Electronics and Telecommunications Research Institute

Other

Korea Research Institute of Standards and Science

Kyoung Seok Lee

Jae Heung Kim

Tae Gyun Noh

Jae Young Ahn

Young Jo Ko

Heesoo Lee

Soo Jung Jung

Seung Chan Bang

Byung Jang Jeong

Bang Won Seo

Kook Jin Lee

Hee Soo Lee

Byung Han Ryu

Jung Im Kim

Jung Hoon Lee

Sung Hyun Moon

Jung-Im Kim

Yeong Jin Kim

Taegyun Noh

Cheul Soon Kim

Byung-Han Ryu

Ji Hyung Kim

Mi Young Yun

Min Hyun Kim

Eun Ah Kim

Young-Jo Ko

Jae-Heung Kim

Il-Soon Jang

Yun-Hee Lee

Choong Il Yeh

Kwang Soon Kim

Soo-Jung Jung

Choongil Yeh

Ae Soon Park

Seung Kwon Cho

Seung Hoon Nahm

Deuk Su Lyu

In Jung Kim

Hyun Yong Hwang

Sun Sim Chun

Yong Il Kim

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.

Carrier aggregation in wireless communication systems

A method for reducing power consumption of a terminal that communicates with a base station in a mobile communication system using a multi-carrier structure composed of a primary component carrier and at least one secondary component carrier comprises: receiving a discontinuous reception (DRX) parameter group for multi carriers from the base station; and setting the multi carriers to the same parameter value, by using the received parameter group. The method for reducing power consumption of the terminal further comprises: performing a downlink control channel receive operation on each carrier according to a DRX cycle. As the base station in the mobile communication system using the multi-carrier structure simplifies the DRX process for reducing power consumption of a terminal by reducing signaling load for the multi-carrier control of the terminal, it becomes possible to reduce power consumption of the terminal.

Method for reducing power consumption of terminal in mobile communication system using multi-carrier structure

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

Disclosed are a method and an apparatus for beam failure recovery in a communication system. The method for beam failure recovery includes the steps of: searching for a plurality of candidate beams when a beam failure is detected; transmitting a beam failure recovery request signal to a base station by using beam #1 of the plurality of candidate beams; receiving a beam failure recovery response signal in response to the beam failure recovery request signal via beam #1 from the base station; and transmitting an SR requesting a resource for transmission of multi-beam setting information to the base station, wherein the multi-beam setting information includes indexes of one or more beams excluding beam #1 of the plurality of candidate beams. Therefore, performance of the communication system can be improved.

Method and apparatus for beam failure recovery in communication system

Method and apparatus for transmitting scrambled data by user equipment

Provided is a method for transmitting paging information in a cellular system. An object of the method is transmitting paging information which can improve applicability of a limited radio resource by variably and flexibly setting up and mapping a transport channel and a physical channel in order to transmit information notifying start of downlink information from a base station to a terminal in a cellular system for packet transmission. The method includes the steps of: forming a paging channel (PCH) in a transport channel corresponding to generation of paging information; setting a paging indication channel (PICH) based on the paging information and forming the paging indication channel in a radio resource of a physical layer; and allocating the paging channel to the radio resource of the physical layer.

Method for paging information in cellular system

A method and an apparatus for beam failure recovery in a communication system. The method for beam failure recovery includes the steps of: searching for a plurality of candidate beams when a beam failure is detected; transmitting a beam failure recovery request signal to a base station by using beam #1 of the plurality of candidate beams; receiving a beam failure recovery response signal in response to the beam failure recovery request signal via beam #1 from the base station; and transmitting an SR requesting a resource for transmission of multi-beam setting information to the base station, where the multi-beam setting information includes indexes of one or more beams excluding beam #1 of the plurality of candidate beams.

A resource management method performed by a CP in C-RAN system includes configuring M user-centric cells for M terminals with a plurality of ANs, and determining a number K of orthogonal resource sharing groups sharing a same orthogonal resource; selecting K user-centric cells as group headers for the K orthogonal resource sharing groups, and adding the selected K user-centric cells as group headers to the K orthogonal resource sharing groups; configuring the K orthogonal resource sharing groups by sequentially adding ungrouped user-centric cells to the K orthogonal resource sharing groups; and dividing total system resources into K orthogonal resources, and mapping the divided K orthogonal resources to the K orthogonal resource sharing groups, respectively.

Resource management method and apparatus in user-centric wireless network

Provided is a method and apparatus that may control a configuration and operation of a network including a base station to support a multicast and broadcast multimedia service in a cellular system and may control an operation of a terminal and the like, and thus, may effectively provide a multimedia service in the cellular system.

Apparatus supporting an MBMS service

Disclosed is a method and apparatus for RA in a cellular system. The RA in the cellular system includes receiving an RA preamble from a terminal for RA, transmitting, to the terminal, an RA response message including a sequence of the received RA preamble and uplink resource information of the terminal and overload state information with respect to the RA, receiving control information generated based on the RA response message from the terminal through the uplink resource information, and transmitting control response information with respect to the received control information.

Apparatus and method for random access in cellular system

Provided are an uplink transmission method and downlink transmission method in a mobile communication network including a relay. In the uplink and downlink transmission methods, frame structures and transmission timings of a backhaul downlink and a backhaul uplink are determined in consideration of at least one of a time for the relay to switch between transmission and reception and a signal transmission time. Accordingly, in a wireless communication system including a relay, it is possible to effectively perform data transmission and reception between the relay and a base station.

Data transmission method for wireless communication system involving relay

Growing community of inventors

Daejeon, South Korea

Kyoung Seok Lee