System and method for providing aided GPS positioning via satellite digital radio system

• US 7,719,464 B2
• Filed: 10/30/2006
• Issued: 05/18/2010
• Est. Priority Date: 10/28/2005
• Status: Expired due to Fees

• Current Assignee: CSR Technology Incorporated (Qualcomm, Inc.)
• Original Assignee: SIRF Technology Incorporated (Qualcomm, Inc.)
• Inventors: Chang, Steve, Pande, Ashutosh, Boeryd, Lars
• Primary Examiner(s): Tarcza; Thomas H
• Assistant Examiner(s): Mull; Fred H
• Application Number:
  US11/589,668
• Publication Number:
  US 20070103365A1
• Time in Patent Office: 1,296 Days
• Field of Search: 342/357.09, 342/357.1, 342/357.15
• US Class Current: 342/357.31
• CPC Class Codes: G01S 19/05 providing aiding data
• CPC Class Codes: G01S 19/37 Hardware or software details of the signal processing chain

Abstract

A system and method for providing aiding information to a satellite positioning system (“SPS”) receiver. A digital satellite radio system satellite receives aiding information communicated from a positioning system. The digital satellite radio system broadcasts the aiding information in the data signals it broadcasts to its subscribers. The subscribers receive the aiding information at satellite radio receivers and communicate the aiding information to the SPS receiver. The data signals may also be communicated to terrestrial repeaters for re-broadcast at a higher power. The terrestrial repeaters may input a transmitter identifier to permit the satellite radio receiver to determine a geographical location of the terrestrial repeater as its own.

Claims

1. A method for providing aiding information to a satellite positioning system (“

SPS”

) receiver comprising;

receiving a first broadcasting data signal from a data service satellite;

extracting aiding information contained in the first broadcasting data signal, wherein the aiding information was provided to the data service satellite from an aiding satellite positioning system server, and wherein the first broadcasting data signal was generated by combining the aiding information with broadcasting data by a data combiner located at the data service satellite;

sending the aiding information to the SPS receiver to aid the SPS receiver in obtaining its location from the satellite positioning system;

receiving a second broadcasting data signal from a terrestrial repeater;

receiving a transmitter identifier contained in the second broadcasting data signal; and

searching for a repeater location corresponding to the transmitter identifier.

2. The method of claim 1 further comprising:

sending the repeater location to the SPS receiver to set a current location of the SPS receiver.

3. The method of claim 1 further comprising:

receiving a broadcast data signal;

determining whether the broadcasting data signal was transmitted by the data service satellite or by the terrestrial repeater;

processing the broadcast data signal as the first broadcasting data signal if when received from the data service satellite; and

processing the broadcast data signal as the second broadcasting data signal if when received from the terrestrial repeater.

4. The method of claim 3 further comprising:

when the broadcast data signal is the first broadcasting data signal, retrieving a current location from a last received broadcast data signal from the terrestrial repeater; and

sending the current location to the SPS receiver.

5. The method of claim 1 further comprising:

receiving a second broadcasting data signal from a terrestrial repeater; and

extracting a repeater location contained in the second broadcasting signal.

6. A method for providing aiding information to a satellite positioning system (“

SPS”

) receiver comprising;

receiving aiding information at a data service satellite over an uplink connection to an aiding satellite positioning system server;

combining, by a data combiner located at the data service satellite, the aiding information with data into a data signal, the data having subscription-based content for communication to a subscriber at a receiver terminal, wherein combining the aiding information by the data combiner includes;

receiving the aiding information in at least one data packet, and

directing the data packet containing the aiding information to a downlink interface for transmission with data packets containing data; and

continuously broadcasting the data signal to the receiver terminal, wherein the data signal is processed to obtain the aiding information to provide to the SPS receiver.

7. The method of claim 6, comprising:

maintaining the packets containing the aiding information in a format that is the same as the format as received from the aiding satellite positioning system server; and

directing to the downlink interface for transmission with the data packets containing data either in a first stream of packets to the receiver terminal, or a second stream of packets to a terrestrial repeater.

8. The method of claim 6, comprising including the aiding information in the payload of the data packet containing data.

9. A system for providing aiding information to a satellite positioning system (“

SPS”

) receiver comprising;

a data service satellite configured to broadcast data and aiding information to a data service receiver;

a data combiner located at the data service satellite to combine the aiding information and the data into a data signal for broadcasting, wherein the aiding information and the data are combined at the data service satellite by the data combiner;

an SPS receiver interface operating in the data service receiver to retrieve the aiding information from the broadcast data signal and to communicate the aiding information to the SPS receiver;

wherein the data service satellite is a digital radio satellite, the data service receiver is a satellite radio receiver, and the data comprises radio programming;

a terrestrial repeater operable to receive the data signals from the data service satellite and to input a transmitter identifier identifying the terrestrial repeater in the data signals, the terrestrial repeater being further operable to broadcast the data signals to the data service receiver.

