Light trees: optical multicasting for improved performance in wavelength routed networks

A generalized framework for analyzing time-space switched optical networks

“…Earlier work on the analysis of optical multicasting concentrate on two main areas: (1) min imizing the number of wavelengths required to support a static traffic demand [40,42] and (2) multicast route selection algorithms that provide efficient utilization of the fiber bandwidth when dynamic setup and tear down of multicast traffic is considered [43,44]. The blocking performance for establishing trees has been studied using link-independence model in [45].…”

“…The benefits of supporting multicast traffic at the WDM layer are discussed in [40]. Various multicast models are introduced in [41] along with models to implement different multicast capable switch architectures.…”

Optimization of wavelength assignment for QoS multicast in WDM networks

“…It was studied in [4] concerning the design of multicast-capable optical switches. In [3], the concept of light-trees was introduced for multicast in WDM networks. The objectives of setting up the light-trees in [3] are to minimize the network-wide hop distance and to minimize the total number of transceivers used in the network.…”

“…In [3], the concept of light-trees was introduced for multicast in WDM networks. The objectives of setting up the light-trees in [3] are to minimize the network-wide hop distance and to minimize the total number of transceivers used in the network. In [11], an asymptotic upper bound on the number of wavelengths needed to support multicast capability was obtained by using some properties of expander graphs.…”

“…Multicast uses a tree structure as the route to transmit messages to multiple destinations. A light-tree concept was proposed in [3] to support multicast in optical networks. A light-tree, as a point to multipoint extension of a lightpath, is a tree in the physical topology and occupies the same wavelength in all fiber links in the tree.…”