公开(公告)号：US11484937B2

公开(公告)日：2022-11-01

申请号：US17318451

申请日：2021-05-12

申请人： Dae Geun Park

发明人： Dae Geun Park

IPC分类号： B22C9/06

摘要： A ventilator for a casting mold is mounted on an exhaust pipe (11) of a mold (10) to emit gas generated when melt is injected into a molding space (12). The ventilator for a casting mold has exhaust holes which are improved in arrangement structure and are shorter than a cylindrical body part so as to enhance gas emission efficiency and prevent transformation of the exhaust holes, and has a buffering space part formed inside a cylindrical body part to spread and accept melt coming through the exhaust holes so as to effectively prevent a damage of a mold caused by external leakage of the melt. The ventilator for the casting mold includes a cylindrical body part (100) and a fixed type exhaust block (20).

公开(公告)号：US08953512B2

公开(公告)日：2015-02-10

申请号：US13604826

申请日：2012-09-06

申请人： Sun-Sim Chun ,  Young-Il Kim ,  Han-Nah Kim ,  Dae-Geun Park ,  Won Ryu

发明人： Sun-Sim Chun ,  Young-Il Kim ,  Han-Nah Kim ,  Dae-Geun Park ,  Won Ryu

IPC分类号： H04H20/71 ,  H04L12/28 ,  H04L12/56

CPC分类号： H04W4/06 ,  H04W4/18

摘要： Provided are an apparatus and method for transmitting multi-carriers to provide a high-quality service to multicast-based service subscriber terminals. The method includes: mapping first data for providing the multicast service, and second data different from the first data, to different antennas; converting the first mapped data into a first Intermediate Frequency (IF) signal and the second mapped data into a second IF signal; converting the first IF signal into a first RF signal having a carrier frequency, and deciding a power intensity of the first RF signal so that the first RF signal is transmitted over the entire coverage region of the base station; and converting the second IF signal into a second RF signal having the other carrier frequency, and deciding a power intensity of the second RF signal so that the second RF signal is transmitted over a predetermined region around the base station.

摘要翻译： 提供了一种用于发送多载波以向基于多播的服务用户终端提供高质量服务的装置和方法。 该方法包括：将用于提供多播服务的第一数据和与第一数据不同的第二数据映射到不同的天线; 将第一映射数据转换成第一中频（IF）信号，将第二映射数据转换成第二IF信号; 将所述第一IF信号转换为具有载波频率的第一RF信号，并且确定所述第一RF信号的功率强度，使得所述第一RF信号在所述基站的整个覆盖区域上传输; 以及将所述第二IF信号转换为具有所述另一载波频率的第二RF信号，并且确定所述第二RF信号的功率强度，使得所述第二RF信号在所述基站周围的预定区域上传输。

公开(公告)号：US20140133383A1

公开(公告)日：2014-05-15

申请号：US14130458

申请日：2012-06-20

申请人： Dae-Geun Park

发明人： Dae-Geun Park

IPC分类号： H04W72/00 ,  H04W4/08

CPC分类号： H04W72/005 ,  H04L12/1845 ,  H04L12/185 ,  H04L12/189 ,  H04W4/08

摘要： The present invention relates to a system and a method for a mobile broadcast service, a controller, and a method for driving the controller. The system for a mobile broadcast service forms an MBS zone only with base stations having user demand for an MBS. For example, when there is a request for an MBS from a base station, if an MBS zone already exists which is providing the requested MBS, then the corresponding base station is included in the previously generated MBS zone. In contrast, if there are no more users using an MBS via a base station that is part of an MBS zone, then the base station in question is excluded from the MBS zone. Thus, an MBS zone can be dynamically formed by including or excluding a base station, forming an MBS zone, on the basis of an existence of an MBS user.

摘要翻译： 本发明涉及一种用于移动广播服务的系统和方法，控制器和用于驱动控制器的方法。 用于移动广播服务的系统仅对具有MBS用户需求的基站形成MB​​S区域。 例如，当存在来自基站的MBS的请求时，如果已经存在正在提供所请求的MBS的MBS区域，则相应的基站被包括在先前产生的MBS区域中。 相反，如果没有更多的用户通过作为MBS区域的一部分的基站使用MBS，则将所述基站从MBS区域中排除。 因此，可以基于MBS用户的存在，通过包括或排除形成MBS区域的基站来动态地形成MBS区域。

公开(公告)号：US20140123197A1

公开(公告)日：2014-05-01

申请号：US14128191

申请日：2012-05-09

申请人： Dae-Geun Park ,  Young-Il Kim ,  Yang-Jung Kim ,  Il-Young Chong

发明人： Dae-Geun Park ,  Young-Il Kim ,  Yang-Jung Kim ,  Il-Young Chong

IPC分类号： H04N21/438

CPC分类号： H04N21/438 ,  H04N21/25825 ,  H04N21/25841 ,  H04N21/25866 ,  H04N21/6125 ,  H04N21/64322 ,  H04N21/654 ,  H04N21/6587

摘要： The present invention relates to an IPTV service device and method for providing continuous service. The method according to one embodiment of the present invention comprises: a service-request receiving step of receiving an IPTV service request from a user of an IPTV terminal; a service-confirming step of confirming whether or not the IPTV service has previously been stopped in response to the IPTV service request; and an IPTV-service providing step of providing the IPTV service to the IPTV terminal from the point at which service was stopped if the IPTV service has previously been stopped.

