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公开(公告)号：DE602004028180D1
公开(公告)日：2010-08-26
申请号：DE602004028180
申请日：2004-12-27
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： KIM BYOUNG-HAK , LEE HO-JIN , KIM HO-KYOM , OH DEOCK-GIL
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公开(公告)号：DE602004025786D1
公开(公告)日：2010-04-15
申请号：DE602004025786
申请日：2004-08-06
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： LEE HO-JIN , OH DEOCK-GIL , LEE KI-DONG , KIM HO-KYOM
Abstract: A method for controlling data transmission rate in order to save waste of resources due to Non-Line Of Sight (NLOS) region when a mobile terminal passes through the NLOS region in an interactive satellite communication system is disclosed. The method includes the steps of setting at least one threshold; at a Network Control Center (NCC) adjusting allocated resources based on the Constant Resources Allocation (CRA) after detecting whether Satellite Access Control is lost or not; compensating transmission delay by reallocating if the mobile terminal returns from the NLOS region within a first threshold duration, wherein the mobile terminal maintains the fine sync state during the first threshold duration; and deallocating all resources allocated based on the CRA if the mobile terminal does not return from the NLOS region within the first threshold duration.
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公开(公告)号：DE60329158D1
公开(公告)日：2009-10-22
申请号：DE60329158
申请日：2003-12-22
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： RYU JOON-GYU , JEONG HOON , LEE HO-JIN , OH DEOCK-GIL
Abstract: Disclosed is a frequency hopping system for converting frequencies of signals into RF (radio frequency) signals, which comprises: a frequency hopper (200) for outputting signals with temporarily varied frequencies according to a predetermined pattern; a fixed PLL (phase locked loop) unit (500) for outputting frequency-fixed signals; a mixer (400) for mixing the output signals of the frequency hopper and the fixed PLL unit, and outputting frequency-hopped local signals; and a modulator (100) for receiving I and Q (in-phase and quadrature-phase) signals from a baseband device, synthesizing the I and Q signals with the frequency-hopped local signals, combining the two synthesized signals, and outputting RF signals.
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公开(公告)号：AU2003288782A1
公开(公告)日：2004-09-17
申请号：AU2003288782
申请日：2003-12-30
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： KIM SOOYOUNG , OH DEOCK-GIL , KIM JAE-MOUNG
Abstract: The rate compatible code is formed by forming an m dimensional product code by using a systematic block code in a predetermined number of axes: The m dimensional product code is divided into an information block and 2m-1 parity blocks. Indices are allocated to the divided blocks of the information block and 2m-1 parity blocks. Combinations of the information block and corresponding parity blocks adjacent to the information block are obtained. A first weighting factor w1 for the combinations is estimated and saved. Another parity block adjacent to the saved combination is found and a new combination is formed. The first weighting factor w1 for the new combination is estimated. If there are combinations having the same first weighting factor w1, a second weighting factor w2 for the combinations is estimated and the combinations having a smaller value of w2 are neglected. Rate compatible having the combinations are formed.
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公开(公告)号：AT474389T
公开(公告)日：2010-07-15
申请号：AT07124129
申请日：2004-12-27
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： KIM BYOUNG-HAK , LEE HO-JIN , KIM HO-KYOM , OH DEOCK-GIL
Abstract: A reference clock recovery apparatus is provided and includes a tuning unit for receiving a modulated signal and converting the modulated signal into a digital value; a first frequency difference detecting unit for detecting a frequency difference between the central station and a terminal; first and second filtering unit for smoothing the frequency difference; a second frequency difference detecting unit for causing the terminal to maintain a synchronization to the cl.ock of the central station; a switching unit for selecting an operation of the first frequency difference detecting unit or an operation of the second frequency difference detecting unit; an digital-to-analog converting unit for converting a digital signal into an analog signal; an oscillating unit for receiving an output of the digital-to-analog converting unit and outputting a desired frequency; a counting unit for counting the clocks and outputting the count value; and a transmitting unit for transmits the timing information.
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Patent Agency Ranking
公开(公告)号：GB2433179B
公开(公告)日：2010-05-19
申请号：GB0624657
申请日：2006-12-11
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： KIM BYOUNG-HAK , OH DEOCK-GIL , LEE HO-JIN , RYU JOON-GYU
IPC: H04B7/185
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公开(公告)号：DE102011056664A1
公开(公告)日：2012-06-21
申请号：DE102011056664
申请日：2011-12-20
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： HONG HYUAN HA , OH DEOCK-GIL
Abstract: Es werden ein Verfahren zur Steuerung einer Übergabe und ein Verfahren zur Erkennung von Paketverlust bereitgestellt. Ein Return-Link-Encapsulation(RLE)basiertes Auslösesignal, das anzeigt, ob Paketverlust vorkommt, während sich ein mobiles Satelliten-Endgerät zwischen Netzen bewegt, kann als ein Referenzsignal zum Starten einer Übergabe verwendet werden, wodurch ein für Erkennung von Mobilität verwendeter Zeitbetrag verkleinert werden kann und eine Diensttrennung auch in einem Regenabschwächungsabschnitt, in dem ein Standort häufig geändert wird, verhindert werden kann.
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公开(公告)号：AT460015T
公开(公告)日：2010-03-15
申请号：AT04254767
申请日：2004-08-06
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： LEE HO-JIN , OH DEOCK-GIL , LEE KI-DONG , KIM HO-KYOM
Abstract: A method for controlling data transmission rate in order to save waste of resources due to Non-Line Of Sight (NLOS) region when a mobile terminal passes through the NLOS region in an interactive satellite communication system is disclosed. The method includes the steps of setting at least one threshold; at a Network Control Center (NCC) adjusting allocated resources based on the Constant Resources Allocation (CRA) after detecting whether Satellite Access Control is lost or not; compensating transmission delay by reallocating if the mobile terminal returns from the NLOS region within a first threshold duration, wherein the mobile terminal maintains the fine sync state during the first threshold duration; and deallocating all resources allocated based on the CRA if the mobile terminal does not return from the NLOS region within the first threshold duration.
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公开(公告)号：AT442707T
公开(公告)日：2009-09-15
申请号：AT03029648
申请日：2003-12-22
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： RYU JOON-GYU , JEONG HOON , LEE HO-JIN , OH DEOCK-GIL
Abstract: Disclosed is a frequency hopping system for converting frequencies of signals into RF (radio frequency) signals, which comprises: a frequency hopper (200) for outputting signals with temporarily varied frequencies according to a predetermined pattern; a fixed PLL (phase locked loop) unit (500) for outputting frequency-fixed signals; a mixer (400) for mixing the output signals of the frequency hopper and the fixed PLL unit, and outputting frequency-hopped local signals; and a modulator (100) for receiving I and Q (in-phase and quadrature-phase) signals from a baseband device, synthesizing the I and Q signals with the frequency-hopped local signals, combining the two synthesized signals, and outputting RF signals.
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公开(公告)号：GB2433179A
公开(公告)日：2007-06-13
申请号：GB0624657
申请日：2006-12-11
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： KIM BYOUNG-HAK , OH DEOCK-GIL , LEE HO-JIN , RYU JOON-GYU
Abstract: In the invention a selector determines whether transmissions from the terminal should be direct to a satellite, or indirectly via a "gap filler" relay, the decision being made by comparing the respective link qualities. As embodied, the terminal has a Ku/Ka band antenna and signals received from the satellite are converted to S-band 303. The converted signals are then monitored 307 for S/N level and compared 308 with the S/N level of S-band signals received from the gap filler. The comparison results controls an RF switch which selects the link with the greater S/N level.
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