JP5228400B2 - Portable information terminal, RFID transaction terminal, position specifying method and position specifying program - Google Patents

Description

  The present invention relates to the position specification of a portable information terminal equipped with a GPS function. More specifically, when an RFID chip mounted on a portable information terminal is used for commercial transaction, the position information and write time of the RFID transaction terminal from the RFID transaction terminal This invention relates to a portable information terminal, a position specifying method, and a position specifying program for acquiring assist data including the information and specifying the position of the portable information terminal using the assist data.

  It has become standard to install GPS in mobile phones. And, using this GPS function, services such as displaying a map of the current position, navigating the route to the destination, or confirming the location of the child are provided.

  In general, AGPS (Assisted Global Positioning System) is used for positioning with a mobile phone. In this system, a mobile phone acquires assist data, which is navigation data of GPS satellites, from a mobile phone base station, searches for satellites using this assist data, receives radio waves from the captured satellites, and determines the current position. It is to calculate. FIG. 10 shows a conventional example. First, the GPS assist server 400 stores assist data obtained by receiving radio waves from the GPS satellites 500 and 501. The GPS assist server 400 is connected to the base station 200 of the mobile phone 90 via the network 300. The mobile phone 90 has a GDP function, and when the mobile phone 90 accesses the base station 200 based on a positioning request from the user, the base station 200 acquires assist data from the GPS assist server 400 and transfers it to the mobile phone 90. . At this time, the base station 200 transmits the position information of the base station to the mobile phone 90 in addition to the assist data. When the mobile phone 90 acquires the assist data, the mobile phone 90 captures the GPS satellites 500 and 501 by the GDP function based on the assist data, and receives radio waves from the captured satellite. A positioning calculation is performed from the received radio wave and assist data, and the current position of the mobile phone 90 is obtained. Since the mobile phone 90 can shorten the satellite capture time by using the assist data, the positioning time can be shortened. The assist data includes GPS time information, Doppler information, general orbit information (Almanac Data) of all available satellites, and detailed orbit information (Ephemeris Data) of the satellite in charge of the current position. .

  In addition, an RFID (Radio Frequency Identification) chip (also referred to as an IC tag, an ID tag, or an RF tag) is mounted on a mobile phone. A mobile phone equipped with an RFID chip is also called, for example, “Osaifu Keitai” (registered trademark), and has a wide variety of uses such as electronic money, train tickets, and credit. In this method, identification information stored in an RFID chip is read by an RFID reader of an RFID terminal installed at a store or a station gate, verified against a database, and subjected to commercial transactions. The RFID chip stores identification information and can write information using an RFID writer. For example, it can record points given by a transaction or record transaction history information.

  There are several types of RFID chips, which are roughly classified into an active type in which a power source is built in the chip and a passive type in which no power source is built in. Furthermore, the passive type can be classified according to the frequency used, and the system currently installed in the mobile phone is based on the electromagnetic induction system using a frequency of 13.56 MHz. In this case, the communication distance between the RFID chip and the RFID reader is about several tens of centimeters, and information stored in the RFID chip can be read in a non-contact manner. Also, 900 MHz or 2.45 GHz UHF band RFID chips are beginning to be mounted on mobile phones.

The method for positioning by using the assist data by the mobile phone has been described above, but a method for distributing the assist data has been proposed. In this method, the time when the control station collects assist data from the GPS assist server is the time when a positioning request is received after a predetermined time interval has elapsed from the previous collection time. That is, when a positioning request is received from a communication terminal such as a mobile phone, the stored assist data is transmitted to the communication terminal if the predetermined time has not elapsed, so the communication traffic for collecting the assist data can be reduced. (Patent Document 1).
Patent No. Patent No. 38174244

  As described above, the mobile phone acquires assist data, which is navigation data of GPS satellites, via the base station, captures satellites using the assist data, receives radio waves from the captured satellites, and performs positioning. The current position was obtained by calculation. However, when the user of a mobile phone is in a place where it is difficult to receive radio waves from a satellite such as an underground shopping center, the current position cannot be obtained. In such a case, when obtaining assist data from the base station, the position information of the base station received together with the assist data is regarded as the position information of the mobile phone.

