Patents Assigned to Broadcom
  • Publication number: 20100254537
    Abstract: A method and system for secure and scalable key management for cryptographic processing of data is described herein. In the method, a General Purpose Cryptographic Engine (GPE) receives key material via a secure channel from a key server and stores the received Key encryption keys (KEKs) and/or plain text keys in a secure key cache. When a request is received from a host to cryptographically process a block of data, the requesting entity is authenticated using an authentication tag included in the request. The GPE retrieves a plaintext key or generate a plaintext using a KEK if the authentication is successful, cryptographically processes the data using the plaintext key and transmits the processed data. The system includes a key server that securely provides encrypted keys and/or key handles to a host and key encryption keys and/or plaintext keys to the GPE.
    Type: Application
    Filed: April 6, 2009
    Publication date: October 7, 2010
    Applicant: Broadcom Corporation
    Inventors: Mark BUER, Zheng QI
  • Publication number: 20100257381
    Abstract: An apparatus and method for multi-point detection in a power source equipment (PSE) device is provided. During multi-point detection, a series of at least four currents is sequentially applied to a link port of the PSE device. Each current is applied during a different measurement interval. A voltage measurement sample is obtained for each of the measurement intervals. A difference in voltage between alternating voltage samples is determined and used by a detection module to determine whether a valid power device is coupled to the link port of the PSE.
    Type: Application
    Filed: April 5, 2010
    Publication date: October 7, 2010
    Applicant: BROADCOM CORPORATION
    Inventors: Agnes Woo, Anil Tammineedi, Ichiro Fujimori, David Chin, John Perzow
  • Patent number: 7809408
    Abstract: Aspects of a method and system for a power switch with a slow in-rush current are presented. Aspects of the system may include at least one resistive component, which is coupled between an input control signal and an output stage circuit of a power switch circuit, so as to limit a peak transient current level, which may result from in-rush current delivered by the power switch circuit to a load impedance circuit during a transient time interval during which a voltage level across the load impedance circuit may rise or fall from an initial voltage level to a quiescent voltage level.
    Type: Grant
    Filed: December 28, 2006
    Date of Patent: October 5, 2010
    Assignee: Broadcom Corporation
    Inventor: Chungyeol Paul Lee
  • Patent number: 7808901
    Abstract: Systems and methods that provide satellite-based media processing are described. In one embodiment, a system that exchanges media may include, for example, a communications device that may be coupled to a network and to an antenna. The communications device may provide two-way communications with the network and may provide one-way communications with the antenna. The communications may receive media content from the antenna and/or the network. The communications device may send the media content to the network.
    Type: Grant
    Filed: November 10, 2008
    Date of Patent: October 5, 2010
    Assignee: Broadcom Corporation
    Inventors: Jeyhan Karaoguz, James D. Bennett
  • Patent number: 7809092
    Abstract: Aspects of a method and system for UMTS HSDPA Shared Control Channel processing may include calculating at a receiver, for each one of a plurality of control channels, a quality metric derived from at least one Viterbi Decoder state metric. A control channel may be selected on the basis of the quality metrics, where the quality metric is selected that provides maximum confidence. The selected control channel may be chosen if its corresponding 3GPP metric is greater than a specified threshold, where the threshold is a design parameter. A validity of a selected control channel may be determined based on consistency and a CRC, where the CRC may be derived from decoding a sub-frame. The calculating and selecting may be done for a first slot of a sub-frame for High-Speed Shared Control Channels.
    Type: Grant
    Filed: November 30, 2006
    Date of Patent: October 5, 2010
    Assignee: Broadcom Corporation
    Inventors: Li Fung Chang, Hongwei Kong
  • Patent number: 7809049
    Abstract: An integrated circuit includes a baseband processing module, an RF section, and an interface module. The baseband processing module converts an outbound voice signal into an outbound voice symbol stream; converts an inbound voice symbol stream into an inbound voice signal; converts outbound data into an outbound data symbol stream; converts an inbound data symbol stream into inbound data; converts outbound image/video data into an outbound image/video symbol stream; and converts an inbound image/video symbol stream into inbound image/video data.
    Type: Grant
    Filed: February 26, 2007
    Date of Patent: October 5, 2010
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Patent number: 7809329
    Abstract: A device includes a plurality of ICs and an RF bus structure. Each IC includes a plurality of circuit modules, a switching module, an RF bus transceiver, an antenna interface, and an antenna structure. The switching module provides controlled access to the RF bus transceiver, which communicates via the RF bus structure, among the plurality of circuit modules for external IC communications and provides connectivity among the circuit modules for internal IC communications.
    Type: Grant
    Filed: January 31, 2007
    Date of Patent: October 5, 2010
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Patent number: 7810152
    Abstract: Systems and methods that may securely control access to device functions are disclosed. A request is received to enable a feature of the device. In one embodiment, the device may be a set top box, for example. The device determines whether the feature is disabled, whether the feature can be enabled with authorization and whether a requester is authorized to enable the feature of the device. If the feature is disabled, if the feature can be enabled with authorization and if the requester is authorized to enable the feature of the device, then the feature of the device is enabled.
