公开(公告)号：AT553553T

公开(公告)日：2012-04-15

申请号：AT02788886

申请日：2002-10-21

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： LIM KWANG-JAE ,  KIM SOO-YOUNG

IPC: H04B7/19 ,  H04B7/185 ,  H04B7/216

Abstract: Provided is a method and apparatus for common packet channel access to transmit data packet from a mobile terminal to a satellite access network in a mobile satellite communication system. The method and apparatus of this invention reduces transmission delay time, enhances the probability of successful access, and controls the currently used common packet channel by using a common control channel broadcast by the satellite access network. The method includes the steps of: receiving an access preamble including an access signature code and a collision-detection preamble including a collision-detection signature code, which are transmitted together from a plurality of mobile terminals, and transmitting an acknowledgement to the access preamble and collision-detection preamble to mobile terminals through a preamble acknowledgement channel.

公开(公告)号：AU9607801A

公开(公告)日：2002-05-21

申请号：AU9607801

申请日：2001-10-17

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： LIM KWANG-JAE ,  KIM SOO-YOUNG ,  LEE HO-JIN ,  YOU MOON-HEE

IPC: H04B7/26 ,  H04B7/185 ,  H04L12/56 ,  H04W74/08 ,  H04W84/06

Abstract: The present invention relates to Random Access Channel (RACH) access apparatus for mobile satellite communication system and method therefor. The method for accessing random access channel (RACH) on satellite system, random access channel (RACH) carrying message from a plurality of mobile stations to the satellite system, the method includes the steps of: receiving preamble and the message, the message successively transmitted with the preamble from the plurality of mobile stations; and transmitting acquisition response signal corresponding to the preamble or the message to the plurality of mobile stations. Accordingly, success of packet reception of satellite system is improved and transmission delay is reduced.

公开(公告)号：DE60235638D1

公开(公告)日：2010-04-22

申请号：DE60235638

申请日：2002-10-21

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： CHOI KWON-HUE ,  LIM KWANG-JAE ,  KIM SOO-YOUNG

IPC: H04B7/26 ,  H04B7/185

Abstract: Apparatus and method for closed-loop power control in mobile satellite communication system, which can compensate round trip delay. The apparatus for closed-loop power control includes the means of; a) converting power control order from base earth station into power control step; b) measuring channel change rate from power of pilot channel; c) making tab coefficient using said channel change rate; d) compensating channel change due to loop delay using power control step; and e) renovating received signal power using said power control step.

公开(公告)号：AT460781T

公开(公告)日：2010-03-15

申请号：AT02788887

申请日：2002-10-21

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： CHOI KWON-HUE ,  LIM KWANG-JAE ,  KIM SOO-YOUNG

IPC: H04B7/26 ,  H04B7/185

Abstract: Apparatus and method for closed-loop power control in mobile satellite communication system, which can compensate round trip delay. The apparatus for closed-loop power control includes the means of; a) converting power control order from base earth station into power control step; b) measuring channel change rate from power of pilot channel; c) making tab coefficient using said channel change rate; d) compensating channel change due to loop delay using power control step; and e) renovating received signal power using said power control step.

公开(公告)号：EP1436918A4

公开(公告)日：2006-09-20

申请号：EP02788887

申请日：2002-10-21

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： CHOI KWON-HUE ,  LIM KWANG-JAE ,  KIM SOO-YOUNG

IPC: H04B7/26 ,  H04B7/185

CPC classification number: H04B7/18543

Abstract: Apparatus and method for closed−loop power control in mobile satellite communication system, which can compensate round trip delay. The apparatus for closed−loop power control includes the means of; a)converting power control order from base earth station into power control step; b)measuring channel change rate from power of pilot channel; c)making tab coefficient using said channel change rate; d) compensating channel change due to loop delay using power control step; and e)renovating received signal power using said power control step.

公开(公告)号：EP1327316A4

公开(公告)日：2010-01-27

申请号：EP01976923

申请日：2001-10-17

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： LIM KWANG-JAE ,  KIM SOO-YOUNG ,  LEE HO-JIN ,  YOU MOON-HEE

IPC: H04B7/26 ,  H04B7/185 ,  H04L12/56 ,  H04W74/08 ,  H04W84/06

CPC classification number: H04W74/006 ,  H04B7/18558 ,  H04W74/0833 ,  H04W84/06

公开(公告)号：EP1436914A4

公开(公告)日：2009-08-19

申请号：EP02788886

申请日：2002-10-21

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： LIM KWANG-JAE ,  KIM SOO-YOUNG

IPC: H04B7/19 ,  H04B7/185 ,  H04B7/216

CPC classification number: H04B7/18539 ,  H04B7/216

Abstract: Provided is a method and apparatus for common packet channel access to transmit data packet from a mobile terminal to a satellite access network in a mobile satellite communication system. The method and apparatus of this invention reduces transmission delay time, enhances the probability of successful access, and controls the currently used common packet channel by using a common control channel broadcast by the satellite access network. The method includes the steps of: receiving an access preamble including an access signature code and a collision-detection preamble including a collision-detection signature code, which are transmitted together from a plurality of mobile terminals, and transmitting an acknowledgement to the access preamble and collision-detection preamble to mobile terminals through a preamble acknowledgement channel.