Patents Assigned to Broadcom Corporation
  • Patent number: 7908624
    Abstract: A settop box for streaming a television program to a network device through a network includes a central processing unit, a network interface device, a direct memory access engine, a buffer, and a memory for storing computer-executable instructions. The stored instructions cause the direct memory access engine to route time-ordered digital media data packets encoding the television program into the buffer, cause the central processing unit to add a network header to the digital media data packets, and cause the network interface device to relay the digital media data packets to a network device through the network, wherein the packets are relayed substantially without latency and with a time-ordering based on the same time-ordering of the packets in the buffer.
    Type: Grant
    Filed: June 18, 2007
    Date of Patent: March 15, 2011
    Assignee: Broadcom Corporation
    Inventor: Yasantha Nirmal Rajakarunanayake
  • Patent number: 7906835
    Abstract: Methods, systems, and apparatuses for ball grid array land patterns are provided. A ball grid array land pattern includes a plurality of land pads and electrically conductive traces. The plurality of land pads is arranged in an array of rows and columns. A perimeter edge of the array includes a pair of adjacent oblong shaped land pads. An electrically conductive trace is routed between the pair of adjacent oblong shaped land pads from a land pad positioned in an interior of the array to a location external to the array. The oblong shaped land pads are narrower than standard round land pads, and thus provide more clearance for the routing of traces. The oblong shaped land pads enable more land pads of the land pattern array to be routed external to the array on each routing layer, and thus can save printed circuit board component and assembly costs.
    Type: Grant
    Filed: August 13, 2007
    Date of Patent: March 15, 2011
    Assignee: Broadcom Corporation
    Inventor: Robert John Romero
  • Patent number: 7907614
    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: Grant
    Filed: November 10, 2006
    Date of Patent: March 15, 2011
    Assignee: Broadcom Corporation
    Inventors: Matthew J. Fischer, George Kondylis
  • Patent number: 7908495
    Abstract: A system and method for implementing fairness in the powering of computing devices in a power over Ethernet (PoE) application. Power supplies in a power sourcing equipment are often oversubscribed. This oversubscription can lead to starvation of certain computing devices that have power requests that are not granted relative to competing requests. A fairness consideration can be implemented to ensure that starvation conditions are avoided.
    Type: Grant
    Filed: October 11, 2007
    Date of Patent: March 15, 2011
    Assignee: Broadcom Corporation
    Inventors: Wael William Diab, Hemal Vinodchandra Shah, Simon Assouad
  • Patent number: 7907907
    Abstract: RF communications received by a wireless terminal from a servicing base station are used to determine the downlink quality report and implement link adaptation decisions. This involves first implementing an initial transmission scheme between the servicing base station and the wireless terminal. Next, a current downlink quality report corresponding to the initial transmission scheme is generated by the wireless terminal and received at the servicing base station. This downlink quality report is based in whole or in part on a bit-error probability (BEP). The current downlink quality report that corresponds to the initial transmission scheme is then compared to link adaptation thresholds.
    Type: Grant
    Filed: July 27, 2006
    Date of Patent: March 15, 2011
    Assignee: Broadcom Corporation
    Inventor: Xiaoxin Qiu
  • Patent number: 7907626
    Abstract: A method and system for allocating exchange identifications (IDs) in a fibre channel switch for fibre channel aggregation. The method included determining a number (m) of N_ports present in a back end of the switch, and distributing available exchange IDs across the number (m) of present N_ports. Each exchange ID includes (j) bits and (n) bits are used to identify each of the present backend ports, where m?2n.
    Type: Grant
    Filed: August 11, 2005
    Date of Patent: March 15, 2011
    Assignee: Broadcom Corporation
    Inventors: Bhavi Saklecha, Kean P. Hurley, Alfonso Y. Ip
  • Patent number: 7908420
    Abstract: A processing system includes a plurality of first circuit modules and a wired data bus, connected to the plurality of first circuit modules. A plurality of second circuit modules are coupled to an RF data bus via a millimeter wave communication path. A millimeter wave modem receives first data from at least one of the plurality of first circuit modules via the wired data bus, and transmits the first data over the RF data bus to at least one of the plurality of second circuit modules.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: March 15, 2011
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Publication number: 20110057744
    Abstract: A balun that includes a first conductor, a second conductor, and a third conductor. The first conductor has a first length. The first conductor also has a first end connected to a first balanced power amplifier output port. The second conductor has substantially the same first length. The second conductor also includes a first end connected to a second balanced power amplifier output port and a second end connected to a second end of the first conductor. The third conductor has substantially the same first length. The third conductor has a first end connected to an antenna port and a second end connected to a ground potential.
