# US 7,609,203 B2 · Method for ephemeris assisted global positioning > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,609,203 B2 - Document ID: US7609203B2 - Status: Granted - Kind: B2 - Application number: 11/300,220 - Filed: 2005-12-14 - Published: 2007-06-14 - Granted: 2009-10-27 - Earliest claimed: 2005-12-14 - Assignees: Delphi Technologies, Inc. - Inventors: Joseph R. Dockemeyer, Jr.; Larry J. Fruit - Web page: https://patentgrep.com/patent/US7609203B2 ## CPC - G01S 19/05: providing aiding data - G01S 19/06: employing an initial estimate of the location of the receiver as aiding data or in generating aiding data - G01S 19/07: providing data for correcting measured positioning data, e.g. DGPS [differential GPS] or ionosphere corrections - G01S 19/09: providing processing capability normally carried out by the receiver - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES ## 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. ## Claims ### 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. ### Claim 2 (depends on 1) The method of claim 1 further comprising the step of: a. accumulating data provided by the non-cellular, land-based network. ### Claim 3 (depends on 1) The method of claim 1 further comprising the step of: a. storing data provided by the non-cellular, land-based network. ### Claim 4 (depends on 1) The method of claim 1 further comprising the steps of: a. receiving data provided by a GPS Reference Station; b. accumulating GPS Reference Station data received; c. storing GPS Reference Station data; and d. performing location computations using data received including GPS Reference Station data. ### Claim 5 (depends on 1) The method of claim 1 further comprising the steps of: a. receiving mobile location data provided by the GPS receiver; b. accumulating mobile location data received; c. storing mobile location data; and d. performing location computations using data received including mobile location data. ### Claim 6 (depends on 1) The method of claim 1 wherein the location signal is transmitted to the GPS receiver via radio delivery service (RDS). ### Claim 7 (depends on 1) The method of claim 1 wherein the location signal is transmitted to the GPS receiver via in band on channel (IBOC) on AM and FM radio stations. ### Claim 8 (depends on 1) The method of claim 1 wherein the location signal is transmitted to the GPS receiver via Industrial, Scientific, and Medical (ISM) radio bands. ### Claim 9 (depends on 1) The method of claim 1 wherein the location signal is transmitted to the GPS receiver via IEEE 802.11 protocol. ### Claim 10 (depends on 1) The method of claim 1 wherein the location signal is transmitted to the GPS receiver via short-range wireless communication technology. ### Claim 11 (depends on 1) The method of claim 1 wherein the location signal is transmitted to the GPS receiver via a mobile data service. ### Claim 12 (depends on 1) The method of claim 1 wherein the location signal is transmitted to the GPS receiver via a satellite wherein the satellite is a Satellite Digital Audio Radio Service (SDARS) satellite. ### Claim 13 (depends on 1) The method of claim 1, wherein the transmitting of the location signal to the GPS receiver reduces the Time To First Fix (TTFF) of the GPS receiver locking to the at least one satellite. ### Claim 14 (depends on 13) The method of claim 13, wherein the TTFF is seconds. ### Claim 15 (depends on 1) The method of claim 1, wherein the computed location signal is not an error correcting location signal that is utilized after the GPS receiver locks with the at least one GPS satellite. ### Claim 16 (depends on 1) The method of claim 1, wherein the data provided by the non-cellular, land-based network comprises almanac data that is used for the computation of the location signal, such that a time period prior to computation of the location signal is reduced. ### Claim 17 (depends on 12) The method of claim 12, wherein the SDARS comprises at least one terrestrial repeater in one-way communication with the GPS receiver. ### Claim 18 A method for transmitting ephemeris assisted location data to a Global Positioning System (GPS) receiver, comprising the steps of: 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. ### Claim 19 (depends on 18) The method of claim 18 further comprising the step of: a. accumulating data transmitted by the non-cellular, land-based network. ### Claim 20 (depends on 18) The method of claim 18 further comprising the step of: a. storing data transmitted by the non-cellular, land-based network. ### Claim 21 (depends on 18) The method of claim 18 further comprising the steps of: a. receiving data transmitted by a GPS Reference Station; b. accumulating GPS Reference Station data received; c. storing GPS Reference Station data; and d. performing location computations using data received including GPS Reference Station data. ### Claim 22 (depends on 18) The method of claim 18 further comprising the steps of: a. receiving mobile location data transmitted by the GPS receiver; b. accumulating mobile location data received; c. storing mobile location data; and d. performing location computations using data received including mobile location data. ### Claim 23 (depends on 18) The method of claim 18, wherein the TTFF is seconds. ### Claim 24 (depends on 18) The method of claim 18, wherein the computed location signal is not an error correcting location signal that is utilized after the GPS receiver locks with the at least one GPS satellite. ### Claim 25 (depends on 18) The method of claim 18, wherein the data provided by the non-cellular, land-based network comprises almanac data that is used for the computation of the location signal, such that a time period prior to computation of the location signal is reduced. ### Claim 26 An apparatus for receiving data, said apparatus comprising: 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. ### Claim 27 (depends on 26) The apparatus of claim 26 further comprising: a. an accumulator adapted to accumulate data received from the non-cellular, land-based network. ### Claim 28 (depends on 26) The apparatus of claim 26 further comprising: a. a database adapted to store data received from the non-cellular, land-based network. ### Claim 29 (depends on 26) The apparatus of claim 26 further comprising: a. a digital transmission receiver adapted to receive data from a GPS Reference Station; b. an accumulator adapted to accumulate GPS Reference Station data; c. a database adapted to store GPS Reference Station Data; and d. a processor adapted to perform location computations using GPS Reference Station data received. ### Claim 30 (depends on 26) The apparatus of claim 26 further comprising: a. a digital transmission receiver adapted to receive mobile location data from a GPS receiver; b. an accumulator adapted to accumulate mobile location information; c. a database adapted to store mobile location information; and d. a processor adapted to perform location computations using mobile location data received. ### Claim 31 (depends on 26) The apparatus of claim 26 further comprising means for connecting to a Public Safety Answering Point (PSAP). ### Claim 32 (depends on 29) The apparatus of claim 29, wherein the SDARS comprises at least one terrestrial repeater in one-way communication with the GPS receiver. ### Claim 33 (depends on 26) The apparatus of claim 26, wherein the location computations received by the GPS receiver reduces the TTFF. ### Claim 34 (depends on 26) The apparatus of claim 26, wherein the computed location signal is not an error correcting location signal that is utilized after the GPS receiver locks with the at least one GPS satellite. ### Claim 35 (depends on 26) The method of claim 26, wherein the data received from the non-cellular, land-based network comprises almanac data that is used for the computation of the location signal, such that a time period between the receiver being turned on and the computation of the location signal is reduced. ### Claim 36 (depends on 26) The apparatus of claim 26, wherein the TTFF is seconds.