10. The system of claim 9 wherein the data service receiver receives broadcast data signals and determines if the broadcast data signal is from the terrestrial repeater or from the data service satellite, the data service receiver being further operable to extract a transmitter identifier from the data signal if the signal was received from the terrestrial repeater and use the transmitter identifier to obtain a repeater location.

11. The system of 9 wherein the data service receiver receives broadcast data signals and determines if the broadcast data signal is from the terrestrial repeater or from the data service satellite, the data service receiver being further operable to extract a repeater location from the data signal if the signal was received from the terrestrial repeater.

12. A data service receiver in a satellite data service system comprising:

a satellite communications interface to receive data signals broadcast by a data service satellite, the data signals including data associated with the data service satellite combined with aiding information, wherein the data signals were generated by combining the data associated with the data service satellite with the aiding information by a combiner located at the data service satellite;

a satellite positioning system interface to extract the aiding information from the data signals; and

a satellite positioning system (“

SPS”

) receiver interface to communicate the aiding information to the SPS receiver;

wherein the data service receiver is operable to determine if the broadcast data signal is from a terrestrial repeater or from the data service satellite, the data service receiver being further operable to extract a transmitter identifier from the data signal if the signal was received from the terrestrial repeater and use the transmitter identifier to obtain a repeater location.

13. The data service receiver of claim 12 further comprising a data storage element to store the repeater location corresponding to the transmitter identifier.

14. The data service receiver of claim 13 wherein the data storage element includes a database containing at least one transmitter identifier and the repeater location corresponding to the transmitter identifier.

15. A data service satellite for providing broadcast data signals to a data service receiver, the data service satellite comprising:

an uplink interface to an aiding satellite positioning system server to receive aiding information;

a data combiner located at the data service satellite to combine the aiding information with data associated with the data service satellite to be transmitted in the broadcast data signals, wherein the aiding information is combined with the data associated with the data service satellite at the data service satellite by the data combiner; and

a downlink interface to the data service receiver to transmit the broadcast data signals having the data and the aiding information;

wherein the data service satellite provides satellite radio programming and the data service receiver is a satellite radio receiver; and

wherein the uplink interface receives the aiding information in data packets, the data combiner being operable to direct the data packets containing the aiding information to the downlink interface for transmission with data packets containing the data.

16. A satellite radio receiver in a digital satellite radio system comprising:

means for receiving a first broadcasting data signal from a data service satellite;

means for extracting aiding information contained in the first broadcasting data signal, wherein the aiding information was provided to the data service satellite from an aiding satellite positioning system server, and wherein the aiding information was combined at the data service satellite with broadcasting data by a means for combining data located at the data service satellite to generate the first broadcasting data signal;

means for sending the aiding information to the satellite positioning system (“

SPS”

) receiver, to aid the SPS receiver in obtaining its location from the satellite positioning system;

means for receiving a second broadcasting data signal from a terrestrial repeater,

means for receiving a transmitter identifier contained in the second broadcasting data signal; and

means for searching for a repeater location corresponding to the transmitter identifier.

17. The system of claim 16 further comprising means for sending the repeater location to the SPS receiver to set a current location of the SPS receiver.

18. The system of claim 16 further comprising:

means for receiving a broadcast data signal;

means for determining whether the broadcasting data signal was transmitted by the digital radio satellite or by the terrestrial repeater;

means for processing the broadcast data signal as the first broadcasting data signal if received from the digital radio satellite; and

means for processing the broadcast data signal as the second broadcasting data signal if received from the terrestrial repeater.

19. The system of claim 18 further comprising:

when the broadcast data signal is the first broadcasting data signal, means for retrieving a current location from a last received broadcast data signal from the terrestrial repeater; and

means for sending the current location to the SPS receiver.

20. The system of claim 16 further comprising:

means for receiving a second broadcasting data signal from a terrestrial repeater;

means for extracting a repeater location contained in the second broadcasting signal.

21. A system for providing aiding information to a satellite positioning system (“

SPS”

) receiver comprising;

means for receiving aiding information at a data service satellite over an uplink connection to an aiding satellite positioning system server;

means for combining located at the data service satellite, wherein the means for combining is for combining the aiding information with data into a data signal at the data service satellite, the data having subscription-based content for communication to a subscriber at a receiver terminal wherein the means for combining the aiding information includes;

means for receiving the aiding information in at least one data packet, and

means for directing the data packet containing the aiding information to the downlink interface transmission with data packets containing data; and

means for continuously broadcasting the data signal to the receiver terminal, wherein the data signal is processed to obtain the aiding information to provide to the SPS receiver.