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A resilience-based comparative study between Optical Burst Switching and Optical Circuit Switching technologies
 

Summary: A resilience-based comparative study between Optical Burst
Switching and Optical Circuit Switching technologies
José Alberto Hernández, Javier Aracil, Víctor López
Networking Research Group, Universidad Autónoma de Madrid, Spain
Juan Fernández Palacios, Óscar González de Dios
Telefónica I+D, Madrid, Spain
Phone: (+34) 91 497 2268, Fax: (+34) 497 2235, e-mail: Jose.Hernandez@uam.es
ABSTRACT
Internet operators and ISP providers have traditionally designed network resources following an over-planning
policy, on attempts to maintain a desired grade of service and network availability, regardless of network
failures.
This work presents a comparative study of two resilience mechanisms in the design of optical networks either
based on Optical Burst Switching (OBS) or Optical Circuit Switching (OCS): the M:N protection scheme with
dedicated backup channels. It is further analysed and discussed the benefits and disadvantages of such
mechanism based on an analytical model.
Keywords: resilience mechanisms, M:N protection, OCS, OBS, Erlang-B, Erlang-C.
1. INTRODUCTION
The fall of prices in optical devices, together with the high capacity and low bit-error rates offered by fibre
optics, has made network operators and ISP providers consider optical DWDM networks as a promising future
backbone technology, and triggered accordingly a new research field in the design and engineer of optical-

  

Source: Rico, Javier Aracil - Departamento de Ingeniería Informática, Universidad Autonoma de Madrid

 

Collections: Computer Technologies and Information Sciences