Method of adjusting PCS threshold and terminal apparatus for high density wireless network
    11.
    发明授权
    Method of adjusting PCS threshold and terminal apparatus for high density wireless network 失效
    调整PCS阈值的方法和高密度无线网络的终端设备

    公开(公告)号:US08189462B2

    公开(公告)日:2012-05-29

    申请号:US12495549

    申请日:2009-06-30

    IPC分类号: H04J1/16

    CPC分类号: H04W4/00

    摘要: Provided are a method of adjusting a PCS threshold in a wireless network, and a terminal apparatus for the wireless network. The method and the apparatus determines whether to adjust the PCS threshold to use a shared channel for transmitting data in a wireless network based on a congestion status of the shared channel, and adjusts the PCS threshold based on a packet loss measured for a predetermined period of time.

    摘要翻译: 提供了一种在无线网络中调整PCS阈值的方法,以及用于无线网络的终端装置。 该方法和装置基于共享信道的拥塞状态来确定是否调整PCS阈值以使用用于在无线网络中发送数据的共享信道,并且基于在预定时间段内测量的分组丢失来调整PCS阈值 时间。

    Method of recognizing RFID tag for the purpose of preventing throughput inversion and RFID reader performing the same
    12.
    发明授权
    Method of recognizing RFID tag for the purpose of preventing throughput inversion and RFID reader performing the same 有权
    识别RFID标签以防止吞吐量反转和执行相同的RFID读取器的方法

    公开(公告)号:US08525645B2

    公开(公告)日:2013-09-03

    申请号:US12494225

    申请日:2009-06-29

    CPC分类号: H04Q9/00 H04Q2209/47

    摘要: A method of recognizing a tag in an RFID reader includes: obtaining a predetermined frame size in the case where throughput obtained by reflecting a slot length based on the remaining number of tags except for recognized tags within a frame progressing current tag recognition that substantially has a maximum value; and when the current frame size is different from the predetermined frame size, stopping the current progress of frame and changing the current frame size into the expected frame size. The method of recognizing a tag may further include when the current frame size is equal to the expected frame size, changing the current frame size into the frame size that does not cause a throughput inversion phenomenon for the remaining number of tags to be recognized within the frame progressing the current tag recognition. By the throughput inversion phenomenon, the occurrence of throughput loss can be prevented and the tag recognition time is reduced to recognize the tags at high speed.

    摘要翻译: 识别RFID读取器中的标签的方法包括:在基本上具有一个帧的进行当前标签识别的帧的基础上,基于除了识别的标签之外的标签的剩余数量反映槽长度所获得的吞吐量的情况下,获得预定的帧大小 最大值 并且当当前帧大小与预定帧大小不同时,停止帧的当前进度并将当前帧大小改变为预期帧大小。 识别标签的方法还可以包括当当前帧大小等于预期帧大小时,将当前帧大小改变为帧大小,其不会在剩余数量的标签中识别吞吐量反转现象 框架进行当前的标签识别。 通过吞吐量反转现象,可以防止吞吐量损失的发生,并且降低标签识别时间以高速识别标签。

    Navigation apparatus and method using RFID
    13.
    发明授权
    Navigation apparatus and method using RFID 有权
    使用RFID的导航装置和方法

    公开(公告)号:US07978066B2

    公开(公告)日:2011-07-12

    申请号:US12038703

    申请日:2008-02-27

    IPC分类号: G08B1/08

    摘要: Disclosed is a navigation apparatus and method using RFID that is capable of providing information on a current position and a moving direction to the destination. An antenna unit has directivity in a predetermined direction and receives at least one radio signal transmitted from at least one RFID tag. An RFID reader converts the at least one radio signal provided by the antenna unit into information on the at least one RFID tag in a digital form, measures the reception strength of the at least one radio signal, and provides the information on the at least one RFID tag and information on the received strength. A control unit determines the current position and moving direction on the basis of the information on the at least one RFID tag and the information on the reception strength provided from the RFID reader. Accordingly, it is possible to accurately recognize the current position and the moving direction of the navigation apparatus and guide the moving direction to the destination.

