公开(公告)号：US20160262043A1

公开(公告)日：2016-09-08

申请号：US14426493

申请日：2014-04-02

Applicant: SoftBank Corp.

Inventor： Liang Zhang ,  Takao Okamawari ,  Teruya Fujii

IPC: H04W28/02 ,  H04M3/22

CPC classification number: H04W28/0236 ,  H04M3/2236 ,  H04M2207/18 ,  H04W24/00 ,  H04W24/10 ,  H04W28/0215 ,  H04W28/0226

Abstract: Methods and systems of measuring communication quality are provided, by which various types of communication quality measurements can be flexibly performed as the measurement condition can be set or changed easily and optionally, while load of processing in the communication terminal apparatus can be suppressed. Measurement condition for measuring communication quality is delivered to a communication terminal apparatus capable of communicating via a mobile communication network and a communication with the communication terminal apparatus via the mobile communication network is performed at a predetermined timing that satisfies the measurement condition. Then, at least one of terminal-side measurement data including terminal-status log information and network-side measurement data including terminal-existing base-station quality information corresponding to communication corresponding to the predetermined timing which are recorded in the communication terminal apparatus is acquired, and an index value of communication quality in communication via the mobile communication network is calculated based on at least one of the terminal-side measurement data and the network-side measurement data.

Abstract translation: 提供了测量通信质量的方法和系统，通过该方法和系统可以灵活地执行各种类型的通信质量测量，因为可以容易地和任选地在可以抑制通信终端设备中的处理负载的情况下设置或改变测量条件。 在满足测量条件的预定定时执行用于测量通信质量的测量条件被传送到能够经由移动通信网络进行通信的通信终端设备，并且经由移动通信网络与通信终端设备进行通信。 然后，获取终端侧测量数据，包括终端状态日志信息和网络侧测量数据，该网络侧测量数据包括对应于记录在通信终端设备中的与预定定时相对应的通信的终端存在基站质量信息 并且基于终端侧测量数据和网络侧测量数据中的至少一个来计算经由移动通信网络进行通信的通信质量的索引值。

公开(公告)号：US11996624B2

公开(公告)日：2024-05-28

申请号：US18033579

申请日：2021-10-06

Applicant: SoftBank Corp.

Inventor： Teruya Fujii

IPC: H01Q1/28 ,  H01Q1/20 ,  H01Q3/02

CPC classification number: H01Q3/02 ,  H01Q1/20 ,  H01Q1/28

Abstract: In a drone-type radio relay apparatus, it is provided of an antenna system capable of suppressing an inclination of an antenna due to a strong wind during a stationary flight (hovering). The antenna system is provided with a long-shaped antenna 110 connected to a relay station via a cable, and an antenna guide mechanism that is fixed to a body of a drone and guides the antenna so as to be movable in an up-down direction of a basic attitude of the drone.

公开(公告)号：US20230333256A1

公开(公告)日：2023-10-19

申请号：US18253234

申请日：2021-10-06

Applicant: SoftBank Corp.

Inventor： Teruya Fujii

IPC: G01S19/11 ,  H04B17/27

CPC classification number: G01S19/115 ,  H04B17/27

Abstract: It is provided of a system capable of estimating a current position of a terminal apparatus, even if a terminal apparatus for mobile communication is in a condition of non-receiving or inability to receive GNSS signals. A radio relay apparatus, in which a relay station mounted on a drone, transmits radio waves from a directional antenna toward the ground while flying in an upper airspace above a target area on the ground, and transmits position information on its own apparatus obtained based on the GNSS signal, to an information processing apparatus. The terminal apparatus measures a reception power or a reception quality of radio waves transmitted from the radio relay apparatus, and transmits reception measurement information regarding the measurement result of the reception power or the reception quality, to the information processing apparatus. The information processing apparatus estimates the position of the terminal apparatus in the target area, based on the position information from the radio relay apparatus received in a flight time period during which the radio relay apparatus flies in the upper airspace above the target area and the reception measurement information from the terminal apparatus. The information processing apparatus may estimate the position where the reception power or the reception quality from the terminal apparatus is maximum, as the position of the terminal apparatus.

