Patents by Inventor Hiroshi Furukawa
Hiroshi Furukawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9146896Abstract: A computer system that includes a central processing unit, a random-access-memory interface, a random-access memory whose addresses are allocated in an address space of the random-access-memory interface, and a reconfigurable arithmetic device is described herein. The reconfigurable arithmetic device includes input terminals, output terminals, a network of plurality of processor elements, a built-in random-access memory, a control unit, an inter-processor-element network and a configuration-data memory. In accordance with configuration on data from the configuration-data memory, the inter processor-element network is capable of changing the connection state of the input terminals and the output terminals to input ports and output ports of the plurality of processor elements, and the arithmetic function of the reconfigurable arithmetic device is capable of being dynamically changed.Type: GrantFiled: June 7, 2010Date of Patent: September 29, 2015Assignee: Cypress Semiconductor CorporationInventors: Hiroshi Furukawa, Ichiro Kasama
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Publication number: 20150036134Abstract: A physical quantity measuring system includes an optical source which emits a measurement light to fiber Bragg grating (FBG) lines containing FBGs connected in cascade by an optical fiber, an optical switch including a common port for receiving the measurement light from the optical source, and input/output ports connected to the FBG lines, the optical switch outputting the measurement light, from the common port to each of the input/output ports at different time points, a wavelength separator which receives light reflected from the respective FBGs of the FBG lines, and separating the reflected light into a plurality of component lights having predetermined wavelengths, after the measurement light is output from the input/output ports, and optical receivers which receives the component lights from the wavelength separator and detects light intensities of the component lights.Type: ApplicationFiled: July 31, 2014Publication date: February 5, 2015Applicant: ANRITSU CORPORATIONInventors: Takanori Saitoh, Hiroshi Furukawa
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Packet communication system, emission control apparatus, antenna control method and computer program
Patent number: 8937986Abstract: A packet communication system etc., is proposed, which can automatically adjusting the antenna directionality without modifying a wireless interface of a wireless packet forwarding device even if it involves fluctuation in the packet transmission timing due to CSMA/CA etc. An interference evasion unit involves fluctuation in packet transmission timing due to CSMA/CA. A radio emission device can control the emissive direction and/or emission intensity. A packet generation unit adjusts packet features other than its contents (e.g., packet length, transmission intensity) based on a switching sequence for specifying the emissive direction and/or emissive intensity, and generate a switching control packet. An emission control unit measures the switching control packet feature other than its contents, and identifies at least one bit as antenna control information.Type: GrantFiled: September 7, 2011Date of Patent: January 20, 2015Assignee: Kyushu University, National University CorporationInventors: Hiroshi Furukawa, Osamu Muta -
Patent number: 8693366Abstract: Provided are a communication system and the like capable of making a stable relay route even when a propagation channel is fluctuated by the fluctuation of RSSI. For making a tree-type communication route whose root is a core node, each slave node, after the reception of the latest reset routing packet from a node, judges if the transmission source node should be the parent of the tree-type structure based on the sequential average of the reception power of n routing packets received from the same transmission source node. As the reception power is log-normally distributed in general, an asymptotically stable relay route can be obtained, especially by using the sequential average.Type: GrantFiled: February 22, 2011Date of Patent: April 8, 2014Assignee: Kyushu University, National University CorporationInventors: Hiroshi Furukawa, Guangri Jin
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Publication number: 20140022934Abstract: A transmission period determination method, etc. capable of setting IPT transmission period by using general-purpose wireless modules and existing drivers is provided. A wireless communication system is a wireless backhaul. A route is established from a core node to a slave node. The core node assigns a specified transmission period and transmits a plurality of training packets to the slave node. The slave node transmits, to a transmission period determination device, the number of training packets received first and last and the number of training packets received without overlap. An estimation unit estimates a training time, the time for the slave node to receive the training packets. A calculation unit calculates a training metric candidate. An updating unit compares the values of the current training metric and the training metric candidate to determine the IPT transmission period.Type: ApplicationFiled: February 17, 2012Publication date: January 23, 2014Applicant: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATIONInventors: Hiroshi Furukawa, Guangri Jin
