公开(公告)号：BRPI0812566A2

公开(公告)日：2012-12-25

申请号：BRPI0812566

申请日：2008-06-23

Applicant: KOREA ELECTRONICS TELECOMM ,  KT CORP

Inventor： KO YOUNG-JO ,  PARK HYEONG-GEUN ,  KIM IL-GYU ,  CHANG KAPSEOK ,  YI HYOSEOK ,  KIM YOUNG-HOON ,  BANG SEUNG-CHAN

IPC: H04L1/12

Abstract: When a plurality of terminals share the same resources in a wireless communication system, and when control information such as acknowledgement/negative acknowledgement (ACK/NAK) information or scheduling information is transmitted, a method of efficiently performing code division multiplexing (CDM) is required to distinguish the plurality of terminals. In particular, it is necessary to develop a method by which a code sequence of CDM can be selected and used according to each cell condition. Provided is a method of forming a signal in a wireless communication system in which a plurality of terminals commonly share frequency and time resources. The method includes the operations of receiving condition information in a cell; selecting one of a plurality of time domain orthogonal sequences having different lengths, according to the condition information; and allocating the selected time domain orthogonal sequence to a control signal symbol block.

公开(公告)号：CA2642017C

公开(公告)日：2012-09-18

申请号：CA2642017

申请日：2007-07-25

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： KIM IL-GYU ,  PARK HYEONG-GEUN ,  KO YOUNG-JO ,  CHANG KAPSEOK ,  YI HYOSEOK ,  KIM YOUNG-HOON ,  BANG SEUNG-CHAN

IPC: H04L7/10

Abstract: In a cellular system in which OFDM is used, a forward link synchronization channel, a common pilot channel structure, an initial cell searching method of a mobile station, and an adjacent cell searching method for handover are required. A method of transmitting a forward synchronization signal in a wireless communication system according to the present invention includes generating a frame comprised of a plurality of sync blocks; and transmitting the frame through a forward link, wherein the frame comprises primary synchronization channel sequences which provide timing information of the sync blocks and a plurality of secondary synchronization channel sequences which provide timing information of the frame, wherein a cell identifier is specified by a combination of the primary synchronization channel sequence and a hopping code word specified by the plurality of the secondary synchronization channel sequences Therefore, the cell searching time can be efficiently reduced in an OFDM system.

公开(公告)号：BRPI0706535A2

公开(公告)日：2011-03-29

申请号：BRPI0706535

申请日：2007-05-30

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： CHANG KAP-SEOK ,  KIM IL-GYU ,  KIM NAM-IL ,  PARK HYEONG-GEUN ,  KIM YOUNG-HOON ,  BANG SEUNG-CHAN

IPC: H04B7/26

Abstract: An apparatus for generating a downlink signal and a cell search apparatus are disclosed. An apparatus for generating a downlink signal generates a downlink signal by one unique cell identification code group and a plurality of frame synchronization identification sequences, generates a downlink signal by a plurality of unique cell identification code groups and a plurality of frame synchronization identification sequences, or generates a downlink signal by a plurality of unique cell identification code groups and one frame synchronization identification sequence. A cell search apparatus obtains frame synchronization and identifies cells through a frame synchronization identification sequence and a unique cell identification code group.

公开(公告)号：EP1946461A4

公开(公告)日：2013-08-14

申请号：EP06812526

申请日：2006-11-10

Applicant: KOREA ELECTRONICS TELECOMM ,  SK TELECOM CO LTD ,  KT CORP

Inventor： KIM IL-GYU ,  PARK HYEONG-GEUN ,  KIM NAM-IL ,  CHANG KAP-SEOK ,  KIM YOUNG-HOON ,  BANG SEUNG-CHAN

IPC: H04J11/00 ,  H04J13/00

CPC classification number: H04J11/0069 ,  H04J13/0066 ,  H04J13/0074 ,  H04L5/0016 ,  H04L5/0048 ,  H04L25/0226 ,  H04L27/2613 ,  H04L27/2655 ,  H04L27/2656 ,  H04L27/2657 ,  H04L27/2662

Abstract: Provided are a cell search method, a forward link frame transmission method, an apparatus using the methods, and a forward link frame structure. The cell search apparatus includes a sync acquirer acquiring synchronization of sync channel symbols using a sync channel of a forward link, and a group detector detecting at least one hopping codeword element belonging to a hopping codeword of a target cell from a forward link signal containing sync channel symbols sequence-hopped using a hopping codeword corresponding to a code group to which a scrambling code of each cell belongs based on the acquired synchronization, and detecting a code group of the target cell based on the detected hopping codeword element, wherein the hopping codewords are orthogonal to a cyclic shift operation. Accordingly, a cell search time and the complexity of the cell search can be reduced.

公开(公告)号：EP2115989A4

公开(公告)日：2012-08-01

申请号：EP08704597

申请日：2008-01-04

Applicant: KOREA ELECTRONICS TELECOMM ,  SAMSUNG ELECTRONICS CO LTD

Inventor： LEE MOON-SIK ,  JWA HYE-KYUNG ,  YI HYOSEOK ,  KIM YOUNG-HOON ,  BANG SEUNG-CHAN

IPC: H04L27/26

CPC classification number: H04L27/2607 ,  H04L69/323 ,  H04W74/006

公开(公告)号：EP2156598A4

公开(公告)日：2014-07-02

申请号：EP08766322

申请日：2008-06-13

Applicant: KOREA ELECTRONICS TELECOMM ,  SAMSUNG ELECTRONICS CO LTD

Inventor： KIM IL-GYU ,  PARK HYEONG-GEUN ,  KO YOUNG-JO ,  CHANG KAPSEOK ,  YI HYOSEOK ,  KIM YOUNG-HOON ,  BANG SEUNG-CHAN