    Type: Application
    Filed: November 12, 2010
    Publication date: March 10, 2011
    Applicant: Broadcom Corporation
    Inventors: Tom McKay, Vas Postoyalko, Edwin Li
  • Publication number: 20110057604
    Abstract: Disclosed is a method for use by a device to distinguish between a Charging Downstream Port (“CDP”) and a Dedicated Charging Port (“DCP”). The method comprises detecting that the device is attached to a charging port, and determining whether the charging port is the CDP or the DCP without causing a host coupled to the CDP to be able to detect the device if the charging port is the CDP.
    Type: Application
    Filed: March 25, 2010
    Publication date: March 10, 2011
    Applicant: BROADCOM CORPORATION
    Inventor: Sebastian Joseph Capella
  • Publication number: 20110058540
    Abstract: A system and method is provided for supporting data transfer protocols that extend beyond standard protocols used in conventional data over cable systems. A subscriber station in accordance with the invention determines, during registration, whether a base station with which it communicates is capable of supporting an extended protocol, and if it is, transfers data to the base station in accordance with the extended protocol. Additionally, a base station in accordance with the invention is notified during registration whether or not a subscriber station supports an extended protocol and stores this information. When a request for transmission opportunity is subsequently received from the subscriber station, the base station accesses the stored information to determine if the cable modem supports the extended protocol.
    Type: Application
    Filed: November 10, 2010
    Publication date: March 10, 2011
    Applicant: Broadcom Corporation
    Inventors: Fred A. Bunn, Thomas L. Johnson
  • Publication number: 20110057731
    Abstract: Embodiments of the present invention enable a feedback-based VCO linearization technique. Embodiments include a frequency locked loop formed by feeding back a VCO's output into the VCO's input in negative phase by means of a frequency-to-voltage (F/V) converter. Embodiments enable constant VCO gain over a wide input tuning range and across PVT variations. Further, embodiments can be nested within a PLL, for example, with negligible area and power consumption overhead.
    Type: Application
    Filed: September 10, 2009
    Publication date: March 10, 2011
    Applicant: Broadcom Corporation
    Inventors: Michael YOUSSEF, Ahmad Mirzaei, Hooman Darabi
  • Publication number: 20110057271
    Abstract: Optimization of the implantation structure of a metal oxide silicon field effect transistor (MOSFET) device fabricated using conventional complementary metal oxide silicon (CMOS) logic foundry technology to increase the breakdown voltage. The techniques used to optimize the implantation structure involve lightly implanting the gate region, displacing the drain region from the gate region, and implanting P-well and N-well regions adjacent to one another without an isolation region in between.
    Type: Application
    Filed: November 10, 2010
    Publication date: March 10, 2011
    Applicant: Broadcom Corporation
    Inventors: Akira ITO, Henry Kuo-Shun CHEN
  • Publication number: 20110058054
    Abstract: A radio transmitter integrated circuit includes a photodiode array circuit, a digital conversion module, and a transmit baseband processing module. The photodiode array circuit converts received light into electrical image signals. The digital conversion module converts the electrical image signals into digital image signals. The transmit baseband processing module converts the digital image signals into digital transmit baseband or low IF signals.
    Type: Application
    Filed: November 15, 2010
    Publication date: March 10, 2011
    Applicant: BROADCOM CORPORATION
    Inventor: Ahmadreza (Reza) Rofougaran
  • Publication number: 20110058813
    Abstract: Embodiments of the present invention exploit the existing capabilities of the Ethernet Passive Optical Network (EPON) MAC layer, designed for fiber optics communications, to provide a low cost MAC layer with upper layer connectivity over a hybrid fiber coaxial (HFC) network. In particular, embodiments allow for the EPON MAC to be used end-to-end (i.e., from an optical line terminal (OLT) to a coaxial network unit (CNU)) in a HFC network, thereby fully leveraging the packet processing capabilities, QoS functions, and management features of the EPON MAC. Furthermore, embodiments enable unified provisioning and management for both fiber and coaxial network units in a HFC network.
