Patents Issued in July 24, 2007
  • Patent number: 7248529
    Abstract: A semiconductor device has: a fuse having one end applied with a first voltage, and a MOS transistor having source, gate and drain and a connection point between the other end of the fuse and one of the source and drain, a second voltage lower than the first voltage applied to the other of the source and drain, wherein: the first and second voltages, characteristics of the MOS transistor and a resistance of the fuse are selected so that the fuse can be broken down when a predetermined program voltage is applied to the gate; and the resistance of the fuse is set to such a value as a voltage difference between a voltage at the connection point and the second voltage is lower than a drain voltage of the MOS transistor at which a drain current starts saturating, when the program voltage is applied to the gate.
    Type: Grant
    Filed: September 8, 2004
    Date of Patent: July 24, 2007
    Assignee: Yamaha Corporation
    Inventors: Takayuki Kamiya, Masayoshi Omura
  • Patent number: 7248530
    Abstract: An integrated semiconductor memory device includes external terminals to which an input signal can be applied to each external terminal, and a register circuit with registers. Each register stores a respective input signal. A programming circuit is also provided with programmable switching units configured such that, in a manner dependent on a respective programming state of the programmable switching units, each respective external terminal can be connected to a respective register of the register circuit. The programming circuit can be programmed by applying unit vectors of programming signals alternately to the external terminals. In this case, the programming signal having a first state is applied in each case to one of the external terminals and the programming signal having a second state is applied to the rest of the external terminals. The integrated semiconductor memory makes it possible for an unknown line scrambling to be resolved internally.
    Type: Grant
    Filed: October 31, 2005
    Date of Patent: July 24, 2007
    Assignee: Infineon Technologies, AG
    Inventor: Martin Perner
  • Patent number: 7248531
    Abstract: A voltage down converter (VDC) applicable to high-speed memory devices. The VDC includes a steady driver and active driver along with at least one additional transistor. The steady driver and active driver are coupled by a transistor switch during device start-up to provide fast ramp-up to operating voltage and current. After start-up, the steady driver and active drive function to maintain a steady operating voltage and current. An additional transistor is digitally controlled to drive up operating voltage and current upon issuance of an active command representing read, write, and/or refresh of memory. In this manner, the additional transistor provides fast compensation for fluctuations in operating voltage and current brought on by activity in the memory array.
    Type: Grant
    Filed: August 3, 2005
    Date of Patent: July 24, 2007
    Assignee: Mosaid Technologies Incorporated
    Inventors: Hong Beom Pyeon, Bruce Millar
  • Patent number: 7248532
    Abstract: A memory device responsive to standby mode commands for reducing internal operational power on a memory device is disclosed. The memory device includes a circuit for reducing power during a standby mode with the circuit including a reference with at least first and second reference signals. The circuit also includes a switching device for switching between the first and second reference signals in response to the standby mode command and further controls an internal operational power regulator to adjust between normal and low-power outputs for further reducing the power to portions of the memory device.
    Type: Grant
    Filed: February 14, 2005
    Date of Patent: July 24, 2007
    Assignee: Micron Technology, Inc.
    Inventor: Aaron M. Schoenfeld
  • Patent number: 7248533
    Abstract: A semiconductor circuit apparatus comprises a substrate and a circuit block including a memory formed on the substrate. The circuit block performs regular operations at a first power supply voltage in an active mode, and a part of the circuit block is stopped and the memory keeps stored data at a second power supply voltage smaller than the first power supply voltage in a power save mode. The memory holds the stored data during the power save mode, resulting in higher speed return to a regular active mode, as well as power consumption reduction.
    Type: Grant
    Filed: March 25, 2005
    Date of Patent: July 24, 2007
    Assignee: NEC Electronics Corporation
    Inventor: Yoshiharu Aimoto
  • Patent number: 7248534
    Abstract: A semiconductor memory device that speeds up its operation. A multiplexer puts one of word lines into an active state to select one memory cell in each local block. Another multiplexer puts one of local block selection signals into an active state and puts one of p-channel transistors into the ON state to select one of local blocks arranged in a column direction. A NAND element inverts the logical product of a signal output from a local block selected by a local block selection signal and a signal output from a block not selected and outputs a result obtained to put an n-channel transistor into the ON or OFF state. The n-channel transistor grounds a common bit line when it goes into the ON state. Each of the p-channel transistors is selected by a column switch (not shown) and send read data to a data bus.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: July 24, 2007
    Assignee: Fujitsu Limited
    Inventors: Hiroshi Shimizu, Wataru Yokozeki
  • Patent number: 7248535
    Abstract: Semiconductor memory devices having a negatively biased sub-word line scheme and methods of driving the same are disclosed. In a semiconductor memory device, NMOS transistors for pulling down a word line enable signal and a word line driving signal to a negative voltage are adjusted to a negative voltage. The negatively biased word line scheme may decrease influx of discharge current into the negative voltage source and decrease negative voltage fluctuations and associated noise.
