Paul A Bottorff Deceased340 Blomquist St, Redwood City, CA 94063

6944163, Sep 13, 2005

Dec 19, 2000

09/739385

Paul A. Bottorff - Palo Alto CA, US
Norival R. Figueira - San Jose CA, US
David W. Martin - Stittsville, CA
Timothy J. Armstrong - Stittsville, CA
Bijan Raahemi - Nepean, CA

Nortel Networks Limited - St. Laurent

H04L012/56
H04J003/22

3703955, 370466, 370477, 370521, 370545, 375248

An Ethernet mapping enables high speed Ethernet data streams having a data rate of 10 Gb/s to be transported across a synchronous packet switched network fabric having a standard SONET OC-192 line rate of 9. 953280 Gbaud. The 10 Gb/s Ethernet data stream is compressed by removing interframe gaps between successive MAC frames to produce a compressed data stream, which is then mapped to a synchronous container. The synchronous container is then launched across the synchronous packet switched network fabric at a standard SONET OC-192 line rate of 9. 953280 Gbaud. The synchronous container is preferably provided as a stripped STS-192c frame having only A1 and A2 octets of the Transport Overhead (TOH). The compressed data stream is mapped directly to the synchronous container, starting at the first octet following the A1 and A2 octets, without first being inserted into a conventional STS-192c SPE, so that most of the space normally used for TOH and Path overhead (POH) within a conventional STS-192c frame is freed-up for carrying the compressed data stream. At a receiving interface, the compressed data stream is extracted from received synchronous containers and decompressed, by insertion of interframe gaps between successive MAC frames, to generate a recovered 10 Gb/s Ethernet data stream.

7697527, Apr 13, 2010

Nov 20, 2003

10/718129

Norival R. Figueira - Campbell CA, US
Paul A. Bottorff - Palo Alto CA, US
Huiwen Li - San Jose CA, US

Nortel Networks Limited - St. Laurent, Quebec

H04L 12/56

370392, 370389

Frame contained destination information may be used by a switch to identify an appropriate output port for a given frame without performing a table access operation. This reduces the processing requirements of the switch to enable the switch to handle frames more efficiently. The frame contained destination information may be contained in the frame's local destination MAC addresses (DA) such that a portion of the DA directly indicates, for each switch that handles the frame, an output port for that switch. Different portions of the DA may be used by different switches, depending on where they are in the network hierarchy. Large switches may also use sub-fields within their allocated portion in the DA to identify internal switching components. A location resolution server may be provided to store and distribute IP and MAC addresses and respond to local ARP requests on the local domain.

7756035, Jul 13, 2010

Jan 31, 2006

11/343996

Nigel Bragg - Weston Colville, GB
Paul Bottorff - Palo Alto CA, US
David Allan - Ottawa, CA
Robert Friskney - Harlow, GB
Simon Parry - Harlow, GB

Nortel Networks Limited - St. Laurent, Quebec

H04L 12/26
H04L 12/28
H04L 12/56
G06F 15/16
G06F 15/173

370235, 370256, 37039532, 370408, 709238, 709252

A method is provided of planning routes and allocating route identifiers in a managed frame-forwarding network. The network comprises a plurality of nodes interconnected by links, with each node being arranged to forward data frames according to a combination of an identifier and a network address carried by a received data frame and forwarding instructions stored at the node. A first step of the method identifies a sub-set of nodes which are core nodes of the network. The remaining nodes are termed outlying nodes. A spanning tree is then built off each of the identified core nodes, with the spanning tree stopping one link short of any other core node. Each spanning tree defines a loop-free path between a core node at the root of the spanning tree and a set of outlying nodes. Connections are planned between roots of the spanning trees and a different identifier is allocated to each planned connection between a pair of spanning trees.

7876749, Jan 25, 2011

Nov 23, 2005

11/287583

Norival Figueira - Campbell CA, US
Paul Bottorff - Palo Alto CA, US

Nortel Networks Limited - Mississauga, Ontario

H04L 12/28

370389, 370535

A metro area network is provided that includes edge and core multiplexors each having a plurality of line ports and one or more uplink ports, a transport network carrying multiplexed traffic between the edge and core multiplexors. In a hard cross connect implementation utilizing source port tagging, a cross-connect device coupled to the core multiplexors provisions or maps communications path between the core multiplexors thereby providing preselected connectivity/mapping of two or more line ports of any of the edge multiplexors. In a soft cross connect implementation utilizing destination port tagging, a cross-connect device includes additional cross-connect multiplexors and functionality to control the destination port tagging performed in the edge, core and cross connect multiplexors thereby provisioning or mapping the desired communications path(s) between various endpoints.