    Type: Grant
    Filed: May 8, 2002
    Date of Patent: October 5, 2010
    Assignee: Broadcom Corporation
    Inventor: Jeffrey Douglas Carr
  • Patent number: 7809333
    Abstract: Method for streaming data over a plurality of data links formed between a Bluetooth® master device and a plurality of Bluetooth® slave devices includes constructing a vendor specific command host controller interface (HCI) packet, sending the vendor specific command HCI packet to a host controller of the Bluetooth® master device, and constructing at least one baseband packet addressed to each slave device of the plurality of slave devices. The vendor specific command HCI packet includes a plurality of ACL headers, a plurality of L2CAP headers, and a payload. A Bluetooth®-enabled device configured to stream data over a plurality of data links formed between a plurality of slave devices includes a Bluetooth®-enabled host adapted to construct a vendor specific command host controller interface (HCI) packet, an HCI transport layer and a host controller adapted to receive the vendor specific command HCI packet over the HCI transport layer.
    Type: Grant
    Filed: December 7, 2006
    Date of Patent: October 5, 2010
    Assignee: Broadcom Corporation
    Inventor: Michael Jougit
  • Patent number: 7809375
    Abstract: A home wireless router establishes a Wireless Local Area Network (WLAN) that supports wireless communications within a WLAN service area. The home wireless router further establishes broadband communications via a broadband connection with a VoIP service accumulator. The home wireless router services a plurality of wireless terminals within the WLAN service area, including at least one Voice over Internet Protocol (VoIP) wireless terminal. The home wireless router determines that a VoIP wireless terminal desires VoIP call servicing. The home wireless router sends a bandwidth reservation request to the VoIP service accumulator to reserve capacity on the broadband connection for servicing of the VoIP call. The home wireless router then receives a bandwidth reservation response from the VoIP service accumulator to confirm reservation of capacity on the broadband connection for servicing of the VoIP call.
    Type: Grant
    Filed: May 14, 2004
    Date of Patent: October 5, 2010
    Assignee: Broadcom Corporation
    Inventor: Jeffrey L. Thermond
  • Patent number: 7809870
    Abstract: Certain aspects of a method and system for interlocking data integrity for network adapters are disclosed. Aspects of one method may include executing a plurality of interlocking checks within a network adapter. Each interlocking check may comprise receiving a plurality of input check values associated with a plurality of input data packets corresponding to a first protocol. A plurality of check values may be generated which are associated with the plurality of input data packets and a plurality of output data packets corresponding to a second protocol. The data integrity of the plurality of input data packets and the plurality of output data packets may be validated based on one or more comparisons between one or more of the generated plurality of check values and one or more of the received plurality of input check values.
    Type: Grant
    Filed: October 17, 2007
    Date of Patent: October 5, 2010
    Assignee: Broadcom Corporation
    Inventor: Scott McDaniel
  • Patent number: 7809832
    Abstract: A method and system for processing a data flow in a multi-channel, multiservice environment is described. In one embodiment, a socket is dynamically allocated, the socket including a dynamically allocated service. Further, the server processes the data flow based upon the type of data being processed.
    Type: Grant
    Filed: June 25, 2008
    Date of Patent: October 5, 2010
    Assignee: Broadcom Corporation
    Inventors: Viresh Rustagi, Robert S. French, Gareld H. Banta
  • Patent number: 7809091
    Abstract: Aspects of a method and system for decoding single antenna interference cancellation (SAIC) and redundancy processing adaptation using frame process are provided. A receiver may decode video, voice, and/or speech bit sequences based on a first decoding algorithm that may utilize data redundancy and that may impose physical constraints. The receiver may also decode a bit sequence based on a second decoding algorithm that utilizes SAIC. The first and second decoding algorithms may be adapted to perform in parallel and a decoded received bit sequence may be selected based on a redundancy verification parameter. The first and second decoding algorithms may also be adapted to be performed sequentially where the subsequent decoding operation may be conditioned to the initial decoding operation. Moreover, either the first or the second decoding algorithm may be selected for decoding the received bit sequence. The selection may be based on noise and/or interference measurements.
    Type: Grant
    Filed: January 5, 2006
    Date of Patent: October 5, 2010
    Assignee: Broadcom Corporation
    Inventors: Huaiyu (Hanks) Zeng, Jie Lai, Yueheng Sun, Nelson Sollenberger, Arie Heiman, Yossy Pruzanski
  • Patent number: 7809096
    Abstract: The present invention provides a method of processing radio frequency (RF) bursts dependent on a speech mode associated with data contained within the RF burst. Different voice modes, full rate, half rate, and adaptive multi-channel rates each may require different signal to noise ratio (SNR) conditions in order to be successfully processed. To improve the equalization of the received RF burst(s), the SNR associated with the burst is estimated. Then based on the SNR or other related conditions (i.e. the presence or absence of colored noise, and the estimated channel profile) a decision can be made as to whether or not an interference cancellation burst process should be implemented.