    Type: Grant
    Filed: January 31, 2006
    Date of Patent: July 24, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Ki-Chul Chun
  • Patent number: 7248536
    Abstract: A semiconductor memory and a method for operating the latter in order are provided, at least in testwise fashion, to deactivate a word line segment (12) of a segmented word line not via a first line (21) otherwise used for deactivation, but rather via a second line (22) via that the word line segment (12) is otherwise activated. The second line (22) can optionally be biased with a second potential (Vpp) provided for activation or with a third potential (Vgnd). If the third potential (Vgnd) is used for at least temporarily deactivating the word line segment (12), the word line segment can be driven via a switching element (17), which couples the word line segment to the second line (22), without the complementary switching element (16) of the driver segment (20) having to be used for deactivation.
    Type: Grant
    Filed: October 6, 2005
    Date of Patent: July 24, 2007
    Assignee: Infineon Technologies AG
    Inventors: Stephan Schroeder, Arndt Gruber, Manfred Proell, Herbert Benzinger
  • Patent number: 7248538
    Abstract: A semiconductor memory device includes an interface unit connected to an external circuit, a data memory unit including a write data line, a read-out data line, a data control unit, and a memory block connected to the data control unit, and a read-out latch block connected between a read-out data line and the interface unit. The data control unit outputs data read out of the memory block to the read-out data line with a trailing edge of a clock being used as a trigger. The read-out latch block latches the data with a trailing edge of another clock, which is generated at least one cycle after the trailing edge of the aforementioned clock, being used as a trigger. The interface unit outputs the data to the external circuit with a leading edge of still another clock, which follows the aforementioned another clock, being used as a trigger.
    Type: Grant
    Filed: February 1, 2006
    Date of Patent: July 24, 2007
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Mariko Iizuka
  • Patent number: 7248539
    Abstract: A method for automated extraction of surface primitives from seismic data is presented. A preferred embodiment of the method includes defining, typically with sub-sample precision, positions of seismic horizons through an extrema representation of a 3D seismic input volume; deriving coefficients that represent the shape of the seismic waveform in the vicinity of the extrema positions; sorting the extrema positions into groups that have similar waveform shapes by applying classification techniques with the coefficients as input attributes using unsupervised or supervised classification based on an underlying statistical class model; and extracting surface primitives as surface segments that are both spatially continuous along the extrema of the seismic volume and continuous in class index in the classification volume.
    Type: Grant
    Filed: April 8, 2004
    Date of Patent: July 24, 2007
    Assignee: Schlumberger Technology Corporation
    Inventors: Hilde Grude Borgos, Paul Kvia, Thorleif Skov, Lars Sonneland, Trygve Randen
  • Patent number: 7248540
    Abstract: A circuit coupled to an array antenna, such as a sonar transducer array, for measuring the angle of orientation of an incident wave of radiation is formed of first and second channels coupled to respective portions of the antenna to sense delays between signals of the two channels. A memory retains data of earlier occurring lead and lag measurements. Any subsequent transition from a lead/lag to a lag/lead within a single signal pulse is sensed by a gating circuit which disgards the measurement so as to provide noise immunity.
    Type: Grant
    Filed: September 11, 1978
    Date of Patent: July 24, 2007
    Assignee: Raytheon Company
    Inventor: Arent H. Kits van Heyningen
  • Patent number: 7248541
    Abstract: An optical disk device has a recording information management portion which detects a distribution of a recorded region R and an unrecorded region M based on reflection light received by an optical head and an access target setting circuit which determines an access target of an optical head so as to make access to a target position of a recording layer of an optical disk while avoiding the unrecorded region M based on the detected distribution of the regions. Since an access is made while passing through only the recorded region R, a servo operation can be stabilized.
    Type: Grant
    Filed: July 30, 2003
    Date of Patent: July 24, 2007
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Minoru Yonezawa
  • Patent number: 7248542
    Abstract: A focus search driving voltage corresponding to a signal surface of an optical disc is obtained on the basis of detection information from a photodetector when an objective lens is focused on the signal surface of the optical disc in the middle of raising or lowering the objective lens placed on standby at a lens midpoint between a temporarily set lens bottom point and a temporarily set lens top point according to a temporarily set lens bottom point voltage and a temporarily set lens top point voltage.
