LISTEN-BEFORE-TALK OPERATION IN LAA
    2.
    发明公开

    公开(公告)号:EP3745805A1

    公开(公告)日:2020-12-02

    申请号:EP20186369.3

    申请日:2015-10-21

    IPC分类号: H04W74/08

    摘要: There is disclosed a method for operating a radio node for a wireless communication network, the radio node being adapted for transmitting communication data on at least one carrier based on a timing relative to a pre-defined time structure. The method comprises defining at least one freeze interval relative to the pre-defined time structure, performing a Listen-Before-Talk, LBT, procedure to determine whether accessing the at least one carrier for transmission is allowed, and, if accessing the at least one carrier for transmission is determined to be allowed based on performing the LBT procedure, starting transmission of communication data on the at least one carrier outside the at least one freeze interval. There are also disclosed a corresponding node, system, program product and storage medium.

    METHODS AND SYSTEMS FOR UNSCHEDULED UPLINK TRANSMISSIONS ON UNLICENSED BANDS

    公开(公告)号:EP3761744A1

    公开(公告)日:2021-01-06

    申请号:EP20192286.1

    申请日:2017-04-21

    IPC分类号: H04W74/02 H04W16/14 H04W72/12

    摘要: Performing an unscheduled uplink transmission by a user equipment, UE, in an unlicensed portion of a radio spectrum, the method comprising: performing (1002), by the UE, a listen before talk, LBT, operation in the unlicensed portion of the radio spectrum, wherein the LBT operation includes sensing the portion of the radio spectrum for a pre-determined minimum amount of time for traffic; and performing (1004), if no traffic was sensed, the unscheduled uplink transmission, by the UE, of data in an unscheduled mode of operation for at least one transmission burst. Receiving (10110) by the UE an uplink transmission grant. In response to receiving the grant, transmitting, by the UE, an uplink transmission burst of new data, and sending (1012), by the UE, an unscheduled retransmission for the data if a new uplink grant or HARQ ACK/NACK is not received from an eNB within a pre-specified time window.