JP6319623B2 - Electronic device system, terminal device, electronic device system control method, and control program - Google Patents

Description

  The present invention relates to an electronic device system including a plurality of terminal devices equipped with a GPS receiver and a wireless communication module, a terminal device, a control method thereof, and a control program.

  In recent years, GPS (Global Positioning System) receivers and wireless devices are widely used in sports devices, outdoor devices such as mountaineering, smartphones (high-performance mobile phones), digital cameras, and other electronic devices. A device equipped with a communication module is known. In such portable devices, it is possible to record the current position and movement trajectory of a user who wears or carries the device, and various information and data acquired by the device are directly transmitted to other devices. It can be sent or stored in the host device.

  By the way, GPS receivers currently installed in many portable devices and the like receive radio waves (GPS signals including time information) transmitted from a plurality of GPS satellites orbiting about 20,000 meters in altitude. The self position is calculated from the difference in arrival time of radio waves at that time. However, it is known that a position error of several meters to several tens of meters or more may occur in such a general absolute position measurement method in such a GPS receiver depending on the reception environment of radio waves, individual variations of mounted devices, and the like. ing. For this reason, various techniques for correcting position information measured by GPS and improving the accuracy of position measurement have been proposed. For example, in Patent Document 1, in an in-vehicle position detection device (car navigation system), GPS signals of other moving bodies (other vehicles) and own moving bodies (own vehicles) are compared, and a signal from a common GPS satellite is obtained. A method is described in which the relative positional relationship between the other moving body and the self-moving body is accurately calculated by use, and the position is corrected by mapping on the map.

  Moreover, in an electronic device having various functions such as the GPS receiver and the wireless communication module as described above, an appropriate and accurate operation clock is required for each functional unit and module. Therefore, for example, as described in Patent Document 2, a configuration in which an individual oscillation circuit or the like is provided for each functional unit such as a GPS module or a Bluetooth module is applied. As a configuration for supplying an operation clock to each functional unit, a configuration in which an oscillation circuit is shared and a reference clock is distributed and supplied to each functional unit is conceivable, but in this case, from the oscillation circuit to each functional unit Since wiring needs to be routed, there are problems such as signal delay, increase in circuit scale, and restrictions on circuit design, which are not preferable.

JP 2003-337029 A JP 2005-510166 Gazette

  As described above, in a portable device equipped with a GPS receiver and a wireless communication module, in addition to high GPS positioning accuracy, the device size is small and low cost from the viewpoint of product characteristics and convenience. And low power consumption.

  Accordingly, the present invention provides an electronic device system and a terminal device including a plurality of portable terminal devices that can improve the positioning accuracy of GPS while reducing the device size, reducing the cost, and reducing the power consumption. And an electronic device system control method and a control program.

An electronic device system according to the present invention includes:
An electronic device system including a plurality of terminal devices that perform wireless communication with each other,
Each of the terminal devices includes a position information detection unit that acquires position information based on a positioning signal including time information by a global positioning system, a wireless communication unit that transmits or receives data by wireless communication, and a wireless communication unit A communication control unit that controls an operation state; and a position information correction processing unit that corrects the position information acquired by the position information detection unit;
The position information detection unit of each terminal device generates a first synchronization signal based on the time information when the positioning signal can be received,
The communication control unit of each terminal device activates the wireless communication unit in a sleep state at a timing based on the first synchronization signal,
When one terminal device in the plurality of terminal devices corrects the position information in the position information correction processing unit transmitted from another terminal device in the plurality of terminal devices via the wireless communication unit. Receive the necessary correction data ,
Each of the terminal devices generates a second synchronization signal based on an internal clock of the position information detection unit when the position information detection unit cannot receive the positioning signal,
The communication control unit of each terminal device activates the wireless communication unit based on the second synchronization signal and attempts to transmit or receive correction data necessary for correcting the position information.
The specific terminal device that has attempted to receive the correction data in the plurality of terminal devices and has not received the correction data until the next activation timing based on the second synchronization signal. In the meantime, the operation period of the wireless communication unit is set to a time longer than the operation period of the wireless communication unit of the terminal device that has attempted to transmit the correction data, and restarted.
It is characterized by that.

The terminal device according to the present invention is
One terminal device applied to an electronic device system including a plurality of terminal devices that perform wireless communication with each other,
A position information detection unit that acquires position information based on a positioning signal including time information by a global positioning system, a wireless communication unit that transmits or receives data by wireless communication, and a communication that controls an operation state of the wireless communication unit A control unit, and a position information correction processing unit that corrects the position information acquired by the position information detection unit,
The position information detection unit generates a first synchronization signal based on the time information when the positioning signal can be received,
The communication control unit activates the wireless communication unit in a sleep state at a timing based on the first synchronization signal, and from the other terminal device having the position information detection unit via the wireless communication unit, Receives correction data necessary for correcting the position information in the position information correction processing unit ,
The position information detection unit, the wireless communication unit, and the communication control unit,
The position information detection unit generates the first synchronization signal based on the time information when the positioning signal is received.
The communication control unit activates the wireless communication unit in a sleep state at a timing based on the first synchronization signal, and transmits the correction data via the wireless communication unit,
When the position information detection unit has not received the positioning signal, the position information detection unit generates a second synchronization signal based on an internal clock of the position information detection unit,
The communication control unit activates the wireless communication unit based on the second synchronization signal, and transmits the correction data.
If the positioning signal is not transmitted, the wireless communication unit is activated again and transmitted until the next activation timing based on the second synchronization signal.
It is characterized by that.

