Patents by Inventor Ming-Ju Ho

Ming-Ju Ho 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).

  • Publication number: 20120202553
    Abstract: The claimed subject matter facilitates sharing antennas among carriers co-located at a base station such to increase throughput of the individual carriers. Thus, the carriers can effectively receive multiple-input/multiple-output (MIMO) from mobile devices though the individual antennas of the carrier alone are not sufficient to receive such signals. A co-sharing interface is provided that takes signals from antennas of one carrier and forwards the signals to a second co-located carrier. In this regard, a carrier can receive signals from a related set of antennas as well as the co-sharing interface component (from a set of antennas related to a disparate carrier) and process the signals in conjunction. Thus, the signals can be disparate portions of a MIMO signal. In addition, the co-sharing interface can modify the signals as defined by the carrier receiving the signals from the interface, such as by applying gain control, alarming, bypass circuitry, and/or amplification.
    Type: Application
    Filed: April 17, 2012
    Publication date: August 9, 2012
    Applicant: AT&T MOBILITY II LLC
    Inventors: Allenn Han, Ming-Ju Ho, Stalin Fernando Albanes
  • Patent number: 8213978
    Abstract: Characterization and enhancement of a mobile local scattering environment. The system includes a channel component and a link control component, wherein the channel component facilitates communication of a ping signal, which is used to estimate the delay spread characteristics and/or angle of arrival in order to characterize the mobile local scattering environment. This information is sent to the link control component, which enhances radio link performance based on the received information. The system can be used to assist in E-911 location applications, such as determining the location of an indoor user.
    Type: Grant
    Filed: August 29, 2005
    Date of Patent: July 3, 2012
    Assignee: AT&T Mobility II LLC
    Inventors: Ming-Ju Ho, Ali Jabbary, Stalin Albanes
  • Patent number: 8180404
    Abstract: The claimed subject matter facilitates sharing antennas among carriers co-located at a base station such to increase throughput of the individual carriers. Thus, the carriers can effectively receive multiple-input/multiple-output (MIMO) from mobile devices though the individual antennas of the carrier alone are not sufficient to receive such signals. A co-sharing interface is provided that takes signals from antennas of one carrier and forwards the signals to a second co-located carrier. In this regard, a carrier can receive signals from a related set of antennas as well as the co-sharing interface component (from a set of antennas related to a disparate carrier) and process the signals in conjunction. Thus, the signals can be disparate portions of a MIMO signal. In addition, the co-sharing interface can modify the signals as defined by the carrier receiving the signals from the interface, such as by applying gain control, alarming, bypass circuitry, and/or amplification.
    Type: Grant
    Filed: December 11, 2008
    Date of Patent: May 15, 2012
    Assignee: AT&T Mobility II LLC.
    Inventors: Allenn Han, Ming-Ju Ho, Stalin Fernando Albanes
  • Patent number: 8130813
    Abstract: A method and apparatus for transmitting beacon signals in a wireless communications network. For a given cell site, a single frequency may be used for the beacon signal by assigning different beacon signal time slots to different sectors of the cell site. During one time slot, the beacon signal is transmitted to one of the sectors, and during another one of the time slots, the beacon signal is transmitted to a different one of the sectors. Because a single frequency can be used for all of the sectors of a cell site, more frequencies are available for other purposes, such as for user traffic, for example. The invention improves spectral efficiency, reduces adjacent channel interference and co-channel interference and allows power consumption to be controlled.
    Type: Grant
    Filed: May 1, 2008
    Date of Patent: March 6, 2012
    Assignee: AT & T Mobility II LLC
    Inventors: Ming-Ju Ho, Ali Jabbary, Ramzi Barghouthi
  • Patent number: 7929972
    Abstract: The present invention provides a method of transmitting data across a communications network having multiple channels, a controller for use with a transceiver in a wireless communications network and a wireless communications device. In one embodiment, the method of transmitting data includes establishing a bandwidth for transmission of the data based on a priority status thereof, selecting a modulation scheme and symbol rate as a function of the establishing the bandwidth, concluding if at least one channel from the multiple channels provides the bandwidth and transmitting the data over the as least one channel based on the concluding.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: April 19, 2011
    Assignee: Agere Systems Inc.
    Inventors: John L. Blair, Ming-Ju Ho, Michael S. Rawles, Raymond R. Thomas
  • Patent number: 7873336
    Abstract: In communications between a pair of stations using modulated carrier signals, a first station estimates the carrier frequency offset with respect to the second station and transmits signals that are responsive to the estimated carrier frequency offset. The first station may adjust the carrier frequency of the signals it transmits in response to the estimated carrier frequency offset, and/or transmit data to the second station representing the estimated carrier frequency offset. The second station adjusts the carrier frequency of the signals it transmits to the first station, and/or compensates for carrier frequency offset in its processing of received signals, in response to estimated carrier frequency offset data received from the first station.
    Type: Grant
    Filed: March 2, 2007
    Date of Patent: January 18, 2011
    Assignee: Agere Systems Inc.
