Lightpath setup time optimization in wavelength routed all-optical networks

✍ Scribed by M.S Kumar; P.S Kumar

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 165 KB
• Volume: 24
• Category: Article
• ISSN: 0140-3664
• DOI: 10.1016/s0140-3664(00)00280-2

✦ Synopsis

Wavelength Division Multiplexing (WDM) technology evolved to utilize effectively the enormous bandwidth of optical ®ber. In circuitswitched WDM networks data transfer between a given pair of source and destination nodes takes place by using a lightpath. A lightpath is an optical channel having a single wavelength established between the given pair of nodes by con®guring the Wavelength Routing Switches (WRS) at the intermediate nodes along the path. In a recon®gurable optical wavelength routing switch, the time required to recon®gure the switch is often long when compared to the speed of data passing through the switch. It is necessary to consider the delay introduced by slow switches as it has signi®cant impact on the performance of the network. In this paper, we present a new technique to mitigate the lightpath setup time overheads in Dynamic Lightpath Establishment (DLE) algorithms for the wavelength continuous circuit switched all-optical networks. Simulation studies indicate that the proposed technique signi®cantly reduces the number of recon®gurations required to setup new lightpaths.