An electronic device system control method according to the present invention includes:
A method for controlling an electronic device system including a plurality of terminal devices that perform wireless communication with each other,
Each terminal device has a position information detection unit that acquires position information based on a positioning signal that includes time information by a global positioning system, and a wireless communication unit that transmits or receives data by wireless communication,
In each terminal device, when the positioning signal can be received, a first synchronization signal is generated based on the time information,
Activating the wireless communication unit in the sleep state of each terminal device at a timing based on the first synchronization signal,
In one terminal device in the plurality of terminal devices, the position information acquired by the position information detection unit transmitted from another terminal device in the plurality of terminal devices is corrected via the wireless communication unit. Receive the necessary correction data,
In the one terminal device, the position information is corrected based on the received correction data ,
In each terminal device, when the positioning signal is not received,
Generating a second synchronization signal based on the internal clock of the position information detector;
Based on the second synchronization signal, activate the wireless communication unit, try to transmit or receive the correction data,
The specific terminal device that has attempted to receive the correction data in the plurality of terminal devices and has not received the correction data until the next activation timing based on the second synchronization signal. In the meantime, the operation period of the wireless communication unit is set to a time longer than the operation period of the wireless communication unit of the terminal device attempting to transmit the correction data, and is activated again.
It is characterized by that.

A control program for an electronic device system according to the present invention includes:
A control program for an electronic device system including a plurality of terminal devices that perform wireless communication with each other,
Each terminal device has a position information detection unit that acquires position information based on a positioning signal including time information by a global positioning system, and a wireless communication unit that transmits and receives data by wireless communication,
On the computer,
In each of the plurality of terminal devices, when the positioning signal can be received, the first synchronization signal is generated based on the time information,
Activating the wireless communication unit in the sleep state of each terminal device at a timing based on the first synchronization signal,
In one terminal device in the plurality of terminal devices, the position information acquired by the position information detection unit transmitted from another terminal device in the plurality of terminal devices is corrected via the wireless communication unit. To receive correction data necessary for
In the one terminal device, the position information is corrected based on the received correction data ,
In each terminal device, when the positioning signal is not received,
Generating a second synchronization signal based on an internal clock of the position information detector;
Based on the second synchronization signal, activate the wireless communication unit, try to transmit or receive the correction data,
The specific terminal device that has attempted to receive the correction data in the plurality of terminal devices and has not received the correction data until the next activation timing based on the second synchronization signal. In the meantime, the operation period of the wireless communication unit is set to a time longer than the operation period of the wireless communication unit of the terminal device attempting to transmit the correction data, and is activated again.
It is characterized by that.

  According to the present invention, in a portable terminal device equipped with a GPS receiver and a wireless communication module, the GPS positioning accuracy is improved and the device size is reduced, the cost is reduced, and the power consumption is reduced. Can do.

It is a schematic block diagram which shows an example of the electronic device system which concerns on this invention. It is a block diagram which shows schematic structure of the terminal device applied to the electronic device system which concerns on this invention. It is a flowchart which shows an example of the control method of the 1st terminal device which concerns on this embodiment. It is a flowchart which shows an example of the control method of the 2nd terminal device which concerns on this embodiment. It is a timing chart which shows the operation state of the 1st and 2nd terminal device in the control method of the electronic device system concerning this embodiment. It is a timing chart which shows an example of the operation state at the time of data communication in a general electronic device.

  Hereinafter, an electronic device system, a terminal device, a control method of the electronic device system, and a control program according to the present invention will be described in detail with reference to embodiments.

<Electronic equipment system>
FIG. 1 is a schematic configuration diagram showing an example of an electronic device system according to the present invention. FIG. 1A is a conceptual diagram illustrating an example of data communication between terminal devices, and FIGS. 1B to 1D are a plurality of examples of terminal devices applicable to the electronic device system according to the present invention. FIG. FIG. 2 is a block diagram showing a schematic configuration of a terminal device applied to the electronic device system according to the present invention.

  An embodiment of an electronic device system according to the present invention includes a first terminal device 100 and a second terminal device 200, as shown in FIG. Here, each of the first terminal device 100 and the second terminal device 200 has a predetermined wireless communication function and is configured to be able to transmit data by wireless communication. FIG. 1A shows a configuration in the case where the first terminal device 100 and the second terminal device 200 are connected by wireless communication in a one-to-one relationship, but the present invention is not limited to this. Instead, a plurality of terminal devices may be connected to each other by wireless communication as in a one-to-many relationship.

  In such an electronic device system, the first terminal device 100 and the second terminal device 200 have, for example, a wristwatch type and a wristband type appearance as shown in FIG. It is attached to (wrist etc.). In addition, as long as the 1st terminal device 100 and the 2nd terminal device 200 are provided with a GPS receiver and a radio | wireless communication module so that it may mention later, an external shape is not specifically limited. Therefore, one or both of the first terminal device 100 and the second terminal device 200 are, for example, portable devices for outdoor use (for example, GPS logger) such as mountain climbing as shown in FIG. It may have various forms such as a smartphone as shown in FIG. 1C and a digital camera as shown in FIG. When the first terminal device 100 and the second terminal device 200 have these forms, they are carried, for example, mounted on a user's backpack or bag or stored in a clothes pocket or the like.

  The first terminal device 100 and the second terminal device 200 according to the present embodiment have substantially the same configuration except for a functional part unique to each terminal device. For example, as shown in FIG. 2, the first terminal device 100 and the second terminal device 200 roughly include a GPS antenna 110, a GPS receiver (position information detector) 120, and a crystal device for a GPS receiver ( Internal clock) 130, communication antenna 140, communication module (wireless communication unit) 150, arithmetic circuit unit (communication control unit, position information correction processing unit) 160, crystal circuit 170 for the arithmetic circuit unit, power supply And a supply unit 180.

