JP2013083499A - Mobile terminal and current position discrimination method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide technology for acquiring an exact current position with a mobile terminal by using a satellite positioning signal obtained by satellite positioning and a position information signal received indoors.SOLUTION: A mobile terminal includes: a current position determination part 8 for determining, when only an absolute position is output from a signal processing part 7, the absolute position as a current position, determining the current position by predetermined arithmetic processing when a plurality of pieces of position information are output from the signal processing part 7, preferentially determining, when the position information and the absolute position are output from the signal processing part 7, the position information as the current position, and determining, when nothing is output from the signal processing part 7, the positioning information as the latest current position; and a map information output part 9 which calls corresponding map information from a map information storage part which stores map information corresponding to an output result of the current position determination part 8 to be output. The current position is inserted into output from the map information output part 9 to be displayed on a display part 10.

Description

  The present invention relates to a mobile terminal and a current position determination method that can determine the current position of an outdoor and an indoor area using a positioning satellite and a ground position information transmitter, and can accurately grasp its current position. .

  A satellite positioning system such as GPS (Global Positioning System) is used as means for specifying the current position in a mobile terminal. However, in the satellite positioning system indoors, behind buildings, etc., radio signals transmitted from positioning satellites (hereinafter referred to as “satellite positioning signals”) are unreceivable or deteriorated signals, resulting in a decrease in positioning accuracy. Or, positioning becomes impossible and it becomes difficult for the user of the mobile terminal to accurately grasp the current location.

  As a solution to this problem, for example, Patent Document 1 discloses a frequency (for example, a center frequency) that uses position information, which is information indicating a position, in an area where a satellite positioning signal cannot be received, such as indoors and underground malls. 1.57542 GHz), modulation system (specifically, BPSK (Binary Phase-Shift Keying)), multiple access system (specifically, CDMA (Code Division Multiple Access) of direct spread spectrum system), etc. A technology that installs a location information transmitter that transmits a certain signal (hereinafter referred to as a “location information signal”) and acquires its current location from a location information signal received by a communication terminal such as a mobile phone. Is disclosed.

JP 2007-278756 A

  In the prior art such as Patent Document 1 described above, outdoor and indoor positions are determined based on signal strength as a method of accurately providing own position information to a user of a mobile terminal. In such a position determination method, the accuracy of the satellite positioning signal is deteriorated because the absolute position of the satellite positioning outdoors using the satellite positioning signal is affected by a shield such as a building. Therefore, the error of the calculated absolute position also increases, and it is difficult to provide accurate position information to the user.

  When a plurality of position information signals are obtained indoors, the current position is determined based on the strength of the position information signal. Further, when the intensity of the position information signal is the same, the position information signal is determined by deriving an arithmetic sum of the data.

  However, since the intensity of the position information signal varies depending on the indoor positioning environment, the position information signal having the strongest intensity is not always the current position.

  Therefore, a typical object of the present invention is to provide a technique for acquiring an accurate current position with a mobile terminal using a satellite positioning signal obtained by satellite positioning and a position information signal received indoors. .

  The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

  Of the inventions disclosed in the present application, the outline of typical ones will be briefly described as follows.

  A representative mobile terminal of the present invention includes an antenna unit for receiving a radio signal including each position information transmitted by a plurality of position information transmitters and an absolute position transmitted by a positioning satellite. A signal processing unit for performing signal processing to separate and extract the position information received by the antenna unit and the absolute position, and when only the absolute position is output from the signal processing unit, When a plurality of pieces of position information are output from the signal processing unit, a current position is determined by a predetermined calculation process, and when the position information and the absolute position are output from the signal processing unit The position information is preferentially determined as the current position, and if nothing is output from the signal processing unit, the current position determination unit for determining the current position recently and the output result of the current position determination unit Corresponding map information is stored in the map information storage unit storing the corresponding map information, and the map information output unit outputs the current position by inserting the current position into the map information, and outputs from the map information output unit. A display unit for displaying.

  More preferably, in the mobile terminal, the map information displayed on the display unit displays an outdoor map representing the outdoors in the case of the absolute position, and an indoor map in the case of the position information. .

  More preferably, the mobile terminal further includes a voice / guide information output unit for providing guidance information corresponding to the current position.

