Patents by Inventor Kenneth D. Ko

Kenneth D. Ko has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10225195
    Abstract: A telecommunication system employs dynamic shaping based on current load conditions for at least one congestion point in order to achieve a fair allocation of network bandwidth. In one exemplary embodiment, shaper control logic communicates with virtual scheduler/shapers to learn current load conditions for at least one congestion point. Using such load information, the shaper control logic dynamically controls the shaper rates for the virtual scheduler/shapers so that packet flows for services of the same class passing through the congestion point achieve a desired (e.g., same or similar) performance regardless of which virtual scheduler/shaper is communicating each respective packet flow.
    Type: Grant
    Filed: March 11, 2017
    Date of Patent: March 5, 2019
    Assignee: ADTRAN, Inc.
    Inventors: Kenneth D. Ko, Richard L. Goodson
  • Patent number: 9742905
    Abstract: The present disclosure generally pertains to systems and methods for communicating data. In one exemplary embodiment, a system has a high-speed channel, such as an optical fiber, between a network facility, such as a central office (CO), and a first intermediate point between the network facility and a plurality of customer premises (CP). Digital communication links, such as DSL links, are used to carry data between the first intermediate point, such as a feeder distribution interface (FDI), and a second intermediate point, such as the Distribution Point (DP). Non-shared links may then carry the data from the second intermediate point to the CPs. The links between the two intermediate points are bonded to create a high-speed, shared data channel that permits peak data rates much greater than what would be achievable without bonding. In some embodiments, multicast data flows may be prioritized and transmitted across a set of connections to each of the intermediate points.
    Type: Grant
    Filed: July 19, 2010
    Date of Patent: August 22, 2017
    Assignee: ADTRAN, Inc.
    Inventors: Kevin W. Schneider, Fred Chu, Kenneth D. Ko, Richard Goodson
  • Patent number: 9729241
    Abstract: A telecommunication system employs dynamic shaping across a plurality of access modules of an access node using a dynamic bandwidth allocation (DBA) algorithm that is based on current load conditions for each of the access modules in order to achieve a fair allocation of network bandwidth at the access node. In one exemplary embodiment, access modules at an access node communicate via a control channel with shaper control logic that receives load information from each of the access modules. Using such load information, the shaper control logic dynamically controls the shaper rates for the access modules so that a fair allocation of network bandwidth is achieved across all of the access modules. Specifically, the shaper rates are controlled such that packet flows for services of the same class achieve the same or similar performance (e.g., average data rate) regardless of which access module is communicating each respective packet flow.
    Type: Grant
    Filed: May 7, 2015
    Date of Patent: August 8, 2017
    Assignee: ADTRAN, Inc.
    Inventors: Richard L. Goodson, Kenneth D. Ko
  • Publication number: 20170187632
    Abstract: A telecommunication system employs dynamic shaping based on current load conditions for at least one congestion point in order to achieve a fair allocation of network bandwidth. In one exemplary embodiment, shaper control logic communicates with virtual scheduler/shapers to learn current load conditions for at least one congestion point. Using such load information, the shaper control logic dynamically controls the shaper rates for the virtual scheduler/shapers so that packet flows for services of the same class passing through the congestion point achieve a desired (e.g., same or similar) performance regardless of which virtual scheduler/shaper is communicating each respective packet flow.
    Type: Application
    Filed: March 11, 2017
    Publication date: June 29, 2017
    Inventors: Kenneth D. Ko, Richard L. Goodson
  • Patent number: 9692481
    Abstract: A communication system has a trunk extending from a network facility, such as a central office, with a plurality of distribution points positioned along the trunk. Each leg of the trunk defines a shared channel that permits peak data rates much greater than what would be achievable without channel sharing. As an example, the connections of each respective trunk leg may be bonded. Further, the same modulation format and crosstalk vectoring are used for each leg of the trunk. The crosstalk vectoring cancels both far-end crosstalk (FEXT) that couples between connections of a given trunk leg and crossover crosstalk that couples between one trunk leg and another. In addition, logic determines an amount of excess capacity available for each leg of the trunk and controls error correction based on the determined excess capacity.
    Type: Grant
    Filed: September 17, 2015
    Date of Patent: June 27, 2017
    Assignee: ADTRAN, Inc.
    Inventors: Fred Chu, Kenneth D. Ko
  • Publication number: 20160112091
    Abstract: A communication system has a trunk extending from a network facility, such as a central office, with a plurality of distribution points positioned along the trunk. Each leg of the trunk defines a shared channel that permits peak data rates much greater than what would be achievable without channel sharing. As an example, the connections of each respective trunk leg may be bonded. Further, the same modulation format and crosstalk vectoring are used for each leg of the trunk. The crosstalk vectoring cancels both far-end crosstalk (FEXT) that couples between connections of a given trunk leg and crossover crosstalk that couples between one trunk leg and another. In addition, logic determines an amount of excess capacity available for each leg of the trunk and controls error correction based on the determined excess capacity.
