公开(公告)号：US08953518B2

公开(公告)日：2015-02-10

申请号：US13526934

申请日：2012-06-19

Applicant: Yong Su Lee ,  Dae Geun Park ,  Young Il Park ,  Won Ryu

Inventor： Yong Su Lee ,  Dae Geun Park ,  Young Il Park ,  Won Ryu

IPC: H04W56/00

CPC classification number: H04B7/15528 ,  H04W56/005 ,  H04W56/0085

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20100086091A1

公开(公告)日：2010-04-08

申请号：US12575375

申请日：2009-10-07

Applicant: Dae Geun Park ,  Jung Hee Lee ,  Seung Woo Lee ,  Bhum Cheol Lee

Inventor： Dae Geun Park ,  Jung Hee Lee ,  Seung Woo Lee ,  Bhum Cheol Lee

IPC: H04L7/00

CPC classification number: G04R20/18 ,  H04J3/0667 ,  H04L69/28

Abstract: Provided is a method and apparatus for synchronizing a time of day (TOD) in a convergent network, wherein the TOD is received from a time server connected in the convergent network and is provided to a terminal connected in a wired or wireless network, specifically a terminal connected in a heterogeneous network, that requires TOD information. The apparatus includes a time server that provides standard TOD information, a gateway or a host personal computer (PC) that provides the standard TOD information of the time server to the terminal in a 3rd layer or lower instead of an upper layer of the open system interconnection (OSI) 7 layer model, and the terminal that adjusts a local clock according to the provided standard TOD information. According to the method and apparatus, the terminal not only maintains a very precise TOD by obtaining TOD information of the time server periodically or when required, but also obtains the TOD information without using application software for processing the TOD information. Accordingly, power consumption of the terminal is decreased.

Abstract translation: 提供了一种用于在收敛网络中同步时间（TOD）的方法和装置，其中，从连接在会聚网络中的时间服务器接收TOD并将其提供给连接在有线或无线网络中的终端，具体地， 终端连接在异构网络中，需要TOD信息。 该装置包括提供标准TOD信息的时间服务器，网关或主机个人计算机（PC），其提供时间服务器的标准TOD信息到第三层或更低层的终端，而不是开放系统的上层 互连（OSI）7层模型，以及根据提供的标准TOD信息调整本地时钟的终端。 根据该方法和装置，终端不仅通过周期性地或者需要时间地获取时间服务器的TOD信息，而且在不使用用于处理TOD信息的应用软件的情况下获取TOD信息，来维持非常精确的TOD。 因此，终端的功耗降低。

公开(公告)号：US20070053353A1

公开(公告)日：2007-03-08

申请号：US11321191

申请日：2005-12-29

Applicant: Hyoung Il Lee ,  Dae Geun Park ,  Jeong Hee Lee ,  Bhum Cheol Lee

Inventor： Hyoung Il Lee ,  Dae Geun Park ,  Jeong Hee Lee ,  Bhum Cheol Lee

IPC: H04L12/56 ,  H04L12/66

CPC classification number: H04L12/4658 ,  H04L12/4654 ,  H04L45/302 ,  H04L45/502 ,  H04L47/10 ,  H04L47/2425 ,  H04L47/2441 ,  H04L47/31

Abstract: A method of classifying packets by a subscriber and processing classified packet to provide fairness to subscribers is provided. In order to classify the packets by the subscriber, a subscriber identification tag is inserted into a predetermined portion of an Ethernet frame and the packets are classified using the subscriber identification tag. The classified packets are processed based on the classifying result. Accordingly, an intermediate node not directly connected to the subscriber can classify the packets by the subscriber even in an uncontrollably expanded subscriber network. Therefore, the subscriber network is simply and effectively managed while providing the fairness to the subscriber in processing packets and allocating bandwidth.

Abstract translation: 提供了一种由用户分类分组并处理分类分组以向用户提供公平性的方法。 为了对用户对分组进行分类，将用户识别标签插入到以太网帧的预定部分中，并且使用用户识别标签对分组进行分类。 根据分类结果处理分类数据包。 因此，即使在不受控制地扩展的用户网络中，直接连接到用户的中间节点也可以由用户对分组进行分类。 因此，用户网络简单有效地被管理，同时在处理分组和分配带宽时向用户提供公平性。

公开(公告)号：US08397095B2

公开(公告)日：2013-03-12

申请号：US12575375

申请日：2009-10-07

Applicant: Dae Geun Park ,  Jung Hee Lee ,  Seung Woo Lee ,  Bhum Cheol Lee

Inventor： Dae Geun Park ,  Jung Hee Lee ,  Seung Woo Lee ,  Bhum Cheol Lee

IPC: G06F1/12 ,  G06F13/42

CPC classification number: G04R20/18 ,  H04J3/0667 ,  H04L69/28

Abstract: Provided is a method and apparatus for synchronizing a time of day (TOD) in a convergent network, wherein the TOD is received from a time server connected in the convergent network and is provided to a terminal connected in a wired or wireless network, specifically a terminal connected in a heterogeneous network, that requires TOD information. The apparatus includes a time server that provides standard TOD information, a gateway or a host personal computer (PC) that provides the standard TOD information of the time server to the terminal in a 3rd layer or lower instead of an upper layer of the open system interconnection (OSI) 7 layer model, and the terminal that adjusts a local clock according to the provided standard TOD information. According to the method and apparatus, the terminal not only maintains a very precise TOD by obtaining TOD information of the time server periodically or when required, but also obtains the TOD information without using application software for processing the TOD information. Accordingly, power consumption of the terminal is decreased.

Abstract translation: 提供了一种用于在收敛网络中同步时间（TOD）的方法和装置，其中，从连接在会聚网络中的时间服务器接收TOD并将其提供给连接在有线或无线网络中的终端，具体地， 终端连接在异构网络中，需要TOD信息。 该装置包括提供标准TOD信息的时间服务器，网关或主机个人计算机（PC），其提供时间服务器的标准TOD信息到第三层或更低层的终端，而不是开放系统的上层 互连（OSI）7层模型，以及根据提供的标准TOD信息调整本地时钟的终端。 根据该方法和装置，终端不仅通过周期性地或者需要时间地获取时间服务器的TOD信息，而且在不使用用于处理TOD信息的应用软件的情况下获取TOD信息，来维持非常精确的TOD。 因此，终端的功耗降低。

公开(公告)号：US11484937B2

公开(公告)日：2022-11-01

申请号：US17318451

申请日：2021-05-12

Applicant: Dae Geun Park

Inventor： Dae Geun Park

IPC: B22C9/06

Abstract: 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：US08355476B2

公开(公告)日：2013-01-15

申请号：US12423090

申请日：2009-04-14

Applicant: Seung Woo Lee ,  Dae Geun Park ,  Bhum Cheol Lee

Inventor： Seung Woo Lee ,  Dae Geun Park ,  Bhum Cheol Lee

IPC: H04L7/00

CPC classification number: H04J3/0667 ,  H04J3/0697

Abstract: 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.

Abstract translation: 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：US20080117813A1

公开(公告)日：2008-05-22

申请号：US11937805

申请日：2007-11-09

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

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

IPC: H04L12/56

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

Abstract: 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.

Abstract translation: 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。