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公开(公告)号：GB2352944B
公开(公告)日：2004-02-11
申请号：GB0013114
申请日：2000-05-31
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： LEE HYUCK-JAE , KIM JAE-HEUNG , SHIM JAE RYONG , CHAE JONG-SUK , KIM JUNG-IM , LEE NARM-HEE , BANG SEUNG-CHAN , KIM TAE-JOONG
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22.发明专利
公开(公告)号：GB2346779B
公开(公告)日：2004-01-07
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
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.
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公开(公告)号：GB2352944A
公开(公告)日：2001-02-07
申请号：GB0013114
申请日：2000-05-31
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： LEE HYUCK-JAE , KIM JAE-HEUNG , SHIM JAE RYONG , CHAE JONG-SUK , KIM JUNG-IM , LEE NARM-HEE , BANG SEUNG-CHAN , KIM TAE-JOONG
Abstract: The present invention relates to an apparatus and method for modulating data by employing orthogonal variable spreading factor (OVSF) codes in a mobile communication system. A code generating means generates at least one spreading code to be allocated to a channel and is selected such that two consecutive pairs of in-phase (I) and quadrature (Q) data correspond to two points located on the same point in the phase domain (see figure) or are symmetrical with respect to the zero point (see fig. 9) . Data for transmission is then spread using the generated code and phase rotated by a Walsh rotator such that the phase difference between consecutive points is ninety degrees (90{). The ninety degree phase difference leads to a reduction in the peak to average power ratio (PAPR) of a mobile station. Preferably the orthogonal complex quadrature phase shift keying (OCQPSK) modulation scheme is adopted.
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公开(公告)号：BRPI0823509A2
公开(公告)日：2015-06-09
申请号：BRPI0823509
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: Métodos e equipamento terminal para transmitir informações de controle de uplink e recebê-las em estação de base terminal. Quando uma pluralidade de terminais compartilha os mesmos recursos num sistema de comunicações sem fio e quando controlam informações tais como informações de recebimento/confirmação negativa (ack/nak) ou são transmitidas informações de programação, é exigido realizar eficientemente um método de multiplexação de divisão de código (cdm) para distinguir a pluralidade determinais. Em particular, é necessário desenvolver um método pelo qual possa ser selecionada e usada uma seqúéneia de códigos de cdm de acordo com cada condição de célula. É proporcionado um método deformação de um sinal num sistema de comunicações sem fio em que uma pluralidade de terminais comumente compartilha recursos de frequência e de tempo. O método inclui as operações de recebimento de informações de condição numa célula; selecionar uma de uma pluralidade de seqúências ortogonais de domínio de tempo tendo comprimentos diferentes, de acordo com as informações de condição; e alocar a seqüência ortogonal de domínio de tempo selecionada para um bloco de símbolos de sinal de controle.
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公开(公告)号：ES2413063T3
公开(公告)日：2013-07-15
申请号：ES11169559
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
Abstract: Un método para realizar una operación de recepción discontinua de un terminal (9) en un sistema decomunicación inalámbrica, que comprende: recibir en el terminal (9) parámetros para realizar la operación de recepción discontinua desde la estación(7) base, en el que los parámetros incluyen información para uno o más ciclos de repetición discontinua;realizar en el terminal (9), en un estado en el que el terminal (9) ha establecido un canal de datos para latransmisión/recepción de datos a/desde la estación (7) base, la operación de recepción discontinuabasada en los parámetros recibidos, cuando la transmisión de enlace ascendente es necesaria, iniciar la transmisión de enlace ascendenteusando acceso aleatorio si no hay sincronización de enlace ascendente.
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Patent Agency Ranking
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.
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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.
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公开(公告)号：AT533325T
公开(公告)日：2011-11-15
申请号：AT10158319
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
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.
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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.
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公开(公告)号：DE10027216B4
公开(公告)日：2008-10-16
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
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