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Wavelength Management in WDM Rings to Maximize the Number of Connections

Ioannis Caragiannis
2009 SIAM Journal on Discrete Mathematics  
We study computationally hard combinatorial problems arising from the important engineering question of how to maximize the number of connections that can be simultaneously served in a WDM optical network  ...  In such networks, WDM technology can satisfy a set of connections by computing a route and assigning a wavelength to each connection so that no two connections routed through the same fiber are assigned  ...  Combinatorial problems of interest are those which aim either to minimize the number of wavelengths (intuitively, we may think of the wavelengths as colors) for a set of connections or to maximize the  ... 
doi:10.1137/06067660x fatcat:mcvnozzfxrcv3a6bjyr23iuiaa

Wavelength Management in WDM Rings to Maximize the Number of Connections [chapter]

Ioannis Caragiannis
STACS 2007  
We study computationally hard combinatorial problems arising from the important engineering question of how to maximize the number of connections that can be simultaneously served in a WDM optical network  ...  In such networks, WDM technology can satisfy a set of connections by computing a route and assigning a wavelength to each connection so that no two connections routed through the same fiber are assigned  ...  Combinatorial problems of interest are those which aim either to minimize the number of wavelengths (intuitively, we may think of the wavelengths as colors) for a set of connections or to maximize the  ... 
doi:10.1007/978-3-540-70918-3_6 dblp:conf/stacs/Caragiannis07 fatcat:za4i7yvv4bhszewzp3swtw2hqm

Guest editorial protocols and architectures for next generation optical WDM networks

O. Gerstel, B. Li, A. McGuire, G. Rouskas, K.M. Sivalingam, Zhensheng Zhang, R. Ramaswami
2000 IEEE Journal on Selected Areas in Communications  
In the paper, "Optimal Routing and Wavelength Assignment in WDM Ring Networks," Lee et al., study the routing and wavelength assignment problem on WDM rings without wavelength conversion.  ...  A new approach to solving a very practical problem-minimizing the number (and cost) of SONET add/drop multiplexers (ADMs) in a WDM ring network-is presented in the paper, "Reducing Electronic Multiplexing  ... 
doi:10.1109/jsac.2000.887903 fatcat:fcupyx36gnbktozdcgojhoowhy

Efficient resource management via dynamic bandwidth sharing in a WDM-PON ring-based architecture

Kostas Ramantas, Kyriakos Vlachos, Georgios Ellinas, Antonis Hadjiantonis
2012 2012 14th International Conference on Transparent Optical Networks (ICTON)  
In this work we propose an efficient resource management approach for WDM-PON ring architectures that supports dynamic bandwidth allocation and sharing of downstream wavelengths.  ...  We propose a modification in the ONU design, to dynamically setup virtual circuits for inter-ONU communication.  ...  RING ARCHITECTURE & ONU DESIGN The WDM-PON architecture utilized connects the ONUs in a ring topology, constituting the feeder network, and the OLT is connected to the ring via a bidirectional fiber link  ... 
doi:10.1109/icton.2012.6253747 fatcat:6plcdyztl5dtxlyv64ecpgl3r4

Evolution of optical transport technologies: from SONET/SDH to WDM

D. Cavendish
2000 IEEE Communications Magazine  
As this technology swap comes to an end, WDM technology is dawning, promising to revolutionize the network industry, with the pos  ...  It took roughly 10 years for the transport network industry to migrate from PDH to SONET.  ...  WAVELENGTH PACKING IN SONET AND WDM INTERNETWORKS The performance and cost of a SONET/WDM integrated network depend on several issues, such as the number of OADMs and topology (ring/mesh).  ... 
doi:10.1109/35.846090 fatcat:tsa3p4j6xrdlzp7mhpee4lth5m

An Optical Wdm Network Concept For Tanzania

S. Pazi, C. Chatwin, R. Young, P. Birch
2009 Zenodo  
This paper introduces the concept of an optical WDM network for Internet infrastructure in Tanzania, so as to reduce Internet connection costs, and provide Internet access to the majority of people who  ...  Internet connectivity to the rest of the world is via expensive satellite links, thus leaving the majority of the population unable to access the Internet due to the high cost.  ...  Normally they are installed in a heavy Internet traffic node, e.g. in Dar -es-Salaam (DSM) city or to connect two WDM rings as shown in the block diagram in Fig. 1 . V.  ... 
doi:10.5281/zenodo.1073350 fatcat:5jdgq6teajcthiricetl2qrqc4

Architectural considerations in the design of WDM-based optical access networks

Eytan Modiano, John M. Senior, Chunming Qiao
1998 All-Optical Networking: Architecture, Control, and Management Issues  
In particular we discuss the joint design of the electronic and optical layers including: WDM Medium Access Control protocols; the choice of electronic multiplexing and switching between the IP and WDM  ...  to minimize the cost of electronic multiplexing.  ...  The most used heuristic assigns the wavelength that is used on the most number of fibers in the network and lastly, the maxsum algorithm assigns the wavelength that maximizes the number of paths that can  ... 
doi:10.1117/12.327048 fatcat:vx46taqirbdlvkvy7rim7zhbnq

