公开(公告)号：US20190132825A1

公开(公告)日：2019-05-02

申请号：US16233874

申请日：2018-12-27

Applicant: FUJITSU CONNECTED TECHNOLOGIES LIMITED

Inventor： YOSHINORI TANAKA

IPC: H04W72/04 ,  H04W16/14 ,  H04L5/00 ,  H04W74/08 ,  H04L27/26 ,  H04W76/10 ,  H04L27/06

Abstract: A wireless communications system configured to perform wireless communication by using a first band dedicated to the system and a second band shared by the system and another wireless communications system, the system including: a base station configured to transmit in the first band to the terminal, a control signal permitting data transmission in the second band from a terminal to the base station; and the terminal configured to detect an available carrier wave of the second band after a predetermined time from the transmission of the control signal by the base station, the terminal performing the data transmission after waiting until detection of the available carrier wave.