公开(公告)号：US09674860B2

公开(公告)日：2017-06-06

申请号：US14178960

申请日：2014-02-12

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hyun Gu Park ,  Sok Kyu Lee

IPC: H04W72/12 ,  H04N21/85 ,  H04N21/8547 ,  H04L12/851 ,  H04L12/841 ,  H04L12/823 ,  H04L29/08

CPC classification number: H04W72/1242 ,  H04L47/2441 ,  H04L47/28 ,  H04L47/32 ,  H04L67/325 ,  H04N21/8547

Abstract: Provided is a method and apparatus for efficient aggregation scheduling in a wireless local area network (WLAN) system, the apparatus including a delay setting unit to set a required delay time for each access category (AC), a storing unit to store a traffic identification (TID) of a packet in a queue of a corresponding AC when the packet arrives, a delay time calculator to calculate a maximum delay time predicted when the packet arriving at the queue is configured to be an A-MPDU and the configured A-MPDU is transmitted, and an A-MPDU configuring unit to compare the calculated maximum delay time and the required delay time, and configure a corresponding A-MPDU when the calculated maximum delay time is greater than the required delay time.

公开(公告)号：US07468592B2

公开(公告)日：2008-12-23

申请号：US11633179

申请日：2006-12-04

Applicant: Eul Gyoon Lim ,  Seung Min Choi ,  Dae Hwan Hwang

Inventor： Eul Gyoon Lim ,  Seung Min Choi ,  Dae Hwan Hwang

IPC: B25J5/00

CPC classification number: B25J5/007 ,  B62D37/04 ,  Y10S180/907

Abstract: An apparatus for moving the center of gravity of a robot, and a system and method using the apparatus are provided. The apparatus includes a weight conveyor with a conveyed weight weighing a predetermined amount and disposed within the main body of the robot. The conveyed weight is conveyed in a predetermined direction to move the center of gravity of the robot, thus allowing a non-driven caster of the robot to surmount obstacles in its path and not become stuck while the robot is moving.

Abstract translation: 提供了一种用于移动机器人的重心的装置，以及使用该装置的系统和方法。 该装置包括具有称重预定量的输送重量并设置在机器人主体内的重量输送机。 传送的重量沿预定方向传送以移动机器人的重心，从而允许机器人的非驱动脚轮在其路径中超越障碍物，并且在机器人移动时不会卡住。

公开(公告)号：US07254769B2

公开(公告)日：2007-08-07

申请号：US10693545

申请日：2003-10-23

Applicant: Jung-Im Kim ,  Young-Jo Ko

Inventor： Jung-Im Kim ,  Young-Jo Ko

IPC: H03M13/00

CPC classification number: H04L1/1819 ,  H03M13/09 ,  H03M13/1105 ,  H03M13/2906 ,  H03M13/2957 ,  H03M13/6393 ,  H04L1/005 ,  H04L1/1867

Abstract: Disclosed is an encoding/decoding apparatus of a HARQ system using LDPC codes. A first LDPC code encoding apparatus encodes input information data and transmits the encoded data to the decoding apparatus. An interleaver interleaves the input information data. A second LDPC code encoder in parallel with the first LDPC code encoder performs LDPC code encoding on an output of the interleaver so as to transmit it to the decoding apparatus. The first LDPC code encoder transmits an output signal to the decoding apparatus at odd numbered retransmissions in response to a retransmission request from the decoding apparatus, and the second LDPC code encoder transmits an output signal to the decoding apparatus at even numbered retransmissions in response to the retransmission request from the decoding apparatus.

Abstract translation: 公开了使用LDPC码的HARQ系统的编码/解码装置。 第一LDPC码编码装置对输入信息数据进行编码，并将编码数据发送到解码装置。 交织器交织输入信息数据。 与第一LDPC码编码器并联的第二LDPC码编码器对交织器的输出执行LDPC码编码，以将其发送到解码装置。 第一LDPC码编码器响应于来自解码装置的重发请求，以奇数编号的重传方式向解码装置发送输出信号，并且第二LDPC码编码器响应于第二LDPC码编码器以偶数重传向解码装置发送输出信号 来自解码装置的重传请求。

