Patent ID: 8189610
Filing Date: 2012-05-29
Classification: H04L

Abstract:
1. A method for computing a recursive path in a multi-layer transport network, the method comprising: receiving a path computation request for a transmission service of an N layer in the multi-layer transport network including at least two layers; searching a traffic engineering (TE) link resource available in an N-1 layer and computing a path of the TE link available section when the TE link resource of the N layer required for computing the computation-requested path is insufficient; and requesting computation of a path using inter-layer switching available nodes present in a TE link unavailable section of the N-1 layer as an origination node and a destination node when there is the TE link-unavailable section in the N-1 layer, wherein a path computation of a next lower layer and a path computation request are repeatedly conducted recursively until when all the path computations included in the N layer path computation request is completed.