Electronics and Telecommunications Research Institute

Samsung Electronics Co., Ltd.

Young Jo Ko

Jae Young Ahn

Il Gyu Kim

Seung Chan Bang

Kap Seok Chang

Hyeong Geun Park

Hyo Seok Yi

Bang Won Seo

Young Hoon Kim

Tae Gyun Noh

Byung Jang Jeong

Kyoung Seok Lee

Eunkyung Kim

Gi Yoon Park

Bangwon Seo

Wooram Shin

Seung-Kwon Baek

Heesoo Lee

Chanho Yoon

Sung-Hyun Moon

Chan Bok Jeong

Seung Kwon Baek

Cheulsoon Kim

Chan Ho Yoon

Moon Sik Lee

Woo Ram Shin

Cheul Soon Kim

Kapseok Chang

Jae Heung Kim

Junyoung Nam

Yong Sun Kim

Seok Ki Kim

Hee Soo Lee

Young-Hoon Kim

Sung Cheol Chang

Kwang Jae Lim

Sung Hyun Moon

Jun Hwan Lee

Jae Sun Cha

Eun-Young Choi

Young Seog Song

Ok Sun Park

Juho Park

Kyoung Joon Lee

Joonwoo Shin

Eun Kyung Kim

Seung-Chan Bang

Jung Hoon Kim

Sang Ho Lee

Changhee Lee

Jun Sik Kim

Seok Bong Hyun

Daeho Kim

Taegyun Noh

Bang-Won Seo

Soon Gi Park

Choongil Yeh

Jung Im Kim

Ok-Sun Park

Jun Young Nam

Won Ik Kim

Kyeong Pyo Kim

Joon Woo Shin

An operation method of a terminal in a communication system may comprise: receiving, from a first base station, information on preambles for random access; transmitting, to the first base station, a first message including a preamble selected based on the information on the preambles; receiving, from the first base station, a second message that is a response signal for the first message; transmitting, to the first base station, a third message requesting a preemptive use of the selected preamble during a first preemptive use period; and receiving, from the first base station, a fourth message allowing the preemptive use of the selected preamble during the first preemptive use period, and performing a random access procedure by using the selected preamble during the first preemptive use period.

Method and apparatus for acquiring and maintaining synchronization in communication systems

A method of a central unit (CU) may comprise: receiving, from a terminal, measurement information for radio access points; configuring a cluster using two or more radio access points among the radio access points based on the measurement information; and generating first data to which a cluster header including a cluster identifier of the cluster is attached; and transmitting the first data to the two or more radio access points, wherein second data generated in the two or more radio access points includes the first data and a packet data convergence protocol (PDCP) header, the CU performs a first partial PDCP function, and the two or more radio access points perform a second partial PDCP function.

Method and apparatus of data transmission for high capacity network

An operation method of a terminal in a communication system may comprise: receiving, from a base station, information on a command period of a sub-frame, information on an action period of the sub-frame, and information on a report period of the sub-frame; receiving, from the base station, a command in the command period; performing an action according to the received command in the action period; and reporting, to the base station, a result according to the action in the report period.

Method and apparatus for operating frame in factory automation system

The present application relates to a method of generating a downlink frame. The method of generating the downlink frame includes: generating a first short sequence and a second short sequence indicating cell group information; generating a first scrambling sequence and a second scrambling sequence determined by the primary synchronization signal; generating a third scrambling sequence determined by the first short sequence and a fourth scrambling sequence determined by the second short sequence; scrambling the short sequences with the respective scrambling sequences; and mapping the secondary synchronization signal that includes the first short sequence scrambled with the first scrambling sequence, the second short sequence scrambled with the second scrambling sequence and the third scrambling sequence, the second short sequence scrambled with the first scrambling sequence and the first short sequence scrambled by the second scrambling sequence and the fourth scrambling sequence to a frequency domain.

Generating downlink frame and searching for cell

A method of searching a cell in a mobile station of a communication system in which a plurality of cells are grouped into a plurality of cell groups, each cell group including at least two cells, includes: detecting a primary synchronization signal and a secondary synchronization signal from a received signal; and identifying a cell based on a combination of the primary synchronization signal and the secondary synchronization signal. The secondary synchronization signal is related to the cell group to which the mobile station belongs and the primary synchronization signal is related to the cell to which the mobile station belongs within the cell group.

