Patents by Inventor Matthew Fischer

Matthew Fischer 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: 7324785
    Abstract: A method and apparatus for controlling transmit power of a wireless communication device includes processing that begins when a transmitting wireless communication device transmits a packet to a targeted wireless device via a wireless channel of a communication system at a 1st power level. The processing continues by having the targeted wireless device determining signal strength of the packet received via the wireless channel. The processing then continues when the targeted and/or transmitting device determines the adequacy of the 1st power level based on the determined signal strength. If the 1st power level is adequate, the transmitting wireless device continues to transmit information at the 1st power level. If, however, the 1st power level is not adequate, the transmitting communication device adjusts its transmit power up or down to provide an adequate power level.
    Type: Grant
    Filed: November 30, 2001
    Date of Patent: January 29, 2008
    Assignee: Broadcom Corporation
    Inventors: Christopher J. Hansen, Joonsuk Kim, Matthew Fischer, Rajugopal Gubbi
  • Publication number: 20070291707
    Abstract: Aspects of a method and system for bridging and routing offload in a multiport wireless system are presented. Various aspects of the system may include a wireless network interface subsystem that enables transcoding of at least a portion of a data packet received by the wireless network interface subsystem. The wireless network interface subsystem may enable transfer of the transcoded portion of the data packet from the wireless network interface subsystem to a wired network interface subsystem that is communicatively coupled thereto. The transcoded portion of the data packet may be compliant with a format utilized by the wired network interface subsystem.
    Type: Application
    Filed: June 16, 2006
    Publication date: December 20, 2007
    Inventors: Matthew Fischer, Raymond Hayes
  • Publication number: 20070263564
    Abstract: A method for multiple input multiple output wireless communication begins by determining protocols of wireless communication devices within a proximal region. The method continues by determining whether the protocols of the wireless communication devices within the proximal region are of a like protocol. The method continues by determining the number of transmit antennas. The method continues, when the protocols of the wireless communication devices within the proximal region are of the like protocol, formatting a preamble of a frame of the wireless communication utilizing at least one of cyclic shifting of symbols, cyclic shifting of tones, sparse tone allocation, and sparse symbol allocation based on the number of transmit antennas.
    Type: Application
    Filed: July 10, 2007
    Publication date: November 15, 2007
    Applicant: Broadcom Corporation, a California Corporation
    Inventors: Christopher Hansen, Jason Trachewsky, R. Moorti, Matthew Fischer, Christopher Young
  • Publication number: 20070226351
    Abstract: A system for transmitting data directly between a plurality of client network devices in a network is disclosed. The system may include a first client network device having a first client (“STA”) module and a second client network device of the plurality of client network devices where the second client network device includes a Dual Access Point and Station enabled device (“DAS-enabled device”).
    Type: Application
    Filed: September 27, 2006
    Publication date: September 27, 2007
    Inventors: Matthew Fischer, Stephen Ray Palm
  • Publication number: 20070217378
    Abstract: A receiver in a wireless local area network capable of receiving and processing plurality of frames that are separated by a reduced interframe spacing interval. . Upon receiving a frame, the receiver determines whether the received frame is using Reduced Interframe Spacing intervals. When the received frame includes a RIFS indicator, acknowledgment of the received frame is suppressed, and subsequent frames of the plurality of frames are received at a RIFS interval.
    Type: Application
    Filed: November 10, 2006
    Publication date: September 20, 2007
    Applicant: BROADCOM CORPORATION
    Inventors: RAJENDRA MOORTI, MATTHEW FISCHER, GEORGE KONDYLIS
  • Publication number: 20070206551
    Abstract: Providing wireless transmission, where in a first transmission mode, transmitting a plurality of frames using a first interframe spacing interval. When in a second transmission mode, transmitting the plurality of frames using a second interframe spacing interval, wherein the second interframe spacing is less than the first interframe spacing.
    Type: Application
    Filed: November 10, 2006
    Publication date: September 6, 2007
    Applicant: BROADCOM CORPORATION
    Inventors: RAJENDRA MOORTI, MATTHEW FISCHER, GEORGE KONDYLIS
  • Publication number: 20070206519
    Abstract: An RF transceiver includes a baseband processing module, a transmitter section, and a receiver section. The baseband processing module convert outbound data into a plurality of outbound symbol streams, wherein each of the plurality of outbound symbol streams is outputted as one or more frames, wherein a frame of the one or more frames includes a setup portion and a data portion, wherein the set up portion includes at least one of a training sequence field and a signal field, and wherein the set up portion is formatted in accordance with one of a plurality of protocols. The baseband processing module further converts a plurality of inbound symbol streams into inbound data. The transmitter section converts the plurality of the outbound symbol streams into a plurality of outbound RF signals. The receiver section converts a plurality of inbound RF signals into the plurality of inbound symbol streams.