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PACKET COMMUNICATION SYSTEM, EMISSION CONTROL APPARATUS, ANTENNA CONTROL METHOD AND COMPUTER PROGRAM
Publication number: 20130272345Abstract: A packet communication system etc., is proposed, which can automatically adjusting the antenna directionality without modifying a wireless interface of a wireless packet forwarding device even if it involves fluctuation in the packet transmission timing due to CSMA/CA etc. An interference evasion unit involves fluctuation in packet transmission timing due to CSMA/CA. A radio emission device can control the emissive direction and/or emission intensity. A packet generation unit adjusts packet features other than its contents (e.g., packet length, transmission intensity) based on a switching sequence for specifying the emissive direction and/or emissive intensity, and generate a switching control packet. An emission control unit measures the switching control packet feature other than its contents, and identifies at least one bit as antenna control information.Type: ApplicationFiled: September 7, 2011Publication date: October 17, 2013Applicant: Kyushu University, National University CorporationInventors: Hiroshi Furukawa, Osamu Muta -
Publication number: 20130256968Abstract: An image processor applies a RIP process to PDL data in order of the first through the n-th sheets to convert it into a scanning line type image data. An image forming section 5 receives the image data in sequence to form the image on the sheets. A controller 45 determines whether the RIP process is required for the image data of the n-th sheet or a rear cover. If no RIP process is required, the controller notifies the image forming section of non-RIP process for the n-th sheet. The RIP processed image data for the first through the n-1th sheets is applied to the image forming section. A waiting time for the image data transmission can be reduced. If the rear cover is blank, the high speed ring binding job can be established.Type: ApplicationFiled: March 28, 2013Publication date: October 3, 2013Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventor: Hiroshi FURUKAWA
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Patent number: 8526365Abstract: There is proposed a network system and the like achieving a packet relay transmission with high relay transmission efficiency according to Intermittent Periodic Transmit method (IPT). In order to achieve Intermittent Periodic Transmit in a mesh cluster, a communication control unit of a core node selects one of a plurality of communication units according to downlink priority and causes the selected communication unit to transmit a packet with a periodic interval. In order to transmit a packet from the core node to another slave node, a communication control unit of a slave node selects one of the communication units according to downlink priority, and in order to transmit a packet from a slave node to the core node, the communication control unit of the slave node selects one of the communication units according to uplink priority. Then, the communication control unit causes the selected communication unit to transmit the packet.Type: GrantFiled: January 28, 2009Date of Patent: September 3, 2013Assignee: Kyushu University, National University CorporationInventor: Hiroshi Furukawa
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Patent number: 8480314Abstract: A method of butting and connecting a first optical fiber and a second optical fiber in an optical connector comprises placing said optical connector that holds said first optical fiber in wherein an optical fiber connection tool; mounting said optical fiber holder on a holder mounting base of a front end bevel processing tool; processing a front end face of said second optical fiber such that said front end face of said second optical fiber is beveled relative to the surface perpendicular to the optical fiber axis direction; transferring said optical fiber holder to said holder support base; and moving said optical fiber holder toward said optical connector along said guide part, and butting and connecting the beveled front end face of said second optical fiber to the front end face of said first optical fiber such that their bevel directions are aligned.Type: GrantFiled: December 10, 2010Date of Patent: July 9, 2013Assignee: Fujikura Ltd.Inventors: Daigo Saito, Kazuhiro Takizawa, Hiroshi Furukawa, Serin Khee Yen Tan, Quang Minh Ngo
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Patent number: 8478330Abstract: A transmission power control technique allowing stable and reliable signal transmission in soft handover is disclosed. Each of the base stations involved in soft handover measures an amount of loss of the base station selection signal. When the amount of loss of the base station selection signal exceeds a threshold, the transmission power of the downlink signal is not set to the minimum level but to the normally controlled level. Further, a transmission power update timing of each base station is determined so that the downlink signal received at the mobile station changes in transmission power at a predetermined timing synchronized with that of other base stations.Type: GrantFiled: February 10, 2011Date of Patent: July 2, 2013Assignee: NEC CorporationInventor: Hiroshi Furukawa
