公开(公告)号：US20200068620A1

公开(公告)日：2020-02-27

申请号：US16610610

申请日：2018-05-04

Applicant: LG Electronics Inc.

Inventor： Jaehyung KIM ,  Joonkui AHN ,  Seokmin SHIN ,  Seunggye HWANG

IPC: H04W74/08 ,  H04W74/00 ,  H04W72/04 ,  H04L5/00

Abstract: The present invention relates to a method for performing a random access process in a wireless communication system, and a device therefor, and relates to a method and a device therefor, the method comprising the steps of: receiving, from a base station, narrowband physical random access channel (NPRACH) configuration information; and repeatedly transmitting an NPRACH preamble on the basis of the received NPRACH configuration information, wherein, if a time gap between a completion time point of the last repeated transmission of the NPRACH preamble and a next subframe is smaller than a guard time, the last repeated transmission of the NPRACH preamble is dropped, or is punctured as much as the difference between the guard time and the time gap in the last repeated transmission of the NPRACH preamble.

公开(公告)号：US20200015285A1

公开(公告)日：2020-01-09

申请号：US16578106

申请日：2019-09-20

Applicant: LG Electronics Inc.

Inventor： Seokmin SHIN ,  Changhwan PARK ,  Seonwook KIM ,  Joonkui AHN ,  Daesung HWANG

IPC: H04W74/08 ,  H04W74/00

Abstract: Disclosed are a method for transmitting a random access preamble in a wireless communication system supporting a narrowband-Internet of things (NB-IoT) and an apparatus therefor. Specifically, the method performed by the terminal may include: receiving, from a base station, first configuration information for a first random access preamble and second configuration information for a second random access preamble; transmitting, to the base station, the first random access preamble by using the first configuration information; and transmitting, to the base station, the second random access preamble based on the second configuration information, when transmission of the first random access preamble satisfies a predetermined criterion, in which any one of the first random access preamble and the second random access preamble may be generated based on a sequence in which all elements are not configured to 1.

公开(公告)号：US20200008036A1

公开(公告)日：2020-01-02

申请号：US16570759

申请日：2019-09-13

Applicant: LG Electronics Inc.

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

IPC: H04W4/80 ,  H04W72/04 ,  H04L5/00 ,  H04L5/14

Abstract: One disclosure of the present specification provides a method for receiving a downlink physical channel by a narrowband Internet of things (NB-IoT) device. The method may comprise the steps of: determining whether to receive a signal of a downlink physical channel from an NB-IoT cell, on a downlink pilot time slot (DwPTS) of a time division duplex (TDD) special subframe; and receiving the signal of the downlink physical channel on the TDD special subframe including the DwPTS, on the basis of the determination.

公开(公告)号：US20190373646A1

公开(公告)日：2019-12-05

申请号：US16541879

申请日：2019-08-15

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：US20190166571A1

公开(公告)日：2019-05-30

申请号：US15508463

申请日：2016-11-07

Applicant: LG ELECTRONICS INC.

Inventor： Seokmin SHIN ,  Hyunsoo KO ,  Yunjung YI ,  Kunil YUM

IPC: H04W56/00 ,  H04L5/00 ,  H04W72/04

CPC classification number: H04W56/0015 ,  H04L5/00 ,  H04L5/001 ,  H04L5/0048 ,  H04L5/0091 ,  H04L5/0098 ,  H04L67/12 ,  H04W72/042

Abstract: A method for receiving system information in a wireless communication system supporting a Narrow Band (NB)-Internet of Things (IoT), the method performed by a terminal comprising: receiving a narrowband synchronization signal (NBSS) through a narrowband (NB) from a base station; acquiring, based on the NBSS, time synchronization and frequency synchronization with the base station; and receiving the system information related to the NB-IoT through a narrowband physical broadcast channel (N-PBCH) from the base station, wherein the system information includes at least one of operation mode information indicating an operation mode of an NB-IoT system or control information indicating an index of a legacy CRS (cell-specific reference signal) sequence, and wherein the control information is associated with a PRB (physical resource block) index of a PRB to which the legacy CRS is transmitted.

公开(公告)号：US20180294910A1

公开(公告)日：2018-10-11

申请号：US15765236

申请日：2016-10-04

Applicant: LG ELECTRONICS INC.