    Type: Grant
    Filed: March 15, 2004
    Date of Patent: July 24, 2007
    Assignee: Victor Company of Japan, Limited
    Inventor: Jun Nakano
  • Patent number: 7248543
    Abstract: A highly accurate and stable tilt servo system is provided. A liquid crystal device for phase correction is driven based on drive data stored in a lookup memory to thereby make a tilt correction. Upon pre-processing, a pickup is moved to a predetermined position on the inner circumference of a disc for a tilt correction to employ tilt error data delivered from a tilt sensor as reference tilt error data and drive data served for the tilt correction as a reference tilt correction quantity. After the pre-processing, when the pickup is moved, the difference between the tilt error data delivered from the tilt sensor at each position of movement and the reference tilt error data is employed as a relative correction quantity. The drive data equivalent to the relative correction quantity is acquired from the lookup memory. The drive data acquired is added to the reference correction quantity to thereby determine a tilt correction quantity.
    Type: Grant
    Filed: July 23, 2003
    Date of Patent: July 24, 2007
    Assignee: Pioneer Corporation
    Inventors: Ryo Sato, Yoshio Sasaki
  • Patent number: 7248544
    Abstract: Disclosed is an optical head in which position adjustment of a photodetector light receiving surface or component parts may be simplified, production costs may be reduced and operational reliability may be improved. The optical head includes a light source 22, radiating light of a preset wavelength, an objective lens 27 for condensing the outgoing light from the light source 22 on an optical disc 2 and for condensing the return light from the optical disc 2, a beam splitter 25 for branching the optical path of the return light reflected by the optical disc 2, and for collimating the branched return light so as to be parallel to the outgoing light from the light source 22, a composite optical component including a splitting prism 30 arranged on a site of incidence of the branched return light for spatially splitting the return light, and a light receiving unit for receiving plural return light beams spatially split by the splitting prism 30 for producing focusing error signals.
    Type: Grant
    Filed: May 20, 2004
    Date of Patent: July 24, 2007
    Assignee: Sony Corporation
    Inventors: Masahiro Saito, Norio Fukasawa, Kiyoshi Toyota, Junichi Suzuki, Minoru Kubo, Souichi Murakami
  • Patent number: 7248545
    Abstract: According to the present invention, an optical pickup device forms one main spot, a first subspot, and a second subspot by irradiation of light on an optical disk having a groove part and a land part. The optical pickup device includes operation circuits which indicate a deviation between each of the optical spots and a track, and ? detecting means for detecting such an ? value that a difference in absolute value between SPP1 and ?SPP2 falls in a preset range, where an AC amplitude of a push-pull signal of the first subspot is SPP1, and an AC amplitude of a push-pull signal of the second subspot is SPP2, wherein SPP1??SPP2 (? is a constant) is a land/groove discriminating signal. With this, in the optical pickup device for recording and reproducing information on/from the optical disk having a land/groove part, it is possible to generate a land/groove discriminating signal and a tracking error signal without an offset, thereby performing excellent tracking control.
    Type: Grant
    Filed: April 23, 2002
    Date of Patent: July 24, 2007
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Takahiro Miyake
  • Patent number: 7248546
    Abstract: A data slice signal generation method of an optical disk drive, which uses a disk including header areas and data areas of different materials, includes the following steps. First, a data slice signal is generated according to the RF signal read by the optical pickup head of the optical disk drive, and the data slice values, reflecting the central levels of the RF signal, of the data slice signal at the beginnings of the header area and data area are preset. Secondly, when the optical pickup head of the optical disk drive enters a header area or a data area, the data slice signal takes the preset data slice value of the header area or data area, respectively. Then, the data slice signal is adjusted to approach the central levels of the waves of the RF signal by one wave after another.
    Type: Grant
    Filed: November 15, 2004
    Date of Patent: July 24, 2007
    Assignee: Mediatek Inc.
    Inventors: Hao-Yung Wang, Chi-Ming Chang
  • Patent number: 7248547
    Abstract: A defect signal detecting apparatus for an optical recording/reproducing apparatus that includes a maximum value detecting unit for detecting a highest amplitude among signals input during a maximum value detection period as a maximum value, a minimum value detecting unit for detecting a lowest amplitude among signals input during a minimum value detection period as a minimum value, an asymmetry detecting unit for calculating an amount ? of asymmetry by detecting a maximum value ILmax and a minimum value ILmin of a signal IL having a maximum periodicity among the signal input, and a maximum value ISmax and a minimum value ISmin of a signal IS having a minimum periodicity among the signal input, and a defect determining unit for determining whether there is a defect in the signal input, using the maximum value, the minimum value and the amount ? of asymmetry.
