Satya P Gupta

US Patent:

7027394, Apr 11, 2006

Filed:

Sep 13, 2001

Appl. No.:

09/952481

Inventors:

Satya V. Gupta - Acton MA, US
Sanjiv Nanda - Lunenburg MA, US
Kiran Rege - Marlboro NJ, US
Nitin Sonawane - Nashua NH, US
Manas Tandon - Waltham MA, US

Assignee:

Narad Networks, Inc. - Westford MA

International Classification:

H04J 1/16

US Classification:

3702301, 3703952

Abstract:

Hybrid fiber/coax networks employ the existing cable plant used for cable TV and transmit data signals in a frequency bandwidth above that which is used for cable TV. As this cable plant was deployed in a tree and branch topology, data transmissions may be susceptible to noise, variable transmission loss and frequency dispersion, particularly in the upstream direction. Further, due to the tree and branch topology, homes at the far end of the network experience much greater loss than do the homes that are near to the headend/ONU. The present system, which uses point-to-point data links between intelligent network elements located in the feeder/distribution network to provide reliable, secure, bi-directional broadband access. Digital signals are terminated at the intelligent network elements, switched and regenerated for transmission across additional upstream or downstream data links as needed to connect a home to a headend or router. The intelligent network elements can be co-located with or replace the standard network elements to take advantage of existing network configurations.

US Patent:

8462626, Jun 11, 2013

Filed:

Aug 20, 2007

Appl. No.:

11/894750

Inventors:

Gautam Desai - Westford MA, US
Subrahmanyam Dravida - Shrewsbury MA, US
Satya V. Gupta - Acton MA, US
Kiran M. Rege - Marlboro NJ, US
Manas Tandon - Waltham MA, US
Ravi S. Kumar - Shrewsbury MA, US
DeQuan Wu - Nashua NH, US

Assignee:

Ciena Corporation - Hanover MD

International Classification:

G01R 31/08

US Classification:

370231

Abstract:

The present system uses point-to-point data links between intelligent network elements located in the feeder/distribution network to provide reliable, secure, bi-directional broadband access. Digital signals, or messages, are terminated at the intelligent network elements, switched and regenerated for transmission across additional upstream or downstream data links as needed to connect a home to a headend or router. Messages indicative of an end user routing ID (RID) are identified and the information extracted for user with successive messages. In this manner, the data links are made over relatively short runs of coax cable, which can provide greater bandwidth than the typical end-to-end feeder/distribution connection between a home and the headend or optical network unit.

US Patent:

8510596, Aug 13, 2013

Filed:

Jul 6, 2007

Appl. No.:

11/825657

Inventors:

Satya V. Gupta - Acton MA, US
Prashant Shenoy - Northampton MA, US

Assignee:

Virsec Systems, Inc. - Acton MA

International Classification:

G06F 11/00

US Classification:

714 15, 714 21, 714 42, 717138

Abstract:

A method or apparatus detects a memory corruption of at least one portion of memory during run-time and corrects the memory corruption of the at least one portion of memory by replacing the at least one portion of memory with a backup of the at least one portion of memory. In this way, memory corruption can be corrected in a timely fashion while minimizing security risks.

US Patent:

20020075805, Jun 20, 2002

Filed:

Sep 13, 2001

Appl. No.:

09/952322

Inventors:

Dev Gupta - Concord MA, US
Satya Gupta - Acton MA, US
Sriram Narayan - Westford MA, US
Frederick Peralta - Lynn MA, US
Kiran Rege - Marlboro NJ, US
Manas Tandon - Waltham MA, US
Subrahmanyam Dravida - Shrewsbury MA, US

Assignee:

Narad Networks, Inc. - Westford MA

International Classification:

G01R031/08

US Classification:

370/235000, 370/256000

Abstract:

