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    • 54. 发明授权
    • System and method for position awareness for minimizing power consumption in sensor network environment
    • 用于定位感知的系统和方法,用于最小化传感器网络环境中的功耗
    • US07499376B2
    • 2009-03-03
    • US11633456
    • 2006-12-05
    • Jin Won KimSeung Min ParkIl Gon ParkKwang Yong LeeDoo Seop EomWon Hee LeeWoo Young LeeTae Young Kim
    • Jin Won KimSeung Min ParkIl Gon ParkKwang Yong LeeDoo Seop EomWon Hee LeeWoo Young LeeTae Young Kim
    • G01S3/80
    • G01S5/18G01S5/0289
    • Provided are a system and method for position awareness that can be used indoors in a large-scale environment and can minimize generation of radio frequency (RF) and ultrasonic waves in a wireless sensor network including low-priced sensor nodes capable of precise position measurement, thus improving energy efficiency by reducing unnecessary power consumption. The method includes the steps of: (a) calculating initial position coordinates using beacon information received from adjacent beacons through a broadcast beacon solicitation signal, sending a synchronization signal to the beacons, and synchronizing the beacons; (b) receiving ultrasonic waves generated from the adjacent beacons activated by a broadcast start message, and calculating position coordinates; and (c) when the calculated position coordinates correspond to a predetermined hand-off threshold position, transmitting a hand-off process message to a newly activated beacon, and executing a hand-off process routine.
    • 提供一种用于位置感知的系统和方法,其可以在大规模环境中室内使用,并且可以在包括能够进行精确位置测量的低价传感器节点的无线传感器网络中最小化射频(RF)和超声波的产生, 从而通过减少不必要的功率消耗来提高能量效率。 该方法包括以下步骤:(a)使用通过广播信标请求信号从相邻信标接收到的信标信息来计算初始位置坐标,向信标发送同步信号,并同步信标; (b)接收由广播开始消息激活的相邻信标产生的超声波,并计算位置坐标; 以及(c)当计算出的位置坐标对应于预定的切换阈值位置时,将切换处理消息发送到新激活的信标,并且执行切换处理程序。
    • 56. 发明授权
    • Method of providing routing protocol in sensor network
    • 在传感器网络中提供路由协议的方法
    • US07460532B2
    • 2008-12-02
    • US10951987
    • 2004-09-27
    • Changmin ShinSeung Min ParkJae Hyuk RyuYong Jin LimDae Young Kim
    • Changmin ShinSeung Min ParkJae Hyuk RyuYong Jin LimDae Young Kim
    • H04L12/28
    • H04W40/08H04L45/00H04L45/26Y02D70/142Y02D70/22Y02D70/324
    • A method of providing a routing protocol in a sensor network includes the steps of: initializing a routing table and searching a network device of a node to initialize a host; opening a socket when there is a request for forwarding of an IP (Internet Protocol) packet from an upper layer or when there is a request through the network device; determining whether there is the IP packet forwarding request of the upper layer node or whether the packet is received from the network device; if there is the IP packet forwarding request of the upper layer, searching the routing table, and determining whether or not there is a destination node which intends to transmit the packet, and returning to a main loop if there is the destination node; and if the packet is received through the network device, determining types of the received packets and performing RREQ (route request) process, IDLE process, RREP (route reply) process, RERR (route error) process, and RREP_ACK (route reply acknowledgement) process.
    • 在传感器网络中提供路由协议的方法包括以下步骤:初始化路由表并搜索节点的网络设备来初始化主机; 当存在从上层转发IP(因特网协议)分组的请求或者当通过网络设备存在请求时,打开套接字; 确定是否存在上层节点的IP分组转发请求或者是否从网络设备接收分组; 如果存在上层的IP分组转发请求,则搜索路由表,并确定是否存在要发送分组的目的地节点,并且如果存在目的地节点则返回到主循环; 如果通过网络设备接收到分组,则确定接收到的分组的类型并执行RREQ(路由请求)过程,IDLE进程,RREP(路由回复)进程,RERR(路由错误)进程和RREP_ACK(路由应答确认) 处理。