公开(公告)号：US20170111090A1

公开(公告)日：2017-04-20

申请号：US15128695

申请日：2015-03-24

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Junyoung NAM ,  Young Jo KO

IPC: H04B7/04 ,  H04B7/02 ,  H04B17/24 ,  H04L5/00 ,  H04B17/336

CPC classification number: H04B7/0417 ,  H04B7/024 ,  H04B7/0452 ,  H04B7/0632 ,  H04L5/0048 ,  H04L5/006 ,  H04W84/045

Abstract: Disclosed herein are a terminal and a base station in a distributed antenna system and an operation method thereof. A base station may include first and second transmitter points positioned at different places. The base station transmits a reference signal for channel quality measurement to the terminal. The terminal calculates a first value that is a ratio of a signal transmitted to the terminal and noise based on the received reference signal. Further, the terminal calculates a second value that is a ratio of interference by a first transmitter point and noise and a third value that is a ratio of interference by a second transmitter point and noise, based on the received reference signal. The terminal transmits information on the first to third values to the base station.

公开(公告)号：US20170099599A1

公开(公告)日：2017-04-06

申请号：US15380603

申请日：2016-12-15

Applicant: Electronics and Telecommunications Research Institute

Inventor： Young Jo KO ,  Jae Young AHN ,  Tae Gyun NOH ,  Bang Won SEO

IPC: H04W8/00 ,  H04W76/02 ,  H04W72/04 ,  H04L5/00 ,  H04L12/26

CPC classification number: H04W8/005 ,  H04L5/0035 ,  H04L5/0048 ,  H04L5/0082 ,  H04L5/14 ,  H04L43/0864 ,  H04W72/042 ,  H04W72/0446 ,  H04W72/0453 ,  H04W76/14 ,  H04W84/042 ,  H04W92/18

Abstract: A discovery method for device to device communication between terminals is disclosed. The discovery method for the device to device communication between terminals comprises the steps of: performing transmission in a first sub-frame; transmitting a discovery channel through a preset section in a second sub-frame located next to the first sub-frame; and performing transmission in a third sub-frame next to the second sub-frame. Therefore, the present invention can transmit and receive the discovery channel without colliding with other data.

公开(公告)号：US20170026922A1

公开(公告)日：2017-01-26

申请号：US15286600

申请日：2016-10-06

Applicant: Electronics and Telecommunications Research Institute

Inventor： Il Gyu KIM ,  Hyeong Geun PARK ,  Young Jo KO ,  Kapseok CHANG ,  Hyo Seok YI ,  Young Hoon KIM ,  Seung Chan BANG

IPC: H04W56/00 ,  H04J11/00 ,  H04L27/26

CPC classification number: H04W56/001 ,  H04J11/0069 ,  H04J11/0093 ,  H04L5/0037 ,  H04L5/005 ,  H04L5/0053 ,  H04L27/2613 ,  H04L27/2655 ,  H04L27/2675 ,  H04W36/0061 ,  H04W36/08 ,  H04W56/00

Abstract: A method of searching a cell in a mobile station of a communication system in which a plurality of cells are grouped into a plurality of cell groups, each cell group including at least two cells, includes: detecting a primary synchronization signal and a secondary synchronization signal from a received signal; and identifying a cell based on a combination of the primary synchronization signal and the secondary synchronization signal. The secondary synchronization signal is related to the cell group to which the mobile station belongs and the primary synchronization signal is related to the cell to which the mobile station belongs within the cell group.

Abstract translation: 一种搜索其中多个小区被分组成多个小区组的通信系统的移动站中的小区的方法，每个小区组包括至少两个小区，包括：检测主同步信号和辅同步信号 从接收到的信号; 以及基于所述主同步信号和所述次同步信号的组合来识别小区。 次同步信号与移动站所属的小区组相关，主同步信号与移动站所属小区相关。

公开(公告)号：US20160338079A1

公开(公告)日：2016-11-17

申请号：US15154484

申请日：2016-05-13

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Choongil YEH ,  Young Jo KO ,  Kyoung Seok LEE

IPC: H04W72/10 ,  H04W72/04 ,  H04W72/12

CPC classification number: H04W72/10

Abstract: The present invention relates to a method and an apparatus for controlling priority in device-to-device communications. A plurality of transmission resources are classified into resource index sets depending on indexes, and a priority given to a communication object to which a device communication is applied is determined. One resource index set is allocated to a device of the communication object depending on the priority of the communication object.

