Harbhajan Singh Virdee

US Patent:

7355985, Apr 8, 2008

Filed:

Mar 22, 2004

Appl. No.:

10/806575

Inventors:

Harbhajan Virdee - Richardson TX, US

Assignee:

FutureWei Technologies, Inc. - Plano TX

International Classification:

H04L 12/28

US Classification:

370254, 370216, 370221, 370258

Abstract:

A method and system for processing a squelch table for optical network applications. The method includes receiving a first cross-connection entry associated with a first cross-connection and a first channel, and generating a first squelch entry associated with the first channel in a first squelch table associated with a first node. Additionally, the method includes sending a first request message associated with the first cross-connection to a second node. Moreover, the method includes if a first response message associated with the first cross-connection is received at the first node in response to the first request message within a predetermined period of time, processing information associated with the first response message and modifying the first squelch entry in response to at least information associated with the first response message.

US Patent:

8352537, Jan 8, 2013

Filed:

Sep 8, 2009

Appl. No.:

12/555416

Inventors:

Harbhajan Singh Virdee - Allen TX, US

Assignee:

Futurewei Technologies, Inc. - Plano TX

International Classification:

H04J 14/02

US Classification:

709200, 709250, 370254, 370410

Abstract:

An apparatus comprising a plurality of entities associated with a network element (NE), wherein the entities are associated with each other in a hierarchical architecture, wherein each entity is assigned an Access Identifiers (AID), and wherein each AID comprises a prefix that indicates a type for the corresponding entity and a numerical field that indicates the association between the corresponding entities and the remaining entities. Also disclosed is an apparatus comprising at least one processor configured to implement a method comprising assigning an AID to each of a plurality of NE entities having a hierarchical relationship, wherein the AID comprises a prefix comprising no more than about five characters and a numerical string consisting essentially of numbers, and managing the NE entities using the AIDs.

US Patent:

20040208520, Oct 21, 2004

Filed:

May 31, 2002

Appl. No.:

10/161274

Inventors:

Paparao Palacharla - Richardson TX, US
Hok Pua - Plano TX, US
Emir Catovic - Plano TX, US
Harbhajan Virdee - Richardson TX, US

Assignee:

Fujitsu Network Communications, Inc.

International Classification:

H04B010/08
H04B010/12

US Classification:

398/030000

Abstract:

A method for optical supervisory signaling includes determining a wavelength channel status (WCS) value, a wavelength channel failure (WCF) value, and a wavelength channel lit (WCL) value for each one of multiple data channels services by an optical communication node. The method further includes communicating the values to a second optical communication node.

US Patent:

20060285542, Dec 21, 2006

Filed:

Dec 6, 2005

Appl. No.:

11/296660

Inventors:

Linda Dunbar - Plano TX, US
Harbhajan Virdee - Richardson TX, US
John McLaughlin - McKinney TX, US

Assignee:

FutureWei Technologies, Inc. - Plano TX

International Classification:

H04L 12/56

US Classification:

370395510

Abstract:

A method and system for providing channel concatenations. The method includes generating a plurality of STSm's associated with a plurality of network nodes. m is a positive integer, and the plurality of STSm's is allocated for linking a first device and a second device through the plurality of network nodes. Additionally, the method includes setting the plurality of STSm's to a first plurality of states related to the plurality of network nodes. The plurality of network nodes includes a first node and a second node. Moreover, the method includes determining whether a first valid signal is received from the first device by the first node, the first valid signal including information associated with a concatenation.

US Patent:

54736862, Dec 5, 1995

Filed:

Feb 1, 1994

Appl. No.:

8/190775

Inventors:

Harbhajan S. Virdee - Richardson TX

Assignee:

Tandy Corporation - Forth Worth TX

International Classification:

H04M 900

US Classification:

379410

Abstract:

The length (or the number of taps) of an adaptive finite impulse response (AFIR) filter is continuously modified to produce optimal echo cancellation. In accordance with one illustrative embodiment, this modification is performed by increasing or decreasing the number of delayed samples which are used to generate an echo estimate. More specifically, the number of samples used to generate the echo estimate is determined by selecting a trial number of samples and operating the filter for a sufficient length of time to allow the tap weights in the filter to stabilize. The tap weights are then examined to determine whether the taps at the end on the filter contribute at least a first threshold amount to the echo estimate. If not, the number of samples used in the filter is reduced and the process repeated. If the taps at the end of the filter contribute more than a second threshold amount, the number of samples is increased and the process is repeated.

US Patent:

58188436, Oct 6, 1998

Filed:

Feb 6, 1996

Appl. No.:

8/597123

Inventors:

Harbhajan S. Virdee - Richardson TX
Mike M. Tatachar - Allen TX

Assignee:

DSC Communications Corporation - Plano TX

International Classification:

H04J 317

US Classification:

370435

Abstract:

An N:1 transcoder (12, 40) with a compression data path that includes uncompressed digroup circuits (92, 94, 96, 98, and 100) each receiving N incoming uncompressed signal and extracting a plurality of control, signaling, and voice/data traffic channels therefrom, a compressor (120) coupled to the uncompressed digroup circuits (92, 94, 96, 98, and 100) and compressing data in selected ones of the extracted voice/data channels, and a compressed data circuit (126) coupled to the compressor (120) for packing the compressed data into predetermined channels of one compressed signal, and further providing control, signaling, and performance monitoring information embedded therein.

US Patent:

63208768, Nov 20, 2001

Filed:

Jun 15, 1998

Appl. No.:

9/097606

Inventors:

Harbhajan S. Virdee - Richardson TX
Mike M. Tatachar - Allen TX
Michael H. Jette - Grapevine TX

Assignee:

Alcatel USA, Inc. - Plano TX

International Classification:

H04J 316

US Classification:

370468

Abstract:

An N:1 transcoder (12, 40) with a compression data path that includes uncompressed digroup circuits (92, 94, 96, 98, and 100) each receiving N incoming uncompressed signal and extracting a plurality of control, signaling, and voice/data traffic channels therefrom, a compressor (120) coupled to the uncompressed digroup circuits (92, 94, 96, 98, and 100) and compressing data in selected ones of the extracted voice/data channels, and a compressed data circuit (126) coupled to the compressor (120) for packing the compressed data into predetermined channels of one compressed signal, and further providing control, signaling, and performance monitoring information embedded therein.

US Patent:

56573847, Aug 12, 1997

Filed:

Mar 10, 1995

Appl. No.:

8/401848

Inventors:

Daniel W. Staudacher - Denton TX
Harbhajan S. Virdee - Richardson TX

Assignee:

Tandy Corporation - Ft. Worth TX

International Classification:

H04M 908

US Classification:

379388

Abstract:

A full duplex speakerphone for connection to a telephone system employs adaptive FIR filters for acoustic and electrical echo cancellation in a novel combination with analog gain controls responsive to incoming signal levels and a transmit level control responsive to the receive signal power level. The particular combination minimizes the amount of digital signal processing required to maintain full duplex operation by holding the signal dynamic range within predetermined limits.