Jiening N Ao

6721352, Apr 13, 2004

Aug 6, 2002

10/213051

Jiening Ao - Suwanee GA

Scientific-Atlanta, Inc. - Lawrenceville GA

H04L 2500

375216, 375213, 375224

The present invention provides an improved apparatus and method for detecting a reverse carrier signal. The present invention utilizes a peak detector/envelope filter for determining the peak level of the reverse analog waveform. The peak level is compared to a threshold level during a predetermined time period to determine the presence of a valid reverse carrier signal. Once determined, an enable signal is provided to an electronics device that allows further transmission of the reverse signals.

6751271, Jun 15, 2004

Aug 6, 2002

10/213683

Jiening Ao - Suwanee GA

Scientific-Atlanta, Inc. - Lawrenceville GA

H04L 2722

375326

The present invention provides an apparatus and method for detecting the presence of a carrier signal that is included in the reverse signals of a communications system. The present invention uses an improved apparatus that determines the average power of the reverse signals during a predetermined counting cycle. The average power is then compared to a threshold power value. If the average power exceeds the threshold power value, an enable signal is provided to allow further transmission of the reverse signals.

6976042, Dec 13, 2005

May 3, 2002

10/138688

Jiening Ao - Suwanee GA, US

Scientific-Atlanta, Inc. - Lawrenceville GA

G06J001/00

708 3, 341110

A low cost white noise generator. An oscillator provides a signal to an analog-to-digital (AID) converter for digitizing. A bit-order reversal circuit reverses the order of the received bits, wherein the reversal circuit provides bits having an order ranging from LSB to MSB. A digital-to-analog (D/A) converter subsequently converts the reversed digital signal back to an analog signal, which is a white noise signal due to the random nature of reversing the bits provided by the A/D converter.

7054564, May 30, 2006

Jun 11, 2002

10/166803

Jiening Ao - Suwanee GA, US

Scientific-Atlanta, Inc. - Lawrenceville GA

H04B 10/00

398192, 398197

The present invention is directed towards an open-loop thermal compensation circuit that is suitable for use in a burst-mode laser transmitter. The compensation circuit adjusts the optical power level to ensure that the laser diode remains at an optimum power level. The thermal compensation circuit includes a thermistor having a thermal current, which is dependent upon any temperature fluctuations, where the thermal current adjusts a laser current. A change in the laser current subsequently adjusts the optical power level. Also included is a control circuit for turning on and off the laser diode with a control current, which is dependent upon the presence or absence of incoming electrical signals.

7218901, May 15, 2007

Sep 17, 2002

10/245853

Joseph Graham Mobley - Dunwoody GA, US
Jiening Ao - Suwanee GA, US
Steven E. Blashewski - Duluth GA, US
Florin Farcas - Lawrenceville GA, US

Scientific-Atlanta, Inc. - Lawrenceville GA

H04B 1/18
H04B 7/00

4551822, 4551922, 455258

An architecture for providing high-speed access over frequency-division multiplexed (FDM) channels allows transmission of ethernet frames and/or other data across a cable transmission network or other form of FDM transport. The architecture involves downstream and upstream FDM multiplexing techniques to allow contemporaneous, parallel communications across a plurality of frequency channels. Moreover, an automatic frequency control resolves some issues of a free-running clock in an upstream tuner of the central concentrator by performing adjustments based on the average frequency error of a number of active upstream tones. In the preferred embodiments of the present invention, the automatic frequency control (AFC) utilizes a feedback loop for at least each active upstream tone. Also, the average of the active upstream tones is determined and is utilized in providing feedback to adjust the automatic frequency control (AFC).

7336680, Feb 26, 2008

Sep 17, 2002

10/244899

Donald C. Sorenson - Lawrenceville GA, US
Jiening Ao - Suwanee GA, US
Steven E. Blashewski - Duluth GA, US
John W. Brickell - Lawrenceville GA, US
Florin Farcas - Lawrenceville GA, US
Richard J. Futch - Lawrenceville GA, US
Joseph Graham Mobley - Dunwoody GA, US

Scientific-Atlanta, Inc. - Lawrenceville GA

H04J 3/16

370468, 370480, 370477, 370442, 375298, 725129

An architecture for providing high-speed access over frequency-division multiplexed (FDM) channels allows transmission of ethernet frames and/or other data across a cable transmission network or other form of FDM transport. The architecture involves downstream and upstream FDM multiplexing techniques to allow contemporaneous, parallel communications across a plurality of frequency channels. Furthermore, the architecture allows a central concentrator to support a plurality of remote devices that each have guaranteed bandwidth through connection-oriented allocations of bi-directional data flows. The upstream and downstream bandwidth allocation can support symmetrical bandwidth as well as asymmetrical bandwidth in either direction. The architecture generally can be used to support connection-oriented physical layer connectivity between a remote device and the central concentrator. Furthermore, the architecture may be integrated into other higher level devices such as, but not limited to, bridges, switches, routers, and/or gateways.

7519081, Apr 14, 2009

Sep 17, 2002

10/245179

Donald C. Sorenson - Lawrenceville GA, US
Jiening Ao - Suwanee GA, US
Steven E. Blashewski - Duluth GA, US
John W. Brickell - Lawrenceville GA, US
Florin Farcas - Lawrenceville GA, US
Richard J. Futch - Lawrenceville GA, US
Joseph Graham Mobley - Dunwoody GA, US

Cisco Technology, Inc. - San Jose CA

H04J 3/16

370468, 370480, 370434

Disclosed herein are methods of providing a client with local area network connectivity and access to other services in a cable network. One such method includes: allocating bandwidth in the network to support bi-directional data communication between the host and a central concentrator. Bandwidth is allocated for a downstream flow on at least one downstream frequency channel based on a mapping between the downstream flow and a particular octet in a downstream packet. Bandwidth is allocated for an upstream flow on at least one non-shared upstream tone. The method also includes conveying a bi-directional data flow between the host and the concentrator over the allocated bandwidth, including conveying the upstream flow using the allocated bandwidth and conveying the downstream flow using the allocated bandwidth. The method also includes utilizing bandwidth in the network not allocated to data communications to provide the host with at least one audio/visual service.

7801119, Sep 21, 2010

Dec 11, 2007

11/953941

Donald C. Sorenson - Lawrenceville GA, US
Jiening Ao - Suwanee GA, US
Steven E. Blashewski - Duluth GA, US
John W. Brickell - Lawrenceville GA, US
Florin Farcas - Lawrenceville GA, US
Richard J. Futch - Lawrenceville GA, US
Joseph Graham Mobley - Dunwoody GA, US

Scientific-Atlanta, LLC - Lawrenceville GA

H04L 12/66

370356, 370351, 370486, 725111

An architecture for providing high-speed access over frequency-division multiplexed (FDM) channels allows transmission of ethernet frames and/or other data across a cable transmission network or other form of FDM transport. The architecture involves downstream and upstream FDM multiplexing techniques to allow contemporaneous, parallel communications across a plurality of frequency channels. Furthermore, the architecture allows a central concentrator to support a plurality of remote devices that each have guaranteed bandwidth through connection-oriented allocations of bi-directional data flows. The upstream and downstream bandwidth allocation can support symmetrical bandwidth as well as asymmetrical bandwidth in either direction. The architecture generally can be used to support connection-oriented physical layer connectivity between a remote device and the central concentrator. Furthermore, the architecture may be integrated into other higher level devices such as, but not limited to, bridges, switches, routers, and/or gateways.