Inventor
LI GUANGZHI
US41 patents
⚠️ This page may combine multiple inventors who share the name “LI GUANGZHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
AT & T IP II LP
9 patentsUS7859993B1Dec 28, 2010
Two-phase fast reroute with optimized traffic engineering
AT & T IP II LP55 citations96
US7652983B1Jan 26, 2010
Method for restoration and normalization in a mesh network
AT & T IP II LP40 citations90
US7974183B2Jul 5, 2011
Method for restoration and normalization in a mesh network
AT & T IP II LP7 citations84
US7769296B1Aug 3, 2010
Arrangement for reducing multiplexing and demultiplexing cost in ultra long haul (ULH) all-optical networks by minimizing number of required mux/demux groups
AT & T IP II LP7 citations70
US8374077B2Feb 12, 2013
Bandwidth management for MPLS fast rerouting
AT & T IP II LP3 citations63
US7688720B2Mar 30, 2010
Method for selecting a restoration path in a mesh network
AT & T IP II LP3 citations63
US7904571B1Mar 8, 2011
Method and apparatus for generating a set of aggregates
AT & T IP II LP5 citations55
US8780697B2Jul 15, 2014
Bandwidth management for MPLS fast rerouting
AT & T IP II LP0 citations52
US8824461B2Sep 2, 2014
Method and apparatus for providing a control plane across multiple optical network domains
AT & T IP II LP1 citations48
AT & T IP I LP
8 patentsUS10931567B2Feb 23, 2021
System and method for restoration in a multimedia IP network
AT & T IP I LP1 citations73
US10601731B2Mar 24, 2020
Broadcast services platform and methods for use therewith
AT & T IP I LP2 citations72
US9264344B2Feb 16, 2016
Method and apparatus for providing a route recommendation
AT & T IP I LP3 citations70
US7613135B2Nov 3, 2009
System and method for routing packet traffic
AT & T IP I LP4 citations63
US10447616B2Oct 15, 2019
Broadcast services platform and methods for use therewith
AT & T IP I LP1 citations62
US9979634B2May 22, 2018
System and method for restoration in a multimedia IP network
AT & T IP I LP0 citations52
US9503315B2Nov 22, 2016
System and method for restoration in a multimedia IP network
AT & T IP I LP0 citations52
US8897641B2Nov 25, 2014
Reachability matrices spanning multiple domains in an optical network
AT & T IP I LP1 citations49
LI GUANGZHI
6 patentsUS8515280B1Aug 20, 2013
Physically-diverse routing in heterogeneous optical networks
LI GUANGZHI21 citations90
US8208371B2Jun 26, 2012
Bandwidth management for MPLS fast rerouting
LI GUANGZHI12 citations84
US8260133B2Sep 4, 2012
Standby restoration signaling for optical networks
LI GUANGZHI11 citations83
US8989018B2Mar 24, 2015
Method and apparatus for providing a route recommendation
LI GUANGZHI4 citations69
US8665698B2Mar 4, 2014
System and method for restoration in a multimedia IP network
LI GUANGZHI1 citations62
US8687956B2Apr 1, 2014
Standby restoration signaling for optical networks
LI GUANGZHI2 citations61
AT & T CORP
4 patentsUS7406032B2Jul 29, 2008
Bandwidth management for MPLS fast rerouting
AT & T CORP61 citations98
US6982951B2Jan 3, 2006
Method for selecting a restoration path in a mesh network
AT & T CORP85 citations98
US7298700B1Nov 20, 2007
Method for unidirectional and bidirectional label switched path setup in a label switched network
AT & T CORP16 citations92
US7180852B1Feb 20, 2007
Method for selecting a restoration path in a mesh network
AT & T CORP33 citations92