    Type: Grant
    Filed: October 8, 2003
    Date of Patent: July 24, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Eun-jin Ryu, Jae-wook Lee
  • Patent number: 7248548
    Abstract: When underflow of a sub-Q data table occurs, a sub-Q data processing section does not read and output sub-Q data but outputs only audio data. Moreover, to achieve consistency between audio data and the sub-Q data in terms of buffer management, an input processing section includes respective counters for managing respective input data amounts of the audio data and the sub-Q data. Then, the input processing section executes management so that overflow and underflow of the sub-Q data table are suppressed as much as possible and a switch changes an IEC output mode at a time of audio processing and a time of dubbing. Thus, sound deterioration, and error recording in equipment to which the audio player is connected, and the like can be prevented.
    Type: Grant
    Filed: August 4, 2006
    Date of Patent: July 24, 2007
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Seigo Suguta, Ichiro Kawashima, Hiroyuki Goto
  • Patent number: 7248549
    Abstract: A circuit locks onto a frequency of data encoded on a medium, taking frequency variations in the physical travel of the medium into account. The circuit includes a disk locked clock (DLC) circuit having a synthesizer operating under digital control based on a feedback signal to produce a servo reference clock and a read reference clock that track frequency variations in the physical travel of the medium. A recovered clock signal is produced based on the servo reference clock and the read reference clock. A digital phase locked loop maintains a frequency lock of the recovered clock signal. An error measurement circuit is connected to the digital phase locked loop. The error measurement circuit produces the feedback signal for digitally controlling the digital logic circuit synthesizer to produce the servo reference clock and the read reference clock that track frequency variations in the physical travel of the medium.
    Type: Grant
    Filed: July 30, 2004
    Date of Patent: July 24, 2007
    Assignee: Agere Systems Inc.
    Inventor: Richard Rauschmayer
  • Patent number: 7248550
    Abstract: Disclosed are a writing method and a disk recording apparatus for maintaining reproduction reliability relative to a rewritable disk recording medium of a zero link type. In one embodiment, a disk recording apparatus for a rewritable optical disk comprises a first timing detector having a first timing synchronized with a wobble reproduction signal of the rewritable optical disk, and a second timing detector having a second timing synchronized with a track reproduction signal of the rewritable optical disk. A phase difference detector is configured to detect a phase difference between the first timing and the second timing. A controller is configured to determine a recording area based on the detected phase difference. In another embodiment, a selector is configured to select a timing between the first timing and the second timing.
    Type: Grant
    Filed: July 23, 2003
    Date of Patent: July 24, 2007
    Assignees: Hitachi, Ltd., Hitachi-LG Data Storage, Inc.
    Inventor: Hiroshi Hirayama
  • Patent number: 7248551
    Abstract: A laser power control apparatus and method prevent fluctuation in the level of laser power due to a difference between reaction speeds of an automatic power controller according to write speeds of a disc drive. In the apparatus and method, laser power can be automatically controlled to prevent a variation in the level of laser diode driving voltage in read power periods, according to the write speeds of a disc drive, in a write mode. Thus, it is possible to prevent unstable operations of a servo circuit due to a variation of the level of laser power and further, prevent deterioration in the quality of the servo circuit due to a variation in the level of a wobble signal, thereby stabilizing recording characteristics of the disc drive.
    Type: Grant
    Filed: May 15, 2003
    Date of Patent: July 24, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Sung-un Yang
  • Patent number: 7248552
    Abstract: If data is recorded using a disc with deviating characteristics and a recorder with deviating characteristics, data will not be appropriately recorded, and errors will occur in the read signal. Standard recording pulse parameters specifying recording pulse positions for plural possible mark length and space length combinations are read from a writable optical disc, these standard recording pulse parameters are then used for test writing, the standard recording pulse parameters are changed uniformly or individually, a best recording pulse parameter is thus obtained, and jitter can be reduced.
    Type: Grant
    Filed: July 30, 2003
    Date of Patent: July 24, 2007
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shigeru Furumiya, Junichi Minamino, Mamoru Shoji
  • Patent number: 7248553
    Abstract: A laser power control device for use in an optical recording and/or reproducing apparatus that records data on and/or reproduces data from an optical recording medium by driving a laser diode with a laser diode driver.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: July 24, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung-du Kwon, Jun-hyuk Lee, Yong-jun Cho, Jung-koog Lee, Hyun-cheal Bang
  • Patent number: 7248554
    Abstract: A strategy process used for recording data on an optical disk is also used during DC erase is performed. Effects similar to those obtained in the case, in which a high frequency signal is superposed on a laser diode output current during the DC erase, can be obtained by performing the strategy process on the laser diode output current during the DC erase. This eliminates the necessity for generating high-level and high-frequency signals. Consequently, an apparatus can be constructed at low cost.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: July 24, 2007
    Assignee: Yamaha Corporation
    Inventors: Takashi Nagano, Koji Suzuki, Katsuichi Osakabe
  • Patent number: 7248555
    Abstract: A method and device for recording multiple information volumes on a record carrier, usually called multi-session recording, has a mapping unit (31) for opening a session by recording intro data including a first buffer zone at the beginning of the start zone of the volume, and a session control block (SDCB) in a remaining blank area of the start zone after the buffer zone. The session control block includes volume data indicative of the status and the contents of the session. The session is closed by recording session control data indicating that the information volume is closed in the remaining blank area, and closure data after the last user information recorded in the data zone for constituting the end zone of the volume. Further, the device has a detecting unit (32) for retrieving the session control block from said start zone.
