DR. KEITH JOHNSON, M.D.
Medical Practice at Grandstand Dr, San Antonio, TX

7594252, Sep 22, 2009

Mar 1, 2005

11/069155

Keith Johnson - San Antonio TX, US
Amol Mandlekar - Austin TX, US

Time Warner Cable, Inc. - Stamford CT

H04N 7/173, G01R 31/08, H04L 12/42, G06F 11/00, G06F 15/173

725107, 725124, 725125, 370216, 370241, 370242, 370244, 370449, 709223, 709224, 714 4

Set top boxes (STBs) connected to the HFC cable network are “pinged” and their responses recorded. The two most responsive STBs in each node of the HFC cable network are identified. The most responsive STB is added to a primary ping list and the next most responsive STB is added to a secondary ping list. The STBs on the primary list are “pinged” and their responses recorded. If an STB on the primary list fails to respond, the secondary STB associated with the node is pinged. If both the primary and secondary STB associated with a node fail to respond to the “ping,” the node is identified as non-responsive. If all of the nodes associated with a modulator (or a demodulator) are identified as non-responsive, the modulator (or demodulator) is identified as “non-responsive. ” Additionally, network devices are pinged and their responses noted. Using the responsiveness of nodes and network devices, faults in segments in an HFC cable network can be identified and located.

7930725, Apr 19, 2011

Aug 4, 2009

12/534915

Keith Johnson - San Antonio TX, US

Time Warner Cable, Inc. - New York NY

H04N 7/173, G01R 31/08, H04L 12/42, G06F 11/00, G06F 15/173

725107, 725124, 725125, 370216, 370241, 370242, 370244, 370449, 709223, 709224, 714 4

A system and method for determining an operational status of a segment of a hybrid fiber coax (HFC) cable network. Subscriber premises units (SPUs) connected to the HFC cable network are “pinged” and their responses recorded. The two most responsive SPUs in each node of the HFC cable network are identified. The most responsive SPU is added to a primary ping list and the next most responsive SPU is added to a secondary ping list. The SPUs on the primary list are “pinged” and their responses recorded. If an SPU on the primary list fails to respond, the secondary SPU associated with the node is pinged. If both the primary and secondary SPU associated with a node fail to respond to the “ping,” the node is identified as non-responsive. If all of the nodes associated with a modulator (or a demodulator) are identified as non-responsive, the modulator (or demodulator) is identified as “non-responsive. ” Additionally, network devices are pinged and their responses noted.

2006021, Sep 28, 2006

Mar 1, 2005

11/069156

Keith Johnson - San Antonio TX, US
Amol Mandlekar - Austin TX, US

H04N 7/173

725107000

A fault detection and isolation system for an HFC cable network and method therefore. A ping list generator captures set top box (STB) identifying information from a billing system, and STB state information from a network control system. The ping list generator creates a ping list from the STB identifying information and the STB state information, wherein the list comprises the IP address of a set of the addressable STBs connected to an HFC cable network. In an exemplary embodiment, the set is of sufficient size to be representative of the health of the HFC cable network. In another embodiment of the present invention, the set comprises substantially all of the addressable STBs connected to the HFC cable network. A ping generator, pings the IP address of the STB and awaits a response. If the response is received from the STB, then identify the STB as responsive. If the response is not received, then identify the STB as non-responsive. A fault isolation processor associates the STB identifying information and the ping response, determines whether a non-responsive fault indicator is present, and, if the fault indicator is present, then identifies a likely cause of the non-responsive fault.

7383473, Jun 3, 2008

Mar 1, 2005

11/069080

Keith Johnson - San Antonio TX, US

Time Warner Cable, Inc. - Stamford CT

G06F 11/00

714 43

A system and method for identifying and isolating faults in a video on demand (VOD) provisioning system. Transaction errors statistics are used to determine whether a fault has occurred in the VOD provisioning system. A high transaction error rate is associated with transaction error rates in components of the VOD provisioning system permitting identification of a likely cause of a high transaction error rate. Remedial action to repair the cause of the system fault is then directed to the likely cause of the high transaction error rate.