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1. 发明授权

US10707949B2 Communication system, base station and communication control method 有权
公开(公告)号：US10707949B2
公开(公告)日：2020-07-07
申请号：US16078753
申请日：2017-01-26
申请人： SoftBank Corp.
发明人： Shota Shiobara , Takao Okamawari , Teruya Fujii
IPC分类号： H04W28/00 , H04B7/155 , H04W28/18 , H04W72/12 , H04J11/00 , H04B7/024 , H04L5/00 , H04W28/16 , H04W24/02 , H04B1/71 , H04W24/10 , H04W92/20 , H04B7/0452 , H04W36/30
摘要： A communication system, a base station and a communication control method are provided, which are capable of cooperatively transmitting data from a plurality of base stations to a plurality of communication terminals using a same radio resource. A first base station acquires a value of an interference suppression parameter that is applied to a transmission signal from the first base station so as to suppress interference from a second base station in a first communication terminal, when the first communication terminal locates in a cell border area. The second base station duplicates a desired data for a second communication terminal located in a cell of the second base station, and transmits the duplicated desired data to the first base station. The first base station generates a transmission signal based on the value of the interference suppression parameter, the desired data for the first communication terminal, the desired data for the second communication terminal received from the second base station and a control information on data cooperative transmission, and the second base station generates a transmission signal of the desired data for the second communication terminal. Each of the base stations cooperatively transmits the transmission signal at a predetermined data cooperative transmission timing.

2. 发明申请

US20190075535A1 COMMUNICATION SYSTEM AND SMALL-CELL BASE STATION 审中-公开
公开(公告)号：US20190075535A1
公开(公告)日：2019-03-07
申请号：US16080331
申请日：2017-01-30
申请人： SoftBank Corp.
发明人： Shota Shiobara , Takao Okamawari , Teruya Fujii
IPC分类号： H04W56/00 , H04W16/32
摘要： A deviation of time at which downlink signals synchronously transmitted from a macro-cell base station and a small-cell base station respectively reach a communication terminal apparatus can be made within an allowable range, without being affected by transmission delay in transmission cables of base station and propagation delay in radio transmission paths. The small-cell base station is provided with a radio transceiving section connected with antenna, a radio communication control section, a transmission cable connected with the radio transceiving section and the radio communication control section, and a downlink signal receiving section for receiving downlink signals transmitted from the macro-cell base station and the own base station respectively. The small-cell base station measures a reception-timing difference of downlink signals transmitted from the macro-cell base station and the own base station based on a reception result of the downlink signal, adjusts a transmission timing of downlink signal of the own base station based on the reception-timing difference, and transmits a downlink signal at the adjusted transmission timing.

3. 发明授权

US09668165B2 Measuring communication quality via a mobile communication network 有权
公开(公告)号：US09668165B2
公开(公告)日：2017-05-30
申请号：US14426493
申请日：2014-04-02
申请人： SoftBank Corp.
发明人： Liang Zhang , Takao Okamawari , Teruya Fujii
IPC分类号： H04L1/00 , H04W28/02 , H04W24/00 , H04M3/22
CPC分类号： H04W28/0236 , H04M3/2236 , H04M2207/18 , H04W24/00 , H04W24/10 , H04W28/0215 , H04W28/0226
摘要： 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.

4. 发明授权

US11057858B1 Base station, communication system and time synchronization method between base stations 有权
公开(公告)号：US11057858B1
公开(公告)日：2021-07-06
申请号：US16075685
申请日：2017-01-26
申请人： SoftBank Corp.
发明人： Sho Nabatame , Mitsukuni Konishi , Atsushi Nagate , Teruya Fujii
IPC分类号： H04W56/00 , H04L27/26 , H04L5/00
摘要： 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.