    Type: Grant
    Filed: November 10, 2005
    Date of Patent: July 24, 2007
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Paulus Gijsbertus Petrus Weijenbergh, Jakob Gerrit Nijboer
  • Patent number: 7248556
    Abstract: A master memory device that stores a plurality of pages of information. An unexposed memory device (190) is adjacent to the master memory device (180). The unexposed memory device and the master memory device are separated by a gap. An aperture unit (130) is disposed in the gap. The aperture has a plurality of aperture openings. Each opening corresponds, in size, to an individual page constitutes of a column with specific multiplexing angles of memory in the master memory device. The aperture unit is located across a face of the master memory device such that the openings correspond to selected ones of the pages of information. A light source (120) generates a beam that transfers memory data from the master memory device to the unexposed memory device.
    Type: Grant
    Filed: April 26, 2002
    Date of Patent: July 24, 2007
    Assignee: Research Investment Network, Inc.
    Inventors: Idriss El Hafidi, Romualda Grzymala, Patrick Meyrueis
  • Patent number: 7248557
    Abstract: For the purpose of providing sector-address information on optical disks, a robust header is realized by utilizing a very simple encoding method that allows asynchronous reading. In order to provide robustness and reliability, the header uses a biphase data format to encode addressing information. The embossed header is further configured with redundant address-fields in a checkerboard pattern between adjacent tracks, in order to provide robustness for media-contamination. Each address-field starts with a unique address-mark and ends with parity-check information to provide reliable error-detection. The entire header can be decoded without the need for a slice-level, thus making it very tolerant to amplitude-variations and DC-offset variations. By combining these characteristics, a header is achieved which is reliable and inherently resistant to failures in providing sector-address information on optical disks.
    Type: Grant
    Filed: December 30, 2003
    Date of Patent: July 24, 2007
    Assignee: Plasmon LMS, Inc.
    Inventors: Johannes J. Verboom, John C. Rathe
  • Patent number: 7248558
    Abstract: Second digital information serving as copyright protection information can be stably and reliably read without any effect of a defect or pit missing on a disk-shaped recording medium. The second digital information is recorded onto a disk-shaped recording medium by wobbling a pit sequence recorded as a first signal. The second digital information is recorded so that a plurality of bits constituting the second digital information are allocated in a unit period of an identical sync signal contained in the first signal. During playback, the plurality of bits constituting the recorded second digital information are read a plurality of times every unit period of the sync signal, and information of the read bits is then integrated. Thus, information from a large number of wobbled pits across unit periods of a plurality of sync signals can be integrated to determine the bit values.
    Type: Grant
    Filed: December 26, 2003
    Date of Patent: July 24, 2007
    Assignee: Sony Corporation
    Inventors: Seiji Kobayashi, Jin Pan
  • Patent number: 7248559
    Abstract: A method and apparatus are provided for reducing the number of pilot symbols within a MIMO-OFDM communication system, and for improving channel estimation within such a system. For each transmitting antenna in an OFDM transmitter, pilot symbols are encoded so as to be unique to the transmitting antenna. The encoded pilot symbols are then inserted into an OFDM frame to form a diamond lattice, the diamond lattices for the different transmitting antennae using the same frequencies but being offset from each other by a single symbol in the time domain. At the OFDM receiver, a channel response is estimated for a symbol central to each diamond of the diamond lattice using a two-dimensional interpolation. The estimated channel responses are smoothed in the frequency domain. The channel responses of remaining symbols are then estimated by interpolation in the frequency domain.
    Type: Grant
    Filed: January 8, 2002
    Date of Patent: July 24, 2007
    Assignee: Nortel Networks Limited
    Inventors: Jianglei Ma, Ming Jia, Peiying Zhu, Wen Tong
  • Patent number: 7248560
    Abstract: A method for selecting an active router in a communication device includes providing multiple routers in the device, coupling the routers to a single physical link, monitoring a status for each of the routers, and selecting one of the routers as an active router by positioning its corresponding relay.
    Type: Grant
    Filed: June 4, 2002
    Date of Patent: July 24, 2007
    Assignee: Cisco Technology, Inc.
