Patents by Inventor Rintaro Katayama

Rintaro Katayama 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).

  • Patent number: 10996076
    Abstract: A management server 103 holds a parameter of a sensor device 101 and change management information related to a change in the parameter, and transmits the changed parameter and the change management information to the sensor device. The sensor device 101 holds the parameter and the change management information transmitted from the management server, and transmits the change management information to the management server together with measurement data. The management server collates the received change management information and preliminarily-held change management information to determine the change in the parameter on the basis of a result of the collation.
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: May 4, 2021
    Assignee: HITACHI, LTD.
    Inventors: Rintaro Katayama, Kenichi Mizugaki, Ryosuke Fujiwara
  • Patent number: 10923793
    Abstract: An object of the present invention is to improve an antenna for IoT services intended for things that constitute an internal space. There is provided an antenna device including an antenna and a dielectric body. In an internal space which is constituted by plural faces including a first face which is an electrically conductive body, the antenna device is adapted to have a shape to be fit inside a hole in the first face. The antenna device is installed, not protruding from the hole to an outer space. The antenna and the dielectric body are placed in series between the internal space and the outer space.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: February 16, 2021
    Assignee: HITACHI, LTD.
    Inventors: Masami Oonishi, Kenichi Mizugaki, Ryosuke Fujiwara, Rintaro Katayama
  • Publication number: 20210013616
    Abstract: An antenna device includes a conductive manhole cover for partitioning an internal space of a manhole and an external space, a wireless device installed in the internal space, and a base station that is installed in the external space and transfers a radio wave with respect to the wireless device. When a notch portion is formed on the edge of the manhole cover and the manhole cover is attached to an opening of the manhole, a slot-shaped void is formed. By using this void as a slot antenna, radio waves from the wireless device can be re-emitted to the external space. With such a configuration, it is not necessary to specially prepare a slot antenna, and a low-cost antenna device can be realized.
    Type: Application
    Filed: June 23, 2020
    Publication date: January 14, 2021
    Inventors: Masami OONISHI, Kenichi MIZUGAKI, Rintaro KATAYAMA, Ryosuke FUJIWARA
  • Publication number: 20200272516
    Abstract: A processor 204 of a sensor device performs measurement processing by one or a plurality of sensors 203 and transmission processing of sensor data generated by the measurement processing. The sensor device includes a processing routine table 211 that stores a processing routine configured to include, corresponding to an identifier for identifying processing performed by a processor, a type of the processing, an execution trigger of the processing, and trigger information that prescribes a trigger for transmitting the sensor data. The processor controls processing in a processing routine of the processing routine table, based on trigger information, so that the sensor data subjected to measurement processing is immediately transmitted, or temporarily stored in a buffer 212 and transmitted after a predetermined time.
    Type: Application
    Filed: February 13, 2020
    Publication date: August 27, 2020
    Inventors: Rintaro KATAYAMA, Ryosuke FUJIWARA, Kenichi MIZUGAKI
  • Publication number: 20190368893
    Abstract: A management server 103 holds a parameter of a sensor device 101 and change management information related to a change in the parameter, and transmits the changed parameter and the change management information to the sensor device. The sensor device 101 holds the parameter and the change management information transmitted from the management server, and transmits the change management information to the management server together with measurement data. The management server collates the received change management information and preliminarily-held change management information to determine the change in the parameter on the basis of a result of the collation.
    Type: Application
    Filed: May 10, 2019
    Publication date: December 5, 2019
    Inventors: Rintaro KATAYAMA, Kenichi MIZUGAKI, Ryosuke FUJIWARA
  • Publication number: 20190296866
    Abstract: An object of the present invention is to prevent wrong registration due to an operation error and an input error in installation work of a sensor device. A terminal acquires a first identifier which the sensor device has and further, acquires positional information using a positioning device. The terminal transmits the first identifier and the positional information respectively acquired to a management server. The sensor device transmits a second identifier held by itself to the management server. The management server correlates the second identifier and the positional information when the management server judges that the first identifier and the second identifier are located in predetermined relation, registers them in a storage, and the management server notifies the sensor device of a result of the judgment.
    Type: Application
    Filed: February 11, 2019
    Publication date: September 26, 2019
    Inventors: Rintaro Katayama, Kenichi Mizugaki, Ryosuke Fujiwara
  • Publication number: 20190267695
    Abstract: An object of the present invention is to improve an antenna for IoT services intended for things that constitute an internal space. There is provided an antenna device including an antenna and a dielectric body. In an internal space which is constituted by plural faces including a first face which is an electrically conductive body, the antenna device is adapted to have a shape to be fit inside a hole in the first face. The antenna device is installed, not protruding from the hole to an outer space. The antenna and the dielectric body are placed in series between the internal space and the outer space.
    Type: Application
    Filed: February 15, 2019
    Publication date: August 29, 2019
    Inventors: Masami OONISHI, Kenichi MIZUGAKI, Ryosuke FUJIWARA, Rintaro KATAYAMA
  • Patent number: 9629052
    Abstract: A traffic management server is configured to determine a base station at which a handover occurs to a base station having a slower maximum communication speed as an area boundary base station, determine a terminal located within a coverage of the area boundary base station, and instruct a control apparatus included in a mobile network to limit a maximum usable bandwidth of the determined terminal.
