JP2014044208A - Communication device and positioning method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication device, a communication system, a positioning method, and a positioning program for solving the problem that duration time of a battery of the communication device becomes short.SOLUTION: A communication device 91 comprises: a positioning unit 11 for measuring a position by using assist data containing navigation data of a satellite 93 from a base station 92; and a communication unit 12, which finishes communication between the device and the base station 92 before the positioning unit 11 finishes measuring the position, when the device acquires the assist data and outputs the assist data to the positioning unit 11. Additionally, the communication device 91 comprises a CPU 13, and executes a positioning program of the communication device related to this embodiment.

Description

  The present invention relates to a communication device, a communication system, a positioning method, and a positioning program, and more particularly, to a GNSS (Global Navigation Satellite System) that measures a position using assist data.

  In recent years, an assisted GPS (Global Positioning System) system using a communication function of a mobile phone has been used. The assisted GPS system enables high-speed positioning with high sensitivity by receiving assist data including satellite information such as a navigation message from a base station and positioning using the assist data.

  An example of a communication device with a positioning function is described in Patent Documents 1 and 2. The communication device of Patent Document 1 includes a communication unit, a position calculation unit, and a communication start determination unit, and operates as follows. The communication unit receives satellite information from the base station. A position calculating part measures the position of a communication apparatus using the satellite information which a communication part acquires. The communication start determination unit determines whether or not it is necessary to acquire the latest satellite information, and causes the communication unit to start communication only when it is necessary to acquire the latest satellite information.

  The communication device of Patent Document 2 includes an assist signal receiving unit, a position detecting unit, and a GPS engine, and operates as follows. The position detection means operates the GPS engine to detect the position of the terminal device. The position detecting means continues to detect the current position until the mobile phone arrives in the vicinity of the nearest station of transportation, and turns off the power of the GPS engine when the mobile phone arrives in the vicinity of the nearest station of transportation. When the mobile phone approaches the arrival station of transportation, the GPS engine is turned on.

JP 2003-344522 A JP 2007-187620 A

  In the communication device described in Patent Document 1 described above, when it is necessary to acquire the latest satellite information, the communication unit and the position calculation unit consume power while the communication device is positioning. There was a problem that the battery life of the device was shortened.

  In the communication device described in Patent Document 2, the assist signal receiving means, the position detecting means, and the GPS engine consume power until the mobile phone arrives in the vicinity of the nearest station of transportation. There was a problem that the holding time was shortened.

  An object of the present invention is to provide a communication device, a communication system, a positioning method, and a positioning program that solve the above-described problem that the battery life of the communication device is shortened.

  In order to achieve the above object, a communication device according to the present invention includes a positioning unit that measures a position using assist data including satellite navigation data from a base station, and obtains the assist data and outputs the assist data to the positioning unit. A communication unit that terminates communication with the base station before the positioning unit finishes positioning.

  In order to achieve the above object, a communication system of the present invention includes the communication apparatus of the present invention and a base station.

  To achieve the above object, a positioning method of a communication device according to the present invention includes an assist data notification procedure for notifying a communication device of assist data including satellite navigation data from a base station, and between the base station and the communication device. A communication end procedure for ending communication, a communication result procedure for resuming communication between the base station and the communication device, and notifying the position of the communication device measured by the communication device to the base station, In order.

  In order to achieve the above object, the positioning program of the communication device of the present invention terminates the communication with the base station and the assist data acquisition step of acquiring the assist data including the navigation data of the satellite from the base station. A communication end step for resuming communication with the base station, and a positioning result transmission step for transmitting the position of the communication device measured using the assist data to the base station.

  According to the present invention, the battery life of a communication device can be extended.

1 is a schematic configuration diagram of a communication system according to Embodiments 1 and 2. FIG. An example of the positioning method of the communication apparatus which concerns on Embodiment 1 and 2 is shown. An example of the positioning program of the communication apparatus which concerns on Embodiment 1 and 2 is shown. An example of specific operations of the communication apparatus and the base station is shown. An example of the positioning method of the communication apparatus which concerns on Embodiment 3 is shown. An example of the positioning program of the communication apparatus which concerns on Embodiment 3 is shown. An example of specific operations of the communication apparatus and the base station is shown.

  Embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments described below are examples of the present invention, and the present invention is not limited to the following embodiments. In the present specification and drawings, the same reference numerals denote the same components.

(Embodiment 1)
FIG. 1 is a schematic configuration diagram of a communication system according to the present embodiment. The communication system according to the present embodiment includes a communication device 81 and a base station 92, and executes the positioning method of the communication device 81 according to the present embodiment.

