US 9,813,333 B2
Using PCE as SDN controller
Qianglin Quintin Zhao, Boxborough, MA (US); Katherine Zhao, San Jose, CA (US); and Bisong Tao, San Jose, CA (US)
Assigned to FUTUREWEI TECHNOLOGIES, INC., Plano, TX (US)
Filed by Futurewei Technologies, Inc., Plano, TX (US)
Filed on Aug. 17, 2016, as Appl. No. 15/239,654.
Application 15/239,654 is a continuation of application No. 14/511,591, filed on Oct. 10, 2014, granted, now 9,450,864.
Claims priority of provisional application 61/889,978, filed on Oct. 11, 2013.
Prior Publication US 2016/0359735 A1, Dec. 8, 2016
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 12/28 (2006.01); H04L 12/723 (2013.01); H04L 12/717 (2013.01); H04L 12/759 (2013.01)
CPC H04L 45/50 (2013.01) [H04L 45/028 (2013.01); H04L 45/42 (2013.01); H04L 45/507 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A Path Computation Element (PCE) comprising:
a receiver configured to receive a path computation request from a path computation client (PCC), the path computation request requesting computation for a first path from a head end node to a tail end node, wherein the PCE is a child PCE positioned in a first domain, and wherein the head end node is positioned in the first domain and the tail end node is positioned in a second domain;
a processor coupled to the receiver and configured to:
forward the path computation request to a parent PCE responsible for computing the first path across the first domain and the second domain;
receive a path computation response from the parent PCE indicating domains that the first path traverses;
compute a second path within the first domain based on the path computation response from the parent PCE, wherein the second path is a portion of the first path; and
assign a first Multiprotocol Label Switching (MPLS) label for a Software Defined Network (SDN) compatible node in the second path, wherein the first MPLS label is associated with a label switched path (LSP) that traverses each node in the second path; and
a transmitter coupled to the processor and configured to transmit the first MPLS label directly to the SDN compatible node via PCE protocol (PCEP).