IPoDWDM

IP over DWDM (IPoDWDM) is a technology used in telecommunications networks to integrate IP routers and network switches in the OTN (Optical Transport Network). A true IPoDWDM solution is implemented only when the IP Routers and Switches support ITU-T G.709.[1] In this way IP devices can monitor the optical path and implement the transport functionality as FEC (Forward Error Correction) specified by ITU-T G.709/Y.1331[1] or Super FEC functionality defined in ITU-T G.975.1.[2]

Benefits

This approach saves network components including shelves, processors, interfaces cards and hence it permits to reduce the power consumption, OPEX (Operational expenditure) and CAPEX (capital expenditure). This approach brings also a simplification of the network, eliminating the SDH/SONET intermediate layer.[3]

Multivendors

A DWDM network can be implemented using different vendor technology from the IP devices as long as they support alien wavelength transmission specified by ITU-T G.698.2.[4][5]

References
  1. "Interfaces for Optical Transport Network (OTN)”, ITU-T G.709/Y.1331
  2. "Forward error correction for high bit-rate DWDM submarine systems", ITU-T G.975.1
  3. Virgilio Puglia, Olga Zadedyurina, “optical transport networks: from all-optical to digital”, IEEE,31 August 2009 ISBN 978-92-61-12891-3
  4. D. Ventorini, E. Moura, L. Paraschis, O. Gerstel, M. Silva, K. Wollenweber, A.J. Silverio, P.P. Henrique, L.A.C. Silva "Demonstration and evaluation of IP-over-DWDM networking as "alien-wavelength" over existing carrier DWDM infrastructure", Optical Fiber communication/ National Fiber Optic Engineers Conference, Issue , 24–28 February 2008 Page(s):1 – 6
  5. Amplified multichannel DWDM applications with single channel optical interfaces", ITU-T G.698.2


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