Patents Examined by Christopher P. Grey
  • Patent number: 7724661
    Abstract: An ATM network traffic shaper is implemented in hardware. The traffic shaper shapes transmit data on one or more virtual circuits (VCs) according to the specified quality of service (QoS) parameters. Thus, the traffic shaper provides for the delivery of associated data cells in accordance with the specified QoS parameters. The traffic shaper is scalable in that the number of supported VCs can be increased with a relatively small increase in the size of the device and associated logic gates. The traffic shaper supports constant bit rate (CBR), variable bit rate (VBR), and unknown bit rate (UBR) service types and generates cell transmit requests with zero cell delay variation (CDVT). The traffic shaper also provides very high resolution in terms of bit rate specification. Varying shaping resolutions are achieved by varying a shaping interval time (SIT) generated by a SIT counter.
    Type: Grant
    Filed: January 10, 2008
    Date of Patent: May 25, 2010
    Assignee: Broadcom Corporation
    Inventor: Daniel J. Burns
  • Patent number: 7706260
    Abstract: Dynamic rate limiting of background traffic to alleviate congestion in the access network is enabled. ICMP echo round-trip times and ICMP losses to a nearby node outside the local area and just beyond the divergence in end-to-end paths are measured, allowing unambiguous discrimination of nearby from distant congestion points. Using round-trip time samples, either short-run delay or short-run variance in delay can be measured to estimate congestion. When combined with an appropriate control law, background traffic can be rapidly reduced to allow interactive traffic to traverse unhindered through the access network. The described system and methods can be implemented in the application-layer and without any additional support from the network.
    Type: Grant
    Filed: April 26, 2007
    Date of Patent: April 27, 2010
    Assignee: BitTorrent, Inc.
    Inventors: Bram Cohen, David Harrison, Gregory Hazel
  • Patent number: 7701954
    Abstract: In one aspect of the present invention, a network gateway is configured to facilitate on line and off line bi-directional communication between a number of near end data and telephony devices with far end data termination devices via a hybrid fiber coaxial network and a cable modem termination system. The described network gateway combines a QAM receiver, a transmitter, a DOCSIS MAC, a CPU, a voice and audio processor, an Ethernet MAC, and a USB controller to provide high performance and robust operation.
    Type: Grant
    Filed: May 12, 2004
    Date of Patent: April 20, 2010
    Assignee: Broadcom Corporation
    Inventors: Theodore F. Rabenko, David Hartman, James C. H. Thi
  • Patent number: 7697466
    Abstract: At a base station apparatus, known pilot signals for use in channel estimation are transmitted, and in addition thereto MCS pilot signals that are used to perform adaptive modulations respectively corresponding to a plurality of modulation schemes are multiplexed and output. A mobile station apparatus dispreads the respective MCS signals out of the multiplex signal, compares these to known symbols patterns, and sends the MCS pilot signals that show a matching relationship to the base station apparatus as a mobile station reception result. Upon receiving the mobile station reception result from the mobile station apparatus, the base station apparatus selects the modulation scheme of the optimum modulation level for the downlink signals. This configuration makes it possible to switch the modulation schemes in an accurate and simple way.
    Type: Grant
    Filed: July 15, 2002
    Date of Patent: April 13, 2010
    Assignee: Panasonic Corporation
    Inventors: Kazunari Hashimoto, Sadaki Futagi, Kenichi Miyoshi
  • Patent number: 7697547
    Abstract: Data representing video content is distributed over a passive optical network (PON) on virtual channels that are assigned to television (TV) channels as subscribers request the TV channels and de-assigned from TV channels when subscribers are no longer viewing them. Associating and de-associating TV channels with virtual channels can be performed with very low latency by using a near-physical layer protocol, such as the Physical Layer Operation Administration and Maintenance (PLOAM) protocol.