Cell search method, forward link frame transmission method, apparatus using the same and forward link frame structure

Disclosed are a method and an apparatus for uplink transmission in a communication system. An operation method of a terminal includes: receiving, from a base station, first SFI information indicating n flexible symbol(s); receiving, from the base station, second SFI information re-indicating m symbol(s) of the n flexible symbol(s) as uplink (UL) symbol(s); and transmitting an SRS to the base station through the m symbol(s) re-indicated as a UL symbol among the n flexible symbol(s) indicated as a flexible symbol. Therefore, performance of the communication system can be improved.

Method and apparatus for uplink transmission in communication system

A beam fingerprint-based positioning method, performed by a communication node located in a target space, may include: performing measurements on positioning signals transmitted from at least one reference node through a plurality of directional beams in a beam sweeping scheme; transmitting a result of the measurements to a central node; and receiving information on a position of the communication node from the central node.

Method and apparatus of positioning for accommodating wireless-environment change

Disclosed is a method for generating and transmitting a reference signal in a clustered DFT-spread OFDM transmission scheme. A method for generating and transmitting a DM-RS in a clustered DFT-spread-OFDM scheme comprises: a step of generating DM-RS sequences corresponding to the number of clusters allocated for an uplink transmission; and a step of mapping the generated DM-RS sequences to the relevant DM-RS symbol positions for each cluster. Accordingly, the method for generating and transmitting a reference signal according to the present invention, in which DM-RS sequences are allocated and transmitted on a cluster basis, uses a complete DM-RS sequence for each cluster, and therefore inter-cell interference can be weakened, and problems which might occur when applied to a multi-user MIMO (MU-MIMO) scheme can be solved.

Method for generating and transmitting a reference signal for uplink demodulation in a clustered DFT-spread OFDM transmission scheme

An operation method of a terminal may comprise receiving, from a base station, information of target transmission points targeted for a report of first channel state information (CSI) among the plurality of transmission points; receiving a first CSI-reference signal (CSI-RS) from the target transmission points; transmitting the first CSI determined based on the first CSI-RS to the base station; receiving, from the base station, information on a first transmission point determined based on the first CSI; receiving, from the first transmission point indicated by the information on the first transmission point, a second CSI-RS; receiving, from the base station, information on a requirement; and transmitting, to the base station, a second CSI including a transmission parameter for achieving the requirement.

Method and apparatus for ultra reliable and low latency communication

A reference signal (RS) transmission system to transmit a channel state information (CSI) RS for extraction of CSI to a relay and a macro terminal is disclosed. The base station transmits information on a sub frame containing the CSI RS to the relay or the macro terminal. The macro terminal and the relay receive the CSI RS using the information on the sub frame. The macro terminal and the relay extract the CSI using the CSI RS and transmit the extracted CSI to the base station.

System for transmitting reference signal with information on state of channel

An operation method of a transmitter in a communication system may comprise: configuring a first reference signal region for transmission of a first reference signal in the delay-Doppler domain; arranging the first reference signal having a sequence form in a specific region within the first reference signal region; transforming a delay-Doppler domain signal including the first reference signal into a time domain signal; and transmitting the time domain signal to a receiver.

Method and apparatus for channel estimation in communication system

Provided is a data transmission system using a carrier aggregation. The data transmission system may assign a radio resource based on a correspondence relationship between a downlink and an uplink, and may transmit data using the assigned radio resource.

Method and apparatus for transmitting scrambled data by user equipment

The present invention relates to a method for generating a downlink frame including generating a first short sequence and a second short sequence indicating cell group information, generating a first scrambling sequence determined by the first synchronization signal, generating a second scrambling sequence determined by the first short sequence, scrambling the first short sequence with the first scrambling sequence, scrambling the second short sequence with at least the second scrambling sequence, and mapping a second synchronization signal including the scrambled first short sequence and the scrambled second short sequence in the frequency domain.

Data transmission and reception is provided by configuring control channels in a wireless communication system using a plurality of carriers. User equipment (UE) may monitor physical downlink control channel (PDCCH) candidates within common search spaces (CSSs) and User Equipment-specific search spaces (USSs). If the UE is configured with cross-carrier scheduling, when two PDCCH candidates originating from a CSS and a USS, respectively, have cyclic redundancy check (CRC) scrambled by the same Radio Network Temporary Identifier (RNTI) and have a common payload size and the same first control channel element (CCE) index, the UE may interpret that only the PDCCH originating from the CSS is transmitted, thereby solving ambiguity of downlink control information (DCI) detection.

Method and apparatus for transmission and reception in multi-carrier wireless communication systems

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Daejeon, South Korea

Young Jo Ko