公开(公告)号：US10965025B2

公开(公告)日：2021-03-30

申请号：US15901161

申请日：2018-02-21

Applicant: Electronics and Telecommunications Research Insitute

Inventor： Dong Kyoo Kim

IPC: H01Q3/26 ,  H04B17/21 ,  H04B17/14 ,  G01S13/02 ,  G01S7/40 ,  G01S13/88 ,  G01S13/931

Abstract: Disclosed is a self-calibration method and apparatus for an array antenna system. According to an embodiment of the present disclosure, a correction method of an array antenna system includes: deriving, at a first time, a correction factor Ri,j for a path connecting an i-th (i is an integer equal to or greater than one and equal to or less than m) transmission antenna and a j-th (j is an integer equal to or greater than one and equal to or less than n) reception antenna; deriving, at a second time, a calibration factor {circumflex over (Q)}i,j for the path connecting the i-th transmission antenna and the j-th reception antenna; and performing, based on the {circumflex over (Q)}i,j, calibration on the path connecting the i-th transmission antenna and the j-th reception antenna.

公开(公告)号：US10038635B2

公开(公告)日：2018-07-31

申请号：US15247479

申请日：2016-08-25

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jee Yon Choi ,  Jae Woo Park ,  Hyoung Jin Kwon ,  Sok Kyu Lee

IPC: H04W4/00 ,  H04L12/741 ,  H04B7/0452 ,  H04B7/06 ,  H04W72/04 ,  H04W88/08

CPC classification number: H04L45/74 ,  H04B7/0452 ,  H04B7/0617 ,  H04W72/0413 ,  H04W88/08

Abstract: Provided is a method of transmitting and receiving a frame for a multi-user multiple-input and multiple-output (MU-MIMO) communication in an access point (AP), the method including transmitting, to each of a plurality of stations (STAs), an uplink multi-user request (UL MU request) frame requesting transmission of a data frame, and receiving, from each of the plurality of STAs, the data frame during an identical period of time based on an identical reception intensity, wherein the UL MU request frame includes at least one of information on a transmission time of the data frame and information on a reception intensity of the data frame in the AP.

公开(公告)号：US09271225B2

公开(公告)日：2016-02-23

申请号：US14146690

申请日：2014-01-02

Applicant: Electronics and Telecommunications Research Institute

Inventor： Sae Hun Oh ,  Sok Kyu Lee

IPC: H04W48/16 ,  H04W84/12

CPC classification number: H04W48/16 ,  H04W84/12

Abstract: A method and apparatus for scanning a channel in a wireless local area network (WLAN) system may be disclosed including, extracting at least one target channel from among a plurality of channels present in at least one frequency band, based on channel scanning record information, generating a basic service set (BSS) existing information element (IE) including at least one BSS existing channel bitmap indicating information associated with a channel in which at least one access point (AP) exists, based on channel information received from at least one neighboring station (STA), determining a scanning rank of the at least one target channel, using the BSS existing channel IE, and identifying a target AP through scanning the at least one target channel, based on the scanning rank.

Abstract translation: 可以公开一种用于在无线局域网（WLAN）系统中扫描信道的方法和装置，其包括：基于信道扫描记录信息，从至少一个频带中存在的多个信道中提取至少一个目标信道， 基于从至少一个相邻的接收点（AP）接收的信道信息，生成包括指示与存在至少一个接入点（AP）的信道相关联的信息的至少一个BSS现有信道位图的基本服务集（BSS）现有信息元素（IE） （STA），使用BSS现有信道IE确定至少一个目标信道的扫描等级，并且基于扫描等级来通过扫描至少一个目标信道来识别目标AP。

公开(公告)号：US08042003B2

公开(公告)日：2011-10-18

申请号：US12155932

申请日：2008-06-11

Applicant: Yu Seung Ma ,  Duk Kyun Woo

Inventor： Yu Seung Ma ,  Duk Kyun Woo

IPC: G06F11/00

CPC classification number: G06F11/3676

Abstract: Provided are a method and apparatus for evaluating the effectiveness of a test case used for a program test on the basis of error detection capability. The method includes: receiving a target program used for evaluating the effectiveness of the test case; generating an error program by inputting errors to the target program; detecting the errors by executing the test case on the generated error program; and calculating evaluation points of the test case using a ratio of the number of the detected errors to the number of the input errors. Thus, the capability of the test case used for a program test to detect errors can be evaluated.