    Type: Grant
    Filed: December 7, 2005
    Date of Patent: April 13, 2010
    Assignee: Alcatel Lucent
    Inventors: Leopold Diouf, Tom Van Caenegem
  • Patent number: 7693034
    Abstract: A circuit for converting frequency domain information to time domain information includes an Inverse Fast Fourier Transform circuit having a length of N coefficients. The Inverse Fast Fourier Transform circuit is adapted to receive input data of length N coefficients and generate output data of length N coefficients that are circularly shifted by m coefficients. The circuit also includes Cyclical Prefix Insertion circuit adapted to insert a cyclical prefix of length m. The Cyclical Prefix Insertion circuit includes a first switch, connected to the Inverse Fast Fourier Transform circuit, a buffer, having an input connected to the first switch and an output, the buffer having a length m, and a second switch, coupled to the first switch and to the buffer. The first and second switches selectively couple the output of the buffer and the Inverse Fast Fourier Transform circuit to an output of the second switch. The buffer is reduced to length m.
    Type: Grant
    Filed: August 27, 2003
    Date of Patent: April 6, 2010
    Assignee: Sasken Communication Technologies Ltd.
    Inventors: Balvinder Singh, Suyog Moogi
  • Patent number: 7675848
    Abstract: A technique treats a protected forwarding adjacency (FA) as a dynamic entity in that it allows a backup tunnel associated with the FA to carry traffic for the FA, when it's primary tunnel has failed, up to a predetermined amount of time. If after the predetermined amount of time has elapsed and the FA has not recovered (e.g., the primary tunnel has not been reestablished), a network topology change is automatically triggered causing the network to converge on a new network topology. By triggering the network topology change, a path that is more optimal than the path associated with the backup tunnel may be subsequently determined to carry the traffic.
    Type: Grant
    Filed: July 15, 2004
    Date of Patent: March 9, 2010
    Assignee: Cisco Technology, Inc.
    Inventors: Jean-Philippe Vasseur, Stefano B. Previdi, David D. Ward, Robert Goguen
  • Patent number: 7672330
    Abstract: The present invention provides a method for sending and receiving the network management messages and/or the control messages, that is, using GFP protocol in stead of conventional LAPD protocol, predetermining the mapping relationship between the values of UPI field in GFP protocol and the types of the data including the network management messages and/or the control messages, furthermore, filling the UPI field of GFP protocol based on the corresponding mapping relationship, encapsulating the network management messages and/or the control messages via GFP protocol into SDH/SONET, PDH or OTN, and transmitting the encapsulated data. GFP protocol is a universal protocol, allowing for inter-operation of the network management messages and the control messages between the equipments of different manufacturers.
    Type: Grant
    Filed: December 7, 2005
    Date of Patent: March 2, 2010
    Assignee: Alcatel
    Inventor: Feng Huang
  • Patent number: 7646767
    Abstract: A method and system for routing fiber channel frames using a fiber channel switch element is provided. The switch element includes, a hashing module whose output is used to select the column from a look up table to route frames. The method includes, indexing a look up table using domain, area, virtual storage area network identifier, a hashing module output and/or AL_PA values; selecting a column from the look up table based on a column select signal; and routing a frame if a route is valid. The hashing module takes a fiber channel header to generate a pseudo random value used for selecting a column from the look up table. The hashing module uses same field values in an exchange to generate the pseudo random value. A hash function is used on a frame's OX_ID, D_ID, S_ID, and/or RX_ID to route fiber channel frames.
    Type: Grant
    Filed: July 20, 2004
    Date of Patent: January 12, 2010
    Assignee: QLOGIC, Corporation
    Inventors: Frank R Dropps, Edward C McGlaughlin, Steven M Betker
  • Patent number: 7643471
    Abstract: A mobile communication method for performing communications between an originating terminal and a terminating terminal through a radio access network and a core network, includes: sending a bearer setup request, in the originating terminal, to a first session control device controlling a location area of the originating terminal, the bearer setup request requesting to set a bearer for the communications between the originating terminal and the terminating terminal; and performing a process of sending a communication start request for the terminating terminal in response to the bearer setup request in parallel with a process of commanding a bearer setup device to set the bearer, in the first session control device.