  When the base station position is the position of the mobile phone, since the base station of the mobile phone covers an area of 1.5 to 3 km in radius, the same distance can be considered as the maximum error. In this case, the error is too large, and even if information is obtained as the current position, it cannot be said that it is useful.

  An object of the present invention is to provide a portable information terminal, an RFID transaction terminal, a position specifying method, and a position specifying program capable of specifying a position with high accuracy even when it is in a place where it is difficult to receive radio waves from a satellite. And

The portable information terminal, RFID transaction terminal, position specifying method, and position specifying program of the present invention are configured as follows.
(1) First invention
The first invention will be described with reference to FIG. The portable information terminal of the first invention is equipped with an RFID chip that enables commercial transactions with an RFID transaction terminal based on identification information stored in the RFID chip, and receives a radio wave from a GPS satellite to obtain a current position. , And comprises a first assist data acquisition means 10, a second assist data acquisition means 20, a current position calculation means 30, and a position display means 40.

  The assist data acquisition means 10 is used for positioning calculation acquired from the GPS assist server by the RFID transaction terminal when a commercial transaction is performed with the RFID transaction terminal, the installation position and the writing time of the RFID transaction terminal, and the installation The installation environment information indicating the quality of GPS satellite radio wave reception at the position is written in the RFID chip.

  The second assist data acquisition means acquires assist data from the base station of the portable information terminal.

  Based on the positioning request from the user, the current position calculating means 30 obtains the elapsed time from the current time and the writing time, and when the installation environment information is poor GPS satellite radio wave reception within the predetermined time, the installation is performed. The current position is calculated by the GPS function using the assist data acquired by the first assist data acquisition means when the position is the current position and the installation environment information is good in GPS satellite radio wave reception within the predetermined time. If the elapsed time exceeds the predetermined time, the current position is calculated by the GPS function using the assist data acquired by the second assist data acquiring means.

  The position display means 40 displays the current position obtained by the current position calculation means on the display unit of the portable information terminal.

That is, when the portable information terminal performs some commercial transaction using RFID, assist data is written to the RFID chip by the RFID transaction terminal that has performed the commercial transaction. The RFID transaction terminal is connected to a GPS assist server, and the GPS assist server stores assist data. The GPS assist server transmits assist data to the RFID transaction terminal based on the request of the RFID transaction terminal, and the RFID transaction terminal writes the assist data in the RFID chip of the portable information terminal. The elapsed time is the time from the time when assist data is written by the RFID transaction terminal to the time when a positioning request is received from the user of the portable information terminal.
(2) Second Invention The second invention will be described with reference to FIG. The RFID transaction terminal according to the second aspect of the present invention reads the identification information stored in the RFID chip and conducts a commercial transaction, and is connected via a network to a GPS assist server that stores assist data used for positioning calculation of the portable information terminal. The assist data acquisition means 50 and the assist data writing means 60 are configured.

The assist data acquisition unit 50 acquires assist data from the GPS assist server when the RFID transaction terminal performs a commercial transaction with a portable information terminal equipped with an RFID chip. The assist data writing means 60 includes the assist data acquired by the assist data acquiring means 50, the installation position information of the RFID transaction terminal, the writing time information, and the installation environment information indicating the quality of GPS satellite radio wave reception at the installation position. Is written on the RFID chip.
(3) Third invention In the RFID transaction terminal of the third invention, the assist data acquiring means acquires assist data from the GPS assist server at a predetermined time interval instead of the assist data acquiring means 50 of the second invention. And is stored in the storage unit.
(4) 4th invention The position specifying method of the 4th invention is equipped with an RFID chip that enables commercial transactions with an RFID transaction terminal based on identification information stored in the RFID chip, and receives radio waves from a GPS satellite. This is a method for specifying the current position of a portable information terminal equipped with a GPS function for obtaining the current position.

