Patents Assigned to Broadcom Corporation
  • Method of aiding uplink beamforming transmission
    Patent number: 8259672
    Abstract: A method and apparatus of aiding uplink beamforming transmission is disclosed. One method includes a base station downlink transmitting beamformed signals to at least a first terminal, the beam formed signals directed and conveying data to at least the first terminal. The method further includes a second terminal eavesdropping the transmitted beamformed signals, and measuring a signal quality. The second terminal estimates uplink channel information based on the measured signal quality, for aiding uplink transmission. Based at least in part on the estimated transmission channel, the second terminal transmits beamformed uplink signals to the base station.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: September 4, 2012
    Assignee: Broadcom Corporation
    Inventors: Bertrand Hochwald, Harold Artes
  • Method and system for tracking battery state-of-health based on charging information
    Patent number: 8258751
    Abstract: Methods, systems, and apparatuses for determining battery state of health are provided. A battery that is substantially uncharged is charged with a substantially constant charge current. A time duration of the charging of the battery with the substantially constant charge current is determined. A state of health of the battery is estimated based upon the determined time duration and the constant charge current. The state of health of the battery may be calculated by multiplying the determined time duration with a value of the constant charge current to determine a total accumulated charge, and applying a predetermined factor to the accumulated charge to determine the state of health. The predetermined factor is a fixed percentage of the total charge capacity of the battery that corresponds to the battery type.
    Type: Grant
    Filed: January 23, 2008
    Date of Patent: September 4, 2012
    Assignee: Broadcom Corporation
    Inventor: Domitille Esnard
  • System and method for processing data using a network
    Patent number: 8259121
    Abstract: Systems and methods are disclosed for video processing modules. More specifically a network is disclosed for processing data. The network comprises a register DMA controller adapted to support register access and at least one node adapted to the data. At least one link communicates with the node, and is adapted to transmit data and at least one network module communicates with at least the link, and is adapted to route data to at least the link.
    Type: Grant
    Filed: December 9, 2002
    Date of Patent: September 4, 2012
    Assignee: Broadcom Corporation
    Inventors: Patrick Law, Darren Neuman, David Baer
  • Method and system for a fast drop recovery for a TCP connection
    Patent number: 8259728
    Abstract: Methods and systems for a fast drop recovery for a TCP connection are disclosed. Aspects of one method may include a receiving device on a network receiving an out-of-order data. The receiving device may then signal to a transmitting device on the network, which sent the out-of-order packet, to enter a congestion alleviation mode without waiting for a delay period. The network packet transfer may be via TCP protocol, for example. The delay period may comprise a retransmission time-out period if the receiving device does not save isles. If the receiving device does save one or more isles, the delay period may be a period associated with delayed ACK. The signal may comprise a TCP option and/or an available TCP flag. The signal may also comprise, for example, three duplicate ACKs. Other similar signals may be used for networks that use other protocols than TCP.
    Type: Grant
    Filed: September 25, 2007
    Date of Patent: September 4, 2012
    Assignee: Broadcom Corporation
    Inventors: Shay Mizrachi, Eliezer Aloni, Patricia Thaler, Pavel Anissimov, Dov Hirshfeld
  • Method and system for drift reduction in a low power oscillator (LPO) utilized in a wireless communication device
    Patent number: 8258881
    Abstract: A radio circuit may be driven by a high frequency oscillator such as a crystal oscillator that may have sleep and wake time intervals. The sleep time interval length may be adjusted. A low frequency oscillator or low power oscillator (LPO) that may experience frequency drift may regulate the sleep and/or wake time intervals. The frequency drift may be detected based on two or more LPO calibrations and/or one or more clock adjustments. The LPO frequency drift may be detected based on an LPO frequency sampled after a first LPO calibration and a corresponding LPO clock adjustment, a second LPO frequency sampled after a second LPO calibration and a time interval between the two frequency samples. The LPO may be calibrated based on the HFCXO output. Sleep time intervals may be adjusted by adding and/or subtracting a time interval to an expected time to wake the radio circuit.
