Patents Assigned to Fujitsu Limted
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Patent number: 9002360Abstract: There is provided a reception quality measurement method that measures reception quality of a measurement target cell with a mobile terminal apparatus. The method includes performing reception quality measurements in a certain bandwidth with respect to each of a plurality of frequencies in a frequency band of the measurement target cell when the frequency band of the measurement target cell and a frequency band of a neighboring cell overlap with each other, and averaging results of the reception quality measurements at the plurality of frequencies to obtain an averaged value as the reception quality of the measurement target cell.Type: GrantFiled: July 2, 2013Date of Patent: April 7, 2015Assignee: Fujitsu LimtedInventor: Satoshi Mikami
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Patent number: 8930485Abstract: By generating second data transfer status managing information for managing a data transfer status between the first storing unit and a third storing unit provided in the second storage apparatus, and third data transfer status managing information for managing data transfer status between the second storing unit and a fourth storing unit provided in the second storage apparatus based on the first data transfer status managing information; and transferring data between the first storing unit and the third storing unit based on the second data transfer status managing information, transferring data between the second storing unit and the fourth storing unit based on the third data transfer status managing information, and transferring the first data transfer status managing information, the data transfer status between multiple storing units in a migrating storage apparatus may be reproduced in another migrated storage apparatus.Type: GrantFiled: August 20, 2012Date of Patent: January 6, 2015Assignee: Fujitsu LimtedInventor: Akihiro Ueda
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Patent number: 8634454Abstract: A receiver circuit includes: an equalization circuit that equalizes a first signal to obtain a second signal, and adjusts a characteristic of an equalization in accordance with an error between the second signal and a third signal; and a first offset adjustment circuit that adjusts an offset of the first signal in accordance with an error signal indicating the error.Type: GrantFiled: June 29, 2010Date of Patent: January 21, 2014Assignee: Fujitsu LimtedInventors: Masaya Kibune, Hirotaka Tamura
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Patent number: 8396500Abstract: A connection destination base station determination device is disclosed that includes: a storage part configured to store information indicating a radio base station that has transmitted a signal received with intensity at or above a certain level in a mobile terminal, and information indicating the amount of available resources in the radio base station; a selection part configured to select, of radio base stations having the amount of available resources greater than or equal to the amount of resources requested by the mobile terminal, a radio base station different from a radio base station having the largest amount of available resources as a connection destination radio base station; and a notification part configured to notify the selected radio base station that the mobile terminal is to be connected thereto.Type: GrantFiled: October 27, 2003Date of Patent: March 12, 2013Assignee: Fujitsu LimtedInventors: Hiroshi Fujita, Yoshiharu Tajima, Atsuya Tanaka
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Patent number: 8379690Abstract: A wireless receiver receives a signal obtained by multiplexing a plurality of signals that include a synchronization signal that is spread using a non-orthogonal code not orthogonal to a code for spreading other signals other than the synchronization signal. Then, in a case when the signals other than the synchronization signal are the target signals for decoding, the wireless receiver performs despreading with respect to the received signal using the synchronization signal and estimates the signal amplitude of the non-orthogonal code. Subsequently, the wireless receiver eliminates the spread synchronization signal from the received signal using the estimated signal amplitude of the non-orthogonal code and using the synchronization signal. Eventually, the wireless receiver performs despreading and demodulation with respect to the signal having the spread synchronization signal eliminated therefrom and decodes the target signals for decoding.Type: GrantFiled: September 29, 2010Date of Patent: February 19, 2013Assignee: Fujitsu LimtedInventor: Tsuyoshi Hasegawa
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Publication number: 20130005375Abstract: A method for implementing coordinated resource allocations includes establishing one or more wireless connections using a first channel with one or more endpoints via at least one remote transceiver. The method further includes determining a schedule that assigns a first number of resource blocks to each endpoint of the one or more endpoints. The method additionally includes receiving one or more neighboring transceiver schedules determined by one or more neighboring base stations. Each neighboring transceiver schedule indicating a different number of resource blocks assigned to each neighboring remote transceiver connected to the respective neighboring base station. The method also includes determining one or more time slots and subcarriers within the first channel to assign to each resource block for each endpoint of the one or more endpoints based on the schedule and the neighboring transceiver schedules.Type: ApplicationFiled: June 30, 2011Publication date: January 3, 2013Applicant: Fujitsu LimtedInventor: Wei-Peng Chen
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Patent number: 8320335Abstract: A wireless communication system is disclosed including a MIMO wireless communication apparatus that can communicate through multiple antennas and a non-MIMO wireless communication apparatus that can communicate through a single antenna or multiple antennas. The MIMO wireless communication apparatus includes a communication unit configured to transmit and receive control information divided into a second control information containing information related to the demodulation and decoding of traffic channel and a first control information containing information related to the MIMO separation of the second control information.Type: GrantFiled: June 15, 2011Date of Patent: November 27, 2012Assignee: Fujitsu LimtedInventors: Takashi Dateki, Tetsuya Yano
