公开(公告)号：US20190174373A1

公开(公告)日：2019-06-06

申请号：US16092659

申请日：2017-03-03

Applicant: SoftBank Corp.

Inventor： Noboru Kanazawa ,  Daigo Ogata ,  Atsushi Nagate ,  Teruya Fujii

IPC: H04W36/00 ,  H04W36/08 ,  H04W36/30

Abstract: A base station, a mobile communication system and a handover control method are provided, which are capable of preventing a handover failure and a ping-pong handover phenomenon which are caused by an interference from a neighboring cell to a serving cell. When a received power difference (S2−S1) between a received power S2 from a neighboring second base station, which is fed back from a mobile station, and a received power S1 from first base station, becomes larger than a predetermined threshold value, the first base station to which the mobile station is connected requests the second base station to stop a transmission of a downlink signal including at least one of a data signal and a control signal. In response to the transmission-stop request, the second base station performs a determination of a radio resource in which the transmission of the downlink signal is to be stopped and a notification of the radio resource to the first base station, and stops a transmission of a downlink signal. The first base station allocates the radio resource notified from the second base station or a radio resource partially including the notified radio resource, as a radio resource used for the downlink signal to the mobile station.

公开(公告)号：US20190089453A1

公开(公告)日：2019-03-21

申请号：US16078753

申请日：2017-01-26

Applicant: SoftBank Corp.

Inventor： Shota Shiobara ,  Takao Okamawari ,  Teruya Fujii

IPC: H04B7/155 ,  H04W28/18 ,  H04W72/12 ,  H04W92/20 ,  H04W24/10 ,  H04B1/71

Abstract: 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.

公开(公告)号：US20190036641A1

公开(公告)日：2019-01-31

申请号：US16072249

申请日：2017-01-25

Applicant: SoftBank Corp.

Inventor： Daigo Ogata ,  Atsushi Nagate ,  Teruya Fujii

IPC: H04L1/00 ,  H04W72/08 ,  H04W16/32 ,  H04L1/18 ,  H04W28/04 ,  H04W72/04 ,  H04J11/00 ,  H04L27/26

Abstract: 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.

公开(公告)号：US20160360436A1

公开(公告)日：2016-12-08

申请号：US14911531

申请日：2015-01-21

Applicant: SOFTBANK CORP

Inventor： Liang Zhang ,  Takao Okamawari ,  Teruya Fujii

IPC: H04W24/10 ,  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.

Abstract translation: 提供了通过移动通信网络进行通信测量通信质量的方法和系统。 当将通信终端装置侧的测量数据从通信终端装置发送到服务器的定时到来时，确认通信终端装置与移动通信网络的连接状态。 基于连接状态的确认结果，当确定其是能够收发测量数据的状态时，测量数据从通信装置发送到服务器，并且测量数据不从通信终端设备发送到服务器 当确定它不是能够收发测量数据的状态。 基于从通信终端装置接收的测量数据，测量通过移动通信网络进行通信的通信质量。

公开(公告)号：US20160261737A1

公开(公告)日：2016-09-08

申请号：US14427443

申请日：2014-04-02

Applicant: SoftBank Corp.

Inventor： Liang Zhang ,  Takao Okamawari ,  Teruya Fujii

IPC: H04M3/22 ,  H04M1/24

CPC classification number: H04M3/2236 ,  H04M1/24 ,  H04M3/26 ,  H04M3/367

Abstract: Communication systems and communication methods are provided, by which load of a communication network when measuring a voice communication quality can be suppressed. A test signal for voice communication quality evaluation is transmitted to a communication terminal apparatus via a communication network, and a received voice data encoded by a predetermined scheme for the test signal received with the communication terminal apparatus is received from the communication terminal apparatus. A received voice signal is generated from the received voice data received from the communication terminal apparatus, and a evaluation value of voice communication quality is calculated by comparing the generated received voice signal with the test signal before transmitting.

Abstract translation: 提供通信系统和通信方法，可以抑制通信网络在测量语音通信质量时的负担。 用于语音通信质量评估的测试信号通过通信网络发送到通信终端设备，并且从通信终端设备接收用于通信终端设备接收的测试信号的预定方案编码的接收到的语音数据。 从从通信终端装置接收的接收到的语音数据生成接收到的语音信号，并且通过将所生成的接收语音信号与发送前的测试信号进行比较来计算语音通信质量的评估值。