The maximum traffic load that can be supported by a wavelength division multiplexed (WDM) optical burst switched (OBS) network with dynamic wavelength allocation is studied. It is shown that it depends on the requirements of the class of service and on the efficiency of the dynamic routing and wavelength assignment (RWA) algorithm employed. Two methods to build the bursts are presented as well ...

Several regular topologies have been proposed to be used as the logical topology for WDM networks. These topologies are usually evaluated and compared based on the metrics related to network performance. It can be simply shown that this is generally not sufficient since better network performance can be achieved by increasing more network facilities. However, doing this eventually increases the...

This is a tutorial paper on the traffic grooming optimization in mesh Wavelength Division Multiplexing (WDM) networks for static traffic patterns. The traffic grooming technique provides a two-layer traffic engineering capability by aggregating and routing low-bandwidth traffic flows from the upper layer over re-configurable highbandwidth connections in the lower layer. This paper demonstrates ...

Motivated by the increasing importance of multifiber WDM networks we study two routing and wavelength assignment problems in such networks: – Fiber Cost Minimization: the number of wavelengths per fiber is given and we want to minimize the cost of fiber links that need to be reserved in order to satisfy a set of communication requests; we introduce a generalized setting where network pricing is...

This paper considers the problem of Routing and Wavelength Assignment (RWA) in optical passive star networks with non-uniform traffic load. The problem can be considered as designing a logical topology over an optical passive star physical topology with a given non-uniform traffic. The approach uses the bipartite graphs and the concept of Time and Wavelength Division Multiplexing (TWDM) embeddi...

Abstract-A new class of quality of service (QoS) measures, EB(p), p≥1 for WDM optical transport networks is proposed in this paper. Compared with the traditional overall average blocking probability (OABP), EB(p) is a composite measure that is unbiased, makes reference to the QOS requirements, onesided, and takes the potential revenue loss into consideration. In particular, EB(1) can be identif...

Most routing and wavelength assignment (RWA) algorithms for all-optical networks do not consider the potential problem of wavelength reservation confliction, which can happen even if the network is only lightly loaded. In this paper, we propose a new reservation protocol MBR (Markov-based backward reservation) based on Markov modeling of the optical links. Our simulations show that this new pro...

The problem of routing and wavelength assignment (RWA) is critically important for increasing the efficiency of wavelength-routed all-optical networks. Given the physical network structure and the required connections, the RWA problem is to select a suitable path and wavelength among the many possible choices for each connection so that no two paths sharing a link are assigned the same waveleng...

This paper addresses the problem of routing and wavelength assignment (RWA) of static lightpath requests in wavelength routed optical networks. The objective is to minimize the number of wavelengths used. This problem has been shown to be NP-complete and several heuristic algorithms have been developed to solve it. We suggest very efficient, yet simple, heuristic algorithms for the RWA problem ...

In all-optical networks, signals are propagated through switches with no electrical regeneration. The switches used in all-optical networks are prone to signal leaking; due to the absence of electrical regeneration, these leaked signals, called crosstalk signals, may therefore propagate through hundreds to several thousands of kilometers. Crosstalk may be enhanced by fiber nonlinearities during...