This location specifying method is based on the assistance data used for the positioning calculation obtained from the GPS assist server by the RFID transaction terminal when the computer of the portable information terminal performs a commercial transaction with the RFID transaction terminal, and the installation position of the RFID transaction terminal. The first assist data acquisition procedure in which the writing environment and the installation environment information indicating the quality of GPS satellite radio wave reception at the installation position are written to the RFID chip, and the second to acquire assist data from the base station of the portable information terminal Based on the assist data acquisition procedure and the positioning request from the user, the elapsed time is calculated from the current time and the writing time, and the installation position is determined when the installation environment information is poor GPS satellite radio wave reception within the predetermined time. Is the current position, the elapsed time is within the predetermined time, and the installation environment information is good for GPS satellite radio wave reception. The current position is calculated by the GPS function using the assist data acquired in the assist data acquisition procedure, and if the elapsed time exceeds a predetermined time, the GPS function is used using the assist data acquired in the second assist data acquisition procedure. This is a method of executing a current position calculation procedure for calculating the current position by the above and a position display procedure for displaying the current position obtained in the current position calculation procedure on the display unit of the portable information terminal.
(5) Fifth Invention The location specifying program of the fifth invention is equipped with an RFID chip that enables commercial transactions with an RFID transaction terminal based on identification information stored in the RFID chip, and receives radio waves from a GPS satellite. This is a position specifying program for a portable information terminal equipped with a GPS function for obtaining the current position.

  This location specifying program is a computer of a portable information terminal, when a business transaction is performed with an RFID transaction terminal, assist data used for positioning calculation obtained from a GPS assist server by the RFID transaction terminal, an installation position of the RFID transaction terminal, and A first assist data acquisition procedure in which writing time and installation environment information indicating the quality of GPS satellite radio wave reception at the installation position are written to the RFID chip; and a second assist data acquisition step from the base station of the portable information terminal Based on the assist data acquisition procedure and the positioning request from the user, the elapsed time is obtained from the current time and the writing time, and the installation environment information is inferior in GPS satellite radio wave reception within the predetermined time. Is the current position, and the installation environment information is good for GPS satellite radio wave reception within an elapse time. The current position is calculated by the GPS function using the assist data acquired in the first assist data acquisition procedure. If the elapsed time exceeds a predetermined time, the assist data acquired in the second assist data acquisition procedure is calculated. This is a program for executing a current position calculation procedure for calculating a current position using the GPS function and a position display procedure for displaying the current position obtained in the current position calculation procedure on the display unit of the portable information terminal.

  As described above, according to the present invention, the following effects can be obtained.

  According to the first invention, the portable information terminal obtains the latest assist data every time it conducts a business transaction using RFID. Therefore, if the elapsed time since the end of the commercial transaction has not passed so much, the last commercial transaction was performed. There is no big error even if the place is the current position. Since the current position thus obtained is not measured, it is possible to provide a portable information terminal that notifies the user of the current position in a very short time. .

  According to the second invention, since the RFID transaction terminal acquires assist data from the GPS assist server every time a commercial transaction is performed, the latest assist data can always be provided to the portable information terminal.

  According to the third invention, since the RFID transaction terminal acquires assist data from the GPS assist server at predetermined time intervals, communication traffic can be leveled.

  4th invention and 5th invention can provide the position specification method and position specification program which can anticipate the effect similar to 1st invention.

An embodiment of a portable information terminal of the present invention will be described with reference to FIGS. Here, a mobile phone will be described as an example of a mobile information terminal, but it may be a PHS (Personal Handyphone System), a PDA (Personal Digital Assistant), or a mobile PC (Personal Computer).

  FIG. 3 shows the concept of the present invention. Compared with FIG. 10 showing the conventional example, the RFID transaction terminal 600 is arranged together with the base station 200, and the mobile phone 100 is equipped with an RFID chip in addition to the GDP function. Is different.

  The RFID transaction terminal 600 is a terminal installed at a gate of a store or a station, and includes an RFID unit 630 including an RFID reader / writer. In the usage method according to the prior art, when the user holds the mobile phone 100 over the RFID unit 630, the identification information stored in the RFID chip is read, and the identification information is transmitted from the RFID transaction terminal 600 to, for example, a settlement server via the network. Settlement processing is performed. In the present invention, in addition to this conventional processing, the RFID transaction terminal 600 is connected to the GDP assist server 400 and acquires assist data from the GDP assist server 400 in the same manner as the base station 200.

  For example, when the mobile phone 100 finishes the settlement process with the RFID transaction terminal 600, the RFID transaction terminal 600 requests the GDP assist server 400 to transmit assist data, and the sent assist data is sent to the RFID chip of the mobile phone 100. Write from the RFID unit 630. At that time, in addition to the assist data, information on the installation position where the RFID transaction terminal 600 is installed, the writing time, and installation environment information indicating whether the radio wave reception of the GPS satellite at the installation position is good or bad are written.

