Connectivity supporting method for D2D communication and wireless device

    公开(公告)号:US10187769B2

    公开(公告)日:2019-01-22

    申请号:US15536116

    申请日:2015-12-24

    Abstract: A disclosure of the present specification provides a method for supporting connectivity of device-to-device (D2D) communication between a first wireless device and a second wireless device. The method may comprise the steps of: receiving, by a third wireless device, information on a resource pool which can be used for D2D communication, from a base station; transmitting, by the third wireless device, information on a resource which can be used for D2D communication between the first wireless device and the second wireless device to the first wireless device and the second wireless device, on the basis of the received information; and performing, by the third wireless device, a procedure for providing necessary data to the second wireless device when the disconnection of the D2D communication link between the first wireless device and the second wireless device is detected.

    Method and apparatus for transmitting channel state information in wireless communication system

    公开(公告)号:US10171153B2

    公开(公告)日:2019-01-01

    申请号:US14891057

    申请日:2014-06-05

    Abstract: The present invention relates to a wireless communication system. A method for a terminal for transmitting channel state information (CSI) in a wireless communication system according to an embodiment of the present invention comprises the steps of: subsampling a first codebook associated with a first precoding matrix indicator (PMI) and a second codebook associated with a second PMI according to a reporting mode for a four-antenna port; and reporting the channel state information on the basis of the subsampled first codebook and second codebook, wherein a second codebook index for the second PMI may have any one index from a first index group if the first codebook index for the first PMI is an odd number, and if same is an even number, may have any one index from a second index group.

    METHOD FOR REPORTING CHANNEL STATE IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR

    公开(公告)号:US20180331742A1

    公开(公告)日:2018-11-15

    申请号:US15773097

    申请日:2016-10-31

    Abstract: A method for reporting an aperiodic channel condition in a wireless communication system, according to an embodiment of the present invention, is performed by a terminal. The method comprises the steps of: receiving, from a base station, setting for one or more channel state information (CSI) processes including a plurality of channel state information-reference signals (CSI-RS) resources, wherein precoding is applied to each of the plurality of CSI-RS resources; receiving an aperiodic CSI report request from the base station; and transmitting, to the base station, an aperiodic CSI for a CSI process indicated by the aperiodic CSI report request, wherein, if a certain time has not elapsed after a CSI-RS resource index for the CSI process indicated by the aperiodic CSI report request is reported, the transmitted aperiodic CSI may include a CSI-RS resource index for a CSI process which has not been updated.

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

    公开(公告)号:US10116371B2

    公开(公告)日:2018-10-30

    申请号:US14914126

    申请日:2014-10-24

    Abstract: Disclosed are a method for reporting channel state information in a wireless communication system and an apparatus therefor. A method by which user equipment reports channel state information (CSI) in a wireless communication system, according to one embodiment of the present invention, comprises the steps of: receiving, from a base station, an RRC message including at least one CSI-reference signal (CSI-RS) configuration for a first direction domain; respectively receiving through different subframes, a first CSI-RS from a first subset and a second CSI-RS from a second subset among a plurality of physical antenna elements in the base station on the basis of the CSI-RS configuration; and performing a CSI report by using the first and second CSI-RSs, wherein when the CSI-RS configuration for the first direction domain is one, the first CSI-RS and the second CSI-RS are respectively received from the first subset and the second subset by virtualization-varying antenna ports related to one CSI-RS configuration in a predetermined period.

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