    Inventors: Fan Fei, Ming-Ju Ho, Dukhyun Kim, Marcel Johannes Gerhardus Vriikorte
  • Publication number: 20110009085
    Abstract: Distributed node systems and methods provide emergency call services to users indoors. A distributed node can be located in a building and configured to receive call requests from users in the building. The distributed node can transmit call requests to a central node that relays the call requests to a wireless network. The distributed node can also transmit node identifying information with the call request, which may be relayed to the wireless network. The wireless network can determine that a call request is a request for an emergency call and obtain location information and emergency services provider routing information based on a node identifier. The wireless network can transmit the location information to the emergency services provider using the emergency services provider routing information and set up the requested call.
    Type: Application
    Filed: October 27, 2009
    Publication date: January 13, 2011
    Applicant: AT&T MOBILITY II LLC
    Inventors: Stalin Fernando Albanes, Ming-Ju Ho, Allenn Han
  • Publication number: 20100151907
    Abstract: The claimed subject matter facilitates sharing antennas among carriers co-located at a base station such to increase throughput of the individual carriers. Thus, the carriers can effectively receive multiple-input/multiple-output (MIMO) from mobile devices though the individual antennas of the carrier alone are not sufficient to receive such signals. A co-sharing interface is provided that takes signals from antennas of one carrier and forwards the signals to a second co-located carrier. In this regard, a carrier can receive signals from a related set of antennas as well as the co-sharing interface component (from a set of antennas related to a disparate carrier) and process the signals in conjunction. Thus, the signals can be disparate portions of a MIMO signal. In addition, the co-sharing interface can modify the signals as defined by the carrier receiving the signals from the interface, such as by applying gain control, alarming, bypass circuitry, and/or amplification.
    Type: Application
    Filed: December 11, 2008
    Publication date: June 17, 2010
    Applicant: AT&T MOBILITY II LLC
    Inventors: Allenn Han, Ming-Ju Ho, Stalin Fernando Albanes
  • Publication number: 20100112996
    Abstract: A technique for operating an antenna system includes using a downlink antenna to provide radio frequency information to a central antenna controller and adjusting operating parameters of the antenna system based thereon. In at least one embodiment of the invention, an apparatus includes a central antenna control facility configured to communicate at least one operation parameter to a first antenna facility associated with a first antenna in a first cell coverage area. The at least one operation parameter is determined at least partially based on information associated with a signal received from the first antenna by a downlink antenna in a second cell coverage area.
    Type: Application
    Filed: October 31, 2008
    Publication date: May 6, 2010
    Inventors: Ming-Ju Ho, Stalin Fernando Albanes
  • Publication number: 20100091718
    Abstract: The innovation relates to a system and/or methodology for the reduction of pilot power transmission in mobile communication systems. More specifically, the innovation relates to varying the transmit power of a pilot signal to increase the power available to other services, such as customer voice and data communication. In addition, reducing the transmit power of the pilot signal can reduce or militate against interference with the pilot signals of neighboring or nearby cells.
    Type: Application
    Filed: October 14, 2008
    Publication date: April 15, 2010
    Applicant: AT&T MOBILITY II LLC
    Inventors: Ming-Ju Ho, Clinton Harper
  • Patent number: 7684771
    Abstract: In the method and apparatus of controlling power of a transmitted communication signal, a communication signal is amplified and transmitted. At least one parameter on the transmitted signal is received, and a measure of interference with the transmitted signal is determined based on the received parameter. An average power level of the communication signal is increased by clipping the communication signal prior to amplification by an amount based on the determined measure.
    Type: Grant
    Filed: November 16, 2006
    Date of Patent: March 23, 2010
    Assignee: Agere Systems Inc.
    Inventors: John L. Blair, Ming-Ju Ho, Dukhyun Kim, Michael S. Rawles
  • Publication number: 20080242307
    Abstract: A method and apparatus for transmitting beacon signals in a wireless communications network. For a given cell site, a single frequency may be used for the beacon signal by assigning different beacon signal time slots to different sectors of the cell site. During one time slot, the beacon signal is transmitted to one of the sectors, and during another one of the time slots, the beacon signal is transmitted to a different one of the sectors. Because a single frequency can be used for all of the sectors of a cell site, more frequencies are available for other purposes, such as for user traffic, for example. The invention improves spectral efficiency, reduces adjacent channel interference and co-channel interference and allows power consumption to be controlled.
    Type: Application
    Filed: June 10, 2008
    Publication date: October 2, 2008
    Applicant: CINGULAR WIRELESS LLC
    Inventors: Ming-Ju Ho, Ali Jabbary, Ramzi Barghouthi
  • Patent number: 7385953
    Abstract: A method and apparatus for transmitting beacon signals in a wireless communications network. For a given cell site, a single frequency may be used for the beacon signal by assigning different beacon signal time slots to different sectors of the cell site. During one time slot, the beacon signal is transmitted to one of the sectors, and during another one of the time slots, the beacon signal is transmitted to a different one of the sectors. Because a single frequency can be used for all of the sectors of a cell site, more frequencies are available for other purposes, such as for user traffic, for example. The invention improves spectral efficiency, reduces adjacent channel interference and co-channel interference and allows power consumption to be controlled.
