公开(公告)号：US20070076741A1

公开(公告)日：2007-04-05

申请号：US11446500

申请日：2006-06-05

Applicant: Kyu-Ho Lee ,  Hee-Yong Youn

Inventor： Kyu-Ho Lee ,  Hee-Yong Youn

IPC: H04L12/413

CPC classification number: H04W74/0808 ,  H04L47/10 ,  H04L47/14

Abstract: An apparatus and method are provided for transmitting data in a station of a wireless local area network (LAN) system. In the apparatus, a data queue stores transmission data, and a data processor processes data output from the data queue. A radio frequency (RF) module up-converts a signal output from the data processor to a frequency band of the wireless LAN system, and transmits the up-converted signal as an RF signal. A scheduler performs scheduling such that a specific stepping index decreases each time a backoff time reaches ‘0’ so as to determine whether to transmit the data, and the data is transmitted when both the stepping index and the backoff time reach ‘0’. A backoff stepping generator determines an initial value of the stepping index within a predetermined range.

Abstract translation: 提供了一种用于在无线局域网（LAN）系统的站中发送数据的装置和方法。 在该装置中，数据队列存储发送数据，数据处理器处理从数据队列输出的数据。 射频（RF）模块将从数据处理器输出的信号上变频到无线LAN系统的频带，并将上变频信号作为RF信号发送。 调度器执行调度，使得每次退避时间达到0时，特定的步进索引减小，以便确定是否发送数据，并且当步进索引和退避时间都达到0时，数据被传送。 退避步进发生器将步进索引的初始值确定在预定范围内。

公开(公告)号：US09088911B2

公开(公告)日：2015-07-21

申请号：US13078794

申请日：2011-04-01

Applicant: Hyun-Chul Lee ,  Jin-Woo Jeon ,  Young-Seop Han ,  Young-Jip Kim ,  Hee-Yong Youn ,  Kyung-Tae Kim

Inventor： Hyun-Chul Lee ,  Jin-Woo Jeon ,  Young-Seop Han ,  Young-Jip Kim ,  Hee-Yong Youn ,  Kyung-Tae Kim

IPC: H04W36/30 ,  H04W24/10 ,  H04W36/00 ,  H04W84/12

CPC classification number: H04W24/10 ,  H04W36/0083 ,  H04W36/30 ,  H04W84/12

Abstract: A method and apparatus perform channel scanning in a wireless communication system. A signal intensity of an Access Point (AP) is compared with a scanning threshold, when the AP signal intensity not less than the scanning threshold, a channel scanning schedule list is generated in consideration of a scan time based on a passive channel scan scheme and a scan time based on an active channel scan scheme. The channel scanning is performed every channel scanning time, according to the channel scanning schedule list.

Abstract translation: 方法和装置在无线通信系统中执行信道扫描。 当接收点（AP）的信号强度与扫描阈值进行比较时，当AP信号强度不小于扫描阈值时，考虑到基于被动信道扫描方案的扫描时间来生成信道扫描调度表，并且 基于活动通道扫描方案的扫描时间。 根据频道扫描时间表，每个频道扫描时间执行频道扫描。

公开(公告)号：US08243689B2

公开(公告)日：2012-08-14

申请号：US12712340

申请日：2010-02-25

Applicant: Hee Yong Youn ,  Kyung Tae Kim ,  Byung Jun Lee

Inventor： Hee Yong Youn ,  Kyung Tae Kim ,  Byung Jun Lee

IPC: H04W4/00

CPC classification number: H04W36/30 ,  H04W36/32

Abstract: Disclosed herein is a handover method and apparatus for providing mobile Internet Protocol Television (IPTV) service over wireless communication networks. The handover method includes checking whether the strength of a signal received from a first base station of a serving first wireless network falls within a predetermined first threshold range; if the strength of the signal falls within the range, checking whether the strength of a signal received from at least one base station of a second wireless network is higher than a second threshold value required for handover; estimating the velocity and direction of a Mobile Node (MN) using location information received from a satellite; predicting a handover target base station using the estimated velocity and estimated location information; and, if the predicted target base station is one of base stations having the second threshold value, performing handover to the target base station.