    Type: Application
    Filed: May 7, 2007
    Publication date: September 6, 2007
    Applicant: Broadcom Cororation, a California Corporation
    Inventors: Christopher Hansen, Jason Trachewsky, R. Moorti, Matthew Fischer, Christopher Young
  • Publication number: 20070110055
    Abstract: Fast block acknowledgment generation is provided, via a receiving station, for a plurality of received frames to accommodate latency-sensitive data applications. The fast block acknowledgment generation includes receiving a frame of the plurality of received frames including a transmitter address, a quality of service (QoS) value, and a sequence number. A match to the transmitter address and the QoS value is conducted under a concurrent search to expedite access to a block acknowledgement (ACK) structure, the match provides an index to the block ACK structure. When a block ACK agreement exists that corresponds to the transmitter address and the QoS value, the block ACK structure is accessed based upon the index and storing an acknowledgement state for the received frame in a bitmap of the block ACK structure, and when receipt of the plurality of frames is complete, generating, queuing, and transmitting of a block ACK frame based upon the ACK policy field of the received frame.
    Type: Application
    Filed: November 10, 2006
    Publication date: May 17, 2007
    Applicant: BROADCOM CORPORATION
    Inventors: MATTHEW FISCHER, GEORGE KONDYLIS
  • Patent number: 7197631
    Abstract: A system and method for constructing a user application's Advanced Configuration and Power Interface (ACPI) namespace in a computer platform employing an ACPI-compatible implementation is disclosed. A traversing function is operable to traverse a kernel ACPI namespace nodal tree and provide the name of the node of the tree to the user application's ACPI namespace. The traversing function may withhold a copy of a particular node if that node is a control method object not included in a list of safe control methods. Another embodiment provides a scheme for assisting a user application's access to a control method object.
    Type: Grant
    Filed: December 23, 2002
    Date of Patent: March 27, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Matthew Fischer, Benjamin Preston, Raghuram Kota, Ajay Joshi
  • Publication number: 20070054683
    Abstract: A method and apparatus for dynamic frequency selection in a wireless communication system or network includes processing that begins when an access point determines interference on a wireless channel that is being used by the access point. When the interference exceeds an interference threshold, the access point provides a request packet to affiliated stations being serviced by the access point for channel spectrum information. The processing continues as the affiliated stations generate the channel spectrum information regarding each of the wireless channels in the wireless communication network. The processing proceeds then as the affiliated stations provide the channel spectrum information to the access point via the current wireless channel. The access point interprets the channel spectrum information to determine a desired wireless channel of the plurality of wireless channels within the wireless communication network.
    Type: Application
    Filed: November 9, 2006
    Publication date: March 8, 2007
    Inventors: Christopher Hansen, Joonsuk Kim, Matthew Fischer, Rajugopal Gubbi, Jason Trachewsky
  • Publication number: 20070036170
    Abstract: A method for collision avoidance in multiple protocol networks using a shared communication medium begins by determining a first protocol probable active time period. The method continues by determining a first protocol probable inactive time period. The method continues by generating a transmit blocking indication based on the first protocol probable active time period and the first protocol probable inactive time period.
    Type: Application
    Filed: October 10, 2006
    Publication date: February 15, 2007
    Applicant: Broadcom Corporation, a California Corporation
    Inventors: Mark Gonikberg, Matthew Fischer, Manoj George
  • Patent number: 7158759
    Abstract: A method and apparatus for dynamic frequency selection in a wireless communication system or network includes processing that begins when an access point determines interference on a wireless channel that is being used by the access point. When the interference exceeds an interference threshold, the access point provides a request packet to affiliated stations being serviced by the access point for channel spectrum information. The processing continues as the affiliated stations generate the channel spectrum information regarding each of the wireless channels in the wireless communication network. The processing proceeds then as the affiliated stations provide the channel spectrum information to the access point via the current wireless channel. The access point interprets the channel spectrum information to determine a desired wireless channel of the plurality of wireless channels within the wireless communication network.
    Type: Grant
    Filed: December 3, 2001
    Date of Patent: January 2, 2007
    Assignee: Broadcom Corporation
    Inventors: Christopher J. Hansen, Joonsuk Kim, Matthew Fischer, Rajugopal Gubbi, Jason A. Trachewsky
  • Publication number: 20060291544
    Abstract: A method for feeding back transmitter beamforming information from a receiving wireless communication device to a transmitting wireless communication device includes a receiving wireless communication device receiving a preamble sequence from the transmitting wireless device. The receiving wireless device estimates a channel response based upon the preamble sequence and then determines an estimated transmitter beamforming unitary matrix based upon the channel response and a receiver beamforming unitary matrix. The receiving wireless device then decomposes the estimated transmitter beamforming unitary matrix to produce the transmitter beamforming information and then wirelessly sends the transmitter beamforming information to the transmitting wireless device.
