Academic literature on the topic 'Generalized Multiprotocol Label Switching (GMPLS)'
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Journal articles on the topic "Generalized Multiprotocol Label Switching (GMPLS)"
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Qiao, Chunming, Wei Wei, and Xin Liu. "Extending generalized multiprotocol label switching (GMPLS) for polymorphous, agile, and transparent optical networks (PATON)." IEEE Communications Magazine 44, no. 12 (2006): 104–14. http://dx.doi.org/10.1109/mcom.2006.273106.
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Salcedo Parra, Octavio J., Danilo López, and Cesar A. Hernández. "Evaluación de los protocolos OSPF-TE y BGP en funciones de autodescubrimiento para L1VPN sobre GMPLS." Revista Tecnura 16, no. 33 (2012): 131. http://dx.doi.org/10.14483/udistrital.jour.tecnura.2012.3.a09.
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Las tecnologías GMPLS (Generalized Multiprotocol Label Switching Architecture) conforman un nuevo framework de protocolos, el cual es una versión extendida de MPLS que no solamente realiza las labores MPLS sino que además tiene protocolos especializados para descubrir vecinos, distribuir información de enlace, realizar administración de la topología, realizar administración de rutas, balanceo de cargas, implementar un control centralizado, manejar ancho de banda bajo demanda y así mismo manejar VPNs (Virtual Private Networks) a nivel físico-óptico mediante el uso de los dispositivos ópticos adecuados. En este artículo se evaluan los resultados de una simulación del mecanismo de autodescubrimiento en una VPN de capa uno usando los protocolos OSPF-TE y BGP utilizando como herramienta de simulacion el simulador GLASS(GMPLS Lightwave Agile Switching Simulator). Con esto se pretende dar una visión al lector de todo el potencial de GMPLS como nuevo framework a implementar y, así mismo, realizar un análisis mediante el cual se puedan ver las ventajas y desventajas de utilizar OSPF-TE o BGP como protocolo de autodescubrimiento en una VPN de capa uno para un escenario de red específico.
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Holler, Holger, and Stefan Voß. "Software tools for a multilayer network design." Journal of Telecommunications and Information Technology, no. 3 (September 30, 2005): 57–63. http://dx.doi.org/10.26636/jtit.2005.3.325.
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Today’s long haul and metro high-speed networks are mainly based on synchronous digital hierarchy (SDH) or its American equivalent synchronous optical network (SONET) and wavelength division multiplex (WDM). On the other hand, the large amount of traffic growth during the last years has been caused mainly by Internet protocol (IP) traffic. Traditionally, the IP-router based networks and the cross-connect based synchronous networks are often planned and operated separately. However, in line with new developments such as generalized multiprotocol label switching (GMPLS), network providers begin to realize that the convergence of these two worlds promises significant benefits. A set of software tools to support the network designer has been developed and used on various kinds of real world network planning problems arising in the SDH/WDM context. This includes, among others, 1+1 protection planning, static restoration and dual homing issues. These tools are extended with additional features to handle aspects of the IP/SDH interplay in a GMPLS environment. The two main components are an AMPL based integer model (solved via CPLEX) and a heuristic implemented in C++.
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Muñoz, Raül, Ramon Casellas, Ricard Vilalta, and Ricardo Martínez. "Dynamic and Adaptive Control Plane Solutions for Flexi-grid Optical Networks based on Stateful PCE." Journal of Lightwave Technology 32, no. 16 (2016): 2703–15. https://doi.org/10.5281/zenodo.57996.
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Adaptive flexi-grid optical networks should be able to autonomously decide where and when to dynamically setup, reoptimize, and release elastic optical connections, in reaction to network state changes. A stateful path computation element (PCE) is a key element for the introduction of dynamics and adaptation in generalized multiprotocol label switching (GMPLS)-based distributed control plane for flexi-grid DWDM networks (e.g., global concurrent reoptimization, defragmentation, or elastic inverse-multiplexing), as well as for enabling the standardized deployment of the GMPLS control plane in the software defined network control architecture. First, this paper provides an overview of passive and active stateful PCE architectures for GMPLS-enabled flexi-grid DWDM networks. A passive stateful PCE allows for improved path computation considering not only the network state (TED) but also the global connection state label switched paths database (LSPDB), in comparison with a (stateless) PCE. However, it does not have direct control (modification, rerouting) of path reservations stored in the LSPDB. The lack of control of these label switched paths (LSPs) may result in the suboptimal performance. To this end, an active stateful PCE allows for optimal path computation considering the LSPDB for the control of the state (e.g., increase of LSP bandwidth, LSP rerouting) of the stored LSPs. More recently, an active stateful PCE architecture has also been proposed that exposes the capability of setting up and releasing new LSPs. It is known as active stateful PCE with instantiation capabilities. This paper presents the first prototype implementation and experimental evaluation of an active stateful PCE with instantiation capabilities for the GMPLS-controlled flexi-grid DWDM network of the ADRENALINE testbed.
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Vilalta, Ricard, Raül Muñoz, Ramon Casellas, et al. "Multidomain Network Hypervisor for Abstraction and Control of OpenFlow-Enabled Multitenant Multitechnology Transport Networks." Journal of Optical Communications and Networking 7, no. 11 (2015): B55. https://doi.org/10.5281/zenodo.46111.
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A virtualization architecture is presented for deploying multitenant virtual networks on top of multitechnology optical networks. A multidomain network hypervisor (MNH) and a multidomain SDN orchestrator (MSO) are introduced with this purpose. The MNH provides an abstract view of each virtual network and gives control of it to each independent customer SDN controller. The MNH is able to provide virtual networks across heterogeneous control domains (i.e., generalized multiprotocol label switching and OpenFlow) and transport technologies (i.e., optical packet switching and elastic optical networks). The MSO is responsible for providing the necessary end-to-end connectivity. We have designed, implemented, and experimentally evaluated the MNH and MSO in an international testbed across Spain, UK, Germany, and Japan.
