JP5583169B2 - Positioning system and positioning method - Google Patents

Description

  The present invention relates to a positioning system and a positioning method.

  In recent years, GPS (Global Positioning System) positioning function is being standardly installed in various portable terminals such as mobile phones, tablet terminals, portable game machines, and the like (for example, see Patent Document 1).

  As main GPS positioning methods, there are a self-supporting GPS positioning method and an assist type GPS (AGPS) positioning method. In the self-supporting GPS positioning method, the mobile terminal obtains information necessary for the positioning process by receiving and decoding the GPS signal from the GPS satellite. Therefore, a strong electric field environment of the GPS signal becomes a necessary condition. It is often difficult to perform positioning.

  On the other hand, in the AGPS positioning system, the mobile terminal receives the approximate position information (latitude, longitude, etc.) of the mobile terminal, orbit information of the GPS satellite (almanac information, ephemeris information, etc.) from the AGPS server via a network such as a mobile phone network. ), Information necessary for the positioning process such as time correction parameters (hereinafter referred to as “assist information”). Therefore, the portable terminal can omit the GPS signal decoding process, and can shorten the positioning time, expand the positioning possible area, and the like.

  SUPL (Secure User Plane Location) 1.0 stipulated by OMA (Open Mobile Alliance) is an AGPS positioning method for transmitting and receiving assist information, position information, etc. between a mobile terminal and an AGPS server. . SUPL 1.0 uses an existing wireless IP (Internet Protocol) network and enables communication independent of a communication bearer. The mobile terminal and the AGPS server communicate with each other by ULP (User-Plane Location Protocol). ULP is a binary protocol and supports eight types of messages. These messages are used to start a SUPL session, exchange assist information, location information, etc., and end the SUPL session.

  FIG. 9 is a diagram illustrating an example of an operation sequence of the positioning system when the operation is started from the AGPS server and the positioning process is executed by the AGPS server.

  Upon receiving the inquiry about the location of the mobile terminal, the AGPS server transmits a SUPL INIT message to the mobile terminal by SMS (Short Message Service) or WAP (Wireless Application Protocol) push (step S900). This message includes an access code, an AGPS server address, a server-driven positioning request (NI-LR (Network Induced Location Request), SET (SUPL Enabled Terminal) -Assisted), a session identification number (ID), and the like.

  The portable terminal authenticates the received access code and connects to the IP network. The mobile terminal establishes a connection with the AGPS server (step S902).

  The portable terminal transmits a SUPL POS INIT message to the AGPS server (step S904). This message includes the ID of the connected base station, the ID of the surrounding base station and the received radio wave intensity, the assist information request, the session ID, and the like.

  The AGPS server obtains approximate position information, GPS satellite orbit information, time correction parameters, and the like corresponding to the received base station ID, and creates assist information (step S906).

  The AGPS server transmits a SUPL POS message to the mobile terminal (step S908). This message includes assist information, a session ID, and the like. The AGPS server and the mobile terminal may exchange several SUPL POS messages while performing the positioning process.

  The portable terminal captures a GPS satellite based on the received assist information, receives and decodes a GPS signal from the GPS satellite, and acquires time information and the like (step S910).

  The portable terminal transmits a SUPL POS message to the AGPS server (step S912). This message includes time information, a session ID, and the like.

  The AGPS server performs positioning processing based on the received time information and the like (step S914). In addition, the AGPS server transmits the positioning result (position information and error) to the inquiry source.

  The AGPS server transmits a SUPL END message to the mobile terminal (step S916). This message terminates the SUPL session.

  With the above procedure, the AGPS server can specify the location of the mobile terminal and provide it to the inquiry source.

Japanese Patent Laying-Open No. 2005-083559

  However, GPS positioning cannot be used in places where the top of the zenith is not good, such as indoors and valleys of buildings. Also, since SUPL 1.0 does not support positioning methods other than GPS, other positioning methods cannot be used. On the other hand, although other positioning methods can be used for SUPL 2.0, a significant cost is required for updating the positioning system when shifting to SUPL 2.0.

  The present invention has been made to solve such a conventional problem, and while making the best use of the existing positioning system, the present invention complements the drawbacks of the existing positioning system and enables positioning even in places where the zenith is not well-viewed. It is an object of the present invention to provide a positioning system and a positioning method that make it possible.

  A positioning system according to the present invention is a positioning system that includes a server and a mobile terminal that can be connected to the server via a network. The server includes a communication unit that communicates with the mobile terminal, and the mobile terminal is server-driven. In the case where a positioning request is transmitted, a server processing unit that transmits a positioning result transmission request to the mobile terminal when a change request to terminal-driven positioning is received from the mobile terminal. When receiving a transmission request from a communication unit that performs communication, a terminal positioning unit that executes a plurality of types of positioning processing, a selection unit that selects a positioning result with the smallest error among a plurality of positioning results, and a server, And a terminal processing unit that transmits the selected positioning result to the server.

  In the positioning system according to the present invention, the server stores a determination list indicating a rough position where positioning is difficult, and difficult positioning that determines whether the rough position is a difficult positioning position based on the determination list. The server positioning unit further includes a position determination unit and a server positioning unit that executes positioning processing, and when the approximate location position of the mobile terminal is a difficult positioning position, the server positioning unit is for specifying the location position of the mobile terminal. It is preferable to execute a positioning process.

  In the positioning system according to the present invention, the server further includes a determination list update unit that updates the determination list, and when the positioning fails on the mobile terminal, the determination list update unit has an approximate location of the mobile terminal. It is preferable to update the determination list so that it is included.

  In the positioning system according to the present invention, it is preferable that the server processing unit outputs a positioning result obtained by the mobile terminal or the server positioning unit to the outside.

