公开(公告)号：US20190207738A1

公开(公告)日：2019-07-04

申请号：US16134632

申请日：2018-09-18

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jung Bo SON ,  Dong Hyuk GWAK ,  Seon Ae KIM ,  Yu Ro LEE ,  Hyun LEE ,  Hyung Sik JU

IPC: H04L5/14 ,  H04W52/52 ,  H04B15/00

CPC classification number: H04L5/14 ,  H04B15/00 ,  H04W52/52

Abstract: An operating method of a slave node that communicates with a master node in an in-band full duplex (IFD) system may comprise receiving a beacon signal from the master node during a training sequence period; transmitting a first self-interference (SI) training sequence including a first radio frequency (RF)/analog SI training sequence, a first automatic gain control (AGC) sequence, and a first digital SI training sequence to the master node during the training sequence period after the beacon signal is received; calculating a filter factor for canceling an analog SI signal input to the slave node on the basis of the first RF/analog SI training sequence; and canceling the analog SI signal from the first AGC sequence on the basis of the filter factor.

公开(公告)号：US20200351255A1

公开(公告)日：2020-11-05

申请号：US16860796

申请日：2020-04-28

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Dong Hyuk GWAK ,  Hyung Sik JU

IPC: H04L29/06 ,  H04L12/823 ,  H04L5/00

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：US20180213547A1

公开(公告)日：2018-07-26

申请号：US15870833

申请日：2018-01-12

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Hyung Sik JU ,  Dong Hyuk GWAK ,  Seon Ae KIM ,  Yu Ro LEE

IPC: H04W72/12 ,  H04L5/14 ,  H04L5/00 ,  H04W72/04

CPC classification number: H04W72/1242 ,  H04L5/0037 ,  H04L5/0044 ,  H04L5/0069 ,  H04L5/14 ,  H04W72/042 ,  H04W72/044 ,  H04W72/048 ,  H04W72/121 ,  H04W72/1226

Abstract: An operation method of a base station in an IFD scheme may comprise receiving position information of each of a plurality of downlink (DL) terminals and a plurality of uplink (UL) terminals; determining a guard zone corresponding to each of the plurality of DL terminals based on the position information of each of the plurality of DL terminals; determining whether at least one UL terminal is located in the guard zone based on the position information of each of the plurality of UL terminals; determining a scheduling priority of each of the plurality of DL terminals according to whether at least one UL terminal is located in the guard zone; generating DL control information including frequency-time resource allocation information and interference control information based on the determined scheduling priority; and transmitting data signals and the DL control information to the plurality of DL terminals.

公开(公告)号：US20190199392A1

公开(公告)日：2019-06-27

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 ,  H04L5/14 ,  H04L25/02

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：US20190181974A1

公开(公告)日：2019-06-13

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 ,  H04W12/12 ,  H04W72/04

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.

公开(公告)号：US20180076847A1

公开(公告)日：2018-03-15

申请号：US15697592

申请日：2017-09-07

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hyung Sik JU ,  Dong Hyuk GWAK ,  Seon Ae KIM ,  Yu Ro LEE ,  Hyun LEE

IPC: H04B1/525 ,  H04B7/0413

CPC classification number: H04B1/525 ,  H04B7/0413 ,  H04L5/0023 ,  H04L5/14 ,  H04L5/16 ,  H04L25/022 ,  H04L25/0224 ,  H04L25/0328

Abstract: An operation method of an in-band full duplex (IFD) multiple-input multiple-output (MIMO) transceiver, including a reception part, a transmission part, an analog self-interference (SI) generator, and a self-interference cancellation (SIC) controller, may comprise generating, at the SIC controller, a control signal for analog SIC and digital SIC and outputting the control signal to the reception part and the analog SI generator; cancelling, at the SIC controller, SI of a transmission signal of the transmission part based on the control signal; and cancelling, at the reception part, SI of a signal of the reception part based on the control signal.