公开(公告)号：GB2370725A

公开(公告)日：2002-07-03

申请号：GB0111897

申请日：2001-05-16

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： KIM IL-GYU ,  JEONG JAE-WOOK ,  BANG SEUNG-CHAN

IPC: H04B1/7113 ,  H04Q7/38

Abstract: There is disclosed an optimal search method of DS-CDMA signals consisted of time-multiplexed pilot symbols and control symbols capable of maximizing the performance of a receiver when the signal is searched or SNR is measured and apparatus thereof. Further, the present invention proposes a method of maximizing the performance of a searcher using basically both energy of the pilot symbol and the control symbol wherein coherent integral lengths for two regions are differentiated when the receiver searches the signals, and different weights are given to the two regions when a coherent correlation value is finally non-coherently added, and a method of effectively estimating SNR.

公开(公告)号：ES2417929T3

公开(公告)日：2013-08-09

申请号：ES11170022

申请日：2006-12-22

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

Inventor： KIM JAE-HEUNG ,  RYU BYUNG-HAN ,  BANG SEUNG-CHAN

IPC: H04W52/02 ,  H04W76/04

Abstract: Un método para realizar una operación de recepción discontinua de un terminal (9) en un sistema de comunicación inalámbrica, que comprende: recibir en el terminal (9) parámetros para realizar la operación de recepción discontinua desde la estación (7) base; y realizar en el terminal (9), en un estado en el que el terminal (9) ha establecido un canal de datos para la transmisión/recepción de datos a/desde la estación (7) base, la operación de recepción discontinua basada en los parámetros recibidos, en el que los mensajes desde la estación (7) base se monitorizan de manera discontinua de acuerdo con un ciclo de recepción discontinuo.

公开(公告)号：AT521209T

公开(公告)日：2011-09-15

申请号：AT06835368

申请日：2006-12-22

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

Inventor： KIM JAE-HEUNG ,  RYU BYUNG-HAN ,  BANG SEUNG-CHAN

IPC: H04W52/02 ,  H04W76/04

Abstract: Provided is a method and apparatus for discontinuously transmitting/receiving packets for low- power consumption of a terminal in a cellular system for packet transmission. The present research provides a method and apparatus that can perform a low-power consuming operation when a terminal is in active state in a cellular system. The method for discontinuously transmitting/receiving packet data to reduce power consumption of a terminal in a cellular system, including the steps of : a) establishing discontinuous reception/transmission (DRX/DTX) parameters including discontinuous DRX/DTX cycle information for terminals operating in a transmission suspension mode, which is a sub-state of an active state; and b) performing DRX/DTX based on the DRX/DTX parameters in the terminals operating in the transmission suspension mode.

公开(公告)号：CA2642017A1

公开(公告)日：2008-01-31

申请号：CA2642017

申请日：2007-07-25

Applicant: KOREA ELECTRONICS TELECOMM

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

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：ES2376284T3

公开(公告)日：2012-03-12

申请号：ES10158319

申请日：2006-12-22

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

Inventor： KIM JAE-HEUNG ,  RYU BYUNG-HAN ,  BANG SEUNG-CHAN

IPC: H04W52/02 ,  H04W76/04

Abstract: Un procedimiento para operación de recepción discontinua de un terminal (9) en un sistema de comunicación inalámbrica, que comprende: recepción en el terminal (9), en un estado (3) en el que el terminal (9) ha configurado un canal de datos para transmisión/recepción de datos a/desde una estación base (7), parámetros para realizar la operación de recepción discontinua desde la estación base (7); y realización en el terminal (9) de la operación de recepción discontinua basándose en los parámetros recibidos, en el que los parámetros incluyen información del primer ciclo DRX e información del segundo ciclo DRX, en el que se realiza una operación de recepción discontinua utilizando la información del segundo ciclo DRX si expira una operación de recepción discontinua que usa la información del primer ciclo DRX, en el que el primer ciclo DRX es igual o más corto que el segundo ciclo DRX.

