37th Annual IEEE Conference on Local Computer Networks (2012)
Clearwater Beach, FL, USA USA
Oct. 22, 2012 to Oct. 25, 2012
Sebastian Meiling , iNET Research Group - Department Informatik, Hamburg University of Applied Sciences, Berliner Tor 7, 20099, Germany
Thomas C. Schmidt , iNET Research Group - Department Informatik, Hamburg University of Applied Sciences, Berliner Tor 7, 20099, Germany
Matthias Wahlisch , Institut für Informatik, Freie Universität Berlin, Takustr. 9, 14195, Germany
Group communication plays an important role in the distribution of real-time data for IPTV, multimedia conferencing, or online multiplayer games, but IP multicast remains unsupported in today's global Internet. Hybrid solutions that bridge between overlay and underlay multicast are a promising escape from the deployment dilemma of multicast. In this paper, we examine the real-time capabilities of hybrid multicast in a globally distributed environment based on our adaptive architecture H8Mcast within the Planet-Lab testbed. We present a large-scale measurement study and analysis of one-way packet delay distributions in several realistic group scenarios. The unique results in global traces of hybrid multicast data have been achieved by carefully tracking packets and continuously correcting clock offsets. Companion measurements of unicast-based distribution are part of our analysis, as well as the comparative discussion of our results with previous findings from theory and simulation. Our measurements reveal that about 50% of global group members experience a real-time compliant service within the conversational time bounds of 150 ms.
Delay, IP networks, Extraterrestrial measurements, Synchronization, Unicast, Receivers, Servers, performance evaluation, Network measurement, global group communication
S. Meiling, T. C. Schmidt and M. Wahlisch, "Large-scale measurement and analysis of one-way delay in hybrid multicast networks," 37th Annual IEEE Conference on Local Computer Networks(LCN), Clearwater Beach, FL, USA USA, 2012, pp. 513-520.