公开(公告)号：US20220015089A1

公开(公告)日：2022-01-13

申请号：US17280801

申请日：2019-09-27

Applicant: LG ELECTRONICS INC.

Inventor： Seokmin SHIN ,  Changhwan PARK ,  Joonkul AHN ,  Seunggye HWANG

IPC: H04W72/04 ,  H04W24/08 ,  H04W72/14 ,  H04L1/18 ,  H04W74/08

Abstract: Disclosed is a method for transmitting and receiving data between a user equipment (UE) and a base station in a narrowband wireless communication system. Specifically, the method includes transmitting, to the UE, a preconfigured uplink (UL) resource (PUR) configuration via RRC signalling, receiving, from the UE, uplink data on the PUR when the UE is in an idle mode, and transmitting, to the UE, a feedback for the uplink data, wherein the feedback is configured to be transmitted on an NPDCCH after a specific time has passed from the PUR reception.

公开(公告)号：US20210352690A1

公开(公告)日：2021-11-11

申请号：US17279936

申请日：2019-09-27

Applicant: LG ELECTRONICS INC.

Inventor： Seokmin SHIN ,  Changhwan PARK ,  Joonkui AHN ,  Seunggye HWANG

IPC: H04W72/12 ,  H04W72/04 ,  H04W72/14 ,  H04L1/18

Abstract: Provided is a method for receiving, by a user equipment (UE), a feedback from a base station in a wireless communication system supporting narrowband (NB)-internet of things (IoT). Specifically, the UE receives, from the base station, a preconfigured uplink (UL) resource (PUR) configuration via RRC signalling, transmits, to the base station, uplink data on the PUR when the UE is in an idle mode, and receive, from the base station, the feedback for the uplink data. The feedback is configured to be received on an NPDCCH after a specific time has passed from the PUR transmission.

公开(公告)号：US20210336819A1

公开(公告)日：2021-10-28

申请号：US17266424

申请日：2019-08-09

Applicant: LG ELECTRONICS INC.

Inventor： Jaehyung KIM ,  Seonwook KIM ,  Changhwan PARK ,  Seokmin SHIN ,  Joonkui AHN ,  Suckchel YANG ,  Seunggye HWANG

IPC: H04L25/02 ,  H04L27/26 ,  H04B7/06 ,  H04W72/04

Abstract: Disclosed are a method for channel estimation in a wireless communication system, and a device therefor. Particularly, the method for estimating a channel by a terminal in a wireless communication comprises the steps for: receiving, from a base station, configuration information for channel estimation, the configuration information comprising relationship information related to the relationship between a cell-specific reference signal (CRS) and a demodulation-reference signal (DM-RS); receiving the CRS from the base station; receiving, from the base station, on a specific channel, the DM-RS and machine type communication (MTC) control information; estimating the specific channel by using the CRS and DM-RS, on the basis of the relationship information; and decoding the MTC control information via the estimated specific channel, wherein the relationship information comprises information about a pre-coding relationship between the CRS and DM-RS, and power ratio information of the CRS with respect to the DM-RS, and the power ratio information is information related to the power ratio between a CRS port and DM-RS port for an idle mode.

公开(公告)号：US20210306182A1

公开(公告)日：2021-09-30

申请号：US17266949

申请日：2019-08-08

Applicant: LG ELECTRONICS INC.

Inventor： Jaehyung KIM ,  Seonwook KIM ,  Changhwan PARK ,  Seokmin SHIN ,  Joonkui AHN ,  Suckchel YANG ,  Seunggye HWANG

IPC: H04L25/02 ,  H04L5/00

Abstract: The present specification provides a method for estimating a channel by a terminal in a wireless communication system supporting machine-type communication (MTC). Particularly, the terminal receives, from a base station, configuration information for receiving a cell-specific reference signal (CRS) and a dedicated demodulation reference signal (DMRS), and receives the CRS on the basis of the configuration information. The terminal then receives the DMRS and control information by means of an MTC physical downlink control channel (MPDCCH), performs channel estimation for the MPDCCH on the basis of the DMRS and the CRS, and demodulates the control information on the basis of the channel estimation, wherein one precoder among a plurality of candidate precoders applied to the CRS is applied to the DMRS.

公开(公告)号：US20210227491A1

公开(公告)日：2021-07-22

申请号：US16095819

申请日：2016-12-20

Applicant: LG ELECTRONICS INC.

Inventor： Seokmin SHIN ,  Hanbyul SEO

IPC: H04W64/00 ,  G01S5/02 ,  H04W8/00 ,  H04W24/10 ,  H04W74/08

Abstract: A method for estimating the distance between device-to-device (D2D) terminals in a wireless communication system according to the present specification, carried out by a first D2D terminal, is characterized by comprising the steps of: receiving, from a second D2D terminal, a particular message comprising first distance information, regarding the differences in distance between the second D2D terminal and at least three reference base stations configured thereby, and second distance information indicating the distances between said at least three reference base stations; measuring the distance to each reference base station; and estimating the distance to the second D2D terminal by means of the measured distance to each reference base station, first distance information and second distance information.

