ON THE FAULT-TOLERANCE AND SIZE OF WDM OPTICAL NETWORKS

2011 ◽  
Vol 21 (01) ◽  
pp. 3-12
Author(s):  
PIETRO CERES ◽  
RAFFAELE CERES
Keyword(s):  
Optical Networks ◽  
Wavelength Division Multiplexing ◽  
Data Streams ◽  
Fault Tolerant ◽  
Wdm Optical Networks ◽  
Lower And Upper Bounds ◽  
Link Failures ◽  
Wavelength Division ◽  
Multiple Data ◽  
All Optical

In optical networks the approach called wavelength division multiplexing allows multiple data streams to be transmitted concurrently along a single optical link, with different streams assigned separate wavelengths. In this paper we refer to all-optical networks, in which each connection is totally optical except at the terminal nodes. For these networks we determine the minimum possible number of links required to perform a fault tolerant broadcast from any node, in terms of the number of nodes, the number of link failures to tolerate and the number of wavelengths to use. We also give lower and upper bounds on the number of wavelengths required for any broadcast which tolerates a given number of link failures on networks with arbitrary topologies.

Switch Architecture with Wavelength Conversion in Optical Networks

2011 ◽  
Vol 474-476 ◽  
pp. 1479-1482
Author(s):  
Ning Zhang
Keyword(s):  
Optical Networks ◽  
Wavelength Division Multiplexing ◽  
Wavelength Conversion ◽  
Optical Network ◽  
Full Potential ◽  
Wdm Optical Networks ◽  
Wavelength Converter ◽  
Wavelength Division ◽  
Wavelength Reuse ◽  
Network Flexibility

In this paper, we analyze the optical network with wavelength conversion, and discuss the architecture of network with wavelength converter in its node. The optical cross connects technology for wavelength division multiplexing (WDM) is rapidly developing. Wavelength conversion is one of the key techniques for switch WDM optical networks. The wavelength conversion technology can achieve wavelength reuse, decrease wavelength competition, enhance network flexibility and scalability, and simplify network structure and management. The results show that If these cross-connectors feature integrated with wavelength conversion, network will be better able to play the full potential of WDM optical networks.

All-Optical Internet

2009 ◽  
pp. 3519-3543
Author(s):  
Abid Abdelouahab ◽  
Fouad Mohammed Abbou ◽  
Ewe Hong Tat ◽  
Toufik Taibi
Keyword(s):  
Optical Networks ◽  
Wavelength Division Multiplexing ◽  
Network Architecture ◽  
Optical Packet Switching ◽  
Switching Network ◽  
Special Focus ◽  
Wavelength Division ◽  
Optical Internet ◽  
All Optical ◽  
Generation Network

To exploit the unprecedented opportunities offered by the E-Service Applications, businesses and users alike would need a highly-available, reliable, and efficient telecommunication infrastructure. This chapter provides an insight into building the next-generation network infrastructure, that is, the All-Optical Internet. It also reveals the factors driving the convergence of the Internet Protocol (IP) and the Wavelength-Division Multiplexing (WDM) technology. The chapter discusses the dominant optical networks architectures in an attempt to show the evolution towards the ultimate all-optical packet-switching network. A special focus is given to the Optical Burst Switching (OBS) as a new emerging switching paradigm and a highly promising technology. OBS network architecture, burst assembly, signaling and reservation protocols, QoS support, and contention resolution techniques are presented. Furthermore, realistic suggestions and strategies to efficiently deploy OBS are given.

All-Optical Internet

2011 ◽  
pp. 323-349
Author(s):  
Abid Abdelouahab ◽  
Fouad Mohammed Abbou ◽  
Ewe Hong Tat ◽  
Toufik Taibi
Keyword(s):  
Optical Networks ◽  
Wavelength Division Multiplexing ◽  
Network Architecture ◽  
Optical Packet Switching ◽  
Switching Network ◽  
Special Focus ◽  
Wavelength Division ◽  
Optical Internet ◽  
All Optical ◽  
Generation Network

To exploit the unprecedented opportunities offered by the E-Service Applications, businesses and users alike would need a highly-available, reliable, and efficient telecommunication infrastructure. This chapter provides an insight into building the next-generation network infrastructure, that is, the All-Optical Internet. It also reveals the factors driving the convergence of the Internet Protocol (IP) and the Wavelength-Division Multiplexing (WDM) technology. The chapter discusses the dominant optical networks architectures in an attempt to show the evolution towards the ultimate all-optical packet-switching network. A special focus is given to the Optical Burst Switching (OBS) as a new emerging switching paradigm and a highly promising technology. OBS network architecture, burst assembly, signaling and reservation protocols, QoS support, and contention resolution techniques are presented. Furthermore, realistic suggestions and strategies to efficiently deploy OBS are given.

