公开(公告)号：US20140003416A1

公开(公告)日：2014-01-02

申请号：US13841232

申请日：2013-03-15

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jun-Woo Kim ,  Hyeong Sook Park ,  Hoon Lee ,  Seungjae Bahng ,  Youn Ok Park

IPC: H04W56/00

CPC classification number: H04W56/001 ,  H04W48/20 ,  H04W56/00 ,  H04W56/005

Abstract: There is provided a method for acquiring and modifying uplink and downlink synchronization, by which, if there is a possibility of ISI occurring due to incorrect downlink synchronization of a terminal with a base station, the terminal receives a ranging response from the base station, modifies incorrect downlink synchronization, and acquires uplink synchronization in accordance with modified downlink synchronization. The method for acquiring and modifying uplink and downlink synchronization efficiently prevents, in a cooperative communication network, discrepancy in signal transmission synchronization between the base stations, excessive attenuation of a transmitted signal, or a delay caused by a difference in reflection paths.

Abstract translation: 提供了一种用于获取和修改上行链路和下行链路同步的方法，通过该方法，如果由于具有基站的终端的下行链路同步不正确而发生ISI的可能性，则终端从基站接收测距响应，修改 不正确的下行链路同步，并根据修改的下行链路同步获取上行链路同步。 用于获取和修改上行链路和下行链路同步的方法在协作通信网络中有效地防止了基站之间的信号传输同步的差异，发射信号的过度衰减或由反射路径的差异引起的延迟。

公开(公告)号：US10039011B2

公开(公告)日：2018-07-31

申请号：US14951649

申请日：2015-11-25

Applicant: Electronics and Telecommunications Research Institute

Inventor： Seungjae Bahng ,  Gosan Noh ,  Youn Ok Park ,  Hoon Lee

IPC: H04M1/00 ,  H04W16/28 ,  H04B7/06 ,  H04B7/10

CPC classification number: H04W16/28 ,  H04B7/0617 ,  H04B7/10

Abstract: The polarization beamforming communication apparatus of a base station estimates an azimuth, elevation, and polarization of each of terminals using a reference signal of a terminal received through a plurality of dual polarization antennas, determines a stream to be transmitted based on the azimuth, elevation, and polarization of the terminal, and sends the stream to be transmitted to the terminal through a polarization-matched beam formed in accordance with each of the plurality of dual polarization antennas using the azimuth, elevation, and polarization of the terminal.

公开(公告)号：US09392617B2

公开(公告)日：2016-07-12

申请号：US13673159

申请日：2012-11-09

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hoon Lee ,  Seungjae Bahng ,  Kyung Yeol Sohn ,  Youn Ok Park

IPC: H04J3/00 ,  H04W74/00 ,  H04W88/08 ,  H04W8/22

CPC classification number: H04W74/00 ,  H04W8/22 ,  H04W88/085

Abstract: A clustering wireless base station includes a group digital processor including a plurality of digital units (DU) and a plurality of remote radio frequency units (RRU) that are connected to the group digital processor through a transport network and that are installed in each service target area. In this case, each DU includes a decoder that decodes upward data that is received from the each DU, and each RRU includes an encoder that encodes downward data from the each DU.

Abstract translation: 集群无线基站包括：组数字处理器，包括多个数字单元（DU）和多个远程射频单元（RRU），其通过传输网络连接到组数字处理器，并且安装在每个服务目标 区。 在这种情况下，每个DU包括对从每个DU接收的向上数据进行解码的解码器，并且每个RRU包括从每个DU编码向下数据的编码器。

公开(公告)号：US08937938B2

公开(公告)日：2015-01-20

申请号：US13841232

申请日：2013-03-15

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jun-Woo Kim ,  Hyeong Sook Park ,  Hoon Lee ,  Seungjae Bahng ,  Youn Ok Park

IPC: H04J3/06 ,  H04W56/00 ,  H04W48/20

CPC classification number: H04W56/001 ,  H04W48/20 ,  H04W56/00 ,  H04W56/005

Abstract: There is provided a method for acquiring and modifying uplink and downlink synchronization, by which, if there is a possibility of ISI occurring due to incorrect downlink synchronization of a terminal with a base station, the terminal receives a ranging response from the base station, modifies incorrect downlink synchronization, and acquires uplink synchronization in accordance with modified downlink synchronization. The method for acquiring and modifying uplink and downlink synchronization efficiently prevents, in a cooperative communication network, discrepancy in signal transmission synchronization between the base stations, excessive attenuation of a transmitted signal, or a delay caused by a difference in reflection paths.

Abstract translation: 提供了一种用于获取和修改上行链路和下行链路同步的方法，通过该方法，如果由于具有基站的终端的下行链路同步不正确而发生ISI的可能性，则终端从基站接收测距响应，修改 不正确的下行链路同步，并根据修改的下行链路同步获取上行链路同步。 用于获取和修改上行链路和下行链路同步的方法在协作通信网络中有效地防止了基站之间的信号传输同步的差异，发射信号的过度衰减或由反射路径的差异引起的延迟。