Patents by Inventor David M. Theobold

David M. Theobold 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: 20120212380
    Abstract: The invention may provide an antenna device including a communication interface to couple the antenna device to an external device and a package housing with an adhesive surface. A planar antenna pattern may be fabricated on a substrate within the package housing, wherein the antenna pattern is configured to transmit an ultra-wideband signal and to receive a reflection of the transmitted signal.
    Type: Application
    Filed: February 21, 2012
    Publication date: August 23, 2012
    Applicant: PNEUMOSONICS, INC.
    Inventors: David M. THEOBOLD, David Arthur BLUM, Gregory T. SCHULTE, Alan GRESZLER, Vincent OWENS
  • Patent number: 8135412
    Abstract: A load balancer is provided for balancing distribution of wireless clients among wireless access points. The load balancer includes a tracking implementation for tracking at least one telemetry parameter of each wireless client's wireless link with each respective wireless access point. A goal implementation is included for comparing one or more telemetry parameter against at least one predetermined goal to obtain a fitness measure. A control implementation is also provided for varying the operation of at least one of the respective wireless access points and wireless clients in response to the fitness measure, so as to balance the distribution of load among the respective wireless access points.
    Type: Grant
    Filed: November 6, 2008
    Date of Patent: March 13, 2012
    Assignee: Cisco Technology, Inc.
    Inventors: David M. Theobold, Lu Qian
  • Patent number: 7873344
    Abstract: A system and method that enables efficient distribution of public warning information using a network infrastructure. Public warning messages are received by a wireless receiver coupled to a network. The wireless receiver broadcasts a message to users on the network responsive to receiving a public warning message.
    Type: Grant
    Filed: October 3, 2005
    Date of Patent: January 18, 2011
    Assignee: Cisco Technology, Inc.
    Inventors: Robert Bowser, David M. Theobold
  • Patent number: 7565169
    Abstract: A wireless access point and method of deploying is disclosed including a radio component for wirelessly communicating with at least one mobile client and a connection from the access point to a network. A directional orientation component is provided for obtaining the directional orientation of the access point with respect to a predetermined coordinate system. The predetermined coordinate system can be a local coordinate system of a predetermined bounded area or with respect to the directional vectors relative to Earth's coordinate system.
    Type: Grant
    Filed: December 10, 2002
    Date of Patent: July 21, 2009
    Assignee: Cisco Technology, Inc.
    Inventor: David M. Theobold
  • Patent number: 7541988
    Abstract: A wireless device is disclosed, including an antenna system comprising one or more antenna elements for sending and receiving a wireless signal. One or more conductive members are included, having an edge displaced from and substantially directed toward the at least one antenna element, and cooperating therewith to establish a multiplicity of hemispherical beam patterns for a wireless signal. Embodiments with a multiplicity of antenna elements exhibit a high degree of isolation between said antenna elements.
    Type: Grant
    Filed: December 6, 2006
    Date of Patent: June 2, 2009
    Inventors: John Sanelli, Stephen V. Saliga, David M. Theobold
  • Publication number: 20090059881
    Abstract: A load balancer is provided for balancing distribution of wireless clients among wireless access points. The load balancer includes a tracking implementation for tracking at least one telemetry parameter of each wireless client's wireless link with each respective wireless access point. A goal implementation is included for comparing one or more telemetry parameter against at least one predetermined goal to obtain a fitness measure. A control implementation is also provided for varying the operation of at least one of the respective wireless access points and wireless clients in response to the fitness measure, so as to balance the distribution of load among the respective wireless access points.
    Type: Application
    Filed: November 6, 2008
    Publication date: March 5, 2009
    Inventors: David M. THEOBOLD, Lu Qian
  • Patent number: 7457261
    Abstract: A wireless local area network is disclosed which includes a plurality of wireless access points each having a predetermined coverage area, and a plurality of wireless clients for establishing a wireless link with at least one wireless access point. Some or all of the wireless clients are within the respective coverage areas of at least a portion of wireless access points. A load balancer is provided for balancing distribution of wireless clients among wireless access points. The load balancer includes a tracking implementation for tracking at least one telemetry parameter of each wireless client's wireless link with each respective wireless access point. A goal implementation is included for comparing one or more telemetry parameter against at least one predetermined goal to obtain a fitness measure.