  FIG. 2 shows an example of a positioning method of the communication device according to the present embodiment. The positioning method 110 of the communication apparatus according to the present embodiment includes an assist data notification procedure S113, a communication end procedure S115, and a positioning result notification procedure S124 in this order. In the assist data notification procedure S113, assist data including navigation data of the satellite 93 is notified from the base station 92 to the communication device 81. In the communication end procedure S115, the communication between the base station 92 and the communication device 81 is ended. Thereafter, the positioning of the communication device 81 ends. In the positioning result notification procedure S124, communication between the base station 92 and the communication device 81 is resumed, and the position of the communication device 81 measured by the communication device 81 is notified to the base station 92.

  For example, the communication device 81 illustrated in FIG. 1 includes a positioning unit 11 and a communication unit 12 and operates as follows. When the communication unit 12 acquires assist data from the base station 92 and outputs the assist data to the positioning unit 11, the communication unit 12 ends the communication with the base station 92 before the positioning unit 11 finishes positioning. The positioning unit 11 measures the position using assist data including navigation data of the satellite 93 from the base station 92. The positioning unit 11 measures the position of the communication device 81 using, for example, an assisted GPS method. Thereafter, when the positioning unit 11 finishes positioning the position of the communication device 81, the communication unit 12 resumes communication with the base station 92 and transmits the positioning result of the positioning unit 11 to the base station 92.

  When the communication device 81 further includes the CPU unit 13 illustrated in FIG. 1, the communication device 81 may cause the CPU unit 13 to execute a positioning program for the communication device. FIG. 3 shows an example of a positioning program for the communication apparatus according to the present embodiment. The positioning program 210 of the communication device includes assist data acquisition step S213 for acquiring assist data including navigation data of the satellite 93 from the base station 92, communication end step S215 for ending communication with the base station 92, Communication with the station 92 is resumed, and a positioning result transmission step S224 for transmitting the position of the communication device 81 measured using the assist data to the base station 92 is sequentially executed by the computer. By executing the positioning program of the communication device, the same effect as that of the communication device 81 can be obtained.

The communication device 81 has the above-described configuration, and the position of the communication device 81 can be measured by executing the communication device positioning method according to the present embodiment. Here, when the communication unit 12 acquires assist data, the communication session is released at the earliest possible timing. Since the communication device 81 can shorten the communication time with the base station 92 and reduce the power consumption of the communication unit 12 during positioning by the positioning unit 11, the battery life of the communication device can be extended.
(Embodiment 2)
FIG. 1 is a schematic configuration diagram of a communication system according to the present embodiment. The communication system according to the present embodiment includes a communication device 91 and a base station 92, and executes the positioning method of the communication device 91 according to the present embodiment.

  FIG. 2 shows an example of a positioning method of the communication device according to the present embodiment. The positioning method of the communication apparatus according to the present embodiment includes an assist data notification procedure S113, a communication end procedure S115, and a positioning result notification procedure S124 in this order. In the assist data notification procedure S113, assist data including navigation data of the satellite 93 is notified from the base station 92 to the communication device 91. In the communication end procedure S115, the communication between the base station 92 and the communication device 91 is ended. Thereafter, the positioning of the communication device 91 ends. In the positioning result notification procedure S124, communication between the base station 92 and the communication device 91 is resumed, and the position of the communication device 91 measured by the communication device 91 is notified to the base station 92.

  For example, the communication device 91 illustrated in FIG. 1 includes a positioning unit 11 and a communication unit 12 and operates as follows. When the communication unit 12 acquires assist data from the base station 92 and outputs the assist data to the positioning unit 11, the communication unit 12 ends the communication with the base station 92 before the positioning unit 11 finishes positioning. The positioning unit 11 measures the position using assist data including navigation data of the satellite 93 from the base station 92. The positioning unit 11 measures the position of the communication device 91 using, for example, an assisted GPS method. Thereafter, when the positioning unit 11 finishes positioning the position of the communication device 91, the communication unit 12 resumes communication with the base station 92 and transmits the positioning result of the positioning unit 11 to the base station 92.

  The communication device positioning method according to the present embodiment shown in FIG. 2 further includes a calculation start procedure S136 for starting positioning using assist data in the communication device 91 between the communication end procedure S115 and the positioning result notification procedure S124. . In this case, the positioning unit 11 illustrated in FIG. 1 starts positioning of the position of the communication device 91 using the assist data acquired by the communication unit 12 after the communication unit 12 ends communication with the base station 92.

  The communication device 91 may include the CPU unit 13 illustrated in FIG. 1 and cause the CPU unit 13 to execute a positioning program for the communication device. FIG. 3 shows an example of a positioning program for the communication apparatus according to the present embodiment. The positioning program of the communication device includes assist data acquisition step S213 for acquiring assist data including navigation data of the satellite 93 from the base station 92, communication end step S215 for ending communication with the base station 92, and the base station. The communication with the terminal 92 is resumed, and a positioning result transmission step S224 for transmitting the position of the communication device 91 measured using the assist data to the base station 92 is sequentially executed by the computer. By executing the positioning program of the communication device, it is possible to obtain the same effect as when the communication device 91 has the above configuration. In this embodiment, between the communication end step S215 and the positioning result transmission step S224, the computer is further caused to execute a calculation start step S236 for starting positioning of the position of the communication device 91 using the assist data.