  The positioning method according to the present invention is a positioning method in a positioning system having a server and a mobile terminal connectable to the server via a network, and the server transmits a server-driven positioning request to the mobile terminal. When a change request from the mobile terminal to terminal-driven positioning is received, a transmission request for the positioning result is transmitted to the mobile terminal. When the mobile terminal receives the transmission request from the server, the mobile terminal executes a plurality of types of positioning processes. Then, the positioning result with the smallest error is selected from the plurality of positioning results, and the selected positioning result is transmitted to the server.

  The positioning system and the positioning method according to the present invention change the server-driven positioning to terminal-driven positioning, and allow the mobile terminal to execute a plurality of types of positioning processes, thereby enabling positioning even in places where the zenith is not well-viewed.

It is a figure which shows an example of schematic structure of a positioning system. It is a figure which shows an example of schematic structure of a portable terminal. It is a figure which shows an example of schematic structure of an AGPS server. It is a figure which shows an example of schematic structure of a wireless LAN positioning server, and a positioning table. It is a figure which shows an example of the operation | movement sequence of a positioning system. It is a figure which shows an example of schematic structure of an AGPS server. It is a figure which shows an example of the operation | movement sequence of a positioning system in case the location position of a portable terminal is a difficult positioning position. It is a figure which shows an example of the operation | movement sequence of a positioning system when positioning fails with a portable terminal. It is a figure which shows an example of the operation | movement sequence of a positioning system in the case of starting operation | movement from an AGPS server and performing a positioning process with an AGPS server.

  Hereinafter, various embodiments of the present invention will be described with reference to the drawings. However, it should be noted that the technical scope of the present invention is not limited to these embodiments, and extends to the invention described in the claims and equivalents thereof.

(First embodiment)
In the present embodiment, when the AGPS server transmits a server-driven positioning request (NI-LR, SET-Assisted) to the mobile terminal, a change request from the mobile terminal to the terminal-driven positioning (NI-LR, SET-Based) Is received, the mobile terminal accepts the request and permits the mobile terminal to execute the positioning process. The portable terminal uses both the GPS positioning method and the wireless LAN positioning method, executes the positioning process for each, acquires the positioning result, and selects the one with the smaller error. The portable terminal transmits the selected positioning result to the AGPS server.

  FIG. 1 is a diagram illustrating an example of a schematic configuration of the positioning system 1.

  The positioning system 1 includes at least a mobile terminal 2, a GPS satellite 3, an AGPS server 4, and a wireless LAN positioning server 5. The mobile terminal 2 and the AGPS server 4 and the wireless LAN positioning server 5 are connected to each other via a communication network such as a public communication line or a wireless communication line. The mobile terminal 2 and the AGPS server 4 are connected to the base station 6 or the mobile phone. The mobile terminal 2 and the wireless LAN positioning server 5 are connected to each other via the telephone network 7 and the base station 6, the mobile phone network 7, the gateway 8, and the Internet 9. Further, the portable terminal 2 and the wireless LAN positioning server 5 are also connected to each other via a wireless LAN access point 10, a backbone network 11, a gateway 8, and the Internet 9. The portable terminal 2 and the AGPS server 4 communicate with each other using ULP (User-Plane Location Protocol), and the portable terminal 2 and the wireless LAN positioning server 5 communicate with each other using HTTP (HyperText Transfer Protocol).

  FIG. 2 is a diagram illustrating an example of a schematic configuration of the mobile terminal 2.

  The mobile terminal 2 performs information communication with a server, a communication device, or the like connected to the mobile phone network 7 or the Internet 9 via the mobile phone network 7, and a server connected to the Internet 9 via a wireless LAN. Communicate information with communication devices. Furthermore, the portable terminal 2 performs GPS positioning and wireless LAN positioning. Therefore, the mobile terminal 2 includes a terminal first communication unit 21, a terminal second communication unit 22, a GPS unit 23, a terminal storage unit 24, an operation unit 25, a display unit 26, and a terminal processing unit 27. Have

  The terminal first communication unit 21 includes a communication interface circuit for connecting the mobile terminal 2 to the mobile phone network 7. The terminal first communication unit 21 establishes a radio signal line by a CDMA (Code Division Multiple Access) method or the like with the base station 6 via a channel assigned by the base station 6, and communicates with the base station 6. Perform information communication. And the terminal 1st communication part 21 receives information via the mobile telephone network 7 from the AGPS server 4 connected to the mobile telephone network 7, and the wireless LAN positioning server 5 connected to the internet 9, This received information Is sent to the terminal processing unit 27. In addition, the terminal first communication unit 21 transmits the information received from the terminal processing unit 27 to the AGPS server 4 and the wireless LAN positioning server 5 via the mobile phone network 7 and the Internet 9.

  The terminal second communication unit 22 includes a communication interface circuit including an antenna whose sensitivity band is a 2.4 GHz band used in the wireless communication system of the IEEE 802.11 standard, and the mobile terminal 2 is connected to the backbone network 11 via the antenna. Connect to. The terminal second communication unit 22 establishes a wireless communication line based on the wireless communication scheme of the IEEE 802.11 standard with the access point 10 and performs information communication with the access point 10. The terminal second communication unit 22 receives information from the wireless LAN positioning server 5 connected to the Internet 9 via the backbone network 11 and sends the received information to the terminal processing unit 27. In addition, the terminal second communication unit 22 transmits the information received from the terminal processing unit 27 to the wireless LAN positioning server 5 via the backbone network 11.

  The GPS unit 23 includes a GPS circuit including an antenna whose sensitivity band is a 1.5 GHz band used in the GPS positioning method, and receives a GPS signal from the GPS satellite 3. The GPS unit 23 acquires assist information from the terminal storage unit 24, and captures the GPS satellite 3 based on the assist information. The GPS unit 23 receives and decodes a GPS signal from the GPS satellite 3 to acquire time information and the like. Then, the GPS unit 23 calculates the pseudo distance from the GPS satellite 3 to the mobile terminal 2 based on the time information and the like, and solves the simultaneous equations obtained by substituting the pseudo distance to thereby determine the position of the mobile terminal 2. (Latitude, longitude, altitude, etc.) and error are calculated. The GPS unit 23 sends the position information and error to the terminal storage unit 24, and the terminal storage unit 24 stores it.

