JP2012156849A - Radio terminal device, radio communication system, and control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio terminal device, radio communication system, and control method for enabling confirmation of mutual positional information in real time in a telephone call.SOLUTION: A mobile phone 1a comprises: a positioning request part 33 transmitting request data for location positioning to a mobile phone 1b by using a data burst message which can be transmitted/received during radio call connection with the mobile phone 1b; and a positioning result reception part 37 receiving positioning result data according to the request data from the mobile phone 1b by using a data burst message.

Description

  The present invention relates to a wireless terminal device having a GPS positioning function, a wireless communication system, and a wireless terminal device control method.

  Conventionally, a wireless terminal device may be equipped with a position confirmation function, for example, in order for a parent to search for a child's whereabouts or to identify the position of a target terminal upon receiving an emergency call. This position confirmation function is a one-way service, where a server transmits a position search message to a target terminal, and the server notifies the positioning result of the target terminal that has received the message.

  In addition, in order to acquire the current position information of the wireless terminal device, a positioning service using GPS (Global Positioning System) is provided. In this service, a wireless terminal device often receives assist information for capturing radio waves from a GPS satellite from a predetermined positioning server (for example, PDE; Position Determination Entity) via a base station.

  Under such circumstances, for example, Patent Document 1 proposes a bidirectional position confirmation method using a mail service. This location confirmation method notifies each other's location information by a short message via a location confirmation service center.

JP 2005-184065 A

  However, since the method of Patent Document 1 uses a mail service that cannot be used at the same time as a call, the users cannot check each other's location information in real time during the call. In addition, a location confirmation service center that mediates between terminals, a short message service center, and a positioning server that provides assist information are required depending on the positioning method. Therefore, both terminals must be able to use each service, and these may not be used across communication carriers.

  An object of the present invention is to provide a wireless terminal device, a wireless communication system, and a control method that can confirm each other's position information in real time during a call.

  A wireless terminal device according to the present invention is a wireless terminal device capable of wireless communication with an external terminal, and uses a message that can be transmitted / received during wireless communication with the external terminal to transmit position positioning request data to the external terminal. A positioning request unit for transmitting, and a positioning result receiving unit for receiving positioning result data corresponding to the request data from the external terminal using the message.

  Moreover, it is preferable that the positioning request unit creates the message in a data format compliant with 3GPP2 IS-801.

  The positioning request unit preferably divides the request data so that the message is within a prescribed data length.

  Moreover, it is preferable that the said positioning request | requirement part transmits the positioning assistance information which an own terminal has to the said external terminal as said request data.

  In addition, the wireless terminal device according to the present invention includes the base station and the external terminal that are acquired from the base station location information acquired from the base station and the base station location information acquired by the external terminal from the base station. It is preferable to include an assist information creation unit that calculates an approximate distance to the terminal and creates the positioning assist information based on the calculated approximate distance.

  The assist information creating unit preferably calculates the approximate distance as a predetermined maximum value when the position information of the base station cannot be received from the external terminal.

  In addition, the wireless terminal device according to the present invention includes a positioning unit that measures the position of the terminal itself, and a positioning result transmission unit that transmits the result data measured by the positioning unit to the external terminal using the message. It is preferable.

  The wireless terminal device according to the present invention further includes an assist information receiving unit that receives positioning assistance information held by the external terminal from the external terminal using the message. Of the positioning assistance information possessed and the positioning assistance information received by the assist information receiving unit, it is preferable to use the one with the latest update date and time.

  In addition, the wireless terminal device according to the present invention guides to the position of the external terminal based on the position of the external terminal acquired by the positioning result receiving unit and the position of the own terminal acquired by the positioning unit. It is preferable to provide a guidance unit that performs notification for the purpose of doing so.

  In a wireless communication system including a wireless terminal device according to the present invention and the external terminal, the external terminal includes a notification unit that notifies that the request data has been received.

  Further, when the external terminal receives the request data, the external terminal accepts an operation input as to whether or not to permit transmission of the positioning result data, and only when the operation input to permit is accepted, It is preferable to transmit to the wireless terminal device.

