公开(公告)号：US20180007699A1

公开(公告)日：2018-01-04

申请号：US15546108

申请日：2015-02-12

申请人： Hitachi Kokusai Electric Inc.

发明人： Takahito ISHII

IPC分类号： H04W72/12 ,  H04W16/12 ,  H04W72/04 ,  H04W52/60 ,  H04W4/00 ,  H04W4/02

CPC分类号： H04W72/12 ,  H04L67/325 ,  H04W4/021 ,  H04W4/04 ,  H04W4/08 ,  H04W4/70 ,  H04W16/12 ,  H04W52/60 ,  H04W72/0413 ,  H04W72/048 ,  H04W72/121

摘要： A communication timing control method for a communication service system provided with wireless communication devices, a wireless network, and an upper server groups the wireless communication devices using device information including characteristics of a service provided to the wireless communication devices entering the communication service system via the wireless network, characteristics of communication data handled in an execution application for receiving the provided service, and transfer characteristics of the wireless communication devices receiving the provided service. Next, a group-specific communication timing is determined for the grouped wireless communication devices. Next, communication is performed on the basis of the determined communication timing.

公开(公告)号：US20210135357A1

公开(公告)日：2021-05-06

申请号：US16981924

申请日：2018-03-20

申请人： HITACHI KOKUSAI ELECTRIC INC.

发明人： Satoru YASUI ,  Takahito ISHII ,  Keiju ITO ,  Teppei SHOJI ,  Koji YOTSUMOTO

IPC分类号： H01Q3/30 ,  H04B7/08 ,  H04B17/27

摘要： An antenna control device includes a weight unit in which weight values to be superimposed on transmission/reception signals are set for forming radiation patterns using a plurality of antennas and a weight synthesis unit that superposes the weight values on the transmission/reception signals. The antenna control device further includes an arrival direction detector that detects arrival directions of the reception signals, a distribution information calculator that calculates distribution information of the detected arrival directions, a signal quality calculator that calculates signal quality information of each of the radiation patterns, and a radiation pattern selector that selects a radiation pattern on the basis of the distribution information and signal quality information for the radiation patterns, and sets the weight values corresponding to the selected radiation pattern in the weight unit.

公开(公告)号：US20170289912A1

公开(公告)日：2017-10-05

申请号：US15510757

申请日：2015-09-29

申请人： HITACHI KOKUSAI ELECTRIC INC.

发明人： Takahito ISHII ,  Takekazu YOSHINAGA

IPC分类号： H04W52/02 ,  H04W24/08

CPC分类号： H04W52/0235 ,  H04B1/40 ,  H04L1/00 ,  H04L1/20 ,  H04L1/22 ,  H04M1/73 ,  H04W24/08 ,  H04W52/0274 ,  H04W88/06 ,  Y02D70/00 ,  Y02D70/40

摘要： In a communication control method for a communication terminal device including a plurality of communication units corresponding to different communication schemes or communication systems to perform communication in parallel, when a first communication unit performs transmission, transmission/reception of another communication unit is stopped. Then, a transmission/reception stop duration of the another communication unit is set to be equal to or less than a predetermined number of synchronization protection stages.