Method and apparatus for avoiding collision between each of radio frequency identification readers
    4.
    发明授权
    Method and apparatus for avoiding collision between each of radio frequency identification readers 失效
    用于避免每个射频识别读取器之间的冲突的方法和装置

    公开(公告)号:US07893836B2

    公开(公告)日:2011-02-22

    申请号:US12039476

    申请日:2008-02-28

    IPC分类号: G08B13/14

    摘要: 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.

    摘要翻译: 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。

    AUTOMATIC VENDING SYSTEM USING RFID AND METHOD THEREOF
    5.
    发明申请
    AUTOMATIC VENDING SYSTEM USING RFID AND METHOD THEREOF 审中-公开
    使用RFID的自动维修系统及其方法

    公开(公告)号:US20080093444A1

    公开(公告)日:2008-04-24

    申请号:US11745647

    申请日:2007-05-08

    IPC分类号: G06F7/08

    CPC分类号: G07F9/026 G06Q20/3278

    摘要: Provided is an automatic vending system using RFID technology including a multi-tag unit including a plurality of RFID tags which store product sales information; and a sales management unit which receives a message of purchase request including information on a purchase requested product, checks if the purchase requested product is in stock based on the product sales information which is stored in the RFID tags, and sells the product if it is in stock.

    摘要翻译: 提供了一种使用RFID技术的自动售货系统,其包括包含存储产品销售信息的多个RFID标签的多标签单元; 以及销售管理单元,其接收包括购买请求产品的信息的购买请求消息,基于存储在RFID标签中的产品销售信息来检查购买请求的产品是否库存,并且如果是 有现货。

    Method of transmitting/receiving data in sensor network for reducing overhearing of sensor nodes
    6.
    发明授权
    Method of transmitting/receiving data in sensor network for reducing overhearing of sensor nodes 失效
    传感器网络中传输/接收数据的方法,以减少传感器节点的检测

    公开(公告)号:US08089909B2

    公开(公告)日:2012-01-03

    申请号:US12149255

    申请日:2008-04-29

    IPC分类号: G08C17/00 H04J3/16 H04J3/22

    摘要: Provided is a method of transmitting/receiving data in a sensor node for reducing overhearing of sensor nodes, and a sensor network which implements the method. A sender node having transmission data from among a plurality of nodes which perform a low power listening (LPL) operation in an asynchronous manner at predetermined time intervals, generates a long preamble including short preambles, each having information including a destination address of the transmission data, a remainder of the long preamble, and a length of the transmission data, and sequentially transmits the second preamble and the transmission data. A receiver node from among the plurality of nodes determines whether a valid signal is sensed during an active state in the LPL operation. If it is determined that the valid signal is sensed, the receiver node receives the short preamble transmitted from the sender node. The receiver node determines a duration time of a deactivated state of the receiver node based on the received first preamble, thereby reducing overhearing in the sensor network.

    摘要翻译: 提供了一种在传感器节点中发送/接收数据以减少传感器节点的窃听的方法,以及实现该方法的传感器网络。 具有以预定时间间隔以异步方式执行低功率监听(LPL)操作的多个节点的发送数据的发送方节点生成包括短前导码的长前导码,每个具有包含发送数据的目的地地址的信息 ,长前导码的剩余部分和发送数据的长度,并顺序发送第二前同步码和发送数据。 多个节点中的接收器节点确定在LPL操作中的活动状态期间是否感测到有效信号。 如果确定感测到有效信号,则接收器节点接收从发送器节点发送的短前置码。 接收机节点基于接收到的第一前导码来确定接收机节点的去激活状态的持续时间,从而减少传感器网络中的窃听。

    Antenna apparatus for linearly polarized diversity antenna in RFID reader and method of controlling the antenna apparatus
    7.
    发明授权
    Antenna apparatus for linearly polarized diversity antenna in RFID reader and method of controlling the antenna apparatus 失效
    RFID读取器中的线性极化分集天线的天线装置及天线装置的控制方法

    公开(公告)号:US07804455B2

    公开(公告)日:2010-09-28

    申请号:US11782195

    申请日:2007-07-24

    IPC分类号: H01Q21/00

    摘要: Provided are an antenna apparatus for linearly polarized diversity antennas in a radio frequency identification (RFID) reader, and a method of controlling the antenna apparatus. The antenna apparatus includes: a plurality of linearly polarized diversity antennas disposed to have different directions to one another; a switching unit connecting the linearly polarized diversity antennas to the RFID reader; and a controller controlling the switching unit to selectively activate the linearly polarized diversity antennas.