    Type: Grant
    Filed: March 13, 2009
    Date of Patent: September 4, 2012
    Assignee: Broadcom Corporation
    Inventor: John Walley
  • Switching network employing a user challenge mechanism to counter denial of service attacks
    Patent number: 8259727
    Abstract: A communication infrastructure includes an intermediate routing node that routes a plurality of packets between a source device and a plurality of destination devices, a plurality of templates stored on the intermediate routing node and a service function. The intermediate routing node, e.g., a switch, router, access point, bridge, or gateway, identifies packets containing requests for a webpage, the requests being a service attack attempt by comparing the packet with the plurality of templates. Then, the intermediate routing node denies service attack by interacting with the server and client devices. That is, the intermediate routing node sends messages with challenge mechanism to the server, based on the response or otherwise, sends messages and anti-service attack downloads to the client devices and receives response.
    Type: Grant
    Filed: June 28, 2010
    Date of Patent: September 4, 2012
    Assignee: Broadcom Corporation
    Inventor: James D. Bennett
  • Power consumption management in a MIMO transceiver and method for use therewith
    Patent number: 8259610
    Abstract: A mobile communication device includes a first wireless transceiver that receives a first inbound RF signal and that transmits a first outbound RF signal based on a first power supply signal. A second wireless transceiver receives a second inbound RF signal and that transmits a second outbound RF signal based on a second power supply signal. A processing module generates at least one power mode signal based on first transmit power control data received via the first inbound RF signal. A power management circuit adjusts a first power consumption parameter of the first power supply signal and a second power consumption parameter of the second power supply signal based on the at least one power mode signal.
    Type: Grant
    Filed: January 25, 2012
    Date of Patent: September 4, 2012
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Method and system for timely delivery of multimedia content via a femtocell
    Patent number: 8259617
    Abstract: Aspects of a method and system for timely delivery of multimedia content via a femtocell are provided. In this regard, a femtocell may receive data via an upstream path and transmit data via a downstream path. One of the upstream path and downstream path may comprise a cellular path and the other may comprise a non-cellular path. One or both of the upstream path and the downstream path may be audio video bridging (AVB) paths. Data may be stored in the femtocell based on timing characteristics of one or both of the upstream path and the downstream path. Data may be delivered to the femtocell utilizing best effort delivery and the data may be forwarded by the femtocell with guaranteed quality of service. Resources in the femtocell may be reserved and/or synchronized, utilizing AVB protocols, for communication of one or more data streams.
    Type: Grant
    Filed: March 18, 2009
    Date of Patent: September 4, 2012
    Assignee: Broadcom Corporation
    Inventors: Charles Abraham, Xuemin Sherman Chen, Wael William Diab, Vinko Erceg, Victor T. Hou, Jeyhan Karaoguz, Mark Kent
  • High-speed decoder for a multi-pair gigabit transceiver
    Patent number: 8259787
    Abstract: A method and a system for providing an input signal from a multiple decision feedback equalizer to a decoder based on a tail value and a subset of coefficient values received from a decision-feedback equalizer. A set of pre-computed values based on the subset of coefficient values is generated. Each of the pre-computed values is combined with the tail value to generate a tentative sample. One of the tentative samples is selected as the input signal to the decoder. In one aspect of the system, tentative samples are saturated and then stored in a set of registers before being outputted to a multiplexer which selects one of the tentative samples as the input signal to the decoder.