Survivability in Optical Networks

2011 ◽  
pp. 1-26
Author(s):  
Bin Wang
Keyword(s):  
Optical Networks ◽  
Wavelength Division Multiplexing ◽  
Mesh Networks ◽  
Future Internet ◽  
Future Research ◽  
Wdm Optical Networks ◽  
Switched Networks ◽  
Wavelength Division ◽  
Internet Backbone ◽  
Recent Developments

WDM optical networks are widely viewed as the most appropriate choice for the future Internet backbone with the potential to fulfill the ever-growing demands for bandwidth. A failure in a network such as a cable cut may result in a tremendous loss of data. Therefore, network survivability, the ability for a network to continue to provide services in the event of failures, is a very important issue in WDM optical networks. This chapter introduces the principles and state-of-the-art of survivability provisioning in optical networks, in particular, in optical networks that employ wavelength division multiplexing (WDM). Concepts of survivability provisioning in optical networks such as protection and restoration, dedicated versus shared survivability, path-based, link-based, segment-based, cycle-based survivability, and so on, are covered to provide multiple classes of quality of protection against single failure, dual-failure, multiple simultaneous failures, or shared risk link group failures, in WDM mesh networks. Recent developments in survivable service provisioning are summarized, such as survivability provisioning that takes into account the connection holding-time, survivability in WDM light-trail networks and optical burst switched networks. Finally, the chapter briefly examines future research directions.

scholarly journals Performance evaluation and analysis of four waves mixing in DWDM optical communications

2021 ◽  
Author(s):  
Ebrahim E. Elsayed
Keyword(s):  
Optical Networks ◽  
Wavelength Division Multiplexing ◽  
Wavelength Conversion ◽  
Power Level ◽  
Wave Length ◽  
Nonlinear Effects ◽  
Wdm Optical Networks ◽  
Component Reliability ◽  
Wavelength Division ◽  
Dwdm System

Abstract Optical nonlinearities give rise to many ubiquitous effects in optical fibres ’. These effects are interesting in themselves and can be detrimental in optical communication. In the Dense Wave length division multiplexing system (DWDM) the nonlinear effects plays important role .DWDM system offers component reliability, system availability and system margin. DWDM system carries different channels. Hence power level carried by fiber increases which generates nonlinear effect such as SPM, XPM, SRS, SBS and FWM. Four wave mixing (FWM) is one of the most troubling issues. The FWM gives crosstalk in DWDM system whose channel spacing is narrow. Wavelength exchanging enables data swapping between two different wavelengths simultaneously. These phenomena have been used in many applications in Wavelength Division Multiplexing (WDM) optical networks such as, wavelength conversion, wavelength sampling, optical 3R, optical interconnects and optical add-drop multiplexing.

scholarly journals Performance evaluation and analysis of four waves mixing in DWDM optical communications

2021 ◽  
Author(s):  
Ebrahim E. Elsayed
Keyword(s):  
Optical Networks ◽  
Wavelength Division Multiplexing ◽  
Wavelength Conversion ◽  
Power Level ◽  
Wave Length ◽  
Nonlinear Effects ◽  
Wdm Optical Networks ◽  
Component Reliability ◽  
Wavelength Division ◽  
Dwdm System

Abstract Optical nonlinearities give rise to many ubiquitous effects in optical fibres ’. These effects are interesting in themselves and can be detrimental in optical communication. In the Dense Wave length division multiplexing system (DWDM) the nonlinear effects plays important role .DWDM system offers component reliability, system availability and system margin. DWDM system carries different channels. Hence power level carried by fiber increases which generates nonlinear effect such as SPM, XPM, SRS, SBS and FWM. Four wave mixing (FWM) is one of the most troubling issues. The FWM gives crosstalk in DWDM system whose channel spacing is narrow. Wavelength exchanging enables data swapping between two different wavelengths simultaneously. These phenomena have been used in many applications in Wavelength Division Multiplexing (WDM) optical networks such as, wavelength conversion, wavelength sampling, optical 3R, optical interconnects and optical add-drop multiplexing.

