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Multicast routing with end-to-end delay and delay variation constraints

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2 Author(s)
Rouskas, G.N. ; Dept. of Comput. Sci., North Carolina State Univ., Raleigh, NC, USA ; Baldine, I.

We study the problem or constructing multicast trees to meet the quality of service requirements of real-time interactive applications operating in high-speed packet-switched environments. In particular, we assume that multicast communication depends on: (1) bounded delay along the paths from the source to each destination and (2) bounded variation among the delays along these paths. We first establish that the problem of determining such a constrained tree is NP-complete. We then present a heuristic that demonstrates good average case behavior in terms of the maximum interdestination delay variation. The heuristic achieves its best performance under conditions typical of multicast scenarios in high speed networks. We also show that it is possible to dynamically reorganize the initial tree in response to changes in the destination set, in a way that is minimally disruptive to the multicast session

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Selected Areas in Communications, IEEE Journal on  (Volume:15 ,  Issue: 3 )