WDM Node Structure with GMPLS Technology in Optical Transport Networks

2011 ◽  
Vol 474-476 ◽  
pp. 1483-1486
Author(s):  
Ning Zhang ◽  
Mao Chang Ge
Keyword(s):  
Complex Networks ◽  
Optical Networks ◽  
Rapid Development ◽  
Optical Network ◽  
Transmission Network ◽  
Network Technology ◽  
Transport Networks ◽  
Label Switching ◽  
Optical Transport Networks ◽  
Multi Protocol Label Switching

With the rapid development of optical network technology, a thing worth noting is the generalized multi-protocol label switching (GMPLS) technology in optical network has been more used, mainly in auto-switching transmission network. GMPLS is an advanced protocol which is essential for managing a diverse and complex networks, GMPLS has caused technical challenges in its deployment in optical networks. In this paper, we analyze the evolution to optical network, and discuss the GMPLS technology and its applications. GMPLS will become the important protocol in future optical network.

Research on CLIB Routing and Spectrum Allocation Algorithm in Elastic Optical Networks

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Li Li ◽  
Zhai Ya-Fang ◽  
Li Hong-Jie
Keyword(s):  
Optical Networks ◽  
Blocking Probability ◽  
Rapid Development ◽  
Optical Network ◽  
Spectrum Allocation ◽  
Mobile Internet ◽  
High Definition ◽  
Allocation Algorithm ◽  
High Bandwidth ◽  
Routing And Spectrum Allocation

AbstractWith the rapid development of mobile Internet, high-definition video and cloud computing, users’ bandwidth demands are not only larger and larger but also more and more diverse. To solve this problem, there searchers put forward the concept of elastic optical network (EON). EON adopts the transmission mode of elastic grid, which can allocate spectrum resources flexibly and meet high bandwidth and diversity requirements at the same time. Routing and spectrum allocation (RSA) is an important issue in EON. In this paper, we present a heuristic algorithm named constrained-lower-indexed-block (CLIB) allocation algorithm for the RSA problem. The algorithm is based on the K candidate paths. When there are available spectrum blocks on multiple candidate paths, if the increase of the path length does not exceed a given threshold, the lower index spectrum would be selected for the connection request on a longer path. The aim of the algorithm is to concentrate the occupied frequency slices on one side of the spectrum and leave another side of the spectrum to the later arrived connection requests as much as possible, to reduce the blocking probability of connection requests. Simulation results show that comparing with the first-last-fit and hybrid grouping algorithms, the CLIB algorithm can reduce the blocking probability of connection requests.

Energy-Efficient Optical Transport Networks with Mixed Regenerator Placement

2013 ◽  
pp. 118-152
Author(s):  
Zuqing Zhu
Keyword(s):  
Network Design ◽  
Optical Networks ◽  
Energy Efficient ◽  
Transport Networks ◽  
Optical Transport Networks ◽  
Network Provisioning ◽  
All Optical ◽  
Translucent Optical Networks ◽  
Optical Regeneration ◽  
Basic Concepts

In this chapter, the authors first discuss the background and basic concepts of all-optical regeneration and translucent optical networks. Since all-optical regenerator is much more energy-efficient than traditional O/E/O ones, they investigate translucent lightpath arrangement that involves mixed placement (MRP) of optical inline amplifiers (1R), all-optical 2R regenerators, and O/E/O 3R regenerators for energy-saving. In order to make sure that the end-to-end transmission performance requirement can still be satisfied with this arrangement, the authors analyze the signal BER evolution through fiber links and different types of regenerators, and propose a theoretical model. They then develop search strategies based on exhaustive search and genetic algorithms, and discuss how to use them to optimize the energy-efficiency of lightpaths using MRP. Finally, the authors move to the network design using MRP, in which they considered both offline network design and online network provisioning.

scholarly journals A 3-CS Distributed Federated Transfer Learning Framework for Intelligent Edge Optical Networks