    Type: Application
    Filed: April 27, 2006
    Publication date: December 28, 2006
    Applicant: Broadcom Corporation, a California Corporation
    Inventors: Matthew Fischer, Joonsuk Kim, Christopher Hansen, Jason Trachewsky
  • Publication number: 20060245401
    Abstract: A method for coordinating multiple protocols using a shared communication medium by a plurality of networks begins by exchanging packets between a plurality of communication devices to obtain access to the shared communication medium, wherein the packets are formatted in accordance with at least one of the multiple protocols of at least one of the plurality of networks. The method continues by transmitting by at least one of the plurality of communication devices within another one of the plurality of networks via the shared communication medium.
    Type: Application
    Filed: June 26, 2006
    Publication date: November 2, 2006
    Applicant: Broadcom Corporation, a California Corporation
    Inventors: Matthew Fischer, Jason Trachewsky
  • Patent number: 7114064
    Abstract: A system and method for accessing an Advanced Configuration and Power Interface (ACPI) namespace nodal tree in a computer platform employing an ACPI-compatible implementation is disclosed.
    Type: Grant
    Filed: November 14, 2002
    Date of Patent: September 26, 2006
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Subramanian Ramesh, Matthew Fischer
  • Publication number: 20060212401
    Abstract: A method of operating a digital media purchase system includes, within the digital media purchase system, receiving a unique promotional code from one of a plurality of consumers via a data network. The receipt is in association with a user account of the one consumer with the digital media purchase system. A database associated with the media purchase system is processed to determine particular digital media items associated with the received one promotional code. A user account of the one consumer with the media purchase system is configured to enable access to the determined particular digital media from the media purchase system.
    Type: Application
    Filed: March 15, 2005
    Publication date: September 21, 2006
    Inventors: Debra Ameerally, Thomas Burkholder, Matthew Fischer, Patrice Gautier, Alexander Luke, Christopher Bell
  • Publication number: 20060203841
    Abstract: The present invention provides a method and apparatus for coordinating multiple protocols using a shared communication medium. Such a method and apparatus includes processing that begins by determining, by a first protocol module, that a second protocol module desires access to the shared communication medium, wherein the second protocol module operates in accordance with a second protocol. The processing continues by transmitting, by the first protocol module, at least a segment of a frame, wherein the at least the segment of the frame includes an indication of a duration that the shared communication medium will be accessed, wherein the frame is in accordance with a first protocol.
    Type: Application
    Filed: March 9, 2005
    Publication date: September 14, 2006
    Inventor: Matthew Fischer
  • Publication number: 20060153152
    Abstract: A method and system for a bandwidth efficient medium access control (MAC) protocol is provided, which may comprise communicating a request to transmit (RTS) signal to a receiving station to determine if a channel is available for transmission. A clear to send (CTS) acknowledgement signal may be received from the receiving station if the channel is available for transmission. A plurality of medium access control (MAC) protocol data unit (MPDU) fragments separated by a point coordination function (PCF) interframe space (PIFS) interval may be transmitted in response to the received CTS acknowledgement signal.
    Type: Application
    Filed: July 14, 2005
    Publication date: July 13, 2006
    Inventors: George Kondylis, Ling Su, Neal Nuckolls, Bruce Edwards, Matthew Fischer, Jason Trachewsky, Stephen Palm
  • Publication number: 20060069833
    Abstract: A computer-implemented method for handling pending interrupt vectors of a pending interrupt list is disclosed. The method includes batch-reading the set of pending interrupt vectors into a working list of working interrupt vectors. The method also includes performing interrupt handling of the working interrupt vectors using an interrupt handling arrangement until the working list is empty. The interrupt handling process permits a first incoming interrupt vector that is received by the pending interrupt list after the batch reading to temporarily interrupt the performing interrupt handling of the working interrupt vectors and to be handled on a priority basis by the interrupt handling arrangement if a priority level of the first incoming interrupt vector is higher than a priority level of a first working interrupt vector being currently handled by the interrupt handling arrangement.
    Type: Application
    Filed: September 27, 2004
    Publication date: March 30, 2006
    Inventors: Christopher Ruemmler, Matthew Fischer
  • Patent number: 7007160
    Abstract: A system and method for loading an Advanced Configuration and Power Interface (ACPI) original equipment manufacturer (OEM) description table in a computer platform employing an ACPI-compatible implementation is disclosed. In one embodiment of the system, a storage structure is operably associated with the computer platform and contains a copy of an ACPI OEM description table in a packed form. An acquirer is operable to search the storage structure fop the ACPI OEM description table and call a swapper to complete the loading of the ACPI OEM description table by issuing a signature search request.
    Type: Grant
    Filed: December 3, 2002
    Date of Patent: February 28, 2006
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Thavatchai Makphaibulchoke, Matthew Fischer, Subramanian Ramesh