公开(公告)号：US20150126239A1

公开(公告)日：2015-05-07

申请号：US14399926

申请日：2012-12-27

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hee Wook Kim ,  Kun Seok Kang ,  Bon Jun Ku ,  Do Seob Ahn

IPC: H04W52/14

CPC classification number: H04W52/146 ,  H04W52/143 ,  H04W52/325

Abstract: Provided is a power control and link adaptation method for compensating for a long round trip delay time and slow channel fading in a long term evolution (LTE)-based mobile communication system having a long round trip delay time, similar to a satellite mobile system, the method that may compensate for the long round trip delay time of the satellite mobile system in which a distance between a base station and a terminal is relatively long, when compared to a terrestrial LTE system, support a modulation and coding scheme (MCS) level requested by a terminal, by predicting a channel after the round trip delay time elapses, maintain compatibility within an existing LTE frame, by generating a transmit power control (TPC) instruction for an uplink closed-loop power control, on a frame by frame basis, and compensate for slow channel fading of the satellite mobile system.

Abstract translation: 提供了一种功率控制和链路自适应方法，用于补偿具有长的往返延迟时间的长期演进（LTE）移动通信系统中的长的往返延迟时间和慢的信道衰落，类似于卫星移动系统， 与地面LTE系统相比，可以补偿基站和终端之间的距离相对较长的卫星移动系统的长往返延迟时间的方法支持调制和编码方案（MCS）级 由终端请求，通过在往返延迟时间之后预测信道，通过在逐帧的基础上生成上行链路闭环功率控制的发射功率控制（TPC）指令，保持现有LTE帧内的兼容性 并补偿卫星移动系统的慢速信道衰落。

公开(公告)号：US09094985B2

公开(公告)日：2015-07-28

申请号：US13779033

申请日：2013-02-27

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Hee Wook Kim ,  KunSeok Kang ,  Bon Jun Ku ,  Do-Seob Ahn

IPC: H04B7/00 ,  H04W72/08 ,  H04B7/185 ,  H04B7/04 ,  H04B7/06 ,  H04W72/04

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。

公开(公告)号：US20150103723A1

公开(公告)日：2015-04-16

申请号：US14399922

申请日：2012-12-11

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hee Wook Kim ,  Kun Seok Kang ,  Bon Jun Ku ,  Do Seob Ahn

IPC: H04W52/36 ,  H04L27/26 ,  H04B7/185 ,  H04W4/06

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。

公开(公告)号：US09538554B2

公开(公告)日：2017-01-03

申请号：US14399903

申请日：2012-12-10

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hee Wook Kim ,  Kun Seok Kang ,  Bon Jun Ku ,  Do Seob Ahn

IPC: H04W4/00 ,  H04W74/08 ,  H04W28/04 ,  H04L5/00 ,  H04W72/04 ,  H04W72/12

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。

公开(公告)号：US20150146631A1

公开(公告)日：2015-05-28

申请号：US14399903

申请日：2012-12-10

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hee Wook Kim ,  Kun Seok Kang ,  Bon Jun Ku ,  Do Seob Ahn

IPC: H04W74/08

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限制终端及其前导码结构。 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。

公开(公告)号：US09544160B2

公开(公告)日：2017-01-10

申请号：US14399922

申请日：2012-12-11

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hee Wook Kim ,  Kun Seok Kang ,  Bon Jun Ku ,  Do Seob Ahn

IPC: H04J11/00 ,  H04L12/18 ,  H04W4/06 ,  H04L27/26 ,  H04B7/185 ,  H04L5/00 ,  H04L12/58

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。

公开(公告)号：US09277505B2

公开(公告)日：2016-03-01

申请号：US14399926

申请日：2012-12-27

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hee Wook Kim ,  Kun Seok Kang ,  Bon Jun Ku ,  Do Seob Ahn

IPC: H04B7/00 ,  H04W52/14 ,  H04W52/32

CPC classification number: H04W52/146 ,  H04W52/143 ,  H04W52/325

Abstract: Provided is a power control and link adaptation method for compensating for a long round trip delay time and slow channel fading in a long term evolution (LTE)-based mobile communication system having a long round trip delay time, similar to a satellite mobile system, the method that may compensate for the long round trip delay time of the satellite mobile system in which a distance between a base station and a terminal is relatively long, when compared to a terrestrial LTE system, support a modulation and coding scheme (MCS) level requested by a terminal, by predicting a channel after the round trip delay time elapses, maintain compatibility within an existing LTE frame, by generating a transmit power control (TPC) instruction for an uplink closed-loop power control, on a frame by frame basis, and compensate for slow channel fading of the satellite mobile system.

Abstract translation: 提供了一种功率控制和链路自适应方法，用于补偿具有长的往返延迟时间的长期演进（LTE）移动通信系统中的长的往返延迟时间和慢的信道衰落，类似于卫星移动系统， 与地面LTE系统相比，可以补偿基站和终端之间的距离相对较长的卫星移动系统的长往返延迟时间的方法支持调制和编码方案（MCS）级 由终端请求，通过在往返延迟时间之后预测信道，通过在逐帧的基础上生成上行链路闭环功率控制的发射功率控制（TPC）指令，保持现有LTE帧内的兼容性 并补偿卫星移动系统的慢速信道衰落。