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2010

Cost Bounds of Multicast Light-Trees in WDM Networks

9 years 1 months ago
Cost Bounds of Multicast Light-Trees in WDM Networks
The construction of light-trees is one principal subproblem for multicast routing in sparse splitting Wavelength Division Multiplexing (WDM) networks. Due to the light splitting constraint and the absence of wavelength converters, several light-trees may be required to establish a multicast session. However, the computation of optimal multicast light-trees is NP-hard. In this paper, we study the wavelength channel cost (i.e., total cost) of the light-trees built for a multicast session. An equal cost of 1 unit hop-count cost is assumed over all the fiber links in the network. We prove that the total cost of a multicast session is tightly lower limited to K and upper bounded to (1) K(N - K) when K < N 2 ; (2) N2 -1 4 or N2 4 respectively when K N 2 and N is odd or even, where K is the number of destinations in the multicast session and N is the number of nodes in the network. Classical sparse splitting multicast routing algorithms such as Reroute-to-Source and Member-Only [3] also f...
Fen Zhou, Miklós Molnár, Bernard Cou
Added 29 Oct 2010
Updated 29 Oct 2010
Type Conference
Year 2010
Where NETWORKING
Authors Fen Zhou, Miklós Molnár, Bernard Cousin, Chunming Qiao
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