公开(公告)号：US10090905B2

公开(公告)日：2018-10-02

申请号：US14982618

申请日：2015-12-29

Applicant: Electronics and Telecommunications Research Institute

Inventor： Young Seog Song ,  Jun Hwan Lee ,  Juho Park ,  Joonwoo Shin ,  Eun-Young Choi

IPC: H04W4/00 ,  H04B7/06 ,  H04L5/00 ,  H04L27/26

Abstract: 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.

公开(公告)号：US09603084B2

公开(公告)日：2017-03-21

申请号：US14603968

申请日：2015-01-23

Applicant: Electronics and Telecommunications Research Institute

Inventor： Cheulsoon Kim ,  Young Jo Ko ,  Joonwoo Shin ,  Sung-Hyun Moon

IPC: H04W80/04 ,  H04W48/16 ,  H04W24/08 ,  H04W84/04

CPC classification number: H04W48/16 ,  H04W24/08 ,  H04W84/045

Abstract: 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.

公开(公告)号：US09414335B2

公开(公告)日：2016-08-09

申请号：US14615970

申请日：2015-02-06

Applicant: Electronics and Telecommunications Research Institute

Inventor： Sung-Hyun Moon ,  Young Jo Ko ,  Cheulsoon Kim ,  Joonwoo Shin

IPC: H04W52/54 ,  H04L5/00 ,  H04W52/32 ,  H04W52/34 ,  H04W52/40 ,  H04W72/12

CPC classification number: H04W52/54 ,  H04L5/001 ,  H04L5/0048 ,  H04L5/0051 ,  H04W52/325 ,  H04W52/34 ,  H04W52/40 ,  H04W72/1289

Abstract: 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.

Abstract translation: 提供了一种在与第一服务小区对应的第一服务小区和与第二服务小区对应的第二载体对应的第一载波聚合的环境中由终端发送探测参考信号（SRS）的方法。 终端接收用于下行链路调度的第一下行链路控制信息（DCI），并且包括通过第一服务小区的第一发射功率控制（TPC）命令。 终端基于用于SRS的发射功率控制的第一TPC命令来控制SRS的发射功率。 接下来，终端通过受控发送功率通过第二服务小区发送SRS。