Abstract translation: 本文公开了一种用于通过无线通信网络提供移动因特网协议电视（IPTV）服务的切换方法和装置。 切换方法包括：检查从服务第一无线网络的第一基站接收的信号的强度是否落在预定的第一阈值范围内; 如果信号的强度落在该范围内，则检查从第二无线网络的至少一个基站接收到的信号的强度是否高于切换所需的第二阈值; 使用从卫星接收的位置信息来估计移动节点（MN）的速度和方向; 使用估计速度和估计位置信息来预测切换目标基站; 并且如果预测的目标基站是具有第二阈值的基站之一，则执行到目标基站的切换。

公开(公告)号：US20110258670A1

公开(公告)日：2011-10-20

申请号：US13089139

申请日：2011-04-18

Applicant: Kyung-Wook Baek ,  Jin-Woo Jeon ,  Young-Seop Han ,  Young-Jip Kim ,  Hee-Yong Youn ,  Kyung-Tae Kim

Inventor： Kyung-Wook Baek ,  Jin-Woo Jeon ,  Young-Seop Han ,  Young-Jip Kim ,  Hee-Yong Youn ,  Kyung-Tae Kim

IPC: H04N7/173

CPC classification number: H04N21/6125 ,  H04N7/17336 ,  H04N21/26275 ,  H04N21/47208 ,  H04N21/6405 ,  H04N21/6408 ,  H04N21/64707

Abstract: An apparatus and method provide effective video transmission in a communication system that supports an Internet Protocol Television (IPTV) service between heterogeneous networks. A request for a contiguous service is received from a terminal during a mid-point of a video stream. A delay time that may be generated when the video contents are transmitted is estimated for each of a patching type and a fast broadcasting type. A transmission type with a shorter delay time for the video contents is determined based on the estimated delay time for each of the patching type and the fast broadcasting type. And the video contents are transmitted to the terminal by applying the determined transmission type.

Abstract translation: 一种装置和方法在支持异构网络之间的因特网协议电视（IPTV）业务的通信系统中提供有效的视频传输。 在视频流的中点期间从终端接收对连续服务的请求。 针对补丁类型和快速广播类型中的每一种估计可以在发送视频内容时产生的延迟时间。 基于针对补丁类型和快速广播类型的估计延迟时间，确定视频内容的延迟时间较短的传输类型。 并且通过应用确定的传输类型将视频内容发送到终端。

公开(公告)号：US07929479B2

公开(公告)日：2011-04-19

申请号：US12365142

申请日：2009-02-03

Applicant: Hee Yong Youn ,  Chi Hyun Cho

Inventor： Hee Yong Youn ,  Chi Hyun Cho

IPC: H04B7/14

CPC classification number: H04H20/72 ,  H04H20/42 ,  H04H60/80 ,  H04L43/0888

Abstract: A method and system for Multicast Broadcast Service (MBS) over Mobile Multi-hop Relay (MMR) network using dynamic modification of Modulation and Coding Scheme (MCS) level are provided. The method comprises deciding MCS level for transmission between base station (BS) and relay station (RS), deciding MCS level for transmission between the BS and RS, and transmitting an MCS control message to the RS informing of the MCS level for transmission between the RS and the MS comprises calculating spectrum efficiency of the MS (ME), and selecting MCS level corresponding to the ME as optimum MCS level for the transmission between the RS and the MS.

