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    COMMUNICATION SYSTEM AND COMMUNICATION TERMINAL
    5.
    发明公开
    COMMUNICATION SYSTEM AND COMMUNICATION TERMINAL 审中-公开

    公开(公告)号：EP3911014A1

    公开(公告)日：2021-11-17

    申请号：EP20738716.8

    申请日：2020-01-07

    申请人： MITSUBISHI ELECTRIC CORPORATION

    发明人： SHIMODA, Tadahiro ,  MOCHIZUKI, Mitsuru ,  FUKUI, Noriyuki ,  UCHINO, Daichi ,  NAKAMURA, Kiyoshige

    IPC分类号： H04W36/08 ,  H04W56/00

    摘要： Provided is a radio communication technology with low latency and high reliability. A communication system includes a communication terminal (UE), and a plurality of communication apparatuses (a source gNB and a target gNB) configured to perform radio communication with the communication terminal. When the communication terminal switches a communication apparatus to which the communication terminal is connected from a first communication apparatus (the source gNB) to a second communication apparatus (the target gNB), the communication terminal corrects a time of the communication terminal, based on a timing reference to be transmitted from the second communication apparatus and timing advance of the second communication apparatus (Step ST1512).

    COMMUNICATIONS SYSTEM
    6.
    发明公开
    COMMUNICATIONS SYSTEM 审中-公开

    公开(公告)号：EP3606131A1

    公开(公告)日：2020-02-05

    申请号：EP18776349.5

    申请日：2018-02-28

    申请人： Mitsubishi Electric Corporation

    发明人： NAKAMURA, Kiyoshige ,  NAKAZAWA, Masayuki

    IPC分类号： H04W16/28 ,  H04B7/04 ,  H04B7/06 ,  H04W8/22

    摘要： A control overhead concerning beam selection of a base station and a terminal is reduced without reducing accuracy of the beam selection. A communication system includes a base station device, and at least one terminal device configured to be connected to the base station device so as to perform radio communication with the base station device. The base station device is configured to control a plurality of base station beams having different beam directions. The base station device transmits a reference signal through a corresponding base station beam. The reference signal is specific to each of the plurality of base station beams used by the at least one terminal device to measure reception quality of a signal from the base station device. The at least one terminal device notifies the base station device of terminal beam related information. The terminal beam related information concerns at least one terminal beam formed by the at least one terminal device. The base station device controls transmission of the reference signal through the plurality of base station beams, based on the terminal beam related information.