  A wireless terminal device according to the present invention is a wireless terminal device that can wirelessly communicate with an external terminal, and receives position measurement request data from the external terminal using a message that can be transmitted and received during wireless communication with the external terminal. A request receiving unit for receiving, a position positioning unit for performing position positioning upon receiving the request data for position positioning, and a positioning result transmitting unit for transmitting positioning result data for the position positioning to the external terminal using the message And comprising.

  The control method according to the present invention is a method for controlling a wireless terminal device capable of wireless communication with an external terminal, and uses a message that can be transmitted and received during wireless communication with the external terminal to transmit position positioning request data to the external terminal. A positioning request step for transmitting to the terminal; and a positioning result receiving step for receiving positioning result data corresponding to the request data from the external terminal using the message.

  According to the present invention, it is possible to check each other's position information in real time during a call between wireless terminal devices.

1 is an external perspective view of a mobile phone according to an embodiment. It is a block diagram which shows the function of the mobile telephone which concerns on embodiment. It is a figure which shows the example of a screen display in the display part which concerns on embodiment. It is a sequence diagram which shows the flow of a process of the radio | wireless communications system which concerns on embodiment. It is a flowchart which shows the approximate position information acquisition process which concerns on embodiment. It is a flowchart which shows the terminal determination process which concerns on embodiment. It is a flowchart which shows the rough distance calculation process which concerns on embodiment. It is a flowchart which shows the assist information creation process which concerns on embodiment. It is a flowchart which shows the assist information determination process which concerns on embodiment. It is a flowchart which shows the distance calculation process which concerns on embodiment.

  Hereinafter, an example of a preferred embodiment of the present invention will be described. In the present embodiment, a mobile phone 1 will be described as an example of a wireless terminal device and an external terminal.

FIG. 1 is an external perspective view of a mobile phone 1 according to the present embodiment.
FIG. 1 shows a so-called foldable mobile phone, but the mobile phone according to the present invention is not limited to this. For example, a sliding type in which one casing is slid in one direction from a state in which both casings are overlapped, or a rotary type in which one casing is rotated around an axis along the overlapping direction ( Turn type), or a type (straight type) in which the operation unit and the display unit are arranged in one housing and does not have a connecting unit.

  The mobile phone 1 includes an operation unit side body 2 and a display unit side body 3. The operation unit side body 2 includes an operation unit 11 on the front surface unit 10 and a microphone 12 to which a voice uttered by a user of the mobile phone 1 during a call or when using a voice recognition application is input. The The operation unit 11 includes a function setting operation button 13 for activating various functions such as various setting functions, a telephone book function, and a mail function, and an input operation button 14 for inputting numbers of telephone numbers, mail characters, and the like. , And a determination operation button 15 for performing determination and scrolling in various operations.

  The display unit side body 3 includes a display unit 21 for displaying various types of information on the surface unit 20 and a receiver 22 for outputting the voice of the other party of the call.

  Further, the upper end portion of the operation unit side body 2 and the lower end portion of the display unit side body 3 are connected via a hinge mechanism 4. In addition, the mobile phone 1 relatively rotates the operation unit side body 2 and the display unit side body 3 which are connected via the hinge mechanism 4, so that the operation unit side body 2 and the display unit side body 3 are rotated. The body 3 can be in an open state (open state), or the operation unit side body 2 and the display unit side body 3 can be folded (closed state).

FIG. 2 is a block diagram showing functions of the mobile phone 1 according to the present embodiment.
The mobile phone 1 includes an operation unit 11, a display unit 21, a control unit 30, a communication unit 40, a GPS reception unit 50, a voice control unit 60, and a storage unit 70.

  The control unit 30 controls the entire mobile phone 1 and performs predetermined control on each unit such as the display unit 21 and the communication unit 40, for example. In addition, the control unit 30 receives input from the operation unit 11, the communication unit 40, the GPS reception unit 50, and the like, and executes various processes. And the control part 30 controls the memory | storage part 70 in the case of a process execution, reads various programs and data, and writes data. Detailed functions of the control unit 30 according to the present embodiment will be described later.

