Electronics and Telecommunications Research Institute

Joonwoo Shin

Young Jo Ko

Cheulsoon Kim

Sung-Hyun Moon

Jun Hwan Lee

Eun-Young Choi

Young Seog Song

Juho Park

A method in which a base station transmits pilot signals in a multiple-antenna communication system is provided. The base station includes some of the plurality of pilot signals distinguished by at least one of time domain symbols, subcarriers, and orthogonal codes in a first set to which a first random number is applied. The base station includes the remaining pilot signals, excluding the pilot signals that are included in the first set, in a second set that uses the same resources as used by the first set and to which a second random number different from the first random number is applied. The base station transmits at least one of the pilot signals that belong to the first set and the second set.

Method and apparatus for transmitting pilot in multi-antenna communication system, and method and apparatus for allocating pilot in multi-antenna communication system

In an environment in which a macrocell and a plurality of small cells exist, a terminal receives a discovery signal from a first small cell adjacent to the terminal among the plurality of small cells. When the first small cell is in a predetermined state, the terminal measures RRM of the first small cell based on the discovery signal.

Method and apparatus for measuring radio resource management, and method and apparatus for signalling signal to measure radio resource management

A method for transmitting a sounding reference signal (SRS) by a terminal in an environment in which a first carrier corresponding to a first serving cell and a second carrier corresponding to a second serving cell are aggregated is provided. The terminal receives first downlink control information (DCI) which is used for downlink scheduling and includes a first transmit power control (TPC) command through the first serving cell. The terminal controls transmit power of the SRS based on the first TPC command for transmit power control of the SRS. Next, the terminal transmits the SRS through the second serving cell using the controlled transmit power.

Method and apparatus for transmitting uplink signal or uplink channel

Growing community of inventors

Daejeon, South Korea

Joonwoo Shin