    Type: Application
    Filed: September 17, 2015
    Publication date: April 21, 2016
    Inventors: Fred Chu, Kenneth D. Ko
  • Publication number: 20150350083
    Abstract: A telecommunication system uses a dynamic bandwidth allocation (DBA) algorithm based on current load conditions for controlling transmissions to a plurality of access modules of an access node in order to achieve a fair allocation of network bandwidth at the access node. As an example, access modules at an access node communicate via a control channel with dynamic bandwidth allocation (DBA) logic that receives load information from each of the access modules. Using such load information, the DBA logic dynamically controls the upstream data rates so that a fair allocation of network bandwidth is achieved across all of the access modules. Specifically, the data rates are controlled such that packet flows for services of the same class achieve the same or similar performance (e.g., average data rate) regardless of which access module is receiving each respective packet flow.
    Type: Application
    Filed: August 11, 2015
    Publication date: December 3, 2015
    Inventors: Richard Goodson, Ramya Raghavendra, Kenneth D. Ko
  • Publication number: 20150326479
    Abstract: A telecommunication system employs dynamic shaping across a plurality of access modules of an access node using a dynamic bandwidth allocation (DBA) algorithm that is based on current load conditions for each of the access modules in order to achieve a fair allocation of network bandwidth at the access node. In one exemplary embodiment, access modules at an access node communicate via a control channel with shaper control logic that receives load information from each of the access modules. Using such load information, the shaper control logic dynamically controls the shaper rates for the access modules so that a fair allocation of network bandwidth is achieved across all of the access modules. Specifically, the shaper rates are controlled such that packet flows for services of the same class achieve the same or similar performance (e.g., average data rate) regardless of which access module is communicating each respective packet flow.
    Type: Application
    Filed: May 7, 2015
    Publication date: November 12, 2015
    Inventors: Richard L. Goodson, Kenneth D. Ko
  • Patent number: 9143195
    Abstract: A communication system has a trunk extending from a network facility, such as a central office, with a plurality of distribution points positioned along the trunk. Each leg of the trunk defines a shared channel that permits peak data rates much greater than what would be achievable without channel sharing. As an example, the connections of each respective trunk leg may be bonded. Further, the same modulation format and crosstalk vectoring are used for each leg of the trunk. The crosstalk vectoring cancels both far-end crosstalk (FEXT) that couples between connections of a given trunk leg and crossover crosstalk that couples between one trunk leg and another. In addition, logic determines an amount of excess capacity available for each leg of the trunk and controls error correction based on the determined excess capacity.
    Type: Grant
    Filed: July 7, 2011
    Date of Patent: September 22, 2015
    Assignee: ADTRAN, Inc.
    Inventors: Fred Chu, Kenneth D. Ko, Richard Goodson, Kevin W. Schneider
  • Patent number: 8411696
    Abstract: The present disclosure generally pertains to systems and methods for communicating data. In one exemplary embodiment, a system has a high-speed channel, such as an optical fiber, between a network facility, such as a central office (CO), and a first intermediate point between the network facility and a plurality of customer premises (CP). Digital communication links, such as DSL links, are used to carry data between the first intermediate point, such as a feeder distribution interface (FDI), and a second intermediate point, such as the Distribution Point (DP). Non-shared links may then carry the data from the second intermediate point to the CPs. The links between the two intermediate points are bonded to create a high-speed, shared data channel that permits peak data rates much greater than what would be achievable without bonding. In some embodiments, multicast data flows may be prioritized and transmitted across a set of connections to each of the intermediate points.
    Type: Grant
    Filed: July 19, 2010
    Date of Patent: April 2, 2013
    Assignee: ADTRAN, Inc.
    Inventors: Kenneth D. Ko, Kevin W. Schneider
  • Publication number: 20130010585
    Abstract: A communication system has a trunk extending from a network facility, such as a central office, with a plurality of distribution points positioned along the trunk. Each leg of the trunk defines a shared channel that permits peak data rates much greater than what would be achievable without channel sharing. As an example, the connections of each respective trunk leg may be bonded. Further, the same modulation format and crosstalk vectoring are used for each leg of the trunk. The crosstalk vectoring cancels both far-end crosstalk (FEXT) that couples between connections of a given trunk leg and crossover crosstalk that couples between one trunk leg and another. In addition, logic determines an amount of excess capacity available for each leg of the trunk and controls error correction based on the determined excess capacity.