2021 ◽  
Vol 2 ◽  
Author(s):  
Hui Yang ◽  
Qiuyan Yao ◽  
Bowen Bao ◽  
Chao Li ◽  
Danshi Wang ◽  
...  
Keyword(s):  
Optical Networks ◽  
Transfer Learning ◽  
Network Performance ◽  
Rapid Development ◽  
Optical Network ◽  
Operation Efficiency ◽  
Cross Spectrum ◽  
Distributed Intelligence ◽  
Learning Framework ◽  
Intelligent Approach

With the rapid development of optical network and edge computing, the operation efficiency of the edge optical network has become more and more important, requiring an intelligent approach to enhance the network performance. To enhance the intelligence of the edge optical network, this article firstly provides the demand for the development of edge optical networks. Then, a cross-scene, cross-spectrum, and cross-service (3-CS) architecture for edge optical networks is presented. Finally, a federated transfer learning (FTL) framework, realizing a distributed intelligence edge optical network, is proposed. The usability of the proposed framework is verified by simulation.

scholarly journals Connection setup and traffic aggregation in IP-based Elastic Optical Networks (EON)

2020 ◽  
Vol 14 ◽  
Keyword(s):  
Optical Networks ◽  
Network Structure ◽  
Research Work ◽  
The Internet ◽  
Potential Candidate ◽  
Transport Networks ◽  
Optical Transport Networks ◽  
Optical Wavelength ◽  
Traffic Scenario ◽  
Multilayer Routing

To overcome the challenges of the increased IP traffic volume on the Internet, the IP/MPLS-based fixed grid DWDM network structure was proposed, which makes the interaction between both the IP layer and the optical wavelength routed fixed DWDM layer applicable. However, the deployment of this architecture was not only expensive, but power-consuming. The emerging optical Flexgrid networks technology is nowadays suggested to be the potential candidate for future optical transport networks. This is because it provides extremely flexible and spectrally effective resources utilisation. Therefore, it has attracted the attention of network operators, optical networks equipment manufacturers and the wider research and development society. In this research work, we propose a novel multilayer routing scheme for an IP/MPLS-based optical Flex-grid network, which is based on the protocol suite defined by the GMPLS architecture. Furthermore, we evaluate its behaviour in an online dynamic traffic scenario.

scholarly journals POL-MUX System for Noncoherent Optical Networks

2021 ◽  
Vol 11 (12) ◽  
pp. 5582
Author(s):  
Radim Sifta ◽  
Michal Latal ◽  
Petr Munster ◽  
Tomas Horvath
Keyword(s):  
Signal Processing ◽  
Optical Networks ◽  
High Speed ◽  
Wavelength Division Multiplex ◽  
Digital Signal ◽  
Coherent Detection ◽  
Dynamic Polarization ◽  
Transport Networks ◽  
Optical Transport Networks ◽  
Wavelength Division

This paper is focused on applying a polarization multiplex to passive optical networks to double their transmission bandwidth without significant changes in the distribution network. Although polarization multiplexes are already employed for high-speed optical transport networks with digital signal processing and coherent detection, we propose a system that could be used in existing older optical networks using a dynamic polarization controller in combination with a wavelength division multiplex.

Survivability Mechanisms of Generalized Multiprotocol Label Switching

2008 ◽  
pp. 593-599
Author(s):  
M. C.R. Medeiros ◽  
N. S.C. Correia
Keyword(s):  
Optical Networks ◽  
Task Force ◽  
Optical Network ◽  
The Internet ◽  
Multiprotocol Label Switching ◽  
Core Network ◽  
Label Switching ◽  
Optical Wavelength ◽  
Generalized Multiprotocol Label Switching ◽  
Ip Routers

Internet protocol (IP) over optical (IP-over-optical) networks is the widely accepted solution to meet the ever increasing demands of IP traffic. In an IP-over-optical network, the IP routers are attached to an optical core network, composed by optical cross-connects (OXC) that are interconnected by dynamically established optical wavelength channels called lighpaths (Rajagopalan, Pendarakis, Saha, Ramamoorthy, & Bala, 2000). To control such lightpaths in a dynamic, efficient, and realtime manner, generalized multiprotocol label switching (GMPLS) based control plane has been proposed by the Internet engineering task force (IETF) in the RFC 3945 edited by Mannie (2003).

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