    Type: Grant
    Filed: June 13, 2005
    Date of Patent: October 5, 2010
    Assignee: Broadcom Corporation
    Inventors: Arkady Molev-Shteiman, Nelson R. Sollenberger, Huaiyu (Hanks) Zeng
  • Patent number: 7809043
    Abstract: Aspects of a method and system for a flexible automatic frequency control (AFC) design supporting transmit diversity are presented. Aspects of the system may include one or more circuits that enable computation of at least one frequency error value based on one or more previous computed frequency error values, current received symbols, and/or corresponding previously received symbols. A weighted sum may be computed from a plurality of computed frequency error values. A current demodulation frequency may be adjusted based on the computed weighted sum. The adjusted demodulation frequency may be utilized for receiving one or more subsequent symbols.
    Type: Grant
    Filed: November 30, 2006
    Date of Patent: October 5, 2010
    Assignee: Broadcom Corporation
    Inventors: Nelson Sollenberger, Zoran Kostic, Joseph Boccuzzi
  • Patent number: 7809011
    Abstract: A method and apparatus are provided for establishing communication between entities in a communication system. The time required to establish network connectivity for CPE devices can be reduced by prioritizing and/or reducing contention between the CPE devices. The CPE devices can be divided into acquisition groups and assigned specific upstream channels on which to range. The CPE devices can randomly or pseudo-randomly range on upstream channels.
    Type: Grant
    Filed: April 5, 2005
    Date of Patent: October 5, 2010
    Assignee: Broadcom Corporation
    Inventors: Thomas J. Quigley, Lisa V. Denney
  • Patent number: 7809902
    Abstract: Provided is a system and method for de-interleaving a data stream stored in a buffer having a plurality of memory locations. Each location has a memory width of (W) bytes and the data stream is formed of a number of data words each including (N) number of data bytes, and (N) is a non-integer multiple of the width (W). The method includes storing the data words into respective memory locations and appending each of the stored data words with number (X) of dummy bytes, a sum of (N)+(X) being an integer multiple of the width (W). The appended dummy bytes are then stored in the respective memory locations.
    Type: Grant
    Filed: January 24, 2003
    Date of Patent: October 5, 2010
    Assignee: Broadcom Corporation
    Inventors: Gregory H. Efland, Jeff Z. Guan, Lin Yin
  • Patent number: 7809395
    Abstract: A method and system for determining synchronization status in a wide band CDMA (WCDMA) network may comprise calculating a signal to noise ratio (SNR) of a downlink dedicated physical channel (DPCH) based on a plurality of transmit power control (TPC) bits received via the downlink dedicated physical channel (DPCH), wherein the value of at least one of the plurality of TPC bits is not known when at least one of the plurality of TPC bits is received. The transmit circuitry may be controlled based on the calculated signal to noise ratio. The transmit circuitry may be disabled if the calculated SNR of the plurality of TPC bits is below a first channel threshold. The transmit circuitry may be enabled if the calculated SNR of the plurality of TPC bits is above a second channel threshold.
    Type: Grant
    Filed: February 15, 2006
    Date of Patent: October 5, 2010
    Assignee: Broadcom Corporation
    Inventors: Severine Catreux-Erceg, Mark Kent, Uri M. Landau, Vinko Erceg
  • Patent number: 7808087
    Abstract: Methods and apparatus for improved thermal performance and electromagnetic interference (EMI) shielding in integrated circuit (IC) packages is described. A die-up or die-down package includes first and second caps defining a cavity, an IC die, and a leadframe. The leadframe includes a centrally located die attach pad, a plurality of leads, and a plurality of tie bars that couple the die attach pad to the leads. The IC die is mounted to the die attach pad. Planar rim portions of the first and second caps that surround the cavity are coupled to the leadframe. The first and second caps and the leadframe form an enclosure structure that substantially encloses the IC die, and shields EMI emanating from and radiating towards the IC die. The enclosure structure also dissipates heat generated by the IC die during operation.
    Type: Grant
    Filed: September 27, 2006
    Date of Patent: October 5, 2010
    Assignee: Broadcom Corporation
    Inventors: Sam Ziqun Zhao, Rezaur Rahman Khan
  • Publication number: 20100246661
    Abstract: In a communication system, Huffman coding techniques are used to obtain shaping gains for an improvement in data transmission rates. More particularly, a novel method of Huffman shaping is described that achieves a shaping gain of greater than 1 dB. The shaping gain results in a higher data rate transmission in a communication system where transmitted power is constrained.
    Type: Application
    Filed: March 31, 2010
    Publication date: September 30, 2010
    Applicant: BROADCOM CORPORATION
    Inventors: Gottfried Ungerboeck, Arthur J. Carlson