Systems and methods for locating a mobile device within a cellular system
First Claim
1. A system for determining location and timing information in a cellular network having a plurality of cell sites, the system comprising:
- a space-time calibration unit (SCU);
a plurality of nodes in communication with the SCU, each node comprising a node ping driver configured to receive frame synchronization information from a respective subset of cell sites, associate the frame synchronization information with respective receive count stamps generated using a local node clock, and provide the frame synchronization information and associated receive count stamps to the SCU; and
a cellular device comprising a ping driver configured to receive the frame synchronization information from a serving cell site and one or more neighbor cell sites, associate the frame synchronization information with respective receive count stamps generated using a local clock, and provide the frame synchronization information and associated receive count stamps to the SCU;
wherein the SCU is configured to determine a location of the cellular device based at least in part on the frame synchronization information with its associated receive count stamps obtained from the node ping drivers and ping driver, and to provide the location to the cellular device.
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Accused Products
Abstract
A system for determining location and timing information in a cellular network includes a space-time calibration unit (SCU) and a plurality of nodes in communication with the SCU. Each node includes a node ping driver that receives frame synchronization information from a respective subset of cell sites, and associates the frame synchronization information with respective receive count stamps generated using a local node clock. The system also includes a user handset that includes a handset ping driver that receives the frame synchronization information from a serving cell site and one or more neighbor cell sites, and associates the frame synchronization information with respective receive count stamps generated using a local handset clock. The SCU uses the information from the node and handset ping drivers to determine a handset location.
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Citations
16 Claims
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1. A system for determining location and timing information in a cellular network having a plurality of cell sites, the system comprising:
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a space-time calibration unit (SCU); a plurality of nodes in communication with the SCU, each node comprising a node ping driver configured to receive frame synchronization information from a respective subset of cell sites, associate the frame synchronization information with respective receive count stamps generated using a local node clock, and provide the frame synchronization information and associated receive count stamps to the SCU; and a cellular device comprising a ping driver configured to receive the frame synchronization information from a serving cell site and one or more neighbor cell sites, associate the frame synchronization information with respective receive count stamps generated using a local clock, and provide the frame synchronization information and associated receive count stamps to the SCU; wherein the SCU is configured to determine a location of the cellular device based at least in part on the frame synchronization information with its associated receive count stamps obtained from the node ping drivers and ping driver, and to provide the location to the cellular device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for determining location and timing information in a cellular network having a plurality of cell sites, the method comprising:
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receiving, at a plurality of nodes, frame synchronization information from respective subsets of cell sites and associating the frame synchronization information with respective receive count stamps generated using local node clocks; receiving, at a cellular device, the frame synchronization information from a serving cell site and one or more neighbor cell sites and associating the frame synchronization information with respective receive count stamps generated using a local clock in the cellular device; determining a location of the cellular device based at least in part on the frame synchronization information with its associated receive count stamps obtained from the plurality of nodes and the cellular device; and communicating the location of the cellular device to the cellular device. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A system for determining location and timing information in a cellular network having a plurality of cell sites, the system comprising:
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means for receiving, at each of a plurality of nodes, frame synchronization information from respective subsets of cell sites and associating the frame synchronization information with respective receive count stamps generated using local node clocks; means for receiving, at a cellular device, the frame synchronization information from a serving cell site and one or more neighbor cell sites and associating the frame synchronization information with respective receive count stamps generated using a local clock; means for determining a location of the cellular device based at least in part on the frame synchronization information with its associated receive count stamps obtained from the plurality of nodes and the cellular device; and means for communicating the location of the cellular device to the cellular device.
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Specification