公开(公告)号：US10149176B2

公开(公告)日：2018-12-04

申请号：US15114470

申请日：2014-01-18

Applicant: SoftBank Corp.

Inventor： Junichi Miyakawa ,  Teruya Fujii

IPC: H04W24/02 ,  H04B7/185 ,  H04W16/28 ,  H04W16/14 ,  H04W72/04 ,  H04W24/04 ,  H04W84/04 ,  H04W84/06

Abstract: Mobile communication systems and base station control apparatuses are provided, by which a spectral efficiency can be improved while preventing interference between a terrestrial cellular mobile communication system and a satellite mobile communication system, and mobile communication services using mobile station apparatuses can be provided more surely in an emergent condition in which a failure occurs in a part of terrestrial cellular base stations. A same frequency band is used for radio communications between a mobile station apparatus 10 and each of terrestrial cellular base stations 20 and a communication relay apparatus 41 of artificial satellite 40. A radio resource used in the terrestrial cellular base stations 20 and a radio resource used in a satellite base station 30 in a common area where the terrestrial cellular mobile communication system and the satellite mobile communication system are available are allocated so as not to overlap with each other, and the radio resource allocated for the satellite base station is increased in the emergent condition in which a failure occurs in a part of the terrestrial cellular base stations so as to be more than that in a normal condition.

公开(公告)号：US20180316411A1

公开(公告)日：2018-11-01

申请号：US15506722

申请日：2016-12-14

Applicant: SoftBank Corp.

Inventor： Takayuki YOSHIMURA ,  Masahiko NANRI ,  Masanori NOMACHI ,  Takanori TAKII ,  Jumpei TAKAGI

IPC: H04B7/155

CPC classification number: H04B7/10 ,  H04B7/15 ,  H04B17/40 ,  H04W16/26 ,  H04W16/28

Abstract: A relay apparatus is provided which is capable of properly executing beamforming for radio communication from the relay apparatus to a donor base station, while inhibiting occurrence of beam interference in its surrounding area as much as possible. A relay apparatus 20 includes: an amplitude and phase measurement unit 25 that measures an amplitude and phase of radio communication from a donor base station 30 to the relay apparatus 20; a beam adjuster 27 that performs beamforming by adjusting a combination of a plurality of antennas; and a base station judgment unit 29 that judges base stations; wherein the adjustment for the beamforming is made so that a relatively strong beam is directed towards the donor base station 30 and a relatively weak beam is directed towards base stations other than the donor base station 30.

公开(公告)号：US20180279205A1

公开(公告)日：2018-09-27

申请号：US15558485

申请日：2017-05-31

Applicant: SoftBank Corp.

Inventor： Masahiko NANRI ,  Takayuki YOSHIMURA ,  Masanori NOMACHI ,  Takanori TAKII ,  Jumpei TAKAGI

IPC: H04W48/06 ,  H04W48/10 ,  H04W24/04

CPC classification number: H04W48/06 ,  H04W16/26 ,  H04W24/04 ,  H04W40/24 ,  H04W48/02 ,  H04W48/08 ,  H04W48/10 ,  H04W48/12 ,  H04W48/16 ,  H04W84/047 ,  H04W88/08

Abstract: The fairness of radio communication between a donor base station and terminal devices is maintained. A relay apparatus 20 for relaying radio communication between one or more terminal devices 10 and a donor base station 30, wherein when the relay apparatus 20 receives a cell restriction instruction from the donor base station 30 to restrict a quantity of terminals capable of existing in a service area of a cell formed by the donor base station 30, the relay apparatus 20 executes processing for avoiding cell restriction operation on itself and transfers the cell restriction instruction received from the donor base station 30 to the terminal devices 10 existing in a service area of a cell formed by the relay apparatus itself.

公开(公告)号：US09930555B2

公开(公告)日：2018-03-27

申请号：US14911531

申请日：2015-01-21

Applicant: SoftBank Corp.

Inventor： Liang Zhang ,  Takao Okamawari ,  Teruya Fujii

IPC: H04L1/00 ,  H04W24/10 ,  H04W88/02 ,  H04W8/22 ,  H04W24/08

CPC classification number: H04W24/10 ,  H04W8/22 ,  H04W24/08 ,  H04W88/02

Abstract: Methods and systems of measuring communication quality in a communication via a mobile communication network are provided. A connection status of a communication terminal apparatus to a mobile communication network is confirmed when a timing of transmitting a measurement data of the communication terminal apparatus side from the communication terminal apparatus to a server comes. The measurement data is transmitted from the communication apparatus to the server when determining that it is a status capable of transceiving the measurement data, based on the confirmation result of connection status, and the measurement data is not transmitted from the communication terminal apparatus to the server when determining it is not a status capable of transceiving the measurement data. A communication quality in the communication via the mobile communication network is measured based on the measurement data received by the server from the communication terminal apparatus.

公开(公告)号：US09736808B2

公开(公告)日：2017-08-15

申请号：US14953415

申请日：2015-11-29

Applicant: SoftBank Corp.

Inventor： Yoshioki Chika ,  Keith Sutton ,  Ryuji Wakikawa

IPC: H04W64/00 ,  H04W16/26 ,  H04W4/04 ,  H04W36/32 ,  H04W4/02 ,  H04W88/04

CPC classification number: H04W64/003 ,  H04W4/025 ,  H04W4/046 ,  H04W16/26 ,  H04W36/32 ,  H04W88/04

Abstract: A mobile object communication system is configured with the assumption that a base station is fixed. Therefore, signal quality becomes unstable if the base station moves freely. Provided is a control apparatus controlling a relay apparatus that is mounted in a mobile object and relays communication between a base station and a communication terminal, including a mobile object information acquiring section that acquires mobile object information indicating a state of the mobile object and a control section that controls the relay apparatus based on the mobile object information. If the movement speed of the mobile object is judged to be less than a predetermined value, the control section may generate a relay control signal indicating that a relay function of the relay apparatus is to be activated.

