公开(公告)号：KR100948692B1

公开(公告)日：2010-03-18

申请号：KR20080093358

申请日：2008-09-23

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： LEE NAM KYUNG ,  HAN KI SEOP ,  CHANG DAE IG ,  LEE HO JIN

IPC: H04L29/02 ,  H04L27/02

CPC classification number: H04N21/4305

Abstract: PURPOSE: A reference time information restoring method and a device and a data reception device thereof are provided to maintain stable network synchronization by restoring an exact value by preventing inconsistencies between a transmission time and reception time. CONSTITUTION: A communications unit(100) receives the transmission stream of an external data transmission device. A reception time record unit(110) records the reception time of an initial frame of a plurality of physical layer frames included in the transmission frame. A reception time recognition unit(120) recognizes the reception time of an initial frame corresponding to a physical layer frame including the reference time information of the transmission frame. A restoring unit(130) restores reference time information according to the reception time information of an initial frame of the physical layer frame. A synchronization unit(140) synchronizes with a data transmission device which transmits a transmission frame through the communications unit based on the reference time information. An error correction unit(150) corrects errors in a data transmission process.

Abstract translation: 目的：提供参考时间信息恢复方法及其装置和数据接收装置，以通过防止传输时间与接收时间之间的不一致来恢复精确值来维持稳定的网络同步。 构成：通信单元（100）接收外部数据传输设备的传输流。 接收时间记录单元（110）记录包含在传输帧中的多个物理层帧的初始帧的接收时间。 接收时间识别单元（120）识别与包括传输帧的参考时间信息的物理层帧相对应的初始帧的接收时间。 恢复单元（130）根据物理层帧的初始帧的接收时间信息恢复基准时间信息。 同步单元（140）与基于参考时间信息通过通信单元发送传输帧的数据传输设备同步。 纠错单元（150）纠正数据传输过程中的错误。

公开(公告)号：KR100902335B1

公开(公告)日：2009-06-12

申请号：KR20070132496

申请日：2007-12-17

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： HAN KI SEOP ,  CHANG DAE IG ,  LEE HO JIN

IPC: H04L7/00 ,  H04B7/26 ,  H04J3/00

CPC classification number: H04B7/2125 ,  H04B7/18589 ,  H04W56/0075 ,  H04L27/3405

Abstract: An NCR packet insertion in satellite communication systems is provided to transmit steadily the NCR(net clock reference) value. The MODCOD having the lowest error rate is selected(102). The NCR value is inserted into the selected MODCOD frame. The MODCOD frame is transmitted to the reception terminal(103). The timer is the reset(104). The time value is increased. The arrival time value of packet is compared with the time value(106). If the time value is smaller than a threshold value(107), the time value is continually increased. If not so, the presence of selected MODCOD is confirmed(110). If there is no the selected MODCOD, the time value is increased.

Abstract translation: 提供在卫星通信系统中的NCR分组插入以稳定地传送NCR（净时钟参考）值。 选择具有最低错误率的MODCOD（102）。 将NCR值插入到所选的MODCOD帧中。 MODCOD帧被发送到接收终端（103）。 定时器是复位（104）。 时间值增加。 将分组的到达时间值与时间值（106）进行比较。 如果时间值小于阈值（107），则时间值不断增加。 如果不是这样，确认所选MODCOD的存在（110）。 如果没有选择的MODCOD，则时间值增加。