    Inventors: Dennis N. Blankenship, Michael H. Otto, Peter D. Beal, John M. Glotzer
  • Patent number: 7248561
    Abstract: In a communications network where multiple shared risk link groups are formed by links having a common risk, unreserved bandwidths are defined corresponding to all SRLG's and a maximum bandwidth of each link is set as an initial value of each of the defined unreserved bandwidths when a working path or a protection path of “1+1” or “1:1” recovery type is requested. When a protection path of “shared” recovery type is requested, unreserved bandwidths are defined corresponding to the SRLG's to which the links of its corresponding working path belong and a maximum bandwidth of each link is set as an initial value to each of the defined unreserved bandwidths. The bandwidth of the working or protection path is subtracted from each of the unreserved bandwidths. The request is rejected if a minimum of the subtracted values is smaller than a threshold.
    Type: Grant
    Filed: January 31, 2003
    Date of Patent: July 24, 2007
    Assignee: NEC Corporation
    Inventors: Osamu Ishibashi, Yoshihiko Suemura
  • Patent number: 7248562
    Abstract: An adaptive SVC caching method and system are provided to offload the high processing capacity burden of ATM switches. After an SVC is established in a usual way for a call, it is not torn down after the conversation ends. Instead, the SVC is kept alive for a variable duration (i.e., delayed release) with the expectation that there will be another call request for the same terminating end office during that time. The caching duration is adaptively changed with call arrival rate and call setup delay in the ATM network in order to stay within a delay budget specified by the requirements.
    Type: Grant
    Filed: December 17, 2001
    Date of Patent: July 24, 2007
    Assignee: AT&T Labs, Inc.
    Inventors: Yetik Serbest, Haifeng Bi, Samuel Sigarto
  • Patent number: 7248563
    Abstract: A system, method, and computer program product are disclosed for restricting access to a network using a network communications device. The network communications device includes multiple ports for providing access to a data processing system to the network. A specification of one of the multiple ports is received. A specification of a time period is also received. Access to the network is then blocked through the specified port during the specified time period.
    Type: Grant
    Filed: July 31, 2002
    Date of Patent: July 24, 2007
    Assignee: International Business Machines Corporation
    Inventors: Kulvir Singh Bhogal, Nizamudeen Ishmael, Jr., Mandeep Singh Sidhu
  • Patent number: 7248564
    Abstract: Packet round trip times (RTT) within a communication network are measured and from those measurements information regarding congestion conditions within the network is extracted. The RTT measurements are organized into an invariant distribution (a histogram) and an analytical tool which is designed to reveal periodicity information (such as a Fourier or wavelet transform, etc.) is applied to the distribution to obtain a period plot. From this period plot, bandwidth information (indicative of the congestion conditions and/or link capacities within the network) can be obtained.
    Type: Grant
    Filed: May 11, 2001
    Date of Patent: July 24, 2007
    Assignee: Network Physics, Inc.
    Inventors: Gilbert Grosdidier, Minh Duong-van, Tomas J. Pavel, Han C. Wen, Ian Adam, Richard Blanckenbecler
  • Patent number: 7248565
    Abstract: An IP-based node in communication with IP-based gateway devices is configured for executing circuit selection for a prescribed trunk group having multiple sets of connected trunk groups, the multiple sets of connected trunk groups managed by the respective IP-based gateway devices. The prescribed trunk group is configured for connecting with a two-way trunk group of a switch, for example a PSTN-based switch, having substantially more circuits than any one of the multiple sets of connected trunk groups for the IP-based gateway devices. The IP-based node executes circuit selection at least based on a first message, received from one of the IP-based gateway devices via an IP connection and specifying circuit availability for at least a portion of the corresponding set of connected trunk groups.
    Type: Grant
    Filed: May 16, 2002
    Date of Patent: July 24, 2007
    Assignee: Cisco Technology, Inc.
    Inventor: Henry Louis Fourie
  • Patent number: 7248566
    Abstract: Voice packets transmitted by an originating wireless user for use in a half-duplex communication mode in a one to many communication session are monitored for an unexpected cessation. If an unexpected cessation of such voice packets is detected for a predetermined time period, the session server controlling the communications session is notified to release the supporting half-duplex communication paths associated with the originating user.
    Type: Grant
    Filed: December 30, 2002
    Date of Patent: July 24, 2007
    Assignee: Lucent Technologies Inc.