  In the following, the operation in the first terminal device 100 is mainly described. However, as described above, the second terminal device 200 has the same configuration as that of the first terminal device 100, and the second terminal device 100 has a second configuration. The terminal device 200 of FIG. 6 basically operates in the same manner as the first terminal device 100. The GPS receiving unit 120 receives the radio waves from a plurality of GPS satellites via the GPS antenna 110, and based on the time information included in the GPS signals (positioning signals) from the GPS satellites, the geographical position information Is obtained and output as positioning data. When the user wearing or carrying the first terminal device 100 is moving, the first terminal device 100 (substantially) is calculated by the arithmetic circuit unit 160 based on the positioning data output by the GPS receiving unit 120. The movement direction of the user who wears or carries the first terminal device 100 is calculated. Here, the timing of the processing operation in the GPS receiving unit 120 is controlled based on a basic clock generated by the crystal device 130 having a crystal resonator or a crystal oscillator. The crystal device 130 is built in the GPS receiving unit 120 or attached outside the GPS receiving unit 120.

  The communication module 150 is a communication circuit for transmitting or receiving various data via the communication antenna 140 between the first terminal device 100 and the second terminal device 200 in a predetermined wireless communication format. Have. In particular, the communication module 150 corrects the position information acquired by the GPS receiver 120 at least in a state where GPS positioning is possible (or in a state where it is possible) in the first terminal device 100 and the second terminal device 200. Necessary position calculation data information (position information, satellite information, etc.) is transmitted or received. Here, the processing operation in the communication module 150 is a one-second periodic signal (hereinafter referred to as “1 PPS (Pulse Per Second) generated by the GPS receiver 120 based on time information from a GPS satellite” in a state where GPS positioning is possible. ) Signal "; the first synchronization signal), the timing is controlled. On the other hand, in a state where GPS positioning is not possible (or a state where GPS positioning is not possible), for example, a pseudo 1-second periodic signal (hereinafter referred to as convenience) generated based on a basic clock in the crystal device 130 attached to the GPS receiving unit 120. The timing of the processing operation in the communication module 150 is controlled based on the “pseudo 1PPS signal”; The wireless communication performed between the first terminal device 100 and the second terminal device 200 via the communication module 150 is, for example, Bluetooth (registered trademark) communication or Bluetooth slow energy (Bluetooth (registered trademark)). (Trademark) Low energy (LE)) communication, Wi-Fi (wireless fidelity (registered trademark)) communication, and various communication methods such as high-speed mobile communication using a mobile phone network can be applied. .

  The arithmetic circuit unit 160 is an arithmetic device such as a CPU (central processing unit) or MPU (microprocessor), and executes a predetermined control program or algorithm program to thereby execute the first terminal device 100 or the second terminal device. Controls various operations such as functions unique to the terminal device 200, calculation of position information in the GPS receiver 120, and data communication between the first terminal device 100 and the second terminal device 200 in the communication module 150. To do. In addition, the arithmetic circuit unit 160 sets the first terminal device 100 to the normal operation mode or the low power consumption mode, and for example, the first terminal device 100 is in an unused state in which no operation is performed. When the unused state continues for a certain time, the first terminal device 100 is shifted to the low power consumption mode. Then, the first terminal device 100 is controlled to shift to the normal operation mode when a certain operation such as an interrupt process described later is performed and the first terminal device 100 enters a use state. In the normal operation mode of the first terminal device 100, driving power is supplied from the power supply unit 180 to each function unit in the first terminal device 100. On the other hand, in the low power consumption mode, the arithmetic circuit unit 160 executes control for partially interrupting the supply of driving power from the power supply unit 180 to each functional unit. In the present embodiment, in the low power consumption mode, in the sleep mode, at least the supply of the drive power to the communication module 150 is restricted or cut off, but the drive power is supplied to the other functional units and the drive state. Is maintained (so-called shallow low power consumption mode). In the present embodiment, in the low power consumption mode, in the stop mode (rest mode), the arithmetic circuit unit 160 and a functional unit related to specific interrupt control that ends the low power consumption mode and shifts to the normal operation mode. Other than the above, the driving power supply to other functional units is cut off and the operation is completely stopped (so-called deep low power consumption mode). Here, the processing operation of the arithmetic circuit unit 160 is controlled in timing based on a basic clock generated by the crystal device 170 built in the arithmetic circuit unit 160 or attached outside the arithmetic circuit unit 160. The Note that the electronic device system control method (communication module synchronization control method) according to the present embodiment will be described in detail later.

  The power supply unit 180 supplies driving power to each functional unit in the first terminal device 100. Here, as the power supply unit 180, for example, a commercially available primary battery such as a dry battery, a coin-type battery, a button-type battery, or a secondary battery such as a lithium ion battery or a nickel metal hydride battery can be applied. In addition to the primary battery and the secondary battery described above, the power supply unit 180 may be used alone or in combination with an energy harvesting technology that generates power using energy such as vibration, light, heat, and electromagnetic waves. Can also be applied.

  Note that the first terminal device 100 and the second terminal device 200 include, for example, an input operation unit, a sensor unit, a memory unit, a display unit, and the like in addition to the configuration illustrated in FIG. 2 described above. There may be. Here, the input operation unit is, for example, an input unit such as a push button or a touch panel, and controls the sensing operation in the GPS receiving unit 120, the data communication operation in the communication module 150, and the power supply of the first terminal device 100. Used for on / off control and various device setting input operations. The sensor unit is a sensor means such as an acceleration sensor, a gyro sensor, or a geomagnetic sensor, and executes various application software (for example, software for measuring and recording a movement path, a motion state, etc.) in the arithmetic circuit unit 160. At that time, various physical or biological sensor data and the like are acquired. The memory unit stores sensor data acquired by the sensor unit, display data to be displayed on the display unit, and data used or generated when a predetermined control program or algorithm program is executed in the arithmetic circuit unit 160. . The display unit displays various types of information related to application software executed in the first terminal device 100, information related to the communication state between the first terminal device 100 and the second terminal device 200, and the like. To do.