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Patent number: 8306369Abstract: An optical hybrid circuit includes a multimode interference coupler; a first 2:2 optical coupler; a second 2:2 optical coupler; a third 2:2 optical coupler; and a phase controlling region. The first 2:2 optical coupler, the second 2:2 optical coupler, and the third 2:2 optical coupler are coupled to one of the pair of first output channels, the pair of second output channels, the pair of third output channels, and the pair of fourth output channels of the multimode interference coupler. The phase controlling region is provided in one or both of each pair of at least two pairs of output channels from among three pairs of output channels to which the first 2:2 optical coupler, the second 2:2 optical coupler, and the third 2:2 optical coupler are coupled, respectively.Type: GrantFiled: December 17, 2010Date of Patent: November 6, 2012Assignee: Fujitsu LimtedInventor: Seok Hwan Jeong
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Patent number: 8068744Abstract: In an optical transmitter comprising a directly modulated laser and a wavelength filter provided on a post-stage of the directly modulated laser, the wavelength filter has a modulated light input port for inputting modulated light output from the directly modulated laser, a filter transmitted light output port for outputting light having a wavelength included in a filter transmission band among the modulated light as filter transmitted light, and a filter cutoff light output port provided separately from the modulated light input port and the filter transmitted light output port and outputting light having a wavelength included in a filter cutoff band among the modulated light as filter cutoff light, and the peak of the filter transmission band is set on a shorter-wave side from the peak of the spectrum of modulated light output from the directly modulated laser.Type: GrantFiled: April 30, 2010Date of Patent: November 29, 2011Assignee: Fujitsu LimtedInventors: Suguru Akiyama, Tsuyoshi Yamamoto
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Publication number: 20110239209Abstract: A system for performing remote maintenance an electronic network serving a plurality of clients may comprise a central server, a first client system hosting first virtual machine, and a receiver associated with the first client system. The central server may broadcast a list of updated software modules available for delivery to the plurality of client systems. The first client system may including a plurality of nodes, each one of the plurality of processing resources having a respective set of processing instructions stored on an respective associated computer readable memory. The receiver may be operable to receive the list broadcast by the central server. The first virtual machine may be operable to determine whether to request any of the updated software modules on the received list based at least in part on the identity of the plurality of nodes of the first client system. The receiver may be operable to receive any updated software module requested by the first virtual machine.Type: ApplicationFiled: September 10, 2010Publication date: September 29, 2011Applicant: Fujitsu LimtedInventors: Seigo Kotani, Masato Suzuki
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Patent number: 7974448Abstract: A personal authentication system using biometrics information, which identifies or authenticates an individual by verifying to-be-verified biometrics characteristic data against previously registered biometrics characteristic data. The system includes a biometrics information inputting section having a function to acquire the to-be-verified biometrics information; a biometrics information converting section converting said to-be-verified biometrics information, acquired through said biometrics information inputting section, into a state to be acquired on a predetermined acquisition condition, said predetermined acquisition condition being a same condition under which the registered biometric information was acquired; and a biometrics characteristic data extracting section extracting to-be-verified biometrics characteristics data from the to-be-verified biometrics information obtained by the conversion in said biometrics information converting section.Type: GrantFiled: January 23, 2006Date of Patent: July 5, 2011Assignee: Fujitsu LimtedInventors: Takashi Shinzaki, Yusaku Fujii
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Patent number: 7659888Abstract: An electronic apparatus of the present invention has a first unit and a second unit coupled to the first unit through a coupling section which allows the second unit to be opened and closed relative to the first unit and the second unit has a display screen with a pen input function for detecting the contact of a pen or the close position of a pen. The first unit includes a bottom cover, a circuit substrate arranged above the bottom cover, and an upper cover arranged above the circuit substrate. The circuit substrate has a DC-DC converter that is disposed thereon and provided with one or more coils that generate power for operating the electronic apparatus, and at least one of the coils is disposed on the surface of the circuit substrate facing the bottom cover.Type: GrantFiled: June 3, 2005Date of Patent: February 9, 2010Assignee: Fujitsu LimtedInventors: Masahiko Kyouzuka, Masahiko Sato, Takashi Yoshida
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Patent number: 7525762Abstract: A perpendicular magnetic recording medium at least comprises a perpendicular magnetic recording layer and a backing layer backing the perpendicular magnetic recording layer. The backing layer has an in-plane magnetization and is formed of a ferrimagnetic material having a compensation temperature in the vicinity of a recording/reproducing temperature in which reproducing of magnetic information is made from the perpendicular magnetic recording layer. A magnetic storage apparatus for recording and reproducing magnetic information using the perpendicular magnetic recording medium is also disclosed.Type: GrantFiled: November 20, 2003Date of Patent: April 28, 2009Assignee: Fujitsu LimtedInventors: Ryosaku Inamura, Kazumasa Shimoda, Toshio Sugimoto, Takuya Uzumaki