    Type: Grant
    Filed: April 22, 2015
    Date of Patent: April 18, 2017
    Assignee: Hitachi, Ltd.
    Inventors: Hideki Okita, Rintaro Katayama, Hiroto Nakagawa
  • Publication number: 20170041817
    Abstract: To estimate communication quality of the wireless section in real-time, it is provided a communication management apparatus that manages traffic of a communication system, comprising a storage unit which stores a program, and a processor which executes the program stored in the storage unit, wherein the communication system includes a wireless base station that communicates with a wireless terminal, and a gateway apparatus connected to the wireless base station, and wherein the communication management apparatus is configured to: obtain a degree of congestion of the wireless base station; obtain a wireless quality of the wireless terminal, between the wireless base station and the wireless terminal; and calculate an estimated communication quality value of the wireless terminal between the gateway apparatus and the wireless terminal, according to the degree of congestion of the wireless base station and the obtained wireless quality of the wireless terminal.
    Type: Application
    Filed: August 5, 2016
    Publication date: February 9, 2017
    Applicant: HITACHI, LTD.
    Inventors: Yusuke SHOMURA, Rintaro KATAYAMA, Ryoichi TANAKA, Tomohiro MATSUDA
  • Publication number: 20160142276
    Abstract: It is provided a communication system comprising: a first monitoring apparatus configured to monitor a control signal related to a connection request between a network and a terminal, and generate a reception log; a second monitoring apparatus configured to monitor a packet inputted/outputted to/from a gateway apparatus configured to transfer user data, sort the packet for each session, identify a type of an application which generates the session, and generate a session log including the type of an application; and a traffic management server configured to acquire the reception log generated by the first monitoring apparatus and the session log generated by the second monitoring apparatus, correlate the reception log with the session log by using an occurrence time of the reception log, an occurrence time of the session log, and an identifier of the terminal, and identify an application related to a session which generated the control signal.
    Type: Application
    Filed: November 10, 2015
    Publication date: May 19, 2016
    Applicant: HITACHI, LTD.
    Inventors: Yusuke SHOMURA, Rintaro KATAYAMA, Seiya KUDOH
  • Publication number: 20160036710
    Abstract: In a traffic management server, base station control corresponding to application information is instructed and it is instructed to control traffic, with respect to a specific application of a specific user, on a core network-side in cooperation with information related to a radio area calculated in a base station management server, whereby quality of experience (QoE) in a mobile terminal of a subscriber is improved.
    Type: Application
    Filed: May 29, 2015
    Publication date: February 4, 2016
    Inventors: Seishi HANAOKA, Yusuke SHOMURA, Rintaro KATAYAMA, Yasuhito MAEJIMA
  • Publication number: 20150334042
    Abstract: Provided is a technique of finely performing congestion determination and congestion control on a cellular communication system employing a C-RAN architecture. An instruction is given to a control device to acquire location information of a terminal in a cell of a C-RAN using a first message between network nodes, acquire a congestion indicator of the cell of the C-RAN using a second message between the network nodes, determine the occurrence of congestion of the cell based on the congestion indicator, identify a terminal staying in a cell in which congestion is occurring based on the location information of the terminal, and limit a maximum usable bandwidth of the specified terminal.
    Type: Application
    Filed: May 15, 2015
    Publication date: November 19, 2015
    Inventors: Rintaro KATAYAMA, Yusuke SHOMURA, Keisuke TAKEUCHI, Hiroto NAKAGAWA
  • Publication number: 20150312827
    Abstract: A traffic management server is configured to determine a base station at which a handover occurs to a base station having a slower maximum communication speed as an area boundary base station, determine a terminal located within a coverage of the area boundary base station, and instruct a control apparatus included in a mobile network to limit a maximum usable bandwidth of the determined terminal.
    Type: Application
    Filed: April 22, 2015
    Publication date: October 29, 2015
    Inventors: Hideki OKITA, Rintaro KATAYAMA, Hiroto NAKAGAWA
  • Patent number: 9161277
    Abstract: Interference applied to neighbor cells during terminal handovers can be reduced in wireless communication systems containing base stations having different cell sizes. A serving cell makes handover judgment criteria easier based on pre-acquired cell size information on its own cell and cell size information of neighbor cells in order to facilitate terminal handovers from a base station with a large cell size to a base station with a small cell size. The serving cell finds evaluation function values based on the propagation state (e.g. reference signal received power) between the terminal and target cell, and the interference and load information exchanged between the base stations, and selects the terminal for handover by comparing the evaluation function value with the handover criteria value. The system selects a target cell having a good effect in lowering interference such as a cell with large reference signal received power acquired from a terminal, to serve as the handover destination.
    Type: Grant
    Filed: February 11, 2011
    Date of Patent: October 13, 2015
    Assignee: HITACHI, LTD.