    Type: Grant
    Filed: July 30, 2003
    Date of Patent: November 25, 2008
    Inventors: David M. Theobold, Lu Qian
  • Patent number: 7436352
    Abstract: A method for radar protection. The method includes recording energy events and calculating differences in recorded energy events to determine pulses. The method further includes sorting intervals between pulses into histogram bins, each bin representing a range of time intervals between two pulses, each pulse indicative of a radar frequency and limiting network traffic on a frequency based on a selected bin count.
    Type: Grant
    Filed: April 19, 2007
    Date of Patent: October 14, 2008
    Inventors: David M. Theobold, Christopher G. Meil, Edward Frederick Wright, James A. Amos, Brian Hart, Jason R. Crawford, Philip O'Sullivan, Kevin C. H. Wong
  • Patent number: 7379519
    Abstract: The repetitive structure of a preamble signal is exploited to enhance timing synchronization performance and frame start detection performance under adverse channel conditions. Received values are cross-correlated in time against a known noise-free version of the preamble. The presence of peaks in the cross-correlation output indicates presence of a frame. The peak locations provide symbol timing. Further cross-correlation processing and/or non-linear processing can be used to enhance the signal to noise ratio of the peaks.
    Type: Grant
    Filed: December 15, 2005
    Date of Patent: May 27, 2008
    Assignee: Cisco Technology, Inc.
    Inventors: Michael Lewis, David M. Theobold
  • Patent number: 7352832
    Abstract: A method and implementation are disclosed for reducing signal distortion. A symbol detector is provided for establishing at least one decision boundary and assigning symbols extracted from a received signal to constellations of symbols separated by the at least one decision boundary. A quality measure implementation is provided for determining an error rate of the output of the symbol detector with respect to the at least one decision boundary. A boundary generator is provided for receiving the error rate and generating parameters that are fed back to the symbol detector to vary the decision boundary positions and shapes, so as to reduce the error rate of the symbol detector.
    Type: Grant
    Filed: February 24, 2003
    Date of Patent: April 1, 2008
    Assignee: Cisco Technology, Inc.
    Inventors: Michael E. Lewis, David M. Theobold
  • Patent number: 7315533
    Abstract: A method, apparatus, and carrier medium carrying instructions to assign frequency channels and transmit powers for a plurality of access points of a wireless network. The method includes, until there are no more access points to which to assign a transmit power and frequency channel, selecting a next current access point, determining for a set of at least one transmit power for a set of at least one frequency channel a measure of the quality of the sub-network formed by the current access point and all already-assigned access points an evaluation metric indicative of the quality of the sub-network, and assigning to the current access point the transmit power and frequency channel that minimizes the measure of the quality of the sub-network.
    Type: Grant
    Filed: April 8, 2005
    Date of Patent: January 1, 2008
    Assignee: Cisco Technology, Inc.
    Inventors: David M. Theobold, Lu Qian, Bretton Lee Douglas, Brian Hart
  • Publication number: 20070291947
    Abstract: A cryptographically controlled transmitter/receiver having transmission characteristics comprising a media access control layer having one or more media access parameters, a physical layer having one or more physical parameters, a radio frequency layer having one or more radio frequency parameters, a code generator configured to generate and send code words to at least one of the media access control layer, the physical layer, and the radio frequency layer, wherein at least one of the layers is configured to transmit and receive data and at least one of the other the layers is configured to input and output the data, and wherein at least one media access parameter, physical parameter, or radio frequency parameter is modified upon the receipt of the code.
    Type: Application
    Filed: June 9, 2007
    Publication date: December 20, 2007
    Inventor: David M. Theobold
  • Patent number: 7280082
    Abstract: A multiple element antenna array is disclosed in which a plurality of panels each support one or more antenna elements. One or more of the panels are preferably interlaced, so as to be affixed to a circuit board. The panels are configured so as to affix to the circuit board at a predetermined angle, which is preferably a right angle to the surface of the circuit board. Each antenna element includes a connection point for establishing a circuit board connection. The present multiple element antenna array is preferably incorporated into a wireless device; preferably an access point for a wireless local area network (WLAN). The wireless device further includes a radio transceiver comprising a plurality of circuit elements mounted on the circuit board.
    Type: Grant
    Filed: October 10, 2003
    Date of Patent: October 9, 2007
    Assignee: Cisco Technology, Inc.