7944941, May 17, 2011

May 29, 2000

09/979983

Paul A. Bottorff - Palo Alto CA, US
David W. Martin - Stittsville, CA
Ronald J. Gagnon - Nepean, CA
Roger D. Carroll - Ottawa, CA
Yuet C. Lee - Danville CA, US

Ciena Corporation - Linthicum MD

H04J 3/22
H04J 3/00
H04J 3/24
H04L 12/28

370466, 3703955, 370474, 370476, 370907

A high-speed Ethernet using Thin SONET technology as the physical layer carrier makes use the large embedded base of SONET equipment, and is a step forward in integrating WANs, MANs and LANs. The HS Ethernet also takes advantage or current SONET functionality, such as framing, scrambling, integrity, etc. FEC fields are provided in the TOH for achieving a high level of error correction. The HS Ethernet frame comprises a length-type field generated at the PCS sublayer and a HEC field generated at the PMA layer. The frames are routed within a network using the source address, the destination address and a label.

8228916, Jul 24, 2012

Apr 9, 2010

12/757209

Norival R. Figueira - Campbell CA, US
Paul A. Bottorff - Palo Alto CA, US
Huiwen Li - San Jose CA, US

Rockstar Bidco L.P. - New York NY

H04L 12/28

370392, 370401, 370469, 370389

Frame contained destination information may be used by a switch to identify an appropriate output port for a given frame without performing a table access operation. This reduces the processing requirements of the switch to enable the switch to handle frames more efficiently. The frame contained destination information may be contained in the frame's local destination MAC addresses (DA) such that a portion of the DA directly indicates, for each switch that handles the frame, an output port for that switch. Different portions of the DA may be used by different switches, depending on where they are in the network hierarchy. Large switches may also use sub-fields within their allocated portion in the DA to identify internal switching components. A location resolution server may be provided to store and distribute IP and MAC addresses and respond to local ARP requests on the local domain.

8238245, Aug 7, 2012

Apr 1, 2010

12/752228

Nigel Bragg - Weston Colville, GB
Paul Bottorff - Palo Alto CA, US
David Allan - Ottawa, CA
Robert Friskney - Harlow, GB
Simon Parry - Harlow, GB

Rockstar Bidco, LP - New York NY

H04L 12/26
H04L 12/28
H04L 12/56
G06F 15/16
G06F 15/173

370235, 370256, 37039532, 370408, 709238, 709252

A method is provided of planning routes and allocating route identifiers in a managed frame-forwarding network. The network comprises a plurality of nodes interconnected by links, with each node being arranged to forward data frames according to a combination of an identifier and a network address carried by a received data frame and forwarding instructions stored at the node. A first step of the method identifies a sub-set of nodes which are core nodes of the network. The remaining nodes are termed outlying nodes. A spanning tree is then built off each of the identified core nodes, with the spanning tree stopping one link short of any other core node. Each spanning tree defines a loop-free path between a core node at the root of the spanning tree and a set of outlying nodes. Connections are planned between roots of the spanning trees and a different identifier is allocated to each planned connection between a pair of spanning trees.

8625410, Jan 7, 2014

May 11, 2009

12/463827

Bashar Abdullah - Ottawa, CA
Marc Holness - Nepean, CA
Paul Bottorff - Portola Valley CA, US
Bernard St-Denis - Ottawa, CA

Ciena Corporation - Hanover MD

H04L 12/28
G01R 31/08
G06F 15/173

370222, 370221, 370225, 370389, 370256, 709238

A system for controlling packet forwarding through a dual-homed connection between first and second network domains, the dual-homed connection including two peer nodes connected to the first and second network domains. A sub-ring network is instantiated in the first network domain, and includes at least two nodes connected in a linear topology between a pair of end-nodes. Each end-node corresponds with a respective one of the peer nodes. A virtual link through the second network domain for conveys traffic of the sub-ring network between the peer nodes, and closes the sub-ring network to define a ring topology. Each of the nodes of the sub-ring network is controlled to forward packets of the sub-ring network in accordance with a ring network routing scheme.