WO2005085894A1 - Layered host based satellite positioning system and method - Google Patents
Layered host based satellite positioning system and method Download PDFInfo
- Publication number
- WO2005085894A1 WO2005085894A1 PCT/US2004/003534 US2004003534W WO2005085894A1 WO 2005085894 A1 WO2005085894 A1 WO 2005085894A1 US 2004003534 W US2004003534 W US 2004003534W WO 2005085894 A1 WO2005085894 A1 WO 2005085894A1
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- WIPO (PCT)
- Prior art keywords
- location data
- tracker
- interface
- formatted
- data
- Prior art date
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/03—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers
- G01S19/09—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing processing capability normally carried out by the receiver
-
- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/35—Constructional details or hardware or software details of the signal processing chain
- G01S19/37—Hardware or software details of the signal processing chain
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/52—Network services specially adapted for the location of the user terminal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/18—Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
-
- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/0009—Transmission of position information to remote stations
- G01S5/0018—Transmission from mobile station to base station
- G01S5/0036—Transmission from mobile station to base station of measured values, i.e. measurement on mobile and position calculation on base station
Definitions
- This invention relates to global positioning systems.
- this invention relates to global positioning systems implemented using the processing power of a host in layered communication with tracker hardware.
- SPS satellite positioning systems
- GPS Global Positioning System
- PDAs Personal Digital Assistants
- GPS solutions are often developed or customized for specific devices and applications. Such customization increases the complexity of implementing GPS systems on numerous platforms and operating systems. Further, known GPS systems are often not able to take advantage of changes in software and hardware without changing a large portion of the software in a GPS device. The customized or specific device design approach also limits the ability to create application program interfaces that can be marketed and delivered separate from the GPS hardware.
- the SPS is a GPS solution implemented in a layered form that is flexible and extensible, and that can adapted to meet he needs of many different platforms.
- a wide variety of electronic devices may incorporate GPS functionality with less expense using less development time.
- a host based positioning system includes host computer system that connects through a tracker hardware interface to a dedicated hardware space vehicle tracker.
- the host processing system also uses a layered approach having a user application layer, communication processing layer, client-server interface processing layer, user manager and protocol layer, navigation processing layer, and tracker interface layer.
- a processor in the host processing system runs the positioning engine and the functions provided by the different layers.
- the tracker hardware interface receives positioning information from the space vehicle tracker (tracker hardware). Through functions in the tracker interface, "the location data is communicated to the host computer.
- Figure 1 is a diagram of an exemplar positioning systems implemented as a layered host computer based GPS solution having tracker hardware in communication with a host.
- Figure 2 is a block diagram of the exemplar position system of figure 1.
- Figure 3 illustrates the tracker hardware of Figure 2.
- Figure 4 depicts a host-based navigation module located in the host computer of figure 2 in communication with a plurality of user applications.
- Figure 5 is a graphical representation of an application program interface between a user application located on the host computer and the tracker hardware of figure 2.
- Figure 6 is graphical representation of the different layers involved with a user application on the host computer communicating with tracker hardware of figure 5.
- Figure 7 is a block diagram of a data forwarder in the client server interface- processing layer of figure 6.
- Figure 8 is a flowchart of the process for the user application 218 to communicate with the tracker hardware 102 of Figure 6.
- FIG 1 a diagram of an exemplar positioning systems 100 implemented as a layered host based satellite positioning system with a GPS solution having tracker hardware 102 in communication with a host computer 104 is shown.
- the tracker hardware 102 is connected to a GPS antenna 106 capable of receiving multiple GPS signals 108 from a plurality of satellites.
- the tracker hardware 102 is also depicted as being connected to a DC power supply 110.
- the tracker hardware 102 communicates with the host computer 104 over a hardware tracker interface link 112.
- Examples of the hardware tracker interface link 112 includes, " but are not limited to; a serial connection (including a universal serial bus (USB), a small conrputer serial interface (SCSI)), a parallel connection, and a wireless connection (including RF connections and infrared connections).
- a serial connection including a universal serial bus (USB), a small conrputer serial interface (SCSI)
- SCSI small conrputer serial interface
- parallel connection including a parallel connection
- a wireless connection including RF connections and infrared connections.