公开(公告)号：US20210211342A1

公开(公告)日：2021-07-08

申请号：US17183780

申请日：2021-02-24

Applicant: LG Electronics Inc.

Inventor： Seunggye HWANG ,  Joonkui AHN ,  Changhwan PARK ,  Suckchel YANG ,  Seokmin SHIN

IPC: H04L27/26 ,  H04W4/70 ,  H04L1/00 ,  H04L5/00 ,  H04L5/14 ,  H04L5/22 ,  H04L12/46

Abstract: One disclosure of the present specification proposes a method for receiving a Narrowband Reference Signal (NRS) by a Narrow band Internet of Things (NB-IoT) device. The method may comprise receiving the NRS on at least one or more orthogonal frequency division multiplexing (OFDM) symbols. The one or more OFDM symbols are in a time division duplex (TDD) subframe. If the TDD subframe corresponds to a TDD special subframe, the one or more OFDM symbols for receiving the NRS is determined based on which TDD special subframe configuration index among a plurality of TDD special configuration indexes is used by the TDD special subframe.

公开(公告)号：US20210105832A1

公开(公告)日：2021-04-08

申请号：US17124150

申请日：2020-12-16

Applicant: LG ELECTRONICS INC.

Inventor： Seokmin SHIN ,  Changhwan PARK ,  Jaehyung KIM ,  Joonkui AHN ,  Suckchel YANG ,  Seunggye HWANG

IPC: H04W74/08 ,  H04W74/00 ,  H04W16/14

Abstract: This specification provides a method for transmitting an NPRACH preamble in a wireless communication system supporting TDD. More specifically, the method performed by the UE includes: receiving, from a base station, NPRACH configuration information including control information for a repetition number of NPRACH preambles including symbol groups through a higher layer signaling; and transmitting, to the base station, the NPRACH preamble repeatedly through frequency hopping of a symbol group based on the NPRACH configuration information, in which a frequency location of the symbol group is determined based on a first parameter related to a start subcarrier and a second parameter related to the frequency hopping.

公开(公告)号：US20200267675A1

公开(公告)日：2020-08-20

申请号：US16868130

申请日：2020-05-06

Applicant: LG ELECTRONICS INC.

Inventor： Hyunsoo KO ,  Seokmin SHIN ,  Bonghoe KIM ,  Yunjung YI

IPC: H04W56/00 ,  H04L5/00 ,  H04J13/00 ,  H04W72/04 ,  H04W48/16 ,  H04L27/26

Abstract: A method and apparatus for transmitting and receiving narrowband (NB) synchronization signals. A base station transmits an NB secondary synchronization signal (SSS) indicating N NB cell identities assigned for NB Internet of Things (IoT) operation, a specific sequence generated by multiplying a base sequence with a cover sequence in element units is used for the NB SSS, wherein the base sequence is generated through a second Zadoff-Chu sequence having a length corresponding to a largest prime number less than a length L in a frequency domain, and the specific sequence is divisionally mapped to and transmitted in a plurality of orthogonal frequency division multiplexing (OFDM) symbols in elements each having a length M.

公开(公告)号：US20200221481A1

公开(公告)日：2020-07-09

申请号：US16638032

申请日：2018-08-10

Applicant: LG Electronics Inc.

Inventor： Changhwan PARK ,  Seonwook KIM ,  Seokmin SHIN ,  Joonkui AHN ,  Suckchel YANG ,  Seunggye HWANG

IPC: H04W72/12 ,  H04W72/04 ,  H04W4/80

Abstract: The present invention relates to a wireless communication system, and specifically, to a method and a device therefor, the method comprising the steps of: repeatedly receiving a PDCCH including scheduling information, wherein the scheduling information includes time delay information; and repeatedly transmitting a PUSCH indicated by the scheduling information, after a time point indicated by the time delay information from the time point when the repeated receiving of the PDCCH ends, wherein a time resource in a time region includes a fixed DL time unit having a transmission direction fixed to a DL, and a time resource includes a fixed uplink (UL) time unit having a transmission direction fixed to a UL, and a floating time unit having a variable transmission direction, and the time point indicated by the time delay information is calculated on the basis of the fixed UL time unit.

公开(公告)号：US20200068619A1

公开(公告)日：2020-02-27

申请号：US16610597

申请日：2018-05-04

Applicant: LG Electronics Inc.

Inventor： Jaehyung KIM ,  Joonkui AHN ,  Suckchel YANG ,  Changhwan PARK ,  Seokmin SHIN ,  Seunggye HWANG

IPC: H04W74/08 ,  H04W74/00

Abstract: The present invention relates to a method for performing a random access procedure in a wireless communication system and a device therefor, the method comprising a step for receiving NPRACH configuration information and a step for transmitting a random access preamble on the basis of the NPRACH configuration information, wherein the NPRACH configuration information includes information indicating whether only a first preamble format is supported, only a second preamble format is supported, or both the first preamble format and the second preamble format are supported. If both the first preamble format and the second preamble format are supported according to the NPRACH configuration information and a specific condition is met, the random access preamble is transmitted using the first preamble format, and, if both the first preamble format and the second preamble format are supported according to the NPRACH configuration information and the specific condition is not met, the random access preamble is transmitted using the second preamble format.