  The communication device 91 has the above-described configuration, and the position of the communication device 91 can be measured by executing the communication device positioning method according to the present embodiment. Here, when the communication unit 12 acquires assist data, the communication session is released at the earliest possible timing. Since the communication device 91 can shorten the communication time with the base station 92 and reduce the power consumption of the communication unit 12 during positioning by the positioning unit 11, the battery life of the communication device can be extended.

FIG. 4 shows an example of specific operations of the communication apparatus and the base station.
In step S110, the communication device 91 starts positioning.
In step S111, the communication device 91 and the base station 92 establish a communication session and start communication.
In step S112, the communication device 91 requests assist data.
In step S113, the base station 92 notifies the communication device 91 of assist data.

In step S <b> 114, the positioning unit of the communication device 91 calculates the approximate position of the communication device 91 using the assist data acquired by the communication unit 12. Then, the communication unit of the communication device 91 transmits the approximate position calculated by the positioning unit to the base station 92. Thereby, the communication session between the communication device 91 and the base station 92 can be released.
In step S115, the communication with the base station 92 is terminated.

  Here, the approximate position is information that can open a communication session. For example, the initial position of the communication device 91 included in the assist data, a pseudo position stored in advance in the communication device 91, or an approximate position calculated from the assist data.

  Since the approximate position is the initial position included in the assist data, communication can be promptly terminated after obtaining the assist data. Since the approximate position is a pseudo position stored in advance in the communication device 91, the communication can be promptly terminated without extracting the initial position from the assist data. Since the approximate position is an approximate position calculated from the assist data, position information closer to the actual position of the communication device 91 can be notified to the base station 92.

Next, in step S116, the positioning unit of the communication device 91 starts positioning of the position of the communication device 91 using the assist data acquired by the communication unit 12 after the communication unit ends communication with the base station 92. . For example, positioning is performed using an assist type GPS system based on data acquired from a plurality of satellites 93 and assist data acquired from the base station 92.
In step S117, when positioning is completed, positioning is terminated.

In step S120, the communication device 91 starts positioning again.
In step S121, the communication device 91 and the base station 92 establish a communication session and start communication.
In step S122, the communication device 91 requests assist data.
In step S123, the base station 92 notifies the communication device 91 of assist data.

In step S124, the communication device 91 notifies the base station 92 of the positioning result in step S116.
In step S125, the communication device 91 ends the communication with the base station 92.

  The communication device 91 can measure the position of the communication device 91 by performing the above operation. In the present embodiment, detailed message exchange between the communication device 91 and the base station 92 is omitted for easy understanding.

(Embodiment 3)
The communication system according to the present embodiment performs the calculation start procedure S136 shown in FIG. 2 between the assist data notification procedure S113 and the communication end procedure S115.

  FIG. 5 shows an example of a positioning method of the communication apparatus according to the present embodiment. The positioning method of the communication apparatus according to the present embodiment includes an assist data notification procedure S113, a calculation start procedure S136, a communication end procedure S115, and a positioning result notification procedure S124 in this order.

  For example, the communication device 91 illustrated in FIG. 1 includes a positioning unit 11 and a communication unit 12, and the positioning unit 11 acquires the communication unit 12 before the communication unit 12 ends communication with the base station 92. The positioning of the position of the communication device 91 is started using the assist data thus obtained.

  The communication device 91 may include the CPU unit 13 illustrated in FIG. 1 and cause the CPU unit 13 to execute a positioning program for the communication device. FIG. 6 shows an example of a positioning program for the communication device. The positioning program of the communication device causes the computer to further execute a calculation start step S236 for starting the calculation of the position using the assist data between the assist data acquisition step S213 and the communication end step S215. That is, the positioning program of the communication device causes the computer to sequentially execute an assist data acquisition step S213, a calculation start step S236, a communication end step S215, and a positioning result transmission step S224. By executing the positioning program of the communication device, it is possible to obtain the same effect as when the communication device 91 has the above configuration.

  Since the calculation start procedure S136 is provided between the assist data notification procedure S113 and the communication end procedure S115, the positioning method of the communication device according to the embodiment starts positioning without waiting for the end of communication. The operating time of the positioning unit 11 shown can be shortened. Since power consumption in the positioning unit 11 can be reduced, the battery life of the communication device can be extended.

FIG. 7 shows an example of specific operations of the communication apparatus and the base station.
In the present embodiment, step S116 shown in FIG. 4 is executed before step S115. And step S116 and step S117 are performed in parallel with step S114 and step S115. Other procedures are the same as those in the second embodiment.