  When the mobile phone 100 performs a positioning operation for knowing the current position after the settlement processing is completed, the mobile phone 100 refers to the acquired assist data and obtains an elapsed time from the acquired time. If the reception of satellite radio waves is poor within a predetermined time, the installation position of the RFID transaction terminal 600 is displayed as the current position. If the satellite radio wave reception is good, the GDP satellites 500 and 501 are captured using the assist data, the current position is calculated from the received radio wave and the assist data, and the obtained current position is displayed. If the predetermined time is exceeded, the assist data is acquired from the base station, the GDP satellites 500 and 501 are captured using the assist data, and positioning is performed using the received radio waves. At this time, if the radio wave reception from the satellite is in a bad place, the position of the base station is inevitably set as the current position.

  Next, configurations of the mobile phone 100 and the RFID transaction terminal 600 will be described with reference to FIGS. 4 and 5.

  FIG. 4 shows the configuration of the mobile phone 100. The mobile phone 100 controls the entire control unit 110, executes a program for positioning and specifying the position, and stores the acquired assist data. A user operates a key to input an input unit 130 that instructs to start a program, a display unit 140 that displays a current position obtained by calculation for a user, and a GPS that receives radio waves from GPS satellites 500 and 501 to obtain a current position Unit 150, radio unit 160 that performs wireless communication with base station 200 and obtains assist data, RFID unit 170 on which an RFID chip is mounted and assist data is written, and power supply unit 180. The GPS unit 150, the radio unit 160, and the RFID unit 170 include dedicated antennas 151, 161, and 171 respectively.

  FIG. 5 shows a configuration of the RFID transaction terminal 600. The RFID transaction terminal 600 executes a control unit 610 for controlling the entire terminal, an application program for writing payment and assist data, and the RFID transaction terminal 600 The identification information is read from the RFID unit 170 of the portable information terminal 100, the memory 620 storing the information of the installed installation location and the installation environment information indicating the quality of GPS satellite radio wave reception at the installation location, or the RFID unit 170 RDID unit 630 for writing assist data and location information, etc., an input unit 640 for store employees, transportation station staff, or maintenance personnel to perform key operations as necessary, and application program progress status or failure for users Display unit 650 for displaying messages and the like, a settlement server (illustrated Not) and GPS assist server 400 and the network communication unit 660 to communicate over the network 300, and constituting the power supply unit 670. The RFID unit 630 includes a dedicated antenna 631 for reading from and writing to the RFID unit 170 of the mobile phone 100.

  Next, a processing flow of the RFID transaction terminal 600 and the portable information terminal 100 will be described.

  FIG. 6 shows a processing flow of the RFID transaction terminal 600, and it is assumed that the RFID transaction terminal 600 is installed in, for example, a store that sells products. When the user holds the portable information terminal 100 over the RFID transaction terminal 600 in order to make a payment for the purchase of the product, the RFID unit 630 of the RFID transaction terminal 600 stores the identification information stored from the RFID unit 170 of the portable information terminal 100. And performs a predetermined settlement process while communicating with the settlement server as required (S100).

  When the settlement process is completed, the GPS assist server 400 is accessed to obtain assist data (S110).

  The portable information terminal 100 uses the acquired assist data, the installation position information and installation environment information of the RFID transaction terminal 600 stored in the memory unit 620, and the time acquired from a time measuring device (not shown) as the writing time. Is written in the RFID section 170 (S120).

