Patents Assigned to National Institute of Information and Communications Technology
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Patent number: 9245749Abstract: A method of forming a Ga2O3-based crystal film includes epitaxially growing a Ga2O3-based crystal film on a (001)-oriented principal surface of a Ga2O3-based substrate at a growth temperature of not less than 750° C. A crystal multilayer structure includes a Ga2O3-based substrate with a (001)-oriented principal surface, and a Ga2O3-based crystal film formed on the principal surface of the Ga2O3-based substrate by epitaxial growth. The principal surface has a flatness of not more than 1 nm in an RMS value.Type: GrantFiled: December 23, 2014Date of Patent: January 26, 2016Assignees: TAMURA CORPORATION, NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGYInventors: Kohei Sasaki, Masataka Higashiwaki
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Patent number: 9231638Abstract: A high-speed communication control system is provided to resolve the problem of transmission delay, while a communication capacity is ensured. A communication system includes a transmission station 13 and a reception station 15. A communication system 17 includes an optical fiber line 19 and a wireless path 21 that connect the transmission station 13 to the reception station 15 so that information is transmitted and received. The transmission station 13 includes a communication control unit 11 that controls a communication path. The reception station 15 is able to communicate with the transmission station 13. The communication control unit 11 controls whether the information is transmitted to the reception station 15 via one of the optical fiber line 19 and the wireless path 21.Type: GrantFiled: September 24, 2013Date of Patent: January 5, 2016Assignee: National Institute Of Information And Communications TechnologyInventors: Tetsuya Kawanishi, Atsushi Kanno
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WIRELESS TRANSMITTER, WIRELESS RECEIVER, WIRELESS TRANSMISSION METHOD, AND WIRELESS RECEPTION METHOD
Publication number: 20150341201Abstract: In order to suppress out-of-band radiation within a range of a spectrum mask regulation without reducing transmission signal power or the like even when a wireless communication is performed in a white space by using OFDM or the like, the present invention is characterized by including an RF circuit characteristic analysis unit, a multipath delay detection unit, a digital filter setting unit, and a transmission power setting unit and further including: a windowing function/windowing duration selection unit configured to select a windowing function and a windowing duration based on the analysis result by the RF circuit characteristic analysis unit, the detection result by the multipath delay detection unit, and the setting by the digital filter setting unit and the transmission power setting unit; a guard interval duration selection unit configured to select a guard interval duration; and a transmission power selection unit configured to select transmission power.Type: ApplicationFiled: October 31, 2013Publication date: November 26, 2015Applicant: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGYInventors: Ryuhei FUNADA, Keiichi MIZUTANI, Hiroshi HARADA -
Publication number: 20150319001Abstract: There is provided a method for transmitting and receiving data capable of effectively suppressing the consumption of power.Type: ApplicationFiled: October 21, 2013Publication date: November 5, 2015Applicant: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGYInventors: Fumihide KOJIMA, Hiroshi HARADA
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Publication number: 20150319607Abstract: A method for transmitting and receiving data between a plurality of nodes, each performing a periodical standby operation at a specific interval, includes: a step of detecting another communicable node performed by one node; a step of consecutively transmitting notice information representing data transmission timing to another node for a plurality of number of times at a predetermined interval by using the one node; a step of performing a standby operation for data according to the data transmission timing represented in the notice information performed by the another node receiving the notice information within the periodical standby operation; a step of transmitting the notice information to the another node according to the data transmission timing performed by the one node; and a step of receiving the transmission data transmitted from the one node according to the notified data transmission timing performed by the another node.Type: ApplicationFiled: October 21, 2013Publication date: November 5, 2015Applicant: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGYInventors: Fumihide KOJIMA, Hiroshi HARADA
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Publication number: 20150289250Abstract: A first position and second position at first point in time and second point in time are specified, information on planned moving route starting from the first position is stored, an option list having options in different viewpoints are stored regarding frequency selection policies in selecting frequency to be used, the route information and the option list are transmitted to database, an information list on effective frequencies listed corresponding to respective points in the route information and the options is received from the database, it is determined to which point out of the points the second position is close, appropriate option is selected from the option list as policy to be applied, frequency listed in correspondence to the point close to the second position out of the points and the policy to be applied is selected from the effective frequency information list.Type: ApplicationFiled: November 16, 2012Publication date: October 8, 2015Applicant: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGYInventors: Kentaro Ishizu, Hiroshi Harada
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Patent number: 9146357Abstract: A cartridge-type optical functional module achieves excellent optical coupling and may include an optical fiber-type module and/or a waveguide-type module. A cartridge-type optical functional module is provided that includes first and second optical fiber collimators, an optical functional object that has an optical fiber-type module or a waveguide-type module, and a base section. The optical functional object also includes a third collimator, and a first alignment mechanism for aligning the position of the third collimator in the optical functional object.Type: GrantFiled: July 19, 2012Date of Patent: September 29, 2015Assignees: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY, OPTOQUEST CO., LTD.Inventors: Naoya Wada, Tetsuya Kobayashi, Yusaku Tottori
