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)
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).