<Control method of electronic device system>
Next, the control method of the electronic device system according to the present invention will be described. Here, in the electronic device system including the first terminal device 100 and the second terminal device 200 having the above-described circuit configuration, when data communication is performed at a cycle of 1 second, the GPS positioning state and the GPS positioning cannot be performed. A synchronization control method of the communication module in the state will be described. A series of processing operations described below is realized based on a predetermined algorithm program executed in each arithmetic circuit unit 160 of the first terminal device 100 and the second terminal device 200.

  FIG. 3 is a flowchart illustrating an example of a first terminal device control method according to the present embodiment, and FIG. 4 is a flowchart illustrating an example of a second terminal device control method according to the present embodiment. Here, the first terminal device 100 is a terminal device that transmits position calculation data information necessary for position correction in GPS positioning (referred to as “transmission side” for convenience), and the second terminal device 200. Will be described as a terminal device that receives position calculation data information and corrects position information (referred to as “reception side” for convenience). FIG. 5 is a timing chart showing operation states of the first and second terminal devices in the control method of the electronic device system according to the present embodiment. Here, the control operation shown in the flowchart of FIG. 3 in the first terminal device 100 and the control operation shown in the flowchart of FIG. 4 in the second terminal device 200 are shown in the timing chart of FIG. As shown, they are executed in parallel with each other.

  In the electronic device system control method (communication module synchronization control method) according to the present embodiment, each of the first terminal device 100 and the second terminal device 200 includes the communication module 150 at a cycle of 1 second. The unit is shifted to the normal operation mode, and data communication processing and various processing operations in each functional unit are executed.

  As shown in the flowcharts of FIGS. 3 and 4, first, each arithmetic circuit unit 160 of the first terminal device 100 on the transmission side and the second terminal device 200 on the reception side is set to the low power consumption mode. When a periodic interrupt timer or a one-second synchronization signal interrupt is detected (steps S102 and S202), the operation state is shifted from the low power consumption mode to the normal operation mode (steps S104 and S204). .

  Next, each arithmetic circuit unit 160 of the first terminal device 100 and the second terminal device 200 determines whether there is a program for executing control processing in each functional unit including the communication module 150 (step S106, S206) When there is no program to be executed, when the program is terminated, or when an operation termination request is received from the user, the mode is shifted to the stop mode of the low power consumption mode (steps S112, S214). ).

  On the other hand, when there is a program for executing control processing in the communication module 150, each arithmetic circuit unit 160 executes data communication processing via each communication module 150 (steps S108 and S208). Specifically, the GPS receiving unit 120 executes a processing operation based on a basic clock generated by the crystal device 130, and positioning data is output to the arithmetic circuit unit 160 at intervals of 1 second. Therefore, each arithmetic circuit unit 160 prohibits the transition to the stop mode immediately before receiving the positioning data from the GPS receiving unit 120, shifts the setting of the low power consumption mode to the sleep mode, and receives the positioning data. For 1 second measurement operation.

  Next, in the state as described above, when the GPS receiving units 120 of the first terminal device 100 and the second terminal device 200 are both in a state where GPS positioning is possible (or in a state where they are made), FIG. “1PPS synchronization operation” shown in the timing chart of FIG. That is, when each arithmetic circuit unit 160 detects a 1 PPS signal generated by each GPS receiving unit 120, each communication module 150 is activated in synchronization with the timing (that is, in a cycle of 1 second) to perform data transmission. Execute communication processing.

  Here, the communication modules 150 of the first terminal device 100 and the second terminal device 200 are generated by the GPS receivers 120 based on time information from GPS satellites, and are based on 1 PPS signals synchronized with each other. Start at the timing. The 1PPS signal of the first terminal device 100 and the 1PPS signal of the second terminal device 200 are signals having the accuracy of an atomic clock provided in a GPS satellite, and are synchronized with high accuracy. As a result, data communication processing is performed in a state in which the first terminal device 100 and the second terminal device 200 are synchronized with each other, and transmission or reception of data is successful (step S110, S210). That is, the position calculation data information transmitted from the communication module 150 of the first terminal device 100 on the transmission side is received without delay by the communication module 150 of the second terminal device 200 on the reception side. And the arithmetic circuit part 160 of the 2nd terminal device 200 which is a receiving side performs the correction process of the positional information in GPS positioning based on the received data information for positional calculation. As described above, in each GPS receiving unit 120 of the first terminal device 100 and the second terminal device 200, in a state where GPS positioning is possible, the first terminal device 100 and the second terminal device 200 are wirelessly connected. Using communication, correction processing of position information in GPS positioning is executed in real time.

  Next, when the data communication process (specifically, the position information correction process in the second terminal device 200 on the receiving side) is normally completed, the first terminal device 100 and the second terminal device 200 are processed. Each arithmetic circuit unit 160 shifts to the stop mode in the low power consumption mode (steps S112 and S214). Then, each arithmetic circuit unit 160 returns to steps S102 and S202 again, and repeatedly executes the series of processing operations described above.

  In the above-described series of processing operations, when there is a program for executing control processing in each functional unit other than the communication module 150 in steps S106 and S206, the above-described data communication processing is performed by detecting a periodic interrupt timer. In parallel with (steps S108 and S208) or in place, data processing such as control processing of various functional units and data analysis in the first terminal device 100 and the second terminal device 200 is executed.

