公开(公告)号：US20240014889A1

公开(公告)日：2024-01-11

申请号：US18261729

申请日：2022-01-12

Applicant: SoftBank Corp.

Inventor： Takafumi Fujii ,  Teruya Fujii

IPC: H04B7/185

CPC classification number: H04B7/18513

Abstract: It is prevented of degradation of communication quality caused by estimation errors of plural path differences between plural antennas for feeder link (FL antennas) incorporated in an aerial-staying type communication relay apparatus and plural gateway (GW) stations. The aerial-staying type communication relay apparatus estimates plural first path differences Δdji respectively between the plural GW stations and the plural FL antennas with reference to a main path, based on plural pilot reception signals received from the plural GW stations, obtains plural correction values corresponding to the plural first path differences, based on the plural pilot reception signals, estimates a propagation path response in the transmission signal band of the feeder link, based on plural corrected second path differences Δdji_new obtained by respectively correcting the plural first path differences with plural correction values, calculates and stores reception weights for suppressing interference signals, and applies the plural reception weights to reception signals received via the plural antennas for feeder link, with respect to each of the plural gateway stations.

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

IPC: H04B7/185 ,  H04B7/0456 ,  H04B7/06

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.

公开(公告)号：US20240333038A1

公开(公告)日：2024-10-03

申请号：US18706413

申请日：2022-10-21

Applicant: SoftBank Corp.

Inventor： Yuta Nakamoto ,  Naoki Hasegawa ,  HoYu Lin ,  Takafumi Fujii ,  Sachiko Takeuchi ,  Yoshichika Ota

IPC: H02J50/20 ,  H01Q3/36 ,  H02J50/40 ,  H02J50/80 ,  H02J50/90 ,  H04B7/0408 ,  H04B7/0452 ,  H04B7/06

CPC classification number: H02J50/20 ,  H02J50/402 ,  H02J50/80 ,  H02J50/90 ,  H04B7/0408 ,  H04B7/0452 ,  H04B7/0617 ,  H01Q3/36

Abstract: Provided is a wireless-power transfer apparatus capable of efficiently supplying a predetermined power for each of plural terminal apparatuses. A wireless-power transfer apparatus comprises a radio processing section for transmitting a signal for wireless power transfer to each of the plural terminal apparatuses via plural beams, by a beamforming for forming the plural beams against the plural terminal apparatuses simultaneously or at staggered times, an information acquisition section for acquiring terminal information including location information of a current location of a terminal apparatus for each of plural terminal apparatuses, and a control section for controlling the beamforming so that a signal for wireless power transfer is received at a predetermined reception power in each of plural terminal apparatuses, based on terminal information of each of plural terminal apparatuses.

公开(公告)号：US12107436B1

公开(公告)日：2024-10-01

申请号：US18706413

申请日：2022-10-21

Applicant: SoftBank Corp.

Inventor： Yuta Nakamoto ,  Naoki Hasegawa ,  HoYu Lin ,  Takafumi Fujii ,  Sachiko Takeuchi ,  Yoshichika Ota

IPC: H02J50/40 ,  H02J50/20 ,  H02J50/80 ,  H02J50/90 ,  H04B7/0408 ,  H04B7/0452 ,  H04B7/06 ,  H01Q3/36

CPC classification number: H02J50/20 ,  H02J50/402 ,  H02J50/80 ,  H02J50/90 ,  H04B7/0408 ,  H04B7/0452 ,  H04B7/0617 ,  H01Q3/36

Abstract: Provided is a wireless-power transfer apparatus capable of efficiently supplying a predetermined power for each of plural terminal apparatuses. A wireless-power transfer apparatus comprises a radio processing section for transmitting a signal for wireless power transfer to each of the plural terminal apparatuses via plural beams, by a beamforming for forming the plural beams against the plural terminal apparatuses simultaneously or at staggered times, an information acquisition section for acquiring terminal information including location information of a current location of a terminal apparatus for each of plural terminal apparatuses, and a control section for controlling the beamforming so that a signal for wireless power transfer is received at a predetermined reception power in each of plural terminal apparatuses, based on terminal information of each of plural terminal apparatuses.

公开(公告)号：US11973573B2

公开(公告)日：2024-04-30

申请号：US18261729

申请日：2022-01-12

Applicant: SoftBank Corp.

Inventor： Takafumi Fujii ,  Teruya Fujii

IPC: H04B7/185

CPC classification number: H04B7/18513

Abstract: It is prevented of degradation of communication quality caused by estimation errors of plural path differences between plural antennas for feeder link (FL antennas) incorporated in an aerial-staying type communication relay apparatus and plural gateway (GW) stations. The aerial-staying type communication relay apparatus estimates plural first path differences Δdji respectively between the plural GW stations and the plural FL antennas with reference to a main path, based on plural pilot reception signals received from the plural GW stations, obtains plural correction values corresponding to the plural first path differences, based on the plural pilot reception signals, estimates a propagation path response in the transmission signal band of the feeder link, based on plural corrected second path differences Δdji_new obtained by respectively correcting the plural first path differences with plural correction values, calculates and stores reception weights for suppressing interference signals, and applies the plural reception weights to reception signals received via the plural antennas for feeder link, with respect to each of the plural gateway stations.

公开(公告)号：US11308814B2

公开(公告)日：2022-04-19

申请号：US16966254

申请日：2019-01-22

Applicant: SoftBank Corp.

Inventor： Takafumi Fujii ,  Yoshichika Ota ,  Kenji Hoshino

IPC: G08G5/00 ,  H04B7/155

Abstract: A system and a method for suppressing a deterioration of communication quality due to frequent occurrence of handovers at cell boundaries of a plurality of cells formed by a plurality of radio relay apparatuses that can move in an upper airspace, are provided. In the system, each of the plurality of radio relay apparatuses for performing a radio communication with a terminal apparatus comprises a radio relay station which is movably provided by flying in an upper airspace, forms a cell toward the ground or the sea, and performs a radio communication with a terminal apparatus located in the cell. Each of the plurality of radio relay apparatuses flies in cooperation with each other so as to maintain a positional relationship between the radio relay apparatuses by an autonomous control or external control.

公开(公告)号：US20200380874A1

公开(公告)日：2020-12-03

申请号：US16966254

申请日：2019-01-22

Applicant: SoftBank Corp.

Inventor： Takafumi Fujii ,  Yoshichika Ota ,  Kenji Hoshino

IPC: G08G5/00 ,  H04B7/155

Abstract: A system and a method for suppressing a deterioration of communication quality due to frequent occurrence of handovers at cell boundaries of a plurality of cells formed by a plurality of radio relay apparatuses that can move in an upper airspace, are provided. In the system, each of the plurality of radio relay apparatuses for performing a radio communication with a terminal apparatus comprises a radio relay station which is movably provided by flying in an upper airspace, forms a cell toward the ground or the sea, and performs a radio communication with a terminal apparatus located in the cell. Each of the plurality of radio relay apparatuses flies in cooperation with each other so as to maintain a positional relationship between the radio relay apparatuses by an autonomous control or external control.