  The communication unit 40 communicates with an external device (base station) in a predetermined use frequency band (for example, 2 GHz band, 800 MHz band, etc.). Then, the communication unit 40 demodulates the signal received from the main antenna 41, supplies the processed signal to the control unit 30, modulates the signal supplied from the control unit 30, and outputs the signal from the main antenna 41. Send to external device.

  As described above, the communication unit 40 transmits and receives voice data to and from the partner terminal of the voice call via the base station. At this time, the communication unit 40 can transmit and receive various data using a data burst message, a flash with information message, or the like in the access channel or the traffic channel during a voice call connection. Hereinafter, in this embodiment, a data burst message will be described as an example.

  Note that the data length of a message such as a data burst message may be limited depending on the specifications of the communication carrier. Therefore, the control unit 30 determines whether or not the amount of data to be transmitted is within this limit, and when exceeding the limit, divides the transmission data so that the message is within the prescribed data length.

  The GPS receiving unit 50 demodulates a radio signal of a predetermined frequency band from a GPS satellite received by the GPS antenna 51 and supplies the processed signal to the control unit 30. The functions of the GPS receiving unit 50 and the GPS antenna 51 may be performed by the communication unit 40 and the main antenna 41, respectively.

  The sound control unit 60 performs predetermined sound processing on the signal supplied from the communication unit 40 under the control of the control unit 30, and outputs the processed signal to the receiver 22. The receiver 22 outputs the signal supplied from the audio control unit 60 to the outside. This signal may be output from a speaker (not shown) instead of the receiver 22 or together with the receiver 22. In addition, the voice control unit 60 processes the signal input from the microphone 12 according to the control of the control unit 30, and outputs the processed signal to the communication unit 40. The communication unit 40 performs predetermined processing on the signal supplied from the voice control unit 60 and outputs the processed signal from the main antenna 41.

  The storage unit 70 includes, for example, a working memory and is used for arithmetic processing by the control unit 30. In addition to various programs according to this embodiment, GPS positioning results, positioning assist information, and the like are stored.

Next, the function of the control unit 30 will be described in detail.
The control unit 30 includes a positioning unit 31, an assist information creating unit 32, a positioning request unit 33, an assist information receiving unit 34, a notification unit 35, a positioning result transmitting unit 36, a positioning result receiving unit 37, and a guidance. Part 38.

The positioning unit 31 measures the position of the mobile phone 1 by a predetermined positioning method.
Here, as a positioning method for obtaining assist information from the positioning server, there are an Assisted method and a Based method. In the Assisted method, the mobile phone 1 receives satellite acquisition assistance information (Acquisition Assistance data) from the positioning server and searches for GPS satellites. The search result is returned to the positioning server, and position calculation is performed by the positioning server. The mobile phone 1 receives the position calculation result and outputs it as a positioning result. In the Based system, the mobile phone 1 receives satellite information (Ephemeris data and Almanac data) from the base station. The mobile phone 1 creates auxiliary satellite acquisition information based on the received satellite information, searches for the satellite, and further calculates the position itself without transmitting the search result to the positioning server.

  A positioning method that does not acquire assist information from the positioning server includes a stand-alone method. In the standard system, the mobile phone 1 does not communicate with the base station for positioning. That is, the mobile phone 1 decodes the GPS satellite signal and acquires Ephemeris data and Almanac data by itself.

  The positioning unit 31 stores the positioning result in the storage unit 70 and also stores the acquired assist information in the storage unit 70. The stored assist information can be used for the next positioning. Further, in the present embodiment, the assist information creation unit provides the stored assist information to the partner terminal of the voice call.

  Then, the positioning unit 31 performs positioning using the assist information acquired or stored by the terminal itself or the assist information received from the partner terminal by the assist information receiving unit 34. At this time, the positioning unit 31 uses the newest update date among the assist information of the terminal itself and the assist information received by the assist information receiving unit 34.