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Publication number: 20080252265Abstract: A detection circuit that reduces circuit scale. A plurality of current amplifiers respectively generate a plurality of detection signals corresponding to current flowing to a plurality of resistors. An error amplifier coupled to the plurality of current amplifiers compares the plurality of detection signals with a plurality of reference signals, respectively, to generate an error signal based on the comparison.Type: ApplicationFiled: February 14, 2008Publication date: October 16, 2008Applicant: Fujitsu LimtedInventors: Masatoshi Kokubun, Takashi Matsumoto, Hidenobu Ito
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Patent number: 7298616Abstract: A fan housing of a fan unit includes a housing wall standing from the surface of a printed circuit board. The printed circuit board serves to establish the fan housing in cooperation with the housing wall. The fan housing further includes a ceiling wall connected to the housing wall. The ceiling wall extends along a datum plane parallel to the surface of the printed circuit board. A high speed airflow can be generated within the fan housing. The airflow promotes the heat radiation from the printed circuit board. An electrically conductive wiring pattern extending over the surface of the printed circuit board may further promote the heat radiation from the printed circuit board.Type: GrantFiled: March 8, 2006Date of Patent: November 20, 2007Assignee: Fujitsu LimtedInventors: Atsuko Tanaka, Masuo Ohnishi
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Patent number: 7295483Abstract: A partial area for retaining data during low power consumption mode is composed of a single first memory cell out of a plurality of memory cells connected to a bit line. An operation control circuit operates any of the memory cells selected in accordance with an address signal during normal operation mode for performing a read operation and a write operation. The operation control circuit keeps latching data retained by the first memory cell in the partial area into a sense amplifier during the low power consumption mode. This eliminates the need for a refresh operation for retaining the data in the first memory cell during the low power consumption mode. Since the data can be retained without a refresh operation, it is possible to reduce the power consumption during the low power consumption mode.Type: GrantFiled: August 31, 2006Date of Patent: November 13, 2007Assignee: Fujitsu LimtedInventors: Naoharu Shinozaki, Yasurou Matsuzaki
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Patent number: 7109775Abstract: A delay circuit includes: an input signal line (IN) through which an input signal is inputted; a capacitor (106) charged with and discharging electric charge; a first switch (101) connected to the input signal line and operating according to the input signal when the capacitor is to be charged with electric charge; a second switch (102) connected to the input signal line and operating according to the input signal when the electric charge is to be discharged from the capacitor; and a comparison circuit (107) comparing a voltage of the capacitor and a reference voltage to output a delay signal of the input signal.Type: GrantFiled: April 21, 2005Date of Patent: September 19, 2006Assignee: Fujitsu LimtedInventor: Hiroyoshi Tomita
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Patent number: 6893677Abstract: A method for forming a coating film on an internal surface of an elongated tube, includes longitudinally holding the elongated tube, applying a coating solution to the internal surface of the elongated tube; and drying the coating solution while carrying out a heat process for sequentially heating the elongated tube by using a heat source. The heat process includes adjusting the descending rate of the heat source so that a through-hole in the elongated tube is clogged with the coating solution whose viscosity is reduced by heating of the heat source, and sucking the through-hole in the elongated tube from the lower side thereof so that a portion of the through-hole that is clogged with the coating solution moves downwards along the elongated tube.Type: GrantFiled: March 20, 2003Date of Patent: May 17, 2005Assignee: Fujitsu LimtedInventors: Hitoshi Yamada, Akira Tokai, Manabu Ishimoto, Kenji Awamoto, Tsutae Shinoda
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Patent number: 6862726Abstract: Light intensities at light intensity calculation points on the photomask are found approximately based on distances from barycenters of opening patterns, and areas and transmission factors of the opening patterns. Thereafter, the result is added to a distribution of light intensity which is obtained by the conventional simulation without consideration given to the influence of the local flare. According to such a method, it is possible to easily carry out the simulation of the light intensity with high accuracy.Type: GrantFiled: January 30, 2003Date of Patent: March 1, 2005Assignee: Fujitsu LimtedInventors: Hiroki Futatsuya, Morimi Osawa
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Publication number: 20040169277Abstract: Conductive or solder bumps are stacked between a mounted component such as a BGA device and a printed wiring substrate in a multileveled printed circuit board unit. An interposer or relay substrate is interposed between the adjacent stacked conductive bumps. The interposer substrate is made of a porous material. When any difference in the expansion is caused between the printed wiring substrate and the mounted component, one side of the interposer substrate receives a relatively smaller displacement force while the other side of the interposer substrate receives a relatively larger displacement force. A shearing stress is induced in the interposer substrate. Deformation of the porous material serves to absorb the shearing stress in the interposer substrate. The conductive bumps bonded on one side of the interposer substrate as well as the conductive bumps bonded on the other side of the interposer substrate may be relieved from a shearing stress.Type: ApplicationFiled: December 30, 2003Publication date: September 2, 2004Applicant: Fujitsu LimtedInventor: Shinji Matsuda