Apparatus and method for selecting best beam in wireless communication system

    公开(公告)号:US10667268B2

    公开(公告)日:2020-05-26

    申请号:US15480004

    申请日:2017-04-05

    Abstract: An apparatus and method for selecting the best beam in a wireless communication system are provided. An operation of a Base Station (BS) includes repeatedly transmitting reference signals beamformed with a first width, receiving a feedback signal indicating at least one preferred-beam having the first width from at least one terminal, determining a direction range within which reference signals beamformed with a second width are to be transmitted and a transmission pattern, based on the at least one preferred-beam having the first width, repeatedly transmitting the reference signals beamformed with the second width within the determined direction range according to the transmission pattern, and receiving a feedback signal indicating at least one preferred-beam having the second width from the at least one terminal.

    Channel estimation method and apparatus in wireless communication system

    公开(公告)号:US10181965B2

    公开(公告)日:2019-01-15

    申请号:US15323393

    申请日:2015-11-30

    Abstract: The present disclosure relates to a 5G or a pre-5G communication system to be provided in order to support a higher data transmission rate than a beyond 4G communication system such as LTE. A method for estimating a channel, by a terminal, in a wireless communication system supporting beamforming using a plurality of antenna elements, which embodiments of the present disclosure provide, comprises: a step of receiving, from a base station, a set of reference beams including a plurality of reference beams; a step of selecting at least one effective beam from the plurality of reference beams included in the set of reference beams; a step of estimating a channel between the base station and the terminal on the basis of the selected effective beam; a step of generating channel information regarding the estimated channel; and a step of transmitting the generated channel information to the base station.

    Apparatus and method for acquiring D2D synchronization information

    公开(公告)号:US09801148B2

    公开(公告)日:2017-10-24

    申请号:US14707535

    申请日:2015-05-08

    CPC classification number: H04W56/001

    Abstract: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). An apparatus and method for acquiring synchronization information through the transmission and reception of signals between devices for device to device (D2D) communication is provided. A method for a user equipment (UE) in a wireless communication system includes detecting a synchronization signal of another UE in a predetermined measurement gap. The method also includes transmitting a detected result of the synchronization signal to an evolved Node B (eNB). A start time point of the measurement gap in a first measurement gap period and a start time point of the measurement gap in a second measurement gap period are different from each other.

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