Although the processing flow of the RFID transaction terminal 600 ends as described above, the RFID transaction terminal 600 may acquire assist data from the GPS assist server 400 at predetermined time intervals. In this case, the acquired assist data is stored in the memory unit 620 so that the assist data is extracted from the memory unit 620 and written to the RFID unit 170 of the portable information terminal 100 when the settlement process is performed with the portable information terminal 100. Will do.
An example of data written to the RFID unit 170 (data written to the RFID chip from the portable information terminal 100) will be described. FIG. 7 shows an example of the data, which is composed of assist data acquired from the GPS assist server 400 and RFID transaction terminal data unique to the RFID transaction terminal 600. The assist data includes GPS week, GPS time, radio wave delay correction parameter, Almanac Data, and the like. The RFID transaction terminal data is data of entry / exit times in the case of installation classification, installation position, installation environment, and transportation. The installation category is a category in which the place where the RFID transaction terminal 600 is installed is “store” or “station”. The installation position is the position where the RFID transaction terminal 600 is installed, and the installation environment is the reception environment (“good” or “bad”) of the GDP satellite wave at the position where the RFID transaction terminal 600 is installed. The data of the entrance time and the entry time of the transportation means the time when passing through the gate. This time is also the time when the mobile phone 100 acquires assist data (if the installation category is a store, the assist data acquisition time is recorded in the entry time column. The data example in FIG. The time when the terminal 600 is assist data acquired from the GPS assist server 400 at intervals of 5 minutes, for example, and the RFID transaction terminal 600 is installed at the station and written in the RFID chip (also the time when the user passes through the entrance gate). It indicates 15:40:10.

  Next, a processing flow of the mobile phone 100 will be described. FIG. 8 and FIG. 9 show a flow processed by the position specifying program based on some positioning operation from the user of the mobile phone 100. First, the location specifying program refers to assist data including RFID transaction terminal data in the memory unit 120. When the assist data is written in the RFID unit 170, the assist data is fetched from the RFID unit 170 and stored in a predetermined address of the memory unit 120. For example, when the RFID transaction terminal 600 is installed at the entrance / exit gate of a transportation facility, data when the user passes through the entrance gate is first captured (for example, the memory unit 120 is shown in FIG. 7). Store data). Subsequently, when the user passes the entry gate, the data is taken in again. However, in the memory unit 120, other data is rewritten without changing the entry time. As a result, the memory unit 120 stores the entry data including the entry time (S200).

  Subsequently, an elapsed time from the assist data acquisition time is calculated. This calculates the difference between the current time (assuming that the mobile phone 100 has a timing device (not shown)) and the assist data acquisition time (S210).

  If the elapsed time exceeds the predetermined time (T1), it is determined that the assist data is old, the base station is accessed, the assist data is acquired, the GPS satellite is captured based on the assist data, The current position is obtained by receiving the radio wave and displayed on the display unit 140. If radio waves cannot be received, the position of the base station will be the current position. That is, positioning by the conventional method of the mobile phone 100 is performed (S230-S260).

  When the elapsed time is equal to or shorter than the predetermined time (T1), if the installation location is a store and the installation environment is good, positioning using the GDP satellite is performed using assist data acquired from the RFID transaction terminal 600. If the installation environment is bad, the installation position of the RFID transaction terminal 600 is displayed on the display unit 140 as the current position (S270-S290).

  When the elapsed time is equal to or shorter than the predetermined time (T1) and the installation location is a station, the flow shown in FIG. If the installation environment indicating the reception status of the satellite radio waves is good and you have not entered yet, find the elapsed time from the entrance time and the current time, and if it has passed the predetermined time (T2) The current position is obtained by an algorithm using the Doppler effect that is applied to high-speed movement when it is determined that the vehicle is being used. The assist data at this time is obtained from the RFID transaction terminal 600. If the elapsed time from admission is less than or equal to the predetermined time, it is determined that the station is still in the station (not high-speed movement), and positioning by the GDP satellite is performed (S300-S330).

  When the elapsed time is equal to or shorter than the predetermined time (T1) and the installation location is the station and the installation environment is poor, the installation position of the RFID transaction terminal 600 is displayed on the display unit 140 as the current position.

  As described above, the current position can be obtained with high accuracy by using the assist data and the RFID transaction terminal data acquired from the RFID transaction terminal 600.

It is a principle diagram of the first invention. It is a principle diagram of the second invention. It is a positioning method of a mobile phone using the assist data of the present invention. It is a structural example of a mobile phone. It is a structural example of an RFID transaction terminal. It is an example of the processing flow of an RFID transaction terminal. It is an example of data written in an RFID chip. It is a process flow example (the 1) of the position specific program of a mobile telephone. It is a processing flow example (the 2) of the position specific program of a mobile telephone. This is a conventional mobile phone positioning method using assist data.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 1st assist data acquisition means 20 2nd assist data acquisition means 30 Current position calculation means 40 Position display means 50 Assist data acquisition means 60 Assist data writing means 90 Cellular phone 100 Cellular phone 110 Control part 120 Memory 130 Input part 140 Display unit 150 GPS unit 151 GPS antenna 160 Radio unit 161 Radio antenna 170 RFID unit 171 RFID antenna 200 Base station 300 Network 400 GPS assist server 410 GPS assist server antenna 500 GPS satellite 501 GPS satellite 600 RFID transaction terminal 610 Control Unit 620 memory 630 RFID unit 631 RFID antenna 640 input unit 650 display unit 660 network communication unit 670 communication unit