    Type: Grant
    Filed: October 4, 2005
    Date of Patent: January 5, 2010
    Assignee: NTT DoCoMo, Inc.
    Inventors: Akimichi Tanabe, Hiroaki Amada, Motoshi Tamura, Masahiro Sawada
  • Patent number: 7633896
    Abstract: An optimized gateway selection process of the present invention is based on a universal mobility manager (UMM), a component for inter-technology location management. The UMM is capable of holding location information for diverse cellular networks, as well as for Internet telephony systems. For cellular networks, UMM acts as a traditional HLR; for an Internet telephony network, it acts as the entities that are responsible for user/terminal registration (registrar in SIP, gatekeeper in H.323) and address resolution (proxy server in SIP, gatekeeper in H.323). An optimal gateway selection is possible based on location related information provided by the UMM which had not previously been available. Utilizing the newly available information enables a gateway to be selected which may, for example, enable the circuit switched portion of a call to now be minimized.
    Type: Grant
    Filed: January 23, 2002
    Date of Patent: December 15, 2009
    Assignee: Alcatel-Lucent USA Inc.
    Inventors: Parag M. Doshi, Oliver Haase, Jonathan Michael Lennox, Kazutaka Murakami, Ming Xiong
  • Patent number: 7627003
    Abstract: A clock synchronization buffer for a counter clock flow pipelined circuit including a cascade of processing modules that receive data from a previous module and provide output results to a following module. The clock synchronization buffer receives a clock input signal and provides clock signals to a local processing module and to the next pipeline stage. The clock synchronization buffer includes a selectable delay stage that receives a clock input signal and a delay select signal and outputs a clock signal having a selected delay. An amplifier connected to the selectable delay stage provides the delayed clock signal to a local processing module that corresponds to the clock synchronization buffer circuit. An inverting amplifier connected to the selectable delay stage provides the delayed clock signal to the next pipeline stage. A clock synchronization controller synchronizes the phases of reference clock input and synchronized clock input signals.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: December 1, 2009
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Douglas Jai Fouts, Brian Lee Luke
  • Patent number: 7626937
    Abstract: The present invention provides a system and method that operates in the link layer and detects connection status in a LAN. The system includes a request frame whose source address is an address of a node transmitting the request frame, a reply frame whose destination address is the source address of the request frame, and a first node and a second node within the LAN for processing the request/reply frame. The method includes the first node transmitting a request frame into the LAN, the second node transmitting a reply frame to the first node if receiving the request frame, and the first node checking whether a destination address of the reply frame comprises an address of the first node when receiving the reply frame. If so, the connection between the first and second nodes is in a normal state.
    Type: Grant
    Filed: July 31, 2003
    Date of Patent: December 1, 2009
    Assignee: Realtek Semiconductor Corp.
    Inventors: Jin-Ru Chen, Chun-Feng Liu
  • Patent number: 7626947
    Abstract: A telecommunications system. The system includes a first node. The system includes a second node. The system preferably includes at least one intermediate node in communication with the first node and the second node. The first node, second node and intermediate node defining a path. The first node repeatedly sending signaling through the intermediate node to the second node and receiving the signaling back to establish and maintain a connection between the first node, second node and intermediate node. The system includes means for dynamically placing connection points along the path through which the connection is established each time after signaling from the first node to the second node returns to the first node. A method for forming connections in a telecommunications system.
    Type: Grant
    Filed: August 27, 2003
    Date of Patent: December 1, 2009
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Chris Bender, Ramprasad Santhanakrishnan
  • Patent number: 7623481
    Abstract: A hyper throughput packet transmission method for a wireless local area network operating in burst and protection mode is provided. A first CTS frame is sent, comprising an NAV to reserve the medium for a duration. Upon completion of the first CTS frame delivery, a plurality of data frames are delivered to the destination. Upon completion of the data frame delivery, a second CTS frame is sent to reserve the medium for another duration, such that the previous steps form a loop. Delivery of the data frames comprises, a data frame is delivered from the source to the destination, and after the data frame delivered, waiting for an ACK frame from the destination within one SIFS interval. Upon receipt of the ACK frame, if the following data frame is ready, the previous steps loop, otherwise the delivery is complete.
