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    • 1. 发明授权
    • Node for self localization, clustering method using the same, and localization method
    • 节点用于自定位,聚类方法使用相同,并定位方法
    • US07697458B2
    • 2010-04-13
    • US11759450
    • 2007-06-07
    • Jongjun ParkJong Oh LeeSun Joong KimCheol Sig PyoJong Suk Chae
    • Jongjun ParkJong Oh LeeSun Joong KimCheol Sig PyoJong Suk Chae
    • H04L12/16
    • 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。
    • 2. 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。
    • 5. 发明申请
    • METHOD OF PREVENTING DATA COLLOSIONS IN BEACON-ENABLED ZIGBEE SYSTEM HAVING TREE ROUTING SCHEME
    • 在具有树路由方案的BEACON-EIBBLED ZIGBEE系统中防止数据聚合的方法
    • US20100110888A1
    • 2010-05-06
    • US12532826
    • 2007-10-24
    • Jongjun ParkJong-Oh LeeHoon JeongSun-Joong KimCheol-Sig PyoJong-Suk Chae
    • Jongjun ParkJong-Oh LeeHoon JeongSun-Joong KimCheol-Sig PyoJong-Suk Chae
    • H04L1/00
    • H04W74/0816H04W84/18
    • Provided is a method of preventing a data collision that occurs when two or more child nodes simultaneously transmit data to a parent node in a ZigBee network having a tree routing scheme and operating in a beacon mode. In the ZigBee system having the tree routing scheme and operating in the beacon mode, data communication to the parent node is performed in a beacon frame of the parent node. Here, when several child nodes exist under a single parent node, the child nodes transmit data to the parent node at the moment of receiving the beacon of the parent node, so that the data collision may occur when the child nodes simultaneously transmit the data to the parent node in the beacon frame of the parent node. In the method of preventing a data collision, each of the two or more child nodes is set to wait for its guard time (delay time) when transmitting data to the parent node to induce a normal slotted carrier sense multiple access with collision avoidance (CSMA-CA) operation. Therefore, the data collision can be prevented.
    • 提供了一种防止当两个或多个子节点同时向具有树路由方案并且以信标模式操作的ZigBee网络中的父节点发送数据时发生的数据冲突的方法。 在具有树路由方案并在信标模式下操作的ZigBee系统中,在父节点的信标帧中执行到父节点的数据通信。 这里,当在单个父节点下存在几个子节点时,子节点在接收到父节点的信标的时刻向父节点发送数据,使得当子节点同时发送数据时可能发生数据冲突 父节点的信标帧中的父节点。 在防止数据冲突的方法中,将两个或多个子节点中的每一个设置为在向父节点发送数据时等待其保护时间(延迟时间),以引起具有防冲突的正常时隙载波侦听多路访问(CSMA -CA)操作。 因此,可以防止数据冲突。