Patents Assigned to Broadcom
  • Publication number: 20120224582
    Abstract: An Ethernet network comprising multi-rate link partners that may be operable to communicate symmetrically and/or asymmetrically via any of a plurality of channels. The multi-rate link partners may monitor one or more factors that may affect their power consumption and/or energy efficiency. During operation, an uplink and/or downlink communication rate may be configured, based on the monitoring, to enable asymmetrical data rate operation. The monitored factors may comprise prior or current data rates, bit error rate, packet error rate, latency, queued data and/or tasks, for example. The multi-rate link partners may comprise a twisted pair PHY, an optical PHY or a backplane PHY. In order to reduce power consumption and/or improve energy efficiency, one or more of the uplink communication rate and/or the downlink communication rate may be lowered. The power consumption may be reduced for a multi-rate PHY, a host computer and/or a MAC controller.
    Type: Application
    Filed: May 15, 2012
    Publication date: September 6, 2012
    Applicant: BROADCOM CORPORATION
    Inventors: Wael William Diab, Kevin Brown
  • Publication number: 20120223857
    Abstract: A GNSS enabled mobile device transmits to a location server a combination of GNSS-based location data and non-GNSS based location data used to determining reference positions at the location server. The GNSS mobile device receives the determined reference positions from the location server to calculate an associated GNSS position fix. The transmitted GNSS-based location data comprises GNSS position fixes associated with the GNSS enabled mobile device. The transmitted non-GNSS-based location data comprises a serving Cell-ID, neighbor Cell-IDs, neighbor cell fingerprinting, timing advance parameters, and/or a mobile country code. Reference positions associated with the serving Cell-ID are determined and/or refined based on location information acquired from each of associated mobile devices.
    Type: Application
    Filed: December 6, 2011
    Publication date: September 6, 2012
    Applicant: BROADCOM CORPORATION
    Inventors: Steven Malkos, Andrei Kosolobov, David Albert Lundgren, Manuel del Castillo, Christopher Lane, Alexander Michael Usach
  • Publication number: 20120224527
    Abstract: A method and apparatus is disclosed to restrict the delivery of video, audio, and/or data to unauthorized end users in a satellite communications system. The satellite communications system includes one or more satellite receiving antennas, commonly referred to as a satellite dish, to receive downlink communications signals from one or more satellites. The transmission received by the one or more satellite receiving antennas is converted by an outdoor unit (ODU) for transmission to one or more indoor units (IDUs). The ODU receives control information from one or more satellites from the downlink communications signals, commonly referred to as in-band, and/or from out-of-band communications signals. The ODU may use the control information to restrict access to one or more communications channels embedded within the downlink communications signals to the unauthorized end users.
    Type: Application
    Filed: June 22, 2011
    Publication date: September 6, 2012
    Applicant: BROADCOM CORPORATION
    Inventors: Stephen Edward KRAFFT, Leonard Dauphinee, Ramon Alejandro Gomez
  • Publication number: 20120224689
    Abstract: A Set Top Box (STB) or client computer includes a communication interface operable to receive digital messages and digital content, memory, a transcoder, a central processing unit, and security processing circuitry. The security processor (or other components of the STB) is operable to identify protected digital content of the digital content that is to be isolated from the central processing unit during transcoding and to isolate the protected digital content from the central processing unit during the transcoding. The CPU may be denied access to a protected portion of the memory during the transcoding in which the transcoder stores non-scrambled protected digital content. The protected portion of the memory may be buffer memory accessible by the transcoder and not accessible by the central processing unit. The protected digital content may be identified from the digital message.
    Type: Application
    Filed: March 29, 2011
    Publication date: September 6, 2012
    Applicant: BROADCOM CORPORATION
    Inventor: Steve (Stephane) Rodgers
  • Patent number: 8260216
    Abstract: An apparatus includes an RFID transceiver, a processing module, and a wireless communication module. The RFID transceiver receives an RFID signal from a device and obtains communication information from the RFID signal. The processing module is operable to: determine a wireless communication protocol and device identification information from the communication information; receive an outbound data request; and generate outbound data in accordance with the outbound data request, wherein the outbound data includes at least a portion of the identification information. The wireless communication module converts outbound data into an outbound wireless signal in accordance with the wireless communication protocol.
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: September 4, 2012
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • 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
  • Patent number: 8259628
    Abstract: Certain embodiments of a method and system for handling connection setup in a network may comprise a network interface hardware device (NIHW) that may be operable to receive a services list and/or connection acceptance criteria from a first guest operating system running on a host system, receive a connection request from a second guest operating system running on the host system, and determine whether to allow establishment of the requested connection based on one or both of the services list and the connection acceptance criteria. The determination may be made prior to or during connection set up. The NIHW may maintain a connection state comprising information regarding set up of the requested connection. The services list may comprise one or more of a local network address, a local transport address, a network protocol, and a transport protocol. The communicated acceptance criteria may comprise packet filtering operations and/or security operations.