  The terminal storage unit 24 includes, for example, at least one of a semiconductor memory, a magnetic disk device, and an optical disk device. The terminal storage unit 24 stores an operating system program, application programs, data, and the like used for processing in the terminal processing unit 27. For example, the terminal storage unit 24, as an application program, a SUPL processing program that executes processing specified by SUPL 1.0, a wireless LAN positioning program that performs wireless LAN positioning, and position information selection that selects one piece of position information from a plurality of pieces of position information A program, a position information encoding program for encoding position information and errors, a web browser program for acquiring and displaying a web page, an e-mail program for transmitting and receiving an e-mail, and the like are stored. In addition, the terminal storage unit 24 includes, as data, ID of the connected base station 6, ID of the neighboring base station 6 and received radio wave intensity, SUPL 1.0 and RRLP (Radio Resource LCS Protocol) stipulated assist information (base Approximate position information corresponding to the station ID, orbit information of GPS satellite 3, time correction parameters, etc.), position information and error by GPS positioning, ID and received radio wave intensity of surrounding access point 10, position information by wireless LAN positioning, and Error, selected position information, encoded position information, video data, image data, etc. are stored. Further, the terminal storage unit 24 may temporarily store temporary data related to a predetermined process.

  The operation unit 25 may be any device as long as the operation of the mobile terminal 2 is possible, for example, a touch pad, a keyboard, or the like. The user can input letters, numbers, and the like using this device. When operated by the user, the operation unit 25 generates a signal corresponding to the operation. The generated signal is input to the terminal processing unit 27 as a user instruction.

  The display unit 26 may be any device as long as it can display images, images, and the like, such as a liquid crystal display and an organic EL (Electro-Luminescence) display. The display unit 26 displays a video corresponding to the video data supplied from the terminal processing unit 27, an image corresponding to the image data, and the like.

  The terminal processing unit 27 has one or a plurality of processors and their peripheral circuits. The terminal processing unit 27 controls the overall operation of the mobile terminal 2 and is, for example, a CPU (Central Processing Unit). That is, the terminal processing unit 27 performs the terminal first communication so that various processes of the mobile terminal 2 are executed in an appropriate procedure according to the operation of the operation unit 25, the program stored in the terminal storage unit 24, and the like. The operations of the unit 21, the terminal second communication unit 22, the GPS unit 23, the display unit 26, and the like are controlled. The terminal processing unit 27 executes processing based on a program (operating system program, application program, etc.) stored in the terminal storage unit 24. The terminal processing unit 27 can execute a plurality of programs (such as application programs) in parallel.

  The terminal processing unit 27 includes a SUPL processing unit 271, a wireless LAN positioning unit 272, a location information selection unit 273, and a location information encoding unit 274. Each of these units included in the terminal processing unit 27 is a functional module implemented by a program executed on a processor included in the terminal processing unit 27. Alternatively, these units included in the terminal processing unit 27 may be mounted on the mobile terminal 2 as firmware.

  The SUPL processing unit 271 mainly executes processing specified by SUPL 1.0. The SUPL processing unit 271 connects to the AGPS server 4 in accordance with the provisions of SUPL 1.0, and transmits and receives data to and from the AGPS server 4. Details of the process will be described later.

  The wireless LAN positioning unit 272 performs wireless LAN positioning. Here, the actual positioning process is executed by the wireless LAN positioning server 5, and the wireless LAN positioning unit 272 transmits information necessary for the positioning process to the wireless LAN positioning server 5. However, the actual positioning process can also be executed by the wireless LAN positioning unit 272. Details of the process will be described later.

  The position information selection unit 273 selects one position information from the plurality of position information. The position information selection unit 273 acquires the position information and the error by the GPS positioning and the wireless LAN positioning from the terminal storage unit 24, compares the respective errors with the horizontal direction error, and selects the one with the smaller error. Further, the position information selection unit 273 sends the position information and the error to the terminal storage unit 24, and the terminal storage unit 24 stores them.

  The position information encoding unit 274 encodes position information and an error. The location information encoding unit 274 acquires the selected location information and error from the terminal storage unit 24 and encodes them according to the RRLP rules. Further, the position information encoding unit 274 sends the position information and the error to the terminal storage unit 24, and the terminal storage unit 24 stores this.

  Hereinafter, processing by the SUPL processing unit 271 will be described.

  When an access code, an AGPS server 4 address, a server-driven positioning request, a session ID, etc. are received as a SUPL INIT message from the AGPS server 4 via the terminal first communication unit 21, the SUPL processing unit 271 receives the received access. The code is authenticated, connected to the IP network via the terminal first communication unit 21, and the connection with the AGPS server 4 is established. Further, the SUPL processing unit 271 acquires the ID of the connected base station 6 and the IDs and received radio wave strengths of the neighboring base stations 6 from the terminal storage unit 24, and requests to change to terminal-driven positioning, assist information Along with the request, the session ID, etc., it is transmitted to the AGPS server 4 via the terminal first communication unit 21 as a SUPL POS INIT message.

  When assist information, session ID, and the like are received as a SUPL POS message from the AGPS server 4 via the terminal first communication unit 21, the SUPL processing unit 271 sends the received assist information to the terminal storage unit 24, and the terminal The storage unit 24 stores this. Further, the SUPL processing unit 271 causes the GPS unit 23, the wireless LAN positioning unit 272, the position information selection unit 273, and the position information encoding unit 274 to execute respective processes. Then, the SUPL processing unit 271 acquires the encoded position information and error from the terminal storage unit 24, and sends it to the AGPS server 4 via the terminal first communication unit 21 as a SUPL POS message together with the positioning success or failure. Send.

  When the SUPL END message is received from the AGPS server 4 via the terminal first communication unit 21, the SUPL processing unit 271 ends the SUPL session.

  Next, processing by the wireless LAN positioning unit 272 will be described.

