Patent Document ID: 9825845
Application ID: 14732198
Patent Flag: 1

Claim One:
1. A path computation method, comprising: performing by a Path Communication Element (PCE) device which includes at least a processor executing algorithms to configure the PCE device to further perform steps, comprising: receiving a path computation request message from a Path Computing Client (PCC), wherein the path computation request message includes data that defines a network type identifier and traffic parameter constraint conditions of a path required to be computed, and the network type identifier indicates a type of a corresponding network where the path required to be computed is located, wherein the network type identifier indicates that the corresponding network where the path required to be computed is located is at least one of: a Synchronous Digital Hierarchy (SDH) network, an Optical Transport Network (OTN) or an Ethernet network; computing the path in consideration of the network type identifier and the traffic parameter constraint conditions; and sending a path computation response message to the PCC, wherein the path computation response message includes data that defines the computed path, wherein the network type identifier indicates that the corresponding network where the path required to be computed is located is the OTN, and the traffic parameter constraint conditions comprise a signal type, a concatenation type, and a number of components; the path computation method further comprising: the PCE computing the path in the OTN according to the signal type, the concatenation type, and the number of components of the traffic parameter constraint conditions.