- the tracker hardware 102 may be receive power from the DC power supply 110 that is separate from the power supply of the host computer 104, or in an alternate embodiment may receive power from the host computer 104 via the hardware tracker interface link 11 .2. Further, the GPS antenna 106 may be separate from the tracker hardware 102 or integrated- within the same housing as the tracker hardware 102.
- the computer host 104 includes a central processing unit (CPU) 202, a hardware tracker interface link 112, and a memory 208.
- the CPU 202 is a controller and may be implemented as a microprocessor, embedded controller, application specific integrated circuit (-ASIC), discrete logic circuits acting as a controller, analog circuits acting as a controller, and a combination of discrete logic and analog circuits.
- the host computer 104 also includes a secondary storage device 210, and a display 212, and an input interface 214 (e.g., a mouse, keyboard, and the like).
- An operating system 216 e.g., Windows CE, Palm OS, UNIX, QNX, or the like
- a plurality of user applications 218 communicates with a positioning library 220 and he operating system 216.
- One of the user applications 218 may receive position information from the position ng library, and may also communicate commands to the positioning library.
- the user application 218 may be virtually any program that uses positioning information, including, as examples, a mapping program, course charter, location aid, and the like.
- the host computer 104 connects through the hardware tracker interface 214 and the interface connection 112 to the tracker hardware 102.
- the hardware tracker interface 214 may be virtually any type of data transfer interface (as examples, a serial, parallel, PCMCIA card, USB, PC Card, or network interface).
- the hardware track: er interface 214 is an RS232 port running at 38,400 bps, N-8-1 that communicates up to 2KB of data per second between the tracker hardware 102 and the computer host 104.
- the tracker hardware (as illustrated by the reference numeral 222) is more closely incorporated into the host computer 104. Trrus, rather than connecting to the computer host 104 through the interface connection link 112, for example, the tracker hardware 222 may be directly coupled to the host computer 104 adclress, data, and control buses 224. As will be explained in more detail below, the host computer 104 receives and processes navigation information from the hardware tracker 102, or in an alternate embodiment 222 in order to provide the plurality of user applications 218 with position information.
- the tracker hardware 102 of Figure 2 acquires and tracks GPS satellites and sends raw measurement data to the host computer 104 for position calculation.
- the tracker hardware 102 includes an antenna 106 for receiving GPS satellite signals 108 that are filtered by a radio frequency (RF) filter 304 for passing the signals to the RF interface circuit 302.
- the RF interface circuit 302 processes the signals, produces 2-bit Inphase and Quadrature (I/Q) signals and recovers GPS clocks.
- the RF interface circuit 302 provides the I/Q signals and GPS clocks to the location processing circuit 306 for digital processing.
- a reference frequency source 308 (e.g., a crystal oscillator) provides a reference clock for the RF interface circuit 302, while the real time clock (RTC) source 310 provides a reference clock for the location processing circuit 306.
- the tracker hardware 102 may be implemented with components available from SiRF Technology, Inc. of San Jose California.
- the RF interface circuit 302 may be implemented as a GRF2i/LP integrated circuit.
- the location processing circuit may be implemented, as examples, as a GSP2t integrated circuit or GSP2e integrated circuit.
- the tracker hardware 102 minimizes the overhead on the host computer 104 and operating system 216 by keeping low the maximum transmission rate of raw measurements to the host computer 104 (e.g., one measurement per second).
- a host-based navigation module 400 located in the host computer 104 of figure 2 in communication with a plurality of user applications 218 is shown.
- the host based navigation module 400 may be located in memory 208.
- the host-based navigation module 400 is generally composed of two sub-modules. The first is the tracker interface module 404 and second is the host navigation processing sub-module 406.
- the tracker interface sub-modules 404 communicate with the tracker hardware 102 via the hardware tracker interface (214 figure 2) and the host navigation processing sub-module 406.
- the tracker interface sub-module sends and receives messages over the serial interface with the tracker module 102. Examples of the messages include a predefined initialization message, status message and location data message.
- the location data received from the tracker hardware 102 by the tracker interface module 404 is made available to the host navigation processing module 406 in predefined data structures. Such data structures may contain fields for latitude, longitudes, and time and take the form of a predefined array of data.
- Each of the plurality of user applications may expect data in one of a plurality of location data standards.
- location or position standards include, but are not limited to; different versions of NEMA183 location data and binary location data.
- Each of the user applications 218 may require a different format for location data.
- the host navigation processor sub module 406 receives location data via a data structure from the tracker interface module 404 and formats the data for the user applications 218.
