公开(公告)号：US09872277B2

公开(公告)日：2018-01-16

申请号：US14948554

申请日：2015-11-23

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hyeong Sook Park ,  Yong Su Lee ,  Youn Ok Park

IPC: H04W72/04 ,  H04W72/02 ,  H04W56/00 ,  H04B17/318 ,  H04B7/08 ,  H04B17/327 ,  H04B17/364 ,  H04B7/0404

CPC classification number: H04W72/02 ,  H04B7/0404 ,  H04B7/0408 ,  H04B7/088 ,  H04B17/318 ,  H04B17/327 ,  H04B17/364 ,  H04W56/0065

Abstract: The exemplary embodiment of the present invention provides a beam selecting apparatus of a fixed beam terminal, including: a delay time measuring unit which measures delay times of a plurality of signals received through a plurality of beams; a beam selecting unit which compares a threshold value selected based on the measured delay time and a signal strength of each of the plurality of signals to select a beam; and a switching type beam former which operates the plurality of beams in accordance with the selected beam.

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：US11637725B2

公开(公告)日：2023-04-25

申请号：US17541143

申请日：2021-12-02

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Hyeong Sook Park

IPC: H04L25/03 ,  H04L1/00

Abstract: An operation method of a receiving apparatus may comprise: receiving an N-th data block belonging to a frame including a plurality of data blocks from a transmitting apparatus, each of the plurality of data blocks including a data period and a UW period; storing a first UW received in a UW period of the N-th data block in a buffer; receiving an (N+1)-th data block belonging to the frame from the transmitting apparatus; estimating a phase noise in a time domain by combining the first UW with a second UW received in a UW period of the (N+1)-th data block; and applying time-domain compensation according to the estimated phase noise to the (N+1)-th data block, and demodulating data of the (N+1)-th data block, wherein the first UW and the second UW are configured with a same sequence.

公开(公告)号：US09609633B2

公开(公告)日：2017-03-28

申请号：US14609940

申请日：2015-01-30

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Hyeong Sook Park ,  Jun Woo Kim ,  Youn Ok Park

IPC: H04W72/04 ,  H04W74/08

CPC classification number: H04W72/0413 ,  H04W74/0866

Abstract: The present invention relates to a data transmitting method using a bandwidth request channel and a user terminal and a base station conducting the same. The present invention provides a communication method by a user terminal which transmits data to a base station via a bandwidth request channel, including: generating a preamble for bandwidth request; determining whether a message for the bandwidth request is generated; generating a first signal value to be operated with the preamble when it is determined that the message is generated and generating a second signal value to be operated with the preamble when it is determined that the message is not generated; operating the preamble with the generated first signal value or second signal value; and transmitting a signal including the operated preamble to the base station, thereby reducing overhead occurring when the bandwidth request information is demodulated.

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。