  The wireless LAN positioning unit 272 scans all the channels via the terminal second communication unit 22 and detects surrounding access points 10. Then, the wireless LAN positioning unit 272 sends the ID and received radio wave intensity to the terminal storage unit 24, and the terminal storage unit 24 stores them. Further, the wireless LAN positioning unit 272 transmits the ID and received radio wave intensity to the wireless LAN positioning server 5 via the terminal first communication unit 21.

  When the corresponding position information and error are received from the wireless LAN positioning server 5 via the terminal first communication unit 21, the wireless LAN positioning unit 272 sends the received position information and error to the terminal storage unit 24, and the terminal The storage unit 24 stores this.

  FIG. 3 is a diagram illustrating an example of a schematic configuration of the AGPS server 4.

  The AGPS server 4 is connected to the mobile phone network 7 and is connected to the mobile terminal 2 via the mobile phone network 7 to perform information communication. In addition, the AGPS server 4 creates assist information and transmits it to the mobile terminal 2. For this purpose, the AGPS server 4 includes a first server communication unit 41, a first server storage unit 42, and a first server processing unit 43.

  The first server communication unit 41 has a communication interface circuit for connecting the AGPS server 4 to the mobile phone network 7. The first server communication unit 41 receives information from the mobile terminal 2 via the mobile phone network 7, and sends the received information to the first server processing unit 43. The first server communication unit 41 transmits the information received from the first server processing unit 43 to the mobile terminal 2 via the mobile phone network 7.

  The first server storage unit 42 includes, for example, at least one of a magnetic tape device, a magnetic disk device, and an optical disk device. The first server storage unit 42 stores an operating system program, application programs, data, and the like used for processing in the first server processing unit 43. For example, the first server storage unit 42 stores, as an application program, a SUPL processing program that executes processing defined in SUPL 1.0. Moreover, the 1st server memory | storage part 42 is the base station to which the conversion table which shows the correspondence of ID of the base station 6, and approximate position as a data, the orbit information of the GPS satellite 3, the time correction parameter, and the portable terminal 2 is connected. 6, the ID of the surrounding base station 6 and the received radio wave intensity, the location information and error of the portable terminal 2, the positioning success / failure in the portable terminal 2, etc. Further, the first server storage unit 42 may temporarily store temporary data related to a predetermined process.

  The first server processing unit 43 includes one or a plurality of processors and their peripheral circuits. The first server processing unit 43 controls the overall operation of the AGPS server 4 and is, for example, a CPU (Central Processing Unit). That is, the first server processing unit 43 performs the first server communication unit 41 so that various processes of the AGPS server 4 are executed in an appropriate procedure according to a program stored in the first server storage unit 42. Etc. are controlled. The first server processing unit 43 executes processing based on a program (operating system program, application program, etc.) stored in the first server storage unit 42. Further, the first server processing unit 43 can execute a plurality of programs (such as application programs) in parallel.

  The first server processing unit 43 includes a SUPL processing unit 431. Each of these units included in the first server processing unit 43 is a functional module implemented by a program executed on a processor included in the first server processing unit 43. Alternatively, these units included in the first server processing unit 43 may be implemented in the AGPS server 4 as firmware.

  The SUPL processing unit 431 mainly executes processing specified by SUPL 1.0. The SUPL processing unit 431 is connected to the mobile terminal 2 in accordance with the provisions of SUPL 1.0, and transmits and receives data to and from the mobile terminal 2.

  Upon receiving an inquiry about the location of the mobile terminal 2, the SUPL processing unit 431 sends an access code, an address of the AGPS server 4, server-driven positioning as a SUPL INIT message to the mobile terminal 2 via the first server communication unit 41. Request, session ID, etc. are transmitted.

  Request for change from the mobile terminal 2 to the terminal-driven positioning via the first server communication unit 41 as the SUPL POS INIT message, the ID of the connected base station 6, the ID and received radio wave intensity of the surrounding base station 6, When the assist information request, the session ID, and the like are received, the SUPL processing unit 431 rejects the request to change to the terminal-driven positioning in a normal procedure and forcibly terminates the SUPL session. Accept and maintain a SUPL session. Then, the SUPL processing unit 431 sends the received ID of the base station 6 and the IDs and received radio wave strengths of the neighboring base stations 6 to the first server storage unit 42, and the first server storage unit 42 stores them. . Further, the SUPL processing unit 431 refers to the conversion table stored in the first server storage unit 42 using the received ID of the base station 6 as a key, and acquires the corresponding approximate position information. Further, the SUPL processing unit 431 also acquires the orbit information of the GPS satellite 3, the time correction parameter, and the like from the first server storage unit 42, and creates SUPL 1.0 and RRLP-defined assist information from the series of information. The SUPL processing unit 431 transmits the assist information to the mobile terminal 2 via the first server communication unit 41.

  When the location information and error of the mobile terminal 2, the success or failure of positioning in the mobile terminal 2 are received as the SUPL POS message from the mobile terminal 2 via the first server communication unit 41, the SUPL processing unit 431 The information, error, and positioning success / failure are sent to the first server storage unit 42, and the first server storage unit 42 stores them. Further, the SUPL processing unit 431 transmits the position information and error to the inquiry source. Then, the SUPL processing unit 431 transmits the SUPL END message to the mobile terminal 2 via the first server communication unit 41, and then ends the SUPL session.

  FIG. 4A is a diagram illustrating an example of a schematic configuration of the wireless LAN positioning server 5.

  The wireless LAN positioning server 5 is connected to the Internet 9 and connected to the mobile terminal 2 via the mobile phone network 7 or the wireless LAN to perform information communication. In addition, the wireless LAN positioning server 5 acquires position information and transmits it to the mobile terminal 2. For this purpose, the wireless LAN positioning server 5 includes a second server communication unit 51, a second server storage unit 52, and a second server processing unit 53.