Abstract translation: 提供了一种用于基于错误检测能力来评估用于程序测试的测试用例的有效性的方法和装置。 该方法包括：接收用于评估测试用例有效性的目标程序; 通过向目标程序输入错误来产生错误程序; 通过对生成的错误程序执行测试用例来检测错误; 以及使用检测到的错误的数量与输入错误的数量的比率来计算测试用例的评估点。 因此，可以评估用于程序测试以检测错误的测试用例的能力。

公开(公告)号：US07724899B2

公开(公告)日：2010-05-25

申请号：US11634995

申请日：2006-12-07

Applicant: Kyeong Soo Han ,  Jee Sook Eun ,  Yool Kwon

Inventor： Kyeong Soo Han ,  Jee Sook Eun ,  Yool Kwon

IPC: G06F11/00 ,  H04L9/00 ,  G06F7/04

CPC classification number: H04L9/12 ,  H04L63/068 ,  H04L63/164

Abstract: A method for controlling a security channel for reducing system load by extending the use period of a security association key is provided. In this method, an upper bit initial value of an initialization vector of an encryption algorithm and a using range thereof are shared between a transmitting side and a receiving side when a security channel is created. Then, a secure association is created between a transmitting side and a receiving side by setting an association number, a next packet number which is a lower bit value of an initialization vector, and a secure association key. Afterward, a packet number is modified whenever a frame is transmitted until all of packet numbers are used. When all packet numbers are used, the upper bit value of the initialization vector changes.

Abstract translation: 提供了一种通过扩展安全关联密钥的使用周期来控制用于减少系统负载的安全信道的方法。 在该方法中，当创建安全信道时，在发送侧和接收侧之间共享加密算法的初始化向量的高位初始值及其使用范围。 然后，通过设置关联号码，作为初始化向量的较低位值的下一个分组号码和安全关联密钥，在发送侧和接收侧之间建立安全关联。 之后，每当发送帧直到使用所有分组号时，分组号被修改。 当使用所有分组号时，初始化向量的高位值变化。

公开(公告)号：US20150215117A1

公开(公告)日：2015-07-30

申请号：US14608878

申请日：2015-01-29

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Ju Han KIM ,  Seung Kwang LEE ,  Doo Ho CHOI

IPC: H04L9/08

CPC classification number: H04L9/0631 ,  G09C1/00 ,  H04L2209/16

Abstract: Disclosed are a white box encryption apparatus and method. The white box encryption method includes performing an encryption operation using a plurality of white box encryption tables for each of a plurality of rounds, and mixing arrangement of result tables output for each round.

Abstract translation: 公开了一种白盒加密装置和方法。 白盒加密方法包括对多个轮次中的每一个执行多个白盒加密表的加密操作，以及每轮输出的结果表的混合排列。

公开(公告)号：US06944635B2

公开(公告)日：2005-09-13

申请号：US10175098

申请日：2002-06-20

Applicant: Hong-Yeon Kim ,  Jongho Won ,  June Kim ,  Myung-Joon Kim

Inventor： Hong-Yeon Kim ,  Jongho Won ,  June Kim ,  Myung-Joon Kim

IPC: G06F17/40 ,  G06F11/14 ,  G06F17/00 ,  G06F11/00 ,  G06K5/04

CPC classification number: G06F11/1435 ,  G06F11/1471 ,  Y10S707/99931 ,  Y10S707/99953

Abstract: A method for file deletion and recovery against system failures in a database management system comprising steps of deleting files listed in a pending action list during a transaction commit process, writing a non-atomic file deletion as an atomic operation into a log and recovering uncompleted file deletion during restart recovery by using the log is disclosed. When system failures occur during file deletion in a database management system, resources of which releasing is interrupted by failures are released perfectly through recovery step, so it is advantageous in that coherency of data is maintained and efficiency of storage device arises.

Abstract translation: 一种用于在数据库管理系统中针对系统故障的文件删除和恢复的方法，包括以下步骤：在事务提交过程期间删除待处理动作列表中列出的文件，将非原子文件删除作为原子操作写入日志并恢复未完成的文件 公开了通过使用日志重启恢复期间的删除。 当在数据库管理系统中的文件删除期间发生系统故障时，通过恢复步骤完全释放其中释放被故障中断的资源，因此有利的是保持数据的一致性并产生存储设备的效率。