- the host navigation process sub module 406 also manages communication with the user applications 218 with assistance from the operating system.
- An example of such communication is pipes in an UNIX operating system.
- FIG. 5 a graphical representation 500 of an application program interface (API) layer 502 between user applications 218 located on the host computer 104 and the tracker hardware 102 of figure 2.
- the API layer 502 is a plurality of predefined functions calls that are available for use by user applications to access software functions in the host navigation processing sub module 406.
- the API allows a common interface for user application developers while keeping the implementation details of the host-based navigation module 400 separate from the user applications 218 and common across operating systems.
- An example of API functions calls include, but are not limited to; status, location update and initialization.
- the host navigation sub-module 406 communications with the tracker interface sub module 404 in order to receive location data from the tracker hardware 102.
- FIG 6 a graphical representation 600 of the different layers involved with user applications 218 on the host computer 104 communicating with tracker hardware 102 of figure 5.
- the communication between user applications 218 and the tracker 102 is divided into six layers; user application layer 602, communication interface processing layer 604, client-server interface processing layer 606, user manager and protocol processing layer 608, navigation processing layer 610, and tracker interface layer 612.
- User applications 218 in the user application layer 602 communicate with a communication interface 614 via an API.
- the communication interface 614 notifies the host navigation sub module 406 in the navigation processing layer 610 and the user interface manager 618 in the user manager and protocol processing 608.
- the host navigation processing sub-module 406 then provides the appropriate location data for the user application 218 to the user interface manager 618.
- the user interface manager 618 communicates with the communication interface 614 in order to forward the appropriate location data to a required data forwarder 620.
- the data forwarder 620 formats the location data for one of the respective user applications 218.
- the formatted location data is then sent to the user application that requires the location data.
- the ability to have numerous user applications 218 accessing tracker hardware 102 is accomplished through a layered approach. Further, the communication manager 614 in conjunction with the host navigation processor sub module 406 and the user interface manager 618 enable multiple user application 218 to have diverse location data formats while still sharing common resources and software code.
- FIG 7 a block diagram of a data forwarder 620 in the client server interface-processing layer 606 of figure 6 is shown.
- the data forwarder 620 may be implemented as an data forwarder object 700 in a high level computer software language, such as "C++" or Smalltalk.
- the data forwarder object is able to communicate with the user interface manager 618.
- the location data from the user interface manager 618 results in the polymorphism of the data forwarder object 700 for the different types of location data output, such as for binary data 702 and binary data 704 or for NEMA control 706 and NEMA data 708.
- different instances of data forwarders may be dedicated to specific types of location data formatting.
- step 800 a flowchart 800 of the process for the user application 218 to communicate with the tracker hardware 102 of Figure 6 is illustrated.
- the process starts 802 with the initialization of the host computer 104 in step 804.
- step 806 a determination is made as to whether a request from the user application 218 is received at the communication interface 614. If a request is received in step 806, then in step 808 the communication interface 614 notifies the host navigation processor 406 and the user interface 618. Otherwise, step 806 is repeated until a request from a user application 218 is received.
- the user interface manager receives the location data from the tracker hardware 102 via the tracker interface sub module 404 and the host navigation processor sub module 406.
- the data forwarder 620 is configured in response to data from the user interface manager 618.
- the data may be in the form of location data, or in an alternate embodiment in the form of an instruction. In yet another embodiment the data may be a combination of location data and an instruction.
- the data forwarder 620 formats the location data for transmission to the user application 218 in step 814.
- the procedure of sending data between the tracker hardware 802 and user application 218 via the multiple layers of processing is complete in step 816 when the data arrives at the user application 218.
- An embodiment of the process steps employs at least one machine-readable signal bearing medium.
- machine-readable signal bearing mediums include computer-readable mediums such as a magnetic storage medium (i.e. floppy disks, or optical storage such as compact disk (CD) or digital video disk (DVD)), a biological storage medium, or an atomic storage medium, a discrete logic circuit(s) having logic gates for implementing logic functions upon data signals, an application specific integrated circuit having appropriate logic gates, a programmable gate array(s) (PGA), a field programmable gate array (FPGA), a random access memory device (RAM), read only memory device (ROM), electronic programmable random access memory (EPROM), or equivalent.
- the computer-readable medium could even be paper or anotlier suitable medium, upon which the computer instruction is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
- machine-readable signal bearing medium includes computer-readable signal bearing mediums.
