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公开(公告)号：FR2788393B1
公开(公告)日：2007-04-06
申请号：FR9915341
申请日：1999-12-06
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： KIM KI CHUL , 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：AT539513T
公开(公告)日：2012-01-15
申请号：AT10160271
申请日：2008-07-18
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： CHANG KAP SEOK , KIM IL GYU , PARK HYEONG GEUN , KO YOUNG JO , YI HYO SEOK , JEONG CHAN BOK , KIM YOUNG HOON , BANG SEUNG CHAN
Abstract: The present invention proposes a method of generating a downlink frame including a primary synchronization signal and secondary synchronization signals with which interference between sectors can be reduced so as to improve the performance for searching cells. The method comprises the steps of generating a first short sequence and a second short sequence, generating a first scrambling sequence and a second scrambling sequence by the primary synchronization signal, generating a third scrambling sequence determined by a short sequence group to which the first short sequence is assigned and a fourth scrambling sequence determined by a short sequence group to which the second short sequence is assigned, scrambling the first short sequence with the first scrambling sequence and scrambling the second short sequence with the second scrambling sequence and the third scrambling sequence, scrambling the second short sequence with the first scrambling sequence and scrambling the first short sequence with the second scrambling sequence and the fourth scrambling sequence, and mapping the secondary synchronization signal that including the scambled short sequences and the fourth to a frequency domain.
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公开(公告)号：AT524888T
公开(公告)日：2011-09-15
申请号：AT08778753
申请日：2008-07-11
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： CHANG KAP SEOK , KIM IL GYU , PARK HYEONG GEUN , KO YOUNG JO , YI HYO SEOK , LEE MOON SIK , KIM YOUNG HOON , BANG SEUNG CHAN
Abstract: The present invention relates to a method of searching for a cell by a mobile station in a wireless communication system, wherein the wireless communication system uses a plurality of short sequences grouped into a plurality of short sequence groups, the method comprising: receiving a downlink frame including a primary synchronization signal and a secondary synchronization signal, wherein the secondary synchronization signal contains cell identity group information and the primary synchronization signal contains cell identity information within a cell identity group; and searching for a cell using the cell identity group information in the secondary synchronization signal and the cell identity information in the primary synchronization signal, wherein the secondary synchronization signal comprises a first short sequence and a second short sequence, the first short sequence is scrambled with a first scrambling sequence, and the second short sequence is scrambled with a second scrambling sequence, wherein the first scrambling sequence is determined based on the cell identity information contained in the primary synchronization signal, and the second scrambling sequence is determined based on a short sequence group to which the first short sequence is assigned, the short sequence group being determined based on a remainder of dividing an index of the first short sequence by 8.
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公开(公告)号：DE602008003424D1
公开(公告)日：2010-12-23
申请号：DE602008003424
申请日：2008-07-18
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： CHANG KAP SEOK , KIM IL GYU , PARK HYEONG GEUN , KO YOUNG JO , YI HYO SEOK , JEONG CHAN BOK , KIM YOUNG HOON , BANG SEUNG CHAN
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公开(公告)号：AT488067T
公开(公告)日：2010-11-15
申请号：AT08778879
申请日：2008-07-18
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： CHANG KAP SEOK , KIM IL GYU , PARK HYEONG GEUN , KO YOUNG JO , YI HYO SEOK , JEONG CHAN BOK , KIM YOUNG HOON , BANG SEUNG CHAN
Abstract: The present invention proposes a method of generating a downlink frame including a primary synchronization signal and secondary synchronization signals with which interference between sectors can be reduced so as to improve the performance for searching cells. The method comprises the steps of generating a first short sequence and a second short sequence, generating a first scrambling sequence and a second scrambling sequence by the primary synchronization signal, generating a third scrambling sequence determined by a short sequence group to which the first short sequence is assigned and a fourth scrambling sequence determined by a short sequence group to which the second short sequence is assigned, scrambling the first short sequence with the first scrambling sequence and scrambling the second short sequence with the second scrambling sequence and the third scrambling sequence, scrambling the second short sequence with the first scrambling sequence and scrambling the first short sequence with the second scrambling sequence and the fourth scrambling sequence, and mapping the secondary synchronization signal that including the scambled short sequences and the fourth to a frequency domain.
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Patent Agency Ranking
公开(公告)号：FR2788393A1
公开(公告)日：2000-07-13
申请号：FR9915341
申请日：1999-12-06
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： KIM KI CHUL , BANG SEUNG CHAN , SHIM JAE RYONG , HAN KI CHUL
Abstract: The common channel direct access code division multiplexed access system has multiple terminals (100) transmitting digital words to a base post (200) using a communications channel. The base post receives digital word signals with front end codes, which are not address related, being selected by each of the multiple terminals. The base post searches all possible front end codes, to acquire the signal. If the base post acquires the front end code the terminal transmits the digital words, otherwise re transmitting the front end code.