Claims (3)

A portable information terminal equipped with a GPS function for receiving a radio wave from a GPS satellite and obtaining a current position by mounting an RFID chip that enables commercial transactions with an RFID transaction terminal based on identification information stored in the RFID chip,
Assist data used for positioning calculation acquired from a GPS assist server by the RFID transaction terminal when a commercial transaction is performed with the RFID transaction terminal, an installation position and a writing time of the RFID transaction terminal, and a GPS at the installation position First assist data acquisition means for writing installation environment information indicating the quality of satellite radio wave reception on the RFID chip;
Second assist data acquisition means for acquiring assist data from a base station of the portable information terminal;
Based on a positioning request from a user, an elapsed time is obtained from the current time and the writing time, and when the installation environment information is poor GPS satellite radio wave reception within the predetermined time, the installation position is When the installation environment information is good GPS satellite radio wave reception within the predetermined time, the current position is calculated by the GPS function using the assist data acquired by the first assist data acquisition means. A current position calculating means for calculating a current position by the GPS function using the assist data acquired by the second assist data acquiring means if the elapsed time exceeds a predetermined time;
And a position display means for displaying the current position on a display unit of the portable information terminal. Positioning method of portable information terminal equipped with a GPS function for receiving a radio wave from a GPS satellite and obtaining a current position by mounting an RFID chip that enables commercial transactions with an RFID transaction terminal based on identification information stored in the RFID chip Because
A computer of the portable information terminal is
Assist data used for positioning calculation acquired from a GPS assist server by the RFID transaction terminal when a commercial transaction is performed with the RFID transaction terminal, an installation position and a writing time of the RFID transaction terminal, and a GPS at the installation position A first assist data acquisition procedure in which installation environment information indicating the quality of satellite radio wave reception is written to the RFID chip;
A second assist data acquisition procedure for acquiring assist data from a base station of the portable information terminal;
Based on a positioning request from a user, an elapsed time is obtained from the current time and the writing time, and when the installation environment information is poor GPS satellite radio wave reception within the predetermined time, the installation position is And the GPS function is used to calculate the current position using the assist data acquired in the first assist data acquisition procedure when the installation environment information is good GPS satellite radio wave reception within the predetermined time. A current position calculation procedure for calculating the current position by the GPS function using the assist data acquired in the second assist data acquisition procedure if the elapsed time exceeds a predetermined time;
A position display procedure for displaying the current position on the display unit of the portable information terminal;
The position specifying method characterized by performing. Positioning program for a portable information terminal equipped with a GPS function for receiving a radio wave from a GPS satellite and obtaining a current position by mounting an RFID chip that enables commercial transactions with an RFID transaction terminal based on identification information stored in the RFID chip Because
When a business transaction is performed with the RFID transaction terminal on the computer of the portable information terminal, assist data used for positioning calculation acquired from the GPS assist server by the RFID transaction terminal, an installation position of the RFID transaction terminal, and a writing time And a first assist data acquisition procedure in which installation environment information indicating the quality of GPS satellite radio wave reception at the installation position is written to the RFID chip;
A second assist data acquisition procedure for acquiring assist data from a base station of the portable information terminal;
Based on a positioning request from a user, an elapsed time is obtained from the current time and the writing time, and when the installation environment information is poor GPS satellite radio wave reception within the predetermined time, the installation position is And the GPS function is used to calculate the current position using the assist data acquired in the first assist data acquisition procedure when the installation environment information is good GPS satellite radio wave reception within the predetermined time. A current position calculation procedure for calculating the current position by the GPS function using the assist data acquired in the second assist data acquisition procedure if the elapsed time exceeds a predetermined time;
A position display procedure for displaying the current position on the display unit of the portable information terminal;
Positioning program to execute.

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