Building Dynamic Multicast Trees in Mobile Networks
As group applications become more prevalent, efficient network
utilization becomes a major concern. Multicast transmission may use
network bandwidth more efficiently than multiple point-to-point
connections. Many algorithms have been proposed for generating "good"
multicast trees, however, these algorithms have significant
limitations for networks containing mobile hosts. Existing algorithms
either do not support changes to the multicast group while building
the tree or impose unrealistic restrictions, such as prohibiting
overlapping modifications or forcing regeneration of the tree after
each change. Clearly, to extend the range of applications that depend
on multicast communication to mobile hosts, multicast tree algorithms
must provide a flexible means for participants to join and leave the
multicast group. We propose an efficient distributed algorithm that
supports dynamic changes to the multicast group during tree building
and allows overlapping join/leave operations. In this paper, we
present the algorithm and initial simulation results.
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Last updated by Loren Schwiebert Email: on Jun-06-2001