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Patent number: 8352533Abstract: There is provided a semiconductor integrated circuit including: a plurality of first logic blocks which are reconfigurable, the plurality of first logic blocks inputting data of a first bit width and performing computation; a first network connecting the plurality of first logic blocks in a dynamically reconfigurable manner; a plurality of second logic blocks inputting data of a second bit width different from the first bit width and performing computation; a second network connected to outputs of the plurality of second logic blocks; and a third network connecting a carry bit output of a computing unit included in the first logic block to an input of a computing unit included in the second logic block in a dynamically reconfigurable manner.Type: GrantFiled: December 11, 2008Date of Patent: January 8, 2013Assignee: Fujitsu Semiconductor LimitedInventor: Hiroshi Furukawa
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Publication number: 20120320781Abstract: Provided are a communication system and the like capable of making a stable relay route even when a propagation channel is fluctuated by the fluctuation of RSSI. For making a tree-type communication route whose root is a core node, each slave node, after the reception of the latest reset routing packet from a node, judges if the transmission source node should be the parent of the tree-type structure based on the sequential average of the reception power of n routing packets received from the same transmission source node. As the reception power is log-normally distributed in general, an asymptotically stable relay route can be obtained, especially by using the sequential average.Type: ApplicationFiled: February 23, 2011Publication date: December 20, 2012Applicant: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATIONInventors: Hiroshi Furukawa, Guangri Jin
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Publication number: 20120307302Abstract: A connection recognition section for recognizing that the unit is mounted and/or the external device is connected and a control section for managing the unit and/or external device and managing the job are provided, wherein the control section responds to the recognition results from the connection recognition section, and checks to determine whether the unit is mounted or dismounted and/or external device is connected or disconnected. When jobs are being created, it is possible to create any inexecutable job under the current apparatus configuration on the assumption that the not yet mounted unit and/or not yet connected external device being managed is used.Type: ApplicationFiled: May 30, 2012Publication date: December 6, 2012Inventor: Hiroshi FURUKAWA
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Patent number: 8135421Abstract: The above base-station cell design method is for sequentially adding base stations, and a technique of which throughput is few is employed for a radio-wave propagation characteristic evaluation to be made in this addition, and a technique of which the throughput is much, but which is of high-precision, more specifically, a technique such as the ray tracing is applied for the radio-wave propagation characteristic evaluation to be made after addition. The result of the high-precision radio-wave propagation characteristic evaluation to be made after this addition is put to practical use for estimating an interference quantity in selecting the arrangement location of the base station to be added newly. This allows the quantity of the radio wave analytic processing, which accounts for a large majority of the base-station cell design processing, to be reduced, thus enabling a fast base-station cell design.Type: GrantFiled: February 21, 2006Date of Patent: March 13, 2012Assignee: NEC CorporationInventors: Hiroshi Furukawa, Koichi Ebata
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Publication number: 20110292091Abstract: A display unit includes: a display section having a plurality of light-emitting devices arranged in a straight line; a driving section supplying a display driving signal for controlling the luminance of each of the light-emitting devices; and a display control section connected to the driving section for supplying the driving section with either a first display control signal for controlling the luminance of the light-emitting devices to display a preset display pattern according to an operation control signal from a controller or a second display control signal for controlling the luminance of the light-emitting devices in synchronism with the level of an audio signal, wherein the first display control signal is generated based on a wave function.Type: ApplicationFiled: May 25, 2011Publication date: December 1, 2011Applicant: Sony CorporationInventors: Masao Kondo, Mitsuaka Kimura, Junko Teshima, Yoshihide Kurimoto, Takayuki Fujishima, Hiroshi Furukawa, Akio Suzuki
