Positioning technique

Details Positioning technique Positioning technique

2007-11-20

2007-11-20

Eng, George (Department: 2617)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S456100, C455S456500, C455S067110, C455S067700

Reexamination Certificate

active

11030334

ABSTRACT:
A target device's location in a radio network is estimated by maintaining a probabilistic model for several sample points that indicate expected distributions of signal values at a given location. The target device observes signal values, wherein the sequence of observations and the respective locations constitute a Hidden Markov Model. A graph models the topology of the positioning environment. The graph indicates several nodes which are permissible locations in the environment and several arcs which are permissible transitions between two nodes. The graph is used to estimate the target device's location based on the probabilistic model and the sequence of observations.

REFERENCES:
patent: 5781150 (1998-07-01), Norris
patent: 6263208 (2001-07-01), Chang et al.
patent: 6269246 (2001-07-01), Rao et al.
patent: 6275186 (2001-08-01), Kong
patent: 6393294 (2002-05-01), Perez-Breva et al.
patent: 6397073 (2002-05-01), Hottinen
patent: 6477380 (2002-11-01), Uehara et al.
patent: 6782265 (2004-08-01), Perez-Breva et al.
patent: 2003/0064735 (2003-04-01), Spain et al.
patent: 1 022 578 (2000-07-01), None
patent: H10-051840 (1998-02-01), None
patent: WO 01/33825 (2001-05-01), None
patent: WO 01/58195 (2001-08-01), None
Millymaki et al, “A Probabilistic Approach to WLAN User Location Estimation”, The Third IEEE Workshop on Wireless local Area Networks, Sep. 2001.
Piaggio et al, “Global localization via sub-graph isomorphism”, 1999 Third European Workshop on Advanced Mobile Robots, 1999, pp. 151-158.
Duckett et al, “Knowing Your Place in Real World Environments”, 1999 Third European Workshop on Advanced Mobil Robots, 1999 pp. 135-142.

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