Power cycling for a global positioning system
First Claim
1. A global positioning system (GPS) assembly, comprising:
- a power management component that operates to switch a GPS receiver between at least a first mode, in which the receiver is actively receiving almanac and positioning data, and a second mode, in which the receiver does not actively receive data according to a power cycling routine of the receiver;
a memory that stores a plurality of quanta of almanac data as associated memory blocks, each memory block having an associated status indicating the length of time for which the associated almanac data is expected to be useful;
a signal processing component that processes a received signal containing at least a portion of a quantum of almanac data and identifies the quantum of almanac data within the received signal; and
a receiver control that adjusts the power cycling routine of the GPS receiver according to the associated status of a memory block associated with the identified quantum of almanac data.
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Accused Products
Abstract
Methods and systems are presented for controlling power cycling in a global positioning system (GPS) assembly. The assembly comprises a power management component that operates to switch a GPS receiver between at least a first mode, in which the receiver is actively receiving almanac and positioning data, and a second mode, in which the receiver does not actively receive data according to a power cycling routine of the receiver. A memory stores a plurality of quanta of almanac data as associated memory blocks, each memory block having an associated status indicating the length of time for which the associated almanac data is expected to be useful. A signal processing component processes a received signal containing at least a portion of a quantum of almanac data and identifies the quantum of almanac data within the received signal. A receiver control adjusts the power cycling routine of the GPS receiver according to the associated status of a memory block associated with the identified quantum of almanac data.
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Citations
22 Claims
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1. A global positioning system (GPS) assembly, comprising:
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a power management component that operates to switch a GPS receiver between at least a first mode, in which the receiver is actively receiving almanac and positioning data, and a second mode, in which the receiver does not actively receive data according to a power cycling routine of the receiver;
a memory that stores a plurality of quanta of almanac data as associated memory blocks, each memory block having an associated status indicating the length of time for which the associated almanac data is expected to be useful;
a signal processing component that processes a received signal containing at least a portion of a quantum of almanac data and identifies the quantum of almanac data within the received signal; and
a receiver control that adjusts the power cycling routine of the GPS receiver according to the associated status of a memory block associated with the identified quantum of almanac data. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of conserving power in a handheld global positioning system (GPS) locator device comprising:
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activating a GPS receiver to obtain a position fix for an associated device according to a predefined power cycling routine;
receiving a portion of a subframe of almanac data for the GPS receiver while the GPS receiver is active;
identifying at least one block of stored almanac data associated with the received portion of a subframe; and
adjusting the power cycling routine of the GPS receiver according to an associated status of the identified block of stored almanac data, the status indicating the length of time for which the block of almanac data is expected to be useful. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A handheld communications system, comprising:
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a radio frequency (RF) transceiver operative to communicate with other handheld communication systems through a mobile base station; and
a memory that stores a plurality of quanta of almanac data as associated memory blocks, each memory block having an associated status indicating the length of time for which the associated almanac data is expected to be useful, the mobile base station periodically providing updates to the associated memory blocks via an RF transmission. - View Dependent Claims (15, 16, 17, 18)
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19. A method of conserving power in a handheld communications system that comprises a global positioning system (GPS) receiver, comprising:
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activating an associated receiver according to a predefined power cycling routine to receive desired data from a mobile base station;
receiving at least a portion of a quantum of almanac data along with the desired data during communication with the mobile base station;
identifying at least one block of stored almanac data associated with the received at least a portion of a quantum; and
adjusting the power cycling routine of the receiver according to an associated status of the identified block of stored almanac data, the status indicating the length of time for which the block of almanac data is expected to be useful. - View Dependent Claims (20, 21, 22)
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Specification