scholarly journals Optical Network Models and Their Application to Software-Defined Network Management

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Thomas Szyrkowiec ◽  
Achim Autenrieth ◽  
Wolfgang Kellerer
Keyword(s):  
Network Management ◽  
Optical Networks ◽  
Optical Transmission ◽  
Optical Network ◽  
Network Models ◽  
Software Defined Networking ◽  
Software Defined Network ◽  
Optical Networking ◽  
Model Ecosystem ◽  
Fundamental Component

Software-defined networking is finding its way into optical networks. Here, it promises a simplification and unification of network management for optical networks allowing automation of operational tasks despite the highly diverse and vendor-specific commercial systems and the complexity and analog nature of optical transmission. Common abstractions and interfaces are a fundamental component for software-defined optical networking. Currently, a number of models for optical networks are available. They all claim to provide open and vendor agnostic management of optical equipment. In this work, we survey and compare the most important models and propose an intent interface for creating virtual topologies which is integrated in the existing model ecosystem.

scholarly journals Scalable OneM2M IoT Open-Source Platform Evaluated in an SDN Optical Network Controller Scenario

Sensors ◽  
2022 ◽  
Vol 22 (2) ◽  
pp. 431
Author(s):  
Martina Troscia ◽  
Andrea Sgambelluri ◽  
Francesco Paolucci ◽  
Piero Castoldi ◽  
Paolo Pagano ◽  
...  
Keyword(s):  
Open Source ◽  
Optical Networks ◽  
Optical Network ◽  
Software Defined Networking ◽  
Production Network ◽  
Adequate Level ◽  
Network Controller ◽  
Iot Devices ◽  
Control Application ◽  
The Way

Software Defined Networking represents a mature technology for the control of optical networks, though all open controller implementations present in the literature still lack the adequate level of maturity and completeness to be considered for (pre)-production network deployments. This work aims at experimenting on, assessing and discussing the use of the OneM2M open-source platform in the context of optical networks. Network elements and devices are implemented as IoT devices, and the control application is built on top of an OneM2M-compliant server. The work concretely addresses the scalability and flexibility performances of the proposed solution, accounting for the expected growth of optical networks. The two experiment scenarios show promising results and confirm that the OneM2M platform can be adopted in such a context, paving the way to other researches and studies.

Toward flexible optical networks with Transport-SDN

2015 ◽  
Vol 57 (5) ◽  
Author(s):  
Thomas Szyrkowiec ◽  
Achim Autenrieth ◽  
Jörg-Peter Elbers
Keyword(s):  
Optical Networks ◽  
Recent Progress ◽  
Network Virtualization ◽  
Software Defined Networking ◽  
Optical Networking ◽  
Bandwidth Control ◽  
Optical Layer ◽  
Dynamic Bandwidth ◽  
Open Issues

AbstractSoftware-Defined Networking and network virtualization are current topics in networks research. An increased flexibility on the optical layer and demands for more dynamic bandwidth control make them candidates to transform optical networking as well. This paper reviews the general concepts, recent progress and open issues toward SDN controlled flexible optical networks.

scholarly journals Cost Benefit Analysis of Elastic and Mixed Line Rate Optical Network Models

2021 ◽  
Author(s):  
Reinhardt Rading
Keyword(s):  
Optical Networks ◽  
Cost Benefit Analysis ◽  
Optical Network ◽  
Cost Benefit ◽  
Network Models ◽  
Single Type ◽  
Bit Rate ◽  
Low Bit Rate ◽  
Mixed Line ◽  
Mixed Line Rate