    Type: Application
    Filed: July 7, 2011
    Publication date: January 10, 2013
    Inventors: Fred Chu, Kenneth D. Ko, Richard Goodson, Kevin W. Schneider
  • Patent number: 7173944
    Abstract: A digital subscriber line (DSL) communication system that utilizes the high frequency band of a standard telephone line does not require the use of a plain old telephone service (POTS) splitter in the resident's home, which provided isolation between the POTS frequency band (0 to 4 kHz) and the DSL frequency band. A digital subscriber line modem utilizes either constant envelope modulation or quadrature amplitude modulation for outputting DSL signals upstream to a central office. When a telephone in the resident's home is detected as being off-hook, then the constant envelope modulation is used by the DSL modem in order to lessen the intermodulation product distortion that results in audible noise heard by a user of the telephone. When the telephone is on-hook, then another type of modulation, such as QAM, is used to maximize the upstream data rate capability in the DSL frequency band, since any noise generated by the QAM is not a problem due to the non-use of the POTS frequency band.
    Type: Grant
    Filed: April 11, 2000
    Date of Patent: February 6, 2007
    Assignee: Conexant Systems, Inc.
    Inventors: Kenneth D. Ko, David O. Anderton, Ismail I. Eldumiati, Steven A. Gronemeyer, Don L. Harmer, P. Michael Henderson, Joel D. Peshkin, Raphael Rahamim, Frederic M. Stubbe, John S. Walley, Kenneth S. Walley, Yongbing Wan, Edward S. Zuranski, Jamal Haque, Anthony A. Tzouris, Shrenik P. Patravali, Ganning Yang
  • Patent number: 6993067
    Abstract: Fractional bit rate encoding in a pulse amplitude modulation (PAM) communication environment allows the transmission of fractional bit rates, thus maximizing the use of signal-to-noise ratio (SNR) available on a communication channel. The invention allows the transmission of fractional bit rates in a PAM transceiver, thus allowing the encoding and transmission of a fractional number of bits on each PAM transmit symbol. By encoding a non-integer number of bits, a non power-of-two number of PAM levels can be encoded.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: January 31, 2006
    Assignee: Paradyne Corporation
    Inventors: William L. Betts, Kenneth D. Ko
  • Patent number: 6445733
    Abstract: A digital subscriber line communication system does not require the use of a plain old telephone service (POTS) splitter in the resident's home. Digital signal processing techniques are utilized to adapt to varying subscriber line conditions due to POTS telephone equipment. The digital signal processing techniques eliminate the need for a splitter by reducing susceptibility to distortion due to varying subscriber line characteristics. The digital subscriber line modem characterizes the subscriber line under a variety of conditions when the modem is in a non-idle mode. The digital subscriber line modem includes a control circuit which performs rapid retrain operation utilizing line characterization information.
    Type: Grant
    Filed: February 23, 1998
    Date of Patent: September 3, 2002
    Assignee: Conexant Systems, Inc.
    Inventors: Edward S. Zuranski, Kenneth D. Ko, Jamal Haque, Shrenik P. Patravali, Manuel I. Rodriguez, Keith A. Souders, Anthony A. Tzouris
  • Patent number: 6430219
    Abstract: A digital subscriber line communication system does not require the use of a plain old telephone service (POTS) splitter in the resident's home. Digital signal processing techniques are utilized to adapt to varying subscriber line conditions due to POTS telephone equipment. The digital signal processing techniques eliminate the need for a splitter by reducing susceptibility to distortion due to varying subscriber line characteristics. The digital subscriber line modem characterizes the subscriber line under a variety of conditions. The digital subscriber line modem includes a control circuit which performs rapid retrain operation utilizing line characterization information.
    Type: Grant
    Filed: February 23, 1998
    Date of Patent: August 6, 2002
    Assignee: Conexant Systems, Inc.
    Inventors: Edward S. Zuranski, Kenneth D. Ko, Jamal Haque, Shrenik P. Patravali, Manuel I. Rodriguez, Keith A. Souders, Anthony A. Tzouris
  • Patent number: 6356585
    Abstract: A splitterless digital subscriber line modem adapted to be coupled to a subscriber line including a sending end and a receiving end, the modem being capable of simultaneous access to the subscriber line with other telephone equipment operating in a frequency band below four kilohertz is disclosed herein. The modem includes a data terminal and a control circuit. The data terminal couples the modem to the subscriber line. The control circuit is coupled to the data terminal and receives and transmits signals to and from the data terminal. The control circuit utilizes line coding techniques to measure signal and noise at the receiving end and adjusts amplitude of the signal in response to the signal and the noise whereby power of the signal is optimized.
    Type: Grant
    Filed: September 29, 1998
    Date of Patent: March 12, 2002
    Assignee: Conexant Systems, Inc.
