Synchronization method between reader and tag
    1.
    发明授权
    Synchronization method between reader and tag 有权
    阅读器和标签之间的同步方法

    公开(公告)号:US08274374B2

    公开(公告)日:2012-09-25

    申请号:US12265205

    申请日:2008-11-05

    IPC分类号: H04Q5/22 G08B13/14 G04F1/00

    CPC分类号: G06K7/0008

    摘要: Disclosed is a synchronization method between a reader and tag according to an example embodiment, the method including: transmitting, by the reader, a first write command message to the tag at a first time; detecting, by the tag, the first write command message from the reader at a second time and transmitting a first response message to the reader in response to the first write message; transmitting, by the reader, a second write command message including first time information of the first time to the tag; and correcting, by the tag, a clock offset using a difference between the first time and the second time.

    摘要翻译: 公开了根据示例实施例的读取器和标签之间的同步方法,所述方法包括:由读取器在第一时间向标签发送第一写入命令消息; 通过标签在第二时间从读取器检测第一写入命令消息,并响应于第一写入消息向读取器发送第一响应消息; 由读取器发送包含第一次的第一时间信息到标签的第二写入命令消息; 以及使用所述第一时间和所述第二时间之间的差异,通过所述标签来校正时钟偏移。

    Apparatus and method for computing location of a moving beacon using received signal strength and multi-frequencies
    10.
    发明授权
    Apparatus and method for computing location of a moving beacon using received signal strength and multi-frequencies 失效
    使用接收信号强度和多频率计算移动信标位置的装置和方法

    公开(公告)号:US08040280B2

    公开(公告)日:2011-10-18

    申请号:US12096780

    申请日:2006-12-08

    IPC分类号: G01S5/04

    CPC分类号: G01S5/10

    摘要: Provided is an apparatus and method for computing the location of a radio beacon by using received signal strength (RSS) and multiple frequencies. The apparatus and method of the present invention computes the location of a radio beacon without limitation in distance by using multiple frequencies and received signal strength to resolve the problem of phase ambiguity. A radio beacon location computing system includes a plurality of base stations configured to receive signals of multiple frequencies transmitted from the radio beacon, and detect and output phase differences and received signal strength; and a location computing server configured to receive the phase differences and the received signal strength outputted from the respective base stations, acquire calculation distances based on the phase differences, remove phase ambiguity from the calculation distances based on the received signal strength, and compute the location of the radio beacon.

    摘要翻译: 提供了一种通过使用接收信号强度(RSS)和多个频率来计算无线电信标的位置的装置和方法。 本发明的装置和方法通过使用多个频率和接收信号强度来计算无线电信标的位置而不限制距离,以解决相位模糊问题。 无线电信标位置计算系统包括:多个基站,被配置为接收从无线电信标发送的多个频率的信号,并检测和输出相位差和接收信号强度; 以及位置计算服务器,被配置为接收从各个基站输出的相位差和接收信号强度,基于相位差获取计算距离,基于接收到的信号强度从计算距离中消除相位模糊度,并且计算位置 的无线电信标。