    摘要翻译: 提供了一种用于射频识别(RFID)读取器中的线性极化分集天线的天线装置和控制天线装置的方法。 天线装置包括:多个线性极化分集天线,被设置为具有彼此不同的方向; 将线性极化分集天线连接到RFID读取器的开关单元; 以及控制器,控制所述切换单元选择性地激活所述线性极化分集天线。

    SYSTEM AND METHOD FOR HIERARCHICALLY COMMUNICATING INFORMATION USING CACHE SERVER
    8.
    发明申请
    SYSTEM AND METHOD FOR HIERARCHICALLY COMMUNICATING INFORMATION USING CACHE SERVER 审中-公开
    使用高速缓存服务器进行信息交换的系统和方法

    公开(公告)号:US20080140810A1

    公开(公告)日:2008-06-12

    申请号:US11947547

    申请日:2007-11-29

    IPC分类号: G06F15/16

    CPC分类号: H04L67/12 H04L67/2842

    摘要: Provided is a method and system for hierarchically communicating information between a user and an information providing server that provides information requested by the user. The system includes at least one sensor node, upon receipt of an information request message sent by the user through a terminal, searching for information corresponding to the information request message in a first cache mounted therein and sending the information request message if the corresponding information is not found in the first cache, and a cache server, upon receipt of the information request message from the at least one sensor node, searching for the information corresponding to the information request message in a second cache mounted therein, sending the information request message to the information providing server if the corresponding information is not found in the second cache, receiving the corresponding information, transmitting the received information to the sensor node, and updating the second cache.

    摘要翻译: 提供了一种用于在用户和提供用户请求的信息的信息提供服务器之间分层传送信息的方法和系统。 该系统包括至少一个传感器节点,当接收到用户通过终端发送的信息请求消息时,在安装在其中的第一高速缓存中搜索对应于该信息请求消息的信息,并且如果相应的信息是 在第一高速缓存中没有找到缓存服务器;以及缓存服务器,在从所述至少一个传感器节点接收到所述信息请求消息时,在安装在其中的第二高速缓存器中搜索对应于所述信息请求消息的信息,将所述信息请求消息发送到 信息提供服务器,如果在第二高速缓存中没有找到对应的信息,则接收对应的信息,将所接收的信息发送到传感器节点,并更新第二高速缓存。

    Apparatus for measuring read range between RFID tag and reader
    9.
    发明授权
    Apparatus for measuring read range between RFID tag and reader 失效
    用于测量RFID标签和阅读器之间读取范围的设备

    公开(公告)号:US07161357B2

    公开(公告)日:2007-01-09

    申请号:US11296056

    申请日:2005-12-07

    IPC分类号: G01R29/00

    摘要: Provided is an apparatus for measuring a read range between a tag and a reader, which includes an electromagnetic anechoic chamber formed by connecting at least one unit cell in a row, the unit cell having an electromagnetic wave absorbent provided on an inner wall of each unit cell, an electromagnetic generation portion located at the unit cell at an end of the electromagnetic anechoic chamber and transmitting an electromagnetic wave through an antenna, and an electromagnetic measurement portion which measures a field strength of the electromagnetic wave transmitted from the electromagnetic generation portion using an electric field probe moving in the electromagnetic anechoic chamber.

    摘要翻译: 提供了一种用于测量标签和读取器之间的读取范围的装置,其包括通过连接至少一个单元电池而形成的电磁消声室,该单元具有设置在每个单元的内壁上的电磁波吸收器 电池,位于电磁波暗室的端部处的单元的电磁产生部,通过天线透射电磁波;电磁测量部,其使用电磁波发生部测量从电磁产生部发射的电磁场的场强 电磁探测器在电磁消声室中移动。

    Lower power battery-assisted RFID tag having improved recognition distance, and wake-up method thereof
    10.
    发明授权
    Lower power battery-assisted RFID tag having improved recognition distance, and wake-up method thereof 有权
    具有改进的识别距离的低功率电池辅助RFID标签及其唤醒方法

    公开(公告)号:US07884723B2

    公开(公告)日:2011-02-08

    申请号:US11928288

    申请日:2007-10-30

    IPC分类号: G08B13/14

    CPC分类号: G06K19/07749 G06K19/0705

    摘要: Provided are a radio frequency identification (RFID) tag and a wake-up method thereof. The RFID tag includes: a power source that supplies a driving voltage; a continuous wave detector that receives the driving voltage from the power supply so as to detect a continuous wave in a signal received from an RFID tag reader; a command detector that selectively receives the driving voltage and detects a command in the signal; and a controller that executes the command detected by the command detector by supplying the driving voltage to the command detector if the continuous wave is detected, and stops the driving voltage from being supplied to the command detector if no command is received from the command detector for a predetermined time period.

    摘要翻译: 提供射频识别(RFID)标签及其唤醒方法。 RFID标签包括:提供驱动电压的电源; 连续波检测器,其从所述电源接收所述驱动电压,以便检测从RFID标签读取器接收的信号中的连续波; 命令检测器,其选择性地接收所述驱动电压并检测所述信号中的命令; 以及控制器,如果检测到连续波,则执行由指令检测器检测到的指令,将驱动电压提供给指令检测器,并且如果没有从命令检测器接收到命令,则将驱动电压提供给命令检测器, 预定时间段。