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In this article, an efficient heuristic approach for routing and wavelength-selective(RWS) in wavelength-division multiplexing (WDM) optical networks is proposed. The high bandwidth of fiber-optic links is utilized through the WDM technology which supports the propagation of multiple laser beams through a single fiber-optic link provided that each laser beam uses a distinct optical wavelength. Thus,...
In WDM network, the load balance problem has received much attention in parallel and distributed applications because good solutions are critical to achieving speedups. This paper discusses traffic technology and load balancing in optical networks. In WDM network, enhancing the performance of an operational network, at both the traffic and the resource levels, are major objectives of traffic engineering...
In this paper, we discuss the routing technology, and analyze the switching technology in optical communication network. WDM optical systems provide orders of magnitude increases in the bandwidth that can be delivered over an existing fiber plant, and enable a significant time-to-market improvement in service delivery, compared to the alternative of laying additional fiber to provide more bandwidth...
Protection is a very important problem in optical network. With the rapid development of WDM optical network, protection technology is paid more and more attentions. In this paper, we analyze the protection principle of WDM optical network, propose a protection method for optical network. We study several conventional protection mechanisms, and compare their performance with the proposed mechanism.
Routing is simultaneously the most complicated function of a network and the most important problem for network. In this paper, based on current crank-back mechanism, a new mechanism of crank-back based on re-routing in crank-back node is proposed. Optical networks are high-capacity telecommunications networks based on optical technologies and component that provide routing, grooming, and restoration...
Routing is simultaneously the most complicated function of a network and the most important in optical network. In this paper, we propose a new mechanism on re-routing in optical network. We make extensive experiments based on this re-routing model, in order to find out the influence of different re-routing parameters, such as the metric chosen or the frequency of crank-back. Through the simulation...
Wavelength-division multiplexing (WDM) is the best technology currently available to handle the rapidly increasing demand for bandwidth in fiber-optical telecommunications networks. This paper analyzes WDM transport network and discusses GMPLS technology for WDM network. Today, WDM optical transport networks have become more complex over the years and have extended into the metropolitan areas closer...
In recent years, IP over WDM has become a key technology of choice for meeting the tremendous bandwidth demand in the optical infrastructure. Survivability is an emerging discipline that blends optical network security with business risk management for the purpose of protecting highly distributed information services and assets. No system is totally immune to attacks, accidents, or failures. Therefore,...
This paper proposes a new approach for wavelength-routed optical network with GMPLS technology in WDM networks. Wavelength-routed optical network is utilized through the wavelength-division multiplexing (WDM) technology which supports the propagation of multiple laser beams through a single fiber-optic link provided that each laser beam uses a distinct optical wavelength. Multi-protocol label switch...
In recent years, there have been dramatic changes in the character of security problems, in their technical and business contexts, and in the goals and purposes of their stakeholders. As a consequence, many of the assumptions underlying traditional security technologies are no longer valid. Failure to recognize the depth and breadth of these changes in combination prevents effective solutions to modern...
Generalized multi-protocol label switching (GMPLS) is being developed by the IETF as the industry standard for transport network control planes. GMPLS defines IP based control of optical resources. Routers are expected to deliver advanced services at higher throughput while handling large amounts of label switching path (LSP) creation/deletion, traffic engineering link information exchange, and link...
In recent years, with the information increasing rapidly, WDM communication network traffic is paid more and more attentions. Traffic engineering (TE) is an interesting application in IP-based networks. TE main objective is to optimize the performance of a network through an efficient utilization of network resources. This paper discusses traffic technology and load balancing in optical networks....
Protection and survivability are very important problems in optical network. With the rapid development of WDM optical network, protection technology is paid more and more attentions. In this paper, we analyze the protection principle of WDM optical network, propose a protection method for optical network. Protection schemes can be divided into link protection, path protection, and partial path protection...
Optical systems nowadays provide the basis for cost-effective transmission of large amounts of bandwidth over the Internet, and will enable its future growth and the spreading of new applications and services. WDM wavelength multiplexing technology is the newest technology which minimizes the costs. WDM generates multiple "virtual fibers" in the current fiber cable infrastructures and makes...
The huge demand for communication network has tend to make topologies of optical networks based on wavelength division multiplexing (WDM) complex. This article proposes a new approach for optical communication network with GMPLS technology in WDM networks. GMPLS grew out of vanilla MPLS, a packet-switching technology designed to improve the efficiency of data networks. A flavor of MPLS, known as MPLS-TE,...
This paper proposes a protection scheme for the WDM network. The emergence of WDM technology has provided an unprecedented opportunity to dramatically increase the bandwidth capacity of telecommunications networks. In protection schemes, there are spare resources reserved for each protected part while those resources are not used under normal conditions. So restoration usually has better resource...
Traffic engineering (TE) is an interesting application in IP-based networks. TE main objective is to optimize the performance of a network through an efficient utilization of network resources. We study a load balancing in optical networks based on measured link loads. As a result, WDM has become a technology of choice for meeting the tremendous bandwidth demand in the communications infrastructure...
Today wavelength division multiplexing (WDM) technology, optical amplifiers, and simple optical switching elements like optical add-drop multiplexers (OADMs) are used in the backbone networks of all operators worldwide. The optical network has its own distinct routing features, topology aggregation and abstraction used in inter-domain routing make the view of network topology different to each routing...
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