Hiroshi Furukawa
Hiroshi Furukawa, Fukuoka JP
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20100067365 | TRANSMISSION SYSTEM, TRANSMISSION METHOD, TRANSMITTER, RECEIVER, DECODING METHOD, AND DECODER - A transmission system capable of obtaining an effect of orthogonality among time block codes and an effect of path diversity on a distorted channel is provided. In the transmission system including: a transmitter device transmitting an information signal S[n] multiplied by a code, the code being a time block code constituted by a plurality of time series symbols, the transmitter device multiplying the information signal by a plurality of the time block codes, respectively, multiplexing multiplication results on a time axis and transmitting multiplexed signals; and a receiver device including a reception filter, if an impulse response matrix of a channel is a matrix H, a characteristic of the reception filter is set to be represented by a complex conjugate transpose matrix H | 03-18-2010 |
20110090835 | NETWORK SYSTEM, NODE,PACKET FORWARDING METHOD, PROGRAM, AND RECORDING MEDIUM - There are proposed: a network system capable of realizing packet forwarding higher in packet forwarding efficiency than in conventional Intermittent Periodic Transmit (IPT) using omni-directional antennas; and the like. Directional antennas are applied to the IPT, and each of slave nodes waits for reception of downlink packets by a directional antenna for receiving the downlink packets in a reception waiting state therefor. Moreover, the downlink packets are treated like polling control signals, and uplink packets are transmitted at a reception time of the downlink packets, whereby a hidden node problem and a carrier sensing problem can be avoided. Furthermore, in accordance with routing protocol in which each of nodes changes directivity randomly by a route formation process, it becomes possible to form a more suitable route. | 04-21-2011 |
20110110233 | NETWORK SYSTEM, NODE, PACKET FORWARDING METHOD, PROGRAM, AND RECORDING MEDIUM - 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. | 05-12-2011 |
20120320781 | COMMUNICATION SYSTEM, A SLAVE NODE, A ROUTE MAKING METHOD AND A PROGRAM - 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. | 12-20-2012 |
20140022934 | TRANSMISSION PERIOD DETERMINATION METHOD, TRANSMISSION PERIOD DETERMINATION DEVICE AND PROGRAM - 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. | 01-23-2014 |
Hiroshi Furukawa, Sakura-Shi JP
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20110079930 | CONNECTION METHOD, CONNECTION TOOL, AND CONNECTION JIG FOR OPTICAL FIBER - 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. | 04-07-2011 |
Hiroshi Furukawa, Yokohama JP
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20100332795 | COMPUTER SYSTEM INCLUDING RECONFIGURABLE ARITHMETIC DEVICE AND RECONFIGURABLE ARITHMETIC DEVICE - A computer system includes a central processing unit, a random-access-memory interface, a random-access memory in which addresses are allocated in an address space of the random-access-memory interface and a reconfigurable arithmetic device whose arithmetic function is capable of being dynamically changed in accordance with configuration data. The reconfigurable arithmetic device includes input terminals, output terminals, a plurality of processor elements that perform individual arithmetic processes in synchronization with a clock, an inter-processor-element network which connects the input terminals and the output terminals to input ports and output ports of the plurality of processor elements, a random-access memory built into the reconfigurable arithmetic device and a control unit that sets the plurality of processor elements and the inter-processor-element network. | 12-30-2010 |
Hiroshi Furukawa, Kawasaki JP
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20080205582 | PROCESSING ELEMENT AND RECONFIGURABLE CIRCUIT INCLUDING THE SAME - A processing element includes a shift register including n stages of registers mutually connected in series. Data held among the n stages of registers is rotated in synchronization with a clock signal. A number-of-stages determining circuit determines the number of stages to be used among the n stages of registers. An output terminal of the register in the last stage connects to an input terminal of the register in the first stage. | 08-28-2008 |
20080208940 | RECONFIGURABLE CIRCUIT - A reconfigurable circuit including a multiplier for multiplying a value, an accumulator for cumulatively adding said multiplied value and a round-off processing unit for rounding off said cumulatively added value; wherein said multiplier, said accumulator and said round-off processing unit are disposed within a single processing element and said accumulator provides an output at a timing according to a control signal. | 08-28-2008 |
