Path computation element protocol (PCEP) operations to support wavelength switched optical network routing, wavelength assignment, and impairment validation

摘要

An apparatus comprising a path computation element (PCE) configured for at least partial impairment aware routing and wavelength assignment (RWA) and to communicate with a path computation client (PCC) based on a PCE protocol (PCEP) that supports path routing, wavelength assignment (WA), and impairment validation (IV). The PCEP comprises at least one operation selected from the group consisting of a new RWA path request operation and a path re-optimization request operation. Also disclosed is a network component comprising at least one processor configured to implement a method comprising establishing a PCEP session with a PCC, receiving path computation information comprising RWA information and constraints from the PCC, and establishing impairment aware RWA (IA-RWA) based on the path computation information and a private impairment information for a vendor's equipment.

主权项

1. A method comprising:
receiving, by a path computation element (PCE), a Path Computation Element Protocol (PCEP) Path Computation Request (PCReq) Message from a path computation client (PCC) that includes one or more optical signal quality parameters to which all computed paths must conform, wherein if the PCReq message does not include a Bit Error Rate (BER) limit, and wherein if no BER limit information related to the path request is provisioned at the PCE, then the PCE returns an error specifying that a BER limit must be provided.