Design of hybrid waveband-switched networks with OEO traffic grooming

Yao, Shun; Mukherjee, B.

doi:10.1109/ofc.2003.1248134

Cited by 22 publications

(14 citation statements)

References 6 publications

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“…Equation 10 defines that in a waveband if a wavelength needs to be dropped or accessed at node v, this waveband should be demultiplexed into individual wavelengths.…”

Section: Integer Linear Programming Formulation For Lt-wbsmentioning

confidence: 99%

“…As the number of wavelengths that can be carried by fibers in optical networks increases, so does the number of optical ports needed for wavelength switching in an optical cross-connect (OXC), which may significantly increase the cost and difficulty associated with controlling large OXCs. Therefore, waveband switching (WBS) [2][3][4][5][6][7][8][9][10][11][12] has been proposed to address this problem. With WBS, several wavelengths may be treated as a bundle (or a waveband) if they share the same switch route.…”

Section: Introductionmentioning

confidence: 99%

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On service provisioning using light-trails in WDM optical networks with waveband switching

Luo

Wang

2010

Photon Netw Commun

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As the number of wavelengths in a single optical fiber increases, so does the number of ports needed for wavelength switching in optical cross-connects (OXCs), which may significantly increase the cost and difficulty associated with controlling large OXCs. Waveband switching (WBS) treats several wavelengths as a bundle that is switched through a single port if they share the same switch route, so that the number of ports needed can be reduced. On the other hand, light-trails in wavelength division multiplexing (WDM) optical networks allow intermediate nodes on established optical paths to access the data paths whereas lightpaths only allow two end nodes to access the data paths. Therefore, light-trails offer significantly better flexibility for service provisioning and traffic grooming. In this article, we study service provisioning using light-trails in WDM optical networks with the WBS capability under a static traffic model. For comparison, integer linear programs are formulated for establishing light-trails with and without WBS. Numerical studies show that in certain cases, service provisioning with WBS in light-trail networks can reduce the number of ports needed while providing a more flexible subwavelength service provisioning capability. However, contrary to intuition, in most cases applying the WBS technique requires more ports in OXCs in light-trail networks. This study provides insights into the network design problem that applies the WBS technology to light-trail based optical networks.

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“…Equation 10 defines that in a waveband if a wavelength needs to be dropped or accessed at node v, this waveband should be demultiplexed into individual wavelengths.…”

Section: Integer Linear Programming Formulation For Lt-wbsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On service provisioning using light-trails in WDM optical networks with waveband switching

Luo

Wang

2010

Photon Netw Commun

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“…However, with the increase of the number of wavelengths in the network, the number of ports at OXCs also rapidly rises, and increase the cost and difficulty associated with controlling such large cross-connects. Recently Waveband Switching (WBS) has been proposed for optical networks with large number of wavelengths [3][4][5][6][7][8][9][10][11][12][13]. The main idea of WBS is to group several wavelengths together as a band, and switch the band using only one single port instead of several ports whenever possible.…”

Section: Introductionmentioning

confidence: 99%

“…This kind of OXCs which can switch not only wavelengths but also wavebands and even fibers is called Multi-Granular Optical Cross-Connect (MG-OXC). Different kinds of MG-OXC architecture have been proposed in [3][4][5][6][7][8][9][10][11][12][13]. [6] presents and compares two types of MG-OXCs: Singlelayer and Multi-layer MG-OXCs.…”

Section: Introductionmentioning

confidence: 99%

Traffic Grooming Techniques in Optical Networks

Woesner

Chlamtac

2006

2006 3rd International Conference on Broadband Communications, Networks and Systems

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With the increase of the number of wavelengths per fiber waveband switching has been proposed to decrease the number of switching ports in optical nodes. Another concept that of Light trails, allows the intermediate nodes along a lightpath to access the wavelength channel, aiming at the reduction of the number of wavelengths. Both techniques apply traffic grooming on different levels of the WDM network. In this paper, we combine them and compare the two switching techniques: waveband switching lightpath (WBS-LP) and waveband switching lighttrail (WBS-LT).Auxiliary graph models (LP_AG/LT_AG) are proposed for WBS-LP/WBS-LT respectively. These two auxiliary graph models can exploit not only the wavelength resource in the fiber links but also the limited waveband ports resource inside the multi-granular optical cross connects (MG-OXC) nodes. The influence of network parameters, e.g. number of wavebands, ports and transceivers, is studied. The proposed algorithms are compared with shortest path (SP), leastweighted path (LW), and K-least-weighted path (KP) algorithms; numerical simulations show their better performance. For different algorithms, WBS-LT can have better blocking performance than WBS-LP especially when add/drop waveband ports are the critical resources.

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“…Análise do conceito e da forma de se realizar a comutação envolvendo comutadores híbridos de várias camadas [23], [24], [25], [26], [27], [28] de tráfego e conversão de λ e multiplexadores e demultiplexadores de waveband e λ. Comparada com a agregação uniforme, a agregação não-uniforme é mais flexível.…”

Section: -Características Das Redes óPticasunclassified

Arquitetura de nós e engenharia de tráfego em redes ópticas

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DedicatóriaDedico este trabalho aos meus pais Helvécio Moreira de Almeida Júnior e Anamaria Scalon Almeida e minha irmã Anne Scalon Almeida pela compreensão e paciência ao longo desses 7 longos anos de mestrado e doutorado. Dedico também a minha sobrinha Mônica Scalon que nos deu a alegria de sua existência durante esse período.Dedico a minha namorada Thaís Araújo pela paciência, amor e pelo seu tempo dedicado para longas conversas para me acalmar nos dias mais difíceis.Dedico aos dois irmãos que ganhei durante esse período. Luizir Modesto Pereira que com sua experiência profissional e visão de vida tornou essa jornada suportável. E ao meu irmão e companheiro para todas as horas Eduardo Martinelli Galvão de Queiroz que batalhou cada minuto para que conseguíssemos atingir os objetivos que sempre desejamos. Espero estar com vocês pela vida toda. AgradecimentosA Deus, pela saúde para suportar o trabalho.Ao Professor Doutor Amilcar Carelli César, pela excelente orientação, confiança e paciência durante esses 7 anos de mestrado e doutorado.Aos Professores Ben-Hur Viana Borges e José Carlos Sartori pela oportunidade de convivência e pelos conhecimentos.Ao amigo Eduardo José Aloia que, apesar de sua confusão do dia a dia, se torna indispensável para tornar a vida mais divertida. Aos amigos da empresa TCS tecnologia Luis Claudio Teixeira Sanches eLuciana Trevisan pelo suporte dado para as aplicações práticas.

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Design of hybrid waveband-switched networks with OEO traffic grooming

Abstract: We demonstrate that WDM mesh networks consisting of hybrid hierarchical switches (with alloptical waveband switching and OEO trafilc grooming) can significantly reduce cost over conventional OEO networks. We also present heuristics to design such networks.

Cited by 22 publications

References 6 publications

On service provisioning using light-trails in WDM optical networks with waveband switching

On service provisioning using light-trails in WDM optical networks with waveband switching

Traffic Grooming Techniques in Optical Networks

Arquitetura de nós e engenharia de tráfego em redes ópticas

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