- Computer-readable signal bearing mediums have a modulated carrier signal transmitted over one or more wire based, wireless or fiber optic networks or within a system.
- one or more wire based, wireless or fiber optic network such as the telephone network, a local area network, the Internet, or a wireless network having a component of a computer-readable signal residing or passing through the network.
- the computer readable signal is a representation of one or more machine instructions written in or implemented with any number of programming languages.
- the multiple process steps implemented with a programming language which comprises an ordered listing of executable instructions for implementing logical functions, can be embodied in any machine-readable signal bearing medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, controller-containing system having a processor, microprocessor, digital signal processor, discrete logic circuit functioning as a controller, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions.
Abstract
Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US2004/003534 WO2005085894A1 (en) | 2004-02-06 | 2004-02-06 | Layered host based satellite positioning system and method |
EP04709082A EP1718986A1 (en) | 2004-02-06 | 2004-02-06 | Layered host based satellite positioning system and method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/US2004/003534 WO2005085894A1 (en) | 2004-02-06 | 2004-02-06 | Layered host based satellite positioning system and method |
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WO2005085894A1 true WO2005085894A1 (en) | 2005-09-15 |
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PCT/US2004/003534 WO2005085894A1 (en) | 2004-02-06 | 2004-02-06 | Layered host based satellite positioning system and method |
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WO (1) | WO2005085894A1 (en) |
Citations (8)
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JPH0636190A (en) * | 1992-07-15 | 1994-02-10 | Sony Corp | Position measuring system and position measuring sensor, recording medium, converting device |
US5497339A (en) * | 1993-11-15 | 1996-03-05 | Ete, Inc. | Portable apparatus for providing multiple integrated communication media |
US5519403A (en) * | 1993-11-29 | 1996-05-21 | Motorola, Inc. | Global positioning system communications multi-interface |
US5832247A (en) * | 1995-12-28 | 1998-11-03 | Trimble Navigation Limited | PCI card for receiving a GPS signal |
US5920283A (en) * | 1997-05-09 | 1999-07-06 | Conexant Systems, Inc. | Receiver engine for global positioning system |
US6255988B1 (en) * | 1999-06-03 | 2001-07-03 | Honeywell International Inc | Industrial process field instrumentation employing satellite transmitted reference signals |
US20020196181A1 (en) * | 2001-06-25 | 2002-12-26 | Fall Kevin R. | Integrated network interface card and global positioning system receiver |
US20030234739A1 (en) * | 2002-06-20 | 2003-12-25 | Sirf Technology, Inc. | Generic satellite positioning system receivers with selectable inputs and outputs |
-
2004
- 2004-02-06 WO PCT/US2004/003534 patent/WO2005085894A1/en active Application Filing
- 2004-02-06 EP EP04709082A patent/EP1718986A1/en not_active Withdrawn
Patent Citations (8)
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JPH0636190A (en) * | 1992-07-15 | 1994-02-10 | Sony Corp | Position measuring system and position measuring sensor, recording medium, converting device |
US5497339A (en) * | 1993-11-15 | 1996-03-05 | Ete, Inc. | Portable apparatus for providing multiple integrated communication media |
US5519403A (en) * | 1993-11-29 | 1996-05-21 | Motorola, Inc. | Global positioning system communications multi-interface |
US5832247A (en) * | 1995-12-28 | 1998-11-03 | Trimble Navigation Limited | PCI card for receiving a GPS signal |
US5920283A (en) * | 1997-05-09 | 1999-07-06 | Conexant Systems, Inc. | Receiver engine for global positioning system |
US6255988B1 (en) * | 1999-06-03 | 2001-07-03 | Honeywell International Inc | Industrial process field instrumentation employing satellite transmitted reference signals |
US20020196181A1 (en) * | 2001-06-25 | 2002-12-26 | Fall Kevin R. | Integrated network interface card and global positioning system receiver |
US20030234739A1 (en) * | 2002-06-20 | 2003-12-25 | Sirf Technology, Inc. | Generic satellite positioning system receivers with selectable inputs and outputs |
Non-Patent Citations (1)
Title |
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PATENT ABSTRACTS OF JAPAN vol. 0182, no. 61 (P - 1739) 18 May 1994 (1994-05-18) * |
Also Published As
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EP1718986A1 (en) | 2006-11-08 |
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