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.