Patents Assigned to Broadcom
  • Patent number: 8170607
    Abstract: A method for communication is disclosed and includes performing by one or more processors in a first access point, receiving a first messaging protocol message from a first switch. The first messaging protocol message is also communicated from the first switch to at least a second switch. A second messaging protocol message may be communicated to the second switch and/or a second access point based on the receiving of the first messaging protocol message. Operation of the first switch, the second switch, the first access point, the second access point, and/or at least one of a plurality of access devices may be controlled utilizing the first messaging protocol message and/or at least the second messaging protocol message. The first messaging protocol message may be generated by the first switch. The first messaging protocol message and the second messaging protocol message may be an access point status message.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: May 1, 2012
    Assignee: Broadcom Corporation
    Inventor: Richard Martin
  • Patent number: 8169365
    Abstract: A communication system includes a reference station and a mobile station. The reference station is operable to: receive GPS signals; generate GPS assisting data from the received GPS signals; receive SBAS signals; obtain SBAS data from the received SBAS signals; combine the GPS assisting data and the SBAS data to produce combined GPS data; and transmit the combined GPS data via a terrestrial wireless communication. The mobile station is operable to: receive the GPS signals; receive the combined GPS data via the terrestrial wireless communication; and generate positioning data from the mobile received GPS signals and the combined GPS data.
    Type: Grant
    Filed: December 22, 2008
    Date of Patent: May 1, 2012
    Assignee: Broadcom Corporation
    Inventor: Kambiz Shoarinejad
  • Patent number: 8169495
    Abstract: A method and apparatus for capturing an image depicting an area or region of interest. The method and apparatus use a large sensor, and a sampling function, which can be non-uniform, so that sensor cells depicting the region or object of interest are sampled more densely than other sensor cells, thus providing more details for the object or region of interest than to other areas, while still showing other areas for orientation and navigation purposes. The method and apparatus can be used for tracking the object or area of interest if either the area or object of interest, or the capturing device moves, by constantly adapting the densely sampled area on the sensor. The method and apparatus can be used for controlling the capturing device from a remote location.
    Type: Grant
    Filed: November 27, 2007
    Date of Patent: May 1, 2012
    Assignee: Broadcom Corporation
    Inventors: Ilia Vitsnudel, Ron Fridental
  • Patent number: 8170484
    Abstract: Synchronized UWB piconets for SOP (Simultaneously Operating Piconet) performance. A common backbone (either wired or wireless) is employed that provides a common CLK (clock signal) to all of the various PNCs (piconet coordinators) of various piconets that may operate within a sufficiently close region such that interference could undesirably occur. By providing a very reliable CLK signal from a common backbone to all of the PNCs of the various piconets operating within a substantially close proximity to one another, very precise synchronization may be ensured for all of the communications performed therein. The various piconets may then even operate using TDMA (Time Division Multiple Access)—whose performance would be substantially compromised without effective synchronization. In addition, combined TFC (time frequency code) and TDMA may also be employed to support the communications therein thereby providing even another degree of orthogonality that provided by TDMA alone.
    Type: Grant
    Filed: July 5, 2010
    Date of Patent: May 1, 2012
    Assignee: Broadcom Corporation
    Inventors: Jeyhan Karaoguz, Eric J. Ojard, Edward H. Frank
  • Patent number: 8170204
    Abstract: In a wireless communication system, a method and system for extending Advanced Encryption Standard (AES) operations for enhanced security are provided. In an AES encryption operation, an initial state may be modified by XORing with an initial modifier before a first processing round and a final state may be modified by XORing with a final modifier after a final processing round. The output of a MixColumns function performed during AES decryption operation rounds may be modified by XORing with a corresponding round modifier. In an AES decryption operation, an initial state may be modified by XORing with a decoded final modifier before a first processing round and a final state may be modified by XORing with a decoded initial modifier after a final processing round. The input of an InvMixColumns function performed during AES decryption operation rounds may be modified by XORing with a corresponding decoded round modifier.