    Type: Grant
    Filed: December 8, 2009
    Date of Patent: September 4, 2012
    Assignee: Broadcom Corporation
    Inventors: Oscar E. Agazzi, David Kruse, Arthur Abnous, Mehdi Hatamian
  • Method and system for OFDM based MIMO system with enhanced diversity
    Patent number: 8259834
    Abstract: Certain aspects of a method and system for orthogonal frequency division multiplexing (OFDM) based multi-input multi-output (MIMO) system having enhanced diversity are disclosed. Aspects of one method may include selecting a group of antennas from a plurality of antennas within a radio frequency (RF) system. Data may be communicated via the selected group of antennas. The selected group of antennas may comprise at least one polarized antenna that is orthogonally polarized with respect to adjacent polarized antennas. The plurality of coherently polarized antennas may be placed at a particular distance from each other.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: September 4, 2012
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza Rofougaran
  • Method and system for satellite communication
    Patent number: 8259852
    Abstract: Certain aspects of a method and system for satellite communication are disclosed. Aspects of one method may include a receiver that handles digital video broadcasting. The receiver may be enabled to dynamically vary spacing between one or more pilots within at least one frame based on a determined symbol rate. The size of each of a plurality of received programs may be determined and the spacing between one or more pilots may be dynamically varied based on the determined size of each of the plurality of received programs.
    Type: Grant
    Filed: March 28, 2007
    Date of Patent: September 4, 2012
    Assignee: Broadcom Corporation
    Inventor: Tommy Yu
  • Transceiver with selective beamforming antenna array
    Patent number: 8260360
    Abstract: A multiple mode RF transmitter a baseband section, a transmitter section, and a configurable antenna circuit. The transmitter section is couple to convert a first outbound symbol stream into first outbound RF beamforming signals in accordance with a first beamforming setting and convert a second outbound symbol stream into second outbound RF beamforming signals in accordance with a second beamforming setting. The configurable antenna circuit is coupled to provide a first antenna assembly for transmitting the first outbound RF beamforming signals and provide a second antenna assembly for transmitting the second outbound RF beamforming signals.
    Type: Grant
    Filed: June 22, 2007
    Date of Patent: September 4, 2012
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Reza Rofougaran, Maryam Rofougaran
  • Method and system for automatically establishing a dial-up connection to a network through a mobile device
    Patent number: 8260248
    Abstract: There is provided a method for use by a computing device for automatically establishing a dial-up connection to a network through a mobile device. The method includes establishing a communication link with a mobile device. For example, the mobile device can be a cellular telephone and the communication link can be a Bluetooth communication link. The method further includes receiving network identification data from the mobile device, where the network identification data indicates the type of the network, e.g., Global System for Mobile (“GSM”) communications or Code Division Multiple Access (“CDMA”). The method further includes configuring a dial-up connection entry in the computing device and configuring connection entry in the mobile device based on the type of the network, and establishing the dial-up connection to the network using the dial-up connection entry.
    Type: Grant
    Filed: July 27, 2007
    Date of Patent: September 4, 2012
    Assignee: Broadcom Corporation
    Inventors: Victor Zhodzishsky, Ron Wong
  • Media Controller with Fingerprint Recognition
    Publication number: 20120219193
    Abstract: A system and method for retaining, associating, and reloading a user's preferences in a video game system without requiring active participation from the user is provided. The system may include an object control mechanism for receiving a passive indication from the user to perform a fingerprint scan of the user's fingertip. A fingerprint scanner may be coupled to the object control mechanism for transparently performing the fingerprint scan to generate identifying data for the user. If the identifying data for the user matches identifying data for a preexisting user, then preferences associated with the preexisting user may be reloaded. If the identifying data for the user does not match identifying data for a preexisting user, then preferences of the user may retained and associated with the user's identifying data.
    Type: Application
    Filed: May 8, 2012
    Publication date: August 30, 2012
    Applicant: Broadcom Corporation
    Inventor: Michael James MUTH
  • Flexible MAC/PHY Association
    Publication number: 20120218995
    Abstract: A system and method for allowing flexible associations between PHY devices and MAC devices in a point-to-multipoint communications system, such that a given upstream channel is not deterministically bound to a particular MAC device. An upstream MAC device may connect to a varying number of PHY devices depending on configured PHY capacity. Upstream service flows are intact by noting Service identifiers (SIDs) of each burst received at a PHY device, A burst is then directed via a switching infrastructure to the appropriate MAC on the basis of the SID.