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Mayoral, Arturo, Ricard Vilalta, Raül Muñoz, et al. "Control Orchestration Protocol: unified transport API for distributed cloud and network orchestration." JOURNAL OF OPTICAL COMMUNICATIONS AND NETWORKING 9, no. 2 (2017): A216—A222. https://doi.org/10.1364/JOCN.9.00A216.
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In the context of the fifth generation of mobile technology (5G), multiple technologies will converge into a unified end-to-end system. For this purpose, software defined networking (SDN) is proposed, as the control paradigm will integrate all network segments and heterogeneous optical and wireless network technologies together with massive storage and computing infrastructures. The control orchestration protocol is presented as a unified transport application programming interface solution for joint cloud/network orchestration, allowing interworking of heterogeneous control planes to provide provisioning and recovery of quality of service (QoS)-aware end-to-end services. End-to-end QoS is guaranteed by provisioning and restoration schemes, which are proposed for optical circuit/packet switching restoration by means of signal monitoring and adaptive modulation and adaptive route control, respectively. The proposed solution is experimentally demonstrated in an international multi-partner test bed, which consists of a multi-domain transport network comprising optical circuit switching and optical packet switching domains controlled by SDN/OpenFlow and Generalized Multiprotocol Label Switching (GMPLS) control planes and a distributed cloud infrastructure. The results show the dynamic provisioning of IT and network resources and recovery capabilities of the architecture.
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Mathur, Tushar, Gokhan Sahin, and Donald R. Ucci. "A Performance Comparison of Centralized and Distributed Spectrum Management Techniques in Elastic Optical Networks." Journal of Engineering 2019 (January 1, 2019): 1–13. http://dx.doi.org/10.1155/2019/3860685.
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Elastic optical networks (EONs) have emerged to provide higher spectrum efficiency than traditional Dense Wavelength-Division-Multiplexing (DWDM) by utilizing enabling technologies such as flexible spectrum grid, Orthogonal Frequency Division Multiplexing (OFDM), and distance adaptive rate and modulation. The choice of the control-plane is an important consideration when deploying any new technology, especially in optical networks. This paper considers generic distributed and centralized spectrum assignment policies in conjunction with the accompanying connection set-up signaling protocols in EONs. A network simulator for Generalized Multiprotocol Label Switching (GMPLS) was developed with Forward Reservation Protocol and Backward Reservation Protocol signaling methods. These signaling techniques are used with the First Fit (FF) and Random Fit (RF) Routing and Spectrum Allocation (RSA) algorithms. The paper discusses control elements (central and distributed architectures) decisions under busy hour and normal network conditions and presents a comprehensive performance analysis of key performance metrics such as connection success rate, connection establishment time, and capacity requirement.
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Casellas, Ramon, Raul Muñoz, Ricardo Martínez, et al. "Overarching Control of Flexi Grid Optical Networks: Interworking of GMPLS and OpenFlow Domains." IEEE/OSA Journal of Lightwave Technology 33, no. 5 (2015): 1054–62. https://doi.org/10.5281/zenodo.47522.
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Optical transport networks provide transport, multiplexing, routing, management, supervision, and survivability of optical channels. Within a flexible dense wavelength division multiplexing grid, the optical spectrum can be allocated in multiples of a width granularity, depending on the client signal rate and modulation format. A control plane (CP) can be used for efficient and dynamic provisioning and recovery of flexi-grid connections. Two main CP architectures coexist, with common functions like addressing, automatic topology discovery, network abstraction, path computation, and connection provisioning: a distributed generalized multiprotocol label switching CP (with optional path computation element, PCE path computation and instantiation/modification) and a CP based on software-defined networking, with a logically centralized controller and an open protocol, such as the OpenFlow protocol. Both architectures have their own strengths and weaknesses, and are being extended to address the new requirements associated with the aforementioned emerging optical technologies, such as flexible spectrum allocation, efficient corouted connection setup, and configuration of related optical parameters. However, new use cases such as remote data center interconnection highlight the need for multidomain service provisioning, and heterogeneous CP interworking, potentially requiring an overarching control. Different alternatives, with varying degrees of integration and flexibility, are available: straightforward approaches characterized by the adaptation of one control model to the other or more advanced interworking requiring the definition of common models (e.g., a subset of attributes for network elements) and of coordination and orchestration functions. This paper discusses the main relevant interworking architectures and presents a selected set of use cases and proof-of-concepts.
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Casellas, Ramon, Ricardo Martínez, Raül Muñoz, Ricard Vilalta, and Lei Liu. "Control and Orchestration of Multidomain Optical Networks With GMPLS as Inter-SDN Controller Communication." Journal of Optical Communications and Networking 7, no. 11 (2015): B46—B54. https://doi.org/10.5281/zenodo.46114.
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Emerging use cases, such as the orchestration of heterogeneous domains or the interconnection of remote data centers, require the design of new network control, management, and orchestration architectures that are adapted to the requirements associated with end-to-end services. This heterogeneity, stemming from actual deployments, is related to the involved data and control technologies or due to network segmentation. It is acknowledged that, in these scenarios, the deployment of a single software-defined networking (SDN) controller may not be practical or may have fundamental limitations, in terms of either scalability, complexity, or interoperability. To address this trend, and as a means to cope with the complexity growth, research in this area is considering the concept of SDN orchestration (the coordinated control of heterogeneous systems), abstraction (the selection of entity-relevant attributes), and the use of multiple controllers, commonly arranged in hierarchical or flat configurations. In this paper, we consider a hybrid approach combining elements from distributed control with elements from centralized control, relying on the concepts of abstraction and aggregation and hierarchical traffic engineering (TE). We propose a multidomain and multivendor network control architecture organized in layers, the abstract network layer and the control-specific layer, resulting in a mesh of generic SDN controllers that use generalized multiprotocol label switching (GMPLS) protocols as their east/west interfaces (open shortest path first TE and Resource Reservation Protocol with extensions for TE as inter-SDN controller communications protocols), forming an abstracted topology. To validate the approach, and to evaluate factors such as end-to-end network service deployment delay or control overhead, the proposed architecture is implemented and validated in a control plane testbed. While emphasis is given to the control of optical (flexi-grid) networks, the proposed approach can be generalized to other transport technologies.
