Use of received signal strength indicator (RSSI) and global positioning system (GPS) to reduce power consumption in mobile station
First Claim
1. A method for reducing power consumption of a mobile station, comprising:
- combining a plurality of received signal-derived parameters of a cellular system, a position of the mobile station derived from a cellular system positioning function, and a position of the mobile station derived from a satellite-based positioning function to obtain a value that is indicative of a presence or absence of motion of the mobile station;
comparing the value to a motion threshold; and
when an absence of motion is detected, reducing the power consumption of the mobile station by selectively decreasing the usage of mobile station cellular system functions, the cellular system positioning function and the satellite-based positioning function.
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Accused Products
Abstract
Disclosed is mobile station system (5) and a method for operating a mobile station (100) to reduce the power consumption thereof as a function of a presence or absence of motion, and as a function of a duration of a period over which motion above a motion threshold is not detected. The system includes cellular system reception circuitry and circuitry implementing a cellular system positioning function and a satellite-based positioning function (GPS). The circuitry includes a controller (120) that operates in accordance with a stored program for obtaining and combining a plurality of received signal-derived parameters of the cellular system, a position of the mobile station derived from the cellular system positioning function, and a position of the mobile station derived from the satellite-based positioning function to derive a value that is indicative of a presence or absence of motion of the mobile station. The controller compares the value to a motion threshold and, when an absence of motion is detected, the controller is responsive for reducing the power consumption of the mobile station by selectively decreasing the usage of the mobile station cellular system reception circuitry, the cellular system positioning function and the satellite-based positioning function. The received signal-derived parameters of the cellular system include received signal parameters for a currently serving cell and for at least one adjacent cell, and include one or more of a received signal strength indicator (RSSI), a signal to interference ratio (SIR), a received signal code power (RSCP), a block error rate (BLER) and a bit error rate (BER).
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Citations
20 Claims
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1. A method for reducing power consumption of a mobile station, comprising:
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combining a plurality of received signal-derived parameters of a cellular system, a position of the mobile station derived from a cellular system positioning function, and a position of the mobile station derived from a satellite-based positioning function to obtain a value that is indicative of a presence or absence of motion of the mobile station;
comparing the value to a motion threshold; and
when an absence of motion is detected, reducing the power consumption of the mobile station by selectively decreasing the usage of mobile station cellular system functions, the cellular system positioning function and the satellite-based positioning function. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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- 17. A mobile station comprising cellular system reception circuitry and circuitry implementing a cellular system positioning function and a satellite-based positioning function, said circuitry comprising a controller operating in accordance with a stored program for obtaining and combining a plurality of received signal-derived parameters of the cellular system, a position of the mobile station derived from the cellular system positioning function, and a position of the mobile station derived from the satellite-based positioning function to derive a value that is indicative of a presence or absence of motion of the mobile station, for comparing the value to a motion threshold and, when an absence of motion is detected, said controller being responsive for reducing power consumption of the mobile station by selectively decreasing usage of the mobile station cellular system reception circuitry, the cellular system positioning function and the satellite-based positioning function.
Specification