IPC: H04L1/16 ,  H04B7/04 ,  H04L1/18 ,  H04L5/00

CPC classification number: H04W72/044 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/061 ,  H04B7/0623 ,  H04L1/1692 ,  H04L1/1812 ,  H04L1/1861 ,  H04L5/0016 ,  H04L5/0023 ,  H04L5/0055 ,  H04L27/18

Abstract: Provided is a method of efficiently transmitting an acknowledgement/negative acknowledgement (ACK/NACK) bit supporting hybrid automatic repeat request (HARQ) in a wireless communication system supporting multi-user multi-input and multi-output (MIMO). The method transmits the same downlink code and in-phase/quadrature (I/Q) multiplexed ACK/NACK bit to two mobile stations using the same uplink resource block. Accordingly, the method can efficiently transmit the ACK/NACK bit for multi-user MIMO and efficiently use downlink radio resources.

公开(公告)号：EP2044720A4

公开(公告)日：2010-09-01

申请号：EP07793239

申请日：2007-07-25

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： KIM IL-GYU ,  PARK HYEONG-GEUN ,  KO YOUNG-JO ,  CHANG KAPSEOK ,  YI HYOSEOK ,  KIM YOUNG-HOON ,  BANG SEUNG-CHAN

IPC: H04L7/10

CPC classification number: H04W56/001 ,  H04J11/0069 ,  H04J11/0093 ,  H04L5/0037 ,  H04L5/005 ,  H04L5/0053 ,  H04L27/2613 ,  H04L27/2655 ,  H04L27/2675 ,  H04W36/0061 ,  H04W36/08 ,  H04W56/00

Abstract: In a cellular system in which OFDM is used, a forward link synchronization channel, a common pilot channel structure, an initial cell searching method of a mobile station, and an adjacent cell searching method for handover are required. A method of transmitting a forward synchronization signal in a wireless communication system according to the present invention includes generating a frame comprised of a plurality of sync blocks; and transmitting the frame through a forward link, wherein the frame comprises primary synchronization channel sequences which provide timing information of the sync blocks and a plurality of secondary synchronization channel sequences which provide timing information of the frame, wherein a cell identifier is specified by a combination of the primary synchronization channel sequence and a hopping code word specified by the plurality of the secondary synchronization channel sequences Therefore, the cell searching time can be efficiently reduced in an OFDM system.

公开(公告)号：EP2186293A4

公开(公告)日：2012-05-23

申请号：EP08793159

申请日：2008-08-08

Applicant: KOREA ELECTRONICS TELECOMM ,  SAMSUNG ELECTRONICS CO LTD

Inventor： KO YOUNG-JO ,  PARK HYEONG-GEUN ,  KIM IL-GYU ,  CHANG KAPSEOK ,  YI HYOSEOK ,  KIM YOUNG-HOON ,  BANG SEUNG-CHAN

IPC: H04L1/16 ,  H04J11/00 ,  H04L5/00

CPC classification number: H04J11/003 ,  H04L1/1861 ,  H04L5/0007 ,  H04L5/0053 ,  H04L27/2607 ,  H04W72/00

公开(公告)号：EP2097994A4

公开(公告)日：2010-12-29

申请号：EP07746762

申请日：2007-05-30

Applicant: KOREA ELECTRONICS TELECOMM ,  SK TELECOM CO LTD ,  KT CORP

Inventor： CHANG KAP-SEOK ,  KIM IL-GYU ,  KIM NAM-IL ,  PARK HYEONG-GEUN ,  KIM YOUNG-HOON ,  BANG SEUNG-CHAN

IPC: H04B7/26 ,  H04J11/00

CPC classification number: H04J11/0079 ,  H04L27/261 ,  H04L27/2613 ,  H04L27/2656 ,  H04L27/2685

公开(公告)号：EP2179556A4

公开(公告)日：2014-12-24

申请号：EP08766564

申请日：2008-06-24

Applicant: KOREA ELECTRONICS TELECOMM ,  SAMSUNG ELECTRONICS CO LTD

Inventor： KIM IL GYU ,  KO YOUNG JO ,  PARK HYEONG GEUN ,  CHANG KAP SEOK ,  YI HYO SEOK ,  KIM YOUNG-HOON ,  BANG SEUNG CHAN ,  LEE KYOUNG JOON

IPC: H04L29/02 ,  H04B1/69 ,  H04J11/00 ,  H04J13/16 ,  H04L27/26 ,  H04W56/00

CPC classification number: H04J11/0069 ,  H04J11/0076 ,  H04J13/16 ,  H04L5/0007 ,  H04L5/0053 ,  H04L27/26 ,  H04L27/261 ,  H04W48/16

Abstract: The present invention relates to a method of generating a downlink frame. The method of generating the downlink frame includes generating a first sequence and a second sequence for identifying cell groups; generating a first scrambling sequence and a second scrambling sequence that are one-to-two mapped to the sequence number of the primary synchronization signal; scrambling the first sequence with the first scrambling sequence and scrambling the second sequence with the second scrambling sequence; and generating a secondary synchronization signal including the scrambled first sequence and second sequence and mapping the secondary synchronization signal to a frequency domain.

Abstract translation: 本发明涉及一种生成下行链路帧的方法。 生成下行链路帧的方法包括生成用于识别小区组的第一序列和第二序列; 产生映射到主同步信号的序列号的一对二的第一加扰序列和第二加扰序列; 用第一加扰序列对第一序列进行加扰，并用第二加扰序列加扰第二序列; 以及生成包括所述加扰的第一序列和第二序列的次同步信号，并将所述次同步信号映射到频域。