  First, the assist information creation unit 32 acquires the position information of the base station as the approximate position information of the own terminal by using a system parameter message notified from the base station in which the own terminal is registered. Further, the assist information creating unit 32 receives the position information of the base station acquired from the base station where the partner terminal is registered as a rough position information of the partner terminal by a data burst message. Next, the assist information creation unit 32 calculates an approximate distance between the own terminal and the partner terminal from the approximate position information of the own terminal and the partner terminal.

Then, the assist information creation unit 32 corrects the assist information stored in the storage unit 70 based on the calculated approximate distance, and creates assist information that can be used at the time of positioning at the counterpart terminal. Specifically, for example, as the distance between both terminals increases, the assist information creation unit 32 has a temporal shift corresponding to the distance error. Therefore, the search window size or the like is corrected so as to correct the shift. Set the parameters.
Note that the assist information creating unit 32 may calculate the approximate distance as a predetermined maximum value (for example, 65535 m) when the position information of the base station cannot be received from the counterpart terminal.

  The positioning request unit 33 transmits position positioning request data to the counterpart terminal using the data burst message. The request data includes assist information stored in the storage unit 70 or assist information corrected by the assist information creation unit 32.

  In addition, for example, in the CDMA2000_1x system, the assist information transmitted by the positioning request unit 33 is created in a data format compliant with IS-801 defined in 3GPP2, and for example, “Provide GPS Acquisition Assistance”, “Provide GPS” "Almanac", "Provide GPS Ephemeris". In the case of the W-CDMA system or the LTE (Long Term Evolution) system, the one corresponding to the data format is used.

  The assist information receiving unit 34 receives the assist information stored in the storage unit 70 by the partner terminal or the assist information corrected by the assist information creating unit 32 of the partner terminal from the partner terminal using a data burst message.

  The notification unit 35 notifies the user that position request data has been received from the counterpart terminal. Specifically, the notification unit 35 notifies the user by a predetermined sound, vibration output, or the like in addition to the screen display on the display unit 21.

  The positioning result transmission unit 36 transmits the result data measured by the positioning unit 31 to the counterpart terminal using a data burst message. Here, when receiving the positioning request data from the counterpart terminal, the control unit 30 accepts an operation input as to whether or not to permit transmission of the positioning result data, and only when the permitted operation input is accepted, the positioning unit 31. Then, positioning is executed, and positioning result data is transmitted by the positioning result transmitter 36.

FIG. 3 is a diagram illustrating a screen display example in the display unit 21 according to the present embodiment.
When the mobile phone 1a requesting the location confirmation of the counterpart terminal is in a voice call with the cellular phone 1b (A) and accepts an operation input for the location confirmation, it displays “The partner location is being confirmed” (B), and the positioning result Wait for data to be received.

  Then, the cellular phone 1b displays “Do you want to notify the other party of location information?” (C) and accepts an operation input as to whether or not transmission of positioning result data is permitted. At this time, the control unit 30 of the mobile phone 1b prompts the user to input an operation by outputting a predetermined sound or vibration.

  When the mobile phone 1b permits transmission of the positioning result data, the mobile phone 1a receives the positioning result data and displays the position of the mobile phone 1b (D). The display content may be map information in addition to latitude / longitude information and address information.

  The positioning result receiving unit 37 uses the data burst message to receive the positioning result data measured by the counterpart terminal according to the request data from the counterpart terminal.

  Based on the position of the partner terminal acquired by the positioning result receiving unit 37 and the position of the host terminal acquired by the positioning unit 31, the guiding unit 38 provides notification for guiding the terminal to the position of the partner terminal. Do. Specifically, for example, the guide unit 38 notifies the distance and direction from the partner terminal by using a plurality of types of voices and vibration patterns prepared in advance.

  FIG. 4 is a sequence diagram showing a processing flow of the wireless communication system according to the present embodiment. In this process, the mobile phone 1a and the mobile phone 1b are in a call, and the mobile phone 1a acquires the positioning result of the mobile phone 1b during the call.