    Type: Grant
    Filed: March 22, 2010
    Date of Patent: May 1, 2012
    Assignee: Broadcom Corporation
    Inventor: Xuemin Chen
  • Patent number: 8171383
    Abstract: Method and system for data-rate control by randomized bit-puncturing in communication systems. An encoder encodes at least one information bit thereby generating a group of encoded bits or an encoded frame. The encoder may be any type of encoder including a turbo encoder, an LDPC (Low Density Parity Check) encoder, a RS (Reed-Solomon) encoder, or other type of encoder. Any sub-portion of an encoded frame generated by such an encoder can be viewed as being a group of encoded bits. If the encoded frame is sub-divided into multiple groups of bits, each group can under processing in accordance with the means presented herein to effectuate rate matching. Based on a number of bits to be punctured from the group or frame generated by the encoder, a set of pointers and random-generated displacements is used to generate addresses for bits in the group or frame to be transmitted or punctured.
    Type: Grant
    Filed: April 11, 2008
    Date of Patent: May 1, 2012
    Assignee: Broadcom Corporation
    Inventors: Uri M. Landau, Mark Kent
  • Patent number: 8170497
    Abstract: An integrated circuit (IC) includes a die and a package substrate. The die includes circuit modules and an RF bus transceiver module and the package substrate includes a micro-electromechanical (MEM) area. The RF bus transceiver module includes a baseband processing module, a transmitter section, a receiver section, a transformer, an impedance matching circuit, and a transmission line. At least one of the transformer, the impedance matching circuit, and the transmission line is within the MEM area.
    Type: Grant
    Filed: October 5, 2009
    Date of Patent: May 1, 2012
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Patent number: 8171500
    Abstract: Systems and methods that support splitting a compute resource from its input/output and sharing among one or more users are provided. In one embodiment, a system that supports one or more user devices may include, for example, a compute engine, a first user device and a second user device. The compute engine may be adapted to provide virtualization. The virtualization may provide, for example, a first instance of a particular operating system and a second instance of the particular operating system. The first user device may be coupled to the compute engine and may access the first instance of the particular operating system. The second user device may be coupled to the compute engine and may access the second instance of the particular operating system. In one example, the user devices are input/output devices that do not run applications or operating systems.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: May 1, 2012
    Assignee: Broadcom Corporation
    Inventors: Uri El Zur, Gregory Young
  • Patent number: 8170019
    Abstract: A network device for processing packet. The network device includes an ingress module for performing switching functionality on an incoming packet, wherein the network device determines a destination port to which the incoming packet is to be transmitted. The network device also includes a CPU processing module for transmitting information between the network device and an external CPU. The external CPU transmits a formatted packet to the network device through the CPU processing module. The formatted packet includes module header and a data field. The ingress module uses information in a start field of the module header to determine that the incoming packet is a formatted packet and generates instructions for notifying other modules of the network device that the formatted packet is not to be modified by the network device and determines that the formatted packet is to be transmitted to a destination field in the formatted packet.
    Type: Grant
    Filed: March 28, 2005
    Date of Patent: May 1, 2012
    Assignee: Broadcom Corporation
    Inventors: Anupam Anand, John Jeffrey Dull
  • Patent number: 8171323
    Abstract: A system and method for regulating power consumption within an integrated circuit (IC) with a modular design. The IC is designed so that any one distinct functional module within the IC utilizes only transistors with a substantially same or similar critical voltage level, which may for example be the threshold voltage of the transistors. Consequently, the supply voltage delivered to each functional modules can be lowered to the minimum voltage necessary to enable the transistors within the module to operate. Similarly, modules within the IC may be designed with transistors which share a common value for a substrate bias voltage or a clock speed, or with a combination of common values for several electrical factors. In this way, it is possible to reduce power consumption by fine-tuning the voltages supplied to (or clock speeds driving) specific modules, in a way which is custom-tuned to each module.