<div>Network traffic continues to grow at more than 30 percent per year and we either have to install new optical infrastructures or upgrade our optical networks to meet the increasing demands. Installing new fibers seems very costly the network operators considering the heterogeneity of optical networks with some consumers requiring low bit rate and others requiring high bit rate demands. As an alternative, we can use the existing fiber infrastructure to meet the traffic demands by aggregating both high and low bit rate demands or using a single type of rate-tunable technology to handle the increasing demands. This paper analyzes the two planning strategies-all period planning and incremental planning- for allocating resources in an increasing traffic and shows the pros and cons that a network operator may experience in case of using either elastic or mixed line rate optical networks.</div>

scholarly journals Physical Encoding in Optical Layer Security

2012 ◽  
Author(s):  
Zhenxing Wang ◽  
Mable P. Fok ◽  
Paul R. Prucnal
Keyword(s):  
Optical Networks ◽  
Data Security ◽  
Optical Transmission ◽  
Optical Network ◽  
Network Capacity ◽  
Research Attention ◽  
Optical Signals ◽  
Considerable Research ◽  
Optical Layer ◽  
The Impact

Data security at the physical layer of optical networks, or optical layer security, has received considerable research attention due to the rapid growth of optical network capacity [1]. Among various optical layer approaches, optical codedivision multiple access (OCDMA) systems are considered to be promising because of the physical encoding and decoding processes comprising these systems. Generally, physical encoding is an important concept in the field of optical layer security, which implements encoding to the transmitted optical signals, and protects the transmitted data from attack. In this paper, we provide an overview of various OCDMA systems, and discuss the impact of different physical encoding methods on OCDMA systems, in terms of security assurance. Furthermore, we introduce the application of physical encoding to optical steganography and optical transmission with wireless CDMA for security improvement.

scholarly journals Software Defined Networking Based Optical Network: A review

2020 ◽  
Vol 9 (2) ◽  
pp. 139
Author(s):  
Firas M. Mustafa
Keyword(s):  
Optical Networks ◽  
Traffic Engineering ◽  
Optical Network ◽  
Large Data ◽  
Software Defined Networking ◽  
Network Systems ◽  
Research Papers ◽  
Network Equipment ◽  
Power Operation ◽  
Control And Management

In the field of networking, software-defined networking (SDN) has obtained a lot of concentration from both academic and industry, and it aims to provide a flexible and programmable level of control, beside obtain efficient control and management of network systems. For such reasons, the software-defined networks (SDN) can be deemed as an essential task to accomplish these requirements. In the datacenters and networks, the SDN is used to allow the administrators of the networks to start programming, controlling, changing, and managing dynamically the network behavior with open interfaces and a reflection of lower-level functionality because the need for SDN-like switching technology has become evident for many users of network equipment, especially in large data centers. There are many algorithms and applications that have been considered in SDN such as (FP-MA), EON, (EQUAL-APP) (VONCR-APP), and (T-SDN) as use cases for approval purposes because the SDN provides several focal points to the power, operation, and administration of extensive range networks. This paper aims to review Optical Network using SDN, where many types of research papers are present techniques to improve near-optimal traffic engineering and management; measurement and monitoring of the significant parameters of the optical networks and manage the cross-layer issues such as debugging and testing.

scholarly journals An Overview of Optical Network Bandwidth and Fault Management

2010 ◽  
Vol 7 (1) ◽  
pp. 47-69
Author(s):  
J.A. Zubairi
Keyword(s):  
Fault Detection ◽  
Network Management ◽  
Optical Networks ◽  
High Speed ◽  
Optical Network ◽  
Hybrid Approach ◽  
Fault Management ◽  
Network Bandwidth ◽  
Rapid Restoration ◽  
Optical Network Management

This paper discusses the optical network management issues and identifies potential areas for focused research. A general outline of the main components in optical network management is given and specific problems in GMPLS based model are explained. Later, protection and restoration issues are discussed in the broader context of fault management and the tools developed for fault detection are listed. Optical networks need efficient and reliable protection schemes that restore the communications quickly on the occurrence of faults without causing failure of real-time applications using the network. A holistic approach is required that provides mechanisms for fault detection, rapid restoration and reversion in case of fault resolution. Since the role of SDH/SONET is diminishing, the modern optical networks are poised towards the IP-centric model where high performance IP-MPLS routers manage a core intelligent network of IP over WDM. Fault management schemes are developed for both the IP layer and the WDM layer. Faults can be detected and repaired locally and also through centralized network controller. A hybrid approach works best in detecting the faults where the domain controller verifies the established LSPs in addition to the link tests at the node level. On detecting a fault, rapid restoration can perform localized routing of traffic away from the affected port and link. The traffic may be directed to pre-assigned backup paths that are established as shared or dedicated resources. We examine the protection issues in detail including the choice of layer for protection, implementing protection or restoration, backup path routing, backup resource efficiency, subpath protection, QoS traffic survival and multilayer protection triggers and alarm propagation. The complete protection cycle is described and mechanisms incorporated into RSVP-TE and other protocols for detecting and recording path errors are outlined. In addition, MPLS testbed configuration procedure is outlined with suggested topologies. Open issues in this area are identified and current work is highlighted. It is expected that this paper will serve as a catalyst to accelerate the research and development activities in high speed networking.

