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    WIRELESS COMMUNICATION SYSTEM, BASE STATION CONTROL DEVICE, EVACUATION GUIDANCE METHOD, AND BASE STATION CONTROL PROGRAM
    1.
    发明申请
    WIRELESS COMMUNICATION SYSTEM, BASE STATION CONTROL DEVICE, EVACUATION GUIDANCE METHOD, AND BASE STATION CONTROL PROGRAM 有权

    公开(公告)号：US20230136032A1

    公开(公告)日：2023-05-04

    申请号：US17915889

    申请日：2020-04-02

    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    Inventor： Ryota SHIINA ,  Tomohiro TANIGUCHI ,  Kazutaka HARA ,  Shinya TAMAKI ,  Tomoki MURAKAMI ,  Toshiro NAKAHIRA

    IPC: H04B10/11 ,  H04W76/10

    Abstract: An object of the present disclosure is to make already installed smart lightings available as optical base stations as they are without modifying them, and perform connection/authentication control for RF communication using an optical signal sent out from the optical base stations.
    The present disclosure is a wireless communication system including: one or more wireless base stations that wirelessly communicate with a terminal; a base station control device that collects wireless base station information from each wireless base station, determines a wireless base station that wirelessly communicates with the terminal using the collected wireless base station information, and transmits an optical ID corresponding to the determined wireless base station; and one or more optical base stations that receive the optical ID from the base station control device, and transmit the received optical ID to the terminal using an optical signal, wherein the wireless base station determined by the base station control device wirelessly communicates with the terminal that receives the optical ID.

    OPTICAL SYSTEM, AND DYNAMIC WAVELENGTH BANDWIDTH ALLOCATION METHOD FOR OPTICAL SYSTEM
    4.
    发明申请
    OPTICAL SYSTEM, AND DYNAMIC WAVELENGTH BANDWIDTH ALLOCATION METHOD FOR OPTICAL SYSTEM 有权
    光学系统和光学系统的动态波长带宽分配方法

    公开(公告)号：US20150326337A1

    公开(公告)日：2015-11-12

    申请号：US14655310

    申请日：2013-12-06

    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    Inventor： Tomoaki YOSHIDA ,  Shinya TAMAKI ,  Shin KANEKO

    IPC: H04J14/02 ,  H04Q11/00

    CPC classification number: H04J14/0247 ,  H04J14/0252 ,  H04L12/44 ,  H04L12/6418 ,  H04Q11/0067 ,  H04Q2011/0016 ,  H04Q2011/0064 ,  H04Q2011/0086

    Abstract: When dynamic wavelength bandwidth allocation using a fixed cycle such as a multiple request method is realized in wavelength tunable WDM/TDM-PON, there is required a wavelength switching method that can suppress a transmission delay of an uplink signal and an increase in burst characteristics, that is, suppress an increase in an allocation cycle to a minimum.An ONU requests a bandwidth of an uplink signal, and in accordance with this, an OLT calculates a time when the OLT transmits the uplink signal and a transmission duration time and performs an instruction, and a DBA cycle in which the ONU transmits the uplink signal in accordance with the instruction and a dynamic wavelength allocation cycle in which the OLT instructs wavelength switching, and the ONU switches the wavelength and belongs to a different LC are separated. While the ONU switches the wavelength, the DBA cycles can be performed plural times in the ONU whose wavelength is not switched, the switching of the wavelength is confirmed after the wavelength has been switched, and then DBA operation is performed at the switched wavelength.

    Abstract translation: 在波长可调WDM / TDM-PON中实现使用诸如多请求方法等固定周期的动态波长带宽分配时，需要能够抑制上行链路信号的传输延迟和突发特性的增加的波长切换方法， 即将分配周期的增加抑制到最小。 ONU请求上行链路信号的带宽，根据这一点，OLT计算OLT发送上行链路信号的时间和发送持续时间并执行指令，以及ONU发送上行链路信号的DBA周期 根据指令和OLT指示波长切换的动态波长分配周期，并且ONU切换波长并属于不同的LC被分离。 当ONU切换波长时，可以在波长不被切换的ONU中进行多次DBA周期，在切换波长后确认波长切换，然后在切换波长下进行DBA运算。

    WIRELESS COMMUNICATION SYSTEM, BASE STATION CONTROL DEVICE, EVACUATION GUIDANCE METHOD, AND BASE STATION CONTROL PROGRAM
    5.
    发明公开
    WIRELESS COMMUNICATION SYSTEM, BASE STATION CONTROL DEVICE, EVACUATION GUIDANCE METHOD, AND BASE STATION CONTROL PROGRAM 审中-公开