摘要翻译： 本发明涉及一种用于提供连续服务的IPTV服务设备和方法。 根据本发明的一个实施例的方法包括：业务请求接收步骤，从IPTV终端的用户接收IPTV业务请求; 服务确认步骤，用于响应于IPTV服务请求确认IPTV服务是否先前已停止; 以及IPTV服务提供步骤，如果IPTV服务已经停止，则从服务停止的时刻向IPTV终端提供IPTV服务。

公开(公告)号：US08355476B2

公开(公告)日：2013-01-15

申请号：US12423090

申请日：2009-04-14

申请人： Seung Woo Lee ,  Dae Geun Park ,  Bhum Cheol Lee

发明人： Seung Woo Lee ,  Dae Geun Park ,  Bhum Cheol Lee

IPC分类号： H04L7/00

CPC分类号： H04J3/0667 ,  H04J3/0697

摘要： A timestamping apparatus for network synchronization includes a recovery unit and a timestamping unit. The recovery unit extracts a recovery clock operating at an operation frequency of a transmission terminal from a sync signal received from the transmission terminal. The timestamping unit measures a timestamp value of an arrival time of the sync signal by measuring a phase difference between the recovery clock and a local clock of a receiving terminal.

摘要翻译： 用于网络同步的时间戳装置包括恢复单元和时间戳单元。 恢复单元从从发送终端接收到的同步信号中提取在发送终端的操作频率下工作的恢复时钟。 时间戳单元通过测量恢复时钟和接收终端的本地时钟之间的相位差来测量同步信号的到达时间的时间戳值。

公开(公告)号：US20120114055A1

公开(公告)日：2012-05-10

申请号：US13291689

申请日：2011-11-08

申请人： Yong-Su LEE ,  Young-Il Kim ,  Cheol-Hye Cho ,  Sung-Hee Kim ,  Young-Soo Park ,  Dae-Geun Park ,  Sun-Sim Chun ,  Yeon-Joon Chung ,  Won Ryu

发明人： Yong-Su LEE ,  Young-Il Kim ,  Cheol-Hye Cho ,  Sung-Hee Kim ,  Young-Soo Park ,  Dae-Geun Park ,  Sun-Sim Chun ,  Yeon-Joon Chung ,  Won Ryu

IPC分类号： H04L5/12

CPC分类号： H04L27/265 ,  H04L27/0008 ,  H04L27/0012 ,  H04L27/22 ,  H04L27/38

摘要： A technology is provided capable of improving the efficiency of an OFDM system by obtaining the performance in Bit Error Rate (BER) in a wireless communication using OFDM and determining the minimum FFT input bit that produces a SNR difference of 0.1 dB or below with respect to a theoretical BER graph at a desired performance.

摘要翻译： 提供了能够通过使用OFDM获得无线通信中的比特误码率（BER）的性能并且确定相对于以下的方式产生0.1dB或更低的SNR差的最小FFT输入比特来提高OFDM系统的效率的技术 理想的BER图形，以期望的性能。

公开(公告)号：US08050280B2

公开(公告)日：2011-11-01

申请号：US11292983

申请日：2005-12-01

申请人： Ick-Sung Choi ,  Jeong-Hee Lee ,  Dae-Geun Park ,  Hyoung-Il Lee ,  Jong-Moo Sohn ,  Seung-Woo Lee ,  Bhum-Cheol Lee

发明人： Ick-Sung Choi ,  Jeong-Hee Lee ,  Dae-Geun Park ,  Hyoung-Il Lee ,  Jong-Moo Sohn ,  Seung-Woo Lee ,  Bhum-Cheol Lee

IPC分类号： H04L12/56

CPC分类号： H04L49/3036 ,  H04L49/25 ,  H04L49/3072

摘要： An efficient switching device and a method for fabricating the same using multiple shared memories are provided. The switching device includes: an output time determination unit to determine an output time to an output port; an output time administration unit to administer a possible data output time for each output port; a memory bank selection unit to select a memory bank with an empty data output time position; a memory bank utilization information administration unit to administer utilization information per output time; a connection unit to deliver transmission data to an output time position; a shared memory unit to store the data in the output time position, to administer dispersed shared memory banks according to an output time, and to read and output transmission data; and an output port connection unit receiving output data to read and transmit output port information of the data to a corresponding output port.

