muramoto, J. Buford,et al,Best Current Practices of XCAST (Explicit Multi-Unicast) by 2004, [TAON] Junghee Han, David Watson, and Farnam Jahanian, Topology Aware Overlay Networks, INFOCOM 2005 [SROU] Lili Qiu, Yang Richard Yang, Yin Zhang, Scott Shenker, On Selfish Routing in Internet-Like Environments, SIGCOMM 2003 [CMP] Li Lao, Jun-Hong Cui, Mario Gerla, Dario Maggiorini,A Comparative Study of Multicast Protocols: Top, Bottom, or In theMiddle?, UCLA, GI2005 [ITOL] Zhi Li and Prasant Mohapatra,The Impact of Topology on Overlay Routing Service, SIGCOMM 2003 [PAA] Zhu, W.; SunGuestEditor, M.-T.; ChenGuestEditor, L.-G.; Sikora, T,Proceedings of the IEEE Volume 93, Issue 1, Jan 2005 [EEA] Wenjie Wang, Cheng Jin, Sugih Jamin, Network Overlay Construction under Limited End-to-End Addressability,INFOCOM2005 ----- ug at xcast.jp_NOSPAM WIDE Project _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf