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Enhancing Internet Efficiency Through Multicast Strategies: Challenges and Innovations

This paper discusses the current state and challenges of Internet multicasting, emphasizing its limited efficiency during media distribution and file sharing due to slow routing adaptations and high operational costs. It explores the potential of overlay multicast networks, such as Bayeux and P2P, and presents research areas including tree construction and maintenance. The importance of deploying multicast strategies in real-time applications, such as VoIP and multimedia conferencing, is highlighted, along with possible advancements in digital broadcasting technologies.

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Enhancing Internet Efficiency Through Multicast Strategies: Challenges and Innovations

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  1. Multicasting is (only) half the Internet Mar 19, 2006 Yoichi Shinoda JAIST & WIDE shinoda@jaist.ac.jp

  2. The Multicast Spectrum Unicast (Broadcast) Overlay Multicast - Bayeux, ALMI, TAG, P2P... - IP Multicast - PIM-SIM, DVMRP... - Good for large-scale media distribution, but -  large size of routing table - Slow adaptation to changes in routing topology (Long convergence time) Good for file sharing, but -  Limited bandwidth in the first mile -  Large end-to-end delay - Overlay network does not map well on top of the underlying IP networks: * Very costly to network providers * Hard to conduct Traffic Engineering The Ideal Multicast Spectrum X C A S T Overlay Multicast - Bayeux, ALMI, TAG, P2P... - IP Multicast -PIM-SIM, DVMRP... - • Areas for possible research cooperation • Tree construction, Tree Maintenance • (e.g., ALM) • Router-Assisted schemes and • mechanisms (e.g., Active-Net) Good for delay-sensitive & interactive applications, such as VoIP, Video or Multi-media conferences - scalability with respect to the number of groups - rapid adaptation to changes in routing topology - no limited bandwidth in the first mile

  3. I would like to see the contribution of new RG End of Analog surface TV transmission (Japan) IP multicasted TV broadcasting All Digital TV will have ethernet(& tcp/ip) Environment 2006 2007 2008 2010 2011 2009 SGM service Draft-irtf-ssgm-sgm-taxomony, etc Proposed standard Research paper activities SSGM Commercial products and services IRTF RG SSGM IETF WG L3 L5 WG ALM L４ WG OMcast XCAST L3 WG Large testbed accelerates R&D L4 congestion control L5 P2P signaling Host Identity Real time Application StarBED , AnyBED ,NetBED PlanetLab GENI

  4. Candidate subject on SSGM Draft-irtf-ssgm-sgm-taxonomy-xx.txt Maintenance cost of proxy Convergence E2E Latency # of recievers ・・・・ Selfish? # of groups IP Multicast ASM SSM XCAST XCAST4 XCAST6 XCAST+ Just an example Overay Mulitcast OMcast Akamai ALM End System Multicast NICE ALMI

  5. R&D acceleration with large testbedsFor example, the StarBED • Internet emulator • 700 PCs, 1500-10000 when VM-mplx’ed • 10Gbps Internet(IPv4/IPv6) Connection • Features • Experimenter can • Configure them in any topology • {with,without} Internet connection • Automation tools • Install/Configure OS automatically • Configure topology for various scenarios StarBED http://www.starbed.org Possible Methodology + StarBED Overlay netwroking Like Planetlab/GENI Acceleration of SSGM-RG activity

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