    摘要翻译: 公开了一种使用RFID的导航装置和方法,其能够向目的地提供关于当前位置和移动方向的信息。 天线单元在预定方向上具有方向性并且接收从至少一个RFID标签发射的至少一个无线电信号。 RFID读取器将由天线单元提供的至少一个无线电信号以数字形式转换成关于至少一个RFID标签的信息,测量至少一个无线电信号的接收强度,并提供至少一个 RFID标签和关于接收强度的信息。 控制单元基于关于至少一个RFID标签的信息和从RFID读取器提供的接收强度的信息来确定当前位置和移动方向。 因此,可以准确地识别导航装置的当前位置和移动方向,并将移动方向引导到目的地。

    Cross-layer routing method in wireless sensor network
    15.
    发明授权
    Cross-layer routing method in wireless sensor network 有权
    无线传感器网络中的跨层路由方法

    公开(公告)号:US08102794B2

    公开(公告)日:2012-01-24

    申请号:US12193181

    申请日:2008-08-18

    IPC分类号: H04J1/10

    CPC分类号: H04B7/155 H04W40/12 H04W40/22

    摘要: Provided is a cross-layer routing method in a wireless sensor network including: locating a destination node which is a final destination of data by a source node which generates the data; and determining an optimal relay node among one or more neighboring nodes using their position information for each hop and forwarding the data from the source node to the destination node through the determined relay nodes. Therefore, an effective and stable routing which reduces overheads of additional control messages used for stable data forwarding and reduces collisions in a shared channel by using wireless link layer characteristics can be implemented.

    摘要翻译: 提供了一种无线传感器网络中的跨层路由选择方法,包括:通过生成数据的源节点定位作为数据的最终目的地的目的地节点; 以及使用其每一跳的位置信息确定一个或多个相邻节点之间的最佳中继节点,并且通过所确定的中继节点将数据从源节点转发到目的地节点。 因此,可以实现有效和稳定的路由,其减少用于稳定数据转发的附加控制消息的开销,并且通过使用无线链路层特性减少共享信道中的冲突。

    METHOD OF ADJUSTING PCS THRESHOLD AND TERMINAL APPARATUS FOR HIGH DENSITY WIRELESS NETWORK
    16.
    发明申请
    METHOD OF ADJUSTING PCS THRESHOLD AND TERMINAL APPARATUS FOR HIGH DENSITY WIRELESS NETWORK 失效
    调整PCS阈值和终端设备的高密度无线网络的方法

    公开(公告)号:US20100008226A1

    公开(公告)日:2010-01-14

    申请号:US12495549

    申请日:2009-06-30

    IPC分类号: G08C15/00 H04W4/00

    CPC分类号: H04W4/00

    摘要: Provided are a method of adjusting a PCS threshold in a wireless network, and a terminal apparatus for the wireless network. The method and the apparatus determines whether to adjust the PCS threshold to use a shared channel for transmitting data in a wireless network based on a congestion status of the shared channel, and adjusts the PCS threshold based on a packet loss measured for a predetermined period of time.

    摘要翻译: 提供了一种在无线网络中调整PCS阈值的方法,以及用于无线网络的终端装置。 该方法和装置基于共享信道的拥塞状态来确定是否调整PCS阈值以使用用于在无线网络中发送数据的共享信道,并且基于在预定时间段内测量的分组丢失来调整PCS阈值 时间。

    SECURITY SYSTEM USING LASER RANGE FINDER AND METHOD OF DETECTING INTRUDER USING LASER RANGE FINDER
    17.
    发明申请
    SECURITY SYSTEM USING LASER RANGE FINDER AND METHOD OF DETECTING INTRUDER USING LASER RANGE FINDER 失效
    使用激光测距仪的安全系统和使用激光测距仪检测入射器的方法

    公开(公告)号:US20090091446A1

    公开(公告)日:2009-04-09

    申请号:US12244766

    申请日:2008-10-02

    IPC分类号: G08B13/18 G01C3/08 H04N7/18

    摘要: A security system using a laser range finder that can precisely determine an existence and a location of an intruder, and a method of detecting the intruder using the laser range finder are provided. The security system using a laser range finder, the security system includes: the laser range finder emitting laser beam, receiving the reflected laser beam, measuring a distance between the laser range finder and a target object, and detecting an existence and a location of an intruder; and at least one reflective means reflecting the emitted laser beam toward the laser beam finder, wherein at least one reflective means is spaced by a predetermined distance of the laser range finder and is installed a predetermined distance from the laser range finder.

    摘要翻译: 提供了使用能够精确地确定入侵者的存在和位置的激光测距仪的安全系统,以及使用激光测距仪检测入侵者的方法。 使用激光测距仪的安全系统,安全系统包括:激光测距仪发射激光束,接收反射的激光束,测量激光测距仪与目标物体之间的距离,以及检测激光测距仪的存在和位置 入侵者 以及至少一个将发射的激光束反射到激光束取景器的反射装置,其中至少一个反射装置与激光测距仪隔开预定距离,并且与激光测距仪安装预定距离。