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Muñoz, Raul, Ricard Vilalta, Ramon Casellas, et al. "Transport Network Orchestration for end-to-end Multi-layer Provisioning Across heterogeneous SDN/OpenFlow and GMPLS/PCE Control Domains." Journal of Lightwave Technology 33, no. 8 (2015): 1540–48. https://doi.org/10.5281/zenodo.47601.
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A multidomain optical transport network composed of heterogeneous optical transport technologies (e.g., flexi/fixed-grid optical circuit switching and optical packet switching) and control plane technologies (e.g., centralized OpenFlow or distributed GMPLS) does not naturally interoperate, and a network orchestration mechanism is required. A network orchestrator allows the composition of end-to-end network service provisioning across multidomain optical networks comprising different transport and control plane technologies. Software-defined networking (SDN) is a key technology to address this requirement, since the separation of control and data planes makes the SDN a suitable candidate for end-to-end provisioning service orchestration across multiple domains with heterogeneous control and transport technologies. This paper presents two different network orchestration's architectures based on the application-based network operations (ABNO) which is being defined by IETF based on standard building blocks. Then, we experimentally assesses in the international testbed of the STRAUSS project, an ABNO-based network orchestrator for end-to-end multi-layer (OPS and Flexi-grid OCS) and multidomain provisioning across heterogeneous control domains (SDN/OpenFlow and GMPLS/Stateful PCE) employing dynamic domain abstraction based on virtual node aggregation.
Dissertations / Theses on the topic "Generalized Multiprotocol Label Switching (GMPLS)"
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Calle, Ortega Eusebi. "Enhanced fault recovery methods for protected traffic services in GMPLS networks." Doctoral thesis, Universitat de Girona, 2004. http://hdl.handle.net/10803/7727.
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Les noves tecnologies a la xarxa ens permeten transportar, cada cop més, grans volums d' informació i trànsit de xarxa amb diferents nivells de prioritat. En aquest escenari, on s'ofereix una millor qualitat de servei, les conseqüències d'una fallada en un enllaç o en un node esdevenen més importants. <br/>Multiprotocol Lavel Switching (MPLS), juntament amb l'extensió a MPLS generalitzat (GMPLS), proporcionen mecanismes ràpids de recuperació de fallada establint camins, Label Switch Path (LSPs), redundants per ser utilitzats com a camins alternatius. En cas de fallada podrem utilitzar aquests camins per redireccionar el trànsit. <br/>El principal objectiu d'aquesta tesi ha estat millorar alguns dels actuals mecanismes de recuperació de fallades MPLS/GMPLS, amb l'objectiu de suportar els requeriments de protecció dels serveis proporcionats per la nova Internet. Per tal de fer aquesta avaluació s'han tingut en compte alguns paràmetres de qualitat de protecció com els temps de recuperació de fallada, les pèrdues de paquets o el consum de recursos.<br/>En aquesta tesi presentem una completa revisió i comparació dels principals mètodes de recuperació de fallada basats en MPLS. Aquest anàlisi inclou els mètodes de protecció del camí (backups globals, backups inversos i protecció 1+1), els mètodes de protecció locals i els mètodes de protecció de segments. També s'ha tingut en compte l'extensió d'aquests mecanismes a les xarxes òptiques mitjançant el pla de control proporcionat per GMPLS.<br/>En una primera fase d'aquest treball, cada mètode de recuperació de fallades és analitzat sense tenir en compte restriccions de recursos o de topologia. Aquest anàlisi ens dóna una primera classificació dels millors mecanismes de protecció en termes de pèrdues de paquets i temps de recuperació. Aquest primer anàlisi no és aplicable a xarxes reals. Per tal de tenir en compte aquest nou escenari, en una segona fase, s'analitzen els algorismes d'encaminament on sí tindrem en compte aquestes limitacions i restriccions de la xarxa. <br/>Es presenten alguns dels principals algorismes d'encaminament amb qualitat de servei i alguna de les principals propostes d'encaminament per xarxes MPLS. La majoria dels actual algorismes d'encaminament no tenen en compte l'establiment de rutes alternatives o utilitzen els mateixos objectius per seleccionar els camins de treball i els de protecció. <br/>Per millorar el nivell de protecció introduïm i formalitzem dos nous conceptes: la Probabilitat de fallada de la xarxa i l'Impacte de fallada. Un anàlisi de la xarxa a nivell físic proporciona un primer element per avaluar el nivell de protecció en termes de fiabilitat i disponibilitat de la xarxa. Formalitzem l'impacte d'una fallada, quant a la degradació de la qualitat de servei (en termes de retard i pèrdues de paquets). <br/>Expliquem la nostra proposta per reduir la probabilitat de fallada i l'impacte de fallada. Per últim fem una nova definició i classificació dels serveis de xarxa segons els valors requerits de probabilitat de fallada i impacte.<br/>Un dels aspectes que destaquem dels resultats d'aquesta tesi és que els mecanismes de protecció global del camí maximitzen la fiabilitat de la xarxa, mentre que les tècniques de protecció local o de segments de xarxa minimitzen l'impacte de fallada. Per tant podem assolir mínim impacte i màxima fiabilitat aplicant protecció local a tota la xarxa, però no és una proposta escalable en termes de consum de recursos. Nosaltres proposem un mecanisme intermig, aplicant protecció de segments combinat amb el nostre model d'avaluació de la probabilitat de fallada. <br/>Resumint, aquesta tesi presenta diversos mecanismes per l'anàlisi del nivell de protecció de la xarxa. Els resultats dels models i mecanismes proposats milloren la fiabilitat i minimitzen l'impacte d'una fallada en la xarxa.