Quality of Service Aware Call Admission Control in Cell Based Multi-Service Photonic Network

The article tackles the problem of quality of service assurance in photonic networks. The idea of multi-service photonic network model with the coexistence of optical circuit and packet switching mechanisms and cell communication is used as a basis for service differentiation in the optical domain. Cell loss ratio as a key performance indicator determines the required optical switching mechanism. Service provisioning is performed using call admission control mechanism with real-time cell loss ratio estimation procedure. Service blocking probability calculation utilizes discrete event simulation of service provision and teardown requests applied to core network topology from COST 266 project. Three simulation scenarios are included in the analysis – pure optical packet switching network, and coexistence of optical packet and circuit switching with and without possibility of communication redirection between the switching mechanisms. Simulation scenarios are additionally altered with the cell loss ratio constraint and number of delay lines

Quality of Service Aware Call Admission Control in Cell Based Multi-Service Photonic Network

The article tackles the problem of quality of service assurance in photonic networks. The idea of multi-servicephotonic network model with the coexistence of optical circuit and packet switching mechanisms and cell communication is used as a basis for service differentiation in the optical domain. Cell loss ratio as a key performance indicator determines the required optical switching mechanism. Service provisioning is performed using call admission control mechanism with real-time cell loss ratio estimation procedure. Service blocking probability calculation utilizes discrete event simulation of service provision and teardown requests applied to core network topology from COST 266 project. Three simulation scenarios are included in the analysis – pure optical packet switching network, and coexistence of optical packet and circuit switching with and without possibility of communication redirection between the switching mechanisms. Simulation scenarios are additionally altered with the cell loss ratio constraint and number of delay lines

Architecture and implementation of a topological information and traffic engineering service to RWA systems

Orientador: Mauricio Ferreira MagalhãesDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de ComputaçãoResumo: Redes totalmente ópticas (fotônicas) controladas por GMPLS (Generalized MultiProtocol Label Switching) são a promessa para lidar com o crescente volume de tráfego IP. Os protocolos de sinalização e roteamento GMPLS, principalmente OSPF (Open Shortest Path First) e RSVP (Resource ReSerVation Protocol), trabalham de tal modo que o cálculo da rota para circuitos ópticos não considera a disponibilidade de comprimentos de onda (labels). Esta solução não é ótima em termos do uso de recursos de rede e da probabilidade de bloqueio de novos circuitos. Para aprimorar este quadro, algoritmos RWA (Routing and Wavelength Assignment) mais eficientes poderiam ser usados para calcular a rota e o comprimento de onda simultaneamente. Estes algoritmos RWA necessitam conhecer a topologia óptica de um modo ainda não descrito pelas atuais especificações do protocolo OSPF. Esta dissertação propõe extensões de Engenharia de Tráfego para o protocolo OSPF para permitir que o plano de controle GMPLS se beneficie do uso de algoritmos RWA mais eficientes. Um protótipo foi desenvolvido e instalado em uma rede óptica emulada para verificar a praticabilidade da solução proposta baseado na sobrecarga de tráfego gerado no plano de controleAbstract: GMPLS-controlled all-optical networks are the promise to handle the increasing volume of IP traffic. The GMPLS routing and signaling protocols, mainly OSPF and RSVP, work in such a way that the route calculation for optical circuits does not take into account the wavelength (label) availability. This is not optimal in terms of network resources usage and blocking probability of new circuits. To deal with this scenario, more efficient RWA algorithms could be used to calculate the route and the wavelength assignment at one time. These RWA engines need to know the optical topology in a way that is not described by current OSPF standards. This dissertation proposes Traffic Engineering extensions to the OSPF protocol to enable the GMPLS control plane to take advantage of the most effective RWA classes. A prototype was developed and deployed in an optical-emulated copper-based network to verify its feasibility based on the bandwidth overhead generated in the control planeMestradoEngenharia de ComputaçãoMestre em Engenharia Elétric

An Implementation Of An Ospf-te To Support Gmpls-controlled All-optical Wdm Networks

