Electronics and Telecommunications Research Institute

Samsung Electronics Co., Ltd.

Industry-academic Cooperation Foundation, Chosun University

Sung Cheol Chang

Chul Sik Yoon

Hyun Jun Lee

Sung Kyung Kim

Eunkyung Kim

Won-Ik Kim

Kwang Jae Lim

Soojung Jung

Jae Sun Cha

Seokki Kim

Seungkwon Cho

Mi Young Yun

Jee Hwan Ahn

Hyung Jin Kim

Sung-Geun Jin

Chanho Yoon

Hyun-jae Kim

Yu Ro Lee

Seung-Kwon Baek

Anseok Lee

Taegyun Noh

Jae Heung Kim

Jung Hoon Lee

DongSeung Kwon

Jae Joon Park

Sung Hyun Moon

Cheul Soon Kim

Jihoon Choi

Young Jo Ko

Tae Joong Kim

Jun Sik Kim

Hyun Seo Park

Juhee Kim

Yong Seouk Choi

Yun Joo Kim

Pyeong Jung Song

An Seok Lee

Soon Gi Park

Mi-Young Yun

Sun Mi Jun

Seokjoo Shin

Il Gyu Kim

Seung Chan Bang

Young-Jo Ko

Young-Ho Jung

Jin Kyeong Kim

Hyun-Jae Kim

Seok Ki Kim

Kwang-Jae Lim

Kwang Soon Kim

Sung Geun Jin

Hyunsu Kim

Hyukjun Oh

Byung Jae Kwak

Young Jin Sang

Namgi Kim

Seok Heon Cho

Jimin Bae

Duk Kyung Kim

Gwang Hae Kim

An operation method of a first cell in a communication system may include: receiving, from a first communication node that is an upper node of the first cell, a first signal including second cell configuration information of a second cell connected with the first communication node and a second communication node that is a lower node of the first cell; identifying, based on the first signal, that the first cell and the second cell are jointly operated by the first communication node as coordinative PCells; transmitting, to the second communication node, a second signal including information on joint operations of the coordinative PCells by the first communication node; and performing communication with the first communication node and the second communication node based on the joint operations of the coordinative PCells.

Method and apparatus for cell operation in communication system

An operation method of a terminal in a communication system may comprise: obtaining a plurality of serving beam measurement values by performing measurement on a plurality of serving beams; identifying a minimum measurement value among the plurality of serving beam measurement values; obtaining a plurality of beam measurement values by performing measurement on a plurality of beams received from a plurality of base stations included in the communication system; determining whether a first condition is satisfied, the first condition being defined based on a result of comparison between the plurality of beam measurement values and a sum of the minimum measurement value and a first offset; and in response to determining that the first condition satisfied, performing communication with at least part of the plurality of serving base stations and a first base station forming a first beam satisfying the first condition.

Method and apparatus for beam-based communication in communication system

Provided is a method for transmitting, by a transmitter, a first data having periodicity through a channel of an unlicensed band: The transmitter adjusts at least one of transmission timing of the first data and clear channel assessment (CCA) timing for the channel to occupy the channel. The transmitter determines whether the channel may be occupied by performing a CCA on the channel at the CCA timing. The transmitter transmits the first data through the channel at the transmission timing of the first data, when it is determined that the channel may be occupied.

Method and apparatus for managing allocation and usage of radio resource, method and apparatus for transmitting data through unlicensed band channel, and method and apparatus for managing access of radio resource

A method for operating a transmission node performing link adaptation in a mobile communication network may include the steps of: receiving, from a resource allocation node, resource allocation information for a resource for transmission of data; determining link adaptation information and transmitting the determined link adaptation information to a reception node; and on the basis of the determined link adaptation information, transmitting the data to the reception node. Therefore, link adaptation accurately reflecting a radio channel state between a base station and terminals can be performed, thereby enabling efficient use of a radio resource.