<br>New network technology enables increasingly higher volumes of information to be carried. Various types of mission-critical, higher-priority traffic are now transported over these networks. In this scenario, when offering better quality of service, the consequences of a fault in a link or node become more pronounced. <br/>Multiprotocol Label Switching (MPLS) and the extended Generalized MPLS (GMPLS) provide fast mechanisms for recovery from failures by establishing redundant Label Switch Paths as backup paths. With these backups, traffic can always be redirected in case of failure. <br/>The main objective of this thesis is to improve some of the current MPLS/GMPLS fault recovery methods, in order to support the protection requirements of the new Internet services. Some parameters, such as fault recovery time, packet loss or resource consumption, all within the scope of this quality of protection, are considered. <br/>In this thesis a review and detailed comparison of the MPLS fault recovery methods are presented. Path protection methods (global backups, reverse backups and 1+1 methods), as well as segment protection and local methods are included in this analysis. The extension of these mechanisms to optical networks using GMPLS control plane is also taken into account.<br/>In the first phase MPLS fault recovery methods are analyzed without taking into account resource or network topology constraints. This analysis reported a first classification of the best protection methods in terms of packet loss and recovery time. This first analysis cannot be applied to real networks. In real networks, bandwidth or network topology constraints can force a change in the a priori optimal protection choice. In this new scenario, current routing algorithms must be analyzed. <br/>The main aspects of the QoS routing methods are introduced, and some of these mechanisms are described and compared. QoS routing algorithms do not include protection as a main objective and, moreover, the same QoS objectives for selecting the working path are used for selecting the backup path. <br/>In order to evaluate the quality of protection, two novel concepts are introduced and analyzed: the network failure probability and the failure impact. The physical network provides an initial value of the network protection level in terms of network reliability and availability. A proposal to evaluate network reliability is introduced, and a formulation to calculate the failure impact (the QoS degradation in terms of packet loss and delay) is presented. <br/>A proposal to reduce the failure probability and failure impact as well as the enhancement of some current routing algorithms in order to achieve better protection are explained. A review of the traffic services protection requirements and a new classification, based on the failure probability and failure impact values, is also provided in this work.<br/>Results show that path protection schemes improve network reliability. Segment/local protection schemes reduce the network failure impact. Minimum impact with maximum reliability can be achieved using local protection throughout the entire network. However, it is not scalable in terms of resource consumption. In this case our failure probability evaluation model can be used to minimize the required resources. Results demonstrate the reduction of the failure impact combining segment protection and our network reliability evaluation model in different network scenarios.<br/>In summary, an in-depth analysis is carried out and a formulation to evaluate the network protection level is presented. This evaluation is based on network reliability maximization and failure impact reduction in terms of QoS degradation. A scalable proposal in terms of resource consumption, detailed and experimentally analyzed, offers the required level of protection in different network scenarios for different traffic services.
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Feres, Mariana Massimino. "Estudo de algoritmos RWA em redes GMPLS sobre DWDM." Universidade Federal de São Carlos, 2009. https://repositorio.ufscar.br/handle/ufscar/442.
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Previous issue date: 2009-06-08<br>Financiadora de Estudos e Projetos<br>The increase in the number of users and the emergence of sophisticated network applications motivate the research to improve the data-communication technologies, and thus to meet the requirement for bandwidth. In optical networks, one of the main advances is wavelength division multiplexing (WDM). An essential issue in designing of optical networks is how the network will be controlled, that is, which type of signaling will be used for resources reservation, routing and wavelength assigning, and how physical impairments will be dealfish. This implies in the necessity of several devices to guarantee the good functioning of the network. The diversity and complexity of administration of these devices stimulate the creation of GMPLS (Generalized Multiprotocol Label Switching), in order to provide control, for domains not only based on packages (as it makes the MPLS - Multiprotocol Label Switching), but also on time slots, wavelength and fiber. However, the labels switching on the wavelength multiplexing can generate a NP-complete problem involving the routing and wavelength assignment: if both do no succeed, the connection blocking will occur with and loss of network performance. Another relevant question is that, in all-optical networks, there is some physical impairment that influence the blocking probability e must be taken in consideration in algorithms RWA. This work presents the study of the control plan GMPLS and RWA algorithms for the setting up of connections in alloptical WDM networks. Moreover, the study of two physical impairments (polarization mode dispersion and optical signal noise rate) was done, inserting them in RWA algorithm to reduce the blocking probability due them. The results had shown that the MostUsed algorithm has better performance than the BestFit and the Random one when considered the connection blocking due to resources (lambdas). Moreover, the use of impairments-aware algorithms influence significantly in the reduction of the blocking probability. Therefore, the more advantageous performance was observed in the use of impairment-aware algorithms simultaneously with the MostUsed algorithm.