    Type: Application
    Filed: May 7, 2012
    Publication date: August 30, 2012
    Applicant: Broadcom Corporation
    Inventor: Niki PANTELIAS
  • Offset calibration for amplifiers
    Patent number: 8253470
    Abstract: An apparatus, a method, and a system are provided to calibrate an offset in an amplifier. The apparatus can include an amplifier, a voltage control unit, a comparator, and a processing unit. The amplifier can have four terminals: a positive differential input (VIN+), a negative differential input (VIN?), a positive differential output (VOUT+), and a negative differential output (VOUT?). The voltage control unit can be configured to adjust a first voltage on VOUT+ and a second voltage on VOUT?. The comparator can be configured to compare the first voltage on VOUT+ to the second voltage on VOUT? when VIN+ and VIN? are coupled to a common voltage. Further, the processing unit can be configured to provide a control signal to the voltage control unit based on the comparison of the first and second voltages on VOUT+ and VOUT?, respectively.
    Type: Grant
    Filed: September 14, 2010
    Date of Patent: August 28, 2012
    Assignee: Broadcom Corporation
    Inventor: Jan Mulder
  • Efficient background audio encoding in a real time system
    Patent number: 8255226
    Abstract: Presented herein is efficient background encoding/trancoding in a real time multimedia system. Encoding/trancoding of audio data is achieved by decoding a first audio frame; executing at least one encoding task on a second audio frame, resulting in a partially encoded second audio frame, after decoding the first audio frame; decoding a third audio frame, after executing the at least one encoding task; and executing at least another encoding task on the partially encoded second audio frame, after decoding the third audio frame.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: August 28, 2012
    Assignee: Broadcom Corporation
    Inventor: Manoj Singhal
  • RFID system with RF bus
    Patent number: 8254834
    Abstract: A radio frequency identification (RF) system includes an RF reader, an RF tag, and a network connection module. The RF reader includes a reader radio frequency (RF) bus transceiver. The network connection module includes a network connection RF bus transceiver, wherein the reader RF bus transceiver exchanges at least one of inbound RF data and outbound RF data with the network RF bus transceiver via an RF bus.
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: August 28, 2012
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Method and system for SFBC/STBC in a communication diversity system using angle feedback
    Patent number: 8254507
    Abstract: Aspects of a system for STBC/SFBC in a communication system using angle feedback may include a receiver, which enables reception of signals via a plurality of receiving antennas. The receiver may enable computation of a rotation factor value based on the received signals and utilization of the computed rotation factor value to receive subsequent signals via the plurality of receiving antennas. The received signals may comprise preamble data. The receiver may enable computation of channel estimate values based on the received preamble data. A rotation angle value may be computed based on the computed channel estimate values. The rotation factor value may be computed based on the computed rotation angle value. The receiver may enable transmission of feedback information comprising the computed rotation factor and/or the computed rotation angle.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: August 28, 2012
    Assignee: Broadcom Corporation
    Inventors: Joonsuk Kim, Sirikiat Ariyavisitakul, Nambirajan Seshadri
  • Resource controlled user interface resource management
    Patent number: 8255804
    Abstract: A system and method for managing the allocation and utilization of user interface resources in a communication system. Various aspects of the present invention comprise establishing a wireless communication link between a user interface resource and a system with which the user interface resource may be used. It may be determined that at least a portion of the user interface resource may be used with the system. Various aspects of the present invention may communicate that at least a portion of the user interface resource may be used with the system. A request may be made that at least a portion of the user interface resource be allocated for use with the system. The allocation request may be received, and at least a portion of the user interface resource may be allocated for use with the system. The allocated user interface resource may be utilized with the system.
    Type: Grant
    Filed: June 23, 2004
    Date of Patent: August 28, 2012
    Assignee: Broadcom Corporation
    Inventors: Jeyhan Karaoguz, James D. Bennett