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Publication number: 20150271522Abstract: Provided is a method for reducing data size of images containing mutually similar information. The present method includes the steps of: generating a synthesized image corresponding to a target image based on a first reference image and a second reference image; generating a mask image indicating a potential error of the synthesized image with respect to the target image from the first reference image and the second reference image; generating a residual image in accordance with a difference between the target image and the synthesized image; generating a converted image corresponding to the target image by assigning, based on the mask image, a region where the potential error is relatively large, information on a corresponding region of the residual image; and outputting the first reference image, the second reference image and the converted image as information representing the target image, the first reference image and the second reference image.Type: ApplicationFiled: October 9, 2013Publication date: September 24, 2015Applicant: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGYInventors: Mehrdad Panahpour Tehrani, Akio Ishikawa, Masahiro Kawakita, Naomi Inoue, Toshiaki Fujii
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Publication number: 20150256819Abstract: Provided is a method including: generating a synthesized image corresponding to a target image based on a first reference image and a second reference image; generating side information which is information on a virtual view at a location of the target image, based on at least one of the target image and the synthesized image; generating a gradient image based on the side information; determining a factor in accordance with a gradient for each pixel location of the gradient image, and performing a modulo operation using, as a modulus, a factor corresponding to an intensity value at each pixel location of the target image, to generate a remainder image composed of remainders of respective pixel locations calculated by the modulo operation; and outputting the first reference image, the second reference image and the remainder image as information representing the target image, the first reference image and the second reference image.Type: ApplicationFiled: October 9, 2013Publication date: September 10, 2015Applicant: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGYInventors: Mehrdad Panahpour Tehrani, Akio Ishikawa, Masahiro Kawakita, Naomi Inoue, Toshiaki Fujii
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Patent number: 9129891Abstract: A semiconductor device includes a first semiconductor layer provided over a substrate; an electron transit layer contacting a top of the first semiconductor layer; and a second semiconductor layer contacting a top of the electron transit layer, wherein the electron transit layer has a dual quantum well layer having a structure where a first well layer, an intermediate barrier layer, and a second well layer are sequentially stacked, an energy of a conduction band of the intermediate barrier layer is lower than an energy of conduction band of the first semiconductor layer and the second semiconductor layer, and a ground level is generated in the first and second well layers, and a first excitation level is generated in the dual quantum well layer.Type: GrantFiled: September 25, 2012Date of Patent: September 8, 2015Assignees: FUJITSU LIMITED, NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGYInventors: Akira Endoh, Issei Watanabe
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Publication number: 20150230097Abstract: Provided is a management device maintaining communication qualities while accommodating a changeable communication environment. Based on correspondence between each geographical position of plural managed devices and available frequencies thereat, pair available frequencies available in common by arbitrary two managed devices are specified for each pair, and notified to the arbitrary two devices. From managed devices, acquiring pair communication qualities obtained when the pair available frequencies is used, defined is a best pair available frequency capable of obtaining a best pair communication quality. Specifying all of candidate paths connecting the each pair, relaying other managed devices, calculated are, based on the best pair communication quality, path communication qualities in the candidate paths connecting the each pair using the best pair available frequency.Type: ApplicationFiled: November 28, 2012Publication date: August 13, 2015Applicant: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGYInventors: Kentaro Ishizu, Hiroshi Harada
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Publication number: 20150208348Abstract: A data transmitting/receiving method capable of effectively suppressing power consumption includes: establishing synchronization between a master device and a slave device; receiving a data frame; extracting payloads from the received data frame; generating a new payload section by combining the extracted payloads with another payload extracted from another data frame received from another device or a new payload generated by the device; generating a new synchronization section and a new header section; generating a new data frame by combining the new synchronization section and the new header section that are generated with the new payload section; and transmitting the generated new data frame.Type: ApplicationFiled: September 21, 2012Publication date: July 23, 2015Applicant: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGYInventors: Fumihide Kojima, Hiroshi Harada
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Patent number: 9077753Abstract: The invention provides a new system for internet security. The internet network system comprises a first Edge Network 11 that comprises a Source Host (SH) 12, a first gateway (GW) 13 and a Local Name Server (LNS) 14, a Logical Control network 21 which comprises a Domain Name Registry (DNR) 22 and a Host Name Registry (HNR) 23, a Target Host (TH) 31 in the first Edge Network 11 or in a second Edge Network 32 and a Global Transit Network 41 which includes Routers 42 to connect the first Edge Network 11, the Logical Control network 21; and the second Edge Network 32.Type: GrantFiled: January 26, 2012Date of Patent: July 7, 2015Assignee: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGYInventors: Ved Kafle, Tomoji Tomuro, Hiroaki Harai