摘要翻译： 提供了一种有效的开关器件及其使用多个共享存储器的制造方法。 开关装置包括：输出时间确定单元，用于确定到输出端口的输出时间; 输出时间管理单元，用于管理每个输出端口的可能的数据输出时间; 存储器选择单元，用于选择具有空数据输出时间位置的存储体; 存储库利用信息管理单元，用于管理每个输出时间的利用信息; 连接单元，用于将传输数据传送到输出时间位置; 共享存储器单元，用于将数据存储在输出时间位置，以根据输出时间来管理分散的共享存储体，并读取和输出传输数据; 以及输出端口连接单元，其接收输出数据以将数据的输出端口信息读取并发送到相应的输出端口。

公开(公告)号：US20080117813A1

公开(公告)日：2008-05-22

申请号：US11937805

申请日：2007-11-09

申请人： Hyun Yong HWANG ,  Dae Geun Park ,  Bhum Cheol Lee ,  Jeong Hee Lee ,  Seung Woo Lee

发明人： Hyun Yong HWANG ,  Dae Geun Park ,  Bhum Cheol Lee ,  Jeong Hee Lee ,  Seung Woo Lee

IPC分类号： H04L12/56

CPC分类号： H04L47/762 ,  H04L47/10 ,  H04L47/11 ,  H04L47/12 ,  H04L47/25 ,  H04L47/263 ,  H04L47/70 ,  H04L47/745 ,  H04L49/254 ,  Y02D50/10

摘要： Provided is a dynamic rate-limiting method and apparatus used in a switch for switching packets from input ports to output ports, the method including: (a) adding traffic bandwidth values set in advance in active subscribers that are using the switch from among subscribers connected to the switch; (b) comparing the added value with a range between a maximum bandwidth and a minimum bandwidth that are set in the switch; and (c) according to a result of comparing, when the added values is smaller than the minimum bandwidth or larger than the maximum bandwidth set in the switch, increasing or decreasing the traffic bandwidths of the active subscribers set in advance so that the added value is within the range between the maximum bandwidth and minimum bandwidth. Accordingly, it is possible to automatically control the traffic bandwidths of subscribers that are currently using the switch.

摘要翻译： 提供了一种用于从输入端口切换到输出端口的交换机中的动态限速方法和装置，所述方法包括：（a）在从连接的用户中使用交换机的有效用户中预先设置业务带宽值 切换; （b）将所述附加值与在所述交换机中设置的最大带宽和最小带宽之间的范围进行比较; 和（c）根据比较的结果，当附加值小于最小带宽或大于交换机中设置的最大带宽时，增加或减少预先设定的活动用户的业务带宽，使得附加值 在最大带宽和最小带宽之间的范围内。 因此，可以自动控制正在使用交换机的用户的业务带宽。

公开(公告)号：US09432203B2

公开(公告)日：2016-08-30

申请号：US13548336

申请日：2012-07-13

申请人： Dae-Geun Park

发明人： Dae-Geun Park

IPC分类号： H04H20/71 ,  H04W88/00 ,  H04L12/18 ,  H04W72/00

CPC分类号： H04L12/185 ,  H04L12/1877 ,  H04L12/189 ,  H04W72/005

摘要： Provided are a method and apparatus for configuring a Multicast and Broadcast Service (MBS) zone dynamically in a mobile communication environment. According to an example, there is provided a method of seamlessly changing base stations configuring a MBS zone whenever one or more mobile terminals configuring the MBS zone move or whenever a predetermined time period has elapsed to thereby provide a MBS with excellent quality while saving radio resources.

摘要翻译： 提供了一种用于在移动通信环境中动态地配置多播和广播服务（MBS）区域的方法和装置。 根据一个示例，提供了一旦构成MBS区域的一个或多个移动终端移动时，或者每当经过预定时间段，从而提供具有优良品质的MBS同时节省无线电资源的情况下，无缝地改变配置MBS区域的基站的方法 。

公开(公告)号：US20130155939A1

公开(公告)日：2013-06-20

申请号：US13526934

申请日：2012-06-19

申请人： Yong Su LEE ,  Dae Geun PARK ,  Young Il KIM ,  Won RYU

发明人： Yong Su LEE ,  Dae Geun PARK ,  Young Il KIM ,  Won RYU

IPC分类号： H04W56/00

CPC分类号： H04B7/15528 ,  H04W56/005 ,  H04W56/0085

摘要： A method and an apparatus for acquiring initial synchronization in a wireless communication system are provided. A relay station determines whether or not the initial synchronization is acquired, determines a start position of a frame using a peak of an autocorrelation signal detected based on a preamble and a relay-amble (R-amble) received from a base station in the case in which the initial synchronization is not acquired, and determines the start position of the frame using a peak of an autocorrelation signal detected based on the relay-amble received from the base station in the case in which the initial synchronization is acquired.

摘要翻译： 提供了一种在无线通信系统中获取初始同步的方法和装置。 中继站确定是否获取初始同步，使用在基站中从基站接收的基于前导码的检测到的自相关信号的峰值和从基站接收的中继码（R-amble）来确定帧的开始位置 其中没有获取初始同步，并且在获取初始同步的情况下，使用从基站接收的基于从基站接收到的中继输入来检测的自相关信号的峰值来确定帧的开始位置。