公开(公告)号：US20170135107A1

公开(公告)日：2017-05-11

申请号：US15406793

申请日：2017-01-16

Applicant: SoftBank Corp. ,  Thaicom Public Company Limited

Inventor： Junichi MIYAKAWA ,  Yoshihito SHIMAZAKI ,  Akihiko TAJIKA ,  Isara AMATAYAKUL ,  Sakon KITTIVATCHARAPONG

IPC: H04W72/04

CPC classification number: H04W72/0453 ,  H04B7/18515 ,  H04B7/18543 ,  H04W84/06

Abstract: When bandwidth is dynamically allocated for audio communication via satellite communication, newly occurring audio communication can negatively affect the communication quality of the existing audio communication. Provided is a data communication apparatus that communicates via a satellite and includes an allocation control section that allocates in advance, for audio communication via the satellite, a bandwidth that is larger than a bandwidth needed for current audio communication being performed via satellite by at least a predetermined bandwidth. A program causes a computer to function as this data communication apparatus. A satellite communication system includes this data communication apparatus and this satellite.

公开(公告)号：US20170083645A1

公开(公告)日：2017-03-23

申请号：US15046446

申请日：2016-02-18

Applicant: SoftBank Corp.

Inventor： Junichi MIYAKAWA

IPC: G06F17/50 ,  G01C21/04 ,  G05D1/00 ,  G01C21/20 ,  B64C39/02 ,  G07C5/00

CPC classification number: G06F17/5009 ,  B64C39/022 ,  B64C39/024 ,  B64C2201/123 ,  B64C2201/127 ,  B64C2201/148 ,  B64C2201/208 ,  G01C21/20 ,  G05D1/0094 ,  G07C5/008 ,  H04B17/00 ,  H04B17/345

Abstract: To provide a system comprising: an unmanned aerial vehicle; and a free space location database, wherein the unmanned aerial vehicle has: a camera that is capable of 360°-image capturing on a horizontal plane; a positioning apparatus that measures a location of the unmanned aerial vehicle; a direction measuring apparatus that measures a direction of the unmanned aerial vehicle; an altitude measuring apparatus that measures an altitude of the unmanned aerial vehicle; and an information transmitting unit that transmits, to the free space location database, camera image data captured by the camera at every predetermined altitude, and the location, direction and altitude of the unmanned aerial vehicle at time of image capturing by the camera, and based on the camera image data, and the location, direction and altitude of the unmanned aerial vehicle, the free space location database corrects 3D data including terrain information to generate free space location data.

公开(公告)号：US20250166496A1

公开(公告)日：2025-05-22

申请号：US18849659

申请日：2023-02-20

Applicant: SoftBank Corp.

Inventor： Yosuke KOMIYAMA ,  Koyo ENOMOTO

IPC: G08G1/01 ,  G08G1/0967

Abstract: In a digital twin system including a vehicle and a server that generates a digital twin of the vehicle, a reduction in volume of communication traffic between the vehicle and the server is achieved without a decrease in accuracy of the digital twin. A vehicle (101) includes: a plurality of sensors (S); an acquisition section (11) that acquires detection data from the respective plurality of sensors; and a communication section (2) that transmits at least some of the acquired detection data to a server (102) which predicts a future state of the vehicle by input of the detection data, and that receives, from the server, a behavioral indication based on prediction, after transmitting the detection data, the communication section transmitting subsequent detection data on the basis of a determination result indicating whether it is possible to transmit the subsequent detection data.

公开(公告)号：US20250113188A1

公开(公告)日：2025-04-03

申请号：US18842903

申请日：2023-03-09

Applicant: SoftBank Corp.

Inventor： Ayumu Yabuki ,  Naozumi Ando

IPC: H04W12/062 ,  H04W12/0431 ,  H04W76/10

Abstract: Provided is a communication system capable of highly confidential and highly secure communication between an access point (AP) apparatus and a communication terminal even when constructing an open network environment of wireless connection. The communication system comprises an AP apparatus that uses radio waves in the terahertz band, a base station of a mobile communication network, and a server. When a connection request is made from the communication terminal to the AP apparatus, and when information of the connection request is received from the communication terminal via the base station, the server issues a common encryption key used for communication between the AP apparatus and the communication terminal, transmits the common encryption key to the communication terminal via the base station, and transmits the common encryption key to the communication terminal via the mobile communication network or another communication network. Each of the AP apparatus and the communication terminal receives the common encryption key from the server, and starts communication using the common encryption key.

公开(公告)号：US20250016848A1

公开(公告)日：2025-01-09

申请号：US18896709

申请日：2024-09-25

Applicant: SOFTBANK CORP.

Inventor： Katsunari UEMURA

IPC: H04W74/0833 ,  H04W28/02 ,  H04W52/24 ,  H04W80/02

Abstract: A terminal apparatus executing radio communication with a base station apparatus, the terminal apparatus: transmits a first message, including a random access preamble and identification information of the terminal apparatus, for starting a random access procedure to the base station apparatus; receives a second message, including a random access response to the first message, from the base station apparatus; and selects one random access preamble group from among a plurality of random access preamble groups on the basis of a first condition, a second condition, a third condition, and a status of the terminal apparatus, in order to notify the base station apparatus of the status of the terminal apparatus when transmitting the first message. Consequently, even when a 2-step random access procedure is adopted, radio resources for the radio communication between the base station apparatus and the terminal apparatus can be used efficiently.