Richard D Hart

US Patent:

7079626, Jul 18, 2006

Filed:

Mar 5, 2003

Appl. No.:

10/382182

Inventors:

Richard Dennis Hart - Concord CA, US
David Lewis Kimble - Danville CA, US
Laxman Sahasrabuddhe - San Ramon CA, US
Raghvendra G. Savoor - Walnut Creek CA, US
Frederick Michael Armanino - San Antonio TX, US

Assignee:

SBC Properties, L.P. - Reno NV

International Classification:

H04M 1/24
H04M 3/08
H04M 3/22

US Classification:

379 104, 379 1503, 379 2204, 379 2701

Abstract:

A system and method for imputing data into a database includes an imputing system operable to impute data based on outside plant construction principles. The imputing system includes an inventory database, a data engine, a search engine, and a loop engine. The inventory database includes a plurality of distribution records each associated with one or more cable pairs. The data engine determines if a desired distribution record corresponding to a desired cable pair includes missing data. The search engine searches a known class of serving terminals for complete distribution records and iteratively searches a sized binder group within the inventory database for one or more complete distribution records where the size of the binder group searched increases with each iterative search. The loop engine determines an imputed value for the desired distribution record based on the searching and imputes the value into the desired distribution record.

US Patent:

7388906, Jun 17, 2008

Filed:

May 3, 2004

Appl. No.:

10/838180

Inventors:

Richard Dennis Hart - San Ramon CA, US
Raghvendra G. Savoor - Walnut Creek CA, US
Laurie G. King - San Jose CA, US
George Keith Cambron - Round Rock TX, US
Kapil Shrikhande - Berkeley CA, US

Assignee:

SBC Knowledge Ventures, L.P. - Reno NV

International Classification:

H04B 1/38

US Classification:

375222, 375219, 375224, 379 104

Abstract:

In a particular embodiment a method of collecting and processing modem data is provided. The method includes, during training of a broadband modem, sending a series of tones within a frequency transmission band of the broadband modem, receiving the transmitted series of tones at a receiving broadband modem, receiving a measurement value, determining a transmission loss for each of the series of tones by comparing the predetermined transmission power level, and the received measured power level, performing a statistical match comparison between each of the received tone signals and a plurality of different computer models of a single transmission facility having various bridge taps connected to the single transmission facility, and determining a best fit between each of the received tone signals and one of the plurality of the bridge tap computer models. The series of tones have a predetermined transmission power level.

US Patent:

7606145, Oct 20, 2009

Filed:

Nov 29, 2005

Appl. No.:

11/288927

Inventors:

Jin Wang - Walnut Creek CA, US
Canhui Ou - Danville CA, US
Richard Dennis Hart - Concord CA, US
Raghvendra Savoor - Walnut Creek CA, US
Stephen A. Sposato - Lafayette CA, US

Assignee:

SBC Knowledge Ventures, L.P. - Reno NV

International Classification:

H04L 12/26

US Classification:

370228, 34082501

Abstract:

A dual-mode broadband modem operative to operate in a service mode and a surveillance mode is disclosed. Generally, the dual-mode broadband modem comprises a primary communication device; a secondary communication device; a central processing unit in communication with the primary and secondary communication devices; and a memory unit in communication with the central processing unit. In the service mode, the primary communication device communicates with a broadband service provider and the central processing unit stores historical information regarding performance of the primary communication device in the memory unit. If an interruption in broadband service is detected, or the performance of the primary communication device falls below a predetermined threshold, the dual-mode broadband modem switches to surveillance mode and the secondary communication device is activated. The secondary communication device communicates with the broadband service provider to send at least a portion of the historical information regarding performance of the primary communication device to the broadband service provider for processing to determine a source of the interruption in broadband service or a source of the decreased performance of the primary communication device.

US Patent:

7620154, Nov 17, 2009

Filed:

Dec 23, 2002

Appl. No.:

10/328278

Inventors:

G. Keith Cambron - Walnut Creek CA, US
David L. Kimble - Danville CA, US
Clifford E. Yackle - Austin TX, US
Richard D. Hart - Concord CA, US

International Classification:

H04M 1/24
H04M 3/08
H04M 3/22

US Classification:

379 104, 379 103, 379 22, 379 24

Abstract:

An equivalent working length (EWL) determinative system () for use in a digital subscriber line (DSL) telecommunication network () is provided. The EWL system () includes a DSL circuit () having a customer site () with customer premises equipment (). The customer premises equipment () receives and transmits communication signals and generates a first attenuation signal in response to the communication signals. A remote terminal () forms a loop () with the customer site () and has a loop length. The remote terminal () includes a remote terminal transceiver () that is in communication with the customer premises equipment (). A main controller () is electrically coupled to the customer premises equipment () and determines an EWL of the loop () in response to the first attenuation signal. A method of performing the same is also provided.