  On the other hand, in the data communication processing of steps S108 and S208 described above, for example, the GPS receiving unit 120 of the first terminal device 100 is in a state where GPS positioning is possible (or in a state where it is possible), and the second terminal device 200 When the GPS receiving unit 120 is in a state where GPS positioning cannot be performed (or in a state where GPS positioning is not possible), each arithmetic circuit unit 160 executes the following processing operation.

  In such a state, as in the “pseudo 1PPS synchronization operation” shown in the timing chart of FIG. 5, the 1PPS signal is generated from the GPS receiver 120 of the first terminal device 100 on the transmission side, and the arithmetic circuit unit However, no 1PPS signal is generated from the GPS receiver 120 of the second terminal device 200 on the receiving side. Therefore, in the first terminal device 100, the arithmetic circuit unit 160 activates the communication module 150 in synchronization with the timing of the 1PPS signal generated by the GPS receiving unit 120, as in the processing operation described above. Further, in the second terminal device 200, a pseudo 1-second period signal (pseudo 1PPS signal) is generated based on a basic clock generated by the crystal device 130 attached to the GPS receiver 120, and an arithmetic circuit unit 160 activates the communication module 150 in synchronization with the timing (that is, in a cycle of 1 second).

  Here, when data transmission or reception is successful between the first terminal device 100 and the second terminal device 200 (steps S110 and S210), the first terminal device 100 and the first terminal device described above are used. The same processing operation as in the state where each GPS receiving unit 120 of the second terminal device 200 can perform GPS positioning is executed. That is, the position calculation data information is transmitted from the first terminal device 100 on the transmission side to the second terminal device 200 on the reception side, and the second terminal device 200 corrects the position information in the GPS positioning. Is executed.

  On the other hand, when data transmission or reception fails between the first terminal device 100 and the second terminal device 200, the following processing operation is executed. That is, since the 1PPS signal that activates the communication module 150 of the first terminal device 100 is generated based on the time information from the GPS satellite, the accuracy of the atomic clock provided in the GPS satellite can be obtained. On the other hand, the pseudo 1PPS signal that activates the communication module 150 of the second terminal device 200 is generated by the crystal device 130 attached to the GPS receiver 120, although it has a relatively high clock accuracy. Since the clock is generated based on the basic clock or the basic clock generated by the crystal device 170 attached outside the arithmetic circuit unit 160, the clock accuracy is higher than that of the 1PPS signal that provides the accuracy of the original clock. Low. Therefore, each communication module 150 of the first terminal device 100 that is the transmission side and the second terminal device 200 that is the reception side executes the data communication processing in a state where the synchronization is not strictly performed. In some cases, data transmission or reception fails (steps S110 and S210).

  In this case, the arithmetic circuit unit 160 of the first terminal device 100 on the transmission side activates the communication module 150 again at a timing (retransmission timing) when a predetermined time set in advance has elapsed. In addition, the arithmetic circuit unit 160 of the second terminal device 200 on the receiving side activates the communication module 150 again at a timing (re-reception timing) when a predetermined time set in advance has elapsed. Here, the arithmetic circuit unit 160 of the second terminal device 200 re-receives the communication module 150 at a timing earlier than the activation timing for the retransmission of the communication module 150 of the first terminal device 100 on the transmission side. Control to start for. That is, the operation period of the communication module 150 of the second terminal device 200 (in other words, the reception waiting time of data transmitted from the communication module 150 of the first terminal device 100; the width of the access window) Wr is set to the first It is set wider than the operation period Ws of the communication module 150 of the terminal device 100 (step S216). More preferably, the activation timing of the communication module 150 of the second terminal device 200 is set to a timing earlier than the activation timing of the communication module 150 of the first terminal device 100 and the communication of the second terminal device 200 is performed. The operation end timing of the module 150 is set to a timing later than the operation end timing of the communication module 150 of the first terminal device 100. Thus, data is retransmitted from the communication module 150 of the first terminal device 100 during the operation period for re-reception of the communication module 150 of the second terminal device 200 (steps S114 and S218). ), Data transmission or reception succeeds (steps S110 and S210). That is, the position calculation data information transmitted from the communication module 150 of the first terminal device 100 on the transmission side is received without delay by the communication module 150 of the second terminal device 200 on the reception side. And the arithmetic circuit part 160 of the 2nd terminal device 200 which is a receiving side performs the correction process of the positional information in GPS positioning based on the received data information for positional calculation. As described above, the first terminal device 100 and the second terminal device are in a state where GPS positioning cannot be performed in either one of the first terminal device 100 and the second terminal device 200 or both of the GPS receiving units 120. The position information correction processing in GPS positioning is executed in substantially real time using wireless communication by repeatedly executing data transmission or reception with the 200.

  Next, when the data communication process (specifically, the position information correction process in the second terminal device 200 on the receiving side) is normally completed, the arithmetic circuit unit 160 of the first terminal device 100 A transition is made to the stop mode of the low power consumption mode (step S112). In addition, the arithmetic circuit unit 160 of the second terminal device 200 resets the width of the access window whose setting has been changed in step S216 (step S212), and shifts to the stop mode in the low power consumption mode (step S214). ). Then, each arithmetic circuit unit 160 returns to steps S102 and S202 again, and repeatedly executes the series of processing operations described above.