Performance of WDM transport networks

E. Karasan, E. Ayanoglu
1998 IEEE Journal on Selected Areas in Communications  
With the expectation that the next step is end-to-end networking of wavelengths (in the optical domain without conversion to electronics), there is a need for new design techniques, a new understanding  ...  of the performance issues, and a new performance evaluation methodology in such networks.  ...  In this study, the existing connections in the network are allowed to be rerouted in order to accommodate a larger number of connections arriving within the new batch.  ... 
doi:10.1109/49.725180 fatcat:ppuqa6asbvbwjpzevvyyn4bb2a

Multicast wavelength assignment with sparse wavelength converters to maximize the network capacity using ILP formulation in WDM mesh networks

I-Shyan Hwang, San-Nan Lee, Ying-Fung Chuang
2006 Photonic network communications  
Previous studies on WDM multicast have mainly focused on the WDM multicast routing. The multicast wavelength assignment problem is studied in this paper.  ...  In general, the multicast routing and wavelength assignment (MC-RWA) can be subdivided as routing and wavelength assignment issues in WDM mesh networks.  ...  [4, 5] addressed the problems for maximizing the number of wavelengths.  ... 
doi:10.1007/s11107-006-0009-2 fatcat:xr4c3ropkveyxazhjqapbtrbky

Multicast Wavelength Assignment with Sparse Wavelength Converters to Maximize the Network Capacity using ILP formulation in WDM Mesh Networks

San-Nan Lee
2006 Proceedings of the 9th Joint Conference on Information Sciences (JCIS)  
Previous studies on WDM multicast have mainly focused on the WDM multicast routing. The multicast wavelength assignment problem is studied in this paper.  ...  In general, the multicast routing and wavelength assignment (MC-RWA) can be subdivided as routing and wavelength assignment issues in WDM mesh networks.  ...  [4, 5] addressed the problems for maximizing the number of wavelengths.  ... 
doi:10.2991/jcis.2006.312 dblp:conf/jcis/Lee06c fatcat:rj7uqfsrkbem3naupwfchel2va

WDM optical communication networks: progress and challenges

B. Mukherjee
2000 IEEE Journal on Selected Areas in Communications  
of startups have been formed, and optical WDM technology is being deployed in the marketplace at a very rapid rate.  ...  The objective of this paper is to summarize the basic optical-networking approaches, briefly report on the WDM deployment strategies of two major U.S. carriers, and outline the current research and development  ...  Fault Management In a wavelength-routed WDM network (as well as in other networks), the failure of a network element (e.g., fiber link, cross-connect, etc.) may cause the failure of several optical channels  ... 
doi:10.1109/49.887904 fatcat:bhqvafhiovdh3bpg2grwnkmeki

Design and analysis of a conceptual wavelength-division multiplexing optical network based on self-similarity

Shu-Tsung Kuo
2010 Optical Engineering: The Journal of SPIE  
Moreover, the idea of bands is applied to unify wavelength management on all network levels. Network analysis is performed to assess the feasibility of our approach.  ...  Our approach lies on a simple network topology as well as an efficient wavelength management scheme being uniformly applied to all network levels.  ...  The aim of an efficient wavelength management scheme is to maximize wavelength reuse while minimizing wavelength conversion.  ... 
doi:10.1117/1.3309456 fatcat:n6nopfgie5b6le22jv2jgjamyu

A practical vision for optical transport networking

Rod C. Alferness, Paul A. Bonenfant, Curtis J. Newton, Kevin A. Sparks, Eve L. Varma
2002 Bell Labs technical journal  
In much the same way that digital cross-connects emerged to manage capacity at the electrical layer, optical cross-connects (OXCs) will emerge to manage capacity at the optical layer.  ...  In short, WDM allows service providers to tap into the full capacity of their existing fiber plant, thus maximizing the return on existing facilities.  ... 
doi:10.1002/bltj.2144 fatcat:byugc3cqxzhhnakgjcs57i2j3q

Fault management in IP-over-WDM networks: WDM protection versus IP restoration

L. Sahasrabuddhe, S. Ramamurthy, B. Mukherjee
2002 IEEE Journal on Selected Areas in Communications  
Any two IP routers in this network can be connected together by an all-optical wavelength-division multiplexing (WDM) channel, called a lightpath, and the collection of lightpaths that are set up form  ...  in the event of a fiber failure and the recovery time) relative to each other.  ...  We use ms in our calculations. 7) The number of hops from the node adjacent to the failed fiber to the source node of the connection is . 8) The number of hops in the backup route from the source node  ... 
doi:10.1109/49.974659 fatcat:ivpq5636nvh5fc3n2wim25rcyi

A review of fault management in WDM mesh networks: basic concepts and research challenges

Jing Zhang, S. Mukherise
2004 IEEE Network  
In particular, we present a framework for cost-effective availability-aware connection provisioning to provide differentiated services in WDM mesh networks.  ...  In addition, the emerging problem of protecting low-speed connections of different bandwidth granularities is also reviewed.  ...  As networks migrate from stacked rings to meshes because of the poor scalability of interconnected rings and the excessive resource redundancy used in ring-based fault management schemes, designing and  ... 
doi:10.1109/mnet.2004.1276610 fatcat:d2tfyf6xprfuxokvnhvzuauhiy
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