<br>O aumento de usuários e o surgimento de aplicações de redes sofisticadas impulsionam as pesquisas para aprimorar as tecnologias de transmissão de dados, e assim suprir a exigência por largura de banda. Em redes ópticas, um dos principais avanços é o surgimento da multiplexação de comprimento de onda (WDM). Desta forma, uma questão essencial no projeto de redes ópticas compreende na definição de como a rede será controlada, isto é, qual tipo de sinalização será utilizado para reserva de recursos, definição de rotas, tratamento de falhas, entre outras funções formadoras do plano de controle. Isso implica na necessidade de diversos dispositivos para garantir o bom funcionamento da rede. A diversidade e complexidade de administração desses dispositivos incentivam a criação do GMPLS (Generalized Multiprotocol Label Switching), a fim de prover controle, não somente para domínios baseados em pacotes (como faz o MPLS - Multiprotocol Label Switching), mas também em tempo, comprimento de onda e fibra. Porém, a comutação de rótulos sobre a multiplexação de comprimento de onda pode gerar um problema NP-Completo envolvendo o roteamento e a associação de comprimento de onda, uma vez que se ambas não obtiverem sucesso, ocorrerá o bloqueio da conexão e perda de desempenho da rede. Outra questão relevante é que, em redes totalmente ópticas, existem problemas inerentes da camada física os que influenciam na probabilidade de bloqueio e devem ser levados em consideração em algoritmos RWA (roteamento por associação de comprimento de onda). O presente trabalho realiza o estudo do plano de controle GMPLS e de algoritmos RWA para o estabelecimento de conexões em redes WDM transparentes. Além disso, é feito um estudo de duas restrições da camada física (dispersão por modo de polarização e relação sinal ruído óptica) inserindo-as no algoritmo RWA para diminuir a probabilidade de bloqueio devido a elas. Os resultados mostraram que o algoritmo MostUsed possui melhor desempenho em relação ao BestFit e ao Random quando considerado bloqueio por falta de recursos (lambdas). Além disso, o uso de algoritmos cientes de restrições da camada física influencia significamente na diminuição da probabilidade de bloqueio. Portanto, o melhor desempenho foi observado no uso de algoritmos cientes de restrições físicas juntamente com o algoritmo MostUsed.
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Kanj, Matthieu. "Intelligent supervision of flexible optical networks." Thesis, Rennes 1, 2016. http://www.theses.fr/2016REN1S138/document.
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Les réseaux optiques dynamiques et flexibles font partie des scénarios d'évolution des réseaux de transport optique. Ceux-ci formeront la base de la nouvelle génération des réseaux optiques de demain et permettront le déploiement efficace des services tel que le Cloud Computing. Cette évolution est destinée à apporter flexibilité et automatisation à la couche optique, mais s'accompagne d'une complexité supplémentaire, notamment au niveau de la gestion et de la commande de cette toute nouvelle génération de réseau. Jusqu'à récemment, les protocoles de routage et de signalisation normalisés ont pris en compte plusieurs paramètres physiques tels que l'information spectrale de la bande passante, le format de modulation, et la régénération optique. Cependant, d'autres paramètres sont encore nécessaires (par exemple, les puissances optiques des liens, le gain des amplificateurs) afin de faire fonctionner efficacement de grands réseaux. Dans ce contexte, il y a un besoin d'étudier les réseaux optiques existants ainsi que les différentes méthodes de prise en compte de la couche photonique dans le plan de contrôle. Le but est d'avoir un réseau optique automatique, flexible et programmable, mais surtout efficace de point de vue économique et opérationnel. L'utilisation de la technologie à grille flexible a un impact sur les réseaux optiques existants, où presque tous les équipements devront être remplacés, ce qui entraînera un coût additionnel pour les opérateurs. Dans ce travail, nous étudions les réseaux optiques actuels et évaluons l'impact de la flexibilité sur les infrastructures existantes. Ensuite, nous identifions plusieurs paramètres optiques à contrôler et proposons des extensions protocolaires afin d'intégrer ces paramètres dans un plan de contrôle GMPLS. De plus, nous développons les algorithmes de routage et de signalisation qui permettent la mise en œuvre d'un plan de contrôle efficace qui répond au besoin de la flexibilité. Enfin, l'ensemble de nos propositions et de nos solutions sont évaluées sur plusieurs topologies réseaux avec des modèles de trafic différents dans le but de valider leur pertinence<br>Dynamic and flexible optical networks are among the evolution scenarios of the optical transport networks. These form the basis of the new generation of optical networks of tomorrow and enable the effective deployment of services such as cloud computing. This evolution is intended to provide flexibility and automation to the optical layer. However, it results in additional complexity, particularly in terms of the management and control of this new network generation. Until recently, the standardized routing and signaling protocols have been taking into account several optical parameters like the spectral bandwidth information, modulation format, and optical regeneration. However, other parameters (e.g., link optical powers, gain of optical amplifiers) are still required in order to efficiently operate large optical networks. In this context, there is a need to study the existing optical networks and the different integration methods of the photonic layer in a control plane. The goal is to get an automatic optical network that is flexible, programmable, and at the same time efficient from an economical and operational perspective. The use of flexible grid technology has an impact on existing optical networks, where almost all the equipment must be replaced, resulting in an additional cost to network operators. In this work, we study the current optical networks and evaluate the impact of flexibility on the existing infrastructures. Then, we identify several physical parameters to be controlled and propose protocol extensions in order to integrate these parameters in the GMPLS control plane. In addition, we develop the routing and signaling algorithms that allow the implementation of an efficient control plane that addresses the need for flexibility. Finally, the set of our proposals and solutions are evaluated on multiple network topologies with different traffic patterns in order to validate their relevance
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Palkopoulou, Eleni. "Homing-Architekturen für Multi-Layer Netze: Netzkosten-Optimierung und Leistungsbewertung." Doctoral thesis, Universitätsbibliothek Chemnitz, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-101633.
