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    • 91. 发明授权
    • Wake-up receiver and wake-up method using duty cycling and power off technique
    • 唤醒接收机和唤醒方式,使用负载循环和关机技术
    • US08285243B2
    • 2012-10-09
    • US12808766
    • 2008-12-03
    • Ho-Yong KangDae-Young YoonTrung-Kien NguyenJi-Eun KimXiaohua YuNae-Soo KimCheol-Sig PyoSeok-Kyun HanSang-Gug Lee
    • Ho-Yong KangDae-Young YoonTrung-Kien NguyenJi-Eun KimXiaohua YuNae-Soo KimCheol-Sig PyoSeok-Kyun HanSang-Gug Lee
    • H04B1/16
    • H04W52/0229Y02D70/122Y02D70/166
    • Provided is a low-power wake-up receiver that is sensitive to electric waves, by which power consumed by a radio frequency (RF) transceiver of a sensor node in a ubiquitous sensor network (USN) is minimized. A wake-up receiver waking up a main transceiver includes a duty cycle signal generation unit controlling a duty cycle of a duty cycle signal; a burst signal detection unit receiving an input signal including a burst signal and a data signal based on the duty cycle signal, amplifying the input signal, and, if the amplified input signal is the burst signal, outputting a control signal; and a data signal detection unit re-amplifying the amplified input signal based on the control signal, and, if the re-amplified input signal is the data signal, outputting a wake-up signal. Power supplied to the duty cycle signal generation unit is interrupted based on the control signal and power is re-supplied to the duty cycle signal generation unit based on the wake-up signal.
    • 提供了一种对电波敏感的低功率唤醒接收机,通过这种接收器可以最小化无处不在的传感器网络(USN)中的传感器节点的射频(RF)收发器所消耗的功率。 唤醒主收发器的唤醒接收机包括:占空比信号发生单元,控制占空比信号的占空比; 突发信号检测单元,基于占空比信号接收包括脉冲串信号和数据信号的输入信号,放大输入信号,如果放大的输入信号是脉冲串信号,则输出控制信号; 并且数据信号检测单元基于控制信号对放大的输入信号进行再放大,并且如果再放大的输入信号是数据信号,则输出唤醒信号。 基于该控制信号,中断向占空比信号生成部供给的电力,并根据该唤醒信号将功率重新提供给占空比信号生成部。
    • 92. 发明授权
    • Beacon scheduling system and method for preventing beacon overlapping
    • 信标调度系统和防止信标重叠的方法
    • US08121080B2
    • 2012-02-21
    • US11947342
    • 2007-11-29
    • Young-Hwan HamSun-Joong KimCheol-Sig Pyo
    • Young-Hwan HamSun-Joong KimCheol-Sig Pyo
    • H04W4/00
    • H04W16/10H04W48/12H04W84/18
    • Provided are a beacon scheduling system and method for preventing beacon overlapping in a ZigBee network including routers each with a beacon slot number according to a specific time slot. The system includes: a first router periodically transmitting beacons at a beacon interval according to a specific time slot; and a second router finding the beacon interval by scanning the beacons transmitted by the first router and transmitting beacons within the beacon interval in consideration of a superframe period for transmitting data. When a router in a sensor network operates, the router can efficiently select the beacon transmission time, and a sink node manages beacon overlapping between all the routers. Therefore, stable, low-energy consumption, and excellent performance sensor networking environments can be established in a beacon mode.
    • 提供了一种用于防止ZigBee网络中的信标重叠的信标调度系统和方法,包括根据特定时隙具有信标时隙号的路由器。 该系统包括:第一路由器根据特定时隙周期性地以信标间隔发送信标; 以及第二路由器,通过扫描由第一路由器发送的信标并在考虑用于发送数据的超帧周期之内在信标间隔内发送信标来找到信标间隔。 当传感器网络中的路由器运行时,路由器可以有效地选择信标传输时间,并且汇聚节点管理所有路由器之间的信标重叠。 因此,可以在信标模式下建立稳定,低能耗和卓越性能的传感器网络环境。
    • 95. 发明申请
    • APPARATUS AND METHOD FOR COMMUNICATION IN WIRELESS SENSOR NETWORK
    • 无线传感器网络通信的装置和方法
    • US20110116414A1
    • 2011-05-19
    • US12808509
    • 2008-03-18
    • Eun-Ju LeeJae-Hong RyuByeong-Cheol ChoiBong-Wan KimBong-Soo KimCheol-Sig PyoJong-Suk Chae
    • Eun-Ju LeeJae-Hong RyuByeong-Cheol ChoiBong-Wan KimBong-Soo KimCheol-Sig PyoJong-Suk Chae
    • H04W4/00H04L12/28
    • H04W72/08H04W24/04H04W84/18
    • Provided are a bridge system, a network management server, and communication methods at the bridge system and the network management server for efficient communication in a wireless sensor network (WSN). The communication method at the network management server includes communicating with bridge systems connected with a plurality of radio frequency (RF) regions within a personal area network (PAN) composed of sensor nodes using the same wireless channel, in which radio signals of the sensor nodes within the PAN reach the bridge systems, searching for a new channel to be used and an alternative bridge system which is to perform a channel change into the new channel based on information about the bridge systems upon receipt of an association failure report message from an error bridge system which is reported of an association failure from the RF region from among the bridge systems, sending a channel change request message to the found alternative bridge system, and adjusting channel information for the found alternative bridge system to the new channel and replacing information about sensor nodes connected to the found alternative bridge system with information about sensor nodes that are newly connected with the found alternative bridge system through the new channel.
    • 提供桥接系统,网络管理服务器,桥接系统和网络管理服务器的通信方法,用于无线传感器网络(WSN)中的高效通信。 网络管理服务器的通信方法包括与使用相同无线信道的由传感器节点组成的个人区域网络(PAN)内的多个射频(RF)区域连接的桥接系统进行通信,其中传感器节点 在PAN内到达桥系统,搜索要使用的新信道和替代桥接系统,该桥接系统在从错误接收到关联故障报告消息时基于关于桥系统的信息来执行信道改变到新信道 报告了来自桥接系统中的RF区域的关联失败的桥接系统,向找到的替代桥接系统发送信道改变请求消息,以及将找到的替代网桥系统的信道信息调整到新信道,并替换关于 传感器节点连接到找到的替代桥接系统,其中包含有关传感器节点的信息 通过新渠道与找到的替代桥梁系统新连接。