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    • 6. 发明申请
    • MULTIPLE ACCESS SYSTEM AND METHOD FOR 60 GHZ WIRELESS COMMUNICATIONS SYSTEM
    • 60 GHZ无线通信系统的多路访问系统及方法
    • US20090238296A1
    • 2009-09-24
    • US12479424
    • 2009-06-05
    • Kyeongpyo KIMJin Kyeong KIMWoo Yong LEEYong Sun KIMNae-Soo KIMCheol Sig PYO
    • Kyeongpyo KIMJin Kyeong KIMWoo Yong LEEYong Sun KIMNae-Soo KIMCheol Sig PYO
    • H04K1/10H04L27/06
    • H04W72/1252H04W74/08H04W84/12
    • A control apparatus for use in wireless communications includes an antenna unit having antennas, the number of the antennas being equal to a maximum allowable number of connections in a specific frequency band; and a controller for receiving a connection request signal from each terminal attempting to connect to the control apparatus via the antenna unit, and transmitting and receiving a data signal to and from each terminal connected to the control apparatus by using a multiple-input-multiple-output scheme. The controller transmit and receive the data signal to and from each terminal connected to the control apparatus by obtaining a signal value of each antenna based on a predicted channel matrix and the number and types of terminals connected to the control apparatus via the antenna and separating the data signal for each terminal from the signal value according to the multiple-input-multiple-output scheme.
    • 用于无线通信的控制装置包括具有天线的天线单元,天线的数量等于特定频带中的最大允许连接数; 以及控制器,用于从每个终端接收尝试经由天线单元连接到控制装置的连接请求信号,并且通过使用多输入多重连接方式向连接到控制装置的每个终端发送数据信号和从每个终端接收数据信号, 输出方案。 控制器通过基于预测的信道矩阵以及通过天线连接到控制装置的终端的数量和类型获得每个天线的信号值来向连接到控制装置的每个终端发送数据信号并从每个终端接收数据信号, 根据多输入多输出方案从信号值得到每个终端的数据信号。
    • 7. 发明申请
    • METHOD AND APPARATUS FOR AVOIDING COLLISION BETWEEN EACH OF RADIO FREQUENCY IDENTIFICATION READERS
    • 用于避免无线电频率识别读者之间的冲突的方法和装置
    • US20090058612A1
    • 2009-03-05
    • US12039476
    • 2008-02-28
    • Byunghyun CHUNGHee Sook MONae-Soo KIMCheol Sig PYO
    • Byunghyun CHUNGHee Sook MONae-Soo KIMCheol Sig PYO
    • H04Q5/22H04Q5/00
    • G06K7/0008G06K7/10069G06K7/10356H04Q2213/13095
    • Provided are a method and an apparatus for avoiding a collision between each of radio frequency identification (RFID) readers. The method and the apparatus divide the RFID readers into first RFID readers and second RFID readers according to a maximum output level, and set first frequency channels for the first RFID readers and second frequency channels for the second RFID readers, set frequency channel disposition information for each of the first RFID readers, generate a channel holding signal in each of the first frequency channels, and if a frequency channel usage request or a frequency channel return request is received from one of the first RFID readers, stop generating or generate the channel holding signal in a frequency channel related to the frequency channel usage or return request. In this manner, the collision between each of the RFID readers is avoided by preventing the second RFID readers from using the first frequency channels for the first RFID readers. Also, the method and the apparatus can efficiently manage frequency channels by controlling a ratio of the number of the first frequency channels to be used by the first RFID readers and the number of the second frequency channels to be used by the second RFID readers, according to usage frequency.
