Personal location system

Details Personal location system Personal location system

1999-04-15

2001-01-02

Tong, Nina (Department: 2736)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S573400, C340S539230, C340S870030, C340S870030, C340S870030, C379S038000

Utility Patent

active

06169484

ABSTRACT:

This invention relates to a Personal Location System (PLS). One exemplary purpose of a PLS system is safety tracking used as an aid to locate people or animals, conceivably objects, but mostly for people and animals and especially those who are not necessarily able to care for themselves. As an example, it could be for children that wander outside of a building and you want to know when they go out, or it could be children that wander away from the yard. In which case it is assumed that they are not aware that they could be in personal danger and you can find them. Another example would be for people that can easily become confused or disoriented who might want or need to be tracked. As they go in and out of a house or beyond the yard (or some defined area) and possibly become disoriented, they might want assistance to get to where they want to go and could trigger for assistance or guidance. If someone else wants to know where they are, that action can be accomplished without the disoriented person's knowledge. It requires no voluntary action on the user's part to be located, but it can be used on a voluntary basis, that is, self-initiated if necessary. The system covers two specific areas, one is a local or internal area that would be very localized, to be within a home, within a school or a nursery or a hospital as examples, and the system identifies when a subject transitions between this local area and the wide area. It can, however, also respond to an emergency service request initiated by the individual in that zone. The second area we describe is a wide area or exterior area. In this case, the invention applies within a neighborhood or a town or city or metropolitan area, e.g. away from the person's usual home or nursery. In this particular case, the system does a personal radio interrogation and determines position involuntarily by transmission by the user's set. It does a bearing and range check, preferably using range and bearing measurements as disclosed in our application Ser. No. 09/025,092 filed Feb. 17, 1998 for POSITIONING SYSTEM FOR CDMA/PCS COMMUNICATIONS SYSTEMS or our application Ser. No. 60/038,838, filed Feb. 18, 1997 for A PHASE AGILE ANTENNA FOR USE IN POSITION DETERMINATION. Again in this area, an emergency service request would be honored, and that could be initiated by the individual himself.
Thus, the object of the invention is to provide a personal location system for local and wide areas which is low in cost and is highly effective.


REFERENCES:
patent: 5731757 (1998-03-01), Layson, Jr.
patent: 5742233 (1998-04-01), Hoffman et al.
patent: 5838237 (1998-11-01), Revell et al.
patent: 5870029 (1999-02-01), Otto et al.
patent: 5917425 (1999-06-01), Crimmins et al.

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