公开(公告)号：US20230137974A1

公开(公告)日：2023-05-04

申请号：US17978579

申请日：2022-11-01

Applicant: Electronics and Telecommunications Research Institute

Inventor： Dong Hyun JUNG ,  Gyeong Rae IM ,  Joon Gyu RYU

IPC: H04B7/185

Abstract: A satellite cluster system may comprise: at least one slave satellite; a master satellite sharing a control signal and an information signal with the at least one slave satellite through an inter-satellite link; and a terrestrial control system for adjusting positions of the master satellite and the at least one slave satellite and transmitting the control signal and the information signal to the master satellite.

公开(公告)号：US20250023682A1

公开(公告)日：2025-01-16

申请号：US18712693

申请日：2022-11-23

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Gyeong Rae IM ,  Jung Bin KIM ,  Pan Soo KIM ,  Min Su SHIN ,  In Ki LEE ,  Dong Hyun JUNG ,  Soo Yeob JUNG ,  Seung Keun PARK ,  Joon Gyu RYU

IPC: H04L5/00 ,  H04B7/06 ,  H04W24/10

Abstract: The present invention relates to a method for transmitting a synchronization signal block (SSB) through a plurality of satellites from a base station that can connect to a plurality of gateways, wherein the method may comprise the steps of: controlling transmission of first SSBs corresponding to the number of beams of each satellite through respective transmission beams in a first SSB cycle; determining a transmission beam of each of the satellites on the basis of a first measurement report for the respective beams received from a terminal; and controlling transmission of second SSBs for determining one combination including two or more gateways among the plurality of gateways in a second SSB cycle.

公开(公告)号：US20220321250A1

公开(公告)日：2022-10-06

申请号：US17409088

申请日：2021-08-23

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jung Bin KIM ,  Dong Hyun JUNG

IPC: H04L1/00 ,  H04B7/06

Abstract: An operation method of a base station in a communication system may comprise: transmitting first indication information to a terminal, the first indication information indicating use of a first CQI table among CQI tables; transmitting a first reference signal to the terminal; and receiving first CSI from the terminal, the first CSI including a first CQI index selected within the first CQI table based on the first reference signal, wherein the CQI tables include the first CQI table and a second CQI table, and a spectral efficiency indicated by at least one CQI index within the first CQI table is identical to a spectral efficiency indicated by at least one CQI index within the second CQI table.

公开(公告)号：US20250031162A1

公开(公告)日：2025-01-23

申请号：US18712650

申请日：2022-11-23

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Gyeong Rae IM ,  Jung Bin KIM ,  Pan Soo KIM ,  Min Su SHIN ,  In Ki LEE ,  Dong Hyun JUNG ,  Soo Yeob JUNG ,  Seung Keun PARK ,  Joon Gyu RYU

IPC: H04W56/00 ,  H04W16/28 ,  H04W72/0457 ,  H04W84/06

Abstract: A method according to an embodiment of the present invention corresponds to a method for transmitting, by a gateway, a synchronization signal block (SSB) through a plurality of satellites, and may comprise the steps of: determining satellite identification SSBs for identifying a plurality of satellites, respectively; determining beam identification SSBs for identifying beams usable for the plurality of satellites, respectively; and controlling the satellite identification SSBs and the beam identification SSBs to be transmitted to the plurality of satellites, respectively, through a predetermined resource, wherein the satellite identification SSBs and each of the beam identification SSBs have different SSB indices from each other.

公开(公告)号：US20220182193A1

公开(公告)日：2022-06-09

申请号：US17540792

申请日：2021-12-02

Applicant: Electronics and Telecommunications Research Institute

Inventor： Gyeong Rae IM ,  Pan Soo KIM ,  Joon Gyu RYU ,  Dong Hyun JUNG ,  Soo Yeob JUNG

IPC: H04L5/00 ,  H04B7/195

Abstract: An operation method of an IoT terminal performing communications with a satellite may comprise: receiving a first signal from the satellite; determining a number of symbols constituting a preamble based on the first signal; generating a first frame including a preamble generated according to the determined number of symbols, and transmitting the generated first frame to the satellite; and generating a second frame including a preamble generated according to the determined number of symbols when a response signal to the first frame is received from the satellite, and transmitting the generated second frame to the satellite.

公开(公告)号：US20220061009A1

公开(公告)日：2022-02-24

申请号：US17408830

申请日：2021-08-23

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jung Bin KIM ,  Pan Soo KIM ,  Dong Hyun JUNG

IPC: H04W56/00 ,  H04W74/08

Abstract: A timing control method performed by a terminal included in a communication network may include: configuring an initial timing reference based on time information obtained from the communication network; receiving a first downlink (DL) signal from a base station; based on the initial timing reference and the first DL signal, obtaining first transmission time information that is information on a timing when the first DL signal is transmitted by the base station and first reception time information that is information on a timing when the first DL signal is received by the terminal; determining a first timing advance (TA) value based on comparison between the first reception time information and the first transmission time information; and adjusting an uplink (UL) transmission timing for the base station based on the first TA value.