  Further, a representative current position determination method of the present invention is for receiving a radio signal including each position information transmitted by a plurality of position information transmitters and an absolute position transmitted by a positioning artificial satellite. An antenna unit, a signal processing unit for performing signal processing to separate and extract the position information and the absolute position received by the antenna unit, and a current position based on the content of output information from the signal processing unit A current position determination method for a mobile terminal comprising a current position determination unit for determining the current position when the absolute position is output from the signal processing unit. The current position is displayed on the map, and when a plurality of the position information is output from the signal processing unit, the current position is determined by a predetermined calculation process, and the current position is displayed on the map. Let When the position information and the absolute position are output from the signal processing unit, the position information is preferentially determined as the current position, the current position is displayed on the map, and nothing is output from the signal processing unit. If not, it is determined that the current position is the latest and the current position is displayed on the map.

  Among the inventions disclosed in the present application, effects obtained by typical ones will be briefly described as follows.

  According to a representative mobile terminal of the present invention, it is possible to provide a technique for acquiring an accurate current position in a mobile terminal using a satellite positioning signal obtained by satellite positioning and a position information signal received indoors. Can do.

It is a figure which shows an example of the whole structure of the mobile terminal by this Embodiment. It is a figure which shows an example of the signal processing of the present position determination part by this Embodiment. It is a figure which shows an example which determines a present position from the positional information by this Embodiment.

  Hereinafter, an embodiment for carrying out the present invention will be described in detail with reference to FIG.

  The mobile terminal 1 of the present embodiment includes an antenna unit 6, a signal processing unit 7, a current position determination unit 8, a map information output unit 9, a display unit 10, a voice / guide information output unit 13, It consists of a current position database 14 and a sound generator 16.

  In addition, as a member constituting the environment for the mobile terminal 1 to operate, positioning artificial satellite 2, satellite positioning information 3, position information transmitter 4, position information signal 5, indoor map database 11 and The outdoor map database 12 and the guide database 15 are configured.

  In the above configuration, the satellite positioning information 3 is always transmitted from the positioning artificial satellite 2. Similarly, a position information signal 5 is always transmitted from the position information transmitter 4 installed on the ground. The satellite positioning information 3 and the position information signal 5 are similar radio signals, including latitude, longitude, time information, and the like, and both can be received by the antenna unit 6 provided in the mobile terminal 1. The signal received by the antenna unit 6, that is, the satellite positioning information 3 or the position information signal 5 is demodulated by the signal processing unit 7, and the current position information contained therein is extracted. This current position information is input to the current position determination unit 8 to determine the current position including the latitude and longitude of the mobile terminal 1. The determined current position information is stored in the current position database 14.

  The current position information is input from the current position determination unit 8 to the map information output unit 9. A corresponding map is read from the indoor map database 11 or the outdoor map database 12 according to the input current position information, and a map indicating the current position of the mobile terminal 1 is displayed on the display unit 10. When the position information signal 5 is determined as the current position in the current position determination unit 8, this map display is displayed by inserting the current position on the indoor map stored in the indoor map database 11 on the display unit 10. On the other hand, when the satellite positioning information 3 is determined as the current position, the current position is inserted and displayed at a corresponding location on the outdoor map stored in the outdoor map database 12.

  The current position information output from the current position determination unit 8 is output to the voice / guide information output unit 13. The voice / guide information output unit 13 accesses the guide database 15 according to the input current position information. Then, voice and guide information, which is information corresponding to (associated with or associated with) the current position information, is read, and the voice / guide information is provided to the voice generation unit 16 such as a speaker and the display unit 10. The contents are contents such as information on restaurants and coupons that can be used at the current position of the mobile terminal 1, the presence or absence of coin parking, and full vehicle information. Such information is performed by voice and image display.

  The signal processing unit 7 can output the satellite positioning information 3 and the position information signal 5 at the same time or only one at regular time intervals, and can receive a plurality of position information signals 5 and output a plurality of position information. And

  The indoor map database 11, the outdoor map database 12, and the guide database 15 are not necessarily provided outside the mobile terminal 1. Data may be written in a non-volatile memory or the like, and a database may be configured and incorporated in the mobile terminal 1. When it is desired to provide a database outside, the mobile terminal 1 is provided with a network connection means for connecting to a network such as the Internet. If necessary, an external database may be accessed to download necessary data.