    Inventors: Thomas Lloyd Hiller, Peter James McCann
  • Patent number: 7248567
    Abstract: The present invention integrates resource allocation between time division duplex (TDD) and frequency division duplex (FDD) in wireless communication systems. A radio network controller (RNC) receives a radio access bearer (RAB) request from a core network or a wireless receive/transmit unit. The RNC utilizes a TDD-FDD selector to assign radio resources in response to the request. The TDD-FDD selector evaluates various parameters regarding the received RAB request and determines whether it is preferable to assign TDD resources or FDD resources and whether such resources are currently available. Once resources are assigned, system conditions are evaluated to determine whether optimizations may be made to a current resource allocation.
    Type: Grant
    Filed: April 21, 2004
    Date of Patent: July 24, 2007
    Assignee: InterDigital Technology Corporation
    Inventors: Michel Desgagné, Teresa Joanne Hunkeler, Shamim Akbar Rahman
  • Patent number: 7248568
    Abstract: A wireless network according to the present invention includes a plurality of nodes that transmit and receive radio frequency (RF) signals. An access point broadcasts and receives radio frequency (RF) signals, wirelessly communicates with the plurality of nodes, generates a table containing a list nodes operating in the wireless network, and broadcasts the table to the plurality of nodes. The access point also calculates traffic conditions. A first node receives the table determines a hidden status of a second node in the table. The first node communicates directly with the second node if the second node has a not hidden status and communicates with the second node through the access point if the second node has a hidden status.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: July 24, 2007
    Assignee: Marvell International, Ltd.
    Inventors: Peter Loc, Joseph Knapp, Senthil K. Arumugham, Heng-Jui Hsu
  • Patent number: 7248569
    Abstract: A method and system for disconnecting a terminating connection leg in a dialed service for a mobile subscriber in an MSC in a mobile intelligent network. Upon receipt of Int_Disconnect_Leg (Leg2) from an SCP in a DP_Analysed_Info state in a call initialization procedure for handling of an MO or MF call, The MSC transmits Int_Disconnect_Leg_Ack to the SCP, releases Leg2, and enters a Leg2_Disconnected state. Upon receipt of Int_Continue in the Leg2_Disconnected state, the MSC sets “Result” to “Leg1_Only”. Upon receipt of Int_Continue_With_Argument in the Leg2_Disconnected state, the MSC modifies stored information by information included in the message, and sets “Result” to “Leg1_Only”. The MSC provides supplementary functions under the control of the SCP if “Result” is “Leg1_Only”.
    Type: Grant
    Filed: March 24, 2004
    Date of Patent: July 24, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Su-Jin Bae, Sung-Bum Kim
  • Patent number: 7248570
    Abstract: A system and method is provided for coordinating wireless bandwidth usage of a common frequency band by wireless nodes in two disjoint networks, such as an infrastructure (“IS”) network and an ad hoc (“AH”) network. When AH nodes move into the transmission range of an access point of the IS network, they register with the access point and listen to the access point to tell them when they are allowed to transmit data over a given transmission channel. The access point coordinates the bandwidth usage by broadcasting ad hoc mode poll signals to indicate that the ad hoc nodes may transmit over the channel, and sending infrastructure mode poll signals to indicate that a wireless node in the IS network can transmit over the given channel. The access point makes a fraction of the bandwidth available for communications by the wireless AH nodes in its transmission range, while guaranteeing the rest of the bandwidth for wireless nodes in the IS network.
    Type: Grant
    Filed: September 17, 2001
    Date of Patent: July 24, 2007
    Assignee: Microsoft Corporation
    Inventors: Pradeep Bahl, Paramvir Bahl
  • Patent number: 7248571
    Abstract: A method of transmitting speech frames in a TDMA network in which at least one time-slot of the TDMA frame is allocated to at least two users. The method comprises encoding user data from the at least two users into a single RLC/MAC block, allocating at least one time slot to the RLC/MAC block, and transmitting at least a portion of the encoded RLC/MAC block in the time-slot.
    Type: Grant
    Filed: March 14, 2000
    Date of Patent: July 24, 2007
    Assignee: Lucent Technologies Inc.
    Inventors: Constantin Ilas, Konstantinos Samaras, Jian Jun Wu
  • Patent number: 7248572
    Abstract: A mobile user terminal 402 accesses a packet data network 450 through one or more of several network access points 404–412. One or more control points 432–440 determines which network access point or points the user terminal is to access. Control may be retained in the current control point, or transferred to another control point, whenever it is convenient. There are preferably several routers, each having an associated home agent 418–420 which determines which foreign agents need to be accessed on behalf of each user terminal. There are several foreign agents 422–430, which forward packets received from a user terminal's home agent to the control point currently controlling communications with the user terminal.
    Type: Grant
    Filed: April 18, 2001
    Date of Patent: July 24, 2007
    Assignee: QUALCOMM Incorporated
    Inventors: Paul E. Bender, Matthew S. Grob, Robert H. Kimball, Gadi Karmi
  • Patent number: 7248573
    Abstract: An interface between a wireless node and a network node includes an encapsulator for temporarily converting data frames into Ethernet frames for the link between the two nodes and de-encapsulating the Ethernet frames before the data is processed at the network node.