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Die schichtenübergreifende Steuerung von Multi-Layer Netzen ermöglicht die Realisierung fortgeschrittener Netzarchitekturen sowie neuartiger Konzepte zur Steigerung der Ausfallsicherheit. Gegenstand dieser Arbeit ist ein neues ressourcensparendes Konzept zur Kompensation von Core-Router-Ausfallen in IP-Netzen. Core-Router-Ausfälle führen zur Abkopplung der an Ihnen angeschlossenen Zugangsrouter vom Netz. Daher werden die Zugangsrouter üblicherweise mit jeweils zwei oder mehreren verschiedenen Core-Routern verbunden (engl.: dual homing) was jedoch eine Verdoppelung der Anschlusskapazität im IP Netz bedingt. Bei dem neuen Verfahren - Dual Homing mit gemeinsam genutzten Router-Ersatzressourcen (engl.: dual homing with shared backup router resources, DH-SBRR) - erfolgt die Zugangsrouter-Anbindung zum einen zu einem Core-Router des IP-Netzes und zum anderen zu einem Netzelement der darunterliegenden Transportschicht. Damit lassen sich Router-Ersatzressourcen, die im IP-Netz an beliebigen Stellen vorgehalten werden können, uber das Transportnetz an die Stelle eines ausgefallenen Core-Routers schalten. Die Steuerung dieser Ersatzschaltung geschieht über eine schichten übergreifende, d.h. das Transportnetz- und IP-Netz umfassende Control-Plane - beispielsweise auf Basis von GMPLS. Da beim Umschalten der Routerressourcen auch aktuelle Zustände (bspw. Routing-Tabellen) auf die Router-Ersatzressourcen mit übertragen werden müssen, beinhaltet das neue Verfahren auch Konzepte zur Router-Virtualisierung. Zum Vergleich und zur Bewertung der Leistungsfähigkeit des neuen DH-SBRR Verfahrens werden in der Arbeit verschiedene Zugangsrouter-Homing-Varianten hinsichtlich Netz-Kosten, Netz-Verfügbarkeit, Recovery-Zeit und Netz-Energieverbrauch gegenübergestellt. Als Multi-Layer Netzszenarien werden zum einen IP über WDM und zum anderen IP über OTN (ODU) betrachtet. Zur Bestimmung der minimalen Netz-Kosten ist ein generisches Multi-Layer Netzoptimierungsmodell entwickelt worden, welches bei unterschiedlichen Homing-Architekturen angewendet werden kann. Neben dem Optimierungsmodell zur Netzkostenminimierung wird auch eine Modellvariante zur Minimierung des Energieverbrauchs vorgestellt. Um die Rechenzeit für die Lösung der Optimierungsprobleme zu verringern und damit auch größere Netzszenarien untersuchen zu können bedarf es heuristischer Lösungsverfahren. Im Rahmen der Arbeit ist daher eine neue speziell auf die Multilayer-Optimierungsprobleme zugeschnittene Lösungsheuristik entwickelt worden. Aus der Netzkosten-Optimierung ergibt sich, dass durch den Einsatz von DH-SBBR signifikante Kosteneinsparungen im Vergleich zu herkömmlichen Homing-Architekturen realisiert werden können. Änderungen der Verkehrslast, der Kosten der IP-Netzelemente oder der Netztopologie haben keinen signifikanten Einfluss auf dieses Ergebnis. Neben dem Kosten- und Energieeinsparungspotential sind auch die Auswirkungen auf die Netz-Verfügbarkeit und die Recovery-Zeit untersucht worden. Für die Ende-zu-Ende Verfügbarkeit bei Anwendung der verschiedenen Homing-Architekturen Können untere Grenzwerte angegeben werden. Zur Bestimmung der Recovery-Zeit bei Einsatz von DH-SBRR ist ein eigenes analytisches Berechnungsmodell entwickelt und evaluiert worden. Damit kann das DH-SBRR Verfahren zur Einhaltung vorgegebener Recovery-Zeiten (wie sie für bspw. Für bestimmte Dienste gefordert werden) entsprechend parametriert werden<br>The emergence of multi-layer networking capabilities opens the path for the development of advanced network architectures and resilience concepts. In this dissertation we propose a novel resource-efficient homing scheme: dual homing with shared backup router resources. The proposed scheme realizes shared router-level redundancy, enabled by the emergence of control plane architectures such as generalized multi-protocol label switching. Additionally, virtualization schemes complement the proposed architecture. Different homing architectures are examined and compared under the prism of cost, availability, recovery time and energy efficiency. Multiple network layers are considered in Internet protocol over wavelength division multiplexing as well as Internet protocol over optical data unit settings - leading to the development of multi-layer optimization techniques. A generic multi-layer network design mathematical model, which can be applied to different homing architecture considerations, is developed. The optimization objective can be adapted to either minimizing the cost for network equipment or the power consumption of the network. In order to address potential issues with regard to computational complexity, we develop a novel heuristic approach specifically targeting the proposed architecture. It is shown that significant cost savings can be achieved - even under extreme changes in the traffic demand volume, in the cost for different types of network equipment, as well as in the network topology characteristics. In order to evaluate occurring tradeoffs in terms of performance, we study the effects on availability and recovery time. We proceed to derive lower bounds on end-to-end availability for the different homing architectures. Additionally, an analytical recovery time model is developed and evaluated. We investigate how service-imposed maximum outage requirements have a direct effect on the setting of the proposed architecture
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Palkopoulou, Eleni. "Homing-Architekturen für Multi-Layer Netze: Netzkosten-Optimierung und Leistungsbewertung." Doctoral thesis, 2011. https://monarch.qucosa.de/id/qucosa%3A18770.
