Field unit for use in a GPS system
First Claim
1. A system for monitoring a field unit associated with a predetermined object, comprising:
- a GPS reception unit configured to receive position information from a plurality of GPS satellites;
an environmental circuit configured to sense environmental conditions and produce an environmental signal representative of the environmental conditions a transmitter configured to transmit the position information and the environmental signal via radio frequency communications upon interrogation from a base station;
said transmitter is further configured to initiate communications with a base station and transmit the position information and the environmental signal via cellular communications where said field unit is outside a predetermined range from said base station;
the environmental circuit comprises a memory storage for storing object information pertaining to the object;
the environmental signal further comprises data representing the object information stored in the memory storage; and
wherein the reception unit, the environmental circuit and the transmitter reside in the field unit.
9 Assignments
0 Petitions
Accused Products
Abstract
A system is provided for communicating location and other related information of a field unit to a remote base station. The field unit generates position signals based on signals received from communication with a plurality of GPS satellites. These position signals are transmitted to a remote base station, where they are processed and displayed. The field unit includes an environmental circuit having devices for determining an environmental condition and producing an environmental signal representative of the environmental condition. The environmental signal is also transmitted to the remote base station for processing and display. The field unit is also provided with a cellular link circuit for transmitting the position signals and the environmental signal to the remote base station via a cellular link.
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Citations
77 Claims
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1. A system for monitoring a field unit associated with a predetermined object, comprising:
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a GPS reception unit configured to receive position information from a plurality of GPS satellites;
an environmental circuit configured to sense environmental conditions and produce an environmental signal representative of the environmental conditions a transmitter configured to transmit the position information and the environmental signal via radio frequency communications upon interrogation from a base station;
said transmitter is further configured to initiate communications with a base station and transmit the position information and the environmental signal via cellular communications where said field unit is outside a predetermined range from said base station;
the environmental circuit comprises a memory storage for storing object information pertaining to the object;
the environmental signal further comprises data representing the object information stored in the memory storage; and
wherein the reception unit, the environmental circuit and the transmitter reside in the field unit.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A system for monitoring a field unit associated with an object, comprising:
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means for receiving position information from a plurality of GPS satellites;
means for sensing environmental conditions;
means for producing an environmental signal representative of the environmental conditions comprising a storage means for storing object data pertaining to said object;
means for transmitting the position information, object data and the environmental signal via radio frequency communications upon interrogation from a base station; and
said means for transmitting is further configured to initiate communications with a base station and transmit said position information, object data and environmental signal via cellular communication where said field unit is outside a predetermined range from said base station. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50)
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51. A system for monitoring a field unit, comprising the steps of:
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receiving position information from a plurality of GPS satellites;
sensing environmental conditions;
retrieving object data representing information pertaining to an associated object;
producing an environmental signal representative of the environmental conditions and the object data; and
transmitting the position information and the environmental signal upon interrogation from a base station and where said field unit is outside a predetermined range from said base station, initiating cellular communications with said base station to transmit said position information and said environmental signal. - View Dependent Claims (52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65)
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66. A field unit comprising:
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a GPS reception unit configured to receive position information from a plurality of GPS satellites;
an environmental circuit configured to sense environmental conditions and produce an environmental signal representative of the environmental conditions;
a transmitter configured to transmit the position information and the environmental signal via connection radio frequency communications upon interrogation from a base station;
said transmitter is further configured to initiate communications with a base station via cellular communications where said field unit is outside a predetermined range from said base station;
the environmental circuit comprises a memory storage for storing object information pertaining to the object;
the environmental signal further comprises data representing the object information stored in the memory storage;
wherein the reception unit, the environmental circuit and the transmitter reside in the field unit; and
wherein the field unit is associated with a predetermined object. - View Dependent Claims (67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77)
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Specification