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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,...
The success of Generalized Multi-protocol Label Switching (GMPLS) provides a solution that enhances IP by its remarkably advanced features particularly the improvement in data transfer rate. GMPLS can be well classified, managed and policed across different types of networks. In this paper, we discuss the GMPLS and its application for core optical network. The IP and optical layers are converging...
Network load balancing is the ability to aggregate two or more wide area network (WAN) connections in order to achieve greater reliability and overall throughput. This paper discusses traffic technology and flow optimization in optical network. Performance optimization of networks is actually a control problem. Traffic engineering should provide sufficient control in an adaptive feedback control system...
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...
The popularity of the Internet and its related services continues to be one of the main reasons for the explosive growth of traffic volume in global information and telecommunications networks. This trend of data-centric traffic growth, emerging new requirements and the need of network operators to reduce investments and operational costs (capital expenditure and operational expenditure) represent...
With the rapid development of computer network, multimedia technology for e-education is widely applied in everywhere. In this paper, we analyze the multimedia technology, discuss the applications of multimedia technology in e-learning education. Multimedia system offers operators the opportunity to build an open IP based optical network infrastructure that will enable an easy deployment of new rich...
In the optimization of operational networks the most important target is the minimization of congestion. Congestion can be divided into two types, congestion in the case where resources are insufficient to carry all the traffic, and congestion in the case where resources are divided inefficiently so that a part of the network is over-utilized while another part of the network has unused band-width...
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...
In this paper, we propose a new mechanism on multiple connections technology in optical network. Multiple connections technology is a very complicated function of a network and also the one of the most important technologies in optical network. There are two main uses for multiple Internet links connected to the same internal network. One common use is to select an outbound link based on the type...
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,...
The popularity of the Internet and its related services continues to be one of the main reasons for the explosive growth of traffic volume in global information and optical network. This paper presents an analytical approach for studying load and traffic engineering (TE) in optical network. Load balancing is common in optical networks. It is a key component of traffic engineering, link bundling, and...
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...
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...
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...
Focused all the attention on survivability schemes under the high speed, multi-service and integrated multi-domain optical networks (MDON) environment. In this paper, based on the traits which are multi-service and distributed control for optical network, we first analyze the problems and challenges posed by MDON survivability. According to the survivability need of MDON, we classify associated key...
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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