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

IPC: H04J11/00 ,  H04L27/26 ,  H04L5/00

CPC classification number: H04J11/0076 ,  H04J11/0063 ,  H04J13/0062 ,  H04J2011/0016 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0051 ,  H04L27/2613 ,  H04L27/266 ,  H04L27/2691 ,  H04L27/2692

Abstract: The present invention provides a method and devices for transmitting and receiving a synchronization signal and a method for generating a synchronization signal in a wireless access system supporting NB-IoT. A method for transmitting a narrowband secondary synchronization signal (N-SSS) by a base station in a wireless access system supporting NB-IoT, according to an embodiment of the present invention, can comprise the steps of: generating a first sequence having a size M so as to generate an N-SSS; generating a second sequence having a size M so as to generate an N-SSS; generating an N-SSS by means of the first sequence and second sequence; and transmitting the N-SSS by means of n OFDM symbols. The size of a bandwidth used in the wireless access system supporting NB-IoT is the size of one physical resource block (PRB), and one PRB can comprise twelve subcarriers in a frequency domain.

公开(公告)号：US20180249433A1

公开(公告)日：2018-08-30

申请号：US15755220

申请日：2016-09-02

Applicant: LG Electronics Inc.

Inventor： Seokmin SHIN ,  Yunjung YI

IPC: H04W56/00 ,  H04W72/04

CPC classification number: H04W56/0005 ,  H04L5/0005 ,  H04L5/0048 ,  H04L27/0014 ,  H04L27/2607 ,  H04L27/2613 ,  H04L27/2692 ,  H04W72/0446

Abstract: The present specification provides a method for transmitting and receiving a synchronization signal by a terminal in a wireless communication system, the method comprising the steps of: receiving broadcast information through a predetermined frame from a base station, wherein the predetermined frame is a frame defined for transmitting and receiving a signal in a narrow band (NB) and includes at least one first subframe; and receiving the synchronization signal from the base station through one or more first subframes on the basis of the received broadcasting information.

公开(公告)号：US20170223652A1

公开(公告)日：2017-08-03

申请号：US15414559

申请日：2017-01-24

Applicant: LG ELECTRONICS INC.

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

IPC: H04W56/00 ,  H04L29/06

CPC classification number: H04W56/0035 ,  H04B2001/70935 ,  H04J13/0062 ,  H04L5/0053 ,  H04L27/2601 ,  H04L27/2613 ,  H04L67/12 ,  H04L69/22

Abstract: This closure relates to narrowband communication supporting an Internet of Things (IoT) service in a next-generation wireless communication system and, more particularly, to a method and apparatus for transmitting and receiving narrowband synchronization signals. A base station transmits a narrowband secondary synchronization signal indicating a narrowband cell identity, a specific sequence generated by performing phase rotation with respect to a base sequence generated through a second Zadoff-Chu sequence having a predetermined length L in a frequency domain and multiplying the base sequence by a cover sequence in element units is used for the narrowband secondary synchronization signal, and a specific root index is selected from among M (M

公开(公告)号：US20170223650A1

公开(公告)日：2017-08-03

申请号：US15419978

申请日：2017-01-30

Applicant: LG ELECTRONICS INC.

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

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

CPC classification number: H04W56/0015 ,  H04J13/0062 ,  H04L5/0007 ,  H04L5/0053 ,  H04L27/2601 ,  H04L27/2613 ,  H04W48/16 ,  H04W72/042

Abstract: This closure relates to narrowband communication supporting an Internet of Things (IoT) service in a next-generation wireless communication system and, more particularly, to a method and apparatus for transmitting and receiving narrowband synchronization signals. A base station repeats a Zadoff-Chu sequence on each of multiple OFDM symbols; multiplies each component of a cover sequence, having a length corresponding to a number of the multiple OFDM symbols, to all the components of the Zadoff-Chu sequence on each of the multiple OFDM symbols. Then, the base station transmits the NB PSS by using the Zadoff-Chu sequence multiplied by the cover sequence to the one or more UEs.

公开(公告)号：US20170223649A1

公开(公告)日：2017-08-03

申请号：US15402933

申请日：2017-01-10

Applicant: LG ELECTRONICS INC.

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

IPC: H04W56/00 ,  H04L5/00 ,  H04J13/00

CPC classification number: H04W56/0015 ,  H04J13/0062 ,  H04L5/0007 ,  H04L5/0053 ,  H04L27/2601 ,  H04L27/2613 ,  H04W48/16 ,  H04W72/042

Abstract: This closure relates to narrowband communication supporting an Internet of Things (IoT) service in a next-generation wireless communication system and, more particularly, to a method and apparatus for transmitting and receiving narrowband 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.