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Patent number: 8027275Abstract: A control packet is broadcast over a route, containing first and second metric values of different transmission characteristics of the route. At a local node, control packets from multiple nodes are received and examined for their source. If the packets are received from upstream nodes, the metrics of the received packets are updated, the second metric is weighted and summed with the first metric to produce a number of combined metrics and a minimum value of the combined metrics is detected. One of the routes having the detected value is selected as a route to an upstream node. If the control packets are received from downstream nodes, the second metric is weighted and summed with the first metric to produce a number of combined metrics and a smaller values of combined metrics are detected corresponding in number to usable antennas and routes of the detected values are selected.Type: GrantFiled: March 20, 2003Date of Patent: September 27, 2011Assignee: NEC CorporationInventors: Koichi Ebata, Hiroshi Furukawa
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Publication number: 20110194128Abstract: An image forming apparatus, including: an image forming unit to perform an image formation on paper; a storage unit to store a printing rate coefficient corresponding to one of printing rate levels, the printing rate levels being a plurality of levels into which a printing rate is divided, the printing rate coefficient being stored for each of the printing rate levels; a coefficient changing operation section for changing a printing rate coefficient for each of the printing rate levels; and a control unit to calculate a printing rate on each page of the paper on which the image formation is performed, to read a printing rate coefficient, corresponding to one of the printing rate levels to which the calculated printing rate belongs, from the storage unit, and to add up the read printing rate coefficient as a count coefficient.Type: ApplicationFiled: February 1, 2011Publication date: August 11, 2011Applicant: KONICA BUSINESS TECHNOLOGIES, INC.Inventors: Susumu KURIHARA, Masaru OHTSUKA, Hiroshi FURUKAWA
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Publication number: 20110157641Abstract: In an image forming system configured with image forming apparatuses and an administration server connected with the image forming apparatuses thereof via Internet, the image forming unit, mounted at the image forming section in a detachable manner, stores unit information which includes identification data and information of times of use. An operation section creates unit replacing permission information to permit the image forming unit to be dismounted from the image forming section. A control section receives the unit replacing permission information and reads out the unit information. The communication section transmits the unit information to the administration server. Whereby, the administration server can recognize the image forming unit dismounted from the image forming section and the times of used of the image forming unit just before dismounting, therefore the burden of the service engineer can be reduced.Type: ApplicationFiled: December 17, 2010Publication date: June 30, 2011Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventor: Hiroshi FURUKAWA
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Patent number: 7971011Abstract: A remote copy method for copying data within a first storage apparatus to a second storage apparatus via a network, includes transmitting data from the first storage apparatus in units of first buffer sets each formed by a plurality of first recording exclusive buffers within the first storage apparatus, and receiving the data by the second storage apparatus in units of second buffer sets each formed by a plurality of second recording exclusive buffers within the second storage apparatus, so as to maintain a sequence guarantee with respect to the data that is copied.Type: GrantFiled: July 20, 2005Date of Patent: June 28, 2011Assignee: Fujitsu LimitedInventors: Hiroshi Furukawa, Hiroshi Okamoto
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Publication number: 20110130145Abstract: A transmission power control technique allowing stable and reliable signal transmission in soft handover is disclosed. Each of the base stations involved in soft handover measures an amount of loss of the base station selection signal. When the amount of loss of the base station selection signal exceeds a threshold, the transmission power of the downlink signal is not set to the minimum level but to the normally controlled level. Further, a transmission power update timing of each base station is determined so that the downlink signal received at the mobile station changes in transmission power at a predetermined timing synchronized with that of other base stations.Type: ApplicationFiled: February 10, 2011Publication date: June 2, 2011Applicant: NEC CORPORATIONInventor: Hiroshi Furukawa