(Function and effect)
Next, the effect in the electronic device system which concerns on this embodiment mentioned above is demonstrated in detail.
As described above, the GPS satellites constituting the GPS are equipped with atomic clocks, and the GPS signal received when positioning is performed in a terminal device equipped with a GPS receiver includes time information generated by the atomic clocks. It is included. In the present embodiment, in a state where GPS positioning is possible, the GPS receiving unit 120 generates a 1PPS signal synchronized with the periodic data included in the navigation message, based on the time information from the GPS satellite. Here, the 1PPS signal is a high-accuracy pulse signal that can obtain the accuracy of an atomic clock of a GPS satellite generated at a cycle of 1 second. In addition, the 1PPS signals generated in each of the GPS receivers 120 mounted on the plurality of terminal devices 100 and 200 that receive GPS signals from a common GPS satellite are synchronized with very high accuracy.

  Further, the communication module 150 for performing data communication between the terminal devices 100 and 200 is set to the low power consumption mode and is driven in the low power consumption state except in the normal operation mode in which data transmission is performed by wireless communication. It is carried out. In general electronic equipment, in this low power consumption mode, a crystal device that generates a basic clock of low speed (for example, 32 kHz) is always operated for synchronization, and the power supply of the communication module is substantially off. A method is also used in which time is counted and used as a start timing when shifting to the normal operation mode.

  On the other hand, in the present embodiment, the above-described 1PPS signal is synchronized with the start timing when the communication modules 150 mounted on the plurality of terminal devices 100 and 200 shift from the low power consumption mode to the normal operation mode. It is used for.

  Here, when data transmission is performed by wireless communication between the plurality of terminal devices 100 and 200 via the communication module 150 (during data communication processing), transmission of position calculation data information necessary for position correction in GPS positioning or When only receiving is performed, control for starting the communication module 150 may be performed only during a period in which GPS positioning is possible. That is, in the present embodiment, when control for starting the communication module is performed only in a state where GPS positioning is possible, each of the synchronization crystal devices generally attached to the communication module is not operated. Since the communication module 150 can be synchronized, the crystal device can be removed (omitted). Therefore, according to the present embodiment, in a terminal device equipped with a GPS receiver and a communication module, it is possible to reduce the number of parts and reduce the mounting area of the communication module while improving the positioning accuracy of GPS. It is possible to reduce the size and cost (reduction in cost) of the device.

  On the other hand, in this embodiment, in a state where GPS positioning cannot be performed due to a poor radio wave reception environment or the like, the GPS receiving unit 120 cannot receive time information from a GPS satellite, and thus generates a 1 PPS signal. I can't. Therefore, in the present embodiment, a pseudo 1PPS signal having the accuracy of the basic clock (real-time clock) of the crystal device 130 attached to the GPS receiver 120 is generated, and the communication module 150 is activated in synchronization with the timing. . Here, although the pseudo 1PPS signal has a relatively high clock accuracy, the accuracy of the original clock in the 1PPS signal cannot be obtained. Therefore, the activation timing of each communication module 150 of the plurality of terminal devices 100 and 200 is determined. There is a case where data cannot be synchronized precisely and data transmission or reception fails. In this case, in this embodiment, the transmission or reception of data between the terminal devices 100 and 200 is repeated again, and the position window necessary for correcting the position information is set by widening the access window of the terminal device 200 on the receiving side. The calculation data information can be appropriately transmitted or received between the terminal devices 100 and 200.

  As a result, in this embodiment, regardless of whether or not GPS positioning can be performed by each GPS receiving unit 120 (whether or not GPS positioning is possible), synchronization when each communication module 150 is shifted from the low power consumption mode to the normal operation mode. Can be taken. That is, in the present embodiment, since the communication modules 150 can be synchronized without operating the synchronization crystal device generally attached to the communication module, the crystal device can be removed (omitted). it can. Therefore, according to the present embodiment, it is possible to reduce the number of components and reduce the mounting area of the communication module while improving the positioning accuracy of GPS, and it is possible to reduce the size and cost (lower cost) of the terminal device. Can be planned.

  In general electronic equipment, when data communication is performed with the clock accuracy of a crystal device, for example, as shown in the timing chart of FIG. 6, a communication module of a terminal equipment on the receiving side is replaced with a terminal equipment on the sending side. Is used earlier than the communication module (Tc), and the operation period (access window width) Wb of the communication module on the receiving side is set wider than the operation period Wa of the communication module on the transmission side. It has been.

  In contrast, in the present embodiment, as shown in FIG. 5, when GPS positioning is performed, the activation timing and operation period of the communication module 150 are based on the 1 PPS signal that can obtain the accuracy of the atomic clock. Therefore, it is not necessary to set a wide access window on the receiving side, it can be set extremely narrow, and power consumption during data communication can be reduced.

  In general electronic devices, when the low power consumption mode continues for a long time, for example, as shown in the timing chart of FIG. A method of transmitting a beacon Sb is used. Here, for example, when synchronization is performed using a beacon in Bluetooth communication, power of about 50 mA is consumed.

  On the other hand, in the present embodiment, even when the low power consumption mode state continues for a relatively long time, it is relatively accurate between the terminal devices 100 and 200 based on the most recently generated 1 PPS signal. Can be synchronized. Therefore, according to the present embodiment, it is not necessary to synchronize the terminal devices 100 and 200 by transmitting or receiving a synchronization signal such as a beacon in the low power consumption mode, and power consumption during beacon transmission or reception is reduced. can do. FIG. 6 is a timing chart illustrating an example of an operation state during data communication in a general electronic device.

  In the embodiment described above, in order to simplify the description, the case where wireless communication is performed between the first terminal device 100 on the transmission side and the second terminal device 200 on the reception side has been described. The present invention is not limited to this. That is, in the electronic device system according to the present invention, one or a plurality of terminal devices 200 that are unspecified or specific are set as the receiving side with respect to the terminal device 100 that transmits the position calculation data information necessary for correcting the position information. It may be present.