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Patent number: 9071776Abstract: In order to generate a two-dimensional image of a sample in a short time using THz waves, provided is a reflective imaging device including a sample holder, a THz wave light source, a THz wave camera, a rotation mechanism for rotating the holder and the camera, and a processing unit. A sample unit includes an incidence member, a sample, and a reflection member. The sample includes a first region of only a membrane and a second region including a biopolymer. The camera detects, with regard to respective incident angles, a THz wave in which interference occurs between a component reflected at an interface between the incidence member and the sample and a component reflected at an interface between the sample and the reflection member, of each portion of the sample unit, and outputs a signal.Type: GrantFiled: May 20, 2011Date of Patent: June 30, 2015Assignees: NEC CORPORATION, NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGYInventors: Naoki Oda, Yuichi Ogawa, Iwao Hosako, Norihiko Sekine
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Publication number: 20150173055Abstract: A use frequency is advantageously selected even when moving. Region information indicating a planned moving range is retained and transmitted to a database, an available frequency information list indicating frequencies usable in common in an entire of the planned moving range is received from the database, and a use frequency is selected from the list.Type: ApplicationFiled: November 30, 2012Publication date: June 18, 2015Applicant: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGYInventors: Kentaro Ishizu, Hiroshi Harada
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Patent number: 9055444Abstract: Where two or more wireless communication networks having mutually different physical layers coexist, and wireless communication is performed between a plurality of devices and a coordinator in each one of the wireless communication networks, the coordinator of one wireless communication network generates coexistence notification frame data to notify coordinators of the other wireless communication networks of existence of the coordinator. This first coordinator encodes the generated coexistence notification frame data, inserts source data so as to be set as FEC data, modulates the FEC data through a Gaussian frequency shifting keying system (GFSK) so as to be set as a GFSK modulated wave signal, and transmits the GFSK modulated wave signal to the coordinators of the other wireless communication networks.Type: GrantFiled: December 15, 2010Date of Patent: June 9, 2015Assignee: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGYInventors: Chin-Sean Sum, Hiroshi Harada, Fumihide Kojima, Ryuhei Funada
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Patent number: 9049648Abstract: Object: To provide a mechanism and a function of a system that can determine a communication method and the like effectively utilizing frequency resources, considering priority of each communication, in a cognitive communication network system of a frequency shared type or the like assuming that a given frequency band is shared by a plurality of systems in use.Type: GrantFiled: September 24, 2010Date of Patent: June 2, 2015Assignee: National Institute of Information and Communications TechnologyInventors: Kentaro Ishizu, Homare Murakami, Goh Miyamoto, Ha Nguyen Tran, Stanislav Filin, Chen Sun, Yohannes Alemseged Demessie, Hiroshi Harada
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Patent number: 9037586Abstract: Conventionally, it has been impossible to appropriately acquire word pairs having a prescribed relationship. Such word pairs can be appropriately acquired with a word pair acquisition apparatus including: a word class information storage unit in which word class information can be stored; a class pair favorableness degree storage unit in which a class pair favorableness can be stored; a seed pattern storage unit in which can be stored one or more seed patterns; a word pair acquisition unit that acquires one or more word pairs co-occurring with the seed pattern from sentence groups; a class pair favorableness degree acquisition unit that acquires a class pair favorableness degree; a score determination unit that uses the class pair favorableness degree to determine a score of each of the word pairs; and a word pair selection unit that acquires one or more word pairs having a high score.Type: GrantFiled: September 7, 2010Date of Patent: May 19, 2015Assignee: National Institute of Information and Communications TechnologyInventors: Stijn De Saeger, Kentaro Torisawa, Junichi Kazama, Kow Kuroda, Masaki Murata
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Patent number: 9019591Abstract: It is an object of the present invention to provide a rare earth doped fiber whose transient response is suppressed and an optical amplifier for optical packet communication having a good characteristic even if there is little traffic. The above-mentioned problem is solved by an optical amplifier for optical packet communication comprising a first rare earth doped fiber (EDFA) having an active region whose diameter is between 3.4 ?m and 10 ?m, inclusive, an intermediate gain equalizing filter, and a second EDF, wherein the first EDFA is shorter than the second EDFA, and wherein the intermediate gain equalizing filter adjusts the intensity of each wavelength channel so as to equalize the light intensity of each wavelength channel having transmitted through the second EDF.Type: GrantFiled: March 12, 2008Date of Patent: April 28, 2015Assignees: National Institute of Information and communications Technology, Amonics LimitedInventors: Yoshinari Awaji, Hideaki Furukawa, Naoya Wada, Ray Man, Peter Chan, Eddie Kong
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Patent number: 8985774Abstract: A floating image interaction device includes an imaging optical system projecting a floating real image of an object and an user object detecting means for obtaining information about the user accessing the floating real image; means to realize interactive response by the real image or by haptic feedback to actions by the user; and related computer programs.Type: GrantFiled: March 31, 2008Date of Patent: March 24, 2015Assignee: National Institute of Information and Communication TechnologyInventor: Satoshi Maekawa