Method and apparatus for transmitting and receiving data by terminal in wireless communication system

    公开(公告)号:US10681538B2

    公开(公告)日:2020-06-09

    申请号:US16077447

    申请日:2017-02-10

    Abstract: The present invention relates to a method and an apparatus for a first mobility management entity (MME) to activate a terminal in a wireless communication system. According to the present invention, it is possible to provide a method and an apparatus of receiving a notification message transmitted from a service gateway (S-GW) to a terminal managed by the first mobility management entity, for notifying an occurrence of a first downlink data; determining whether there exists at least one terminal linked with the terminal on a basis of a first context information of the terminal; and performing a paging procedure for transitioning the terminal and the at least one terminal to a connection state when the at least one terminal linked to the terminal exists.

    METHOD AND DEVICE FOR MEASURING DISTANCE IN WIRELESS COMMUNICATION SYSTEM

    公开(公告)号:US20200088866A1

    公开(公告)日:2020-03-19

    申请号:US16495240

    申请日:2018-03-22

    Abstract: According to one embodiment, a distance technique between a transmitter and a receiver for processing a signal in symbol units is presented. According to the embodiment, the transmitter transmits a transmission signal to the receiver through preset first and second frequencies. Then, the transmitter receives, from the receiver, a reception signal corresponding to the transmission signal. The reception signal includes a first reception component corresponding to the first frequency and a second reception component corresponding to the second frequency. The phase difference set by the receiver is applied between the phase of the first reception component and the phase of the second reception component. The phase difference is set on the basis of the difference between a reception time at which the transmission signal is received by the receiver and a processing time at which the transmission signal is processed in the receiver.

    Method and apparatus for transmitting and receiving channel information in inter-vehicle communication system

    公开(公告)号:US10567055B2

    公开(公告)日:2020-02-18

    申请号:US15576016

    申请日:2016-04-21

    Abstract: The present specification relates to a method by which a terminal transmits channel information to a base station in an inter-vehicle communication system. The method for transmitting channel information can comprise the steps of: measuring channel information and feeding the same back to the base station; and receiving data on the basis of the channel information. The terminal comprises a plurality of distributed antenna units (DU), and when it is possible to select whether to activate each of the plurality of DUs, a plurality of channel information sets are measured according to the number and the location of activated DUs, and the channel information to be fed back can include the plurality of channel information sets.

    Method for reporting channel state information in wireless communication system and apparatus for the same

    公开(公告)号:US10484068B2

    公开(公告)日:2019-11-19

    申请号:US16200008

    申请日:2018-11-26

    Abstract: A method of reporting, by a user equipment (UE), channel state information (CSI) in a wireless communication system, includes: receiving, by the UE and from a base station (BS), downlink control information (DCI) related to an aperiodic CSI report that is to be performed by the UE in a slot n; determining, by the UE, a value nCQI_ref based on a number of symbols Z′ related to a time for computing the CSI; determining, by the UE, a CSI reference resource as being a slot n−nCQI_ref in a time domain that is to be used for the aperiodic CSI report; and transmitting, by the UE and to the BS, the aperiodic CSI report in the slot n, based on the CSI reference resource being slot n−nCQI_ref. The CSI may be calculated by using the most recent A CSI-RS, and thereby the most recent CSI may be reported.

    Beam scanning method using codebook in wireless communication system

    公开(公告)号:US10469149B2

    公开(公告)日:2019-11-05

    申请号:US15753536

    申请日:2016-07-29

    Abstract: Disclosed are a beam scanning method and a base station, the method in which generated is a code book comprising a plurality of second precoders, defined by the weighted sums of a plurality of first precoders, and in which a plurality of synchronization signals, to which applied are second precoders that are selected from the code book and differ from each other, are transmitted to a terminal over a plurality of time intervals. The synchronization signals are used in synchronization, beam scanning and cell ID acquisition of the terminal, and each weighted sum applied to the plurality of first precoders indicates a beam ID used in the beam scanning.

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