    • 提供了一种用于避免每个射频识别(RFID)读取器之间的冲突的方法和装置。 该方法和设备根据最大输出电平将RFID阅读器划分为第一RFID阅读器和第二RFID阅读器,并为第一RFID读取器和第二个RFID读取器的第二个频道设置第一个频道,设置频道信息处理信息 每个第一RFID读取器在每个第一频道中产生频道保持信号,并且如果从第一RFID读取器之一接收到频道使用请求或频道返回请求,则停止产生或生成频道保持 在与频道使用或返回请求相关的频道中的信号。 以这种方式,通过防止第二RFID读取器对第一RFID读取器使用第一频率信道来避免每个RFID读取器之间的冲突。 此外,该方法和装置可以通过控制由第一RFID读取器使用的第一频道的数量与第二RFID读取器使用的第二频道的数量的比率来有效地管理频道,根据 到使用频率。
    • 8. 发明申请
    • NODE FOR SELF LOCALIZATION, CLUSTERING METHOD USING THE SAME, AND LOCALIZATION METHOD
    • 用于自定位的节点,使用它的聚类方法和本地化方法
    • US20080069008A1
    • 2008-03-20
    • US11759450
    • 2007-06-07
    • Jongjun PARKJong Oh LEESun Joong KIMCheol Sig PYOJong Suk CHAE
    • Jongjun PARKJong Oh LEESun Joong KIMCheol Sig PYOJong Suk CHAE
    • H04L12/28
    • H04W64/00H04W4/08H04W48/16H04W84/18
    • A node for self localization, a clustering method using the same, and a localization method are provided. The node, which is located in a specific space so as to constitute a sensor network, includes a location information messaging unit which receives one or more location information messages including information on spatial locations of one or more neighboring nodes in the sensor network from the neighboring nodes in the sensor network; a distance calculator which calculates a first distance to the neighboring node on the basis of the location information included in the received location information messages and calculates a second distance to one or more neighboring nodes on the basis of the received time or intensity of the message on the location information; and a clustering unit which forms clusters of the node and a plurality of neighboring nodes in which the difference between the first and second distances is less than a predetermined threshold.
    • 提供了一种用于自定位的节点,使用该节点的聚类方法和定位方法。 位于特定空间中以构成传感器网络的节点包括位置信息消息单元,其接收一个或多个位置信息消息,其包括关于传感器网络中的一个或多个相邻节点的空间位置的信息 传感器网络中的节点; 距离计算器,其基于包括在接收的位置信息消息中的位置信息计算到相邻节点的第一距离,并基于所接收的消息的时间或强度计算到一个或多个相邻节点的第二距离 位置信息; 以及聚集单元,其形成所述节点的簇和多个相邻节点,其中所述第一和第二距离之间的差小于预定阈值。
    • 9. 发明申请
    • SENSOR NETWORK SYSTEM AND COMMUNICATION METHOD THEREOF
    • 传感器网络系统及其通信方法
    • US20110051645A1
    • 2011-03-03
    • US12874856
    • 2010-09-02
    • Seung Ki HONGJong Arm JUNCheol Sig PYOSang Hun LEELynn CHOI
    • Seung Ki HONGJong Arm JUNCheol Sig PYOSang Hun LEELynn CHOI
    • G08C17/00
    • H04W40/005H04L45/48H04W76/28H04W84/18Y02D70/00
    • Provided are a communication method and system for sensor network. In reporting event occurrence in a real-time sensor network application, a cycle time is divided into an event announcement period and a data transmission period to provide real-time transmission performance and energy efficiency. Each of the periods is again divided into the number of slots equal to the maximum depth of a network. Respective nodes sequentially operate according to their depths in a routing tree during the event announcement period to receive the signal transmitted from the lower node. To remove sleep delay, a slot next to the signal reception slot becomes a signal transmission slot. A node sensed an event transmits a signal informing event occurrence during its signal transmission slot, and this signal includes only the address of the transmission node. When a signal does not exist in the event announcement period, no traffic occurs in the data transmission period and the upper nodes maintain a sleep state. When a signal is transmitted during the event announcement period, nodes transmitting/receiving a corresponding signal operate during the data transmission period to transfer data packets.
    • 提供了一种用于传感器网络的通信方法和系统。 在报告实时传感器网络应用中的事件发生时,将周期时间分为事件通知周期和数据传输周期,以提供实时传输性能和能量效率。 每个周期再次被划分为等于网络的最大深度的时隙数。 各个节点在事件发布周期期间根据路由树中的深度顺序地操作以接收从下层节点发送的信号。 为了消除睡眠延迟,信号接收时隙旁边的时隙成为信号传输时隙。 感测事件的节点在其信号传输时隙期间发送通知事件发生的信号,并且该信号仅包括传输节点的地址。 当事件通知期间不存在信号时,在数据发送期间不发生业务,上层节点保持睡眠状态。 当在事件发布期间发送信号时,发送/接收相应信号的节点在数据传输周期期间运行以传送数据分组。