  For example, when the communication device 91 acquires the assist data, the GPS device starts GPS positioning immediately after acquiring the assist data in order to shorten the positioning time by GPS, and notifies the base station 92 of the positioning result in parallel therewith. , Release the communication session.

  As in the second embodiment, in this embodiment, the approximate position notified to the base station 92 may be a dummy positioning result or may be the initial position included in the assist data acquired from the base station 92. . That is, any data may be used as long as it is a notification means that can normally release a communication session.

  By such an operation, the communication session is released as soon as possible after obtaining the assist data, so that the communication time can be shortened and the current during communication during positioning can be reduced. In the present embodiment, detailed message exchange between the communication device 91 and the base station 92 is omitted for easy understanding.

  The present invention can be used in the information communication industry.

11: Positioning unit 12: Communication unit 13: CPU unit 81, 91: Communication device 92: Base station 93: Satellite

Claims (23)

A positioning unit for positioning the position using assist data including satellite navigation data from the base station;
When the assist data is acquired and output to the positioning unit, the communication unit terminates communication with the base station before the positioning unit finishes positioning,
A communication device comprising:   2. The communication according to claim 1, wherein when the positioning unit finishes positioning the communication device, the communication unit resumes communication with the base station, and transmits a positioning result of the positioning unit to the base station. apparatus.   3. The positioning unit according to claim 1, wherein the positioning unit starts positioning the position of the communication device using assist data acquired by the communication unit before the communication unit ends communication with the base station. Communication device.   The communication according to claim 1 or 2, wherein the positioning unit starts positioning of the position of the communication device using assist data acquired by the communication unit after the communication unit ends communication with the base station. apparatus. The positioning unit calculates the approximate position of the communication device using the assist data acquired by the communication unit,
The communication apparatus according to claim 1, wherein the communication unit ends communication with the base station by transmitting the approximate position calculated by the positioning unit to the base station.   The communication apparatus according to claim 5, wherein the approximate position is an initial position included in the assist data.   The communication apparatus according to claim 5, wherein the approximate position is a pseudo position stored in advance in the communication apparatus.   The communication apparatus according to claim 5, wherein the approximate position is an approximate position calculated from the assist data. A communication device according to any one of claims 1 to 8,
A base station of the communication device;
A communication system comprising: Assist data notification procedure for notifying the communication device from the base station of assist data including satellite navigation data;
A communication end procedure for ending communication between the base station and the communication device;
Resuming communication between the base station and the communication device, and a positioning result notification procedure for notifying the base station of the position of the communication device measured by the communication device;
The positioning method of the communication apparatus which has in order.   The communication device positioning method according to claim 10, further comprising a calculation start procedure for starting position calculation using the assist data in the communication device between the assist data notification procedure and the communication end procedure.   The positioning method of the communication apparatus according to claim 10, further comprising a position calculation procedure for starting positioning using the assist data by the communication apparatus between the communication end procedure and the positioning result notification procedure. In the assist data notification procedure, the approximate position of the communication device is calculated using the acquired assist data,
13. The communication device according to claim 10, wherein the communication with the base station is terminated by transmitting the approximate position calculated in the assist data notification procedure to the base station in the communication termination procedure. Positioning method.   The communication device positioning method according to claim 13, wherein the approximate position is an initial position included in the assist data.   The communication apparatus positioning method according to claim 13, wherein the approximate position is pseudo position information stored in advance in the communication apparatus.   The communication apparatus positioning method according to claim 13, wherein the approximate position is an approximate position calculated from the assist data. An assist data acquisition step of acquiring the assist data from the base station with the assist data including satellite navigation data;
A communication end step for ending communication with the base station;
Resuming communication with the base station, and transmitting a positioning result transmission step for transmitting the position of the communication device measured using the assist data to the base station;
A positioning program for a communication device that sequentially causes a computer to execute.   The positioning program for a communication device according to claim 17, further causing a computer to execute a calculation start step of starting calculation of a position using the assist data between the assist data acquisition step and the communication end step.   18. The communication device positioning program according to claim 17, further causing a computer to execute a calculation start step of starting positioning of the position of the communication device using the assist data between the communication end step and the positioning result transmission step. . In the assist data acquisition step, the approximate position of the communication device is calculated using the acquired assist data,
The communication apparatus according to any one of claims 17 to 19, wherein in the communication end step, the communication with the base station is ended by transmitting the approximate position calculated in the assist data acquisition procedure to the base station. Positioning program.   21. The positioning program for a communication device according to claim 20, wherein the approximate position is an initial position included in the assist data.   21. The positioning program for a communication apparatus according to claim 20, wherein the approximate position is pseudo position information stored in advance in the communication apparatus.   The positioning program for a communication device according to claim 20, wherein the approximate position is an approximate position calculated from the assist data.

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