scholarly journals Investigation of dynamic routing and spectrum allocation methods in elastic optical networks

2017 ◽  
Vol 63 (1) ◽  
pp. 85-92 ◽  
Author(s):  
Edyta Biernacka ◽  
Jerzy Domżał ◽  
Robert Wójcik
Keyword(s):  
Optical Networks ◽  
Shortest Path ◽  
Optical Transmission ◽  
Optical Network ◽  
Simulation Software ◽  
Spectrum Allocation ◽  
Elastic Optical Network ◽  
Modulation Techniques ◽  
Routing And Spectrum Allocation ◽  
Allocation Methods

Abstract The introduction of flexible frequency grids and advanced modulation techniques to optical transmission, namely an elastic optical network, requires new routing and spectrum allocation techniques. In this paper, we investigate dynamic two-step routing and spectrum allocation (RSA) methods for elastic optical networks. K-shortest path-based methods as well as spectrum allocation methods are analysed and discussed. Experimental verification of the investigated techniques is provided using simulation software. Simulation results present effectiveness of routing and spectrum allocation methods for analyzed networks using requested bandwidth of connections. Moreover, performance of shortest path first methods improves considerably when a number of candidate paths increases in the UBN24 topology.

scholarly journals Cost Benefit Analysis of Elastic and Mixed Line Rate Optical Network Models

2021 ◽  
Author(s):  
Reinhardt Rading
Keyword(s):  
Optical Networks ◽  
Cost Benefit Analysis ◽  
Optical Network ◽  
Cost Benefit ◽  
Network Models ◽  
Single Type ◽  
Bit Rate ◽  
Low Bit Rate ◽  
Mixed Line ◽  
Mixed Line Rate

<div>Network traffic continues to grow at more than 30 percent per year and we either have to install new optical infrastructures or upgrade our optical networks to meet the increasing demands. Installing new fibers seems very costly the network operators considering the heterogeneity of optical networks with some consumers requiring low bit rate and others requiring high bit rate demands. As an alternative, we can use the existing fiber infrastructure to meet the traffic demands by aggregating both high and low bit rate demands or using a single type of rate-tunable technology to handle the increasing demands. This paper analyzes the two planning strategies-all period planning and incremental planning- for allocating resources in an increasing traffic and shows the pros and cons that a network operator may experience in case of using either elastic or mixed line rate optical networks.</div>

Control and Operation to Hybrid Optical Network

2011 ◽  
Vol 186 ◽  
pp. 576-580
Author(s):  
Ning Zhang
Keyword(s):  
Optical Networks ◽  
Wavelength Division Multiplexing ◽  
Traffic Management ◽  
Optical Network ◽  
Network Models ◽  
Optical Switches ◽  
Telecommunication Networks ◽  
Data Traffic ◽  
Wavelength Division ◽  
Network Load

In this paper, a novel hybrid optical network system is presented. The continuing increase of data traffic keeps the pressure on the backbone telecommunication networks requiring more diverse and more intelligent allocation of capacity. Optical networking has become a key technology in accommodating the rapidly expanding Internet traffic. Hybrid nodes are now playing a key role in optical networks by facilitating efficient traffic management. New optical networks are expected to support the increasing network load by employing both sophisticated transmission (wavelength division multiplexing division (WDM)) and switching technologies (optical switches and cross-connects). This study will explain how the hybrid nodes achieve with different network models and make it operation through innovative technical designs.

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