公开(公告)号：US20170265037A1

公开(公告)日：2017-09-14

申请号：US15437859

申请日：2017-02-21

申请人： FUJITSU LIMITED

发明人： Kensuke SAWADA ,  Shinichiro MORI

IPC分类号： H04W4/02 ,  G01S5/02

CPC分类号： H04W4/023 ,  G01S5/0289 ,  H04W64/003 ,  Y02D70/00 ,  Y02D70/144

摘要： A method includes: receiving beacon signals transmitted by each of a plurality of beacon devices around a positioning target terminal; first calculating, based on the received beacon signals, location information indicating locations of a plurality of mobile beacon devices included in the plurality of beacon devices; selecting a plurality of second mobile beacon devices from among the plurality of mobile beacon devices by excluding one or more first mobile beacon devices having similar azimuth directions from the positioning target terminal among the plurality of mobile beacon devices based on the calculated location information; and second calculating by circuitry, based on the selected plurality of second mobile beacon devices, a location of the positioning target terminal.

公开(公告)号：US20190068302A1

公开(公告)日：2019-02-28

申请号：US16103353

申请日：2018-08-14

申请人： FUJITSU LIMITED

发明人： Akihiro WADA ,  Teruhisa Ninomiya ,  Makoto HAMAMINATO ,  Hiromasa Yamauchi ,  Kaoru Yokoo ,  Kensuke SAWADA

IPC分类号： H04B17/318 ,  H04B17/391 ,  H04B17/27 ,  H04B17/29 ,  H04B17/21 ,  H04W4/02 ,  H04W64/00

摘要： An information processing apparatus includes a memory, and a processor coupled to the memory and configured to obtain location information indicating locations of a wireless transmitter and a wireless receiver, simulate a first power of a first reception signal at the wireless receiver in a condition that a radio signal is transmitted from the wireless transmitter, identify a first probability distribution model in accordance with the first reception signal, identify a first parameter of the first probability distribution model in accordance with the first power and a propagation environment defined by the locations of the wireless transmitter and the wireless receiver indicated by the location information, and based on the first probability distribution model using the first parameter, simulate a second power of a second reception signal at around the wireless receiver.