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Oscar González de Dios, Telefónica Ramon Casellas , CTTC Fatai Zhang, Huawei Xihua Fu, ZTE

Framework for GMPLS based control of Flexi-grid DWDM networks draft-ogrcetal-ccamp-flexi-grid-fwk-02 CCAMP WG meeting , IETF 87. Oscar González de Dios, Telefónica Ramon Casellas , CTTC Fatai Zhang, Huawei Xihua Fu, ZTE Daniele Ceccarelli , Ericsson Iftekhar Hussain , Infinera.

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Oscar González de Dios, Telefónica Ramon Casellas , CTTC Fatai Zhang, Huawei Xihua Fu, ZTE

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  1. Framework for GMPLS based control of Flexi-grid DWDM networksdraft-ogrcetal-ccamp-flexi-grid-fwk-02CCAMP WG meeting, IETF 87 Oscar González de Dios, Telefónica Ramon Casellas, CTTC Fatai Zhang, Huawei Xihua Fu, ZTE Daniele Ceccarelli, Ericsson IftekharHussain, Infinera

  2. Feedback from joint ITU-T – CCAMP meeting • Joint ITU-T SG15 Q6 - IETF CCAMP meeting was held @ IETF 86 • Questions of the framework were discussed and answer by ITU-T • Q1.1 Relation between media layer and signal layer: • There is only one possible combination: Single Optical Tributary Signal (OTS) over Single Network media channel. • Term Optical Tributary Signal defined in new version of G.959 • “The optical signal that is placed within a network media channel for transport across optical network” • “may consist of a single modulated optical carrier or a group of modulated optical carriers or subcarriers” • Q1.2 Hierarchy in media layer • From the management and control point of view, a hierarchy of media channels is considered

  3. Feedback from joint ccamp-ITU-T meeting • Q.2 Attributes of link • All considered in the draft are OK • Q.3 resource allocation, different n,m allowed in path? • Aspect had not been debated yet ITU • During last ITU-T SG-15 meeting G.872 has been discussed and updated to allow for 0.5 in n and m • Framework will be aligned with the data plane (G.694.1) until ITU-T finds an agreement between G.694.1 and G.872 • Q.4 impact of signal characteristics on the link information • In an environment of only pre-qualified paths, no. • Otherwise, impairment aware path computation issues as in WSON apply. Follow the work in WSON.

  4. Changes in -03 version • Major clean-up and reorganization of the document • Sections merged and redundant text removed • Removed most editorial notes • Reflect feedback from joint ITU-T – CCAMP meeting • Include reference to latest ITU-T documents • First section describing Flexi-grid networks • Flexi-grid in the context of OTN, Terminology and Network Model • GMPLS applicability: • Section expanded. Focus: how to use GMPLS in flexi-grid networks. • Control plane requirements • 3 major areas: functional requirements, topology dissemination, routing and signaling. • Major work needed

  5. Next steps • Document is ready for WG adoption • Reflect updates of ITU-T data plane (e.g. G.872) • Work on requirements is needed • More feedback from WG!

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