    Type: Grant
    Filed: July 23, 2001
    Date of Patent: July 24, 2007
    Assignee: 3Com Corporation
    Inventors: Lee C Harrison, Edward Turner, Bryan J Donoghue, Tin Lam, Benjamin J O Kerr
  • Patent number: 7248574
    Abstract: The performance and ease of management of wireless communications environments is improved by a mechanism that enables access points (APs) to perform automatic channel selection. A wireless network can therefore include multiple APs, each of which will automatically choose a channel such that channel usage is optimized. Furthermore, APs can perform automatic power adjustment so that multiple APs can operate on the same channel while minimizing interference with each other. Wireless stations are load balanced across APs so that user bandwidth is optimized. A movement detection scheme provides seamless roaming of stations between APs.
    Type: Grant
    Filed: February 18, 2004
    Date of Patent: July 24, 2007
    Assignee: Autocell Laboratories, Inc.
    Inventors: Floyd Backes, Laura Bridge
  • Patent number: 7248575
    Abstract: A modular communications platform and method for processing a communications command are described. The communications platform provides an infrastructure for telephony service providers. The platform includes a connection logic control module for supporting network services, a service logic control module for providing call control support, a subscriber and policy service module to respond to subscriber and policy requests, and an FCAPS module to execute fault, configuration, accounting, performance, and security functions. The method can include the steps of receiving a communications command, generating an authentication request, generating an approval to the authentication request if the communications command is from an approved source, generating a billing request, generating a CPL script, generating instructions based on the CPL script, processing the instructions, generating a status report, and processing the billing request and a status report.
    Type: Grant
    Filed: August 29, 2002
    Date of Patent: July 24, 2007
    Assignee: Longboard, Inc.
    Inventors: William Leslie, Marcelo San Martin, Carrie Karnos, Chad Stalsworth, Dave Terry, Sekhar Banerjee
  • Patent number: 7248576
    Abstract: The invention relates to a system and method for changing protocol parameters of a signaling protocol for the implementation of services in an Intelligent Network concept with user data transfer via a packet network. Resources are provided in a service control point for parameter changes to be made in the context of the services to the signaling protocol used. Implementation of a service, which requires a change to a protocol parameter in the signaling protocol, correspondingly adapted intelligent network application part procedures are used by a service switching point to trigger the parameter changes to be made in an service control point and the change to the protocol parameter is effected by the service control point in the service switching point. The invention has the advantage that it allows parameter changes, which are not provided in the ISDN user part because of their relationship with the packet network.
    Type: Grant
    Filed: January 21, 2003
    Date of Patent: July 24, 2007
    Assignee: Siemens Aktiengesellschaft
    Inventor: Klaus Hoffmann
  • Patent number: 7248577
    Abstract: Modular internet telephony feature servers allow individual users to manage internet telephone calls. Modular internet telephony feature servers may be used in a hierarchical internet telephony system in which a higher tier internet telephony feature server forwards telephone calls to one or more lower tier internet telephony feature servers, and each lower tier internet telephony feature server is configurable separately from the higher tier internet telephony feature server and from other lower tier internet telephony feature servers to direct telephone calls received from the higher tier internet telephony feature server.
    Type: Grant
    Filed: December 5, 2003
    Date of Patent: July 24, 2007
    Assignee: Symbolic Intelligence Enhanced Systems, Inc.
    Inventor: Shigeaki Hakusui
  • Patent number: 7248578
    Abstract: A network hub includes a functionally integrated raster image processor. Such a functionally integrated raster image processor may be used in a network to prioritize the transmission of raster data so that the raster data is received for printing by a print engine such that it can operate synchronously with its demand.
    Type: Grant
    Filed: June 4, 2002
    Date of Patent: July 24, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: John William Lumley
  • Patent number: 7248579
    Abstract: A method and apparatus resynchronizes a link state database (LSDB) of router with the LSDB of a neighboring router (“neighbor”) while maintaining an existing adjacency with the neighbor in a computer network. An out-of-band resynchronization process executes on the routers to essentially maintain the existing adjacency between the router and neighbor, rather than resetting that adjacency as defined by a conventional resynchronization approach. By keeping the adjacency “up” from the perspective of a routing protocol, such as the Open Shortest Path First routing protocol, the adjacency can be used for continued data traffic to and from the router.
    Type: Grant
    Filed: October 15, 2002
    Date of Patent: July 24, 2007
    Assignee: Cisco Technology, Inc.
    Inventor: Barry D. Friedman