公开(公告)号：US11757855B2

公开(公告)日：2023-09-12

申请号：US16860796

申请日：2020-04-28

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Dong Hyuk Gwak ,  Hyung Sik Ju

IPC: H04L9/40 ,  H04L5/00 ,  H04L47/32

CPC classification number: H04L63/061 ,  H04L5/0048 ,  H04L47/323 ,  H04L63/0442

Abstract: An operation method of a first communication node in a communication system may comprise estimating a channel state between the first communication node and a second communication node based on a pilot signal received from the second communication node; generating a first channel codebook based on the estimated channel state; transmitting information of the first channel codebook to the second communication node; receiving a response indicating whether the first channel codebook is to be used from the second communication node; when the response is an ACK indicating that the first channel codebook is to be used, generating a first secret key by using the first channel codebook; and transmitting data encrypted using the first secret key to the second communication node.

公开(公告)号：US10797745B2

公开(公告)日：2020-10-06

申请号：US16221970

申请日：2018-12-17

Applicant: Electronics and Telecommunications Research Institute

Inventor： Seon Ae Kim ,  Dong Hyuk Gwak ,  Tae Joong Kim ,  Jung Bo Son ,  Yu Ro Lee ,  Hyun Lee ,  Hyung Sik Ju

IPC: H04B1/525 ,  H04B1/00 ,  H04L25/02 ,  H04L5/14 ,  H04B1/48

Abstract: An operation method of an in-band full duplex (IFD) transceiving apparatus including a receiving end, a transmitting end, a digital self-interference cancellation (DSIC) processing unit, and a digital SI cancellation unit may comprise generating, by the DSIC processing unit, signal shaping coefficients for wave shaping of a signal of the transmitting end; generating, by the DSIC processing unit, channel estimation coefficients for cancellation of a self-interference signal in a reception signal of the receiving end; forming, by the DSIC processing unit, a transmission signal based on the signal shaping coefficients; and generating, by the DSIC processing unit, a control signal for cancellation of the self-interference signal in the reception signal based on the channel estimation coefficients.

公开(公告)号：US10608777B2

公开(公告)日：2020-03-31

申请号：US16207585

申请日：2018-12-03

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Hyung Sik Ju ,  Dong Hyuk Gwak ,  Seon Ae Kim ,  Jung Bo Son ,  Yu Ro Lee ,  Hyun Lee

IPC: H04K3/00 ,  H04W72/04 ,  H04W12/12 ,  H04J11/00 ,  H04L27/26 ,  H04L27/34

Abstract: An operation method of a terminal in a wireless communication system includes: transmitting uplink (UL) traffic information indicating a size of a UL data signal to a base station; receiving a jamming message generated based on the UL traffic information from the base station; generating an uplink (UL) transmission signal including the UL data signal and a UL jamming signal based on the jamming message; and transmitting the UL transmission signal to the base station. Also, the jamming message indicates a pattern of the UL jamming signal, the UL transmission signal is transmitted in a same frequency band as a frequency band in which a downlink (DL) transmission signal of the base station is received, and the UL jamming signal is transmitted in remaining resources excluding resources occupied by the UL data signal in the frequency band.