5. 发明申请

US20190090141A1 COMMUNICATION TERMINAL APPARATUS, SATELLITE BASE STATION, BASE-STATION CONTROL APPARATUS AND MOBILE COMMUNICATION SYSTEM 审中-公开
公开(公告)号：US20190090141A1
公开(公告)日：2019-03-21
申请号：US16084699
申请日：2017-01-31
申请人： SoftBank Corp.
发明人： Teruya Fujii
IPC分类号： H04W16/28 , H04W24/02 , H04B7/185 , H04W84/04 , H04W84/06 , H04W72/04
摘要： 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.

6. 发明申请

US20170318467A1 MOBILE COMMUNICATION SYSTEM AND RADIO RESOURCE CONTROL METHOD 审中-公开
公开(公告)号：US20170318467A1
公开(公告)日：2017-11-02
申请号：US15522013
申请日：2014-11-07
申请人： SoftBank Corp.
发明人： Teruya Fujii
IPC分类号： H04W16/04 , H04W16/32 , H04W72/04 , H04W84/04
CPC分类号： H04W16/04 , H04W16/32 , H04W28/16 , H04W72/0446 , H04W84/045
摘要： 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.

7. 发明授权

US09692531B2 Method and system of measuring communication quality 有权
公开(公告)号：US09692531B2
公开(公告)日：2017-06-27
申请号：US14911519
申请日：2015-02-02
申请人： SoftBank Corp.
发明人： Daisuke Maeda , Liang Zhang , Takao Okamawari , Teruya Fujii
IPC分类号： H04W24/08 , H04B17/309 , H04W24/10 , H04W88/02
CPC分类号： H04B17/309 , H04W24/08 , H04W24/10 , H04W88/02
摘要： 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.

8. 发明申请

US20170094052A1 COMMUNICATION SYSTEM AND COMMUNICATION METHOD 审中-公开
公开(公告)号：US20170094052A1
公开(公告)日：2017-03-30
申请号：US15126026
申请日：2014-04-02
申请人： SoftBank Corp.
发明人： Liang Zhang , Takao Okamawari , Teruya Fujii
IPC分类号： H04M3/22 , H04M3/26 , H04M1/24
CPC分类号： H04M3/2236 , H04M1/24 , H04M3/2227 , H04M3/26 , H04M2207/18
摘要： 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.

9. 发明申请

US20160345189A1 MOBILE COMMUNICATION SYSTEM AND BASE STATION CONTROL APPARATUS 审中-公开
标题翻译：移动通信系统和基站控制装置
公开(公告)号：US20160345189A1
公开(公告)日：2016-11-24
申请号：US15114470
申请日：2014-01-18
申请人： SOFTBANK CORP.
发明人： Junichi Miyagawa , Teruya Fujii
IPC分类号： H04W24/02 , H04B7/185 , H04W16/28 , H04W16/14 , H04W72/04
CPC分类号： H04W24/02 , H04B7/18517 , H04B7/18519 , H04W16/14 , H04W16/28 , H04W24/04 , H04W72/0446 , H04W84/042 , H04W84/06
摘要： 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.
摘要翻译：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。

10. 发明授权

US10862614B2 Base station apparatus 有权
公开(公告)号：US10862614B2
公开(公告)日：2020-12-08
申请号：US16072249
申请日：2017-01-25
申请人： SoftBank Corp.
发明人： Daigo Ogata , Atsushi Nagate , Teruya Fujii
IPC分类号： H04L1/00 , H04W16/32 , H04L1/16 , H04L5/00 , H04L1/18 , H04W28/04 , H04J11/00 , H04L27/26 , H04W72/04 , H04W72/08 , H04B7/0413
摘要： A base station apparatus capable of preventing occurrence of a communication delay when performing an inter-cell interference control using an ABS is provided. The base station apparatus is capable of performing an inter-cell interference control by setting an ABS pattern with one cycle of a predetermined number of subframes, and when the ABS pattern is to be switched, changes an MCS (Modulation and Coding Scheme) index value to be determined by an adaptive modulation control, for a communication within a predetermined period of time on or before a switching time of the switching, with respect to a subframe in which a communication with a mobile station apparatus is allowed before switching the ABS pattern.

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