  In the above-described embodiment, the case where the position calculation data information necessary for correcting the position information is transmitted or received between the terminal device on the transmission side and the terminal device on the reception side has been described. The present invention is not limited to this. That is, the electronic device system according to the present invention associates the position information corrected based on the above-described series of communication module synchronization control methods on the map data using various map matching methods, and thereby the terminal device. The absolute position may be specified. Alternatively, in addition to the corrected location information described above, the absolute signal of the terminal device can be obtained by using radio waves from an access point of Wi-Fi (Wi-Fi (registered trademark)) communication around the terminal device or a base station of the mobile phone network. The position may be specified or the accuracy of the position information may be improved.

As mentioned above, although some embodiment of this invention was described, this invention is not limited to embodiment mentioned above, It includes the invention described in the claim, and its equivalent range.
Hereinafter, the invention described in the scope of claims of the present application will be appended.

(Appendix)
[1]
An electronic device system including a plurality of terminal devices that perform wireless communication with each other,
Each of the terminal devices includes a position information detection unit that acquires position information based on a positioning signal including time information by a global positioning system, a wireless communication unit that transmits or receives data by wireless communication, and a wireless communication unit A communication control unit that controls an operation state; and a position information correction processing unit that corrects the position information acquired by the position information detection unit;
The position information detection unit of each terminal device generates a first synchronization signal based on the time information when the positioning signal can be received,
The communication control unit of each terminal device activates the wireless communication unit in a sleep state at a timing based on the first synchronization signal,
When one terminal device in the plurality of terminal devices corrects the position information in the position information correction processing unit transmitted from another terminal device in the plurality of terminal devices via the wireless communication unit. Receive the necessary correction data,
An electronic device system characterized by that.

[2]
Each of the terminal devices generates a second synchronization signal based on an internal clock of the position information detection unit when the position information detection unit cannot receive the positioning signal,
The electronic device according to [1], wherein the communication control unit of each terminal device activates the wireless communication unit based on the second synchronization signal and transmits or receives the correction data. Equipment system.

[3]
When the specific terminal device that has not received the positioning signal in the plurality of terminal devices receives the correction data from the other terminal device via the wireless communication unit, the specific terminal device is based on the second synchronization signal. The activation timing of the wireless communication unit is set to a time earlier than the activation timing of the wireless communication unit in the other terminal device, and the operation period of the wireless communication unit is set to the wireless communication of the other terminal device. The electronic device system according to [2], wherein the electronic device system is set to a time longer than an operation period of the unit.

[4]
The electronic device according to any one of [1] to [3], wherein the first synchronization signal is a signal having a period of 1 second generated based on time information included in the positioning signal. system.

[5]
One terminal device applied to an electronic device system including a plurality of terminal devices that perform wireless communication with each other,
A position information detection unit that acquires position information based on a positioning signal including time information by a global positioning system, a wireless communication unit that transmits or receives data by wireless communication, and a communication that controls an operation state of the wireless communication unit A control unit, and a position information correction processing unit that corrects the position information acquired by the position information detection unit,
The position information detection unit generates a first synchronization signal based on the time information when the positioning signal can be received,
The communication control unit activates the wireless communication unit in a sleep state at a timing based on the first synchronization signal, and from the other terminal device having the position information detection unit via the wireless communication unit, Receiving correction data necessary for correcting the position information in the position information correction processing unit;
Terminal equipment characterized by that.

[6]
The other terminal device according to [5],
The position information detection unit, the wireless communication unit, and the communication control unit,
The position information detection unit generates the first synchronization signal based on the time information when the positioning signal is received.
The communication control unit activates the wireless communication unit in a sleep state at a timing based on the first synchronization signal, and transmits the correction data via the wireless communication unit.
Terminal equipment characterized by that.

[7]
A method for controlling an electronic device system including a plurality of terminal devices that perform wireless communication with each other,
Each terminal device has a position information detection unit that acquires position information based on a positioning signal that includes time information by a global positioning system, and a wireless communication unit that transmits or receives data by wireless communication,
In each terminal device, when the positioning signal can be received, a first synchronization signal is generated based on the time information,
Activating the wireless communication unit in the sleep state of each terminal device at a timing based on the first synchronization signal,
In one terminal device in the plurality of terminal devices, the position information acquired by the position information detection unit transmitted from another terminal device in the plurality of terminal devices is corrected via the wireless communication unit. Receive the necessary correction data,
In the one terminal device, the position information is corrected based on the received correction data.
An electronic device system control method characterized by the above.

[8]
In each terminal device, when the positioning signal is not received,
Generating a second synchronization signal based on the internal clock of the position information detector;
The electronic device system control method according to [7], wherein the wireless communication unit is activated based on the second synchronization signal to transmit or receive the correction data.

[9]
A control program for an electronic device system including a plurality of terminal devices that perform wireless communication with each other,
Each terminal device has a position information detection unit that acquires position information based on a positioning signal including time information by a global positioning system, and a wireless communication unit that transmits and receives data by wireless communication,
On the computer,
In each of the plurality of terminal devices, when the positioning signal can be received, the first synchronization signal is generated based on the time information,
Activating the wireless communication unit in the sleep state of each terminal device at a timing based on the first synchronization signal,
In one terminal device in the plurality of terminal devices, the position information acquired by the position information detection unit transmitted from another terminal device in the plurality of terminal devices is corrected via the wireless communication unit. To receive correction data necessary for
In the one terminal device, the position information is corrected based on the received correction data.
A control program for an electronic device system.

[10]
In each terminal device, when the positioning signal is not received,
Generating a second synchronization signal based on an internal clock of the position information detector;
The control program for an electronic device system according to [9], wherein the wireless communication unit is activated based on the second synchronization signal to transmit or receive the correction data.