  The second server communication unit 51 has a communication interface circuit for connecting the wireless LAN positioning server 5 to the Internet 9. The second server communication unit 51 receives information from the mobile terminal 2 via the mobile phone network 7 or the wireless LAN, and sends the received information to the second server processing unit 53. The second server communication unit 51 transmits the information received from the second server processing unit 53 to the mobile terminal 2 via the mobile phone network 7 or the wireless LAN.

  The second server storage unit 52 includes, for example, at least one of a magnetic tape device, a magnetic disk device, and an optical disk device. The second server storage unit 52 stores an operating system program, application programs, data, and the like used for processing in the second server processing unit 53. For example, the second server storage unit 52 stores, as an application program, a wireless LAN positioning program that performs wireless LAN positioning. In addition, the second server storage unit 52 stores, as data, a positioning table indicating the correspondence between the ID of the access point 10 and the received radio wave intensity, position, and error. Further, the second server storage unit 52 may temporarily store temporary data related to a predetermined process.

  FIG. 4B is a diagram illustrating an example of a positioning table.

  The positioning table stores predetermined data for each pattern of radio wave reception intensity received by the mobile terminal 2 at a predetermined position. The positioning table stores data of up to three access points 10 for one pattern. The data of each access point 10 is composed of an ID and received radio wave intensity.

  Further, the positioning table stores the corresponding position and error for one pattern. This position indicates a position (latitude, longitude, etc.) estimated as the location of the mobile terminal 2 when the received intensity of the radio wave received by the mobile terminal 2 is the received radio wave intensity of the corresponding pattern. is there. This error indicates the accuracy of the estimated position.

  Returning to FIG. 4A, the second server processing unit 53 includes one or a plurality of processors and their peripheral circuits. The second server processing unit 53 controls the overall operation of the wireless LAN positioning server 5 and is, for example, a CPU (Central Processing Unit). That is, the second server processing unit 53 performs the second server communication so that various processes of the wireless LAN positioning server 5 are executed in an appropriate procedure according to the program stored in the second server storage unit 52. The operation of the unit 51 and the like is controlled. The second server processing unit 53 executes processing based on a program (operating system program, application program, etc.) stored in the second server storage unit 52. The second server processing unit 53 can execute a plurality of programs (such as application programs) in parallel.

  When receiving the ID and the received radio wave intensity of the peripheral access point 10 from the portable terminal 2 via the second server communication unit 51, the second server processing unit 53 uses the received ID and the received radio wave intensity as a key. 2 Referring to the positioning table stored in the server storage unit 52, the corresponding position information and error are acquired. In addition, the second server processing unit 53 transmits the position information and the error to the mobile terminal 2 via the second server communication unit 51.

  The received ID and received radio wave intensity are compared with the ID and received radio wave intensity stored in the positioning table by determining whether or not their correlation coefficient is greater than a predetermined threshold value. Do. For example, in the case where the positioning table shown in FIG. 4B is provided, {(ID = a, strength = 10), (ID = b, strength = 20), (ID = C, intensity = 40)} is received, the pattern 2 is specified because the correlation coefficient with the pattern 2 increases.

  FIG. 5 is a diagram illustrating an example of an operation sequence of the positioning system 1. The operation sequence described below is mainly based on programs stored in advance in the terminal storage unit 24, the first server storage unit 42, and the second server storage unit 52, and the terminal processing unit 27, the first server. It is executed by the processing unit 43 and the second server processing unit 53 in cooperation with each element of the mobile terminal 2, the AGPS server 4, and the wireless LAN positioning server 5.

  When receiving the inquiry about the location of the mobile terminal 2, the SUPL processing unit 431 of the AGPS server 4 sends the access code and the address of the AGPS server 4 as a SUPL INIT message to the mobile terminal 2 via the first server communication unit 41. Then, a server-driven positioning request, a session ID, etc. are transmitted (step S500).

  When the access code, the address of the AGPS server 4, the server-driven positioning request, the session ID, etc. are received as a SUPL INIT message from the AGPS server 4 via the terminal first communication unit 21, the SUPL processing unit 271 of the mobile terminal 2 The received access code is authenticated, connected to the IP network via the terminal first communication unit 21, and the connection with the AGPS server 4 is established (step S502).

  The SUPL processing unit 271 acquires the ID of the connected base station 6 and the IDs and received radio wave strengths of the neighboring base stations 6 from the terminal storage unit 24, requests to change to terminal-driven positioning, assist information requests, Along with the session ID and the like, it is transmitted as a SUPL POS INIT message to the AGPS server 4 via the terminal first communication unit 21 (step S504).

  Request for change from the mobile terminal 2 to the terminal-driven positioning via the first server communication unit 41 as the SUPL POS INIT message, the ID of the connected base station 6, the ID and received radio wave intensity of the surrounding base station 6, When the assist information request, the session ID, and the like are received, the SUPL processing unit 431 of the AGPS server 4 displays the received ID of the base station 6, the IDs of the neighboring base stations 6 and the received radio wave intensity as the first server storage unit 42 The first server storage unit 42 stores this. Further, the SUPL processing unit 431 refers to the conversion table stored in the first server storage unit 42 using the received ID of the base station 6 as a key, and acquires the corresponding approximate position information. Further, the SUPL processing unit 431 also obtains orbit information, time correction parameters, and the like of the GPS satellite 3 from the first server storage unit 42, and creates SUPL 1.0 and RRLP prescribed assist information from a series of information (step) S506).

  The SUPL processing unit 431 transmits the assist information to the mobile terminal 2 via the first server communication unit 41 (step S508).

  When assist information, session ID, etc. are received as a SUPL POS message from the AGPS server 4 via the terminal first communication unit 21, the SUPL processing unit 271 of the mobile terminal 2 stores the received assist information in the terminal storage unit 24. The terminal storage unit 24 stores this. Further, the SUPL processing unit 271 causes the GPS unit 23, the wireless LAN positioning unit 272, the position information selection unit 273, and the position information encoding unit 274 to execute respective processes.