Full textAbstract:
Die schichtenübergreifende Steuerung von Multi-Layer Netzen ermöglicht die Realisierung fortgeschrittener Netzarchitekturen sowie neuartiger Konzepte zur Steigerung der Ausfallsicherheit. Gegenstand dieser Arbeit ist ein neues ressourcensparendes Konzept zur Kompensation von Core-Router-Ausfallen in IP-Netzen. Core-Router-Ausfälle führen zur Abkopplung der an Ihnen angeschlossenen Zugangsrouter vom Netz. Daher werden die Zugangsrouter üblicherweise mit jeweils zwei oder mehreren verschiedenen Core-Routern verbunden (engl.: dual homing) was jedoch eine Verdoppelung der Anschlusskapazität im IP Netz bedingt. Bei dem neuen Verfahren - Dual Homing mit gemeinsam genutzten Router-Ersatzressourcen (engl.: dual homing with shared backup router resources, DH-SBRR) - erfolgt die Zugangsrouter-Anbindung zum einen zu einem Core-Router des IP-Netzes und zum anderen zu einem Netzelement der darunterliegenden Transportschicht. Damit lassen sich Router-Ersatzressourcen, die im IP-Netz an beliebigen Stellen vorgehalten werden können, uber das Transportnetz an die Stelle eines ausgefallenen Core-Routers schalten. Die Steuerung dieser Ersatzschaltung geschieht über eine schichten übergreifende, d.h. das Transportnetz- und IP-Netz umfassende Control-Plane - beispielsweise auf Basis von GMPLS. Da beim Umschalten der Routerressourcen auch aktuelle Zustände (bspw. Routing-Tabellen) auf die Router-Ersatzressourcen mit übertragen werden müssen, beinhaltet das neue Verfahren auch Konzepte zur Router-Virtualisierung.
Zum Vergleich und zur Bewertung der Leistungsfähigkeit des neuen DH-SBRR Verfahrens werden in der Arbeit verschiedene Zugangsrouter-Homing-Varianten hinsichtlich Netz-Kosten, Netz-Verfügbarkeit, Recovery-Zeit und Netz-Energieverbrauch gegenübergestellt. Als Multi-Layer Netzszenarien werden zum einen IP über WDM und zum anderen IP über OTN (ODU) betrachtet.
Zur Bestimmung der minimalen Netz-Kosten ist ein generisches Multi-Layer Netzoptimierungsmodell entwickelt worden, welches bei unterschiedlichen Homing-Architekturen angewendet werden kann. Neben dem Optimierungsmodell zur Netzkostenminimierung wird auch eine Modellvariante zur Minimierung des Energieverbrauchs vorgestellt. Um die Rechenzeit für die Lösung der Optimierungsprobleme zu verringern und damit auch größere Netzszenarien untersuchen zu können bedarf es heuristischer Lösungsverfahren. Im Rahmen der Arbeit ist daher eine neue speziell auf die Multilayer-Optimierungsprobleme zugeschnittene Lösungsheuristik entwickelt worden.
Aus der Netzkosten-Optimierung ergibt sich, dass durch den Einsatz von DH-SBBR signifikante Kosteneinsparungen im Vergleich zu herkömmlichen Homing-Architekturen realisiert werden können. Änderungen der Verkehrslast, der Kosten der IP-Netzelemente oder der Netztopologie haben keinen signifikanten Einfluss auf dieses Ergebnis.
Neben dem Kosten- und Energieeinsparungspotential sind auch die Auswirkungen auf die Netz-Verfügbarkeit und die Recovery-Zeit untersucht worden. Für die Ende-zu-Ende Verfügbarkeit bei Anwendung der verschiedenen Homing-Architekturen Können untere Grenzwerte angegeben werden. Zur Bestimmung der Recovery-Zeit bei Einsatz von DH-SBRR ist ein eigenes analytisches Berechnungsmodell entwickelt und evaluiert worden. Damit kann das DH-SBRR Verfahren zur Einhaltung vorgegebener Recovery-Zeiten (wie sie für bspw. Für bestimmte Dienste gefordert werden) entsprechend parametriert werden.<br>The emergence of multi-layer networking capabilities opens the path for the development of advanced network architectures and resilience concepts. In this dissertation we propose a novel resource-efficient homing scheme: dual homing with shared backup router resources. The proposed scheme realizes shared router-level redundancy, enabled by the emergence of control plane architectures such as generalized multi-protocol label switching. Additionally, virtualization schemes complement the proposed architecture. Different homing architectures are examined and compared under the prism of cost, availability, recovery time and energy efficiency. Multiple network layers are considered in Internet protocol over wavelength division multiplexing as well as Internet protocol over optical data unit settings - leading to the development of multi-layer optimization techniques.
A generic multi-layer network design mathematical model, which can be applied to different homing architecture considerations, is developed. The optimization objective can be adapted to either minimizing the cost for network equipment or the power consumption of the network. In order to address potential issues with regard to computational complexity, we develop a novel heuristic approach specifically targeting the proposed architecture. It is shown that significant cost savings can be achieved - even under extreme changes in the traffic demand volume, in the cost for different types of network equipment, as well as in the network topology characteristics.
In order to evaluate occurring tradeoffs in terms of performance, we study the effects on availability and recovery time. We proceed to derive lower bounds on end-to-end availability for the different homing architectures. Additionally, an analytical recovery time model is developed and evaluated. We investigate how service-imposed maximum outage requirements have a direct effect on the setting of the proposed architecture.
Book chapters on the topic "Generalized Multiprotocol Label Switching (GMPLS)"
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"GMPLS (Generalized Multiprotocol Label Switching)." In Optical Science and Engineering. CRC Press, 2005. http://dx.doi.org/10.1201/9781420027785.ch8.
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Medeiros, M. C. R., and N. S. C. Correia. "Survivability Mechanisms of Generalized Multiprotocol Label Switching." In Encyclopedia of Internet Technologies and Applications. IGI Global, 2008. http://dx.doi.org/10.4018/978-1-59140-993-9.ch083.