    Type: Grant
    Filed: October 4, 2005
    Date of Patent: November 24, 2009
    Assignee: Via Technologies, Inc.
    Inventor: Sheng-Chung Chen
  • Patent number: 7596105
    Abstract: A time division duplex (TDD) user equipment (UE) is configured to synchronize to a TDD base station. The UE includes a receiver configured to receive a primary synchronization code along with a plurality of secondary synchronization codes from a TDD base station. The TDD base station is associated with having a code group out of N code groups. The plurality of secondary synchronization codes number less than (log2N)+1 and are quadrature phase shift keying modulated. The UE also includes a corresponding matched filter to each of the received secondary synchronization codes. The UE is configured to identify the code group of the TDD base station by the received plurality of secondary synchronization.
    Type: Grant
    Filed: August 17, 2006
    Date of Patent: September 29, 2009
    Assignee: InterDigital Technology Corporation
    Inventors: Nadir Sezgin, Faith Ozluturk
  • Patent number: 7590072
    Abstract: In a communication network, the network management system NMS keeps one or more element management system EMS in synchronization of network topology changes using requests that are automatically generated or manually requested and then sent from the NMS to the affected EMS(s) whenever a node topology change is made at the NMS. Examples of changes are node creation, node move, node group move, node group renaming, etc. As the changes are completed in the EMS topology database, the EMS sends acknowledgments of the request to the NMS. This functionality requires verification of the validity of the request for that specific EMS, before the change is implemented at the NMS.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: September 15, 2009
    Assignee: Alcatel Lucent
    Inventors: Tarek Radi, Chadie Ghadie
  • Patent number: 7570646
    Abstract: A slave interface unit controls the exchange of data between a master processing unit and a plurality of slave processing units operating in the asynchronous transfer mode (ATM) of operation. The ATM slave interface unit has a receive unit and a transmit unit that exchange data cells and control signals with the ATM master processing unit. The receive unit and the transmit unit are coupled to a receive buffer storage unit and a transmit buffer storage unit, respectively. The receive buffer storage unit and the transmit buffer storage unit exchange data and control signals with the direct memory access unit. The ATM slave interface unit includes a configuration interface unit having a register that identifies the location in the data cell where the destination address is located and relates the destination address to the particular processing unit or memory location. The receive buffer unit uses the information in the register to determine the destination of the data cell.
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: August 4, 2009
    Assignee: Texas Instruments Incorporated
    Inventors: Martin Li, Jay B. Reimer, Shakuntala Anjanaiah, Natarajan Seshan, Patrick J. Smith
  • Patent number: 7545807
    Abstract: A method for formatting a signal in a mobile communication system by appending a plurality of medium access control headers to a plurality of medium access control-service data units for data transfer between a mobile station and network in the mobile communication system. If the service data units have the same characteristics, a medium access control-protocol data unit is formed by successively coupling the service data units to any one of the medium access control headers. If the service data units have different characteristics, the protocol data unit is formed by sequentially coupling each of the service data units and each of the medium access control headers. The formed protocol data unit is then transformed into a transport block with a predetermined size.
    Type: Grant
    Filed: August 10, 2004
    Date of Patent: June 9, 2009
    Assignee: LG Electronics, Inc.
    Inventors: In Tae Hwang, Sang Rim Shin, Myoung Jin Ok
  • Patent number: 7542409
    Abstract: A method for processing signals received in a communications system determines symbol information corresponding to a re-transmitted packet, compared the symbol information of the re-transmitted packet with symbol information of an original packet, and formed a combined packet based on a result of the comparing step.
    Type: Grant
    Filed: March 27, 2003
    Date of Patent: June 2, 2009
    Assignee: LG Electronics Inc.
    Inventor: Jik-Dong Kim