Method for ephemeris assisted global positioning
First Claim
1. A method for transmitting ephemeris assisted location data to a Global Positioning System (GPS) receiver, comprising the steps of:
- a. receiving telemetry word data provided by a non-cellular, land-based network, wherein the telemetry data comprises ephemeris parameters with respect to a location of at least one GPS satellite;
b. computing a location signal using data provided by the non-cellular, land-based network, wherein the location signal is based upon the ephemeris parameters, and the location signal is computed prior to the GPS receiver locking with the at least one GPS satellite; and
c. transmitting the location signal to the GPS receiver via a one-way link, such that the GPS receiver locks with the at least one GPS satellite based upon the location signal, wherein the location signal is transmitted to the GPS receiver via a satellite of an ephemeris assisted location network.
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Accused Products
Abstract
The present invention generally relates to the transmission of GPS reference information, and more particularly, to transmission of GPS ephemeris information for mobile applications. A Telemetry word data is provided by and/or transmitted by a non-cellular, land based network and received by a receiver. A location signal is computed by a processor and transmitted to the GPS receiver. An accumulator accumulates that data and stores it in a data base. The unit may be connected to a Public Safety Answering Point. Also, the present invention provides a method to assist the GPS in mobile applications where the user does not necessarily have a cellular phone. The present invention discloses a method of transmitting ephemeris data to assist the GPS receiver without relying on the cellular telephone network.
34 Citations
36 Claims
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1. A method for transmitting ephemeris assisted location data to a Global Positioning System (GPS) receiver, comprising the steps of:
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a. receiving telemetry word data provided by a non-cellular, land-based network, wherein the telemetry data comprises ephemeris parameters with respect to a location of at least one GPS satellite; b. computing a location signal using data provided by the non-cellular, land-based network, wherein the location signal is based upon the ephemeris parameters, and the location signal is computed prior to the GPS receiver locking with the at least one GPS satellite; and c. transmitting the location signal to the GPS receiver via a one-way link, such that the GPS receiver locks with the at least one GPS satellite based upon the location signal, wherein the location signal is transmitted to the GPS receiver via a satellite of an ephemeris assisted location network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for transmitting ephemeris assisted location data to a Global Positioning System (GPS) receiver, comprising the steps of:
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a. receiving telemetry word data transmitted by a non-cellular, land-based network, wherein the telemetry word data comprises ephemeris parameters with respect to a location of at least one GPS satellite; b. computing a location signal using data provided by a non-cellular, land-based network, wherein the location signal is based upon the ephemeris parameters, and the location signal is computed prior to the GPS receiver locking with the at least one GPS satellite; and c. transmitting the location signal to the GPS receiver via a one-way link comprising a Satellite Digital Audio Radio Service (SDARS) satellite and at least one terrestrial repeater to reduce the Time To First Fix (TTFF), such that the GPS receiver locks with the at least one GPS satellite based upon the location signal. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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26. An apparatus for receiving data, said apparatus comprising:
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a. a receiver adapted to receive data transmitted from a non-cellular, land-based network, wherein the data comprises ephemeris parameters with respect to at least one GPS satellite; b. a processor adapted to perform location computations using the data received from non-cellular, land-based network, wherein the location computation is based upon the ephemeris parameters, and the location computation is performed prior to the GPS receiver locking with the at least one GPS satellite; and c. a GPS receiver that receives the location computations from the processor via a one-way link that comprises a Satellite Digital Audio Radio Service (SDARS) satellite, such that the GPS receiver locks with the at least one GPS satellite based upon the location computation. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification