Optimum multicast of multimedia streams

Optimum multicast of multimedia streams

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Article ID: iaor20001577
Country: United Kingdom
Volume: 26
Issue: 5
Start Page Number: 461
End Page Number: 480
Publication Date: Apr 1999
Journal: Computers and Operations Research
Authors: , ,
Keywords: communication, programming: branch and bound, heuristics
Abstract:

In a VOD system, multicast is a preferred method for saving network bandwidth, That is, customers requesting the same video program over a small time interval can be arranged in a multicast tree (group), and then the video server sends a video stream via this tree to customers. In this research, we considered how to arrange a set of multicast trees such that the number of customers served is maximized and the link capacity constraint is maintained. For a directed acyclic graph, we proposed a branch-and-bound algorithm to solve this problem and the solution method is illustrated by example. Next, we extended the algorithm to find an approximate solution for a general graph case. It is shown, through simulations on randomly generated graphs that the solution for our approximation method is very close to the optimal solution.

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