    Inventors: David M. Theobold, Stephen V. Saliga
  • Patent number: 7230566
    Abstract: A method for radar protection. The method includes recording energy events and calculating differences in recorded energy events to determine pulses. The method further includes sorting intervals between pulses into histogram bins, each bin representing a range of time intervals between two pulses, each pulse indicative of a radar frequency and limiting network traffic on a frequency based on a selected bin count.
    Type: Grant
    Filed: August 3, 2004
    Date of Patent: June 12, 2007
    Assignee: Cisco Technology, Inc.
    Inventors: David M. Theobold, Christopher G. Meil, Edward Frederick Wright, James A. Amos, Brian Hart, Jason R. Crawford, Philip O′Sullivan, Kevin C. H. Wong
  • Patent number: 7202824
    Abstract: A wireless device is disclosed, including an antenna system comprising one or more antenna elements for sending and receiving a wireless signal. One or more conductive members are included, having an edge displaced from and substantially directed toward the at least one antenna element, and cooperating therewith to establish a multiplicity of hemispherical beam patterns for a wireless signal. Embodiments with a multiplicity of antenna elements exhibit a high degree of isolation between said antenna elements.
    Type: Grant
    Filed: October 15, 2003
    Date of Patent: April 10, 2007
    Assignee: Cisco Technology, Inc.
    Inventors: John Sanelli, Stephen V. Saliga, David M. Theobold
  • Patent number: 7119744
    Abstract: The difficulties and drawbacks of the previous-type systems are overcome by the present antenna system, alone and in combination with a wireless access point. The present antenna system includes a plurality of antenna elements for providing a respective plurality of communications signals over a wireless channel. An isolating structure is provided, selectively positioned with respect to the antenna elements, for selective varying signal isolation between the respective antenna elements. In this way, the present system is selectable between a high-throughput/short-range configuration and a low-throughput/long-range configuration.
    Type: Grant
    Filed: January 20, 2004
    Date of Patent: October 10, 2006
    Assignee: Cisco Technology, Inc.
    Inventors: David M. Theobold, Michael E. Lewis
  • Patent number: 7057566
    Abstract: A removable antenna assembly and wireless access point including the same is disclosed in which a plurality of antenna elements are provided for transmitting and receiving wireless signals over a plurality of wireless channels. A sectorized mounting structure is provided for retaining each of the plurality of antenna elements substantially in an antenna isolation configuration, so as to enable simultaneous sectorized signal communication of the antenna elements over the wireless channels. A removable network interface is provided for selectively enabling a signal connection between a radio digital interface component and the plurality of antennas.
    Type: Grant
    Filed: January 20, 2004
    Date of Patent: June 6, 2006
    Assignee: Cisco Technology, Inc.
    Inventor: David M. Theobold
  • Patent number: 7006587
    Abstract: The repetitive structure of a preamble signal is exploited to enhance timing synchronization performance and frame start detection performance under adverse channel conditions. Received values are cross-correlated in time against a known noise-free version of the preamble. The presence of peaks in the cross-correlation output indicates presence of a frame. The peak locations provide symbol timing. Further cross-correlation processing and/or non-linear processing can be used to enhance the signal to noise ratio of the peaks.
    Type: Grant
    Filed: November 20, 2001
    Date of Patent: February 28, 2006
    Assignee: Cisco Technolgy, Inc.
    Inventors: Michael Lewis, David M. Theobold
  • Patent number: 6933909
    Abstract: A wireless telecommunications device is disclosed including a plurality of wireless antennas, each respectively for transmitting and/or receiving wireless signals into a predetermined sector of an omnidirectional space. A mounting structure is included for retaining the respective plurality of wireless antennas, wherein the mounting structure is configured so as to isolate the respective wireless signals.
    Type: Grant
    Filed: March 18, 2003
    Date of Patent: August 23, 2005
    Assignee: Cisco Technology, Inc.
    Inventor: David M. Theobold
  • Publication number: 20040183726
    Abstract: A wireless telecommunications device is disclosed including a plurality of wireless antennas, each respectively for transmitting and/or receiving wireless signals into a predetermined sector of an omnidirectional space. A mounting structure is included for retaining the respective plurality of wireless antennas, wherein the mounting structure is configured so as to isolate the respective wireless signals.
    Type: Application
    Filed: March 18, 2003
    Publication date: September 23, 2004
    Inventor: David M. Theobold