In this paper we give short review of actual state of WDM networks and we wanted to give outline of new trends, challenges and futures of WDM networks, mainly in view of optical

The objective of the paper is to describe a hierarchical network architecture based on all-optical Wavelength Division Multiplexed (WDM) networks extended (for longer distances) through Asynchronous Transfer Mode (ATM) networks. The local subnetworks are designed as alloptical WDM networks that require tunable components and a media access protocol. These networks will be designed to efficientl...

Given the ever increasing demand for network bandwidth, and the recent phenomenal advances in optical wavelength division multiplexing (WDM) networking technologies, a major component of the Next Generation Internet will be an Internat protocol (IP)-based optical WDM network. As IP over WDM networking technologies mature, a number of important architectural, management and control issues have s...

In recent years, with the rapid exhaustion of the capacity in wide area networks led by Internet and multimedia applications, demand for high bandwidth has been growing at a very fast pace. Wavelength-division multiplexing (WDM) is a promising technique for utilizing the huge available bandwidth in optical fibers. In this paper, we consider efficient designs of nonblocking WDM permutation switc...

1 Introduction In recent years, the increasing popularity of the Internet leads to a rapidly rising demand for network bandwidth. Optical networks offer much higher bandwidth than traditional networks due to huge bandwidth of fiber. The currently attracted technology to use effectively the bandwidth of optical fiber is wavelength division multiplexing WDM. The optical spectrum of is divided int...

Current optical networks are migrating to wavelength division multiplexing (WDM)-based fiber transport between traditional electronic multiplexers/demultiplexers, routers, and switches. Passive optical add–drop WDM networks have emerged but an optical data network that makes full use of the technologies of dynamic optical routing and switching exists only in experimental test-beds. This paper w...

This paper provides a survey on existing survivability related problems and include the new algorithm based on existing algorithms. Survivability has become an important issue and topical subject in WDM networks. This paper reviewed the literature on survivability against multi-domain or link failures to ensure reliability in WDM networks. Survivability in multi-domain optical networks is very ...

In this paper, we first show that a wavelength division multiplexed (WDM) split crossconnect is strictly, wide-sense, or rearrangeably non-blocking if and only if a corresponding 3-stage Clos network is strictly, wide-sense or rearrangeably non-blocking. This observation implies known results on strictly non-blocking WDM split cross-connects and gives rise to new results on wide-sense and rearr...