20090271461 | SEMICONDUCTOR INTEGRATED CIRCUIT - 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. | 10-29-2009 |
Hiroshi Furukawa, Sagamihara JP
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20090172144 | ID COLLECTION AND MANAGEMENT APPARATUS, METHOD AND PROGRAM OF COMPUTER - An ID collection and management apparatus which manages identifiers of computers in a computer system including said computers and a storage system which provides said computers with a storage volume, including: a first ID acquisition unit which acquires first IDs which are IDs of a data port for said computers to transmit/receive data with said storage volume; a second ID acquisition unit which acquires second IDs to be recognized as the IDs of said computers by said storage system; and an ID management unit which manages said first IDs and said second IDs in a corresponding manner for each of said computers; wherein a first communication protocol for communication with said computers is different from a second communication protocol for communication with said storage system, wherein the first IDs are based on requirements of the first communication protocol, and the second IDs are based on requirements of the second communication protocol, such that the first IDs and second IDs differ from each other. | 07-02-2009 |
Hiroshi Furukawa, Tokyo JP
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20080288825 | STORAGE SUBSYSTEM, STORAGE SYSTEM, AND COMMUNICATION CONTROL METHOD - In a storage subsystem which is connected to an IP network, by excluding an improper packet, security is heightened, and a performance of communication to a logical unit of storage subsystem is maintained and secured. In the storage subsystem, a function which carries out filtering of a packet other than an iSCSI packet is provided. With respect to only the packet passed through the function, its accessibility to the logical unit is filtered. Also, traffic of all received packets, and a traffic lob of a packet judged to be discarded by the above filtering is recorded. By using this information, controlling such as a cut-off process of improper communication, QoS securement for normal communication and so on, are carried out. | 11-20-2008 |
20110130145 | Transmission Power Control Method and System - 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. | 06-02-2011 |
20110157641 | IMAGE FORMING APPARATUS AND IMAGE FORMING SYSTEM - 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. | 06-30-2011 |
20110194128 | IMAGE FORMING APPARATUS AND COUNTING METHOD FOR IMAGE FORMING APPARATUS - 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. | 08-11-2011 |
20120307302 | IMAGE FORMING APPARATUS, IMAGE FORMING SYSTEM AND COMPUTER READABLE RECORDING MEDIUM STORING CONTROL PROGRAM FOR THE IMAGE FORMING APPARATUS - 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. | 12-06-2012 |
Hiroshi Furukawa, Kanagawa JP
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20110292091 | DISPLAY UNIT - 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. | 12-01-2011 |
Hiroshi Furukawa, Saitama JP
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20130256968 | IMAGE FORMING APPARATUS, IMAGE PROCESSING METHOD AND IMAGE FORMING SYSTEM - 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 | 10-03-2013 |
Hiroshi Furukawa, Fukuoka-Shi JP
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20130272345 | PACKET COMMUNICATION SYSTEM, EMISSION CONTROL APPARATUS, ANTENNA CONTROL METHOD AND COMPUTER PROGRAM - 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. The emission control unit controls the overall directionality of a directional antenna unit based on a bit sequence including at least one bit thus identified. | 10-17-2013 |
Hiroshi Furukawa, Atsugi-Shi JP
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20150036134 | PHYSICAL QUANTITY MEASURING SYSTEM AND PHYSICAL QUANTITY MEASURING METHOD - 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. | 02-05-2015 |
Hiroshi Furukawa, Setagaya JP
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20150355952 | INFORMATION PROCESSING SYSTEM AND PROGRAM MIGRATION METHOD - A first executing unit executes a first program by emulating information processing in a first operational environment in which the first program is executable. A generating unit generates, in parallel with the execution of the first program, a second program which is executable in a second operational environment of an information processing system and which is capable of acquiring the same processing result as the first program. A second executing unit terminates the execution of the first program by the first executing unit and also executing the second program, after the generation of the second program is completed. | 12-10-2015 |