    Inventors: Tomonori Yamamoto, Satoshi Tamaki, Rintaro Katayama, Hirotake Ishii
  • Patent number: 9113424
    Abstract: When a femto cell base station detects an intense uplink interference, the femto cell base station autonomously extends the femto cell so as to raise a probability that a mobile terminal around the original femto cell may be connected to the femto cell base station. If the mobile terminal connects to the femto cell base station, the uplink interference is reduced and total throughput is improved. Additionally, if a resultant effect of interference reduction is low, the femto cell base station returns the mobile terminal, which is connected to the femto cell base station due to the extension of the femto cell, to the original connection destination. If an evaluative criterion meets a predetermined condition, the femto cell base station restores the extended femto cell to the original size. These actions prevent degradation of performance caused by concentration of the connections of mobile terminals to the femto cell base station.
    Type: Grant
    Filed: August 22, 2014
    Date of Patent: August 18, 2015
    Assignee: Hitachi, Ltd.
    Inventors: Keisuke Takeuchi, Rintaro Katayama
  • Patent number: 9083450
    Abstract: A macro base station includes a communication prohibited period setting unit of setting an uplink communication prohibited period to a user equipment belonging to the base station, and prohibits an uplink communication from the user equipment to a wireless communication base station per se during the uplink communication prohibited period. The user equipments belonging to the wireless communication base station per se and the second base station are divided into plural groups, and the uplink communication prohibited period is set to different time periods for the respective groups. Thereby, a communication characteristic is prohibited from being deteriorated at the second base station by an interference affected with the second base station separately from the first base station by the user equipment communicating with the first base station in the uplink communication.
    Type: Grant
    Filed: January 14, 2013
    Date of Patent: July 14, 2015
    Assignee: Hitachi, Ltd.
    Inventors: Shigenori Hayase, Tsuyoshi Tamaki, Tomonori Yamamoto, Rintaro Katayama
  • Publication number: 20150087324
    Abstract: A base station is provided with a plurality of radio units that communicate with a terminal, and a control device connected to the plurality of radio units. When there is a large number of terminals positioned at a boundary of the communication areas of a first radio unit and a second radio unit among the plurality of radio units, the control device makes a first cell ID of the first radio unit and a second cell ID of the second radio unit being identical.
    Type: Application
    Filed: August 29, 2014
    Publication date: March 26, 2015
    Inventors: Hitoshi ISHIDA, Tomonori YAMAMOTO, Satoshi TAMAKI, Rintaro KATAYAMA, Eriko TAKEDA, Tsuyoshi TAMAKI
  • Patent number: 8964777
    Abstract: In a radio communication system where a base station provides blank time slots to avoid inter-cell interference, a decrease in throughput by an excess or shortage of blank time slots is prevented. This invention relates to a radio system that avoids interference in cooperation between base stations by providing blank time slots by a (first) base station. Other (second) base stations detect the number of served terminals affected by interference from the first base station that sets blank time slots, calculate required blank time slots so that the number of required blank time slots will increase with an increase in the number of terminals located in cell edges, and send a notification of the required blank time slots to the first base station. The first base station determines whether system throughput is anticipated to improve, based on the above notifications, and adjusts the length of blank time slots.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: February 24, 2015
    Assignee: Hitachi, Ltd.
    Inventors: Tomonori Yamamoto, Rintaro Katayama, Shigenori Hayase
  • Publication number: 20140364122
    Abstract: When a femto cell base station detects an intense uplink interference, the femto cell base station autonomously extends the femto cell so as to raise a probability that a mobile terminal around the original femto cell may be connected to the femto cell base station. If the mobile terminal connects to the femto cell base station, the uplink interference is reduced and total throughput is improved. Additionally, if a resultant effect of interference reduction is low, the femto cell base station returns the mobile terminal, which is connected to the femto cell base station due to the extension of the femto cell, to the original connection destination. If an evaluative criterion meets a predetermined condition, the femto cell base station restores the extended femto cell to the original size. These actions prevent degradation of performance caused by concentration of the connections of mobile terminals to the femto cell base station.
    Type: Application
    Filed: August 22, 2014
    Publication date: December 11, 2014
    Applicant: Hitachi, Ltd.
    Inventors: Keisuke TAKEUCHI, Rintaro KATAYAMA
  • Patent number: 8897161
    Abstract: To reduce an uplink interference in a network with a first base station of a large output and a second base station of a small output. Detecting the interference, the second base station urges the first base station to hand over a terminal causing it to the second base station. Multiple base stations and one or more terminals exist in this system, each terminal connects with one base station, and a serving base station is changed according to a communication state of each terminal. If the different second base station other than the first base station to which the terminal connects detects a large interference, the second base station will multicast transmit information for urging handover to the base stations except itself. The base station having received the information specifies a terminal giving the interference to the second base station, and makes it to be handed over thereto.
    Type: Grant
    Filed: July 10, 2012
    Date of Patent: November 25, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Kenzaburo Fujishima, Tsuyoshi Tamaki, Rintaro Katayama, Hitoshi Ishida