  In step S1, the mobile phone 1a first transmits confirmation data to the mobile phone 1b as to whether or not to permit position positioning using a data burst message as part of the position positioning request data.

  In step S2, the mobile phone 1b displays a screen asking the user whether or not position positioning is possible according to the confirmation data received in step S1. When the mobile phone 1b receives an operation input indicating permission from the user, the mobile phone 1b transmits response data indicating permission of position measurement to the mobile phone 1a using a data burst message.

  In step S3, the cellular phone 1a acquires the approximate position information (latitude / longitude information) of the terminal itself through the approximate position information acquisition process (FIG. 5).

  In step S4, the mobile phone 1a is one of the signals for communication with the PDE server defined in IS-801 using the data burst message in order to obtain the approximate location information of the mobile phone 1b. A request signal “Request Pilot Phase Measurement” is transmitted to the mobile phone 1b.

  In step S5, the mobile phone 1b acquires the approximate location information (latitude / longitude information) of the terminal itself by the approximate location information acquisition process (FIG. 5) in response to the message in step S4.

  In step S6, the mobile phone 1b uses a data burst message as a response to the message in step S4, and is also one of the signals for communication with the PDE server specified in IS-801, “Provide Mobile Station”. The signal “Information” and the approximate position information acquired in step S5 are transmitted to the mobile phone 1a.

  In step S <b> 7, the mobile phone 1 a determines whether or not the mobile phone 1 b has the function of the present embodiment, that is, whether or not each of the above-described units in the control unit 30 is performed by the terminal determination process (FIG. 6). Determine.

  In step S8, the mobile phone 1a calculates an approximate distance between the mobile phone 1a and the mobile phone 1b by an approximate distance calculation process (FIG. 7).

  In step S9, the cellular phone 1a creates assist information to be provided to the cellular phone 1b for positioning by an assist information creation process (FIG. 8).

In step S10, the mobile phone 1a uses the data burst message to specify “Provide GPS Acquisition Assistance”, “Provide GPS Almanac”, which is one of the signals for communication with the PDE server defined in IS-801. The assist information created in step S9 is transmitted to the mobile phone 1b as a signal “Provide GPS Ephemeris”.
At this time, the cellular phone 1a also transmits the update date and time of the assist information before correction stored in the storage unit 70.

  In step S <b> 11, the mobile phone 1 a uses the assist information stored in the storage unit 70 to determine the current position of the terminal itself. As the positioning method, a method with high accuracy (for example, the Based method) is selected with priority, and when the positioning process fails, positioning is performed again with another positioning method (for example, the Assisted method).

  In step S12, the mobile phone 1b compares the assist information received from the mobile phone 1a with the assist information stored in the storage unit 70 by the assist information determination process (FIG. 9), and the positioning accuracy is high. Determine high assist information.

  In step S13, the mobile phone 1b measures the current position of the terminal using the assist information determined to have the highest positioning accuracy in step S12. As in step S11, a high-accuracy positioning method (for example, the Based method) is preferentially selected, and when the positioning process fails, the positioning method is again determined by another positioning method (for example, the Assisted method). Is done.

  In step S14, the cellular phone 1b transmits the positioning result data in step S13 to the cellular phone 1a using the data burst message.

  In step S15, the mobile phone 1a calculates a distance from the mobile phone 1b by distance calculation processing (FIG. 10), and further performs notification for guiding to the position of the mobile phone 1b.

FIG. 5 is a flowchart showing approximate position information acquisition processing according to the present embodiment.
In step S <b> 21, the control unit 30 reads from the storage unit 70 the positioning result information of the terminal itself and a database of system parameter messages received from the registered base station. The positioning result information and the system parameter message include the latitude / longitude information of the base station along with the time information.

  In step S22, the control unit 30 determines whether the previous positioning result information is newer than the system parameter message. If this determination is YES, the process proceeds to step S23, and if the determination is NO, the process proceeds to step S24.

  In step S23, the control unit 30 sets the previous positioning result information newer than the system parameter message as the approximate position information.

