A randomized algorithm for finding a path subject to multiple QoS requirements
An important aspect of quality-of-service (QoS) provisioning in integrated networks is the ability to find a feasible route that satisfies a set of end-to-end QoS requirements (or constraints) while efficiently using network resources. In general, finding a path subject to multiple additive constrai...
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Published in | Computer networks (Amsterdam, Netherlands : 1999) Vol. 36; no. 2; pp. 251 - 268 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
Amsterdam
Elsevier B.V
01.07.2001
Elsevier Sequoia S.A |
Subjects | |
Online Access | Get full text |
ISSN | 1389-1286 1872-7069 |
DOI | 10.1016/S1389-1286(00)00209-7 |
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Abstract | An important aspect of quality-of-service (QoS) provisioning in integrated networks is the ability to find a
feasible route that satisfies a set of end-to-end QoS requirements (or constraints) while efficiently using network resources. In general, finding a path subject to multiple
additive constraints (e.g., delay, delay-jitter) is an NP-complete problem. We propose an efficient randomized heuristic algorithm to this problem. Although the algorithm is presented as a centralized one, the idea behind it can also be implemented in a distributed manner. Our algorithm initially computes the cost of the best path from each node to a given destination with respect to individual link weights and their linear combination. In this initialization step, Reverse–Dijkstra's algorithm is used
K+1 times per path request, where
K is the number of additive constraints. The algorithm then randomly traverses the graph, discovering nodes from which there is a good chance of reaching the final destination. This randomized search is a modification of the breadth-first search (BFS). Using extensive simulations, we show that the proposed algorithm provides better performance than existing algorithms under the same order of computational complexity. |
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AbstractList | An important aspect of quality-of-service (QoS) provisioning in integrated networks is the ability to find a
feasible route that satisfies a set of end-to-end QoS requirements (or constraints) while efficiently using network resources. In general, finding a path subject to multiple
additive constraints (e.g., delay, delay-jitter) is an NP-complete problem. We propose an efficient randomized heuristic algorithm to this problem. Although the algorithm is presented as a centralized one, the idea behind it can also be implemented in a distributed manner. Our algorithm initially computes the cost of the best path from each node to a given destination with respect to individual link weights and their linear combination. In this initialization step, Reverse–Dijkstra's algorithm is used
K+1 times per path request, where
K is the number of additive constraints. The algorithm then randomly traverses the graph, discovering nodes from which there is a good chance of reaching the final destination. This randomized search is a modification of the breadth-first search (BFS). Using extensive simulations, we show that the proposed algorithm provides better performance than existing algorithms under the same order of computational complexity. An important aspect of quality-of-service (QoS) provisioning in integrated networks is the ability to find a feasible route that satisfies a set of end-to-end QoS requirements (or constraints) while efficiently using network resources. In general, finding a path subject to multiple additive constraints (e.g., delay, delay-jitter) is an NP-complete problem. We propose an efficient randomized heuristic algorithm to this problem. Although the algorithm is presented as a centralized one, the idea behind it can also be implemented in a distributed manner. Our algorithm initially computes the cost of the best path from each node to a given destination with respect to individual link weights and their linear combination. In this initialization step, Reverse-Dijkstra's algorithm is used K + 1 times per path request, where K is the number of additive constraints. The algorithm then randomly traverses the graph, discovering nodes from which there is a good chance of reaching the final destination. This randomized search is a modification of the breadth-first search (BFS). Using extensive simulations, we show that the proposed algorithm provides better performance than existing algorithms under the same order of computational complexity. copyright 2001 Elsevier Science B.V. Article included in a special issue devoted to the theme: Overlay networks. An important aspect of quality-of-service (QoS) provisioning in integrated networks is the ability to find a feasible route that satisfies a set of end-to-end QoS requirements (or constraints) while efficiently using network resources. In general, finding a path subject to multiple additive constraints, such as delay and delay-jitter, is an NP-complete problem. Proposes an efficient randomized heuristic algorithm to this problem. Although the algorithm is presented as a centralized one, the idea behind it can also be implemented in a distributed manner. The algorithm initially computes the cost of the best path from each node to a given destination with respect to individual link weights and their linear combination. Using extensive simulations, it is shown that the proposed algorithm provides better performance than existing algorithms under the same order of computational complexity. (Original abstract - amended) An important aspect of quality-of-service (QoS) provisioning in integrated networks is the ability to find a feasible route that satisfies a set of end-to-end QoS requirements (or constraints) while efficiently using network resources. In general, finding a path subject to multiple additive constraints (e.g., delay, delay-jitter) is an NP-complete problem. An efficient randomized heuristic algorithm to this problem is proposed. Although the algorithm is presented as a centralized one, the idea behind it can also be implemented in a distributed manner. This algorithm initially computes the cost of the best path from each node to a given destination with respect to individual link weights and their linear combination. Using extensive simulations, it is shown that the proposed algorithm provides better performance than existing algorithms under the same order of computational complexity. |
Author | Krunz, Marwan Korkmaz, Turgay |
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article-title: Approximation schemes for the restricted shortest path problem publication-title: Mathematics of Operations Research doi: 10.1287/moor.17.1.36 |
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Snippet | An important aspect of quality-of-service (QoS) provisioning in integrated networks is the ability to find a
feasible route that satisfies a set of end-to-end... An important aspect of quality-of-service (QoS) provisioning in integrated networks is the ability to find a feasible route that satisfies a set of end-to-end... Article included in a special issue devoted to the theme: Overlay networks. An important aspect of quality-of-service (QoS) provisioning in integrated networks... |
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SubjectTerms | Algorithms Multi-constrained path selection Networks QoS-based routing Quality of service Routing Scalable routing Selection Studies |
Title | A randomized algorithm for finding a path subject to multiple QoS requirements |
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