GMPLS-controlled all-optical networks are the promise to handle the increasing volume of IP traffic. The GMPLS routing and signaling protocols, mainly OSPF and RSVP, work in such a way that the route calculation for optical circuits does not take into account the label (lambda) availability. This is not optimal in terms of network usage and blocking probability of new circuits. To deal with this scenario, more efficient RWA algorithms could be used to calculate the route and the wavelength assignment at one time. These RWA engines need to know the optical topology in a way that is not described by the current OSPF standards. This paper proposes Traffic Engineering extensions to the OSPF protocol to enable the GMPLS control plane to take advantage of the most effective RWA classes. A prototype was developed and deployed in an optical-simulated copper-based network to verify its feasibility based on the bandwidth overhead generated in the control plane. © 2006 IEEE.300305Kontak, M., Sobar, D., IP based optical control plane (2003) Proceedings of the 7th International Telecommunications, 2, pp. 427-433. , JuneMannie, E., (2004) Generalized Multi-Protocol Label Switching (GMPLS) Architecture, , http://www.ietf.org/rfc/rfc3945.txt, RFC 3945 Proposed Standard, Oct, Online, AvailableLang, J., (2005) Link Management Protocol (LMP), , http://www.ietf.org/rfc/rfc4204.txt, RFC 4204 Proposed Standard, Oct, Online, AvailableKompella, K., Rekhter, Y., (2005) OSPF Extensions in Support of Generalized Multi-Protocol Label Switching (GMPLS), , http://www.ietf.org/rfc/rfc4203.txt, RFC 4203 Proposed Standard, Oct, Online, AvailableL. Berger, Generalized Multi-Protocol Label Switching (GMPLS) Signaling Resource ReserVation Protocol-Traffic Engineering (RSVPTE) Extensions, RFC 3473 (Proposed Standard), Jan. 2003, atualizada pelas RFCs 4003, 4201, 4420. [Online]. Available: http://www.ietf.org/rfc/rfc3473.txtStrand, J., Chiu, A.L., Tkach, R., Issues for routing in the optical layer (2001) IEEE Commun. Mag, 39 (2), pp. 81-87. , FebruaryYamanaka, N., Katayama, M., Shiomoto, K., Oki, E., Matsuura, N., Multi-layer traffic engineering in photonic-GMPLS-router networks (2002) Global Telecommunications Conference, 3, pp. 2731-2735. , NovemberYin, Y., Kuo, G.S., An improved OSPF-TE in GMPLS-based optical networks (2005) Workshop on High Performance Switching and Routing, pp. 241-245. , MayRamaswami, R., Sivarajan, K., Routing and wavelength assignment in all-optical networks (1995) IEEE/ACM Trans. Networking, 3 (5), pp. 489-500. , OctoberChlamtac, I., Ganz, A., Karmi, G., Lightpath communications: An approach to high-bandwidth optical WAN's (1992) IEEE Trans. Commun, 40 (7), pp. 1171-1182. , JulyChlamtac, I., Farago, A., Zhang, T., Lightpath (wavelength) routing in large WDM networks (1996) IEEE Trans. Commun, 14 (5), pp. 909-913. , JuneSubramaniam, S., Barry, R., Wavelength assignment in fixed routing WDM networks (1997) IEEE Int'l Conf. Commun, pp. 411-415. , JunePavani, G.S., Waldman, H., Dynamic routing and wavelength assignment with power constraints (2004) Proceedings of the XXI Simpósio Brasileiro de Telecomunicações, , SeptemberYen, J., Finding the k shortest loopless paths in a network (1971) Management Science, 17 (11), pp. 712-716. , JulyQuagga Routing Suite, , http://www.quagga.net, June 2006, Online, AvailableYoon, M., Shin, J., Jeong, C., Jo, J., Kang, O., Kim, S., Optical-LSP Establishment and a QoS Maintenance Scheme Based on Differentiated Optical QoS Classes in OVPNs (2004) Photonic Network Communications, 7 (2), pp. 161-178. , MarchNetwork Protocol Analyzer, , http://www.ethereal.com, June 2006, Online, AvailableAlnuweiri, H.M., Wong, L.Y.K., Al-Khasib, T., Performance of new link state advertisement mechanisms in routing protocols with traffic engineering extensions (2004) IEEE Commun. Mag, 42 (5), pp. 151-162. , Ma