Suppression of reflected wave interference from antenna-mounting plate in service link of haps

    公开(公告)号:US12278422B2

    公开(公告)日:2025-04-15

    申请号:US18012706

    申请日:2021-06-29

    Applicant: SoftBank Corp.

    Abstract: Provided is an aerial-staying type communication relay apparatus that can suppress fluctuations in a directivity pattern due to reflection at an antenna-mounting member to which a service link antenna is mounted, stably fix a footprint of a cell, and as a result, prevent deterioration of communication quality. The communication relay apparatus includes an antenna having plural antenna elements that form a cell for performing a radio communication of a service link to and from the terminal apparatus and an antenna-mounting member to which the antenna is mounted, and a layer of radio wave absorber or a layer of frequency-selective electromagnetic shielding member that selectively shields radio waves having a frequency of the service link, which is provided on an outer surface exposed to an outside of the antenna-mounting member. Phases and amplitudes of signals transmitted and received via each of the plural antenna elements of the antenna may be controlled.

    Information processing device, program, information processing system, and information processing method

    公开(公告)号:US12244394B2

    公开(公告)日:2025-03-04

    申请号:US18642728

    申请日:2024-04-22

    Applicant: SoftBank Corp.

    Inventor: Naoki Maekawa

    Abstract: An information processing device is provided comprising a situation-related information reception unit that receives, for a flight vehicle that functions as a stratospheric platform and forms a wireless communication area by radiating an SL beam from an SL antenna to provide wireless communication service to user terminals within the wireless communication area, situation-related information related to a sky situation above a ground area where the wireless communication service is provided and a deployment determination unit that determines deployment of a mobile object to an area, among the ground area, in which a sky situation meets a predetermined situation condition, based on the situation-related information, in order to establish a feeder link between a gateway mounted on the mobile object and the flight vehicle.

    CONTROL DEVICE, COMPENSATION DEVICE, PROGRAM, AND CONTROL METHOD

    公开(公告)号:US20250015894A1

    公开(公告)日:2025-01-09

    申请号:US18893993

    申请日:2024-09-24

    Inventor: Shiro RYU

    Abstract: A control device which controls an operation of a compensation device which compensates for birefringence and/or polarization mode dispersion, which is received by signal light having propagated through an optical transmission line, by digital signal processing using a finite impulse response filter includes: a detection signal reception unit which receives a detection signal which is a signal indicating a detection result of a detection device which optically detects polarization fluctuation in the optical transmission line; and a setting unit which decides a setting regarding an update frequency or an update interval of the number of taps of the finite impulse response filter or an update frequency or an update interval of a tap coefficient of the finite impulse response filter, based on the detection result of the detection device.

    Mobile object, computer-readable medium, and control method

    公开(公告)号:US12136955B2

    公开(公告)日:2024-11-05

    申请号:US17684428

    申请日:2022-03-02

    Applicant: SoftBank Corp.

    Inventor: Hiromichi Imai

    Abstract: Provided is a mobile object including: a mobile object information transmitting unit configured to transmit, to another mobile object by optical wireless communication by a first optical wireless communication unit, first mobile object information including first inertial measurement information and first body control information; a mobile object information receiving unit configured to receive, from the another mobile object by optical wireless communication by the first optical wireless communication unit, second mobile object information including second inertial measurement information and second body control information; and an optical axis direction control unit configured to control a direction of an optical axis of the first optical wireless communication unit on a basis of the first mobile object information and the second mobile object information.

    MITIGATION OF DEGRADATION OF INTERFERENCE-REDUCTION PERFORMANCE IN PROCESSING DELAY WHEN SWITCHING ANTENNAS IN HAPS MULTI-FEEDER LINKS

    公开(公告)号:US20240305360A1

    公开(公告)日:2024-09-12

    申请号:US18016463

    申请日:2021-07-07

    Applicant: SoftBank Corp.

    Inventor: Takafumi Fujii

    CPC classification number: H04B7/18504 H04B7/0456 H04B7/0617 H04B7/06952

    Abstract: It is to mitigate a deterioration of an interference reduction performance between multi-feeder links due to a weight-calculation processing delay, when a combination of plural antennas for feeder link (FL antenna) incorporated in an aerial-staying type communication relay apparatus and plural gateway (GW) stations changes. With respect to each of plural combination patterns in which combinations of plural FL antennas of relay communication station and the plural GW stations are different from each other, a system calculates and stores a weight corresponding to each of the plural GW stations, selects a calculation result of the weight of the combination pattern corresponding to the changed combination, when the combination of the plural FL antennas and the plural GW stations changes due to at least one of a rotation and movement of the communication relay apparatus, and suppresses an interference between the feeder links when transmitting and receiving signals between the relay communication station and the plural GW stations based on the selected calculation result of the weight of the combination pattern.

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