  Next, information processing on the satellite positioning information 3 and the position information signal 5 input to the current position determination unit 8 will be described with reference to FIG.

  First, the position information signal 5 is output from the signal processing unit 7 shown in FIG. 1 to the current position determination unit 8 (step S1). Next, when the position information signal is not (NO) other than the position information signal 5 in step S2, it is next determined whether or not the satellite positioning signal 3 is received (step S4). If NO is determined in this step S4, the current position determination unit 8 stores the current position data that is temporally recent in the current position database 14 as the current position (steps S8 and S9). The stored current position is output to the map information output unit 10 and the voice / guide information output unit 13 (step S10).

  On the other hand, if it is determined in step S4 that the satellite positioning information 3 is (YES), it is determined as position information by recognizing it as an absolute position based on the coordinate information included in the received signal (step S7). The current position is stored in the current position database 14 (step S9), and the stored current position is output to the map information output unit 10 and the voice / guide information output unit 13 (step S10).

  If it is determined in step S2 that it is position information signal 5 (YES), it is determined whether or not there is one signal received in step S3. Here, if there is a plurality instead of one, it is determined as NO and the process proceeds to step S6. In step S6, the current position of the mobile terminal 1 is determined by a predetermined calculation from the plurality of position information signals 5. The current position is stored in the current position database 14 (step S9), and the stored current position is output to the map information output unit 10 and the voice / guide information output unit 13 (step S10).

  On the other hand, if it is determined that there is only one signal received in step S3 (YES), the received position information signal 5 is determined as the current position of the mobile terminal 1 (step S5). The current position is stored in the current position database 14 (step S9), and the stored current position is output to the map information output unit 10 and the voice / guide information output unit 13 (step S10).

  As described above, the mobile terminal 1 according to the present embodiment receives the satellite positioning information 3 and the position information signal 5 including the position information transmitted by the plurality of position information transmitters 4 and the positioning artificial satellite 2. The mobile terminal 1 having the antenna unit 6 includes a signal processing unit 7 for performing signal processing for extracting position information included in a radio signal received by the antenna unit 6.

  When only the satellite positioning information 3 is output as the content of the output information from the signal processing unit 7, this is determined as the current position, and this current position is displayed on the map. When a plurality of position information signals 5 are output from the signal processing unit 7, the current position is determined by a predetermined calculation process, and the current position is displayed on the map. When the position information signal 5 and the satellite positioning information 3 are output from the signal processing unit 7, the position information signal 5 is preferentially determined as the current position, and the current position is displayed on the map. When nothing is output from the signal processing unit 7, it is determined that the current position is the latest, and a current position determination unit 8 that displays this current position on a map is provided.

  Further, a map information output unit 9 that calls and outputs corresponding map information from a map information storage unit (indoor map database 11, outdoor map database 12) that stores map information corresponding to the output result of the current position determination unit 8. A display unit 10 for displaying the output from the voice and a voice generation unit 16 for outputting the output from the voice / guide information output unit 13 as a voice.

  Further, the map displayed on the display unit 10 displays an outdoor map indicating the outdoors in the case of position information transmitted from the positioning satellite 2, and indoors in the case of position information transmitted from the position information transmitter 4. Display a map.

  In addition, a voice / guide information output unit 13 is provided, and the current position is output by voice by the voice generation unit 16 to execute voice guidance, and guidance information display corresponding to the current position is displayed on the display unit 10.

  Next, referring to FIG. 3, a plurality of position information transmitters “A”, “B”, and “C” each transmit a position information signal 5. Each position information signal includes different position information. In this environment, when the mobile terminal 1 is located within the radio wave transmission area of the position information transmitter “A”, the output of the signal processing unit 7 outputs the position information “A”, and the current position determination unit 8 Also outputs “A”. That is, it can be seen that the mobile terminal 1 is located within the transmission area of the location information transmitter A.

  Next, when the mobile terminal 1 moves and does not enter any of the location information transmitters A to C, there is no output from the signal processing unit 7. Therefore, “A” which is the latest position information is input to the current position determination unit 8, and “A” is output as the latest position information of the mobile terminal 1.

