公开(公告)号：US20180139711A1

公开(公告)日：2018-05-17

申请号：US15815259

申请日：2017-11-16

Applicant: Electronics and Telecommunications Research Institute

Inventor： Joon Gyu RYU ,  Soo Yeob JUNG ,  Deock Gil OH ,  Jonggyu OH

IPC: H04W56/00

CPC classification number: H04W56/004 ,  H04W84/06

Abstract: Disclosed is a network synchronization apparatus and method of a time division multiple access (TDMA)-based mesh network satellite communication system, the network synchronization method of a terminal in a satellite communication system including receiving timing error information from a central station, generating a mesh superframe start time (SST′) by reversing a sign of the timing error information, and receiving traffic information transmitted by a transmission terminal using the mesh SST′.

公开(公告)号：US20200052778A1

公开(公告)日：2020-02-13

申请号：US16181149

申请日：2018-11-05

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jonggyu OH ,  Pansoo KIM ,  Deock Gil OH ,  Joon Gyu RYU ,  Soo Yeob JUNG

IPC: H04B7/185 ,  H04B7/155 ,  H04W72/04

Abstract: Disclosed is a communication method performed between a satellite and a ground station and apparatuses performing the communication method. The communication method includes transmitting a plurality of frames based on a beam allocation time schedule (BATS) between a satellite and a ground station, and synchronizing the BATS based on a reception time and a detection time of one or more frames among the plurality of frames to be received through a beam open window (BOW) allocated to the ground station.