    Type: Grant
    Filed: July 1, 2008
    Date of Patent: May 1, 2012
    Assignee: Broadcom Corporation
    Inventors: Vafa James Rakshani, Musaravakkam Samaram Krishnan
  • Publication number: 20120102341
    Abstract: A system and method of analyzing a powered device (PD) in a Power-over-Ethernet (PoE) system are presented. The system includes an Ethernet interface having a physical layer (PRY) chip capable of providing a signal pulse in addition to physical layer 1 functions. The system further includes a pulse transformer, coupled to the PRY chip, capable of relaying the signal pulse provided by the PRY chip to the PD via the transmit line and a second PRY chip. The first PRY chip receives one or more return pulse signals from the PD, analyzes characteristics such as voltage and/or frequency of the return pulse signal(s), and determines attributes of the PD based on those characteristics. The attributes can include powered device validity and power classification. A method of supplying power to a PD is also presented.
    Type: Application
    Filed: December 30, 2011
    Publication date: April 26, 2012
    Applicant: Broadcom Corporation
    Inventors: Asif HUSSAIN, Manisha Pandya, Farzan Roohparvar, John Perzow
  • Publication number: 20120102340
    Abstract: A communication device includes a memory module that stores a plurality of applications corresponding to a plurality of uses of the communication device. A processing module executes a selected one of the plurality of applications and selects one of a plurality of power modes based on a current one of the plurality of uses of the communication device corresponding to the selected one of the plurality of applications. The processing module generates a power mode signal based on the selected one of the plurality of power modes. A power management circuit receives the power mode signal and that generates a plurality of power supply signals based on the power mode signal.
    Type: Application
    Filed: December 26, 2011
    Publication date: April 26, 2012
    Applicant: BROADCOM CORPORATION
    Inventors: Yossi Cohen, Nelson R. Sollenberger, Vafa James Rakshani, Ahmadreza (Reza) Rofougaran, Maryam Rofougaran, Claude G. Hayek, Ferderic Christian Marc Hayem
  • Publication number: 20120101824
    Abstract: Systems and methods for enhancing the quality of an audio signal produced by an audio codec are described herein. In accordance with the systems and methods, a pitch-based pre-filter adaptively filters an input audio signal to produce a filtered audio signal. An audio encoder encodes the filtered audio signal to generate a compressed audio bit stream. An audio decoder decodes the compressed audio bit stream to generate a decoded audio signal. A pitch-based post-filter adaptively filters the decoded audio signal to produce an output audio signal, wherein adaptively filtering the decoded audio signal comprises undoing at least part of a signal-shaping effect of the pitch-based pre-filter.
    Type: Application
    Filed: June 29, 2011
    Publication date: April 26, 2012
    Applicant: BROADCOM CORPORATION
    Inventor: Juin-Hwey Chen
  • Publication number: 20120099497
    Abstract: Various example embodiments are disclosed. According to an example embodiment, an apparatus may include at least one processor and at least one memory. The at least one memory may include computer-executable code that, when executed by the processor, is configured to cause the apparatus to send a message to a node in wireless communication with the apparatus, the message indicating a transition by the apparatus from multiple-input multiple-output (MIMO) to single-input single-output (SISO), and transition from wireless MIMO communication with the node to wireless SISO communication with the node after sending the message to the node.
    Type: Application
    Filed: November 9, 2010
    Publication date: April 26, 2012
    Applicant: BROADCOM CORPORATION
    Inventors: Harish Vaidya, Rakesh Raman, Manoj Raveendranath Kamath
  • Publication number: 20120099667
    Abstract: A method for transmitting high rate data within a multiple input multiple output (MIMO) wireless local area network (WLAN) begins by determining a data transmission rate. The method continues by, when the data transmission rate is between a first data rate and a second data rate, enabling two transmission paths. The method continues by, for each of the two transmission paths, determining at least one of: level of constellation, number of data subcarriers, rate code, and cyclic prefix duration.
