Sumanth Jagannathan

US Patent:

8340279, Dec 25, 2012

Filed:

Oct 5, 2007

Appl. No.:

12/444381

Inventors:

Sumanth Jagannathan - Palo Alto CA, US
John Cioffi - Atherton CA, US

Assignee:

Adaptive Spectrum and Signal Alignment, Inc. - Redwood City CA

International Classification:

H04M 9/00
H04M 1/76
H04M 7/00

US Classification:

379417, 379416

Abstract:

An adaptive interference cancellation system is described. In one example the system operates by receiving a data signal using a DSL (Digital Subscriber Line) and receiving a reference signal, the reference signal corresponding, in part, to noise on the data signal. The reference signal is classified and a noise cancellation signal is applied to the data signal based on the classification.

US Patent:

8428225, Apr 23, 2013

Filed:

Jul 31, 2007

Appl. No.:

12/375216

Inventors:

John M. Cioffi - Atherton CA, US
Wonjong Rhee - San Francisco CA, US
George Ginis - San Mateo CA, US
Sumanth Jagannathan - Palo Alto CA, US

Assignee:

Adaptive Spectrum and Signal Alignment, Inc. - Redwood City CA

International Classification:

H04M 1/24

US Classification:

379 3201, 379 904, 379 1505, 379 2203, 379 104

Abstract:

Data indicative of a level of stability of a DSL link is received. Based on the received data, it is determined whether the data indicates a level of stability of the DSL link that is above or below a minimum threshold. If the level of stability of the DSL link is below the minimum threshold, die noise associated with the DSL link before the time of failure is compared with the noise associated with the DSL link after the time of failure. If the difference between the noise before and after the time of failure exceeds a threshold, then the difference in noise is characterized as a stationary noise associated with the DSL link. However, if the difference between the noise before and after the time of failure is below the threshold, a determination is made whether the failure is associated with a loss of power to the DSL link or a severe impulse noise event—the difference in noise is characterized accordingly. Finally, the characterization of the noise associated with the DSL link is preserved for subsequent possible reconfiguration of the DSL link to improve link stability.

US Patent:

20080298444, Dec 4, 2008

Filed:

Oct 3, 2006

Appl. No.:

12/089044

Inventors:

John M. Cioffi - Atherton CA, US
Wonjong Rhee - San Francisco CA, US
Georgios Ginis - San Mateo CA, US
Sumanth Jagannathan - Palo Alto CA, US
Peter Silverman - Evanston IL, US
Mehdi Mohseni - Menlo Park CA, US

International Classification:

H04B 1/38

US Classification:

375222

Abstract:

Methods, techniques, computer program products, apparatus, devices, etc., used in connection with DSL Management Interfaces, significantly improve the management capabilities of a DSL network and/or improve testing relating to DSL equipment and services by permitting better control and operation of a DSL system, including implementation of timestamping for more accurate measurement, monitoring and control of a system. Timestamping further allows customized data collection techniques, where a DSL line can be measured or monitored at intervals whose frequency depends on the line's stability. Moreover, data parameter read and control parameter write operations are presented in conjunction with the use of timestamping. Also, control and operation of a DSL system is enhanced by implementing bit-loading that minimizes, eliminates or otherwise mitigates the amount by which the SNR margin per tone exceeds a maximum SNR margin quantity, where such bit-loading can be selected through an appropriate interface.

US Patent:

20100074312, Mar 25, 2010

Filed:

Oct 11, 2007

Appl. No.:

12/445278

Inventors:

John M. Cioffi - Atherton CA, US
George Ginis - San Mateo CA, US
Sumanth Jagannathan - Palo Alto CA, US

Assignee:

ADAPTIVE SPECTRUM AND SIGNAL AND ALIGNMENT, INC. - Reedwood City CA

International Classification:

H04L 5/16

US Classification:

375222

Abstract:

A high speed multiple user multiple-loop DSL system is described. In one embodiment, it includes a first DSL loop to carry DSL traffic to a first user and a second DSL loop to carry DSL traffic to a second user. A first junction connects the traffic of the first DSL loop to a third DSL loop, and a second junction connects the traffic of the second DSL loop to the third DSL loop.

