US2002184653A1PendingUtilityA1

Services based on position location using broadcast digital television signals

35
Priority: Feb 2, 2001Filed: Apr 12, 2002Published: Dec 5, 2002
Est. expiryFeb 2, 2021(expired)· nominal 20-yr term from priority
Inventors:Matthew Dalton PierceMatthew Rabinowitz
G01S 5/02216G01S 5/0218A63F 2300/205H04N 21/8126G01S 5/0036H04N 21/2668G01C 21/206H04N 21/41422G01S 5/14G01S 5/145G01S 5/021H04N 21/25841G01S 5/0054H04N 21/2662H04N 21/615G01S 5/0081G01S 19/46
35
PatentIndex Score
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References
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Claims

Abstract

A service depends on the location of a device. The device location is determined using DTV signals. More specifically, the device location is determined based on pseudo-ranges between the device and a plurality of digital television (DTV) transmitters and the pseudo-ranges are determined based on broadcast DTV signals received by the device from the DTV transmitters. Examples of DTV signals include the American Television Standards Committee (ATSC) signals, the European Telecommunications Standards Institute Digital Video Broadcasting-Terrestrial (DVB-T) signals and the Japanese Integrated Service Digital Broadcasting-Terrestrial (ISDB-T) signals.

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
         1 . A method for providing a navigation service, the method comprising: 
 accessing a location of a device, the location determined from pseudo-ranges between the device and a plurality of digital television (DTV) transmitters, the pseudo-ranges calculated from broadcast DTV signals received by the device from the DTV transmitters; and    providing navigation information according to the location of the device.    
     
     
         2 . The method of  claim 1 , wherein the navigation information comprises a map of a local vicinity around the device.  
     
     
         3 . The method of  claim 1 , wherein the navigation information comprises directions between the location of the device and a second location.  
     
     
         4 . The method of  claim 3 , wherein the second location is determined by a user of the device.  
     
     
         5 . The method of  claim 1 , wherein the navigation information comprises directions between the location of the device and a location of a second device, wherein the location of the second device is determined from pseudo-ranges between the second device and a plurality of DTV transmitters, the pseudo-ranges calculated from broadcast DTV signals received by the second device from the DTV transmitters.  
     
     
         6 . The method of  claim 1 , further comprising: 
 periodically accessing an updated location of the device; and    periodically providing updated navigation information according to the updated location.    
     
     
         7 . The method of  claim 1 , wherein providing navigation information comprises: 
 the device providing the navigation information.    
     
     
         8 . The method of  claim 1 , wherein accessing the location of the device comprises: 
 receiving the location from a DTV location server.    
     
     
         9 . The method of  claim 1 , wherein providing navigation information comprises: 
 a service provider system retrieving the navigation information according to the location of the device; and    the service provider system transmitting the navigation information to the device.    
     
     
         10 . The method of  claim 1 , wherein providing navigation information comprises: 
 a service provider system determining a key code for navigation information according to the location of the device, the key code enabling retrieval of the navigation information; and    the service provider system transmitting the key code to the device.    
     
     
         11 . The method of  claim 1  wherein the DTV signals are American Television Standards Committee (ATSC) signals.  
     
     
         12 . The method of  claim 1  wherein the DTV signals are European Telecommunications Standards Institute Digital Video Broadcasting-Terrestrial (DVB-T) signals.  
     
     
         13 . An apparatus for providing a navigation service, comprising: 
 means for accessing a location of a device, the location determined from pseudo-ranges between the device and a plurality of DTV transmitters, the pseudo-ranges calculated from broadcast DTV signals received by the device from the DTV transmitters; and    means for providing navigation information according to the location of the device.    
     
     
         14 . The apparatus of  claim 13 , wherein the navigation information comprises a map of a local vicinity around the device.  
     
     
         15 . The apparatus of  claim 13 , wherein the navigation information comprises directions between the location of the device and a second location.  
     
     
         16 . The apparatus of  claim 15 , wherein the second location is determined by a user of the device.  
     
     
         17 . The apparatus of  claim 13 , further comprising: 
 means for periodically accessing an updated location of the device; and    means for periodically providing updated navigation information according to the updated location.    
     
     
         18 . The apparatus of  claim 13  wherein the DTV signals are American Television Standards Committee (ATSC) signals.  
     
     
         19 . The apparatus of  claim 13  wherein the DTV signals are European Telecommunications Standards Institute Digital Video Broadcasting-Terrestrial (DVB-T) signals.  
     
     
         20 . The apparatus of  claim 13  wherein the DTV signals are Japanese Integrated Service Digital Broadcasting-Terrestrial (ISDB-T) signals.  
     
     
         21 . The apparatus of  claim 13  wherein the device is positioned on a vehicle.  
     
     
         22 . The apparatus of  claim 21  wherein the vehicle is an automobile or a truck.  
     
     
         23 . The apparatus of  claim 13  wherein the device is positioned on a mobile electronic device.  
     
     
         24 . The apparatus of  claim 23  wherein the mobile electronic device is a mobile phone.  
     
     
         25 . The apparatus of  claim 23  wherein the mobile electronic device is a personal digital assistant.  
     
     
         26 . A computer software product, comprising instructions stored on a computer readable medium, to effect a method comprising: 
 accessing a location of the device, the location determined from pseudo-ranges between the device and a plurality of DTV transmitters, the pseudo-ranges calculated from broadcast DTV signals received by the device from the DTV transmitters; and    providing navigation information according to the location of the device.    
     
     
         27 . The computer software product of  claim 26 , wherein the navigation information comprises a map of a local vicinity around the device.  
     
     
         28 . The computer software product of  claim 26 , wherein the navigation information comprises directions between the location of the device and a second location.  
     
     
         29 . The computer software product of  claim 28 , wherein the second location is determined by a user of the device.  
     
     
         30 . The computer software product of  claim 25 , the effected method further comprising: 
 periodically accessing an updated location of the device; and    periodically providing updated navigation information according to the updated location.    
     
     
         31 . A system for providing a navigation service based on a location of a device, the system comprising: 
 a device for receiving broadcast DTV signals from a plurality of DTV transmitters;    a DTV location server for determining a location of the device from pseudo-ranges between the device and the DTV transmitters, the pseudo-ranges calculated from the received DTV signals; and    a service provider system for providing navigation information according to the location of the device.    
     
     
         32 . The system of  claim 31  wherein the device serves as the service provider system by providing the navigation information.  
     
     
         33 . The system of  claim 31  wherein: 
 the device serves as the DTV location server by determining the location from the pseudo-ranges; and  
 the device serves as the service provider system by providing the navigation information.  
 
     
     
         34 . The system of  claim 31  wherein: 
 the device serves as the DTV location server by determining the location from the pseudo-ranges.

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