Hybrid fiber/coax networks employ the existing cable plant used for cable TV and transmit data signals in a frequency bandwidth above that which is used for cable TV. As this cable plant was deployed in a tree and branch topology, data transmissions may be susceptible to noise, variable transmission loss and frequency dispersion, particularly in the upstream direction. Further, due to the tree and branch topology, homes at the far end of the network experience much greater loss than do the homes that are near to the headend/ONU. The present system, which uses point-to-point data links between intelligent network elements located in the feeder/distribution network to provide reliable, secure, bi-directional broadband access. Digital signals are terminated at the intelligent network elements, switched and regenerated for transmission across additional upstream or downstream data links as needed to connect a home to a headend or router. The intelligent network elements can be co-located with or replace the standard network elements to take advantage of existing network configurations. The standard network elements can be selectively replaced by the intelligent network elements in an incremental approach. Communication through the access network includes receiving a packet from an end user device and identifying a quality of service (QoS) class associated with the packet. A QoS indicator is inserted into the packet indicating the identified QoS class. The augmented packet is sent through at least one intermediate network elements to a first network element at a service level according to the QoS indicator. The QoS indicator is removed from the augmented packet at the first network element to provide a restored packet. In this manner, the data links are made over relatively short runs of coax cable, which can provide greater bandwidth than the typical end-to-end feeder/distribution connection between a home and the headend or optical network unit.

US Patent:

20020138854, Sep 26, 2002

Filed:

Sep 13, 2001

Appl. No.:

09/952480

Inventors:

Gautam Desai - Westford MA, US
Subrahmanyam Dravida - Shrewsbury MA, US
Satya Gupta - Acton MA, US
Kiran Rege - Marlboro NJ, US
Manas Tandon - Waltham MA, US
Ravi Kumar - Shrewsbury MA, US
DeQuan Wu - Nashua NH, US

Assignee:

Narad Networks, Inc. - Westford MA

International Classification:

H04N007/16

US Classification:

725/147000

Abstract:

Hybrid fiber/coax networks employ the existing cable plant used for cable TV and transmit data signals in a frequency bandwidth above that which is used for cable TV. As this cable plant was deployed in a tree and branch topology, data transmissions may be susceptible to noise, variable transmission loss and frequency dispersion, particularly in the upstream direction. Further, due to the tree and branch topology, homes at the far end of the network experience much greater loss than do the homes that are near to the headend/ONU. The present system, which uses point-to-point data links between intelligent network elements located in the feeder/distribution network to provide reliable, secure, bi-directional broadband access. Digital signals, or messages, are terminated at the intelligent network elements, switched and regenerated for transmission across additional upstream or downstream data links as needed to connect a home to a headend or router. Messages indicative of an end user routing ID (RID) are identified and the information extracted for user with successive messages. In this manner, the data links are made over relatively short runs of coax cable, which can provide greater bandwidth than the typical end-to-end feeder/distribution connection between a home and the headend or optical network unit.

US Patent:

20050246754, Nov 3, 2005

Filed:

Jul 11, 2005

Appl. No.:

11/179849

Inventors:

Gautam Desai - Westford MA, US
Subrahmanyam Dravida - Shrewsbury MA, US
Satya Gupta - Acton MA, US
Kiran Rege - Marlboro NJ, US
Manas Tandon - Waltham MA, US
Ravi Kumar - Shrewsbury MA, US
DeQuan Wu - Nashua NH, US

Assignee:

NARAD NETWORKS, INC. - Westford MA

International Classification:

H04N007/173

US Classification:

725118000, 725119000, 725116000, 725117000, 725127000

Abstract:

Hybrid fiber/coax networks employ the existing cable plant used for cable TV and transmit data signals in a frequency bandwidth above that which is used for cable TV. As this cable plant was deployed in a tree and branch topology, data transmissions may be susceptible to noise, variable transmission loss and frequency dispersion, particularly in the upstream direction. Further, due to the tree and branch topology, homes at the far end of the network experience much greater loss than do the homes that are near to the headend/ONU. The present system, which uses point-to-point data links between intelligent network elements located in the feeder/distribution network to provide reliable, secure, bi-directional broadband access. Digital signals, or messages, are terminated at the intelligent network elements, switched and regenerated for transmission across additional upstream or downstream data links as needed to connect a home to a headend or router. Messages indicative of an end user routing ID (RID) are identified and the information extracted for user with successive messages. In this manner, the data links are made over relatively short runs of coax cable, which can provide greater bandwidth than the typical end-to-end feeder/distribution connection between a home and the headend or optical network unit.