    Inventors: Kenneth D. Ko, Jamal Haque
  • Patent number: 6263077
    Abstract: A digital subscriber line communication system does not require the use of a plain old telephone service (POTS) splitter in the resident's home. Digital signal-processing techniques are utilized to accommodate varying subscriber line conditions coming from POTS telephone equipment. The digital signal-processing techniques eliminate the need for a splitter by reducing susceptibility to distortion resulting from varying subscriber line characteristics. The digital subscriber line modem can utilize quadrature amplitude modulated (QAM) signals and frequency division multiplexing. The digital subscriber line modem includes a control circuit that implements an echo canceler and an analyzer to reduce near-end cross-talk noise. The analyzer performs spectral analysis to preemphasize or to predistort the transmitted signals in accordance with the cross-talk noise.
    Type: Grant
    Filed: February 23, 1998
    Date of Patent: July 17, 2001
    Assignee: Conexant Systems, Inc.
    Inventors: Edward S. Zuranski, Kenneth D. Ko, Jamal Haque, Shrenik P. Patravali, Manuel I. Rodriguez, Keith A. Souders, Anthony A. Tzouris
  • Patent number: 6212227
    Abstract: A digital subscriber line (DSL) communication system that utilizes the high frequency band of a standard telephone line does not require the use of a plain old telephone service (POTS) splitter in the resident's home, which provided isolation between the POTS frequency band (0 to 4 kHz) and the DSL frequency band. Digital signal processing techniques are utilized to adapt to varying subscriber line conditions due to POTS telephone equipment. The digital signal processing techniques eliminate the need for a splitter by reducing susceptibility to distortion due to varying subscriber line characteristics. The digital subscriber line modem utilizes constant envelope modulated signals and frequency division multiplexing, where the constant envelope modulations lessens the intermodulation distortion products due to DSL signals that are transmitted by the modem and which may result in audible noise at the POTS telephone equipment due to non-linearities of the POTS telephone equipment.
    Type: Grant
    Filed: December 2, 1997
    Date of Patent: April 3, 2001
    Assignee: Conexant Systems, Inc.
    Inventors: Kenneth D. Ko, David O. Anderton, Ismail I. Eldumiati, Steven A. Gronemeyer, Don L. Harmer, P. Michael Henderson, Joel D. Peshkin, Raphael Rahamim, Frederic M. Stubbe, John S. Walley, Kenneth S. Walley, Yongbing Wan, Edward S. Zuranski, Jamal Haque, Anthony A. Tzouris, Shrenik P. Patravali, Ganning Yang
  • Patent number: 6161203
    Abstract: A digital subscriber line communication system does not require the use of a plain old telephone service (POTS) splitter in the resident's home. Digital signal processing is utilized to adapt to varying subscriber line conditions coming from POTS telephone equipment. The digital subscriber line modem includes a control circuit that utilizes a Reed-Solomon decoder and a synchronization error generator. The Reed-Solomon decoder provides a frame error signal, and the synchronization error generator responds to the frame error signal to generate a synchronization error signal. The synchronization error generator is configured as a leaking integrator to provide the synchronization error signal in response to a relatively large number of frame error signals occurring in a period of time. A resynchronization operation is performed in the modem in response to the synchronization error signal.
    Type: Grant
    Filed: February 23, 1998
    Date of Patent: December 12, 2000
    Assignee: Conexant Systems, Inc.
    Inventors: Edward S. Zuranski, Kenneth D. Ko, Jamal Haque, Shrenik P. Patravali, Manuel I. Rodriguez, Keith A. Souders, Anthony A. Tzouris
  • Patent number: 6151335
    Abstract: A digital subscriber line (DSL) communication system that utilizes the high frequency band of a standard telephone line does not require the use of a plain old telephone service (POTS) splitter in the resident's home, which provided isolation between the POTS frequency band (0 to 4 kHz) and the DSL frequency band. A digital subscriber line modem utilizes either constant envelope modulation or quadrature amplitude modulation for outputting DSL signals upstream to a central office. When a telephone in the resident's home is detected as being off-hook, then the constant envelope modulation is used by the DSL modem in order to lessen the intermodulation product distortion that results in audible noise heard by a user of the telephone. When the telephone is on-hook, then another type of modulation, such as QAM, is used to maximize the upstream data rate capability in the DSL frequency band, since any noise generated by the QAM is not a problem due to the non-use of the POTS frequency band.
    Type: Grant
    Filed: December 2, 1997
    Date of Patent: November 21, 2000
    Assignee: Conexant Systems, Inc.
    Inventors: Kenneth D. Ko, David O. Anderton, Ismail I. Eldumiati, Steven A. Gronemeyer, Don L. Harmer, P. Michael Henderson, Joel D. Peshkin, Raphael Rahamim, Frederic M. Stubbe, John S. Walley, Kenneth S. Walley, Yongbing Wan, Edward S. Zuranski, Jamal Haque, Anthony A. Tzouris, Shrenik P. Patravali, Ganning Yang