Full textAbstract:
Internet protocol (IP) over optical (IP-over-optical) networks is the widely accepted solution to meet the ever increasing demands of IP traffic. In an IP-over-optical network, the IP routers are attached to an optical core network, composed by optical cross-connects (OXC) that are interconnected by dynamically established optical wavelength channels called lighpaths (Rajagopalan, Pendarakis, Saha, Ramamoorthy, & Bala, 2000). To control such lightpaths in a dynamic, efficient, and realtime manner, generalized multiprotocol label switching (GMPLS) based control plane has been proposed by the Internet engineering task force (IETF) in the RFC 3945 edited by Mannie (2003).
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Datta, Debasish. "Optical Network Control and Management." In Optical Networks. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780198834229.003.0012.
Full textAbstract:
The task of network control and management is generally realized in two logical planes – control and management – which collaboratively operate to ensure smooth, secure, and survivable traffic flow in the data plane of the network. Some of the functionalities are realized in the control plane, needing real-time execution, such as recovery from network failures, and network reconfiguration due to traffic variation. Other functionalities deal with performance monitoring, configuration management, network security, accounting and billing etc., which are less time-sensitive and are addressed by the management plane. We first discuss the philosophy of multiple-layer abstraction of telecommunication networks, including control, management, and data planes, and then describe various network control and management techniques used in optical networks: operation, administration, and management (OAM) in SONET, generalized multiprotocol label switching (GMPLS), automatically switched optical network (ASON), and software-defined optical networking (SDON) in WDM networks. (141 words)
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Farrel, Adrian, and Igor Bryskin. "Multiprotocol Label Switching." In GMPLS. Elsevier, 2006. http://dx.doi.org/10.1016/b978-012088422-3/50003-4.
Full textConference papers on the topic "Generalized Multiprotocol Label Switching (GMPLS)"
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Goel, Sandeep, Ranjit Kaur, and Amit Wason. "Blocking performance in generalized multiprotocol label switching networks." In AGRIVOLTAICS2021 CONFERENCE: Connecting Agrivoltaics Worldwide. AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0105757.
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Reddy, Murla Bhumi, Jaisingh Tangaraj, and Vishnu Priye. "Multiservice Provisioning on Generalized Multiprotocol Label Switching Optical Core Networks." In 2019 International Conference on Wireless Communications Signal Processing and Networking (WiSPNET). IEEE, 2019. http://dx.doi.org/10.1109/wispnet45539.2019.9032869.
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Vinolee, R., and Vidhyacharan Bhaskar. "Multicast traffic with routing and reservations in generalized multiprotocol label switching." In 2013 International Conference on Communications and Signal Processing (ICCSP). IEEE, 2013. http://dx.doi.org/10.1109/iccsp.2013.6577143.
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Papadimitriou, Dimitri, Bela Berde, Ricardo Martinez, Javier Ordas, Remi Theillaud, and Sofie Verbrugge. "Generalized Multi-Protocol Label Switching (GMPLS) Unified Control Plane Validation." In 2006 IEEE International Conference on Communications. IEEE, 2006. http://dx.doi.org/10.1109/icc.2006.255190.
Full textReports on the topic "Generalized Multiprotocol Label Switching (GMPLS)"
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Fedyk, D., L. Berger, and L. Andersson. Generalized Multiprotocol Label Switching (GMPLS) Ethernet Label Switching Architecture and Framework. RFC Editor, 2010. http://dx.doi.org/10.17487/rfc5828.
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Nadeau, T., and A. Farrel, eds. Generalized Multiprotocol Label Switching (GMPLS) Label Switching Router (LSR) Management Information Base. RFC Editor, 2007. http://dx.doi.org/10.17487/rfc4803.
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Farrel, A. Generalized Multiprotocol Label Switching (GMPLS) Traffic Engineering Management Information Base. Edited by T. Nadeau. RFC Editor, 2007. http://dx.doi.org/10.17487/rfc4802.
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Shiomoto, K., R. Papneja, and R. Rabbat. Use of Addresses in Generalized Multiprotocol Label Switching (GMPLS) Networks. RFC Editor, 2007. http://dx.doi.org/10.17487/rfc4990.
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Ayyangar, A., K. Kompella, and A. Farrel. Label Switched Path Stitching with Generalized Multiprotocol Label Switching Traffic Engineering (GMPLS TE). RFC Editor, 2008. http://dx.doi.org/10.17487/rfc5150.
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Nadeau, T., and A. Farrel, eds. Definitions of Textual Conventions for Generalized Multiprotocol Label Switching (GMPLS) Management. RFC Editor, 2007. http://dx.doi.org/10.17487/rfc4801.
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Andersson, L., and A. Farrel, eds. Change Process for Multiprotocol Label Switching (MPLS) and Generalized MPLS (GMPLS) Protocols and Procedures. RFC Editor, 2007. http://dx.doi.org/10.17487/rfc4929.
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Fedyk, D., H. Shah, N. Bitar, and A. Takacs. Generalized Multiprotocol Label Switching (GMPLS) Control of Ethernet Provider Backbone Traffic Engineering (PBB-TE). RFC Editor, 2011. http://dx.doi.org/10.17487/rfc6060.
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Caviglia, D., D. Bramanti, D. Li, and D. McDysan. Requirements for the Conversion between Permanent Connections and Switched Connections in a Generalized Multiprotocol Label Switching (GMPLS) Network. RFC Editor, 2009. http://dx.doi.org/10.17487/rfc5493.
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Swallow, G., J. Drake, H. Ishimatsu, and Y. Rekhter. Generalized Multiprotocol Label Switching (GMPLS) User-Network Interface (UNI): Resource ReserVation Protocol-Traffic Engineering (RSVP-TE) Support for the Overlay Model. RFC Editor, 2005. http://dx.doi.org/10.17487/rfc4208.
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