Facilitating robust multicast group management

Authors:
Avijit Sen Mazumder;Kevin Almeroth;Kamil Sarac
Affiliations:
UC-Santa Barbara, Santa Barbara, CA;UC-Santa Barbara, Santa Barbara, CA;University of Texas at Dallas, Richardson, TX
Venue:
NOSSDAV '05 Proceedings of the international workshop on Network and operating systems support for digital audio and video
Year:
2005

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Abstract

Multicast is a key service for many audio and video applications, yet it continues to be a challenging Internet service to deploy. While much attention has been given to a number of problems associated with multicast, two closely related problems in particular have received almost no attention. First, there is essentially no host support for dealing with the variety of ways to join a multicast group, and second, there is a complete absence of group join success or failure feedback from the network. The lack of a straightforward way to robustly join a multicast group and then to know whether the join has been successful is possibly the biggest limitation for multicast application developers today. In this study we develop a robust solution to determine the existence and nature of multicast service in the network. We consider two options: (1) the use of existing protocol features to extract the required information, and (2) the introduction of new protocol extensions to directly query the network. Our results indicate that while a truly robust group join is possible only when there is network support, these additional changes are difficult to deploy. Our evaluation implements a proof-of-concept prototype to determine the existence and nature of the multicast service in the network.