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    3.
    发明专利
    未知

    公开(公告)号：DE112004001004T5

    公开(公告)日：2006-04-27

    申请号：DE112004001004

    申请日：2004-06-10

    Applicant: MOTOROLA INC

    Inventor： CALLAWAY EDGAR H ,  BOURGEOIS MONIQUE J

    IPC: G08C17/00 ,  H04Q7/24

    Abstract: An "identical beacons" field ( 401 ) is inserted near the beginning of a transmitted beacon ( 403 ) that contains either an integer equal to the number of consecutive identical beacons sent (i.e., identical to the one presently being transmitted) or a repetition bit indicating whether or not the beacon contains changed information when compared to a prior-sent beacon. After sleeping awhile, a node ( 302 - 304 ) wakes up, receives a first portion of the beacon containing the identical beacons field, and analyzes the identical beacons field. Based on the analysis, the node makes a decision on whether to remain "awake" for reception of the remaining beacon or to return to sleep.

    METHOD AND APPARATUS FOR LOCATION ESTIMATION
    4.
    发明申请
    METHOD AND APPARATUS FOR LOCATION ESTIMATION 审中-公开
    用于位置估计的方法和装置

    公开(公告)号：WO02054100A3

    公开(公告)日：2003-08-14

    申请号：PCT/US0148986

    申请日：2001-12-19

    Applicant: MOTOROLA INC

    Inventor： PATWARI NEAL K ,  O'DEA ROBERT J ,  ALLEN VERNON A ,  PERKINS MATTHEW R ,  BOURGEOIS MONIQUE J

    IPC: G01S5/00 ,  G01S5/02 ,  G01S11/02 ,  G01S13/84 ,  G01S19/25 ,  G01S3/02

    CPC classification number: G01C21/206 ,  G01S5/0018 ,  G01S5/0072 ,  G01S5/0289 ,  G01S11/02 ,  G01S13/84 ,  G01S2205/002

    Abstract: A system for locating a number of devices (112-130) by measuring signals transmitted between known location devices (112-118, 134-138, 214-218, 224-228) and unknown location devices (120-130, 222), and signals transmitted between pairs of unknown location devices (120-130,222), entering signal measurements into a graph function that includes a number of first sub-expressions, a number of which include signal measurement prediction sub-expressions, and have extrema when a predicted signal measurement is equal to an actual signal measurement, and optimizing the graph function.

    Abstract translation: 一种用于通过测量在已知位置设备（112-118,134-138,214-218,224-228）和未知位置设备（120-130,222）之间传输的信号来定位多个设备（112-130）的系统， 以及在未知位置设备对（120-130,222）之间传输的信号，将信号测量值输入到包括多个第一子表达式的图形函数中，其中多个第一子表达式包括信号测量预测子表达式，并且当预测 信号测量等于实际信号测量，并优化图形功能。

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