Abstract translation: 本发明涉及用于控制设备到设备通信中的优先级的方法和装置。 多个传输资源根据索引被分类为资源索引集，并且确定给予应用了设备通信的通信对象的优先级。 一个资源索引集根据通信对象的优先级被分配给通信对象的设备。

公开(公告)号：US20160330678A1

公开(公告)日：2016-11-10

申请号：US15148108

申请日：2016-05-06

Applicant: Electronics and Telecommunications Research Institute

Inventor： Chanho YOON ,  Young Jo KO ,  Eunkyung KIM ,  Seung-Kwon BAEK

IPC: H04W48/16 ,  H04W74/00 ,  H04W72/04 ,  H04W8/00 ,  H04W16/14

CPC classification number: H04W74/006 ,  H04L5/0007 ,  H04L5/001 ,  H04L5/0051 ,  H04W16/14 ,  H04W48/12 ,  H04W84/045

Abstract: Disclosed is a method for a base station to transmit a discovery reference signal (DRS) through a channel of an unlicensed band. The base station attempts a first access to the channel of the unlicensed band so as to transmit a first DRS in a first DRS measurement timing configuration (DMTC) period. When the first access fails, the base station attempts a second access to the channel of the unlicensed band with a shorter predetermined period than the first DMTC period so as to transmit a second DRS in the first DMTC period.

Abstract translation: 公开了一种用于基站通过未许可频带的信道发送发现参考信号（DRS）的方法。 基站尝试对未许可频带的信道的第一次接入，以便在第一DRS测量定时配置（DMTC）周期中发送第一DRS。 当第一接入失败时，基站以比第一DMTC周期更短的预定周期尝试第二次接入非许可频带的信道，以便在第一DMTC周期中发送第二DRS。

公开(公告)号：US20160057740A1

公开(公告)日：2016-02-25

申请号：US14930763

申请日：2015-11-03

Applicant: Electronics and Telecommunications Research Institute

Inventor： Young Jo KO ,  Bang Won SEO ,  Jae Young AHN

IPC: H04W72/04

CPC classification number: H04W72/042 ,  H04L1/0045 ,  H04L1/0061 ,  H04L5/001 ,  H04L5/0053 ,  H04W4/00 ,  H04W72/046 ,  H04W88/02 ,  H04W88/08

Abstract: Data transmission and reception is provided by configuring control channels in a wireless communication system using a plurality of carriers. User equipment (UE) may monitor physical downlink control channel (PDCCH) candidates within common search spaces (CSSs) and User Equipment-specific search spaces (USSs). If the UE is configured with cross-carrier scheduling, when two PDCCH candidates originating from a CSS and a USS, respectively, have cyclic redundancy check (CRC) scrambled by the same Radio Network Temporary Identifier (RNTI) and have a common payload size and the same first control channel element (CCE) index, the UE may interpret that only the PDCCH originating from the CSS is transmitted, thereby solving ambiguity of downlink control information (DCI) detection.

公开(公告)号：US20150358899A1

公开(公告)日：2015-12-10

申请号：US14763092

申请日：2014-01-24

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Young Jo KO ,  Jae Young AHN ,  Bangwon Seo

IPC: H04W48/16 ,  H04W24/08 ,  H04W72/04

CPC classification number: H04W48/16 ,  H04J11/0069 ,  H04J2211/001 ,  H04W24/08 ,  H04W48/12 ,  H04W56/00 ,  H04W72/042 ,  H04W84/045

Abstract: Disclosed is a method for cell discovery. In a network in which a macro cell overlaps at least one small cell, when the carrier frequency used by the macro cell is different from the carrier frequency used by the small cell, the small cell transmits a discovery signal using the carrier frequency used by the macro cell, or the small cell transmits a discovery signal using a carrier frequency of the small cell that is different from the carrier frequency used by the macro cell.