US Patent:

20110299579, Dec 8, 2011

Filed:

Aug 22, 2011

Appl. No.:

13/214598

Inventors:

John M. Cioffi - Atherton CA, US
Wonjong Rhee - San Francisco CA, US
Georgios Ginis - San Mateo CA, US
Sumanth Jagannathan - Palo Alto CA, US
Peter Joshua Silverman - Evanston IL, US
Mehdi Mohseni - Menlo Park CA, US

Assignee:

ADAPTIVE SPECTRUM AND SIGNAL ALIGNMENT, INC. - Redwood City CA

International Classification:

H04B 1/38

US Classification:

375222

Abstract:

Methods, techniques, computer program products, apparatus, devices, etc., used in connection with DSL Management Interfaces, significantly improve the management capabilities of a DSL network and/or improve testing relating to DSL equipment and services by permitting better control and operation of a DSL system, including implementation of timestamping for more accurate measurement, monitoring and control of a system. Timestamping further allows customized data collection techniques, where a DSL line can be measured or monitored at intervals whose frequency depends on the line's stability. Moreover, data parameter read and control parameter write operations are presented in conjunction with the use of timestamping. Also, control and operation of a DSL system is enhanced by implementing bit-loading that minimizes, eliminates or otherwise mitigates the amount by which the SNR margin per tone exceeds a maximum SNR margin quantity, where such bit-loading can be selected through an appropriate interface.

US Patent:

20130230084, Sep 5, 2013

Filed:

Mar 21, 2013

Appl. No.:

13/848668

Inventors:

Wonjong Rhee - San Francisco CA, US
Georgios Ginis - San Mateo CA, US
Sumanth Jagannathan - Palo Alto CA, US

International Classification:

H04L 1/20

US Classification:

375222

Abstract:

Data indicative of a level of stability of a DSL link is received. Based on the received data, it is determined whether the data indicates a level of stability of the DSL link that is above or below a minimum threshold. If the level of stability of the DSL link is below the minimum threshold, die noise associated with the DSL link before the time of failure is compared with the noise associated with the DSL link after the time of failure. If the difference between the noise before and after the time of failure exceeds a threshold, then the difference in noise is characterized as a stationary noise associated with the DSL link. However, if the difference between the noise before and after the time of failure is below the threshold, a determination is made whether the failure is associated with a loss of power to the DSL link or a severe impulse noise event—the difference in noise is characterized accordingly. Finally, the characterization of the noise associated with the DSL link is preserved for subsequent possible reconfiguration of the DSL link to improve link stability.

US Patent:

20150222486, Aug 6, 2015

Filed:

Apr 13, 2015

Appl. No.:

14/685522

Inventors:

John Cioffi - Atherton CA, US
Wonjong Rhee - San Francisco CA, US
Sumanth Jagannathan - Palo Alto CA, US
Peter Joshua Silverman - Evanston IL, US
Mehdi Mohseni - Menlo Park CA, US
Georgios Ginis - San Mateo CA, US

Assignee:

ADAPTIVE SPECTRUM AND SIGNAL ALIGNMENT, INC. - Redwood City CA

International Classification:

H04L 12/24
H04M 11/06
H04L 12/26

Abstract:

Methods, techniques, computer program products, apparatus, devices, etc., used in connection with DSL Management Interfaces, significantly improve the management capabilities of a DSL network and/or improve testing relating to DSL equipment and services by permitting better control and operation of a DSL system, including implementation of timestamping for more accurate measurement, monitoring and control of a system. Timestamping further allows customized data collection techniques, where a DSL line can be measured or monitored at intervals whose frequency depends on the line's stability. Moreover, data parameter read and control parameter write operations are presented in conjunction with the use of timestamping. Also, control and operation of a DSL system is enhanced by implementing bit-loading that minimizes, eliminates or otherwise mitigates the amount by which the SNR margin per tone exceeds a maximum SNR margin quantity, where such bit-loading can be selected through an appropriate interface.

US Patent:

20140133539, May 15, 2014

Filed:

Jan 23, 2014

Appl. No.:

14/162133

Inventors:

John M. Cioffi - Atherton CA, US
Wonjong Rhee - San Francisco CA, US
Georgios Ginis - San Mateo CA, US
Sumanth Jagannathan - Palo Alto CA, US

International Classification:

H04L 1/20

US Classification:

375227

Abstract:

Data indicative of a level of stability of a DSL link is received. Based on the received data, it is determined whether the data indicates a level of stability of the DSL link that is above or below and minimum threshold. If the level of stability of the DSL link is below the minimum threshold, die noise associated with the DSL link before the time of failure is compared with the noise of failure. If the difference between the noise before and after the time of failure exceeds a threshold, then the difference in noise is characterized as a stationary noise associated with the DSL link. However, if the difference between the noise before and after the time of failure is below the threshold, a determination is made whether the failure is associated with a loss of power to the DSL link or a severe impulse noise event the difference in noise is characterized accordingly. Finally, the characterization of the noise associated with the DSL link is preserved for subsequent possible reconfiguration of the DSL link to improve link stability.