DESCRIPTION OF SYMBOLS 100 1st terminal device 110 GPS antenna 120 GPS receiving part 130,170 Crystal device 140 Antenna for communication 150 Communication module 160 Arithmetic circuit part 180 Power supply part 200 2nd terminal device

Claims (5)

An electronic device system including a plurality of terminal devices that perform wireless communication with each other,
Each of the terminal devices includes a position information detection unit that acquires position information based on a positioning signal including time information by a global positioning system, a wireless communication unit that transmits or receives data by wireless communication, and a wireless communication unit A communication control unit that controls an operation state; and a position information correction processing unit that corrects the position information acquired by the position information detection unit;
The position information detection unit of each terminal device generates a first synchronization signal based on the time information when the positioning signal can be received,
The communication control unit of each terminal device activates the wireless communication unit in a sleep state at a timing based on the first synchronization signal,
When one terminal device in the plurality of terminal devices corrects the position information in the position information correction processing unit transmitted from another terminal device in the plurality of terminal devices via the wireless communication unit. Receive the necessary correction data ,
Each of the terminal devices generates a second synchronization signal based on an internal clock of the position information detection unit when the position information detection unit cannot receive the positioning signal,
The communication control unit of each terminal device activates the wireless communication unit based on the second synchronization signal and attempts to transmit or receive correction data necessary for correcting the position information.
The specific terminal device that has attempted to receive the correction data in the plurality of terminal devices and has not received the correction data until the next activation timing based on the second synchronization signal. In the meantime, the operation period of the wireless communication unit is set to a time longer than the operation period of the wireless communication unit of the terminal device that has attempted to transmit the correction data, and restarted.
An electronic device system characterized by that. The electronic device system according to claim 1 , wherein the first synchronization signal is a signal having a period of 1 second generated based on time information included in the positioning signal. One terminal device applied to an electronic device system including a plurality of terminal devices that perform wireless communication with each other,
A position information detection unit that acquires position information based on a positioning signal including time information by a global positioning system, a wireless communication unit that transmits or receives data by wireless communication, and a communication that controls an operation state of the wireless communication unit A control unit, and a position information correction processing unit that corrects the position information acquired by the position information detection unit,
The position information detection unit generates a first synchronization signal based on the time information when the positioning signal can be received,
The communication control unit activates the wireless communication unit in a sleep state at a timing based on the first synchronization signal, and from the other terminal device having the position information detection unit via the wireless communication unit, Receives correction data necessary for correcting the position information in the position information correction processing unit ,
The position information detection unit, the wireless communication unit, and the communication control unit,
The position information detection unit generates the first synchronization signal based on the time information when the positioning signal is received.
The communication control unit activates the wireless communication unit in a sleep state at a timing based on the first synchronization signal, and transmits the correction data via the wireless communication unit,
When the position information detection unit has not received the positioning signal, the position information detection unit generates a second synchronization signal based on an internal clock of the position information detection unit,
The communication control unit activates the wireless communication unit based on the second synchronization signal, and transmits the correction data.
If the positioning signal is not transmitted, the wireless communication unit is activated again and transmitted until the next activation timing based on the second synchronization signal.
Terminal equipment characterized by that. A method for controlling an electronic device system including a plurality of terminal devices that perform wireless communication with each other,
Each terminal device has a position information detection unit that acquires position information based on a positioning signal that includes time information by a global positioning system, and a wireless communication unit that transmits or receives data by wireless communication,
In each terminal device, when the positioning signal can be received, a first synchronization signal is generated based on the time information,
Activating the wireless communication unit in the sleep state of each terminal device at a timing based on the first synchronization signal,
In one terminal device in the plurality of terminal devices, the position information acquired by the position information detection unit transmitted from another terminal device in the plurality of terminal devices is corrected via the wireless communication unit. Receive the necessary correction data,
In the one terminal device, the position information is corrected based on the received correction data ,
In each terminal device, when the positioning signal is not received,
Generating a second synchronization signal based on the internal clock of the position information detector;
Based on the second synchronization signal, activate the wireless communication unit, try to transmit or receive the correction data,
The specific terminal device that has attempted to receive the correction data in the plurality of terminal devices and has not received the correction data until the next activation timing based on the second synchronization signal. In the meantime, the operation period of the wireless communication unit is set to a time longer than the operation period of the wireless communication unit of the terminal device attempting to transmit the correction data, and is activated again.
An electronic device system control method characterized by the above. A control program for an electronic device system including a plurality of terminal devices that perform wireless communication with each other,
Each terminal device has a position information detection unit that acquires position information based on a positioning signal including time information by a global positioning system, and a wireless communication unit that transmits and receives data by wireless communication,
On the computer,
In each of the plurality of terminal devices, when the positioning signal can be received, the first synchronization signal is generated based on the time information,
Activating the wireless communication unit in the sleep state of each terminal device at a timing based on the first synchronization signal,
In one terminal device in the plurality of terminal devices, the position information acquired by the position information detection unit transmitted from another terminal device in the plurality of terminal devices is corrected via the wireless communication unit. To receive correction data necessary for
In the one terminal device, the position information is corrected based on the received correction data ,
In each terminal device, when the positioning signal is not received,
Generating a second synchronization signal based on an internal clock of the position information detector;
Based on the second synchronization signal, activate the wireless communication unit, try to transmit or receive the correction data,
The specific terminal device that has attempted to receive the correction data in the plurality of terminal devices and has not received the correction data until the next activation timing based on the second synchronization signal. In the meantime, the operation period of the wireless communication unit is set to a time longer than the operation period of the wireless communication unit of the terminal device attempting to transmit the correction data, and is activated again.
A control program for an electronic device system.

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