In step S24, the control unit 30 sets a system parameter message newer than the positioning result information as the approximate position information.
When using the system parameter message, the control unit 30 may set the approximate position information based on the directivity of the antenna of the base station, the electric field strength, and the latitude / longitude information of the neighboring base station. .

FIG. 6 is a flowchart showing terminal determination processing according to the present embodiment.
In step S31, the control unit 30 determines whether or not approximate position information has been received from the partner terminal of the call. If this determination is YES, the process proceeds to step S32. On the other hand, if the determination is NO, the determination is repeated until the wait timer expires. If the determination is not YES, the process proceeds to step S34.

  In step S32, the control unit 30 has received the approximate position information, and thus sets the terminal determination information (flag) to “OK”.

  In step S <b> 33, the control unit 30 stores the received approximate position information in the storage unit 70.

  In step S34, the control unit 30 sets the terminal determination information (flag) as “NG” because it has not received the approximate position information within a predetermined time until the wait timer expires.

FIG. 7 is a flowchart showing an approximate distance calculation process according to the present embodiment.
In step S41, the control unit 30 determines whether or not the terminal determination information set in the terminal determination process (FIG. 6) is “OK”. If this determination is YES, the process proceeds to step S42, and if the determination is NO, the process proceeds to step S44.

  In step S <b> 42, the control unit 30 calculates the distance between the two from the approximate position information of the own terminal and the partner terminal stored in the storage unit 70.

  In step S43, the control unit 30 sets the distance calculated in step S42 as an approximate distance between terminals in a call.

  In step S44, the control unit 30 sets “65535m”, which is the maximum value among predetermined settable values, as the approximate distance between the terminals.

FIG. 8 is a flowchart showing assist information creation processing according to the present embodiment.
In step S51, the control unit 30 determines whether or not Ephemeris data exists in the storage unit 70 of the terminal itself. If this determination is YES, the process proceeds to step S52, and if the determination is NO, the process proceeds to step S53.

  In step S52, the control unit 30 uses the Ephemeris data stored in the storage unit 70 to create assist information to be provided to the counterpart terminal.

  In step S53, the control unit 30 determines whether or not Almanac data exists in the storage unit 70 of the own terminal. If this determination is YES, the process proceeds to step S55, and if the determination is NO, the process proceeds to step S54.

  In step S54, since the assist information is not stored in the storage unit 70 of the terminal itself, the control unit 30 newly performs demodulation and acquires Almanac data for creating assist information.

  In step S55, the control unit 30 uses the Almanac data stored in the storage unit 70 to create assist information to be provided to the counterpart terminal.

  In step S56, the control unit 30 determines whether or not the terminal determination information set in the terminal determination process (FIG. 6) is “OK”. If this determination is YES, the process proceeds to step S57, and if the determination is NO, the process ends.

  In step S57, the control unit 30 determines that the partner terminal can perform GPS positioning using the approximate position information, and converts the created assist information into assist information optimized for the GPS engine used in the partner terminal. .

FIG. 9 is a flowchart showing assist information determination processing according to the present embodiment.
For simplicity, the assist information is described as Ephemeris data or Almanac data.

  In step S61, the control unit 30 determines whether or not assist information (Ephemeris data or Almanac data) is stored in the storage unit 70 of the terminal itself. If this determination is YES, the process proceeds to step S62, and if the determination is NO, the process proceeds to step S63.

  In step S62, the control unit 30 determines the received assist information as assist information with high positioning accuracy, and sets the assist information to be used for GPS positioning.

  In step S63, the control unit 30 determines whether or not Ephemeris data is stored in the storage unit 70 of the terminal itself. If this determination is YES, the process proceeds to step S64, and if the determination is NO, the process proceeds to step S67.

  In step S64, the control unit 30 determines whether or not the received assist information is Almanac data. If this determination is YES, the process proceeds to step S65, and if the determination is NO, the process proceeds to step S62.

  In step S65, the control unit 30 determines whether or not the received assist information is newer than the assist information stored in the storage unit 70 of the terminal itself. If this determination is YES, the process proceeds to step S62, and if the determination is NO, the process proceeds to step S66.

