GPS receiver using a message system for reducing power consumption
First Claim
1. A method in a positioning system, comprising steps of:
- retaining in a base station a database for a stored remote location for a remote positioning apparatus;
transmitting from said base station a base message signal having location-determination information selected according to said stored remote location; and
receiving said base message signal at said remote positioning apparatus for aiding a determination of a new remote location of said remote positioning apparatus.
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Accused Products
Abstract
A message system, global positioning system (GPS) receiver apparatus, and method for providing a fast time to first location fix and a low average power consumption in a GPS receiver. The message system includes a GPS base station for receiving a GPS signal and providing GPS acquisition and location information including GPS satellite visibility, health, and ephemeris; and a message system manager for transmitting a radio message signal including a wakeup call and the GPS information. A message transceiver or receiver receives the radio message signal and passes the wakeup call and GPS information to a GPS receiver having a low power standby mode. The GPS receiver awakens from the standby mode and enters an operational mode for using the GPS information for acquiring the GPS signal and deriving the first location fix. In a first embodiment, the GPS receiver initiates the first fix by requesting the message transceiver to transmit a radio request signal. In a second embodiment, message system initiates the first fix by transmitting the radio message signal.
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Citations
12 Claims
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1. A method in a positioning system, comprising steps of:
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retaining in a base station a database for a stored remote location for a remote positioning apparatus; transmitting from said base station a base message signal having location-determination information selected according to said stored remote location; and receiving said base message signal at said remote positioning apparatus for aiding a determination of a new remote location of said remote positioning apparatus. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A positioning system, comprising:
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a base station for retaining a database for a stored remote location for a remote positioning apparatus and selecting location-determination information according to said stored remote location; a message system manager coupled to the base station for transmitting a base message signal including said selected location-determination information; and said remote positioning apparatus for receiving said base message signal and using said selected location determination information for determining a new remote location. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification