Patent ID: 9025594
Filing Date: 2015-05-05
Classification: H04J

Abstract:
1. A system for multiplexing a plurality of Low-Order (LO) optical channel data unit (ODUj) data words into a High-Order (HO) ODUk carrier in an Optical Transport Network (OTN) comprising: an apparatus configured to insert pad words among the plurality of LO ODUj data words, to justify the plurality of LO ODUj data words and to create expanded LO ODUj data words which together form an optical channel data tributary unit (ODTUjk); and a space-time-space (STS) switch including a permutation matrix for re-arranging and multiplexing bytes in the expanded LO ODUj data words into HO ODUk words in accordance with a tributary slot assignment for a selected LO ODUj of the HO ODUk carrier; wherein the STS switch comprises: a plurality of ingress multiplexers and a plurality of egress multiplexers implementing space stages of the STS switch; and a plurality of random access memories (RAMs) implementing a time stage of the STS switch, the RAMs configured to control the plurality of ingress multiplexers and the plurality of egress multiplexers.