  In step S66, the control unit 30 determines that the Almanac data stored in the storage unit 70 of the terminal itself is assist information with high positioning accuracy, and sets it as assist information used for GPS positioning.

  In step S67, the control unit 30 determines whether or not the received assist information is Ephemeris data. If this determination is YES, the process proceeds to step S68, and if the determination is NO, the process proceeds to step S69.

  In step S68, the control unit 30 determines whether or not the received assist information is newer than the assist information stored in the storage unit 70 of the terminal itself. If this determination is YES, the process proceeds to step S62, and if the determination is NO, the process proceeds to step S69.

  In step S69, the control unit 30 determines that the Ephemeris data stored in the storage unit 70 of the terminal itself is assist information with high positioning accuracy, and sets the assist information used for GPS positioning.

FIG. 10 is a flowchart showing distance calculation processing according to the present embodiment.
In step S71, the control unit 30 calculates the distance between both terminals from the positioning result information of the own terminal and the positioning result information of the counterpart terminal.

  In step S72, the control unit 30 determines whether or not the distance calculated in step S71 is within processing (for example, within 1 km). If this determination is YES, the process proceeds to step S73, and if the determination is NO, the process ends.

  In step S <b> 73, the control unit 30 performs notification for guiding the user to the position of the counterpart terminal by voice output or vibration output.

  In the above processing, the positioning result is notified from the cellular phone 1b to the cellular phone 1a. Similarly, it is naturally possible to notify the positioning result from the cellular phone 1a to the cellular phone 1b.

  Also, the positioning assistance information can be notified not only from the mobile phone 1a to the mobile phone 1b but also from the mobile phone 1b to the mobile phone 1a by the same procedure. In this case, also in the mobile phone 1a, the assist information determination process (FIG. 9) is executed, and the assist information with the highest positioning accuracy is selected.

  As described above, according to the present embodiment, the mobile phone 1 can check each other's location information in real time during a call between terminals by using the data burst message or the flash with information message.

  At this time, since the cellular phone 1 uses the data format compliant with IS-801 of 3GPP2, there is a possibility that the location information can be confirmed without depending on a specific communication carrier. Furthermore, since the mobile phone 1 can divide transmission data even when the message data length is limited, versatility is improved.

  Moreover, since the mobile phone 1 provides assist information held by the mobile terminal to the counterpart terminal, the counterpart terminal does not need to acquire assist information from the positioning server, and the load on the positioning server is reduced. Furthermore, when using a positioning method (for example, the Based method) in which the position calculation is not performed by the positioning server, connection to the positioning server is not necessary.

  At this time, since the mobile phone 1 corrects the assist information based on the approximate distance between the terminals, the availability of the provided assist information is improved. Even when the approximate location information of the partner terminal cannot be obtained and the approximate distance cannot be calculated, for example, the search window size is expanded by setting a predetermined maximum value as the approximate distance, and the mobile phone 1 can Can increase the availability.

  In addition, when the mobile phone 1 receives the assist information from the partner terminal, the assist information of the terminal itself is compared with the update date and time, and the new one is adopted, so the supplementary success rate of the GPS satellite is improved. GPS positioning can be performed efficiently.

  Moreover, since the mobile phone 1 performs notification for guiding the terminal to the partner terminal during a call based on the acquired position information of the partner terminal, the convenience of the user can be improved.

  In addition, since the mobile phone 1 notifies the user of the request when the positioning is requested from the counterpart terminal, the mobile phone 1 automatically suppresses personal information from being output and provides the positioning result. A sense of security can be given to users. Furthermore, since the mobile phone 1 accepts an operation input as to whether or not to permit transmission of the positioning result with this notification, the positioning result can be provided according to the user's intention.

  As mentioned above, although embodiment of this invention was described, this invention is not restricted to embodiment mentioned above. The effects described in the embodiments of the present invention are only the most preferable effects resulting from the present invention, and the effects of the present invention are limited to those described in the embodiments of the present invention. is not.