    Type: Grant
    Filed: October 26, 2004
    Date of Patent: June 10, 2008
    Assignee: AT&T Mobility II LLC
    Inventors: Ming-Ju Ho, Ali Jabbary, Ramzi Barghouthi
  • Patent number: 7269394
    Abstract: In communications between a pair of stations using modulated carrier signals, a first station estimates the carrier frequency offset with respect to the second station and transmits signals that are responsive to the estimated carrier frequency offset. The first station may adjust the carrier frequency of the signals it transmits in response to the estimated carrier frequency offset, and/or transmit data to the second station representing the estimated carrier frequency offset. The second station adjusts the carrier frequency of the signals it transmits to the first station, and/or compensates for carrier frequency offset in its processing of received signals, in response to estimated carrier frequency offset data received from the first station.
    Type: Grant
    Filed: October 2, 2002
    Date of Patent: September 11, 2007
    Assignee: Agere Systems Inc.
    Inventors: Fan Fei, Ming-Ju Ho, Dukhyun Kim, Marcel Johannes Gerhardus Vrijkorte
  • Publication number: 20070173203
    Abstract: In communications between a pair of stations using modulated carrier signals, a first station estimates the carrier frequency offset with respect to the second station and transmits signals that are responsive to the estimated carrier frequency offset. The first station may adjust the carrier frequency of the signals it transmits in response to the estimated carrier frequency offset, and/or transmit data to the second station representing the estimated carrier frequency offset. The second station adjusts the carrier frequency of the signals it transmits to the first station, and/or compensates for carrier frequency offset in its processing of received signals, in response to estimated carrier frequency offset data received from the first station.
    Type: Application
    Filed: March 2, 2007
    Publication date: July 26, 2007
    Inventors: Fan Fei, Ming-Ju Ho, Dukhyun Kim, Marcel Gerhardus Vriikorte
  • Publication number: 20070087707
    Abstract: In the method and apparatus of controlling power of a transmitted communication signal, a communication signal is amplified and transmitted. At least one parameter on the transmitted signal is received, and a measure of interference with the transmitted signal is determined based on the received parameter. An average power level of the communication signal is increased by clipping the communication signal prior to amplification by an amount based on the determined measure.
    Type: Application
    Filed: November 16, 2006
    Publication date: April 19, 2007
    Inventors: John Blair, Ming-Ju Ho, Dukhyun Kim, Michael Rawles
  • Patent number: 7158765
    Abstract: In the method and apparatus of controlling power of a transmitted communication signal, a communication signal is amplified and transmitted. At least one parameter on the transmitted signal is received, and a measure of interference with the transmitted signal is determined based on the received parameter. An average power level of the communication signal is increased by clipping the communication signal prior to amplification by an amount based on the determined measure.
    Type: Grant
    Filed: July 31, 2001
    Date of Patent: January 2, 2007
    Assignee: Agere Systems, Inc.
    Inventors: John L. Blair, Ming-Ju Ho, Dukhyun Kim, Michael S. Rawles
  • Publication number: 20060205423
    Abstract: The present invention provides a method of transmitting data across a communications network having multiple channels, a controller for use with a transceiver in a wireless communications network and a wireless communications device. In one embodiment, the method of transmitting data includes establishing a bandwidth for transmission of the data based on a priority status thereof, selecting a modulation scheme and symbol rate as a function of the establishing the bandwidth, concluding if at least one channel from the multiple channels provides the bandwidth and transmitting the data over the as least one channel based on the concluding.
    Type: Application
    Filed: May 31, 2006
    Publication date: September 14, 2006
    Applicant: Agere Systems Inc.
    Inventors: John Blair, Ming-Ju Ho, Michael Rawles, Raymond Thomas
  • Patent number: 7079847
    Abstract: The present invention provides a controller for use with a transceiver in a wireless communications network. In one embodiment, the controller includes a sensing system that senses, perhaps periodically, at least one characteristic associated with at least two channels of the wireless communications network. The controller further includes a modification system that updates channel information in a channel information table associated with the at least two channels based on the at least one characteristic. The controller still further includes a selection system that selects channels in accordance with the channel information.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: July 18, 2006
    Assignee: Agere Systems Inc.
    Inventors: John L. Blair, Ming-Ju Ho, Michael S. Rawles, Raymond R. Thomas
  • Publication number: 20060089141
    Abstract: A method and apparatus for transmitting beacon signals in a wireless communications network. For a given cell site, a single frequency may be used for the beacon signal by assigning different beacon signal time slots to different sectors of the cell site. During one time slot, the beacon signal is transmitted to one of the sectors, and during another one of the time slots, the beacon signal is transmitted to a different one of the sectors. Because a single frequency can be used for all of the sectors of a cell site, more frequencies are available for other purposes, such as for user traffic, for example. The invention improves spectral efficiency, reduces adjacent channel interference and co-channel interference and allows power consumption to be controlled.
    Type: Application
    Filed: October 26, 2004
    Publication date: April 27, 2006
    Inventors: Ming-Ju Ho, Ali Jabbary, Ramzi Barghouthi