Location specific search for regional satellite vehicles
First Claim
1. A position location method for a wireless device comprising:
- receiving a first signal;
obtaining an identifier indicative of a first location from the first signal;
identifying a regional satellite system servicing a particular geographic region comprising the first location based at least in part on the identifier, wherein the regional satellite system comprises at least one satellite vehicle comprising a geostationary or geosynchronous orbit;
retrieving information associated with the at least one satellite vehicle;
receiving a second signal;
processing the second signal to obtain first satellite signal information for the at least one satellite vehicle; and
determining a position of the wireless device at least partially based on the first satellite signal information.
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Accused Products
Abstract
A position location system, method, and apparatus are disclosed. A wireless device receives a first signal and obtains an identifier indicative of a first location from the first signal. The first signal can be received from a cellular base station and the first identifier can be a mobile country code. The wireless device uses the identifier to determine the availability of signals from a regional satellite system at the first location. If signals from the regional satellite system are available at the first location, the wireless device retrieves information associated with one or more satellite vehicles in the regional satellite system. The information can include pseudo-random number codes and a Doppler search range corresponding to the first location. The wireless device receives a second signal and processes the second signal to obtain first satellite signal information. The wireless device determines its position at least partially based on the first satellite signal information.
20 Citations
41 Claims
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1. A position location method for a wireless device comprising:
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receiving a first signal; obtaining an identifier indicative of a first location from the first signal; identifying a regional satellite system servicing a particular geographic region comprising the first location based at least in part on the identifier, wherein the regional satellite system comprises at least one satellite vehicle comprising a geostationary or geosynchronous orbit; retrieving information associated with the at least one satellite vehicle; receiving a second signal; processing the second signal to obtain first satellite signal information for the at least one satellite vehicle; and determining a position of the wireless device at least partially based on the first satellite signal information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A wireless device comprising:
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a first receiver to receive an information bearing signal having a first identifier indicative of a first location; a second receiver to receive a plurality of satellite signals from a regional satellite system servicing a particular geographic region comprising the first location; and a processor configured to; obtain the first identifier from the information bearing signal and use the first identifier to retrieve second identifiers from a memory of the wireless device; identify the regional satellite system based at least in part on the first identifier; process at least one of the plurality of satellite signals using second identifiers; and determine a position of the wireless device using information from the plurality of satellite signals. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A position location method for a mobile device comprising:
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maintaining information associated with satellite vehicles of regional satellite systems in a memory of the mobile device, at least one of the satellite vehicles of the regional satellite systems having a geostationary or geosynchronous orbit; receiving a terrestrial signal from a cellular base station; obtaining an identifier indicative of a first location from the terrestrial signal; identifying a first regional satellite system servicing a particular geographic region comprising the first location based at least in part on the identifier, determining an availability of the first regional satellite system at the first location using the identifier; retrieving from the memory a pseudo-random number code corresponding to a first satellite vehicle of the first regional satellite system if the first regional satellite system is available at the first location; receiving a second signal; processing the second signal using the pseudo-random number code to obtain first satellite signal information; and determining a position of the mobile device at least partially based on the first satellite signal information. - View Dependent Claims (35, 36, 37, 38, 39)
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40. A non-transitory computer-readable medium encoded with one or more instructions for locating the position of a wireless device, the one or more instructions including instructions which are executable by one or more processors to:
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obtain an identifier indicative of a first location from a first received signal; identify a regional satellite system servicing a particular geographic region comprising the first location based at least in part on the identifier, wherein the regional satellite system comprises at least one satellite vehicle comprising a geostationary or geosynchronous orbit; retrieve information associated with the at least one satellite vehicle; process a second received signal to obtain first satellite signal information for the at least one satellite vehicle; and determine a position of the wireless device at least partially based on the first satellite signal information.
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41. A wireless device comprising:
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means for receiving an information bearing signal having a first identifier indicative of a first location; means for identifying a regional satellite system servicing a particular geographic region comprising the first location based at least in part on the identifier, wherein the regional satellite system comprises at least one satellite vehicle comprising a geostationary or geosynchronous orbit; means for receiving a plurality of satellite signals and determining a position of the wireless device using information from the satellite signals, wherein at least one of the plurality of satellite signals is received using second identifiers for satellite vehicles that are part of the regional satellite system; and means for obtaining the first identifier from the information bearing signal and using the first identifier to retrieve the second identifiers from a storage means of the wireless device.
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Specification