公开(公告)号：DE10059873B4

公开(公告)日：2006-05-18

申请号：DE10059873

申请日：2000-12-01

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： KIM TAE-JOONG ,  KIM JUNG-IM ,  KIM JAE-HEUNG ,  BANG SEUNG-CHAN

IPC: H04J13/00 ,  H04L1/08 ,  H03M13/00 ,  H04B1/707 ,  H04L1/00

Abstract: PURPOSE: A repetitive transceiving device/method of non-memory error correction channel coding are provided to maximumly obtain time diversity of a demodulated symbol, when repetitively transmitting a coded signal through the non-memory error correction channel coding. CONSTITUTION: In a transmitting unit(100), an information generator(110) generates data to be transmitted. A coding unit(120) performs channel coding for the data outputted from the information generator(110) and repeats the channel coded data, to output a symbol to be transmitted. A symbol transmitter(130) receives the symbol to be transmitted, and multiplexes and modulates the symbol with another symbols, for outputting to a receiving unit(200). The receiving unit(200) receives a signal transmitted from the transmitting unit(100), for demodulation, demultiplexing, repetitive restoring, and channel coding, to obtain information.

公开(公告)号：DE10059873A1

公开(公告)日：2001-06-28

申请号：DE10059873

申请日：2000-12-01

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： KIM TAE-JOONG ,  KIM JUNG-IM ,  KIM JAE-HEUNG ,  BANG SEUNG-CHAN

IPC: H04J13/00 ,  H03M13/00 ,  H04B1/707 ,  H04L1/00 ,  H04L1/08

Abstract: The channel coding of data groups to be transmitted, is carried-out in a transmitter (100). The transmitter also performs multiplexing and modulation of data groups to output transmission signal. A receiver (200) demodulates received transmission signal and also performs demultiplexing and channel decoding, to output data signal. An Independent claim is also included for method for repeated transmission and reception of coded symbols.

公开(公告)号：DE10027216A1

公开(公告)日：2001-02-01

申请号：DE10027216

申请日：2000-05-31

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： BANG SEUNG-CHAN ,  KIM TAE-JOONG ,  KIM JAE-HEUNG ,  KIM JUNG-IM ,  CHAE JONG-SUK ,  LEE HYUCK-JAE ,  SHIM JAE-RYONG ,  LEE NARM-HEE

IPC: H04L27/20 ,  H04B1/707 ,  H04J11/00 ,  H04J13/12 ,  H04J13/20 ,  H04J13/02 ,  H04B7/216

公开(公告)号：GB2346779A

公开(公告)日：2000-08-16

申请号：GB9928610

申请日：1999-12-06

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： KIM TAE-JOONG ,  BANG SEUNG-CHAN ,  SHIM JAE-RYONG ,  HAN KI-CHUL

IPC: H04B7/005 ,  H04B7/216 ,  H04J13/00 ,  H04W52/24 ,  H04W52/32 ,  H04W52/50 ,  H04W76/02 ,  H04Q7/38

Abstract: The invention relates to packet and random access in which multiple terminals (eg mobile phones) transmit data via a common code division multiple access (CDMA) Channel Terminals select one of available preamble signatures and one of available access slots and transmit a preamble (Fig.5). A base station tries to acquire the preamble and then broadcasts to all terminals whether the preambles are acquired or not (Fig.6). The terminals then transmit a data or retransmit a preamble according to the result of the preamble acquirement (Fig.5). The apparatus and method have improved network efficiency by reducing unnecessary data transmission and interference signal. An improved characteristic of time delay by ramping to adequate power level more quickly by re-transmitting preamble-by-preamble.

公开(公告)号：BRPI0706360A2

公开(公告)日：2011-03-22

申请号：BRPI0706360

申请日：2007-05-25

Applicant: KOREA ELECTRONICS TELECOMM

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

IPC: H04L27/26

Abstract: The invention provides a method of generating a downlink signal and searching a cell on the basis of the downlink signal in an OFDM-based cellular system. The downlink signal includes a plurality of synchronization blocks each having a plurality of sub-frames, and a synchronization pattern composed of a combination of a cell group identification code for identifying a cell group and a frame synchronization identification code for indicating a frame start point is generated in each of the synchronization blocks. Different frame synchronization identification codes are allocated to the synchronization blocks.