An Overview of the State of the Art and Future Trends in GMPLS Controlled Optical Transport Networks
Jaume Comellas and Gabriel Junyent
Affiliation: UniversitatPolitecnica de Catalunya UPC Campus Nord D5, Jordi Girona 1, 08034 Barcelona, Spain.
Keywords: ASON, control plane, future internet, GMPLS, IETF, IP, MPLS, multi-layer, network resiliency, optical switching,
path computation element, routing, SDH, signaling, traffic engineering, transport network, wavelength selective switch
In this article we present a short survey of representative milestones achieved during last years on the control
and managementof optical transport networks, and discuss their main characteristics and potential impact on the future.It
is worth noting that this survey does not try to enumerate all the existing research topics and patents. Instead, it focuses on
a representative subset and tries to relate them to a few important ongoing research topics. Concerning patents, some
inventions from important companies such as Nippon Telegraph and Telephone Corp., Futurewei Technologies, Inc.,
Hitachi Ltd., Huawei Technologies Co., or Tellabs Operations Inc. are reviewed. As deployment of these advanced
networks seems to be imminent, all of these companies show a great interest in being well positioned. Finally, selected
still open research issues are also introduced and expected near term contributions are devised.
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