公开(公告)号：US20240048264A1

公开(公告)日：2024-02-08

申请号：US18365356

申请日：2023-08-04

申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

发明人： Hee Wook KIM

IPC分类号： H04J13/00 ,  H04J13/16 ,  H04L5/00

CPC分类号： H04J13/0048 ,  H04J13/16 ,  H04L5/0048

摘要： A method of a base station may comprise: mapping at least one port of the base station to each of a plurality of user equipments (UEs) to be overloaded; configuring overloading signatures for a code division multiplexing (CDM) scheme; mapping the overloading signatures with the plurality of UEs to be overloaded, respectively; transmitting a message including configuration information of the overloading signatures to the plurality of UEs; and transmitting, to the plurality of UEs, signals multiplexed by the CDM scheme using the overloading signatures.

公开(公告)号：US20190013969A1

公开(公告)日：2019-01-10

申请号：US16104467

申请日：2018-08-17

申请人： Electronics and Telecommunications Research Institute

发明人： Tae Chul HONG ,  Hee Wook KIM ,  Kwang Jae LIM

IPC分类号： H04L12/54 ,  H04B7/185 ,  H04W36/28 ,  H04W36/16 ,  H04W72/04 ,  H04W36/08 ,  H04W84/04

摘要： A handover method and a control transfer method are provided. A handover method of performing an inter-cell handover between a first ground station and a second ground station may include setting a first channel to the second ground station, measuring, by an airborne radio station, a second channel and reporting a measurement result to the first ground station, sending, by the first ground station, a handover request to at least one of a ground control station (GCS) or a control and non-payload communication (CNPC) network, determining, by the at least one of the GCS or the CNPC network, whether to perform a handover, and transmitting, by the at least one of the GCS or the CNPC network, a handover instruction to the airborne radio station based on a result of the determining.

公开(公告)号：US20180139074A1

公开(公告)日：2018-05-17

申请号：US15607889

申请日：2017-05-30

申请人： Electronics and Telecommunications Research Institute

发明人： Tae Chul HONG ,  Hee Wook KIM ,  Kwang Jae LIM

IPC分类号： H04L12/54 ,  H04W36/08 ,  H04W84/04 ,  H04W72/04 ,  H04W36/16 ,  H04W36/28

CPC分类号： H04L12/56 ,  H04B7/185 ,  H04W36/08 ,  H04W36/16 ,  H04W36/28 ,  H04W72/0406 ,  H04W84/045

摘要： A handover method and a control transfer method are provided. A handover method of performing an inter-cell handover between a first ground station and a second ground station may include setting a first channel to the second ground station, measuring, by an airborne radio station, a second channel and reporting a measurement result to the first ground station, sending, by the first ground station, a handover request to at least one of a ground control station (GCS) or a control and non-payload communication (CNPC) network, determining, by the at least one of the GCS or the CNPC network, whether to perform a handover, and transmitting, by the at least one of the GCS or the CNPC network, a handover instruction to the airborne radio station based on a result of the determining.

公开(公告)号：US20170215178A1

公开(公告)日：2017-07-27

申请号：US15394151

申请日：2016-12-29

申请人： Electronics and Telecommunications Research Institute

发明人： Hee Wook KIM ,  Jae Young AHN

IPC分类号： H04W72/04 ,  G08G5/00

CPC分类号： H04W72/048 ,  G08G5/0013 ,  G08G5/0069 ,  H04W72/0453

摘要： A dynamic channel assignment method includes receiving, at a ground control station (GCS), assignment of a first communication channel set from a spectrum authority before takeoff of the unmanned aircraft; receiving, at the GCS, assignment of a second communication channel set when the unmanned aircraft is to move from a first area using the first communication channel set to a second area using the second communication channel set due to a flight plan of the unmanned aircraft after takeoff of the unmanned aircraft; and after the unmanned aircraft enters the second area, maintaining, at the GCS, the first communication channel set when the unmanned aircraft reenters the first area due to the flight plan, and returning, at the GCS, the first communication channel set to the spectrum authority when the unmanned aircraft does not reenter the first area due to the flight plan.

公开(公告)号：US20180160433A1

公开(公告)日：2018-06-07

申请号：US15827527

申请日：2017-11-30

申请人： Electronics and Telecommunications Research Institute

发明人： Hee Wook KIM ,  Kwang Jae LIM ,  Tae Chul HONG

IPC分类号： H04W72/08 ,  H04W72/04 ,  H04B7/185

CPC分类号： H04W72/082 ,  H04B7/18504 ,  H04W72/0406 ,  H04W72/0446

摘要： Disclosed is a channel assignment method of a communication system for controlling an unmanned aerial vehicle (UAV), the method including receiving assignment data and an interference analysis criterion from a spectrum authority; performing an interference analysis and selecting a control and non-payload communication (CNPC) channel based on the assignment data and the interference analysis criterion; and requesting the spectrum authority for assigning the CNPC channel.

