DocumentCode :
1159119
Title :
On the complexity of virtual topology design for multicasting in WDM trees with tap-and-continue and multicast-capable switches
Author :
Miller, E. ; Libeskind-Hadas, R. ; Barnard, D. ; Chang, W. ; Dresner, K. ; Turner, W.M. ; Hartline, J.R.
Author_Institution :
Dept. of Comput. Sci., Harvey Mudd Coll., Claremont, CA, USA
Volume :
22
Issue :
9
fYear :
2004
Firstpage :
1601
Lastpage :
1612
Abstract :
This paper investigates the problem of finding optimal multicast virtual topologies, with respect to minimizing the maximum hop distance, in wavelength-division multiplexing multicast trees. Although the problem of finding optimal multicast trees is itself known to be NP-complete under many optimization metrics, high-quality approximation algorithms are known for this problem. We investigate the case that a multicast tree has been selected and seek to embed an optimal virtual topology in this multicast tree. We show that the problem can be solved in polynomial time when tap-and-continue switches are employed, which allow a lightpath to be tapped by some number of intermediate nodes. However, the problem becomes NP-complete when fully multicast-capable switches are employed. Our results suggest that tap-and-continue switches can be used to obtain high-quality multicast virtual topologies, while heuristics will be required to find good solutions in fully multicast-capable networks.
Keywords :
multicast communication; optical fibre networks; optical switches; optimisation; telecommunication network topology; wavelength division multiplexing; NP-complete problem; WDM; high-quality approximation algorithm; lightpath; maximum hop distance minimization; multicast-capable switch; optimal multicast virtual topology; tap-continue switch; wavelength-division multiplexing multicast tree; Approximation algorithms; Bandwidth; Computer science; Multicast algorithms; Optical fiber devices; Optical fiber networks; Optical switches; Topology; WDM networks; Wavelength division multiplexing;
fLanguage :
English
Journal_Title :
Selected Areas in Communications, IEEE Journal on
Publisher :
ieee
ISSN :
0733-8716
Type :
jour
DOI :
10.1109/JSAC.2004.833853
Filename :
1355961
Link To Document :
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