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http://dx.doi.org/10.3745/KIPSTC.2005.12C.1.105

Efficient Multicast Tree Algorithm for Acceptable Delay and Minimum Delay Variation  

Kim Moon-Seong (성균관대학교 대학원 정보통신공학부)
Choo Hyun-Seung (성균관대학교 정보통신공학부)
Lee Young-Ro (한국전산원 BcN기획팀)
Abstract
With the proliferation of multimedia group applications, the construction of multicast trees satisfying QoS requirements is becoming a problem of prime importance. In this paper, we study the delay- and delay variation-bounded multicast tree (DVBMT) problem which is NP-complete. The problem is to construct a spanning tree for destination node, which has the minimized multicast delay variation, and the delay on the path from the source to each destination is bounded. A solution to this problem is required to provide decent real-time communication services such as on-line games, shopping, and teleconferencing. Performance comparison shows that the proposed scheme outperforms DDVCA which is known to be effective so far in any network topology. The enhancement is up to about $3.6{\%}{\~}11.1{\%}$ in terms of normalized surcharge for DUVCA. The time complexity of our algorithm is $O(mn^2)$.
Keywords
delay- and delay variation-bounded multicast tree Problem; delay variation; DDVCA(Delay and Delay Variation Constraint Algorithm);
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