Undirected cross connects based on wavelength-selective switches

Abstract

Undirected cross connects are provided based on wavelength-selective switches A demand d={i, j} is routed over a path pbetween ports i and j in a multi-layer network based on one or more wavelength selective switches, by determining a middle layer node n in the multi-network for which there is a first path pbetween the port i and the middle layer node n and a second path pbetween the port j and the middle layer node n; identifying a node n', wherein the node n′ is a first node starting from port i that path pshares with path p; and concatenating the path pcomprised of a subpath p′of the first path pfrom the port i to the node n′ with a subpath of p′of the second path pfrom the node n′ to the port j. An undirected Cantor network is disclosed where the switch nodes are wavelength selective switches. An undirected Clos cross connect is also disclosed where one or more undirected switches are undirected Cantor networks having at least one wavelength selective switch.