  Next, when the mobile terminal 1 is moved to a place where the radio wave transmission areas of the location information transmitter B and the location information transmitter C overlap, the output of the signal processing unit 7 is “B”, “C”. Thus, a predetermined calculation (B + C) / 2 is executed in the current position determination unit 8. That is, it can be seen that the mobile terminal 1 is located at an intermediate point between the location information transmitter B and the location information transmitter C.

  Thus, in the area where position information cannot be acquired, the current position can be determined by storing past current position data. When the position information B and the position information C are received at the same time, the current position can be specified by calculating the center of gravity of the area regardless of the strength of the received signal.

  As described above, according to the present embodiment, when the absolute position by satellite positioning and the position information by the position information signal 5 from the position information transmitter 4 are received simultaneously, the position information is given priority as the current position. By determining, it is possible to provide the user of the mobile terminal 1 with information on the current position with a reduced position error.

  Further, when a plurality of pieces of position information based on the position information signal 5 from the position information transmitter 4 are received at the same time, information on the latest current position is stored. The present position can be determined and accurate position information can be provided.

  Further, it is possible to provide a technique for acquiring an accurate current position by a mobile terminal using a satellite positioning signal obtained by satellite positioning and a position information signal received indoors.

  In addition, according to the present embodiment, the current position is given priority to the position information obtained from the position information transmitter in an environment where the accuracy of satellite positioning is reduced, thereby displaying an accurate current position to the user, Guides and navigation can be implemented.

  As mentioned above, the invention made by the present inventor has been specifically described based on the embodiment. However, the present invention is not limited to the embodiment, and various modifications can be made without departing from the scope of the invention. Needless to say.

  INDUSTRIAL APPLICABILITY The present invention can be used for a mobile terminal that can determine the current position of the outdoors and indoors by using a positioning satellite and a ground position information transmitter, and can accurately grasp the current position of itself.

1 Mobile terminal 2 Satellite for positioning 3 Satellite positioning information (absolute position)
4 Location information transmitter 5 Location information signal (location information)
6 Antenna unit 7 Signal processing unit 8 Current position determination unit 9 Map information output unit 10 Display unit 11 Indoor map database (map information storage unit)
12 Outdoor map database (map information storage unit)
13 Voice / Guide Information Output Unit 14 Current Position Database 15 Guide Database 16 Voice Generator

Claims (4)

An antenna unit for receiving a radio signal including each position information transmitted by a plurality of position information transmitters and an absolute position transmitted by a positioning satellite;
A signal processing unit for performing signal processing for separating and extracting the position information and the absolute position received by the antenna unit;
When only the absolute position is output from the signal processing unit, this is determined as the current position, and when a plurality of the position information is output from the signal processing unit, the current position is determined by a predetermined calculation process, When the position information and the absolute position are output from the signal processing unit, the position information is preferentially determined as the current position, and when nothing is output from the signal processing unit, it is determined as the latest current position. Current position determination unit for,
A map information output unit that calls the corresponding map information from the map information storage unit that stores the map information corresponding to the output result of the current position determination unit, inserts the current position into the map information, and outputs the map information;
A display unit for displaying the output from the map information output unit;
A mobile terminal comprising: The mobile terminal according to claim 1, wherein
The map displayed on the display unit is:
In the case of the absolute position, an outdoor map showing the outdoors is displayed,
In the case of the location information, an indoor map is displayed. The mobile terminal according to claim 1, wherein
A mobile terminal comprising a voice / guide information output unit for providing guide information corresponding to the current position. An antenna unit for receiving a radio signal including each position information transmitted by a plurality of position information transmitters and an absolute position transmitted by a positioning satellite;
A signal processing unit for performing signal processing for separating and extracting the position information and the absolute position received by the antenna unit;
A current position determination method for a mobile terminal comprising a current position determination unit that determines a current position based on the content of output information from the signal processing unit,
The current position determination unit determines that only the absolute position is output from the signal processing unit as a current position, displays the current position on a map, and outputs a plurality of the positions from the signal processing unit. When the information is output, the current position is determined by a predetermined calculation process, the current position is displayed on a map, and the position information and the absolute position are output from the signal processing unit. Is determined as the current position, and this current position is displayed on the map. If nothing is output from the signal processing unit, the current position is determined as the most recent, and the current position is displayed on the map. A current position determination method characterized by:

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