Link adaptation method in mobile communication system and device therefor

An operation method of a base station in a communication system may comprise: generating first RACH configuration information for a normal terminal; generating second RACH configuration information for a RedCap terminal; transmitting a message including the first RACH configuration information and the second RACH configuration information; and performing a random access procedure with a first terminal based on the message, wherein a terminal type of the first terminal is identified based on the first RACH configuration information and the second RACH configuration information, and the terminal type is the normal terminal or the RedCap terminal.

Method and apparatus for coverage enhancement of terminal in communication system

An operation method of a terminal in a communication system may comprise receiving first random access (RA) configuration information and second RA configuration information from a base station; transmitting a Msg1 to the base station based on the second RA configuration information; receiving a Msg2, which is a response to the Msg1, from the base station; and repeatedly transmitting a Msg3 K times to the base station.

Method and apparatus for extending coverage in communication system

An operation method of a relay terminal for relaying radio communication between a base station and a remote terminal may comprise: recognizing a relay request of the remote terminal for system information provided by the base station; acquiring the system information from the base station; and transmitting the system information to the remote terminal.

Method and apparatus for relaying public signals in communication system

A relaying method, performed by a relay terminal using sidelink in a communication system, may comprise: receiving a plurality of data units from a plurality of remote terminals; generating a multiplexed data unit including identification information of the plurality of remote terminals and the plurality of data units; and transmitting the multiplexed data unit to a base station, wherein the identification information includes a terminal identifier used to identify each of the plurality of remote terminals.

Method and apparatus for relay utilizing sidelink in wireless communication system

An operation method of a first terminal, for synchronized operations according to time-sensitive networking, may comprise: receiving information on a reference time from a base station; obtaining an offset of the first terminal with respect to the reference time or information for deriving the offset, and deriving the offset from the information for deriving the offset; determining a timing at which uplink transmission is performed by reflecting the offset to the reference time; and performing the uplink transmission at the determined timing.

Radio communication method for time-sensitive network, and apparatus therefor

Method and apparatus for managing allocation and usage of radio resource, method and apparatus for transmitting data through unlicensed band channel, and method and apparatus for managing access of radio resouce

An operation method of a terminal performing handover in a mobile communication system may comprise transmitting packet data convergence protocol (PDCP) downlink reception status information of the terminal and information on a target base station to a source base station; receiving downlink data from a user plane function (UPF) via the source base station based on a first tunnel configured between the source base station and the UPF; receiving downlink data from the UPF via the target base station based on a second tunnel configured by the UPF between the target base station and the UPF by using the PDCP downlink reception status information and the information on the target base station, which are transferred from the source base station; and discarding duplicated-received protocol data units (PDUs) from the source base station and the target base station, and reordering remaining PDUs.

Method of transmitting low-latency data during handover in communication system, and apparatus therefor

A device-to-device (D2D) communication method, performed by a receiving D2D terminal, may comprise receiving D2D data from a transmitting D2D terminal; generating feedback information for the D2D data; and receiving information on a first resource for transmission of the feedback information from a base station, and transmitting the feedback information to the transmitting D2D terminal through the first resource, wherein the information on the first resource is received without an explicit scheduling request (SR) to the base station.

Method and apparatus for transmitting sidelink feedback information

A method and an apparatus for transmitting the physical uplink control channel including an uplink control channel expressed by product of a uplink control information and a sequence and demodulation reference signal expressed by a sequence having different cyclic shift values through a short resource block are provided.

Method and apparatus for transmitting physical uplink control channel

A terminal of a communication system transmits a first signal through a physical uplink channel that is allocated within a first radio resource based on a first Transmission Time Interval (TTI) having a first time length at a first step for uplink access, performs the remaining steps for the uplink access using a second radio resource based on the second TTI from a base station, when the terminal may operate based on a second TTI having a second time length smaller than the first time length, and transmits uplink data.

Method and apparatus for fast access and method of supporting fast access in communication system

Growing community of inventors

Daejeon, South Korea

Sung Cheol Chang