US Patent:

7778192, Aug 17, 2010

Filed:

Nov 29, 2005

Appl. No.:

11/288969

Inventors:

Kapil Shrikhande - Berkeley CA, US
Raghvendra G. Savoor - Walnut Creek CA, US
Xidong Wu - Livermore CA, US
Jin Wang - Walnut Creek CA, US
John Van Slyke - Lafayette CA, US
Richard D. Hart - Concord CA, US

Assignee:

AT&T Intellectual Property I, L.P. - Reno NV

International Classification:

H04L 12/26

US Classification:

370248

Abstract:

A system and method to perform double-ended measurements of a network is provided. The system includes a test device that makes measurements at the customer end and a portable computing device that interfaces with the test device, a customer gateway and database at a network location to analyze the data and determine a performance metric of the network.

US Patent:

7903790, Mar 8, 2011

Filed:

Jun 14, 2006

Appl. No.:

11/424100

Inventors:

Richard Dennis Hart - Concord CA, US
David Lewis Kimble - Danville CA, US
Laxman Sahasrabuddhe - San Ramon CA, US
Raghvendra G. Savoor - Walnut Creek CA, US
Frederick Michael Armanino - San Antonio TX, US

Assignee:

AT&T Intellectual Property I, L.P. - Reno NV

International Classification:

H04M 1/24
H04M 3/08
H04M 3/22

US Classification:

379 104, 379 1503, 379 2204, 379 2701

Abstract:

A system and method for imputing data into a database includes an imputing system operable to impute data based on outside plant construction principles. The imputing system includes an inventory database, a data engine, a search engine, and a loop engine. The inventory database includes a plurality of distribution records each associated with one or more cable pairs. The data engine determines if a desired distribution record corresponding to a desired cable pair includes missing data. The search engine searches a known class of serving terminals for complete distribution records and iteratively searches a sized binder group within the inventory database for one or more complete distribution records where the size of the binder group searched increases with each iterative search. The loop engine determines an imputed value for the desired distribution record based on the searching and imputes the value into the desired distribution record.

US Patent:

8170814, May 1, 2012

Filed:

May 15, 2007

Appl. No.:

11/803698

Inventors:

Jin Wang - Union City CA, US
Kapil Shrikhande - Berkeley CA, US
Richard D. Hart - Concord CA, US
Raghvendra Savoor - Walnut Creek CA, US

Assignee:

AT&T Intellectual Property I, L.P. - Atlanta GA

International Classification:

G01R 15/00

US Classification:

702 57, 702 58, 702 59, 702 65, 702 69, 702 90

Abstract:

In a particular embodiment, a method is disclosed that includes receiving data related to a customer premise equipment (CPE) device and determining an impedance mismatch between a transmission line and the CPE device based on the received data. The method further includes initiating removal of a source of the impedance mismatch in response to determining the impedance mismatch.

US Patent:

8249176, Aug 21, 2012

Filed:

Nov 20, 2008

Appl. No.:

12/274549

Inventors:

Richard Hart - Concord CA, US

Assignee:

AT&T Intellectual Property I, LP - Atlanta GA

International Classification:

H04B 3/00

US Classification:

375257, 375222

Abstract:

The present invention is directed to determining a length of at least one bridged tap on a transmission line. The invention includes estimating an Equivalent Working Length (EWL) associated with the transmission line using an Hspectrum by converting at least one Hdata point in an EWL estimation, determining the shortest EWL estimation to be an EWL associated with the tap, and determining loss due to the tap by subtracting the Hfor a straight piece of 26G wire of length EWL from the input data H. The losses are then removed from the Hspectrum using the EWL. A tap associated with a peak can be identified in a Fourier analysis of the Hspectrum. A length of a tap is determined using a Chi-squared analysis by verifying a tap, subtracting the theoretical loss due to the tap from the Hspectrum and repeating the process until all taps are identified.