    Type: Grant
    Filed: September 6, 2011
    Date of Patent: September 4, 2012
    Assignee: Broadcom Corporation
    Inventor: Uri El Zur
  • Patent number: 8260212
    Abstract: An RF receiver and an RF transmitter, which are integrated in a single substrate, are operable to share a single reconfigurable filter to perform RF receiver filtering and RF transmitter filtering. The reconfigurable filter is configured to operate as a bandpass filter such as an image rejection bandpass filter for receiving RF signals by the RF receiver. The reconfigurable filter operates as a low pass filter for transmitting RF signals by the RF transmitter. The reconfigurable filter is configured to operate in a RF receiver filtering mode or a RF transmitter filtering mode, respectively. The reconfigurable filter is enabled to share configurable circuit components of the radio transceiver in both the radio frequency receiver filtering mode and the radio frequency transmitter filtering mode. The reconfigurable filter transitions between the radio frequency receiver filtering mode and the radio frequency transmitter filtering mode via reconfiguring the shared configurable circuit components.
    Type: Grant
    Filed: May 19, 2009
    Date of Patent: September 4, 2012
    Assignee: Broadcom Corporation
    Inventor: Hung-Ming Chien
  • Patent number: 8260970
    Abstract: A communication device includes an RF transceiver for communicating first data with a first remote communication device via a first protocol and a first frequency band in a first mode of operation, wherein the first data is communicated via indirect wireless communication. A millimeter wave transceiver communicates second data with a second remote communication device via a second protocol and a 60 GHz frequency band in a second mode of operation. A communication control module coordinates the communication of the first data and the second data with the at least one of the plurality of remote communication devices. A graphical interface device selects the first remote communication device and the second remote communication device and selects at least one of the first mode of operation and the second mode of operation, based on actions of a user.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: September 4, 2012
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • 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
  • 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
  • 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
  • Patent number: 8259761
    Abstract: Aspects of a method and system for managing multimedia traffic over Ethernet are provided. In this regard, multimedia traffic comprising one or more Ethernet frames may be identified via one or more headers comprising the frames and processed according to the identification. In this regard, general Ethernet traffic may be multiplexed into egress frames based on the identification. Similarly, ingress Ethernet frames may be demultiplexed into multimedia traffic and general traffic based on the identification. Headers utilized to identify and/or route multimedia traffic and general traffic may comprise Ethertype and/or subtype fields. Headers utilized to identify and/or route multimedia traffic and general traffic may comprise a connection identifier field. Similarly, Headers utilized to identify and/or route multimedia traffic and general traffic may comprise a data type field.
    Type: Grant
    Filed: October 24, 2007
    Date of Patent: September 4, 2012
    Assignee: Broadcom Corporation
    Inventors: Wael William Diab, Yongbum Kim, Howard Frazier
  • 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
  • Patent number: 8259762
    Abstract: Provided is a high speed bit stream data conversion circuit that includes input ports to receive first bit streams at a first bit rate. Data conversion circuits receive the first bit streams and produce second bit stream(s), wherein the number and bit rate of the first and second bit stream(s) differ. Symmetrical pathways transport the first bit streams from the input ports to the data conversion circuits, wherein their transmission time(s) are substantially equal. A clock distribution circuit receives and symmetrically distributes a clock signal to data conversion circuits. A central trunk coupled to the clock port and located between a first pair of circuit pathways with paired branches that extend from the trunk and that couple to the data conversion circuits make up the clock distribution circuit. The distributed data clock signal latches data in data conversion circuits from the first to the second bit stream(s).
    Type: Grant
    Filed: August 16, 2010
    Date of Patent: September 4, 2012
    Assignee: Broadcom Corporation
    Inventors: Guangming Yin, Bo Zhang, Mohammad Nejad, Jun Cao
  • Patent number: 8260220
    Abstract: A communication device includes memory, an input interface, a processing module, and a transmitter. The processing module receives a digital signal from the input interface, wherein the digital signal includes a desired digital signal component and an undesired digital signal component. The processing module identifies one of a plurality of codebooks based on the undesired digital signal component. The processing module then identifies a codebook entry from the one of the plurality of codebooks based on the desired digital signal component to produce a selected codebook entry. The processing module then generates a coded signal based on the selected codebook entry, wherein the coded signal includes a substantially unattenuated representation of the desired digital signal component and an attenuated representation of the undesired digital signal component. The transmitter converts the coded signal into an outbound signal in accordance with a signaling protocol and transmits it.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: September 4, 2012
    Assignee: Broadcom Corporation
    Inventor: Nambirajan Seshadri
  • Patent number: 8259716
    Abstract: In an Ethernet network comprising link partners coupled via an Ethernet link, an energy efficient Ethernet network communication control policy may specify a power level mode. Power level control data may be communicated between a PHY and a MAC via an MII, MDIO or a bus that is not specified by 802.3. A device above a MAC layer device may comprise hardware, software and/or firmware that may communicate the control policy to the PHY layer device and/or MAC layer device. Control data may be inserted within an inter-packet gap, a data packet preamble and/or a Q ordered set and/or may be sent via an out-of-band signal. A response to the control data may be sent via an in band path and/or out of band path. Link partners may enter and/or exit a power mode, for example, a low power idle and/or a sub-rate mode based on the communicated control data.
    Type: Grant
    Filed: May 26, 2009
    Date of Patent: September 4, 2012
    Assignee: Broadcom Corporation
    Inventor: Wael William Diab
  • 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
  • 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
  • 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