  That is, the GPS unit 23 acquires assist information from the terminal storage unit 24 and captures the GPS satellite 3 based on the assist information. Further, the GPS unit 23 receives and decodes a GPS signal from the GPS satellite 3, and acquires time information and the like (step S510).

  The GPS unit 23 calculates the pseudo distance from the GPS satellite 3 to the mobile terminal 2 based on the time information and the like, and solves the simultaneous equations obtained by substituting the pseudo distance, whereby the position and error of the mobile terminal 2 are calculated. Is calculated (step S512). Further, the GPS unit 23 sends the position information and error to the terminal storage unit 24, and the terminal storage unit 24 stores this.

  The wireless LAN positioning unit 272 scans all channels via the terminal second communication unit 22 and detects the peripheral access point 10 (step S514). Then, the wireless LAN positioning unit 272 sends the ID and received radio wave intensity to the terminal storage unit 24, and the terminal storage unit 24 stores them.

  Further, the wireless LAN positioning unit 272 transmits the ID and received radio wave intensity to the wireless LAN positioning server 5 via the terminal first communication unit 21 (step S516).

  When the ID and received radio wave intensity of the peripheral access point 10 are received from the portable terminal 2 via the second server communication unit 51, the second server processing unit 53 of the wireless LAN positioning server 5 receives the received ID and received radio wave. Using the strength as a key, the positioning table stored in the second server storage unit 52 is referred to, and the corresponding position information and error are acquired (step S518).

  The second server processing unit 53 transmits the position information and the error to the mobile terminal 2 via the second server communication unit 51 (Step S520).

  When receiving the position information and error from the wireless LAN positioning server 5 via the terminal first communication unit 21, the wireless LAN positioning unit 272 sends the received position information and error to the terminal storage unit 24, and stores the terminal information. The unit 24 stores this.

  The position information selection unit 273 acquires the position information and the error by the GPS positioning and the wireless LAN positioning from the terminal storage unit 24, compares the respective errors with the horizontal direction error, and selects the one with the smaller error (step). S522). Further, the position information selection unit 273 sends the position information and the error to the terminal storage unit 24, and the terminal storage unit 24 stores them.

  The location information encoding unit 274 acquires the selected location information and error from the terminal storage unit 24, and encodes them according to the RRLP rules (step S524). Further, the position information encoding unit 274 sends the position information and the error to the terminal storage unit 24, and the terminal storage unit 24 stores this.

  The SUPL processing unit 271 of the portable terminal 2 acquires the encoded position information and error from the terminal storage unit 24, and sends the AGPS server as a SUPL POS message along with the positioning success / failure via the terminal first communication unit 21. 4 (step S526).

  When the location information and error of the mobile terminal 2, the success or failure of positioning in the mobile terminal 2 are received as a SUPL POS message from the mobile terminal 2 via the first server communication unit 41, the SUPL processing unit 431 of the AGPS server 4 The received position information and error, and the positioning success / failure are sent to the first server storage unit 42, and the first server storage unit 42 stores them. Further, the SUPL processing unit 431 transmits the position information and error to the inquiry source. Then, the SUPL processing unit 431 transmits the SUPL END message to the mobile terminal 2 via the first server communication unit 41 (step S528), and ends the SUPL session.

  When the SUPL END message is received from the AGPS server 4 via the terminal first communication unit 21, the SUPL processing unit 271 of the mobile terminal 2 ends the SUPL session.

  As described above, by changing the server-driven positioning to the terminal-driven positioning and causing the mobile terminal 2 to execute a plurality of types of positioning processing, positioning can be performed even in places where the zenith is not well-viewed.

(Second Embodiment)
In the first embodiment, when both GPS positioning and wireless LAN positioning have failed in the mobile terminal 2, the AGPS server 4 performs positioning by itself. However, since GPS positioning and wireless LAN positioning take a very long time, when both GPS positioning and wireless LAN positioning have failed in the mobile terminal 2, the mobile terminal 2 notifies the AGPS server 4 to that effect. At the expense of very long service hours. Therefore, in the present embodiment, when it is predicted that both GPS positioning and wireless LAN positioning will fail in the mobile terminal 2, the AGPS server 4 ′ performs positioning by itself from the beginning.

  FIG. 6 is a diagram illustrating an example of a schematic configuration of the AGPS server 4 ′. In addition, among this schematic structure, about the 1st server communication part 41, since it is the same as what is shown by FIG. 3, description is abbreviate | omitted below.

  In addition to what is stored in the first server storage unit 42 shown in FIG. 3, the first server storage unit 42 ′ has an application program where the location of the mobile terminal 2 is indoors, in a valley of a building, etc. A hard positioning position determination program for determining whether or not the position is a difficult positioning position, a cell positioning program for performing cell positioning, a determination list update program for updating the determination list, and the like are stored. Further, the first server storage unit 42 ′ includes, as data, a determination list indicating a rough position where positioning is difficult, a positioning table indicating a correspondence relationship between the ID and received radio wave intensity, position, and error of the base station 6, a rough position, and positioning. A count table or the like indicating the correspondence of the number of failures is stored.

  The first server processing unit 43 ′ performs processing based on programs (operating system programs, application programs, etc.) stored in the first server storage unit 42 ′.

  The first server processing unit 43 ′ includes a SUPL processing unit 431 ′, a difficult positioning position determination unit 432, a cell positioning unit 433, and a determination list update unit 434.

  The SUPL processing unit 431 'mainly executes processing specified by SUPL 1.0. Details of the process will be described later.

  The difficult positioning position determination unit 432 determines whether or not the location of the mobile terminal 2 is a difficult positioning position. The difficult positioning position determination unit 432 acquires the ID of the base station 6 from the first server storage unit 42 ′, refers to the conversion table stored in the first server storage unit 42 ′ using the ID as a key, and To obtain approximate position information. Further, the difficult positioning position determination unit 432 refers to the determination list stored in the first server storage unit 42 ′ by using the approximate position information as a key, and determines whether or not it is registered. If registered, the difficult positioning position determination unit 432 determines that the location of the mobile terminal 2 is a difficult positioning position. On the other hand, if it is not registered, the difficult positioning position determination unit 432 determines that the location of the mobile terminal 2 is not a difficult positioning position.