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公开(公告)号：BRPI0807393A2
公开(公告)日：2014-05-20
申请号：BRPI0807393
申请日：2008-07-11
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： CHANG KAP SEOK , KIM IL GYU , PARK HYEONG GEUN , KO YOUNG JO , YI HYO SEOK , LEE MOON SIK , KIM YOUNG HOON , BANG SEUNG CHAN
Abstract: The present invention relates to a method of searching for a cell by a mobile station in a wireless communication system, wherein the wireless communication system uses a plurality of short sequences grouped into a plurality of short sequence groups, the method comprising: receiving a downlink frame including a primary synchronization signal and a secondary synchronization signal, wherein the secondary synchronization signal contains cell identity group information and the primary synchronization signal contains cell identity information within a cell identity group; and searching for a cell using the cell identity group information in the secondary synchronization signal and the cell identity information in the primary synchronization signal, wherein the secondary synchronization signal comprises a first short sequence and a second short sequence, the first short sequence is scrambled with a first scrambling sequence, and the second short sequence is scrambled with a second scrambling sequence, wherein the first scrambling sequence is determined based on the cell identity information contained in the primary synchronization signal, and the second scrambling sequence is determined based on a short sequence group to which the first short sequence is assigned, the short sequence group being determined based on a remainder of dividing an index of the first short sequence by 8.
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公开(公告)号：ES2417882T3
公开(公告)日：2013-08-09
申请号：ES11161138
申请日：2008-07-11
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： CHANG KAP SEOK , KIM IL GYU , PARK HYEONG GEUN , KO YOUNG JO , YI HYO SEOK , LEE MOON SIK , KIM YOUNG HOON , BANG SEUNG CHAN
Abstract: Un procedimiento para buscar una célula mediante una estación móvil, comprendiendo el procedimiento: recibir una trama de enlace descendente que incluye una primera señal de sincronización y una segunda señal de sincronización; e identificar una célula utilizando la primera señal de sincronización y la segunda señal de sincronización; en el que la segunda señal de sincronización incluye una primera secuencia corta (w0) aleatorizada con una primera secuencia de aleatorización (Pj, 1) y una segunda secuencia corta (w1) aleatorizada con una segunda secuencia de aleatorización (Sw0), la primera secuencia de aleatorización (Pj, 1) se determina por la primera señal de sincronización, la segunda secuencia de aleatorización (Sw0) se determina por la primera secuencia corta (w0), y la primera y la segunda secuencias cortas (w0, w1) indican información de grupo de célula.
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公开(公告)号：AT524887T
公开(公告)日：2011-09-15
申请号：AT08778751
申请日：2008-07-11
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： CHANG KAP SEOK , KIM IL GYU , PARK HYEONG GEUN , KO YOUNG JO , YI HYO SEOK , LEE MOON SIK , KIM YOUNG HOON , BANG SEUNG CHAN
Abstract: The present invention relates to a method of searching for a cell by a mobile station in a wireless communication system, wherein the wireless communication system uses a plurality of short sequences grouped into a plurality of short sequence groups, the method comprising: receiving a downlink frame including a primary synchronization signal and a secondary synchronization signal, wherein the secondary synchronization signal contains cell identity group information and the primary synchronization signal contains cell identity information within a cell identity group; and searching for a cell using the cell identity group information in the secondary synchronization signal and the cell identity information in the primary synchronization signal, wherein the secondary synchronization signal comprises a first short sequence and a second short sequence, the first short sequence is scrambled with a first scrambling sequence, and the second short sequence is scrambled with a second scrambling sequence, wherein the first scrambling sequence is determined based on the cell identity information contained in the primary synchronization signal, and the second scrambling sequence is determined based on a short sequence group to which the first short sequence is assigned, the short sequence group being determined based on a remainder of dividing an index of the first short sequence by 8.
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20.发明专利
公开(公告)号：ES2357181T3
公开(公告)日：2011-04-19
申请号：ES08778878
申请日：2008-07-18
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： CHANG KAP SEOK , KIM IL GYU , PARK HYEONG GEUN , KO YOUNG JO , YI HYO SEOK , JEONG CHAN BOK , KIM YOUNG HOON , BANG SEUNG CHAN
Abstract: Un procedimiento de generación de una trama de enlace de bajada (110) que incluye una señal de sincronización primaria y señales de sincronización secundarias, que comprende: generar una primera secuencia corta y una segunda secuencia corta que indican información de grupo de celdas;generar una primera secuencia de cifrado y una segunda secuencia de cifrado determinadas por la señal de sincronización primaria; generar una tercera secuencia de cifrado determinada por la primera secuencia corta y una cuarta secuencia de cifrado determinada por la segunda secuencia corta; cifrar la primera secuencia corta con la primera secuencia de cifrado y cifrar la segunda secuencia corta con la segunda secuencia de cifrado y la tercera secuencia de cifrado; cifrar la segunda secuencia corta con la primera secuencia de cifrado y cifrar la primera secuencia corta con la segunda secuencia de cifrado y la cuarta secuencia de cifrado; y mapear la señal de sincronización secundaria que incluye la primera secuencia corta cifrada con la primera secuencia de cifrado, la segunda secuencia corta cifrada con la segunda secuencia de cifrado y la tercera secuencia de cifrado, la segunda secuencia corta cifrada con la primera secuencia de cifrado y la primera secuencia corta cifrada con la segunda secuencia de cifrado y la cuarta secuencia de cifrado en un dominio de frecuencia.
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