公开(公告)号：US11057858B1

公开(公告)日：2021-07-06

申请号：US16075685

申请日：2017-01-26

Applicant: SoftBank Corp.

Inventor： Sho Nabatame ,  Mitsukuni Konishi ,  Atsushi Nagate ,  Teruya Fujii

IPC: H04W56/00 ,  H04L27/26 ,  H04L5/00

Abstract: A base station, a communication system and a time synchronization method between base stations are provided, which are capable of performing a time synchronization with another base station using a downlink signal of the other base station cell in which the own cell is located, without stopping transmission of the own base station even during operation. A base station receives a downlink signal that includes a downlink signal including a synchronization signal transmitted from the other base station and a downlink wraparound signal transmitted from own base station, removes an interference of the wraparound signal from the downlink received signal, with respect to a predetermined subframe in which the downlink wraparound signal from own base station interferes with the synchronization signal of the base station, among subframes of the downlink signal including the synchronization signal of the base station, performs a time synchronization processing with the base station by detecting a synchronization signal timing of the base station based on the downlink received signal from which the interference of wraparound signal is removed.

公开(公告)号：US20190090141A1

公开(公告)日：2019-03-21

申请号：US16084699

申请日：2017-01-31

Applicant: SoftBank Corp.

Inventor： Teruya Fujii

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

Abstract: A communication terminal apparatus, a terrestrial cellular base station and a mobile communication system are provided, which are capable of being shared in a terrestrial cellular mobile communication system and a satellite mobile communication system, and preventing an interference between beams in a satellite mobile communication system while preventing an interference between both systems by a simple switching control of radio resources. Time slots of radio resources are allocated so as not to overlap with each other between the terrestrial cellular mobile communication system and the satellite mobile communication system and so as not to overlap with each other between adjacent beams corresponding to each of two or more beams of the satellite mobile communication system. When locating in a beam area covered by any one of two or more beams of the satellite mobile communication system, a radio communication of the satellite mobile communication system is performed using the time slots allocated to the beam covering the beam area.

公开(公告)号：US20170318467A1

公开(公告)日：2017-11-02

申请号：US15522013

申请日：2014-11-07

Applicant: SoftBank Corp.

Inventor： Teruya Fujii

IPC: H04W16/04 ,  H04W16/32 ,  H04W72/04 ,  H04W84/04

CPC classification number: H04W16/04 ,  H04W16/32 ,  H04W28/16 ,  H04W72/0446 ,  H04W84/045

Abstract: Mobile communication systems and radio resource control methods are provided, by which interference between two or more base stations can be suppressed and an inter-cell adjusting control of radio resources for each of the two or more base stations can be simplified in a mobile communication system including two or more base stations, at least a part of each cell of the base stations being mutually overlapped. Two or more cell layers are configured by grouping the two or more base station. An inter-cell adjusting control of radio resources (for example, at least one of a synchronization control of time slots and an allocation control of time slots) between the two or more cell layers is performed. An inter-cell adjusting control of radio resources between two or more base stations included in the cell layer (for example, at least one of a synchronization control of time slots and an allocation control of time slots) for each of the cell layers is also performed.

公开(公告)号：US09692531B2

公开(公告)日：2017-06-27

申请号：US14911519

申请日：2015-02-02

Applicant: SoftBank Corp.

