公开(公告)号：US20180316403A1

公开(公告)日：2018-11-01

申请号：US16028025

申请日：2018-07-05

Applicant: FUJITSU LIMITED

Inventor： Masafumi TSUTSUI ,  Hiroyuki Seki

IPC: H04B7/06 ,  H04B7/0456 ,  H04L5/00 ,  H04W16/28

CPC classification number: H04B1/40 ,  H04W16/28

Abstract: A base station system includes: a plurality of antenna units each of which includes an antenna and is configured to be coupled to the plurality of antenna units via a communication channel; and a control circuit configured to be connected to at least one of the plurality of antenna units via a communication line, the control circuit being configured to perform radio communication using any of the plurality of antenna units via the connected antenna unit.

公开(公告)号：US20130156122A1

公开(公告)日：2013-06-20

申请号：US13765462

申请日：2013-02-12

Applicant: FUJITSU LIMITED

Inventor： Masafumi TSUTSUI ,  Hiroyuki SEKI

IPC: H04B7/04

CPC classification number: H04B7/0413 ,  H04B7/0417 ,  H04B7/0632 ,  H04B7/088

Abstract: A wireless transmission method capable of transmitting a data stream between a wireless transmitter having a plurality of transmitting antennas and a wireless receiver, the wireless transmission method includes controlling to increase the number of transmission beams to be formed for transmitting said data stream depending on the number of data streams to be transmitted from said transmitting antennas becoming small, and receiving any one or more transmission beam from said transmission beams by said wireless receiver, wherein said transmission beams are formed by predetermined number of the plurality of transmitting antennas.

Abstract translation: 一种能够在具有多个发送天线的无线发送机与无线接收机之间发送数据流的无线发送方法，所述无线发送方法包括：控制为根据所述数量增加所形成的发送所述数据流的数量 从所述发送天线发送的数据流变小，并且由所述无线接收机从所述发送波束接收任何一个或多个发送波束，其中所述发送波束由预定数量的多个发送天线形成。

公开(公告)号：US20240170842A1

公开(公告)日：2024-05-23

申请号：US18466909

申请日：2023-09-14

Applicant: Fujitsu Limited

Inventor： Masafumi TSUTSUI

IPC: H01Q3/36 ,  H03H17/08

CPC classification number: H01Q3/36 ,  H03H17/08

Abstract: A phase shift amount adjustment device includes a memory and a processor to obtain reception power at a reception device that receives first and second signals from a transmission device that has first and second antennas to transmit the first and second signals whose phase shift amounts are adjusted by first and second phase shifters, respectively; store, in the memory, table data representing characteristics of amplitudes of the first and second signals with respect to change in the phase shift amounts of the phase shifters, respectively; calculate a squared value of a sum of first and second amplitudes of the first and second signals in first and second phase shift amounts of the phase shifters obtained from the table data; and adjust the first and second phase shift amounts so as to maximize an evaluation value obtained by dividing the reception power divided by the squared value.

公开(公告)号：US20160080194A1

公开(公告)日：2016-03-17

申请号：US14948578

申请日：2015-11-23

Applicant: FUJITSU LIMITED

Inventor： Masafumi TSUTSUI

IPC: H04L12/24 ,  H04W72/00 ,  H04L29/08 ,  H04W72/04

CPC classification number: H04L41/0654 ,  H04L41/06 ,  H04L41/0856 ,  H04L67/1034 ,  H04W16/14 ,  H04W72/005 ,  H04W72/0453

Abstract: An interface accesses a server for managing usage of a plurality of frequency resources allocated to a first wireless system and acquires information indicating the usage. Based on the acquired information, a control unit selects, amongst the frequency resources, a frequency resource to be used by a second wireless system. The control unit determines whether, after the information is acquired at a first time point, reacquisition of the information at a second time point is successful, which second time point is scheduled to reacquire the information from the server. If the reacquisition is unsuccessful, the control unit allows a frequency resource for the second wireless system to be selected based on the information acquired at the first time point even from the second time point onward.

Abstract translation: 接口访问用于管理分配给第一无线系统的多个频率资源的使用的服务器，并且获取指示使用的信息。 基于所获取的信息，控制单元在频率资源之中选择要由第二无线系统使用的频率资源。 控制单元确定在第一时间点获取信息之后，在第二时间点重新获取信息是否成功，哪个第二时间点被调度为从服务器重新获取信息。 如果重新获取不成功，则控制单元允许基于从第二时间点起在第一时间获取的信息来选择第二无线系统的频率资源。

公开(公告)号：US20180352446A1

公开(公告)日：2018-12-06

申请号：US15994413

申请日：2018-05-31

Applicant: FUJITSU LIMITED

Inventor： Masafumi TSUTSUI

IPC: H04W16/28 ,  H04B7/06

Abstract: A communication control method, for causing a wireless communication device including an antenna array including a plurality of antenna elements to execute a process, includes: executing a first process that includes dividing the plurality of antenna elements into a plurality of element blocks, each of the plurality of element blocks including two or more antenna elements; executing a second process that includes forming a broad beam by steering beams that are formed by first and second element blocks of the plurality of element blocks the beam formed by the first element block being orthogonalized with the beam formed by the second element block; and executing a third process that includes orthogonalizing a first signal to be transmitted by the first element block and a second signal to be transmitted by the second element block.

公开(公告)号：US20130148757A1

公开(公告)日：2013-06-13

申请号：US13765476

申请日：2013-02-12

Applicant: FUJITSU LIMITED

Inventor： Masafumi TSUTSUI ,  Hiroyuki SEKI

IPC: H04B7/04

CPC classification number: H04B7/0413 ,  H04B7/0417 ,  H04B7/0632 ,  H04B7/088

Abstract: A wireless transmitter capable of transmitting a data stream to a wireless receiver, the wireless transmitter includes a plurality of transmitting antennas; and a scheduler controls to increase the number of candidate beams selectable for transmitting said data stream depending on the number of data streams to be transmitted from said transmitting antennas becoming small, wherein said beams are formed by predetermined number of the plurality of transmitting antennas.

Abstract translation: 一种能够向无线接收机发送数据流的无线发射机，所述无线发射机包括多个发射天线; 并且调度器根据从所述发送天线发送的数据流的数量增加可选择的用于发送所述数据流的候选波束的数量变小，其中所述波束由预定数量的多个发射天线形成。