    公开(公告)号：US20240063906A1

    公开(公告)日：2024-02-22

    申请号：US18270394

    申请日：2021-01-04

    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    Inventor： Ryota SHIINA ,  Toshihito FUJIWARA ,  Shinya TAMAKI ,  Tomohiro TANIGUCHI

    IPC: H04B10/112 ,  H04W28/02

    CPC classification number: H04B10/1129 ,  H04W28/0231

    Abstract: An object of the present disclosure is to reduce a system load imbalance between APs and unfairness in communication quality between users subordinate to each AP.
    The present disclosure includes: a plurality of radio base stations that perform wireless communication with terminals; a plurality of optical base stations that are arranged in a communication area of at least one of the plurality of radio base stations and transmit, to a terminal by using an optical signal, an optical ID indicating connection information and authentication information for communicating with an available radio base station among the plurality of radio base stations; and a base station control device that collects, from individual radio base stations, communication quality information of the terminals, determines a deviation in the communication quality of the terminals between the plurality of radio base stations, and when the deviation occurs in the communication quality of the terminals between the plurality of radio base stations, causes fewer optical base stations to transmit the optical ID for communicating with the radio base station having the deviation.

    POSITION ESTIMATION SYSTEM, CONTROLLER, POSITION ESTIMATION METHOD, AND PROGRAM
    8.
    发明申请
    POSITION ESTIMATION SYSTEM, CONTROLLER, POSITION ESTIMATION METHOD, AND PROGRAM 有权

    公开(公告)号：US20250089006A1

    公开(公告)日：2025-03-13

    申请号：US18721463

    申请日：2021-12-21

    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    Inventor： Ryota SHIINA ,  Tomohiro TANIGUCHI ,  Shinya TAMAKI

    IPC: H04W64/00 ,  H04W4/38

    Abstract: An object of the present invention is to provide a position estimation system, a control device, a position estimation method, and a program which are capable of estimating a position of a sensor using existing lighting as it is. The position estimation system according to the present invention makes use of the fact that, when a pattern is sent from each light source at a separate frequency, the peak intensities thereof differ in accordance with a position of a sensor if the spectrum of the received signal light is plotted. That is to say, this position estimation system estimates the position of the sensor by comparing the peak intensity ratio of the spectrum when the light pattern from each light source is received and the theoretical peak intensity ratio which serves as a reference prepared in advance.

    MONITORING SYSTEM, MONITORING METHOD, AND MONITORING PROGRAM
    10.
    发明公开
    MONITORING SYSTEM, MONITORING METHOD, AND MONITORING PROGRAM 审中-公开

    公开(公告)号：US20230215254A1

    公开(公告)日：2023-07-06

    申请号：US17927500

    申请日：2020-05-27

    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    Inventor： Ryota SHIINA ,  Tomohiro TANIGUCHI ,  Shinya TAMAKI ,  Kazutaka HARA ,  Koji TSUJI ,  Tetsuya SUZUKI ,  Yasutaka KIMURA

    IPC: G08B13/196 ,  G06V20/52

    CPC classification number: G08B13/196 ,  G06V20/52

    Abstract: The present disclosure provides a monitoring system including an edge processing apparatus including a space distinct ID management database, a space distinct ID control unit, a storage unit, an analysis unit, and an abnormality determination unit, and a controller, a transmitter, and a camera with sensor that are installed in a location to be monitored, in which the space distinct ID management database stores a space distinct ID and a transmission time of the space distinct ID in association with the location to be monitored, the space distinct ID control unit acquires the space distinct ID associated with the location to be monitored from the space distinct ID management database and transmits the space distinct ID that is acquired to the controller in the associated location to be monitored, the controller transmits the space distinct ID acquired from the space distinct ID control unit to the transmitter, the transmitter generates a signal based on the space distinct ID acquired from the controller and diffuses, in a space of the location to be monitored, the signal that is generated, the camera with sensor includes a sensor that captures an image of the location to be monitored where the camera with sensor is installed and receives the signal diffused by the transmitter, and the camera with sensor transmits a received signal received by the sensor to the storage unit, the storage unit stores the received signal received from the camera with sensor in association with the location to be monitored where the camera with sensor is installed, the analysis unit extracts a space distinct ID from the received signal stored in the storage unit and transmits the space distinct ID that is extracted to the abnormality determination unit in association with the location to be monitored, and the abnormality determination unit compares and determines whether there is a match between the space distinct ID associated with the location to be monitored from the analysis unit and current time, and the space distinct ID and the transmission time of the space distinct ID associated with the location to be monitored that are stored in the space distinct ID management database.

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