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Metro Network Design Procedure

Metro Network Design Procedure. Herbert Haunstein, Bernd Bollenz. Inner Procedure. Metro Network Design - Outer. Evaluate - network topology - traffic demand - performance requirements.

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Metro Network Design Procedure

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  1. Metro Network Design Procedure Herbert Haunstein, Bernd Bollenz

  2. Inner Procedure Metro Network Design - Outer Evaluate - network topology - traffic demand - performance requirements It is assumed here, that the process is performed on a given network topology, i.e., given node locations, node spacing (incl. link loss, dispersion) Network segment specific, e.g., for the metro segment with various link loss parameters we assume to use a draft OSNR map to identify the critical paths. In general: critical path identification (5 disjoint shortest paths) is performed by setting the max. path length/OSNR so that 90% of all paths are covered. Evaluate node matrix to identify critical light paths:- longest / shortest path- maximum / minimum node count Predefine & update network parameters- data rate / channel count (depends on traffic demand)- FEC present(depends on distances / constraints, e.g. remove DCM ) For complex network segments the evaluation of all light paths might not be feasible Evaluate network performance(all possible / selected paths) Performance requirements fulfilled? No Yes Network design rules(e.g. modulation format, amplifier spacing, dispersion map, power map)

  3. From outer procedure To outer procedure Metro Network Design - Inner • Define & update set of components • EDFA • - Node design (OADM, equalization, …)- modulation format Set dispersion map Optimum dispersion map achieved? No Yes Set power map OSNR map- type of amplifier, amp. spacing Optimum power map achieved (OSNR maximised vs.non-linearities) No Yes Licht path requirements fulfilled?(Q factor) No Yes

  4. Evaluate - network topology - traffic demand - performance requirements • Define & update set of components • EDFA • - Node design (OADM, equalization, …)- modulation format Evaluate node matrix to identify critical light paths:- longest / shortest path- maximum / minimum node count Set dispersion map Predefine & update network parameters- data rate / channel count (depends on traffic demand)- FEC present(depends on distances / constraints, e.g. remove DCM ) Optimum dispersion map achieved? No Yes Set power map OSNR map- type of amplifier, amp. spacing Inner Procedure Optimum power map achieved (OSNR maximised vs.non-linearities) Evaluate network performance(all possible / selected paths) No Performance requirements fulfilled? Yes No Licht path requirements fulfilled?(Q factor) No Yes Network design rules(e.g. modulation format, amplifier spacing, dispersion map, power map) Yes Metro Network Design – Complete Picture

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