    Type: Application
    Filed: September 9, 2010
    Publication date: March 10, 2011
    Applicant: Broadcom Corporation
    Inventors: Edward Wayne BOYD, Sanjay Goswami
  • Publication number: 20110058477
    Abstract: Apparatus and methods for intelligent congestion feedback are disclosed. An example apparatus includes a data interface configured to receive data packets from a source endpoint via an intermediate node. The data packets include a field indicating whether data congestion for data being sent to the destination endpoint is occurring. The example apparatus also includes a timer. The example apparatus further includes a feedback loop interface configured to selectively enable a feedback loop to the source endpoint and to transmit congestion notification (CN) messages to the source endpoint over the feedback loop. Upon receiving a data packet indicating that congestion has occurred due to the data packets from the source endpoint to the destination endpoint, the destination endpoint is configured to set the timer to a preset time value; start the timer reverse counting from the preset time value to zero, enable the feedback loop and transmit the CN messages.
    Type: Application
    Filed: November 12, 2010
    Publication date: March 10, 2011
    Applicant: BROADCOM CORPORATION
    Inventors: Bruce Kwan, Puneet Agarwal
  • Patent number: 7904042
    Abstract: Fast image rejection. Dual down conversion processing of a received signal by performing both low side injection and high side injection thereby generating a first down converted signal and a second down converted signal. Analysis of one or both of the first and second down converted signals, including the signal and image components thereof, is performed to determine which of the first down converted signal and the second down converted signal is appropriate to be selected for subsequent baseband processing. For example, if a signal strength of an image within the first down converted signal is less than a signal strength of a signal component within the first down converted signal, then the first down converted signal is most likely the appropriate signal to undergo baseband processing. Alternatively, if the converse is true, then the second down converted signal may be the appropriate signal to undergo baseband processing.
    Type: Grant
    Filed: February 8, 2008
    Date of Patent: March 8, 2011
    Assignee: Broadcom Corporation
    Inventor: Hooman Darabi
  • Patent number: 7903810
    Abstract: A method and apparatus are disclosed for efficiently scrambling one or more bytes of data according to DSL standards on a processor. This is achieved by providing an instruction for scrambling one or more bytes of data according to the DSL standards. Accordingly, the invention advantageously provides a processor with the ability to scramble data with a single instruction thus allowing for more efficient and faster scrambling operations for subsequent modulation and transmission.
    Type: Grant
    Filed: September 22, 2004
    Date of Patent: March 8, 2011
    Assignee: Broadcom Corporation
    Inventors: Mark Taunton, Timothy Martin Dobson
  • Patent number: 7903772
    Abstract: A demodulator for use in a receiver converts a digital baseband signal into inbound digital symbols with reduced hardware complexity and reduced power consumption. The demodulator includes a lowpass filter operably coupled to filter the digital baseband signal to produce a filtered digital baseband signal, and an equalizer operating at a first sampling rate to equalize the frequency response of the digital baseband signal such that the receiver overall in-band frequency response approximates the frequency response of a square root raised cosine filter to produce an adjusted digital baseband signal. An interpolator receives the adjusted digital baseband signal at the first sampling rate and interpolates the adjusted digital baseband signal to produce an interpolated digital baseband signal at a second sampling rate, from which the inbound digital symbols can be generated.
    Type: Grant
    Filed: February 4, 2005
    Date of Patent: March 8, 2011
    Assignee: Broadcom Corporation
    Inventor: Henrik T. Jensen
  • Patent number: 7903124
    Abstract: A method, system, and a computer program product for filtering palettized image formats are presented. In an embodiment, data is retrieved from a palette of an image. Data associated with a channel of the palette is filtered, and stored, for example, together with a pixel buffer of the image to form a filtered image. Additionally, a method, system, and a computer program product for displaying images stored in a modified palettized image format are presented. In an embodiment, data is retrieved from a palette and from a pixel buffer of an image stored in modified palettized image format. Filtered pixels of the image are formed by combining, for each pixel in the pixel buffer, data retrieved from the palette with filtered data, retrieved from the pixel buffer. The modified palettized image is rendered on a display by displaying the filtered pixels.
    Type: Grant
    Filed: January 19, 2006
    Date of Patent: March 8, 2011
    Assignee: Broadcom Corporation
    Inventors: Jason W. Herrick, Darren D. Neuman, Glenn Nissen
  • Patent number: 7904584
    Abstract: A method of handling frames in a network device is disclosed. The steps include receiving a frame by a network device of an assembly of network devices, with the assembly of devices divided into a first side and a second side and the network device being on the first side, examining the received frame to determine whether the frame is destined for a member of a specific trunking group, determining whether a destination device identifier for the frame corresponds to one of the network devices on the second side and forwarding the frame to a destination port based on the specific trunk group membership and the destination device identifier.
    Type: Grant
    Filed: February 12, 2004
    Date of Patent: March 8, 2011
    Assignee: Broadcom Corporation
    Inventor: Shrjie Tzeng