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Content Provider | IEEE Xplore Digital Library |
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Author | Matta, Ibrahim Guo, Liang |
Copyright Year | 2011 |
Abstract | Many distributed real-time applications, such as audio-and video-conferencing and collaborative systems, require multicast support from the underlying network. Multicasting involves the delivery of messages over a tree rooted at the sender and whose paths lead to the various receivers. A major objective of the routing protocol is to build a tree with minimum cost. Finding such a tree is known to be computationally expensive, and many heuristics have been proposed to efficiently find near-optimal trees. Moreover, some heuristics exist to efficiently find multicast trees that are of low cost and satisfy Quality-of-Service (QoS) (e.g., delay) delivery constraints required by real-time applications. However, these heuristics are not fast enough for large-scale networks. In this paper, we present a fast algorithm, called QDMR, for generating delay-constrained low-cost multicast routing trees. A salient feature of QDMR is that it dynamically adjusts its low-cost tree construction policy based on how far the current on-tree node is from violating the QoS delay bound. This QoS dependent (adaptive) tree construction, together with the capability of merging least-delay paths into the low-cost tree in case of stringent delay requirements, lead to the following properties: 1) QDMR guarantees that a feasible multicast tree (that satisfies the requested delay) will be found if such tree exists; 2) this delay-bounded multicast tree is very rapidly generated; and 3) the tree has low cost. Through analysis and extensive simulations, we confirm the premise of QDMR by comparing it to many existing multicast algorithms. |
Starting Page | 168 |
Ending Page | 176 |
Page Count | 9 |
File Size | 295933 |
File Format | |
ISSN | 12292370 |
Volume Number | 2 |
Issue Number | 2 |
Language | English |
Publisher | Editorial Department of Journal of Communications and Networks |
Publisher Date | 2000-06-01 |
Publisher Place | South Korea |
Access Restriction | Subscribed |
Rights Holder | JCN |
Subject Keyword | Delays Quality of service Merging Routing Steiner trees Time complexity Cost function simulation Quality-of-service networks real-time multicast routing constrained path optimization |
Content Type | Text |
Resource Type | Article |
Subject | Computer Networks and Communications Information Systems |
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