Abstract translation: 公开了一种用于细胞发现的方法。 在宏小区与至少一个小小区重叠的网络中，当宏小区使用的载波频率与小小区所使用的载波频率不同时，小小区使用由该小区使用的载波频率来发送发现信号 宏小区或小小区使用与宏小区使用的载波频率不同的小小区的载波频率来发送发现信号。

公开(公告)号：US20150333858A1

公开(公告)日：2015-11-19

申请号：US14792822

申请日：2015-07-07

Applicant: Electronics and Telecommunications Research Institute

Inventor： Il Gyu KIM ,  Hyeong Geun PARK ,  Young Jo KO ,  Kapseok CHANG ,  Hyo Seok YI ,  Young Hoon KIM ,  Seung Chan BANG

IPC: H04J11/00 ,  H04L27/26

CPC classification number: H04W56/001 ,  H04J11/0069 ,  H04J11/0093 ,  H04L5/0037 ,  H04L5/005 ,  H04L5/0053 ,  H04L27/2613 ,  H04L27/2655 ,  H04L27/2675 ,  H04W36/0061 ,  H04W36/08 ,  H04W56/00

Abstract: A method of and an apparatus therefor searching a cell in a mobile station of a communication system in which a plurality of cells are grouped into a plurality of cell groups, and each cell group includes at least two cells. The method includes detecting a primary synchronization signal and a secondary synchronization signal from a received signal, and identifying a cell based on a combination of the primary synchronization signal and the secondary synchronization signal. The secondary synchronization signal is related to the cell group to which the mobile station belongs and the primary synchronization signal is related to the cell to which the mobile station belongs within the cell group.

Abstract translation: 一种用于搜索其中多个小区被分组成多个小区组的通信系统的移动站中的小区的方法和装置，并且每个小区组包括至少两个小区。 该方法包括从接收信号检测主同步信号和次同步信号，以及基于主同步信号和次同步信号的组合来识别小区。 次同步信号与移动站所属的小区组相关，主同步信号与移动站所属小区相关。

公开(公告)号：US20150222404A1

公开(公告)日：2015-08-06

申请号：US14687448

申请日：2015-04-15

Applicant: Electronics and Telecommunications Research Institute

Inventor： Byung Jang JEONG ,  Young Jo KO ,  Bang Won SEO ,  Jae Young AHN

IPC: H04L5/00 ,  H04L27/26 ,  H04W72/04

CPC classification number: H04L5/0048 ,  H04L5/0007 ,  H04L27/2607 ,  H04L27/265 ,  H04W72/0413

Abstract: Disclosed is a method for generating and transmitting a reference signal in a clustered DFT-spread OFDM transmission scheme. A method for generating and transmitting a DM-RS in a clustered DFT-spread-OFDM scheme comprises: a step of generating DM-RS sequences corresponding to the number of clusters allocated for an uplink transmission; and a step of mapping the generated DM-RS sequences to the relevant DM-RS symbol positions for each cluster. Accordingly, the method for generating and transmitting a reference signal according to the present invention, in which DM-RS sequences are allocated and transmitted on a cluster basis, uses a complete DM-RS sequence for each cluster, and therefore inter-cell interference can be weakened, and problems which might occur when applied to a multi-user MIMO (MU-MIMO) scheme can be solved.

Abstract translation: 公开了一种用于在聚集的DFT扩展OFDM传输方案中产生和发送参考信号的方法。 一种用于在聚簇DFT扩展OFDM方案中产生和发送DM-RS的方法包括：产生对应于为上行链路传输分配的簇数量的DM-RS序列的步骤; 以及将生成的DM-RS序列映射到每个簇的相关DM-RS符号位置的步骤。 因此，根据本发明的基于簇分配和发送DM-RS序列的参考信号的生成和发送方法对于每个簇使用完整的DM-RS序列，因此小区间干扰可以 被削弱，并且可以解决当应用于多用户MIMO（MU-MIMO）方案时可能出现的问题。

公开(公告)号：US20150215856A1

公开(公告)日：2015-07-30

申请号：US14603968

申请日：2015-01-23

Applicant: Electronics and Telecommunications Research Institute

Inventor： Cheulsoon KIM ,  Young Jo KO ,  Joonwoo SHIN ,  Sung-Hyun MOON

IPC: H04W48/16 ,  H04W24/08

CPC classification number: H04W48/16 ,  H04W24/08 ,  H04W84/045

Abstract: In an environment in which a macrocell and a plurality of small cells exist, a terminal receives a discovery signal from a first small cell adjacent to the terminal among the plurality of small cells. When the first small cell is in a predetermined state, the terminal measures RRM of the first small cell based on the discovery signal.

Abstract translation: 在存在宏小区和多个小小区的环境中，终端从多个小小区中的与终端相邻的第一小区接收发现信号。 当第一小区处于预定状态时，终端基于发现信号测量第一小区的RRM。