公开(公告)号：US20190007107A1

公开(公告)日：2019-01-03

申请号：US16065091

申请日：2017-03-31

Applicant: LG ELECTRONICS INC.

Inventor： Hyungtae KIM ,  Kijun KIM ,  Jonghyun PARK ,  Haewook PARK

IPC: H04B7/0417 ,  H04B7/06 ,  H04B7/0456 ,  H04L5/00

Abstract: The present invention provides a method for reporting channel status information (CSI) for downlink transmission to an eNode B (eNB) by a user equipment (UE) in a wireless communication system. Specifically, the method comprises the steps of: receiving a channel status information-reference signal (CSI-RS) from the eNB; calculating the CSI on the basis of the CSI-RS under the assumption that a dual-precoder including a first precoder and a second precoder is applied; and reporting the CSI to the eNB, wherein the step of calculating the CSI includes a step for assuming that at least one of the first precoder and the second precoder is cyclically employed from a predetermined precoder candidate set on the basis of a predetermined resource unit; and information associated with the at least one precoder and information associated with the predetermined precoder candidate set are provided from the eNB through radio resource control (RRC) layer signaling.

公开(公告)号：US20180376359A9

公开(公告)日：2018-12-27

申请号：US15284393

申请日：2016-10-03

Applicant: LG ELECTRONICS INC.

Inventor： Kijun KIM ,  Jonghyun PARK ,  Hanbyul SEO ,  Hanjun PARK

IPC: H04W24/08 ,  H04L5/00

Abstract: A method of reporting channel state information (CSI) on a terminal in which a plurality of CSI processes are configured in a wireless communication system according to an embodiment of the present invention includes: measuring a channel based on a CSI reference signal (RS) resource related to one of the CSI processes; measuring interference based on a CSI-interference measurement (IM) resource related to the CSI process; determining CSI based on the measured channel and the measured interference; and reporting the CSI through an uplink channel, wherein a codebook for reporting the CSI, which is used for determining the CSI, is one of two or more codebooks that correspond independently to each of the CSI processes.

公开(公告)号：US20180323849A1

公开(公告)日：2018-11-08

申请号：US15773129

申请日：2016-11-02

Applicant: LG ELECTRONICS INC.

Inventor： Jonghyun PARK ,  Kijun KIM ,  Haewook PARK

IPC: H04B7/06 ,  H04L5/14 ,  H04L5/00 ,  H04W72/04

Abstract: Disclosed herein is a method of receiving a channel state information-reference signal (CSI-RS) of a user equipment (UE) in a wireless communication system, including receiving CSI-RS resource information about a CSI-RS resource location having the CSI-RS mapped thereto, from a base station and receiving the CSI-RS through a CSI-RS resource at a location determined based on the CSI-RS resource information, wherein the CSI-RS resource information includes an index value indicating a location of a CSI-RS resource element where the CSI-RS is transmitted, a period and offset information of a subframe where the CSI-RS is transmitted, and information on a number of antenna ports where the CSI-RS is transmitted, wherein when the index value indicates locations of different CSI-RS resource elements by types of the subframe where the CSI-RS is transmitted and the CSI-RS is set to be transmitted alternately through a normal subframe and a special subframe within one wireless frame, the location of the CSI-RS resource is determined in additional consideration of a type of the subframe in addition to the CSI-RS resource information.

公开(公告)号：US20180270757A1

公开(公告)日：2018-09-20

申请号：US15761295

申请日：2016-09-23

Applicant: LG ELECTRONICS INC.

Inventor： Joonkui AHN ,  Kijun KIM ,  Hanbyul SEO ,  Jonghyun PARK ,  Hanjun PARK ,  Seonwook KIM

IPC: H04W52/02 ,  H04W16/14 ,  H04W72/04 ,  H04W56/00

Abstract: Provided are a method for discontinuous reception (DRX) in an unlicensed band, and a device using the same. The device is converted from a sleep state to an active state, and attempts downlink synchronization during a synchronization period. If the device does not obtain the downlink synchronization during the synchronization period, downlink data is received in the unlicensed band on the assumption that the modulation order of the downlink data scheduled in the active state is not greater than a specific value.

公开(公告)号：US20180254867A1

公开(公告)日：2018-09-06

申请号：US15759624

申请日：2016-09-07

Applicant: LG ELECTRONICS INC.

Inventor： Kijun KIM ,  Hyungtae KIM ,  Jonghyun PARK

IPC: H04L5/00 ,  H04B7/0452

CPC classification number: H04L5/0048 ,  H04B7/0452 ,  H04L5/0023 ,  H04L5/0051

Abstract: The present invention relates to a wireless communication system, and specifically provides a method for transmitting and receiving a demodulation reference signal (DMRS), and an apparatus using the same. More specifically, the present invention provides a method for transmitting and receiving a DMRS and an apparatus using the same, wherein a base station allocates a Walsh sequence for each antenna port to the DMRS for each antenna port using a method that is different from conventional methods, and thereby increases the number of user equipment that are MU-MIMO paired compared to the past, and can satisfy orthogonality between four DMRS sequences in both time and frequency domains so that user equipment receiving the DMRS can efficiently estimate a channel.

公开(公告)号：US20180227106A1

公开(公告)日：2018-08-09

申请号：US15506206

申请日：2015-09-01

Applicant: LG ELECTRONICS INC.