  The cell positioning unit 433 performs cell positioning. The cell positioning unit 433 acquires the IDs and received radio field strengths of the surrounding base stations 6 from the first server storage unit 42 ′, and stores them in the first server storage unit 42 ′ using the IDs and the received radio field strengths as keys. The corresponding position information and error are acquired by referring to the positioning table. Further, the cell positioning unit 433 sends the position information and error to the first server storage unit 42 ′, and the first server storage unit 42 ′ stores them.

  The determination list update unit 434 updates the determination list. The determination list update unit 434 obtains the ID of the base station 6 from the first server storage unit 42 ′, refers to the conversion table stored in the first server storage unit 42 ′ using the ID as a key, and corresponds. Obtain approximate location information. In addition, the determination list update unit 434 refers to the count table stored in the first server storage unit 42 ′ using the approximate position information as a key, and registers the corresponding position after registration if the corresponding relationship is not registered. Increment the number of failures. Then, the determination list update unit 434 determines whether or not the number of positioning failures is greater than a predetermined threshold value. If it is larger than the predetermined threshold value, the determination list update unit 434 deletes the correspondence relationship from the count table stored in the first server storage unit 42 ′, and the approximate position information is stored in the first server. Register in the determination list stored in the storage unit 42 ′.

  Hereinafter, processing by the SUPL processing unit 431 ′ will be described.

  Request for change from the mobile terminal 2 to the terminal-driven positioning via the first server communication unit 41 as the SUPL POS INIT message, the ID of the connected base station 6, the ID and received radio wave intensity of the surrounding base station 6, Upon receiving the assist information request, the session ID, etc., the SUPL processing unit 431 ′ sends the received ID of the base station 6, the ID of the neighboring base station 6 and the received radio wave intensity to the first server storage unit 42 ′. The first server storage unit 42 ′ stores this. The SUPL processing unit 431 ′ causes the difficult positioning position determination unit 432 to execute the process. Then, when the difficult positioning position determination unit 432 determines that the location of the mobile terminal 2 is the difficult positioning position, the SUPL processing unit 431 ′ sends a SUPL END message via the first server communication unit 41. After transmitting to the portable terminal 2, the SUPL session is terminated. Further, the SUPL processing unit 431 'causes the cell positioning unit 433 to execute the process. Further, the SUPL processing unit 431 ′ acquires the position information and error of the mobile terminal 2 from the first server storage unit 42 ′ and transmits it to the inquiry source.

  On the other hand, when the difficult positioning position determination unit 432 determines that the location of the mobile terminal 2 is not the difficult positioning position, the SUPL processing unit 431 ′ follows normal procedures such as creation of assist information. Then, after ending the SUPL session, the SUPL processing unit 431 ′ acquires positioning success / failure from the first server storage unit 42 ′ and determines whether positioning has failed. When the positioning fails, the SUPL processing unit 431 'causes the cell positioning unit 433 and the determination list update unit 434 to execute the respective processes. Further, the SUPL processing unit 431 ′ acquires the position information and error of the mobile terminal 2 from the first server storage unit 42 ′ and transmits it to the inquiry source.

  FIG. 7 is a diagram illustrating an example of an operation sequence of the positioning system 1 ′ when the location of the mobile terminal 2 is a difficult positioning position. In this operation sequence, steps S500 to S506 and 528 are the same as those shown in FIG.

  Request for change from the mobile terminal 2 to the terminal-driven positioning via the first server communication unit 41 as the SUPL POS INIT message, the ID of the connected base station 6, the ID and received radio wave intensity of the surrounding base station 6, Upon receiving the assist information request, the session ID, etc., the SUPL processing unit 431 ′ sends the received ID of the base station 6, the ID of the neighboring base station 6 and the received radio wave intensity to the first server storage unit 42 ′. The first server storage unit 42 ′ stores this. The SUPL processing unit 431 ′ causes the difficult positioning position determination unit 432 to execute the process. When the difficult positioning position determination unit 432 determines that the location of the mobile terminal 2 is not the difficult positioning position (No in step S700), the SUPL processing unit 431 ′ follows normal procedures such as creation of assist information. (Step S506).

  On the other hand, when the difficult positioning position determination unit 432 determines that the location of the mobile terminal 2 is the difficult positioning position (Yes in step S700), the SUPL processing unit 431 ′ transmits the SUPL END message to the first server communication. It transmits to the portable terminal 2 via the part 41 (step S528). Then, the SUPL processing unit 431 'ends the SUPL session.

  The SUPL processing unit 431 ′ causes the cell positioning unit 433 to execute the process.

  That is, the cell positioning unit 433 acquires the ID and received radio wave intensity of the surrounding base station 6 from the first server storage unit 42 ′, and stores them in the first server storage unit 42 ′ using the ID and the received radio wave intensity as keys. The corresponding positioning information and error are acquired by referring to the positioning table that has been recorded (step S702). Further, the cell positioning unit 433 sends the position information and error to the first server storage unit 42 ′, and the first server storage unit 42 ′ stores them.

  The SUPL processing unit 431 ′ acquires the position information and error of the mobile terminal 2 from the first server storage unit 42 ′ and transmits it to the inquiry source.

  FIG. 8 is a diagram illustrating an example of an operation sequence of the positioning system 1 ′ when positioning fails in the mobile terminal 2. In this operation sequence, steps S500 to S528 are the same as those shown in FIG.

  After ending the SUPL session, the SUPL processing unit 431 ′ acquires positioning success / failure from the first server storage unit 42 ′ and determines whether positioning has failed. If the positioning has not failed (No in step S800), the SUPL processing unit 431 'ends the process.

  On the other hand, when the positioning has failed (Yes in step S800), the SUPL processing unit 431 'causes the cell positioning unit 433 and the determination list update unit 434 to execute the respective processes.

