An efficient dynamic distributed optical link establish method in intelligent all-optical networks

Abstract

In this article, an efficient, fast, and dynamic distributed optical link setup method is proposed. Two kinds of novel optical fast link release mechanisms (Ahead and Timeout Release) are presented for an optical-link establishment. They can dramatically reduce the blocking probability. For dynamic routing detection, a new kind of dynamic weighted Dijkstra algorithm (DW-DA) along with dynamic optical link load balancing is described. A variable mutation and crossover rates of a genetic algorithm (VMCR-GA) is used for fast wavelength assignment with two-novel-wavelength assignment rules in a wavelength relationship graph, which can reduce the necessary wavelengths and link establishment time. Through simulation giving the blocking probability and the time for link establishment on several well-known networks, the effectiveness of this method has been verified. The blocking probability of the network can be reduced significantly below that of normal routing and wavelength assignment (RWA). Furthermore, the calculating time for reaching the minimum blocking probability can be reduced dramatically.

Integrated Resources Optimization in Three-layer Dynamic Network

“…. We compare ARDN algorithm with minimizing the number of traffic hops(MinTH) algorithm and dynamic weighted Dijkstra algorithm [6] (DWDA) in WDM network in Figure 2. Figure 3 and Figure 4 show the simulation results of blocking probability of connection requests among three algorithms.…”

“…Although multilayer resources can be joint scheduled, but the algorithm is too complex and the constraints are not reasonable. Now, many literatures are about IP/MPLS over WDM two-layer network [4][5][6][7][8][9][10][11][12][13][14]. In paper [8][9][10][11] ant colony optimization(ACO) is used for routing and can efficiently reduce blocking probability of two layer network.…”

Investigations on combined XPM and FWM effects on optical pulse propagation in dynamic IP traffic over WDM networks

“…Meanwhile the development of optical communication technologies, especially wavelength division multiplexing (WDM) technology, has provided huge bandwidth to meet the bandwidth requirement of IP traffic [1], which leads to the combination of the IP layer and WDM layer, namely, IP over WDM networks. Consequently, many researches have been focusing on the effective integration of these two layers and the administration of IP over WDM networks.…”

“…1 Conceptual architecture of IP over WDM networks classifies the service, and accomplishes forwarding of the IP traffic packet using the label information. The router is responsible for typical traffic-engineering functions including topology construction, traffic grooming, dynamic routing, and wavelength assignment (RWA) [1]. In contrast, OXCs are able to exchange IP traffic packets without dealing with label information because different labels correspond to different wavelengths.…”