Inventor： Seonwook KIM ,  Hanbyul SEO ,  Kijun KIM ,  Jonghyun PARK ,  Joonkui AHN ,  Hyukjin CHAE

IPC: H04L5/00 ,  H04W74/04 ,  H04W74/00 ,  H04W72/12

Abstract: The present invention relates to a wireless access system supporting an unlicensed band and, more particularly, to a method for measuring a channel state and an apparatus for supporting the same. One of methods for reporting channel state information (CSI) in a wireless access system supporting an unlicensed band may comprise: receiving an upper layer signal including channel state information-reference signal (CSI-RS) configuration information and channel state information-reference measurement (CSI-IM) configuration information for one or more transmission points (TP) included in a transmission opportunity (TxOP) duration; receiving a physical layer signal including TxOP configuration information that indicates which TP is included in the TxOP duration; measuring the CSI by using a CSI-RS resource and a CSI-IM resource for the TP indicated by the TxOP configuration information, on the basis of the CSI-RS configuration information and the CSI-IM configuration information; and reporting the measured CSI.

公开(公告)号：US20180205526A1

公开(公告)日：2018-07-19

申请号：US15743576

申请日：2016-07-29

Applicant: LG ELECTRONICS INC.

Inventor： Seonwook KIM ,  Joonkui AHN ,  Hanbyul SEO ,  Yunjung YI ,  Suckchel YANG ,  Jonghyun PARK

IPC: H04L5/00

Abstract: Disclosed are a TRS receiving method comprising: receiving, from a base station, information indicating that a TRS is transmitted in a subframe; receiving the TRS transmitted in the subframe; and performing tracking by using the TRS, and a terminal performing, in the subframe to which the TRS is transmitted, the demodulation of data or not transmitting an acknowledgement/negative ACK (ACK/NACK) for the data.

公开(公告)号：US20180198501A1

公开(公告)日：2018-07-12

申请号：US15741143

申请日：2016-07-01

Applicant: LG ELECTRONICS INC.

Inventor： Haewook PARK ,  Kijun KIM ,  Jonghyun PARK

IPC: H04B7/04 ,  H04B7/06 ,  H04B7/0417

CPC classification number: H04B7/0486 ,  H04B7/0417 ,  H04B7/0469 ,  H04B7/0478 ,  H04B7/0626 ,  H04B7/0628 ,  H04B7/0639

Abstract: A method for configuring a codebook in a multi-antenna wireless communication system and a device for supporting the same are disclosed. Particularly, a method for configuring a codebook performed by a user equipment (UE) in a wireless communication system may include receiving a parameter for configuring a codebook C from a base station (BS) and configuring the codebook C using the parameter for configuring a codebook C, and the codebook C may be configured by Kronecker product of a vertical codebook Wv for a vertical antenna element and a horizontal codebook WH for a horizontal antenna element, the parameter for configuring a codebook C may include one or more of an upper limit value and a lower limit value in one-dimension of a beam, and an angle in the one dimension of a beam generated from the codebook C may be determined within the upper limit value and the lower limit value.

公开(公告)号：US20180097548A1

公开(公告)日：2018-04-05

申请号：US15569613

申请日：2016-05-12

Applicant: LG ELECTRONICS INC.

Inventor： Youngtae KIM ,  Kijun KIM ,  Yunjung YI ,  Jonghyun PARK

IPC: H04B7/0417 ,  H04B7/06

CPC classification number: H04B7/0417 ,  H04B7/04 ,  H04B7/0478 ,  H04B7/06 ,  H04B7/0626 ,  H04L5/00

Abstract: The present invention relates to a method and apparatus for feeding back, by a terminal, reference signal information in wireless communication using a two-dimensional active antenna system including a plurality of antennas. Particularly, the method for feeding back reference signal information comprises the steps of: receiving, from a base station, a reference signal configuration including identifiers of a plurality of reference signals having a first reference signal set and a second reference signal set; receiving the plurality of reference signals to which the precoding is applied; measuring reference signal received power (RSRP) for each of the plurality of reference signals; and transmitting, to the base station, information on at least a part of the first reference signal set and information on at least a part of the second reference signal set, on the basis of the measured RSRP. In addition, the precoding for the terminal is determined on the basis of the information on at least a part of the first reference signal set, and the interference information for the terminal can be determined on the basis of the information on at least a part of the second reference signal set.

公开(公告)号：US20180062814A1

公开(公告)日：2018-03-01

申请号：US15804375

申请日：2017-11-06

Applicant: LG ELECTRONICS INC.

Inventor： Kijun KIM ,  Jonghyun PARK

IPC: H04L5/00 ,  H04L27/26 ,  H04B7/06

CPC classification number: H04L5/0048 ,  H04B7/068 ,  H04B7/0684 ,  H04L5/0023 ,  H04L5/0057 ,  H04L5/0082 ,  H04L27/2601

Abstract: A method of transmitting channel state information (CSI)-reference signals (RS) at a base station in a wireless communication system includes generating a reference signal sequence, and mapping the reference signal sequence to resource elements (REs) included in one or more patterns for 8-port CSI-RS transmission among five patterns for 8-port CSI-RS transmission located in a first region of a PRB pair and three patterns for 8-port CSI-RS transmission located in a second region of the PRB pair. A maximum of two OFDM (orthogonal frequency division multiplexing) symbols is used for a physical downlink control channel in a subframe including the PRB pair.