All-Optical Internet

2010 ◽  
pp. 2014-2037
Author(s):  
Abid Abdelouahab ◽  
Fouad Mohammed Abbou ◽  
Ewe Hong Tat ◽  
Toufik Taibi
Keyword(s):  
Optical Networks ◽  
Wavelength Division Multiplexing ◽  
Network Architecture ◽  
Optical Packet Switching ◽  
Switching Network ◽  
Special Focus ◽  
Wavelength Division ◽  
Optical Internet ◽  
All Optical ◽  
Generation Network

To exploit the unprecedented opportunities offered by the E-Service Applications, businesses and users alike would need a highly-available, reliable, and efficient telecommunication infrastructure. This chapter provides an insight into building the next-generation network infrastructure, that is, the All-Optical Internet. It also reveals the factors driving the convergence of the Internet Protocol (IP) and the Wavelength-Division Multiplexing (WDM) technology. The chapter discusses the dominant optical networks architectures in an attempt to show the evolution towards the ultimate all-optical packet-switching network. A special focus is given to the Optical Burst Switching (OBS) as a new emerging switching paradigm and a highly promising technology. OBS network architecture, burst assembly, signaling and reservation protocols, QoS support, and contention resolution techniques are presented. Furthermore, realistic suggestions and strategies to efficiently deploy OBS are given.

scholarly journals Performance evaluation and analysis of four waves mixing in DWDM optical communications

2021 ◽  
Author(s):  
Ebrahim E. Elsayed
Keyword(s):  
Optical Networks ◽  
Wavelength Division Multiplexing ◽  
Wavelength Conversion ◽  
Power Level ◽  
Wave Length ◽  
Nonlinear Effects ◽  
Wdm Optical Networks ◽  
Component Reliability ◽  
Wavelength Division ◽  
Dwdm System

Abstract Optical nonlinearities give rise to many ubiquitous effects in optical fibres. These effects are interesting in them and can be detrimental in optical communication. In the Dense Wave length division multiplexing system (DWDM) the nonlinear effects plays important role .DWDM system offers component reliability, system availability and system margin. DWDM system carries different channels. Hence power level carried by fiber increases which generates nonlinear effect such as SPM ,XPM, SRS, SBS and FWM. Four waves mixing (FWM) is one of the most troubling issues. The FWM gives crosstalk in DWDM system whose channel spacing is narrow. Wavelength exchanging enables data swapping between two different wavelengths simultaneously. These phenomena have been used in many applications in Wavelength Division Multiplexing (WDM) optical networks such as, wavelength conversion, wavelength sampling, optical 3R, optical interconnects and optical add-drop multiplexing.

SYMMETRIC COMMUNICATION IN ALL-OPTICAL TREE NETWORKS

2000 ◽  
Vol 10 (04) ◽  
pp. 305-313 ◽  
Author(s):  
IOANNIS CARAGIANNIS ◽  
CHRISTOS KAKLAMANIS ◽  
PINO PERSIANO
Keyword(s):  
Optical Networks ◽  
Wavelength Division Multiplexing ◽  
High Performance ◽  
Optical Network ◽  
Engineering Problem ◽  
Wavelength Division ◽  
All Optical ◽  
Underlying Network ◽  
Special Case ◽  
Optical Bandwidth

We address the problem of allocating optical bandwidth to a set of communication requests in a tree-shaped all-optical network that utilizes Wavelength Division Multiplexing (WDM) technology. WDM technology establishes communication between pairs of nodes of the network by establishing tranceiver–receiver paths and assigning wavelengths to each path so that no two paths going through the same link use the same wavelength. Optical bandwidth is the number of distinct wavelengths. The important engineering problem to be solved is to establish communication between pairs of nodes so that the total number of wavelengths used is minimized. In this paper, we focus on a special case of the problem considering patterns of requests that are symmetric, i.e. for any transmitter–receiver pair of nodes (v1, v2) there also exists its symmetric (v2, v1). Our motivation lies in the fact that many services that are expected to be supported by high performance optical networks in the future, require bidirectional reservation of bandwidth. We prove that the problem of optimizing the number of wavelengths used is NP-hard even when the underlying network is a binary tree. We also present two interesting lower bounds.

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