  For example, the control unit 30 acquires the communication carrier information used by the partner terminal during a call, and converts the assist information into the optimum format used by the GPS engine if the communication carrier is the same as the own terminal. May be provided. Thereby, the GPS positioning process in the counterpart terminal is made efficient. On the other hand, if it is a different telecommunications carrier, the availability is improved by using the standard format.

  Further, the wireless terminal device according to the present invention is not limited to the mobile phone 1. The present invention can be applied to various devices such as a PHS (registered trademark), a personal digital assistant (PDA), a game machine, a navigation device, and a personal computer.

1, 1a, 1b Mobile phone (wireless terminal device)
DESCRIPTION OF SYMBOLS 11 Operation part 21 Display part 30 Control part 31 Positioning part 32 Assist information creation part 33 Positioning request part 34 Assist information receiving part 35 Notification part 36 Positioning result transmission part 37 Positioning result receiving part 38 Guidance part 40 Communication part 41 Main antenna 50 GPS Reception unit 51 GPS antenna 60 Voice control unit 70 Storage unit

Claims (13)

A wireless terminal device capable of wireless communication with an external terminal,
Using a message that can be transmitted and received during a wireless call connection with the external terminal, a positioning request unit that transmits positioning request data to the external terminal;
A wireless terminal device comprising: a positioning result receiving unit that receives positioning result data corresponding to the request data from the external terminal using the message.   2. The wireless terminal device according to claim 1, wherein the positioning request unit creates the message in a data format conforming to 3GPP2 IS-801.   The radio terminal apparatus according to claim 2, wherein the positioning request unit divides the request data so that the message is within a prescribed data length.   The wireless terminal device according to any one of claims 1 to 3, wherein the positioning request unit transmits positioning assistance information held by the terminal itself to the external terminal as the request data.   From the position information of the base station acquired by the own terminal from the base station and the position information of the base station acquired by the external terminal from the base station, an approximate distance between the own terminal and the external terminal is calculated, and the calculation is performed. The wireless terminal device according to claim 4, further comprising an assist information creating unit that creates the positioning assist information based on the estimated distance.   The wireless terminal device according to claim 5, wherein the assist information creating unit calculates the approximate distance as a maximum value among predetermined settable values when location information of a base station cannot be received from the external terminal. A positioning unit that measures the position of the terminal;
The radio | wireless terminal apparatus of any one of Claims 1-6 provided with the positioning result transmission part which transmits the result data measured by the said positioning part to the said external terminal using the said message. A positioning information received by the external terminal is provided from the external terminal using the message, and includes an assist information receiving unit.
The wireless terminal device according to claim 7, wherein the positioning unit uses a positioning assist information that the terminal itself has and a positioning assist information received by the assist information receiving unit that has a newest update date and time.   A guidance unit that performs notification for guiding to the position of the external terminal based on the position of the external terminal acquired by the positioning result receiving unit and the position of the own terminal acquired by the positioning unit. The wireless terminal device according to claim 7 or 8. A wireless communication system having the wireless terminal device according to any one of claims 1 to 9 and the external terminal,
The external communication system includes a notification unit that notifies that the request data has been received.   When the external terminal receives the request data, the external terminal accepts an operation input as to whether or not to permit transmission of the positioning result data. The external terminal receives the positioning result data only when the permitting operation input is accepted. The wireless communication system according to claim 10, wherein the wireless communication system transmits to a device. A wireless terminal device capable of wireless communication with an external terminal,
A request receiving unit that receives position positioning request data from the external terminal using a message that can be transmitted and received during a wireless call connection with the external terminal;
When receiving the positioning request data, a positioning unit that performs positioning;
A positioning result transmission unit that transmits positioning result data of the positioning to the external terminal using the message. A method of controlling a wireless terminal device capable of wireless communication with an external terminal,
Using a message that can be transmitted and received during a wireless call connection with the external terminal, a positioning request step for transmitting position positioning request data to the external terminal;
A positioning result receiving step of receiving positioning result data corresponding to the request data from the external terminal using the message.

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