Abstract translation: 提供了一种使用动态修改调制和编码方案（MCS）级别的移动多跳中继（MMR）网络组播广播服务（MBS）的方法和系统。 该方法包括：确定基站（BS）和中继站（RS）之间传输的MCS级别，确定BS与RS之间的传输的MCS级别;以及向RS发送MCS控制消息，通知MCS级别以进行传输 RS，MS包括计算MS（ME）的频谱效率，并且选择与ME对应的MCS级别作为RS和MS之间的传输的最佳MCS级别。

公开(公告)号：US07873167B2

公开(公告)日：2011-01-18

申请号：US11566411

申请日：2006-12-04

Applicant: Hee-yong Youn ,  Sung-jin Choi

Inventor： Hee-yong Youn ,  Sung-jin Choi

IPC: H04L9/00

CPC classification number: H04L9/083 ,  H04L9/14 ,  H04L63/062 ,  H04L67/12 ,  H04L2209/805

Abstract: A system for effectively pre-distributing keys for a distributed sensor network is disclosed, The system includes: a plurality of sensor nodes, each of which has a sensing function, a calculation function, and a wireless communication function; and a base station which is connected to the sensor nodes over a wireless network, receives data from the sensor nodes, acts as a data central station, and distributes keys for inter-sensornode security authentication to the sensor nodes. A key management unit contained in the base station, generates a set of the sensor nodes used for security authentication between the sensor nodes, decomposes the set of the sensor nodes into a plurality of matrices, distributes the matrices to the sensor nodes, and allows the sensor nodes to search for a common private key required for the security authentication using the received matrices. Therefore, the system can always search for a common private key between the sensor nodes.

Abstract translation: 公开了一种用于分布式传感器网络的有效预分配密钥的系统。该系统包括：多个传感器节点，每个传感器节点具有感测功能，计算功能和无线通信功能; 以及通过无线网络连接到传感器节点的基站，从传感器节点接收数据，充当数据中心站，并将传感器节点安全认证的密钥分发给传感器节点。 包含在基站中的密钥管理单元生成用于传感器节点之间的安全认证的一组传感器节点，将传感器节点的集合分解为多个矩阵，将矩阵分布到传感器节点，并允许 传感器节点搜索使用接收矩阵进行安全认证所需的公共私钥。 因此，系统可以始终在传感器节点之间搜索公共私钥。

公开(公告)号：US20100061557A1

公开(公告)日：2010-03-11

申请号：US11566411

申请日：2006-12-04

Applicant: Hee-yong YOUN ,  Sung-jin CHOI

Inventor： Hee-yong YOUN ,  Sung-jin CHOI

IPC: H04L9/08

CPC classification number: H04L9/083 ,  H04L9/14 ,  H04L63/062 ,  H04L67/12 ,  H04L2209/805

Abstract: A system for effectively pre-distributing keys for a distributed sensor network is disclosed, The system includes: a plurality of sensor nodes, each of which has a sensing function, a calculation function, and a wireless communication function; and a base station which is connected to the sensor nodes over a wireless network, receives data from the sensor nodes, acts as a data central station, and distributes keys for inter-sensornode security authentication to the sensor nodes. A key management unit contained in the base station, generates a set of the sensor nodes used for security authentication between the sensor nodes, decomposes the set of the sensor nodes into a plurality of matrices, distributes the matrices to the sensor nodes, and allows the sensor nodes to search for a common private key required for the security authentication using the received matrices. Therefore, the system can always search for a common private key between the sensor nodes.

Abstract translation: 公开了一种用于分布式传感器网络的有效预分配密钥的系统。该系统包括：多个传感器节点，每个传感器节点具有感测功能，计算功能和无线通信功能; 以及通过无线网络连接到传感器节点的基站，从传感器节点接收数据，充当数据中心站，并将传感器节点安全认证的密钥分发给传感器节点。 包含在基站中的密钥管理单元生成用于传感器节点之间的安全认证的一组传感器节点，将传感器节点组分解为多个矩阵，将矩阵分布到传感器节点，并允许 传感器节点搜索使用接收矩阵进行安全认证所需的公共私钥。 因此，系统可以始终在传感器节点之间搜索公共私钥。