Resumes
Resumes
Heidi Ou Phones & Addresses
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Los Gatos, CA
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San Jose, CA
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13719 Saratoga Vista Ave, Saratoga, CA 95070 (408) 834-0762
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Sunnyvale, CA
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Milpitas, CA
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Santa Clara, CA
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13719 Saratoga Vista Ave, Saratoga, CA 95070
Work
Position:
Professional/Technical
Education
Degree:
Graduate or professional degree
Emails
Publications
Us Patents
Method And Apparatus For Flooding Link State Packets To Achieve Faster Convergence
View pageUS Patent:
7467226, Dec 16, 2008
Filed:
Oct 5, 2004
Appl. No.:
10/959707
Inventors:
Steven V. Luong - San Jose CA, US
Heidi H. Ou - San Jose CA, US
Gerald Redwine - Raleigh NC, US
James L. Ng - Mebane NC, US
Kevin M. Eckhardt - Durham NC, US
Scott R. Sturgess - Grimbergen, BE
Steven Moore - Holly Springs NC, US
Heidi H. Ou - San Jose CA, US
Gerald Redwine - Raleigh NC, US
James L. Ng - Mebane NC, US
Kevin M. Eckhardt - Durham NC, US
Scott R. Sturgess - Grimbergen, BE
Steven Moore - Holly Springs NC, US
Assignee:
Cisco Technology, Inc. - San Jose CA
International Classification:
H04L 12/56
US Classification:
709238, 709227, 709239, 370238, 370254
Abstract:
Disclosed are methods and apparatus for flooding link state packets or packet data units (LSP's) from a first node to one other LSP receiving node, where the LSP's are flooded in an order that is related to relative costs of various paths emanating from the first node. That is, the first node sends its own LSP first since the first node has no cost relative to itself. The first node then sends other LSP's that are associated with a plurality of other LSP sending nodes that have previously flooded their LSP's to the first node, and these other LSP's are sent by the first node to the other LSP receiving node in an order related to the relative costs associated with the paths from the first node to each of the other LSP sending nodes which had previously sent the other LSP's to the first node.
Method And System For Transmitting Lsp Fragments
View pageUS Patent:
7656856, Feb 2, 2010
Filed:
Apr 28, 2005
Appl. No.:
11/116493
Inventors:
Heidi Ou - Saratoga CA, US
Steven V. Luong - San Jose CA, US
Rena Whei-Ming Yang - Sunnyvale CA, US
Steven V. Luong - San Jose CA, US
Rena Whei-Ming Yang - Sunnyvale CA, US
Assignee:
Cisco Technology, Inc. - San Jose CA
International Classification:
H04L 12/28
US Classification:
370351, 370216, 370238, 370254, 370256, 709238, 709242
Abstract:
Methods, systems, and apparatuses for transmitting link state packet (LSP) through a network are provided. The method includes dividing the LSP into LSP fragments having respective fragment numbers, transmitting the LSP fragments repetitively through the network, identifying at least one LSP fragment that is updated while the LSP fragments are being transmitted, and retransmitting the identified LSP fragments. The transmitted updated LSP is used for processing the Shortest Path First algorithm to identify accurately the shortest path that can be used to establish communication in the network.
Method And Apparatus For Flooding Link State Packets To Achieve Faster Convergence
View pageUS Patent:
7805537, Sep 28, 2010
Filed:
Dec 11, 2008
Appl. No.:
12/332713
Inventors:
Steven V. Luong - San Jose CA, US
Heidi H. Ou - San Jose CA, US
Gerald Redwine - Raleigh NC, US
James L. Ng - Mebane NC, US
Kevin M. Eckhardt - Durham NC, US
Scott R. Sturgess - Grimbergen, BE
Steven Moore - Holly Springs NC, US
Heidi H. Ou - San Jose CA, US
Gerald Redwine - Raleigh NC, US
James L. Ng - Mebane NC, US
Kevin M. Eckhardt - Durham NC, US
Scott R. Sturgess - Grimbergen, BE
Steven Moore - Holly Springs NC, US
Assignee:
Cisco Technology, Inc. - San Jose CA
International Classification:
H04L 12/56
US Classification:
709238, 709227, 709228, 370238
Abstract:
Disclosed are methods and apparatus for flooding link state packets or packet data units (LSP's) from a first node to one other LSP receiving node, where the LSP's are flooded in an order that is related to relative costs of various paths emanating from the first node. That is, the first node sends its own LSP first since the first node has no cost relative to itself. The first node then sends other LSP's that are associated with a plurality of other LSP sending nodes that have previously flooded their LSP's to the first node. These other LSP's are sent by the first node to the other LSP receiving node in an order related to the relative costs associated with the paths from the first node to each of the other LSP sending nodes which had previously sent the other LSP's to the first node.