Inventor： Daisuke Maeda ,  Liang Zhang ,  Takao Okamawari ,  Teruya Fujii

IPC: H04W24/08 ,  H04B17/309 ,  H04W24/10 ,  H04W88/02

CPC classification number: H04B17/309 ,  H04W24/08 ,  H04W24/10 ,  H04W88/02

Abstract: Methods and systems of measuring communication quality are provided, by which measurement schedules of communication quality can be managed and controlled easily. A plural measurement-time slot is set with respect to a communication line used for communication quality measurements between a plural communication terminal apparatus via a mobile communication network, wherein each measurement-time slot has a time corresponding to one measurement of communication quality and the plural measurement-time slot is continuously arranged at a predetermined period, and a plural measurement schedule for measuring communication quality in each of communications with the plural communication terminal apparatus to the plural measurement-time slot. Information of the measurement schedule for each of the plural communication terminal apparatus is delivered to each communication terminal apparatus, and a communication for the communication quality measurement with the communication terminal apparatus corresponding to the measurement schedule via the communication line is performed when the time of measurement schedule comes.

公开(公告)号：US20170094052A1

公开(公告)日：2017-03-30

申请号：US15126026

申请日：2014-04-02

Applicant: SoftBank Corp.

Inventor： Liang Zhang ,  Takao Okamawari ,  Teruya Fujii

IPC: H04M3/22 ,  H04M3/26 ,  H04M1/24

CPC classification number: H04M3/2236 ,  H04M1/24 ,  H04M3/2227 ,  H04M3/26 ,  H04M2207/18

Abstract: Communication systems and communication methods capable of evaluating a voice quality in a voice communication of a communication network and a presence or absence of a call drop of the voice communication are provided. A voice communication of transceiving a test signal for voice communication quality evaluation between a communication terminal apparatus 100 and a voice communication evaluation system 400 via the communication network 300 is performed. A voice quality evaluation value is calculated based on the test signal before transmission and the test signal after reception in the voice communication. A presence or absence of a call drop of the voice communication is determined based on a presence or absence of reception interruption of the test signal.

公开(公告)号：US20160345189A1

公开(公告)日：2016-11-24

申请号：US15114470

申请日：2014-01-18

Applicant: SOFTBANK CORP.

Inventor： Junichi Miyagawa ,  Teruya Fujii

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

CPC classification number: H04W24/02 ,  H04B7/18517 ,  H04B7/18519 ,  H04W16/14 ,  H04W16/28 ,  H04W24/04 ,  H04W72/0446 ,  H04W84/042 ,  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.

Abstract translation: 提供了移动通信系统和基站控制装置，通过该移动通信系统和基站控制装置，可以在防止地面蜂窝移动通信系统和卫星移动通信系统之间的干扰的同时提高频谱效率，并且可以更确切地提供使用移动站装置的移动通信业务 在陆地蜂窝基站的一部分发生故障的紧急情况。 相同的频带用于移动站装置10与人造卫星40的每个地面蜂窝基站20和通信中继装置41之间的无线电通信。在陆地蜂窝基站20中使用的无线电资源和使用的无线电资源 分配在地面蜂窝移动通信系统和卫星移动通信系统可用的公共区域中的卫星基站30，以便彼此不重叠，并且在卫星基站中分配的无线电资源在 在陆地蜂窝基站的一部分发生故障的情况下，比正常情况下更多的情况。

公开(公告)号：US12192688B2

公开(公告)日：2025-01-07

申请号：US18555565

申请日：2022-04-12

Applicant: SoftBank Corp.

Inventor： Teruya Fujii

IPC: H04Q11/00

Abstract: Provided is a repeater-type radio relay system that can prevent loop interference of radio waves with the same frequency and does not require a frequency for relaying. The radio relay system is provided with one or more optical fibers for relaying an optical communication between a relay-source radio relay apparatus and a relay-destination radio relay apparatus. The relay-source radio relay apparatus has a network-side communication section for communicating with a mobile-communication network side, and an electro-optical signal conversion section of relay source for converting between an electrical signal in the mobile-communication network side received from the network-side communication section and an optical signal propagating through the optical fiber. The relay-destination radio relay apparatus has a terminal-side communication section for wirelessly communicating with the terminal apparatus side, and an electro-optical signal conversion section of relay destination for converting between an electric signal in the terminal apparatus side received from the terminal-side communication section and an optical signal propagating through the optical fiber.