7 research outputs found

    Deflection Routing Strategies for Optical Burst Switching Networks: Contemporary Affirmation of the Recent Literature

    Get PDF
    A promising option to raising busty interchange in system communication could be Optical Burst Switched (OBS) networks among scalable and support routing effective. The routing schemes with disputation resolution got much interest, because the OBS network is buffer less in character. Because the deflection steering can use limited optical buffering or actually no buffering thus the choice or deflection routing techniques can be critical. Within this paper we investigate the affirmation of the current literature on alternate (deflection) routing strategies accessible for OBS networks

    Mecanismes de resoluci贸 de contencions per a xarxes de commutaci贸 貌ptica de r脿fegues (OBS)

    Get PDF
    En aquest treball s鈥檃valua, mitjan莽ant simulaci贸, el comportament de diferents mecanismes de resoluci贸 de contencions per a les xarxes de commutaci贸 貌ptica de r脿fegues (OBS). La primera part del treball consisteix en programar i incorporar al simulador els m貌duls que permeten simular les funcions dels diferents mecanismes avaluats: conversi贸 de longitud d鈥檕na (Conv), fibres de retard (FDL) i combinacions dels dos mecanismes anteriors (Conv+FDL i FDL+Conv). A continuaci贸 s鈥檃valuen i es comparen els mecanismes de resoluci贸 de contencions en termes de retard i probabilitat de p猫rdua en dos escenaris diferents: (1) xarxa amb topologia lineal i fonts directament connectades als nodes de la l铆nia i (2) xarxa formada interconnectant el node central de diverses estrelles, els nodes extrems de les quals s贸n les fonts. Els resultats mostren la difer猫ncia de comportament de cada mecanisme de resoluci贸 de contencions en funci贸 de la topologia i la ubicaci贸 de les fonts a la xarxa. En aquest treball es discuteixen els avantatges i inconvenients d鈥檜tilitzar cadascun dels mecanismes per separat aix铆 com de manera combinada. A m茅s a m茅s, el treball es complementa amb un apartat te貌ric on s鈥檈xpliquen les bases de la tecnologia de commutaci贸 貌ptica de r脿fegues (OBS) i dos models anal铆tics senzills per als casos de conversi贸 de longitud d鈥檕na i de fibres de retard

    Mecanismes de resoluci贸 de contencions per a xarxes de commutaci贸 貌ptica de r脿fegues (OBS)

    Get PDF
    En aquest treball s鈥檃valua, mitjan莽ant simulaci贸, el comportament de diferents mecanismes de resoluci贸 de contencions per a les xarxes de commutaci贸 貌ptica de r脿fegues (OBS). La primera part del treball consisteix en programar i incorporar al simulador els m貌duls que permeten simular les funcions dels diferents mecanismes avaluats: conversi贸 de longitud d鈥檕na (Conv), fibres de retard (FDL) i combinacions dels dos mecanismes anteriors (Conv+FDL i FDL+Conv). A continuaci贸 s鈥檃valuen i es comparen els mecanismes de resoluci贸 de contencions en termes de retard i probabilitat de p猫rdua en dos escenaris diferents: (1) xarxa amb topologia lineal i fonts directament connectades als nodes de la l铆nia i (2) xarxa formada interconnectant el node central de diverses estrelles, els nodes extrems de les quals s贸n les fonts. Els resultats mostren la difer猫ncia de comportament de cada mecanisme de resoluci贸 de contencions en funci贸 de la topologia i la ubicaci贸 de les fonts a la xarxa. En aquest treball es discuteixen els avantatges i inconvenients d鈥檜tilitzar cadascun dels mecanismes per separat aix铆 com de manera combinada. A m茅s a m茅s, el treball es complementa amb un apartat te貌ric on s鈥檈xpliquen les bases de la tecnologia de commutaci贸 貌ptica de r脿fegues (OBS) i dos models anal铆tics senzills per als casos de conversi贸 de longitud d鈥檕na i de fibres de retard

    Performance analysis of optical burst switching network

    Get PDF
    In this dissertation, after reviewing the new paradigm in the optical switching network invoked by the DWDM technology and studying the changes of the schemes, we design the new optical burst switching networks, analyze the performance of the proposed scheme and interpret the analysis results. For design point of view, the fairness guaranteeing scheme and burst blocking reduction schemes in the mesh networks, loss less burst transmission scheme in DWDM metro ring networks are considered. As a future broad band optical alternative, optical burst switching has been receive much focus. We review the property of the optical switching technologies such as optical packet switching, optical circuit switching, and optical burst switching. The benefits of the optical burst switching is illustrated. Even though optical burst switching has several advantage, it has intrinsic technology barrier. We study the research activities to remove the basic problem of optical burst switching. Optical deflection, optical burst segmentation, burst cloning, and burst piggy backing scheme is considered. To improve the network performance, we design optical burst switching network in mesh networks and metro ring networks. We also implement the proposed network by our own developed network test bench. We verify the proposed network performance by analyzing the network mathematically in terms of blocking rate, delay and throughput. The theoretical results are compared with the simulation results. The verification shows that our proposed schemes outperform those of the conventional scheme. Our mathematical models are also matched to the simulation results. The interpretation of the verification shows that our assumption and theoretical analysis is well designed. The results illustrate that the difference between the simulation results and mathematical results is within the considerable margin. The contribution of the thesis is that the performance improvement schemes in both of the mesh network and ring network are proposed and analyzed. By considering feasibility of the future optical networks, proposed scheme in this thesis is more deployable in commercial network in terms of the burst blocking rate and delay as well as the network stability

    On the design of Optical Deflection - Routing Networks

    No full text
    Deflection routing plays a prominent role in many optical network architectures, because it can be implemented with modest packet-buffering requirements. From the practical perspective, however, the implementation of deflection routing, which is normally based on global time slotting, might pose challenges. The authors develop approaches to the implementation of both slotted and unslotted deflection-routing optical networks. They analyse important tradeoffs that are inherent to the design of optical deflection-routing networks and compare the performance of slotted and unslotted networks. Under a reasonable set of assumptions about optical technology, the results suggest that the unslotted link protocol should be the preferred approach to building the optical deflection-routing networ
    corecore