Mark A Libby

US Patent:

7835362, Nov 16, 2010

Filed:

Mar 2, 2006

Appl. No.:

11/366239

Inventors:

Mark Gordon Libby - Groton MA, US
Ronald Mark Parker - Boxborough MA, US
Fouad Hallal - Worcester MA, US

Assignee:

Ciena Corporation - Linthicum MD

International Classification:

H04L 12/56

US Classification:

370394

Abstract:

The present invention provides methods and systems for the management of sequence-sensitive, connection-oriented traffic on a multi-link aggregated port. The methods include: at a first end of a multi-link aggregated port, selectively enabling a first constituent link of a plurality of constituent links to transmit data traffic in a first direction via a transmit state block associated with the first constituent link; and, at the first end of the multi-link aggregated port, selectively enabling the plurality of constituent links to receive data traffic from a second direction via a plurality of receive state blocks associated with the plurality of constituent links. The methods also include: at a second end of the multi-link aggregated port, selectively enabling a second constituent link of the plurality of constituent links to transmit data traffic in the second direction via a transmit state block associated with the second constituent link; and, at the second end of the multi-link aggregated port, selectively enabling the plurality of constituent links to receive data traffic from the first direction via a plurality of receive state blocks associated with the plurality of constituent links.

US Patent:

8295278, Oct 23, 2012

Filed:

Dec 18, 2007

Appl. No.:

11/958656

Inventors:

Himanshu Shah - Hopkinton MA, US
Mark Libby - Groton MA, US
David Parks - Chelmsford MA, US

Assignee:

Ciena Corporation - Hanover MD

International Classification:

H04L 12/28

US Classification:

370389, 370409, 3703955, 370392

Abstract:

The present invention provides systems and methods which create an infrastructure/transport Pseudowire (PW) a priori between two Provider Edge (PE) devices. Accordingly, other PWs can be mapped to this transport PW. In an exemplary application, the transport PW (which is a MS-PW by itself) can start and end between two Switching Provider Edge (S-PE) devices and span across multiple S-PEs in between. In another exemplary application, the transport PW terminates between two Terminating Provider Edge (T-PE) devices spanning across all S-PEs in between. In a further exemplary application, the transport PW can start at a S-PE or T-PE and terminate at a T-PE or S-PE, respectively. The placement of the endpoints of the transport PW (on two PEs) determines the number of intervening S-PEs that benefit from this application.

US Patent:

20220393969, Dec 8, 2022

Filed:

Feb 15, 2022

Appl. No.:

17/672519

Inventors:

- Redmond WA, US
Mark Gordon LIBBY - Groton MA, US
Srinivas KAPPLA - Nashua NH, US
Ronald Mark PARKER - Manchester MA, US
Neeraj SURANA - Bengaluru, IN
Anupama RAGHAVAN - Acton MA, US
Bashir ASHRAFI - Nashua NH, US

International Classification:

H04L 45/24
H04L 45/00

Abstract:

A method for improving availability of a type of network element in a mobile network includes receiving a first message from a source network element at a first network element instance that belongs to a network element anycast set. The first message is addressed to an anycast address that is assigned to the network element anycast set. The first network element instance processes the first message and accesses an anycast set data store in relation to processing the first message. The method also includes receiving a second message from the source network element at a second network element instance that also belongs to the network element anycast set. The second message is also addressed to the anycast address and can be received when the first network element instance is unavailable. The second network element instance processes the second message and accesses the anycast set data store in relation thereto.

US Patent:

20180352036, Dec 6, 2018

Filed:

May 31, 2018

Appl. No.:

15/994224

Inventors:

- Acton MA, US
Vinay M. CHERIAN - Westford MA, US
Mark LIBBY - Groton MA, US
Nan LUO - Shrewsbury MA, US

International Classification:

H04L 29/08

Abstract:

Embodiments disclosed herein relate to systems and methods for separately managing control and data plan contexts for a secure connection during a standby node switchover scenario. Primary and standby nodes for a secure connection can both maintain a data plane context for a secure connection such as IPSec. In the event that the primary node becomes inactive, the standby node can immediately begin processing data plane traffic using the data plane context for the secure connection maintained at the standby node. Control plane information necessary for programming and activating a control plane context can be stored until needed. During a switchover, the standby node can retrieve the control plane information and activate the control plane context after it has begun processing the data plane traffic.

US Patent:

20170195898, Jul 6, 2017

Filed:

Dec 23, 2016

Appl. No.:

15/389588

Inventors:

- Acton MA, US
Mark LIBBY - Groton MA, US
Narsi VELDANDA - Northboro MA, US
Rajesh PALAKKAL - Groton MA, US
Siddharth BHOJNAGARWALA - Concord MA, US

International Classification:

H04W 24/02
H04W 28/02
H04L 12/815

Abstract:

Systems and methods for adaptively adjusting a transaction rate at a mobile network node. A first mobile network client node receives configuration parameters including an initial transaction rate, a step up rate, a step down rate, a minimum rate, a maximum rate, an evaluation time period, a step up response time threshold, a step down response time threshold, a step up threshold percentage of responses, and a step down threshold percentage of responses. Responses associated with communications with the server node are received during a first time period associated with the evaluation time period. A percentage of the received responses being less than the step up response time threshold and a percentage of the received responses being greater than the step down response time threshold are determined. An initial transaction rate is increased by the step up rate or decreased by the step down rate based on the determined percentages.