    Type: Application
    Filed: December 29, 2011
    Publication date: April 26, 2012
    Applicant: BROADCOM CORPORATION
    Inventor: Christopher J. Hansen
  • Patent number: 8164518
    Abstract: A GNSS enabled mobile device receives GNSS signals from visible GNSS satellites. Broadcast ephemeris is extracted from the received GNSS signals for generating ephemeris extension (future ephemeris) in the next several days for each of the visible GNSS satellites. The GNSS enabled mobile device uses the generated future ephemeris to determine a position fix even without fresh broadcast ephemeris completely received from the visible GNSS satellites. The generation of future ephemeris is scheduled according to the age of available ephemeris extensions and/or the time of visibility. Available ephemeris such as extracted broadcast ephemeris are integrated into an orbit model using the multi-step numerical integration methods and propagated to generate future ephemeris. The generated future ephemeris is reformatted into a desired orbit model and/or format of the GNSS enabled mobile device.
    Type: Grant
    Filed: June 19, 2009
    Date of Patent: April 24, 2012
    Assignee: Broadcom Corporation
    Inventors: Frank van Diggelen, Hongming Li
  • Patent number: 8165220
    Abstract: A method and apparatus are provided for implementing an enhanced reduced memory mode (RMM) of decoding HDTV MPEG-2 video stream. In one instance, the RMM mode is adaptively enabled with up/down conversion by using the picture-type information. In another instance, the RMM mode is provided by performing anchor-frame compression/decompression by using adaptive DPCM technique with picture-type information. The quantization (PCM) tables are generated using the Lloyd algorithm. Further, the predictor for each pixel is determined by a use of the Graham rule.
    Type: Grant
    Filed: January 20, 2009
    Date of Patent: April 24, 2012
    Assignee: Broadcom Corporation
    Inventors: Sherman (Xuemin) Chen, Jason Demas, Sandeep Bhatia
  • Patent number: 8165142
    Abstract: A method and apparatus supporting the handling of multimedia information using simulcasting using a broadband access gateway are disclosed. A broadband access gateway supporting both a personal area network and a broadband network may receive multimedia information during exchanges between access devices over a wireless wide area network. The wireless wide area network may intercept multimedia information, and may, for example, determine that the access device of the recipient is incompatible with the multimedia information. The wide area network may then redirect the multimedia information to a broadband access gateway that may cause the storage of the received multimedia information. In another representative embodiment of the present invention, the wide area network may adapt intercepted multimedia information to be compatible with the access device of the recipient, and may also redirect the original intercepted multimedia information to a broadband access gateway.
    Type: Grant
    Filed: March 4, 2010
    Date of Patent: April 24, 2012
    Assignee: Broadcom Corporation
    Inventors: Jeyhan Karaoguz, James D. Bennett, Nambirajan Seshadri
  • Patent number: 8165155
    Abstract: In a computing system, a method and system for a thin client and blade architecture are provided. A blade may generate video, audio, and peripheral control information that may be transmitted to a thin client (TC) by utilizing a video encoder, an audio bridge, and a peripheral bridge. Communication between the blade and the TC may occur based on a communication protocol that may operate independently of an operating system and/or applications running on the blade. The video encoder may dynamically compress the video information according to network capacity and/or video content and may dynamically select from various compression algorithms. The blade may configure and manage operations that interface with the TC. The TC may comprise a video decoder, a transceiver, a processor, a video display bridge, an audio bridge, and a peripheral bridge and may be adapted to communicate with peripheral devices.
    Type: Grant
    Filed: July 1, 2005
    Date of Patent: April 24, 2012
    Assignee: Broadcom Corporation
    Inventors: Alexander MacInnis, Uri El Zur
  • Patent number: 8165525
    Abstract: A method, apparatus, and system for using Bluetooth devices to secure sensitive data on other Bluetooth devices is described. A Bluetooth device is paired with a “trusted” Bluetooth device. When contact with the trusted device is lost, designated sensitive data on the secured Bluetooth device is automatically encrypted. When contact is restored, the data is automatically decrypted. In an alternate embodiment, a secured device can be associated with multiple trusted devices, and the secured device designate different sensitive data for each trusted device. In this way, multiple users can share a common, “public” Bluetooth device without concern that the other users will access their sensitive data on the device when the device is not being used by that user.
    Type: Grant
    Filed: August 23, 2011
    Date of Patent: April 24, 2012
    Assignee: Broadcom Corporation
    Inventor: Andre Eisenbach