  That is, the cell positioning unit 433 acquires the ID and received radio wave intensity of the surrounding base station 6 from the first server storage unit 42 ′, and stores them in the first server storage unit 42 ′ using the ID and the received radio wave intensity as keys. The corresponding positioning information and error are acquired by referring to the positioning table that has been recorded (step S702). Further, the cell positioning unit 433 sends the position information and error to the first server storage unit 42 ′, and the first server storage unit 42 ′ stores them.

  The SUPL processing unit 431 ′ acquires the position information and error of the mobile terminal 2 from the first server storage unit 42 ′ and transmits it to the inquiry source.

  On the other hand, the determination list update unit 434 acquires the ID of the base station 6 from the first server storage unit 42 ′, refers to the conversion table stored in the first server storage unit 42 ′ using the ID as a key, Acquire corresponding approximate position information. In addition, the determination list update unit 434 refers to the count table stored in the first server storage unit 42 ′ using the approximate position information as a key, and registers the corresponding position after registration if the corresponding relationship is not registered. The number of failures is incremented (step S802).

  The determination list update unit 434 determines whether the number of positioning failures is greater than a predetermined threshold value. If it is not larger than the predetermined threshold value (No in step S804), the determination list update unit 434 ends the process.

  On the other hand, if it is larger than the predetermined threshold value (Yes in step S804), the determination list update unit 434 deletes the correspondence relationship from the count table stored in the first server storage unit 42 ′, and The approximate position information is registered in the determination list stored in the first server storage unit 42 ′ (step S806).

  As described above, when the location of the mobile terminal 2 is a difficult positioning position, the server-driven positioning is maintained, the AGPS server 4 ′ performs positioning using another positioning method, and the mobile terminal 2 tries positioning. By not doing so, it is possible to minimize the sacrifice of service time.

  In addition, this invention is not limited to the above embodiment. For example, in the first embodiment, the mobile terminal 2 is connected to the wireless LAN positioning server 5 connected to the Internet 9 via the mobile phone network 7, but may be connected via the wireless LAN.

  In the first embodiment, as a positioning method other than GPS, a wireless LAN positioning method, particularly a positioning method based on radio wave reception strength, is used. However, other positioning methods may be used. For example, other wireless LAN positioning methods (positioning method based on access point ID, positioning method based on TDOA (Time Difference of Arrival), etc.), PHS (Personal Handyphone System) positioning method, etc. may be used.

  In the first embodiment, two types of positioning methods are used together, but three or more types of positioning methods may be used together.

  In the second embodiment, a positioning method based on radio wave reception intensity is used as the cell positioning method. However, other cell positioning methods may be used. For example, an extended cell positioning method defined in SUPL 1.0 may be used.

  A computer program for causing a computer to realize the functions of the processing units of the mobile terminal 2, the AGPS servers 4, 4 ′, and the wireless LAN positioning server 5 in the first and second embodiments is a magnetic recording medium, It may be provided in a form recorded on a computer-readable recording medium such as an optical recording medium.

  It should be understood by those skilled in the art that various changes, substitutions, and modifications can be made thereto without departing from the spirit and scope of the present invention.

DESCRIPTION OF SYMBOLS 1, 1 'positioning system 2 Portable terminal 21 Terminal 1st communication part 22 Terminal 2nd communication part 23 GPS part 24 Terminal memory | storage part 25 Operation part 26 Display part 27 Terminal processing part 271 SUPL processing part 272 Wireless LAN positioning part 273 Position information Selection unit 274 Position information encoding unit 3 GPS satellite 4, 4 ′ AGPS server 41 First server communication unit 42, 42 ′ First server storage unit 43, 43 ′ First server processing unit 431, 431 ′ SUPL processing unit 432 Difficulty Positioning position determination unit 433 Cell positioning unit 434 Determination list update unit 5 Wireless LAN positioning server 51 Second server communication unit 52 Second server storage unit 53 Second server processing unit 6 Base station 7 Mobile phone network 8 Gateway 9 Internet 10 Access point 11 Backbone network

Claims (3)

A positioning system having a server and a portable terminal connectable to the server via a network,
The server
A communication unit for communicating with the mobile terminal;
When transmitting a server-driven positioning request to the mobile terminal, when receiving a change request to the terminal-driven positioning from the mobile terminal, a server processing unit that transmits a positioning result transmission request to the mobile terminal;
A storage unit for storing a determination list indicating an approximate position where positioning is difficult;
A difficult positioning position determination unit that determines whether or not the approximate position is a difficult positioning position based on the determination list;
When the approximate location position of the mobile terminal is a difficult positioning position, a server positioning unit that executes a positioning process for specifying the location position of the mobile terminal;
A determination list update unit that updates the determination list so that the approximate location of the mobile terminal is included when positioning on the mobile terminal fails ,
The portable terminal is
A communication unit for communicating with the server;
A terminal positioning unit that executes multiple types of positioning processes;
A selection unit for selecting a positioning result having the smallest error among a plurality of positioning results;
A terminal processing unit that transmits the selected positioning result to the server when the transmission request is received from the server,
A positioning system characterized by that. The server processing unit outputs a positioning result by the portable terminal or the server positioning unit to the outside.
The positioning system according to claim 1 . A positioning method in a positioning system having a server and a portable terminal connectable to the server via a network,
The server, when transmitting a server-driven positioning request to the mobile terminal, when receiving a change request from the mobile terminal to terminal-driven positioning, transmitting a positioning result transmission request to the mobile terminal ;
The portable terminal, when receiving the transmission request from the server, transmitting a message including predetermined information to the server;
The server stores a determination list indicating an approximate position where positioning is difficult, determines whether the approximate position is a difficult positioning position based on the determination list, and the approximate location position of the mobile terminal is a difficult positioning position. Performing a positioning process for specifying the location of the mobile terminal in some cases, and updating the determination list so that the approximate location of the mobile terminal is included when positioning fails on the mobile terminal; ,
Positioning method including .

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