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 user handset comprising a handset 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 handset clock, and provide the frame synchronization information and associated receive count stamps to the SCU;
wherein the SCU is configured to determine a user handset location based at least in part on the frame synchronization information with its associated receive count stamps, and to provide the user handset location to the user handset.
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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.
68 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 user handset comprising a handset 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 handset clock, and provide the frame synchronization information and associated receive count stamps to the SCU; wherein the SCU is configured to determine a user handset location based at least in part on the frame synchronization information with its associated receive count stamps, and to provide the user handset location to the user handset. - 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 user handset, 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 handset clock; determining a user handset location based at least in part on the frame synchronization information with its associated receive count stamps; and communicating the user handset location to the user handset. - 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 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 user handset, 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 handset clock; means for determining a user handset location based at least in part on the frame synchronization information with its associated receive count stamps; and means for communicating the user handset location to the user handset.
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Specification