Method And System To Restart Is-Is When Lsp Wraps
View pageUS Patent:
8072907, Dec 6, 2011
Filed:
Apr 28, 2005
Appl. No.:
11/116474
Inventors:
Steven V. Luong - San Jose CA, US
Rena Whei-Ming Yang - Sunnyvale CA, US
Heidi Ou - Saratoga CA, US
Rena Whei-Ming Yang - Sunnyvale CA, US
Heidi Ou - Saratoga CA, US
Assignee:
Cisco Technolgy, Inc. - San Jose CA
International Classification:
H04L 12/28
H04L 12/56
H04J 3/24
H04L 12/56
H04J 3/24
US Classification:
370255, 370394, 370474
Abstract:
A method, system, apparatus and machine-readable medium for transmitting a packet through a network to convey network topology is provided. The method includes the step of generating at least one link state protocol data unit (LSP) with a first identifier until reaching a maximum sequence number in a sequence assigned to a network device, represented by the first identifier. The method further includes the step of modifying the first identifier to produce a second identifier. The method also includes the step of generating at least one LSP with the second identifier, and with a sequence number that is less than or equal to the maximum sequence number in the sequence. The system for transmitting a packet through a network, to convey network topology, comprises the means for performing the above-mentioned method steps.
Network Based Multicast Stream Duplication And Merging
View pageUS Patent:
8184628, May 22, 2012
Filed:
Aug 28, 2009
Appl. No.:
12/584008
Inventors:
Yiqun Cai - Cupertino CA, US
Toerless Eckert - Mountain View CA, US
Heidi Ou - Saratoga CA, US
Toerless Eckert - Mountain View CA, US
Heidi Ou - Saratoga CA, US
Assignee:
Cisco Technology, Inc. - San Jose CA
International Classification:
H04L 12/28
US Classification:
370389, 370401
Abstract:
In one embodiment, a method includes receiving a join message from a receiver at a receiver edge router, the join message identifying a source and a group, and creating at least two forwarding trees for transmitting multicast data streams comprising duplicate data to the receiver edge router. The forwarding trees include a root at a source edge router in communication with the source, and different network paths. The method further includes receiving a packet from one of the forwarding trees and processing the received packet to determine if the packet is a duplicate of another packet received at the receiver edge router. If the packet is a duplicate packet, it is discarded. If the packet is not a duplicate, it is forwarded to the receiver. An apparatus is also disclosed.
System And Method For Providing A Path Avoidance Feature In A Network Environment
View pageUS Patent:
20110317695, Dec 29, 2011
Filed:
Jun 25, 2010
Appl. No.:
12/823753
Inventors:
Yiqun Cai - Cupertino CA, US
Heidi Ou - Saratoga CA, US
Heidi Ou - Saratoga CA, US
International Classification:
H04L 12/56
US Classification:
370390
Abstract:
A method is provided in one example and includes evaluating multiple paths in a network in order to execute a reverse path forwarding decision for multicast traffic associated with a source. The method may also include selecting a second network path based on a first network path previously been designated as a route for the multicast traffic associated with the source. The first network path and a second network path differ by at least one network element. The method further includes receiving at least one of a first data stream and a second data stream, wherein the first data stream is associated with the first network path and the second data stream is associated with the second network path.
Enhancing Mtrace To Detect Failure In Multicast Diverse Paths
View pageUS Patent:
20120051231, Mar 1, 2012
Filed:
Aug 31, 2010
Appl. No.:
12/873179
Inventors:
Heidi H. Ou - Saratoga CA, US
Assignee:
CISCO TECHNOLOGY, INC. - San Jose CA
International Classification:
H04L 12/26
US Classification:
370248
Abstract:
In one embodiment, a network device may receive an mtrace query, where the mtrace query identifies two or more multicast routing paths. The network device may generate two or more mtrace requests using at least a portion of information obtained from the mtrace query such that each of the two or more mtrace requests identifies a different one of the two or more multicast routing paths. The network device may send each of the two or more mtrace requests via a different one of the two or more multicast routing paths. The network device may then receive at least one response including information pertaining to the two or more multicast routing paths.
Optimizing Otv Multicast Traffic Flow For Site Local Receivers
View pageUS Patent:
20120201244, Aug 9, 2012
Filed:
Feb 4, 2011
Appl. No.:
13/021518
Inventors:
Heidi H. Ou - Saratoga CA, US
Richard William Bradford - Lancaster MA, US
Richard William Bradford - Lancaster MA, US
Assignee:
CISCO TECHNOLOGY, INC. - San Jose CA
International Classification:
H04L 12/56
US Classification:
370390
Abstract:
In one embodiment, a first Edge Device may join a multicast group via a multicast router, wherein the first Edge device is in a first site of a network and the multicast router is in a second site of the network. The first Edge Device may ascertain an existence of both a first multicast source in the first site of the network and a second multicast source in the second site of the network. The first Edge Device may select the first multicast source as a multicast source from which to receive multicast data for the multicast group. The first Edge Device may notify the second multicast source in the second site of the network that the first Edge Device is not interested in receiving multicast data for the multicast group from the second multicast source.