UPLINK MULTI-ANTENNA TRANSMISSION METHOD IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR

    公开(公告)号:US20190181934A1

    公开(公告)日:2019-06-13

    申请号:US16279544

    申请日:2019-02-19

    Abstract: Disclosed in the present application is a method for transmitting, by a terminal, an uplink signal to a base station through a plurality of antenna ports in a wireless communication system. Specifically, the method comprises the steps of: transmitting, to the base station, uplink reference signals corresponding to the plurality of antenna ports and antenna port grouping information: receiving, from the base station, information on an uplink precoder, which is determined on the basis of the uplink reference signals and the antenna port group information; precoding the uplink signal using the information on the uplink precoder; and transmitting the precoded uplink signal to the base station, wherein the antenna port grouping information comprises information on antenna port groups comprising the plurality of antenna ports and information of the signal distortion level between the antenna port groups.

    METHOD FOR CHANGING SERVING CELL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR

    公开(公告)号:US20190174384A1

    公开(公告)日:2019-06-06

    申请号:US16324845

    申请日:2017-08-14

    Abstract: Disclosed are a method for changing a serving cell in a wireless communication system and an apparatus therefor. Specifically, the method performed by a UE may include: transmitting, to a serving cell, a measurement report for signals received from the serving cell and one or more cells; when a measurement value for a signal received from at least one cell among the one or more cells satisfies a predetermined specific triggering condition, receiving, from the serving cell, information representing that the at least one cell corresponds to a candidate cell for changing the serving cell; and performing synchronization for at least one of a downlink or an uplink with the at least one cell, by transmitting a specific uplink signal to the at least one cell.

    METHOD AND USER DEVICE FOR TRANSCEIVING DATA IN NEXT GENERATION MOBILE COMMUNICATION SYSTEM

    公开(公告)号:US20170310385A1

    公开(公告)日:2017-10-26

    申请号:US15517483

    申请日:2015-11-03

    Abstract: A disclosure of the present specification provides a method for transceiving data in a next generation mobile communication system. The method may comprise a step of receiving system information from a base station. The system information may comprise: system band information; information regarding a first uplink center frequency and a second uplink center frequency for an uplink band within the system band; and information regarding a first downlink center frequency and a second downlink center frequency for a downlink band within the system band. The method may comprise: a step of receiving, from the base station, a control signal to change the downlink band to a second downlink center frequency; and a step of tuning a radio frequency (RF) unit in order to switch the downlink band from the first downlink center frequency to the second downlink center frequency.

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