公开(公告)号：US20160261334A1

公开(公告)日：2016-09-08

申请号：US15060903

申请日：2016-03-04

申请人： Electronics and Telecommunications Research Institute

发明人： Hee Wook KIM

IPC分类号： H04B7/185 ,  H04B7/04

CPC分类号： H04B7/18513 ,  H04B7/0413 ,  H04B7/0671

摘要： Provided a method and a system for increasing system capacity in a multibeam satellite communication system. A signal transmission method of a multilayer-based multibeam structure of a satellite communication system may include generating a multilayer-based multibeam structure; selecting two or more layers for forming a single frequency selective channel; generating a transmission signal by applying the same channel encoding scheme to the two or more selected layer; and transmitting the transmission signal.

摘要翻译： 提供了一种用于增加多波束卫星通信系统中的系统容量的方法和系统。 卫星通信系统的基于多层的多波束结构的信号传输方法可以包括生成基于多层的多波束结构; 选择用于形成单个频率选择性信道的两个或更多个层; 通过将相同的信道编码方案应用于两个或更多个所选择的层来产生传输信号; 并发送发送信号。

公开(公告)号：US20160127032A1

公开(公告)日：2016-05-05

申请号：US14835332

申请日：2015-08-25

申请人： Electronics and Telecommunications Research Institute

发明人： Hee Wook KIM

IPC分类号： H04B7/185 ,  H04W52/32 ,  H04B7/06 ,  H04W72/04 ,  H04L5/00

CPC分类号： H04B7/185 ,  H04B7/0678 ,  H04L5/0048 ,  H04W52/32

摘要： Disclosed is a low-rate data transmission method in an LTE based satellite radio interface, which can secure a large number of low-rate data channels which can simultaneously access and increase frequency efficiency while providing compatibility with the existing LTE radio interface through a transmission technique which can secure more link margins in communication between portable terminals (handheld type terminals) without changing a basic LTE transmission frame structure in a satellite system requiring high transmission power.

摘要翻译： 公开了一种基于LTE的卫星无线接口中的低速率数据传输方法，其可以确保大量的低速率数据信道，其可以同时访问并提高频率效率，同时通过传输技术提供与现有LTE无线电接口的兼容性 这可以在不改变需要高发送功率的卫星系统中的基本LTE传输帧结构的情况下，在便携式终端（手持式终端）之间的通信中确保更多的链路余量。

公开(公告)号：US20130252655A1

公开(公告)日：2013-09-26

申请号：US13779033

申请日：2013-02-27

申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

发明人： Hee Wook KIM ,  KunSeok KANG ,  Bon Jun KU ,  Do-Seob AHN

IPC分类号： H04W72/08

CPC分类号： H04W72/08 ,  H04B7/0408 ,  H04B7/0491 ,  H04B7/0617 ,  H04B7/18513 ,  H04W72/042 ,  H04W72/044 ,  H04W72/0453 ,  H04W72/046

摘要： In a system that performs mobile communication using at least two beams, by determining a size of a beam based on information that is acquired for mobile terminals attempting an access, a beam of a form having an adaptive size is formed and thus communication is performed. A beam sector including a plurality of beam segments and a beam segment that forms a beam of a minimum size within entire coverage is set, and while forming one beam per beam sector, a size of a beam is adaptively determined.

摘要翻译： 在使用至少两个波束执行移动通信的系统中，通过基于尝试访问的移动终端获得的信息确定波束的大小，形成具有自适应大小的形式的波束，从而进行通信。 设置包括多个光束段的光束扇区和在整个覆盖范围内形成最小尺寸的光束的光束段，并且在每个光束扇区形成一个光束的同时，自适应地确定光束的大小。

公开(公告)号：US20220407588A1

公开(公告)日：2022-12-22

申请号：US17526666

申请日：2021-11-15

申请人： Electronics and Telecommunications Research Institute

发明人： Hee Wook KIM

IPC分类号： H04B7/185 ,  H04W76/15

摘要： An operation method of a first communication node may comprise: establishing a first wireless connection with a GCS; establishing a second wireless connection with the GCS; transmitting and receiving data to and from the GCS through a first end-to-end connection based on the first wireless connection; reporting a communication quality of the first wireless connection to the GCS; receiving a link switch request from the GCS; switching a link from the first wireless connection to the second wireless connection based on the link switch request; and transmitting and receiving data through a second end-to-end connection based on the second wireless connection.

公开(公告)号：US20210282129A1

公开(公告)日：2021-09-09

申请号：US17326237

申请日：2021-05-20

申请人： Electronics and Telecommunications Research Institute

发明人： Hee Wook KIM ,  Jae Young AHN

IPC分类号： H04W72/04

摘要： A dynamic channel assignment method includes receiving, at a ground control station (GCS), assignment of a first communication channel set from a spectrum authority before takeoff of the unmanned aircraft; receiving, at the GCS, assignment of a second communication channel set when the unmanned aircraft is to move from a first area using the first communication channel set to a second area using the second communication channel set due to a flight plan of the unmanned aircraft after takeoff of the unmanned aircraft; and after the unmanned aircraft enters the second area, maintaining, at the GCS, the first communication channel set when the unmanned aircraft reenters the first area due to the flight plan, and returning, at the GCS, the first communication channel set to the spectrum authority when the unmanned aircraft does not reenter the first area due to the flight plan.