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11.发明授权公开(公告)号：US10429836B2
公开(公告)日：2019-10-01
申请号：US15609213
申请日：2017-05-31
Inventor： Tae Chul Hong , Hee Wook Kim , Kwang Jae Lim
Abstract: A channel access method in an unmanned aerial vehicle (UAV) control and non-payload communication (CNPC) system is provided. The channel access method may include setting an uplink frequency and a downlink frequency to each of a ground station and an airborne radio station, and performing, by the ground station and the airborne radio station, an initial access using the uplink frequency or the downlink frequency.
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12.发明授权Random access method and random access channel structure in mobile communication system having large cell radius 有权具有大小区半径的移动通信系统中的随机接入方法和随机接入信道结构公开(公告)号：US09538554B2
公开(公告)日：2017-01-03
申请号：US14399903
申请日：2012-12-10
Inventor： Hee Wook Kim , Kun Seok Kang , Bon Jun Ku , Do Seob Ahn
CPC classification number: H04W74/0833 , H04L5/00 , H04L5/0007 , H04L5/0053 , H04W28/04 , H04W72/04 , H04W72/12 , Y02D70/1262
Abstract: A random access method in a mobile communication system, the random access method for supporting random access with a cell size of about 100 kilometers (km) or more and a power limited terminal, and a preamble structure thereof are provided. While a conventional long term evolution (LTE) random access preamble sequence is reused, a difference in a round-trip delay time between terminals in a large cell area may be compensated. Additionally, since higher power transmission is achieved per bandwidth, a higher link margin may be secured. Also, compatibility with resource scheduling of the conventional LTE may be maintained. Random access may be supported in a large cell, and a preamble structure of a satellite mobile communication may be implemented based on terrestrial LTE.
Abstract translation: 提供了一种移动通信系统中的随机接入方法，提供了用于支持大约100千米（km）以上的小区大小的随机接入的随机接入方法和功率受限终端，以及其前导码结构。 虽然传统的长期演进（LTE）随机接入前导码序列被重用，但可以补偿大小区域中的终端之间的往返延迟时间的差异。 此外，由于每个带宽实现更高的功率传输，所以可以确保更高的链路余量。 此外，可以保持与常规LTE的资源调度的兼容性。 可以在大小区中支持随机接入，并且可以基于地面LTE来实现卫星移动通信的前导码结构。
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Patent Agency Ranking
公开(公告)号：US09432107B2
公开(公告)日：2016-08-30
申请号：US14835332
申请日：2015-08-25
Inventor： Hee Wook Kim
CPC classification number: H04B7/185 , H04B7/0678 , H04L5/0048 , H04W52/32
Abstract: 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.
Abstract translation: 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。
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公开(公告)号：US10104708B2
公开(公告)日：2018-10-16
申请号：US15371745
申请日：2016-12-07
Inventor： Hee Wook Kim , Jae Young Ahn
Abstract: Disclosed are methods for communication channel setting and connection establishment in a new UAS CNPC system which can dynamically allocate a UA controlling a communication frequency resource to efficiently operate multiple UAs to channels in a limited UA control dedicated frequency band in a national airspace and be applied even to a next-generation P2MP type CNPC system, in order to stably operate the UA and extend the demand of the UA. That is, the present invention has been made in an effort to provide a method for setting a UA controlling communication channel between a ground radio station (GRS) and an unmanned aircraft (UA), which is used for supporting dynamic allocation and management of a UA controlling communication channel and a procedure for establishing connection of a UA controlling communication channel among a ground control system (GCS), the ground radio station (GRS), and the unmanned aircraft (UA).
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公开(公告)号：US10084615B2
公开(公告)日：2018-09-25
申请号：US15607889
申请日：2017-05-30
Inventor： Tae Chul Hong , Hee Wook Kim , Kwang Jae Lim
CPC classification number: H04L12/56 , H04B7/185 , H04W36/08 , H04W36/16 , H04W36/28 , H04W72/0406 , H04W84/045 , H04W84/06
Abstract: 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.
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16.发明授权Communication method and beam forming apparatus in multi-cell mobile communication system 有权多小区移动通信系统中的通信方法和波束形成装置公开(公告)号：US09094985B2
公开(公告)日：2015-07-28
申请号：US13779033
申请日：2013-02-27
Inventor： Hee Wook Kim , KunSeok Kang , Bon Jun Ku , Do-Seob Ahn
CPC classification number: H04W72/08 , H04B7/0408 , H04B7/0491 , H04B7/0617 , H04B7/18513 , H04W72/042 , H04W72/044 , H04W72/0453 , H04W72/046
Abstract: 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.
Abstract translation: 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。
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17.发明申请METHOD FOR ENHANCED UPLINK TRANSMISSION HAVING LOW PAPR IN LTE-BASED MOBILE COMMUNICATION SYSTEM 有权基于LTE的移动通信系统中低PAPR的增强上行传输方法公开(公告)号：US20150103723A1
公开(公告)日：2015-04-16
申请号：US14399922
申请日：2012-12-11
Inventor： Hee Wook Kim , Kun Seok Kang , Bon Jun Ku , Do Seob Ahn
CPC classification number: H04L12/189 , H04B7/18513 , H04B7/18517 , H04B7/18563 , H04L5/0007 , H04L5/0037 , H04L5/0051 , H04L5/0053 , H04L27/2602 , H04L27/2614 , H04L51/10 , H04W4/06
Abstract: Provided is a communication method for downlink transmission with a low peak to average power ratio (PAPR) and compatibility with long-term evolution (LTE)-based downlink transmission in an LTE-based mobile communication system in which the performance degradation may occur due to a high PAPR in multi-carrier transmission caused by non-linearity of a power amplifier in a base station including a satellite, to have the effects of supporting a terminal that reuses an existing terrestrial LTE chipset and a terminal that enables downlink reception with a low PAPR with no collision between the terminals, and of implementing an integrated satellite/terrestrial mobile communication system with a minimum change of an existing mobile communication system to ensure economic efficiency.
Abstract translation: 提供了一种用于在基于LTE的移动通信系统中具有低峰值平均功率比（PAPR）和与基于长期演进（LTE）的下行链路传输的兼容性的下行链路传输的通信方法，其中由于 由包括卫星的基站中的功率放大器的非线性引起的多载波传输中的高PAPR，具有支持使现有的地面LTE芯片组重新使用的终端的效果和能够以低的速率进行下行链路接收的终端 PAPR，终端之间没有冲突，并且实施了集成的卫星/地面移动通信系统，其中现有移动通信系统的变化最小化，以确保经济效率。
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